diff options
Diffstat (limited to 'fs/cifs')
45 files changed, 4622 insertions, 2031 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig index b16219e5dac9..22cf04fb32d3 100644 --- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -16,7 +16,7 @@ config CIFS select CRYPTO_GCM select CRYPTO_ECB select CRYPTO_AES - select CRYPTO_DES + select CRYPTO_LIB_DES select KEYS help This is the client VFS module for the SMB3 family of NAS protocols, @@ -211,3 +211,11 @@ config CIFS_FSCACHE Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data to be cached locally on disk through the general filesystem cache manager. If unsure, say N. + +config CIFS_ROOT + bool "SMB root file system (Experimental)" + depends on CIFS=y && IP_PNP + help + Enables root file system support over SMB protocol. + + Most people say N here. diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile index 41332f20055b..51bae9340842 100644 --- a/fs/cifs/Makefile +++ b/fs/cifs/Makefile @@ -21,3 +21,5 @@ cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o dfs_cache.o cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o + +cifs-$(CONFIG_CIFS_ROOT) += cifsroot.o diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index a38d796f5ffe..276e4b5ea8e0 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -122,6 +122,27 @@ static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon) } static void +cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) +{ + struct TCP_Server_Info *server = chan->server; + + seq_printf(m, "\t\tChannel %d Number of credits: %d Dialect 0x%x " + "TCP status: %d Instance: %d Local Users To Server: %d " + "SecMode: 0x%x Req On Wire: %d In Send: %d " + "In MaxReq Wait: %d\n", + i+1, + server->credits, + server->dialect, + server->tcpStatus, + server->reconnect_instance, + server->srv_count, + server->sec_mode, + in_flight(server), + atomic_read(&server->in_send), + atomic_read(&server->num_waiters)); +} + +static void cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface) { struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; @@ -256,6 +277,11 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v) if (!server->rdma) goto skip_rdma; + if (!server->smbd_conn) { + seq_printf(m, "\nSMBDirect transport not available"); + goto skip_rdma; + } + seq_printf(m, "\nSMBDirect (in hex) protocol version: %x " "transport status: %x", server->smbd_conn->protocol, @@ -360,11 +386,10 @@ skip_rdma: server->srv_count, server->sec_mode, in_flight(server)); -#ifdef CONFIG_CIFS_STATS2 seq_printf(m, " In Send: %d In MaxReq Wait: %d", atomic_read(&server->in_send), atomic_read(&server->num_waiters)); -#endif + /* dump session id helpful for use with network trace */ seq_printf(m, " SessionId: 0x%llx", ses->Suid); if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) @@ -372,6 +397,13 @@ skip_rdma: if (ses->sign) seq_puts(m, " signed"); + if (ses->chan_count > 1) { + seq_printf(m, "\n\n\tExtra Channels: %zu\n", + ses->chan_count-1); + for (j = 1; j < ses->chan_count; j++) + cifs_dump_channel(m, j, &ses->chans[j]); + } + seq_puts(m, "\n\tShares:"); j = 0; @@ -410,8 +442,13 @@ skip_rdma: seq_printf(m, "\n\tServer interfaces: %zu\n", ses->iface_count); for (j = 0; j < ses->iface_count; j++) { + struct cifs_server_iface *iface; + + iface = &ses->iface_list[j]; seq_printf(m, "\t%d)", j); - cifs_dump_iface(m, &ses->iface_list[j]); + cifs_dump_iface(m, iface); + if (is_ses_using_iface(ses, iface)) + seq_puts(m, "\t\t[CONNECTED]\n"); } spin_unlock(&ses->iface_lock); } @@ -452,6 +489,7 @@ static ssize_t cifs_stats_proc_write(struct file *file, list_for_each(tmp1, &cifs_tcp_ses_list) { server = list_entry(tmp1, struct TCP_Server_Info, tcp_ses_list); + server->max_in_flight = 0; #ifdef CONFIG_CIFS_STATS2 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { atomic_set(&server->num_cmds[i], 0); @@ -526,6 +564,7 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v) list_for_each(tmp1, &cifs_tcp_ses_list) { server = list_entry(tmp1, struct TCP_Server_Info, tcp_ses_list); + seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); #ifdef CONFIG_CIFS_STATS2 seq_puts(m, "\nTotal time spent processing by command. Time "); seq_printf(m, "units are jiffies (%d per second)\n", HZ); @@ -572,12 +611,12 @@ static int cifs_stats_proc_open(struct inode *inode, struct file *file) return single_open(file, cifs_stats_proc_show, NULL); } -static const struct file_operations cifs_stats_proc_fops = { - .open = cifs_stats_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = cifs_stats_proc_write, +static const struct proc_ops cifs_stats_proc_ops = { + .proc_open = cifs_stats_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = cifs_stats_proc_write, }; #ifdef CONFIG_CIFS_SMB_DIRECT @@ -601,12 +640,12 @@ static int name##_open(struct inode *inode, struct file *file) \ return single_open(file, name##_proc_show, NULL); \ } \ \ -static const struct file_operations cifs_##name##_proc_fops = { \ - .open = name##_open, \ - .read = seq_read, \ - .llseek = seq_lseek, \ - .release = single_release, \ - .write = name##_write, \ +static const struct proc_ops cifs_##name##_proc_fops = { \ + .proc_open = name##_open, \ + .proc_read = seq_read, \ + .proc_lseek = seq_lseek, \ + .proc_release = single_release, \ + .proc_write = name##_write, \ } PROC_FILE_DEFINE(rdma_readwrite_threshold); @@ -620,11 +659,11 @@ PROC_FILE_DEFINE(smbd_receive_credit_max); #endif static struct proc_dir_entry *proc_fs_cifs; -static const struct file_operations cifsFYI_proc_fops; -static const struct file_operations cifs_lookup_cache_proc_fops; -static const struct file_operations traceSMB_proc_fops; -static const struct file_operations cifs_security_flags_proc_fops; -static const struct file_operations cifs_linux_ext_proc_fops; +static const struct proc_ops cifsFYI_proc_ops; +static const struct proc_ops cifs_lookup_cache_proc_ops; +static const struct proc_ops traceSMB_proc_ops; +static const struct proc_ops cifs_security_flags_proc_ops; +static const struct proc_ops cifs_linux_ext_proc_ops; void cifs_proc_init(void) @@ -639,18 +678,18 @@ cifs_proc_init(void) proc_create_single("open_files", 0400, proc_fs_cifs, cifs_debug_files_proc_show); - proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops); - proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops); - proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops); + proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); + proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); + proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, - &cifs_linux_ext_proc_fops); + &cifs_linux_ext_proc_ops); proc_create("SecurityFlags", 0644, proc_fs_cifs, - &cifs_security_flags_proc_fops); + &cifs_security_flags_proc_ops); proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, - &cifs_lookup_cache_proc_fops); + &cifs_lookup_cache_proc_ops); #ifdef CONFIG_CIFS_DFS_UPCALL - proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_fops); + proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); #endif #ifdef CONFIG_CIFS_SMB_DIRECT @@ -735,12 +774,12 @@ static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, return count; } -static const struct file_operations cifsFYI_proc_fops = { - .open = cifsFYI_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = cifsFYI_proc_write, +static const struct proc_ops cifsFYI_proc_ops = { + .proc_open = cifsFYI_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = cifsFYI_proc_write, }; static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) @@ -766,12 +805,12 @@ static ssize_t cifs_linux_ext_proc_write(struct file *file, return count; } -static const struct file_operations cifs_linux_ext_proc_fops = { - .open = cifs_linux_ext_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = cifs_linux_ext_proc_write, +static const struct proc_ops cifs_linux_ext_proc_ops = { + .proc_open = cifs_linux_ext_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = cifs_linux_ext_proc_write, }; static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) @@ -797,12 +836,12 @@ static ssize_t cifs_lookup_cache_proc_write(struct file *file, return count; } -static const struct file_operations cifs_lookup_cache_proc_fops = { - .open = cifs_lookup_cache_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = cifs_lookup_cache_proc_write, +static const struct proc_ops cifs_lookup_cache_proc_ops = { + .proc_open = cifs_lookup_cache_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = cifs_lookup_cache_proc_write, }; static int traceSMB_proc_show(struct seq_file *m, void *v) @@ -828,12 +867,12 @@ static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, return count; } -static const struct file_operations traceSMB_proc_fops = { - .open = traceSMB_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = traceSMB_proc_write, +static const struct proc_ops traceSMB_proc_ops = { + .proc_open = traceSMB_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = traceSMB_proc_write, }; static int cifs_security_flags_proc_show(struct seq_file *m, void *v) @@ -939,12 +978,12 @@ static ssize_t cifs_security_flags_proc_write(struct file *file, return count; } -static const struct file_operations cifs_security_flags_proc_fops = { - .open = cifs_security_flags_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = cifs_security_flags_proc_write, +static const struct proc_ops cifs_security_flags_proc_ops = { + .proc_open = cifs_security_flags_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = cifs_security_flags_proc_write, }; #else inline void cifs_proc_init(void) diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h index 3d392620a2f4..100b0056a369 100644 --- a/fs/cifs/cifs_debug.h +++ b/fs/cifs/cifs_debug.h @@ -80,6 +80,60 @@ do { \ type, fmt, ##__VA_ARGS__); \ } while (0) +#define cifs_server_dbg_func(ratefunc, type, fmt, ...) \ +do { \ + const char *sn = ""; \ + if (server && server->hostname) \ + sn = server->hostname; \ + if ((type) & FYI && cifsFYI & CIFS_INFO) { \ + pr_debug_ ## ratefunc("%s: \\\\%s " fmt, \ + __FILE__, sn, ##__VA_ARGS__); \ + } else if ((type) & VFS) { \ + pr_err_ ## ratefunc("CIFS VFS: \\\\%s " fmt, \ + sn, ##__VA_ARGS__); \ + } else if ((type) & NOISY && (NOISY != 0)) { \ + pr_debug_ ## ratefunc("\\\\%s " fmt, \ + sn, ##__VA_ARGS__); \ + } \ +} while (0) + +#define cifs_server_dbg(type, fmt, ...) \ +do { \ + if ((type) & ONCE) \ + cifs_server_dbg_func(once, \ + type, fmt, ##__VA_ARGS__); \ + else \ + cifs_server_dbg_func(ratelimited, \ + type, fmt, ##__VA_ARGS__); \ +} while (0) + +#define cifs_tcon_dbg_func(ratefunc, type, fmt, ...) \ +do { \ + const char *tn = ""; \ + if (tcon && tcon->treeName) \ + tn = tcon->treeName; \ + if ((type) & FYI && cifsFYI & CIFS_INFO) { \ + pr_debug_ ## ratefunc("%s: %s " fmt, \ + __FILE__, tn, ##__VA_ARGS__); \ + } else if ((type) & VFS) { \ + pr_err_ ## ratefunc("CIFS VFS: %s " fmt, \ + tn, ##__VA_ARGS__); \ + } else if ((type) & NOISY && (NOISY != 0)) { \ + pr_debug_ ## ratefunc("%s " fmt, \ + tn, ##__VA_ARGS__); \ + } \ +} while (0) + +#define cifs_tcon_dbg(type, fmt, ...) \ +do { \ + if ((type) & ONCE) \ + cifs_tcon_dbg_func(once, \ + type, fmt, ##__VA_ARGS__); \ + else \ + cifs_tcon_dbg_func(ratelimited, \ + type, fmt, ##__VA_ARGS__); \ +} while (0) + /* * debug OFF * --------- @@ -91,6 +145,19 @@ do { \ pr_debug(fmt, ##__VA_ARGS__); \ } while (0) +#define cifs_server_dbg(type, fmt, ...) \ +do { \ + if (0) \ + pr_debug("\\\\%s " fmt, \ + server->hostname, ##__VA_ARGS__); \ +} while (0) + +#define cifs_tcon_dbg(type, fmt, ...) \ +do { \ + if (0) \ + pr_debug("%s " fmt, tcon->treeName, ##__VA_ARGS__); \ +} while (0) + #define cifs_info(fmt, ...) \ do { \ pr_info("CIFS: "fmt, ##__VA_ARGS__); \ diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c index 41957b82d796..606f26d862dc 100644 --- a/fs/cifs/cifs_dfs_ref.c +++ b/fs/cifs/cifs_dfs_ref.c @@ -120,17 +120,17 @@ cifs_build_devname(char *nodename, const char *prepath) /** - * cifs_compose_mount_options - creates mount options for refferral + * cifs_compose_mount_options - creates mount options for referral * @sb_mountdata: parent/root DFS mount options (template) * @fullpath: full path in UNC format - * @ref: server's referral + * @ref: optional server's referral * @devname: optional pointer for saving device name * * creates mount options for submount based on template options sb_mountdata * and replacing unc,ip,prefixpath options with ones we've got form ref_unc. * * Returns: pointer to new mount options or ERR_PTR. - * Caller is responcible for freeing retunrned value if it is not error. + * Caller is responsible for freeing returned value if it is not error. */ char *cifs_compose_mount_options(const char *sb_mountdata, const char *fullpath, @@ -150,18 +150,27 @@ char *cifs_compose_mount_options(const char *sb_mountdata, if (sb_mountdata == NULL) return ERR_PTR(-EINVAL); - if (strlen(fullpath) - ref->path_consumed) { - prepath = fullpath + ref->path_consumed; - /* skip initial delimiter */ - if (*prepath == '/' || *prepath == '\\') - prepath++; - } + if (ref) { + if (strlen(fullpath) - ref->path_consumed) { + prepath = fullpath + ref->path_consumed; + /* skip initial delimiter */ + if (*prepath == '/' || *prepath == '\\') + prepath++; + } - name = cifs_build_devname(ref->node_name, prepath); - if (IS_ERR(name)) { - rc = PTR_ERR(name); - name = NULL; - goto compose_mount_options_err; + name = cifs_build_devname(ref->node_name, prepath); + if (IS_ERR(name)) { + rc = PTR_ERR(name); + name = NULL; + goto compose_mount_options_err; + } + } else { + name = cifs_build_devname((char *)fullpath, NULL); + if (IS_ERR(name)) { + rc = PTR_ERR(name); + name = NULL; + goto compose_mount_options_err; + } } rc = dns_resolve_server_name_to_ip(name, &srvIP); @@ -225,6 +234,8 @@ char *cifs_compose_mount_options(const char *sb_mountdata, if (devname) *devname = name; + else + kfree(name); /*cifs_dbg(FYI, "%s: parent mountdata: %s\n", __func__, sb_mountdata);*/ /*cifs_dbg(FYI, "%s: submount mountdata: %s\n", __func__, mountdata );*/ @@ -241,23 +252,23 @@ compose_mount_options_err: } /** - * cifs_dfs_do_refmount - mounts specified path using provided refferal + * cifs_dfs_do_mount - mounts specified path using DFS full path + * + * Always pass down @fullpath to smb3_do_mount() so we can use the root server + * to perform failover in case we failed to connect to the first target in the + * referral. + * * @cifs_sb: parent/root superblock * @fullpath: full path in UNC format - * @ref: server's referral */ -static struct vfsmount *cifs_dfs_do_refmount(struct dentry *mntpt, - struct cifs_sb_info *cifs_sb, - const char *fullpath, const struct dfs_info3_param *ref) +static struct vfsmount *cifs_dfs_do_mount(struct dentry *mntpt, + struct cifs_sb_info *cifs_sb, + const char *fullpath) { struct vfsmount *mnt; char *mountdata; char *devname; - /* - * Always pass down the DFS full path to smb3_do_mount() so we - * can use it later for failover. - */ devname = kstrndup(fullpath, strlen(fullpath), GFP_KERNEL); if (!devname) return ERR_PTR(-ENOMEM); @@ -266,7 +277,7 @@ static struct vfsmount *cifs_dfs_do_refmount(struct dentry *mntpt, /* strip first '\' from fullpath */ mountdata = cifs_compose_mount_options(cifs_sb->mountdata, - fullpath + 1, ref, NULL); + fullpath + 1, NULL, NULL); if (IS_ERR(mountdata)) { kfree(devname); return (struct vfsmount *)mountdata; @@ -278,28 +289,16 @@ static struct vfsmount *cifs_dfs_do_refmount(struct dentry *mntpt, return mnt; } -static void dump_referral(const struct dfs_info3_param *ref) -{ - cifs_dbg(FYI, "DFS: ref path: %s\n", ref->path_name); - cifs_dbg(FYI, "DFS: node path: %s\n", ref->node_name); - cifs_dbg(FYI, "DFS: fl: %d, srv_type: %d\n", - ref->flags, ref->server_type); - cifs_dbg(FYI, "DFS: ref_flags: %d, path_consumed: %d\n", - ref->ref_flag, ref->path_consumed); -} - /* * Create a vfsmount that we can automount */ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt) { - struct dfs_info3_param referral = {0}; struct cifs_sb_info *cifs_sb; struct cifs_ses *ses; struct cifs_tcon *tcon; char *full_path, *root_path; unsigned int xid; - int len; int rc; struct vfsmount *mnt; @@ -357,7 +356,7 @@ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt) if (!rc) { rc = dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), full_path + 1, - &referral, NULL); + NULL, NULL); } free_xid(xid); @@ -366,26 +365,16 @@ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt) mnt = ERR_PTR(rc); goto free_root_path; } - - dump_referral(&referral); - - len = strlen(referral.node_name); - if (len < 2) { - cifs_dbg(VFS, "%s: Net Address path too short: %s\n", - __func__, referral.node_name); - mnt = ERR_PTR(-EINVAL); - goto free_dfs_ref; - } /* - * cifs_mount() will retry every available node server in case - * of failures. + * OK - we were able to get and cache a referral for @full_path. + * + * Now, pass it down to cifs_mount() and it will retry every available + * node server in case of failures - no need to do it here. */ - mnt = cifs_dfs_do_refmount(mntpt, cifs_sb, full_path, &referral); - cifs_dbg(FYI, "%s: cifs_dfs_do_refmount:%s , mnt:%p\n", __func__, - referral.node_name, mnt); + mnt = cifs_dfs_do_mount(mntpt, cifs_sb, full_path); + cifs_dbg(FYI, "%s: cifs_dfs_do_mount:%s , mnt:%p\n", __func__, + full_path + 1, mnt); -free_dfs_ref: - free_dfs_info_param(&referral); free_root_path: kfree(root_path); free_full_path: diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h index b326d2ca3765..6e7c4427369d 100644 --- a/fs/cifs/cifs_fs_sb.h +++ b/fs/cifs/cifs_fs_sb.h @@ -53,6 +53,8 @@ #define CIFS_MOUNT_NO_HANDLE_CACHE 0x4000000 /* disable caching dir handles */ #define CIFS_MOUNT_NO_DFS 0x8000000 /* disable DFS resolving */ #define CIFS_MOUNT_MODE_FROM_SID 0x10000000 /* retrieve mode from special ACE */ +#define CIFS_MOUNT_RO_CACHE 0x20000000 /* assumes share will not change */ +#define CIFS_MOUNT_RW_CACHE 0x40000000 /* assumes only client accessing */ struct cifs_sb_info { struct rb_root tlink_tree; diff --git a/fs/cifs/cifs_ioctl.h b/fs/cifs/cifs_ioctl.h index 086ddc5108af..153d5c842a9b 100644 --- a/fs/cifs/cifs_ioctl.h +++ b/fs/cifs/cifs_ioctl.h @@ -46,6 +46,7 @@ struct smb_snapshot_array { /* query_info flags */ #define PASSTHRU_QUERY_INFO 0x00000000 #define PASSTHRU_FSCTL 0x00000001 +#define PASSTHRU_SET_INFO 0x00000002 struct smb_query_info { __u32 info_type; __u32 file_info_class; @@ -56,9 +57,24 @@ struct smb_query_info { /* char buffer[]; */ } __packed; +struct smb3_key_debug_info { + __u64 Suid; + __u16 cipher_type; + __u8 auth_key[16]; /* SMB2_NTLMV2_SESSKEY_SIZE */ + __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE]; + __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE]; +} __packed; + +struct smb3_notify { + __u32 completion_filter; + bool watch_tree; +} __packed; + #define CIFS_IOCTL_MAGIC 0xCF #define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int) #define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4) #define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info) #define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array) #define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info) +#define CIFS_DUMP_KEY _IOWR(CIFS_IOCTL_MAGIC, 8, struct smb3_key_debug_info) +#define CIFS_IOC_NOTIFY _IOW(CIFS_IOCTL_MAGIC, 9, struct smb3_notify) diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c index 7f01c6e60791..7b9b876b513b 100644 --- a/fs/cifs/cifs_spnego.c +++ b/fs/cifs/cifs_spnego.c @@ -98,7 +98,7 @@ struct key_type cifs_spnego_key_type = { struct key * cifs_get_spnego_key(struct cifs_ses *sesInfo) { - struct TCP_Server_Info *server = sesInfo->server; + struct TCP_Server_Info *server = cifs_ses_server(sesInfo); struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; char *description, *dp; diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 1d377b7f2860..716574aab3b6 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -39,8 +39,6 @@ static const struct cifs_sid sid_everyone = { /* security id for Authenticated Users system group */ static const struct cifs_sid sid_authusers = { 1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11)} }; -/* group users */ -static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} }; /* S-1-22-1 Unmapped Unix users */ static const struct cifs_sid sid_unix_users = {1, 1, {0, 0, 0, 0, 0, 22}, @@ -603,7 +601,7 @@ static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode, ((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) *pmode |= (S_IXUGO & (*pbits_to_set)); - cifs_dbg(NOISY, "access flags 0x%x mode now 0x%x\n", flags, *pmode); + cifs_dbg(NOISY, "access flags 0x%x mode now %04o\n", flags, *pmode); return; } @@ -632,7 +630,7 @@ static void mode_to_access_flags(umode_t mode, umode_t bits_to_use, if (mode & S_IXUGO) *pace_flags |= SET_FILE_EXEC_RIGHTS; - cifs_dbg(NOISY, "mode: 0x%x, access flags now 0x%x\n", + cifs_dbg(NOISY, "mode: %04o, access flags now 0x%x\n", mode, *pace_flags); return; } @@ -701,10 +699,9 @@ static void dump_ace(struct cifs_ace *pace, char *end_of_acl) } #endif - static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, - struct cifs_fattr *fattr) + struct cifs_fattr *fattr, bool mode_from_special_sid) { int i; int num_aces = 0; @@ -757,22 +754,34 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, #ifdef CONFIG_CIFS_DEBUG2 dump_ace(ppace[i], end_of_acl); #endif - if (compare_sids(&(ppace[i]->sid), pownersid) == 0) + if (mode_from_special_sid && + (compare_sids(&(ppace[i]->sid), + &sid_unix_NFS_mode) == 0)) { + /* + * Full permissions are: + * 07777 = S_ISUID | S_ISGID | S_ISVTX | + * S_IRWXU | S_IRWXG | S_IRWXO + */ + fattr->cf_mode &= ~07777; + fattr->cf_mode |= + le32_to_cpu(ppace[i]->sid.sub_auth[2]); + break; + } else if (compare_sids(&(ppace[i]->sid), pownersid) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, &user_mask); - if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0) + else if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, &group_mask); - if (compare_sids(&(ppace[i]->sid), &sid_everyone) == 0) + else if (compare_sids(&(ppace[i]->sid), &sid_everyone) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, &other_mask); - if (compare_sids(&(ppace[i]->sid), &sid_authusers) == 0) + else if (compare_sids(&(ppace[i]->sid), &sid_authusers) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, @@ -793,24 +802,81 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, return; } +unsigned int setup_authusers_ACE(struct cifs_ace *pntace) +{ + int i; + unsigned int ace_size = 20; + + pntace->type = ACCESS_ALLOWED_ACE_TYPE; + pntace->flags = 0x0; + pntace->access_req = cpu_to_le32(GENERIC_ALL); + pntace->sid.num_subauth = 1; + pntace->sid.revision = 1; + for (i = 0; i < NUM_AUTHS; i++) + pntace->sid.authority[i] = sid_authusers.authority[i]; + + pntace->sid.sub_auth[0] = sid_authusers.sub_auth[0]; + + /* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */ + pntace->size = cpu_to_le16(ace_size); + return ace_size; +} + +/* + * Fill in the special SID based on the mode. See + * http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx + */ +unsigned int setup_special_mode_ACE(struct cifs_ace *pntace, __u64 nmode) +{ + int i; + unsigned int ace_size = 28; + + pntace->type = ACCESS_DENIED_ACE_TYPE; + pntace->flags = 0x0; + pntace->access_req = 0; + pntace->sid.num_subauth = 3; + pntace->sid.revision = 1; + for (i = 0; i < NUM_AUTHS; i++) + pntace->sid.authority[i] = sid_unix_NFS_mode.authority[i]; + + pntace->sid.sub_auth[0] = sid_unix_NFS_mode.sub_auth[0]; + pntace->sid.sub_auth[1] = sid_unix_NFS_mode.sub_auth[1]; + pntace->sid.sub_auth[2] = cpu_to_le32(nmode & 07777); + + /* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */ + pntace->size = cpu_to_le16(ace_size); + return ace_size; +} static int set_chmod_dacl(struct cifs_acl *pndacl, struct cifs_sid *pownersid, - struct cifs_sid *pgrpsid, __u64 nmode) + struct cifs_sid *pgrpsid, __u64 nmode, bool modefromsid) { u16 size = 0; + u32 num_aces = 0; struct cifs_acl *pnndacl; pnndacl = (struct cifs_acl *)((char *)pndacl + sizeof(struct cifs_acl)); + if (modefromsid) { + struct cifs_ace *pntace = + (struct cifs_ace *)((char *)pnndacl + size); + + size += setup_special_mode_ACE(pntace, nmode); + num_aces++; + } + size += fill_ace_for_sid((struct cifs_ace *) ((char *)pnndacl + size), pownersid, nmode, S_IRWXU); + num_aces++; size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size), pgrpsid, nmode, S_IRWXG); + num_aces++; size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size), &sid_everyone, nmode, S_IRWXO); + num_aces++; + pndacl->num_aces = cpu_to_le32(num_aces); pndacl->size = cpu_to_le16(size + sizeof(struct cifs_acl)); - pndacl->num_aces = cpu_to_le32(3); return 0; } @@ -851,7 +917,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl) /* Convert CIFS ACL to POSIX form */ static int parse_sec_desc(struct cifs_sb_info *cifs_sb, - struct cifs_ntsd *pntsd, int acl_len, struct cifs_fattr *fattr) + struct cifs_ntsd *pntsd, int acl_len, struct cifs_fattr *fattr, + bool get_mode_from_special_sid) { int rc = 0; struct cifs_sid *owner_sid_ptr, *group_sid_ptr; @@ -900,7 +967,7 @@ static int parse_sec_desc(struct cifs_sb_info *cifs_sb, if (dacloffset) parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, - group_sid_ptr, fattr); + group_sid_ptr, fattr, get_mode_from_special_sid); else cifs_dbg(FYI, "no ACL\n"); /* BB grant all or default perms? */ @@ -909,7 +976,8 @@ static int parse_sec_desc(struct cifs_sb_info *cifs_sb, /* Convert permission bits from mode to equivalent CIFS ACL */ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, - __u32 secdesclen, __u64 nmode, kuid_t uid, kgid_t gid, int *aclflag) + __u32 secdesclen, __u64 nmode, kuid_t uid, kgid_t gid, + bool mode_from_sid, int *aclflag) { int rc = 0; __u32 dacloffset; @@ -934,7 +1002,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, ndacl_ptr->num_aces = 0; rc = set_chmod_dacl(ndacl_ptr, owner_sid_ptr, group_sid_ptr, - nmode); + nmode, mode_from_sid); sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size); /* copy sec desc control portion & owner and group sids */ copy_sec_desc(pntsd, pnntsd, sidsoffset); @@ -1016,7 +1084,7 @@ static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, struct cifs_ntsd *pntsd = NULL; int oplock = 0; unsigned int xid; - int rc, create_options = 0; + int rc; struct cifs_tcon *tcon; struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); struct cifs_fid fid; @@ -1028,13 +1096,10 @@ static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, tcon = tlink_tcon(tlink); xid = get_xid(); - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = READ_CONTROL; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.disposition = FILE_OPEN; oparms.path = path; oparms.fid = &fid; @@ -1079,7 +1144,7 @@ int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen, { int oplock = 0; unsigned int xid; - int rc, access_flags, create_options = 0; + int rc, access_flags; struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); @@ -1092,9 +1157,6 @@ int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen, tcon = tlink_tcon(tlink); xid = get_xid(); - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP) access_flags = WRITE_OWNER; else @@ -1103,7 +1165,7 @@ int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = access_flags; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.disposition = FILE_OPEN; oparms.path = path; oparms.fid = &fid; @@ -1128,8 +1190,8 @@ out: /* Translate the CIFS ACL (similar to NTFS ACL) for a file into mode bits */ int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, - struct inode *inode, const char *path, - const struct cifs_fid *pfid) + struct inode *inode, bool mode_from_special_sid, + const char *path, const struct cifs_fid *pfid) { struct cifs_ntsd *pntsd = NULL; u32 acllen = 0; @@ -1156,8 +1218,11 @@ cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, if (IS_ERR(pntsd)) { rc = PTR_ERR(pntsd); cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc); + } else if (mode_from_special_sid) { + rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, true); } else { - rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr); + /* get approximated mode from ACL */ + rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, false); kfree(pntsd); if (rc) cifs_dbg(VFS, "parse sec desc failed rc = %d\n", rc); @@ -1181,6 +1246,7 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode, struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); struct smb_version_operations *ops; + bool mode_from_sid; if (IS_ERR(tlink)) return PTR_ERR(tlink); @@ -1218,8 +1284,13 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode, return -ENOMEM; } + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) + mode_from_sid = true; + else + mode_from_sid = false; + rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid, - &aclflag); + mode_from_sid, &aclflag); cifs_dbg(NOISY, "build_sec_desc rc: %d\n", rc); diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h index dd95a6fa24bf..21d7dee98d01 100644 --- a/fs/cifs/cifsacl.h +++ b/fs/cifs/cifsacl.h @@ -45,7 +45,7 @@ */ #define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \ sizeof(struct cifs_acl) + \ - (sizeof(struct cifs_ace) * 3)) + (sizeof(struct cifs_ace) * 4)) /* * Maximum size of a string representation of a SID: @@ -90,8 +90,39 @@ struct cifs_acl { __le32 num_aces; } __attribute__((packed)); +/* ACE types - see MS-DTYP 2.4.4.1 */ +#define ACCESS_ALLOWED_ACE_TYPE 0x00 +#define ACCESS_DENIED_ACE_TYPE 0x01 +#define SYSTEM_AUDIT_ACE_TYPE 0x02 +#define SYSTEM_ALARM_ACE_TYPE 0x03 +#define ACCESS_ALLOWED_COMPOUND_ACE_TYPE 0x04 +#define ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 +#define ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 +#define SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 +#define SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 +#define ACCESS_ALLOWED_CALLBACK_ACE_TYPE 0x09 +#define ACCESS_DENIED_CALLBACK_ACE_TYPE 0x0A +#define ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE 0x0B +#define ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE 0x0C +#define SYSTEM_AUDIT_CALLBACK_ACE_TYPE 0x0D +#define SYSTEM_ALARM_CALLBACK_ACE_TYPE 0x0E /* Reserved */ +#define SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE 0x0F +#define SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE 0x10 /* reserved */ +#define SYSTEM_MANDATORY_LABEL_ACE_TYPE 0x11 +#define SYSTEM_RESOURCE_ATTRIBUTE_ACE_TYPE 0x12 +#define SYSTEM_SCOPED_POLICY_ID_ACE_TYPE 0x13 + +/* ACE flags */ +#define OBJECT_INHERIT_ACE 0x01 +#define CONTAINER_INHERIT_ACE 0x02 +#define NO_PROPAGATE_INHERIT_ACE 0x04 +#define INHERIT_ONLY_ACE 0x08 +#define INHERITED_ACE 0x10 +#define SUCCESSFUL_ACCESS_ACE_FLAG 0x40 +#define FAILED_ACCESS_ACE_FLAG 0x80 + struct cifs_ace { - __u8 type; + __u8 type; /* see above and MS-DTYP 2.4.4.1 */ __u8 flags; __le16 size; __le32 access_req; @@ -99,6 +130,54 @@ struct cifs_ace { } __attribute__((packed)); /* + * The current SMB3 form of security descriptor is similar to what was used for + * cifs (see above) but some fields are split, and fields in the struct below + * matches names of fields to the the spec, MS-DTYP (see sections 2.4.5 and + * 2.4.6). Note that "CamelCase" fields are used in this struct in order to + * match the MS-DTYP and MS-SMB2 specs which define the wire format. + */ +struct smb3_sd { + __u8 Revision; /* revision level, MUST be one */ + __u8 Sbz1; /* only meaningful if 'RM' flag set below */ + __le16 Control; + __le32 OffsetOwner; + __le32 OffsetGroup; + __le32 OffsetSacl; + __le32 OffsetDacl; +} __packed; + +/* Meaning of 'Control' field flags */ +#define ACL_CONTROL_SR 0x8000 /* Self relative */ +#define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */ +#define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */ +#define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */ +#define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */ +#define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */ +#define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */ +#define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritence */ +#define ACL_CONTROL_SS 0x0080 /* Create server ACL */ +#define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */ +#define ACL_CONTROL_SD 0x0020 /* SACL defaulted */ +#define ACL_CONTROL_SP 0x0010 /* SACL is present on object */ +#define ACL_CONTROL_DD 0x0008 /* DACL defaulted */ +#define ACL_CONTROL_DP 0x0004 /* DACL is present on object */ +#define ACL_CONTROL_GD 0x0002 /* Group was defaulted */ +#define ACL_CONTROL_OD 0x0001 /* User was defaulted */ + +/* Meaning of AclRevision flags */ +#define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */ +#define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */ + +struct smb3_acl { + u8 AclRevision; /* revision level */ + u8 Sbz1; /* MBZ */ + __le16 AclSize; + __le16 AceCount; + __le16 Sbz2; /* MBZ */ +} __packed; + + +/* * Minimum security identifier can be one for system defined Users * and Groups such as NULL SID and World or Built-in accounts such * as Administrator and Guest and consists of diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 3289b566463f..46ebaf3f0824 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -56,6 +56,15 @@ #include "dfs_cache.h" #endif +/* + * DOS dates from 1980/1/1 through 2107/12/31 + * Protocol specifications indicate the range should be to 119, which + * limits maximum year to 2099. But this range has not been checked. + */ +#define SMB_DATE_MAX (127<<9 | 12<<5 | 31) +#define SMB_DATE_MIN (0<<9 | 1<<5 | 1) +#define SMB_TIME_MAX (23<<11 | 59<<5 | 29) + int cifsFYI = 0; bool traceSMB; bool enable_oplocks = true; @@ -109,6 +118,8 @@ extern mempool_t *cifs_req_poolp; extern mempool_t *cifs_mid_poolp; struct workqueue_struct *cifsiod_wq; +struct workqueue_struct *decrypt_wq; +struct workqueue_struct *fileinfo_put_wq; struct workqueue_struct *cifsoplockd_wq; __u32 cifs_lock_secret; @@ -142,6 +153,7 @@ cifs_read_super(struct super_block *sb) struct inode *inode; struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; + struct timespec64 ts; int rc = 0; cifs_sb = CIFS_SB(sb); @@ -158,8 +170,34 @@ cifs_read_super(struct super_block *sb) else sb->s_maxbytes = MAX_NON_LFS; - /* BB FIXME fix time_gran to be larger for LANMAN sessions */ - sb->s_time_gran = 100; + /* + * Some very old servers like DOS and OS/2 used 2 second granularity + * (while all current servers use 100ns granularity - see MS-DTYP) + * but 1 second is the maximum allowed granularity for the VFS + * so for old servers set time granularity to 1 second while for + * everything else (current servers) set it to 100ns. + */ + if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) && + ((tcon->ses->capabilities & + tcon->ses->server->vals->cap_nt_find) == 0) && + !tcon->unix_ext) { + sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */ + ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0); + sb->s_time_min = ts.tv_sec; + ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX), + cpu_to_le16(SMB_TIME_MAX), 0); + sb->s_time_max = ts.tv_sec; + } else { + /* + * Almost every server, including all SMB2+, uses DCE TIME + * ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC + */ + sb->s_time_gran = 100; + ts = cifs_NTtimeToUnix(0); + sb->s_time_min = ts.tv_sec; + ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX)); + sb->s_time_max = ts.tv_sec; + } sb->s_magic = CIFS_MAGIC_NUMBER; sb->s_op = &cifs_super_ops; @@ -237,7 +275,7 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_ffree = 0; /* unlimited */ if (server->ops->queryfs) - rc = server->ops->queryfs(xid, tcon, buf); + rc = server->ops->queryfs(xid, tcon, cifs_sb, buf); free_xid(xid); return 0; @@ -376,7 +414,7 @@ cifs_show_security(struct seq_file *s, struct cifs_ses *ses) seq_puts(s, "ntlm"); break; case Kerberos: - seq_printf(s, "krb5,cruid=%u", from_kuid_munged(&init_user_ns,ses->cred_uid)); + seq_puts(s, "krb5"); break; case RawNTLMSSP: seq_puts(s, "ntlmssp"); @@ -389,6 +427,10 @@ cifs_show_security(struct seq_file *s, struct cifs_ses *ses) if (ses->sign) seq_puts(s, "i"); + + if (ses->sectype == Kerberos) + seq_printf(s, ",cruid=%u", + from_kuid_munged(&init_user_ns, ses->cred_uid)); } static void @@ -400,6 +442,10 @@ cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) seq_puts(s, "strict"); else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) seq_puts(s, "none"); + else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE) + seq_puts(s, "singleclient"); /* assume only one client access */ + else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) + seq_puts(s, "ro"); /* read only caching assumed */ else seq_puts(s, "loose"); } @@ -433,6 +479,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root) cifs_show_security(s, tcon->ses); cifs_show_cache_flavor(s, cifs_sb); + if (tcon->no_lease) + seq_puts(s, ",nolease"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) seq_puts(s, ",multiuser"); else if (tcon->ses->user_name) @@ -554,6 +602,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root) seq_printf(s, ",rsize=%u", cifs_sb->rsize); seq_printf(s, ",wsize=%u", cifs_sb->wsize); seq_printf(s, ",bsize=%u", cifs_sb->bsize); + if (tcon->ses->server->min_offload) + seq_printf(s, ",esize=%u", tcon->ses->server->min_offload); seq_printf(s, ",echo_interval=%lu", tcon->ses->server->echo_interval / HZ); @@ -568,6 +618,10 @@ cifs_show_options(struct seq_file *s, struct dentry *root) /* convert actimeo and display it in seconds */ seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); + if (tcon->ses->chan_max > 1) + seq_printf(s, ",multichannel,max_channel=%zu", + tcon->ses->chan_max); + return 0; } @@ -680,11 +734,6 @@ cifs_get_root(struct smb_vol *vol, struct super_block *sb) struct inode *dir = d_inode(dentry); struct dentry *child; - if (!dir) { - dput(dentry); - dentry = ERR_PTR(-ENOENT); - break; - } if (!S_ISDIR(dir->i_mode)) { dput(dentry); dentry = ERR_PTR(-ENOTDIR); @@ -701,7 +750,7 @@ cifs_get_root(struct smb_vol *vol, struct super_block *sb) while (*s && *s != sep) s++; - child = lookup_one_len_unlocked(p, dentry, s - p); + child = lookup_positive_unlocked(p, dentry, s - p); dput(dentry); dentry = child; } while (!IS_ERR(dentry)); @@ -1174,6 +1223,7 @@ const struct file_operations cifs_file_ops = { .open = cifs_open, .release = cifs_close, .lock = cifs_lock, + .flock = cifs_flock, .fsync = cifs_fsync, .flush = cifs_flush, .mmap = cifs_file_mmap, @@ -1193,6 +1243,7 @@ const struct file_operations cifs_file_strict_ops = { .open = cifs_open, .release = cifs_close, .lock = cifs_lock, + .flock = cifs_flock, .fsync = cifs_strict_fsync, .flush = cifs_flush, .mmap = cifs_file_strict_mmap, @@ -1212,6 +1263,7 @@ const struct file_operations cifs_file_direct_ops = { .open = cifs_open, .release = cifs_close, .lock = cifs_lock, + .flock = cifs_flock, .fsync = cifs_fsync, .flush = cifs_flush, .mmap = cifs_file_mmap, @@ -1495,11 +1547,32 @@ init_cifs(void) goto out_clean_proc; } + /* + * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3) + * so that we don't launch too many worker threads but + * Documentation/core-api/workqueue.rst recommends setting it to 0 + */ + + /* WQ_UNBOUND allows decrypt tasks to run on any CPU */ + decrypt_wq = alloc_workqueue("smb3decryptd", + WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); + if (!decrypt_wq) { + rc = -ENOMEM; + goto out_destroy_cifsiod_wq; + } + + fileinfo_put_wq = alloc_workqueue("cifsfileinfoput", + WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); + if (!fileinfo_put_wq) { + rc = -ENOMEM; + goto out_destroy_decrypt_wq; + } + cifsoplockd_wq = alloc_workqueue("cifsoplockd", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); if (!cifsoplockd_wq) { rc = -ENOMEM; - goto out_destroy_cifsiod_wq; + goto out_destroy_fileinfo_put_wq; } rc = cifs_fscache_register(); @@ -1565,6 +1638,10 @@ out_unreg_fscache: cifs_fscache_unregister(); out_destroy_cifsoplockd_wq: destroy_workqueue(cifsoplockd_wq); +out_destroy_fileinfo_put_wq: + destroy_workqueue(fileinfo_put_wq); +out_destroy_decrypt_wq: + destroy_workqueue(decrypt_wq); out_destroy_cifsiod_wq: destroy_workqueue(cifsiod_wq); out_clean_proc: @@ -1591,6 +1668,8 @@ exit_cifs(void) cifs_destroy_inodecache(); cifs_fscache_unregister(); destroy_workqueue(cifsoplockd_wq); + destroy_workqueue(decrypt_wq); + destroy_workqueue(fileinfo_put_wq); destroy_workqueue(cifsiod_wq); cifs_proc_clean(); } @@ -1601,18 +1680,17 @@ MODULE_DESCRIPTION ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and " "also older servers complying with the SNIA CIFS Specification)"); MODULE_VERSION(CIFS_VERSION); -MODULE_SOFTDEP("pre: des"); -MODULE_SOFTDEP("pre: ecb"); -MODULE_SOFTDEP("pre: hmac"); -MODULE_SOFTDEP("pre: md4"); -MODULE_SOFTDEP("pre: md5"); -MODULE_SOFTDEP("pre: nls"); -MODULE_SOFTDEP("pre: aes"); -MODULE_SOFTDEP("pre: cmac"); -MODULE_SOFTDEP("pre: sha256"); -MODULE_SOFTDEP("pre: sha512"); -MODULE_SOFTDEP("pre: aead2"); -MODULE_SOFTDEP("pre: ccm"); -MODULE_SOFTDEP("pre: gcm"); +MODULE_SOFTDEP("ecb"); +MODULE_SOFTDEP("hmac"); +MODULE_SOFTDEP("md4"); +MODULE_SOFTDEP("md5"); +MODULE_SOFTDEP("nls"); +MODULE_SOFTDEP("aes"); +MODULE_SOFTDEP("cmac"); +MODULE_SOFTDEP("sha256"); +MODULE_SOFTDEP("sha512"); +MODULE_SOFTDEP("aead2"); +MODULE_SOFTDEP("ccm"); +MODULE_SOFTDEP("gcm"); module_init(init_cifs) module_exit(exit_cifs) diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 4b21a90015a9..b87456bae1a1 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -108,6 +108,7 @@ extern ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to); extern ssize_t cifs_user_writev(struct kiocb *iocb, struct iov_iter *from); extern ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from); extern ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from); +extern int cifs_flock(struct file *pfile, int cmd, struct file_lock *plock); extern int cifs_lock(struct file *, int, struct file_lock *); extern int cifs_fsync(struct file *, loff_t, loff_t, int); extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int); @@ -148,9 +149,12 @@ extern ssize_t cifs_file_copychunk_range(unsigned int xid, size_t len, unsigned int flags); extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); +extern void cifs_setsize(struct inode *inode, loff_t offset); +extern int cifs_truncate_page(struct address_space *mapping, loff_t from); + #ifdef CONFIG_CIFS_NFSD_EXPORT extern const struct export_operations cifs_export_ops; #endif /* CONFIG_CIFS_NFSD_EXPORT */ -#define CIFS_VERSION "2.21" +#define CIFS_VERSION "2.25" #endif /* _CIFSFS_H */ diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index fe610e7e3670..de82cfa44b1a 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -230,7 +230,8 @@ struct smb_version_operations { bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); /* setup request: allocate mid, sign message */ struct mid_q_entry *(*setup_request)(struct cifs_ses *, - struct smb_rqst *); + struct TCP_Server_Info *, + struct smb_rqst *); /* setup async request: allocate mid, sign message */ struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, struct smb_rqst *); @@ -268,8 +269,9 @@ struct smb_version_operations { int (*check_message)(char *, unsigned int, struct TCP_Server_Info *); bool (*is_oplock_break)(char *, struct TCP_Server_Info *); int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *); - void (*downgrade_oplock)(struct TCP_Server_Info *, - struct cifsInodeInfo *, bool); + void (*downgrade_oplock)(struct TCP_Server_Info *server, + struct cifsInodeInfo *cinode, __u32 oplock, + unsigned int epoch, bool *purge_cache); /* process transaction2 response */ bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *, char *, int); @@ -296,7 +298,8 @@ struct smb_version_operations { const char *, struct dfs_info3_param **, unsigned int *, const struct nls_table *, int); /* informational QFS call */ - void (*qfs_tcon)(const unsigned int, struct cifs_tcon *); + void (*qfs_tcon)(const unsigned int, struct cifs_tcon *, + struct cifs_sb_info *); /* check if a path is accessible or not */ int (*is_path_accessible)(const unsigned int, struct cifs_tcon *, struct cifs_sb_info *, const char *); @@ -331,8 +334,9 @@ struct smb_version_operations { umode_t mode, struct cifs_tcon *tcon, const char *full_path, struct cifs_sb_info *cifs_sb); - int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *, - struct cifs_sb_info *); + int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode, + struct cifs_tcon *tcon, const char *name, + struct cifs_sb_info *sb); /* set info on created directory */ void (*mkdir_setinfo)(struct inode *, const char *, struct cifs_sb_info *, struct cifs_tcon *, @@ -365,6 +369,9 @@ struct smb_version_operations { /* close a file */ void (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); + /* close a file, returning file attributes and timestamps */ + void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon, + struct cifsFileInfo *pfile_info); /* send a flush request to the server */ int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); /* async read from the server */ @@ -403,7 +410,7 @@ struct smb_version_operations { struct cifsInodeInfo *); /* query remote filesystem */ int (*queryfs)(const unsigned int, struct cifs_tcon *, - struct kstatfs *); + struct cifs_sb_info *, struct kstatfs *); /* send mandatory brlock to the server */ int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, __u64, __u32, int, int, bool); @@ -424,6 +431,8 @@ struct smb_version_operations { struct cifsFileInfo *src_file); int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *src_file, void __user *); + int (*notify)(const unsigned int xid, struct file *pfile, + void __user *pbuf); int (*query_mf_symlink)(unsigned int, struct cifs_tcon *, struct cifs_sb_info *, const unsigned char *, char *, unsigned int *); @@ -484,6 +493,7 @@ struct smb_version_operations { /* ioctl passthrough for query_info */ int (*ioctl_query_info)(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_sb_info *cifs_sb, __le16 *path, int is_dir, unsigned long p); /* make unix special files (block, char, fifo, socket) */ @@ -542,6 +552,7 @@ struct smb_vol { umode_t dir_mode; enum securityEnum sectype; /* sectype requested via mnt opts */ bool sign; /* was signing requested via mnt opts? */ + bool ignore_signature:1; bool retry:1; bool intr:1; bool setuids:1; @@ -559,6 +570,8 @@ struct smb_vol { bool server_ino:1; /* use inode numbers from server ie UniqueId */ bool direct_io:1; bool strict_io:1; /* strict cache behavior */ + bool cache_ro:1; + bool cache_rw:1; bool remap:1; /* set to remap seven reserved chars in filenames */ bool sfu_remap:1; /* remap seven reserved chars ala SFU */ bool posix_paths:1; /* unset to not ask for posix pathnames. */ @@ -576,6 +589,7 @@ struct