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-rw-r--r--fs/cifs/connect.c310
1 files changed, 162 insertions, 148 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5c670b998ffb..7635b5db26a7 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -186,6 +186,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_user, "user=%s" },
{ Opt_user, "username=%s" },
{ Opt_blank_pass, "pass=" },
+ { Opt_blank_pass, "password=" },
{ Opt_pass, "pass=%s" },
{ Opt_pass, "password=%s" },
{ Opt_blank_ip, "ip=" },
@@ -274,6 +275,7 @@ static const match_table_t cifs_cacheflavor_tokens = {
static const match_table_t cifs_smb_version_tokens = {
{ Smb_1, SMB1_VERSION_STRING },
+ { Smb_20, SMB20_VERSION_STRING},
{ Smb_21, SMB21_VERSION_STRING },
{ Smb_30, SMB30_VERSION_STRING },
};
@@ -1074,12 +1076,16 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
vol->vals = &smb1_values;
break;
#ifdef CONFIG_CIFS_SMB2
+ case Smb_20:
+ vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->vals = &smb20_values;
+ break;
case Smb_21:
vol->ops = &smb21_operations;
vol->vals = &smb21_values;
break;
case Smb_30:
- vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->ops = &smb30_operations;
vol->vals = &smb30_values;
break;
#endif
@@ -1090,6 +1096,52 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
return 0;
}
+/*
+ * Parse a devname into substrings and populate the vol->UNC and vol->prepath
+ * fields with the result. Returns 0 on success and an error otherwise.
+ */
+static int
+cifs_parse_devname(const char *devname, struct smb_vol *vol)
+{
+ char *pos;
+ const char *delims = "/\\";
+ size_t len;
+
+ /* make sure we have a valid UNC double delimiter prefix */
+ len = strspn(devname, delims);
+ if (len != 2)
+ return -EINVAL;
+
+ /* find delimiter between host and sharename */
+ pos = strpbrk(devname + 2, delims);
+ if (!pos)
+ return -EINVAL;
+
+ /* skip past delimiter */
+ ++pos;
+
+ /* now go until next delimiter or end of string */
+ len = strcspn(pos, delims);
+
+ /* move "pos" up to delimiter or NULL */
+ pos += len;
+ vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
+ if (!vol->UNC)
+ return -ENOMEM;
+
+ convert_delimiter(vol->UNC, '\\');
+
+ /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
+ if (!*pos++ || !*pos)
+ return 0;
+
+ vol->prepath = kstrdup(pos, GFP_KERNEL);
+ if (!vol->prepath)
+ return -ENOMEM;
+
+ return 0;
+}
+
static int
cifs_parse_mount_options(const char *mountdata, const char *devname,
struct smb_vol *vol)
@@ -1108,11 +1160,17 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
char *string = NULL;
char *tmp_end, *value;
char delim;
+ bool got_ip = false;
+ unsigned short port = 0;
+ struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
separator[0] = ',';
separator[1] = 0;
delim = separator[0];
+ /* ensure we always start with zeroed-out smb_vol */
+ memset(vol, 0, sizeof(*vol));
+
/*
* does not have to be perfect mapping since field is
* informational, only used for servers that do not support
@@ -1169,6 +1227,16 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->backupuid_specified = false; /* no backup intent for a user */
vol->backupgid_specified = false; /* no backup intent for a group */
+ /*
+ * For now, we ignore -EINVAL errors under the assumption that the
+ * unc= and prefixpath= options will be usable.
