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9 smb3 client fixes, mostly DFS or reconnect related
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Merge tag '6.4-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"smb3 client fixes, mostly DFS or reconnect related:
- Two DFS connection sharing fixes
- DFS refresh fix
- Reconnect fix
- Two potential use after free fixes
- Also print prefix patch in mount debug msg
- Two small cleanup fixes"
* tag '6.4-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Remove unneeded semicolon
cifs: fix sharing of DFS connections
cifs: avoid potential races when handling multiple dfs tcons
cifs: protect access of TCP_Server_Info::{origin,leaf}_fullpath
cifs: fix potential race when tree connecting ipc
cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname
cifs: print smb3_fs_context::source when mounting
cifs: protect session status check in smb2_reconnect()
SMB3.1.1: correct definition for app_instance_id create contexts
This commit is contained in:
Linus Torvalds
commit
63342b1dd5
@ -280,8 +280,10 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
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seq_printf(m, "\n%d) ConnectionId: 0x%llx ",
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c, server->conn_id);
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spin_lock(&server->srv_lock);
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if (server->hostname)
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seq_printf(m, "Hostname: %s ", server->hostname);
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spin_unlock(&server->srv_lock);
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#ifdef CONFIG_CIFS_SMB_DIRECT
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if (!server->rdma)
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goto skip_rdma;
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@ -623,10 +625,13 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
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server->fastest_cmd[j],
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server->slowest_cmd[j]);
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for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
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if (atomic_read(&server->smb2slowcmd[j]))
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if (atomic_read(&server->smb2slowcmd[j])) {
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spin_lock(&server->srv_lock);
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seq_printf(m, " %d slow responses from %s for command %d\n",
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atomic_read(&server->smb2slowcmd[j]),
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server->hostname, j);
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spin_unlock(&server->srv_lock);
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}
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#endif /* STATS2 */
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list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
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list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
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@ -81,19 +81,19 @@ do { \
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#define cifs_server_dbg_func(ratefunc, type, fmt, ...) \
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do { \
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const char *sn = ""; \
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if (server && server->hostname) \
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sn = server->hostname; \
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spin_lock(&server->srv_lock); \
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if ((type) & FYI && cifsFYI & CIFS_INFO) { \
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pr_debug_ ## ratefunc("%s: \\\\%s " fmt, \
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__FILE__, sn, ##__VA_ARGS__); \
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__FILE__, server->hostname, \
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##__VA_ARGS__); \
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} else if ((type) & VFS) { \
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pr_err_ ## ratefunc("VFS: \\\\%s " fmt, \
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sn, ##__VA_ARGS__); \
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server->hostname, ##__VA_ARGS__); \
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} else if ((type) & NOISY && (NOISY != 0)) { \
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pr_debug_ ## ratefunc("\\\\%s " fmt, \
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sn, ##__VA_ARGS__); \
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server->hostname, ##__VA_ARGS__); \
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} \
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spin_unlock(&server->srv_lock); \
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} while (0)
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#define cifs_server_dbg(type, fmt, ...) \
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@ -874,14 +874,12 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
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struct cifs_mnt_data mnt_data;
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struct dentry *root;
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/*
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* Prints in Kernel / CIFS log the attempted mount operation
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* If CIFS_DEBUG && cifs_FYI
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*/
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if (cifsFYI)
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cifs_dbg(FYI, "Devname: %s flags: %d\n", old_ctx->UNC, flags);
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else
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cifs_info("Attempting to mount %s\n", old_ctx->UNC);
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if (cifsFYI) {
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cifs_dbg(FYI, "%s: devname=%s flags=0x%x\n", __func__,
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old_ctx->source, flags);
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} else {
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cifs_info("Attempting to mount %s\n", old_ctx->source);
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}
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cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
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if (cifs_sb == NULL) {
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@ -736,17 +736,23 @@ struct TCP_Server_Info {
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#endif
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struct mutex refpath_lock; /* protects leaf_fullpath */
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/*
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* Canonical DFS full paths that were used to chase referrals in mount and reconnect.