smb_vol { bool noblocksnd:1; bool noautotune:1; bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ + bool no_lease:1; /* disable requesting leases */ bool fsc:1; /* enable fscache */ bool mfsymlinks:1; /* use Minshall+French Symlinks */ bool multiuser:1; @@ -586,9 +600,14 @@ struct smb_vol { bool resilient:1; /* noresilient not required since not fored for CA */ bool domainauto:1; bool rdma:1; + bool multichannel:1; + bool use_client_guid:1; + /* reuse existing guid for multichannel */ + u8 client_guid[SMB2_CLIENT_GUID_SIZE]; unsigned int bsize; unsigned int rsize; unsigned int wsize; + unsigned int min_offload; bool sockopt_tcp_nodelay:1; unsigned long actimeo; /* attribute cache timeout (jiffies) */ struct smb_version_operations *ops; @@ -601,7 +620,9 @@ struct smb_vol { __u64 snapshot_time; /* needed for timewarp tokens */ __u32 handle_timeout; /* persistent and durable handle timeout in ms */ unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */ + unsigned int max_channels; __u16 compression; /* compression algorithm 0xFFFF default 0=disabled */ + bool rootfs:1; /* if it's a SMB root file system */ }; /** @@ -620,7 +641,8 @@ struct smb_vol { CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \ CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \ CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \ - CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID) + CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \ + CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE) /** * Generic VFS superblock mount flags (s_flags) to consider when @@ -672,12 +694,14 @@ struct TCP_Server_Info { unsigned int credits; /* send no more requests at once */ unsigned int max_credits; /* can override large 32000 default at mnt */ unsigned int in_flight; /* number of requests on the wire to server */ + unsigned int max_in_flight; /* max number of requests that were on wire */ spinlock_t req_lock; /* protect the two values above */ struct mutex srv_mutex; struct task_struct *tsk; char server_GUID[16]; __u16 sec_mode; bool sign; /* is signing enabled on this connection? */ + bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */ bool session_estab; /* mark when very first sess is established */ int echo_credits; /* echo reserved slots */ int oplock_credits; /* oplock break reserved slots */ @@ -726,12 +750,12 @@ struct TCP_Server_Info { /* Total size of this PDU. Only valid from cifs_demultiplex_thread */ unsigned int pdu_size; unsigned int total_read; /* total amount of data read in this pass */ + atomic_t in_send; /* requests trying to send */ + atomic_t num_waiters; /* blocked waiting to get in sendrecv */ #ifdef CONFIG_CIFS_FSCACHE struct fscache_cookie *fscache; /* client index cache cookie */ #endif #ifdef CONFIG_CIFS_STATS2 - atomic_t in_send; /* requests trying to send */ - atomic_t num_waiters; /* blocked waiting to get in sendrecv */ atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */ atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */ __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */ @@ -740,6 +764,7 @@ struct TCP_Server_Info { #endif /* STATS2 */ unsigned int max_read; unsigned int max_write; + unsigned int min_offload; __le16 compress_algorithm; __le16 cipher_type; /* save initital negprot hash */ @@ -755,6 +780,8 @@ struct TCP_Server_Info { * reconnect. */ int nr_targets; + bool noblockcnt; /* use non-blocking connect() */ + bool is_channel; /* if a session channel */ }; struct cifs_credits { @@ -941,6 +968,11 @@ struct cifs_server_iface { struct sockaddr_storage sockaddr; }; +struct cifs_chan { + struct TCP_Server_Info *server; + __u8 signkey[SMB3_SIGN_KEY_SIZE]; +}; + /* * Session structure. One of these for each uid session with a particular host */ @@ -971,12 +1003,15 @@ struct cifs_ses { bool sign; /* is signing required? */ bool need_reconnect:1; /* connection reset, uid now invalid */ bool domainAuto:1; + bool binding:1; /* are we binding the session? */ __u16 session_flags; __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE]; __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE]; __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; + __u8 binding_preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE]; + /* * Network interfaces available on the server this session is * connected to. @@ -990,8 +1025,37 @@ struct cifs_ses { struct cifs_server_iface *iface_list; size_t iface_count; unsigned long iface_last_update; /* jiffies */ + +#define CIFS_MAX_CHANNELS 16 + struct cifs_chan chans[CIFS_MAX_CHANNELS]; + size_t chan_count; + size_t chan_max; + atomic_t chan_seq; /* round robin state */ }; +/* + * When binding a new channel, we need to access the channel which isn't fully + * established yet (one past the established count) + */ + +static inline +struct cifs_chan *cifs_ses_binding_channel(struct cifs_ses *ses) +{ + if (ses->binding) + return &ses->chans[ses->chan_count]; + else + return NULL; +} + +static inline +struct TCP_Server_Info *cifs_ses_server(struct cifs_ses *ses) +{ + if (ses->binding) + return ses->chans[ses->chan_count].server; + else + return ses->server; +} + static inline bool cap_unix(struct cifs_ses *ses) { @@ -1001,7 +1065,7 @@ cap_unix(struct cifs_ses *ses) struct cached_fid { bool is_valid:1; /* Do we have a useable root fid */ bool file_all_info_is_valid:1; - + bool has_lease:1; struct kref refcount; struct cifs_fid *fid; struct mutex fid_mutex; @@ -1082,6 +1146,7 @@ struct cifs_tcon { bool need_reopen_files:1; /* need to reopen tcon file handles */ bool use_resilient:1; /* use resilient instead of durable handles */ bool use_persistent:1; /* use persistent instead of durable handles */ + bool no_lease:1; /* Do not request leases on files or directories */ __le32 capabilities; __u32 share_flags; __u32 maximal_access; @@ -1197,6 +1262,7 @@ struct cifs_search_info { bool smallBuf:1; /* so we know which buf_release function to call */ }; +#define ACL_NO_MODE ((umode_t)(-1)) struct cifs_open_parms { struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb; @@ -1246,11 +1312,14 @@ struct cifsFileInfo { unsigned int f_flags; bool invalidHandle:1; /* file closed via session abend */ bool oplock_break_cancelled:1; + unsigned int oplock_epoch; /* epoch from the lease break */ + __u32 oplock_level; /* oplock/lease level from the lease break */ int count; spinlock_t file_info_lock; /* protects four flag/count fields above */ struct mutex fh_mutex; /* prevents reopen race after dead ses*/ struct cifs_search_info srch_inf; struct work_struct oplock_break; /* work for oplock breaks */ + struct work_struct put; /* work for the final part of _put */ }; struct cifs_io_parms { @@ -1356,7 +1425,8 @@ cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file) } struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file); -void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr); +void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr, + bool offload); void cifsFileInfo_put(struct cifsFileInfo *cifs_file); #define CIFS_CACHE_READ_FLG 1 @@ -1366,9 +1436,9 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file); #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG) #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG) -#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG) +#define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)) #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG) -#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG) +#define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)) /* * One of these for each file inode @@ -1377,6 +1447,11 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file); struct cifsInodeInfo { bool can_cache_brlcks; struct list_head llist; /* locks helb by this inode */ + /* + * NOTE: Some code paths call down_read(lock_sem) twice, so + * we must always use use cifs_down_write() instead of down_write() + * for this semaphore to avoid deadlocks. + */ struct rw_semaphore lock_sem; /* protect the fields above */ /* BB add in lists for dirty pages i.e. write caching info for oplock */ struct list_head openFileList; @@ -1386,7 +1461,7 @@ struct cifsInodeInfo { unsigned int epoch; /* used to track lease state changes */ #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */ #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */ -#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */ +#define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */ #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */ #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */ #define CIFS_INO_LOCK (5) /* lock bit for synchronization */ @@ -1505,6 +1580,7 @@ struct mid_q_entry { struct TCP_Server_Info *server; /* server corresponding to this mid */ __u64 mid; /* multiplex id */ __u16 credits; /* number of credits consumed by this mid */ + __u16 credits_received; /* number of credits from the response */ __u32 pid; /* process id */ __u32 sequence_number; /* for CIFS signing */ unsigned long when_alloc; /* when mid was created */ @@ -1516,6 +1592,7 @@ struct mid_q_entry { mid_callback_t *callback; /* call completion callback */ mid_handle_t *handle; /* call handle mid callback */ void *callback_data; /* general purpose pointer for callback */ + struct task_struct *creator; void *resp_buf; /* pointer to received SMB header */ unsigned int resp_buf_size; int mid_state; /* wish this were enum but can not pass to wait_event */ @@ -1532,12 +1609,12 @@ struct close_cancelled_open { struct cifs_fid fid; struct cifs_tcon *tcon; struct work_struct work; + __u64 mid; + __u16 cmd; }; /* Make code in transport.c a little cleaner by moving update of optional stats into function below */ -#ifdef CONFIG_CIFS_STATS2 - static inline void cifs_in_send_inc(struct TCP_Server_Info *server) { atomic_inc(&server->in_send); @@ -1558,26 +1635,12 @@ static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) atomic_dec(&server->num_waiters); } +#ifdef CONFIG_CIFS_STATS2 static inline void cifs_save_when_sent(struct mid_q_entry *mid) { mid->when_sent = jiffies; } #else -static inline void cifs_in_send_inc(struct TCP_Server_Info *server) -{ -} -static inline void cifs_in_send_dec(struct TCP_Server_Info *server) -{ -} - -static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server) -{ -} - -static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server) -{ -} - static inline void cifs_save_when_sent(struct mid_q_entry *mid) { } @@ -1635,6 +1698,7 @@ struct cifs_fattr { struct timespec64 cf_atime; struct timespec64 cf_mtime; struct timespec64 cf_ctime; + u32 cf_cifstag; }; static inline void free_dfs_info_param(struct dfs_info3_param *param) @@ -1887,6 +1951,8 @@ void cifs_queue_oplock_break(struct cifsFileInfo *cfile); extern const struct slow_work_ops cifs_oplock_break_ops; extern struct workqueue_struct *cifsiod_wq; +extern struct workqueue_struct *decrypt_wq; +extern struct workqueue_struct *fileinfo_put_wq; extern struct workqueue_struct *cifsoplockd_wq; extern __u32 cifs_lock_secret; @@ -1917,4 +1983,10 @@ extern struct smb_version_values smb302_values; #define ALT_SMB311_VERSION_STRING "3.11" extern struct smb_version_operations smb311_operations; extern struct smb_version_values smb311_values; + +static inline bool is_smb1_server(struct TCP_Server_Info *server) +{ + return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; +} + #endif /* _CIFS_GLOB_H */ diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index e23234207fc2..89eaaf46d1ca 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -109,6 +109,7 @@ extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *, extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses, char *in_buf, int flags); extern struct mid_q_entry *cifs_setup_request(struct cifs_ses *, + struct TCP_Server_Info *, struct smb_rqst *); extern struct mid_q_entry *cifs_setup_async_request(struct TCP_Server_Info *, struct smb_rqst *); @@ -137,7 +138,11 @@ extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool); extern int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only, struct cifsFileInfo **ret_file); +extern int cifs_get_writable_path(struct cifs_tcon *tcon, const char *name, + struct cifsFileInfo **ret_file); extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool); +extern int cifs_get_readable_path(struct cifs_tcon *tcon, const char *name, + struct cifsFileInfo **ret_file); extern unsigned int smbCalcSize(void *buf, struct TCP_Server_Info *server); extern int decode_negTokenInit(unsigned char *security_blob, int length, struct TCP_Server_Info *server); @@ -166,6 +171,7 @@ extern int cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, const unsigned int xid); extern int cifs_push_mandatory_locks(struct cifsFileInfo *cfile); +extern void cifs_down_write(struct rw_semaphore *sem); extern struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, struct tcon_link *tlink, @@ -197,6 +203,7 @@ extern int cifs_rename_pending_delete(const char *full_path, const unsigned int xid); extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct inode *inode, + bool get_mode_from_special_sid, const char *path, const struct cifs_fid *pfid); extern int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64, kuid_t, kgid_t); @@ -206,6 +213,8 @@ extern struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *, const struct cifs_fid *, u32 *); extern int set_cifs_acl(struct cifs_ntsd *, __u32, struct inode *, const char *, int); +extern unsigned int setup_authusers_ACE(struct cifs_ace *pace); +extern unsigned int setup_special_mode_ACE(struct cifs_ace *pace, __u64 nmode); extern void dequeue_mid(struct mid_q_entry *mid, bool malformed); extern int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, @@ -236,6 +245,7 @@ extern void cifs_add_pending_open_locked(struct cifs_fid *fid, struct tcon_link *tlink, struct cifs_pending_open *open); extern void cifs_del_pending_open(struct cifs_pending_open *open); +extern struct TCP_Server_Info *cifs_get_tcp_session(struct smb_vol *vol); extern void cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect); extern void cifs_put_tcon(struct cifs_tcon *tcon); @@ -367,7 +377,8 @@ extern int CIFSSMBUnixSetPathInfo(const unsigned int xid, const struct nls_table *nls_codepage, int remap); -extern int CIFSSMBMkDir(const unsigned int xid, struct cifs_tcon *tcon, +extern int CIFSSMBMkDir(const unsigned int xid, struct inode *inode, + umode_t mode, struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb); extern int CIFSSMBRmDir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb); @@ -577,8 +588,18 @@ void cifs_free_hash(struct crypto_shash **shash, struct sdesc **sdesc); extern void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page, unsigned int *len, unsigned int *offset); +int cifs_try_adding_channels(struct cifs_ses *ses); +int cifs_ses_add_channel(struct cifs_ses *ses, + struct cifs_server_iface *iface); +bool is_server_using_iface(struct TCP_Server_Info *server, + struct cifs_server_iface *iface); +bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface); void extract_unc_hostname(const char *unc, const char **h, size_t *len); +int copy_path_name(char *dst, const char *src); +int smb2_parse_query_directory(struct cifs_tcon *tcon, struct kvec *rsp_iov, + int resp_buftype, + struct cifs_search_info *srch_inf); #ifdef CONFIG_CIFS_DFS_UPCALL static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses, @@ -591,4 +612,12 @@ static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses, } #endif +static inline int cifs_create_options(struct cifs_sb_info *cifs_sb, int options) +{ + if (cifs_sb && (backup_cred(cifs_sb))) + return options | CREATE_OPEN_BACKUP_INTENT; + else + return options; +} + #endif /* _CIFSPROTO_H */ diff --git a/fs/cifs/cifsroot.c b/fs/cifs/cifsroot.c new file mode 100644 index 000000000000..37edbfb8e096 --- /dev/null +++ b/fs/cifs/cifsroot.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SMB root file system support + * + * Copyright (c) 2019 Paulo Alcantara <palcantara@suse.de> + */ +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/types.h> +#include <linux/ctype.h> +#include <linux/string.h> +#include <linux/root_dev.h> +#include <linux/kernel.h> +#include <linux/in.h> +#include <linux/inet.h> +#include <net/ipconfig.h> + +#define DEFAULT_MNT_OPTS \ + "vers=1.0,cifsacl,mfsymlinks,rsize=1048576,wsize=65536,uid=0,gid=0," \ + "hard,rootfs" + +static char root_dev[2048] __initdata = ""; +static char root_opts[1024] __initdata = DEFAULT_MNT_OPTS; + +static __be32 __init parse_srvaddr(char *start, char *end) +{ + /* TODO: ipv6 support */ + char addr[sizeof("aaa.bbb.ccc.ddd")]; + int i = 0; + + while (start < end && i < sizeof(addr) - 1) { + if (isdigit(*start) || *start == '.') + addr[i++] = *start; + start++; + } + addr[i] = '\0'; + return in_aton(addr); +} + +/* cifsroot=//<server-ip>/<share>[,options] */ +static int __init cifs_root_setup(char *line) +{ + char *s; + int len; + __be32 srvaddr = htonl(INADDR_NONE); + + ROOT_DEV = Root_CIFS; + + if (strlen(line) > 3 && line[0] == '/' && line[1] == '/') { + s = strchr(&line[2], '/'); + if (!s || s[1] == '\0') + return 1; + + /* make s point to ',' or '\0' at end of line */ + s = strchrnul(s, ','); + /* len is strlen(unc) + '\0' */ + len = s - line + 1; + if (len > sizeof(root_dev)) { + printk(KERN_ERR "Root-CIFS: UNC path too long\n"); + return 1; + } + strlcpy(root_dev, line, len); + srvaddr = parse_srvaddr(&line[2], s); + if (*s) { + int n = snprintf(root_opts, + sizeof(root_opts), "%s,%s", + DEFAULT_MNT_OPTS, s + 1); + if (n >= sizeof(root_opts)) { + printk(KERN_ERR "Root-CIFS: mount options string too long\n"); + root_opts[sizeof(root_opts)-1] = '\0'; + return 1; + } + } + } + + root_server_addr = srvaddr; + + return 1; +} + +__setup("cifsroot=", cifs_root_setup); + +int __init cifs_root_data(char **dev, char **opts) +{ + if (!root_dev[0] || root_server_addr == htonl(INADDR_NONE)) { + printk(KERN_ERR "Root-CIFS: no SMB server address\n"); + return -1; + } + + *dev = root_dev; + *opts = root_opts; + + return 0; +} diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index e2f95965065d..3c89569e7210 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -42,6 +42,7 @@ #include "cifsproto.h" #include "cifs_unicode.h" #include "cifs_debug.h" +#include "smb2proto.h" #include "fscache.h" #include "smbdirect.h" #ifdef CONFIG_CIFS_DFS_UPCALL @@ -112,6 +113,8 @@ cifs_mark_open_files_invalid(struct cifs_tcon *tcon) mutex_lock(&tcon->crfid.fid_mutex); tcon->crfid.is_valid = false; + /* cached handle is not valid, so SMB2_CLOSE won't be sent below */ + close_shroot_lease_locked(&tcon->crfid); memset(tcon->crfid.fid, 0, sizeof(struct cifs_fid)); mutex_unlock(&tcon->crfid.fid_mutex); @@ -257,7 +260,7 @@ cifs_reconnect_tcon(struct cifs_tcon *tcon, int smb_command) if (server->tcpStatus != CifsNeedReconnect) break; - if (--retries) + if (retries && --retries) continue; /* @@ -942,10 +945,8 @@ PsxDelete: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB add path length overrun check */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, fileName); } params = 6 + name_len; @@ -1015,10 +1016,8 @@ DelFileRetry: remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->fileName, name, name_len); + } else { + name_len = copy_path_name(pSMB->fileName, name); } pSMB->SearchAttributes = cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM); @@ -1062,10 +1061,8 @@ RmDirRetry: remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->DirName, name, name_len); + } else { + name_len = copy_path_name(pSMB->DirName, name); } pSMB->BufferFormat = 0x04; @@ -1084,7 +1081,8 @@ RmDirRetry: } int -CIFSSMBMkDir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, +CIFSSMBMkDir(const unsigned int xid, struct inode *inode, umode_t mode, + struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb) { int rc = 0; @@ -1107,10 +1105,8 @@ MkDirRetry: remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->DirName, name, name_len); + } else { + name_len = copy_path_name(pSMB->DirName, name); } pSMB->BufferFormat = 0x04; @@ -1157,10 +1153,8 @@ PsxCreat: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, name, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, name); } params = 6 + name_len; @@ -1324,11 +1318,9 @@ OldOpenRetry: fileName, PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve check for buffer overruns BB */ + } else { count = 0; /* no pad */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->fileName, fileName, name_len); + name_len = copy_path_name(pSMB->fileName, fileName); } if (*pOplock & REQ_OPLOCK) pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK); @@ -1405,7 +1397,7 @@ int CIFS_open(const unsigned int xid, struct cifs_open_parms *oparms, int *oplock, FILE_ALL_INFO *buf) { - int rc = -EACCES; + int rc; OPEN_REQ *req = NULL; OPEN_RSP *rsp = NULL; int bytes_returned; @@ -1442,11 +1434,8 @@ openRetry: /* BB improve check for buffer overruns BB */ /* no pad */ count = 0; - name_len = strnlen(path, PATH_MAX); - /* trailing null */ - name_len++; + name_len = copy_path_name(req->fileName, path); req->NameLength = cpu_to_le16(name_len); - strncpy(req->fileName, path, name_len); } if (*oplock & REQ_OPLOCK) @@ -2812,15 +2801,10 @@ renameRetry: remap); name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; name_len2 *= 2; /* convert to bytes */ - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(from_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, from_name, name_len); - name_len2 = strnlen(to_name, PATH_MAX); - name_len2++; /* trailing null */ + } else { + name_len = copy_path_name(pSMB->OldFileName, from_name); + name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, to_name); pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2); - name_len2++; /* trailing null */ name_len2++; /* signature byte */ } @@ -2962,15 +2946,10 @@ copyRetry: toName, PATH_MAX, nls_codepage, remap); name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; name_len2 *= 2; /* convert to bytes */ - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, fromName, name_len); - name_len2 = strnlen(toName, PATH_MAX); - name_len2++; /* trailing null */ + } else { + name_len = copy_path_name(pSMB->OldFileName, fromName); pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2); - name_len2++; /* trailing null */ + name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, toName); name_len2++; /* signature byte */ } @@ -3021,10 +3000,8 @@ createSymLinkRetry: name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fromName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, fromName); } params = 6 + name_len; pSMB->MaxSetupCount = 0; @@ -3044,10 +3021,8 @@ createSymLinkRetry: PATH_MAX, nls_codepage, remap); name_len_target++; /* trailing null */ name_len_target *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len_target = strnlen(toName, PATH_MAX); - name_len_target++; /* trailing null */ - strncpy(data_offset, toName, name_len_target); + } else { + name_len_target = copy_path_name(data_offset, toName); } pSMB->MaxParameterCount = cpu_to_le16(2); @@ -3109,10 +3084,8 @@ createHardLinkRetry: name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(toName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, toName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, toName); } params = 6 + name_len; pSMB->MaxSetupCount = 0; @@ -3131,10 +3104,8 @@ createHardLinkRetry: PATH_MAX, nls_codepage, remap); name_len_target++; /* trailing null */ name_len_target *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len_target = strnlen(fromName, PATH_MAX); - name_len_target++; /* trailing null */ - strncpy(data_offset, fromName, name_len_target); + } else { + name_len_target = copy_path_name(data_offset, fromName); } pSMB->MaxParameterCount = cpu_to_le16(2); @@ -3213,15 +3184,10 @@ winCreateHardLinkRetry: remap); name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; name_len2 *= 2; /* convert to bytes */ - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(from_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, from_name, name_len); - name_len2 = strnlen(to_name, PATH_MAX); - name_len2++; /* trailing null */ + } else { + name_len = copy_path_name(pSMB->OldFileName, from_name); pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2); - name_len2++; /* trailing null */ + name_len2 = copy_path_name(pSMB->OldFileName+name_len+1, to_name); name_len2++; /* signature byte */ } @@ -3271,10 +3237,8 @@ querySymLinkRetry: remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, searchName); } params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; @@ -3691,10 +3655,8 @@ queryAclRetry: name_len *= 2; pSMB->FileName[name_len] = 0; pSMB->FileName[name_len+1] = 0; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, searchName); } params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; @@ -3776,10 +3738,8 @@ setAclRetry: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, fileName); } params = 6 + name_len; pSMB->MaxParameterCount = cpu_to_le16(2); @@ -4184,9 +4144,7 @@ QInfRetry: name_len++; /* trailing null */ name_len *= 2; } else { - name_len = strnlen(search_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, search_name, name_len); + name_len = copy_path_name(pSMB->FileName, search_name); } pSMB->BufferFormat = 0x04; name_len++; /* account for buffer type byte */ @@ -4321,10 +4279,8 @@ QPathInfoRetry: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(search_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, search_name, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, search_name); } params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */; @@ -4490,10 +4446,8 @@ UnixQPathInfoRetry: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(searchName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, searchName); } params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */; @@ -4593,17 +4547,16 @@ findFirstRetry: pSMB->FileName[name_len+1] = 0; name_len += 2; } - } else { /* BB add check for overrun of SMB buf BB */ - name_len = strnlen(searchName, PATH_MAX); -/* BB fix here and in unicode clause above ie - if (name_len > buffersize-header) - free buffer exit; BB */ - strncpy(pSMB->FileName, searchName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, searchName); if (msearch) { - pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb); - pSMB->FileName[name_len+1] = '*'; - pSMB->FileName[name_len+2] = 0; - name_len += 3; + if (WARN_ON_ONCE(name_len > PATH_MAX-2)) + name_len = PATH_MAX-2; + /* overwrite nul byte */ + pSMB->FileName[name_len-1] = CIFS_DIR_SEP(cifs_sb); + pSMB->FileName[name_len] = '*'; + pSMB->FileName[name_len+1] = 0; + name_len += 2; } } @@ -4666,7 +4619,7 @@ findFirstRetry: psrch_inf->unicode = false; psrch_inf->ntwrk_buf_start = (char *)pSMBr; - psrch_inf->smallBuf = 0; + psrch_inf->smallBuf = false; psrch_inf->srch_entries_start = (char *) &pSMBr->hdr.Protocol + le16_to_cpu(pSMBr->t2.DataOffset); @@ -4800,7 +4753,7 @@ int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon, cifs_buf_release(psrch_inf->ntwrk_buf_start); psrch_inf->srch_entries_start = response_data; psrch_inf->ntwrk_buf_start = (char *)pSMB; - psrch_inf->smallBuf = 0; + psrch_inf->smallBuf = false; if (parms->EndofSearch) psrch_inf->endOfSearch = true; else @@ -4898,10 +4851,8 @@ GetInodeNumberRetry: remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(search_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, search_name, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, search_name); } params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ; @@ -5008,9 +4959,7 @@ getDFSRetry: name_len++; /* trailing null */ name_len *= 2; } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(search_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->RequestFileName, search_name, name_len); + name_len = copy_path_name(pSMB->RequestFileName, search_name); } if (ses->server->sign) @@ -5663,10 +5612,8 @@ SetEOFRetry: PATH_MAX, cifs_sb->local_nls, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(file_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, file_name, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, file_name); } params = 6 + name_len; data_count = sizeof(struct file_end_of_file_info); @@ -5959,10 +5906,8 @@ SetTimesRetry: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, fileName); } params = 6 + name_len; @@ -6040,10 +5985,8 @@ SetAttrLgcyRetry: PATH_MAX, nls_codepage); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->fileName, fileName, name_len); + } else { + name_len = copy_path_name(pSMB->fileName, fileName); } pSMB->attr = cpu_to_le16(dos_attrs); pSMB->BufferFormat = 0x04; @@ -6203,10 +6146,8 @@ setPermsRetry: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(file_name, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, file_name, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, file_name); } params = 6 + name_len; @@ -6298,10 +6239,8 @@ QAllEAsRetry: PATH_MAX, nls_codepage, remap); list_len++; /* trailing null */ list_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - list_len = strnlen(searchName, PATH_MAX); - list_len++; /* trailing null */ - strncpy(pSMB->FileName, searchName, list_len); + } else { + list_len = copy_path_name(pSMB->FileName, searchName); } params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */; @@ -6480,10 +6419,8 @@ SetEARetry: PATH_MAX, nls_codepage, remap); name_len++; /* trailing null */ name_len *= 2; - } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); - name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); + } else { + name_len = copy_path_name(pSMB->FileName, fileName); } params = 6 + name_len; diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 1795e80cbdf7..4804d1df8c1c 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -74,7 +74,7 @@ enum { Opt_user_xattr, Opt_nouser_xattr, Opt_forceuid, Opt_noforceuid, Opt_forcegid, Opt_noforcegid, - Opt_noblocksend, Opt_noautotune, + Opt_noblocksend, Opt_noautotune, Opt_nolease, Opt_hard, Opt_soft, Opt_perm, Opt_noperm, Opt_mapposix, Opt_nomapposix, Opt_mapchars, Opt_nomapchars, Opt_sfu, @@ -91,21 +91,23 @@ enum { Opt_serverino, Opt_noserverino, Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, Opt_acl, Opt_noacl, Opt_locallease, - Opt_sign, Opt_seal, Opt_noac, + Opt_sign, Opt_ignore_signature, Opt_seal, Opt_noac, Opt_fsc, Opt_mfsymlinks, Opt_multiuser, Opt_sloppy, Opt_nosharesock, Opt_persistent, Opt_nopersistent, Opt_resilient, Opt_noresilient, - Opt_domainauto, Opt_rdma, Opt_modesid, + Opt_domainauto, Opt_rdma, Opt_modesid, Opt_rootfs, + Opt_multichannel, Opt_nomultichannel, Opt_compress, /* Mount options which take numeric value */ Opt_backupuid, Opt_backupgid, Opt_uid, Opt_cruid, Opt_gid, Opt_file_mode, Opt_dirmode, Opt_port, + Opt_min_enc_offload, Opt_blocksize, Opt_rsize, Opt_wsize, Opt_actimeo, Opt_echo_interval, Opt_max_credits, Opt_handletimeout, - Opt_snapshot, + Opt_snapshot, Opt_max_channels, /* Mount options which take string value */ Opt_user, Opt_pass, Opt_ip, @@ -134,6 +136,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_noforcegid, "noforcegid" }, { Opt_noblocksend, "noblocksend" }, { Opt_noautotune, "noautotune" }, + { Opt_nolease, "nolease" }, { Opt_hard, "hard" }, { Opt_soft, "soft" }, { Opt_perm, "perm" }, @@ -183,6 +186,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_noacl, "noacl" }, { Opt_locallease, "locallease" }, { Opt_sign, "sign" }, + { Opt_ignore_signature, "signloosely" }, { Opt_seal, "seal" }, { Opt_noac, "noac" }, { Opt_fsc, "fsc" }, @@ -196,6 +200,8 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_noresilient, "noresilienthandles"}, { Opt_domainauto, "domainauto"}, { Opt_rdma, "rdma"}, + { Opt_multichannel, "multichannel" }, + { Opt_nomultichannel, "nomultichannel" }, { Opt_backupuid, "backupuid=%s" }, { Opt_backupgid, "backupgid=%s" }, @@ -206,6 +212,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_dirmode, "dirmode=%s" }, { Opt_dirmode, "dir_mode=%s" }, { Opt_port, "port=%s" }, + { Opt_min_enc_offload, "esize=%s" }, { Opt_blocksize, "bsize=%s" }, { Opt_rsize, "rsize=%s" }, { Opt_wsize, "wsize=%s" }, @@ -214,6 +221,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_echo_interval, "echo_interval=%s" }, { Opt_max_credits, "max_credits=%s" }, { Opt_snapshot, "snapshot=%s" }, + { Opt_max_channels, "max_channels=%s" }, { Opt_compress, "compress=%s" }, { Opt_blank_user, "user=" }, @@ -262,6 +270,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_ignore, "nomand" }, { Opt_ignore, "relatime" }, { Opt_ignore, "_netdev" }, + { Opt_rootfs, "rootfs" }, { Opt_err, NULL } }; @@ -298,6 +307,8 @@ enum { Opt_cache_loose, Opt_cache_strict, Opt_cache_none, + Opt_cache_ro, + Opt_cache_rw, Opt_cache_err }; @@ -305,6 +316,8 @@ static const match_table_t cifs_cacheflavor_tokens = { { Opt_cache_loose, "loose" }, { Opt_cache_strict, "strict" }, { Opt_cache_none, "none" }, + { Opt_cache_ro, "ro" }, + { Opt_cache_rw, "singleclient" }, { Opt_cache_err, NULL } }; @@ -378,7 +391,7 @@ static inline int reconn_set_ipaddr(struct TCP_Server_Info *server) #ifdef CONFIG_CIFS_DFS_UPCALL struct super_cb_data { struct TCP_Server_Info *server; - struct cifs_sb_info *cifs_sb; + struct super_block *sb; }; /* These functions must be called with server->srv_mutex held */ @@ -389,25 +402,39 @@ static void super_cb(struct super_block *sb, void *arg) struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; - if (d->cifs_sb) + if (d->sb) return; cifs_sb = CIFS_SB(sb); tcon = cifs_sb_master_tcon(cifs_sb); if (tcon->ses->server == d->server) - d->cifs_sb = cifs_sb; + d->sb = sb; } -static inline struct cifs_sb_info * -find_super_by_tcp(struct TCP_Server_Info *server) +static struct super_block *get_tcp_super(struct TCP_Server_Info *server) { struct super_cb_data d = { .server = server, - .cifs_sb = NULL, + .sb = NULL, }; iterate_supers_type(&cifs_fs_type, super_cb, &d); - return d.cifs_sb ? d.cifs_sb : ERR_PTR(-ENOENT); + + if (unlikely(!d.sb)) + return ERR_PTR(-ENOENT); + /* + * Grab an active reference in order to prevent automounts (DFS links) + * of expiring and then freeing up our cifs superblock pointer while + * we're doing failover. + */ + cifs_sb_active(d.sb); + return d.sb; +} + +static inline void put_tcp_super(struct super_block *sb) +{ + if (!IS_ERR_OR_NULL(sb)) + cifs_sb_deactive(sb); } static void reconn_inval_dfs_target(struct TCP_Server_Info *server, @@ -471,6 +498,7 @@ cifs_reconnect(struct TCP_Server_Info *server) struct mid_q_entry *mid_entry; struct list_head retry_list; #ifdef CONFIG_CIFS_DFS_UPCALL + struct super_block *sb = NULL; struct cifs_sb_info *cifs_sb = NULL; struct dfs_cache_tgt_list tgt_list = {0}; struct dfs_cache_tgt_iterator *tgt_it = NULL; @@ -480,16 +508,18 @@ cifs_reconnect(struct TCP_Server_Info *server) server->nr_targets = 1; #ifdef CONFIG_CIFS_DFS_UPCALL spin_unlock(&GlobalMid_Lock); - cifs_sb = find_super_by_tcp(server); - if (IS_ERR(cifs_sb)) { - rc = PTR_ERR(cifs_sb); + sb = get_tcp_super(server); + if (IS_ERR(sb)) { + rc = PTR_ERR(sb); cifs_dbg(FYI, "%s: will not do DFS failover: rc = %d\n", __func__, rc); - cifs_sb = NULL; + sb = NULL; } else { + cifs_sb = CIFS_SB(sb); + rc = reconn_setup_dfs_targets(cifs_sb, &tgt_list, &tgt_it); if (rc && (rc != -EOPNOTSUPP)) { - cifs_dbg(VFS, "%s: no target servers for DFS failover\n", + cifs_server_dbg(VFS, "%s: no target servers for DFS failover\n", __func__); } else { server->nr_targets = dfs_cache_get_nr_tgts(&tgt_list); @@ -503,6 +533,10 @@ cifs_reconnect(struct TCP_Server_Info *server) /* the demux thread will exit normally next time through the loop */ spin_unlock(&GlobalMid_Lock); +#ifdef CONFIG_CIFS_DFS_UPCALL + dfs_cache_free_tgts(&tgt_list); + put_tcp_super(sb); +#endif return rc; } else server->tcpStatus = CifsNeedReconnect; @@ -555,9 +589,11 @@ cifs_reconnect(struct TCP_Server_Info *server) spin_lock(&GlobalMid_Lock); list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { mid_entry = list_entry(tmp, struct mid_q_entry, qhead); + kref_get(&mid_entry->refcount); if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) mid_entry->mid_state = MID_RETRY_NEEDED; list_move(&mid_entry->qhead, &retry_list); + mid_entry->mid_flags |= MID_DELETED; } spin_unlock(&GlobalMid_Lock); mutex_unlock(&server->srv_mutex); @@ -567,6 +603,7 @@ cifs_reconnect(struct TCP_Server_Info *server) mid_entry = list_entry(tmp, struct mid_q_entry, qhead); list_del_init(&mid_entry->qhead); mid_entry->callback(mid_entry); + cifs_mid_q_entry_release(mid_entry); } if (cifs_rdma_enabled(server)) { @@ -617,16 +654,19 @@ cifs_reconnect(struct TCP_Server_Info *server) rc = dfs_cache_noreq_update_tgthint(cifs_sb->origin_fullpath + 1, tgt_it); if (rc) { - cifs_dbg(VFS, "%s: failed to update DFS target hint: rc = %d\n", + cifs_server_dbg(VFS, "%s: failed to update DFS target hint: rc = %d\n", __func__, rc); } rc = dfs_cache_update_vol(cifs_sb->origin_fullpath, server); if (rc) { - cifs_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n", + cifs_server_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n", __func__, rc); } dfs_cache_free_tgts(&tgt_list); + } + + put_tcp_super(sb); #endif if (server->tcpStatus == CifsNeedNegotiate) mod_delayed_work(cifsiod_wq, &server->echo, 0); @@ -678,7 +718,7 @@ allocate_buffers(struct TCP_Server_Info *server) if (!server->bigbuf) { server->bigbuf = (char *)cifs_buf_get(); if (!server->bigbuf) { - cifs_dbg(VFS, "No memory for large SMB response\n"); + cifs_server_dbg(VFS, "No memory for large SMB response\n"); msleep(3000); /* retry will check if exiting */ return false; @@ -691,7 +731,7 @@ allocate_buffers(struct TCP_Server_Info *server) if (!server->smallbuf) { server->smallbuf = (char *)cifs_small_buf_get(); if (!server->smallbuf) { - cifs_dbg(VFS, "No memory for SMB response\n"); + cifs_server_dbg(VFS, "No memory for SMB response\n"); msleep(1000); /* retry will check if exiting */ return false; @@ -712,7 +752,7 @@ server_unresponsive(struct TCP_Server_Info *server) * We need to wait 3 echo intervals to make sure we handle such * situations right: * 1s client sends a normal SMB request - * 3s client gets a response + * 2s client gets a response * 30s echo workqueue job pops, and decides we got a response recently * and don't need to send another * ... @@ -722,8 +762,8 @@ server_unresponsive(struct TCP_Server_Info *server) if ((server->tcpStatus == CifsGood || server->tcpStatus == CifsNeedNegotiate) && time_after(jiffies, server->lstrp + 3 * server->echo_interval)) { - cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", - server->hostname, (3 * server->echo_interval) / HZ); + cifs_server_dbg(VFS, "has not responded in %lu seconds. Reconnecting...\n", + (3 * server->echo_interval) / HZ); cifs_reconnect(server); wake_up(&server->response_q); return true; @@ -861,7 +901,7 @@ is_smb_response(struct TCP_Server_Info *server, unsigned char type) wake_up(&server->response_q); break; default: - cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); + cifs_server_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); cifs_reconnect(server); } @@ -886,11 +926,27 @@ dequeue_mid(struct mid_q_entry *mid, bool malformed) if (mid->mid_flags & MID_DELETED) printk_once(KERN_WARNING "trying to dequeue a deleted mid\n"); - else + else { list_del_init(&mid->qhead); + mid->mid_flags |= MID_DELETED; + } spin_unlock(&GlobalMid_Lock); } +static unsigned int +smb2_get_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) +{ + struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; + + /* + * SMB1 does not use credits. + */ + if (server->vals->header_preamble_size) + return 0; + + return le16_to_cpu(shdr->CreditRequest); +} + static void handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, char *buf, int malformed) @@ -898,6 +954,7 @@ handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, if (server->ops->check_trans2 && server->ops->check_trans2(mid, server, buf, malformed)) return; + mid->credits_received = smb2_get_credits_from_hdr(buf, server); mid->resp_buf = buf; mid->large_buf = server->large_buf; /* Was previous buf put in mpx struct for multi-rsp? */ @@ -957,8 +1014,10 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server) list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { mid_entry = list_entry(tmp, struct mid_q_entry, qhead); cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); + kref_get(&mid_entry->refcount); mid_entry->mid_state = MID_SHUTDOWN; list_move(&mid_entry->qhead, &dispose_list); + mid_entry->mid_flags |= MID_DELETED; } spin_unlock(&GlobalMid_Lock); @@ -968,6 +1027,7 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server) cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); list_del_init(&mid_entry->qhead); mid_entry->callback(mid_entry); + cifs_mid_q_entry_release(mid_entry); } /* 1/8th of sec is more than enough time for them to exit */ msleep(125); @@ -1008,7 +1068,7 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) /* make sure this will fit in a large buffer */ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - server->vals->header_preamble_size) { - cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); + cifs_server_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); cifs_reconnect(server); wake_up(&server->response_q); return -ECONNABORTED; @@ -1149,7 +1209,7 @@ next_pdu: /* make sure we have enough to get to the MID */ if (server->pdu_size < HEADER_SIZE(server) - 1 - server->vals->header_preamble_size) { - cifs_dbg(VFS, "SMB response too short (%u bytes)\n", + cifs_server_dbg(VFS, "SMB response too short (%u bytes)\n", server->pdu_size); cifs_reconnect(server); wake_up(&server->response_q); @@ -1205,12 +1265,6 @@ next_pdu: for (i = 0; i < num_mids; i++) { if (mids[i] != NULL) { mids[i]->resp_buf_size = server->pdu_size; - if ((mids[i]->mid_flags & MID_WAIT_CANCELLED) && - mids[i]->mid_state == MID_RESPONSE_RECEIVED && - server->ops->handle_cancelled_mid) - server->ops->handle_cancelled_mid( - mids[i]->resp_buf, - server); if (!mids[i]->multiRsp || mids[i]->multiEnd) mids[i]->callback(mids[i]); @@ -1222,7 +1276,7 @@ next_pdu: smb2_add_credits_from_hdr(bufs[i], server); cifs_dbg(FYI, "Received oplock break\n"); } else { - cifs_dbg(VFS, "No task to wake, unknown frame " + cifs_server_dbg(VFS, "No task to wake, unknown frame " "received! NumMids %d\n", atomic_read(&midCount)); cifs_dump_mem("Received Data is: ", bufs[i], @@ -1418,14 +1472,32 @@ cifs_parse_cache_flavor(char *value, struct smb_vol *vol) case Opt_cache_loose: vol->direct_io = false; vol->strict_io = false; + vol->cache_ro = false; + vol->cache_rw = false; break; case Opt_cache_strict: vol->direct_io = false; vol->strict_io = true; + vol->cache_ro = false; + vol->cache_rw = false; break; case Opt_cache_none: vol->direct_io = true; vol->strict_io = false; + vol->cache_ro = false; + vol->cache_rw = false; + break; + case Opt_cache_ro: + vol->direct_io = false; + vol->strict_io = false; + vol->cache_ro = true; + vol->cache_rw = false; + break; + case Opt_cache_rw: + vol->direct_io = false; + vol->strict_io = false; + vol->cache_ro = false; + vol->cache_rw = true; break; default: cifs_dbg(VFS, "bad cache= option: %s\n", value); @@ -1637,6 +1709,10 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; + /* default to no multichannel (single server connection) */ + vol->multichannel = false; + vol->max_channels = 1; + if (!mountdata) goto cifs_parse_mount_err; @@ -1713,6 +1789,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_noautotune: vol->noautotune = 1; break; + case Opt_nolease: + vol->no_lease = 1; + break; case Opt_hard: vol->retry = 1; break; @@ -1748,6 +1827,11 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_nodfs: vol->nodfs = 1; break; + case Opt_rootfs: +#ifdef CONFIG_CIFS_ROOT + vol->rootfs = true; +#endif + break; case Opt_posixpaths: vol->posix_paths = 1; break; @@ -1855,6 +1939,10 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_sign: vol->sign = true; break; + case Opt_ignore_signature: + vol->sign = true; + vol->ignore_signature = true; + break; case Opt_seal: /* we do not do the following in secFlags because seal * is a per tree connection (mount) not a per socket @@ -1918,6 +2006,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_rdma: vol->rdma = true; break; + case Opt_multichannel: + vol->multichannel = true; + break; + case Opt_nomultichannel: + vol->multichannel = false; + break; case Opt_compress: vol->compression = UNKNOWN_TYPE; cifs_dbg(VFS, @@ -1989,6 +2083,13 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, } port = (unsigned short)option; break; + case Opt_min_enc_offload: + if (get_option_ul(args, &option)) { + cifs_dbg(VFS, "Invalid minimum encrypted read offload size (esize)\n"); + goto cifs_parse_mount_err; + } + vol->min_offload = option; + break; case Opt_blocksize: if (get_option_ul(args, &option)) { cifs_dbg(VFS, "%s: Invalid blocksize value\n", @@ -2074,6 +2175,15 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, } vol->max_credits = option; break; + case Opt_max_channels: + if (get_option_ul(args, &option) || option < 1 || + option > CIFS_MAX_CHANNELS) { + cifs_dbg(VFS, "%s: Invalid max_channels value, needs to be 1-%d\n", + __func__, CIFS_MAX_CHANNELS); + goto cifs_parse_mount_err; + } + vol->max_channels = option; + break; /* String Arguments */ @@ -2586,6 +2696,12 @@ static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) if (server->rdma != vol->rdma) return 0; + if (server->ignore_signature != vol->ignore_signature) + return 0; + + if (server->min_offload != vol->min_offload) + return 0; + return 1; } @@ -2596,7 +2712,11 @@ cifs_find_tcp_session(struct smb_vol *vol) spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { - if (!match_server(server, vol)) + /* + * Skip ses channels since they're only handled in lower layers + * (e.g. cifs_send_recv). + */ + if (server->is_channel || !match_server(server, vol)) continue; ++server->srv_count; @@ -2653,7 +2773,7 @@ cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect) send_sig(SIGKILL, task, 1); } -static struct TCP_Server_Info * +struct TCP_Server_Info * cifs_get_tcp_session(struct smb_vol *volume_info) { struct TCP_Server_Info *tcp_ses = NULL; @@ -2681,11 +2801,13 @@ cifs_get_tcp_session(struct smb_vol *volume_info) goto out_err_crypto_release; } - tcp_ses->noblocksnd = volume_info->noblocksnd; + tcp_ses->noblockcnt = volume_info->rootfs; + tcp_ses->noblocksnd = volume_info->noblocksnd || volume_info->rootfs; tcp_ses->noautotune = volume_info->noautotune; tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; tcp_ses->rdma = volume_info->rdma; tcp_ses->in_flight = 0; + tcp_ses->max_in_flight = 0; tcp_ses->credits = 1; init_waitqueue_head(&tcp_ses->response_q); init_waitqueue_head(&tcp_ses->request_q); @@ -2710,7 +2832,11 @@ cifs_get_tcp_session(struct