+ */
+ if (cifs_parse_devname(devname, vol) == -ENOMEM) {
+ printk(KERN_ERR "CIFS: Unable to allocate memory to parse "
+ "device string.\n");
+ goto out_nomem;
+ }
+
while ((data = strsep(&options, separator)) != NULL) {
substring_t args[MAX_OPT_ARGS];
unsigned long option;
@@ -1416,12 +1484,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->dir_mode = option;
break;
case Opt_port:
- if (get_option_ul(args, &option)) {
- cERROR(1, "%s: Invalid port value",
- __func__);
+ if (get_option_ul(args, &option) ||
+ option > USHRT_MAX) {
+ cERROR(1, "%s: Invalid port value", __func__);
goto cifs_parse_mount_err;
}
- vol->port = option;
+ port = (unsigned short)option;
break;
case Opt_rsize:
if (get_option_ul(args, &option)) {
@@ -1537,53 +1605,48 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->password[j] = '\0';
break;
case Opt_blank_ip:
- vol->UNCip = NULL;
+ /* FIXME: should this be an error instead? */
+ got_ip = false;
break;
case Opt_ip:
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- if (strnlen(string, INET6_ADDRSTRLEN) >
- INET6_ADDRSTRLEN) {
- printk(KERN_WARNING "CIFS: ip address "
- "too long\n");
- goto cifs_parse_mount_err;
- }
- vol->UNCip = kstrdup(string, GFP_KERNEL);
- if (!vol->UNCip) {
- printk(KERN_WARNING "CIFS: no memory "
- "for UNC IP\n");
+ if (!cifs_convert_address(dstaddr, string,
+ strlen(string))) {
+ printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
+ string);
goto cifs_parse_mount_err;
}
+ got_ip = true;
break;
case Opt_unc:
- string = match_strdup(args);
- if (string == NULL)
+ string = vol->UNC;
+ vol->UNC = match_strdup(args);
+ if (vol->UNC == NULL) {
+ kfree(string);
goto out_nomem;
-
- temp_len = strnlen(string, 300);
- if (temp_len == 300) {
- printk(KERN_WARNING "CIFS: UNC name too long\n");
- goto cifs_parse_mount_err;
}
- vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
- if (vol->UNC == NULL) {
- printk(KERN_WARNING "CIFS: no memory for UNC\n");
- goto cifs_parse_mount_err;
- }
- strcpy(vol->UNC, string);
-
- if (strncmp(string, "//", 2) == 0) {
- vol->UNC[0] = '\\';
- vol->UNC[1] = '\\';
- } else if (strncmp(string, "\\\\", 2) != 0) {
- printk(KERN_WARNING "CIFS: UNC Path does not "
- "begin with // or \\\\\n");
+ convert_delimiter(vol->UNC, '\\');
+ if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') {
+ kfree(string);
+ printk(KERN_ERR "CIFS: UNC Path does not "
+ "begin with // or \\\\\n");
goto cifs_parse_mount_err;
}
+ /* Compare old unc= option to new one */
+ if (!string || strcmp(string, vol->UNC))
+ printk(KERN_WARNING "CIFS: the value of the "
+ "unc= mount option does not match the "
+ "device string. Using the unc= option "
+ "for now. In 3.10, that option will "
+ "be ignored and the contents of the "
+ "device string will be used "
+ "instead. (%s != %s)\n", string,
+ vol->UNC);
break;
case Opt_domain:
string = match_strdup(args);
@@ -1618,31 +1681,26 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
}
break;
case Opt_prefixpath:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
-
- temp_len = strnlen(string, 1024);
- if (string[0] != '/')
- temp_len++; /* missing leading slash */
- if (temp_len > 1024) {
- printk(KERN_WARNING "CIFS: prefix too long\n");
- goto cifs_parse_mount_err;
- }
+ /* skip over any leading delimiter */
+ if (*args[0].from == '/' || *args[0].from == '\\')
+ args[0].from++;
- vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
+ string = vol->prepath;
+ vol->prepath = match_strdup(args);
if (vol->prepath == NULL) {
- printk(KERN_WARNING "CIFS: no memory "
- "for path prefix\n");
- goto cifs_parse_mount_err;
+ kfree(string);
+ goto out_nomem;
}
-
- if (string[0] != '/') {
- vol->prepath[0] = '/';
- strcpy(vol->prepath+1, string);
- } else
- strcpy(vol->prepath, string);
-
+ /* Compare old prefixpath= option to new one */
+ if (!string || strcmp(string, vol->prepath))
+ printk(KERN_WARNING "CIFS: the value of the "
+ "prefixpath= mount option does not "
+ "match the device string. Using the "
+ "prefixpath= option for now. In 3.10, "
+ "that option will be ignored and the "
+ "contents of the device string will be "
+ "used instead.(%s != %s)\n", string,
+ vol->prepath);
break;
case Opt_iocharset:
string = match_strdup(args);
@@ -1799,9 +1857,30 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
goto cifs_parse_mount_err;
}
#endif
+ if (!vol->UNC) {
+ cERROR(1, "CIFS mount error: No usable UNC path provided in "
+ "device string or in unc= option!");
+ goto cifs_parse_mount_err;
+ }
- if (vol->UNCip == NULL)
- vol->UNCip = &vol->UNC[2];
+ /* make sure UNC has a share name */
+ if (!strchr(vol->UNC + 3, '\\')) {
+ cERROR(1, "Malformed UNC. Unable to find share name.");
+ goto cifs_parse_mount_err;
+ }
+