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* origin_fullpath: Canonical copy of smb3_fs_context::source.
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* It is used for matching existing DFS tcons.
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*
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* origin_fullpath: first or original referral path
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* leaf_fullpath: last referral path (might be changed due to nested links in reconnect)
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* leaf_fullpath: Canonical DFS referral path related to this
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* connection.
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* It is used in DFS cache refresher, reconnect and may
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* change due to nested DFS links.
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*
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* current_fullpath: pointer to either origin_fullpath or leaf_fullpath
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* NOTE: cannot be accessed outside cifs_reconnect() and smb2_reconnect()
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* Both protected by @refpath_lock and @srv_lock. The @refpath_lock is
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* mosly used for not requiring a copy of @leaf_fullpath when getting
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* cached or new DFS referrals (which might also sleep during I/O).
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* While @srv_lock is held for making string and NULL comparions against
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* both fields as in mount(2) and cache refresh.
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*
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* format: \\HOST\SHARE\[OPTIONAL PATH]
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* format: \\HOST\SHARE[\OPTIONAL PATH]
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*/
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char *origin_fullpath, *leaf_fullpath, *current_fullpath;
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char *origin_fullpath, *leaf_fullpath;
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};
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static inline bool is_smb1(struct TCP_Server_Info *server)
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@ -1232,8 +1238,8 @@ struct cifs_tcon {
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struct cached_fids *cfids;
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/* BB add field for back pointer to sb struct(s)? */
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#ifdef CONFIG_CIFS_DFS_UPCALL
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struct list_head ulist; /* cache update list */
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struct list_head dfs_ses_list;
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struct delayed_work dfs_cache_work;
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#endif
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struct delayed_work query_interfaces; /* query interfaces workqueue job */
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};
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@ -1750,7 +1756,6 @@ struct cifs_mount_ctx {
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struct TCP_Server_Info *server;
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struct cifs_ses *ses;
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struct cifs_tcon *tcon;
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char *origin_fullpath, *leaf_fullpath;
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struct list_head dfs_ses_list;
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};
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@ -8,6 +8,7 @@
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#ifndef _CIFSPROTO_H
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#define _CIFSPROTO_H
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#include <linux/nls.h>
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#include <linux/ctype.h>
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#include "trace.h"
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#ifdef CONFIG_CIFS_DFS_UPCALL
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#include "dfs_cache.h"
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@ -572,7 +573,7 @@ extern int E_md4hash(const unsigned char *passwd, unsigned char *p16,
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extern struct TCP_Server_Info *
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cifs_find_tcp_session(struct smb3_fs_context *ctx);
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extern void cifs_put_smb_ses(struct cifs_ses *ses);
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void __cifs_put_smb_ses(struct cifs_ses *ses);
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extern struct cifs_ses *
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cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx);
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@ -696,4 +697,45 @@ struct super_block *cifs_get_tcon_super(struct cifs_tcon *tcon);
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void cifs_put_tcon_super(struct super_block *sb);
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int cifs_wait_for_server_reconnect(struct TCP_Server_Info *server, bool retry);
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/* Put references of @ses and @ses->dfs_root_ses */
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static inline void cifs_put_smb_ses(struct cifs_ses *ses)
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{
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struct cifs_ses *rses = ses->dfs_root_ses;
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__cifs_put_smb_ses(ses);
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if (rses)
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__cifs_put_smb_ses(rses);
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}
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/* Get an active reference of @ses and @ses->dfs_root_ses.
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*
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* NOTE: make sure to call this function when incrementing reference count of
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* @ses to ensure that any DFS root session attached to it (@ses->dfs_root_ses)
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* will also get its reference count incremented.
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*
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* cifs_put_smb_ses() will put both references, so call it when you're done.