smb_vol *volume_info) sizeof(tcp_ses->srcaddr)); memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, sizeof(tcp_ses->dstaddr)); - generate_random_uuid(tcp_ses->client_guid); + if (volume_info->use_client_guid) + memcpy(tcp_ses->client_guid, volume_info->client_guid, + SMB2_CLIENT_GUID_SIZE); + else + generate_random_uuid(tcp_ses->client_guid); /* * at this point we are the only ones with the pointer * to the struct since the kernel thread not created yet @@ -2760,10 +2886,11 @@ smbd_connected: module_put(THIS_MODULE); goto out_err_crypto_release; } + tcp_ses->min_offload = volume_info->min_offload; tcp_ses->tcpStatus = CifsNeedNegotiate; tcp_ses->nr_targets = 1; - + tcp_ses->ignore_signature = volume_info->ignore_signature; /* thread spawned, put it on the list */ spin_lock(&cifs_tcp_ses_lock); list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); @@ -2798,6 +2925,13 @@ static int match_session(struct cifs_ses *ses, struct smb_vol *vol) vol->sectype != ses->sectype) return 0; + /* + * If an existing session is limited to less channels than + * requested, it should not be reused + */ + if (ses->chan_max < vol->max_channels) + return 0; + switch (ses->sectype) { case Kerberos: if (!uid_eq(vol->cred_uid, ses->cred_uid)) @@ -2840,16 +2974,17 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) struct nls_table *nls_codepage; char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0}; bool seal = false; + struct TCP_Server_Info *server = ses->server; /* * If the mount request that resulted in the creation of the * session requires encryption, force IPC to be encrypted too. */ if (volume_info->seal) { - if (ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) + if (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) seal = true; else { - cifs_dbg(VFS, + cifs_server_dbg(VFS, "IPC: server doesn't support encryption\n"); return -EOPNOTSUPP; } @@ -2859,7 +2994,7 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) if (tcon == NULL) return -ENOMEM; - scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->server->hostname); + scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", server->hostname); /* cannot fail */ nls_codepage = load_nls_default(); @@ -2868,11 +3003,11 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info) tcon->ses = ses; tcon->ipc = true; tcon->seal = seal; - rc = ses->server->ops->tree_connect(xid, ses, unc, tcon, nls_codepage); + rc = server->ops->tree_connect(xid, ses, unc, tcon, nls_codepage); free_xid(xid); if (rc) { - cifs_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc); + cifs_server_dbg(VFS, "failed to connect to IPC (rc=%d)\n", rc); tconInfoFree(tcon); goto out; } @@ -2958,7 +3093,7 @@ void cifs_put_smb_ses(struct cifs_ses *ses) xid = get_xid(); rc = server->ops->logoff(xid, ses); if (rc) - cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", + cifs_server_dbg(VFS, "%s: Session Logoff failure rc=%d\n", __func__, rc); _free_xid(xid); } @@ -2967,6 +3102,14 @@ void cifs_put_smb_ses(struct cifs_ses *ses) list_del_init(&ses->smb_ses_list); spin_unlock(&cifs_tcp_ses_lock); + /* close any extra channels */ + if (ses->chan_count > 1) { + int i; + + for (i = 1; i < ses->chan_count; i++) + cifs_put_tcp_session(ses->chans[i].server, 0); + } + sesInfoFree(ses); cifs_put_tcp_session(server, 0); } @@ -2981,6 +3124,7 @@ static int cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) { int rc = 0; + int is_domain = 0; const char *delim, *payload; char *desc; ssize_t len; @@ -3028,6 +3172,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) rc = PTR_ERR(key); goto out_err; } + is_domain = 1; } down_read(&key->sem); @@ -3085,6 +3230,26 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) goto out_key_put; } + /* + * If we have a domain key then we must set the domainName in the + * for the request. + */ + if (is_domain && ses->domainName) { + vol->domainname = kstrndup(ses->domainName, + strlen(ses->domainName), + GFP_KERNEL); + if (!vol->domainname) { + cifs_dbg(FYI, "Unable to allocate %zd bytes for " + "domain\n", len); + rc = -ENOMEM; + kfree(vol->username); + vol->username = NULL; + kzfree(vol->password); + vol->password = NULL; + goto out_key_put; + } + } + out_key_put: up_read(&key->sem); key_put(key); @@ -3190,16 +3355,26 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) ses->sectype = volume_info->sectype; ses->sign = volume_info->sign; - mutex_lock(&ses->session_mutex); + + /* add server as first channel */ + ses->chans[0].server = server; + ses->chan_count = 1; + ses->chan_max = volume_info->multichannel ? volume_info->max_channels:1; + rc = cifs_negotiate_protocol(xid, ses); if (!rc) rc = cifs_setup_session(xid, ses, volume_info->local_nls); + + /* each channel uses a different signing key */ + memcpy(ses->chans[0].signkey, ses->smb3signingkey, + sizeof(ses->smb3signingkey)); + mutex_unlock(&ses->session_mutex); if (rc) goto get_ses_fail; - /* success, put it on the list */ + /* success, put it on the list and add it as first channel */ spin_lock(&cifs_tcp_ses_lock); list_add(&ses->smb_ses_list, &server->smb_ses_list); spin_unlock(&cifs_tcp_ses_lock); @@ -3228,6 +3403,8 @@ static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info) return 0; if (tcon->handle_timeout != volume_info->handle_timeout) return 0; + if (tcon->no_lease != volume_info->no_lease) + return 0; return 1; } @@ -3433,6 +3610,14 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) tcon->use_resilient = true; } + /* If the user really knows what they are doing they can override */ + if (tcon->share_flags & SMB2_SHAREFLAG_NO_CACHING) { + if (volume_info->cache_ro) + cifs_dbg(VFS, "cache=ro requested on mount but NO_CACHING flag set on share\n"); + else if (volume_info->cache_rw) + cifs_dbg(VFS, "cache=singleclient requested on mount but NO_CACHING flag set on share\n"); + } + /* * We can have only one retry value for a connection to a share so for * resources mounted more than once to the same server share the last @@ -3442,6 +3627,7 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) tcon->nocase = volume_info->nocase; tcon->nohandlecache = volume_info->nohandlecache; tcon->local_lease = volume_info->local_lease; + tcon->no_lease = volume_info->no_lease; INIT_LIST_HEAD(&tcon->pending_opens); spin_lock(&cifs_tcp_ses_lock); @@ -3523,8 +3709,10 @@ match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data) { struct cifs_sb_info *old = CIFS_SB(sb); struct cifs_sb_info *new = mnt_data->cifs_sb; - bool old_set = old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; - bool new_set = new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH; + bool old_set = (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) && + old->prepath; + bool new_set = (new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) && + new->prepath; if (old_set && new_set && !strcmp(new->prepath, old->prepath)) return 1; @@ -3637,10 +3825,10 @@ bind_socket(struct TCP_Server_Info *server) saddr4 = (struct sockaddr_in *)&server->srcaddr; saddr6 = (struct sockaddr_in6 *)&server->srcaddr; if (saddr6->sin6_family == AF_INET6) - cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", + cifs_server_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", &saddr6->sin6_addr, rc); else - cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", + cifs_server_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", &saddr4->sin_addr.s_addr, rc); } } @@ -3744,7 +3932,7 @@ generic_ip_connect(struct TCP_Server_Info *server) rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, IPPROTO_TCP, &socket, 1); if (rc < 0) { - cifs_dbg(VFS, "Error %d creating socket\n", rc); + cifs_server_dbg(VFS, "Error %d creating socket\n", rc); server->ssocket = NULL; return rc; } @@ -3792,7 +3980,15 @@ generic_ip_connect(struct TCP_Server_Info *server) socket->sk->sk_sndbuf, socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); - rc = socket->ops->connect(socket, saddr, slen, 0); + rc = socket->ops->connect(socket, saddr, slen, + server->noblockcnt ? O_NONBLOCK : 0); + /* + * When mounting SMB root file systems, we do not want to block in + * connect. Otherwise bail out and then let cifs_reconnect() perform + * reconnect failover - if possible. + */ + if (server->noblockcnt && rc == -EINPROGRESS) + rc = 0; if (rc < 0) { cifs_dbg(FYI, "Error %d connecting to server\n", rc); sock_release(socket); @@ -3955,7 +4151,7 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, cifs_sb->mnt_gid = pvolume_info->linux_gid; cifs_sb->mnt_file_mode = pvolume_info->file_mode; cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; - cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", + cifs_dbg(FYI, "file mode: %04ho dir mode: %04ho\n", cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); cifs_sb->actimeo = pvolume_info->actimeo; @@ -4018,6 +4214,14 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, cifs_dbg(FYI, "mounting share using direct i/o\n"); cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; } + if (pvolume_info->cache_ro) { + cifs_dbg(VFS, "mounting share with read only caching. Ensure that the share will not be modified while in use.\n"); + cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RO_CACHE; + } else if (pvolume_info->cache_rw) { + cifs_dbg(VFS, "mounting share in single client RW caching mode. Ensure that no other systems will be accessing the share.\n"); + cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_RO_CACHE | + CIFS_MOUNT_RW_CACHE); + } if (pvolume_info->mfsymlinks) { if (pvolume_info->sfu_emul) { /* @@ -4128,7 +4332,7 @@ static int mount_get_conns(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, if ((vol->persistent == true) && (!(ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES))) { - cifs_dbg(VFS, "persistent handles not supported by server\n"); + cifs_server_dbg(VFS, "persistent handles not supported by server\n"); return -EOPNOTSUPP; } @@ -4160,8 +4364,18 @@ static int mount_get_conns(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, tcon->unix_ext = 0; /* server does not support them */ /* do not care if a following call succeed - informational */ - if (!tcon->pipe && server->ops->qfs_tcon) - server->ops->qfs_tcon(*xid, tcon); + if (!tcon->pipe && server->ops->qfs_tcon) { + server->ops->qfs_tcon(*xid, tcon, cifs_sb); + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) { + if (tcon->fsDevInfo.DeviceCharacteristics & + cpu_to_le32(FILE_READ_ONLY_DEVICE)) + cifs_dbg(VFS, "mounted to read only share\n"); + else if ((cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_RW_CACHE) == 0) + cifs_dbg(VFS, "read only mount of RW share\n"); + /* no need to log a RW mount of a typical RW share */ + } + } cifs_sb->wsize = server->ops->negotiate_wsize(tcon, vol); cifs_sb->rsize = server->ops->negotiate_rsize(tcon, vol); @@ -4209,16 +4423,19 @@ build_unc_path_to_root(const struct smb_vol *vol, strlen(vol->prepath) + 1 : 0; unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); + if (unc_len > MAX_TREE_SIZE) + return ERR_PTR(-EINVAL); + full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); if (full_path == NULL) return ERR_PTR(-ENOMEM); - strncpy(full_path, vol->UNC, unc_len); + memcpy(full_path, vol->UNC, unc_len); pos = full_path + unc_len; if (pplen) { *pos = CIFS_DIR_SEP(cifs_sb); - strncpy(pos + 1, vol->prepath, pplen); + memcpy(pos + 1, vol->prepath, pplen); pos += pplen; } @@ -4332,7 +4549,7 @@ static int setup_dfs_tgt_conn(const char *path, int rc; struct dfs_info3_param ref = {0}; char *mdata = NULL, *fake_devname = NULL; - struct smb_vol fake_vol = {0}; + struct smb_vol fake_vol = {NULL}; cifs_dbg(FYI, "%s: dfs path: %s\n", __func__, path); @@ -4563,7 +4780,7 @@ static int is_path_remote(struct cifs_sb_info *cifs_sb, struct smb_vol *vol, rc = cifs_are_all_path_components_accessible(server, xid, tcon, cifs_sb, full_path, tcon->Flags & SMB_SHARE_IS_IN_DFS); if (rc != 0) { - cifs_dbg(VFS, "cannot query dirs between root and final path, " + cifs_server_dbg(VFS, "cannot query dirs between root and final path, " "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; rc = 0; @@ -4575,6 +4792,17 @@ static int is_path_remote(struct cifs_sb_info *cifs_sb, struct smb_vol *vol, } #ifdef CONFIG_CIFS_DFS_UPCALL +static inline void set_root_tcon(struct cifs_sb_info *cifs_sb, + struct cifs_tcon *tcon, + struct cifs_tcon **root) +{ + spin_lock(&cifs_tcp_ses_lock); + tcon->tc_count++; + tcon->remap = cifs_remap(cifs_sb); + spin_unlock(&cifs_tcp_ses_lock); + *root = tcon; +} + int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) { int rc = 0; @@ -4676,18 +4904,10 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) /* Cache out resolved root server */ (void)dfs_cache_find(xid, ses, cifs_sb->local_nls, cifs_remap(cifs_sb), root_path + 1, NULL, NULL); - /* - * Save root tcon for additional DFS requests to update or create a new - * DFS cache entry, or even perform DFS failover. - */ - spin_lock(&cifs_tcp_ses_lock); - tcon->tc_count++; - tcon->dfs_path = root_path; + kfree(root_path); root_path = NULL; - tcon->remap = cifs_remap(cifs_sb); - spin_unlock(&cifs_tcp_ses_lock); - root_tcon = tcon; + set_root_tcon(cifs_sb, tcon, &root_tcon); for (count = 1; ;) { if (!rc && tcon) { @@ -4724,6 +4944,15 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) mount_put_conns(cifs_sb, xid, server, ses, tcon); rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon); + /* + * Ensure that DFS referrals go through new root server. + */ + if (!rc && tcon && + (tcon->share_flags & (SHI1005_FLAGS_DFS | + SHI1005_FLAGS_DFS_ROOT))) { + cifs_put_tcon(root_tcon); + set_root_tcon(cifs_sb, tcon, &root_tcon); + } } if (rc) { if (rc == -EACCES || rc == -EOPNOTSUPP) @@ -4772,6 +5001,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) cifs_autodisable_serverino(cifs_sb); out: free_xid(xid); + cifs_try_adding_channels(ses); return mount_setup_tlink(cifs_sb, ses, tcon); error: @@ -5017,7 +5247,7 @@ int cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) { int rc = 0; - struct TCP_Server_Info *server = ses->server; + struct TCP_Server_Info *server = cifs_ses_server(ses); if (!server->ops->need_neg || !server->ops->negotiate) return -ENOSYS; @@ -5044,28 +5274,30 @@ cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, struct nls_table *nls_info) { int rc = -ENOSYS; - struct TCP_Server_Info *server = ses->server; - - ses->capabilities = server->capabilities; - if (linuxExtEnabled == 0) - ses->capabilities &= (~server->vals->cap_unix); + struct TCP_Server_Info *server = cifs_ses_server(ses); + + if (!ses->binding) { + ses->capabilities = server->capabilities; + if (linuxExtEnabled == 0) + ses->capabilities &= (~server->vals->cap_unix); + + if (ses->auth_key.response) { + cifs_dbg(FYI, "Free previous auth_key.response = %p\n", + ses->auth_key.response); + kfree(ses->auth_key.response); + ses->auth_key.response = NULL; + ses->auth_key.len = 0; + } + } cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", server->sec_mode, server->capabilities, server->timeAdj); - if (ses->auth_key.response) { - cifs_dbg(FYI, "Free previous auth_key.response = %p\n", - ses->auth_key.response); - kfree(ses->auth_key.response); - ses->auth_key.response = NULL; - ses->auth_key.len = 0; - } - if (server->ops->sess_setup) rc = server->ops->sess_setup(xid, ses, nls_info); if (rc) - cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); + cifs_server_dbg(VFS, "Send error in SessSetup = %d\n", rc); return rc; } diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c index 1692c0c6c23a..43c1b43a07ec 100644 --- a/fs/cifs/dfs_cache.c +++ b/fs/cifs/dfs_cache.c @@ -5,11 +5,10 @@ * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de> */ -#include <linux/rcupdate.h> -#include <linux/rculist.h> #include <linux/jhash.h> #include <linux/ktime.h> #include <linux/slab.h> +#include <linux/proc_fs.h> #include <linux/nls.h> #include <linux/workqueue.h> #include "cifsglob.h" @@ -22,67 +21,68 @@ #include "dfs_cache.h" -#define DFS_CACHE_HTABLE_SIZE 32 -#define DFS_CACHE_MAX_ENTRIES 64 +#define CACHE_HTABLE_SIZE 32 +#define CACHE_MAX_ENTRIES 64 #define IS_INTERLINK_SET(v) ((v) & (DFSREF_REFERRAL_SERVER | \ DFSREF_STORAGE_SERVER)) -struct dfs_cache_tgt { - char *t_name; - struct list_head t_list; +struct cache_dfs_tgt { + char *name; + struct list_head list; }; -struct dfs_cache_entry { - struct hlist_node ce_hlist; - const char *ce_path; - int ce_ttl; - int ce_srvtype; - int ce_flags; - struct timespec64 ce_etime; - int ce_path_consumed; - int ce_numtgts; - struct list_head ce_tlist; - struct dfs_cache_tgt *ce_tgthint; - struct rcu_head ce_rcu; +struct cache_entry { + struct hlist_node hlist; + const char *path; + int ttl; + int srvtype; + int flags; + struct timespec64 etime; + int path_consumed; + int numtgts; + struct list_head tlist; + struct cache_dfs_tgt *tgthint; }; -static struct kmem_cache *dfs_cache_slab __read_mostly; - -struct dfs_cache_vol_info { - char *vi_fullpath; - struct smb_vol vi_vol; - char *vi_mntdata; - struct list_head vi_list; +struct vol_info { + char *fullpath; + spinlock_t smb_vol_lock; + struct smb_vol smb_vol; + char *mntdata; + struct list_head list; + struct list_head rlist; + struct kref refcnt; }; -struct dfs_cache { - struct mutex dc_lock; - struct nls_table *dc_nlsc; - struct list_head dc_vol_list; - int dc_ttl; - struct delayed_work dc_refresh; -}; +static struct kmem_cache *cache_slab __read_mostly; +static struct workqueue_struct *dfscache_wq __read_mostly; -static struct dfs_cache dfs_cache; +static int cache_ttl; +static DEFINE_SPINLOCK(cache_ttl_lock); + +static struct nls_table *cache_nlsc; /* * Number of entries in the cache */ -static size_t dfs_cache_count; +static atomic_t cache_count; + +static struct hlist_head cache_htable[CACHE_HTABLE_SIZE]; +static DECLARE_RWSEM(htable_rw_lock); -static DEFINE_MUTEX(dfs_cache_list_lock); -static struct hlist_head dfs_cache_htable[DFS_CACHE_HTABLE_SIZE]; +static LIST_HEAD(vol_list); +static DEFINE_SPINLOCK(vol_list_lock); static void refresh_cache_worker(struct work_struct *work); -static inline bool is_path_valid(const char *path) -{ - return path && (strchr(path + 1, '\\') || strchr(path + 1, '/')); -} +static DECLARE_DELAYED_WORK(refresh_task, refresh_cache_worker); -static inline int get_normalized_path(const char *path, char **npath) +static int get_normalized_path(const char *path, char **npath) { + if (!path || strlen(path) < 3 || (*path != '\\' && *path != '/')) + return -EINVAL; + if (*path == '\\') { *npath = (char *)path; } else { @@ -100,57 +100,48 @@ static inline void free_normalized_path(const char *path, char *npath) kfree(npath); } -static inline bool cache_entry_expired(const struct dfs_cache_entry *ce) +static inline bool cache_entry_expired(const struct cache_entry *ce) { struct timespec64 ts; ktime_get_coarse_real_ts64(&ts); - return timespec64_compare(&ts, &ce->ce_etime) >= 0; + return timespec64_compare(&ts, &ce->etime) >= 0; } -static inline void free_tgts(struct dfs_cache_entry *ce) +static inline void free_tgts(struct cache_entry *ce) { - struct dfs_cache_tgt *t, *n; + struct cache_dfs_tgt *t, *n; - list_for_each_entry_safe(t, n, &ce->ce_tlist, t_list) { - list_del(&t->t_list); - kfree(t->t_name); + list_for_each_entry_safe(t, n, &ce->tlist, list) { + list_del(&t->list); + kfree(t->name); kfree(t); } } -static void free_cache_entry(struct rcu_head *rcu) +static inline void flush_cache_ent(struct cache_entry *ce) { - struct dfs_cache_entry *ce = container_of(rcu, struct dfs_cache_entry, - ce_rcu); - kmem_cache_free(dfs_cache_slab, ce); -} - -static inline void flush_cache_ent(struct dfs_cache_entry *ce) -{ - if (hlist_unhashed(&ce->ce_hlist)) - return; - - hlist_del_init_rcu(&ce->ce_hlist); - kfree_const(ce->ce_path); + hlist_del_init(&ce->hlist); + kfree(ce->path); free_tgts(ce); - dfs_cache_count--; - call_rcu(&ce->ce_rcu, free_cache_entry); + atomic_dec(&cache_count); + kmem_cache_free(cache_slab, ce); } static void flush_cache_ents(void) { int i; - rcu_read_lock(); - for (i = 0; i < DFS_CACHE_HTABLE_SIZE; i++) { - struct hlist_head *l = &dfs_cache_htable[i]; - struct dfs_cache_entry *ce; + for (i = 0; i < CACHE_HTABLE_SIZE; i++) { + struct hlist_head *l = &cache_htable[i]; + struct hlist_node *n; + struct cache_entry *ce; - hlist_for_each_entry_rcu(ce, l, ce_hlist) - flush_cache_ent(ce); + hlist_for_each_entry_safe(ce, n, l, hlist) { + if (!hlist_unhashed(&ce->hlist)) + flush_cache_ent(ce); + } } - rcu_read_unlock(); } /* @@ -158,36 +149,39 @@ static void flush_cache_ents(void) */ static int dfscache_proc_show(struct seq_file *m, void *v) { - int bucket; - struct dfs_cache_entry *ce; - struct dfs_cache_tgt *t; + int i; + struct cache_entry *ce; + struct cache_dfs_tgt *t; seq_puts(m, "DFS cache\n---------\n"); - mutex_lock(&dfs_cache_list_lock); - - rcu_read_lock(); - hash_for_each_rcu(dfs_cache_htable, bucket, ce, ce_hlist) { - seq_printf(m, - "cache entry: path=%s,type=%s,ttl=%d,etime=%ld," - "interlink=%s,path_consumed=%d,expired=%s\n", - ce->ce_path, - ce->ce_srvtype == DFS_TYPE_ROOT ? "root" : "link", - ce->ce_ttl, ce->ce_etime.tv_nsec, - IS_INTERLINK_SET(ce->ce_flags) ? "yes" : "no", - ce->ce_path_consumed, - cache_entry_expired(ce) ? "yes" : "no"); - - list_for_each_entry(t, &ce->ce_tlist, t_list) { - seq_printf(m, " %s%s\n", - t->t_name, - ce->ce_tgthint == t ? " (target hint)" : ""); + down_read(&htable_rw_lock); + for (i = 0; i < CACHE_HTABLE_SIZE; i++) { + struct hlist_head *l = &cache_htable[i]; + + hlist_for_each_entry(ce, l, hlist) { + if (hlist_unhashed(&ce->hlist)) + continue; + + seq_printf(m, + "cache entry: path=%s,type=%s,ttl=%d,etime=%ld," + "interlink=%s,path_consumed=%d,expired=%s\n", + ce->path, + ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", + ce->ttl, ce->etime.tv_nsec, + IS_INTERLINK_SET(ce->flags) ? "yes" : "no", + ce->path_consumed, + cache_entry_expired(ce) ? "yes" : "no"); + + list_for_each_entry(t, &ce->tlist, list) { + seq_printf(m, " %s%s\n", + t->name, + ce->tgthint == t ? " (target hint)" : ""); + } } - } - rcu_read_unlock(); + up_read(&htable_rw_lock); - mutex_unlock(&dfs_cache_list_lock); return 0; } @@ -205,9 +199,10 @@ static ssize_t dfscache_proc_write(struct file *file, const char __user *buffer, return -EINVAL; cifs_dbg(FYI, "clearing dfs cache"); - mutex_lock(&dfs_cache_list_lock); + + down_write(&htable_rw_lock); flush_cache_ents(); - mutex_unlock(&dfs_cache_list_lock); + up_write(&htable_rw_lock); return count; } @@ -217,34 +212,34 @@ static int dfscache_proc_open(struct inode *inode, struct file *file) return single_open(file, dfscache_proc_show, NULL); } -const struct file_operations dfscache_proc_fops = { - .open = dfscache_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .write = dfscache_proc_write, +const struct proc_ops dfscache_proc_ops = { + .proc_open = dfscache_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = dfscache_proc_write, }; #ifdef CONFIG_CIFS_DEBUG2 -static inline void dump_tgts(const struct dfs_cache_entry *ce) +static inline void dump_tgts(const struct cache_entry *ce) { - struct dfs_cache_tgt *t; + struct cache_dfs_tgt *t; cifs_dbg(FYI, "target list:\n"); - list_for_each_entry(t, &ce->ce_tlist, t_list) { - cifs_dbg(FYI, " %s%s\n", t->t_name, - ce->ce_tgthint == t ? " (target hint)" : ""); + list_for_each_entry(t, &ce->tlist, list) { + cifs_dbg(FYI, " %s%s\n", t->name, + ce->tgthint == t ? " (target hint)" : ""); } } -static inline void dump_ce(const struct dfs_cache_entry *ce) +static inline void dump_ce(const struct cache_entry *ce) { cifs_dbg(FYI, "cache entry: path=%s,type=%s,ttl=%d,etime=%ld," - "interlink=%s,path_consumed=%d,expired=%s\n", ce->ce_path, - ce->ce_srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ce_ttl, - ce->ce_etime.tv_nsec, - IS_INTERLINK_SET(ce->ce_flags) ? "yes" : "no", - ce->ce_path_consumed, + "interlink=%s,path_consumed=%d,expired=%s\n", ce->path, + ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl, + ce->etime.tv_nsec, + IS_INTERLINK_SET(ce->flags) ? "yes" : "no", + ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no"); dump_tgts(ce); } @@ -284,25 +279,34 @@ static inline void dump_refs(const struct dfs_info3_param *refs, int numrefs) */ int dfs_cache_init(void) { + int rc; int i; - dfs_cache_slab = kmem_cache_create("cifs_dfs_cache", - sizeof(struct dfs_cache_entry), 0, - SLAB_HWCACHE_ALIGN, NULL); - if (!dfs_cache_slab) + dfscache_wq = alloc_workqueue("cifs-dfscache", + WQ_FREEZABLE | WQ_MEM_RECLAIM, 1); + if (!dfscache_wq) return -ENOMEM; - for (i = 0; i < DFS_CACHE_HTABLE_SIZE; i++) - INIT_HLIST_HEAD(&dfs_cache_htable[i]); + cache_slab = kmem_cache_create("cifs_dfs_cache", + sizeof(struct cache_entry), 0, + SLAB_HWCACHE_ALIGN, NULL); + if (!cache_slab) { + rc = -ENOMEM; + goto out_destroy_wq; + } + + for (i = 0; i < CACHE_HTABLE_SIZE; i++) + INIT_HLIST_HEAD(&cache_htable[i]); - INIT_LIST_HEAD(&dfs_cache.dc_vol_list); - mutex_init(&dfs_cache.dc_lock); - INIT_DELAYED_WORK(&dfs_cache.dc_refresh, refresh_cache_worker); - dfs_cache.dc_ttl = -1; - dfs_cache.dc_nlsc = load_nls_default(); + atomic_set(&cache_count, 0); + cache_nlsc = load_nls_default(); cifs_dbg(FYI, "%s: initialized DFS referral cache\n", __func__); return 0; + +out_destroy_wq: + destroy_workqueue(dfscache_wq); + return rc; } static inline unsigned int cache_entry_hash(const void *data, int size) @@ -310,7 +314,7 @@ static inline unsigned int cache_entry_hash(const void *data, int size) unsigned int h; h = jhash(data, size, 0); - return h & (DFS_CACHE_HTABLE_SIZE - 1); + return h & (CACHE_HTABLE_SIZE - 1); } /* Check whether second path component of @path is SYSVOL or NETLOGON */ @@ -325,11 +329,11 @@ static inline bool is_sysvol_or_netlogon(const char *path) } /* Return target hint of a DFS cache entry */ -static inline char *get_tgt_name(const struct dfs_cache_entry *ce) +static inline char *get_tgt_name(const struct cache_entry *ce) { - struct dfs_cache_tgt *t = ce->ce_tgthint; + struct cache_dfs_tgt *t = ce->tgthint; - return t ? t->t_name : ERR_PTR(-ENOENT); + return t ? t->name : ERR_PTR(-ENOENT); } /* Return expire time out of a new entry's TTL */ @@ -346,19 +350,19 @@ static inline struct timespec64 get_expire_time(int ttl) } /* Allocate a new DFS target */ -static inline struct dfs_cache_tgt *alloc_tgt(const char *name) +static struct cache_dfs_tgt *alloc_target(const char *name) { - struct dfs_cache_tgt *t; + struct cache_dfs_tgt *t; - t = kmalloc(sizeof(*t), GFP_KERNEL); + t = kmalloc(sizeof(*t), GFP_ATOMIC); if (!t) return ERR_PTR(-ENOMEM); - t->t_name = kstrndup(name, strlen(name), GFP_KERNEL); - if (!t->t_name) { + t->name = kstrndup(name, strlen(name), GFP_ATOMIC); + if (!t->name) { kfree(t); return ERR_PTR(-ENOMEM); } - INIT_LIST_HEAD(&t->t_list); + INIT_LIST_HEAD(&t->list); return t; } @@ -367,180 +371,184 @@ static inline struct dfs_cache_tgt *alloc_tgt(const char *name) * target hint. */ static int copy_ref_data(const struct dfs_info3_param *refs, int numrefs, - struct dfs_cache_entry *ce, const char *tgthint) + struct cache_entry *ce, const char *tgthint) { int i; - ce->ce_ttl = refs[0].ttl; - ce->ce_etime = get_expire_time(ce->ce_ttl); - ce->ce_srvtype = refs[0].server_type; - ce->ce_flags = refs[0].ref_flag; - ce->ce_path_consumed = refs[0].path_consumed; + ce->ttl = refs[0].ttl; + ce->etime = get_expire_time(ce->ttl); + ce->srvtype = refs[0].server_type; + ce->flags = refs[0].ref_flag; + ce->path_consumed = refs[0].path_consumed; for (i = 0; i < numrefs; i++) { - struct dfs_cache_tgt *t; + struct cache_dfs_tgt *t; - t = alloc_tgt(refs[i].node_name); + t = alloc_target(refs[i].node_name); if (IS_ERR(t)) { free_tgts(ce); return PTR_ERR(t); } - if (tgthint && !strcasecmp(t->t_name, tgthint)) { - list_add(&t->t_list, &ce->ce_tlist); + if (tgthint && !strcasecmp(t->name, tgthint)) { + list_add(&t->list, &ce->tlist); tgthint = NULL; } else { - list_add_tail(&t->t_list, &ce->ce_tlist); + list_add_tail(&t->list, &ce->tlist); } - ce->ce_numtgts++; + ce->numtgts++; } - ce->ce_tgthint = list_first_entry_or_null(&ce->ce_tlist, - struct dfs_cache_tgt, t_list); + ce->tgthint = list_first_entry_or_null(&ce->tlist, + struct cache_dfs_tgt, list); return 0; } /* Allocate a new cache entry */ -static struct dfs_cache_entry * -alloc_cache_entry(const char *path, const struct dfs_info3_param *refs, - int numrefs) +static struct cache_entry *alloc_cache_entry(const char *path, + const struct dfs_info3_param *refs, + int numrefs) { - struct dfs_cache_entry *ce; + struct cache_entry *ce; int rc; - ce = kmem_cache_zalloc(dfs_cache_slab, GFP_KERNEL); + ce = kmem_cache_zalloc(cache_slab, GFP_KERNEL); if (!ce) return ERR_PTR(-ENOMEM); - ce->ce_path = kstrdup_const(path, GFP_KERNEL); - if (!ce->ce_path) { - kmem_cache_free(dfs_cache_slab, ce); + ce->path = kstrndup(path, strlen(path), GFP_KERNEL); + if (!ce->path) { + kmem_cache_free(cache_slab, ce); return ERR_PTR(-ENOMEM); } - INIT_HLIST_NODE(&ce->ce_hlist); - INIT_LIST_HEAD(&ce->ce_tlist); + INIT_HLIST_NODE(&ce->hlist); + INIT_LIST_HEAD(&ce->tlist); rc = copy_ref_data(refs, numrefs, ce, NULL); if (rc) { - kfree_const(ce->ce_path); - kmem_cache_free(dfs_cache_slab, ce); + kfree(ce->path); + kmem_cache_free(cache_slab, ce); ce = ERR_PTR(rc); } return ce; } +/* Must be called with htable_rw_lock held */ static void remove_oldest_entry(void) { - int bucket; - struct dfs_cache_entry *ce; - struct dfs_cache_entry *to_del = NULL; - - rcu_read_lock(); - hash_for_each_rcu(dfs_cache_htable, bucket, ce, ce_hlist) { - if (!to_del || timespec64_compare(&ce->ce_etime, - &to_del->ce_etime) < 0) - to_del = ce; + int i; + struct cache_entry *ce; + struct cache_entry *to_del = NULL; + + for (i = 0; i < CACHE_HTABLE_SIZE; i++) { + struct hlist_head *l = &cache_htable[i]; + + hlist_for_each_entry(ce, l, hlist) { + if (hlist_unhashed(&ce->hlist)) + continue; + if (!to_del || timespec64_compare(&ce->etime, + &to_del->etime) < 0) + to_del = ce; + } } + if (!to_del) { cifs_dbg(FYI, "%s: no entry to remove", __func__); - goto out; + return; } + cifs_dbg(FYI, "%s: removing entry", __func__); dump_ce(to_del); flush_cache_ent(to_del); -out: - rcu_read_unlock(); } /* Add a new DFS cache entry */ -static inline struct dfs_cache_entry * -add_cache_entry(unsigned int hash, const char *path, - const struct dfs_info3_param *refs, int numrefs) +static int add_cache_entry(const char *path, unsigned int hash, + struct dfs_info3_param *refs, int numrefs) { - struct dfs_cache_entry *ce; + struct cache_entry *ce; ce = alloc_cache_entry(path, refs, numrefs); if (IS_ERR(ce)) - return ce; + return PTR_ERR(ce); - hlist_add_head_rcu(&ce->ce_hlist, &dfs_cache_htable[hash]); - - mutex_lock(&dfs_cache.dc_lock); - if (dfs_cache.dc_ttl < 0) { - dfs_cache.dc_ttl = ce->ce_ttl; - queue_delayed_work(cifsiod_wq, &dfs_cache.dc_refresh, - dfs_cache.dc_ttl * HZ); + spin_lock(&cache_ttl_lock); + if (!cache_ttl) { + cache_ttl = ce->ttl; + queue_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ); } else { - dfs_cache.dc_ttl = min_t(int, dfs_cache.dc_ttl, ce->ce_ttl); - mod_delayed_work(cifsiod_wq, &dfs_cache.dc_refresh, - dfs_cache.dc_ttl * HZ); + cache_ttl = min_t(int, cache_ttl, ce->ttl); + mod_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ); } - mutex_unlock(&dfs_cache.dc_lock); + spin_unlock(&cache_ttl_lock); - return ce; + down_write(&htable_rw_lock); + hlist_add_head(&ce->hlist, &cache_htable[hash]); + dump_ce(ce); + up_write(&htable_rw_lock); + + return 0; } -static struct dfs_cache_entry *__find_cache_entry(unsigned int hash, - const char *path) +/* + * Find a DFS cache entry in hash table and optionally check prefix path against + * @path. + * Use whole path components in the match. + * Must be called with htable_rw_lock held. + * + * Return ERR_PTR(-ENOENT) if the entry is not found. + */ +static struct cache_entry *lookup_cache_entry(const char *path, + unsigned int *hash) { - struct dfs_cache_entry *ce; + struct cache_entry *ce; + unsigned int h; bool found = false; - rcu_read_lock(); - hlist_for_each_entry_rcu(ce, &dfs_cache_htable[hash], ce_hlist) { - if (!strcasecmp(path, ce->ce_path)) { -#ifdef CONFIG_CIFS_DEBUG2 - char *name = get_tgt_name(ce); + h = cache_entry_hash(path, strlen(path)); - if (IS_ERR(name)) { - rcu_read_unlock(); - return ERR_CAST(name); - } - cifs_dbg(FYI, "%s: cache hit\n", __func__); - cifs_dbg(FYI, "%s: target hint: %s\n", __func__, name); -#endif + hlist_for_each_entry(ce, &cache_htable[h], hlist) { + if (!strcasecmp(path, ce->path)) { found = true; + dump_ce(ce); break; } } - rcu_read_unlock(); - return found ? ce : ERR_PTR(-ENOENT); -} -/* - * Find a DFS cache entry in hash table and optionally check prefix path against - * @path. - * Use whole path components in the match. - * Return ERR_PTR(-ENOENT) if the entry is not found. - */ -static inline struct dfs_cache_entry *find_cache_entry(const char *path, - unsigned int *hash) -{ - *hash = cache_entry_hash(path, strlen(path)); - return __find_cache_entry(*hash, path); + if (!found) + ce = ERR_PTR(-ENOENT); + if (hash) + *hash = h; + + return ce; } -static inline void destroy_slab_cache(void) +static void __vol_release(struct vol_info *vi) { - rcu_barrier(); - kmem_cache_destroy(dfs_cache_slab); + kfree(vi->fullpath); + kfree(vi->mntdata); + cifs_cleanup_volume_info_contents(&vi->smb_vol); + kfree(vi); } -static inline void free_vol(struct dfs_cache_vol_info *vi) +static void vol_release(struct kref *kref) { - list_del(&vi->vi_list); - kfree(vi->vi_fullpath); - kfree(vi->vi_mntdata); - cifs_cleanup_volume_info_contents(&vi->vi_vol); - kfree(vi); + struct vol_info *vi = container_of(kref, struct vol_info, refcnt); + + spin_lock(&vol_list_lock); + list_del(&vi->list); + spin_unlock(&vol_list_lock); + __vol_release(vi); } static inline void free_vol_list(void) { - struct dfs_cache_vol_info *vi, *nvi; + struct vol_info *vi, *nvi; - list_for_each_entry_safe(vi, nvi, &dfs_cache.dc_vol_list, vi_list) - free_vol(vi); + list_for_each_entry_safe(vi, nvi, &vol_list, list) { + list_del_init(&vi->list); + __vol_release(vi); + } } /** @@ -548,83 +556,78 @@ static inline void free_vol_list(void) */ void dfs_cache_destroy(void) { - cancel_delayed_work_sync(&dfs_cache.dc_refresh); - unload_nls(dfs_cache.dc_nlsc); + cancel_delayed_work_sync(&refresh_task); + unload_nls(cache_nlsc); free_vol_list(); - mutex_destroy(&dfs_cache.dc_lock); - flush_cache_ents(); - destroy_slab_cache(); - mutex_destroy(&dfs_cache_list_lock); + kmem_cache_destroy(cache_slab); + destroy_workqueue(dfscache_wq); cifs_dbg(FYI, "%s: destroyed DFS referral cache\n", __func__); } -static inline struct dfs_cache_entry * -__update_cache_entry(const char *path, const struct dfs_info3_param *refs, - int numrefs) +/* Must be called with htable_rw_lock held */ +static int __update_cache_entry(const char *path, + const struct dfs_info3_param *refs, + int numrefs) { int rc; - unsigned int h; - struct dfs_cache_entry *ce; + struct cache_entry *ce; char *s, *th = NULL; - ce = find_cache_entry(path, &h); + ce = lookup_cache_entry(path, NULL); if (IS_ERR(ce)) - return ce; + return PTR_ERR(ce); - if (ce->ce_tgthint) { - s = ce->ce_tgthint->t_name; - th = kstrndup(s, strlen(s), GFP_KERNEL); + if (ce->tgthint) { + s = ce->tgthint->name; + th = kstrndup(s, strlen(s), GFP_ATOMIC); if (!th) - return ERR_PTR(-ENOMEM); + return -ENOMEM; } free_tgts(ce); - ce->ce_numtgts = 0; + ce->numtgts = 0; rc = copy_ref_data(refs, numrefs, ce, th); - kfree(th); - if (rc) - ce = ERR_PTR(rc); + kfree(th); - return ce; + return rc; } -/* Update an expired cache entry by getting a new DFS referral from server */ -static struct dfs_cache_entry * -update_cache_entry(const unsigned int xid, struct cifs_ses *ses, - const struct nls_table *nls_codepage, int remap, - const char *path, struct dfs_cache_entry *ce) +static int get_dfs_referral(const unsigned int xid, struct cifs_ses *ses, + const struct nls_table *nls_codepage, int remap, + const char *path, struct dfs_info3_param **refs, + int *numrefs) { - int rc; - struct dfs_info3_param *refs = NULL; - int numrefs = 0; + cifs_dbg(FYI, "%s: get an DFS referral for %s\n", __func__, path); - cifs_dbg(FYI, "%s: update expired cache entry\n", __func__); - /* - * Check if caller provided enough parameters to update an expired - * entry. - */ if (!ses || !ses->server || !ses->server->ops->get_dfs_refer) - return ERR_PTR(-ETIME); + return -EOPNOTSUPP; if (unlikely(!nls_codepage)) - return ERR_PTR(-ETIME); + return -EINVAL; - cifs_dbg(FYI, "%s: DFS referral request for %s\n", __func__, path); + *refs = NULL; + *numrefs = 0; - rc = ses->server->ops->get_dfs_refer(xid, ses, path, &refs, &numrefs, - nls_codepage, remap); - if (rc) - ce = ERR_PTR(rc); - else - ce = __update_cache_entry(path, refs, numrefs); + return ses->server->ops->get_dfs_refer(xid, ses, path, refs, numrefs, + nls_codepage, remap); +} - dump_refs(refs, numrefs); - free_dfs_info_array(refs, numrefs); +/* Update an expired cache entry by getting a new DFS referral from server */ +static int update_cache_entry(const char *path, + const struct dfs_info3_param *refs, + int numrefs) +{ - return ce; + int rc; + + down_write(&htable_rw_lock); + rc = __update_cache_entry(path, refs, numrefs); + up_write(&htable_rw_lock); + + return rc; } /* @@ -636,95 +639,86 @@ update_cache_entry(const unsigned int xid, struct cifs_ses *ses, * For interlinks, __cifs_dfs_mount() and expand_dfs_referral() are supposed to * handle them properly. */ -static struct dfs_cache_entry * -do_dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, - const struct nls_table *nls_codepage, int remap, - const char *path, bool noreq) +static int __dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, + const struct nls_table *nls_codepage, int remap, + const char *path, bool noreq) { int rc; - unsigned int h; - struct dfs_cache_entry *ce; - struct dfs_info3_param *nrefs; - int numnrefs; + unsigned int hash; + struct cache_entry *ce; + struct dfs_info3_param *refs = NULL; + int numrefs = 0; + bool newent = false; cifs_dbg(FYI, "%s: search path: %s\n", __func__, path); - ce = find_cache_entry(path, &h); - if (IS_ERR(ce)) { - cifs_dbg(FYI, "%s: cache miss\n", __func__); - /* - * If @noreq is set, no requests will be sent to the server for - * either updating or getting a new DFS referral. - */ - if (noreq) - return ce; - /* - * No cache entry was found, so check for valid parameters that - * will be required to get a new DFS referral and then create a - * new cache entry. - */ - if (!ses || !ses->server || !ses->server->ops->get_dfs_refer) { - ce = ERR_PTR(-EOPNOTSUPP); - return ce; - } - if (unlikely(!nls_codepage)) { - ce = ERR_PTR(-EINVAL); - return ce; - } + down_read(&htable_rw_lock); - nrefs = NULL; - numnrefs = 0; + ce = lookup_cache_entry(path, &hash); - cifs_dbg(FYI, "%s: DFS referral request for %s\n", __func__, - path); + /* + * If @noreq is set, no requests will be sent to the server. Just return + * the cache entry. + */ + if (noreq) { + up_read(&htable_rw_lock); + return PTR_ERR_OR_ZERO(ce); + } - rc = ses->server->ops->get_dfs_refer(xid, ses, path, &nrefs, - &numnrefs, nls_codepage, - remap); - if (rc) { - ce = ERR_PTR(rc); - return ce; + if (!IS_ERR(ce)) { + if (!cache_entry_expired(ce)) { + dump_ce(ce); + up_read(&htable_rw_lock); + return 0; } + } else { + newent = true; + } - dump_refs(nrefs, numnrefs); + up_read(&htable_rw_lock); - cifs_dbg(FYI, "%s: new cache entry\n", __func__); + /* + * No entry was found. + * + * Request a new DFS referral in order to create a new cache entry, or + * updating an existing one. + */ + rc = get_dfs_referral(xid, ses, nls_codepage, remap, path, + &refs, &numrefs); + if (rc) + return rc; - if (dfs_cache_count >= DFS_CACHE_MAX_ENTRIES) { - cifs_dbg(FYI, "%s: reached max cache size (%d)", - __func__, DFS_CACHE_MAX_ENTRIES); - remove_oldest_entry(); - } - ce = add_cache_entry(h, path, nrefs, numnrefs); - free_dfs_info_array(nrefs, numnrefs); + dump_refs(refs, numrefs); - if (IS_ERR(ce)) - return ce; + if (!newent) { + rc = update_cache_entry(path, refs, numrefs); + goto out_free_refs; + } - dfs_cache_count++; + if (atomic_read(&cache_count) >= CACHE_MAX_ENTRIES) { + cifs_dbg(FYI, "%s: reached max cache size (%d)", __func__, + CACHE_MAX_ENTRIES); + down_write(&htable_rw_lock); + remove_oldest_entry(); + up_write(&htable_rw_lock); } - dump_ce(ce); + rc = add_cache_entry(path, hash, refs, numrefs); + if (!rc) + atomic_inc(&cache_count); - /* Just return the found cache entry in case @noreq is set */ - if (noreq) - return ce; - - if (cache_entry_expired(ce)) { - cifs_dbg(FYI, "%s: expired cache entry\n", __func__); - ce = update_cache_entry(xid, ses, nls_codepage, remap, path, - ce); - if (IS_ERR(ce)) { - cifs_dbg(FYI, "%s: failed to update expired entry\n", - __func__); - } - } - return ce; +out_free_refs: + free_dfs_info_array(refs, numrefs); + return rc; } -/* Set up a new DFS referral from a given cache entry */ -static int setup_ref(const char *path, const struct dfs_cache_entry *ce, - struct dfs_info3_param *ref, const char *tgt) +/* + * Set up a DFS referral from a given cache entry. + * + * Must be called with htable_rw_lock held. + */ +static int setup_referral(const char *path, struct cache_entry *ce, + struct dfs_info3_param *ref, const char *target) { int rc; @@ -732,21 +726,20 @@ static int setup_ref(const char *path, const struct dfs_cache_entry *ce, memset(ref, 0, sizeof(*ref)); - ref->path_name = kstrndup(path, strlen(path), GFP_KERNEL); + ref->path_name = kstrndup(path, strlen(path), GFP_ATOMIC); if (!ref->path_name) return -ENOMEM; - ref->path_consumed = ce->ce_path_consumed; - - ref->node_name = kstrndup(tgt, strlen(tgt), GFP_KERNEL); + ref->node_name = kstrndup(target, strlen(target), GFP_ATOMIC); if (!ref->node_name) { rc = -ENOMEM; goto err_free_path; } - ref->ttl = ce->ce_ttl; - ref->server_type = ce->ce_srvtype; - ref->ref_flag = ce->ce_flags; + ref->path_consumed = ce->path_consumed; + ref->ttl = ce->ttl; + ref->server_type = ce->srvtype; + ref->ref_flag = ce->flags; return 0; @@ -757,38 +750,37 @@ err_free_path: } /* Return target list of a DFS cache entry */ -static int get_tgt_list(const struct dfs_cache_entry *ce, - struct dfs_cache_tgt_list *tl) +static int get_targets(struct cache_entry *ce, struct dfs_cache_tgt_list *tl) { int rc; struct list_head *head = &tl->tl_list; - struct dfs_cache_tgt *t; + struct cache_dfs_tgt *t; struct dfs_cache_tgt_iterator *it, *nit; memset(tl, 0, sizeof(*tl)); INIT_LIST_HEAD(head); - list_for_each_entry(t, &ce->ce_tlist, t_list) { - it = kzalloc(sizeof(*it), GFP_KERNEL); + list_for_each_entry(t, &ce->tlist, list) { + it = kzalloc(sizeof(*it), GFP_ATOMIC); if (!it) { rc = -ENOMEM; goto err_free_it; } - it->it_name = kstrndup(t->t_name, strlen(t->t_name), - GFP_KERNEL); + it->it_name = kstrndup(t->name, strlen(t->name), GFP_ATOMIC); if (!it->it_name) { kfree(it); rc = -ENOMEM; goto err_free_it; } - if (ce->ce_tgthint == t) + if (ce->tgthint == t) list_add(&it->it_list, head); else list_add_tail(&it->it_list, head); } - tl->tl_numtgts = ce->ce_numtgts; + + tl->tl_numtgts = ce->numtgts; return 0; @@ -829,28 +821,35 @@ int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, { int rc; char *npath; - struct dfs_cache_entry *ce; - - if (unlikely(!is_path_valid(path))) - return -EINVAL; + struct cache_entry *ce; rc = get_normalized_path(path, &npath); if (rc) return rc; - mutex_lock(&dfs_cache_list_lock); - ce = do_dfs_cache_find(xid, ses, nls_codepage, remap, npath, false); - if (!IS_ERR(ce)) { - if (ref) - rc = setup_ref(path, ce, ref, get_tgt_name(ce)); - else - rc = 0; - if (!rc && tgt_list) - rc = get_tgt_list(ce, tgt_list); - } else { + rc = __dfs_cache_find(xid, ses, nls_codepage, remap, npath, false); + if (rc) + goto out_free_path; + + down_read(&htable_rw_lock); + + ce = lookup_cache_entry(npath, NULL); + if (IS_ERR(ce)) { + up_read(&htable_rw_lock); rc = PTR_ERR(ce); + goto out_free_path; } - mutex_unlock(&dfs_cache_list_lock); + + if (ref) + rc = setup_referral(path, ce, ref, get_tgt_name(ce)); + else + rc = 0; + if (!rc && tgt_list) + rc = get_targets(ce, tgt_list); + + up_read(&htable_rw_lock); + +out_free_path: free_normalized_path(path, npath); return rc; } @@ -876,31 +875,33 @@ int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref, { int rc; char *npath; - struct dfs_cache_entry *ce; - - if (unlikely(!is_path_valid(path))) - return -EINVAL; + struct cache_entry *ce; rc = get_normalized_path(path, &npath); if (rc) return rc; - mutex_lock(&dfs_cache_list_lock); - ce = do_dfs_cache_find(0, NULL, NULL, 0, npath, true); + cifs_dbg(FYI, "%s: path: %s\n", __func__, npath); + + down_read(&htable_rw_lock); + + ce = lookup_cache_entry(npath, NULL); if (IS_ERR(ce)) { rc = PTR_ERR(ce); - goto out; + goto out_unlock; } if (ref) - rc = setup_ref(path, ce, ref, get_tgt_name(ce)); + rc = setup_referral(path, ce, ref, get_tgt_name(ce)); else rc = 0; if (!rc && tgt_list) - rc = get_tgt_list(ce, tgt_list); -out: - mutex_unlock(&dfs_cache_list_lock); + rc = get_targets(ce, tgt_list); + +out_unlock: + up_read(&htable_rw_lock); free_normalized_path(path, npath); + return rc; } @@ -929,44 +930,46 @@ int dfs_cache_update_tgthint(const unsigned int xid, struct cifs_ses *ses, { int rc; char *npath; - struct dfs_cache_entry *ce; - struct dfs_cache_tgt *t; - - if (unlikely(!is_path_valid(path))) - return -EINVAL; + struct cache_entry *ce; + struct cache_dfs_tgt *t; rc = get_normalized_path(path, &npath); if (rc) return rc; - cifs_dbg(FYI, "%s: path: %s\n", __func__, npath); + cifs_dbg(FYI, "%s: update target hint - path: %s\n", __func__, npath); - mutex_lock(&dfs_cache_list_lock); - ce = do_dfs_cache_find(xid, ses, nls_codepage, remap, npath, false); + rc = __dfs_cache_find(xid, ses, nls_codepage, remap, npath, false); + if (rc) + goto out_free_path; + + down_write(&htable_rw_lock); + + ce = lookup_cache_entry(npath, NULL); if (IS_ERR(ce)) { rc = PTR_ERR(ce); - goto out; + goto out_unlock; } - rc = 0; - - t = ce->ce_tgthint; + t = ce->tgthint; - if (likely(!strcasecmp(it->it_name, t->t_name))) - goto out; + if (likely(!strcasecmp(it->it_name, t->name))) + goto out_unlock; - list_for_each_entry(t, &ce->ce_tlist, t_list) { - if (!strcasecmp(t->t_name, it->it_name)) { - ce->ce_tgthint = t; + list_for_each_entry(t, &ce->tlist, list) { + if (!strcasecmp(t->name, it->it_name)) { + ce->tgthint = t; cifs_dbg(FYI, "%s: new target hint: %s\n", __func__, it->it_name); break; } } -out: - mutex_unlock(&dfs_cache_list_lock); +out_unlock: + up_write(&htable_rw_lock); +out_free_path: free_normalized_path(path, npath); + return rc; } @@ -989,10 +992,10 @@ int dfs_cache_noreq_update_tgthint(const char *path, { int rc; char *npath; - struct dfs_cache_entry *ce; - struct dfs_cache_tgt *t; + struct cache_entry *ce; + struct cache_dfs_tgt *t; - if (unlikely(!is_path_valid(path)) || !it) + if (!it) return -EINVAL; rc = get_normalized_path(path, &npath); @@ -1001,33 +1004,33 @@ int dfs_cache_noreq_update_tgthint(const char *path, cifs_dbg(FYI, "%s: path: %s\n", __func__, npath); - mutex_lock(&dfs_cache_list_lock); + down_write(&htable_rw_lock); - ce = do_dfs_cache_find(0, NULL, NULL, 0, npath, true); + ce = lookup_cache_entry(npath, NULL); if (IS_ERR(ce)) { rc = PTR_ERR(ce); - goto out; + goto out_unlock; } rc = 0; + t = ce->tgthint; - t = ce->ce_tgthint; + if (unlikely(!strcasecmp(it->it_name, t->name))) + goto out_unlock; - if (unlikely(!strcasecmp(it->it_name, t->t_name))) - goto out; - - list_for_each_entry(t, &ce->ce_tlist, t_list) { - if (!strcasecmp(t->t_name, it->it_name)) { - ce->ce_tgthint = t; + list_for_each_entry(t, &ce->tlist, list) { + if (!strcasecmp(t->name, it->it_name)) { + ce->tgthint = t; cifs_dbg(FYI, "%s: new target hint: %s\n", __func__, it->it_name); break; } } -out: - mutex_unlock(&dfs_cache_list_lock); +out_unlock: + up_write(&htable_rw_lock); free_normalized_path(path, npath); + return rc; } @@ -1047,13 +1050,10 @@ int dfs_cache_get_tgt_referral(const char *path, { int rc; char *npath; - struct dfs_cache_entry *ce; - unsigned int h; + struct cache_entry *ce; if (!it || !ref) return -EINVAL; - if (unlikely(!is_path_valid(path))) - return -EINVAL; rc = get_normalized_path(path, &npath); if (rc) @@ -1061,21 +1061,22 @@ int dfs_cache_get_tgt_referral(const char *path, cifs_dbg(FYI, "%s: path: %s\n", __func__, npath); - mutex_lock(&dfs_cache_list_lock); + down_read(&htable_rw_lock); - ce = find_cache_entry(npath, &h); + ce = lookup_cache_entry(npath, NULL); if (IS_ERR(ce)) { rc = PTR_ERR(ce); - goto out; + goto out_unlock; } cifs_dbg(FYI, "%s: target name: %s\n", __func__, it->it_name); - rc = setup_ref(path, ce, ref, it->it_name); + rc = setup_referral(path, ce, ref, it->it_name); -out: - mutex_unlock(&dfs_cache_list_lock); +out_unlock: + up_read(&htable_rw_lock); free_normalized_path(path, npath); + return rc; } @@ -1085,7 +1086,7 @@ static int dup_vol(struct smb_vol *vol, struct smb_vol *new) if (vol->username) { new->username = kstrndup(vol->username, strlen(vol->username), - GFP_KERNEL); + GFP_KERNEL); if (!new->username) return -ENOMEM; } @@ -1103,7 +1104,7 @@ static int dup_vol(struct smb_vol *vol, struct smb_vol *new) } if (vol->domainname) { new->domainname = kstrndup(vol->domainname, - strlen(vol->domainname), GFP_KERNEL); + strlen(vol->domainname), GFP_KERNEL); if (!new->domainname) goto err_free_unc; } @@ -1150,7 +1151,7 @@ err_free_username: int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol, const char *fullpath) { int rc; - struct dfs_cache_vol_info *vi; + struct vol_info *vi; if (!vol || !fullpath || !mntdata) return -EINVAL; @@ -1161,38 +1162,41 @@ int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol, const char *fullpath) if (!vi) return -ENOMEM; - vi->vi_fullpath = kstrndup(fullpath, strlen(fullpath), GFP_KERNEL); - if (!vi->vi_fullpath) { + vi->fullpath = kstrndup(fullpath, strlen(fullpath), GFP_KERNEL); + if (!vi->fullpath) { rc = -ENOMEM; goto err_free_vi; } - rc = dup_vol(vol, &vi->vi_vol); + rc = dup_vol(vol, &vi->smb_vol); if (rc) goto err_free_fullpath; - vi->vi_mntdata = mntdata; + vi->mntdata = mntdata; + spin_lock_init(&vi->smb_vol_lock); + kref_init(&vi->refcnt); + + spin_lock(&vol_list_lock); + list_add_tail(&vi->list, &vol_list); + spin_unlock(&vol_list_lock); - mutex_lock(&dfs_cache.dc_lock); - list_add_tail(&vi->vi_list, &dfs_cache.dc_vol_list); - mutex_unlock(&dfs_cache.dc_lock); return 0; err_free_fullpath: - kfree(vi->vi_fullpath); + kfree(vi->fullpath); err_free_vi: kfree(vi); return rc; } -static inline struct dfs_cache_vol_info *find_vol(const char *fullpath) +/* Must be called with vol_list_lock held */ +static struct vol_info *find_vol(const char *fullpath) { - struct dfs_cache_vol_info *vi; + struct vol_info *vi; - list_for_each_entry(vi, &dfs_cache.dc_vol_list, vi_list) { - cifs_dbg(FYI, "%s: vi->vi_fullpath: %s\n", __func__, - vi->vi_fullpath); - if (!strcasecmp(vi->vi_fullpath, fullpath)) + list_for_each_entry(vi, &vol_list, list) { + cifs_dbg(FYI, "%s: vi->fullpath: %s\n", __func__, vi->fullpath); + if (!strcasecmp(vi->fullpath, fullpath)) return vi; } return ERR_PTR(-ENOENT); @@ -1208,30 +1212,31 @@ static inline struct dfs_cache_vol_info *find_vol(const char *fullpath) */ int dfs_cache_update_vol(const char *fullpath, struct TCP_Server_Info *server) { - int rc; - struct dfs_cache_vol_info *vi; + struct vol_info *vi; if (!fullpath || !server) return -EINVAL; cifs_dbg(FYI, "%s: fullpath: %s\n", __func__, fullpath); - mutex_lock(&dfs_cache.dc_lock); - + spin_lock(&vol_list_lock); vi = find_vol(fullpath); if (IS_ERR(vi)) { - rc = PTR_ERR(vi); - goto out; + spin_unlock(&vol_list_lock); + return PTR_ERR(vi); } + kref_get(&vi->refcnt); + spin_unlock(&vol_list_lock); cifs_dbg(FYI, "%s: updating volume info\n", __func__); - memcpy(&vi->vi_vol.dstaddr, &server->dstaddr, - sizeof(vi->vi_vol.dstaddr)); - rc = 0; + spin_lock(&vi->smb_vol_lock); + memcpy(&vi->smb_vol.dstaddr, &server->dstaddr, + sizeof(vi->smb_vol.dstaddr)); + spin_unlock(&vi->smb_vol_lock); -out: - mutex_unlock(&dfs_cache.dc_lock); - return rc; + kref_put(&vi->refcnt, vol_release); + + return 0; } /** @@ -1241,18 +1246,18 @@ out: */ void dfs_cache_del_vol(const char *fullpath) { - struct dfs_cache_vol_info *vi; + struct vol_info *vi; if (!fullpath || !