+ if (!got_ip) {
+ /* No ip= option specified? Try to get it from UNC */
+ if (!cifs_convert_address(dstaddr, &vol->UNC[2],
+ strlen(&vol->UNC[2]))) {
+ printk(KERN_ERR "Unable to determine destination "
+ "address.\n");
+ goto cifs_parse_mount_err;
+ }
+ }
+
+ /* set the port that we got earlier */
+ cifs_set_port(dstaddr, port);
if (uid_specified)
vol->override_uid = override_uid;
@@ -1972,9 +2051,10 @@ match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
return true;
}
-static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
- struct smb_vol *vol)
+static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
{
+ struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
+
if ((server->vals != vol->vals) || (server->ops != vol->ops))
return 0;
@@ -1995,13 +2075,13 @@ static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
}
static struct TCP_Server_Info *
-cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
+cifs_find_tcp_session(struct smb_vol *vol)
{
struct TCP_Server_Info *server;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
- if (!match_server(server, addr, vol))
+ if (!match_server(server, vol))
continue;
++server->srv_count;
@@ -2051,40 +2131,12 @@ static struct TCP_Server_Info *
cifs_get_tcp_session(struct smb_vol *volume_info)
{
struct TCP_Server_Info *tcp_ses = NULL;
- struct sockaddr_storage addr;
- struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
- struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
int rc;
- memset(&addr, 0, sizeof(struct sockaddr_storage));
-
- cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
-
- if (volume_info->UNCip && volume_info->UNC) {
- rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
- volume_info->UNCip,
- strlen(volume_info->UNCip),
- volume_info->port);
- if (!rc) {
- /* we failed translating address */
- rc = -EINVAL;
- goto out_err;
- }
- } else if (volume_info->UNCip) {
- /* BB using ip addr as tcp_ses name to connect to the
- DFS root below */
- cERROR(1, "Connecting to DFS root not implemented yet");
- rc = -EINVAL;
- goto out_err;
- } else /* which tcp_sess DFS root would we conect to */ {
- cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
- "unc=//192.168.1.100/public) specified");
- rc = -EINVAL;
- goto out_err;
- }
+ cFYI(1, "UNC: %s", volume_info->UNC);
/* see if we already have a matching tcp_ses */
- tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
+ tcp_ses = cifs_find_tcp_session(volume_info);
if (tcp_ses)
return tcp_ses;
@@ -2129,27 +2181,18 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
-
+ memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
+ sizeof(tcp_ses->srcaddr));
+ memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
+ sizeof(tcp_ses->dstaddr));
/*
* at this point we are the only ones with the pointer
* to the struct since the kernel thread not created yet
* no need to spinlock this init of tcpStatus or srv_count
*/
tcp_ses->tcpStatus = CifsNew;
- memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
- sizeof(tcp_ses->srcaddr));
++tcp_ses->srv_count;
- if (addr.ss_family == AF_INET6) {
- cFYI(1, "attempting ipv6 connect");
- /* BB should we allow ipv6 on port 139? */
- /* other OS never observed in Wild doing 139 with v6 */
- memcpy(&tcp_ses->dstaddr, sin_server6,
- sizeof(struct sockaddr_in6));
- } else
- memcpy(&tcp_ses->dstaddr, sin_server,
- sizeof(struct sockaddr_in));
-
rc = ip_connect(tcp_ses);
if (rc < 0) {
cERROR(1, "Error connecting to socket. Aborting operation");
@@ -2397,8 +2440,6 @@ cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
}
#endif /* CONFIG_KEYS */
-static bool warned_on_ntlm; /* globals init to false automatically */
-
static struct cifs_ses *
cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
{
@@ -2475,14 +2516,6 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
ses->cred_uid = volume_info->cred_uid;
ses->linux_uid = volume_info->linux_uid;
- /* ntlmv2 is much stronger than ntlm security, and has been broadly
- supported for many years, time to update default security mechanism */
- if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
- warned_on_ntlm = true;
- cERROR(1, "default security mechanism requested. The default "
- "security mechanism will be upgraded from ntlm to "
- "ntlmv2 in kernel release 3.3");
- }
ses->overrideSecFlg = volume_info->secFlg;
mutex_lock(&ses->session_mutex);
@@ -2598,13 +2631,6 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
}
}
- if (strchr(volume_info->UNC + 3, '\\') == NULL
- && strchr(volume_info->UNC + 3, '/') == NULL) {
- cERROR(1, "Missing share name");
- rc = -ENODEV;
- goto out_fail;
- }
-
/*
* BB Do we need to wrap session_mutex around this TCon call and Unix
* SetFS as we do on SessSetup and reconnect?