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*/
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static inline void cifs_smb_ses_inc_refcount(struct cifs_ses *ses)
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{
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lockdep_assert_held(&cifs_tcp_ses_lock);
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ses->ses_count++;
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if (ses->dfs_root_ses)
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ses->dfs_root_ses->ses_count++;
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}
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static inline bool dfs_src_pathname_equal(const char *s1, const char *s2)
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{
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if (strlen(s1) != strlen(s2))
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return false;
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for (; *s1; s1++, s2++) {
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if (*s1 == '/' || *s1 == '\\') {
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if (*s2 != '/' && *s2 != '\\')
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return false;
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} else if (tolower(*s1) != tolower(*s2))
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return false;
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}
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return true;
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}
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#endif /* _CIFSPROTO_H */
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@ -403,8 +403,10 @@ static int __reconnect_target_unlocked(struct TCP_Server_Info *server, const cha
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if (server->hostname != target) {
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hostname = extract_hostname(target);
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if (!IS_ERR(hostname)) {
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spin_lock(&server->srv_lock);
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kfree(server->hostname);
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server->hostname = hostname;
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spin_unlock(&server->srv_lock);
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} else {
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cifs_dbg(FYI, "%s: couldn't extract hostname or address from dfs target: %ld\n",
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__func__, PTR_ERR(hostname));
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@ -452,7 +454,6 @@ static int reconnect_target_unlocked(struct TCP_Server_Info *server, struct dfs_
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static int reconnect_dfs_server(struct TCP_Server_Info *server)
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{
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int rc = 0;
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const char *refpath = server->current_fullpath + 1;
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struct dfs_cache_tgt_list tl = DFS_CACHE_TGT_LIST_INIT(tl);
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struct dfs_cache_tgt_iterator *target_hint = NULL;
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int num_targets = 0;
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@ -465,8 +466,10 @@ static int reconnect_dfs_server(struct TCP_Server_Info *server)
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* through /proc/fs/cifs/dfscache or the target list is empty due to server settings after
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* refreshing the referral, so, in this case, default it to 1.
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*/
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if (!dfs_cache_noreq_find(refpath, NULL, &tl))
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mutex_lock(&server->refpath_lock);
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if (!dfs_cache_noreq_find(server->leaf_fullpath + 1, NULL, &tl))
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num_targets = dfs_cache_get_nr_tgts(&tl);
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mutex_unlock(&server->refpath_lock);
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if (!num_targets)
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num_targets = 1;
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@ -510,7 +513,9 @@ static int reconnect_dfs_server(struct TCP_Server_Info *server)
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mod_delayed_work(cifsiod_wq, &server->reconnect, 0);
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} while (server->tcpStatus == CifsNeedReconnect);
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dfs_cache_noreq_update_tgthint(refpath, target_hint);
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mutex_lock(&server->refpath_lock);
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dfs_cache_noreq_update_tgthint(server->leaf_fullpath + 1, target_hint);
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mutex_unlock(&server->refpath_lock);
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dfs_cache_free_tgts(&tl);
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/* Need to set up echo worker again once connection has been established */
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@ -561,9 +566,7 @@ cifs_echo_request(struct work_struct *work)
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goto requeue_echo;
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rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
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if (rc)
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cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
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server->hostname);
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cifs_server_dbg(FYI, "send echo request: rc = %d\n", rc);
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/* Check witness registrations */
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cifs_swn_check();
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@ -993,10 +996,8 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server)
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*/
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}
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#ifdef CONFIG_CIFS_DFS_UPCALL
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kfree(server->origin_fullpath);
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kfree(server->leaf_fullpath);
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#endif
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kfree(server);
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length = atomic_dec_return(&tcpSesAllocCount);
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@ -1384,26 +1385,13 @@ match_security(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
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return true;
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}
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static bool dfs_src_pathname_equal(const char *s1, const char *s2)
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{
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if (strlen(s1) != strlen(s2))
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return false;
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for (; *s1; s1++, s2++) {
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if (*s1 == '/' || *s1 == '\\') {
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if (*s2 != '/' && *s2 != '\\')
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return false;
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} else if (tolower(*s1) != tolower(*s2))
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return false;
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}
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return true;
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}
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/* this function must be called with srv_lock held */
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static int match_server(struct TCP_Server_Info *server, struct smb3_fs_context *ctx,
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bool dfs_super_cmp)
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static int match_server(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
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{
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struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
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lockdep_assert_held(&server->srv_lock);
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if (ctx->nosharesock)
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return 0;
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@ -1429,27 +1417,41 @@ static int match_server(struct TCP_Server_Info *server, struct smb3_fs_context *
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(struct sockaddr *)&server->srcaddr))
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return 0;
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/*
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* When matching DFS superblocks, we only check for original source pathname as the
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* currently connected target might be different than the one parsed earlier in i.e.