*fullpath) return; cifs_dbg(FYI, "%s: fullpath: %s\n", __func__, fullpath); - mutex_lock(&dfs_cache.dc_lock); + spin_lock(&vol_list_lock); vi = find_vol(fullpath); - if (!IS_ERR(vi)) - free_vol(vi); - mutex_unlock(&dfs_cache.dc_lock); + spin_unlock(&vol_list_lock); + + kref_put(&vi->refcnt, vol_release); } /* Get all tcons that are within a DFS namespace and can be refreshed */ @@ -1280,7 +1285,7 @@ static void get_tcons(struct TCP_Server_Info *server, struct list_head *head) spin_unlock(&cifs_tcp_ses_lock); } -static inline bool is_dfs_link(const char *path) +static bool is_dfs_link(const char *path) { char *s; @@ -1290,7 +1295,7 @@ static inline bool is_dfs_link(const char *path) return !!strchr(s + 1, '\\'); } -static inline char *get_dfs_root(const char *path) +static char *get_dfs_root(const char *path) { char *s, *npath; @@ -1309,32 +1314,67 @@ static inline char *get_dfs_root(const char *path) return npath; } +static inline void put_tcp_server(struct TCP_Server_Info *server) +{ + cifs_put_tcp_session(server, 0); +} + +static struct TCP_Server_Info *get_tcp_server(struct smb_vol *vol) +{ + struct TCP_Server_Info *server; + + server = cifs_find_tcp_session(vol); + if (IS_ERR_OR_NULL(server)) + return NULL; + + spin_lock(&GlobalMid_Lock); + if (server->tcpStatus != CifsGood) { + spin_unlock(&GlobalMid_Lock); + put_tcp_server(server); + return NULL; + } + spin_unlock(&GlobalMid_Lock); + + return server; +} + /* Find root SMB session out of a DFS link path */ -static struct cifs_ses *find_root_ses(struct dfs_cache_vol_info *vi, - struct cifs_tcon *tcon, const char *path) +static struct cifs_ses *find_root_ses(struct vol_info *vi, + struct cifs_tcon *tcon, + const char *path) { char *rpath; int rc; + struct cache_entry *ce; struct dfs_info3_param ref = {0}; char *mdata = NULL, *devname = NULL; - bool is_smb3 = tcon->ses->server->vals->header_preamble_size == 0; struct TCP_Server_Info *server; struct cifs_ses *ses; - struct smb_vol vol; + struct smb_vol vol = {NULL}; rpath = get_dfs_root(path); if (IS_ERR(rpath)) return ERR_CAST(rpath); - memset(&vol, 0, sizeof(vol)); + down_read(&htable_rw_lock); + + ce = lookup_cache_entry(rpath, NULL); + if (IS_ERR(ce)) { + up_read(&htable_rw_lock); + ses = ERR_CAST(ce); + goto out; + } - rc = dfs_cache_noreq_find(rpath, &ref, NULL); + rc = setup_referral(path, ce, &ref, get_tgt_name(ce)); if (rc) { + up_read(&htable_rw_lock); ses = ERR_PTR(rc); goto out; } - mdata = cifs_compose_mount_options(vi->vi_mntdata, rpath, &ref, + up_read(&htable_rw_lock); + + mdata = cifs_compose_mount_options(vi->mntdata, rpath, &ref, &devname); free_dfs_info_param(&ref); @@ -1344,7 +1384,7 @@ static struct cifs_ses *find_root_ses(struct dfs_cache_vol_info *vi, goto out; } - rc = cifs_setup_volume_info(&vol, mdata, devname, is_smb3); + rc = cifs_setup_volume_info(&vol, mdata, devname, false); kfree(devname); if (rc) { @@ -1352,13 +1392,8 @@ static struct cifs_ses *find_root_ses(struct dfs_cache_vol_info *vi, goto out; } - server = cifs_find_tcp_session(&vol); - if (IS_ERR_OR_NULL(server)) { - ses = ERR_PTR(-EHOSTDOWN); - goto out; - } - if (server->tcpStatus != CifsGood) { - cifs_put_tcp_session(server, 0); + server = get_tcp_server(&vol); + if (!server) { ses = ERR_PTR(-EHOSTDOWN); goto out; } @@ -1374,17 +1409,15 @@ out: } /* Refresh DFS cache entry from a given tcon */ -static void do_refresh_tcon(struct dfs_cache *dc, struct dfs_cache_vol_info *vi, - struct cifs_tcon *tcon) +static int refresh_tcon(struct vol_info *vi, struct cifs_tcon *tcon) { int rc = 0; unsigned int xid; char *path, *npath; - unsigned int h; - struct dfs_cache_entry *ce; + struct cache_entry *ce; + struct cifs_ses *root_ses = NULL, *ses; struct dfs_info3_param *refs = NULL; int numrefs = 0; - struct cifs_ses *root_ses = NULL, *ses; xid = get_xid(); @@ -1392,19 +1425,23 @@ static void do_refresh_tcon(struct dfs_cache *dc, struct dfs_cache_vol_info *vi, rc = get_normalized_path(path, &npath); if (rc) - goto out; + goto out_free_xid; - mutex_lock(&dfs_cache_list_lock); - ce = find_cache_entry(npath, &h); - mutex_unlock(&dfs_cache_list_lock); + down_read(&htable_rw_lock); + ce = lookup_cache_entry(npath, NULL); if (IS_ERR(ce)) { rc = PTR_ERR(ce); - goto out; + up_read(&htable_rw_lock); + goto out_free_path; } - if (!cache_entry_expired(ce)) - goto out; + if (!cache_entry_expired(ce)) { + up_read(&htable_rw_lock); + goto out_free_path; + } + + up_read(&htable_rw_lock); /* If it's a DFS Link, then use root SMB session for refreshing it */ if (is_dfs_link(npath)) { @@ -1412,35 +1449,29 @@ static void do_refresh_tcon(struct dfs_cache *dc, struct dfs_cache_vol_info *vi, if (IS_ERR(ses)) { rc = PTR_ERR(ses); root_ses = NULL; - goto out; + goto out_free_path; } } else { ses = tcon->ses; } - if (unlikely(!ses->server->ops->get_dfs_refer)) { - rc = -EOPNOTSUPP; - } else { - rc = ses->server->ops->get_dfs_refer(xid, ses, path, &refs, - &numrefs, dc->dc_nlsc, - tcon->remap); - if (!rc) { - mutex_lock(&dfs_cache_list_lock); - ce = __update_cache_entry(npath, refs, numrefs); - mutex_unlock(&dfs_cache_list_lock); - dump_refs(refs, numrefs); - free_dfs_info_array(refs, numrefs); - if (IS_ERR(ce)) - rc = PTR_ERR(ce); - } + rc = get_dfs_referral(xid, ses, cache_nlsc, tcon->remap, npath, &refs, + &numrefs); + if (!rc) { + dump_refs(refs, numrefs); + rc = update_cache_entry(npath, refs, numrefs); + free_dfs_info_array(refs, numrefs); } -out: if (root_ses) cifs_put_smb_ses(root_ses); - free_xid(xid); +out_free_path: free_normalized_path(path, npath); + +out_free_xid: + free_xid(xid); + return rc; } /* @@ -1449,30 +1480,61 @@ out: */ static void refresh_cache_worker(struct work_struct *work) { - struct dfs_cache *dc = container_of(work, struct dfs_cache, - dc_refresh.work); - struct dfs_cache_vol_info *vi; + struct vol_info *vi, *nvi; struct TCP_Server_Info *server; - LIST_HEAD(list); + LIST_HEAD(vols); + LIST_HEAD(tcons); struct cifs_tcon *tcon, *ntcon; + int rc; - mutex_lock(&dc->dc_lock); - - list_for_each_entry(vi, &dc->dc_vol_list, vi_list) { - server = cifs_find_tcp_session(&vi->vi_vol); - if (IS_ERR_OR_NULL(server)) + /* + * Find SMB volumes that are eligible (server->tcpStatus == CifsGood) + * for refreshing. + */ + spin_lock(&vol_list_lock); + list_for_each_entry(vi, &vol_list, list) { + server = get_tcp_server(&vi->smb_vol); + if (!server) continue; - if (server->tcpStatus != CifsGood) - goto next; - get_tcons(server, &list); - list_for_each_entry_safe(tcon, ntcon, &list, ulist) { - do_refresh_tcon(dc, vi, tcon); + + kref_get(&vi->refcnt); + list_add_tail(&vi->rlist, &vols); + put_tcp_server(server); + } + spin_unlock(&vol_list_lock); + + /* Walk through all TCONs and refresh any expired cache entry */ + list_for_each_entry_safe(vi, nvi, &vols, rlist) { + spin_lock(&vi->smb_vol_lock); + server = get_tcp_server(&vi->smb_vol); + spin_unlock(&vi->smb_vol_lock); + + if (!server) + goto next_vol; + + get_tcons(server, &tcons); + rc = 0; + + list_for_each_entry_safe(tcon, ntcon, &tcons, ulist) { + /* + * Skip tcp server if any of its tcons failed to refresh + * (possibily due to reconnects). + */ + if (!rc) + rc = refresh_tcon(vi, tcon); + list_del_init(&tcon->ulist); cifs_put_tcon(tcon); } -next: - cifs_put_tcp_session(server, 0); + + put_tcp_server(server); + +next_vol: + list_del_init(&vi->rlist); + kref_put(&vi->refcnt, vol_release); } - queue_delayed_work(cifsiod_wq, &dc->dc_refresh, dc->dc_ttl * HZ); - mutex_unlock(&dc->dc_lock); + + spin_lock(&cache_ttl_lock); + queue_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ); + spin_unlock(&cache_ttl_lock); } diff --git a/fs/cifs/dfs_cache.h b/fs/cifs/dfs_cache.h index 76c732943f5f..99ee44f8ad07 100644 --- a/fs/cifs/dfs_cache.h +++ b/fs/cifs/dfs_cache.h @@ -24,7 +24,7 @@ struct dfs_cache_tgt_iterator { extern int dfs_cache_init(void); extern void dfs_cache_destroy(void); -extern const struct file_operations dfscache_proc_fops; +extern const struct proc_ops dfscache_proc_ops; extern int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *nls_codepage, int remap, diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index f26a48dd2e39..0ef099442f20 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -69,11 +69,10 @@ cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, return full_path; if (dfsplen) - strncpy(full_path, tcon->treeName, dfsplen); + memcpy(full_path, tcon->treeName, dfsplen); full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb); - strncpy(full_path + dfsplen + 1, vol->prepath, pplen); + memcpy(full_path + dfsplen + 1, vol->prepath, pplen); convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); - full_path[dfsplen + pplen] = 0; /* add trailing null */ return full_path; } @@ -126,7 +125,7 @@ cifs_bp_rename_retry: } rcu_read_unlock(); - full_path = kmalloc(namelen+1, GFP_KERNEL); + full_path = kmalloc(namelen+1, GFP_ATOMIC); if (full_path == NULL) return full_path; full_path[namelen] = 0; /* trailing null */ @@ -245,10 +244,8 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, *oplock = REQ_OPLOCK; full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { - rc = -ENOMEM; - goto out; - } + if (!full_path) + return -ENOMEM; if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open && (CIFS_UNIX_POSIX_PATH_OPS_CAP & @@ -358,13 +355,10 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, if (!tcon->unix_ext && (mode & S_IWUGO) == 0) create_options |= CREATE_OPTION_READONLY; - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = desired_access; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, create_options); oparms.disposition = disposition; oparms.path = full_path; oparms.fid = fid; @@ -739,10 +733,16 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, static int cifs_d_revalidate(struct dentry *direntry, unsigned int flags) { + struct inode *inode; + if (flags & LOOKUP_RCU) return -ECHILD; if (d_really_is_positive(direntry)) { + inode = d_inode(direntry); + if ((flags & LOOKUP_REVAL) && !CIFS_CACHE_READ(CIFS_I(inode))) + CIFS_I(inode)->time = 0; /* force reval */ + if (cifs_revalidate_dentry(direntry)) return 0; else { @@ -753,7 +753,7 @@ cifs_d_revalidate(struct dentry *direntry, unsigned int flags) * attributes will have been updated by * cifs_revalidate_dentry(). */ - if (IS_AUTOMOUNT(d_inode(direntry)) && + if (IS_AUTOMOUNT(inode) && !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { spin_lock(&direntry->d_lock); direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; diff --git a/fs/cifs/export.c b/fs/cifs/export.c index ce8b7f677c58..eb0bb8ca8e63 100644 --- a/fs/cifs/export.c +++ b/fs/cifs/export.c @@ -24,7 +24,7 @@ */ /* - * See Documentation/filesystems/nfs/Exporting + * See Documentation/filesystems/nfs/exporting.rst * and examples in fs/exportfs * * Since cifs is a network file system, an "fsid" must be included for diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 97090693d182..bc9516ab4b34 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -222,9 +222,6 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, if (!buf) return -ENOMEM; - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - /* O_SYNC also has bit for O_DSYNC so following check picks up either */ if (f_flags & O_SYNC) create_options |= CREATE_WRITE_THROUGH; @@ -235,7 +232,7 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = desired_access; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, create_options); oparms.disposition = disposition; oparms.path = full_path; oparms.fid = fid; @@ -253,6 +250,12 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb, xid, fid); + if (rc) { + server->ops->close(xid, tcon, fid); + if (rc == -ESTALE) + rc = -EOPENSTALE; + } + out: kfree(buf); return rc; @@ -275,6 +278,15 @@ cifs_has_mand_locks(struct cifsInodeInfo *cinode) return has_locks; } +void +cifs_down_write(struct rw_semaphore *sem) +{ + while (!down_write_trylock(sem)) + msleep(10); +} + +static void cifsFileInfo_put_work(struct work_struct *work); + struct cifsFileInfo * cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, struct tcon_link *tlink, __u32 oplock) @@ -300,9 +312,6 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, INIT_LIST_HEAD(&fdlocks->locks); fdlocks->cfile = cfile; cfile->llist = fdlocks; - down_write(&cinode->lock_sem); - list_add(&fdlocks->llist, &cinode->llist); - up_write(&cinode->lock_sem); cfile->count = 1; cfile->pid = current->tgid; @@ -312,6 +321,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, cfile->invalidHandle = false; cfile->tlink = cifs_get_tlink(tlink); INIT_WORK(&cfile->oplock_break, cifs_oplock_break); + INIT_WORK(&cfile->put, cifsFileInfo_put_work); mutex_init(&cfile->fh_mutex); spin_lock_init(&cfile->file_info_lock); @@ -326,6 +336,10 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, oplock = 0; } + cifs_down_write(&cinode->lock_sem); + list_add(&fdlocks->llist, &cinode->llist); + up_write(&cinode->lock_sem); + spin_lock(&tcon->open_file_lock); if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock) oplock = fid->pending_open->oplock; @@ -362,6 +376,41 @@ cifsFileInfo_get(struct cifsFileInfo *cifs_file) return cifs_file; } +static void cifsFileInfo_put_final(struct cifsFileInfo *cifs_file) +{ + struct inode *inode = d_inode(cifs_file->dentry); + struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifsLockInfo *li, *tmp; + struct super_block *sb = inode->i_sb; + + /* + * Delete any outstanding lock records. We'll lose them when the file + * is closed anyway. + */ + cifs_down_write(&cifsi->lock_sem); + list_for_each_entry_safe(li, tmp, &cifs_file->llist->locks, llist) { + list_del(&li->llist); + cifs_del_lock_waiters(li); + kfree(li); + } + list_del(&cifs_file->llist->llist); + kfree(cifs_file->llist); + up_write(&cifsi->lock_sem); + + cifs_put_tlink(cifs_file->tlink); + dput(cifs_file->dentry); + cifs_sb_deactive(sb); + kfree(cifs_file); +} + +static void cifsFileInfo_put_work(struct work_struct *work) +{ + struct cifsFileInfo *cifs_file = container_of(work, + struct cifsFileInfo, put); + + cifsFileInfo_put_final(cifs_file); +} + /** * cifsFileInfo_put - release a reference of file priv data * @@ -369,15 +418,15 @@ cifsFileInfo_get(struct cifsFileInfo *cifs_file) */ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) { - _cifsFileInfo_put(cifs_file, true); + _cifsFileInfo_put(cifs_file, true, true); } /** * _cifsFileInfo_put - release a reference of file priv data * * This may involve closing the filehandle @cifs_file out on the - * server. Must be called without holding tcon->open_file_lock and - * cifs_file->file_info_lock. + * server. Must be called without holding tcon->open_file_lock, + * cinode->open_file_lock and cifs_file->file_info_lock. * * If @wait_for_oplock_handler is true and we are releasing the last * reference, wait for any running oplock break handler of the file @@ -385,7 +434,8 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) * oplock break handler, you need to pass false. * */ -void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler) +void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, + bool wait_oplock_handler, bool offload) { struct inode *inode = d_inode(cifs_file->dentry); struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink); @@ -393,16 +443,16 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler) struct cifsInodeInfo *cifsi = CIFS_I(inode); struct super_block *sb = inode->i_sb; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - struct cifsLockInfo *li, *tmp; struct cifs_fid fid; struct cifs_pending_open open; bool oplock_break_cancelled; spin_lock(&tcon->open_file_lock); - + spin_lock(&cifsi->open_file_lock); spin_lock(&cifs_file->file_info_lock); if (--cifs_file->count > 0) { spin_unlock(&cifs_file->file_info_lock); + spin_unlock(&cifsi->open_file_lock); spin_unlock(&tcon->open_file_lock); return; } @@ -415,9 +465,7 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler) cifs_add_pending_open_locked(&fid, cifs_file->tlink, &open); /* remove it from the lists */ - spin_lock(&cifsi->open_file_lock); list_del(&cifs_file->flist); - spin_unlock(&cifsi->open_file_lock); list_del(&cifs_file->tlist); atomic_dec(&tcon->num_local_opens); @@ -434,6 +482,7 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler) cifs_set_oplock_level(cifsi, 0); } + spin_unlock(&cifsi->open_file_lock); spin_unlock(&tcon->open_file_lock); oplock_break_cancelled = wait_oplock_handler ? @@ -444,7 +493,9 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler) unsigned int xid; xid = get_xid(); - if (server->ops->close) + if (server->ops->close_getattr) + server->ops->close_getattr(xid, tcon, cifs_file); + else if (server->ops->close) server->ops->close(xid, tcon, &cifs_file->fid); _free_xid(xid); } @@ -454,24 +505,10 @@ void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler) cifs_del_pending_open(&open); - /* - * Delete any outstanding lock records. We'll lose them when the file - * is closed anyway. - */ - down_write(&cifsi->lock_sem); - list_for_each_entry_safe(li, tmp, &cifs_file->llist->locks, llist) { - list_del(&li->llist); - cifs_del_lock_waiters(li); - kfree(li); - } - list_del(&cifs_file->llist->llist); - kfree(cifs_file->llist); - up_write(&cifsi->lock_sem); - - cifs_put_tlink(cifs_file->tlink); - dput(cifs_file->dentry); - cifs_sb_deactive(sb); - kfree(cifs_file); + if (offload) + queue_work(fileinfo_put_wq, &cifs_file->put); + else + cifsFileInfo_put_final(cifs_file); } int cifs_open(struct inode *inode, struct file *file) @@ -712,8 +749,12 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush) desired_access = cifs_convert_flags(cfile->f_flags); - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; + /* O_SYNC also has bit for O_DSYNC so following check picks up either */ + if (cfile->f_flags & O_SYNC) + create_options |= CREATE_WRITE_THROUGH; + + if (cfile->f_flags & O_DIRECT) + create_options |= CREATE_NO_BUFFER; if (server->ops->get_lease_key) server->ops->get_lease_key(inode, &cfile->fid); @@ -721,7 +762,7 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush) oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = desired_access; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, create_options); oparms.disposition = disposition; oparms.path = full_path; oparms.fid = &cfile->fid; @@ -795,7 +836,7 @@ reopen_error_exit: int cifs_close(struct inode *inode, struct file *file) { if (file->private_data != NULL) { - cifsFileInfo_put(file->private_data); + _cifsFileInfo_put(file->private_data, true, false); file->private_data = NULL; } @@ -1021,7 +1062,7 @@ static void cifs_lock_add(struct cifsFileInfo *cfile, struct cifsLockInfo *lock) { struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); list_add_tail(&lock->llist, &cfile->llist->locks); up_write(&cinode->lock_sem); } @@ -1043,7 +1084,7 @@ cifs_lock_add_if(struct cifsFileInfo *cfile, struct cifsLockInfo *lock, try_again: exist = false; - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length, lock->type, lock->flags, &conf_lock, @@ -1066,7 +1107,7 @@ try_again: (lock->blist.next == &lock->blist)); if (!rc) goto try_again; - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); list_del_init(&lock->blist); } @@ -1119,7 +1160,7 @@ cifs_posix_lock_set(struct file *file, struct file_lock *flock) return rc; try_again: - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { up_write(&cinode->lock_sem); return rc; @@ -1325,7 +1366,7 @@ cifs_push_locks(struct cifsFileInfo *cfile) int rc = 0; /* we are going to update can_cache_brlcks here - need a write access */ - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { up_write(&cinode->lock_sem); return rc; @@ -1516,7 +1557,7 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, if (!buf) return -ENOMEM; - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); for (i = 0; i < 2; i++) { cur = buf; num = 0; @@ -1668,7 +1709,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, rc = server->ops->mand_unlock_range(cfile, flock, xid); out: - if (flock->fl_flags & FL_POSIX) { + if ((flock->fl_flags & FL_POSIX) || (flock->fl_flags & FL_FLOCK)) { /* * If this is a request to remove all locks because we * are closing the file, it doesn't matter if the @@ -1685,6 +1726,52 @@ out: return rc; } +int cifs_flock(struct file *file, int cmd, struct file_lock *fl) +{ + int rc, xid; + int lock = 0, unlock = 0; + bool wait_flag = false; + bool posix_lck = false; + struct cifs_sb_info *cifs_sb; + struct cifs_tcon *tcon; + struct cifsFileInfo *cfile; + __u32 type; + + rc = -EACCES; + xid = get_xid(); + + if (!(fl->fl_flags & FL_FLOCK)) + return -ENOLCK; + + cfile = (struct cifsFileInfo *)file->private_data; + tcon = tlink_tcon(cfile->tlink); + + cifs_read_flock(fl, &type, &lock, &unlock, &wait_flag, + tcon->ses->server); + cifs_sb = CIFS_FILE_SB(file); + + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && + ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + posix_lck = true; + + if (!lock && !unlock) { + /* + * if no lock or unlock then nothing to do since we do not + * know what it is + */ + free_xid(xid); + return -EOPNOTSUPP; + } + + rc = cifs_setlk(file, fl, type, wait_flag, posix_lck, lock, unlock, + xid); + free_xid(xid); + return rc; + + +} + int cifs_lock(struct file *file, int cmd, struct file_lock *flock) { int rc, xid; @@ -1693,9 +1780,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) bool posix_lck = false; struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; - struct cifsInodeInfo *cinode; struct cifsFileInfo *cfile; - __u16 netfid; __u32 type; rc = -EACCES; @@ -1711,8 +1796,6 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) cifs_read_flock(flock, &type, &lock, &unlock, &wait_flag, tcon->ses->server); cifs_sb = CIFS_FILE_SB(file); - netfid = cfile->fid.netfid; - cinode = CIFS_I(file_inode(file)); if (cap_unix(tcon->ses) && (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && @@ -1764,7 +1847,6 @@ cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data, int rc = 0; unsigned int bytes_written = 0; unsigned int total_written; - struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; struct TCP_Server_Info *server; unsigned int xid; @@ -1772,8 +1854,6 @@ cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data, struct cifsInodeInfo *cifsi = CIFS_I(d_inode(dentry)); struct cifs_io_parms io_parms; - cifs_sb = CIFS_SB(dentry->d_sb); - cifs_dbg(FYI, "write %zd bytes to offset %lld of %pd\n", write_size, *offset, dentry); @@ -1847,13 +1927,12 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode, { struct cifsFileInfo *open_file = NULL; struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_inode->vfs_inode.i_sb); - struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); /* only filter by fsuid on multiuser mounts */ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) fsuid_only = false; - spin_lock(&tcon->open_file_lock); + spin_lock(&cifs_inode->open_file_lock); /* we could simply get the first_list_entry since write-only entries are always at the end of the list but since the first entry might have a close pending, we go through the whole list */ @@ -1865,7 +1944,7 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode, /* found a good file */ /* lock it so it will not be closed on us */ cifsFileInfo_get(open_file); - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); return open_file; } /* else might as well continue, and look for another, or simply have the caller reopen it @@ -1873,7 +1952,7 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode, } else /* write only file */ break; /* write only files are last so must be done */ } - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); return NULL; } @@ -1884,7 +1963,6 @@ cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only, { struct cifsFileInfo *open_file, *inv_file = NULL; struct cifs_sb_info *cifs_sb; - struct cifs_tcon *tcon; bool any_available = false; int rc = -EBADF; unsigned int refind = 0; @@ -1904,16 +1982,15 @@ cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only, } cifs_sb = CIFS_SB(cifs_inode->vfs_inode.i_sb); - tcon = cifs_sb_master_tcon(cifs_sb); /* only filter by fsuid on multiuser mounts */ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) fsuid_only = false; - spin_lock(&tcon->open_file_lock); + spin_lock(&cifs_inode->open_file_lock); refind_writable: if (refind > MAX_REOPEN_ATT) { - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); return rc; } list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { @@ -1925,7 +2002,7 @@ refind_writable: if (!open_file->invalidHandle) { /* found a good writable file */ cifsFileInfo_get(open_file); - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); *ret_file = open_file; return 0; } else { @@ -1945,7 +2022,7 @@ refind_writable: cifsFileInfo_get(inv_file); } - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); if (inv_file) { rc = cifs_reopen_file(inv_file, false); @@ -1960,7 +2037,7 @@ refind_writable: cifsFileInfo_put(inv_file); ++refind; inv_file = NULL; - spin_lock(&tcon->open_file_lock); + spin_lock(&cifs_inode->open_file_lock); goto refind_writable; } @@ -1980,6 +2057,77 @@ find_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only) return cfile; } +int +cifs_get_writable_path(struct cifs_tcon *tcon, const char *name, + struct cifsFileInfo **ret_file) +{ + struct list_head *tmp; + struct cifsFileInfo *cfile; + struct cifsInodeInfo *cinode; + char *full_path; + + *ret_file = NULL; + + spin_lock(&tcon->open_file_lock); + list_for_each(tmp, &tcon->openFileList) { + cfile = list_entry(tmp, struct cifsFileInfo, + tlist); + full_path = build_path_from_dentry(cfile->dentry); + if (full_path == NULL) { + spin_unlock(&tcon->open_file_lock); + return -ENOMEM; + } + if (strcmp(full_path, name)) { + kfree(full_path); + continue; + } + + kfree(full_path); + cinode = CIFS_I(d_inode(cfile->dentry)); + spin_unlock(&tcon->open_file_lock); + return cifs_get_writable_file(cinode, 0, ret_file); + } + + spin_unlock(&tcon->open_file_lock); + return -ENOENT; +} + +int +cifs_get_readable_path(struct cifs_tcon *tcon, const char *name, + struct cifsFileInfo **ret_file) +{ + struct list_head *tmp; + struct cifsFileInfo *cfile; + struct cifsInodeInfo *cinode; + char *full_path; + + *ret_file = NULL; + + spin_lock(&tcon->open_file_lock); + list_for_each(tmp, &tcon->openFileList) { + cfile = list_entry(tmp, struct cifsFileInfo, + tlist); + full_path = build_path_from_dentry(cfile->dentry); + if (full_path == NULL) { + spin_unlock(&tcon->open_file_lock); + return -ENOMEM; + } + if (strcmp(full_path, name)) { + kfree(full_path); + continue; + } + + kfree(full_path); + cinode = CIFS_I(d_inode(cfile->dentry)); + spin_unlock(&tcon->open_file_lock); + *ret_file = find_readable_file(cinode, 0); + return *ret_file ? 0 : -ENOENT; + } + + spin_unlock(&tcon->open_file_lock); + return -ENOENT; +} + static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) { struct address_space *mapping = page->mapping; @@ -2445,8 +2593,10 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); rc = file_write_and_wait_range(file, start, end); - if (rc) + if (rc) { + trace_cifs_fsync_err(inode->i_ino, rc); return rc; + } xid = get_xid(); @@ -2484,8 +2634,10 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); rc = file_write_and_wait_range(file, start, end); - if (rc) + if (rc) { + trace_cifs_fsync_err(file_inode(file)->i_ino, rc); return rc; + } xid = get_xid(); @@ -2518,7 +2670,8 @@ int cifs_flush(struct file *file, fl_owner_t id) rc = filemap_write_and_wait(inode->i_mapping); cifs_dbg(FYI, "Flush inode %p file %p rc %d\n", inode, file, rc); - + if (rc) + trace_cifs_flush_err(inode->i_ino, rc); return rc; } @@ -2683,9 +2836,17 @@ cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list, if (!rc) { if (wdata->cfile->invalidHandle) rc = -EAGAIN; - else + else { +#ifdef CONFIG_CIFS_SMB_DIRECT + if (wdata->mr) { + wdata->mr->need_invalidate = true; + smbd_deregister_mr(wdata->mr); + wdata->mr = NULL; + } +#endif rc = server->ops->async_writev(wdata, cifs_uncached_writedata_release); + } } /* If the write was successfully sent, we are done */ @@ -2759,7 +2920,7 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from, "direct_writev couldn't get user pages " "(rc=%zd) iter type %d iov_offset %zd " "count %zd\n", - result, from->type, + result, iov_iter_type(from), from->iov_offset, from->count); dump_stack(); @@ -2970,7 +3131,7 @@ static ssize_t __cifs_writev( * In this case, fall back to non-direct write function. * this could be improved by getting pages directly in ITER_KVEC */ - if (direct && from->type & ITER_KVEC) { + if (direct && iov_iter_is_kvec(from)) { cifs_dbg(FYI, "use non-direct cifs_writev for kvec I/O\n"); direct = false; } @@ -3408,8 +3569,16 @@ static int cifs_resend_rdata(struct cifs_readdata *rdata, if (!rc) { if (rdata->cfile->invalidHandle) rc = -EAGAIN; - else + else { +#ifdef CONFIG_CIFS_SMB_DIRECT + if (rdata->mr) { + rdata->mr->need_invalidate = true; + smbd_deregister_mr(rdata->mr); + rdata->mr = NULL; + } +#endif rc = server->ops->async_readv(rdata); + } } /* If the read was successfully sent, we are done */ @@ -3482,7 +3651,7 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file, "couldn't get user pages (rc=%zd)" " iter type %d" " iov_offset %zd count %zd\n", - result, direct_iov.type, + result, iov_iter_type(&direct_iov), direct_iov.iov_offset, direct_iov.count); dump_stack(); @@ -3577,10 +3746,8 @@ collect_uncached_read_data(struct cifs_aio_ctx *ctx) struct cifs_readdata *rdata, *tmp; struct iov_iter *to = &ctx->iter; struct cifs_sb_info *cifs_sb; - struct cifs_tcon *tcon; int rc; - tcon = tlink_tcon(ctx->cfile->tlink); cifs_sb = CIFS_SB(ctx->cfile->dentry->d_sb); mutex_lock(&ctx->aio_mutex); @@ -3695,7 +3862,7 @@ static ssize_t __cifs_readv( * fall back to data copy read path * this could be improved by getting pages directly in ITER_KVEC */ - if (direct && to->type & ITER_KVEC) { + if (direct && iov_iter_is_kvec(to)) { cifs_dbg(FYI, "use non-direct cifs_user_readv for kvec I/O\n"); direct = false; } @@ -4399,17 +4566,15 @@ static int cifs_readpage(struct file *file, struct page *page) static int is_inode_writable(struct cifsInodeInfo *cifs_inode) { struct cifsFileInfo *open_file; - struct cifs_tcon *tcon = - cifs_sb_master_tcon(CIFS_SB(cifs_inode->vfs_inode.i_sb)); - spin_lock(&tcon->open_file_lock); + spin_lock(&cifs_inode->open_file_lock); list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { if (OPEN_FMODE(open_file->f_flags) & FMODE_WRITE) { - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); return 1; } } - spin_unlock(&tcon->open_file_lock); + spin_unlock(&cifs_inode->open_file_lock); return 0; } @@ -4567,12 +4732,13 @@ void cifs_oplock_break(struct work_struct *work) struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; int rc = 0; + bool purge_cache = false; wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS, TASK_UNINTERRUPTIBLE); - server->ops->downgrade_oplock(server, cinode, - test_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, &cinode->flags)); + server->ops->downgrade_oplock(server, cinode, cfile->oplock_level, + cfile->oplock_epoch, &purge_cache); if (!CIFS_CACHE_WRITE(cinode) && CIFS_CACHE_READ(cinode) && cifs_has_mand_locks(cinode)) { @@ -4587,18 +4753,21 @@ void cifs_oplock_break(struct work_struct *work) else break_lease(inode, O_WRONLY); rc = filemap_fdatawrite(inode->i_mapping); - if (!CIFS_CACHE_READ(cinode)) { + if (!CIFS_CACHE_READ(cinode) || purge_cache) { rc = filemap_fdatawait(inode->i_mapping); mapping_set_error(inode->i_mapping, rc); cifs_zap_mapping(inode); } cifs_dbg(FYI, "Oplock flush inode %p rc %d\n", inode, rc); + if (CIFS_CACHE_WRITE(cinode)) + goto oplock_break_ack; } rc = cifs_push_locks(cfile); if (rc) cifs_dbg(VFS, "Push locks rc = %d\n", rc); +oplock_break_ack: /* * releasing stale oplock after recent reconnect of smb session using * a now incorrect file handle is not a data integrity issue but do @@ -4610,7 +4779,7 @@ void cifs_oplock_break(struct work_struct *work) cinode); cifs_dbg(FYI, "Oplock release rc = %d\n", rc); } - _cifsFileInfo_put(cfile, false /* do not wait for ourself */); + _cifsFileInfo_put(cfile, false /* do not wait for ourself */, false); cifs_done_oplock_break(cinode); } diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 56ca4b8ccaba..b5e6635c578e 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -113,6 +113,7 @@ cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) } /* revalidate if mtime or size have changed */ + fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && cifs_i->server_eof == fattr->cf_eof) { cifs_dbg(FYI, "%s: inode %llu is unchanged\n", @@ -162,8 +163,11 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) cifs_revalidate_cache(inode, fattr); spin_lock(&inode->i_lock); + fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); + fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); + fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); /* we do not want atime to be less than mtime, it broke some apps */ - if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime)) + if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) inode->i_atime = fattr->cf_mtime; else inode->i_atime = fattr->cf_atime; @@ -329,8 +333,7 @@ cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; fattr->cf_uid = cifs_sb->mnt_uid; fattr->cf_gid = cifs_sb->mnt_gid; - ktime_get_real_ts64(&fattr->cf_mtime); - fattr->cf_mtime = timespec64_trunc(fattr->cf_mtime, sb->s_time_gran); + ktime_get_coarse_real_ts64(&fattr->cf_mtime); fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; fattr->cf_nlink = 2; fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; @@ -414,6 +417,7 @@ int cifs_get_inode_info_unix(struct inode **pinode, /* if uniqueid is different, return error */ if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { + CIFS_I(*pinode)->time = 0; /* force reval */ rc = -ESTALE; goto cgiiu_exit; } @@ -421,6 +425,7 @@ int cifs_get_inode_info_unix(struct inode **pinode, /* if filetype is different, return error */ if (unlikely(((*pinode)->i_mode & S_IFMT) != (fattr.cf_mode & S_IFMT))) { + CIFS_I(*pinode)->time = 0; /* force reval */ rc = -ESTALE; goto cgiiu_exit; } @@ -470,9 +475,7 @@ cifs_sfu_type(struct cifs_fattr *fattr, const char *path, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_READ; - oparms.create_options = CREATE_NOT_DIR; - if (backup_cred(cifs_sb)) - oparms.create_options |= CREATE_OPEN_BACKUP_INTENT; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_OPEN; oparms.path = path; oparms.fid = &fid; @@ -607,10 +610,8 @@ cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, if (info->LastAccessTime) fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); - else { - ktime_get_real_ts64(&fattr->cf_atime); - fattr->cf_atime = timespec64_trunc(fattr->cf_atime, sb->s_time_gran); - } + else + ktime_get_coarse_real_ts64(&fattr->cf_atime); fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); @@ -725,22 +726,138 @@ static __u64 simple_hashstr(const char *str) return hash; } +/** + * cifs_backup_query_path_info - SMB1 fallback code to get ino + * + * Fallback code to get file metadata when we don't have access to + * @full_path (EACCESS) and have backup creds. + * + * @data will be set to search info result buffer + * @resp_buf will be set to cifs resp buf and needs to be freed with + * cifs_buf_release() when done with @data. + */ +static int +cifs_backup_query_path_info(int xid, + struct cifs_tcon *tcon, + struct super_block *sb, + const char *full_path, + void **resp_buf, + FILE_ALL_INFO **data) +{ + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); + struct cifs_search_info info = {0}; + u16 flags; + int rc; + + *resp_buf = NULL; + info.endOfSearch = false; + if (tcon->unix_ext) + info.info_level = SMB_FIND_FILE_UNIX; + else if ((tcon->ses->capabilities & + tcon->ses->server->vals->cap_nt_find) == 0) + info.info_level = SMB_FIND_FILE_INFO_STANDARD; + else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) + info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; + else /* no srvino useful for fallback to some netapp */ + info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; + + flags = CIFS_SEARCH_CLOSE_ALWAYS | + CIFS_SEARCH_CLOSE_AT_END | + CIFS_SEARCH_BACKUP_SEARCH; + + rc = CIFSFindFirst(xid, tcon, full_path, + cifs_sb, NULL, flags, &info, false); + if (rc) + return rc; + + *resp_buf = (void *)info.ntwrk_buf_start; + *data = (FILE_ALL_INFO *)info.srch_entries_start; + return 0; +} + +static void +cifs_set_fattr_ino(int xid, + struct cifs_tcon *tcon, + struct super_block *sb, + struct inode **inode, + const char *full_path, + FILE_ALL_INFO *data, + struct cifs_fattr *fattr) +{ + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); + struct TCP_Server_Info *server = tcon->ses->server; + int rc; + + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { + if (*inode) + fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; + else + fattr->cf_uniqueid = iunique(sb, ROOT_I); + return; + } + + /* + * If we have an inode pass a NULL tcon to ensure we don't + * make a round trip to the server. This only works for SMB2+. + */ + rc = server->ops->get_srv_inum(xid, + *inode ? NULL : tcon, + cifs_sb, full_path, + &fattr->cf_uniqueid, + data); + if (rc) { + /* + * If that fails reuse existing ino or generate one + * and disable server ones + */ + if (*inode) + fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; + else { + fattr->cf_uniqueid = iunique(sb, ROOT_I); + cifs_autodisable_serverino(cifs_sb); + } + return; + } + + /* If no errors, check for zero root inode (invalid) */ + if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { + cifs_dbg(FYI, "Invalid (0) inodenum\n"); + if (*inode) { + /* reuse */ + fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; + } else { + /* make an ino by hashing the UNC */ + fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; + fattr->cf_uniqueid = simple_hashstr(tcon->treeName); + } + } +} + +static inline bool is_inode_cache_good(struct inode *ino) +{ + return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; +} + int -cifs_get_inode_info(struct inode **inode, const char *full_path, - FILE_ALL_INFO *data, struct super_block *sb, int xid, +cifs_get_inode_info(struct inode **inode, + const char *full_path, + FILE_ALL_INFO *in_data, + struct super_block *sb, int xid, const struct cifs_fid *fid) { - __u16 srchflgs; - int rc = 0, tmprc = ENOSYS; + struct cifs_tcon *tcon; struct TCP_Server_Info *server; struct tcon_link *tlink; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - char *buf = NULL; bool adjust_tz = false; - struct cifs_fattr fattr; - struct cifs_search_info *srchinf = NULL; + struct cifs_fattr fattr = {0}; bool symlink = false; + FILE_ALL_INFO *data = in_data; + FILE_ALL_INFO *tmp_data = NULL; + void *smb1_backup_rsp_buf = NULL; + int rc = 0; + int tmprc = 0; tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) @@ -748,142 +865,88 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, tcon = tlink_tcon(tlink); server = tcon->ses->server; - cifs_dbg(FYI, "Getting info on %s\n", full_path); + /* + * 1. Fetch file metadata if not provided (data) + */ - if ((data == NULL) && (*inode != NULL)) { - if (CIFS_CACHE_READ(CIFS_I(*inode)) && - CIFS_I(*inode)->time != 0) { + if (!data) { + if (is_inode_cache_good(*inode)) { cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); - goto cgii_exit; - } - } - - /* if inode info is not passed, get it from server */ - if (data == NULL) { - if (!server->ops->query_path_info) { - rc = -ENOSYS; - goto cgii_exit; + goto out; } - buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); - if (buf == NULL) { + tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); + if (!tmp_data) { rc = -ENOMEM; - goto cgii_exit; + goto out; } - data = (FILE_ALL_INFO *)buf; - rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path, - data, &adjust_tz, &symlink); + rc = server->ops->query_path_info(xid, tcon, cifs_sb, + full_path, tmp_data, + &adjust_tz, &symlink); + data = tmp_data; } - if (!rc) { - cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, - symlink); - } else if (rc == -EREMOTE) { + /* + * 2. Convert it to internal cifs metadata (fattr) + */ + + switch (rc) { + case 0: + cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); + break; + case -EREMOTE: + /* DFS link, no metadata available on this server */ cifs_create_dfs_fattr(&fattr, sb); rc = 0; - } else if ((rc == -EACCES) && backup_cred(cifs_sb) && - (strcmp(server->vals->version_string, SMB1_VERSION_STRING) - == 0)) { + break; + case -EACCES: /* - * For SMB2 and later the backup intent flag is already - * sent if needed on open and there is no path based - * FindFirst operation to use to retry with + * perm errors, try again with backup flags if possible + * + * For SMB2 and later the backup intent flag + * is already sent if needed on open and there + * is no path based FindFirst operation to use + * to retry with */ + if (backup_cred(cifs_sb) && is_smb1_server(server)) { + /* for easier reading */ + FILE_DIRECTORY_INFO *fdi; + SEARCH_ID_FULL_DIR_INFO *si; + + rc = cifs_backup_query_path_info(xid, tcon, sb, + full_path, + &smb1_backup_rsp_buf, + &data); + if (rc) + goto out; - srchinf = kzalloc(sizeof(struct cifs_search_info), - GFP_KERNEL); - if (srchinf == NULL) { - rc = -ENOMEM; - goto cgii_exit; - } + fdi = (FILE_DIRECTORY_INFO *)data; + si = (SEARCH_ID_FULL_DIR_INFO *)data; - srchinf->endOfSearch = false; - if (tcon->unix_ext) - srchinf->info_level = SMB_FIND_FILE_UNIX; - else if ((tcon->ses->capabilities & - tcon->ses->server->vals->cap_nt_find) == 0) - srchinf->info_level = SMB_FIND_FILE_INFO_STANDARD; - else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) - srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; - else /* no srvino useful for fallback to some netapp */ - srchinf->info_level = SMB_FIND_FILE_DIRECTORY_INFO; - - srchflgs = CIFS_SEARCH_CLOSE_ALWAYS | - CIFS_SEARCH_CLOSE_AT_END | - CIFS_SEARCH_BACKUP_SEARCH; - - rc = CIFSFindFirst(xid, tcon, full_path, - cifs_sb, NULL, srchflgs, srchinf, false); - if (!rc) { - data = (FILE_ALL_INFO *)srchinf->srch_entries_start; + cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); + fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); + /* uniqueid set, skip get inum step */ + goto handle_mnt_opt; + } else { + /* nothing we can do, bail out */ + goto out; + } + break; + default: + cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); + goto out; + } - cifs_dir_info_to_fattr(&fattr, - (FILE_DIRECTORY_INFO *)data, cifs_sb); - fattr.cf_uniqueid = le64_to_cpu( - ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId); + /* + * 3. Get or update inode number (fattr.cf_uniqueid) + */ - cifs_buf_release(srchinf->ntwrk_buf_start); - } - kfree(srchinf); - if (rc) - goto cgii_exit; - } else - goto cgii_exit; + cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); /* - * If an inode wasn't passed in, then get the inode number - * - * Is an i_ino of zero legal? Can we use that to check if the server - * supports returning inode numbers? Are there other sanity checks we - * can use to ensure that the server is really filling in that field? + * 4. Tweak fattr based on mount options */ - if (*inode == NULL) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { - if (server->ops->get_srv_inum) - tmprc = server->ops->get_srv_inum(xid, - tcon, cifs_sb, full_path, - &fattr.cf_uniqueid, data); - if (tmprc) { - cifs_dbg(FYI, "GetSrvInodeNum rc %d\n", - tmprc); - fattr.cf_uniqueid = iunique(sb, ROOT_I); - cifs_autodisable_serverino(cifs_sb); - } else if ((fattr.cf_uniqueid == 0) && - strlen(full_path) == 0) { - /* some servers ret bad root ino ie 0 */ - cifs_dbg(FYI, "Invalid (0) inodenum\n"); - fattr.cf_flags |= - CIFS_FATTR_FAKE_ROOT_INO; - fattr.cf_uniqueid = - simple_hashstr(tcon->treeName); - } - } else - fattr.cf_uniqueid = iunique(sb, ROOT_I); - } else { - if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) - && server->ops->get_srv_inum) { - /* - * Pass a NULL tcon to ensure we don't make a round - * trip to the server. This only works for SMB2+. - */ - tmprc = server->ops->get_srv_inum(xid, - NULL, cifs_sb, full_path, - &fattr.cf_uniqueid, data); - if (tmprc) - fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; - else if ((fattr.cf_uniqueid == 0) && - strlen(full_path) == 0) { - /* - * Reuse existing root inode num since - * inum zero for root causes ls of . and .. to - * not be returned - */ - cifs_dbg(FYI, "Srv ret 0 inode num for root\n"); - fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; - } - } else - fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; - } +handle_mnt_opt: /* query for SFU type info if supported and needed */ if (fattr.cf_cifsattrs & ATTR_SYSTEM && cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { @@ -893,12 +956,21 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, } /* fill in 0777 bits from ACL */ - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { - rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid); + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { + rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, + full_path, fid); + if (rc) { + cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", + __func__, rc); + goto out; + } + } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { + rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, + full_path, fid); if (rc) { cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", __func__, rc); - goto cgii_exit; + goto out; } } @@ -914,6 +986,10 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); } + /* + * 5. Update inode with final fattr data + */ + if (!