diff options
Diffstat (limited to 'fs')
80 files changed, 2508 insertions, 1714 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 8cd2417a14db..5e8e9d9ccb33 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -426,7 +426,6 @@ config OCFS2_FS select CONFIGFS_FS select JBD select CRC32 - select INET help OCFS2 is a general purpose extent based shared disk cluster file system with many similarities to ext3. It supports 64 bit inode diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES index d04d2f7448d9..85e3850bf2c9 100644 --- a/fs/cifs/CHANGES +++ b/fs/cifs/CHANGES @@ -1,6 +1,8 @@ Version 1.47 ------------ Fix oops in list_del during mount caused by unaligned string. +Seek to SEEK_END forces check for update of file size for non-cached +files. Version 1.46 ------------ diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 10c90294cd18..93ef09971d2f 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -511,7 +511,15 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) { /* origin == SEEK_END => we must revalidate the cached file length */ if (origin == SEEK_END) { - int retval = cifs_revalidate(file->f_path.dentry); + int retval; + + /* some applications poll for the file length in this strange + way so we must seek to end on non-oplocked files by + setting the revalidate time to zero */ + if(file->f_path.dentry->d_inode) + CIFS_I(file->f_path.dentry->d_inode)->time = 0; + + retval = cifs_revalidate(file->f_path.dentry); if (retval < 0) return (loff_t)retval; } diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 8a49b2e77d37..e9dcf5ee29a2 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1146,7 +1146,7 @@ static int cifs_writepages(struct address_space *mapping, pgoff_t end; pgoff_t index; int range_whole = 0; - struct kvec iov[32]; + struct kvec * iov; int len; int n_iov = 0; pgoff_t next; @@ -1171,15 +1171,21 @@ static int cifs_writepages(struct address_space *mapping, if((cifs_sb->tcon->ses) && (cifs_sb->tcon->ses->server)) if(cifs_sb->tcon->ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) - if(!experimEnabled) + if(!experimEnabled) return generic_writepages(mapping, wbc); + iov = kmalloc(32 * sizeof(struct kvec), GFP_KERNEL); + if(iov == NULL) + return generic_writepages(mapping, wbc); + + /* * BB: Is this meaningful for a non-block-device file system? * If it is, we should test it again after we do I/O */ if (wbc->nonblocking && bdi_write_congested(bdi)) { wbc->encountered_congestion = 1; + kfree(iov); return 0; } @@ -1345,7 +1351,7 @@ retry: mapping->writeback_index = index; FreeXid(xid); - + kfree(iov); return rc; } diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 99dfb5337e31..782940be550f 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -156,9 +156,9 @@ static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, tmp_inode->i_atime = cnvrtDosUnixTm( le16_to_cpu(pfindData->LastAccessDate), le16_to_cpu(pfindData->LastAccessTime)); - tmp_inode->i_ctime = cnvrtDosUnixTm( - le16_to_cpu(pfindData->LastWriteDate), - le16_to_cpu(pfindData->LastWriteTime)); + tmp_inode->i_ctime = cnvrtDosUnixTm( + le16_to_cpu(pfindData->LastWriteDate), + le16_to_cpu(pfindData->LastWriteTime)); AdjustForTZ(cifs_sb->tcon, tmp_inode); attr = le16_to_cpu(pfindData->Attributes); allocation_size = le32_to_cpu(pfindData->AllocationSize); diff --git a/fs/cifs/smbdes.c b/fs/cifs/smbdes.c index 7a1b2b961ec8..1b1daf63f062 100644 --- a/fs/cifs/smbdes.c +++ b/fs/cifs/smbdes.c @@ -196,7 +196,7 @@ dohash(char *out, char *in, char *key, int forw) char c[28]; char d[28]; char *cd; - char ki[16][48]; + char (*ki)[48]; char *pd1; char l[32], r[32]; char *rl; @@ -206,6 +206,12 @@ dohash(char *out, char *in, char *key, int forw) if(pk1 == NULL) return; + ki = kmalloc(16*48, GFP_KERNEL); + if(ki == NULL) { + kfree(pk1); + return; + } + cd = pk1 + 56; pd1= cd + 56; rl = pd1 + 64; @@ -243,6 +249,7 @@ dohash(char *out, char *in, char *key, int forw) er = kmalloc(48+48+32+32+32, GFP_KERNEL); if(er == NULL) { kfree(pk1); + kfree(ki); return; } erk = er+48; @@ -290,6 +297,7 @@ dohash(char *out, char *in, char *key, int forw) permute(out, rl, perm6, 64); kfree(pk1); + kfree(ki); } static void diff --git a/fs/configfs/file.c b/fs/configfs/file.c index 2a7cb086e80c..d98be5e01328 100644 --- a/fs/configfs/file.c +++ b/fs/configfs/file.c @@ -162,14 +162,17 @@ fill_write_buffer(struct configfs_buffer * buffer, const char __user * buf, size int error; if (!buffer->page) - buffer->page = (char *)get_zeroed_page(GFP_KERNEL); + buffer->page = (char *)__get_free_pages(GFP_KERNEL, 0); if (!buffer->page) return -ENOMEM; - if (count > PAGE_SIZE) - count = PAGE_SIZE; + if (count >= PAGE_SIZE) + count = PAGE_SIZE - 1; error = copy_from_user(buffer->page,buf,count); buffer->needs_read_fill = 1; + /* if buf is assumed to contain a string, terminate it by \0, + * so e.g. sscanf() can scan the string easily */ + buffer->page[count] = 0; return error ? -EFAULT : count; } diff --git a/fs/dlm/Kconfig b/fs/dlm/Kconfig index b5654a284fef..6fa7b0d5c043 100644 --- a/fs/dlm/Kconfig +++ b/fs/dlm/Kconfig @@ -3,21 +3,21 @@ menu "Distributed Lock Manager" config DLM tristate "Distributed Lock Manager (DLM)" - depends on IPV6 || IPV6=n + depends on SYSFS && (IPV6 || IPV6=n) select CONFIGFS_FS select IP_SCTP if DLM_SCTP help - A general purpose distributed lock manager for kernel or userspace - applications. + A general purpose distributed lock manager for kernel or userspace + applications. choice prompt "Select DLM communications protocol" depends on DLM default DLM_TCP help - The DLM Can use TCP or SCTP for it's network communications. - SCTP supports multi-homed operations whereas TCP doesn't. - However, SCTP seems to have stability problems at the moment. + The DLM Can use TCP or SCTP for it's network communications. + SCTP supports multi-homed operations whereas TCP doesn't. + However, SCTP seems to have stability problems at the moment. config DLM_TCP bool "TCP/IP" @@ -31,8 +31,8 @@ config DLM_DEBUG bool "DLM debugging" depends on DLM help - Under the debugfs mount point, the name of each lockspace will - appear as a file in the "dlm" directory. The output is the - list of resource and locks the local node knows about. + Under the debugfs mount point, the name of each lockspace will + appear as a file in the "dlm" directory. The output is the + list of resource and locks the local node knows about. endmenu diff --git a/fs/dlm/config.c b/fs/dlm/config.c index 88553054bbfa..8665c88e5af2 100644 --- a/fs/dlm/config.c +++ b/fs/dlm/config.c @@ -54,6 +54,11 @@ static struct config_item *make_node(struct config_group *, const char *); static void drop_node(struct config_group *, struct config_item *); static void release_node(struct config_item *); +static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a, + char *buf); +static ssize_t store_cluster(struct config_item *i, + struct configfs_attribute *a, + const char *buf, size_t len); static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, char *buf); static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, @@ -73,6 +78,101 @@ static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len); static ssize_t node_weight_read(struct node *nd, char *buf); static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len); +struct cluster { + struct config_group group; + unsigned int cl_tcp_port; + unsigned int cl_buffer_size; + unsigned int cl_rsbtbl_size; + unsigned int cl_lkbtbl_size; + unsigned int cl_dirtbl_size; + unsigned int cl_recover_timer; + unsigned int cl_toss_secs; + unsigned int cl_scan_secs; + unsigned int cl_log_debug; +}; + +enum { + CLUSTER_ATTR_TCP_PORT = 0, + CLUSTER_ATTR_BUFFER_SIZE, + CLUSTER_ATTR_RSBTBL_SIZE, + CLUSTER_ATTR_LKBTBL_SIZE, + CLUSTER_ATTR_DIRTBL_SIZE, + CLUSTER_ATTR_RECOVER_TIMER, + CLUSTER_ATTR_TOSS_SECS, + CLUSTER_ATTR_SCAN_SECS, + CLUSTER_ATTR_LOG_DEBUG, +}; + +struct cluster_attribute { + struct configfs_attribute attr; + ssize_t (*show)(struct cluster *, char *); + ssize_t (*store)(struct cluster *, const char *, size_t); +}; + +static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field, + unsigned int *info_field, int check_zero, + const char *buf, size_t len) +{ + unsigned int x; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + x = simple_strtoul(buf, NULL, 0); + + if (check_zero && !x) + return -EINVAL; + + *cl_field = x; + *info_field = x; + + return len; +} + +#define __CONFIGFS_ATTR(_name,_mode,_read,_write) { \ + .attr = { .ca_name = __stringify(_name), \ + .ca_mode = _mode, \ + .ca_owner = THIS_MODULE }, \ + .show = _read, \ + .store = _write, \ +} + +#define CLUSTER_ATTR(name, check_zero) \ +static ssize_t name##_write(struct cluster *cl, const char *buf, size_t len) \ +{ \ + return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ + check_zero, buf, len); \ +} \ +static ssize_t name##_read(struct cluster *cl, char *buf) \ +{ \ + return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ +} \ +static struct cluster_attribute cluster_attr_##name = \ +__CONFIGFS_ATTR(name, 0644, name##_read, name##_write) + +CLUSTER_ATTR(tcp_port, 1); +CLUSTER_ATTR(buffer_size, 1); +CLUSTER_ATTR(rsbtbl_size, 1); +CLUSTER_ATTR(lkbtbl_size, 1); +CLUSTER_ATTR(dirtbl_size, 1); +CLUSTER_ATTR(recover_timer, 1); +CLUSTER_ATTR(toss_secs, 1); +CLUSTER_ATTR(scan_secs, 1); +CLUSTER_ATTR(log_debug, 0); + +static struct configfs_attribute *cluster_attrs[] = { + [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr, + [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr, + [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr, + [CLUSTER_ATTR_LKBTBL_SIZE] = &cluster_attr_lkbtbl_size.attr, + [CLUSTER_ATTR_DIRTBL_SIZE] = &cluster_attr_dirtbl_size.attr, + [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr, + [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr, + [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr, + [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr, + NULL, +}; + enum { COMM_ATTR_NODEID = 0, COMM_ATTR_LOCAL, @@ -152,10 +252,6 @@ struct clusters { struct configfs_subsystem subsys; }; -struct cluster { - struct config_group group; -}; - struct spaces { struct config_group ss_group; }; @@ -197,6 +293,8 @@ static struct configfs_group_operations clusters_ops = { static struct configfs_item_operations cluster_ops = { .release = release_cluster, + .show_attribute = show_cluster, + .store_attribute = store_cluster, }; static struct configfs_group_operations spaces_ops = { @@ -237,6 +335,7 @@ static struct config_item_type clusters_type = { static struct config_item_type cluster_type = { .ct_item_ops = &cluster_ops, + .ct_attrs = cluster_attrs, .ct_owner = THIS_MODULE, }; @@ -317,6 +416,16 @@ static struct config_group *make_cluster(struct config_group *g, cl->group.default_groups[1] = &cms->cs_group; cl->group.default_groups[2] = NULL; + cl->cl_tcp_port = dlm_config.ci_tcp_port; + cl->cl_buffer_size = dlm_config.ci_buffer_size; + cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; + cl->cl_lkbtbl_size = dlm_config.ci_lkbtbl_size; + cl->cl_dirtbl_size = dlm_config.ci_dirtbl_size; + cl->cl_recover_timer = dlm_config.ci_recover_timer; + cl->cl_toss_secs = dlm_config.ci_toss_secs; + cl->cl_scan_secs = dlm_config.ci_scan_secs; + cl->cl_log_debug = dlm_config.ci_log_debug; + space_list = &sps->ss_group; comm_list = &cms->cs_group; return &cl->group; @@ -509,6 +618,25 @@ void dlm_config_exit(void) * Functions for user space to read/write attributes */ +static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a, + char *buf) +{ + struct cluster *cl = to_cluster(i); + struct cluster_attribute *cla = + container_of(a, struct cluster_attribute, attr); + return cla->show ? cla->show(cl, buf) : 0; +} + +static ssize_t store_cluster(struct config_item *i, + struct configfs_attribute *a, + const char *buf, size_t len) +{ + struct cluster *cl = to_cluster(i); + struct cluster_attribute *cla = + container_of(a, struct cluster_attribute, attr); + return cla->store ? cla->store(cl, buf, len) : -EINVAL; +} + static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, char *buf) { @@ -775,15 +903,17 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num) #define DEFAULT_RECOVER_TIMER 5 #define DEFAULT_TOSS_SECS 10 #define DEFAULT_SCAN_SECS 5 +#define DEFAULT_LOG_DEBUG 0 struct dlm_config_info dlm_config = { - .tcp_port = DEFAULT_TCP_PORT, - .buffer_size = DEFAULT_BUFFER_SIZE, - .rsbtbl_size = DEFAULT_RSBTBL_SIZE, - .lkbtbl_size = DEFAULT_LKBTBL_SIZE, - .dirtbl_size = DEFAULT_DIRTBL_SIZE, - .recover_timer = DEFAULT_RECOVER_TIMER, - .toss_secs = DEFAULT_TOSS_SECS, - .scan_secs = DEFAULT_SCAN_SECS + .ci_tcp_port = DEFAULT_TCP_PORT, + .ci_buffer_size = DEFAULT_BUFFER_SIZE, + .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, + .ci_lkbtbl_size = DEFAULT_LKBTBL_SIZE, + .ci_dirtbl_size = DEFAULT_DIRTBL_SIZE, + .ci_recover_timer = DEFAULT_RECOVER_TIMER, + .ci_toss_secs = DEFAULT_TOSS_SECS, + .ci_scan_secs = DEFAULT_SCAN_SECS, + .ci_log_debug = DEFAULT_LOG_DEBUG }; diff --git a/fs/dlm/config.h b/fs/dlm/config.h index 9da7839958a9..1e978611a96e 100644 --- a/fs/dlm/config.h +++ b/fs/dlm/config.h @@ -17,14 +17,15 @@ #define DLM_MAX_ADDR_COUNT 3 struct dlm_config_info { - int tcp_port; - int buffer_size; - int rsbtbl_size; - int lkbtbl_size; - int dirtbl_size; - int recover_timer; - int toss_secs; - int scan_secs; + int ci_tcp_port; + int ci_buffer_size; + int ci_rsbtbl_size; + int ci_lkbtbl_size; + int ci_dirtbl_size; + int ci_recover_timer; + int ci_toss_secs; + int ci_scan_secs; + int ci_log_debug; }; extern struct dlm_config_info dlm_config; diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index 1ee8195e6fc0..61d93201e1b2 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -41,6 +41,7 @@ #include <asm/uaccess.h> #include <linux/dlm.h> +#include "config.h" #define DLM_LOCKSPACE_LEN 64 @@ -69,12 +70,12 @@ struct dlm_mhandle; #define log_error(ls, fmt, args...) \ printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) -#define DLM_LOG_DEBUG -#ifdef DLM_LOG_DEBUG -#define log_debug(ls, fmt, args...) log_error(ls, fmt, ##args) -#else -#define log_debug(ls, fmt, args...) -#endif +#define log_debug(ls, fmt, args...) \ +do { \ + if (dlm_config.ci_log_debug) \ + printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ + (ls)->ls_name , ##args); \ +} while (0) #define DLM_ASSERT(x, do) \ { \ @@ -309,8 +310,8 @@ static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) /* dlm_header is first element of all structs sent between nodes */ -#define DLM_HEADER_MAJOR 0x00020000 -#define DLM_HEADER_MINOR 0x00000001 +#define DLM_HEADER_MAJOR 0x00030000 +#define DLM_HEADER_MINOR 0x00000000 #define DLM_MSG 1 #define DLM_RCOM 2 @@ -386,6 +387,8 @@ struct dlm_rcom { uint32_t rc_type; /* DLM_RCOM_ */ int rc_result; /* multi-purpose */ uint64_t rc_id; /* match reply with request */ + uint64_t rc_seq; /* sender's ls_recover_seq */ + uint64_t rc_seq_reply; /* remote ls_recover_seq */ char rc_buf[0]; }; @@ -523,6 +526,7 @@ struct dlm_user_proc { spinlock_t asts_spin; struct list_head locks; spinlock_t locks_spin; + struct list_head unlocking; wait_queue_head_t wait; }; diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index 30878defaeb6..e725005fafd0 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -754,6 +754,11 @@ static void add_to_waiters(struct dlm_lkb *lkb, int mstype) mutex_unlock(&ls->ls_waiters_mutex); } +/* We clear the RESEND flag because we might be taking an lkb off the waiters + list as part of process_requestqueue (e.g. a lookup that has an optimized + request reply on the requestqueue) between dlm_recover_waiters_pre() which + set RESEND and dlm_recover_waiters_post() */ + static int _remove_from_waiters(struct dlm_lkb *lkb) { int error = 0; @@ -764,6 +769,7 @@ static int _remove_from_waiters(struct dlm_lkb *lkb) goto out; } lkb->lkb_wait_type = 0; + lkb->lkb_flags &= ~DLM_IFL_RESEND; list_del(&lkb->lkb_wait_reply); unhold_lkb(lkb); out: @@ -810,7 +816,7 @@ static int shrink_bucket(struct dlm_ls *ls, int b) list_for_each_entry_reverse(r, &ls->ls_rsbtbl[b].toss, res_hashchain) { if (!time_after_eq(jiffies, r->res_toss_time + - dlm_config.toss_secs * HZ)) + dlm_config.ci_toss_secs * HZ)) continue; found = 1; break; @@ -2144,12 +2150,24 @@ static void send_args(struct dlm_rsb *r, struct dlm_lkb *lkb, if (lkb->lkb_astaddr) ms->m_asts |= AST_COMP; - if (ms->m_type == DLM_MSG_REQUEST || ms->m_type == DLM_MSG_LOOKUP) - memcpy(ms->m_extra, r->res_name, r->res_length); + /* compare with switch in create_message; send_remove() doesn't + use send_args() */ - else if (lkb->lkb_lvbptr) + switch (ms->m_type) { + case DLM_MSG_REQUEST: + case DLM_MSG_LOOKUP: + memcpy(ms->m_extra, r->res_name, r->res_length); + break; + case DLM_MSG_CONVERT: + case DLM_MSG_UNLOCK: + case DLM_MSG_REQUEST_REPLY: + case DLM_MSG_CONVERT_REPLY: + case DLM_MSG_GRANT: + if (!lkb->lkb_lvbptr) + break; memcpy(ms->m_extra, lkb->lkb_lvbptr, r->res_ls->ls_lvblen); - + break; + } } static int send_common(struct dlm_rsb *r, struct dlm_lkb *lkb, int mstype) @@ -2418,8 +2436,12 @@ static int receive_request_args(struct dlm_ls *ls, struct dlm_lkb *lkb, DLM_ASSERT(is_master_copy(lkb), dlm_print_lkb(lkb);); - if (receive_lvb(ls, lkb, ms)) - return -ENOMEM; + if (lkb->lkb_exflags & DLM_LKF_VALBLK) { + /* lkb was just created so there won't be an lvb yet */ + lkb->lkb_lvbptr = allocate_lvb(ls); + if (!lkb->lkb_lvbptr) + return -ENOMEM; + } return 0; } @@ -3002,7 +3024,7 @@ int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery) { struct dlm_message *ms = (struct dlm_message *) hd; struct dlm_ls *ls; - int error; + int error = 0; if (!recovery) dlm_message_in(ms); @@ -3119,7 +3141,7 @@ int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery) out: dlm_put_lockspace(ls); dlm_astd_wake(); - return 0; + return error; } @@ -3132,6 +3154,7 @@ static void recover_convert_waiter(struct dlm_ls *ls, struct dlm_lkb *lkb) if (middle_conversion(lkb)) { hold_lkb(lkb); ls->ls_stub_ms.m_result = -EINPROGRESS; + ls->ls_stub_ms.m_flags = lkb->lkb_flags; _remove_from_waiters(lkb); _receive_convert_reply(lkb, &ls->ls_stub_ms); @@ -3205,6 +3228,7 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls) case DLM_MSG_UNLOCK: hold_lkb(lkb); ls->ls_stub_ms.m_result = -DLM_EUNLOCK; + ls->ls_stub_ms.m_flags = lkb->lkb_flags; _remove_from_waiters(lkb); _receive_unlock_reply(lkb, &ls->ls_stub_ms); dlm_put_lkb(lkb); @@ -3213,6 +3237,7 @@ void dlm_recover_waiters_pre(struct dlm_ls *ls) case DLM_MSG_CANCEL: hold_lkb(lkb); ls->ls_stub_ms.m_result = -DLM_ECANCEL; + ls->ls_stub_ms.m_flags = lkb->lkb_flags; _remove_from_waiters(lkb); _receive_cancel_reply(lkb, &ls->ls_stub_ms); dlm_put_lkb(lkb); @@ -3571,6 +3596,14 @@ int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc) lock_rsb(r); switch (error) { + case -EBADR: + /* There's a chance the new master received our lock before + dlm_recover_master_reply(), this wouldn't happen if we did + a barrier between recover_masters and recover_locks. */ + log_debug(ls, "master copy not ready %x r %lx %s", lkb->lkb_id, + (unsigned long)r, r->res_name); + dlm_send_rcom_lock(r, lkb); + goto out; case -EEXIST: log_debug(ls, "master copy exists %x", lkb->lkb_id); /* fall through */ @@ -3585,7 +3618,7 @@ int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc) /* an ack for dlm_recover_locks() which waits for replies from all the locks it sends to new masters */ dlm_recovered_lock(r); - + out: unlock_rsb(r); put_rsb(r); dlm_put_lkb(lkb); @@ -3610,7 +3643,7 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, } if (flags & DLM_LKF_VALBLK) { - ua->lksb.sb_lvbptr = kmalloc(DLM_USER_LVB_LEN, GFP_KERNEL); + ua->lksb.sb_lvbptr = kzalloc(DLM_USER_LVB_LEN, GFP_KERNEL); if (!ua->lksb.sb_lvbptr) { kfree(ua); __put_lkb(ls, lkb); @@ -3679,7 +3712,7 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp, ua = (struct dlm_user_args *)lkb->lkb_astparam; if (flags & DLM_LKF_VALBLK && !ua->lksb.sb_lvbptr) { - ua->lksb.sb_lvbptr = kmalloc(DLM_USER_LVB_LEN, GFP_KERNEL); + ua->lksb.sb_lvbptr = kzalloc(DLM_USER_LVB_LEN, GFP_KERNEL); if (!ua->lksb.sb_lvbptr) { error = -ENOMEM; goto out_put; @@ -3745,12 +3778,10 @@ int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp, goto out_put; spin_lock(&ua->proc->locks_spin); - list_del_init(&lkb->lkb_ownqueue); + /* dlm_user_add_ast() may have already taken lkb off the proc list */ + if (!list_empty(&lkb->lkb_ownqueue)) + list_move(&lkb->lkb_ownqueue, &ua->proc->unlocking); spin_unlock(&ua->proc->locks_spin); - - /* this removes the reference for the proc->locks list added by - dlm_user_request */ - unhold_lkb(lkb); out_put: dlm_put_lkb(lkb); out: @@ -3790,9 +3821,8 @@ int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp, /* this lkb was removed from the WAITING queue */ if (lkb->lkb_grmode == DLM_LOCK_IV) { spin_lock(&ua->proc->locks_spin); - list_del_init(&lkb->lkb_ownqueue); + list_move(&lkb->lkb_ownqueue, &ua->proc->unlocking); spin_unlock(&ua->proc->locks_spin); - unhold_lkb(lkb); } out_put: dlm_put_lkb(lkb); @@ -3853,11 +3883,6 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc) mutex_lock(&ls->ls_clear_proc_locks); list_for_each_entry_safe(lkb, safe, &proc->locks, lkb_ownqueue) { - if (lkb->lkb_ast_type) { - list_del(&lkb->lkb_astqueue); - unhold_lkb(lkb); - } - list_del_init(&lkb->lkb_ownqueue); if (lkb->lkb_exflags & DLM_LKF_PERSISTENT) { @@ -3874,6 +3899,20 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc) dlm_put_lkb(lkb); } + + /* in-progress unlocks */ + list_for_each_entry_safe(lkb, safe, &proc->unlocking, lkb_ownqueue) { + list_del_init(&lkb->lkb_ownqueue); + lkb->lkb_flags |= DLM_IFL_DEAD; + dlm_put_lkb(lkb); + } + + list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_astqueue) { + list_del(&lkb->lkb_astqueue); + dlm_put_lkb(lkb); + } + mutex_unlock(&ls->ls_clear_proc_locks); unlock_recovery(ls); } + diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c index 59012b089e8d..f40817b53c6f 100644 --- a/fs/dlm/lockspace.c +++ b/fs/dlm/lockspace.c @@ -236,7 +236,7 @@ static int dlm_scand(void *data) while (!kthread_should_stop()) { list_for_each_entry(ls, &lslist, ls_list) dlm_scan_rsbs(ls); - schedule_timeout_interruptible(dlm_config.scan_secs * HZ); + schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); } return 0; } @@ -422,7 +422,7 @@ static int new_lockspace(char *name, int namelen, void **lockspace, ls->ls_count = 0; ls->ls_flags = 0; - size = dlm_config.rsbtbl_size; + size = dlm_config.ci_rsbtbl_size; ls->ls_rsbtbl_size = size; ls->ls_rsbtbl = kmalloc(sizeof(struct dlm_rsbtable) * size, GFP_KERNEL); @@ -434,7 +434,7 @@ static int new_lockspace(char *name, int namelen, void **lockspace, rwlock_init(&ls->ls_rsbtbl[i].lock); } - size = dlm_config.lkbtbl_size; + size = dlm_config.ci_lkbtbl_size; ls->ls_lkbtbl_size = size; ls->ls_lkbtbl = kmalloc(sizeof(struct dlm_lkbtable) * size, GFP_KERNEL); @@ -446,7 +446,7 @@ static int new_lockspace(char *name, int namelen, void **lockspace, ls->ls_lkbtbl[i].counter = 1; } - size = dlm_config.dirtbl_size; + size = dlm_config.ci_dirtbl_size; ls->ls_dirtbl_size = size; ls->ls_dirtbl = kmalloc(sizeof(struct dlm_dirtable) * size, GFP_KERNEL); @@ -489,7 +489,7 @@ static int new_lockspace(char *name, int namelen, void **lockspace, mutex_init(&ls->ls_requestqueue_mutex); mutex_init(&ls->ls_clear_proc_locks); - ls->ls_recover_buf = kmalloc(dlm_config.buffer_size, GFP_KERNEL); + ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_KERNEL); if (!ls->ls_recover_buf) goto out_dirfree; diff --git a/fs/dlm/lowcomms-sctp.c b/fs/dlm/lowcomms-sctp.c index fe158d7a9285..dc83a9d979b5 100644 --- a/fs/dlm/lowcomms-sctp.c +++ b/fs/dlm/lowcomms-sctp.c @@ -72,6 +72,8 @@ struct nodeinfo { struct list_head writequeue; /* outgoing writequeue_entries */ spinlock_t writequeue_lock; int nodeid; + struct work_struct swork; /* Send workqueue */ + struct work_struct lwork; /* Locking workqueue */ }; static DEFINE_IDR(nodeinfo_idr); @@ -96,6 +98,7 @@ struct connection { atomic_t waiting_requests; struct cbuf cb; int eagain_flag; + struct work_struct work; /* Send workqueue */ }; /* An entry waiting to be sent */ @@ -137,19 +140,23 @@ static void cbuf_eat(struct cbuf *cb, int n) static LIST_HEAD(write_nodes); static DEFINE_SPINLOCK(write_nodes_lock); + /* Maximum number of incoming messages to process before * doing a schedule() */ #define MAX_RX_MSG_COUNT 25 -/* Manage daemons */ -static struct task_struct *recv_task; -static struct task_struct *send_task; -static DECLARE_WAIT_QUEUE_HEAD(lowcomms_recv_wait); +/* Work queues */ +static struct workqueue_struct *recv_workqueue; +static struct workqueue_struct *send_workqueue; +static struct workqueue_struct *lock_workqueue; /* The SCTP connection */ static struct connection sctp_con; +static void process_send_sockets(struct work_struct *work); +static void process_recv_sockets(struct work_struct *work); +static void process_lock_request(struct work_struct *work); static int nodeid_to_addr(int nodeid, struct sockaddr *retaddr) { @@ -222,6 +229,8 @@ static struct nodeinfo *nodeid2nodeinfo(int nodeid, gfp_t alloc) spin_lock_init(&ni->lock); INIT_LIST_HEAD(&ni->writequeue); spin_lock_init(&ni->writequeue_lock); + INIT_WORK(&ni->lwork, process_lock_request); + INIT_WORK(&ni->swork, process_send_sockets); ni->nodeid = nodeid; if (nodeid > max_nodeid) @@ -249,11 +258,8 @@ static struct nodeinfo *assoc2nodeinfo(sctp_assoc_t assoc) /* Data or notification available on socket */ static void lowcomms_data_ready(struct sock *sk, int count_unused) { - atomic_inc(&sctp_con.waiting_requests); if (test_and_set_bit(CF_READ_PENDING, &sctp_con.flags)) - return; - - wake_up_interruptible(&lowcomms_recv_wait); + queue_work(recv_workqueue, &sctp_con.work); } @@ -361,10 +367,10 @@ static void init_failed(void) spin_lock_bh(&write_nodes_lock); list_add_tail(&ni->write_list, &write_nodes); spin_unlock_bh(&write_nodes_lock); + queue_work(send_workqueue, &ni->swork); } } } - wake_up_process(send_task); } /* Something happened to an association */ @@ -446,8 +452,8 @@ static void process_sctp_notification(struct msghdr *msg, char *buf) spin_lock_bh(&write_nodes_lock); list_add_tail(&ni->write_list, &write_nodes); spin_unlock_bh(&write_nodes_lock); + queue_work(send_workqueue, &ni->swork); } - wake_up_process(send_task); } break; @@ -580,8 +586,8 @@ static int receive_from_sock(void) spin_lock_bh(&write_nodes_lock); list_add_tail(&ni->write_list, &write_nodes); spin_unlock_bh(&write_nodes_lock); + queue_work(send_workqueue, &ni->swork); } - wake_up_process(send_task); } } @@ -590,6 +596,7 @@ static int receive_from_sock(void) return 0; cbuf_add(&sctp_con.cb, ret); + // PJC: TODO: Add to node's workqueue....can we ?? ret = dlm_process_incoming_buffer(cpu_to_le32(sinfo->sinfo_ppid), page_address(sctp_con.rx_page), sctp_con.cb.base, sctp_con.cb.len, @@ -635,7 +642,7 @@ static int add_bind_addr(struct sockaddr_storage *addr, int addr_len, int num) if (result < 0) log_print("Can't bind to port %d addr number %d", - dlm_config.tcp_port, num); + dlm_config.ci_tcp_port, num); return result; } @@ -711,7 +718,7 @@ static int init_sock(void) /* Bind to all interfaces. */ for (i = 0; i < dlm_local_count; i++) { memcpy(&localaddr, dlm_local_addr[i], sizeof(localaddr)); - make_sockaddr(&localaddr, dlm_config.tcp_port, &addr_len); + make_sockaddr(&localaddr, dlm_config.ci_tcp_port, &addr_len); result = add_bind_addr(&localaddr, addr_len, num); if (result) @@ -820,7 +827,8 @@ void dlm_lowcomms_commit_buffer(void *arg) spin_lock_bh(&write_nodes_lock); list_add_tail(&ni->write_list, &write_nodes); spin_unlock_bh(&write_nodes_lock); - wake_up_process(send_task); + + queue_work(send_workqueue, &ni->swork); } return; @@ -863,7 +871,7 @@ static void initiate_association(int nodeid) return; } - make_sockaddr(&rem_addr, dlm_config.tcp_port, &addrlen); + make_sockaddr(&rem_addr, dlm_config.ci_tcp_port, &addrlen); outmessage.msg_name = &rem_addr; outmessage.msg_namelen = addrlen; @@ -1088,101 +1096,75 @@ int dlm_lowcomms_close(int nodeid) return 0; } -static int write_list_empty(void) +// PJC: The work queue function for receiving. +static void process_recv_sockets(struct work_struct *work) { - int status; - - spin_lock_bh(&write_nodes_lock); - status = list_empty(&write_nodes); - spin_unlock_bh(&write_nodes_lock); - - return status; -} - -static int dlm_recvd(void *data) -{ - DECLARE_WAITQUEUE(wait, current); - - while (!kthread_should_stop()) { + if (test_and_clear_bit(CF_READ_PENDING, &sctp_con.flags)) { + int ret; int count = 0; - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&lowcomms_recv_wait, &wait); - if (!test_bit(CF_READ_PENDING, &sctp_con.flags)) - cond_resched(); - remove_wait_queue(&lowcomms_recv_wait, &wait); - set_current_state(TASK_RUNNING); - - if (test_and_clear_bit(CF_READ_PENDING, &sctp_con.flags)) { - int ret; - - do { - ret = receive_from_sock(); + do { + ret = receive_from_sock(); - /* Don't starve out everyone else */ - if (++count >= MAX_RX_MSG_COUNT) { - cond_resched(); - count = 0; - } - } while (!kthread_should_stop() && ret >=0); - } - cond_resched(); + /* Don't starve out everyone else */ + if (++count >= MAX_RX_MSG_COUNT) { + cond_resched(); + count = 0; + } + } while (!kthread_should_stop() && ret >=0); } - - return 0; + cond_resched(); } -static int dlm_sendd(void *data) +// PJC: the work queue function for sending +static void process_send_sockets(struct work_struct *work) { - DECLARE_WAITQUEUE(wait, current); - - add_wait_queue(sctp_con.sock->sk->sk_sleep, &wait); - - while (!kthread_should_stop()) { - set_current_state(TASK_INTERRUPTIBLE); - if (write_list_empty()) - cond_resched(); - set_current_state(TASK_RUNNING); - - if (sctp_con.eagain_flag) { - sctp_con.eagain_flag = 0; - refill_write_queue(); - } - process_output_queue(); + if (sctp_con.eagain_flag) { + sctp_con.eagain_flag = 0; + refill_write_queue(); } + process_output_queue(); +} - remove_wait_queue(sctp_con.sock->sk->sk_sleep, &wait); - - return 0; +// PJC: Process lock requests from a particular node. +// TODO: can we optimise this out on UP ?? +static void process_lock_request(struct work_struct *work) +{ } static void daemons_stop(void) { - kthread_stop(recv_task); - kthread_stop(send_task); + destroy_workqueue(recv_workqueue); + destroy_workqueue(send_workqueue); + destroy_workqueue(lock_workqueue); } static int daemons_start(void) { - struct task_struct *p; int error; + recv_workqueue = create_workqueue("dlm_recv"); + error = IS_ERR(recv_workqueue); + if (error) { + log_print("can't start dlm_recv %d", error); + return error; + } - p = kthread_run(dlm_recvd, NULL, "dlm_recvd"); - error = IS_ERR(p); + send_workqueue = create_singlethread_workqueue("dlm_send"); + error = IS_ERR(send_workqueue); if (error) { - log_print("can't start dlm_recvd %d", error); + log_print("can't start dlm_send %d", error); + destroy_workqueue(recv_workqueue); return error; } - recv_task = p; - p = kthread_run(dlm_sendd, NULL, "dlm_sendd"); - error = IS_ERR(p); + lock_workqueue = create_workqueue("dlm_rlock"); + error = IS_ERR(lock_workqueue); if (error) { - log_print("can't start dlm_sendd %d", error); - kthread_stop(recv_task); + log_print("can't start dlm_rlock %d", error); + destroy_workqueue(send_workqueue); + destroy_workqueue(recv_workqueue); return error; } - send_task = p; return 0; } @@ -1194,6 +1176,8 @@ int dlm_lowcomms_start(void) { int error; + INIT_WORK(&sctp_con.work, process_recv_sockets); + error = init_sock(); if (error) goto fail_sock; @@ -1224,4 +1208,3 @@ void dlm_lowcomms_stop(void) for (i = 0; i < dlm_local_count; i++) kfree(dlm_local_addr[i]); } - diff --git a/fs/dlm/lowcomms-tcp.c b/fs/dlm/lowcomms-tcp.c index 9be3a440c42a..f1efd17b2614 100644 --- a/fs/dlm/lowcomms-tcp.c +++ b/fs/dlm/lowcomms-tcp.c @@ -2,7 +2,7 @@ ******************************************************************************* ** ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. -** Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. +** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. ** ** This copyrighted material is made available to anyone wishing to use, ** modify, copy, or redistribute it subject to the terms and conditions @@ -96,10 +96,7 @@ static bool cbuf_empty(struct cbuf *cb) struct connection { struct socket *sock; /* NULL if not connected */ uint32_t nodeid; /* So we know who we are in the list */ - struct rw_semaphore sock_sem; /* Stop connect races */ - struct list_head read_list; /* On this list when ready for reading */ - struct list_head write_list; /* On this list when ready for writing */ - struct list_head state_list; /* On this list when ready to connect */ + struct mutex sock_mutex; unsigned long flags; /* bit 1,2 = We are on the read/write lists */ #define CF_READ_PENDING 1 #define CF_WRITE_PENDING 2 @@ -112,9 +109,10 @@ struct connection { struct page *rx_page; struct cbuf cb; int retries; - atomic_t waiting_requests; #define MAX_CONNECT_RETRIES 3 struct connection *othercon; + struct work_struct rwork; /* Receive workqueue */ + struct work_struct swork; /* Send workqueue */ }; #define sock2con(x) ((struct connection *)(x)->sk_user_data) @@ -131,14 +129,9 @@ struct writequeue_entry { static struct sockaddr_storage dlm_local_addr; -/* Manage daemons */ -static struct task_struct *recv_task; -static struct task_struct *send_task; - -static wait_queue_t lowcomms_send_waitq_head; -static DECLARE_WAIT_QUEUE_HEAD(lowcomms_send_waitq); -static wait_queue_t lowcomms_recv_waitq_head; -static DECLARE_WAIT_QUEUE_HEAD(lowcomms_recv_waitq); +/* Work queues */ +static struct workqueue_struct *recv_workqueue; +static struct workqueue_struct *send_workqueue; /* An array of pointers to connections, indexed by NODEID */ static struct connection **connections; @@ -146,17 +139,8 @@ static DECLARE_MUTEX(connections_lock); static struct kmem_cache *con_cache; static int conn_array_size; -/* List of sockets that have reads pending */ -static LIST_HEAD(read_sockets); -static DEFINE_SPINLOCK(read_sockets_lock); - -/* List of sockets which have writes pending */ -static LIST_HEAD(write_sockets); -static DEFINE_SPINLOCK(write_sockets_lock); - -/* List of sockets which have connects pending */ -static LIST_HEAD(state_sockets); -static DEFINE_SPINLOCK(state_sockets_lock); +static void process_recv_sockets(struct work_struct *work); +static void process_send_sockets(struct work_struct *work); static struct connection *nodeid2con(int nodeid, gfp_t allocation) { @@ -186,9 +170,11 @@ static struct connection *nodeid2con(int nodeid, gfp_t allocation) goto finish; con->nodeid = nodeid; - init_rwsem(&con->sock_sem); + mutex_init(&con->sock_mutex); INIT_LIST_HEAD(&con->writequeue); spin_lock_init(&con->writequeue_lock); + INIT_WORK(&con->swork, process_send_sockets); + INIT_WORK(&con->rwork, process_recv_sockets); connections[nodeid] = con; } @@ -203,41 +189,22 @@ static void lowcomms_data_ready(struct sock *sk, int count_unused) { struct connection *con = sock2con(sk); - atomic_inc(&con->waiting_requests); - if (test_and_set_bit(CF_READ_PENDING, &con->flags)) - return; - - spin_lock_bh(&read_sockets_lock); - list_add_tail(&con->read_list, &read_sockets); - spin_unlock_bh(&read_sockets_lock); - - wake_up_interruptible(&lowcomms_recv_waitq); + if (!test_and_set_bit(CF_READ_PENDING, &con->flags)) + queue_work(recv_workqueue, &con->rwork); } static void lowcomms_write_space(struct sock *sk) { struct connection *con = sock2con(sk); - if (test_and_set_bit(CF_WRITE_PENDING, &con->flags)) - return; - - spin_lock_bh(&write_sockets_lock); - list_add_tail(&con->write_list, &write_sockets); - spin_unlock_bh(&write_sockets_lock); - - wake_up_interruptible(&lowcomms_send_waitq); + if (!test_and_set_bit(CF_WRITE_PENDING, &con->flags)) + queue_work(send_workqueue, &con->swork); } static inline void lowcomms_connect_sock(struct connection *con) { - if (test_and_set_bit(CF_CONNECT_PENDING, &con->flags)) - return; - - spin_lock_bh(&state_sockets_lock); - list_add_tail(&con->state_list, &state_sockets); - spin_unlock_bh(&state_sockets_lock); - - wake_up_interruptible(&lowcomms_send_waitq); + if (!test_and_set_bit(CF_CONNECT_PENDING, &con->flags)) + queue_work(send_workqueue, &con->swork); } static void lowcomms_state_change(struct sock *sk) @@ -279,7 +246,7 @@ static void make_sockaddr(struct sockaddr_storage *saddr, uint16_t port, /* Close a remote connection and tidy up */ static void close_connection(struct connection *con, bool and_other) { - down_write(&con->sock_sem); + mutex_lock(&con->sock_mutex); if (con->sock) { sock_release(con->sock); @@ -294,7 +261,7 @@ static void close_connection(struct connection *con, bool and_other) con->rx_page = NULL; } con->retries = 0; - up_write(&con->sock_sem); + mutex_unlock(&con->sock_mutex); } /* Data received from remote end */ @@ -308,10 +275,13 @@ static int receive_from_sock(struct connection *con) int r; int call_again_soon = 0; - down_read(&con->sock_sem); + mutex_lock(&con->sock_mutex); + + if (con->sock == NULL) { + ret = -EAGAIN; + goto out_close; + } - if (con->sock == NULL) - goto out; if (con->rx_page == NULL) { /* * This doesn't need to be atomic, but I think it should @@ -359,6 +329,9 @@ static int receive_from_sock(struct connection *con) if (ret <= 0) goto out_close; + if (ret == -EAGAIN) + goto out_resched; + if (ret == len) call_again_soon = 1; cbuf_add(&con->cb, ret); @@ -381,24 +354,26 @@ static int receive_from_sock(struct connection *con) con->rx_page = NULL; } -out: if (call_again_soon) goto out_resched; - up_read(&con->sock_sem); + mutex_unlock(&con->sock_mutex); return 0; out_resched: - lowcomms_data_ready(con->sock->sk, 0); - up_read(&con->sock_sem); - cond_resched(); - return 0; + if (!test_and_set_bit(CF_READ_PENDING, &con->flags)) + queue_work(recv_workqueue, &con->rwork); + mutex_unlock(&con->sock_mutex); + return -EAGAIN; out_close: - up_read(&con->sock_sem); + mutex_unlock(&con->sock_mutex); if (ret != -EAGAIN && !test_bit(CF_IS_OTHERCON, &con->flags)) { close_connection(con, false); /* Reconnect when there is something to send */ } + /* Don't return success if we really got EOF */ + if (ret == 0) + ret = -EAGAIN; return ret; } @@ -412,6 +387,7 @@ static int accept_from_sock(struct connection *con) int len; int nodeid; struct connection *newcon; + struct connection *addcon; memset(&peeraddr, 0, sizeof(peeraddr)); result = sock_create_kern(dlm_local_addr.ss_family, SOCK_STREAM, @@ -419,7 +395,7 @@ static int accept_from_sock(struct connection *con) if (result < 0) return -ENOMEM; - down_read(&con->sock_sem); + mutex_lock_nested(&con->sock_mutex, 0); result = -ENOTCONN; if (con->sock == NULL) @@ -445,7 +421,7 @@ static int accept_from_sock(struct connection *con) if (dlm_addr_to_nodeid(&peeraddr, &nodeid)) { printk("dlm: connect from non cluster node\n"); sock_release(newsock); - up_read(&con->sock_sem); + mutex_unlock(&con->sock_mutex); return -1; } @@ -462,7 +438,7 @@ static int accept_from_sock(struct connection *con) result = -ENOMEM; goto accept_err; } - down_write(&newcon->sock_sem); + mutex_lock_nested(&newcon->sock_mutex, 1); if (newcon->sock) { struct connection *othercon = newcon->othercon; @@ -470,41 +446,45 @@ static int accept_from_sock(struct connection *con) othercon = kmem_cache_zalloc(con_cache, GFP_KERNEL); if (!othercon) { printk("dlm: failed to allocate incoming socket\n"); - up_write(&newcon->sock_sem); + mutex_unlock(&newcon->sock_mutex); result = -ENOMEM; goto accept_err; } othercon->nodeid = nodeid; othercon->rx_action = receive_from_sock; - init_rwsem(&othercon->sock_sem); + mutex_init(&othercon->sock_mutex); + INIT_WORK(&othercon->swork, process_send_sockets); + INIT_WORK(&othercon->rwork, process_recv_sockets); set_bit(CF_IS_OTHERCON, &othercon->flags); newcon->othercon = othercon; } othercon->sock = newsock; newsock->sk->sk_user_data = othercon; add_sock(newsock, othercon); + addcon = othercon; } else { newsock->sk->sk_user_data = newcon; newcon->rx_action = receive_from_sock; add_sock(newsock, newcon); - + addcon = newcon; } - up_write(&newcon->sock_sem); + mutex_unlock(&newcon->sock_mutex); /* * Add it to the active queue in case we got data * beween processing the accept adding the socket * to the read_sockets list */ - lowcomms_data_ready(newsock->sk, 0); - up_read(&con->sock_sem); + if (!test_and_set_bit(CF_READ_PENDING, &addcon->flags)) + queue_work(recv_workqueue, &addcon->rwork); + mutex_unlock(&con->sock_mutex); return 0; accept_err: - up_read(&con->sock_sem); + mutex_unlock(&con->sock_mutex); sock_release(newsock); if (result != -EAGAIN) @@ -525,7 +505,7 @@ static void connect_to_sock(struct connection *con) return; } - down_write(&con->sock_sem); + mutex_lock(&con->sock_mutex); if (con->retries++ > MAX_CONNECT_RETRIES) goto out; @@ -548,7 +528,7 @@ static void connect_to_sock(struct connection *con) sock->sk->sk_user_data = con; con->rx_action = receive_from_sock; - make_sockaddr(&saddr, dlm_config.tcp_port, &addr_len); + make_sockaddr(&saddr, dlm_config.ci_tcp_port, &addr_len); add_sock(sock, con); @@ -577,7 +557,7 @@ out_err: result = 0; } out: - up_write(&con->sock_sem); + mutex_unlock(&con->sock_mutex); return; } @@ -616,10 +596,10 @@ static struct socket *create_listen_sock(struct connection *con, con->sock = sock; /* Bind to our port */ - make_sockaddr(saddr, dlm_config.tcp_port, &addr_len); + make_sockaddr(saddr, dlm_config.ci_tcp_port, &addr_len); result = sock->ops->bind(sock, (struct sockaddr *) saddr, addr_len); if (result < 0) { - printk("dlm: Can't bind to port %d\n", dlm_config.tcp_port); + printk("dlm: Can't bind to port %d\n", dlm_config.ci_tcp_port); sock_release(sock); sock = NULL; con->sock = NULL; @@ -638,7 +618,7 @@ static struct socket *create_listen_sock(struct connection *con, result = sock->ops->listen(sock, 5); if (result < 0) { - printk("dlm: Can't listen on port %d\n", dlm_config.tcp_port); + printk("dlm: Can't listen on port %d\n", dlm_config.ci_tcp_port); sock_release(sock); sock = NULL; goto create_out; @@ -709,6 +689,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, if (!con) return NULL; + spin_lock(&con->writequeue_lock); e = list_entry(con->writequeue.prev, struct writequeue_entry, list); if ((&e->list == &con->writequeue) || (PAGE_CACHE_SIZE - e->end < len)) { @@ -747,6 +728,7 @@ void dlm_lowcomms_commit_buffer(void *mh) struct connection *con = e->con; int users; + spin_lock(&con->writequeue_lock); users = --e->users; if (users) goto out; @@ -754,12 +736,8 @@ void dlm_lowcomms_commit_buffer(void *mh) kunmap(e->page); spin_unlock(&con->writequeue_lock); - if (test_and_set_bit(CF_WRITE_PENDING, &con->flags) == 0) { - spin_lock_bh(&write_sockets_lock); - list_add_tail(&con->write_list, &write_sockets); - spin_unlock_bh(&write_sockets_lock); - - wake_up_interruptible(&lowcomms_send_waitq); + if (!test_and_set_bit(CF_WRITE_PENDING, &con->flags)) { + queue_work(send_workqueue, &con->swork); } return; @@ -783,7 +761,7 @@ static void send_to_sock(struct connection *con) struct writequeue_entry *e; int len, offset; - down_read(&con->sock_sem); + mutex_lock(&con->sock_mutex); if (con->sock == NULL) goto out_connect; @@ -800,6 +778,7 @@ static void send_to_sock(struct connection *con) offset = e->offset; BUG_ON(len == 0 && e->users == 0); spin_unlock(&con->writequeue_lock); + kmap(e->page); ret = 0; if (len) { @@ -828,18 +807,18 @@ static void send_to_sock(struct connection *con) } spin_unlock(&con->writequeue_lock); out: - up_read(&con->sock_sem); + mutex_unlock(&con->sock_mutex); return; send_error: - up_read(&con->sock_sem); + mutex_unlock(&con->sock_mutex); close_connection(con, false); lowcomms_connect_sock(con); return; out_connect: - up_read(&con->sock_sem); - lowcomms_connect_sock(con); + mutex_unlock(&con->sock_mutex); + connect_to_sock(con); return; } @@ -872,7 +851,6 @@ int dlm_lowcomms_close(int nodeid) if (con) { clean_one_writequeue(con); close_connection(con, true); - atomic_set(&con->waiting_requests, 0); } return 0; @@ -880,102 +858,29 @@ out: return -1; } -/* API send message call, may queue the request */ -/* N.B. This is the old interface - use the new one for new calls */ -int lowcomms_send_message(int nodeid, char *buf, int len, gfp_t allocation) -{ - struct writequeue_entry *e; - char *b; - - e = dlm_lowcomms_get_buffer(nodeid, len, allocation, &b); - if (e) { - memcpy(b, buf, len); - dlm_lowcomms_commit_buffer(e); - return 0; - } - return -ENOBUFS; -} - /* Look for activity on active sockets */ -static void process_sockets(void) +static void process_recv_sockets(struct work_struct *work) { - struct list_head *list; - struct list_head *temp; - int count = 0; - - spin_lock_bh(&read_sockets_lock); - list_for_each_safe(list, temp, &read_sockets) { + struct connection *con = container_of(work, struct connection, rwork); + int err; - struct connection *con = - list_entry(list, struct connection, read_list); - list_del(&con->read_list); - clear_bit(CF_READ_PENDING, &con->flags); - - spin_unlock_bh(&read_sockets_lock); - - /* This can reach zero if we are processing requests - * as they come in. - */ - if (atomic_read(&con->waiting_requests) == 0) { - spin_lock_bh(&read_sockets_lock); - continue; - } - - do { - con->rx_action(con); - - /* Don't starve out everyone else */ - if (++count >= MAX_RX_MSG_COUNT) { - cond_resched(); - count = 0; - } - - } while (!atomic_dec_and_test(&con->waiting_requests) && - !kthread_should_stop()); - - spin_lock_bh(&read_sockets_lock); - } - spin_unlock_bh(&read_sockets_lock); + clear_bit(CF_READ_PENDING, &con->flags); + do { + err = con->rx_action(con); + } while (!err); } -/* Try to send any messages that are pending - */ -static void process_output_queue(void) -{ - struct list_head *list; - struct list_head *temp; - - spin_lock_bh(&write_sockets_lock); - list_for_each_safe(list, temp, &write_sockets) { - struct connection *con = - list_entry(list, struct connection, write_list); - clear_bit(CF_WRITE_PENDING, &con->flags); - list_del(&con->write_list); - - spin_unlock_bh(&write_sockets_lock); - send_to_sock(con); - spin_lock_bh(&write_sockets_lock); - } - spin_unlock_bh(&write_sockets_lock); -} -static void process_state_queue(void) +static void process_send_sockets(struct work_struct *work) { - struct list_head *list; - struct list_head *temp; - - spin_lock_bh(&state_sockets_lock); - list_for_each_safe(list, temp, &state_sockets) { - struct connection *con = - list_entry(list, struct connection, state_list); - list_del(&con->state_list); - clear_bit(CF_CONNECT_PENDING, &con->flags); - spin_unlock_bh(&state_sockets_lock); + struct connection *con = container_of(work, struct connection, swork); + if (test_and_clear_bit(CF_CONNECT_PENDING, &con->flags)) { connect_to_sock(con); - spin_lock_bh(&state_sockets_lock); } - spin_unlock_bh(&state_sockets_lock); + + clear_bit(CF_WRITE_PENDING, &con->flags); + send_to_sock(con); } @@ -992,109 +897,33 @@ static void clean_writequeues(void) } } -static int read_list_empty(void) +static void work_stop(void) { - int status; - - spin_lock_bh(&read_sockets_lock); - status = list_empty(&read_sockets); - spin_unlock_bh(&read_sockets_lock); - - return status; -} - -/* DLM Transport comms receive daemon */ -static int dlm_recvd(void *data) -{ - init_waitqueue_entry(&lowcomms_recv_waitq_head, current); - add_wait_queue(&lowcomms_recv_waitq, &lowcomms_recv_waitq_head); - - while (!kthread_should_stop()) { - set_current_state(TASK_INTERRUPTIBLE); - if (read_list_empty()) - cond_resched(); - set_current_state(TASK_RUNNING); - - process_sockets(); - } - - return 0; + destroy_workqueue(recv_workqueue); + destroy_workqueue(send_workqueue); } -static int write_and_state_lists_empty(void) +static int work_start(void) { - int status; - - spin_lock_bh(&write_sockets_lock); - status = list_empty(&write_sockets); - spin_unlock_bh(&write_sockets_lock); - - spin_lock_bh(&state_sockets_lock); - if (list_empty(&state_sockets) == 0) - status = 0; - spin_unlock_bh(&state_sockets_lock); - - return status; -} - -/* DLM Transport send daemon */ -static int dlm_sendd(void *data) -{ - init_waitqueue_entry(&lowcomms_send_waitq_head, current); - add_wait_queue(&lowcomms_send_waitq, &lowcomms_send_waitq_head); - - while (!kthread_should_stop()) { - set_current_state(TASK_INTERRUPTIBLE); - if (write_and_state_lists_empty()) - cond_resched(); - set_current_state(TASK_RUNNING); - - process_state_queue(); - process_output_queue(); - } - - return 0; -} - -static void daemons_stop(void) -{ - kthread_stop(recv_task); - kthread_stop(send_task); -} - -static int daemons_start(void) -{ - struct task_struct *p; int error; - - p = kthread_run(dlm_recvd, NULL, "dlm_recvd"); - error = IS_ERR(p); + recv_workqueue = create_workqueue("dlm_recv"); + error = IS_ERR(recv_workqueue); if (error) { - log_print("can't start dlm_recvd %d", error); + log_print("can't start dlm_recv %d", error); return error; } - recv_task = p; - p = kthread_run(dlm_sendd, NULL, "dlm_sendd"); - error = IS_ERR(p); + send_workqueue = create_singlethread_workqueue("dlm_send"); + error = IS_ERR(send_workqueue); if (error) { - log_print("can't start dlm_sendd %d", error); - kthread_stop(recv_task); + log_print("can't start dlm_send %d", error); + destroy_workqueue(recv_workqueue); return error; } - send_task = p; return 0; } -/* - * Return the largest buffer size we can cope with. - */ -int lowcomms_max_buffer_size(void) -{ - return PAGE_CACHE_SIZE; -} - void dlm_lowcomms_stop(void) { int i; @@ -1107,7 +936,7 @@ void dlm_lowcomms_stop(void) connections[i]->flags |= 0xFF; } - daemons_stop(); + work_stop(); clean_writequeues(); for (i = 0; i < conn_array_size; i++) { @@ -1159,7 +988,7 @@ int dlm_lowcomms_start(void) if (error) goto fail_unlisten; - error = daemons_start(); + error = work_start(); if (error) goto fail_unlisten; diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c index c9b1c3d535f4..a5126e0c68a6 100644 --- a/fs/dlm/midcomms.c +++ b/fs/dlm/midcomms.c @@ -82,7 +82,7 @@ int dlm_process_incoming_buffer(int nodeid, const void *base, if (msglen < sizeof(struct dlm_header)) break; err = -E2BIG; - if (msglen > dlm_config.buffer_size) { + if (msglen > dlm_config.ci_buffer_size) { log_print("message size %d from %d too big, buf len %d", msglen, nodeid, len); break; @@ -103,7 +103,7 @@ int dlm_process_incoming_buffer(int nodeid, const void *base, if (msglen > sizeof(__tmp) && msg == (struct dlm_header *) __tmp) { - msg = kmalloc(dlm_config.buffer_size, GFP_KERNEL); + msg = kmalloc(dlm_config.ci_buffer_size, GFP_KERNEL); if (msg == NULL) return ret; } diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c index 4cc31be9cd9d..6bfbd6153809 100644 --- a/fs/dlm/rcom.c +++ b/fs/dlm/rcom.c @@ -56,6 +56,10 @@ static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len, rc->rc_type = type; + spin_lock(&ls->ls_recover_lock); + rc->rc_seq = ls->ls_recover_seq; + spin_unlock(&ls->ls_recover_lock); + *mh_ret = mh; *rc_ret = rc; return 0; @@ -78,8 +82,17 @@ static void make_config(struct dlm_ls *ls, struct rcom_config *rf) rf->rf_lsflags = ls->ls_exflags; } -static int check_config(struct dlm_ls *ls, struct rcom_config *rf, int nodeid) +static int check_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid) { + struct rcom_config *rf = (struct rcom_config *) rc->rc_buf; + + if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) { + log_error(ls, "version mismatch: %x nodeid %d: %x", + DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid, + rc->rc_header.h_version); + return -EINVAL; + } + if (rf->rf_lvblen != ls->ls_lvblen || rf->rf_lsflags != ls->ls_exflags) { log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x", @@ -125,7 +138,7 @@ int dlm_rcom_status(struct dlm_ls *ls, int nodeid) goto out; allow_sync_reply(ls, &rc->rc_id); - memset(ls->ls_recover_buf, 0, dlm_config.buffer_size); + memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size); send_rcom(ls, mh, rc); @@ -141,8 +154,7 @@ int dlm_rcom_status(struct dlm_ls *ls, int nodeid) log_debug(ls, "remote node %d not ready", nodeid); rc->rc_result = 0; } else - error = check_config(ls, (struct rcom_config *) rc->rc_buf, - nodeid); + error = check_config(ls, rc, nodeid); /* the caller looks at rc_result for the remote recovery status */ out: return error; @@ -159,6 +171,7 @@ static void receive_rcom_status(struct dlm_ls *ls, struct dlm_rcom *rc_in) if (error) return; rc->rc_id = rc_in->rc_id; + rc->rc_seq_reply = rc_in->rc_seq; rc->rc_result = dlm_recover_status(ls); make_config(ls, (struct rcom_config *) rc->rc_buf); @@ -200,7 +213,7 @@ int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len) if (nodeid == dlm_our_nodeid()) { dlm_copy_master_names(ls, last_name, last_len, ls->ls_recover_buf + len, - dlm_config.buffer_size - len, nodeid); + dlm_config.ci_buffer_size - len, nodeid); goto out; } @@ -210,7 +223,7 @@ int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len) memcpy(rc->rc_buf, last_name, last_len); allow_sync_reply(ls, &rc->rc_id); - memset(ls->ls_recover_buf, 0, dlm_config.buffer_size); + memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size); send_rcom(ls, mh, rc); @@ -224,30 +237,17 @@ static void receive_rcom_names(struct dlm_ls *ls, struct dlm_rcom *rc_in) { struct dlm_rcom *rc; struct dlm_mhandle *mh; - int error, inlen, outlen; - int nodeid = rc_in->rc_header.h_nodeid; - uint32_t status = dlm_recover_status(ls); - - /* - * We can't run dlm_dir_rebuild_send (which uses ls_nodes) while - * dlm_recoverd is running ls_nodes_reconfig (which changes ls_nodes). - * It could only happen in rare cases where we get a late NAMES - * message from a previous instance of recovery. - */ - - if (!(status & DLM_RS_NODES)) { - log_debug(ls, "ignoring RCOM_NAMES from %u", nodeid); - return; - } + int error, inlen, outlen, nodeid; nodeid = rc_in->rc_header.h_nodeid; inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom); - outlen = dlm_config.buffer_size - sizeof(struct dlm_rcom); + outlen = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom); error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen, &rc, &mh); if (error) return; rc->rc_id = rc_in->rc_id; + rc->rc_seq_reply = rc_in->rc_seq; dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen, nodeid); @@ -294,6 +294,7 @@ static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in) ret_nodeid = error; rc->rc_result = ret_nodeid; rc->rc_id = rc_in->rc_id; + rc->rc_seq_reply = rc_in->rc_seq; send_rcom(ls, mh, rc); } @@ -375,20 +376,13 @@ static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in) memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock)); rc->rc_id = rc_in->rc_id; + rc->rc_seq_reply = rc_in->rc_seq; send_rcom(ls, mh, rc); } static void receive_rcom_lock_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in) { - uint32_t status = dlm_recover_status(ls); - - if (!(status & DLM_RS_DIR)) { - log_debug(ls, "ignoring RCOM_LOCK_REPLY from %u", - rc_in->rc_header.h_nodeid); - return; - } - dlm_recover_process_copy(ls, rc_in); } @@ -415,6 +409,7 @@ static int send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in) rc->rc_type = DLM_RCOM_STATUS_REPLY; rc->rc_id = rc_in->rc_id; + rc->rc_seq_reply = rc_in->rc_seq; rc->rc_result = -ESRCH; rf = (struct rcom_config *) rc->rc_buf; @@ -426,6 +421,31 @@ static int send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in) return 0; } +static int is_old_reply(struct dlm_ls *ls, struct dlm_rcom *rc) +{ + uint64_t seq; + int rv = 0; + + switch (rc->rc_type) { + case DLM_RCOM_STATUS_REPLY: + case DLM_RCOM_NAMES_REPLY: + case DLM_RCOM_LOOKUP_REPLY: + case DLM_RCOM_LOCK_REPLY: + spin_lock(&ls->ls_recover_lock); + seq = ls->ls_recover_seq; + spin_unlock(&ls->ls_recover_lock); + if (rc->rc_seq_reply != seq) { + log_debug(ls, "ignoring old reply %x from %d " + "seq_reply %llx expect %llx", + rc->rc_type, rc->rc_header.h_nodeid, + (unsigned long long)rc->rc_seq_reply, + (unsigned long long)seq); + rv = 1; + } + } + return rv; +} + /* Called by dlm_recvd; corresponds to dlm_receive_message() but special recovery-only comms are sent through here. */ @@ -449,11 +469,14 @@ void dlm_receive_rcom(struct dlm_header *hd, int nodeid) } if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) { - log_error(ls, "ignoring recovery message %x from %d", + log_debug(ls, "ignoring recovery message %x from %d", rc->rc_type, nodeid); goto out; } + if (is_old_reply(ls, rc)) + goto out; + if (nodeid != rc->rc_header.h_nodeid) { log_error(ls, "bad rcom nodeid %d from %d", rc->rc_header.h_nodeid, nodeid); diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c index cf9f6831bab5..c2cc7694cd16 100644 --- a/fs/dlm/recover.c +++ b/fs/dlm/recover.c @@ -44,7 +44,7 @@ static void dlm_wait_timer_fn(unsigned long data) { struct dlm_ls *ls = (struct dlm_ls *) data; - mod_timer(&ls->ls_timer, jiffies + (dlm_config.recover_timer * HZ)); + mod_timer(&ls->ls_timer, jiffies + (dlm_config.ci_recover_timer * HZ)); wake_up(&ls->ls_wait_general); } @@ -55,7 +55,7 @@ int dlm_wait_function(struct dlm_ls *ls, int (*testfn) (struct dlm_ls *ls)) init_timer(&ls->ls_timer); ls->ls_timer.function = dlm_wait_timer_fn; ls->ls_timer.data = (long) ls; - ls->ls_timer.expires = jiffies + (dlm_config.recover_timer * HZ); + ls->ls_timer.expires = jiffies + (dlm_config.ci_recover_timer * HZ); add_timer(&ls->ls_timer); wait_event(ls->ls_wait_general, testfn(ls) || dlm_recovery_stopped(ls)); @@ -397,7 +397,9 @@ int dlm_recover_masters(struct dlm_ls *ls) if (dlm_no_directory(ls)) count += recover_master_static(r); - else if (!is_master(r) && dlm_is_removed(ls, r->res_nodeid)) { + else if (!is_master(r) && + (dlm_is_removed(ls, r->res_nodeid) || + rsb_flag(r, RSB_NEW_MASTER))) { recover_master(r); count++; } diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c index 650536aa5139..3cb636d60249 100644 --- a/fs/dlm/recoverd.c +++ b/fs/dlm/recoverd.c @@ -77,7 +77,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = dlm_recover_members(ls, rv, &neg); if (error) { - log_error(ls, "recover_members failed %d", error); + log_debug(ls, "recover_members failed %d", error); goto fail; } start = jiffies; @@ -89,7 +89,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = dlm_recover_directory(ls); if (error) { - log_error(ls, "recover_directory failed %d", error); + log_debug(ls, "recover_directory failed %d", error); goto fail; } @@ -99,7 +99,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = dlm_recover_directory_wait(ls); if (error) { - log_error(ls, "recover_directory_wait failed %d", error); + log_debug(ls, "recover_directory_wait failed %d", error); goto fail; } @@ -129,7 +129,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = dlm_recover_masters(ls); if (error) { - log_error(ls, "recover_masters failed %d", error); + log_debug(ls, "recover_masters failed %d", error); goto fail; } @@ -139,13 +139,13 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = dlm_recover_locks(ls); if (error) { - log_error(ls, "recover_locks failed %d", error); + log_debug(ls, "recover_locks failed %d", error); goto fail; } error = dlm_recover_locks_wait(ls); if (error) { - log_error(ls, "recover_locks_wait failed %d", error); + log_debug(ls, "recover_locks_wait failed %d", error); goto fail; } @@ -166,7 +166,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = dlm_recover_locks_wait(ls); if (error) { - log_error(ls, "recover_locks_wait failed %d", error); + log_debug(ls, "recover_locks_wait failed %d", error); goto fail; } } @@ -184,7 +184,7 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) dlm_set_recover_status(ls, DLM_RS_DONE); error = dlm_recover_done_wait(ls); if (error) { - log_error(ls, "recover_done_wait failed %d", error); + log_debug(ls, "recover_done_wait failed %d", error); goto fail; } @@ -192,19 +192,19 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv) error = enable_locking(ls, rv->seq); if (error) { - log_error(ls, "enable_locking failed %d", error); + log_debug(ls, "enable_locking failed %d", error); goto fail; } error = dlm_process_requestqueue(ls); if (error) { - log_error(ls, "process_requestqueue failed %d", error); + log_debug(ls, "process_requestqueue failed %d", error); goto fail; } error = dlm_recover_waiters_post(ls); if (error) { - log_error(ls, "recover_waiters_post failed %d", error); + log_debug(ls, "recover_waiters_post failed %d", error); goto fail; } diff --git a/fs/dlm/user.c b/fs/dlm/user.c index c37e93e4f2df..d378b7fe2a1e 100644 --- a/fs/dlm/user.c +++ b/fs/dlm/user.c @@ -180,6 +180,14 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type) ua->lksb.sb_status == -EAGAIN && !list_empty(&lkb->lkb_ownqueue)) remove_ownqueue = 1; + /* unlocks or cancels of waiting requests need to be removed from the + proc's unlocking list, again there must be a better way... */ + + if (ua->lksb.sb_status == -DLM_EUNLOCK || + (ua->lksb.sb_status == -DLM_ECANCEL && + lkb->lkb_grmode == DLM_LOCK_IV)) + remove_ownqueue = 1; + /* We want to copy the lvb to userspace when the completion ast is read if the status is 0, the lock has an lvb and lvb_ops says we should. We could probably have set_lvb_lock() @@ -523,6 +531,7 @@ static int device_open(struct inode *inode, struct file *file) proc->lockspace = ls->ls_local_handle; INIT_LIST_HEAD(&proc->asts); INIT_LIST_HEAD(&proc->locks); + INIT_LIST_HEAD(&proc->unlocking); spin_lock_init(&proc->asts_spin); spin_lock_init(&proc->locks_spin); init_waitqueue_head(&proc->wait); diff --git a/fs/dlm/util.c b/fs/dlm/util.c index 767197db9944..963889cf6740 100644 --- a/fs/dlm/util.c +++ b/fs/dlm/util.c @@ -134,6 +134,8 @@ void dlm_rcom_out(struct dlm_rcom *rc) rc->rc_type = cpu_to_le32(rc->rc_type); rc->rc_result = cpu_to_le32(rc->rc_result); rc->rc_id = cpu_to_le64(rc->rc_id); + rc->rc_seq = cpu_to_le64(rc->rc_seq); + rc->rc_seq_reply = cpu_to_le64(rc->rc_seq_reply); if (type == DLM_RCOM_LOCK) rcom_lock_out((struct rcom_lock *) rc->rc_buf); @@ -151,6 +153,8 @@ void dlm_rcom_in(struct dlm_rcom *rc) rc->rc_type = le32_to_cpu(rc->rc_type); rc->rc_result = le32_to_cpu(rc->rc_result); rc->rc_id = le64_to_cpu(rc->rc_id); + rc->rc_seq = le64_to_cpu(rc->rc_seq); + rc->rc_seq_reply = le64_to_cpu(rc->rc_seq_reply); if (rc->rc_type == DLM_RCOM_LOCK) rcom_lock_in((struct rcom_lock *) rc->rc_buf); diff --git a/fs/gfs2/Kconfig b/fs/gfs2/Kconfig index 6a2ffa2db14f..de8e64c03f73 100644 --- a/fs/gfs2/Kconfig +++ b/fs/gfs2/Kconfig @@ -4,44 +4,43 @@ config GFS2_FS select FS_POSIX_ACL select CRC32 help - A cluster filesystem. + A cluster filesystem. - Allows a cluster of computers to simultaneously use a block device - that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads - and writes to the block device like a local filesystem, but also uses - a lock module to allow the computers coordinate their I/O so - filesystem consistency is maintained. One of the nifty features of - GFS is perfect consistency -- changes made to the filesystem on one - machine show up immediately on all other machines in the cluster. + Allows a cluster of computers to simultaneously use a block device + that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads + and writes to the block device like a local filesystem, but also uses + a lock module to allow the computers coordinate their I/O so + filesystem consistency is maintained. One of the nifty features of + GFS is perfect consistency -- changes made to the filesystem on one + machine show up immediately on all other machines in the cluster. - To use the GFS2 filesystem, you will need to enable one or more of - the below locking modules. Documentation and utilities for GFS2 can - be found here: http://sources.redhat.com/cluster + To use the GFS2 filesystem, you will need to enable one or more of + the below locking modules. Documentation and utilities for GFS2 can + be found here: http://sources.redhat.com/cluster config GFS2_FS_LOCKING_NOLOCK tristate "GFS2 \"nolock\" locking module" depends on GFS2_FS help - Single node locking module for GFS2. + Single node locking module for GFS2. - Use this module if you want to use GFS2 on a single node without - its clustering features. You can still take advantage of the - large file support, and upgrade to running a full cluster later on - if required. + Use this module if you want to use GFS2 on a single node without + its clustering features. You can still take advantage of the + large file support, and upgrade to running a full cluster later on + if required. - If you will only be using GFS2 in cluster mode, you