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* mount.cifs(8).
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* - Match for an DFS tcon (@server->origin_fullpath).
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* - Match for an DFS root server connection (@server->leaf_fullpath).
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* - If none of the above and @ctx->leaf_fullpath is set, then
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* it is a new DFS connection.
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* - If 'nodfs' mount option was passed, then match only connections
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* that have no DFS referrals set
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* (e.g. can't failover to other targets).
|
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*/
|
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if (dfs_super_cmp) {
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if (!ctx->source || !server->origin_fullpath ||
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!dfs_src_pathname_equal(server->origin_fullpath, ctx->source))
|
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return 0;
|
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} else {
|
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/* Skip addr, hostname and port matching for DFS connections */
|
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if (server->leaf_fullpath) {
|
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if (!ctx->leaf_fullpath ||
|
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strcasecmp(server->leaf_fullpath, ctx->leaf_fullpath))
|
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if (!ctx->nodfs) {
|
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if (ctx->source && server->origin_fullpath) {
|
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if (!dfs_src_pathname_equal(ctx->source,
|
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server->origin_fullpath))
|
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return 0;
|
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} else if (strcasecmp(server->hostname, ctx->server_hostname) ||
|
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!match_server_address(server, addr) ||
|
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!match_port(server, addr)) {
|
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} else if (server->leaf_fullpath) {
|
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if (!ctx->leaf_fullpath ||
|
||||
strcasecmp(server->leaf_fullpath,
|
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ctx->leaf_fullpath))
|
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return 0;
|
||||
} else if (ctx->leaf_fullpath) {
|
||||
return 0;
|
||||
}
|
||||
} else if (server->origin_fullpath || server->leaf_fullpath) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Match for a regular connection (address/hostname/port) which has no
|
||||
* DFS referrals set.
|
||||
*/
|
||||
if (!server->origin_fullpath && !server->leaf_fullpath &&
|
||||
(strcasecmp(server->hostname, ctx->server_hostname) ||
|
||||
!match_server_address(server, addr) ||
|
||||
!match_port(server, addr)))
|
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return 0;
|
||||
|
||||
if (!match_security(server, ctx))
|
||||
return 0;
|
||||
|
||||
@ -1480,7 +1482,7 @@ cifs_find_tcp_session(struct smb3_fs_context *ctx)
|
||||
* Skip ses channels since they're only handled in lower layers
|
||||
* (e.g. cifs_send_recv).