*inode) { *inode = cifs_iget(sb, &fattr); if (!*inode) @@ -924,26 +1000,25 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, /* if uniqueid is different, return error */ if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { + CIFS_I(*inode)->time = 0; /* force reval */ rc = -ESTALE; - goto cgii_exit; + goto out; } /* if filetype is different, return error */ if (unlikely(((*inode)->i_mode & S_IFMT) != (fattr.cf_mode & S_IFMT))) { + CIFS_I(*inode)->time = 0; /* force reval */ rc = -ESTALE; - goto cgii_exit; + goto out; } cifs_fattr_to_inode(*inode, &fattr); } - -cgii_exit: - if ((*inode) && ((*inode)->i_ino == 0)) - cifs_dbg(FYI, "inode number of zero returned\n"); - - kfree(buf); +out: + cifs_buf_release(smb1_backup_rsp_buf); cifs_put_tlink(tlink); + kfree(tmp_data); return rc; } @@ -1208,7 +1283,7 @@ cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; - oparms.create_options = CREATE_NOT_DIR; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_OPEN; oparms.path = full_path; oparms.fid = &fid; @@ -1573,7 +1648,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) struct TCP_Server_Info *server; char *full_path; - cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n", + cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", mode, inode); cifs_sb = CIFS_SB(inode->i_sb); @@ -1613,13 +1688,14 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) } /* BB add setting the equivalent of mode via CreateX w/ACLs */ - rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb); + rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); if (rc) { cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); d_drop(direntry); goto mkdir_out; } + /* TODO: skip this for smb2/smb3 */ rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, xid); mkdir_out: @@ -1745,7 +1821,7 @@ cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, oparms.cifs_sb = cifs_sb; /* open the file to be renamed -- we need DELETE perms */ oparms.desired_access = DELETE; - oparms.create_options = CREATE_NOT_DIR; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_OPEN; oparms.path = from_path; oparms.fid = &fid; @@ -2151,7 +2227,7 @@ int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, return -ENOTSUPP; } -static int cifs_truncate_page(struct address_space *mapping, loff_t from) +int cifs_truncate_page(struct address_space *mapping, loff_t from) { pgoff_t index = from >> PAGE_SHIFT; unsigned offset = from & (PAGE_SIZE - 1); @@ -2168,7 +2244,7 @@ static int cifs_truncate_page(struct address_space *mapping, loff_t from) return rc; } -static void cifs_setsize(struct inode *inode, loff_t offset) +void cifs_setsize(struct inode *inode, loff_t offset) { struct cifsInodeInfo *cifs_i = CIFS_I(inode); @@ -2461,9 +2537,9 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); cifsFileInfo_put(wfile); if (rc) - return rc; + goto cifs_setattr_exit; } else if (rc != -EBADF) - return rc; + goto cifs_setattr_exit; else rc = 0; } @@ -2480,7 +2556,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) if (attrs->ia_valid & ATTR_GID) gid = attrs->ia_gid; - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { + if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || + (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { if (uid_valid(uid) || gid_valid(gid)) { rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, uid, gid); @@ -2501,7 +2578,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) if (attrs->ia_valid & ATTR_MODE) { mode = attrs->ia_mode; rc = 0; - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { + if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || + (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { rc = id_mode_to_cifs_acl(inode, full_path, mode, INVALID_UID, INVALID_GID); if (rc) { diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 76ddd98b6298..4a73e63c4d43 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -65,7 +65,7 @@ static long cifs_ioctl_query_info(unsigned int xid, struct file *filep, if (tcon->ses->server->ops->ioctl_query_info) rc = tcon->ses->server->ops->ioctl_query_info( - xid, tcon, utf16_path, + xid, tcon, cifs_sb, utf16_path, filep->private_data ? 0 : 1, p); else rc = -EOPNOTSUPP; @@ -164,10 +164,12 @@ static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon, long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) { struct inode *inode = file_inode(filep); + struct smb3_key_debug_info pkey_inf; int rc = -ENOTTY; /* strange error - but the precedent */ unsigned int xid; struct cifsFileInfo *pSMBFile = filep->private_data; struct cifs_tcon *tcon; + struct cifs_sb_info *cifs_sb; __u64 ExtAttrBits = 0; __u64 caps; @@ -270,6 +272,49 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) else rc = -EOPNOTSUPP; break; + case CIFS_DUMP_KEY: + if (pSMBFile == NULL) + break; + if (!capable(CAP_SYS_ADMIN)) { + rc = -EACCES; + break; + } + + tcon = tlink_tcon(pSMBFile->tlink); + if (!smb3_encryption_required(tcon)) { + rc = -EOPNOTSUPP; + break; + } + pkey_inf.cipher_type = + le16_to_cpu(tcon->ses->server->cipher_type); + pkey_inf.Suid = tcon->ses->Suid; + memcpy(pkey_inf.auth_key, tcon->ses->auth_key.response, + 16 /* SMB2_NTLMV2_SESSKEY_SIZE */); + memcpy(pkey_inf.smb3decryptionkey, + tcon->ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE); + memcpy(pkey_inf.smb3encryptionkey, + tcon->ses->smb3encryptionkey, SMB3_SIGN_KEY_SIZE); + if (copy_to_user((void __user *)arg, &pkey_inf, + sizeof(struct smb3_key_debug_info))) + rc = -EFAULT; + else + rc = 0; + break; + case CIFS_IOC_NOTIFY: + if (!S_ISDIR(inode->i_mode)) { + /* Notify can only be done on directories */ + rc = -EOPNOTSUPP; + break; + } + cifs_sb = CIFS_SB(inode->i_sb); + tcon = tlink_tcon(cifs_sb_tlink(cifs_sb)); + if (tcon && tcon->ses->server->ops->notify) { + rc = tcon->ses->server->ops->notify(xid, + filep, (void __user *)arg); + cifs_dbg(FYI, "ioctl notify rc %d\n", rc); + } else + rc = -EOPNOTSUPP; + break; default: cifs_dbg(FYI, "unsupported ioctl\n"); break; diff --git a/fs/cifs/link.c b/fs/cifs/link.c index b736acd3917b..852aa00ec729 100644 --- a/fs/cifs/link.c +++ b/fs/cifs/link.c @@ -315,7 +315,7 @@ cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_READ; - oparms.create_options = CREATE_NOT_DIR; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_OPEN; oparms.path = path; oparms.fid = &fid; @@ -353,15 +353,11 @@ cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid fid; struct cifs_open_parms oparms; struct cifs_io_parms io_parms; - int create_options = CREATE_NOT_DIR; - - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_WRITE; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_CREATE; oparms.path = path; oparms.fid = &fid; @@ -402,9 +398,7 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_READ; - oparms.create_options = CREATE_NOT_DIR; - if (backup_cred(cifs_sb)) - oparms.create_options |= CREATE_OPEN_BACKUP_INTENT; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_OPEN; oparms.fid = &fid; oparms.reconnect = false; @@ -457,14 +451,10 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid fid; struct cifs_open_parms oparms; struct cifs_io_parms io_parms; - int create_options = CREATE_NOT_DIR; __le16 *utf16_path; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct kvec iov[2]; - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - cifs_dbg(FYI, "%s: path: %s\n", __func__, path); utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); @@ -474,7 +464,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_WRITE; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_CREATE; oparms.fid = &fid; oparms.reconnect = false; diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index f383877a6511..40ca394fd5de 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -488,21 +488,10 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv) set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &pCifsInode->flags); - /* - * Set flag if the server downgrades the oplock - * to L2 else clear. - */ - if (pSMB->OplockLevel) - set_bit( - CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, - &pCifsInode->flags); - else - clear_bit( - CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, - &pCifsInode->flags); - - cifs_queue_oplock_break(netfile); + netfile->oplock_epoch = 0; + netfile->oplock_level = pSMB->OplockLevel; netfile->oplock_break_cancelled = false; + cifs_queue_oplock_break(netfile); spin_unlock(&tcon->open_file_lock); spin_unlock(&cifs_tcp_ses_lock); @@ -1011,3 +1000,25 @@ void extract_unc_hostname(const char *unc, const char **h, size_t *len) *h = unc; *len = end - unc; } + +/** + * copy_path_name - copy src path to dst, possibly truncating + * + * returns number of bytes written (including trailing nul) + */ +int copy_path_name(char *dst, const char *src) +{ + int name_len; + + /* + * PATH_MAX includes nul, so if strlen(src) >= PATH_MAX it + * will truncate and strlen(dst) will be PATH_MAX-1 + */ + name_len = strscpy(dst, src, PATH_MAX); + if (WARN_ON_ONCE(name_len < 0)) + name_len = PATH_MAX-1; + + /* we count the trailing nul */ + name_len++; + return name_len; +} diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index ed92958e842d..9b41436fb8db 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -117,10 +117,6 @@ static const struct smb_to_posix_error mapping_table_ERRSRV[] = { {0, 0} }; -static const struct smb_to_posix_error mapping_table_ERRHRD[] = { - {0, 0} -}; - /* * Convert a string containing text IPv4 or IPv6 address to binary form. * @@ -949,8 +945,8 @@ static const int total_days_of_prev_months[] = { struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset) { struct timespec64 ts; - time64_t sec; - int min, days, month, year; + time64_t sec, days; + int min, day, month, year; u16 date = le16_to_cpu(le_date); u16 time = le16_to_cpu(le_time); SMB_TIME *st = (SMB_TIME *)&time; @@ -966,15 +962,15 @@ struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset) sec += 60 * 60 * st->Hours; if (st->Hours > 24) cifs_dbg(VFS, "illegal hours %d\n", st->Hours); - days = sd->Day; + day = sd->Day; month = sd->Month; - if (days < 1 || days > 31 || month < 1 || month > 12) { - cifs_dbg(VFS, "illegal date, month %d day: %d\n", month, days); - days = clamp(days, 1, 31); + if (day < 1 || day > 31 || month < 1 || month > 12) { + cifs_dbg(VFS, "illegal date, month %d day: %d\n", month, day); + day = clamp(day, 1, 31); month = clamp(month, 1, 12); } month -= 1; - days += total_days_of_prev_months[month]; + days = day + total_days_of_prev_months[month]; days += 3652; /* account for difference in days between 1980 and 1970 */ year = sd->Year; days += year * 365; diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 3925a7bfc74d..ba9dadf3be24 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -139,6 +139,28 @@ retry: dput(dentry); } +static bool reparse_file_needs_reval(const struct cifs_fattr *fattr) +{ + if (!(fattr->cf_cifsattrs & ATTR_REPARSE)) + return false; + /* + * The DFS tags should be only intepreted by server side as per + * MS-FSCC 2.1.2.1, but let's include them anyway. + * + * Besides, if cf_cifstag is unset (0), then we still need it to be + * revalidated to know exactly what reparse point it is. + */ + switch (fattr->cf_cifstag) { + case IO_REPARSE_TAG_DFS: + case IO_REPARSE_TAG_DFSR: + case IO_REPARSE_TAG_SYMLINK: + case IO_REPARSE_TAG_NFS: + case 0: + return true; + } + return false; +} + static void cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) { @@ -158,7 +180,7 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) * is a symbolic link, DFS referral or a reparse point with a direct * access like junctions, deduplicated files, NFS symlinks. */ - if (fattr->cf_cifsattrs & ATTR_REPARSE) + if (reparse_file_needs_reval(fattr)) fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; /* non-unix readdir doesn't provide nlink */ @@ -174,7 +196,8 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) * may look wrong since the inodes may not have timed out by the time * "ls" does a stat() call on them. */ - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) + if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || + (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && @@ -194,19 +217,37 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) } } +static void __dir_info_to_fattr(struct cifs_fattr *fattr, const void *info) +{ + const FILE_DIRECTORY_INFO *fi = info; + + memset(fattr, 0, sizeof(*fattr)); + fattr->cf_cifsattrs = le32_to_cpu(fi->ExtFileAttributes); + fattr->cf_eof = le64_to_cpu(fi->EndOfFile); + fattr->cf_bytes = le64_to_cpu(fi->AllocationSize); + fattr->cf_createtime = le64_to_cpu(fi->CreationTime); + fattr->cf_atime = cifs_NTtimeToUnix(fi->LastAccessTime); + fattr->cf_ctime = cifs_NTtimeToUnix(fi->ChangeTime); + fattr->cf_mtime = cifs_NTtimeToUnix(fi->LastWriteTime); +} + void cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, struct cifs_sb_info *cifs_sb) { - memset(fattr, 0, sizeof(*fattr)); - fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes); - fattr->cf_eof = le64_to_cpu(info->EndOfFile); - fattr->cf_bytes = le64_to_cpu(info->AllocationSize); - fattr->cf_createtime = le64_to_cpu(info->CreationTime); - fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); - fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); - fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); + __dir_info_to_fattr(fattr, info); + cifs_fill_common_info(fattr, cifs_sb); +} +static void cifs_fulldir_info_to_fattr(struct cifs_fattr *fattr, + SEARCH_ID_FULL_DIR_INFO *info, + struct cifs_sb_info *cifs_sb) +{ + __dir_info_to_fattr(fattr, info); + + /* See MS-FSCC 2.4.18 FileIdFullDirectoryInformation */ + if (fattr->cf_cifsattrs & ATTR_REPARSE) + fattr->cf_cifstag = le32_to_cpu(info->EaSize); cifs_fill_common_info(fattr, cifs_sb); } @@ -755,6 +796,11 @@ static int cifs_filldir(char *find_entry, struct file *file, (FIND_FILE_STANDARD_INFO *)find_entry, cifs_sb); break; + case SMB_FIND_FILE_ID_FULL_DIR_INFO: + cifs_fulldir_info_to_fattr(&fattr, + (SEARCH_ID_FULL_DIR_INFO *)find_entry, + cifs_sb); + break; default: cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *)find_entry, diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index dcd49ad60c83..43a88e26d26b 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -31,6 +31,257 @@ #include <linux/utsname.h> #include <linux/slab.h> #include "cifs_spnego.h" +#include "smb2proto.h" + +bool +is_server_using_iface(struct TCP_Server_Info *server, + struct cifs_server_iface *iface) +{ + struct sockaddr_in *i4 = (struct sockaddr_in *)&iface->sockaddr; + struct sockaddr_in6 *i6 = (struct sockaddr_in6 *)&iface->sockaddr; + struct sockaddr_in *s4 = (struct sockaddr_in *)&server->dstaddr; + struct sockaddr_in6 *s6 = (struct sockaddr_in6 *)&server->dstaddr; + + if (server->dstaddr.ss_family != iface->sockaddr.ss_family) + return false; + if (server->dstaddr.ss_family == AF_INET) { + if (s4->sin_addr.s_addr != i4->sin_addr.s_addr) + return false; + } else if (server->dstaddr.ss_family == AF_INET6) { + if (memcmp(&s6->sin6_addr, &i6->sin6_addr, + sizeof(i6->sin6_addr)) != 0) + return false; + } else { + /* unknown family.. */ + return false; + } + return true; +} + +bool is_ses_using_iface(struct cifs_ses *ses, struct cifs_server_iface *iface) +{ + int i; + + for (i = 0; i < ses->chan_count; i++) { + if (is_server_using_iface(ses->chans[i].server, iface)) + return true; + } + return false; +} + +/* returns number of channels added */ +int cifs_try_adding_channels(struct cifs_ses *ses) +{ + int old_chan_count = ses->chan_count; + int left = ses->chan_max - ses->chan_count; + int i = 0; + int rc = 0; + int tries = 0; + struct cifs_server_iface *ifaces = NULL; + size_t iface_count; + + if (left <= 0) { + cifs_dbg(FYI, + "ses already at max_channels (%zu), nothing to open\n", + ses->chan_max); + return 0; + } + + if (ses->server->dialect < SMB30_PROT_ID) { + cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n"); + return 0; + } + + /* + * Make a copy of the iface list at the time and use that + * instead so as to not hold the iface spinlock for opening + * channels + */ + spin_lock(&ses->iface_lock); + iface_count = ses->iface_count; + if (iface_count <= 0) { + spin_unlock(&ses->iface_lock); + cifs_dbg(VFS, "no iface list available to open channels\n"); + return 0; + } + ifaces = kmemdup(ses->iface_list, iface_count*sizeof(*ifaces), + GFP_ATOMIC); + if (!ifaces) { + spin_unlock(&ses->iface_lock); + return 0; + } + spin_unlock(&ses->iface_lock); + + /* + * Keep connecting to same, fastest, iface for all channels as + * long as its RSS. Try next fastest one if not RSS or channel + * creation fails. + */ + while (left > 0) { + struct cifs_server_iface *iface; + + tries++; + if (tries > 3*ses->chan_max) { + cifs_dbg(FYI, "too many attempt at opening channels (%d channels left to open)\n", + left); + break; + } + + iface = &ifaces[i]; + if (is_ses_using_iface(ses, iface) && !iface->rss_capable) { + i = (i+1) % iface_count; + continue; + } + + rc = cifs_ses_add_channel(ses, iface); + if (rc) { + cifs_dbg(FYI, "failed to open extra channel on iface#%d rc=%d\n", + i, rc); + i = (i+1) % iface_count; + continue; + } + + cifs_dbg(FYI, "successfully opened new channel on iface#%d\n", + i); + left--; + } + + kfree(ifaces); + return ses->chan_count - old_chan_count; +} + +int +cifs_ses_add_channel(struct cifs_ses *ses, struct cifs_server_iface *iface) +{ + struct cifs_chan *chan; + struct smb_vol vol = {NULL}; + static const char unc_fmt[] = "\\%s\\foo"; + char unc[sizeof(unc_fmt)+SERVER_NAME_LEN_WITH_NULL] = {0}; + struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; + struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; + int rc; + unsigned int xid = get_xid(); + + cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ", + ses, iface->speed, iface->rdma_capable ? "yes" : "no"); + if (iface->sockaddr.ss_family == AF_INET) + cifs_dbg(FYI, "ip:%pI4)\n", &ipv4->sin_addr); + else + cifs_dbg(FYI, "ip:%pI6)\n", &ipv6->sin6_addr); + + /* + * Setup a smb_vol with mostly the same info as the existing + * session and overwrite it with the requested iface data. + * + * We need to setup at least the fields used for negprot and + * sesssetup. + * + * We only need the volume here, so we can reuse memory from + * the session and server without caring about memory + * management. + */ + + /* Always make new connection for now (TODO?) */ + vol.nosharesock = true; + + /* Auth */ + vol.domainauto = ses->domainAuto; + vol.domainname = ses->domainName; + vol.username = ses->user_name; + vol.password = ses->password; + vol.sectype = ses->sectype; + vol.sign = ses->sign; + + /* UNC and paths */ + /* XXX: Use ses->server->hostname? */ + sprintf(unc, unc_fmt, ses->serverName); + vol.UNC = unc; + vol.prepath = ""; + + /* Re-use same version as master connection */ + vol.vals = ses->server->vals; + vol.ops = ses->server->ops; + + vol.noblocksnd = ses->server->noblocksnd; + vol.noautotune = ses->server->noautotune; + vol.sockopt_tcp_nodelay = ses->server->tcp_nodelay; + vol.echo_interval = ses->server->echo_interval / HZ; + + /* + * This will be used for encoding/decoding user/domain/pw + * during sess setup auth. + * + * XXX: We use the default for simplicity but the proper way + * would be to use the one that ses used, which is not + * stored. This might break when dealing with non-ascii + * strings. + */ + vol.local_nls = load_nls_default(); + + /* Use RDMA if possible */ + vol.rdma = iface->rdma_capable; + memcpy(&vol.dstaddr, &iface->sockaddr, sizeof(struct sockaddr_storage)); + + /* reuse master con client guid */ + memcpy(&vol.client_guid, ses->server->client_guid, + SMB2_CLIENT_GUID_SIZE); + vol.use_client_guid = true; + + mutex_lock(&ses->session_mutex); + + chan = &ses->chans[ses->chan_count]; + chan->server = cifs_get_tcp_session(&vol); + if (IS_ERR(chan->server)) { + rc = PTR_ERR(chan->server); + chan->server = NULL; + goto out; + } + spin_lock(&cifs_tcp_ses_lock); + chan->server->is_channel = true; + spin_unlock(&cifs_tcp_ses_lock); + + /* + * We need to allocate the server crypto now as we will need + * to sign packets before we generate the channel signing key + * (we sign with the session key) + */ + rc = smb311_crypto_shash_allocate(chan->server); + if (rc) { + cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); + goto out; + } + + ses->binding = true; + rc = cifs_negotiate_protocol(xid, ses); + if (rc) + goto out; + + rc = cifs_setup_session(xid, ses, vol.local_nls); + if (rc) + goto out; + + /* success, put it on the list + * XXX: sharing ses between 2 tcp server is not possible, the + * way "internal" linked lists works in linux makes element + * only able to belong to one list + * + * the binding session is already established so the rest of + * the code should be able to look it up, no need to add the + * ses to the new server. + */ + + ses->chan_count++; + atomic_set(&ses->chan_seq, 0); +out: + ses->binding = false; + mutex_unlock(&ses->session_mutex); + + if (rc && chan->server) + cifs_put_tcp_session(chan->server, 0); + unload_nls(vol.local_nls); + + return rc; +} static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB) { @@ -159,13 +410,16 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, const struct nls_table *nls_cp) { char *bcc_ptr = *pbcc_area; + int len; /* copy user */ /* BB what about null user mounts - check that we do this BB */ /* copy user */ if (ses->user_name != NULL) { - strncpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); - bcc_ptr += strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN); + len = strscpy(bcc_ptr, ses->user_name, CIFS_MAX_USERNAME_LEN); + if (WARN_ON_ONCE(len < 0)) + len = CIFS_MAX_USERNAME_LEN - 1; + bcc_ptr += len; } /* else null user mount */ *bcc_ptr = 0; @@ -173,8 +427,10 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifs_ses *ses, /* copy domain */ if (ses->domainName != NULL) { - strncpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); - bcc_ptr += strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN); + len = strscpy(bcc_ptr, ses->domainName, CIFS_MAX_DOMAINNAME_LEN); + if (WARN_ON_ONCE(len < 0)) + len = CIFS_MAX_DOMAINNAME_LEN - 1; + bcc_ptr += len; } /* else we will send a null domain name so the server will default to its own domain */ *bcc_ptr = 0; @@ -242,9 +498,10 @@ static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, kfree(ses->serverOS); - ses->serverOS = kzalloc(len + 1, GFP_KERNEL); + ses->serverOS = kmalloc(len + 1, GFP_KERNEL); if (ses->serverOS) { - strncpy(ses->serverOS, bcc_ptr, len); + memcpy(ses->serverOS, bcc_ptr, len); + ses->serverOS[len] = 0; if (strncmp(ses->serverOS, "OS/2", 4) == 0) cifs_dbg(FYI, "OS/2 server\n"); } @@ -258,9 +515,11 @@ static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft, kfree(ses->serverNOS); - ses->serverNOS = kzalloc(len + 1, GFP_KERNEL); - if (ses->serverNOS) - strncpy(ses->serverNOS, bcc_ptr, len); + ses->serverNOS = kmalloc(len + 1, GFP_KERNEL); + if (ses->serverNOS) { + memcpy(ses->serverNOS, bcc_ptr, len); + ses->serverNOS[len] = 0; + } bcc_ptr += len + 1; bleft -= len + 1; @@ -334,6 +593,7 @@ int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, struct cifs_ses *ses) { + struct TCP_Server_Info *server = cifs_ses_server(ses); NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; __u32 flags; @@ -346,9 +606,9 @@ void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC | NTLMSSP_NEGOTIATE_SEAL; - if (ses->server->sign) + if (server->sign) flags |= NTLMSSP_NEGOTIATE_SIGN; - if (!ses->server->session_estab || ses->ntlmssp->sesskey_per_smbsess) + if (!server->session_estab || ses->ntlmssp->sesskey_per_smbsess) flags |= NTLMSSP_NEGOTIATE_KEY_XCH; sec_blob->NegotiateFlags = cpu_to_le32(flags); @@ -690,7 +950,6 @@ sess_auth_lanman(struct sess_data *sess_data) char *bcc_ptr; struct cifs_ses *ses = sess_data->ses; char lnm_session_key[CIFS_AUTH_RESP_SIZE]; - __u32 capabilities; __u16 bytes_remaining; /* lanman 2 style sessionsetup */ @@ -701,7 +960,7 @@ sess_auth_lanman(struct sess_data *sess_data) pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base; bcc_ptr = sess_data->iov[2].iov_base; - capabilities = cifs_ssetup_hdr(ses, pSMB); + (void)cifs_ssetup_hdr(ses, pSMB); pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE; diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index b7421a096319..eb994e313c6a 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -171,6 +171,9 @@ cifs_get_next_mid(struct TCP_Server_Info *server) /* we do not want to loop forever */ last_mid = cur_mid; cur_mid++; + /* avoid 0xFFFF MID */ + if (cur_mid == 0xffff) + cur_mid++; /* * This nested loop looks more expensive than it is. @@ -366,12 +369,10 @@ coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) static void cifs_downgrade_oplock(struct TCP_Server_Info *server, - struct cifsInodeInfo *cinode, bool set_level2) + struct cifsInodeInfo *cinode, __u32 oplock, + unsigned int epoch, bool *purge_cache) { - if (set_level2) - cifs_set_oplock_level(cinode, OPLOCK_READ); - else - cifs_set_oplock_level(cinode, 0); + cifs_set_oplock_level(cinode, oplock); } static bool @@ -503,7 +504,8 @@ cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) } static void -cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) +cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_sb_info *cifs_sb) { CIFSSMBQFSDeviceInfo(xid, tcon); CIFSSMBQFSAttributeInfo(xid, tcon); @@ -564,7 +566,7 @@ cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = FILE_READ_ATTRIBUTES; - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.disposition = FILE_OPEN; oparms.path = full_path; oparms.fid = &fid; @@ -792,7 +794,7 @@ smb_set_file_info(struct inode *inode, const char *full_path, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES; - oparms.create_options = CREATE_NOT_DIR; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); oparms.disposition = FILE_OPEN; oparms.path = full_path; oparms.fid = &fid; @@ -871,7 +873,7 @@ cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, static int cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon, - struct kstatfs *buf) + struct cifs_sb_info *cifs_sb, struct kstatfs *buf) { int rc = -EOPNOTSUPP; @@ -969,7 +971,8 @@ cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = FILE_READ_ATTRIBUTES; - oparms.create_options = OPEN_REPARSE_POINT; + oparms.create_options = cifs_create_options(cifs_sb, + OPEN_REPARSE_POINT); oparms.disposition = FILE_OPEN; oparms.path = full_path; oparms.fid = &fid; @@ -1028,7 +1031,6 @@ cifs_make_node(unsigned int xid, struct inode *inode, struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct inode *newinode = NULL; int rc = -EPERM; - int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; FILE_ALL_INFO *buf = NULL; struct cifs_io_parms io_parms; __u32 oplock = 0; @@ -1089,13 +1091,11 @@ cifs_make_node(unsigned int xid, struct inode *inode, goto out; } - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_WRITE; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | + CREATE_OPTION_SPECIAL); oparms.disposition = FILE_CREATE; oparms.path = full_path; oparms.fid = &fid; diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index e6a1fc72018f..afe1f03aabe3 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -67,7 +67,7 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, goto out; - if (oparms->tcon->use_resilient) { + if (oparms->tcon->use_resilient) { /* default timeout is 0, servers pick default (120 seconds) */ nr_ioctl_req.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); @@ -145,7 +145,7 @@ smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, cur = buf; - down_write(&cinode->lock_sem); + cifs_down_write(&cinode->lock_sem); list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) { if (flock->fl_start > li->offset || (flock->fl_start + length) < diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index d8d9cdfa30b6..1cf207564ff9 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -51,7 +51,8 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, __u32 desired_access, __u32 create_disposition, - __u32 create_options, void *ptr, int command) + __u32 create_options, umode_t mode, void *ptr, int command, + struct cifsFileInfo *cfile) { int rc; __le16 *utf16_path = NULL; @@ -83,19 +84,25 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); + /* We already have a handle so we can skip the open */ + if (cfile) + goto after_open; + /* Open */ utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); - if (!utf16_path) - return -ENOMEM; + if (!utf16_path) { + rc = -ENOMEM; + goto finished; + } + memset(&oparms, 0, sizeof(struct cifs_open_parms)); oparms.tcon = tcon; oparms.desired_access = desired_access; oparms.disposition = create_disposition; - oparms.create_options = create_options; - if (backup_cred(cifs_sb)) - oparms.create_options |= CREATE_OPEN_BACKUP_INTENT; + oparms.create_options = cifs_create_options(cifs_sb, create_options); oparms.fid = &fid; oparms.reconnect = false; + oparms.mode = mode; memset(&open_iov, 0, sizeof(open_iov)); rqst[num_rqst].rq_iov = open_iov; @@ -106,7 +113,10 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto finished; - smb2_set_next_command(tcon, &rqst[num_rqst++]); + smb2_set_next_command(tcon, &rqst[num_rqst]); + after_open: + num_rqst++; + rc = 0; /* Operation */ switch (command) { @@ -115,15 +125,31 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, rqst[num_rqst].rq_iov = qi_iov; rqst[num_rqst].rq_nvec = 1; - rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID, FILE_ALL_INFORMATION, + if (cfile) + rc = SMB2_query_info_init(tcon, &rqst[num_rqst], + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 0, NULL); + else { + rc = SMB2_query_info_init(tcon, &rqst[num_rqst], + COMPOUND_FID, + COMPOUND_FID, + FILE_ALL_INFORMATION, + SMB2_O_INFO_FILE, 0, + sizeof(struct smb2_file_all_info) + + PATH_MAX * 2, 0, NULL); + if (!rc) { + smb2_set_next_command(tcon, &rqst[num_rqst]); + smb2_set_related(&rqst[num_rqst]); + } + } + if (rc) goto finished; - smb2_set_next_command(tcon, &rqst[num_rqst]); - smb2_set_related(&rqst[num_rqst++]); + num_rqst++; trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path); break; @@ -182,14 +208,27 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, size[0] = sizeof(FILE_BASIC_INFO); data[0] = ptr; - rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID, current->tgid, - FILE_BASIC_INFORMATION, - SMB2_O_INFO_FILE, 0, data, size); + if (cfile) + rc = SMB2_set_info_init(tcon, &rqst[num_rqst], + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, current->tgid, + FILE_BASIC_INFORMATION, + SMB2_O_INFO_FILE, 0, data, size); + else { + rc = SMB2_set_info_init(tcon, &rqst[num_rqst], + COMPOUND_FID, + COMPOUND_FID, current->tgid, + FILE_BASIC_INFORMATION, + SMB2_O_INFO_FILE, 0, data, size); + if (!rc) { + smb2_set_next_command(tcon, &rqst[num_rqst]); + smb2_set_related(&rqst[num_rqst]); + } + } + if (rc) goto finished; - smb2_set_next_command(tcon, &rqst[num_rqst]); - smb2_set_related(&rqst[num_rqst++]); + num_rqst++; trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid, full_path); break; @@ -210,14 +249,25 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, size[1] = len + 2 /* null */; data[1] = (__le16 *)ptr; - rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID, current->tgid, - FILE_RENAME_INFORMATION, + if (cfile) + rc = SMB2_set_info_init(tcon, &rqst[num_rqst], + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); + else { + rc = SMB2_set_info_init(tcon, &rqst[num_rqst], + COMPOUND_FID, COMPOUND_FID, + current->tgid, FILE_RENAME_INFORMATION, + SMB2_O_INFO_FILE, 0, data, size); + if (!rc) { + smb2_set_next_command(tcon, &rqst[num_rqst]); + smb2_set_related(&rqst[num_rqst]); + } + } if (rc) goto finished; - smb2_set_next_command(tcon, &rqst[num_rqst]); - smb2_set_related(&rqst[num_rqst++]); + num_rqst++; trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path); break; case SMB2_OP_HARDLINK: @@ -254,21 +304,43 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, if (rc) goto finished; + /* We already have a handle so we can skip the close */ + if (cfile) + goto after_close; /* Close */ memset(&close_iov, 0, sizeof(close_iov)); rqst[num_rqst].rq_iov = close_iov; rqst[num_rqst].rq_nvec = 1; rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID, - COMPOUND_FID); - smb2_set_related(&rqst[num_rqst++]); + COMPOUND_FID, false); + smb2_set_related(&rqst[num_rqst]); if (rc) goto finished; - - rc = compound_send_recv(xid, ses, flags, num_rqst, rqst, - resp_buftype, rsp_iov); + after_close: + num_rqst++; + + if (cfile) { + cifsFileInfo_put(cfile); + cfile = NULL; + rc = compound_send_recv(xid, ses, flags, num_rqst - 2, + &rqst[1], &resp_buftype[1], + &rsp_iov[1]); + } else + rc = compound_send_recv(xid, ses, flags, num_rqst, + rqst, resp_buftype, + rsp_iov); finished: + if (cfile) + cifsFileInfo_put(cfile); + SMB2_open_free(&rqst[0]); + if (rc == -EREMCHG) { + printk_once(KERN_WARNING "server share %s deleted\n", + tcon->treeName); + tcon->need_reconnect = true; + } + switch (command) { case SMB2_OP_QUERY_INFO: if (rc == 0) { @@ -371,6 +443,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, __u32 create_options = 0; struct cifs_fid fid; bool no_cached_open = tcon->nohandlecache; + struct cifsFileInfo *cfile; *adjust_tz = false; *symlink = false; @@ -382,7 +455,7 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, /* If it is a root and its handle is cached then use it */ if (!strlen(full_path) && !no_cached_open) { - rc = open_shroot(xid, tcon, &fid); + rc = open_shroot(xid, tcon, cifs_sb, &fid); if (rc) goto out; @@ -399,12 +472,10 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, goto out; } - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - + cifs_get_readable_path(tcon, full_path, &cfile); rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, create_options, - smb2_data, SMB2_OP_QUERY_INFO); + ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile); if (rc == -EOPNOTSUPP) { *symlink = true; create_options |= OPEN_REPARSE_POINT; @@ -412,8 +483,8 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, /* Failed on a symbolic link - query a reparse point info */ rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, - create_options, smb2_data, - SMB2_OP_QUERY_INFO); + create_options, ACL_NO_MODE, + smb2_data, SMB2_OP_QUERY_INFO, NULL); } if (rc) goto out; @@ -425,12 +496,14 @@ out: } int -smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, +smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, + struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb) { return smb2_compound_op(xid, tcon, cifs_sb, name, FILE_WRITE_ATTRIBUTES, FILE_CREATE, - CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR); + CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR, + NULL); } void @@ -440,6 +513,7 @@ smb2_mkdir_setinfo(struct inode *inode, const char *name, { FILE_BASIC_INFO data; struct cifsInodeInfo *cifs_i; + struct cifsFileInfo *cfile; u32 dosattrs; int tmprc; @@ -447,9 +521,11 @@ smb2_mkdir_setinfo(struct inode *inode, const char *name, cifs_i = CIFS_I(inode); dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; data.Attributes = cpu_to_le32(dosattrs); + cifs_get_writable_path(tcon, name, &cfile); tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, FILE_WRITE_ATTRIBUTES, FILE_CREATE, - CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO); + CREATE_NOT_FILE, ACL_NO_MODE, + &data, SMB2_OP_SET_INFO, cfile); if (tmprc == 0) cifs_i->cifsAttrs = dosattrs; } @@ -459,8 +535,8 @@ smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb) { return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, - CREATE_NOT_FILE, - NULL, SMB2_OP_RMDIR); + CREATE_NOT_FILE, ACL_NO_MODE, + NULL, SMB2_OP_RMDIR, NULL); } int @@ -469,13 +545,14 @@ smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, { return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, - NULL, SMB2_OP_DELETE); + ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL); } static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, const char *from_name, const char *to_name, - struct cifs_sb_info *cifs_sb, __u32 access, int command) + struct cifs_sb_info *cifs_sb, __u32 access, int command, + struct cifsFileInfo *cfile) { __le16 *smb2_to_name = NULL; int rc; @@ -486,7 +563,8 @@ smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, goto smb2_rename_path; } rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access, - FILE_OPEN, 0, smb2_to_name, command); + FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name, + command, cfile); smb2_rename_path: kfree(smb2_to_name); return rc; @@ -497,8 +575,12 @@ smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, const char *from_name, const char *to_name, struct cifs_sb_info *cifs_sb) { - return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, - DELETE, SMB2_OP_RENAME); + struct cifsFileInfo *cfile; + + cifs_get_writable_path(tcon, from_name, &cfile); + + return smb2_set_path_attr(xid, tcon, from_name, to_name, + cifs_sb, DELETE, SMB2_OP_RENAME, cfile); } int @@ -507,7 +589,8 @@ smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb) { return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, - FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK); + FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK, + NULL); } int @@ -518,8 +601,8 @@ smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, __le64 eof = cpu_to_le64(size); return smb2_compound_op(xid, tcon, cifs_sb, full_path, - FILE_WRITE_DATA, FILE_OPEN, 0, &eof, - SMB2_OP_SET_EOF); + FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE, + &eof, SMB2_OP_SET_EOF, NULL); } int @@ -540,8 +623,8 @@ smb2_set_file_info(struct inode *inode, const char *full_path, return PTR_ERR(tlink); rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path, - FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf, - SMB2_OP_SET_INFO); + FILE_WRITE_ATTRIBUTES, FILE_OPEN, + 0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL); cifs_put_tlink(tlink); return rc; } diff --git a/fs/cifs/smb2maperror.c b/fs/cifs/smb2maperror.c index 82ade16c9501..7fde3775cb57 100644 --- a/fs/cifs/smb2maperror.c +++ b/fs/cifs/smb2maperror.c @@ -511,7 +511,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = { {STATUS_PRINT_QUEUE_FULL, -EIO, "STATUS_PRINT_QUEUE_FULL"}, {STATUS_NO_SPOOL_SPACE, -EIO, "STATUS_NO_SPOOL_SPACE"}, {STATUS_PRINT_CANCELLED, -EIO, "STATUS_PRINT_CANCELLED"}, - {STATUS_NETWORK_NAME_DELETED, -EIO, "STATUS_NETWORK_NAME_DELETED"}, + {STATUS_NETWORK_NAME_DELETED, -EREMCHG, "STATUS_NETWORK_NAME_DELETED"}, {STATUS_NETWORK_ACCESS_DENIED, -EACCES, "STATUS_NETWORK_ACCESS_DENIED"}, {STATUS_BAD_DEVICE_TYPE, -EIO, "STATUS_BAD_DEVICE_TYPE"}, {STATUS_BAD_NETWORK_NAME, -ENOENT, "STATUS_BAD_NETWORK_NAME"}, diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index e311f58dc1c8..0511aaf451d4 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -29,6 +29,7 @@ #include "cifs_unicode.h" #include "smb2status.h" #include "smb2glob.h" +#include "nterr.h" static int check_smb2_hdr(struct smb2_sync_hdr *shdr, __u64 mid) @@ -249,16 +250,10 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr) * of junk. Other servers match RFC1001 len to actual * SMB2/SMB3 frame length (header + smb2 response specific data) * Some windows servers also pad up to 8 bytes when compounding. - * If pad is longer than eight bytes, log the server behavior - * (once), since may indicate a problem but allow it and continue - * since the frame is parseable. */ - if (clc_len < len) { - pr_warn_once( - "srv rsp padded more than expected. Length %d not %d for cmd:%d mid:%llu\n", - len, clc_len, command, mid); + if (clc_len < len) return 0; - } + pr_warn_once( "srv rsp too short, len %d not %d. cmd:%d mid:%llu\n", len, clc_len, command, mid); @@ -534,7 +529,7 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp, cifs_dbg(FYI, "found in the open list\n"); cifs_dbg(FYI, "lease key match, lease break 0x%x\n", - le32_to_cpu(rsp->NewLeaseState)); + lease_state); if (ack_req) cfile->oplock_break_cancelled = false; @@ -543,17 +538,8 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp, set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags); - /* - * Set or clear flags depending on the lease state being READ. - * HANDLE caching flag should be added when the client starts - * to defer closing remote file handles with HANDLE leases. - */ - if (lease_state & SMB2_LEASE_READ_CACHING_HE) - set_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, - &cinode->flags); - else - clear_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, - &cinode->flags); + cfile->oplock_epoch = le16_to_cpu(rsp->Epoch); + cfile->oplock_level = lease_state; cifs_queue_oplock_break(cfile); kfree(lw); @@ -576,7 +562,7 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp, cifs_dbg(FYI, "found in the pending open list\n"); cifs_dbg(FYI, "lease key match, lease break 0x%x\n", - le32_to_cpu(rsp->NewLeaseState)); + lease_state); open->oplock = lease_state; } @@ -673,10 +659,10 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) spin_lock(&cifs_tcp_ses_lock); list_for_each(tmp, &server->smb_ses_list) { ses = list_entry(tmp, struct cifs_ses, smb_ses_list); + list_for_each(tmp1, &ses->tcon_list) { tcon = list_entry(tmp1, struct cifs_tcon, tcon_list); - cifs_stats_inc(&tcon->stats.cifs_stats.num_oplock_brks); spin_lock(&tcon->open_file_lock); list_for_each(tmp2, &tcon->openFileList) { cfile = list_entry(tmp2, struct cifsFileInfo, @@ -688,6 +674,8 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) continue; cifs_dbg(FYI, "file id match, oplock break\n"); + cifs_stats_inc( + &tcon->stats.cifs_stats.num_oplock_brks); cinode = CIFS_I(d_inode(cfile->dentry)); spin_lock(&cfile->file_info_lock); if (!CIFS_CACHE_WRITE(cinode) && @@ -699,18 +687,9 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags); - /* - * Set flag if the server downgrades the oplock - * to L2 else clear. - */ - if (rsp->OplockLevel) - set_bit( - CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, - &cinode->flags); - else - clear_bit( - CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2, - &cinode->flags); + cfile->oplock_epoch = 0; + cfile->oplock_level = rsp->OplockLevel; + spin_unlock(&cfile->file_info_lock); cifs_queue_oplock_break(cfile); @@ -720,9 +699,6 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) return true; } spin_unlock(&tcon->open_file_lock); - spin_unlock(&cifs_tcp_ses_lock); - cifs_dbg(FYI, "No matching file for oplock break\n"); - return true; } } spin_unlock(&cifs_tcp_ses_lock); @@ -735,45 +711,98 @@ smb2_cancelled_close_fid(struct work_struct *work) { struct close_cancelled_open *cancelled = container_of(work, struct close_cancelled_open, work); + struct cifs_tcon *tcon = cancelled->tcon; + int rc; - cifs_dbg(VFS, "Close unmatched open\n"); + if (cancelled->mid) + cifs_tcon_dbg(VFS, "Close unmatched open for MID:%llx\n", + cancelled->mid); + else + cifs_tcon_dbg(VFS, "Close interrupted close\n"); - SMB2_close(0, cancelled->tcon, cancelled->fid.persistent_fid, - cancelled->fid.volatile_fid); - cifs_put_tcon(cancelled->tcon); + rc = SMB2_close(0, tcon, cancelled->fid.persistent_fid, + cancelled->fid.volatile_fid); + if (rc) + cifs_tcon_dbg(VFS, "Close cancelled mid failed rc:%d\n", rc); + + cifs_put_tcon(tcon); kfree(cancelled); } +/* + * Caller should already has an extra reference to @tcon + * This function is used to queue work to close a handle to prevent leaks + * on the server. + * We handle two cases. If an open was interrupted after we sent the + * SMB2_CREATE to the server but before we processed the reply, and second + * if a close was interrupted before we sent the SMB2_CLOSE to the server. + */ +static int +__smb2_handle_cancelled_cmd(struct cifs_tcon *tcon, __u16 cmd, __u64 mid, + __u64 persistent_fid, __u64 volatile_fid) +{ + struct close_cancelled_open *cancelled; + + cancelled = kzalloc(sizeof(*cancelled), GFP_ATOMIC); + if (!cancelled) + return -ENOMEM; + + cancelled->fid.persistent_fid = persistent_fid; + cancelled->fid.volatile_fid = volatile_fid; + cancelled->tcon = tcon; + cancelled->cmd = cmd; + cancelled->mid = mid; + INIT_WORK(&cancelled->work, smb2_cancelled_close_fid); + WARN_ON(queue_work(cifsiod_wq, &cancelled->work) == false); + + return 0; +} + +int +smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid, + __u64 volatile_fid) +{ + int rc; + + cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); + spin_lock(&cifs_tcp_ses_lock); + tcon->tc_count++; + spin_unlock(&cifs_tcp_ses_lock); + + rc = __smb2_handle_cancelled_cmd(tcon, SMB2_CLOSE_HE, 0, + persistent_fid, volatile_fid); + if (rc) + cifs_put_tcon(tcon); + + return rc; +} + int smb2_handle_cancelled_mid(char *buffer, struct TCP_Server_Info *server) { struct smb2_sync_hdr *sync_hdr = (struct smb2_sync_hdr *)buffer; struct smb2_create_rsp *rsp = (struct smb2_create_rsp *)buffer; struct cifs_tcon *tcon; - struct close_cancelled_open *cancelled; + int rc; if (sync_hdr->Command != SMB2_CREATE || sync_hdr->Status != STATUS_SUCCESS) return 0; - cancelled = kzalloc(sizeof(*cancelled), GFP_KERNEL); - if (!cancelled) - return -ENOMEM; - tcon = smb2_find_smb_tcon(server, sync_hdr->SessionId, sync_hdr->TreeId); - if (!tcon) { - kfree(cancelled); + if (!tcon) return -ENOENT; - } - cancelled->fid.persistent_fid = rsp->PersistentFileId; - cancelled->fid.volatile_fid = rsp->VolatileFileId; - cancelled->tcon = tcon; - INIT_WORK(&cancelled->work, smb2_cancelled_close_fid); - queue_work(cifsiod_wq, &cancelled->work); + rc = __smb2_handle_cancelled_cmd(tcon, + le16_to_cpu(sync_hdr->Command), + le64_to_cpu(sync_hdr->MessageId), + rsp->PersistentFileId, + rsp->VolatileFileId); + if (rc) + cifs_put_tcon(tcon); - return 0; + return rc; } /** @@ -788,23 +817,37 @@ smb311_update_preauth_hash(struct cifs_ses *ses, struct kvec *iov, int nvec) int i, rc; struct sdesc *d; struct smb2_sync_hdr *hdr; + struct TCP_Server_Info *server = cifs_ses_server(ses); - if (ses->server->tcpStatus == CifsGood) { - /* skip non smb311 connections */ - if (ses->server->dialect != SMB311_PROT_ID) - return 0; + hdr = (struct smb2_sync_hdr *)iov[0].iov_base; + /* neg prot are always taken */ + if (hdr->Command == SMB2_NEGOTIATE) + goto ok; - /* skip last sess setup response */ - hdr = (struct smb2_sync_hdr *)iov[0].iov_base; - if (hdr->Flags & SMB2_FLAGS_SIGNED) - return 0; - } + /* + * If we process a command which wasn't a negprot it means the + * neg prot was already done, so the server dialect was set + * and we can test it. Preauth requires 3.1.1 for now. + */ + if (server->dialect != SMB311_PROT_ID) + return 0; + + if (hdr->Command != SMB2_SESSION_SETUP) + return 0; + + /* skip last sess setup response */ + if ((hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) + && (hdr->Status == NT_STATUS_OK + || (hdr->Status != + cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED)))) + return 0; - rc = smb311_crypto_shash_allocate(ses->server); +ok: + rc = smb311_crypto_shash_allocate(server); if (rc) return rc; - d = ses->server->secmech.sdescsha512; + d = server->secmech.sdescsha512; rc = crypto_shash_init(&d->shash); if (rc) { cifs_dbg(VFS, "%s: could not init sha512 shash\n", __func__); diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 64a5864127be..e47190cae163 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -10,7 +10,9 @@ #include <linux/falloc.h> #include <linux/scatterlist.h> #include <linux/uuid.h> +#include <linux/sort.h> #include <crypto/aead.h> +#include "cifsfs.h" #include "cifsglob.h" #include "smb2pdu.h" #include "smb2proto.h" @@ -109,10 +111,10 @@ smb2_add_credits(struct TCP_Server_Info *server, /* change_conf hasn't been executed */ break; case 0: - cifs_dbg(VFS, "Possible client or server bug - zero credits\n"); + cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); break; case 1: - cifs_dbg(VFS, "disabling echoes and oplocks\n"); + cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); break; case 2: cifs_dbg(FYI, "disabling oplocks\n"); @@ -151,13 +153,7 @@ smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) static unsigned int smb2_get_credits(struct mid_q_entry *mid) { - struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf; - - if (mid->mid_state == MID_RESPONSE_RECEIVED - || mid->mid_state == MID_RESPONSE_MALFORMED) - return le16_to_cpu(shdr->CreditRequest); - - return 0; + return mid->credits_received; } static int @@ -203,6 +199,8 @@ smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size, credits->instance = server->reconnect_instance; server->credits -= credits->value; server->in_flight++; + if (server->in_flight > server->max_in_flight) + server->max_in_flight = server->in_flight; break; } } @@ -230,7 +228,7 @@ smb2_adjust_credits(struct TCP_Server_Info *server, if (server->reconnect_instance != credits->instance) { spin_unlock(&server->req_lock); - cifs_dbg(VFS, "trying to return %d credits to old session\n", + cifs_server_dbg(VFS, "trying to return %d credits to old session\n", credits->value - new_val); return -EAGAIN; } @@ -270,7 +268,7 @@ smb2_find_mid(struct TCP_Server_Info *server, char *buf) __u64 wire_mid = le64_to_cpu(shdr->MessageId); if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { - cifs_dbg(VFS, "Encrypted frame parsing not supported yet\n"); + cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); return NULL; } @@ -294,10 +292,10 @@ smb2_dump_detail(void *buf, struct TCP_Server_Info *server) #ifdef CONFIG_CIFS_DEBUG2 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf; - cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", + cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, shdr->ProcessId); - cifs_dbg(VFS, "smb buf %p len %u\n", buf, + cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, server->ops->calc_smb_size(buf, server)); #endif } @@ -313,7 +311,7 @@ smb2_negotiate(const unsigned int xid, struct cifs_ses *ses) { int rc; - ses->server->CurrentMid = 0; + cifs_ses_server(ses)->CurrentMid = 0; rc = SMB2_negotiate(xid, ses); /* BB we probably don't need to retry with modern servers */ if (rc == -EAGAIN) @@ -556,6 +554,13 @@ out: return rc; } +static int compare_iface(const void *ia, const void *ib) +{ + const struct cifs_server_iface *a = (struct cifs_server_iface *)ia; + const struct cifs_server_iface *b = (struct cifs_server_iface *)ib; + + return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1); +} static int SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon) @@ -576,7 +581,7 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon) "server does not support query network interfaces\n"); goto out; } else if (rc != 0) { - cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc); + cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); goto out; } @@ -585,6 +590,9 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon) if (rc) goto out; + /* sort interfaces from fastest to slowest */ + sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL); + spin_lock(&ses->iface_lock); kfree(ses->iface_list); ses->iface_list = iface_list; @@ -609,6 +617,7 @@ smb2_close_cached_fid(struct kref *ref) cfid->fid->volatile_fid); cfid->is_valid = false; cfid->file_all_info_is_valid = false; + cfid->has_lease = false; } } @@ -619,19 +628,35 @@ void close_shroot(struct cached_fid *cfid) mutex_unlock(&cfid->fid_mutex); } +void close_shroot_lease_locked(struct cached_fid *cfid) +{ + if (cfid->has_lease) { + cfid->has_lease = false; + kref_put(&cfid->refcount, smb2_close_cached_fid); + } +} + +void close_shroot_lease(struct cached_fid *cfid) +{ + mutex_lock(&cfid->fid_mutex); + close_shroot_lease_locked(cfid); + mutex_unlock(&cfid->fid_mutex); +} + void smb2_cached_lease_break(struct work_struct *work) { struct cached_fid *cfid = container_of(work, struct cached_fid, lease_break); - close_shroot(cfid); + close_shroot_lease(cfid); } /* * Open the directory at the root of a share */ -int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) +int open_shroot(unsigned int xid, struct cifs_tcon *tcon, + struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid) { struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server = ses->server; @@ -656,6 +681,15 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) return 0; } + /* + * We do not hold the lock for the open because in case + * SMB2_open needs to reconnect, it will end up calling + * cifs_mark_open_files_invalid() which takes the lock again + * thus causing a deadlock + */ + + mutex_unlock(&tcon->crfid.fid_mutex); + if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -669,7 +703,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms.tcon = tcon; - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; oparms.fid = pfid; @@ -677,7 +711,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path); if (rc) - goto oshr_exit; + goto oshr_free; smb2_set_next_command(tcon, &rqst[0]); memset(&qi_iov, 0, sizeof(qi_iov)); @@ -690,18 +724,10 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) sizeof(struct smb2_file_all_info) + PATH_MAX * 2, 0, NULL); if (rc) - goto oshr_exit; + goto oshr_free; smb2_set_related(&rqst[1]); - /* - * We do not hold the lock for the open because in case - * SMB2_open needs to reconnect, it will end up calling - * cifs_mark_open_files_invalid() which takes the lock again - * thus causing a deadlock - */ - - mutex_unlock(&tcon->crfid.fid_mutex); rc = compound_send_recv(xid, ses, flags, 2, rqst, resp_buftype, rsp_iov); mutex_lock(&tcon->crfid.fid_mutex); @@ -739,8 +765,16 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) /* Cached root is still invalid, continue normaly */ - if (rc) + if (rc) { + if (rc == -EREMCHG) { + tcon->need_reconnect = true; + printk_once(KERN_WARNING "server share %s deleted\n", + tcon->treeName); + } goto oshr_exit; + } + + atomic_inc(&tcon->num_remote_opens); o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; oparms.fid->persistent_fid = o_rsp->PersistentFileId; @@ -757,6 +791,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) /* BB TBD check to see if oplock level check can be removed below */ if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) { kref_get(&tcon->crfid.refcount); + tcon->crfid.has_lease = true; smb2_parse_contexts(server, o_rsp, &oparms.fid->epoch, oparms.fid->lease_key, &oplock, NULL); @@ -771,7 +806,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) sizeof(struct smb2_file_all_info), &rsp_iov[1], sizeof(struct smb2_file_all_info), (char *)&tcon->crfid.file_all_info)) - tcon->crfid.file_all_info_is_valid = 1; + tcon->crfid.file_all_info_is_valid = true; oshr_exit: mutex_unlock(&tcon->crfid.fid_mutex); @@ -784,7 +819,8 @@ oshr_free: } static void -smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) +smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_sb_info *cifs_sb) { int rc; __le16 srch_path = 0; /* Null - open root of share */ @@ -796,7 +832,7 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -804,7 +840,7 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL); else - rc = open_shroot(xid, tcon, &fid); + rc = open_shroot(xid, tcon, cifs_sb, &fid); if (rc) return; @@ -826,7 +862,8 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) } static void -smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) +smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_sb_info *cifs_sb) { int rc; __le16 srch_path = 0; /* Null - open root of share */ @@ -837,7 +874,7 @@ smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -872,10 +909,7 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; - if (backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -1082,7 +1116,8 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, void *data[1]; struct smb2_file_full_ea_info *ea = NULL; struct kvec close_iov[1]; - int rc; + struct smb2_query_info_rsp *rsp; + int rc, used_len = 0; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -1105,6 +1140,38 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, cifs_sb); if (rc == -ENODATA) goto sea_exit; + } else { + /* If we are adding a attribute we should first check + * if there will be enough space available to store + * the new EA. If not we should not add it since we + * would not be able to even read the EAs back. + */ + rc = smb2_query_info_compound(xid, tcon, utf16_path, + FILE_READ_EA, + FILE_FULL_EA_INFORMATION, + SMB2_O_INFO_FILE, + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE, + &rsp_iov[1], &resp_buftype[1], cifs_sb); + if (rc == 0) { + rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; + used_len = le32_to_cpu(rsp->OutputBufferLength); + } + free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); + resp_buftype[1] = CIFS_NO_BUFFER; + memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); + rc = 0; + + /* Use a fudge factor of 256 bytes in case we collide + * with a different set_EAs command. + */ + if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < + used_len + ea_name_len + ea_value_len + 1) { + rc = -ENOSPC; + goto sea_exit; + } } } @@ -1117,10 +1184,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.desired_access = FILE_WRITE_EA; oparms.disposition = FILE_OPEN; - if (backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -1162,11 +1226,12 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, memset(&close_iov, 0, sizeof(close_iov)); rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); smb2_set_related(&rqst[2]); rc = compound_send_recv(xid, ses, flags, 3, rqst, resp_buftype, rsp_iov); + /* no need to bump num_remote_opens because handle immediately closed */ sea_exit: kfree(ea); @@ -1315,6 +1380,45 @@ smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } +static void +smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, + struct cifsFileInfo *cfile) +{ + struct smb2_file_network_open_info file_inf; + struct inode *inode; + int rc; + + rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, + cfile->fid.volatile_fid, &file_inf); + if (rc) + return; + + inode = d_inode(cfile->dentry); + + spin_lock(&inode->i_lock); + CIFS_I(inode)->time = jiffies; + + /* Creation time should not need to be updated on close */ + if (file_inf.LastWriteTime) + inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime); + if (file_inf.ChangeTime) + inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime); + if (file_inf.LastAccessTime) + inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime); + + /* + * i_blocks is not related to (i_size / i_blksize), + * but instead 512 byte (2**9) size is required for + * calculating num blocks. + */ + if (le64_to_cpu(file_inf.AllocationSize) > 4096) + inode->i_blocks = + (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; + + /* End of file and Attributes should not have to be updated on close */ + spin_unlock(&inode->i_lock); +} + static int SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, @@ -1330,11 +1434,11 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, (char **)&res_key, &ret_data_len); if (rc) { - cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); + cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); goto req_res_key_exit; } if (ret_data_len < sizeof(struct resume_key_req)) { - cifs_dbg(VFS, "Invalid refcopy resume key length\n"); + cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); rc = -EINVAL; goto req_res_key_exit; } @@ -1348,6 +1452,7 @@ req_res_key_exit: static int smb2_ioctl_query_info(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_sb_info *cifs_sb, __le16 *path, int is_dir, unsigned long p) { @@ -1369,7 +1474,11 @@ smb2_ioctl_query_info(const unsigned int xid, struct cifs_fid fid; struct kvec qi_iov[1]; struct kvec io_iov[SMB2_IOCTL_IOV_SIZE]; + struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; struct kvec close_iov[1]; + unsigned int size[2]; + void *data[2]; + int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; @@ -1387,15 +1496,10 @@ smb2_ioctl_query_info(const unsigned int xid, if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; - buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL); - if (buffer == NULL) - return -ENOMEM; - - if (copy_from_user(buffer, arg + sizeof(struct smb_query_info), - qi.output_buffer_length)) { - rc = -EFAULT; - goto iqinf_exit; - } + buffer = memdup_user(arg + sizeof(struct smb_query_info), + qi.output_buffer_length); + if (IS_ERR(buffer)) + return PTR_ERR(buffer); /* Open */ memset(&open_iov, 0, sizeof(open_iov)); @@ -1404,18 +1508,11 @@ smb2_ioctl_query_info(const unsigned int xid, memset(&oparms, 0, sizeof(oparms)); oparms.tcon = tcon; - oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; oparms.disposition = FILE_OPEN; - if (is_dir) - oparms.create_options = CREATE_NOT_FILE; - else - oparms.create_options = CREATE_NOT_DIR; + oparms.create_options = cifs_create_options(cifs_sb, create_options); oparms.fid = &fid; oparms.reconnect = false; - /* - * FSCTL codes encode the special access they need in the fsctl code. - */ if (qi.flags & PASSTHRU_FSCTL) { switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: @@ -1431,6 +1528,10 @@ smb2_ioctl_query_info(const unsigned int xid, oparms.desired_access = GENERIC_WRITE; break; } + } else if (qi.flags & PASSTHRU_SET_INFO) { + oparms.desired_access = GENERIC_WRITE; + } else { + oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; } rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path); @@ -1452,7 +1553,27 @@ smb2_ioctl_query_info(const unsigned int xid, COMPOUND_FID, COMPOUND_FID, qi.info_type, true, buffer, qi.output_buffer_length, - CIFSMaxBufSize); + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE); + } + } else if (qi.flags == PASSTHRU_SET_INFO) { + /* Can eventually relax perm check since server enforces too */ + if (!capable(CAP_SYS_ADMIN)) + rc = -EPERM; + else { + memset(&si_iov, 0, sizeof(si_iov)); + rqst[1].rq_iov = si_iov; + rqst[1].rq_nvec = 1; + + size[0] = 8; + data[0] = buffer; + + rc = SMB2_set_info_init(tcon, &rqst[1], + COMPOUND_FID, COMPOUND_FID, + current->tgid, + FILE_END_OF_FILE_INFORMATION, + SMB2_O_INFO_FILE, 0, data, size); } } else if (qi.flags == PASSTHRU_QUERY_INFO) { memset(&qi_iov, 0, sizeof(qi_iov)); @@ -1465,7 +1586,7 @@ smb2_ioctl_query_info(const unsigned int xid, qi.input_buffer_length, qi.output_buffer_length, buffer); } else { /* unknown flags */ - cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags); + cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags); rc = -EINVAL; } @@ -1479,7 +1600,7 @@ smb2_ioctl_query_info(const unsigned int xid, rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto iqinf_exit; smb2_set_related(&rqst[2]); @@ -1488,41 +1609,40 @@ smb2_ioctl_query_info(const unsigned int xid, resp_buftype, rsp_iov); if (rc) goto iqinf_exit; + + /* No need to bump num_remote_opens since handle immediately closed */ if (qi.flags & PASSTHRU_FSCTL) { pqi = (struct smb_query_info __user *)arg; io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); if (qi.input_buffer_length > 0 && - le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) { - rc = -EFAULT; - goto iqinf_exit; - } - if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, - sizeof(qi.input_buffer_length))) { - rc = -EFAULT; - goto iqinf_exit; - } + le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length + > rsp_iov[1].iov_len) + goto e_fault; + + if (copy_to_user(&pqi->input_buffer_length, + &qi.input_buffer_length, + sizeof(qi.input_buffer_length))) + goto e_fault; + if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), - qi.input_buffer_length)) { - rc = -EFAULT; - goto iqinf_exit; - } + qi.input_buffer_length)) + goto e_fault; } else { pqi = (struct smb_query_info __user *)arg; qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); - if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, - sizeof(qi.input_buffer_length))) { - rc = -EFAULT; - goto iqinf_exit; - } - if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) { - rc = -EFAULT; - goto iqinf_exit; - } + if (copy_to_user(&pqi->input_buffer_length, + &qi.input_buffer_length, + sizeof(qi.input_buffer_length))) + goto e_fault; + + if (copy_to_user(pqi + 1, qi_rsp->Buffer, + qi.input_buffer_length)) + goto e_fault; } iqinf_exit: @@ -1538,6 +1658,10 @@ smb2_ioctl_query_info(const unsigned int xid, free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); return rc; + +e_fault: + rc = -EFAULT; + goto iqinf_exit; } static ssize_t @@ -1592,7 +1716,7 @@ smb2_copychunk_range(const unsigned int xid, if (rc == 0) { if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) { - cifs_dbg(VFS, "invalid cchunk response size\n"); + cifs_tcon_dbg(VFS, "invalid cchunk response size\n"); rc = -EIO; goto cchunk_out; } @@ -1606,12 +1730,12 @@ smb2_copychunk_range(const unsigned int xid, */ if (le32_to_cpu(retbuf->TotalBytesWritten) > le32_to_cpu(pcchunk->Length)) { - cifs_dbg(VFS, "invalid copy chunk response\n"); + cifs_tcon_dbg(VFS, "invalid copy chunk response\n"); rc = -EIO; goto cchunk_out; } if (le32_to_cpu(retbuf->ChunksWritten) != 1) { - cifs_dbg(VFS, "invalid num chunks written\n"); + cifs_tcon_dbg(VFS, "invalid num chunks written\n"); rc = -EIO; goto cchunk_out; } @@ -1954,6 +2078,66 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, return rc; } + + +static int +smb3_notify(const unsigned int xid, struct file *pfile, + void __user *ioc_buf) +{ + struct smb3_notify notify; + struct dentry *dentry = pfile->f_path.dentry; + struct inode *inode = file_inode(pfile); + struct cifs_sb_info *cifs_sb; + struct cifs_open_parms oparms; + struct cifs_fid fid; + struct cifs_tcon *tcon; + unsigned char *path = NULL; + __le16 *utf16_path = NULL; + u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + int rc = 0; + + path = build_path_from_dentry(dentry); + if (path == NULL) + return -ENOMEM; + + cifs_sb = CIFS_SB(inode->i_sb); + + utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb); + if (utf16_path == NULL) { + rc = -ENOMEM; + goto notify_exit; + } + + if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { + rc = -EFAULT; + goto notify_exit; + } + + tcon = cifs_sb_master_tcon(cifs_sb); + oparms.tcon = tcon; + oparms.desired_access = FILE_READ_ATTRIBUTES; + oparms.disposition = FILE_OPEN; + oparms.create_options = cifs_create_options(cifs_sb, 0); + oparms.fid = &fid; + oparms.reconnect = false; + + rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL); + if (rc) + goto notify_exit; + + rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, + notify.watch_tree, notify.completion_filter); + + SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); + + cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); + +notify_exit: + kfree(path); + kfree(utf16_path); + return rc; +} + static int smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, const char *path, struct cifs_sb_info *cifs_sb, @@ -1961,40 +2145,109 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_search_info *srch_inf) { __le16 *utf16_path; - int rc; - __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + struct smb_rqst rqst[2]; + struct kvec rsp_iov[2]; + int resp_buftype[2]; + struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; + struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; + int rc, flags = 0; + u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; + struct smb2_query_directory_rsp *qd_rsp = NULL; + struct smb2_create_rsp *op_rsp = NULL; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; + if (smb3_encryption_required(tcon)) + flags |= CIFS_TRANSFORM_REQ; + + memset(rqst, 0, sizeof(rqst)); + resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; + memset(rsp_iov, 0, sizeof(rsp_iov)); + + /* Open */ + memset(&open_iov, 0, sizeof(open_iov)); + rqst[0].rq_iov = open_iov; + rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; + oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA; oparms.disposition = FILE_OPEN; - if (backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = fid; oparms.reconnect = false; - rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL); - kfree(utf16_path); - if (rc) { - cifs_dbg(FYI, "open dir failed rc=%d\n", rc); - return rc; - } + rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path); + if (rc) + goto qdf_free; + smb2_set_next_command(tcon, &rqst[0]); + /* Query directory */ srch_inf->entries_in_buffer = 0; srch_inf->index_of_last_entry = 2; - rc = SMB2_query_directory(xid, tcon, fid->persistent_fid, - fid->volatile_fid, 0, srch_inf); - if (rc) { - cifs_dbg(FYI, "query directory failed rc=%d\n", rc); + memset(&qd_iov, 0, sizeof(qd_iov)); + rqst[1].rq_iov = qd_iov; + rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; + + rc = SMB2_query_directory_init(xid, tcon, &rqst[1], + COMPOUND_FID, COMPOUND_FID, + 0, srch_inf->info_level); + if (rc) + goto qdf_free; + + smb2_set_related(&rqst[1]); + + rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst, + resp_buftype, rsp_iov); + + /* If the open failed there is nothing to do */ + op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; + if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) { + cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); + goto qdf_free; + } + fid->persistent_fid = op_rsp->PersistentFileId; + fid->volatile_fid = op_rsp->VolatileFileId; + + /* Anything else than ENODATA means a genuine error */ + if (rc && rc != -ENODATA) { SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); + cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); + trace_smb3_query_dir_err(xid, fid->persistent_fid, + tcon->tid, tcon->ses->Suid, 0, 0, rc); + goto qdf_free; + } + + qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; + if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) { + trace_smb3_query_dir_done(xid, fid->persistent_fid, + tcon->tid, tcon->ses->Suid, 0, 0); + srch_inf->endOfSearch = true; + rc = 0; + goto qdf_free; } + + rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], + srch_inf); + if (rc) { + trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, + tcon->ses->Suid, 0, 0, rc); + goto qdf_free; + } + resp_buftype[1] = CIFS_NO_BUFFER; + + trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, + tcon->ses->Suid, 0, srch_inf->entries_in_buffer); + + qdf_free: + kfree(utf16_path); + SMB2_open_free(&rqst[0]); + SMB2_query_directory_free(&rqst[1]); + free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); + free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); return rc; } @@ -2176,10 +2429,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.desired_access = desired_access; oparms.disposition = FILE_OPEN; - if (cifs_sb && backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -2205,7 +2455,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto qic_exit; smb2_set_related(&rqst[2]); @@ -2214,6 +2464,11 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, resp_buftype, rsp_iov); if (rc) { free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); + if (rc == -EREMCHG) { + tcon->need_reconnect = true; + printk_once(KERN_WARNING "server share %s deleted\n", + tcon->treeName); + } goto qic_exit; } *rsp = rsp_iov[1]; @@ -2230,7 +2485,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, static int smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, - struct kstatfs *buf) + struct cifs_sb_info *cifs_sb, struct kstatfs *buf) { struct smb2_query_info_rsp *rsp; struct smb2_fs_full_size_info *info = NULL; @@ -2245,7 +2500,7 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, FS_FULL_SIZE_INFORMATION, SMB2_O_INFO_FILESYSTEM, sizeof(struct smb2_fs_full_size_info), - &rsp_iov, &buftype, NULL); + &rsp_iov, &buftype, cifs_sb); if (rc) goto qfs_exit; @@ -2267,7 +2522,7 @@ qfs_exit: static int smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, - struct kstatfs *buf) + struct cifs_sb_info *cifs_sb, struct kstatfs *buf) { int rc; __le16 srch_path = 0; /* Null - open root of share */ @@ -2276,12 +2531,12 @@ smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid fid; if (!tcon->posix_extensions) - return smb2_queryfs(xid, tcon, buf); + return smb2_queryfs(xid, tcon, cifs_sb, buf); oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; - oparms.create_options = 0; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -2401,7 +2656,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, if (rc) { if ((rc != -ENOENT) && (rc != -EOPNOTSUPP)) - cifs_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc); + cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc); goto out; } @@ -2410,7 +2665,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, nls_codepage, remap, search_name, true /* is_unicode */); if (rc) { - cifs_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); + cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); goto out; } @@ -2550,6 +2805,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, struct smb2_create_rsp *create_rsp; struct smb2_ioctl_rsp *ioctl_rsp; struct reparse_data_buffer *reparse_buf; + int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0; u32 plen; cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); @@ -2576,14 +2832,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, oparms.tcon = tcon; oparms.desired_access = FILE_READ_ATTRIBUTES; oparms.disposition = FILE_OPEN; - - if (backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; - if (is_reparse_point) - oparms.create_options = OPEN_REPARSE_POINT; - + oparms.create_options = cifs_create_options(cifs_sb, create_options); oparms.fid = &fid; oparms.reconnect = false; @@ -2600,7 +2849,10 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid, fid.volatile_fid, FSCTL_GET_REPARSE_POINT, - true /* is_fctl */, NULL, 0, CIFSMaxBufSize); + true /* is_fctl */, NULL, 0, + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE); if (rc) goto querty_exit; @@ -2613,7 +2865,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, rqst[2].rq_iov = close_iov; rqst[2].rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID); + rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto querty_exit; @@ -2640,7 +2892,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) > rsp_iov[1].iov_len) { - cifs_dbg(VFS, "srv returned invalid ioctl len: %d\n", + cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n", plen); rc = -EIO; goto querty_exit; @@ -2759,11 +3011,6 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, tcon = tlink_tcon(tlink); xid = get_xid(); - if (backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; - utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; @@ -2774,6 +3021,7 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, oparms.tcon = tcon; oparms.desired_access = READ_CONTROL; oparms.disposition = FILE_OPEN; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; oparms.reconnect = false; @@ -2815,11 +3063,6 @@ set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, tcon = tlink_tcon(tlink); xid = get_xid(); - if (backup_cred(cifs_sb)) - oparms.create_options = CREATE_OPEN_BACKUP_INTENT; - else - oparms.create_options = 0; - if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP) access_flags = WRITE_OWNER; else @@ -2834,6 +3077,7 @@ set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, oparms.tcon = tcon; oparms.desired_access = access_flags; + oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.disposition = FILE_OPEN; oparms.path = path; oparms.fid = &fid; @@ -2939,7 +3183,6 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, loff_t offset, loff_t len) { struct inode *inode; - struct cifsInodeInfo *cifsi; struct cifsFileInfo *cfile = file->private_data; struct file_zero_data_information fsctl_buf; long rc; @@ -2949,7 +3192,6 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, xid = get_xid(); inode = d_inode(cfile->dentry); - cifsi = CIFS_I(inode); /* Need to make file sparse, if not already, before freeing range. */ /* Consider adding equivalent for compressed since it could also work */ @@ -3000,28 +3242,32 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, } /* + * Extending the file + */ + if ((keep_size == false) && i_size_read(inode) < off + len) { + if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) + smb2_set_sparse(xid, tcon, cfile, inode, false); + + eof = cpu_to_le64(off + len); + rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, + cfile->fid.volatile_fid, cfile->pid, &eof); + if (rc == 0) { + cifsi->server_eof = off + len; + cifs_setsize(inode, off + len); + cifs_truncate_page(inode->i_mapping, inode->i_size); + truncate_setsize(inode, off + len); + } + goto out; + } + + /* * Files are non-sparse by default so falloc may be a no-op - * Must check if file sparse. If not sparse, and not extending - * then no need to do anything since file already allocated + * Must check if file sparse. If not sparse, and since we are not + * extending then no need to do anything since file already allocated */ if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { - if (keep_size == true) - rc = 0; - /* check if extending file */ - else if (i_size_read(inode) >= off + len) - /* not extending file and already not sparse */ - rc = 0; - /* BB: in future add else clause to extend file */ - else - rc = -EOPNOTSUPP; - if (rc) - trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, - tcon->tid, tcon->ses->Suid, off, len, rc); - else - trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, - tcon->tid, tcon->ses->Suid, off, len); - free_xid(xid); - return rc; + rc = 0; + goto out; } if ((keep_size == true) || (i_size_read(inode) >= off + len)) { @@ -3035,25 +3281,14 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, */ if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { rc = -EOPNOTSUPP; - trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, - tcon->tid, tcon->ses->Suid, off, len, rc); - free_xid(xid); - return rc; - } - - smb2_set_sparse(xid, tcon, cfile, inode, false); - rc = 0; - } else { - smb2_set_sparse(xid, tcon, cfile, inode, false); - rc = 0; - if (i_size_read(inode) < off + len) { - eof = cpu_to_le64(off + len); - rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, - cfile->fid.volatile_fid, cfile->pid, - &eof); + goto out; } } + smb2_set_sparse(xid, tcon, cfile, inode, false); + rc = 0; + +out: if (rc) trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); @@ -3243,22 +3478,38 @@ static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, static void smb2_downgrade_oplock(struct TCP_Server_Info *server, - struct cifsInodeInfo *cinode, bool set_level2) + struct cifsInodeInfo *cinode, __u32 oplock, + unsigned int epoch, bool *purge_cache) { - if (set_level2) - server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II, - 0, NULL); - else - server->ops->set_oplock_level(cinode, 0, 0, NULL); + server->ops->set_oplock_level(cinode, oplock, 0, NULL); } static void -smb21_downgrade_oplock(struct TCP_Server_Info *server, - struct cifsInodeInfo *cinode, bool set_level2) +smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, + unsigned int epoch, bool *purge_cache); + +static void +smb3_downgrade_oplock(struct TCP_Server_Info *server, + struct cifsInodeInfo *cinode, __u32 oplock, + unsigned int epoch, bool *purge_cache) { - server->ops->set_oplock_level(cinode, - set_level2 ? SMB2_LEASE_READ_CACHING_HE : - 0, 0, NULL); + unsigned int old_state = cinode->oplock; + unsigned int old_epoch = cinode->epoch; + unsigned int new_state; + + if (epoch > old_epoch) { + smb21_set_oplock_level(cinode, oplock, 0, NULL); + cinode->epoch = epoch; + } + + new_state = cinode->oplock; + *purge_cache = false; + + if ((old_state & CIFS_CACHE_READ_FLG) != 0 && + (new_state & CIFS_CACHE_READ_FLG) == 0) + *purge_cache = true; + else if (old_state == new_state && (epoch - old_epoch > 1)) + *purge_cache = true; } static void @@ -3295,6 +3546,11 @@ smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) return; + /* Check if the server granted an oplock rather than a lease */ + if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) + return smb2_set_oplock_level(cinode, oplock, epoch, + purge_cache); + if (oplock & SMB2_LEASE_READ_CACHING_HE) { new_oplock |= CIFS_CACHE_READ_FLG; strcat(message, "R"); @@ -3555,14 +3811,16 @@ smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) u8 *ses_enc_key; spin_lock(&cifs_tcp_ses_lock); - list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { - if (ses->Suid != ses_id) - continue; - ses_enc_key = enc ? ses->smb3encryptionkey : - ses->smb3decryptionkey; - memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE); - spin_unlock(&cifs_tcp_ses_lock); - return 0; + list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { + list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + if (ses->Suid == ses_id) { + ses_enc_key = enc ? ses->smb3encryptionkey : + ses->smb3decryptionkey; + memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE); + spin_unlock(&cifs_tcp_ses_lock); + return 0; + } + } } spin_unlock(&cifs_tcp_ses_lock); @@ -3595,14 +3853,14 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst, rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key); if (rc) { - cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__, + cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__, enc ? "en" : "de"); return 0; } rc = smb3_crypto_aead_allocate(server); if (rc) { - cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); + cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); return rc; } @@ -3610,19 +3868,19 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst, server->secmech.ccmaesdecrypt; rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE); if (rc) { - cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); + cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); return rc; } rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); if (rc) { - cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); + cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); return rc; } req = aead_request_alloc(tfm, GFP_KERNEL); if (!req) { - cifs_dbg(VFS, "%s: Failed to alloc aead request\n", __func__); + cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__); return -ENOMEM; } @@ -3633,7 +3891,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst, sg = init_sg(num_rqst, rqst, sign); if (!sg) { - cifs_dbg(VFS, "%s: Failed to init sg\n", __func__); + cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__); rc = -ENOMEM; goto free_req; } @@ -3641,7 +3899,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst, iv_len = crypto_aead_ivsize(tfm); iv = kzalloc(iv_len, GFP_KERNEL); if (!iv) { - cifs_dbg(VFS, "%s: Failed to alloc iv\n", __func__); + cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__); rc = -ENOMEM; goto free_sg; } @@ -3883,7 +4141,7 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, bool use_rdma_mr = false; if (shdr->Command != SMB2_READ) { - cifs_dbg(VFS, "only big read responses are supported\n"); + cifs_server_dbg(VFS, "only big read responses are supported\n"); return -ENOTSUPP; } @@ -3998,8 +4256,56 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, return length; } +struct smb2_decrypt_work { + struct work_struct decrypt; + struct TCP_Server_Info *server; + struct page **ppages; + char *buf; + unsigned int npages; + unsigned int len; +}; + + +static void smb2_decrypt_offload(struct work_struct *work) +{ + struct smb2_decrypt_work *dw = container_of(work, + struct smb2_decrypt_work, decrypt); + int i, rc; + struct mid_q_entry *mid; + + rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, + dw->ppages, dw->npages, dw->len); + if (rc) { + cifs_dbg(VFS, "error decrypting rc=%d\n", rc); + goto free_pages; + } + + dw->server->lstrp = jiffies; + mid = smb2_find_mid(dw->server, dw->buf); + if (mid == NULL) + cifs_dbg(FYI, "mid not found\n"); + else { + mid->decrypted = true; + rc = handle_read_data(dw->server, mid, dw->buf, + dw->server->vals->read_rsp_size, + dw->ppages, dw->npages, dw->len); + mid->callback(mid); + cifs_mid_q_entry_release(mid); + } + +free_pages: + for (i = dw->npages-1; i >= 0; i--) + put_page(dw->ppages[i]); + + kfree(dw->ppages); + cifs_small_buf_release(dw->buf); + kfree(dw); +} + + static int -receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid) +receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, + int *num_mids) { char *buf = server->smallbuf; struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; @@ -4009,7 +4315,9 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid) unsigned int buflen = server->pdu_size; int rc; int i = 0; + struct smb2_decrypt_work *dw; + *num_mids = 1; len = min_t(unsigned int, buflen, server->vals->read_rsp_size + sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; @@ -4045,6 +4353,32 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid) if (rc) goto free_pages; + /* + * For large reads, offload to different thread for better performance, + * use more cores decrypting which can be expensive + */ + + if ((server->min_offload) && (server->in_flight > 1) && + (server->pdu_size >= server->min_offload)) { + dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); + if (dw == NULL) + goto non_offloaded_decrypt; + + dw->buf = server->smallbuf; + server->smallbuf = (char *)cifs_small_buf_get(); + + INIT_WORK(&dw->decrypt, smb2_decrypt_offload); + + dw->npages = npages; + dw->server = server; + dw->ppages = pages; + dw->len = len; + queue_work(decrypt_wq, &dw->decrypt); + *num_mids = 0; /* worker thread takes care of finding mid */ + return -1; + } + +non_offloaded_decrypt: rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, pages, npages, len); if (rc) @@ -4129,7 +4463,7 @@ one_more: } if (*num_mids >= MAX_COMPOUND) { - cifs_dbg(VFS, "too many PDUs in compound\n"); + cifs_server_dbg(VFS, "too many PDUs in compound\n"); return -1; } bufs[*num_mids] = buf; @@ -4175,7 +4509,7 @@ smb3_receive_transform(struct TCP_Server_Info *server, if (pdu_length < sizeof(struct smb2_transform_hdr) + sizeof(struct smb2_sync_hdr)) { - cifs_dbg(VFS, "Transform message is too small (%u)\n", + cifs_server_dbg(VFS, "Transform message is too small (%u)\n", pdu_length); cifs_reconnect(server); wake_up(&server->response_q); @@ -4183,7 +4517,7 @@ smb3_receive_transform(struct TCP_Server_Info *server, } if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { - cifs_dbg(VFS, "Transform message is broken\n"); + cifs_server_dbg(VFS, "Transform message is broken\n"); cifs_reconnect(server); wake_up(&server->response_q); return -ECONNABORTED; @@ -4191,8 +4525,7 @@ smb3_receive_transform(struct TCP_Server_Info *server, /* TODO: add support for compounds containing READ. */ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { - *num_mids = 1; - return receive_encrypted_read(server, &mids[0]); + return receive_encrypted_read(server, &mids[0], num_mids); } return receive_encrypted_standard(server, mids, bufs, num_mids); @@ -4227,7 +4560,6 @@ smb2_make_node(unsigned int xid, struct inode *inode, { struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); int rc = -EPERM; - int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; FILE_ALL_INFO *buf = NULL; struct cifs_io_parms io_parms; __u32 oplock = 0; @@ -4263,13 +4595,11 @@ smb2_make_node(unsigned int xid, struct inode *inode, goto out; } - if (backup_cred(cifs_sb)) - create_options |= CREATE_OPEN_BACKUP_INTENT; - oparms.tcon = tcon; oparms.cifs_sb = cifs_sb; oparms.desired_access = GENERIC_WRITE; - oparms.create_options = create_options; + oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | + CREATE_OPTION_SPECIAL); oparms.disposition = FILE_CREATE; oparms.path = full_path; oparms.fid = &fid; @@ -4438,7 +4768,7 @@ struct smb_version_operations smb21_operations = { .print_stats = smb2_print_stats, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, - .downgrade_oplock = smb21_downgrade_oplock, + .downgrade_oplock = smb2_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb2_negotiate_wsize, @@ -4498,6 +4828,7 @@ struct smb_version_operations smb21_operations = { .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .enum_snapshots = smb3_enum_snapshots, + .notify = smb3_notify, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR @@ -4538,7 +4869,7 @@ struct smb_version_operations smb30_operations = { .dump_share_caps = smb2_dump_share_caps, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, - .downgrade_oplock = smb21_downgrade_oplock, + .downgrade_oplock = smb3_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb3_negotiate_wsize, @@ -4570,6 +4901,7 @@ struct smb_version_operations smb30_operations = { .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, + .close_getattr = smb2_close_getattr, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, @@ -4603,6 +4935,7 @@ struct smb_version_operations smb30_operations = { .dir_needs_close = smb2_dir_needs_close, .fallocate = smb3_fallocate, .enum_snapshots = smb3_enum_snapshots, + .notify = smb3_notify, .init_transform_rq = smb3_init_transform_rq, .is_transform_hdr = smb3_is_transform_hdr, .receive_transform = smb3_receive_transform, @@ -4646,7 +4979,7 @@ struct smb_version_operations smb311_operations = { .dump_share_caps = smb2_dump_share_caps, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, - .downgrade_oplock = smb21_downgrade_oplock, + .downgrade_oplock = smb3_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb3_negotiate_wsize, @@ -4679,6 +5012,7 @@ struct smb_version_operations smb311_operations = { .