do not need this - module. + If you will only be using GFS2 in cluster mode, you do not need this + module. config GFS2_FS_LOCKING_DLM tristate "GFS2 DLM locking module" - depends on GFS2_FS && NET && INET && (IPV6 || IPV6=n) + depends on GFS2_FS && SYSFS && NET && INET && (IPV6 || IPV6=n) select IP_SCTP if DLM_SCTP select CONFIGFS_FS select DLM help - Multiple node locking module for GFS2 - - Most users of GFS2 will require this module. It provides the locking - interface between GFS2 and the DLM, which is required to use GFS2 - in a cluster environment. + Multiple node locking module for GFS2 + Most users of GFS2 will require this module. It provides the locking + interface between GFS2 and the DLM, which is required to use GFS2 + in a cluster environment. diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 8240c1ff94f4..113f6c9110c7 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -773,7 +773,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh, gfs2_free_data(ip, bstart, blen); } - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_dinode_out(ip, dibh->b_data); @@ -848,7 +848,7 @@ static int do_grow(struct gfs2_inode *ip, u64 size) } ip->i_di.di_size = size; - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; error = gfs2_meta_inode_buffer(ip, &dibh); if (error) @@ -963,7 +963,7 @@ static int trunc_start(struct gfs2_inode *ip, u64 size) if (gfs2_is_stuffed(ip)) { ip->i_di.di_size = size; - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode) + size); @@ -975,7 +975,7 @@ static int trunc_start(struct gfs2_inode *ip, u64 size) if (!error) { ip->i_di.di_size = size; - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; ip->i_di.di_flags |= GFS2_DIF_TRUNC_IN_PROG; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); @@ -1048,7 +1048,7 @@ static int trunc_end(struct gfs2_inode *ip) ip->i_num.no_addr; gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); } - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; ip->i_di.di_flags &= ~GFS2_DIF_TRUNC_IN_PROG; gfs2_trans_add_bh(ip->i_gl, dibh, 1); diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 0fdcb7713cd9..c93ca8f361b5 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -131,7 +131,7 @@ static int gfs2_dir_write_stuffed(struct gfs2_inode *ip, const char *buf, memcpy(dibh->b_data + offset + sizeof(struct gfs2_dinode), buf, size); if (ip->i_di.di_size < offset + size) ip->i_di.di_size = offset + size; - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); @@ -229,7 +229,7 @@ out: if (ip->i_di.di_size < offset + copied) ip->i_di.di_size = offset + copied; - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); @@ -1198,12 +1198,11 @@ static int compare_dents(const void *a, const void *b) */ static int do_filldir_main(struct gfs2_inode *dip, u64 *offset, - void *opaque, gfs2_filldir_t filldir, + void *opaque, filldir_t filldir, const struct gfs2_dirent **darr, u32 entries, int *copied) { const struct gfs2_dirent *dent, *dent_next; - struct gfs2_inum_host inum; u64 off, off_next; unsigned int x, y; int run = 0; @@ -1240,11 +1239,9 @@ static int do_filldir_main(struct gfs2_inode *dip, u64 *offset, *offset = off; } - gfs2_inum_in(&inum, (char *)&dent->de_inum); - error = filldir(opaque, (const char *)(dent + 1), be16_to_cpu(dent->de_name_len), - off, &inum, + off, be64_to_cpu(dent->de_inum.no_addr), be16_to_cpu(dent->de_type)); if (error) return 1; @@ -1262,8 +1259,8 @@ static int do_filldir_main(struct gfs2_inode *dip, u64 *offset, } static int gfs2_dir_read_leaf(struct inode *inode, u64 *offset, void *opaque, - gfs2_filldir_t filldir, int *copied, - unsigned *depth, u64 leaf_no) + filldir_t filldir, int *copied, unsigned *depth, + u64 leaf_no) { struct gfs2_inode *ip = GFS2_I(inode); struct buffer_head *bh; @@ -1343,7 +1340,7 @@ out: */ static int dir_e_read(struct inode *inode, u64 *offset, void *opaque, - gfs2_filldir_t filldir) + filldir_t filldir) { struct gfs2_inode *dip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); @@ -1402,7 +1399,7 @@ out: } int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque, - gfs2_filldir_t filldir) + filldir_t filldir) { struct gfs2_inode *dip = GFS2_I(inode); struct dirent_gather g; @@ -1568,7 +1565,7 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name, break; gfs2_trans_add_bh(ip->i_gl, bh, 1); ip->i_di.di_entries++; - ip->i_inode.i_mtime.tv_sec = ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_dinode_out(ip, bh->b_data); brelse(bh); error = 0; @@ -1654,7 +1651,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name) gfs2_consist_inode(dip); gfs2_trans_add_bh(dip->i_gl, bh, 1); dip->i_di.di_entries--; - dip->i_inode.i_mtime.tv_sec = dip->i_inode.i_ctime.tv_sec = get_seconds(); + dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_dinode_out(dip, bh->b_data); brelse(bh); mark_inode_dirty(&dip->i_inode); @@ -1702,7 +1699,7 @@ int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename, gfs2_trans_add_bh(dip->i_gl, bh, 1); } - dip->i_inode.i_mtime.tv_sec = dip->i_inode.i_ctime.tv_sec = get_seconds(); + dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_dinode_out(dip, bh->b_data); brelse(bh); return 0; diff --git a/fs/gfs2/dir.h b/fs/gfs2/dir.h index b21b33668a5b..48fe89046bba 100644 --- a/fs/gfs2/dir.h +++ b/fs/gfs2/dir.h @@ -16,30 +16,13 @@ struct inode; struct gfs2_inode; struct gfs2_inum; -/** - * gfs2_filldir_t - Report a directory entry to the caller of gfs2_dir_read() - * @opaque: opaque data used by the function - * @name: the name of the directory entry - * @length: the length of the name - * @offset: the entry's offset in the directory - * @inum: the inode number the entry points to - * @type: the type of inode the entry points to - * - * Returns: 0 on success, 1 if buffer full - */ - -typedef int (*gfs2_filldir_t) (void *opaque, - const char *name, unsigned int length, - u64 offset, - struct gfs2_inum_host *inum, unsigned int type); - int gfs2_dir_search(struct inode *dir, const struct qstr *filename, struct gfs2_inum_host *inum, unsigned int *type); int gfs2_dir_add(struct inode *inode, const struct qstr *filename, const struct gfs2_inum_host *inum, unsigned int type); int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename); -int gfs2_dir_read(struct inode *inode, u64 * offset, void *opaque, - gfs2_filldir_t filldir); +int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque, + filldir_t filldir); int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename, struct gfs2_inum_host *new_inum, unsigned int new_type); diff --git a/fs/gfs2/eattr.c b/fs/gfs2/eattr.c index ebebbdcd7057..0c83c7f4dda8 100644 --- a/fs/gfs2/eattr.c +++ b/fs/gfs2/eattr.c @@ -301,7 +301,7 @@ static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, error = gfs2_meta_inode_buffer(ip, &dibh); if (!error) { - ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); @@ -718,7 +718,7 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, (er->er_mode & S_IFMT)); ip->i_inode.i_mode = er->er_mode; } - ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); @@ -853,7 +853,7 @@ static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, (ip->i_inode.i_mode & S_IFMT) == (er->er_mode & S_IFMT)); ip->i_inode.i_mode = er->er_mode; } - ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); @@ -1134,7 +1134,7 @@ static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) error = gfs2_meta_inode_buffer(ip, &dibh); if (!error) { - ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 438146904b58..6618c1190252 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -19,6 +19,8 @@ #include <linux/gfs2_ondisk.h> #include <linux/list.h> #include <linux/lm_interface.h> +#include <linux/wait.h> +#include <linux/rwsem.h> #include <asm/uaccess.h> #include "gfs2.h" @@ -33,11 +35,6 @@ #include "super.h" #include "util.h" -struct greedy { - struct gfs2_holder gr_gh; - struct delayed_work gr_work; -}; - struct gfs2_gl_hash_bucket { struct hlist_head hb_list; }; @@ -47,6 +44,9 @@ typedef void (*glock_examiner) (struct gfs2_glock * gl); static int gfs2_dump_lockstate(struct gfs2_sbd *sdp); static int dump_glock(struct gfs2_glock *gl); static int dump_inode(struct gfs2_inode *ip); +static void gfs2_glock_xmote_th(struct gfs2_holder *gh); +static void gfs2_glock_drop_th(struct gfs2_glock *gl); +static DECLARE_RWSEM(gfs2_umount_flush_sem); #define GFS2_GL_HASH_SHIFT 15 #define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT) @@ -213,30 +213,6 @@ out: } /** - * queue_empty - check to see if a glock's queue is empty - * @gl: the glock - * @head: the head of the queue to check - * - * This function protects the list in the event that a process already - * has a holder on the list and is adding a second holder for itself. - * The glmutex lock is what generally prevents processes from working - * on the same glock at once, but the special case of adding a second - * holder for yourself ("recursive" locking) doesn't involve locking - * glmutex, making the spin lock necessary. - * - * Returns: 1 if the queue is empty - */ - -static inline int queue_empty(struct gfs2_glock *gl, struct list_head *head) -{ - int empty; - spin_lock(&gl->gl_spin); - empty = list_empty(head); - spin_unlock(&gl->gl_spin); - return empty; -} - -/** * search_bucket() - Find struct gfs2_glock by lock number * @bucket: the bucket to search * @name: The lock name @@ -395,11 +371,6 @@ void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags, gh->gh_flags = flags; gh->gh_error = 0; gh->gh_iflags = 0; - init_completion(&gh->gh_wait); - - if (gh->gh_state == LM_ST_EXCLUSIVE) - gh->gh_flags |= GL_LOCAL_EXCL; - gfs2_glock_hold(gl); } @@ -417,9 +388,6 @@ void gfs2_holder_reinit(unsigned int state, unsigned flags, struct gfs2_holder * { gh->gh_state = state; gh->gh_flags = flags; - if (gh->gh_state == LM_ST_EXCLUSIVE) - gh->gh_flags |= GL_LOCAL_EXCL; - gh->gh_iflags &= 1 << HIF_ALLOCED; gh->gh_ip = (unsigned long)__builtin_return_address(0); } @@ -479,6 +447,29 @@ static void gfs2_holder_put(struct gfs2_holder *gh) kfree(gh); } +static void gfs2_holder_dispose_or_wake(struct gfs2_holder *gh) +{ + if (test_bit(HIF_DEALLOC, &gh->gh_iflags)) { + gfs2_holder_put(gh); + return; + } + clear_bit(HIF_WAIT, &gh->gh_iflags); + smp_mb(); + wake_up_bit(&gh->gh_iflags, HIF_WAIT); +} + +static int holder_wait(void *word) +{ + schedule(); + return 0; +} + +static void wait_on_holder(struct gfs2_holder *gh) +{ + might_sleep(); + wait_on_bit(&gh->gh_iflags, HIF_WAIT, holder_wait, TASK_UNINTERRUPTIBLE); +} + /** * rq_mutex - process a mutex request in the queue * @gh: the glock holder @@ -493,7 +484,9 @@ static int rq_mutex(struct gfs2_holder *gh) list_del_init(&gh->gh_list); /* gh->gh_error never examined. */ set_bit(GLF_LOCK, &gl->gl_flags); - complete(&gh->gh_wait); + clear_bit(HIF_WAIT, &gh->gh_iflags); + smp_mb(); + wake_up_bit(&gh->gh_iflags, HIF_WAIT); return 1; } @@ -511,7 +504,6 @@ static int rq_promote(struct gfs2_holder *gh) { struct gfs2_glock *gl = gh->gh_gl; struct gfs2_sbd *sdp = gl->gl_sbd; - const struct gfs2_glock_operations *glops = gl->gl_ops; if (!relaxed_state_ok(gl->gl_state, gh->gh_state, gh->gh_flags)) { if (list_empty(&gl->gl_holders)) { @@ -526,7 +518,7 @@ static int rq_promote(struct gfs2_holder *gh) gfs2_reclaim_glock(sdp); } - glops->go_xmote_th(gl, gh->gh_state, gh->gh_flags); + gfs2_glock_xmote_th(gh); spin_lock(&gl->gl_spin); } return 1; @@ -537,11 +529,11 @@ static int rq_promote(struct gfs2_holder *gh) set_bit(GLF_LOCK, &gl->gl_flags); } else { struct gfs2_holder *next_gh; - if (gh->gh_flags & GL_LOCAL_EXCL) + if (gh->gh_state == LM_ST_EXCLUSIVE) return 1; next_gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list); - if (next_gh->gh_flags & GL_LOCAL_EXCL) + if (next_gh->gh_state == LM_ST_EXCLUSIVE) return 1; } @@ -549,7 +541,7 @@ static int rq_promote(struct gfs2_holder *gh) gh->gh_error = 0; set_bit(HIF_HOLDER, &gh->gh_iflags); - complete(&gh->gh_wait); + gfs2_holder_dispose_or_wake(gh); return 0; } @@ -564,7 +556,6 @@ static int rq_promote(struct gfs2_holder *gh) static int rq_demote(struct gfs2_holder *gh) { struct gfs2_glock *gl = gh->gh_gl; - const struct gfs2_glock_operations *glops = gl->gl_ops; if (!list_empty(&gl->gl_holders)) return 1; @@ -573,10 +564,7 @@ static int rq_demote(struct gfs2_holder *gh) list_del_init(&gh->gh_list); gh->gh_error = 0; spin_unlock(&gl->gl_spin); - if (test_bit(HIF_DEALLOC, &gh->gh_iflags)) - gfs2_holder_put(gh); - else - complete(&gh->gh_wait); + gfs2_holder_dispose_or_wake(gh); spin_lock(&gl->gl_spin); } else { gl->gl_req_gh = gh; @@ -585,9 +573,9 @@ static int rq_demote(struct gfs2_holder *gh) if (gh->gh_state == LM_ST_UNLOCKED || gl->gl_state != LM_ST_EXCLUSIVE) - glops->go_drop_th(gl); + gfs2_glock_drop_th(gl); else - glops->go_xmote_th(gl, gh->gh_state, gh->gh_flags); + gfs2_glock_xmote_th(gh); spin_lock(&gl->gl_spin); } @@ -596,30 +584,6 @@ static int rq_demote(struct gfs2_holder *gh) } /** - * rq_greedy - process a queued request to drop greedy status - * @gh: the glock holder - * - * Returns: 1 if the queue is blocked - */ - -static int rq_greedy(struct gfs2_holder *gh) -{ - struct gfs2_glock *gl = gh->gh_gl; - - list_del_init(&gh->gh_list); - /* gh->gh_error never examined. */ - clear_bit(GLF_GREEDY, &gl->gl_flags); - spin_unlock(&gl->gl_spin); - - gfs2_holder_uninit(gh); - kfree(container_of(gh, struct greedy, gr_gh)); - - spin_lock(&gl->gl_spin); - - return 0; -} - -/** * run_queue - process holder structures on a glock * @gl: the glock * @@ -649,8 +613,6 @@ static void run_queue(struct gfs2_glock *gl) if (test_bit(HIF_DEMOTE, &gh->gh_iflags)) blocked = rq_demote(gh); - else if (test_bit(HIF_GREEDY, &gh->gh_iflags)) - blocked = rq_greedy(gh); else gfs2_assert_warn(gl->gl_sbd, 0); @@ -684,6 +646,8 @@ static void gfs2_glmutex_lock(struct gfs2_glock *gl) gfs2_holder_init(gl, 0, 0, &gh); set_bit(HIF_MUTEX, &gh.gh_iflags); + if (test_and_set_bit(HIF_WAIT, &gh.gh_iflags)) + BUG(); spin_lock(&gl->gl_spin); if (test_and_set_bit(GLF_LOCK, &gl->gl_flags)) { @@ -691,11 +655,13 @@ static void gfs2_glmutex_lock(struct gfs2_glock *gl) } else { gl->gl_owner = current; gl->gl_ip = (unsigned long)__builtin_return_address(0); - complete(&gh.gh_wait); + clear_bit(HIF_WAIT, &gh.gh_iflags); + smp_mb(); + wake_up_bit(&gh.gh_iflags, HIF_WAIT); } spin_unlock(&gl->gl_spin); - wait_for_completion(&gh.gh_wait); + wait_on_holder(&gh); gfs2_holder_uninit(&gh); } @@ -774,6 +740,7 @@ restart: return; set_bit(HIF_DEMOTE, &new_gh->gh_iflags); set_bit(HIF_DEALLOC, &new_gh->gh_iflags); + set_bit(HIF_WAIT, &new_gh->gh_iflags); goto restart; } @@ -825,7 +792,7 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret) int op_done = 1; gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags)); - gfs2_assert_warn(sdp, queue_empty(gl, &gl->gl_holders)); + gfs2_assert_warn(sdp, list_empty(&gl->gl_holders)); gfs2_assert_warn(sdp, !(ret & LM_OUT_ASYNC)); state_change(gl, ret & LM_OUT_ST_MASK); @@ -908,12 +875,8 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret) gfs2_glock_put(gl); - if (gh) { - if (test_bit(HIF_DEALLOC, &gh->gh_iflags)) - gfs2_holder_put(gh); - else - complete(&gh->gh_wait); - } + if (gh) + gfs2_holder_dispose_or_wake(gh); } /** @@ -924,23 +887,26 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret) * */ -void gfs2_glock_xmote_th(struct gfs2_glock *gl, unsigned int state, int flags) +void gfs2_glock_xmote_th(struct gfs2_holder *gh) { + struct gfs2_glock *gl = gh->gh_gl; struct gfs2_sbd *sdp = gl->gl_sbd; + int flags = gh->gh_flags; + unsigned state = gh->gh_state; const struct gfs2_glock_operations *glops = gl->gl_ops; int lck_flags = flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB | LM_FLAG_NOEXP | LM_FLAG_ANY | LM_FLAG_PRIORITY); unsigned int lck_ret; + if (glops->go_xmote_th) + glops->go_xmote_th(gl); + gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags)); - gfs2_assert_warn(sdp, queue_empty(gl, &gl->gl_holders)); + gfs2_assert_warn(sdp, list_empty(&gl->gl_holders)); gfs2_assert_warn(sdp, state != LM_ST_UNLOCKED); gfs2_assert_warn(sdp, state != gl->gl_state); - if (gl->gl_state == LM_ST_EXCLUSIVE && glops->go_sync) - glops->go_sync(gl); - gfs2_glock_hold(gl); gl->gl_req_bh = xmote_bh; @@ -971,10 +937,8 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret) const struct gfs2_glock_operations *glops = gl->gl_ops; struct gfs2_holder *gh = gl->gl_req_gh; - clear_bit(GLF_PREFETCH, &gl->gl_flags); - gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags)); - gfs2_assert_warn(sdp, queue_empty(gl, &gl->gl_holders)); + gfs2_assert_warn(sdp, list_empty(&gl->gl_holders)); gfs2_assert_warn(sdp, !ret); state_change(gl, LM_ST_UNLOCKED); @@ -1001,12 +965,8 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret) gfs2_glock_put(gl); - if (gh) { - if (test_bit(HIF_DEALLOC, &gh->gh_iflags)) - gfs2_holder_put(gh); - else - complete(&gh->gh_wait); - } + if (gh) + gfs2_holder_dispose_or_wake(gh); } /** @@ -1015,19 +975,19 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret) * */ -void gfs2_glock_drop_th(struct gfs2_glock *gl) +static void gfs2_glock_drop_th(struct gfs2_glock *gl) { struct gfs2_sbd *sdp = gl->gl_sbd; const struct gfs2_glock_operations *glops = gl->gl_ops; unsigned int ret; + if (glops->go_drop_th) + glops->go_drop_th(gl); + gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags)); - gfs2_assert_warn(sdp, queue_empty(gl, &gl->gl_holders)); + gfs2_assert_warn(sdp, list_empty(&gl->gl_holders)); gfs2_assert_warn(sdp, gl->gl_state != LM_ST_UNLOCKED); - if (gl->gl_state == LM_ST_EXCLUSIVE && glops->go_sync) - glops->go_sync(gl); - gfs2_glock_hold(gl); gl->gl_req_bh = drop_bh; @@ -1107,8 +1067,7 @@ static int glock_wait_internal(struct gfs2_holder *gh) if (gh->gh_flags & LM_FLAG_PRIORITY) do_cancels(gh); - wait_for_completion(&gh->gh_wait); - + wait_on_holder(gh); if (gh->gh_error) return gh->gh_error; @@ -1164,6 +1123,8 @@ static void add_to_queue(struct gfs2_holder *gh) struct gfs2_holder *existing; BUG_ON(!gh->gh_owner); + if (test_and_set_bit(HIF_WAIT, &gh->gh_iflags)) + BUG(); existing = find_holder_by_owner(&gl->gl_holders, gh->gh_owner); if (existing) { @@ -1227,8 +1188,6 @@ restart: } } - clear_bit(GLF_PREFETCH, &gl->gl_flags); - return error; } @@ -1321,98 +1280,6 @@ void gfs2_glock_dq(struct gfs2_holder *gh) } /** - * gfs2_glock_prefetch - Try to prefetch a glock - * @gl: the glock - * @state: the state to prefetch in - * @flags: flags passed to go_xmote_th() - * - */ - -static void gfs2_glock_prefetch(struct gfs2_glock *gl, unsigned int state, - int flags) -{ - const struct gfs2_glock_operations *glops = gl->gl_ops; - - spin_lock(&gl->gl_spin); - - if (test_bit(GLF_LOCK, &gl->gl_flags) || !list_empty(&gl->gl_holders) || - !list_empty(&gl->gl_waiters1) || !list_empty(&gl->gl_waiters2) || - !list_empty(&gl->gl_waiters3) || - relaxed_state_ok(gl->gl_state, state, flags)) { - spin_unlock(&gl->gl_spin); - return; - } - - set_bit(GLF_PREFETCH, &gl->gl_flags); - set_bit(GLF_LOCK, &gl->gl_flags); - spin_unlock(&gl->gl_spin); - - glops->go_xmote_th(gl, state, flags); -} - -static void greedy_work(struct work_struct *work) -{ - struct greedy *gr = container_of(work, struct greedy, gr_work.work); - struct gfs2_holder *gh = &gr->gr_gh; - struct gfs2_glock *gl = gh->gh_gl; - const struct gfs2_glock_operations *glops = gl->gl_ops; - - clear_bit(GLF_SKIP_WAITERS2, &gl->gl_flags); - - if (glops->go_greedy) - glops->go_greedy(gl); - - spin_lock(&gl->gl_spin); - - if (list_empty(&gl->gl_waiters2)) { - clear_bit(GLF_GREEDY, &gl->gl_flags); - spin_unlock(&gl->gl_spin); - gfs2_holder_uninit(gh); - kfree(gr); - } else { - gfs2_glock_hold(gl); - list_add_tail(&gh->gh_list, &gl->gl_waiters2); - run_queue(gl); - spin_unlock(&gl->gl_spin); - gfs2_glock_put(gl); - } -} - -/** - * gfs2_glock_be_greedy - - * @gl: - * @time: - * - * Returns: 0 if go_greedy will be called, 1 otherwise - */ - -int gfs2_glock_be_greedy(struct gfs2_glock *gl, unsigned int time) -{ - struct greedy *gr; - struct gfs2_holder *gh; - - if (!time || gl->gl_sbd->sd_args.ar_localcaching || - test_and_set_bit(GLF_GREEDY, &gl->gl_flags)) - return 1; - - gr = kmalloc(sizeof(struct greedy), GFP_KERNEL); - if (!gr) { - clear_bit(GLF_GREEDY, &gl->gl_flags); - return 1; - } - gh = &gr->gr_gh; - - gfs2_holder_init(gl, 0, 0, gh); - set_bit(HIF_GREEDY, &gh->gh_iflags); - INIT_DELAYED_WORK(&gr->gr_work, greedy_work); - - set_bit(GLF_SKIP_WAITERS2, &gl->gl_flags); - schedule_delayed_work(&gr->gr_work, time); - - return 0; -} - -/** * gfs2_glock_dq_uninit - dequeue a holder from a glock and initialize it * @gh: the holder structure * @@ -1470,10 +1337,7 @@ static int glock_compare(const void *arg_a, const void *arg_b) return 1; if (a->ln_number < b->ln_number) return -1; - if (gh_a->gh_state == LM_ST_SHARED && gh_b->gh_state == LM_ST_EXCLUSIVE) - return 1; - if (!(gh_a->gh_flags & GL_LOCAL_EXCL) && (gh_b->gh_flags & GL_LOCAL_EXCL)) - return 1; + BUG_ON(gh_a->gh_gl->gl_ops->go_type == gh_b->gh_gl->gl_ops->go_type); return 0; } @@ -1618,34 +1482,6 @@ void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs) } /** - * gfs2_glock_prefetch_num - prefetch a glock based on lock number - * @sdp: the filesystem - * @number: the lock number - * @glops: the glock operations for the type of glock - * @state: the state to acquire the glock in - * @flags: modifier flags for the aquisition - * - * Returns: errno - */ - -void gfs2_glock_prefetch_num(struct gfs2_sbd *sdp, u64 number, - const struct gfs2_glock_operations *glops, - unsigned int state, int flags) -{ - struct gfs2_glock *gl; - int error; - - if (atomic_read(&sdp->sd_reclaim_count) < - gfs2_tune_get(sdp, gt_reclaim_limit)) { - error = gfs2_glock_get(sdp, number, glops, CREATE, &gl); - if (!error) { - gfs2_glock_prefetch(gl, state, flags); - gfs2_glock_put(gl); - } - } -} - -/** * gfs2_lvb_hold - attach a LVB from a glock * @gl: The glock in question * @@ -1703,8 +1539,6 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name, if (!gl) return; - if (gl->gl_ops->go_callback) - gl->gl_ops->go_callback(gl, state); handle_callback(gl, state); spin_lock(&gl->gl_spin); @@ -1746,12 +1580,14 @@ void gfs2_glock_cb(void *cb_data, unsigned int type, void *data) struct lm_async_cb *async = data; struct gfs2_glock *gl; + down_read(&gfs2_umount_flush_sem); gl = gfs2_glock_find(sdp, &async->lc_name); if (gfs2_assert_warn(sdp, gl)) return; if (!gfs2_assert_warn(sdp, gl->gl_req_bh)) gl->gl_req_bh(gl, async->lc_ret); gfs2_glock_put(gl); + up_read(&gfs2_umount_flush_sem); return; } @@ -1781,15 +1617,11 @@ void gfs2_glock_cb(void *cb_data, unsigned int type, void *data) static int demote_ok(struct gfs2_glock *gl) { - struct gfs2_sbd *sdp = gl->gl_sbd; const struct gfs2_glock_operations *glops = gl->gl_ops; int demote = 1; if (test_bit(GLF_STICKY, &gl->gl_flags)) demote = 0; - else if (test_bit(GLF_PREFETCH, &gl->gl_flags)) - demote = time_after_eq(jiffies, gl->gl_stamp + - gfs2_tune_get(sdp, gt_prefetch_secs) * HZ); else if (glops->go_demote_ok) demote = glops->go_demote_ok(gl); @@ -1845,7 +1677,7 @@ void gfs2_reclaim_glock(struct gfs2_sbd *sdp) atomic_inc(&sdp->sd_reclaimed); if (gfs2_glmutex_trylock(gl)) { - if (queue_empty(gl, &gl->gl_holders) && + if (list_empty(&gl->gl_holders) && gl->gl_state != LM_ST_UNLOCKED && demote_ok(gl)) handle_callback(gl, LM_ST_UNLOCKED); gfs2_glmutex_unlock(gl); @@ -1909,7 +1741,7 @@ static void scan_glock(struct gfs2_glock *gl) return; if (gfs2_glmutex_trylock(gl)) { - if (queue_empty(gl, &gl->gl_holders) && + if (list_empty(&gl->gl_holders) && gl->gl_state != LM_ST_UNLOCKED && demote_ok(gl)) goto out_schedule; gfs2_glmutex_unlock(gl); @@ -1958,7 +1790,7 @@ static void clear_glock(struct gfs2_glock *gl) } if (gfs2_glmutex_trylock(gl)) { - if (queue_empty(gl, &gl->gl_holders) && + if (list_empty(&gl->gl_holders) && gl->gl_state != LM_ST_UNLOCKED) handle_callback(gl, LM_ST_UNLOCKED); gfs2_glmutex_unlock(gl); @@ -2000,7 +1832,9 @@ void gfs2_gl_hash_clear(struct gfs2_sbd *sdp, int wait) t = jiffies; } + down_write(&gfs2_umount_flush_sem); invalidate_inodes(sdp->sd_vfs); + up_write(&gfs2_umount_flush_sem); msleep(10); } } diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index fb39108fc05c..f50e40ceca43 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -20,7 +20,6 @@ #define LM_FLAG_ANY 0x00000008 #define LM_FLAG_PRIORITY 0x00000010 */ -#define GL_LOCAL_EXCL 0x00000020 #define GL_ASYNC 0x00000040 #define GL_EXACT 0x00000080 #define GL_SKIP 0x00000100 @@ -83,17 +82,11 @@ void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags, void gfs2_holder_reinit(unsigned int state, unsigned flags, struct gfs2_holder *gh); void gfs2_holder_uninit(struct gfs2_holder *gh); - -void gfs2_glock_xmote_th(struct gfs2_glock *gl, unsigned int state, int flags); -void gfs2_glock_drop_th(struct gfs2_glock *gl); - int gfs2_glock_nq(struct gfs2_holder *gh); int gfs2_glock_poll(struct gfs2_holder *gh); int gfs2_glock_wait(struct gfs2_holder *gh); void gfs2_glock_dq(struct gfs2_holder *gh); -int gfs2_glock_be_greedy(struct gfs2_glock *gl, unsigned int time); - void gfs2_glock_dq_uninit(struct gfs2_holder *gh); int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number, const struct gfs2_glock_operations *glops, @@ -103,10 +96,6 @@ int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs); -void gfs2_glock_prefetch_num(struct gfs2_sbd *sdp, u64 number, - const struct gfs2_glock_operations *glops, - unsigned int state, int flags); - /** * gfs2_glock_nq_init - intialize a holder and enqueue it on a glock * @gl: the glock diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index b068d10bcb6e..c4b0391b7aa2 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -117,12 +117,14 @@ static void gfs2_pte_inval(struct gfs2_glock *gl) static void meta_go_sync(struct gfs2_glock *gl) { + if (gl->gl_state != LM_ST_EXCLUSIVE) + return; + if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) { gfs2_log_flush(gl->gl_sbd, gl); gfs2_meta_sync(gl); gfs2_ail_empty_gl(gl); } - } /** @@ -142,6 +144,37 @@ static void meta_go_inval(struct gfs2_glock *gl, int flags) } /** + * inode_go_sync - Sync the dirty data and/or metadata for an inode glock + * @gl: the glock protecting the inode + * + */ + +static void inode_go_sync(struct gfs2_glock *gl) +{ + struct gfs2_inode *ip = gl->gl_object; + + if (ip && !S_ISREG(ip->i_inode.i_mode)) + ip = NULL; + + if (test_bit(GLF_DIRTY, &gl->gl_flags)) { + gfs2_log_flush(gl->gl_sbd, gl); + if (ip) + filemap_fdatawrite(ip->i_inode.i_mapping); + gfs2_meta_sync(gl); + if (ip) { + struct address_space *mapping = ip->i_inode.i_mapping; + int error = filemap_fdatawait(mapping); + if (error == -ENOSPC) + set_bit(AS_ENOSPC, &mapping->flags); + else if (error) + set_bit(AS_EIO, &mapping->flags); + } + clear_bit(GLF_DIRTY, &gl->gl_flags); + gfs2_ail_empty_gl(gl); + } +} + +/** * inode_go_xmote_th - promote/demote a glock * @gl: the glock * @state: the requested state @@ -149,12 +182,12 @@ static void meta_go_inval(struct gfs2_glock *gl, int flags) * */ -static void inode_go_xmote_th(struct gfs2_glock *gl, unsigned int state, - int flags) +static void inode_go_xmote_th(struct gfs2_glock *gl) { if (gl->gl_state != LM_ST_UNLOCKED) gfs2_pte_inval(gl); - gfs2_glock_xmote_th(gl, state, flags); + if (gl->gl_state == LM_ST_EXCLUSIVE) + inode_go_sync(gl); } /** @@ -189,38 +222,8 @@ static void inode_go_xmote_bh(struct gfs2_glock *gl) static void inode_go_drop_th(struct gfs2_glock *gl) { gfs2_pte_inval(gl); - gfs2_glock_drop_th(gl); -} - -/** - * inode_go_sync - Sync the dirty data and/or metadata for an inode glock - * @gl: the glock protecting the inode - * - */ - -static void inode_go_sync(struct gfs2_glock *gl) -{ - struct gfs2_inode *ip = gl->gl_object; - - if (ip && !S_ISREG(ip->i_inode.i_mode)) - ip = NULL; - - if (test_bit(GLF_DIRTY, &gl->gl_flags)) { - gfs2_log_flush(gl->gl_sbd, gl); - if (ip) - filemap_fdatawrite(ip->i_inode.i_mapping); - gfs2_meta_sync(gl); - if (ip) { - struct address_space *mapping = ip->i_inode.i_mapping; - int error = filemap_fdatawait(mapping); - if (error == -ENOSPC) - set_bit(AS_ENOSPC, &mapping->flags); - else if (error) - set_bit(AS_EIO, &mapping->flags); - } - clear_bit(GLF_DIRTY, &gl->gl_flags); - gfs2_ail_empty_gl(gl); - } + if (gl->gl_state == LM_ST_EXCLUSIVE) + inode_go_sync(gl); } /** @@ -295,7 +298,7 @@ static int inode_go_lock(struct gfs2_holder *gh) if ((ip->i_di.di_flags & GFS2_DIF_TRUNC_IN_PROG) && (gl->gl_state == LM_ST_EXCLUSIVE) && - (gh->gh_flags & GL_LOCAL_EXCL)) + (gh->gh_state == LM_ST_EXCLUSIVE)) error = gfs2_truncatei_resume(ip); return error; @@ -319,39 +322,6 @@ static void inode_go_unlock(struct gfs2_holder *gh) } /** - * inode_greedy - - * @gl: the glock - * - */ - -static void inode_greedy(struct gfs2_glock *gl) -{ - struct gfs2_sbd *sdp = gl->gl_sbd; - struct gfs2_inode *ip = gl->gl_object; - unsigned int quantum = gfs2_tune_get(sdp, gt_greedy_quantum); - unsigned int max = gfs2_tune_get(sdp, gt_greedy_max); - unsigned int new_time; - - spin_lock(&ip->i_spin); - - if (time_after(ip->i_last_pfault + quantum, jiffies)) { - new_time = ip->i_greedy + quantum; - if (new_time > max) - new_time = max; - } else { - new_time = ip->i_greedy - quantum; - if (!new_time || new_time > max) - new_time = 1; - } - - ip->i_greedy = new_time; - - spin_unlock(&ip->i_spin); - - iput(&ip->i_inode); -} - -/** * rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock * @gl: the glock * @@ -398,8 +368,7 @@ static void rgrp_go_unlock(struct gfs2_holder *gh) * */ -static void trans_go_xmote_th(struct gfs2_glock *gl, unsigned int state, - int flags) +static void trans_go_xmote_th(struct gfs2_glock *gl) { struct gfs2_sbd *sdp = gl->gl_sbd; @@ -408,8 +377,6 @@ static void trans_go_xmote_th(struct gfs2_glock *gl, unsigned int state, gfs2_meta_syncfs(sdp); gfs2_log_shutdown(sdp); } - - gfs2_glock_xmote_th(gl, state, flags); } /** @@ -461,8 +428,6 @@ static void trans_go_drop_th(struct gfs2_glock *gl) gfs2_meta_syncfs(sdp); gfs2_log_shutdown(sdp); } - - gfs2_glock_drop_th(gl); } /** @@ -478,8 +443,8 @@ static int quota_go_demote_ok(struct gfs2_glock *gl) } const struct gfs2_glock_operations gfs2_meta_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, + .go_xmote_th = meta_go_sync, + .go_drop_th = meta_go_sync, .go_type = LM_TYPE_META, }; @@ -487,19 +452,14 @@ const struct gfs2_glock_operations gfs2_inode_glops = { .go_xmote_th = inode_go_xmote_th, .go_xmote_bh = inode_go_xmote_bh, .go_drop_th = inode_go_drop_th, - .go_sync = inode_go_sync, .go_inval = inode_go_inval, .go_demote_ok = inode_go_demote_ok, .go_lock = inode_go_lock, .go_unlock = inode_go_unlock, - .go_greedy = inode_greedy, .go_type = LM_TYPE_INODE, }; const struct gfs2_glock_operations gfs2_rgrp_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, - .go_sync = meta_go_sync, .go_inval = meta_go_inval, .go_demote_ok = rgrp_go_demote_ok, .go_lock = rgrp_go_lock, @@ -515,33 +475,23 @@ const struct gfs2_glock_operations gfs2_trans_glops = { }; const struct gfs2_glock_operations gfs2_iopen_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, .go_type = LM_TYPE_IOPEN, }; const struct gfs2_glock_operations gfs2_flock_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, .go_type = LM_TYPE_FLOCK, }; const struct gfs2_glock_operations gfs2_nondisk_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, .go_type = LM_TYPE_NONDISK, }; const struct gfs2_glock_operations gfs2_quota_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, .go_demote_ok = quota_go_demote_ok, .go_type = LM_TYPE_QUOTA, }; const struct gfs2_glock_operations gfs2_journal_glops = { - .go_xmote_th = gfs2_glock_xmote_th, - .go_drop_th = gfs2_glock_drop_th, .go_type = LM_TYPE_JOURNAL, }; diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index 734421edae85..12c80fd28db5 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -101,17 +101,14 @@ struct gfs2_bufdata { }; struct gfs2_glock_operations { - void (*go_xmote_th) (struct gfs2_glock *gl, unsigned int state, int flags); + void (*go_xmote_th) (struct gfs2_glock *gl); void (*go_xmote_bh) (struct gfs2_glock *gl); void (*go_drop_th) (struct gfs2_glock *gl); void (*go_drop_bh) (struct gfs2_glock *gl); - void (*go_sync) (struct gfs2_glock *gl); void (*go_inval) (struct gfs2_glock *gl, int flags); int (*go_demote_ok) (struct gfs2_glock *gl); int (*go_lock) (struct gfs2_holder *gh); void (*go_unlock) (struct gfs2_holder *gh); - void (*go_callback) (struct gfs2_glock *gl, unsigned int state); - void (*go_greedy) (struct gfs2_glock *gl); const int go_type; }; @@ -120,7 +117,6 @@ enum { HIF_MUTEX = 0, HIF_PROMOTE = 1, HIF_DEMOTE = 2, - HIF_GREEDY = 3, /* States */ HIF_ALLOCED = 4, @@ -128,6 +124,7 @@ enum { HIF_HOLDER = 6, HIF_FIRST = 7, HIF_ABORTED = 9, + HIF_WAIT = 10, }; struct gfs2_holder { @@ -140,17 +137,14 @@ struct gfs2_holder { int gh_error; unsigned long gh_iflags; - struct completion gh_wait; unsigned long gh_ip; }; enum { GLF_LOCK = 1, GLF_STICKY = 2, - GLF_PREFETCH = 3, GLF_DIRTY = 5, GLF_SKIP_WAITERS2 = 6, - GLF_GREEDY = 7, }; struct gfs2_glock { @@ -167,7 +161,7 @@ struct gfs2_glock { unsigned long gl_ip; struct list_head gl_holders; struct list_head gl_waiters1; /* HIF_MUTEX */ - struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */ + struct list_head gl_waiters2; /* HIF_DEMOTE */ struct list_head gl_waiters3; /* HIF_PROMOTE */ const struct gfs2_glock_operations *gl_ops; @@ -236,7 +230,6 @@ struct gfs2_inode { spinlock_t i_spin; struct rw_semaphore i_rw_mutex; - unsigned int i_greedy; unsigned long i_last_pfault; struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT]; @@ -418,17 +411,12 @@ struct gfs2_tune { unsigned int gt_atime_quantum; /* Min secs between atime updates */ unsigned int gt_new_files_jdata; unsigned int gt_new_files_directio; - unsigned int gt_max_atomic_write; /* Split big writes into this size */ unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ unsigned int gt_lockdump_size; unsigned int gt_stall_secs; /* Detects trouble! */ unsigned int gt_complain_secs; unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */ unsigned int gt_entries_per_readdir; - unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */ - unsigned int gt_greedy_default; - unsigned int gt_greedy_quantum; - unsigned int gt_greedy_max; unsigned int gt_statfs_quantum; unsigned int gt_statfs_slow; }; diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index d122074c45e1..0d6831a40565 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -287,10 +287,8 @@ out: * * Returns: errno */ - int gfs2_change_nlink(struct gfs2_inode *ip, int diff) { - struct gfs2_sbd *sdp = ip->i_inode.i_sb->s_fs_info; struct buffer_head *dibh; u32 nlink; int error; @@ -315,42 +313,34 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff) else drop_nlink(&ip->i_inode); - ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); mark_inode_dirty(&ip->i_inode); - if (ip->i_inode.i_nlink == 0) { - struct gfs2_rgrpd *rgd; - struct gfs2_holder ri_gh, rg_gh; - - error = gfs2_rindex_hold(sdp, &ri_gh); - if (error) - goto out; - error = -EIO; - rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); - if (!rgd) - goto out_norgrp; - error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); - if (error) - goto out_norgrp; - + if (ip->i_inode.i_nlink == 0) gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ - gfs2_glock_dq_uninit(&rg_gh); -out_norgrp: - gfs2_glock_dq_uninit(&ri_gh); - } -out: + return error; } struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) { struct qstr qstr; + struct inode *inode; gfs2_str2qstr(&qstr, name); - return gfs2_lookupi(dip, &qstr, 1, NULL); + inode = gfs2_lookupi(dip, &qstr, 1, NULL); + /* gfs2_lookupi has inconsistent callers: vfs + * related routines expect NULL for no entry found, + * gfs2_lookup_simple callers expect ENOENT + * and do not check for NULL. + */ + if (inode == NULL) + return ERR_PTR(-ENOENT); + else + return inode; } @@ -361,8 +351,10 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) * @is_root: If 1, ignore the caller's permissions * @i_gh: An uninitialized holder for the new inode glock * - * There will always be a vnode (Linux VFS inode) for the d_gh inode unless - * @is_root is true. + * This can be called via the VFS filldir function when NFS is doing + * a readdirplus and the inode which its intending to stat isn't + * already in cache. In this case we must not take the directory glock + * again, since the readdir call will have already taken that lock. * * Returns: errno */ @@ -375,8 +367,9 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, struct gfs2_holder d_gh; struct gfs2_inum_host inum; unsigned int type; - int error = 0; + int error; struct inode *inode = NULL; + int unlock = 0; if (!name->len || name->len > GFS2_FNAMESIZE) return ERR_PTR(-ENAMETOOLONG); @@ -388,9 +381,12 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, return dir; } - error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); - if (error) - return ERR_PTR(error); + if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) { + error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); + if (error) + return ERR_PTR(error); + unlock = 1; + } if (!is_root) { error = permission(dir, MAY_EXEC, NULL); @@ -405,10 +401,11 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, inode = gfs2_inode_lookup(sb, &inum, type); out: - gfs2_glock_dq_uninit(&d_gh); + if (unlock) + gfs2_glock_dq_uninit(&d_gh); if (error == -ENOENT) return NULL; - return inode; + return inode ? inode : ERR_PTR(error); } static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) diff --git a/fs/gfs2/lm.c b/fs/gfs2/lm.c index effe4a337c1d..e30673dd37e0 100644 --- a/fs/gfs2/lm.c +++ b/fs/gfs2/lm.c @@ -104,15 +104,9 @@ int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...) vprintk(fmt, args); va_end(args); - fs_err(sdp, "about to withdraw from the cluster\n"); + fs_err(sdp, "about to withdraw this file system\n"); BUG_ON(sdp->sd_args.ar_debug); - - fs_err(sdp, "waiting for outstanding I/O\n"); - - /* FIXME: suspend dm device so oustanding bio's complete - and all further io requests fail */ - fs_err(sdp, "telling LM to withdraw\n"); gfs2_withdraw_lockproto(&sdp->sd_lockstruct); fs_err(sdp, "withdrawn\n"); diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h index 33af707a4d3f..a87c7bf3c568 100644 --- a/fs/gfs2/locking/dlm/lock_dlm.h +++ b/fs/gfs2/locking/dlm/lock_dlm.h @@ -36,7 +36,7 @@ #define GDLM_STRNAME_BYTES 24 #define GDLM_LVB_SIZE 32 -#define GDLM_DROP_COUNT 50000 +#define GDLM_DROP_COUNT 200000 #define GDLM_DROP_PERIOD 60 #define GDLM_NAME_LEN 128 diff --git a/fs/gfs2/locking/dlm/main.c b/fs/gfs2/locking/dlm/main.c index 2194b1d5b5ec..a0e7eda643ed 100644 --- a/fs/gfs2/locking/dlm/main.c +++ b/fs/gfs2/locking/dlm/main.c @@ -11,9 +11,6 @@ #include "lock_dlm.h" -extern int gdlm_drop_count; -extern int gdlm_drop_period; - extern struct lm_lockops gdlm_ops; static int __init init_lock_dlm(void) @@ -40,9 +37,6 @@ static int __init init_lock_dlm(void) return error; } - gdlm_drop_count = GDLM_DROP_COUNT; - gdlm_drop_period = GDLM_DROP_PERIOD; - printk(KERN_INFO "Lock_DLM (built %s %s) installed\n", __DATE__, __TIME__); return 0; diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c index cdd1694e889b..1d8faa3da8af 100644 --- a/fs/gfs2/locking/dlm/mount.c +++ b/fs/gfs2/locking/dlm/mount.c @@ -9,8 +9,6 @@ #include "lock_dlm.h" -int gdlm_drop_count; -int gdlm_drop_period; const struct lm_lockops gdlm_ops; @@ -24,8 +22,8 @@ static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp, if (!ls) return NULL; - ls->drop_locks_count = gdlm_drop_count; - ls->drop_locks_period = gdlm_drop_period; + ls->drop_locks_count = GDLM_DROP_COUNT; + ls->drop_locks_period = GDLM_DROP_PERIOD; ls->fscb = cb; ls->sdp = sdp; ls->fsflags = flags; diff --git a/fs/gfs2/locking/dlm/sysfs.c b/fs/gfs2/locking/dlm/sysfs.c index 29ae06f94944..4746b884662d 100644 --- a/fs/gfs2/locking/dlm/sysfs.c +++ b/fs/gfs2/locking/dlm/sysfs.c @@ -116,6 +116,17 @@ static ssize_t recover_status_show(struct gdlm_ls *ls, char *buf) return sprintf(buf, "%d\n", ls->recover_jid_status); } +static ssize_t drop_count_show(struct gdlm_ls *ls, char *buf) +{ + return sprintf(buf, "%d\n", ls->drop_locks_count); +} + +static ssize_t drop_count_store(struct gdlm_ls *ls, const char *buf, size_t len) +{ + ls->drop_locks_count = simple_strtol(buf, NULL, 0); + return len; +} + struct gdlm_attr { struct attribute attr; ssize_t (*show)(struct gdlm_ls *, char *); @@ -135,6 +146,7 @@ GDLM_ATTR(first_done, 0444, first_done_show, NULL); GDLM_ATTR(recover, 0644, recover_show, recover_store); GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); +GDLM_ATTR(drop_count, 0644, drop_count_show, drop_count_store); static struct attribute *gdlm_attrs[] = { &gdlm_attr_proto_name.attr, @@ -147,6 +159,7 @@ static struct attribute *gdlm_attrs[] = { &gdlm_attr_recover.attr, &gdlm_attr_recover_done.attr, &gdlm_attr_recover_status.attr, + &gdlm_attr_drop_count.attr, NULL, }; diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 4d7f94d8c7bd..16bb4b4561ae 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -69,13 +69,16 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le); struct gfs2_trans *tr; - if (!list_empty(&bd->bd_list_tr)) + gfs2_log_lock(sdp); + if (!list_empty(&bd->bd_list_tr)) { + gfs2_log_unlock(sdp); return; - + } tr = current->journal_info; tr->tr_touched = 1; tr->tr_num_buf++; list_add(&bd->bd_list_tr, &tr->tr_list_buf); + gfs2_log_unlock(sdp); if (!list_empty(&le->le_list)) return; @@ -84,7 +87,6 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) gfs2_meta_check(sdp, bd->bd_bh); gfs2_pin(sdp, bd->bd_bh); - gfs2_log_lock(sdp); sdp->sd_log_num_buf++; list_add(&le->le_list, &sdp->sd_log_le_buf); @@ -98,11 +100,13 @@ static void buf_lo_incore_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) struct list_head *head = &tr->tr_list_buf; struct gfs2_bufdata *bd; + gfs2_log_lock(sdp); while (!list_empty(head)) { bd = list_entry(head->next, struct gfs2_bufdata, bd_list_tr); list_del_init(&bd->bd_list_tr); tr->tr_num_buf--; } + gfs2_log_unlock(sdp); gfs2_assert_warn(sdp, !tr->tr_num_buf); } @@ -462,13 +466,17 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le) struct address_space *mapping = bd->bd_bh->b_page->mapping; struct gfs2_inode *ip = GFS2_I(mapping->host); + gfs2_log_lock(sdp); tr->tr_touched = 1; if (list_empty(&bd->bd_list_tr) && (ip->i_di.di_flags & GFS2_DIF_JDATA)) { tr->tr_num_buf++; list_add(&bd->bd_list_tr, &tr->tr_list_buf); + gfs2_log_unlock(sdp); gfs2_pin(sdp, bd->bd_bh); tr->tr_num_buf_new++; + } else { + gfs2_log_unlock(sdp); } gfs2_trans_add_gl(bd->bd_gl); gfs2_log_lock(sdp); diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c index d8d69a72a10d..56e33590b656 100644 --- a/fs/gfs2/ops_address.c +++ b/fs/gfs2/ops_address.c @@ -16,6 +16,7 @@ #include <linux/pagevec.h> #include <linux/mpage.h> #include <linux/fs.h> +#include <linux/writeback.h> #include <linux/gfs2_ondisk.h> #include <linux/lm_interface.h> @@ -157,6 +158,32 @@ out_ignore: } /** + * gfs2_writepages - Write a bunch of dirty pages back to disk + * @mapping: The mapping to write + * @wbc: Write-back control + * + * For journaled files and/or ordered writes this just falls back to the + * kernel's default writepages path for now. We will probably want to change + * that eventually (i.e. when we look at allocate on flush). + * + * For the data=writeback case though we can already ignore buffer heads + * and write whole extents at once. This is a big reduction in the + * number of I/O requests we send and the bmap calls we make in this case. + */ +static int gfs2_writepages(struct address_space *mapping, + struct writeback_control *wbc) +{ + struct inode *inode = mapping->host; + struct gfs2_inode *ip = GFS2_I(inode); + struct gfs2_sbd *sdp = GFS2_SB(inode); + + if (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK && !gfs2_is_jdata(ip)) + return mpage_writepages(mapping, wbc, gfs2_get_block_noalloc); + + return generic_writepages(mapping, wbc); +} + +/** * stuffed_readpage - Fill in a Linux page with stuffed file data * @ip: the inode * @page: the page @@ -256,7 +283,7 @@ out_unlock: * the page lock and the glock) and return having done no I/O. Its * obviously not something we'd want to do on too regular a basis. * Any I/O we ignore at this time will be done via readpage later. - * 2. We have to handle stuffed files here too. + * 2. We don't handle stuffed files here we let readpage do the honours. * 3. mpage_readpages() does most of the heavy lifting in the common case. * 4. gfs2_get_block() is relied upon to set BH_Boundary in the right places. * 5. We use LM_FLAG_TRY_1CB here, effectively we then have lock-ahead as @@ -269,8 +296,7 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping, struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); struct gfs2_holder gh; - unsigned page_idx; - int ret; + int ret = 0; int do_unlock = 0; if (likely(file != &gfs2_internal_file_sentinel)) { @@ -289,29 +315,8 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping, goto out_unlock; } skip_lock: - if (gfs2_is_stuffed(ip)) { - struct pagevec lru_pvec; - pagevec_init(&lru_pvec, 0); - for (page_idx = 0; page_idx < nr_pages; page_idx++) { - struct page *page = list_entry(pages->prev, struct page, lru); - prefetchw(&page->flags); - list_del(&page->lru); - if (!add_to_page_cache(page, mapping, - page->index, GFP_KERNEL)) { - ret = stuffed_readpage(ip, page); - unlock_page(page); - if (!pagevec_add(&lru_pvec, page)) - __pagevec_lru_add(&lru_pvec); - } else { - page_cache_release(page); - } - } - pagevec_lru_add(&lru_pvec); - ret = 0; - } else { - /* What we really want to do .... */ + if (!gfs2_is_stuffed(ip)) ret = mpage_readpages(mapping, pages, nr_pages, gfs2_get_block); - } if (do_unlock) { gfs2_glock_dq_m(1, &gh); @@ -356,8 +361,10 @@ static int gfs2_prepare_write(struct file *file, struct page *page, gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME|LM_FLAG_TRY_1CB, &ip->i_gh); error = gfs2_glock_nq_atime(&ip->i_gh); if (unlikely(error)) { - if (error == GLR_TRYFAILED) + if (error == GLR_TRYFAILED) { + unlock_page(page); error = AOP_TRUNCATED_PAGE; + } goto out_uninit; } @@ -594,6 +601,36 @@ static void gfs2_invalidatepage(struct page *page, unsigned long offset) return; } +/** + * gfs2_ok_for_dio - check that dio is valid on this file + * @ip: The inode + * @rw: READ or WRITE + * @offset: The offset at which we are reading or writing + * + * Returns: 0 (to ignore the i/o request and thus fall back to buffered i/o) + * 1 (to accept the i/o request) + */ +static int gfs2_ok_for_dio(struct gfs2_inode *ip, int rw, loff_t offset) +{ + /* + * Should we return an error here? I can't see that O_DIRECT for + * a journaled file makes any sense. For now we'll silently fall + * back to buffered I/O, likewise we do the same for stuffed + * files since they are (a) small and (b) unaligned. + */ + if (gfs2_is_jdata(ip)) + return 0; + + if (gfs2_is_stuffed(ip)) + return 0; + + if (offset > i_size_read(&ip->i_inode)) + return 0; + return 1; +} + + + static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) @@ -604,42 +641,28 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb, struct gfs2_holder gh; int rv; - if (rw == READ) - mutex_lock(&inode->i_mutex); /* - * Shared lock, even if its a write, since we do no allocation - * on this path. All we need change is atime. + * Deferred lock, even if its a write, since we do no allocation + * on this path. All we need change is atime, and this lock mode + * ensures that other nodes have flushed their buffered read caches + * (i.e. their page cache entries for this inode). We do not, + * unfortunately have the option of only flushing a range like + * the VFS does. */ - gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh); + gfs2_holder_init(ip->i_gl, LM_ST_DEFERRED, GL_ATIME, &gh); rv = gfs2_glock_nq_atime(&gh); if (rv) - goto out; - - if (offset > i_size_read(inode)) - goto out; - - /* - * Should we return an error here? I can't see that O_DIRECT for - * a journaled file makes any sense. For now we'll silently fall - * back to buffered I/O, likewise we do the same for stuffed - * files since they are (a) small and (b) unaligned. - */ - if (gfs2_is_jdata(ip)) - goto out; - - if (gfs2_is_stuffed(ip)) - goto out; - - rv = blockdev_direct_IO_own_locking(rw, iocb, inode, - inode->i_sb->s_bdev, - iov, offset, nr_segs, - gfs2_get_block_direct, NULL); + return rv; + rv = gfs2_ok_for_dio(ip, rw, offset); + if (rv != 1) + goto out; /* dio not valid, fall back to buffered i/o */ + + rv = blockdev_direct_IO_no_locking(rw, iocb, inode, inode->i_sb->s_bdev, + iov, offset, nr_segs, + gfs2_get_block_direct, NULL); out: gfs2_glock_dq_m(1, &gh); gfs2_holder_uninit(&gh); - if (rw == READ) - mutex_unlock(&inode->i_mutex); - return rv; } @@ -763,6 +786,7 @@ out: const struct address_space_operations gfs2_file_aops = { .writepage = gfs2_writepage, + .writepages = gfs2_writepages, .readpage = gfs2_readpage, .readpages = gfs2_readpages, .sync_page = block_sync_page, diff --git a/fs/gfs2/ops_dentry.c b/fs/gfs2/ops_dentry.c index d355899585d8..9187eb174b43 100644 --- a/fs/gfs2/ops_dentry.c +++ b/fs/gfs2/ops_dentry.c @@ -46,6 +46,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd) struct gfs2_inum_host inum; unsigned int type; int error; + int had_lock=0; if (inode && is_bad_inode(inode)) goto invalid; @@ -53,9 +54,12 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd) if (sdp->sd_args.ar_localcaching) goto valid; - error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); - if (error) - goto fail; + had_lock = gfs2_glock_is_locked_by_me(dip->i_gl); + if (!had_lock) { + error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); + if (error) + goto fail; + } error = gfs2_dir_search(parent->d_inode, &dentry->d_name, &inum, &type); switch (error) { @@ -82,13 +86,15 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd) } valid_gunlock: - gfs2_glock_dq_uninit(&d_gh); + if (!had_lock) + gfs2_glock_dq_uninit(&d_gh); valid: dput(parent); return 1; invalid_gunlock: - gfs2_glock_dq_uninit(&d_gh); + if (!had_lock) + gfs2_glock_dq_uninit(&d_gh); invalid: if (inode && S_ISDIR(inode->i_mode)) { if (have_submounts(dentry)) diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c index b4e7b8775315..4855e8cca622 100644 --- a/fs/gfs2/ops_export.c +++ b/fs/gfs2/ops_export.c @@ -22,6 +22,7 @@ #include "glock.h" #include "glops.h" #include "inode.h" +#include "ops_dentry.h" #include "ops_export.h" #include "rgrp.h" #include "util.h" @@ -112,13 +113,12 @@ struct get_name_filldir { char *name; }; -static int get_name_filldir(void *opaque, const char *name, unsigned int length, - u64 offset, struct gfs2_inum_host *inum, - unsigned int type) +static int get_name_filldir(void *opaque, const char *name, int length, + loff_t offset, u64 inum, unsigned int type) { - struct get_name_filldir *gnfd = (struct get_name_filldir *)opaque; + struct get_name_filldir *gnfd = opaque; - if (!gfs2_inum_equal(inum, &gnfd->inum)) + if (inum != gnfd->inum.no_addr) return 0; memcpy(gnfd->name, name, length); @@ -189,6 +189,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child) return ERR_PTR(-ENOMEM); } + dentry->d_op = &gfs2_dops; return dentry; } @@ -215,8 +216,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj) } error = gfs2_glock_nq_num(sdp, inum->no_addr, &gfs2_inode_glops, - LM_ST_SHARED, LM_FLAG_ANY | GL_LOCAL_EXCL, - &i_gh); + LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (error) return ERR_PTR(error); @@ -269,6 +269,7 @@ out_inode: return ERR_PTR(-ENOMEM); } + dentry->d_op = &gfs2_dops; return dentry; fail_rgd: diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c index faa07e4b97d0..c996aa739a05 100644 --- a/fs/gfs2/ops_file.c +++ b/fs/gfs2/ops_file.c @@ -43,15 +43,6 @@ #include "util.h" #include "eaops.h" -/* For regular, non-NFS */ -struct filldir_reg { - struct gfs2_sbd *fdr_sbd; - int fdr_prefetch; - - filldir_t fdr_filldir; - void *fdr_opaque; -}; - /* * Most fields left uninitialised to catch anybody who tries to * use them. f_flags set to prevent file_accessed() from touching @@ -128,41 +119,6 @@ static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin) } /** - * filldir_func - Report a directory entry to the caller of gfs2_dir_read() - * @opaque: opaque data used by the function - * @name: the name of the directory entry - * @length: the length of the name - * @offset: the entry's offset in the directory - * @inum: the inode number the entry points to - * @type: the type of inode the entry points to - * - * Returns: 0 on success, 1 if buffer full - */ - -static int filldir_func(void *opaque, const char *name, unsigned int length, - u64 offset, struct gfs2_inum_host *inum, - unsigned int type) -{ - struct filldir_reg *fdr = (struct filldir_reg *)opaque; - struct gfs2_sbd *sdp = fdr->fdr_sbd; - int error; - - error = fdr->fdr_filldir(fdr->fdr_opaque, name, length, offset, - inum->no_addr, type); - if (error) - return 1; - - if (fdr->fdr_prefetch && !(length == 1 && *name == '.')) { - gfs2_glock_prefetch_num(sdp, inum->no_addr, &gfs2_inode_glops, - LM_ST_SHARED, LM_FLAG_TRY | LM_FLAG_ANY); - gfs2_glock_prefetch_num(sdp, inum->no_addr, &gfs2_iopen_glops, - LM_ST_SHARED, LM_FLAG_TRY); - } - - return 0; -} - -/** * gfs2_readdir - Read directory entries from a directory * @file: The directory to read from * @dirent: Buffer for dirents @@ -175,16 +131,10 @@ static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir) { struct inode *dir = file->f_mapping->host; struct gfs2_inode *dip = GFS2_I(dir); - struct filldir_reg fdr; struct gfs2_holder d_gh; u64 offset = file->f_pos; int error; - fdr.fdr_sbd = GFS2_SB(dir); - fdr.fdr_prefetch = 1; - fdr.fdr_filldir = filldir; - fdr.fdr_opaque = dirent; - gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh); error = gfs2_glock_nq_atime(&d_gh); if (error) { @@ -192,7 +142,7 @@ static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir) return error; } - error = gfs2_dir_read(dir, &offset, &fdr, filldir_func); + error = gfs2_dir_read(dir, &offset, dirent, filldir); gfs2_glock_dq_uninit(&d_gh); diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 636dda4c7d38..f40a84807d75 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -264,13 +264,23 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry) struct gfs2_inode *dip = GFS2_I(dir); struct gfs2_sbd *sdp = GFS2_SB(dir); struct gfs2_inode *ip = GFS2_I(dentry->d_inode); - struct gfs2_holder ghs[2]; + struct gfs2_holder ghs[3]; + struct gfs2_rgrpd *rgd; + struct gfs2_holder ri_gh; int error; + error = gfs2_rindex_hold(sdp, &ri_gh); + if (error) + return error; + gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); - gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); + gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); - error = gfs2_glock_nq_m(2, ghs); + rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); + gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); + + + error = gfs2_glock_nq_m(3, ghs); if (error) goto out; @@ -291,10 +301,12 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry) out_end_trans: gfs2_trans_end(sdp); out_gunlock: - gfs2_glock_dq_m(2, ghs); + gfs2_glock_dq_m(3, ghs); out: gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); + gfs2_holder_uninit(ghs + 2); + gfs2_glock_dq_uninit(&ri_gh); return error; } @@ -449,13 +461,22 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) struct gfs2_inode *dip = GFS2_I(dir); struct gfs2_sbd *sdp = GFS2_SB(dir); struct gfs2_inode *ip = GFS2_I(dentry->d_inode); - struct gfs2_holder ghs[2]; + struct gfs2_holder ghs[3]; + struct gfs2_rgrpd *rgd; + struct gfs2_holder ri_gh; int error; + + error = gfs2_rindex_hold(sdp, &ri_gh); + if (error) + return error; gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); - error = gfs2_glock_nq_m(2, ghs); + rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); + gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); + + error = gfs2_glock_nq_m(3, ghs); if (error) goto out; @@ -483,10 +504,12 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) gfs2_trans_end(sdp); out_gunlock: - gfs2_glock_dq_m(2, ghs); + gfs2_glock_dq_m(3, ghs); out: gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); + gfs2_holder_uninit(ghs + 2); + gfs2_glock_dq_uninit(&ri_gh); return error; } @@ -547,7 +570,8 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, struct gfs2_inode *ip = GFS2_I(odentry->d_inode); struct gfs2_inode *nip = NULL; struct gfs2_sbd *sdp = GFS2_SB(odir); - struct gfs2_holder ghs[4], r_gh; + struct gfs2_holder ghs[5], r_gh; + struct gfs2_rgrpd *nrgd; unsigned int num_gh; int dir_rename = 0; int alloc_required; @@ -587,6 +611,13 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, if (nip) { gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); num_gh++; + /* grab the resource lock for unlink flag twiddling + * this is the case of the target file already existing + * so we unlink before doing the rename + */ + nrgd = gfs2_blk2rgrpd(sdp, nip->i_num.no_addr); + if (nrgd) + gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); } error = gfs2_glock_nq_m(num_gh, ghs); @@ -684,12 +715,12 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + al->al_rgd->rd_ri.ri_length + 4 * RES_DINODE + 4 * RES_LEAF + - RES_STATFS + RES_QUOTA, 0); + RES_STATFS + RES_QUOTA + 4, 0); if (error) goto out_ipreserv; } else { error = gfs2_trans_begin(sdp, 4 * RES_DINODE + - 5 * RES_LEAF, 0); + 5 * RES_LEAF + 4, 0); if (error) goto out_gunlock; } @@ -728,7 +759,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, error = gfs2_meta_inode_buffer(ip, &dibh); if (error) goto out_end_trans; - ip->i_inode.i_ctime.tv_sec = get_seconds(); + ip->i_inode.i_ctime = CURRENT_TIME_SEC; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); @@ -1018,7 +1049,7 @@ static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, } generic_fillattr(inode, stat); - if (unlock); + if (unlock) gfs2_glock_dq_uninit(&gh); return 0; diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c index 7685b46f934b..47369d011214 100644 --- a/fs/gfs2/ops_super.c +++ b/fs/gfs2/ops_super.c @@ -173,6 +173,9 @@ static void gfs2_write_super_lockfs(struct super_block *sb) struct gfs2_sbd *sdp = sb->s_fs_info; int error; + if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) + return; + for (;;) { error = gfs2_freeze_fs(sdp); if (!error) @@ -426,6 +429,12 @@ static void gfs2_delete_inode(struct inode *inode) } error = gfs2_dinode_dealloc(ip); + /* + * Must do this before unlock to avoid trying to write back + * potentially dirty data now that inode no longer exists + * on disk. + */ + truncate_inode_pages(&inode->i_data, 0); out_unlock: gfs2_glock_dq(&ip->i_iopen_gh); @@ -443,14 +452,12 @@ out: static struct inode *gfs2_alloc_inode(struct super_block *sb) { - struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_inode *ip; ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); if (ip) { ip->i_flags = 0; ip->i_gl = NULL; - ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default); ip->i_last_pfault = jiffies; } return &ip->i_inode; diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c index 45a5f11fc39a..14b380fb0602 100644 --- a/fs/gfs2/ops_vm.c +++ b/fs/gfs2/ops_vm.c @@ -28,34 +28,13 @@ #include "trans.h" #include "util.h" -static void pfault_be_greedy(struct gfs2_inode *ip) -{ - unsigned int time; - - spin_lock(&ip->i_spin); - time = ip->i_greedy; - ip->i_last_pfault = jiffies; - spin_unlock(&ip->i_spin); - - igrab(&ip->i_inode); - if (gfs2_glock_be_greedy(ip->i_gl, time)) - iput(&ip->i_inode); -} - static struct page *gfs2_private_nopage(struct vm_area_struct *area, unsigned long address, int *type) { struct gfs2_inode *ip = GFS2_I(area->vm_file->f_mapping->host); - struct page *result; set_bit(GIF_PAGED, &ip->i_flags); - - result = filemap_nopage(area, address, type); - - if (result && result != NOPAGE_OOM) - pfault_be_greedy(ip); - - return result; + return filemap_nopage(area, address, type); } static int alloc_page_backing(struct gfs2_inode *ip, struct page *page) @@ -167,7 +146,6 @@ static struct page *gfs2_sharewrite_nopage(struct vm_area_struct *area, set_page_dirty(result); } - pfault_be_greedy(ip); out: gfs2_glock_dq_uninit(&i_gh); diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 43a24f2e5905..70f424fcf1cd 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -71,17 +71,12 @@ void gfs2_tune_init(struct gfs2_tune *gt) gt->gt_atime_quantum = 3600; gt->gt_new_files_jdata = 0; gt->gt_new_files_directio = 0; - gt->gt_max_atomic_write = 4 << 20; gt->gt_max_readahead = 1 << 18; gt->gt_lockdump_size = 131072; gt->gt_stall_secs = 600; gt->gt_complain_secs = 10; gt->gt_reclaim_limit = 5000; gt->gt_entries_per_readdir = 32; - gt->gt_prefetch_secs = 10; - gt->gt_greedy_default = HZ / 10; - gt->gt_greedy_quantum = HZ / 40; - gt->gt_greedy_max = HZ / 4; gt->gt_statfs_quantum = 30; gt->gt_statfs_slow = 0; } @@ -359,8 +354,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) mutex_lock(&sdp->sd_jindex_mutex); for (;;) { - error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, - GL_LOCAL_EXCL, ji_gh); + error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); if (error) break; @@ -529,8 +523,7 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp) struct gfs2_log_header_host head; int error; - error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, - GL_LOCAL_EXCL, &t_gh); + error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); if (error) return error; @@ -583,9 +576,8 @@ int gfs2_make_fs_ro(struct gfs2_sbd *sdp) gfs2_quota_sync(sdp); gfs2_statfs_sync(sdp); - error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, - GL_LOCAL_EXCL | GL_NOCACHE, - &t_gh); + error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, + &t_gh); if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) return error; diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c index 983eaf1e06be..d01f9f0fda26 100644 --- a/fs/gfs2/sys.c +++ b/fs/gfs2/sys.c @@ -436,17 +436,12 @@ TUNE_ATTR(atime_quantum, 0); TUNE_ATTR(max_readahead, 0); TUNE_ATTR(complain_secs, 0); TUNE_ATTR(reclaim_limit, 0); -TUNE_ATTR(prefetch_secs, 0); TUNE_ATTR(statfs_slow, 0); TUNE_ATTR(new_files_jdata, 0); TUNE_ATTR(new_files_directio, 0); TUNE_ATTR(quota_simul_sync, 1); TUNE_ATTR(quota_cache_secs, 1); -TUNE_ATTR(max_atomic_write, 1); TUNE_ATTR(stall_secs, 1); -TUNE_ATTR(greedy_default, 1); -TUNE_ATTR(greedy_quantum, 1); -TUNE_ATTR(greedy_max, 1); TUNE_ATTR(statfs_quantum, 1); TUNE_ATTR_DAEMON(scand_secs, scand_process); TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process); @@ -465,15 +460,10 @@ static struct attribute *tune_attrs[] = { &tune_attr_max_readahead.attr, &tune_attr_complain_secs.attr, &tune_attr_reclaim_limit.attr, - &tune_attr_prefetch_secs.attr, &tune_attr_statfs_slow.attr, &tune_attr_quota_simul_sync.attr, &tune_attr_quota_cache_secs.attr, - &tune_attr_max_atomic_write.attr, &tune_attr_stall_secs.attr, - &tune_attr_greedy_default.attr, - &tune_attr_greedy_quantum.attr, - &tune_attr_greedy_max.attr, &tune_attr_statfs_quantum.attr, &tune_attr_scand_secs.attr, &tune_attr_recoverd_secs.attr, diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index f5719117edfe..e285022f006c 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -182,9 +182,9 @@ int jfs_get_block(struct inode *ip, sector_t lblock, * Take appropriate lock on inode */ if (create) - IWRITE_LOCK(ip); + IWRITE_LOCK(ip, RDWRLOCK_NORMAL); else - IREAD_LOCK(ip); + IREAD_LOCK(ip, RDWRLOCK_NORMAL); if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) && (!xtLookup(ip, lblock64, xlen, &xflag, &xaddr, &xlen, 0)) && @@ -359,7 +359,7 @@ void jfs_truncate(struct inode *ip) nobh_truncate_page(ip->i_mapping, ip->i_size); - IWRITE_LOCK(ip); + IWRITE_LOCK(ip, RDWRLOCK_NORMAL); jfs_truncate_nolock(ip, ip->i_size); IWRITE_UNLOCK(ip); } diff --git a/fs/jfs/jfs_debug.h b/fs/jfs/jfs_debug.h index ddffbbd4d955..7378798f0b21 100644 --- a/fs/jfs/jfs_debug.h +++ b/fs/jfs/jfs_debug.h @@ -39,10 +39,6 @@ extern void jfs_proc_clean(void); /* * assert with traditional printf/panic */ -#ifdef CONFIG_KERNEL_ASSERTS -/* kgdb stuff */ -#define assert(p) KERNEL_ASSERT(#p, p) -#else #define assert(p) do { \ if (!