@@ -2718,11 +2744,8 @@ cifs_match_super(struct super_block *sb, void *data)
struct cifs_ses *ses;
struct cifs_tcon *tcon;
struct tcon_link *tlink;
- struct sockaddr_storage addr;
int rc = 0;
- memset(&addr, 0, sizeof(struct sockaddr_storage));
-
spin_lock(&cifs_tcp_ses_lock);
cifs_sb = CIFS_SB(sb);
tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
@@ -2736,17 +2759,7 @@ cifs_match_super(struct super_block *sb, void *data)
volume_info = mnt_data->vol;
- if (!volume_info->UNCip || !volume_info->UNC)
- goto out;
-
- rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
- volume_info->UNCip,
- strlen(volume_info->UNCip),
- volume_info->port);
- if (!rc)
- goto out;
-
- if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
+ if (!match_server(tcp_srv, volume_info) ||
!match_session(ses, volume_info) ||
!match_tcon(tcon, volume_info->UNC)) {
rc = 0;
@@ -3261,8 +3274,6 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
{
kfree(volume_info->username);
kzfree(volume_info->password);
- if (volume_info->UNCip != volume_info->UNC + 2)
- kfree(volume_info->UNCip);
kfree(volume_info->UNC);
kfree(volume_info->domainname);
kfree(volume_info->iocharset);
@@ -3280,14 +3291,16 @@ cifs_cleanup_volume_info(struct smb_vol *volume_info)
#ifdef CONFIG_CIFS_DFS_UPCALL
-/* build_path_to_root returns full path to root when
- * we do not have an exiting connection (tcon) */
+/*
+ * cifs_build_path_to_root returns full path to root when we do not have an
+ * exiting connection (tcon)
+ */
static char *
build_unc_path_to_root(const struct smb_vol *vol,
const struct cifs_sb_info *cifs_sb)
{
char *full_path, *pos;
- unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
+ unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
@@ -3298,6 +3311,7 @@ build_unc_path_to_root(const struct smb_vol *vol,
pos = full_path + unc_len;
if (pplen) {
+ *pos++ = CIFS_DIR_SEP(cifs_sb);
strncpy(pos, vol->prepath, pplen);
pos += pplen;
}
@@ -3353,7 +3367,6 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
mdata = NULL;
} else {
cleanup_volume_info_contents(volume_info);
- memset(volume_info, '\0', sizeof(*volume_info));
rc = cifs_setup_volume_info(volume_info, mdata,
fake_devname);
}
@@ -3375,7 +3388,6 @@ cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
if (cifs_parse_mount_options(mount_data, devname, volume_info))
return -EINVAL;
-
if (volume_info->nullauth) {
cFYI(1, "Anonymous login");
kfree(volume_info->username);
@@ -3412,7 +3424,7 @@ cifs_get_volume_info(char *mount_data, const char *devname)
int rc;
struct smb_vol *volume_info;
- volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
+ volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
if (!volume_info)
return ERR_PTR(-ENOMEM);
@@ -3537,8 +3549,10 @@ remote_path_check:
rc = -ENOSYS;
goto mount_fail_check;
}
- /* build_path_to_root works only when we have a valid tcon */
- full_path = build_path_to_root(volume_info, cifs_sb, tcon);
+ /*
+ * cifs_build_path_to_root works only when we have a valid tcon
+ */
+ full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
if (full_path == NULL) {
rc = -ENOMEM;
goto mount_fail_check;
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