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, + .close_getattr = smb2_close_getattr, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, @@ -4712,6 +5046,7 @@ struct smb_version_operations smb311_operations = { .dir_needs_close = smb2_dir_needs_close, .fallocate = smb3_fallocate, .enum_snapshots = smb3_enum_snapshots, + .notify = smb3_notify, .init_transform_rq = smb3_init_transform_rq, .is_transform_hdr = smb3_is_transform_hdr, .receive_transform = smb3_receive_transform, diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 31e4a1b0b170..1234f9ccab03 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -252,7 +252,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) if (tcon == NULL) return 0; - if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) + if (smb2_command == SMB2_TREE_CONNECT) return 0; if (tcon->tidStatus == CifsExiting) { @@ -312,7 +312,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) if (server->tcpStatus != CifsNeedReconnect) break; - if (--retries) + if (retries && --retries) continue; /* @@ -350,9 +350,14 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) } rc = cifs_negotiate_protocol(0, tcon->ses); - if (!rc && tcon->ses->need_reconnect) + if (!rc && tcon->ses->need_reconnect) { rc = cifs_setup_session(0, tcon->ses, nls_codepage); - + if ((rc == -EACCES) && !tcon->retry) { + rc = -EHOSTDOWN; + mutex_unlock(&tcon->ses->session_mutex); + goto failed; + } + } if (rc || !tcon->need_reconnect) { mutex_unlock(&tcon->ses->session_mutex); goto out; @@ -397,6 +402,7 @@ out: case SMB2_SET_INFO: rc = -EAGAIN; } +failed: unload_nls(nls_codepage); return rc; } @@ -426,16 +432,9 @@ fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf, * SMB information in the SMB header. If the return code is zero, this * function must have filled in request_buf pointer. */ -static int -smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, - void **request_buf, unsigned int *total_len) +static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, + void **request_buf, unsigned int *total_len) { - int rc; - - rc = smb2_reconnect(smb2_command, tcon); - if (rc) - return rc; - /* BB eventually switch this to SMB2 specific small buf size */ if (smb2_command == SMB2_SET_INFO) *request_buf = cifs_buf_get(); @@ -456,7 +455,31 @@ smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, cifs_stats_inc(&tcon->num_smbs_sent); } - return rc; + return 0; +} + +static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, + void **request_buf, unsigned int *total_len) +{ + int rc; + + rc = smb2_reconnect(smb2_command, tcon); + if (rc) + return rc; + + return __smb2_plain_req_init(smb2_command, tcon, request_buf, + total_len); +} + +static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, + void **request_buf, unsigned int *total_len) +{ + /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ + if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { + return __smb2_plain_req_init(SMB2_IOCTL, tcon, request_buf, + total_len); + } + return smb2_plain_req_init(SMB2_IOCTL, tcon, request_buf, total_len); } /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ @@ -503,8 +526,7 @@ build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; /* copy up to max of first 100 bytes of server name to NetName field */ - pneg_ctxt->DataLength = cpu_to_le16(2 + - (2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp))); + pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); /* context size is DataLength + minimal smb2_neg_context */ return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8) * 8; @@ -538,12 +560,12 @@ static void assemble_neg_contexts(struct smb2_negotiate_req *req, struct TCP_Server_Info *server, unsigned int *total_len) { - char *pneg_ctxt = (char *)req; + char *pneg_ctxt; unsigned int ctxt_len; if (*total_len > 200) { /* In case length corrupted don't want to overrun smb buffer */ - cifs_dbg(VFS, "Bad frame length assembling neg contexts\n"); + cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); return; } @@ -661,7 +683,7 @@ static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); if (len_of_smb <= offset) { - cifs_dbg(VFS, "Invalid response: negotiate context offset\n"); + cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); return -EINVAL; } @@ -693,7 +715,7 @@ static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) server->posix_ext_supported = true; else - cifs_dbg(VFS, "unknown negcontext of type %d ignored\n", + cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", le16_to_cpu(pctx->ContextType)); if (rc) @@ -752,6 +774,8 @@ add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) unsigned int num = *num_iovec; iov[num].iov_base = create_posix_buf(mode); + if (mode == ACL_NO_MODE) + cifs_dbg(FYI, "illegal mode\n"); if (iov[num].iov_base == NULL) return -ENOMEM; iov[num].iov_len = sizeof(struct create_posix); @@ -790,7 +814,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) struct kvec rsp_iov; int rc = 0; int resp_buftype; - struct TCP_Server_Info *server = ses->server; + struct TCP_Server_Info *server = cifs_ses_server(ses); int blob_offset, blob_length; char *security_blob; int flags = CIFS_NEG_OP; @@ -812,13 +836,13 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); - if (strcmp(ses->server->vals->version_string, + if (strcmp(server->vals->version_string, SMB3ANY_VERSION_STRING) == 0) { req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); req->DialectCount = cpu_to_le16(2); total_len += 4; - } else if (strcmp(ses->server->vals->version_string, + } else if (strcmp(server->vals->version_string, SMBDEFAULT_VERSION_STRING) == 0) { req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); @@ -828,7 +852,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) total_len += 8; } else { /* otherwise send specific dialect */ - req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); + req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); req->DialectCount = cpu_to_le16(1); total_len += 2; } @@ -841,16 +865,16 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) else req->SecurityMode = 0; - req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); + req->Capabilities = cpu_to_le32(server->vals->req_capabilities); /* ClientGUID must be zero for SMB2.02 dialect */ - if (ses->server->vals->protocol_id == SMB20_PROT_ID) + if (server->vals->protocol_id == SMB20_PROT_ID) memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); else { memcpy(req->ClientGUID, server->client_guid, SMB2_CLIENT_GUID_SIZE); - if ((ses->server->vals->protocol_id == SMB311_PROT_ID) || - (strcmp(ses->server->vals->version_string, + if ((server->vals->protocol_id == SMB311_PROT_ID) || + (strcmp(server->vals->version_string, SMBDEFAULT_VERSION_STRING) == 0)) assemble_neg_contexts(req, server, &total_len); } @@ -869,42 +893,42 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); */ if (rc == -EOPNOTSUPP) { - cifs_dbg(VFS, "Dialect not supported by server. Consider " + cifs_server_dbg(VFS, "Dialect not supported by server. Consider " "specifying vers=1.0 or vers=2.0 on mount for accessing" " older servers\n"); goto neg_exit; } else if (rc != 0) goto neg_exit; - if (strcmp(ses->server->vals->version_string, + if (strcmp(server->vals->version_string, SMB3ANY_VERSION_STRING) == 0) { if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { - cifs_dbg(VFS, + cifs_server_dbg(VFS, "SMB2 dialect returned but not requested\n"); return -EIO; } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { - cifs_dbg(VFS, + cifs_server_dbg(VFS, "SMB2.1 dialect returned but not requested\n"); return -EIO; } - } else if (strcmp(ses->server->vals->version_string, + } else if (strcmp(server->vals->version_string, SMBDEFAULT_VERSION_STRING) == 0) { if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { - cifs_dbg(VFS, + cifs_server_dbg(VFS, "SMB2 dialect returned but not requested\n"); return -EIO; } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { /* ops set to 3.0 by default for default so update */ - ses->server->ops = &smb21_operations; - ses->server->vals = &smb21_values; + server->ops = &smb21_operations; + server->vals = &smb21_values; } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { - ses->server->ops = &smb311_operations; - ses->server->vals = &smb311_values; + server->ops = &smb311_operations; + server->vals = &smb311_values; } } else if (le16_to_cpu(rsp->DialectRevision) != - ses->server->vals->protocol_id) { + server->vals->protocol_id) { /* if requested single dialect ensure returned dialect matched */ - cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n", + cifs_server_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n", le16_to_cpu(rsp->DialectRevision)); return -EIO; } @@ -922,7 +946,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); else { - cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n", + cifs_server_dbg(VFS, "Illegal dialect returned by server 0x%x\n", le16_to_cpu(rsp->DialectRevision)); rc = -EIO; goto neg_exit; @@ -982,7 +1006,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) rc = smb311_decode_neg_context(rsp, server, rsp_iov.iov_len); else - cifs_dbg(VFS, "Missing expected negotiate contexts\n"); + cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); } neg_exit: free_rsp_buf(resp_buftype, rsp); @@ -996,11 +1020,12 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) struct validate_negotiate_info_rsp *pneg_rsp = NULL; u32 rsplen; u32 inbuflen; /* max of 4 dialects */ + struct TCP_Server_Info *server = tcon->ses->server; cifs_dbg(FYI, "validate negotiate\n"); /* In SMB3.11 preauth integrity supersedes validate negotiate */ - if (tcon->ses->server->dialect == SMB311_PROT_ID) + if (server->dialect == SMB311_PROT_ID) return 0; /* @@ -1019,15 +1044,15 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) } if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) - cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); + cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); if (!pneg_inbuf) return -ENOMEM; pneg_inbuf->Capabilities = - cpu_to_le32(tcon->ses->server->vals->req_capabilities); - memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid, + cpu_to_le32(server->vals->req_capabilities); + memcpy(pneg_inbuf->Guid, server->client_guid, SMB2_CLIENT_GUID_SIZE); if (tcon->ses->sign) @@ -1040,7 +1065,7 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) pneg_inbuf->SecurityMode = 0; - if (strcmp(tcon->ses->server->vals->version_string, + if (strcmp(server->vals->version_string, SMB3ANY_VERSION_STRING) == 0) { pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); @@ -1048,7 +1073,7 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) /* structure is big enough for 3 dialects, sending only 2 */ inbuflen = sizeof(*pneg_inbuf) - (2 * sizeof(pneg_inbuf->Dialects[0])); - } else if (strcmp(tcon->ses->server->vals->version_string, + } else if (strcmp(server->vals->version_string, SMBDEFAULT_VERSION_STRING) == 0) { pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); @@ -1060,7 +1085,7 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) } else { /* otherwise specific dialect was requested */ pneg_inbuf->Dialects[0] = - cpu_to_le16(tcon->ses->server->vals->protocol_id); + cpu_to_le16(server->vals->protocol_id); pneg_inbuf->DialectCount = cpu_to_le16(1); /* structure is big enough for 3 dialects, sending only 1 */ inbuflen = sizeof(*pneg_inbuf) - @@ -1076,18 +1101,18 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) * Old Windows versions or Netapp SMB server can return * not supported error. Client should accept it. */ - cifs_dbg(VFS, "Server does not support validate negotiate\n"); + cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); rc = 0; goto out_free_inbuf; } else if (rc != 0) { - cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); + cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); rc = -EIO; goto out_free_inbuf; } rc = -EIO; if (rsplen != sizeof(*pneg_rsp)) { - cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n", + cifs_tcon_dbg(VFS, "invalid protocol negotiate response size: %d\n", rsplen); /* relax check since Mac returns max bufsize allowed on ioctl */ @@ -1096,16 +1121,16 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) } /* check validate negotiate info response matches what we got earlier */ - if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect)) + if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) goto vneg_out; - if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode)) + if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) goto vneg_out; /* do not validate server guid because not saved at negprot time yet */ if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | - SMB2_LARGE_FILES) != tcon->ses->server->capabilities) + SMB2_LARGE_FILES) != server->capabilities) goto vneg_out; /* validate negotiate successful */ @@ -1114,7 +1139,7 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) goto out_free_rsp; vneg_out: - cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n"); + cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); out_free_rsp: kfree(pneg_rsp); out_free_inbuf: @@ -1169,7 +1194,7 @@ SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) int rc; struct cifs_ses *ses = sess_data->ses; struct smb2_sess_setup_req *req; - struct TCP_Server_Info *server = ses->server; + struct TCP_Server_Info *server = cifs_ses_server(ses); unsigned int total_len; rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req, @@ -1177,13 +1202,21 @@ SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) if (rc) return rc; - /* First session, not a reauthenticate */ - req->sync_hdr.SessionId = 0; - - /* if reconnect, we need to send previous sess id, otherwise it is 0 */ - req->PreviousSessionId = sess_data->previous_session; - - req->Flags = 0; /* MBZ */ + if (sess_data->ses->binding) { + req->sync_hdr.SessionId = sess_data->ses->Suid; + req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; + req->PreviousSessionId = 0; + req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; + } else { + /* First session, not a reauthenticate */ + req->sync_hdr.SessionId = 0; + /* + * if reconnect, we need to send previous sess id + * otherwise it is 0 + */ + req->PreviousSessionId = sess_data->previous_session; + req->Flags = 0; /* MBZ */ + } /* enough to enable echos and oplocks and one max size write */ req->sync_hdr.CreditRequest = cpu_to_le16(130); @@ -1256,28 +1289,33 @@ SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) { int rc = 0; struct cifs_ses *ses = sess_data->ses; + struct TCP_Server_Info *server = cifs_ses_server(ses); - mutex_lock(&ses->server->srv_mutex); - if (ses->server->ops->generate_signingkey) { - rc = ses->server->ops->generate_signingkey(ses); + mutex_lock(&server->srv_mutex); + if (server->ops->generate_signingkey) { + rc = server->ops->generate_signingkey(ses); if (rc) { cifs_dbg(FYI, "SMB3 session key generation failed\n"); - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); return rc; } } - if (!ses->server->session_estab) { - ses->server->sequence_number = 0x2; - ses->server->session_estab = true; + if (!server->session_estab) { + server->sequence_number = 0x2; + server->session_estab = true; } - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); cifs_dbg(FYI, "SMB2/3 session established successfully\n"); - spin_lock(&GlobalMid_Lock); - ses->status = CifsGood; - ses->need_reconnect = false; - spin_unlock(&GlobalMid_Lock); + /* keep existing ses state if binding */ + if (!ses->binding) { + spin_lock(&GlobalMid_Lock); + ses->status = CifsGood; + ses->need_reconnect = false; + spin_unlock(&GlobalMid_Lock); + } + return rc; } @@ -1315,16 +1353,19 @@ SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) goto out_put_spnego_key; } - ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, - GFP_KERNEL); - if (!ses->auth_key.response) { - cifs_dbg(VFS, - "Kerberos can't allocate (%u bytes) memory", - msg->sesskey_len); - rc = -ENOMEM; - goto out_put_spnego_key; + /* keep session key if binding */ + if (!ses->binding) { + ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, + GFP_KERNEL); + if (!ses->auth_key.response) { + cifs_dbg(VFS, + "Kerberos can't allocate (%u bytes) memory", + msg->sesskey_len); + rc = -ENOMEM; + goto out_put_spnego_key; + } + ses->auth_key.len = msg->sesskey_len; } - ses->auth_key.len = msg->sesskey_len; sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; sess_data->iov[1].iov_len = msg->secblob_len; @@ -1334,9 +1375,11 @@ SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) goto out_put_spnego_key; rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; - ses->Suid = rsp->sync_hdr.SessionId; - - ses->session_flags = le16_to_cpu(rsp->SessionFlags); + /* keep session id and flags if binding */ + if (!ses->binding) { + ses->Suid = rsp->sync_hdr.SessionId; + ses->session_flags = le16_to_cpu(rsp->SessionFlags); + } rc = SMB2_sess_establish_session(sess_data); out_put_spnego_key: @@ -1430,9 +1473,11 @@ SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); - - ses->Suid = rsp->sync_hdr.SessionId; - ses->session_flags = le16_to_cpu(rsp->SessionFlags); + /* keep existing ses id and flags if binding */ + if (!ses->binding) { + ses->Suid = rsp->sync_hdr.SessionId; + ses->session_flags = le16_to_cpu(rsp->SessionFlags); + } out: kfree(ntlmssp_blob); @@ -1489,8 +1534,11 @@ SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; - ses->Suid = rsp->sync_hdr.SessionId; - ses->session_flags = le16_to_cpu(rsp->SessionFlags); + /* keep existing ses id and flags if binding */ + if (!ses->binding) { + ses->Suid = rsp->sync_hdr.SessionId; + ses->session_flags = le16_to_cpu(rsp->SessionFlags); + } rc = SMB2_sess_establish_session(sess_data); out: @@ -1507,7 +1555,7 @@ SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data) { int type; - type = smb2_select_sectype(ses->server, ses->sectype); + type = smb2_select_sectype(cifs_ses_server(ses), ses->sectype); cifs_dbg(FYI, "sess setup type %d\n", type); if (type == Unspecified) { cifs_dbg(VFS, @@ -1535,7 +1583,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *nls_cp) { int rc = 0; - struct TCP_Server_Info *server = ses->server; + struct TCP_Server_Info *server = cifs_ses_server(ses); struct SMB2_sess_data *sess_data; cifs_dbg(FYI, "Session Setup\n"); @@ -1561,14 +1609,14 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, /* * Initialize the session hash with the server one. */ - memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash, + memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, SMB2_PREAUTH_HASH_SIZE); while (sess_data->func) sess_data->func(sess_data); if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) - cifs_dbg(VFS, "signing requested but authenticated as guest\n"); + cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); rc = sess_data->result; out: kfree(sess_data); @@ -1661,10 +1709,11 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, __le16 *unc_path = NULL; int flags = 0; unsigned int total_len; + struct TCP_Server_Info *server = ses->server; cifs_dbg(FYI, "TCON\n"); - if (!(ses->server) || !tree) + if (!server || !tree) return -EIO; unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); @@ -1707,7 +1756,7 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 * (Samba servers don't always set the flag so also check if null user) */ - if ((ses->server->dialect == SMB311_PROT_ID) && + if ((server->dialect == SMB311_PROT_ID) && !smb3_encryption_required(tcon) && !(ses->session_flags & (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && @@ -1746,7 +1795,7 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, cifs_dbg(FYI, "connection to printer\n"); break; default: - cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); + cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); rc = -EOPNOTSUPP; goto tcon_error_exit; } @@ -1761,15 +1810,15 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) - cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); + cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); if (tcon->seal && - !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) - cifs_dbg(VFS, "Encryption is requested but not supported\n"); + !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) + cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); init_copy_chunk_defaults(tcon); - if (tcon->ses->server->ops->validate_negotiate) - rc = tcon->ses->server->ops->validate_negotiate(xid, tcon); + if (server->ops->validate_negotiate) + rc = server->ops->validate_negotiate(xid, tcon); tcon_exit: free_rsp_buf(resp_buftype, rsp); @@ -1778,7 +1827,7 @@ tcon_exit: tcon_error_exit: if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) { - cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); + cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); } goto tcon_exit; } @@ -1804,6 +1853,8 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) return 0; + close_shroot_lease(&tcon->crfid); + rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req, &total_len); if (rc) @@ -1888,6 +1939,16 @@ parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) buf->IndexNumber = pdisk_id->DiskFileId; } +static void +parse_posix_ctxt(struct create_context *cc, struct smb_posix_info *pposix_inf) +{ + /* struct smb_posix_info *ppinf = (struct smb_posix_info *)cc; */ + + /* TODO: Need to add parsing for the context and return */ + printk_once(KERN_WARNING + "SMB3 3.11 POSIX response context not completed yet\n"); +} + void smb2_parse_contexts(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, @@ -1899,6 +1960,9 @@ smb2_parse_contexts(struct TCP_Server_Info *server, unsigned int next; unsigned int remaining; char *name; + const char smb3_create_tag_posix[] = {0x93, 0xAD, 0x25, 0x50, 0x9C, + 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, + 0xDE, 0x96, 0x8B, 0xCD, 0x7C}; *oplock = 0; data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset); @@ -1918,6 +1982,15 @@ smb2_parse_contexts(struct TCP_Server_Info *server, else if (buf && (le16_to_cpu(cc->NameLength) == 4) && strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0) parse_query_id_ctxt(cc, buf); + else if ((le16_to_cpu(cc->NameLength) == 16)) { + if (memcmp(name, smb3_create_tag_posix, 16) == 0) + parse_posix_ctxt(cc, NULL); + } + /* else { + cifs_dbg(FYI, "Context not matched with len %d\n", + le16_to_cpu(cc->NameLength)); + cifs_dump_mem("Cctxt name: ", name, 4); + } */ next = le32_to_cpu(cc->Next); if (!next) @@ -2146,6 +2219,77 @@ add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) return 0; } +/* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ +static struct crt_sd_ctxt * +create_sd_buf(umode_t mode, unsigned int *len) +{ + struct crt_sd_ctxt *buf; + struct cifs_ace *pace; + unsigned int sdlen, acelen; + + *len = roundup(sizeof(struct crt_sd_ctxt) + sizeof(struct cifs_ace) * 2, + 8); + buf = kzalloc(*len, GFP_KERNEL); + if (buf == NULL) + return buf; + + sdlen = sizeof(struct smb3_sd) + sizeof(struct smb3_acl) + + 2 * sizeof(struct cifs_ace); + + buf->ccontext.DataOffset = cpu_to_le16(offsetof + (struct crt_sd_ctxt, sd)); + buf->ccontext.DataLength = cpu_to_le32(sdlen); + buf->ccontext.NameOffset = cpu_to_le16(offsetof + (struct crt_sd_ctxt, Name)); + buf->ccontext.NameLength = cpu_to_le16(4); + /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ + buf->Name[0] = 'S'; + buf->Name[1] = 'e'; + buf->Name[2] = 'c'; + buf->Name[3] = 'D'; + buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ + /* + * ACL is "self relative" ie ACL is stored in contiguous block of memory + * and "DP" ie the DACL is present + */ + buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); + + /* offset owner, group and Sbz1 and SACL are all zero */ + buf->sd.OffsetDacl = cpu_to_le32(sizeof(struct smb3_sd)); + buf->acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ + + /* create one ACE to hold the mode embedded in reserved special SID */ + pace = (struct cifs_ace *)(sizeof(struct crt_sd_ctxt) + (char *)buf); + acelen = setup_special_mode_ACE(pace, (__u64)mode); + /* and one more ACE to allow access for authenticated users */ + pace = (struct cifs_ace *)(acelen + (sizeof(struct crt_sd_ctxt) + + (char *)buf)); + acelen += setup_authusers_ACE(pace); + buf->acl.AclSize = cpu_to_le16(sizeof(struct cifs_acl) + acelen); + buf->acl.AceCount = cpu_to_le16(2); + return buf; +} + +static int +add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) +{ + struct smb2_create_req *req = iov[0].iov_base; + unsigned int num = *num_iovec; + unsigned int len = 0; + + iov[num].iov_base = create_sd_buf(mode, &len); + if (iov[num].iov_base == NULL) + return -ENOMEM; + iov[num].iov_len = len; + if (!req->CreateContextsOffset) + req->CreateContextsOffset = cpu_to_le32( + sizeof(struct smb2_create_req) + + iov[num - 1].iov_len); + le32_add_cpu(&req->CreateContextsLength, len); + *num_iovec = num + 1; + return 0; +} + static struct crt_query_id_ctxt * create_query_id_buf(void) { @@ -2351,6 +2495,7 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, rqst.rq_iov = iov; rqst.rq_nvec = n_iov; + /* no need to inc num_remote_opens because we close it just below */ trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); /* resource #4: response buffer */ @@ -2415,6 +2560,7 @@ SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock, /* File attributes ignored on open (used in create though) */ req->FileAttributes = cpu_to_le32(file_attributes); req->ShareAccess = FILE_SHARE_ALL_LE; + req->CreateDisposition = cpu_to_le32(oparms->disposition); req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); @@ -2458,7 +2604,7 @@ SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock, iov[1].iov_len = uni_path_len; iov[1].iov_base = path; - if (!server->oplocks) + if ((!server->oplocks) || (tcon->no_lease)) *oplock = SMB2_OPLOCK_LEVEL_NONE; if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || @@ -2516,6 +2662,23 @@ SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, __u8 *oplock, return rc; } + if ((oparms->disposition != FILE_OPEN) && + (oparms->cifs_sb) && + (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && + (oparms->mode != ACL_NO_MODE)) { + if (n_iov > 2) { + struct create_context *ccontext = + (struct create_context *)iov[n_iov-1].iov_base; + ccontext->Next = + cpu_to_le32(iov[n_iov-1].iov_len); + } + + cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); + rc = add_sd_context(iov, &n_iov, oparms->mode); + if (rc) + return rc; + } + if (n_iov > 2) { struct create_context *ccontext = (struct create_context *)iov[n_iov-1].iov_base; @@ -2594,6 +2757,11 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, } trace_smb3_open_err(xid, tcon->tid, ses->Suid, oparms->create_options, oparms->desired_access, rc); + if (rc == -EREMCHG) { + printk_once(KERN_WARNING "server share %s deleted\n", + tcon->treeName); + tcon->need_reconnect = true; + } goto creat_exit; } else trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, @@ -2637,7 +2805,7 @@ SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, int rc; char *in_data_buf; - rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len); + rc = smb2_ioctl_req_init(opcode, tcon, (void **) &req, &total_len); if (rc) return rc; @@ -2742,6 +2910,7 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, int resp_buftype = CIFS_NO_BUFFER; int rc = 0; int flags = 0; + struct TCP_Server_Info *server; cifs_dbg(FYI, "SMB2 IOCTL\n"); @@ -2757,7 +2926,10 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, else return -EIO; - if (!ses || !(ses->server)) + if (!ses) + return -EIO; + server = ses->server; + if (!server) return -EIO; if (smb3_encryption_required(tcon)) @@ -2807,14 +2979,14 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, if (*plen == 0) goto ioctl_exit; /* server returned no data */ else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { - cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); + cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); *plen = 0; rc = -EIO; goto ioctl_exit; } if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { - cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, + cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, le32_to_cpu(rsp->OutputOffset)); *plen = 0; rc = -EIO; @@ -2862,7 +3034,7 @@ SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, int SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, - u64 persistent_fid, u64 volatile_fid) + u64 persistent_fid, u64 volatile_fid, bool query_attrs) { struct smb2_close_req *req; struct kvec *iov = rqst->rq_iov; @@ -2875,6 +3047,10 @@ SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, req->PersistentFileId = persistent_fid; req->VolatileFileId = volatile_fid; + if (query_attrs) + req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; + else + req->Flags = 0; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; @@ -2889,8 +3065,9 @@ SMB2_close_free(struct smb_rqst *rqst) } int -SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid, int flags) +__SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_network_open_info *pbuf) { struct smb_rqst rqst; struct smb2_close_rsp *rsp = NULL; @@ -2899,6 +3076,8 @@ SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon, struct kvec rsp_iov; int resp_buftype = CIFS_NO_BUFFER; int rc = 0; + int flags = 0; + bool query_attrs = false; cifs_dbg(FYI, "Close\n"); @@ -2913,7 +3092,13 @@ SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon, rqst.rq_iov = iov; rqst.rq_nvec = 1; - rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid); + /* check if need to ask server to return timestamps in close response */ + if (pbuf) + query_attrs = true; + + trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); + rc = SMB2_close_init(tcon, &rqst, persistent_fid, volatile_fid, + query_attrs); if (rc) goto close_exit; @@ -2925,23 +3110,40 @@ SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon, trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, rc); goto close_exit; + } else { + trace_smb3_close_done(xid, persistent_fid, tcon->tid, + ses->Suid); + /* + * Note that have to subtract 4 since struct network_open_info + * has a final 4 byte pad that close response does not have + */ + if (pbuf) + memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); } atomic_dec(&tcon->num_remote_opens); - - /* BB FIXME - decode close response, update inode for caching */ - close_exit: SMB2_close_free(&rqst); free_rsp_buf(resp_buftype, rsp); + + /* retry close in a worker thread if this one is interrupted */ + if (rc == -EINTR) { + int tmp_rc; + + tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, + volatile_fid); + if (tmp_rc) + cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", + persistent_fid, tmp_rc); + } return rc; } int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid) + u64 persistent_fid, u64 volatile_fid) { - return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0); + return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); } int @@ -3055,12 +3257,16 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon, int rc = 0; int resp_buftype = CIFS_NO_BUFFER; struct cifs_ses *ses = tcon->ses; + struct TCP_Server_Info *server; int flags = 0; bool allocated = false; cifs_dbg(FYI, "Query Info\n"); - if (!ses || !(ses->server)) + if (!ses) + return -EIO; + server = ses->server; + if (!server) return -EIO; if (smb3_encryption_required(tcon)) @@ -3098,7 +3304,7 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon, if (!*data) { *data = kmalloc(*dlen, GFP_KERNEL); if (!*data) { - cifs_dbg(VFS, + cifs_tcon_dbg(VFS, "Error %d allocating memory for acl\n", rc); *dlen = 0; @@ -3159,6 +3365,93 @@ SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, } /* + * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory + * See MS-SMB2 2.2.35 and 2.2.36 + */ + +static int +SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, + struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, + u32 completion_filter, bool watch_tree) +{ + struct smb2_change_notify_req *req; + struct kvec *iov = rqst->rq_iov; + unsigned int total_len; + int rc; + + rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, (void **) &req, &total_len); + if (rc) + return rc; + + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + /* See note 354 of MS-SMB2, 64K max */ + req->OutputBufferLength = + cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); + req->CompletionFilter = cpu_to_le32(completion_filter); + if (watch_tree) + req->Flags = cpu_to_le16(SMB2_WATCH_TREE); + else + req->Flags = 0; + + iov[0].iov_base = (char *)req; + iov[0].iov_len = total_len; + + return 0; +} + +int +SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, bool watch_tree, + u32 completion_filter) +{ + struct cifs_ses *ses = tcon->ses; + struct smb_rqst rqst; + struct kvec iov[1]; + struct kvec rsp_iov = {NULL, 0}; + int resp_buftype = CIFS_NO_BUFFER; + int flags = 0; + int rc = 0; + + cifs_dbg(FYI, "change notify\n"); + if (!ses || !(ses->server)) + return -EIO; + + if (smb3_encryption_required(tcon)) + flags |= CIFS_TRANSFORM_REQ; + + memset(&rqst, 0, sizeof(struct smb_rqst)); + memset(&iov, 0, sizeof(iov)); + rqst.rq_iov = iov; + rqst.rq_nvec = 1; + + rc = SMB2_notify_init(xid, &rqst, tcon, persistent_fid, volatile_fid, + completion_filter, watch_tree); + if (rc) + goto cnotify_exit; + + trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, + (u8)watch_tree, completion_filter); + rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); + + if (rc != 0) { + cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); + trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, + (u8)watch_tree, completion_filter, rc); + } else + trace_smb3_notify_done(xid, persistent_fid, tcon->tid, + ses->Suid, (u8)watch_tree, completion_filter); + + cnotify_exit: + if (rqst.rq_iov) + cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ + free_rsp_buf(resp_buftype, rsp_iov.iov_base); + return rc; +} + + + +/* * This is a no-op for now. We're not really interested in the reply, but * rather in the fact that the server sent one and that server->lstrp * gets updated. @@ -3287,51 +3580,76 @@ SMB2_echo(struct TCP_Server_Info *server) return rc; } +void +SMB2_flush_free(struct smb_rqst *rqst) +{ + if (rqst && rqst->rq_iov) + cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ +} + int -SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, - u64 volatile_fid) +SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, + struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid) { - struct smb_rqst rqst; struct smb2_flush_req *req; - struct cifs_ses *ses = tcon->ses; - struct kvec iov[1]; - struct kvec rsp_iov; - int resp_buftype; - int rc = 0; - int flags = 0; + struct kvec *iov = rqst->rq_iov; unsigned int total_len; - - cifs_dbg(FYI, "Flush\n"); - - if (!ses || !(ses->server)) - return -EIO; + int rc; rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len); if (rc) return rc; - if (smb3_encryption_required(tcon)) - flags |= CIFS_TRANSFORM_REQ; - req->PersistentFileId = persistent_fid; req->VolatileFileId = volatile_fid; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; + return 0; +} + +int +SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, + u64 volatile_fid) +{ + struct cifs_ses *ses = tcon->ses; + struct smb_rqst rqst; + struct kvec iov[1]; + struct kvec rsp_iov = {NULL, 0}; + int resp_buftype = CIFS_NO_BUFFER; + int flags = 0; + int rc = 0; + + cifs_dbg(FYI, "flush\n"); + if (!ses || !(ses->server)) + return -EIO; + + if (smb3_encryption_required(tcon)) + flags |= CIFS_TRANSFORM_REQ; + memset(&rqst, 0, sizeof(struct smb_rqst)); + memset(&iov, 0, sizeof(iov)); rqst.rq_iov = iov; rqst.rq_nvec = 1; + rc = SMB2_flush_init(xid, &rqst, tcon, persistent_fid, volatile_fid); + if (rc) + goto flush_exit; + + trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); - cifs_small_buf_release(req); if (rc != 0) { cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, rc); - } + } else + trace_smb3_flush_done(xid, persistent_fid, tcon->tid, + ses->Suid); + flush_exit: + SMB2_flush_free(&rqst); free_rsp_buf(resp_buftype, rsp_iov.iov_base); return rc; } @@ -3446,8 +3764,8 @@ smb2_readv_callback(struct mid_q_entry *mid) struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)rdata->iov[0].iov_base; struct cifs_credits credits = { .value = 0, .instance = 0 }; - struct smb_rqst rqst = { .rq_iov = rdata->iov, - .rq_nvec = 2, + struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], + .rq_nvec = 1, .rq_pages = rdata->pages, .rq_offset = rdata->page_offset, .rq_npages = rdata->nr_pages, @@ -3468,7 +3786,7 @@ smb2_readv_callback(struct mid_q_entry *mid) rc = smb2_verify_signature(&rqst, server); if (rc) - cifs_dbg(VFS, "SMB signature verification returned error = %d\n", + cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", rc); } /* FIXME: should this be counted toward the initiating task? */ @@ -3595,7 +3913,7 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, unsigned int *nbytes, char **buf, int *buf_type) { struct smb_rqst rqst; - int resp_buftype, rc = -EACCES; + int resp_buftype, rc; struct smb2_read_plain_req *req = NULL; struct smb2_read_rsp *rsp = NULL; struct kvec iov[1]; @@ -3734,6 +4052,9 @@ smb2_writev_callback(struct mid_q_entry *mid) wdata->cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes, wdata->result); + if (wdata->result == -ENOSPC) + printk_once(KERN_WARNING "Out of space writing to %s\n", + tcon->treeName); } else trace_smb3_write_done(0 /* no xid */, wdata->cfile->fid.persistent_fid, @@ -4012,56 +4333,38 @@ num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) /* * Readdir/FindFirst */ -int -SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid, int index, - struct cifs_search_info *srch_inf) +int SMB2_query_directory_init(const unsigned int xid, + struct cifs_tcon *tcon, struct smb_rqst *rqst, + u64 persistent_fid, u64 volatile_fid, + int index, int info_level) { - struct smb_rqst rqst; + struct TCP_Server_Info *server = tcon->ses->server; struct smb2_query_directory_req *req; - struct smb2_query_directory_rsp *rsp = NULL; - struct kvec iov[2]; - struct kvec rsp_iov; - int rc = 0; - int len; - int resp_buftype = CIFS_NO_BUFFER; unsigned char *bufptr; - struct TCP_Server_Info *server; - struct cifs_ses *ses = tcon->ses; __le16 asteriks = cpu_to_le16('*'); - char *end_of_smb; - unsigned int output_size = CIFSMaxBufSize; - size_t info_buf_size; - int flags = 0; + unsigned int output_size = CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE; unsigned int total_len; - - if (ses && (ses->server)) - server = ses->server; - else - return -EIO; + struct kvec *iov = rqst->rq_iov; + int len, rc; rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req, &total_len); if (rc) return rc; - if (smb3_encryption_required(tcon)) - flags |= CIFS_TRANSFORM_REQ; - - switch (srch_inf->info_level) { + switch (info_level) { case SMB_FIND_FILE_DIRECTORY_INFO: req->FileInformationClass = FILE_DIRECTORY_INFORMATION; - info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; break; case SMB_FIND_FILE_ID_FULL_DIR_INFO: req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; - info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; break; default: - cifs_dbg(VFS, "info level %u isn't supported\n", - srch_inf->info_level); - rc = -EINVAL; - goto qdir_exit; + cifs_tcon_dbg(VFS, "info level %u isn't supported\n", + info_level); + return -EINVAL; } req->FileIndex = cpu_to_le32(index); @@ -4090,40 +4393,50 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, iov[1].iov_base = (char *)(req->Buffer); iov[1].iov_len = len; - memset(&rqst, 0, sizeof(struct smb_rqst)); - rqst.rq_iov = iov; - rqst.rq_nvec = 2; - trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, tcon->ses->Suid, index, output_size); - rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); - cifs_small_buf_release(req); - rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; + return 0; +} - if (rc) { - if (rc == -ENODATA && - rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) { - trace_smb3_query_dir_done(xid, persistent_fid, - tcon->tid, tcon->ses->Suid, index, 0); - srch_inf->endOfSearch = true; - rc = 0; - } else { - trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, - tcon->ses->Suid, index, 0, rc); - cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); - } - goto qdir_exit; +void SMB2_query_directory_free(struct smb_rqst *rqst) +{ + if (rqst && rqst->rq_iov) { + cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ + } +} + +int +smb2_parse_query_directory(struct cifs_tcon *tcon, + struct kvec *rsp_iov, + int resp_buftype, + struct cifs_search_info *srch_inf) +{ + struct smb2_query_directory_rsp *rsp; + size_t info_buf_size; + char *end_of_smb; + int rc; + + rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; + + switch (srch_inf->info_level) { + case SMB_FIND_FILE_DIRECTORY_INFO: + info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; + break; + case SMB_FIND_FILE_ID_FULL_DIR_INFO: + info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; + break; + default: + cifs_tcon_dbg(VFS, "info level %u isn't supported\n", + srch_inf->info_level); + return -EINVAL; } rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), - le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, + le32_to_cpu(rsp->OutputBufferLength), rsp_iov, info_buf_size); - if (rc) { - trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, - tcon->ses->Suid, index, 0, rc); - goto qdir_exit; - } + if (rc) + return rc; srch_inf->unicode = true; @@ -4136,7 +4449,7 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, srch_inf->ntwrk_buf_start = (char *)rsp; srch_inf->srch_entries_start = srch_inf->last_entry = (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); - end_of_smb = rsp_iov.iov_len + (char *)rsp; + end_of_smb = rsp_iov->iov_len + (char *)rsp; srch_inf->entries_in_buffer = num_entries(srch_inf->srch_entries_start, end_of_smb, &srch_inf->last_entry, info_buf_size); @@ -4149,13 +4462,74 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, else if (resp_buftype == CIFS_SMALL_BUFFER) srch_inf->smallBuf = true; else - cifs_dbg(VFS, "illegal search buffer type\n"); + cifs_tcon_dbg(VFS, "illegal search buffer type\n"); + + return 0; +} + +int +SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, int index, + struct cifs_search_info *srch_inf) +{ + struct smb_rqst rqst; + struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; + struct smb2_query_directory_rsp *rsp = NULL; + int resp_buftype = CIFS_NO_BUFFER; + struct kvec rsp_iov; + int rc = 0; + struct cifs_ses *ses = tcon->ses; + int flags = 0; + + if (!ses || !