(p)) { \ printk(KERN_CRIT "BUG at %s:%d assert(%s)\n", \ @@ -50,7 +46,6 @@ extern void jfs_proc_clean(void); BUG(); \ } \ } while (0) -#endif /* * debug ON diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 23546c8fd48b..82b0544bd76d 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -337,7 +337,7 @@ int dbFree(struct inode *ip, s64 blkno, s64 nblocks) struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap; struct bmap *bmp = JFS_SBI(ip->i_sb)->bmap; - IREAD_LOCK(ipbmap); + IREAD_LOCK(ipbmap, RDWRLOCK_DMAP); /* block to be freed better be within the mapsize. */ if (unlikely((blkno == 0) || (blkno + nblocks > bmp->db_mapsize))) { @@ -733,7 +733,7 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results) * allocation group size, try to allocate anywhere. */ if (l2nb > bmp->db_agl2size) { - IWRITE_LOCK(ipbmap); + IWRITE_LOCK(ipbmap, RDWRLOCK_DMAP); rc = dbAllocAny(bmp, nblocks, l2nb, results); @@ -774,7 +774,7 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results) * the hint using a tiered strategy. */ if (nblocks <= BPERDMAP) { - IREAD_LOCK(ipbmap); + IREAD_LOCK(ipbmap, RDWRLOCK_DMAP); /* get the buffer for the dmap containing the hint. */ @@ -844,7 +844,7 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results) /* try to satisfy the allocation request with blocks within * the same allocation group as the hint. */ - IWRITE_LOCK(ipbmap); + IWRITE_LOCK(ipbmap, RDWRLOCK_DMAP); if ((rc = dbAllocAG(bmp, agno, nblocks, l2nb, results)) != -ENOSPC) goto write_unlock; @@ -856,7 +856,7 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results) * Let dbNextAG recommend a preferred allocation group */ agno = dbNextAG(ipbmap); - IWRITE_LOCK(ipbmap); + IWRITE_LOCK(ipbmap, RDWRLOCK_DMAP); /* Try to allocate within this allocation group. if that fails, try to * allocate anywhere in the map. @@ -900,7 +900,7 @@ int dbAllocExact(struct inode *ip, s64 blkno, int nblocks) s64 lblkno; struct metapage *mp; - IREAD_LOCK(ipbmap); + IREAD_LOCK(ipbmap, RDWRLOCK_DMAP); /* * validate extent request: @@ -1050,7 +1050,7 @@ static int dbExtend(struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks) */ extblkno = lastblkno + 1; - IREAD_LOCK(ipbmap); + IREAD_LOCK(ipbmap, RDWRLOCK_DMAP); /* better be within the file system */ bmp = sbi->bmap; @@ -3116,7 +3116,7 @@ int dbAllocBottomUp(struct inode *ip, s64 blkno, s64 nblocks) struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap; struct bmap *bmp = JFS_SBI(ip->i_sb)->bmap; - IREAD_LOCK(ipbmap); + IREAD_LOCK(ipbmap, RDWRLOCK_DMAP); /* block to be allocated better be within the mapsize. */ ASSERT(nblocks <= bmp->db_mapsize - blkno); diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c index 53f63b47a6d3..aa5124b643b1 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -331,7 +331,7 @@ int diRead(struct inode *ip) /* read the iag */ imap = JFS_IP(ipimap)->i_imap; - IREAD_LOCK(ipimap); + IREAD_LOCK(ipimap, RDWRLOCK_IMAP); rc = diIAGRead(imap, iagno, &mp); IREAD_UNLOCK(ipimap); if (rc) { @@ -920,7 +920,7 @@ int diFree(struct inode *ip) /* Obtain read lock in imap inode. Don't release it until we have * read all of the IAG's that we are going to. */ - IREAD_LOCK(ipimap); + IREAD_LOCK(ipimap, RDWRLOCK_IMAP); /* read the iag. */ @@ -1415,7 +1415,7 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip) AG_LOCK(imap, agno); /* Get read lock on imap inode */ - IREAD_LOCK(ipimap); + IREAD_LOCK(ipimap, RDWRLOCK_IMAP); /* get the iag number and read the iag */ iagno = INOTOIAG(inum); @@ -1808,7 +1808,7 @@ static int diAllocIno(struct inomap * imap, int agno, struct inode *ip) return -ENOSPC; /* obtain read lock on imap inode */ - IREAD_LOCK(imap->im_ipimap); + IREAD_LOCK(imap->im_ipimap, RDWRLOCK_IMAP); /* read the iag at the head of the list. */ @@ -1946,7 +1946,7 @@ static int diAllocExt(struct inomap * imap, int agno, struct inode *ip) } else { /* read the iag. */ - IREAD_LOCK(imap->im_ipimap); + IREAD_LOCK(imap->im_ipimap, RDWRLOCK_IMAP); if ((rc = diIAGRead(imap, iagno, &mp))) { IREAD_UNLOCK(imap->im_ipimap); jfs_error(ip->i_sb, "diAllocExt: error reading iag"); @@ -2509,7 +2509,7 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp) */ /* acquire inode map lock */ - IWRITE_LOCK(ipimap); + IWRITE_LOCK(ipimap, RDWRLOCK_IMAP); if (ipimap->i_size >> L2PSIZE != imap->im_nextiag + 1) { IWRITE_UNLOCK(ipimap); @@ -2648,7 +2648,7 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp) } /* obtain read lock on map */ - IREAD_LOCK(ipimap); + IREAD_LOCK(ipimap, RDWRLOCK_IMAP); /* read the iag */ if ((rc = diIAGRead(imap, iagno, &mp))) { @@ -2779,7 +2779,7 @@ diUpdatePMap(struct inode *ipimap, return -EIO; } /* read the iag */ - IREAD_LOCK(ipimap); + IREAD_LOCK(ipimap, RDWRLOCK_IMAP); rc = diIAGRead(imap, iagno, &mp); IREAD_UNLOCK(ipimap); if (rc) diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h index 94005584445a..8f453eff3c83 100644 --- a/fs/jfs/jfs_incore.h +++ b/fs/jfs/jfs_incore.h @@ -109,9 +109,11 @@ struct jfs_inode_info { #define JFS_ACL_NOT_CACHED ((void *)-1) -#define IREAD_LOCK(ip) down_read(&JFS_IP(ip)->rdwrlock) +#define IREAD_LOCK(ip, subclass) \ + down_read_nested(&JFS_IP(ip)->rdwrlock, subclass) #define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock) -#define IWRITE_LOCK(ip) down_write(&JFS_IP(ip)->rdwrlock) +#define IWRITE_LOCK(ip, subclass) \ + down_write_nested(&JFS_IP(ip)->rdwrlock, subclass) #define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock) /* @@ -127,6 +129,29 @@ enum cflags { COMMIT_Synclist, /* metadata pages on group commit synclist */ }; +/* + * commit_mutex nesting subclasses: + */ +enum commit_mutex_class +{ + COMMIT_MUTEX_PARENT, + COMMIT_MUTEX_CHILD, + COMMIT_MUTEX_SECOND_PARENT, /* Renaming */ + COMMIT_MUTEX_VICTIM /* Inode being unlinked due to rename */ +}; + +/* + * rdwrlock subclasses: + * The dmap inode may be locked while a normal inode or the imap inode are + * locked. + */ +enum rdwrlock_class +{ + RDWRLOCK_NORMAL, + RDWRLOCK_IMAP, + RDWRLOCK_DMAP +}; + #define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag)) #define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag)) #define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag)) diff --git a/fs/jfs/jfs_lock.h b/fs/jfs/jfs_lock.h index 7d78e83d7c40..df48ece4b7a3 100644 --- a/fs/jfs/jfs_lock.h +++ b/fs/jfs/jfs_lock.h @@ -42,7 +42,7 @@ do { \ if (cond) \ break; \ unlock_cmd; \ - schedule(); \ + io_schedule(); \ lock_cmd; \ } \ current->state = TASK_RUNNING; \ diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c index ceaf03b94935..58deae007507 100644 --- a/fs/jfs/jfs_metapage.c +++ b/fs/jfs/jfs_metapage.c @@ -56,7 +56,7 @@ static inline void __lock_metapage(struct metapage *mp) set_current_state(TASK_UNINTERRUPTIBLE); if (metapage_locked(mp)) { unlock_page(mp->page); - schedule(); + io_schedule(); lock_page(mp->page); } } while (trylock_metapage(mp)); diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c index d558e51b0df8..6988a1082f58 100644 --- a/fs/jfs/jfs_txnmgr.c +++ b/fs/jfs/jfs_txnmgr.c @@ -135,7 +135,7 @@ static inline void TXN_SLEEP_DROP_LOCK(wait_queue_head_t * event) add_wait_queue(event, &wait); set_current_state(TASK_UNINTERRUPTIBLE); TXN_UNLOCK(); - schedule(); + io_schedule(); current->state = TASK_RUNNING; remove_wait_queue(event, &wait); } diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c index e98eb03e5310..acc97c46d8a4 100644 --- a/fs/jfs/jfs_xtree.c +++ b/fs/jfs/jfs_xtree.c @@ -757,6 +757,11 @@ static int xtSearch(struct inode *ip, s64 xoff, s64 *nextp, nsplit = 0; /* push (bn, index) of the parent page/entry */ + if (BT_STACK_FULL(btstack)) { + jfs_error(ip->i_sb, "stack overrun in xtSearch!"); + XT_PUTPAGE(mp); + return -EIO; + } BT_PUSH(btstack, bn, index); /* get the child page block number */ @@ -3915,6 +3920,11 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) */ getChild: /* save current parent entry for the child page */ + if (BT_STACK_FULL(&btstack)) { + jfs_error(ip->i_sb, "stack overrun in xtTruncate!"); + XT_PUTPAGE(mp); + return -EIO; + } BT_PUSH(&btstack, bn, index); /* get child page */ @@ -4112,6 +4122,11 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size) */ getChild: /* save current parent entry for the child page */ + if (BT_STACK_FULL(&btstack)) { + jfs_error(ip->i_sb, "stack overrun in xtTruncate_pmap!"); + XT_PUTPAGE(mp); + return -EIO; + } BT_PUSH(&btstack, bn, index); /* get child page */ diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index a6a8c16c872c..7ab47561b68d 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -104,8 +104,8 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, int mode, tid = txBegin(dip->i_sb, 0); - mutex_lock(&JFS_IP(dip)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); rc = jfs_init_acl(tid, ip, dip); if (rc) @@ -238,8 +238,8 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) tid = txBegin(dip->i_sb, 0); - mutex_lock(&JFS_IP(dip)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); rc = jfs_init_acl(tid, ip, dip); if (rc) @@ -365,8 +365,8 @@ static int jfs_rmdir(struct inode *dip, struct dentry *dentry) tid = txBegin(dip->i_sb, 0); - mutex_lock(&JFS_IP(dip)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); iplist[0] = dip; iplist[1] = ip; @@ -483,12 +483,12 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry) if ((rc = get_UCSname(&dname, dentry))) goto out; - IWRITE_LOCK(ip); + IWRITE_LOCK(ip, RDWRLOCK_NORMAL); tid = txBegin(dip->i_sb, 0); - mutex_lock(&JFS_IP(dip)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); iplist[0] = dip; iplist[1] = ip; @@ -802,8 +802,8 @@ static int jfs_link(struct dentry *old_dentry, tid = txBegin(ip->i_sb, 0); - mutex_lock(&JFS_IP(dir)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); /* * scan parent directory for entry/freespace @@ -913,8 +913,8 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry, tid = txBegin(dip->i_sb, 0); - mutex_lock(&JFS_IP(dip)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); rc = jfs_init_security(tid, ip, dip); if (rc) @@ -1127,7 +1127,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, goto out3; } } else if (new_ip) { - IWRITE_LOCK(new_ip); + IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); /* Init inode for quota operations. */ DQUOT_INIT(new_ip); } @@ -1137,13 +1137,21 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, */ tid = txBegin(new_dir->i_sb, 0); - mutex_lock(&JFS_IP(new_dir)->commit_mutex); - mutex_lock(&JFS_IP(old_ip)->commit_mutex); + /* + * How do we know the locking is safe from deadlocks? + * The vfs does the hard part for us. Any time we are taking nested + * commit_mutexes, the vfs already has i_mutex held on the parent. + * Here, the vfs has already taken i_mutex on both old_dir and new_dir. + */ + mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD); if (old_dir != new_dir) - mutex_lock(&JFS_IP(old_dir)->commit_mutex); + mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex, + COMMIT_MUTEX_SECOND_PARENT); if (new_ip) { - mutex_lock(&JFS_IP(new_ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex, + COMMIT_MUTEX_VICTIM); /* * Change existing directory entry to new inode number */ @@ -1357,8 +1365,8 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry, tid = txBegin(dir->i_sb, 0); - mutex_lock(&JFS_IP(dir)->commit_mutex); - mutex_lock(&JFS_IP(ip)->commit_mutex); + mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); + mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); rc = jfs_init_acl(tid, ip, dir); if (rc) diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index 277ca67a2ad6..5a9779bb9236 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -184,10 +184,9 @@ static void o2hb_disarm_write_timeout(struct o2hb_region *reg) flush_scheduled_work(); } -static inline void o2hb_bio_wait_init(struct o2hb_bio_wait_ctxt *wc, - unsigned int num_ios) +static inline void o2hb_bio_wait_init(struct o2hb_bio_wait_ctxt *wc) { - atomic_set(&wc->wc_num_reqs, num_ios); + atomic_set(&wc->wc_num_reqs, 1); init_completion(&wc->wc_io_complete); wc->wc_error = 0; } @@ -212,6 +211,7 @@ static void o2hb_wait_on_io(struct o2hb_region *reg, struct address_space *mapping = reg->hr_bdev->bd_inode->i_mapping; blk_run_address_space(mapping); + o2hb_bio_wait_dec(wc, 1); wait_for_completion(&wc->wc_io_complete); } @@ -231,6 +231,7 @@ static int o2hb_bio_end_io(struct bio *bio, return 1; o2hb_bio_wait_dec(wc, 1); + bio_put(bio); return 0; } @@ -238,23 +239,22 @@ static int o2hb_bio_end_io(struct bio *bio, * start_slot. */ static struct bio *o2hb_setup_one_bio(struct o2hb_region *reg, struct o2hb_bio_wait_ctxt *wc, - unsigned int start_slot, - unsigned int num_slots) + unsigned int *current_slot, + unsigned int max_slots) { - int i, nr_vecs, len, first_page, last_page; + int len, current_page; unsigned int vec_len, vec_start; unsigned int bits = reg->hr_block_bits; unsigned int spp = reg->hr_slots_per_page; + unsigned int cs = *current_slot; struct bio *bio; struct page *page; - nr_vecs = (num_slots + spp - 1) / spp; - /* Testing has shown this allocation to take long enough under * GFP_KERNEL that the local node can get fenced. It would be * nicest if we could pre-allocate these bios and avoid this * all together. */ - bio = bio_alloc(GFP_ATOMIC, nr_vecs); + bio = bio_alloc(GFP_ATOMIC, 16); if (!bio) { mlog(ML_ERROR, "Could not alloc slots BIO!\n"); bio = ERR_PTR(-ENOMEM); @@ -262,137 +262,53 @@ static struct bio *o2hb_setup_one_bio(struct o2hb_region *reg, } /* Must put everything in 512 byte sectors for the bio... */ - bio->bi_sector = (reg->hr_start_block + start_slot) << (bits - 9); + bio->bi_sector = (reg->hr_start_block + cs) << (bits - 9); bio->bi_bdev = reg->hr_bdev; bio->bi_private = wc; bio->bi_end_io = o2hb_bio_end_io; - first_page = start_slot / spp; - last_page = first_page + nr_vecs; - vec_start = (start_slot << bits) % PAGE_CACHE_SIZE; - for(i = first_page; i < last_page; i++) { - page = reg->hr_slot_data[i]; + vec_start = (cs << bits) % PAGE_CACHE_SIZE; + while(cs < max_slots) { + current_page = cs / spp; + page = reg->hr_slot_data[current_page]; - vec_len = PAGE_CACHE_SIZE; - /* last page might be short */ - if (((i + 1) * spp) > (start_slot + num_slots)) - vec_len = ((num_slots + start_slot) % spp) << bits; - vec_len -= vec_start; + vec_len = min(PAGE_CACHE_SIZE, + (max_slots-cs) * (PAGE_CACHE_SIZE/spp) ); mlog(ML_HB_BIO, "page %d, vec_len = %u, vec_start = %u\n", - i, vec_len, vec_start); + current_page, vec_len, vec_start); len = bio_add_page(bio, page, vec_len, vec_start); - if (len != vec_len) { - bio_put(bio); - bio = ERR_PTR(-EIO); - - mlog(ML_ERROR, "Error adding page to bio i = %d, " - "vec_len = %u, len = %d\n, start = %u\n", - i, vec_len, len, vec_start); - goto bail; - } + if (len != vec_len) break; + cs += vec_len / (PAGE_CACHE_SIZE/spp); vec_start = 0; } bail: + *current_slot = cs; return bio; } -/* - * Compute the maximum number of sectors the bdev can handle in one bio, - * as a power of two. - * - * Stolen from oracleasm, thanks Joel! - */ -static int compute_max_sectors(struct block_device *bdev) -{ - int max_pages, max_sectors, pow_two_sectors; - - struct request_queue *q; - - q = bdev_get_queue(bdev); - max_pages = q->max_sectors >> (PAGE_SHIFT - 9); - if (max_pages > BIO_MAX_PAGES) - max_pages = BIO_MAX_PAGES; - if (max_pages > q->max_phys_segments) - max_pages = q->max_phys_segments; - if (max_pages > q->max_hw_segments) - max_pages = q->max_hw_segments; - max_pages--; /* Handle I/Os that straddle a page */ - - if (max_pages) { - max_sectors = max_pages << (PAGE_SHIFT - 9); - } else { - /* If BIO contains 1 or less than 1 page. */ - max_sectors = q->max_sectors; - } - /* Why is fls() 1-based???? */ - pow_two_sectors = 1 << (fls(max_sectors) - 1); - - return pow_two_sectors; -} - -static inline void o2hb_compute_request_limits(struct o2hb_region *reg, - unsigned int num_slots, - unsigned int *num_bios, - unsigned int *slots_per_bio) -{ - unsigned int max_sectors, io_sectors; - - max_sectors = compute_max_sectors(reg->hr_bdev); - - io_sectors = num_slots << (reg->hr_block_bits - 9); - - *num_bios = (io_sectors + max_sectors - 1) / max_sectors; - *slots_per_bio = max_sectors >> (reg->hr_block_bits - 9); - - mlog(ML_HB_BIO, "My io size is %u sectors for %u slots. This " - "device can handle %u sectors of I/O\n", io_sectors, num_slots, - max_sectors); - mlog(ML_HB_BIO, "Will need %u bios holding %u slots each\n", - *num_bios, *slots_per_bio); -} - static int o2hb_read_slots(struct o2hb_region *reg, unsigned int max_slots) { - unsigned int num_bios, slots_per_bio, start_slot, num_slots; - int i, status; + unsigned int current_slot=0; + int status; struct o2hb_bio_wait_ctxt wc; - struct bio **bios; struct bio *bio; - o2hb_compute_request_limits(reg, max_slots, &num_bios, &slots_per_bio); + o2hb_bio_wait_init(&wc); - bios = kcalloc(num_bios, sizeof(struct bio *), GFP_KERNEL); - if (!bios) { - status = -ENOMEM; - mlog_errno(status); - return status; - } - - o2hb_bio_wait_init(&wc, num_bios); - - num_slots = slots_per_bio; - for(i = 0; i < num_bios; i++) { - start_slot = i * slots_per_bio; - - /* adjust num_slots at last bio */ - if (max_slots < (start_slot + num_slots)) - num_slots = max_slots - start_slot; - - bio = o2hb_setup_one_bio(reg, &wc, start_slot, num_slots); + while(current_slot < max_slots) { + bio = o2hb_setup_one_bio(reg, &wc, ¤t_slot, max_slots); if (IS_ERR(bio)) { - o2hb_bio_wait_dec(&wc, num_bios - i); - status = PTR_ERR(bio); mlog_errno(status); goto bail_and_wait; } - bios[i] = bio; + atomic_inc(&wc.wc_num_reqs); submit_bio(READ, bio); } @@ -403,38 +319,30 @@ bail_and_wait: if (wc.wc_error && !status) status = wc.wc_error; - if (bios) { - for(i = 0; i < num_bios; i++) - if (bios[i]) - bio_put(bios[i]); - kfree(bios); - } - return status; } static int o2hb_issue_node_write(struct o2hb_region *reg, - struct bio **write_bio, struct o2hb_bio_wait_ctxt *write_wc) { int status; unsigned int slot; struct bio *bio; - o2hb_bio_wait_init(write_wc, 1); + o2hb_bio_wait_init(write_wc); slot = o2nm_this_node(); - bio = o2hb_setup_one_bio(reg, write_wc, slot, 1); + bio = o2hb_setup_one_bio(reg, write_wc, &slot, slot+1); if (IS_ERR(bio)) { status = PTR_ERR(bio); mlog_errno(status); goto bail; } + atomic_inc(&write_wc->wc_num_reqs); submit_bio(WRITE, bio); - *write_bio = bio; status = 0; bail: return status; @@ -826,7 +734,6 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg) { int i, ret, highest_node, change = 0; unsigned long configured_nodes[BITS_TO_LONGS(O2NM_MAX_NODES)]; - struct bio *write_bio; struct o2hb_bio_wait_ctxt write_wc; ret = o2nm_configured_node_map(configured_nodes, @@ -864,7 +771,7 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg) /* And fire off the write. Note that we don't wait on this I/O * until later. */ - ret = o2hb_issue_node_write(reg, &write_bio, &write_wc); + ret = o2hb_issue_node_write(reg, &write_wc); if (ret < 0) { mlog_errno(ret); return ret; @@ -882,7 +789,6 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg) * people we find in our steady state have seen us. */ o2hb_wait_on_io(reg, &write_wc); - bio_put(write_bio); if (write_wc.wc_error) { /* Do not re-arm the write timeout on I/O error - we * can't be sure that the new block ever made it to @@ -943,7 +849,6 @@ static int o2hb_thread(void *data) { int i, ret; struct o2hb_region *reg = data; - struct bio *write_bio; struct o2hb_bio_wait_ctxt write_wc; struct timeval before_hb, after_hb; unsigned int elapsed_msec; @@ -993,10 +898,9 @@ static int o2hb_thread(void *data) * * XXX: Should we skip this on unclean_stop? */ o2hb_prepare_block(reg, 0); - ret = o2hb_issue_node_write(reg, &write_bio, &write_wc); + ret = o2hb_issue_node_write(reg, &write_wc); if (ret == 0) { o2hb_wait_on_io(reg, &write_wc); - bio_put(write_bio); } else { mlog_errno(ret); } diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c index ae4ff4a6636b..1718215fc018 100644 --- a/fs/ocfs2/cluster/tcp.c +++ b/fs/ocfs2/cluster/tcp.c @@ -556,6 +556,8 @@ static void o2net_register_callbacks(struct sock *sk, sk->sk_data_ready = o2net_data_ready; sk->sk_state_change = o2net_state_change; + mutex_init(&sc->sc_send_lock); + write_unlock_bh(&sk->sk_callback_lock); } @@ -688,6 +690,7 @@ static void o2net_handler_put(struct o2net_msg_handler *nmh) * be given to the handler if their payload is longer than the max. */ int o2net_register_handler(u32 msg_type, u32 key, u32 max_len, o2net_msg_handler_func *func, void *data, + o2net_post_msg_handler_func *post_func, struct list_head *unreg_list) { struct o2net_msg_handler *nmh = NULL; @@ -722,6 +725,7 @@ int o2net_register_handler(u32 msg_type, u32 key, u32 max_len, nmh->nh_func = func; nmh->nh_func_data = data; + nmh->nh_post_func = post_func; nmh->nh_msg_type = msg_type; nmh->nh_max_len = max_len; nmh->nh_key = key; @@ -856,10 +860,12 @@ static void o2net_sendpage(struct o2net_sock_container *sc, ssize_t ret; + mutex_lock(&sc->sc_send_lock); ret = sc->sc_sock->ops->sendpage(sc->sc_sock, virt_to_page(kmalloced_virt), (long)kmalloced_virt & ~PAGE_MASK, size, MSG_DONTWAIT); + mutex_unlock(&sc->sc_send_lock); if (ret != size) { mlog(ML_ERROR, "sendpage of size %zu to " SC_NODEF_FMT " failed with %zd\n", size, SC_NODEF_ARGS(sc), ret); @@ -974,8 +980,10 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec, /* finally, convert the message header to network byte-order * and send */ + mutex_lock(&sc->sc_send_lock); ret = o2net_send_tcp_msg(sc->sc_sock, vec, veclen, sizeof(struct o2net_msg) + caller_bytes); + mutex_unlock(&sc->sc_send_lock); msglog(msg, "sending returned %d\n", ret); if (ret < 0) { mlog(0, "error returned from o2net_send_tcp_msg=%d\n", ret); @@ -1049,6 +1057,7 @@ static int o2net_process_message(struct o2net_sock_container *sc, int ret = 0, handler_status; enum o2net_system_error syserr; struct o2net_msg_handler *nmh = NULL; + void *ret_data = NULL; msglog(hdr, "processing message\n"); @@ -1101,17 +1110,26 @@ static int o2net_process_message(struct o2net_sock_container *sc, sc->sc_msg_type = be16_to_cpu(hdr->msg_type); handler_status = (nmh->nh_func)(hdr, sizeof(struct o2net_msg) + be16_to_cpu(hdr->data_len), - nmh->nh_func_data); + nmh->nh_func_data, &ret_data); do_gettimeofday(&sc->sc_tv_func_stop); out_respond: /* this destroys the hdr, so don't use it after this */ + mutex_lock(&sc->sc_send_lock); ret = o2net_send_status_magic(sc->sc_sock, hdr, syserr, handler_status); + mutex_unlock(&sc->sc_send_lock); hdr = NULL; mlog(0, "sending handler status %d, syserr %d returned %d\n", handler_status, syserr, ret); + if (nmh) { + BUG_ON(ret_data != NULL && nmh->nh_post_func == NULL); + if (nmh->nh_post_func) + (nmh->nh_post_func)(handler_status, nmh->nh_func_data, + ret_data); + } + out: if (nmh) o2net_handler_put(nmh); @@ -1795,13 +1813,13 @@ out: ready(sk, bytes); } -static int o2net_open_listening_sock(__be16 port) +static int o2net_open_listening_sock(__be32 addr, __be16 port) { struct socket *sock = NULL; int ret; struct sockaddr_in sin = { .sin_family = PF_INET, - .sin_addr = { .s_addr = (__force u32)htonl(INADDR_ANY) }, + .sin_addr = { .s_addr = (__force u32)addr }, .sin_port = (__force u16)port, }; @@ -1824,15 +1842,15 @@ static int o2net_open_listening_sock(__be16 port) sock->sk->sk_reuse = 1; ret = sock->ops->bind(sock, (struct sockaddr *)&sin, sizeof(sin)); if (ret < 0) { - mlog(ML_ERROR, "unable to bind socket to port %d, ret=%d\n", - ntohs(port), ret); + mlog(ML_ERROR, "unable to bind socket at %u.%u.%u.%u:%u, " + "ret=%d\n", NIPQUAD(addr), ntohs(port), ret); goto out; } ret = sock->ops->listen(sock, 64); if (ret < 0) { - mlog(ML_ERROR, "unable to listen on port %d, ret=%d\n", - ntohs(port), ret); + mlog(ML_ERROR, "unable to listen on %u.%u.%u.%u:%u, ret=%d\n", + NIPQUAD(addr), ntohs(port), ret); } out: @@ -1865,7 +1883,8 @@ int o2net_start_listening(struct o2nm_node *node) return -ENOMEM; /* ? */ } - ret = o2net_open_listening_sock(node->nd_ipv4_port); + ret = o2net_open_listening_sock(node->nd_ipv4_address, + node->nd_ipv4_port); if (ret) { destroy_workqueue(o2net_wq); o2net_wq = NULL; diff --git a/fs/ocfs2/cluster/tcp.h b/fs/ocfs2/cluster/tcp.h index 21a4e43df836..da880fc215f0 100644 --- a/fs/ocfs2/cluster/tcp.h +++ b/fs/ocfs2/cluster/tcp.h @@ -50,7 +50,10 @@ struct o2net_msg __u8 buf[0]; }; -typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data); +typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +typedef void (o2net_post_msg_handler_func)(int status, void *data, + void *ret_data); #define O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct o2net_msg)) @@ -99,6 +102,7 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec, int o2net_register_handler(u32 msg_type, u32 key, u32 max_len, o2net_msg_handler_func *func, void *data, + o2net_post_msg_handler_func *post_func, struct list_head *unreg_list); void o2net_unregister_handler_list(struct list_head *list); diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h index b700dc9624d1..4dae5df5e467 100644 --- a/fs/ocfs2/cluster/tcp_internal.h +++ b/fs/ocfs2/cluster/tcp_internal.h @@ -38,6 +38,12 @@ * locking semantics of the file system using the protocol. It should * be somewhere else, I'm sure, but right now it isn't. * + * New in version 7: + * - DLM join domain includes the live nodemap + * + * New in version 6: + * - DLM lockres remote refcount fixes. + * * New in version 5: * - Network timeout checking protocol * @@ -51,7 +57,7 @@ * - full 64 bit i_size in the metadata lock lvbs * - introduction of "rw" lock and pushing meta/data locking down */ -#define O2NET_PROTOCOL_VERSION 5ULL +#define O2NET_PROTOCOL_VERSION 7ULL struct o2net_handshake { __be64 protocol_version; __be64 connector_id; @@ -149,6 +155,8 @@ struct o2net_sock_container { struct timeval sc_tv_func_stop; u32 sc_msg_key; u16 sc_msg_type; + + struct mutex sc_send_lock; }; struct o2net_msg_handler { @@ -158,6 +166,8 @@ struct o2net_msg_handler { u32 nh_key; o2net_msg_handler_func *nh_func; o2net_msg_handler_func *nh_func_data; + o2net_post_msg_handler_func + *nh_post_func; struct kref nh_kref; struct list_head nh_unregister_item; }; diff --git a/fs/ocfs2/dlm/dlmast.c b/fs/ocfs2/dlm/dlmast.c index 681046d51393..241cad342a48 100644 --- a/fs/ocfs2/dlm/dlmast.c +++ b/fs/ocfs2/dlm/dlmast.c @@ -263,7 +263,8 @@ void dlm_do_local_bast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, -int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { int ret; unsigned int locklen; @@ -311,8 +312,8 @@ int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data) past->type != DLM_BAST) { mlog(ML_ERROR, "Unknown ast type! %d, cookie=%u:%llu" "name=%.*s\n", past->type, - dlm_get_lock_cookie_node(cookie), - dlm_get_lock_cookie_seq(cookie), + dlm_get_lock_cookie_node(be64_to_cpu(cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(cookie)), locklen, name); ret = DLM_IVLOCKID; goto leave; @@ -323,8 +324,8 @@ int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data) mlog(0, "got %sast for unknown lockres! " "cookie=%u:%llu, name=%.*s, namelen=%u\n", past->type == DLM_AST ? "" : "b", - dlm_get_lock_cookie_node(cookie), - dlm_get_lock_cookie_seq(cookie), + dlm_get_lock_cookie_node(be64_to_cpu(cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(cookie)), locklen, name, locklen); ret = DLM_IVLOCKID; goto leave; @@ -369,7 +370,8 @@ int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data) mlog(0, "got %sast for unknown lock! cookie=%u:%llu, " "name=%.*s, namelen=%u\n", past->type == DLM_AST ? "" : "b", - dlm_get_lock_cookie_node(cookie), dlm_get_lock_cookie_seq(cookie), + dlm_get_lock_cookie_node(be64_to_cpu(cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(cookie)), locklen, name, locklen); ret = DLM_NORMAL; diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 6b6ff76538c5..e90b92f9ece1 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -180,6 +180,11 @@ struct dlm_assert_master_priv unsigned ignore_higher:1; }; +struct dlm_deref_lockres_priv +{ + struct dlm_lock_resource *deref_res; + u8 deref_node; +}; struct dlm_work_item { @@ -191,6 +196,7 @@ struct dlm_work_item struct dlm_request_all_locks_priv ral; struct dlm_mig_lockres_priv ml; struct dlm_assert_master_priv am; + struct dlm_deref_lockres_priv dl; } u; }; @@ -222,6 +228,9 @@ static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm, #define DLM_LOCK_RES_DIRTY 0x00000008 #define DLM_LOCK_RES_IN_PROGRESS 0x00000010 #define DLM_LOCK_RES_MIGRATING 0x00000020 +#define DLM_LOCK_RES_DROPPING_REF 0x00000040 +#define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000 +#define DLM_LOCK_RES_SETREF_INPROG 0x00002000 /* max milliseconds to wait to sync up a network failure with a node death */ #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000) @@ -265,6 +274,8 @@ struct dlm_lock_resource u8 owner; //node which owns the lock resource, or unknown u16 state; char lvb[DLM_LVB_LEN]; + unsigned int inflight_locks; + unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)]; }; struct dlm_migratable_lock @@ -367,7 +378,7 @@ enum { DLM_CONVERT_LOCK_MSG, /* 504 */ DLM_PROXY_AST_MSG, /* 505 */ DLM_UNLOCK_LOCK_MSG, /* 506 */ - DLM_UNUSED_MSG2, /* 507 */ + DLM_DEREF_LOCKRES_MSG, /* 507 */ DLM_MIGRATE_REQUEST_MSG, /* 508 */ DLM_MIG_LOCKRES_MSG, /* 509 */ DLM_QUERY_JOIN_MSG, /* 510 */ @@ -417,6 +428,9 @@ struct dlm_master_request u8 name[O2NM_MAX_NAME_LEN]; }; +#define DLM_ASSERT_RESPONSE_REASSERT 0x00000001 +#define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002 + #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001 #define DLM_ASSERT_MASTER_REQUERY 0x00000002 #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004 @@ -430,6 +444,8 @@ struct dlm_assert_master u8 name[O2NM_MAX_NAME_LEN]; }; +#define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001 + struct dlm_migrate_request { u8 master; @@ -609,12 +625,16 @@ struct dlm_begin_reco }; +#define BITS_PER_BYTE 8 +#define BITS_TO_BYTES(bits) (((bits)+BITS_PER_BYTE-1)/BITS_PER_BYTE) + struct dlm_query_join_request { u8 node_idx; u8 pad1[2]; u8 name_len; u8 domain[O2NM_MAX_NAME_LEN]; + u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)]; }; struct dlm_assert_joined @@ -648,6 +668,16 @@ struct dlm_finalize_reco __be32 pad2; }; +struct dlm_deref_lockres +{ + u32 pad1; + u16 pad2; + u8 node_idx; + u8 namelen; + + u8 name[O2NM_MAX_NAME_LEN]; +}; + static inline enum dlm_status __dlm_lockres_state_to_status(struct dlm_lock_resource *res) { @@ -688,16 +718,20 @@ void dlm_lock_put(struct dlm_lock *lock); void dlm_lock_attach_lockres(struct dlm_lock *lock, struct dlm_lock_resource *res); -int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data); +int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); void dlm_revert_pending_convert(struct dlm_lock_resource *res, struct dlm_lock *lock); void dlm_revert_pending_lock(struct dlm_lock_resource *res, struct dlm_lock *lock); -int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data); +int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); void dlm_commit_pending_cancel(struct dlm_lock_resource *res, struct dlm_lock *lock); void dlm_commit_pending_unlock(struct dlm_lock_resource *res, @@ -721,8 +755,6 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); void dlm_lockres_calc_usage(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); -void dlm_purge_lockres(struct dlm_ctxt *dlm, - struct dlm_lock_resource *lockres); static inline void dlm_lockres_get(struct dlm_lock_resource *res) { /* This is called on every lookup, so it might be worth @@ -733,6 +765,10 @@ void dlm_lockres_put(struct dlm_lock_resource *res); void __dlm_unhash_lockres(struct dlm_lock_resource *res); void __dlm_insert_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); +struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm, + const char *name, + unsigned int len, + unsigned int hash); struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, const char *name, unsigned int len, @@ -753,6 +789,47 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, const char *name, unsigned int namelen); +#define dlm_lockres_set_refmap_bit(bit,res) \ + __dlm_lockres_set_refmap_bit(bit,res,__FILE__,__LINE__) +#define dlm_lockres_clear_refmap_bit(bit,res) \ + __dlm_lockres_clear_refmap_bit(bit,res,__FILE__,__LINE__) + +static inline void __dlm_lockres_set_refmap_bit(int bit, + struct dlm_lock_resource *res, + const char *file, + int line) +{ + //printk("%s:%d:%.