|
||||
*/
|
||||
if (CIFS_SERVER_IS_CHAN(server) || !match_server(server, ctx, false)) {
|
||||
if (CIFS_SERVER_IS_CHAN(server) || !match_server(server, ctx)) {
|
||||
spin_unlock(&server->srv_lock);
|
||||
continue;
|
||||
}
|
||||
@ -1580,7 +1582,6 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx,
|
||||
rc = -ENOMEM;
|
||||
goto out_err;
|
||||
}
|
||||
tcp_ses->current_fullpath = tcp_ses->leaf_fullpath;
|
||||
}
|
||||
|
||||
if (ctx->nosharesock)
|
||||
@ -1810,7 +1811,9 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb3_fs_context *ctx)
|
||||
if (tcon == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
spin_lock(&server->srv_lock);
|
||||
scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", server->hostname);
|
||||
spin_unlock(&server->srv_lock);
|
||||
|
||||
xid = get_xid();
|
||||
tcon->ses = ses;
|
||||
@ -1863,7 +1866,7 @@ cifs_free_ipc(struct cifs_ses *ses)
|
||||
static struct cifs_ses *
|
||||
cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
|
||||
{
|
||||
struct cifs_ses *ses;
|
||||
struct cifs_ses *ses, *ret = NULL;
|
||||
|
||||
spin_lock(&cifs_tcp_ses_lock);
|
||||
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
|
||||
@ -1873,23 +1876,22 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
|
||||
continue;
|
||||
}
|
||||
spin_lock(&ses->chan_lock);
|
||||
if (!match_session(ses, ctx)) {
|
||||
if (match_session(ses, ctx)) {
|
||||
spin_unlock(&ses->chan_lock);
|
||||
spin_unlock(&ses->ses_lock);
|
||||
continue;
|
||||
ret = ses;
|
||||
break;
|
||||
}
|
||||
spin_unlock(&ses->chan_lock);
|
||||
spin_unlock(&ses->ses_lock);
|
||||
|
||||
++ses->ses_count;
|
||||
spin_unlock(&cifs_tcp_ses_lock);
|
||||
return ses;
|
||||
}
|
||||
if (ret)
|
||||
cifs_smb_ses_inc_refcount(ret);
|
||||
spin_unlock(&cifs_tcp_ses_lock);
|
||||
return NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
void cifs_put_smb_ses(struct cifs_ses *ses)
|
||||
void __cifs_put_smb_ses(struct cifs_ses *ses)
|
||||
{
|
||||
unsigned int rc, xid;
|
||||
unsigned int chan_count;
|
||||
@ -2244,6 +2246,8 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx)
|
||||
*/
|
||||
spin_lock(&cifs_tcp_ses_lock);
|
||||
ses->dfs_root_ses = ctx->dfs_root_ses;
|
||||
if (ses->dfs_root_ses)
|
||||
ses->dfs_root_ses->ses_count++;
|
||||
list_add(&ses->smb_ses_list, &server->smb_ses_list);
|
||||
spin_unlock(&cifs_tcp_ses_lock);
|
||||
|
||||
@ -2260,12 +2264,15 @@ get_ses_fail:
|
||||
}
|
||||
|
||||
/* this function must be called with tc_lock held */
|
||||
static int match_tcon(struct cifs_tcon *tcon, struct smb3_fs_context *ctx, bool dfs_super_cmp)
|
||||
static int match_tcon(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
|
||||
{
|
||||
struct TCP_Server_Info *server = tcon->ses->server;
|
||||
|
||||
if (tcon->status == TID_EXITING)
|
||||
return 0;
|
||||
/* Skip UNC validation when matching DFS superblocks */
|
||||
if (!dfs_super_cmp && strncmp(tcon->tree_name, ctx->UNC, MAX_TREE_SIZE))
|
||||
/* Skip UNC validation when matching DFS connections or superblocks */
|
||||
if (!server->origin_fullpath && !server->leaf_fullpath &&
|
||||
strncmp(tcon->tree_name, ctx->UNC, MAX_TREE_SIZE))
|
||||
return 0;
|
||||
if (tcon->seal != ctx->seal)
|