(ses->server)) + return -EIO; + + if (smb3_encryption_required(tcon)) + flags |= CIFS_TRANSFORM_REQ; + + memset(&rqst, 0, sizeof(struct smb_rqst)); + memset(&iov, 0, sizeof(iov)); + rqst.rq_iov = iov; + rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; + + rc = SMB2_query_directory_init(xid, tcon, &rqst, persistent_fid, + volatile_fid, index, + srch_inf->info_level); + if (rc) + goto qdir_exit; + + rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov); + rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; + + if (rc) { + if (rc == -ENODATA && + rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) { + trace_smb3_query_dir_done(xid, persistent_fid, + tcon->tid, tcon->ses->Suid, index, 0); + srch_inf->endOfSearch = true; + rc = 0; + } else { + trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, + tcon->ses->Suid, index, 0, rc); + cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); + } + goto qdir_exit; + } + + rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, + srch_inf); + if (rc) { + trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, + tcon->ses->Suid, index, 0, rc); + goto qdir_exit; + } + resp_buftype = CIFS_NO_BUFFER; trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, tcon->ses->Suid, index, srch_inf->entries_in_buffer); - return rc; qdir_exit: + SMB2_query_directory_free(&rqst); free_rsp_buf(resp_buftype, rsp); return rc; } diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 747de9317659..fa03df130f1a 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -25,6 +25,7 @@ #define _SMB2PDU_H #include <net/sock.h> +#include <cifsacl.h> /* * Note that, due to trying to use names similar to the protocol specifications, @@ -143,7 +144,9 @@ struct smb2_transform_hdr { #define SMB2_FLAGS_ASYNC_COMMAND cpu_to_le32(0x00000002) #define SMB2_FLAGS_RELATED_OPERATIONS cpu_to_le32(0x00000004) #define SMB2_FLAGS_SIGNED cpu_to_le32(0x00000008) +#define SMB2_FLAGS_PRIORITY_MASK cpu_to_le32(0x00000070) /* SMB3.1.1 */ #define SMB2_FLAGS_DFS_OPERATIONS cpu_to_le32(0x10000000) +#define SMB2_FLAGS_REPLAY_OPERATION cpu_to_le32(0x20000000) /* SMB3 & up */ /* * Definitions for SMB2 Protocol Data Units (network frames) @@ -836,6 +839,7 @@ struct create_durable_handle_reconnect_v2 { struct create_context ccontext; __u8 Name[8]; struct durable_reconnect_context_v2 dcontext; + __u8 Pad[4]; } __packed; /* See MS-SMB2 2.2.13.2.5 */ @@ -852,6 +856,15 @@ struct crt_query_id_ctxt { __u8 Name[8]; } __packed; +struct crt_sd_ctxt { + struct create_context ccontext; + __u8 Name[8]; + struct smb3_sd sd; + struct smb3_acl acl; + /* Followed by at least 4 ACEs */ +} __packed; + + #define COPY_CHUNK_RES_KEY_SIZE 24 struct resume_key_req { char ResumeKey[COPY_CHUNK_RES_KEY_SIZE]; @@ -1269,6 +1282,8 @@ struct smb2_echo_rsp { #define SMB2_INDEX_SPECIFIED 0x04 #define SMB2_REOPEN 0x10 +#define SMB2_QUERY_DIRECTORY_IOV_SIZE 2 + struct smb2_query_directory_req { struct smb2_sync_hdr sync_hdr; __le16 StructureSize; /* Must be 33 */ @@ -1383,7 +1398,7 @@ struct smb2_oplock_break { struct smb2_lease_break { struct smb2_sync_hdr sync_hdr; __le16 StructureSize; /* Must be 44 */ - __le16 Reserved; + __le16 Epoch; __le32 Flags; __u8 LeaseKey[16]; __le32 CurrentLeaseState; @@ -1504,6 +1519,7 @@ struct smb3_fs_vol_info { #define FILE_NORMALIZED_NAME_INFORMATION 48 #define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50 #define FILE_STANDARD_LINK_INFORMATION 54 +#define FILE_ID_INFORMATION 59 struct smb2_file_internal_info { __le64 IndexNumber; @@ -1567,6 +1583,32 @@ struct smb2_file_eof_info { /* encoding of request for level 10 */ __le64 EndOfFile; /* new end of file value */ } __packed; /* level 20 Set */ +struct smb2_file_network_open_info { + __le64 CreationTime; + __le64 LastAccessTime; + __le64 LastWriteTime; + __le64 ChangeTime; + __le64 AllocationSize; + __le64 EndOfFile; + __le32 Attributes; + __le32 Reserved; +} __packed; /* level 34 Query also similar returned in close rsp and open rsp */ + +/* See MS-FSCC 2.4.43 */ +struct smb2_file_id_information { + __le64 VolumeSerialNumber; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ +} __packed; /* level 59 */ + extern char smb2_padding[7]; +/* equivalent of the contents of SMB3.1.1 POSIX open context response */ +struct smb_posix_info { + __le32 nlink; + __le32 reparse_tag; + __le32 mode; + kuid_t uid; + kuid_t gid; +}; #endif /* _SMB2PDU_H */ diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 07ca72486cfa..de6388ef344f 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -46,7 +46,8 @@ extern int smb2_verify_signature(struct smb_rqst *, struct TCP_Server_Info *); extern int smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, bool log_error); extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses, - struct smb_rqst *rqst); + struct TCP_Server_Info *, + struct smb_rqst *rqst); extern struct mid_q_entry *smb2_setup_async_request( struct TCP_Server_Info *server, struct smb_rqst *rqst); extern struct cifs_ses *smb2_find_smb_ses(struct TCP_Server_Info *server, @@ -67,8 +68,10 @@ extern int smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid); extern int open_shroot(unsigned int xid, struct cifs_tcon *tcon, - struct cifs_fid *pfid); + struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid); extern void close_shroot(struct cached_fid *cfid); +extern void close_shroot_lease(struct cached_fid *cfid); +extern void close_shroot_lease_locked(struct cached_fid *cfid); extern void move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src); extern int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, @@ -84,7 +87,8 @@ extern int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, umode_t mode, struct cifs_tcon *tcon, const char *full_path, struct cifs_sb_info *cifs_sb); -extern int smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, +extern int smb2_mkdir(const unsigned int xid, struct inode *inode, + umode_t mode, struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb); extern void smb2_mkdir_setinfo(struct inode *inode, const char *full_path, struct cifs_sb_info *cifs_sb, @@ -149,15 +153,24 @@ extern int SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, bool is_fsctl, char *in_data, u32 indatalen, __u32 max_response_size); extern void SMB2_ioctl_free(struct smb_rqst *rqst); +extern int SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, bool watch_tree, + u32 completion_filter); + +extern int __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_network_open_info *pbuf); extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id); -extern int SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid, int flags); extern int SMB2_close_init(struct cifs_tcon *tcon, struct smb_rqst *rqst, - u64 persistent_file_id, u64 volatile_file_id); + u64 persistent_fid, u64 volatile_fid, bool query_attrs); extern void SMB2_close_free(struct smb_rqst *rqst); extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id); +extern int SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, + struct cifs_tcon *tcon, + u64 persistent_file_id, u64 volatile_file_id); +extern void SMB2_flush_free(struct smb_rqst *rqst); extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id, struct smb2_file_all_info *data); @@ -184,6 +197,11 @@ extern int SMB2_echo(struct TCP_Server_Info *server); extern int SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, int index, struct cifs_search_info *srch_inf); +extern int SMB2_query_directory_init(unsigned int xid, struct cifs_tcon *tcon, + struct smb_rqst *rqst, + u64 persistent_fid, u64 volatile_fid, + int index, int info_level); +extern void SMB2_query_directory_free(struct smb_rqst *rqst); extern int SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, u32 pid, __le64 *eof); @@ -203,6 +221,9 @@ extern int SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, const u64 persistent_fid, const u64 volatile_fid, const __u8 oplock_level); +extern int smb2_handle_cancelled_close(struct cifs_tcon *tcon, + __u64 persistent_fid, + __u64 volatile_fid); extern int smb2_handle_cancelled_mid(char *buffer, struct TCP_Server_Info *server); void smb2_cancelled_close_fid(struct work_struct *work); diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c index 1ccbcf9c2c3b..08b703b7a15e 100644 --- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -98,6 +98,62 @@ err: return rc; } + +static +int smb2_get_sign_key(__u64 ses_id, struct TCP_Server_Info *server, u8 *key) +{ + struct cifs_chan *chan; + struct cifs_ses *ses = NULL; + struct TCP_Server_Info *it = NULL; + int i; + int rc = 0; + + spin_lock(&cifs_tcp_ses_lock); + + list_for_each_entry(it, &cifs_tcp_ses_list, tcp_ses_list) { + list_for_each_entry(ses, &it->smb_ses_list, smb_ses_list) { + if (ses->Suid == ses_id) + goto found; + } + } + cifs_server_dbg(VFS, "%s: Could not find session 0x%llx\n", + __func__, ses_id); + rc = -ENOENT; + goto out; + +found: + if (ses->binding) { + /* + * If we are in the process of binding a new channel + * to an existing session, use the master connection + * session key + */ + memcpy(key, ses->smb3signingkey, SMB3_SIGN_KEY_SIZE); + goto out; + } + + /* + * Otherwise, use the channel key. + */ + + for (i = 0; i < ses->chan_count; i++) { + chan = ses->chans + i; + if (chan->server == server) { + memcpy(key, chan->signkey, SMB3_SIGN_KEY_SIZE); + goto out; + } + } + + cifs_dbg(VFS, + "%s: Could not find channel signing key for session 0x%llx\n", + __func__, ses_id); + rc = -ENOENT; + +out: + spin_unlock(&cifs_tcp_ses_lock); + return rc; +} + static struct cifs_ses * smb2_find_smb_ses_unlocked(struct TCP_Server_Info *server, __u64 ses_id) { @@ -176,7 +232,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) ses = smb2_find_smb_ses(server, shdr->SessionId); if (!ses) { - cifs_dbg(VFS, "%s: Could not find session\n", __func__); + cifs_server_dbg(VFS, "%s: Could not find session\n", __func__); return 0; } @@ -185,21 +241,21 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) rc = smb2_crypto_shash_allocate(server); if (rc) { - cifs_dbg(VFS, "%s: sha256 alloc failed\n", __func__); + cifs_server_dbg(VFS, "%s: sha256 alloc failed\n", __func__); return rc; } rc = crypto_shash_setkey(server->secmech.hmacsha256, ses->auth_key.response, SMB2_NTLMV2_SESSKEY_SIZE); if (rc) { - cifs_dbg(VFS, "%s: Could not update with response\n", __func__); + cifs_server_dbg(VFS, "%s: Could not update with response\n", __func__); return rc; } shash = &server->secmech.sdeschmacsha256->shash; rc = crypto_shash_init(shash); if (rc) { - cifs_dbg(VFS, "%s: Could not init sha256", __func__); + cifs_server_dbg(VFS, "%s: Could not init sha256", __func__); return rc; } @@ -215,7 +271,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) rc = crypto_shash_update(shash, iov[0].iov_base, iov[0].iov_len); if (rc) { - cifs_dbg(VFS, "%s: Could not update with payload\n", + cifs_server_dbg(VFS, "%s: Could not update with payload\n", __func__); return rc; } @@ -239,68 +295,69 @@ static int generate_key(struct cifs_ses *ses, struct kvec label, int rc = 0; unsigned char prfhash[SMB2_HMACSHA256_SIZE]; unsigned char *hashptr = prfhash; + struct TCP_Server_Info *server = ses->server; memset(prfhash, 0x0, SMB2_HMACSHA256_SIZE); memset(key, 0x0, key_size); - rc = smb3_crypto_shash_allocate(ses->server); + rc = smb3_crypto_shash_allocate(server); if (rc) { - cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__); + cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_setkey(ses->server->secmech.hmacsha256, + rc = crypto_shash_setkey(server->secmech.hmacsha256, ses->auth_key.response, SMB2_NTLMV2_SESSKEY_SIZE); if (rc) { - cifs_dbg(VFS, "%s: Could not set with session key\n", __func__); + cifs_server_dbg(VFS, "%s: Could not set with session key\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_init(&ses->server->secmech.sdeschmacsha256->shash); + rc = crypto_shash_init(&server->secmech.sdeschmacsha256->shash); if (rc) { - cifs_dbg(VFS, "%s: Could not init sign hmac\n", __func__); + cifs_server_dbg(VFS, "%s: Could not init sign hmac\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_update(&ses->server->secmech.sdeschmacsha256->shash, + rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash, i, 4); if (rc) { - cifs_dbg(VFS, "%s: Could not update with n\n", __func__); + cifs_server_dbg(VFS, "%s: Could not update with n\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_update(&ses->server->secmech.sdeschmacsha256->shash, + rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash, label.iov_base, label.iov_len); if (rc) { - cifs_dbg(VFS, "%s: Could not update with label\n", __func__); + cifs_server_dbg(VFS, "%s: Could not update with label\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_update(&ses->server->secmech.sdeschmacsha256->shash, + rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash, &zero, 1); if (rc) { - cifs_dbg(VFS, "%s: Could not update with zero\n", __func__); + cifs_server_dbg(VFS, "%s: Could not update with zero\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_update(&ses->server->secmech.sdeschmacsha256->shash, + rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash, context.iov_base, context.iov_len); if (rc) { - cifs_dbg(VFS, "%s: Could not update with context\n", __func__); + cifs_server_dbg(VFS, "%s: Could not update with context\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_update(&ses->server->secmech.sdeschmacsha256->shash, + rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash, L, 4); if (rc) { - cifs_dbg(VFS, "%s: Could not update with L\n", __func__); + cifs_server_dbg(VFS, "%s: Could not update with L\n", __func__); goto smb3signkey_ret; } - rc = crypto_shash_final(&ses->server->secmech.sdeschmacsha256->shash, + rc = crypto_shash_final(&server->secmech.sdeschmacsha256->shash, hashptr); if (rc) { - cifs_dbg(VFS, "%s: Could not generate sha256 hash\n", __func__); + cifs_server_dbg(VFS, "%s: Could not generate sha256 hash\n", __func__); goto smb3signkey_ret; } @@ -327,21 +384,45 @@ generate_smb3signingkey(struct cifs_ses *ses, { int rc; - rc = generate_key(ses, ptriplet->signing.label, - ptriplet->signing.context, ses->smb3signingkey, - SMB3_SIGN_KEY_SIZE); - if (rc) - return rc; + /* + * All channels use the same encryption/decryption keys but + * they have their own signing key. + * + * When we generate the keys, check if it is for a new channel + * (binding) in which case we only need to generate a signing + * key and store it in the channel as to not overwrite the + * master connection signing key stored in the session + */ - rc = generate_key(ses, ptriplet->encryption.label, - ptriplet->encryption.context, ses->smb3encryptionkey, - SMB3_SIGN_KEY_SIZE); - if (rc) - return rc; + if (ses->binding) { + rc = generate_key(ses, ptriplet->signing.label, + ptriplet->signing.context, + cifs_ses_binding_channel(ses)->signkey, + SMB3_SIGN_KEY_SIZE); + if (rc) + return rc; + } else { + rc = generate_key(ses, ptriplet->signing.label, + ptriplet->signing.context, + ses->smb3signingkey, + SMB3_SIGN_KEY_SIZE); + if (rc) + return rc; - rc = generate_key(ses, ptriplet->decryption.label, - ptriplet->decryption.context, - ses->smb3decryptionkey, SMB3_SIGN_KEY_SIZE); + memcpy(ses->chans[0].signkey, ses->smb3signingkey, + SMB3_SIGN_KEY_SIZE); + + rc = generate_key(ses, ptriplet->encryption.label, + ptriplet->encryption.context, + ses->smb3encryptionkey, + SMB3_SIGN_KEY_SIZE); + rc = generate_key(ses, ptriplet->decryption.label, + ptriplet->decryption.context, + ses->smb3decryptionkey, + SMB3_SIGN_KEY_SIZE); + if (rc) + return rc; + } if (rc) return rc; @@ -430,23 +511,21 @@ smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) unsigned char *sigptr = smb3_signature; struct kvec *iov = rqst->rq_iov; struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)iov[0].iov_base; - struct cifs_ses *ses; struct shash_desc *shash = &server->secmech.sdesccmacaes->shash; struct smb_rqst drqst; + u8 key[SMB3_SIGN_KEY_SIZE]; - ses = smb2_find_smb_ses(server, shdr->SessionId); - if (!ses) { - cifs_dbg(VFS, "%s: Could not find session\n", __func__); + rc = smb2_get_sign_key(shdr->SessionId, server, key); + if (rc) return 0; - } memset(smb3_signature, 0x0, SMB2_CMACAES_SIZE); memset(shdr->Signature, 0x0, SMB2_SIGNATURE_SIZE); rc = crypto_shash_setkey(server->secmech.cmacaes, - ses->smb3signingkey, SMB2_CMACAES_SIZE); + key, SMB2_CMACAES_SIZE); if (rc) { - cifs_dbg(VFS, "%s: Could not set key for cmac aes\n", __func__); + cifs_server_dbg(VFS, "%s: Could not set key for cmac aes\n", __func__); return rc; } @@ -457,7 +536,7 @@ smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) */ rc = crypto_shash_init(shash); if (rc) { - cifs_dbg(VFS, "%s: Could not init cmac aes\n", __func__); + cifs_server_dbg(VFS, "%s: Could not init cmac aes\n", __func__); return rc; } @@ -473,7 +552,7 @@ smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) rc = crypto_shash_update(shash, iov[0].iov_base, iov[0].iov_len); if (rc) { - cifs_dbg(VFS, "%s: Could not update with payload\n", + cifs_server_dbg(VFS, "%s: Could not update with payload\n", __func__); return rc; } @@ -493,16 +572,25 @@ static int smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server) { int rc = 0; - struct smb2_sync_hdr *shdr = - (struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base; + struct smb2_sync_hdr *shdr; + struct smb2_sess_setup_req *ssr; + bool is_binding; + bool is_signed; - if (!(shdr->Flags & SMB2_FLAGS_SIGNED) || - server->tcpStatus == CifsNeedNegotiate) - return rc; + shdr = (struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base; + ssr = (struct smb2_sess_setup_req *)shdr; + + is_binding = shdr->Command == SMB2_SESSION_SETUP && + (ssr->Flags & SMB2_SESSION_REQ_FLAG_BINDING); + is_signed = shdr->Flags & SMB2_FLAGS_SIGNED; - if (!server->session_estab) { + if (!is_signed) + return 0; + if (server->tcpStatus == CifsNeedNegotiate) + return 0; + if (!is_binding && !server->session_estab) { strncpy(shdr->Signature, "BSRSPYL", 8); - return rc; + return 0; } rc = server->ops->calc_signature(rqst, server); @@ -521,6 +609,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) if ((shdr->Command == SMB2_NEGOTIATE) || (shdr->Command == SMB2_SESSION_SETUP) || (shdr->Command == SMB2_OPLOCK_BREAK) || + server->ignore_signature || (!server->session_estab)) return 0; @@ -597,6 +686,8 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr, * The default is for the mid to be synchronous, so the * default callback just wakes up the current task. */ + get_task_struct(current); + temp->creator = current; temp->callback = cifs_wake_up_task; temp->callback_data = current; @@ -608,18 +699,18 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr, } static int -smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_sync_hdr *shdr, - struct mid_q_entry **mid) +smb2_get_mid_entry(struct cifs_ses *ses, struct TCP_Server_Info *server, + struct smb2_sync_hdr *shdr, struct mid_q_entry **mid) { - if (ses->server->tcpStatus == CifsExiting) + if (server->tcpStatus == CifsExiting) return -ENOENT; - if (ses->server->tcpStatus == CifsNeedReconnect) { + if (server->tcpStatus == CifsNeedReconnect) { cifs_dbg(FYI, "tcp session dead - return to caller to retry\n"); return -EAGAIN; } - if (ses->server->tcpStatus == CifsNeedNegotiate && + if (server->tcpStatus == CifsNeedNegotiate && shdr->Command != SMB2_NEGOTIATE) return -EAGAIN; @@ -636,11 +727,11 @@ smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_sync_hdr *shdr, /* else ok - we are shutting down the session */ } - *mid = smb2_mid_entry_alloc(shdr, ses->server); + *mid = smb2_mid_entry_alloc(shdr, server); if (*mid == NULL) return -ENOMEM; spin_lock(&GlobalMid_Lock); - list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q); + list_add_tail(&(*mid)->qhead, &server->pending_mid_q); spin_unlock(&GlobalMid_Lock); return 0; @@ -665,7 +756,7 @@ smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, rc = smb2_verify_signature(&rqst, server); if (rc) - cifs_dbg(VFS, "SMB signature verification returned error = %d\n", + cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n", rc); } @@ -673,24 +764,25 @@ smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, } struct mid_q_entry * -smb2_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst) +smb2_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *server, + struct smb_rqst *rqst) { int rc; struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base; struct mid_q_entry *mid; - smb2_seq_num_into_buf(ses->server, shdr); + smb2_seq_num_into_buf(server, shdr); - rc = smb2_get_mid_entry(ses, shdr, &mid); + rc = smb2_get_mid_entry(ses, server, shdr, &mid); if (rc) { - revert_current_mid_from_hdr(ses->server, shdr); + revert_current_mid_from_hdr(server, shdr); return ERR_PTR(rc); } - rc = smb2_sign_rqst(rqst, ses->server); + rc = smb2_sign_rqst(rqst, server); if (rc) { - revert_current_mid_from_hdr(ses->server, shdr); + revert_current_mid_from_hdr(server, shdr); cifs_delete_mid(mid); return ERR_PTR(rc); } @@ -739,7 +831,7 @@ smb3_crypto_aead_allocate(struct TCP_Server_Info *server) else tfm = crypto_alloc_aead("ccm(aes)", 0, 0); if (IS_ERR(tfm)) { - cifs_dbg(VFS, "%s: Failed to alloc encrypt aead\n", + cifs_server_dbg(VFS, "%s: Failed to alloc encrypt aead\n", __func__); return PTR_ERR(tfm); } @@ -754,7 +846,7 @@ smb3_crypto_aead_allocate(struct TCP_Server_Info *server) if (IS_ERR(tfm)) { crypto_free_aead(server->secmech.ccmaesencrypt); server->secmech.ccmaesencrypt = NULL; - cifs_dbg(VFS, "%s: Failed to alloc decrypt aead\n", + cifs_server_dbg(VFS, "%s: Failed to alloc decrypt aead\n", __func__); return PTR_ERR(tfm); } diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index cd07e5301d42..5b1b97e9e0c9 100644 --- a/fs/cifs/smbdirect.c +++ b/fs/cifs/smbdirect.c @@ -1069,7 +1069,7 @@ static int smbd_post_send_data( if (n_vec > SMBDIRECT_MAX_SGE) { cifs_dbg(VFS, "Can't fit data to SGL, n_vec=%d\n", n_vec); - return -ENOMEM; + return -EINVAL; } sg_init_table(sgl, n_vec); @@ -1476,6 +1476,7 @@ void smbd_destroy(struct TCP_Server_Info *server) info->transport_status = SMBD_DESTROYED; destroy_workqueue(info->workqueue); + log_rdma_event(INFO, "rdma session destroyed\n"); kfree(info); } @@ -1505,8 +1506,9 @@ create_conn: log_rdma_event(INFO, "creating rdma session\n"); server->smbd_conn = smbd_get_connection( server, (struct sockaddr *) &server->dstaddr); - log_rdma_event(INFO, "created rdma session info=%p\n", - server->smbd_conn); + + if (server->smbd_conn) + cifs_dbg(VFS, "RDMA transport re-established\n"); return server->smbd_conn ? 0 : -ENOENT; } @@ -1654,15 +1656,17 @@ static struct smbd_connection *_smbd_get_connection( info->send_cq = NULL; info->recv_cq = NULL; - info->send_cq = ib_alloc_cq(info->id->device, info, - info->send_credit_target, 0, IB_POLL_SOFTIRQ); + info->send_cq = + ib_alloc_cq_any(info->id->device, info, + info->send_credit_target, IB_POLL_SOFTIRQ); if (IS_ERR(info->send_cq)) { info->send_cq = NULL; goto alloc_cq_failed; } - info->recv_cq = ib_alloc_cq(info->id->device, info, - info->receive_credit_max, 0, IB_POLL_SOFTIRQ); + info->recv_cq = + ib_alloc_cq_any(info->id->device, info, + info->receive_credit_max, IB_POLL_SOFTIRQ); if (IS_ERR(info->recv_cq)) { info->recv_cq = NULL; goto alloc_cq_failed; @@ -1968,7 +1972,7 @@ read_rfc1002_done: if (info->transport_status != SMBD_CONNECTED) { log_read(ERR, "disconnected\n"); - return 0; + return -ECONNABORTED; } goto again; @@ -2267,12 +2271,7 @@ static void smbd_mr_recovery_work(struct work_struct *work) int rc; list_for_each_entry(smbdirect_mr, &info->mr_list, list) { - if (smbdirect_mr->state == MR_INVALIDATED) - ib_dma_unmap_sg( - info->id->device, smbdirect_mr->sgl, - smbdirect_mr->sgl_count, - smbdirect_mr->dir); - else if (smbdirect_mr->state == MR_ERROR) { + if (smbdirect_mr->state == MR_ERROR) { /* recover this MR entry */ rc = ib_dereg_mr(smbdirect_mr->mr); @@ -2600,11 +2599,20 @@ int smbd_deregister_mr(struct smbd_mr *smbdirect_mr) */ smbdirect_mr->state = MR_INVALIDATED; - /* - * Schedule the work to do MR recovery for future I/Os - * MR recovery is slow and we don't want it to block the current I/O - */ - queue_work(info->workqueue, &info->mr_recovery_work); + if (smbdirect_mr->state == MR_INVALIDATED) { + ib_dma_unmap_sg( + info->id->device, smbdirect_mr->sgl, + smbdirect_mr->sgl_count, + smbdirect_mr->dir); + smbdirect_mr->state = MR_READY; + if (atomic_inc_return(&info->mr_ready_count) == 1) + wake_up_interruptible(&info->wait_mr); + } else + /* + * Schedule the work to do MR recovery for future I/Os MR + * recovery is slow and don't want it to block current I/O + */ + queue_work(info->workqueue, &info->mr_recovery_work); done: if (atomic_dec_and_test(&info->mr_used_count)) diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c index 2b6d87bfdf8e..39a938443e3e 100644 --- a/fs/cifs/smbencrypt.c +++ b/fs/cifs/smbencrypt.c @@ -11,13 +11,14 @@ */ -#include <linux/crypto.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/fips.h> #include <linux/fs.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/random.h> +#include <crypto/des.h> #include "cifs_fs_sb.h" #include "cifs_unicode.h" #include "cifspdu.h" @@ -58,19 +59,18 @@ static int smbhash(unsigned char *out, const unsigned char *in, unsigned char *key) { unsigned char key2[8]; - struct crypto_cipher *tfm_des; + struct des_ctx ctx; str_to_key(key, key2); - tfm_des = crypto_alloc_cipher("des", 0, 0); - if (IS_ERR(tfm_des)) { - cifs_dbg(VFS, "could not allocate des crypto API\n"); - return PTR_ERR(tfm_des); + if (fips_enabled) { + cifs_dbg(VFS, "FIPS compliance enabled: DES not permitted\n"); + return -ENOENT; } - crypto_cipher_setkey(tfm_des, key2, 8); - crypto_cipher_encrypt_one(tfm_des, out, in); - crypto_free_cipher(tfm_des); + des_expand_key(&ctx, key2, DES_KEY_SIZE); + des_encrypt(&ctx, out, in); + memzero_explicit(&ctx, sizeof(ctx)); return 0; } diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h index 08628e6a42ac..1ff28529cf4b 100644 --- a/fs/cifs/smbfsctl.h +++ b/fs/cifs/smbfsctl.h @@ -144,6 +144,17 @@ #define IO_REPARSE_APPXSTREAM 0xC0000014 /* NFS symlinks, Win 8/SMB3 and later */ #define IO_REPARSE_TAG_NFS 0x80000014 +/* + * AzureFileSync - see + * https://docs.microsoft.com/en-us/azure/storage/files/storage-sync-cloud-tiering + */ +#define IO_REPARSE_TAG_AZ_FILE_SYNC 0x8000001e +/* WSL reparse tags */ +#define IO_REPARSE_TAG_LX_SYMLINK 0xA000001D +#define IO_REPARSE_TAG_AF_UNIX 0x80000023 +#define IO_REPARSE_TAG_LX_FIFO 0x80000024 +#define IO_REPARSE_TAG_LX_CHR 0x80000025 +#define IO_REPARSE_TAG_LX_BLK 0x80000026 /* fsctl flags */ /* If Flags is set to this value, the request is an FSCTL not ioctl request */ diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h index 99c4d799c24b..4cb0d5f7ce45 100644 --- a/fs/cifs/trace.h +++ b/fs/cifs/trace.h @@ -117,6 +117,41 @@ DEFINE_SMB3_RW_DONE_EVENT(falloc_done); /* * For handle based calls other than read and write, and get/set info */ +DECLARE_EVENT_CLASS(smb3_fd_class, + TP_PROTO(unsigned int xid, + __u64 fid, + __u32 tid, + __u64 sesid), + TP_ARGS(xid, fid, tid, sesid), + TP_STRUCT__entry( + __field(unsigned int, xid) + __field(__u64, fid) + __field(__u32, tid) + __field(__u64, sesid) + ), + TP_fast_assign( + __entry->xid = xid; + __entry->fid = fid; + __entry->tid = tid; + __entry->sesid = sesid; + ), + TP_printk("\txid=%u sid=0x%llx tid=0x%x fid=0x%llx", + __entry->xid, __entry->sesid, __entry->tid, __entry->fid) +) + +#define DEFINE_SMB3_FD_EVENT(name) \ +DEFINE_EVENT(smb3_fd_class, smb3_##name, \ + TP_PROTO(unsigned int xid, \ + __u64 fid, \ + __u32 tid, \ + __u64 sesid), \ + TP_ARGS(xid, fid, tid, sesid)) + +DEFINE_SMB3_FD_EVENT(flush_enter); +DEFINE_SMB3_FD_EVENT(flush_done); +DEFINE_SMB3_FD_EVENT(close_enter); +DEFINE_SMB3_FD_EVENT(close_done); + DECLARE_EVENT_CLASS(smb3_fd_err_class, TP_PROTO(unsigned int xid, __u64 fid, @@ -200,6 +235,8 @@ DEFINE_EVENT(smb3_inf_enter_class, smb3_##name, \ DEFINE_SMB3_INF_ENTER_EVENT(query_info_enter); DEFINE_SMB3_INF_ENTER_EVENT(query_info_done); +DEFINE_SMB3_INF_ENTER_EVENT(notify_enter); +DEFINE_SMB3_INF_ENTER_EVENT(notify_done); DECLARE_EVENT_CLASS(smb3_inf_err_class, TP_PROTO(unsigned int xid, @@ -246,6 +283,7 @@ DEFINE_EVENT(smb3_inf_err_class, smb3_##name, \ DEFINE_SMB3_INF_ERR_EVENT(query_info_err); DEFINE_SMB3_INF_ERR_EVENT(set_info_err); +DEFINE_SMB3_INF_ERR_EVENT(notify_err); DEFINE_SMB3_INF_ERR_EVENT(fsctl_err); DECLARE_EVENT_CLASS(smb3_inf_compound_enter_class, @@ -509,6 +547,33 @@ DEFINE_EVENT(smb3_exit_err_class, smb3_##name, \ DEFINE_SMB3_EXIT_ERR_EVENT(exit_err); + +DECLARE_EVENT_CLASS(smb3_sync_err_class, + TP_PROTO(unsigned long ino, + int rc), + TP_ARGS(ino, rc), + TP_STRUCT__entry( + __field(unsigned long, ino) + __field(int, rc) + ), + TP_fast_assign( + __entry->ino = ino; + __entry->rc = rc; + ), + TP_printk("\tino=%lu rc=%d", + __entry->ino, __entry->rc) +) + +#define DEFINE_SMB3_SYNC_ERR_EVENT(name) \ +DEFINE_EVENT(smb3_sync_err_class, cifs_##name, \ + TP_PROTO(unsigned long ino, \ + int rc), \ + TP_ARGS(ino, rc)) + +DEFINE_SMB3_SYNC_ERR_EVENT(fsync_err); +DEFINE_SMB3_SYNC_ERR_EVENT(flush_err); + + DECLARE_EVENT_CLASS(smb3_enter_exit_class, TP_PROTO(unsigned int xid, const char *func_name), diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 5d6d44bfe10a..cb3ee916f527 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -76,6 +76,8 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server) * The default is for the mid to be synchronous, so the * default callback just wakes up the current task. */ + get_task_struct(current); + temp->creator = current; temp->callback = cifs_wake_up_task; temp->callback_data = current; @@ -86,29 +88,21 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server) static void _cifs_mid_q_entry_release(struct kref *refcount) { - struct mid_q_entry *mid = container_of(refcount, struct mid_q_entry, - refcount); - - mempool_free(mid, cifs_mid_poolp); -} - -void cifs_mid_q_entry_release(struct mid_q_entry *midEntry) -{ - spin_lock(&GlobalMid_Lock); - kref_put(&midEntry->refcount, _cifs_mid_q_entry_release); - spin_unlock(&GlobalMid_Lock); -} - -void -DeleteMidQEntry(struct mid_q_entry *midEntry) -{ + struct mid_q_entry *midEntry = + container_of(refcount, struct mid_q_entry, refcount); #ifdef CONFIG_CIFS_STATS2 __le16 command = midEntry->server->vals->lock_cmd; __u16 smb_cmd = le16_to_cpu(midEntry->command); unsigned long now; unsigned long roundtrip_time; - struct TCP_Server_Info *server = midEntry->server; #endif + struct TCP_Server_Info *server = midEntry->server; + + if (midEntry->resp_buf && (midEntry->mid_flags & MID_WAIT_CANCELLED) && + midEntry->mid_state == MID_RESPONSE_RECEIVED && + server->ops->handle_cancelled_mid) + server->ops->handle_cancelled_mid(midEntry->resp_buf, server); + midEntry->mid_state = MID_FREE; atomic_dec(&midCount); if (midEntry->large_buf) @@ -118,7 +112,7 @@ DeleteMidQEntry(struct mid_q_entry *midEntry) #ifdef CONFIG_CIFS_STATS2 now = jiffies; if (now < midEntry->when_alloc) - cifs_dbg(VFS, "invalid mid allocation time\n"); + cifs_server_dbg(VFS, "invalid mid allocation time\n"); roundtrip_time = now - midEntry->when_alloc; if (smb_cmd < NUMBER_OF_SMB2_COMMANDS) { @@ -166,6 +160,20 @@ DeleteMidQEntry(struct mid_q_entry *midEntry) } } #endif + put_task_struct(midEntry->creator); + + mempool_free(midEntry, cifs_mid_poolp); +} + +void cifs_mid_q_entry_release(struct mid_q_entry *midEntry) +{ + spin_lock(&GlobalMid_Lock); + kref_put(&midEntry->refcount, _cifs_mid_q_entry_release); + spin_unlock(&GlobalMid_Lock); +} + +void DeleteMidQEntry(struct mid_q_entry *midEntry) +{ cifs_mid_q_entry_release(midEntry); } @@ -173,8 +181,10 @@ void cifs_delete_mid(struct mid_q_entry *mid) { spin_lock(&GlobalMid_Lock); - list_del_init(&mid->qhead); - mid->mid_flags |= MID_DELETED; + if (!(mid->mid_flags & MID_DELETED)) { + list_del_init(&mid->qhead); + mid->mid_flags |= MID_DELETED; + } spin_unlock(&GlobalMid_Lock); DeleteMidQEntry(mid); @@ -232,7 +242,7 @@ smb_send_kvec(struct TCP_Server_Info *server, struct msghdr *smb_msg, retries++; if (retries >= 14 || (!server->noblocksnd && (retries > 2))) { - cifs_dbg(VFS, "sends on sock %p stuck for 15 seconds\n", + cifs_server_dbg(VFS, "sends on sock %p stuck for 15 seconds\n", ssocket); return -EAGAIN; } @@ -246,7 +256,7 @@ smb_send_kvec(struct TCP_Server_Info *server, struct msghdr *smb_msg, if (rc == 0) { /* should never happen, letting socket clear before retrying is our only obvious option here */ - cifs_dbg(VFS, "tcp sent no data\n"); + cifs_server_dbg(VFS, "tcp sent no data\n"); msleep(500); continue; } @@ -318,8 +328,11 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst, int val = 1; __be32 rfc1002_marker; - if (cifs_rdma_enabled(server) && server->smbd_conn) { - rc = smbd_send(server, num_rqst, rqst); + if (cifs_rdma_enabled(server)) { + /* return -EAGAIN when connecting or reconnecting */ + rc = -EAGAIN; + if (server->smbd_conn) + rc = smbd_send(server, num_rqst, rqst); goto smbd_done; } @@ -440,7 +453,7 @@ unmask: } smbd_done: if (rc < 0 && rc != -EINTR) - cifs_dbg(VFS, "Error %d sending data on socket to server\n", + cifs_server_dbg(VFS, "Error %d sending data on socket to server\n", rc); else if (rc > 0) rc = 0; @@ -473,8 +486,8 @@ smb_send_rqst(struct TCP_Server_Info *server, int num_rqst, cur_rqst[0].rq_nvec = 1; if (!server->ops->init_transform_rq) { - cifs_dbg(VFS, "Encryption requested but transform callback " - "is missing\n"); + cifs_server_dbg(VFS, "Encryption requested but transform " + "callback is missing\n"); return -EIO; } @@ -532,6 +545,8 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, if ((flags & CIFS_TIMEOUT_MASK) == CIFS_NON_BLOCKING) { /* oplock breaks must not be held up */ server->in_flight++; + if (server->in_flight > server->max_in_flight) + server->max_in_flight = server->in_flight; *credits -= 1; *instance = server->reconnect_instance; spin_unlock(&server->req_lock); @@ -548,7 +563,7 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, if (!rc) { trace_smb3_credit_timeout(server->CurrentMid, server->hostname, num_credits); - cifs_dbg(VFS, "wait timed out after %d ms\n", + cifs_server_dbg(VFS, "wait timed out after %d ms\n", timeout); return -ENOTSUPP; } @@ -589,7 +604,7 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, trace_smb3_credit_timeout( server->CurrentMid, server->hostname, num_credits); - cifs_dbg(VFS, "wait timed out after %d ms\n", + cifs_server_dbg(VFS, "wait timed out after %d ms\n", timeout); return -ENOTSUPP; } @@ -608,6 +623,8 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, if ((flags & CIFS_TIMEOUT_MASK) != CIFS_BLOCKING_OP) { *credits -= num_credits; server->in_flight += num_credits; + if (server->in_flight > server->max_in_flight) + server->max_in_flight = server->in_flight; *instance = server->reconnect_instance; } spin_unlock(&server->req_lock); @@ -868,8 +885,11 @@ cifs_sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server) rc = -EHOSTDOWN; break; default: - list_del_init(&mid->qhead); - cifs_dbg(VFS, "%s: invalid mid state mid=%llu state=%d\n", + if (!(mid->mid_flags & MID_DELETED)) { + list_del_init(&mid->qhead); + mid->mid_flags |= MID_DELETED; + } + cifs_server_dbg(VFS, "%s: invalid mid state mid=%llu state=%d\n", __func__, mid->mid, mid->mid_state); rc = -EIO; } @@ -910,7 +930,7 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, rc = cifs_verify_signature(&rqst, server, mid->sequence_number); if (rc) - cifs_dbg(VFS, "SMB signature verification returned error = %d\n", + cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n", rc); } @@ -919,7 +939,8 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, } struct mid_q_entry * -cifs_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst) +cifs_setup_request(struct cifs_ses *ses, struct TCP_Server_Info *ignored, + struct smb_rqst *rqst) { int rc; struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base; @@ -991,7 +1012,18 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses, return -EIO; } - server = ses->server; + if (!ses->binding) { + uint index = 0; + + if (ses->chan_count > 1) { + index = (uint)atomic_inc_return(&ses->chan_seq); + index %= ses->chan_count; + } + server = ses->chans[index].server; + } else { + server = cifs_ses_server(ses); + } + if (server->tcpStatus == CifsExiting) return -ENOENT; @@ -1036,7 +1068,7 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses, } for (i = 0; i < num_rqst; i++) { - midQ[i] = server->ops->setup_request(ses, &rqst[i]); + midQ[i] = server->ops->setup_request(ses, server, &rqst[i]); if (IS_ERR(midQ[i])) { revert_current_mid(server, i); for (j = 0; j < i; j++) @@ -1107,12 +1139,12 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses, } if (rc != 0) { for (; i < num_rqst; i++) { - cifs_dbg(VFS, "Cancelling wait for mid %llu cmd: %d\n", + cifs_server_dbg(VFS, "Cancelling wait for mid %llu cmd: %d\n", midQ[i]->mid, le16_to_cpu(midQ[i]->command)); send_cancel(server, &rqst[i], midQ[i]); spin_lock(&GlobalMid_Lock); + midQ[i]->mid_flags |= MID_WAIT_CANCELLED; if (midQ[i]->mid_state == MID_REQUEST_SUBMITTED) { - midQ[i]->mid_flags |= MID_WAIT_CANCELLED; midQ[i]->callback = cifs_cancelled_callback; cancelled_mid[i] = true; credits[i].value = 0; @@ -1242,17 +1274,19 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses, struct kvec iov = { .iov_base = in_buf, .iov_len = len }; struct smb_rqst rqst = { .rq_iov = &iov, .rq_nvec = 1 }; struct cifs_credits credits = { .value = 1, .instance = 0 }; + struct TCP_Server_Info *server; if (ses == NULL) { cifs_dbg(VFS, "Null smb session\n"); return -EIO; } - if (ses->server == NULL) { + server = ses->server; + if (server == NULL) { cifs_dbg(VFS, "Null tcp session\n"); return -EIO; } - if (ses->server->tcpStatus == CifsExiting) + if (server->tcpStatus == CifsExiting) return -ENOENT; /* Ensure that we do not send more than 50 overlapping requests @@ -1260,12 +1294,12 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses, use ses->maxReq */ if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { - cifs_dbg(VFS, "Illegal length, greater than maximum frame, %d\n", + cifs_server_dbg(VFS, "Illegal length, greater than maximum frame, %d\n", len); return -EIO; } - rc = wait_for_free_request(ses->server, flags, &credits.instance); + rc = wait_for_free_request(server, flags, &credits.instance); if (rc) return rc; @@ -1273,70 +1307,70 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses, and avoid races inside tcp sendmsg code that could cause corruption of smb data */ - mutex_lock(&ses->server->srv_mutex); + mutex_lock(&server->srv_mutex); rc = allocate_mid(ses, in_buf, &midQ); if (rc) { - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); /* Update # of requests on wire to server */ - add_credits(ses->server, &credits, 0); + add_credits(server, &credits, 0); return rc; } - rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number); + rc = cifs_sign_smb(in_buf, server, &midQ->sequence_number); if (rc) { - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); goto out; } midQ->mid_state = MID_REQUEST_SUBMITTED; - cifs_in_send_inc(ses->server); - rc = smb_send(ses->server, in_buf, len); - cifs_in_send_dec(ses->server); + cifs_in_send_inc(server); + rc = smb_send(server, in_buf, len); + cifs_in_send_dec(server); cifs_save_when_sent(midQ); if (rc < 0) - ses->server->sequence_number -= 2; + server->sequence_number -= 2; - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); if (rc < 0) goto out; - rc = wait_for_response(ses->server, midQ); + rc = wait_for_response(server, midQ); if (rc != 0) { - send_cancel(ses->server, &rqst, midQ); + send_cancel(server, &rqst, midQ); spin_lock(&GlobalMid_Lock); if (midQ->mid_state == MID_REQUEST_SUBMITTED) { /* no longer considered to be "in-flight" */ midQ->callback = DeleteMidQEntry; spin_unlock(&GlobalMid_Lock); - add_credits(ses->server, &credits, 0); + add_credits(server, &credits, 0); return rc; } spin_unlock(&GlobalMid_Lock); } - rc = cifs_sync_mid_result(midQ, ses->server); + rc = cifs_sync_mid_result(midQ, server); if (rc != 0) { - add_credits(ses->server, &credits, 0); + add_credits(server, &credits, 0); return rc; } if (!midQ->resp_buf || !out_buf || midQ->mid_state != MID_RESPONSE_RECEIVED) { rc = -EIO; - cifs_dbg(VFS, "Bad MID state?\n"); + cifs_server_dbg(VFS, "Bad MID state?\n"); goto out; } *pbytes_returned = get_rfc1002_length(midQ->resp_buf); memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4); - rc = cifs_check_receive(midQ, ses->server, 0); + rc = cifs_check_receive(midQ, server, 0); out: cifs_delete_mid(midQ); - add_credits(ses->server, &credits, 0); + add_credits(server, &credits, 0); return rc; } @@ -1379,19 +1413,21 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, struct kvec iov = { .iov_base = in_buf, .iov_len = len }; struct smb_rqst rqst = { .rq_iov = &iov, .rq_nvec = 1 }; unsigned int instance; + struct TCP_Server_Info *server; if (tcon == NULL || tcon->ses == NULL) { cifs_dbg(VFS, "Null smb session\n"); return -EIO; } ses = tcon->ses; + server = ses->server; - if (ses->server == NULL) { + if (server == NULL) { cifs_dbg(VFS, "Null tcp session\n"); return -EIO; } - if (ses->server->tcpStatus == CifsExiting) + if (server->tcpStatus == CifsExiting) return -ENOENT; /* Ensure that we do not send more than 50 overlapping requests @@ -1399,12 +1435,12 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, use ses->maxReq */ if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { - cifs_dbg(VFS, "Illegal length, greater than maximum frame, %d\n", + cifs_tcon_dbg(VFS, "Illegal length, greater than maximum frame, %d\n", len); return -EIO; } - rc = wait_for_free_request(ses->server, CIFS_BLOCKING_OP, &instance); + rc = wait_for_free_request(server, CIFS_BLOCKING_OP, &instance); if (rc) return rc; @@ -1412,31 +1448,31 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, and avoid races inside tcp sendmsg code that could cause corruption of smb data */ - mutex_lock(&ses->server->srv_mutex); + mutex_lock(&server->srv_mutex); rc = allocate_mid(ses, in_buf, &midQ); if (rc) { - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); return rc; } - rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number); + rc = cifs_sign_smb(in_buf, server, &midQ->sequence_number); if (rc) { cifs_delete_mid(midQ); - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); return rc; } midQ->mid_state = MID_REQUEST_SUBMITTED; - cifs_in_send_inc(ses->server); - rc = smb_send(ses->server, in_buf, len); - cifs_in_send_dec(ses->server); + cifs_in_send_inc(server); + rc = smb_send(server, in_buf, len); + cifs_in_send_dec(server); cifs_save_when_sent(midQ); if (rc < 0) - ses->server->sequence_number -= 2; + server->sequence_number -= 2; - mutex_unlock(&ses->server->srv_mutex); + mutex_unlock(&server->srv_mutex); if (rc < 0) { cifs_delete_mid(midQ); @@ -1444,21 +1480,21 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, } /* Wait for a reply - allow signals to interrupt. */ - rc = wait_event_interruptible(ses->server->response_q, + rc = wait_event_interruptible(server->response_q, (!(midQ->mid_state == MID_REQUEST_SUBMITTED)) || - ((ses->server->tcpStatus != CifsGood) && - (ses->server->tcpStatus != CifsNew))); + ((server->tcpStatus != CifsGood) && + (server->tcpStatus != CifsNew))); /* Were we interrupted by a signal ? */ if ((rc == -ERESTARTSYS) && (midQ->mid_state == MID_REQUEST_SUBMITTED) && - ((ses->server->tcpStatus == CifsGood) || - (ses->server->tcpStatus == CifsNew))) { + ((server->tcpStatus == CifsGood) || + (server->tcpStatus == CifsNew))) { if (in_buf->Command == SMB_COM_TRANSACTION2) { /* POSIX lock. We send a NT_CANCEL SMB to cause the blocking lock to return. */ - rc = send_cancel(ses->server, &rqst, midQ); + rc = send_cancel(server, &rqst, midQ); if (rc) { cifs_delete_mid(midQ); return rc; @@ -1477,9 +1513,9 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, } } - rc = wait_for_response(ses->server, midQ); + rc = wait_for_response(server, midQ); if (rc) { - send_cancel(ses->server, &rqst, midQ); + send_cancel(server, &rqst, midQ); spin_lock(&GlobalMid_Lock); if (midQ->mid_state == MID_REQUEST_SUBMITTED) { /* no longer considered to be "in-flight" */ @@ -1494,20 +1530,20 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, rstart = 1; } - rc = cifs_sync_mid_result(midQ, ses->server); + rc = cifs_sync_mid_result(midQ, server); if (rc != 0) return rc; /* rcvd frame is ok */ if (out_buf == NULL || midQ->mid_state != MID_RESPONSE_RECEIVED) { rc = -EIO; - cifs_dbg(VFS, "Bad MID state?\n"); + cifs_tcon_dbg(VFS, "Bad MID state?\n"); goto out; } *pbytes_returned = get_rfc1002_length(midQ->resp_buf); memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4); - rc = cifs_check_receive(midQ, ses->server, 0); + rc = cifs_check_receive(midQ, server, 0); out: cifs_delete_mid(midQ); if (rstart && rc == -EACCES) diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index 9076150758d8..b8299173ea7e 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -31,8 +31,9 @@ #include "cifs_fs_sb.h" #include "cifs_unicode.h" -#define MAX_EA_VALUE_SIZE 65535 -#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" +#define MAX_EA_VALUE_SIZE CIFSMaxBufSize +#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */ +#define CIFS_XATTR_CIFS_NTSD "system.cifs_ntsd" /* owner plus DACL */ #define CIFS_XATTR_ATTRIB "cifs.dosattrib" /* full name: user.cifs.dosattrib */ #define CIFS_XATTR_CREATETIME "cifs.creationtime" /* user.cifs.creationtime */ /* @@ -40,12 +41,62 @@ * confusing users and using the 20+ year old term 'cifs' when it is no longer * secure, replaced by SMB2 (then even more highly secure SMB3) many years ago */ -#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" +#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" /* DACL only */ +#define SMB3_XATTR_CIFS_NTSD "system.smb3_ntsd" /* owner plus DACL */ #define SMB3_XATTR_ATTRIB "smb3.dosattrib" /* full name: user.smb3.dosattrib */ #define SMB3_XATTR_CREATETIME "smb3.creationtime" /* user.smb3.creationtime */ /* BB need to add server (Samba e.g) support for security and trusted prefix */ -enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT }; +enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT, + XATTR_CIFS_NTSD }; + +static int cifs_attrib_set(unsigned int xid, struct cifs_tcon *pTcon, + struct inode *inode, char *full_path, + const void *value, size_t size) +{ + ssize_t rc = -EOPNOTSUPP; + __u32 *pattrib = (__u32 *)value; + __u32 attrib; + FILE_BASIC_INFO info_buf; + + if ((value == NULL) || (size != sizeof(__u32))) + return -ERANGE; + + memset(&info_buf, 0, sizeof(info_buf)); + attrib = *pattrib; + info_buf.Attributes = cpu_to_le32(attrib); + if (pTcon->ses->server->ops->set_file_info) + rc = pTcon->ses->server->ops->set_file_info(inode, full_path, + &info_buf, xid); + if (rc == 0) + CIFS_I(inode)->cifsAttrs = attrib; + + return rc; +} + +static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon, + struct inode *inode, char *full_path, + const void *value, size_t size) +{ + ssize_t rc = -EOPNOTSUPP; + __u64 *pcreation_time = (__u64 *)value; + __u64 creation_time; + FILE_BASIC_INFO info_buf; + + if ((value == NULL) || (size != sizeof(__u64))) + return -ERANGE; + + memset(&info_buf, 0, sizeof(info_buf)); + creation_time = *pcreation_time; + info_buf.CreationTime = cpu_to_le64(creation_time); + if (pTcon->ses->server->ops->set_file_info) + rc = pTcon->ses->server->ops->set_file_info(inode, full_path, + &info_buf, xid); + if (rc == 0) + CIFS_I(inode)->createtime = creation_time; + + return rc; +} static int cifs_xattr_set(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, @@ -86,6 +137,23 @@ static int cifs_xattr_set(const struct xattr_handler *handler, switch (handler->flags) { case XATTR_USER: + cifs_dbg(FYI, "%s:setting user xattr %s\n", __func__, name); + if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) || + (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) { + rc = cifs_attrib_set(xid, pTcon, inode, full_path, + value, size); + if (rc == 0) /* force revalidate of the inode */ + CIFS_I(inode)->time = 0; + break; + } else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) || + (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) { + rc = cifs_creation_time_set(xid, pTcon, inode, + full_path, value, size); + if (rc == 0) /* force revalidate of the inode */ + CIFS_I(inode)->time = 0; + break; + } + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) goto out; @@ -95,7 +163,8 @@ static int cifs_xattr_set(const struct xattr_handler *handler, cifs_sb->local_nls, cifs_sb); break; - case XATTR_CIFS_ACL: { + case XATTR_CIFS_ACL: + case XATTR_CIFS_NTSD: { struct cifs_ntsd *pacl; if (!value) @@ -106,12 +175,25 @@ static int cifs_xattr_set(const struct xattr_handler *handler, } else { memcpy(pacl, value, size); if (value && - pTcon->ses->server->ops->set_acl) - rc = pTcon->ses->server->ops->set_acl(pacl, - size, inode, - full_path, CIFS_ACL_DACL); - else + pTcon->ses->server->ops->set_acl) { + rc = 0; + if (handler->flags == XATTR_CIFS_NTSD) { + /* set owner and DACL */ + rc = pTcon->ses->server->ops->set_acl( + pacl, size, inode, + full_path, + CIFS_ACL_OWNER); + } + if (rc == 0) { + /* set DACL */ + rc = pTcon->ses->server->ops->set_acl( + pacl, size, inode, + full_path, + CIFS_ACL_DACL); + } + } else { rc = -EOPNOTSUPP; + } if (rc == 0) /* force revalidate of the inode */ CIFS_I(inode)->time = 0; kfree(pacl); @@ -179,7 +261,7 @@ static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode, void *value, size_t size) { ssize_t rc; - __u64 * pcreatetime; + __u64 *pcreatetime; rc = cifs_revalidate_dentry_attr(dentry); if (rc) @@ -244,7 +326,9 @@ static int cifs_xattr_get(const struct xattr_handler *handler, full_path, name, value, size, cifs_sb); break; - case XATTR_CIFS_ACL: { + case XATTR_CIFS_ACL: + case XATTR_CIFS_NTSD: { + /* the whole ntsd is fetched regardless */ u32 acllen; struct cifs_ntsd *pacl; @@ -382,6 +466,26 @@ static const struct xattr_handler smb3_acl_xattr_handler = { .set = cifs_xattr_set, }; +static const struct xattr_handler cifs_cifs_ntsd_xattr_handler = { + .name = CIFS_XATTR_CIFS_NTSD, + .flags = XATTR_CIFS_NTSD, + .get = cifs_xattr_get, + .set = cifs_xattr_set, +}; + +/* + * Although this is just an alias for the above, need to move away from + * confusing users and using the 20 year old term 'cifs' when it is no + * longer secure and was replaced by SMB2/SMB3 a long time ago, and + * SMB3 and later are highly secure. + */ +static const struct xattr_handler smb3_ntsd_xattr_handler = { + .name = SMB3_XATTR_CIFS_NTSD, + .flags = XATTR_CIFS_NTSD, + .get = cifs_xattr_get, + .set = cifs_xattr_set, +}; + static const struct xattr_handler cifs_posix_acl_access_xattr_handler = { .name = XATTR_NAME_POSIX_ACL_ACCESS, .flags = XATTR_ACL_ACCESS, @@ -401,6 +505,8 @@ const struct xattr_handler *cifs_xattr_handlers[] = { &cifs_os2_xattr_handler, &cifs_cifs_acl_xattr_handler, &smb3_acl_xattr_handler, /* alias for above since avoiding "cifs" */ + &cifs_cifs_ntsd_xattr_handler, + &smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */ &cifs_posix_acl_access_xattr_handler, &cifs_posix_acl_default_xattr_handler, NULL |