*s: setting bit %d\n", file, line, + // res->lockname.len, res->lockname.name, bit); + set_bit(bit, res->refmap); +} + +static inline void __dlm_lockres_clear_refmap_bit(int bit, + struct dlm_lock_resource *res, + const char *file, + int line) +{ + //printk("%s:%d:%.*s: clearing bit %d\n", file, line, + // res->lockname.len, res->lockname.name, bit); + clear_bit(bit, res->refmap); +} + +void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + const char *file, + int line); +void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + int new_lockres, + const char *file, + int line); +#define dlm_lockres_drop_inflight_ref(d,r) \ + __dlm_lockres_drop_inflight_ref(d,r,__FILE__,__LINE__) +#define dlm_lockres_grab_inflight_ref(d,r) \ + __dlm_lockres_grab_inflight_ref(d,r,0,__FILE__,__LINE__) +#define dlm_lockres_grab_inflight_ref_new(d,r) \ + __dlm_lockres_grab_inflight_ref(d,r,1,__FILE__,__LINE__) + void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock); void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock); void dlm_do_local_ast(struct dlm_ctxt *dlm, @@ -801,10 +878,7 @@ int dlm_heartbeat_init(struct dlm_ctxt *dlm); void dlm_hb_node_down_cb(struct o2nm_node *node, int idx, void *data); void dlm_hb_node_up_cb(struct o2nm_node *node, int idx, void *data); -int dlm_lockres_is_dirty(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); -int dlm_migrate_lockres(struct dlm_ctxt *dlm, - struct dlm_lock_resource *res, - u8 target); +int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); int dlm_finish_migration(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, u8 old_master); @@ -812,15 +886,27 @@ void dlm_lockres_release_ast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res); void __dlm_lockres_reserve_ast(struct dlm_lock_resource *res); -int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data); -int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data); +int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +void dlm_assert_master_post_handler(int status, void *data, void *ret_data); +int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, u8 nodenum, u8 *real_master); @@ -856,10 +942,12 @@ static inline void __dlm_wait_on_lockres(struct dlm_lock_resource *res) int dlm_init_mle_cache(void); void dlm_destroy_mle_cache(void); void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up); +int dlm_drop_lockres_ref(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res); void dlm_clean_master_list(struct dlm_ctxt *dlm, u8 dead_node); int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock); - +int __dlm_lockres_has_locks(struct dlm_lock_resource *res); int __dlm_lockres_unused(struct dlm_lock_resource *res); static inline const char * dlm_lock_mode_name(int mode) diff --git a/fs/ocfs2/dlm/dlmconvert.c b/fs/ocfs2/dlm/dlmconvert.c index c764dc8e40a2..ecb4d997221e 100644 --- a/fs/ocfs2/dlm/dlmconvert.c +++ b/fs/ocfs2/dlm/dlmconvert.c @@ -286,8 +286,8 @@ enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm, __dlm_print_one_lock_resource(res); mlog(ML_ERROR, "converting a remote lock that is already " "converting! (cookie=%u:%llu, conv=%d)\n", - dlm_get_lock_cookie_node(lock->ml.cookie), - dlm_get_lock_cookie_seq(lock->ml.cookie), + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), lock->ml.convert_type); status = DLM_DENIED; goto bail; @@ -418,7 +418,8 @@ static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm, * returns: DLM_NORMAL, DLM_IVLOCKID, DLM_BADARGS, * status from __dlmconvert_master */ -int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_convert_lock *cnv = (struct dlm_convert_lock *)msg->buf; @@ -428,7 +429,7 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) struct dlm_lockstatus *lksb; enum dlm_status status = DLM_NORMAL; u32 flags; - int call_ast = 0, kick_thread = 0, ast_reserved = 0; + int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0; if (!dlm_grab(dlm)) { dlm_error(DLM_REJECTED); @@ -479,25 +480,14 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) } lock = NULL; } - if (!lock) { - __dlm_print_one_lock_resource(res); - list_for_each(iter, &res->granted) { - lock = list_entry(iter, struct dlm_lock, list); - if (lock->ml.node == cnv->node_idx) { - mlog(ML_ERROR, "There is something here " - "for node %u, lock->ml.cookie=%llu, " - "cnv->cookie=%llu\n", cnv->node_idx, - (unsigned long long)lock->ml.cookie, - (unsigned long long)cnv->cookie); - break; - } - } - lock = NULL; - } spin_unlock(&res->spinlock); if (!lock) { status = DLM_IVLOCKID; - dlm_error(status); + mlog(ML_ERROR, "did not find lock to convert on grant queue! " + "cookie=%u:%llu\n", + dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie))); + __dlm_print_one_lock_resource(res); goto leave; } @@ -524,8 +514,11 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) cnv->requested_type, &call_ast, &kick_thread); res->state &= ~DLM_LOCK_RES_IN_PROGRESS; + wake = 1; } spin_unlock(&res->spinlock); + if (wake) + wake_up(&res->wq); if (status != DLM_NORMAL) { if (status != DLM_NOTQUEUED) @@ -534,12 +527,7 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) } leave: - if (!lock) - mlog(ML_ERROR, "did not find lock to convert on grant queue! " - "cookie=%u:%llu\n", - dlm_get_lock_cookie_node(cnv->cookie), - dlm_get_lock_cookie_seq(cnv->cookie)); - else + if (lock) dlm_lock_put(lock); /* either queue the ast or release it, if reserved */ diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c index 3f6c8d88f7af..64239b37e5d4 100644 --- a/fs/ocfs2/dlm/dlmdebug.c +++ b/fs/ocfs2/dlm/dlmdebug.c @@ -53,6 +53,23 @@ void dlm_print_one_lock_resource(struct dlm_lock_resource *res) spin_unlock(&res->spinlock); } +static void dlm_print_lockres_refmap(struct dlm_lock_resource *res) +{ + int bit; + assert_spin_locked(&res->spinlock); + + mlog(ML_NOTICE, " refmap nodes: [ "); + bit = 0; + while (1) { + bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit); + if (bit >= O2NM_MAX_NODES) + break; + printk("%u ", bit); + bit++; + } + printk("], inflight=%u\n", res->inflight_locks); +} + void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) { struct list_head *iter2; @@ -65,6 +82,7 @@ void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) res->owner, res->state); mlog(ML_NOTICE, " last used: %lu, on purge list: %s\n", res->last_used, list_empty(&res->purge) ? "no" : "yes"); + dlm_print_lockres_refmap(res); mlog(ML_NOTICE, " granted queue: \n"); list_for_each(iter2, &res->granted) { lock = list_entry(iter2, struct dlm_lock, list); @@ -72,8 +90,8 @@ void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) mlog(ML_NOTICE, " type=%d, conv=%d, node=%u, " "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c)\n", lock->ml.type, lock->ml.convert_type, lock->ml.node, - dlm_get_lock_cookie_node(lock->ml.cookie), - dlm_get_lock_cookie_seq(lock->ml.cookie), + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), list_empty(&lock->ast_list) ? 'y' : 'n', lock->ast_pending ? 'y' : 'n', list_empty(&lock->bast_list) ? 'y' : 'n', @@ -87,8 +105,8 @@ void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) mlog(ML_NOTICE, " type=%d, conv=%d, node=%u, " "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c)\n", lock->ml.type, lock->ml.convert_type, lock->ml.node, - dlm_get_lock_cookie_node(lock->ml.cookie), - dlm_get_lock_cookie_seq(lock->ml.cookie), + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), list_empty(&lock->ast_list) ? 'y' : 'n', lock->ast_pending ? 'y' : 'n', list_empty(&lock->bast_list) ? 'y' : 'n', @@ -102,8 +120,8 @@ void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) mlog(ML_NOTICE, " type=%d, conv=%d, node=%u, " "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c)\n", lock->ml.type, lock->ml.convert_type, lock->ml.node, - dlm_get_lock_cookie_node(lock->ml.cookie), - dlm_get_lock_cookie_seq(lock->ml.cookie), + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), list_empty(&lock->ast_list) ? 'y' : 'n', lock->ast_pending ? 'y' : 'n', list_empty(&lock->bast_list) ? 'y' : 'n', diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index f0b25f2dd205..6087c4749fee 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -48,6 +48,36 @@ #define MLOG_MASK_PREFIX (ML_DLM|ML_DLM_DOMAIN) #include "cluster/masklog.h" +/* + * ocfs2 node maps are array of long int, which limits to send them freely + * across the wire due to endianness issues. To workaround this, we convert + * long ints to byte arrays. Following 3 routines are helper functions to + * set/test/copy bits within those array of bytes + */ +static inline void byte_set_bit(u8 nr, u8 map[]) +{ + map[nr >> 3] |= (1UL << (nr & 7)); +} + +static inline int byte_test_bit(u8 nr, u8 map[]) +{ + return ((1UL << (nr & 7)) & (map[nr >> 3])) != 0; +} + +static inline void byte_copymap(u8 dmap[], unsigned long smap[], + unsigned int sz) +{ + unsigned int nn; + + if (!sz) + return; + + memset(dmap, 0, ((sz + 7) >> 3)); + for (nn = 0 ; nn < sz; nn++) + if (test_bit(nn, smap)) + byte_set_bit(nn, dmap); +} + static void dlm_free_pagevec(void **vec, int pages) { while (pages--) @@ -95,10 +125,14 @@ static DECLARE_WAIT_QUEUE_HEAD(dlm_domain_events); #define DLM_DOMAIN_BACKOFF_MS 200 -static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data); -static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data); -static int dlm_cancel_join_handler(struct o2net_msg *msg, u32 len, void *data); -static int dlm_exit_domain_handler(struct o2net_msg *msg, u32 len, void *data); +static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +static int dlm_cancel_join_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); +static int dlm_exit_domain_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data); static void dlm_unregister_domain_handlers(struct dlm_ctxt *dlm); @@ -125,10 +159,10 @@ void __dlm_insert_lockres(struct dlm_ctxt *dlm, hlist_add_head(&res->hash_node, bucket); } -struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, - const char *name, - unsigned int len, - unsigned int hash) +struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm, + const char *name, + unsigned int len, + unsigned int hash) { struct hlist_head *bucket; struct hlist_node *list; @@ -154,6 +188,37 @@ struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, return NULL; } +/* intended to be called by functions which do not care about lock + * resources which are being purged (most net _handler functions). + * this will return NULL for any lock resource which is found but + * currently in the process of dropping its mastery reference. + * use __dlm_lookup_lockres_full when you need the lock resource + * regardless (e.g. dlm_get_lock_resource) */ +struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm, + const char *name, + unsigned int len, + unsigned int hash) +{ + struct dlm_lock_resource *res = NULL; + + mlog_entry("%.*s\n", len, name); + + assert_spin_locked(&dlm->spinlock); + + res = __dlm_lookup_lockres_full(dlm, name, len, hash); + if (res) { + spin_lock(&res->spinlock); + if (res->state & DLM_LOCK_RES_DROPPING_REF) { + spin_unlock(&res->spinlock); + dlm_lockres_put(res); + return NULL; + } + spin_unlock(&res->spinlock); + } + + return res; +} + struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm, const char *name, unsigned int len) @@ -330,43 +395,60 @@ static void dlm_complete_dlm_shutdown(struct dlm_ctxt *dlm) wake_up(&dlm_domain_events); } -static void dlm_migrate_all_locks(struct dlm_ctxt *dlm) +static int dlm_migrate_all_locks(struct dlm_ctxt *dlm) { - int i; + int i, num, n, ret = 0; struct dlm_lock_resource *res; + struct hlist_node *iter; + struct hlist_head *bucket; + int dropped; mlog(0, "Migrating locks from domain %s\n", dlm->name); -restart: + + num = 0; spin_lock(&dlm->spinlock); for (i = 0; i < DLM_HASH_BUCKETS; i++) { - while (!hlist_empty(dlm_lockres_hash(dlm, i))) { - res = hlist_entry(dlm_lockres_hash(dlm, i)->first, - struct dlm_lock_resource, hash_node); - /* need reference when manually grabbing lockres */ +redo_bucket: + n = 0; + bucket = dlm_lockres_hash(dlm, i); + iter = bucket->first; + while (iter) { + n++; + res = hlist_entry(iter, struct dlm_lock_resource, + hash_node); dlm_lockres_get(res); - /* this should unhash the lockres - * and exit with dlm->spinlock */ - mlog(0, "purging res=%p\n", res); - if (dlm_lockres_is_dirty(dlm, res)) { - /* HACK! this should absolutely go. - * need to figure out why some empty - * lockreses are still marked dirty */ - mlog(ML_ERROR, "lockres %.*s dirty!\n", - res->lockname.len, res->lockname.name); - - spin_unlock(&dlm->spinlock); - dlm_kick_thread(dlm, res); - wait_event(dlm->ast_wq, !dlm_lockres_is_dirty(dlm, res)); - dlm_lockres_put(res); - goto restart; - } - dlm_purge_lockres(dlm, res); + /* migrate, if necessary. this will drop the dlm + * spinlock and retake it if it does migration. */ + dropped = dlm_empty_lockres(dlm, res); + + spin_lock(&res->spinlock); + __dlm_lockres_calc_usage(dlm, res); + iter = res->hash_node.next; + spin_unlock(&res->spinlock); + dlm_lockres_put(res); + + cond_resched_lock(&dlm->spinlock); + + if (dropped) + goto redo_bucket; } + num += n; + mlog(0, "%s: touched %d lockreses in bucket %d " + "(tot=%d)\n", dlm->name, n, i, num); } spin_unlock(&dlm->spinlock); - + wake_up(&dlm->dlm_thread_wq); + + /* let the dlm thread take care of purging, keep scanning until + * nothing remains in the hash */ + if (num) { + mlog(0, "%s: %d lock resources in hash last pass\n", + dlm->name, num); + ret = -EAGAIN; + } mlog(0, "DONE Migrating locks from domain %s\n", dlm->name); + return ret; } static int dlm_no_joining_node(struct dlm_ctxt *dlm) @@ -418,7 +500,8 @@ static void __dlm_print_nodes(struct dlm_ctxt *dlm) printk("\n"); } -static int dlm_exit_domain_handler(struct o2net_msg *msg, u32 len, void *data) +static int dlm_exit_domain_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; unsigned int node; @@ -571,7 +654,9 @@ void dlm_unregister_domain(struct dlm_ctxt *dlm) /* We changed dlm state, notify the thread */ dlm_kick_thread(dlm, NULL); - dlm_migrate_all_locks(dlm); + while (dlm_migrate_all_locks(dlm)) { + mlog(0, "%s: more migration to do\n", dlm->name); + } dlm_mark_domain_leaving(dlm); dlm_leave_domain(dlm); dlm_complete_dlm_shutdown(dlm); @@ -580,11 +665,13 @@ void dlm_unregister_domain(struct dlm_ctxt *dlm) } EXPORT_SYMBOL_GPL(dlm_unregister_domain); -static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data) +static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_query_join_request *query; enum dlm_query_join_response response; struct dlm_ctxt *dlm = NULL; + u8 nodenum; query = (struct dlm_query_join_request *) msg->buf; @@ -608,6 +695,28 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data) spin_lock(&dlm_domain_lock); dlm = __dlm_lookup_domain_full(query->domain, query->name_len); + if (!dlm) + goto unlock_respond; + + /* + * There is a small window where the joining node may not see the + * node(s) that just left but still part of the cluster. DISALLOW + * join request if joining node has different node map. + */ + nodenum=0; + while (nodenum < O2NM_MAX_NODES) { + if (test_bit(nodenum, dlm->domain_map)) { + if (!byte_test_bit(nodenum, query->node_map)) { + mlog(0, "disallow join as node %u does not " + "have node %u in its nodemap\n", + query->node_idx, nodenum); + response = JOIN_DISALLOW; + goto unlock_respond; + } + } + nodenum++; + } + /* Once the dlm ctxt is marked as leaving then we don't want * to be put in someone's domain map. * Also, explicitly disallow joining at certain troublesome @@ -626,15 +735,15 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data) /* Disallow parallel joins. */ response = JOIN_DISALLOW; } else if (dlm->reco.state & DLM_RECO_STATE_ACTIVE) { - mlog(ML_NOTICE, "node %u trying to join, but recovery " + mlog(0, "node %u trying to join, but recovery " "is ongoing.\n", bit); response = JOIN_DISALLOW; } else if (test_bit(bit, dlm->recovery_map)) { - mlog(ML_NOTICE, "node %u trying to join, but it " + mlog(0, "node %u trying to join, but it " "still needs recovery.\n", bit); response = JOIN_DISALLOW; } else if (test_bit(bit, dlm->domain_map)) { - mlog(ML_NOTICE, "node %u trying to join, but it " + mlog(0, "node %u trying to join, but it " "is still in the domain! needs recovery?\n", bit); response = JOIN_DISALLOW; @@ -649,6 +758,7 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data) spin_unlock(&dlm->spinlock); } +unlock_respond: spin_unlock(&dlm_domain_lock); respond: @@ -657,7 +767,8 @@ respond: return response; } -static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data) +static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_assert_joined *assert; struct dlm_ctxt *dlm = NULL; @@ -694,7 +805,8 @@ static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data) return 0; } -static int dlm_cancel_join_handler(struct o2net_msg *msg, u32 len, void *data) +static int dlm_cancel_join_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_cancel_join *cancel; struct dlm_ctxt *dlm = NULL; @@ -796,6 +908,9 @@ static int dlm_request_join(struct dlm_ctxt *dlm, join_msg.name_len = strlen(dlm->name); memcpy(join_msg.domain, dlm->name, join_msg.name_len); + /* copy live node map to join message */ + byte_copymap(join_msg.node_map, dlm->live_nodes_map, O2NM_MAX_NODES); + status = o2net_send_message(DLM_QUERY_JOIN_MSG, DLM_MOD_KEY, &join_msg, sizeof(join_msg), node, &retval); if (status < 0 && status != -ENOPROTOOPT) { @@ -1036,98 +1151,106 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm) status = o2net_register_handler(DLM_MASTER_REQUEST_MSG, dlm->key, sizeof(struct dlm_master_request), dlm_master_request_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_ASSERT_MASTER_MSG, dlm->key, sizeof(struct dlm_assert_master), dlm_assert_master_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, dlm_assert_master_post_handler, + &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_CREATE_LOCK_MSG, dlm->key, sizeof(struct dlm_create_lock), dlm_create_lock_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_CONVERT_LOCK_MSG, dlm->key, DLM_CONVERT_LOCK_MAX_LEN, dlm_convert_lock_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_UNLOCK_LOCK_MSG, dlm->key, DLM_UNLOCK_LOCK_MAX_LEN, dlm_unlock_lock_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_PROXY_AST_MSG, dlm->key, DLM_PROXY_AST_MAX_LEN, dlm_proxy_ast_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_EXIT_DOMAIN_MSG, dlm->key, sizeof(struct dlm_exit_domain), dlm_exit_domain_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); + if (status) + goto bail; + + status = o2net_register_handler(DLM_DEREF_LOCKRES_MSG, dlm->key, + sizeof(struct dlm_deref_lockres), + dlm_deref_lockres_handler, + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_MIGRATE_REQUEST_MSG, dlm->key, sizeof(struct dlm_migrate_request), dlm_migrate_request_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_MIG_LOCKRES_MSG, dlm->key, DLM_MIG_LOCKRES_MAX_LEN, dlm_mig_lockres_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_MASTER_REQUERY_MSG, dlm->key, sizeof(struct dlm_master_requery), dlm_master_requery_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_LOCK_REQUEST_MSG, dlm->key, sizeof(struct dlm_lock_request), dlm_request_all_locks_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_RECO_DATA_DONE_MSG, dlm->key, sizeof(struct dlm_reco_data_done), dlm_reco_data_done_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_BEGIN_RECO_MSG, dlm->key, sizeof(struct dlm_begin_reco), dlm_begin_reco_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; status = o2net_register_handler(DLM_FINALIZE_RECO_MSG, dlm->key, sizeof(struct dlm_finalize_reco), dlm_finalize_reco_handler, - dlm, &dlm->dlm_domain_handlers); + dlm, NULL, &dlm->dlm_domain_handlers); if (status) goto bail; @@ -1141,6 +1264,8 @@ bail: static int dlm_join_domain(struct dlm_ctxt *dlm) { int status; + unsigned int backoff; + unsigned int total_backoff = 0; BUG_ON(!dlm); @@ -1172,18 +1297,27 @@ static int dlm_join_domain(struct dlm_ctxt *dlm) } do { - unsigned int backoff; status = dlm_try_to_join_domain(dlm); /* If we're racing another node to the join, then we * need to back off temporarily and let them * complete. */ +#define DLM_JOIN_TIMEOUT_MSECS 90000 if (status == -EAGAIN) { if (signal_pending(current)) { status = -ERESTARTSYS; goto bail; } + if (total_backoff > + msecs_to_jiffies(DLM_JOIN_TIMEOUT_MSECS)) { + status = -ERESTARTSYS; + mlog(ML_NOTICE, "Timed out joining dlm domain " + "%s after %u msecs\n", dlm->name, + jiffies_to_msecs(total_backoff)); + goto bail; + } + /* * <chip> After you! * <dale> No, after you! @@ -1193,6 +1327,7 @@ static int dlm_join_domain(struct dlm_ctxt *dlm) */ backoff = (unsigned int)(jiffies & 0x3); backoff *= DLM_DOMAIN_BACKOFF_MS; + total_backoff += backoff; mlog(0, "backoff %d\n", backoff); msleep(backoff); } @@ -1421,21 +1556,21 @@ static int dlm_register_net_handlers(void) status = o2net_register_handler(DLM_QUERY_JOIN_MSG, DLM_MOD_KEY, sizeof(struct dlm_query_join_request), dlm_query_join_handler, - NULL, &dlm_join_handlers); + NULL, NULL, &dlm_join_handlers); if (status) goto bail; status = o2net_register_handler(DLM_ASSERT_JOINED_MSG, DLM_MOD_KEY, sizeof(struct dlm_assert_joined), dlm_assert_joined_handler, - NULL, &dlm_join_handlers); + NULL, NULL, &dlm_join_handlers); if (status) goto bail; status = o2net_register_handler(DLM_CANCEL_JOIN_MSG, DLM_MOD_KEY, sizeof(struct dlm_cancel_join), dlm_cancel_join_handler, - NULL, &dlm_join_handlers); + NULL, NULL, &dlm_join_handlers); bail: if (status < 0) diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c index e5ca3db197f6..52578d907d9a 100644 --- a/fs/ocfs2/dlm/dlmlock.c +++ b/fs/ocfs2/dlm/dlmlock.c @@ -163,6 +163,10 @@ static enum dlm_status dlmlock_master(struct dlm_ctxt *dlm, kick_thread = 1; } } + /* reduce the inflight count, this may result in the lockres + * being purged below during calc_usage */ + if (lock->ml.node == dlm->node_num) + dlm_lockres_drop_inflight_ref(dlm, res); spin_unlock(&res->spinlock); wake_up(&res->wq); @@ -437,7 +441,8 @@ struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie, * held on exit: none * returns: DLM_NORMAL, DLM_SYSERR, DLM_IVLOCKID, DLM_NOTQUEUED */ -int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_create_lock *create = (struct dlm_create_lock *)msg->buf; diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index 0ad872055cb3..77e4e6169a0d 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -99,9 +99,10 @@ static void dlm_mle_node_up(struct dlm_ctxt *dlm, int idx); static void dlm_assert_master_worker(struct dlm_work_item *item, void *data); -static int dlm_do_assert_master(struct dlm_ctxt *dlm, const char *lockname, - unsigned int namelen, void *nodemap, - u32 flags); +static int dlm_do_assert_master(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + void *nodemap, u32 flags); +static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data); static inline int dlm_mle_equal(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle, @@ -237,7 +238,8 @@ static int dlm_find_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry **mle, char *name, unsigned int namelen); -static int dlm_do_master_request(struct dlm_master_list_entry *mle, int to); +static int dlm_do_master_request(struct dlm_lock_resource *res, + struct dlm_master_list_entry *mle, int to); static int dlm_wait_for_lock_mastery(struct dlm_ctxt *dlm, @@ -687,6 +689,7 @@ static void dlm_init_lockres(struct dlm_ctxt *dlm, INIT_LIST_HEAD(&res->purge); atomic_set(&res->asts_reserved, 0); res->migration_pending = 0; + res->inflight_locks = 0; kref_init(&res->refs); @@ -700,6 +703,7 @@ static void dlm_init_lockres(struct dlm_ctxt *dlm, res->last_used = 0; memset(res->lvb, 0, DLM_LVB_LEN); + memset(res->refmap, 0, sizeof(res->refmap)); } struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, @@ -722,6 +726,42 @@ struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm, return res; } +void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + int new_lockres, + const char *file, + int line) +{ + if (!new_lockres) + assert_spin_locked(&res->spinlock); + + if (!test_bit(dlm->node_num, res->refmap)) { + BUG_ON(res->inflight_locks != 0); + dlm_lockres_set_refmap_bit(dlm->node_num, res); + } + res->inflight_locks++; + mlog(0, "%s:%.*s: inflight++: now %u\n", + dlm->name, res->lockname.len, res->lockname.name, + res->inflight_locks); +} + +void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + const char *file, + int line) +{ + assert_spin_locked(&res->spinlock); + + BUG_ON(res->inflight_locks == 0); + res->inflight_locks--; + mlog(0, "%s:%.*s: inflight--: now %u\n", + dlm->name, res->lockname.len, res->lockname.name, + res->inflight_locks); + if (res->inflight_locks == 0) + dlm_lockres_clear_refmap_bit(dlm->node_num, res); + wake_up(&res->wq); +} + /* * lookup a lock resource by name. * may already exist in the hashtable. @@ -752,6 +792,7 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm, unsigned int hash; int tries = 0; int bit, wait_on_recovery = 0; + int drop_inflight_if_nonlocal = 0; BUG_ON(!lockid); @@ -761,9 +802,30 @@ struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm, lookup: spin_lock(&dlm->spinlock); - tmpres = __dlm_lookup_lockres(dlm, lockid, namelen, hash); + tmpres = __dlm_lookup_lockres_full(dlm, lockid, namelen, hash); if (tmpres) { + int dropping_ref = 0; + + spin_lock(&tmpres->spinlock); + if (tmpres->owner == dlm->node_num) { + BUG_ON(tmpres->state & DLM_LOCK_RES_DROPPING_REF); + dlm_lockres_grab_inflight_ref(dlm, tmpres); + } else if (tmpres->state & DLM_LOCK_RES_DROPPING_REF) + dropping_ref = 1; + spin_unlock(&tmpres->spinlock); spin_unlock(&dlm->spinlock); + + /* wait until done messaging the master, drop our ref to allow + * the lockres to be purged, start over. */ + if (dropping_ref) { + spin_lock(&tmpres->spinlock); + __dlm_wait_on_lockres_flags(tmpres, DLM_LOCK_RES_DROPPING_REF); + spin_unlock(&tmpres->spinlock); + dlm_lockres_put(tmpres); + tmpres = NULL; + goto lookup; + } + mlog(0, "found in hash!\n"); if (res) dlm_lockres_put(res); @@ -793,6 +855,7 @@ lookup: spin_lock(&res->spinlock); dlm_change_lockres_owner(dlm, res, dlm->node_num); __dlm_insert_lockres(dlm, res); + dlm_lockres_grab_inflight_ref(dlm, res); spin_unlock(&res->spinlock); spin_unlock(&dlm->spinlock); /* lockres still marked IN_PROGRESS */ @@ -805,29 +868,40 @@ lookup: /* if we found a block, wait for lock to be mastered by another node */ blocked = dlm_find_mle(dlm, &mle, (char *)lockid, namelen); if (blocked) { + int mig; if (mle->type == DLM_MLE_MASTER) { mlog(ML_ERROR, "master entry for nonexistent lock!\n"); BUG(); - } else if (mle->type == DLM_MLE_MIGRATION) { - /* migration is in progress! */ - /* the good news is that we now know the - * "current" master (mle->master). */ - + } + mig = (mle->type == DLM_MLE_MIGRATION); + /* if there is a migration in progress, let the migration + * finish before continuing. we can wait for the absence + * of the MIGRATION mle: either the migrate finished or + * one of the nodes died and the mle was cleaned up. + * if there is a BLOCK here, but it already has a master + * set, we are too late. the master does not have a ref + * for us in the refmap. detach the mle and drop it. + * either way, go back to the top and start over. */ + if (mig || mle->master != O2NM_MAX_NODES) { + BUG_ON(mig && mle->master == dlm->node_num); + /* we arrived too late. the master does not + * have a ref for us. retry. */ + mlog(0, "%s:%.*s: late on %s\n", + dlm->name, namelen, lockid, + mig ? "MIGRATION" : "BLOCK"); spin_unlock(&dlm->master_lock); - assert_spin_locked(&dlm->spinlock); - - /* set the lockres owner and hash it */ - spin_lock(&res->spinlock); - dlm_set_lockres_owner(dlm, res, mle->master); - __dlm_insert_lockres(dlm, res); - spin_unlock(&res->spinlock); spin_unlock(&dlm->spinlock); /* master is known, detach */ - dlm_mle_detach_hb_events(dlm, mle); + if (!mig) + dlm_mle_detach_hb_events(dlm, mle); dlm_put_mle(mle); mle = NULL; - goto wake_waiters; + /* this is lame, but we cant wait on either + * the mle or lockres waitqueue here */ + if (mig) + msleep(100); + goto lookup; } } else { /* go ahead and try to master lock on this node */ @@ -858,6 +932,13 @@ lookup: /* finally add the lockres to its hash bucket */ __dlm_insert_lockres(dlm, res); + /* since this lockres is new it doesnt not require the spinlock */ + dlm_lockres_grab_inflight_ref_new(dlm, res); + + /* if this node does not become the master make sure to drop + * this inflight reference below */ + drop_inflight_if_nonlocal = 1; + /* get an extra ref on the mle in case this is a BLOCK * if so, the creator of the BLOCK may try to put the last * ref at this time in the assert master handler, so we @@ -910,7 +991,7 @@ redo_request: ret = -EINVAL; dlm_node_iter_init(mle->vote_map, &iter); while ((nodenum = dlm_node_iter_next(&iter)) >= 0) { - ret = dlm_do_master_request(mle, nodenum); + ret = dlm_do_master_request(res, mle, nodenum); if (ret < 0) mlog_errno(ret); if (mle->master != O2NM_MAX_NODES) { @@ -960,6 +1041,8 @@ wait: wake_waiters: spin_lock(&res->spinlock); + if (res->owner != dlm->node_num && drop_inflight_if_nonlocal) + dlm_lockres_drop_inflight_ref(dlm, res); res->state &= ~DLM_LOCK_RES_IN_PROGRESS; spin_unlock(&res->spinlock); wake_up(&res->wq); @@ -998,7 +1081,7 @@ recheck: /* this will cause the master to re-assert across * the whole cluster, freeing up mles */ if (res->owner != dlm->node_num) { - ret = dlm_do_master_request(mle, res->owner); + ret = dlm_do_master_request(res, mle, res->owner); if (ret < 0) { /* give recovery a chance to run */ mlog(ML_ERROR, "link to %u went down?: %d\n", res->owner, ret); @@ -1062,6 +1145,8 @@ recheck: * now tell other nodes that I am * mastering this. */ mle->master = dlm->node_num; + /* ref was grabbed in get_lock_resource + * will be dropped in dlmlock_master */ assert = 1; sleep = 0; } @@ -1087,7 +1172,8 @@ recheck: (atomic_read(&mle->woken) == 1), timeo); if (res->owner == O2NM_MAX_NODES) { - mlog(0, "waiting again\n"); + mlog(0, "%s:%.*s: waiting again\n", dlm->name, + res->lockname.len, res->lockname.name); goto recheck; } mlog(0, "done waiting, master is %u\n", res->owner); @@ -1100,8 +1186,7 @@ recheck: m = dlm->node_num; mlog(0, "about to master %.*s here, this=%u\n", res->lockname.len, res->lockname.name, m); - ret = dlm_do_assert_master(dlm, res->lockname.name, - res->lockname.len, mle->vote_map, 0); + ret = dlm_do_assert_master(dlm, res, mle->vote_map, 0); if (ret) { /* This is a failure in the network path, * not in the response to the assert_master @@ -1117,6 +1202,8 @@ recheck: /* set the lockres owner */ spin_lock(&res->spinlock); + /* mastery reference obtained either during + * assert_master_handler or in get_lock_resource */ dlm_change_lockres_owner(dlm, res, m); spin_unlock(&res->spinlock); @@ -1283,7 +1370,8 @@ static int dlm_restart_lock_mastery(struct dlm_ctxt *dlm, * */ -static int dlm_do_master_request(struct dlm_master_list_entry *mle, int to) +static int dlm_do_master_request(struct dlm_lock_resource *res, + struct dlm_master_list_entry *mle, int to) { struct dlm_ctxt *dlm = mle->dlm; struct dlm_master_request request; @@ -1339,6 +1427,9 @@ again: case DLM_MASTER_RESP_YES: set_bit(to, mle->response_map); mlog(0, "node %u is the master, response=YES\n", to); + mlog(0, "%s:%.*s: master node %u now knows I have a " + "reference\n", dlm->name, res->lockname.len, + res->lockname.name, to); mle->master = to; break; case DLM_MASTER_RESP_NO: @@ -1379,7 +1470,8 @@ out: * * if possible, TRIM THIS DOWN!!! */ -int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { u8 response = DLM_MASTER_RESP_MAYBE; struct dlm_ctxt *dlm = data; @@ -1417,10 +1509,11 @@ way_up_top: /* take care of the easy cases up front */ spin_lock(&res->spinlock); - if (res->state & DLM_LOCK_RES_RECOVERING) { + if (res->state & (DLM_LOCK_RES_RECOVERING| + DLM_LOCK_RES_MIGRATING)) { spin_unlock(&res->spinlock); mlog(0, "returning DLM_MASTER_RESP_ERROR since res is " - "being recovered\n"); + "being recovered/migrated\n"); response = DLM_MASTER_RESP_ERROR; if (mle) kmem_cache_free(dlm_mle_cache, mle); @@ -1428,8 +1521,10 @@ way_up_top: } if (res->owner == dlm->node_num) { + mlog(0, "%s:%.*s: setting bit %u in refmap\n", + dlm->name, namelen, name, request->node_idx); + dlm_lockres_set_refmap_bit(request->node_idx, res); spin_unlock(&res->spinlock); - // mlog(0, "this node is the master\n"); response = DLM_MASTER_RESP_YES; if (mle) kmem_cache_free(dlm_mle_cache, mle); @@ -1477,7 +1572,6 @@ way_up_top: mlog(0, "node %u is master, but trying to migrate to " "node %u.\n", tmpmle->master, tmpmle->new_master); if (tmpmle->master == dlm->node_num) { - response = DLM_MASTER_RESP_YES; mlog(ML_ERROR, "no owner on lockres, but this " "node is trying to migrate it to %u?!\n", tmpmle->new_master); @@ -1494,6 +1588,10 @@ way_up_top: * go back and clean the mles on any * other nodes */ dispatch_assert = 1; + dlm_lockres_set_refmap_bit(request->node_idx, res); + mlog(0, "%s:%.*s: setting bit %u in refmap\n", + dlm->name, namelen, name, + request->node_idx); } else response = DLM_MASTER_RESP_NO; } else { @@ -1607,17 +1705,24 @@ send_response: * can periodically run all locks owned by this node * and re-assert across the cluster... */ -static int dlm_do_assert_master(struct dlm_ctxt *dlm, const char *lockname, - unsigned int namelen, void *nodemap, - u32 flags) +int dlm_do_assert_master(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + void *nodemap, u32 flags) { struct dlm_assert_master assert; int to, tmpret; struct dlm_node_iter iter; int ret = 0; int reassert; + const char *lockname = res->lockname.name; + unsigned int namelen = res->lockname.len; BUG_ON(namelen > O2NM_MAX_NAME_LEN); + + spin_lock(&res->spinlock); + res->state |= DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + again: reassert = 0; @@ -1647,6 +1752,7 @@ again: mlog(0, "link to %d went down!\n", to); /* any nonzero status return will do */ ret = tmpret; + r = 0; } else if (r < 0) { /* ok, something horribly messed. kill thyself. */ mlog(ML_ERROR,"during assert master of %.*s to %u, " @@ -1661,17 +1767,39 @@ again: spin_unlock(&dlm->master_lock); spin_unlock(&dlm->spinlock); BUG(); - } else if (r == EAGAIN) { + } + + if (r & DLM_ASSERT_RESPONSE_REASSERT && + !(r & DLM_ASSERT_RESPONSE_MASTERY_REF)) { + mlog(ML_ERROR, "%.*s: very strange, " + "master MLE but no lockres on %u\n", + namelen, lockname, to); + } + + if (r & DLM_ASSERT_RESPONSE_REASSERT) { mlog(0, "%.*s: node %u create mles on other " "nodes and requests a re-assert\n", namelen, lockname, to); reassert = 1; } + if (r & DLM_ASSERT_RESPONSE_MASTERY_REF) { + mlog(0, "%.*s: node %u has a reference to this " + "lockres, set the bit in the refmap\n", + namelen, lockname, to); + spin_lock(&res->spinlock); + dlm_lockres_set_refmap_bit(to, res); + spin_unlock(&res->spinlock); + } } if (reassert) goto again; + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + wake_up(&res->wq); + return ret; } @@ -1684,7 +1812,8 @@ again: * * if possible, TRIM THIS DOWN!!! */ -int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_master_list_entry *mle = NULL; @@ -1693,7 +1822,7 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data) char *name; unsigned int namelen, hash; u32 flags; - int master_request = 0; + int master_request = 0, have_lockres_ref = 0; int ret = 0; if (!dlm_grab(dlm)) @@ -1851,6 +1980,7 @@ ok: spin_unlock(&mle->spinlock); if (res) { + int wake = 0; spin_lock(&res->spinlock); if (mle->type == DLM_MLE_MIGRATION) { mlog(0, "finishing off migration of lockres %.*s, " @@ -1858,12 +1988,16 @@ ok: res->lockname.len, res->lockname.name, dlm->node_num, mle->new_master); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; dlm_change_lockres_owner(dlm, res, mle->new_master); BUG_ON(res->state & DLM_LOCK_RES_DIRTY); } else { dlm_change_lockres_owner(dlm, res, mle->master); } spin_unlock(&res->spinlock); + have_lockres_ref = 1; + if (wake) + wake_up(&res->wq); } /* master is known, detach if not already detached. @@ -1913,12 +2047,28 @@ ok: done: ret = 0; - if (res) - dlm_lockres_put(res); + if (res) { + spin_lock(&res->spinlock); + res->state |= DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + *ret_data = (void *)res; + } dlm_put(dlm); if (master_request) { mlog(0, "need to tell master to reassert\n"); - ret = EAGAIN; // positive. negative would shoot down the node. + /* positive. negative would shoot down the node. */ + ret |= DLM_ASSERT_RESPONSE_REASSERT; + if (!have_lockres_ref) { + mlog(ML_ERROR, "strange, got assert from %u, MASTER " + "mle present here for %s:%.*s, but no lockres!\n", + assert->node_idx, dlm->name, namelen, name); + } + } + if (have_lockres_ref) { + /* let the master know we have a reference to the lockres */ + ret |= DLM_ASSERT_RESPONSE_MASTERY_REF; + mlog(0, "%s:%.*s: got assert from %u, need a ref\n", + dlm->name, namelen, name, assert->node_idx); } return ret; @@ -1929,11 +2079,25 @@ kill: __dlm_print_one_lock_resource(res); spin_unlock(&res->spinlock); spin_unlock(&dlm->spinlock); - dlm_lockres_put(res); + *ret_data = (void *)res; dlm_put(dlm); return -EINVAL; } +void dlm_assert_master_post_handler(int status, void *data, void *ret_data) +{ + struct dlm_lock_resource *res = (struct dlm_lock_resource *)ret_data; + + if (ret_data) { + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + wake_up(&res->wq); + dlm_lockres_put(res); + } + return; +} + int dlm_dispatch_assert_master(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, int ignore_higher, u8 request_from, u32 flags) @@ -2023,9 +2187,7 @@ static void dlm_assert_master_worker(struct dlm_work_item *item, void *data) * even if one or more nodes die */ mlog(0, "worker about to master %.*s here, this=%u\n", res->lockname.len, res->lockname.name, dlm->node_num); - ret = dlm_do_assert_master(dlm, res->lockname.name, - res->lockname.len, - nodemap, flags); + ret = dlm_do_assert_master(dlm, res, nodemap, flags); if (ret < 0) { /* no need to restart, we are done */ if (!dlm_is_host_down(ret)) @@ -2097,14 +2259,180 @@ static int dlm_pre_master_reco_lockres(struct dlm_ctxt *dlm, return ret; } +/* + * DLM_DEREF_LOCKRES_MSG + */ + +int dlm_drop_lockres_ref(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) +{ + struct dlm_deref_lockres deref; + int ret = 0, r; + const char *lockname; + unsigned int namelen; + + lockname = res->lockname.name; + namelen = res->lockname.len; + BUG_ON(namelen > O2NM_MAX_NAME_LEN); + + mlog(0, "%s:%.*s: sending deref to %d\n", + dlm->name, namelen, lockname, res->owner); + memset(&deref, 0, sizeof(deref)); + deref.node_idx = dlm->node_num; + deref.namelen = namelen; + memcpy(deref.name, lockname, namelen); + + ret = o2net_send_message(DLM_DEREF_LOCKRES_MSG, dlm->key, + &deref, sizeof(deref), res->owner, &r); + if (ret < 0) + mlog_errno(ret); + else if (r < 0) { + /* BAD. other node says I did not have a ref. */ + mlog(ML_ERROR,"while dropping ref on %s:%.*s " + "(master=%u) got %d.\n", dlm->name, namelen, + lockname, res->owner, r); + dlm_print_one_lock_resource(res); + BUG(); + } + return ret; +} + +int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) +{ + struct dlm_ctxt *dlm = data; + struct dlm_deref_lockres *deref = (struct dlm_deref_lockres *)msg->buf; + struct dlm_lock_resource *res = NULL; + char *name; + unsigned int namelen; + int ret = -EINVAL; + u8 node; + unsigned int hash; + struct dlm_work_item *item; + int cleared = 0; + int dispatch = 0; + + if (!dlm_grab(dlm)) + return 0; + + name = deref->name; + namelen = deref->namelen; + node = deref->node_idx; + + if (namelen > DLM_LOCKID_NAME_MAX) { + mlog(ML_ERROR, "Invalid name length!"); + goto done; + } + if (deref->node_idx >= O2NM_MAX_NODES) { + mlog(ML_ERROR, "Invalid node number: %u\n", node); + goto done; + } + + hash = dlm_lockid_hash(name, namelen); + + spin_lock(&dlm->spinlock); + res = __dlm_lookup_lockres_full(dlm, name, namelen, hash); + if (!res) { + spin_unlock(&dlm->spinlock); + mlog(ML_ERROR, "%s:%.*s: bad lockres name\n", + dlm->name, namelen, name); + goto done; + } + spin_unlock(&dlm->spinlock); + + spin_lock(&res->spinlock); + if (res->state & DLM_LOCK_RES_SETREF_INPROG) + dispatch = 1; + else { + BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF); + if (test_bit(node, res->refmap)) { + dlm_lockres_clear_refmap_bit(node, res); + cleared = 1; + } + } + spin_unlock(&res->spinlock); + + if (!dispatch) { + if (cleared) + dlm_lockres_calc_usage(dlm, res); + else { + mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref " + "but it is already dropped!\n", dlm->name, + res->lockname.len, res->lockname.name, node); + __dlm_print_one_lock_resource(res); + } + ret = 0; + goto done; + } + + item = kzalloc(sizeof(*item), GFP_NOFS); + if (!item) { + ret = -ENOMEM; + mlog_errno(ret); + goto done; + } + + dlm_init_work_item(dlm, item, dlm_deref_lockres_worker, NULL); + item->u.dl.deref_res = res; + item->u.dl.deref_node = node; + + spin_lock(&dlm->work_lock); + list_add_tail(&item->list, &dlm->work_list); + spin_unlock(&dlm->work_lock); + + queue_work(dlm->dlm_worker, &dlm->dispatched_work); + return 0; + +done: + if (res) + dlm_lockres_put(res); + dlm_put(dlm); + + return ret; +} + +static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data) +{ + struct dlm_ctxt *dlm; + struct dlm_lock_resource *res; + u8 node; + u8 cleared = 0; + + dlm = item->dlm; + res = item->u.dl.deref_res; + node = item->u.dl.deref_node; + + spin_lock(&res->spinlock); + BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF); + if (test_bit(node, res->refmap)) { + __dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG); + dlm_lockres_clear_refmap_bit(node, res); + cleared = 1; + } + spin_unlock(&res->spinlock); + + if (cleared) { + mlog(0, "%s:%.*s node %u ref dropped in dispatch\n", + dlm->name, res->lockname.len, res->lockname.name, node); + dlm_lockres_calc_usage(dlm, res); + } else { + mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref " + "but it is already dropped!\n", dlm->name, + res->lockname.len, res->lockname.name, node); + __dlm_print_one_lock_resource(res); + } + + dlm_lockres_put(res); +} + /* * DLM_MIGRATE_LOCKRES */ -int dlm_migrate_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, - u8 target) +static int dlm_migrate_lockres(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res, + u8 target) { struct dlm_master_list_entry *mle = NULL; struct dlm_master_list_entry *oldmle = NULL; @@ -2116,7 +2444,7 @@ int dlm_migrate_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, struct list_head *queue, *iter; int i; struct dlm_lock *lock; - int empty = 1; + int empty = 1, wake = 0; if (!dlm_grab(dlm)) return -EINVAL; @@ -2241,6 +2569,7 @@ int dlm_migrate_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, res->lockname.name, target); spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; spin_unlock(&res->spinlock); ret = -EINVAL; } @@ -2268,6 +2597,9 @@ fail: * the lockres */ + /* now that remote nodes are spinning on the MIGRATING flag, + * ensure that all assert_master work is flushed. */ + flush_workqueue(dlm->dlm_worker); /* get an extra reference on the mle. * otherwise the assert_master from the new @@ -2296,6 +2628,7 @@ fail: dlm_put_mle_inuse(mle); spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; spin_unlock(&res->spinlock); goto leave; } @@ -2322,7 +2655,8 @@ fail: res->owner == target) break; - mlog(0, "timed out during migration\n"); + mlog(0, "%s:%.*s: timed out during migration\n", + dlm->name, res->lockname.len, res->lockname.name); /* avoid hang during shutdown when migrating lockres * to a node which also goes down */ if (dlm_is_node_dead(dlm, target)) { @@ -2330,20 +2664,20 @@ fail: "target %u is no longer up, restarting\n", dlm->name, res->lockname.len, res->lockname.name, target); - ret = -ERESTARTSYS; + ret = -EINVAL; + /* migration failed, detach and clean up mle */ + dlm_mle_detach_hb_events(dlm, mle); + dlm_put_mle(mle); + dlm_put_mle_inuse(mle); + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; + spin_unlock(&res->spinlock); + goto leave; } - } - if (ret == -ERESTARTSYS) { - /* migration failed, detach and clean up mle */ - dlm_mle_detach_hb_events(dlm, mle); - dlm_put_mle(mle); - dlm_put_mle_inuse(mle); - spin_lock(&res->spinlock); - res->state &= ~DLM_LOCK_RES_MIGRATING; - spin_unlock(&res->spinlock); - goto leave; - } - /* TODO: if node died: stop, clean up, return error */ + } else + mlog(0, "%s:%.*s: caught signal during migration\n", + dlm->name, res->lockname.len, res->lockname.name); } /* all done, set the owner, clear the flag */ @@ -2366,6 +2700,11 @@ leave: if (ret < 0) dlm_kick_thread(dlm, res); + /* wake up waiters if the MIGRATING flag got set + * but migration failed */ + if (wake) + wake_up(&res->wq); + /* TODO: cleanup */ if (mres) free_page((unsigned long)mres); @@ -2376,6 +2715,53 @@ leave: return ret; } +#define DLM_MIGRATION_RETRY_MS 100 + +/* Should be called only after beginning the domain leave process. + * There should not be any remaining locks on nonlocal lock resources, + * and there should be no local locks left on locally mastered resources. + * + * Called with the dlm spinlock held, may drop it to do migration, but + * will re-acquire before exit. + * + * Returns: 1 if dlm->spinlock was dropped/retaken, 0 if never dropped */ +int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) +{ + int ret; + int lock_dropped = 0; + + if (res->owner != dlm->node_num) { + if (!__dlm_lockres_unused(res)) { + mlog(ML_ERROR, "%s:%.*s: this node is not master, " + "trying to free this but locks remain\n", + dlm->name, res->lockname.len, res->lockname.name); + } + goto leave; + } + + /* Wheee! Migrate lockres here! Will sleep so drop spinlock. */ + spin_unlock(&dlm->spinlock); + lock_dropped = 1; + while (1) { + ret = dlm_migrate_lockres(dlm, res, O2NM_MAX_NODES); + if (ret >= 0) + break; + if (ret == -ENOTEMPTY) { + mlog(ML_ERROR, "lockres %.*s still has local locks!\n", + res->lockname.len, res->lockname.name); + BUG(); + } + + mlog(0, "lockres %.*s: migrate failed, " + "retrying\n", res->lockname.len, + res->lockname.name); + msleep(DLM_MIGRATION_RETRY_MS); + } + spin_lock(&dlm->spinlock); +leave: + return lock_dropped; +} + int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock) { int ret; @@ -2405,7 +2791,8 @@ static int dlm_migration_can_proceed(struct dlm_ctxt *dlm, return can_proceed; } -int dlm_lockres_is_dirty(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) +static int dlm_lockres_is_dirty(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res) { int ret; spin_lock(&res->spinlock); @@ -2434,8 +2821,15 @@ static int dlm_mark_lockres_migrating(struct dlm_ctxt *dlm, __dlm_lockres_reserve_ast(res); spin_unlock(&res->spinlock); - /* now flush all the pending asts.. hang out for a bit */ + /* now flush all the pending asts */ dlm_kick_thread(dlm, res); + /* before waiting on DIRTY, block processes which may + * try to dirty the lockres before MIGRATING is set */ + spin_lock(&res->spinlock); + BUG_ON(res->state & DLM_LOCK_RES_BLOCK_DIRTY); + res->state |= DLM_LOCK_RES_BLOCK_DIRTY; + spin_unlock(&res->spinlock); + /* now wait on any pending asts and the DIRTY state */ wait_event(dlm->ast_wq, !dlm_lockres_is_dirty(dlm, res)); dlm_lockres_release_ast(dlm, res); @@ -2461,6 +2855,13 @@ again: mlog(0, "trying again...\n"); goto again; } + /* now that we are sure the MIGRATING state is there, drop + * the unneded state which blocked threads trying to DIRTY */ + spin_lock(&res->spinlock); + BUG_ON(!(res->state & DLM_LOCK_RES_BLOCK_DIRTY)); + BUG_ON(!(res->state & DLM_LOCK_RES_MIGRATING)); + res->state &= ~DLM_LOCK_RES_BLOCK_DIRTY; + spin_unlock(&res->spinlock); /* did the target go down or die? */ spin_lock(&dlm->spinlock); @@ -2490,7 +2891,7 @@ static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm, { struct list_head *iter, *iter2; struct list_head *queue = &res->granted; - int i; + int i, bit; struct dlm_lock *lock; assert_spin_locked(&res->spinlock); @@ -2508,12 +2909,28 @@ static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm, BUG_ON(!list_empty(&lock->bast_list)); BUG_ON(lock->ast_pending); BUG_ON(lock->bast_pending); + dlm_lockres_clear_refmap_bit(lock->ml.node, res); list_del_init(&lock->list); dlm_lock_put(lock); } } queue++; } + bit = 0; + while (1) { + bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit); + if (bit >= O2NM_MAX_NODES) + break; + /* do not clear the local node reference, if there is a + * process holding this, let it drop the ref itself */ + if (bit != dlm->node_num) { + mlog(0, "%s:%.*s: node %u had a ref to this " + "migrating lockres, clearing\n", dlm->name, + res->lockname.len, res->lockname.name, bit); + dlm_lockres_clear_refmap_bit(bit, res); + } + bit++; + } } /* for now this is not too intelligent. we will @@ -2601,6 +3018,16 @@ static int dlm_do_migrate_request(struct dlm_ctxt *dlm, mlog(0, "migrate request (node %u) returned %d!\n", nodenum, status); ret = status; + } else if (status == DLM_MIGRATE_RESPONSE_MASTERY_REF) { + /* during the migration request we short-circuited + * the mastery of the lockres. make sure we have + * a mastery ref for nodenum */ + mlog(0, "%s:%.*s: need ref for node %u\n", + dlm->name, res->lockname.len, res->lockname.name, + nodenum); + spin_lock(&res->spinlock); + dlm_lockres_set_refmap_bit(nodenum, res); + spin_unlock(&res->spinlock); } } @@ -2619,7 +3046,8 @@ static int dlm_do_migrate_request(struct dlm_ctxt *dlm, * we will have no mle in the list to start with. now we can add an mle for * the migration and this should be the only one found for those scanning the * list. */ -int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_lock_resource *res = NULL; @@ -2745,7 +3173,13 @@ static int dlm_add_migration_mle(struct dlm_ctxt *dlm, /* remove it from the list so that only one * mle will be found */ list_del_init(&tmp->list); - __dlm_mle_detach_hb_events(dlm, mle); + /* this was obviously WRONG. mle is uninited here. should be tmp. */ + __dlm_mle_detach_hb_events(dlm, tmp); + ret = DLM_MIGRATE_RESPONSE_MASTERY_REF; + mlog(0, "%s:%.*s: master=%u, newmaster=%u, " + "telling master to get ref for cleared out mle " + "during migration\n", dlm->name, namelen, name, + master, new_master); } spin_unlock(&tmp->spinlock); } @@ -2753,6 +3187,8 @@ static int dlm_add_migration_mle(struct dlm_ctxt *dlm, /* now add a migration mle to the tail of the list */ dlm_init_mle(mle, DLM_MLE_MIGRATION, dlm, res, name, namelen); mle->new_master = new_master; + /* the new master will be sending an assert master for this. + * at that point we will get the refmap reference */ mle->master = master; /* do this for consistency with other mle types */ set_bit(new_master, mle->maybe_map); @@ -2902,6 +3338,13 @@ int dlm_finish_migration(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, clear_bit(dlm->node_num, iter.node_map); spin_unlock(&dlm->spinlock); + /* ownership of the lockres is changing. account for the + * mastery reference here since old_master will briefly have + * a reference after the migration completes */ + spin_lock(&res->spinlock); + dlm_lockres_set_refmap_bit(old_master, res); + spin_unlock(&res->spinlock); + mlog(0, "now time to do a migrate request to other nodes\n"); ret = dlm_do_migrate_request(dlm, res, old_master, dlm->node_num, &iter); @@ -2914,8 +3357,7 @@ int dlm_finish_migration(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, res->lockname.len, res->lockname.name); /* this call now finishes out the nodemap * even if one or more nodes die */ - ret = dlm_do_assert_master(dlm, res->lockname.name, - res->lockname.len, iter.node_map, + ret = dlm_do_assert_master(dlm, res, iter.node_map, DLM_ASSERT_MASTER_FINISH_MIGRATION); if (ret < 0) { /* no longer need to retry. all living nodes contacted. */ @@ -2927,8 +3369,7 @@ int dlm_finish_migration(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, set_bit(old_master, iter.node_map); mlog(0, "doing assert master of %.*s back to %u\n", res->lockname.len, res->lockname.name, old_master); - ret = dlm_do_assert_master(dlm, res->lockname.name, - res->lockname.len, iter.node_map, + ret = dlm_do_assert_master(dlm, res, iter.node_map, DLM_ASSERT_MASTER_FINISH_MIGRATION); if (ret < 0) { mlog(0, "assert master to original master failed " diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c index 367a11e9e2ed..6d4a83d50152 100644 --- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/fs/ocfs2/dlm/dlmrecovery.c @@ -163,9 +163,6 @@ void dlm_dispatch_work(struct work_struct *work) dlm_workfunc_t *workfunc; int tot=0; - if (!dlm_joined(dlm)) - return; - spin_lock(&dlm->work_lock); list_splice_init(&dlm->work_list, &tmp_list); spin_unlock(&dlm->work_lock); @@ -821,7 +818,8 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from, } -int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_lock_request *lr = (struct dlm_lock_request *)msg->buf; @@ -978,7 +976,8 @@ static int dlm_send_all_done_msg(struct dlm_ctxt *dlm, u8 dead_node, u8 send_to) } -int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_reco_data_done *done = (struct dlm_reco_data_done *)msg->buf; @@ -1129,6 +1128,11 @@ static int dlm_send_mig_lockres_msg(struct dlm_ctxt *dlm, if (total_locks == mres_total_locks) mres->flags |= DLM_MRES_ALL_DONE; + mlog(0, "%s:%.*s: sending mig lockres (%s) to %u\n", + dlm->name, res->lockname.len, res->lockname.name, + orig_flags & DLM_MRES_MIGRATION ? "migrate" : "recovery", + send_to); + /* send it */ ret = o2net_send_message(DLM_MIG_LOCKRES_MSG, dlm->key, mres, sz, send_to, &status); @@ -1213,6 +1217,34 @@ static int dlm_add_lock_to_array(struct dlm_lock *lock, return 0; } +static void dlm_add_dummy_lock(struct dlm_ctxt *dlm, + struct dlm_migratable_lockres *mres) +{ + struct dlm_lock dummy; + memset(&dummy, 0, sizeof(dummy)); + dummy.ml.cookie = 0; + dummy.ml.type = LKM_IVMODE; + dummy.ml.convert_type = LKM_IVMODE; + dummy.ml.highest_blocked = LKM_IVMODE; + dummy.lksb = NULL; + dummy.ml.node = dlm->node_num; + dlm_add_lock_to_array(&dummy, mres, DLM_BLOCKED_LIST); +} + +static inline int dlm_is_dummy_lock(struct dlm_ctxt *dlm, + struct dlm_migratable_lock *ml, + u8 *nodenum) +{ + if (unlikely(ml->cookie == 0 && + ml->type == LKM_IVMODE && + ml->convert_type == LKM_IVMODE && + ml->highest_blocked == LKM_IVMODE && + ml->list == DLM_BLOCKED_LIST)) { + *nodenum = ml->node; + return 1; + } + return 0; +} int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, struct dlm_migratable_lockres *mres, @@ -1260,6 +1292,14 @@ int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, goto error; } } + if (total_locks == 0) { + /* send a dummy lock to indicate a mastery reference only */ + mlog(0, "%s:%.*s: sending dummy lock to %u, %s\n", + dlm->name, res->lockname.len, res->lockname.name, + send_to, flags & DLM_MRES_RECOVERY ? "recovery" : + "migration"); + dlm_add_dummy_lock(dlm, mres); + } /* flush any remaining locks */ ret = dlm_send_mig_lockres_msg(dlm, mres, send_to, res, total_locks); if (ret < 0) @@ -1293,7 +1333,8 @@ error: * do we spin? returning an error only delays the problem really */ -int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_migratable_lockres *mres = @@ -1382,17 +1423,21 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data) spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_IN_PROGRESS; spin_unlock(&res->spinlock); + wake_up(&res->wq); /* add an extra ref for just-allocated lockres * otherwise the lockres will be purged immediately */ dlm_lockres_get(res); - } /* at this point we have allocated everything we need, * and we have a hashed lockres with an extra ref and * the proper res->state flags. */ ret = 0; + spin_lock(&res->spinlock); + /* drop this either when master requery finds a different master + * or when a lock is added by the recovery worker */ + dlm_lockres_grab_inflight_ref(dlm, res); if (mres->master == DLM_LOCK_RES_OWNER_UNKNOWN) { /* migration cannot have an unknown master */ BUG_ON(!(mres->flags & DLM_MRES_RECOVERY)); @@ -1400,10 +1445,11 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data) "unknown owner.. will need to requery: " "%.*s\n", mres->lockname_len, mres->lockname); } else { - spin_lock(&res->spinlock); + /* take a reference now to pin the lockres, drop it + * when locks are added in the worker */ dlm_change_lockres_owner(dlm, res, dlm->node_num); - spin_unlock(&res->spinlock); } + spin_unlock(&res->spinlock); /* queue up work for dlm_mig_lockres_worker */ dlm_grab(dlm); /* get an extra ref for the work item */ @@ -1459,6 +1505,9 @@ again: "this node will take it.\n", res->lockname.len, res->lockname.name); } else { + spin_lock(&res->spinlock); + dlm_lockres_drop_inflight_ref(dlm, res); + spin_unlock(&res->spinlock); mlog(0, "master needs to respond to sender " "that node %u still owns %.*s\n", real_master, res->lockname.len, @@ -1578,7 +1627,8 @@ int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, /* this function cannot error, so unless the sending * or receiving of the message failed, the owner can * be trusted */ -int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_master_requery *req = (struct dlm_master_requery *)msg->buf; @@ -1660,21 +1710,38 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm, { struct dlm_migratable_lock *ml; struct list_head *queue; + struct list_head *tmpq = NULL; struct dlm_lock *newlock = NULL; struct dlm_lockstatus *lksb = NULL; int ret = 0; - int i, bad; + int i, j, bad; struct list_head *iter; struct dlm_lock *lock = NULL; + u8 from = O2NM_MAX_NODES; + unsigned int added = 0; mlog(0, "running %d locks for this lockres\n", mres->num_locks); for (i=0; i<mres->num_locks; i++) { ml = &(mres->ml[i]); + + if (dlm_is_dummy_lock(dlm, ml, &from)) { + /* placeholder, just need to set the refmap bit */ + BUG_ON(mres->num_locks != 1); + mlog(0, "%s:%.*s: dummy lock for %u\n", + dlm->name, mres->lockname_len, mres->lockname, + from); + spin_lock(&res->spinlock); + dlm_lockres_set_refmap_bit(from, res); + spin_unlock(&res->spinlock); + added++; + break; + } BUG_ON(ml->highest_blocked != LKM_IVMODE); newlock = NULL; lksb = NULL; queue = dlm_list_num_to_pointer(res, ml->list); + tmpq = NULL; /* if the lock is for the local node it needs to * be moved to the proper location within the queue. @@ -1684,11 +1751,16 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm, BUG_ON(!(mres->flags & DLM_MRES_MIGRATION)); spin_lock(&res->spinlock); - list_for_each(iter, queue) { - lock = list_entry (iter, struct dlm_lock, list); - if (lock->ml.cookie != ml->cookie) - lock = NULL; - else + for (j = DLM_GRANTED_LIST; j <= DLM_BLOCKED_LIST; j++) { + tmpq = dlm_list_idx_to_ptr(res, j); + list_for_each(iter, tmpq) { + lock = list_entry (iter, struct dlm_lock, list); + if (lock->ml.cookie != ml->cookie) + lock = NULL; + else + break; + } + if (lock) break; } @@ -1698,12 +1770,20 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm, u64 c = ml->cookie; mlog(ML_ERROR, "could not find local lock " "with cookie %u:%llu!\n", - dlm_get_lock_cookie_node(c), - dlm_get_lock_cookie_seq(c)); + dlm_get_lock_cookie_node(be64_to_cpu(c)), + dlm_get_lock_cookie_seq(be64_to_cpu(c))); + __dlm_print_one_lock_resource(res); BUG(); } BUG_ON(lock->ml.node != ml->node); + if (tmpq != queue) { + mlog(0, "lock was on %u instead of %u for %.*s\n", + j, ml->list, res->lockname.len, res->lockname.name); + spin_unlock(&res->spinlock); + continue; + } + /* see NOTE above about why we do not update * to match the master here */ @@ -1711,6 +1791,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm, /* do not alter lock refcount. switching lists. */ list_move_tail(&lock->list, queue); spin_unlock(&res->spinlock); + added++; mlog(0, "just reordered a local lock!\n"); continue; @@ -1799,14 +1880,14 @@ skip_lvb: mlog(ML_ERROR, "%s:%.*s: %u:%llu: lock already " "exists on this lockres!\n", dlm->name, res->lockname.len, res->lockname.name, - dlm_get_lock_cookie_node(c), - dlm_get_lock_cookie_seq(c)); + dlm_get_lock_cookie_node(be64_to_cpu(c)), + dlm_get_lock_cookie_seq(be64_to_cpu(c))); mlog(ML_NOTICE, "sent lock: type=%d, conv=%d, " "node=%u, cookie=%u:%llu, queue=%d\n", ml->type, ml->convert_type, ml->node, - dlm_get_lock_cookie_node(ml->cookie), - dlm_get_lock_cookie_seq(ml->cookie), + dlm_get_lock_cookie_node(be64_to_cpu(ml->cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(ml->cookie)), ml->list); __dlm_print_one_lock_resource(res); @@ -1817,12 +1898,22 @@ skip_lvb: if (!bad) { dlm_lock_get(newlock); list_add_tail(&newlock->list, queue); + mlog(0, "%s:%.*s: added lock for node %u, " + "setting refmap bit\n", dlm->name, + res->lockname.len, res->lockname.name, ml->node); + dlm_lockres_set_refmap_bit(ml->node, res); + added++; } spin_unlock(&res->spinlock); } mlog(0, "done running all the locks\n"); leave: + /* balance the ref taken when the work was queued */ + spin_lock(&res->spinlock); + dlm_lockres_drop_inflight_ref(dlm, res); + spin_unlock(&res->spinlock); + if (ret < 0) { mlog_errno(ret); if (newlock) @@ -1935,9 +2026,11 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm, if (res->owner == dead_node) { list_del_init(&res->recovering); spin_lock(&res->spinlock); + /* new_master has our reference from + * the lock state sent during recovery */ dlm_change_lockres_owner(dlm, res, new_master); res->state &= ~DLM_LOCK_RES_RECOVERING; - if (!__dlm_lockres_unused(res)) + if (__dlm_lockres_has_locks(res)) __dlm_dirty_lockres(dlm, res); spin_unlock(&res->spinlock); wake_up(&res->wq); @@ -1977,9 +2070,11 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm, dlm_lockres_put(res); } spin_lock(&res->spinlock); + /* new_master has our reference from + * the lock state sent during recovery */ dlm_change_lockres_owner(dlm, res, new_master); res->state &= ~DLM_LOCK_RES_RECOVERING; - if (!__dlm_lockres_unused(res)) + if (__dlm_lockres_has_locks(res)) __dlm_dirty_lockres(dlm, res); spin_unlock(&res->spinlock); wake_up(&res->wq); @@ -2048,6 +2143,7 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm, { struct list_head *iter, *tmpiter; struct dlm_lock *lock; + unsigned int freed = 0; /* this node is the lockres master: * 1) remove any stale locks for the dead node @@ -2062,6 +2158,7 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm, if (lock->ml.node == dead_node) { list_del_init(&lock->list); dlm_lock_put(lock); + freed++; } } list_for_each_safe(iter, tmpiter, &res->converting) { @@ -2069,6 +2166,7 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm, if (lock->ml.node == dead_node) { list_del_init(&lock->list); dlm_lock_put(lock); + freed++; } } list_for_each_safe(iter, tmpiter, &res->blocked) { @@ -2076,9 +2174,23 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm, if (lock->ml.node == dead_node) { list_del_init(&lock->list); dlm_lock_put(lock); + freed++; } } + if (freed) { + mlog(0, "%s:%.*s: freed %u locks for dead node %u, " + "dropping ref from lockres\n", dlm->name, + res->lockname.len, res->lockname.name, freed, dead_node); + BUG_ON(!test_bit(dead_node, res->refmap)); + dlm_lockres_clear_refmap_bit(dead_node, res); + } else if (test_bit(dead_node, res->refmap)) { + mlog(0, "%s:%.*s: dead node %u had a ref, but had " + "no locks and had not purged before dying\n", dlm->name, + res->lockname.len, res->lockname.name, dead_node); + dlm_lockres_clear_refmap_bit(dead_node, res); + } + /* do not kick thread yet */ __dlm_dirty_lockres(dlm, res); } @@ -2141,9 +2253,21 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node) spin_lock(&res->spinlock); /* zero the lvb if necessary */ dlm_revalidate_lvb(dlm, res, dead_node); - if (res->owner == dead_node) + if (res->owner == dead_node) { + if (res->state & DLM_LOCK_RES_DROPPING_REF) + mlog(0, "%s:%.*s: owned by " + "dead node %u, this node was " + "dropping its ref when it died. " + "continue, dropping the flag.\n", + dlm->name, res->lockname.len, + res->lockname.name, dead_node); + + /* the wake_up for this will happen when the + * RECOVERING flag is dropped later */ + res->state &= ~DLM_LOCK_RES_DROPPING_REF; + dlm_move_lockres_to_recovery_list(dlm, res); - else if (res->owner == dlm->node_num) { + } else if (res->owner == dlm->node_num) { dlm_free_dead_locks(dlm, res, dead_node); __dlm_lockres_calc_usage(dlm, res); } @@ -2480,7 +2604,8 @@ retry: return ret; } -int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_begin_reco *br = (struct dlm_begin_reco *)msg->buf; @@ -2608,7 +2733,8 @@ stage2: return ret; } -int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_finalize_reco *fr = (struct dlm_finalize_reco *)msg->buf; diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c index 0c822f3ffb05..8ffa0916eb86 100644 --- a/fs/ocfs2/dlm/dlmthread.c +++ b/fs/ocfs2/dlm/dlmthread.c @@ -54,9 +54,6 @@ #include "cluster/masklog.h" static int dlm_thread(void *data); -static void dlm_purge_lockres_now(struct dlm_ctxt *dlm, - struct dlm_lock_resource *lockres); - static void dlm_flush_asts(struct dlm_ctxt *dlm); #define dlm_lock_is_remote(dlm, lock) ((lock)->ml.node != (dlm)->node_num) @@ -82,14 +79,33 @@ repeat: current->state = TASK_RUNNING; } - -int __dlm_lockres_unused(struct dlm_lock_resource *res) +int __dlm_lockres_has_locks(struct dlm_lock_resource *res) { if (list_empty(&res->granted) && list_empty(&res->converting) && - list_empty(&res->blocked) && - list_empty(&res->dirty)) - return 1; + list_empty(&res->blocked)) + return 0; + return 1; +} + +/* "unused": the lockres has no locks, is not on the dirty list, + * has no inflight locks (in the gap between mastery and acquiring + * the first lock), and has no bits in its refmap. + * truly ready to be freed. */ +int __dlm_lockres_unused(struct dlm_lock_resource *res) +{ + if (!__dlm_lockres_has_locks(res) && + (list_empty(&res->dirty) && !(res->state & DLM_LOCK_RES_DIRTY))) { + /* try not to scan the bitmap unless the first two + * conditions are already true */ + int bit = find_next_bit(res->refmap, O2NM_MAX_NODES, 0); + if (bit >= O2NM_MAX_NODES) { + /* since the bit for dlm->node_num is not + * set, inflight_locks better be zero */ + BUG_ON(res->inflight_locks != 0); + return 1; + } + } return 0; } @@ -106,46 +122,21 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, assert_spin_locked(&res->spinlock); if (__dlm_lockres_unused(res)){ - /* For now, just keep any resource we master */ - if (res->owner == dlm->node_num) - { - if (!list_empty(&res->purge)) { - mlog(0, "we master %s:%.*s, but it is on " - "the purge list. Removing\n", - dlm->name, res->lockname.len, - res->lockname.name); - list_del_init(&res->purge); - dlm->purge_count--; - } - return; - } - if (list_empty(&res->purge)) { - mlog(0, "putting lockres %.*s from purge list\n", - res->lockname.len, res->lockname.name); + mlog(0, "putting lockres %.*s:%p onto purge list\n", + res->lockname.len, res->lockname.name, res); res->last_used = jiffies; + dlm_lockres_get(res); list_add_tail(&res->purge, &dlm->purge_list); dlm->purge_count++; - - /* if this node is not the owner, there is - * no way to keep track of who the owner could be. - * unhash it to avoid serious problems. */ - if (res->owner != dlm->node_num) { - mlog(0, "%s:%.*s: doing immediate " - "purge of lockres owned by %u\n", - dlm->name, res->lockname.len, - res->lockname.name, res->owner); - - dlm_purge_lockres_now(dlm, res); - } } } else if (!list_empty(&res->purge)) { - mlog(0, "removing lockres %.*s from purge list, " - "owner=%u\n", res->lockname.len, res->lockname.name, - res->owner); + mlog(0, "removing lockres %.*s:%p from purge list, owner=%u\n", + res->lockname.len, res->lockname.name, res, res->owner); list_del_init(&res->purge); + dlm_lockres_put(res); dlm->purge_count--; } } @@ -163,68 +154,65 @@ void dlm_lockres_calc_usage(struct dlm_ctxt *dlm, spin_unlock(&dlm->spinlock); } -/* TODO: Eventual API: Called with the dlm spinlock held, may drop it - * to do migration, but will re-acquire before exit. */ -void dlm_purge_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *lockres) +static int dlm_purge_lockres(struct dlm_ctxt *dlm, + struct dlm_lock_resource *res) { int master; - int ret; - - spin_lock(&lockres->spinlock); - master = lockres->owner == dlm->node_num; - spin_unlock(&lockres->spinlock); + int ret = 0; - mlog(0, "purging lockres %.*s, master = %d\n", lockres->lockname.len, - lockres->lockname.name, master); - - /* Non master is the easy case -- no migration required, just - * quit. */ + spin_lock(&res->spinlock); + if (!__dlm_lockres_unused(res)) { + spin_unlock(&res->spinlock); + mlog(0, "%s:%.*s: tried to purge but not unused\n", + dlm->name, res->lockname.len, res->lockname.name); + return -ENOTEMPTY; + } + master = (res->owner == dlm->node_num); if (!master) - goto finish; - - /* Wheee! Migrate lockres here! */ - spin_unlock(&dlm->spinlock); -again: + res->state |= DLM_LOCK_RES_DROPPING_REF; + spin_unlock(&res->spinlock); - ret = dlm_migrate_lockres(dlm, lockres, O2NM_MAX_NODES); - if (ret == -ENOTEMPTY) { - mlog(ML_ERROR, "lockres %.*s still has local locks!\n", - lockres->lockname.len, lockres->lockname.name); + mlog(0, "purging lockres %.*s, master = %d\n", res->lockname.len, + res->lockname.name, master); - BUG(); - } else if (ret < 0) { - mlog(ML_NOTICE, "lockres %.*s: migrate failed, retrying\n", - lockres->lockname.len, lockres->lockname.name); - msleep(100); - goto again; + if (!master) { + spin_lock(&res->spinlock); + /* This ensures that clear refmap is sent after the set */ + __dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG); + spin_unlock(&res->spinlock); + /* drop spinlock to do messaging, retake below */ + spin_unlock(&dlm->spinlock); + /* clear our bit from the master's refmap, ignore errors */ + ret = dlm_drop_lockres_ref(dlm, res); + if (ret < 0) { + mlog_errno(ret); + if (!dlm_is_host_down(ret)) + BUG(); + } + mlog(0, "%s:%.*s: dlm_deref_lockres returned %d\n", + dlm->name, res->lockname.len, res->lockname.name, ret); + spin_lock(&dlm->spinlock); } - spin_lock(&dlm->spinlock); - -finish: - if (!list_empty(&lockres->purge)) { - list_del_init(&lockres->purge); + if (!list_empty(&res->purge)) { + mlog(0, "removing lockres %.*s:%p from purgelist, " + "master = %d\n", res->lockname.len, res->lockname.name, + res, master); + list_del_init(&res->purge); + dlm_lockres_put(res); dlm->purge_count--; } - __dlm_unhash_lockres(lockres); -} - -/* make an unused lockres go away immediately. - * as soon as the dlm spinlock is dropped, this lockres - * will not be found. kfree still happens on last put. */ -static void dlm_purge_lockres_now(struct dlm_ctxt *dlm, - struct dlm_lock_resource *lockres) -{ - assert_spin_locked(&dlm->spinlock); - assert_spin_locked(&lockres->spinlock); + __dlm_unhash_lockres(res); - BUG_ON(!__dlm_lockres_unused(lockres)); - - if (!list_empty(&lockres->purge)) { - list_del_init(&lockres->purge); - dlm->purge_count--; + /* lockres is not in the hash now. drop the flag and wake up + * any processes waiting in dlm_get_lock_resource. */ + if (!master) { + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_DROPPING_REF; + spin_unlock(&res->spinlock); + wake_up(&res->wq); } - __dlm_unhash_lockres(lockres); + return 0; } static void dlm_run_purge_list(struct dlm_ctxt *dlm, @@ -268,13 +256,17 @@ static void dlm_run_purge_list(struct dlm_ctxt *dlm, break; } + mlog(0, "removing lockres %.*s:%p from purgelist\n", + lockres->lockname.len, lockres->lockname.name, lockres); list_del_init(&lockres->purge); + dlm_lockres_put(lockres); dlm->purge_count--; /* This may drop and reacquire the dlm spinlock if it * has to do migration. */ mlog(0, "calling dlm_purge_lockres!\n"); - dlm_purge_lockres(dlm, lockres); + if (dlm_purge_lockres(dlm, lockres)) + BUG(); mlog(0, "DONE calling dlm_purge_lockres!\n"); /* Avoid adding any scheduling latencies */ @@ -467,12 +459,17 @@ void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) assert_spin_locked(&res->spinlock); /* don't shuffle secondary queues */ - if ((res->owner == dlm->node_num) && - !(res->state & DLM_LOCK_RES_DIRTY)) { - /* ref for dirty_list */ - dlm_lockres_get(res); - list_add_tail(&res->dirty, &dlm->dirty_list); - res->state |= DLM_LOCK_RES_DIRTY; + if ((res->owner == dlm->node_num)) { + if (res->state & (DLM_LOCK_RES_MIGRATING | + DLM_LOCK_RES_BLOCK_DIRTY)) + return; + + if (list_empty(&res->dirty)) { + /* ref for dirty_list */ + dlm_lockres_get(res); + list_add_tail(&res->dirty, &dlm->dirty_list); + res->state |= DLM_LOCK_RES_DIRTY; + } } } @@ -651,7 +648,7 @@ static int dlm_thread(void *data) dlm_lockres_get(res); spin_lock(&res->spinlock); - res->state &= ~DLM_LOCK_RES_DIRTY; + /* We clear the DLM_LOCK_RES_DIRTY state once we shuffle lists below */ list_del_init(&res->dirty); spin_unlock(&res->spinlock); spin_unlock(&dlm->spinlock); @@ -675,10 +672,11 @@ static int dlm_thread(void *data) /* it is now ok to move lockreses in these states * to the dirty list, assuming that they will only be * dirty for a short while. */ + BUG_ON(res->state & DLM_LOCK_RES_MIGRATING); if (res->state & (DLM_LOCK_RES_IN_PROGRESS | - DLM_LOCK_RES_MIGRATING | DLM_LOCK_RES_RECOVERING)) { /* move it to the tail and keep going */ + res->state &= ~DLM_LOCK_RES_DIRTY; spin_unlock(&res->spinlock); mlog(0, "delaying list shuffling for in-" "progress lockres %.*s, state=%d\n", @@ -699,6 +697,7 @@ static int dlm_thread(void *data) /* called while holding lockres lock */ dlm_shuffle_lists(dlm, res); + res->state &= ~DLM_LOCK_RES_DIRTY; spin_unlock(&res->spinlock); dlm_lockres_calc_usage(dlm, res); @@ -709,11 +708,8 @@ in_progress: /* if the lock was in-progress, stick * it on the back of the list */ if (delay) { - /* ref for dirty_list */ - dlm_lockres_get(res); spin_lock(&res->spinlock); - list_add_tail(&res->dirty, &dlm->dirty_list); - res->state |= DLM_LOCK_RES_DIRTY; + __dlm_dirty_lockres(dlm, res); spin_unlock(&res->spinlock); } dlm_lockres_put(res); diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c index 37be4b2e0d4a..86ca085ef324 100644 --- a/fs/ocfs2/dlm/dlmunlock.c +++ b/fs/ocfs2/dlm/dlmunlock.c @@ -147,6 +147,10 @@ static enum dlm_status dlmunlock_common(struct dlm_ctxt *dlm, goto leave; } + if (res->state & DLM_LOCK_RES_MIGRATING) { + status = DLM_MIGRATING; + goto leave; + } /* see above for what the spec says about * LKM_CANCEL and the lock queue state */ @@ -244,8 +248,8 @@ leave: /* this should always be coupled with list removal */ BUG_ON(!(actions & DLM_UNLOCK_REMOVE_LOCK)); mlog(0, "lock %u:%llu should be gone now! refs=%d\n", - dlm_get_lock_cookie_node(lock->ml.cookie), - dlm_get_lock_cookie_seq(lock->ml.cookie), + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), atomic_read(&lock->lock_refs.refcount)-1); dlm_lock_put(lock); } @@ -379,7 +383,8 @@ static enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm, * returns: DLM_NORMAL, DLM_BADARGS, DLM_IVLOCKID, * return value from dlmunlock_master */ -int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data) +int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data, + void **ret_data) { struct dlm_ctxt *dlm = data; struct dlm_unlock_lock *unlock = (struct dlm_unlock_lock *)msg->buf; @@ -502,8 +507,8 @@ not_found: if (!found) mlog(ML_ERROR, "failed to find lock to unlock! " "cookie=%u:%llu\n", - dlm_get_lock_cookie_node(unlock->cookie), - dlm_get_lock_cookie_seq(unlock->cookie)); + dlm_get_lock_cookie_node(be64_to_cpu(unlock->cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(unlock->cookie))); else dlm_lock_put(lock); diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h index e1216364d191..d026b4f27757 100644 --- a/fs/ocfs2/journal.h +++ b/fs/ocfs2/journal.h @@ -306,8 +306,8 @@ int ocfs2_journal_dirty_data(handle_t *handle, * for the dinode, one for the new block. */ #define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2) -/* file update (nlink, etc) + dir entry block */ -#define OCFS2_LINK_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) +/* file update (nlink, etc) + directory mtime/ctime + dir entry block */ +#define OCFS2_LINK_CREDITS (2*OCFS2_INODE_UPDATE_CREDITS + 1) /* inode + dir inode (if we unlink a dir), + dir entry block + orphan * dir inode link */ diff --git a/fs/ocfs2/vote.c b/fs/ocfs2/vote.c index 0afd8b9af70f..f30e63b9910c 100644 --- a/fs/ocfs2/vote.c +++ b/fs/ocfs2/vote.c @@ -887,7 +887,7 @@ static inline int ocfs2_translate_response(int response) static int ocfs2_handle_response_message(struct o2net_msg *msg, u32 len, - void *data) + void *data, void **ret_data) { unsigned int response_id, node_num; int response_status; @@ -943,7 +943,7 @@ bail: static int ocfs2_handle_vote_message(struct o2net_msg *msg, u32 len, - void *data) + void *data, void **ret_data) { int status; struct ocfs2_super *osb = data; @@ -1007,7 +1007,7 @@ int ocfs2_register_net_handlers(struct ocfs2_super *osb) osb->net_key, sizeof(struct ocfs2_response_msg), ocfs2_handle_response_message, - osb, &osb->osb_net_handlers); + osb, NULL, &osb->osb_net_handlers); if (status) { mlog_errno(status); goto bail; @@ -1017,7 +1017,7 @@ int ocfs2_register_net_handlers(struct ocfs2_super *osb) osb->net_key, sizeof(struct ocfs2_vote_msg), ocfs2_handle_vote_message, - osb, &osb->osb_net_handlers); + osb, NULL, &osb->osb_net_handlers); if (status) { mlog_errno(status); goto bail; diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c index e8f540d38d48..d3b9f5f07db1 100644 --- a/fs/sysfs/bin.c +++ b/fs/sysfs/bin.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <asm/uaccess.h> +#include <asm/semaphore.h> #include "sysfs.h" @@ -146,7 +147,7 @@ static int open(struct inode * inode, struct file * file) Error: module_put(attr->attr.owner); Done: - if (error && kobj) + if (error) kobject_put(kobj); return error; } @@ -157,8 +158,7 @@ static int release(struct inode * inode, struct file * file) struct bin_attribute * attr = to_bin_attr(file->f_path.dentry); u8 * buffer = file->private_data; - if (kobj) - kobject_put(kobj); + kobject_put(kobj); module_put(attr->attr.owner); kfree(buffer); return 0; diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 511edef8b321..9dcdf556c99c 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -9,6 +9,7 @@ #include <linux/module.h> #include <linux/kobject.h> #include <linux/namei.h> +#include <asm/semaphore.h> #include "sysfs.h" DECLARE_RWSEM(sysfs_rename_sem); @@ -32,8 +33,7 @@ static struct dentry_operations sysfs_dentry_ops = { /* * Allocates a new sysfs_dirent and links it to the parent sysfs_dirent */ -static struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent * parent_sd, - void * element) +static struct sysfs_dirent * __sysfs_new_dirent(void * element) { struct sysfs_dirent * sd; @@ -45,12 +45,28 @@ static struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent * parent_sd, atomic_set(&sd->s_count, 1); atomic_set(&sd->s_event, 1); INIT_LIST_HEAD(&sd->s_children); - list_add(&sd->s_sibling, &parent_sd->s_children); + INIT_LIST_HEAD(&sd->s_sibling); sd->s_element = element; return sd; } +static void __sysfs_list_dirent(struct sysfs_dirent *parent_sd, + struct sysfs_dirent *sd) +{ + if (sd) + list_add(&sd->s_sibling, &parent_sd->s_children); +} + +static struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent *parent_sd, + void * element) +{ + struct sysfs_dirent *sd; + sd = __sysfs_new_dirent(element); + __sysfs_list_dirent(parent_sd, sd); + return sd; +} + /* * * Return -EEXIST if there is already a sysfs element with the same name for @@ -77,14 +93,14 @@ int sysfs_dirent_exist(struct sysfs_dirent *parent_sd, } -int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry, - void * element, umode_t mode, int type) +static struct sysfs_dirent * +__sysfs_make_dirent(struct dentry *dentry, void *element, mode_t mode, int type) { struct sysfs_dirent * sd; - sd = sysfs_new_dirent(parent_sd, element); + sd = __sysfs_new_dirent(element); if (!sd) - return -ENOMEM; + goto out; sd->s_mode = mode; sd->s_type = type; @@ -94,7 +110,19 @@ int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry, dentry->d_op = &sysfs_dentry_ops; } - return 0; +out: + return sd; +} + +int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry, + void * element, umode_t mode, int type) +{ + struct sysfs_dirent *sd; + + sd = __sysfs_make_dirent(dentry, element, mode, type); + __sysfs_list_dirent(parent_sd, sd); + + return sd ? 0 : -ENOMEM; } static int init_dir(struct inode * inode) @@ -165,11 +193,11 @@ int sysfs_create_subdir(struct kobject * k, const char * n, struct dentry ** d) /** * sysfs_create_dir - create a directory for an object. - * @parent: parent parent object. * @kobj: object we're creating directory for. + * @shadow_parent: parent parent object. */ -int sysfs_create_dir(struct kobject * kobj) +int sysfs_create_dir(struct kobject * kobj, struct dentry *shadow_parent) { struct dentry * dentry = NULL; struct dentry * parent; @@ -177,7 +205,9 @@ int sysfs_create_dir(struct kobject * kobj) BUG_ON(!kobj); - if (kobj->parent) + if (shadow_parent) + parent = shadow_parent; + else if (kobj->parent) parent = kobj->parent->dentry; else if (sysfs_mount && sysfs_mount->mnt_sb) parent = sysfs_mount->mnt_sb->s_root; @@ -298,21 +328,12 @@ void sysfs_remove_subdir(struct dentry * d) } -/** - * sysfs_remove_dir - remove an object's directory. - * @kobj: object. - * - * The only thing special about this is that we remove any files in - * the directory before we remove the directory, and we've inlined - * what used to be sysfs_rmdir() below, instead of calling separately. - */ - -void sysfs_remove_dir(struct kobject * kobj) +static void __sysfs_remove_dir(struct dentry *dentry) { - struct dentry * dentry = dget(kobj->dentry); struct sysfs_dirent * parent_sd; struct sysfs_dirent * sd, * tmp; + dget(dentry); if (!dentry) return; @@ -333,32 +354,60 @@ void sysfs_remove_dir(struct kobject * kobj) * Drop reference from dget() on entrance. */ dput(dentry); +} + +/** + * sysfs_remove_dir - remove an object's directory. + * @kobj: object. + * + * The only thing special about this is that we remove any files in + * the directory before we remove the directory, and we've inlined + * what used to be sysfs_rmdir() below, instead of calling separately. + */ + +void sysfs_remove_dir(struct kobject * kobj) +{ + __sysfs_remove_dir(kobj->dentry); kobj->dentry = NULL; } -int sysfs_rename_dir(struct kobject * kobj, const char *new_name) +int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent, + const char *new_name) { int error = 0; - struct dentry * new_dentry, * parent; - - if (!strcmp(kobject_name(kobj), new_name)) - return -EINVAL; + struct dentry * new_dentry; - if (!kobj->parent) - return -EINVAL; + if (!new_parent) + return -EFAULT; down_write(&sysfs_rename_sem); - parent = kobj->parent->dentry; - - mutex_lock(&parent->d_inode->i_mutex); + mutex_lock(&new_parent->d_inode->i_mutex); - new_dentry = lookup_one_len(new_name, parent, strlen(new_name)); + new_dentry = lookup_one_len(new_name, new_parent, strlen(new_name)); if (!IS_ERR(new_dentry)) { - if (!new_dentry->d_inode) { + /* By allowing two different directories with the + * same d_parent we allow this routine to move + * between different shadows of the same directory + */ + if (kobj->dentry->d_parent->d_inode != new_parent->d_inode) + return -EINVAL; + else if (new_dentry->d_parent->d_inode != new_parent->d_inode) + error = -EINVAL; + else if (new_dentry == kobj->dentry) + error = -EINVAL; + else if (!new_dentry->d_inode) { error = kobject_set_name(kobj, "%s", new_name); if (!error) { + struct sysfs_dirent *sd, *parent_sd; + d_add(new_dentry, NULL); d_move(kobj->dentry, new_dentry); + + sd = kobj->dentry->d_fsdata; + parent_sd = new_parent->d_fsdata; + + list_del_init(&sd->s_sibling); + list_add(&sd->s_sibling, &parent_sd->s_children); } else d_drop(new_dentry); @@ -366,7 +415,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char *new_name) error = -EEXIST; dput(new_dentry); } - mutex_unlock(&parent->d_inode->i_mutex); + mutex_unlock(&new_parent->d_inode->i_mutex); up_write(&sysfs_rename_sem); return error; @@ -378,12 +427,10 @@ int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent) struct sysfs_dirent *new_parent_sd, *sd; int error; - if (!new_parent) - return -EINVAL; - old_parent_dentry = kobj->parent ? kobj->parent->dentry : sysfs_mount->mnt_sb->s_root; - new_parent_dentry = new_parent->dentry; + new_parent_dentry = new_parent ? + new_parent->dentry : sysfs_mount->mnt_sb->s_root; again: mutex_lock(&old_parent_dentry->d_inode->i_mutex); @@ -547,6 +594,95 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin) return offset; } + +/** + * sysfs_make_shadowed_dir - Setup so a directory can be shadowed + * @kobj: object we're creating shadow of. + */ + +int sysfs_make_shadowed_dir(struct kobject *kobj, + void * (*follow_link)(struct dentry *, struct nameidata *)) +{ + struct inode *inode; + struct inode_operations *i_op; + + inode = kobj->dentry->d_inode; + if (inode->i_op != &sysfs_dir_inode_operations) + return -EINVAL; + + i_op = kmalloc(sizeof(*i_op), GFP_KERNEL); + if (!i_op) + return -ENOMEM; + + memcpy(i_op, &sysfs_dir_inode_operations, sizeof(*i_op)); + i_op->follow_link = follow_link; + + /* Locking of inode->i_op? + * Since setting i_op is a single word write and they + * are atomic we should be ok here. + */ + inode->i_op = i_op; + return 0; +} + +/** + * sysfs_create_shadow_dir - create a shadow directory for an object. + * @kobj: object we're creating directory for. + * + * sysfs_make_shadowed_dir must already have been called on this + * directory. + */ + +struct dentry *sysfs_create_shadow_dir(struct kobject *kobj) +{ + struct sysfs_dirent *sd; + struct dentry *parent, *dir, *shadow; + struct inode *inode; + + dir = kobj->dentry; + inode = dir->d_inode; + parent = dir->d_parent; + shadow = ERR_PTR(-EINVAL); + if (!sysfs_is_shadowed_inode(inode)) + goto out; + + shadow = d_alloc(parent, &dir->d_name); + if (!shadow) + goto nomem; + + sd = __sysfs_make_dirent(shadow, kobj, inode->i_mode, SYSFS_DIR); + if (!sd) + goto nomem; + + d_instantiate(shadow, igrab(inode)); + inc_nlink(inode); + inc_nlink(parent->d_inode); + shadow->d_op = &sysfs_dentry_ops; + + dget(shadow); /* Extra count - pin the dentry in core */ + +out: + return shadow; +nomem: + dput(shadow); + shadow = ERR_PTR(-ENOMEM); + goto out; +} + +/** + * sysfs_remove_shadow_dir - remove an object's directory. + * @shadow: dentry of shadow directory + * + * The only thing special about this is that we remove any files in + * the directory before we remove the directory, and we've inlined + * what used to be sysfs_rmdir() below, instead of calling separately. + */ + +void sysfs_remove_shadow_dir(struct dentry *shadow) +{ + __sysfs_remove_dir(shadow); +} + const struct file_operations sysfs_dir_operations = { .open = sysfs_dir_open, .release = sysfs_dir_close, diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 9cfe53e1e00d..c0e117649a4d 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -7,6 +7,7 @@ #include <linux/kobject.h> #include <linux/namei.h> #include <linux/poll.h> +#include <linux/list.h> #include <asm/uaccess.h> #include <asm/semaphore.h> @@ -50,17 +51,29 @@ static struct sysfs_ops subsys_sysfs_ops = { .store = subsys_attr_store, }; +/** + * add_to_collection - add buffer to a collection + * @buffer: buffer to be added + * @node inode of set to add to + */ -struct sysfs_buffer { - size_t count; - loff_t pos; - char * page; - struct sysfs_ops * ops; - struct semaphore sem; - int needs_read_fill; - int event; -}; +static inline void +add_to_collection(struct sysfs_buffer *buffer, struct inode *node) +{ + struct sysfs_buffer_collection *set = node->i_private; + mutex_lock(&node->i_mutex); + list_add(&buffer->associates, &set->associates); + mutex_unlock(&node->i_mutex); +} + +static inline void +remove_from_collection(struct sysfs_buffer *buffer, struct inode *node) +{ + mutex_lock(&node->i_mutex); + list_del(&buffer->associates); + mutex_unlock(&node->i_mutex); +} /** * fill_read_buffer - allocate and fill buffer from object. @@ -70,7 +83,8 @@ struct sysfs_buffer { * Allocate @buffer->page, if it hasn't been already, then call the * kobject's show() method to fill the buffer with this attribute's * data. - * This is called only once, on the file's first read. + * This is called only once, on the file's first read unless an error + * is returned. */ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer) { @@ -88,12 +102,13 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer buffer->event = atomic_read(&sd->s_event); count = ops->show(kobj,attr,buffer->page); - buffer->needs_read_fill = 0; BUG_ON(count > (ssize_t)PAGE_SIZE); - if (count >= 0) + if (count >= 0) { + buffer->needs_read_fill = 0; buffer->count = count; - else + } else { ret = count; + } return ret; } @@ -153,6 +168,10 @@ sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos) ssize_t retval = 0; down(&buffer->sem); + if (buffer->orphaned) { + retval = -ENODEV; + goto out; + } if (buffer->needs_read_fill) { if ((retval = fill_read_buffer(file->f_path.dentry,buffer))) goto out; @@ -165,7 +184,6 @@ out: return retval; } - /** * fill_write_buffer - copy buffer from userspace. * @buffer: data buffer for file. @@ -243,19 +261,25 @@ sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t ssize_t len; down(&buffer->sem); + if (buffer->orphaned) { + len = -ENODEV; + goto out; + } len = fill_write_buffer(buffer, buf, count); if (len > 0) len = flush_write_buffer(file->f_path.dentry, buffer, len); if (len > 0) *ppos += len; +out: up(&buffer->sem); return len; } -static int check_perm(struct inode * inode, struct file * file) +static int sysfs_open_file(struct inode *inode, struct file *file) { struct kobject *kobj = sysfs_get_kobject(file->f_path.dentry->d_parent); struct attribute * attr = to_attr(file->f_path.dentry); + struct sysfs_buffer_collection *set; struct sysfs_buffer * buffer; struct sysfs_ops * ops = NULL; int error = 0; @@ -285,6 +309,18 @@ static int check_perm(struct inode * inode, struct file * file) if (!ops) goto Eaccess; + /* make sure we have a collection to add our buffers to */ + mutex_lock(&inode->i_mutex); + if (!(set = inode->i_private)) { + if (!(set = inode->i_private = kmalloc(sizeof(struct sysfs_buffer_collection), GFP_KERNEL))) { + error = -ENOMEM; + goto Done; + } else { + INIT_LIST_HEAD(&set->associates); + } + } + mutex_unlock(&inode->i_mutex); + /* File needs write support. * The inode's perms must say it's ok, * and we must have a store method. @@ -310,9 +346,11 @@ static int check_perm(struct inode * inode, struct file * file) */ buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL); if (buffer) { + INIT_LIST_HEAD(&buffer->associates); init_MUTEX(&buffer->sem); buffer->needs_read_fill = 1; buffer->ops = ops; + add_to_collection(buffer, inode); file->private_data = buffer; } else error = -ENOMEM; @@ -325,16 +363,11 @@ static int check_perm(struct inode * inode, struct file * file) error = -EACCES; module_put(attr->owner); Done: - if (error && kobj) + if (error) kobject_put(kobj); return error; } -static int sysfs_open_file(struct inode * inode, struct file * filp) -{ - return check_perm(inode,filp); -} - static int sysfs_release(struct inode * inode, struct file * filp) { struct kobject * kobj = to_kobj(filp->f_path.dentry->d_parent); @@ -342,8 +375,9 @@ static int sysfs_release(struct inode * inode, struct file * filp) struct module * owner = attr->owner; struct sysfs_buffer * buffer = filp->private_data; - if (kobj) - kobject_put(kobj); + if (buffer) + remove_from_collection(buffer, inode); + kobject_put(kobj); /* After this point, attr should not be accessed. */ module_put(owner); @@ -548,7 +582,7 @@ EXPORT_SYMBOL_GPL(sysfs_chmod_file); void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr) { - sysfs_hash_and_remove(kobj->dentry,attr->name); + sysfs_hash_and_remove(kobj->dentry, attr->name); } diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index 122145b0895c..b20951c93761 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -13,6 +13,8 @@ #include <linux/dcache.h> #include <linux/namei.h> #include <linux/err.h> +#include <linux/fs.h> +#include <asm/semaphore.h> #include "sysfs.h" diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index e79e38d52c00..542d2bcc73df 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -13,6 +13,7 @@ #include <linux/backing-dev.h> #include <linux/capability.h> #include <linux/errno.h> +#include <asm/semaphore.h> #include "sysfs.h" extern struct super_block * sysfs_sb; @@ -32,6 +33,16 @@ static struct inode_operations sysfs_inode_operations ={ .setattr = sysfs_setattr, }; +void sysfs_delete_inode(struct inode *inode) +{ + /* Free the shadowed directory inode operations */ + if (sysfs_is_shadowed_inode(inode)) { + kfree(inode->i_op); + inode->i_op = NULL; + } + return generic_delete_inode(inode); +} + int sysfs_setattr(struct dentry * dentry, struct iattr * iattr) { struct inode * inode = dentry->d_inode; @@ -209,6 +220,22 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd) return NULL; } +static inline void orphan_all_buffers(struct inode *node) +{ + struct sysfs_buffer_collection *set = node->i_private; + struct sysfs_buffer *buf; + + mutex_lock_nested(&node->i_mutex, I_MUTEX_CHILD); + if (node->i_private) { + list_for_each_entry(buf, &set->associates, associates) { + down(&buf->sem); + buf->orphaned = 1; + up(&buf->sem); + } + } + mutex_unlock(&node->i_mutex); +} + /* * Unhashes the dentry corresponding to given sysfs_dirent @@ -217,16 +244,23 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd) void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent) { struct dentry * dentry = sd->s_dentry; + struct inode *inode; if (dentry) { spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); if (!(d_unhashed(dentry) && dentry->d_inode)) { + inode = dentry->d_inode; + spin_lock(&inode->i_lock); + __iget(inode); + spin_unlock(&inode->i_lock); dget_locked(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); spin_unlock(&dcache_lock); simple_unlink(parent->d_inode, dentry); + orphan_all_buffers(inode); + iput(inode); } else { spin_unlock(&dentry->d_lock); spin_unlock(&dcache_lock); @@ -248,7 +282,7 @@ int sysfs_hash_and_remove(struct dentry * dir, const char * name) return -ENOENT; parent_sd = dir->d_fsdata; - mutex_lock(&dir->d_inode->i_mutex); + mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT); list_for_each_entry(sd, &parent_sd->s_children, s_sibling) { if (!sd->s_element) continue; diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c index e503f858fba8..f6a87a824883 100644 --- a/fs/sysfs/mount.c +++ b/fs/sysfs/mount.c @@ -8,6 +8,7 @@ #include <linux/mount.h> #include <linux/pagemap.h> #include <linux/init.h> +#include <asm/semaphore.h> #include "sysfs.h" @@ -18,9 +19,12 @@ struct vfsmount *sysfs_mount; struct super_block * sysfs_sb = NULL; struct kmem_cache *sysfs_dir_cachep; +static void sysfs_clear_inode(struct inode *inode); + static struct super_operations sysfs_ops = { .statfs = simple_statfs, - .drop_inode = generic_delete_inode, + .drop_inode = sysfs_delete_inode, + .clear_inode = sysfs_clear_inode, }; static struct sysfs_dirent sysfs_root = { @@ -31,6 +35,11 @@ static struct sysfs_dirent sysfs_root = { .s_iattr = NULL, }; +static void sysfs_clear_inode(struct inode *inode) +{ + kfree(inode->i_private); +} + static int sysfs_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index f50e3cc2ded8..4869f611192f 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -7,6 +7,7 @@ #include <linux/module.h> #include <linux/kobject.h> #include <linux/namei.h> +#include <asm/semaphore.h> #include "sysfs.h" diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index bd7cec295dab..fe1cbfd208ed 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -2,6 +2,7 @@ extern struct vfsmount * sysfs_mount; extern struct kmem_cache *sysfs_dir_cachep; +extern void sysfs_delete_inode(struct inode *inode); extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *); extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *)); @@ -33,6 +34,22 @@ struct sysfs_symlink { struct kobject * target_kobj; }; +struct sysfs_buffer { + struct list_head associates; + size_t count; + loff_t pos; + char * page; + struct sysfs_ops * ops; + struct semaphore sem; + int orphaned; + int needs_read_fill; + int event; +}; + +struct sysfs_buffer_collection { + struct list_head associates; +}; + static inline struct kobject * to_kobj(struct dentry * dentry) { struct sysfs_dirent * sd = dentry->d_fsdata; @@ -96,3 +113,7 @@ static inline void sysfs_put(struct sysfs_dirent * sd) release_sysfs_dirent(sd); } +static inline int sysfs_is_shadowed_inode(struct inode *inode) +{ + return S_ISDIR(inode->i_mode) && inode->i_op->follow_link; +} |