||||
return 0;
|
||||
@ -2288,7 +2295,7 @@ cifs_find_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
|
||||
spin_lock(&cifs_tcp_ses_lock);
|
||||
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
|
||||
spin_lock(&tcon->tc_lock);
|
||||
if (!match_tcon(tcon, ctx, false)) {
|
||||
if (!match_tcon(tcon, ctx)) {
|
||||
spin_unlock(&tcon->tc_lock);
|
||||
continue;
|
||||
}
|
||||
@ -2334,6 +2341,9 @@ cifs_put_tcon(struct cifs_tcon *tcon)
|
||||
|
||||
/* cancel polling of interfaces */
|
||||
cancel_delayed_work_sync(&tcon->query_interfaces);
|
||||
#ifdef CONFIG_CIFS_DFS_UPCALL
|
||||
cancel_delayed_work_sync(&tcon->dfs_cache_work);
|
||||
#endif
|
||||
|
||||
if (tcon->use_witness) {
|
||||
int rc;
|
||||
@ -2581,7 +2591,9 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
|
||||
queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
|
||||
(SMB_INTERFACE_POLL_INTERVAL * HZ));
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CIFS_DFS_UPCALL
|
||||
INIT_DELAYED_WORK(&tcon->dfs_cache_work, dfs_cache_refresh);
|
||||
#endif
|
||||
spin_lock(&cifs_tcp_ses_lock);
|
||||
list_add(&tcon->tcon_list, &ses->tcon_list);
|
||||
spin_unlock(&cifs_tcp_ses_lock);
|
||||
@ -2659,9 +2671,11 @@ compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data)
|
||||
static int match_prepath(struct super_block *sb,
|
||||
struct TCP_Server_Info *server,
|
||||
struct cifs_mnt_data *mnt_data)
|
||||
{
|
||||
struct smb3_fs_context *ctx = mnt_data->ctx;
|
||||
struct cifs_sb_info *old = CIFS_SB(sb);
|
||||
struct cifs_sb_info *new = mnt_data->cifs_sb;
|
||||
bool old_set = (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) &&
|
||||
@ -2669,6 +2683,10 @@ match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data)
|
||||
bool new_set = (new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) &&
|
||||
new->prepath;
|
||||
|
||||
if (server->origin_fullpath &&
|
||||
dfs_src_pathname_equal(server->origin_fullpath, ctx->source))
|
||||
return 1;
|
||||
|
||||
if (old_set && new_set && !strcmp(new->prepath, old->prepath))
|
||||
return 1;
|
||||
else if (!old_set && !new_set)
|
||||
@ -2687,7 +2705,6 @@ cifs_match_super(struct super_block *sb, void *data)
|
||||
struct cifs_ses *ses;
|
||||
struct cifs_tcon *tcon;
|
||||
struct tcon_link *tlink;
|
||||
bool dfs_super_cmp;
|
||||
int rc = 0;
|
||||
|
||||
spin_lock(&cifs_tcp_ses_lock);
|
||||
@ -2702,18 +2719,16 @@ cifs_match_super(struct super_block *sb, void *data)
|
||||
ses = tcon->ses;
|
||||
tcp_srv = ses->server;
|
||||
|
||||
dfs_super_cmp = IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && tcp_srv->origin_fullpath;
|
||||
|
||||
ctx = mnt_data->ctx;
|
||||
|
||||
spin_lock(&tcp_srv->srv_lock);
|
||||
spin_lock(&ses->ses_lock);
|
||||
spin_lock(&ses->chan_lock);
|
||||
spin_lock(&tcon->tc_lock);
|
||||
if (!match_server(tcp_srv, ctx, dfs_super_cmp) ||
|
||||
if (!match_server(tcp_srv, ctx) ||
|
||||
!match_session(ses, ctx) ||
|
||||
!match_tcon(tcon, ctx, dfs_super_cmp) ||
|
||||
!match_prepath(sb, mnt_data)) {
|
||||
!match_tcon(tcon, ctx) ||
|
||||
!match_prepath(sb, tcp_srv, mnt_data)) {
|
||||
rc = 0;
|
||||
goto out;
|
||||
}
|
||||
@ -3458,8 +3473,6 @@ out:
|
||||
|
||||
error:
|
||||
dfs_put_root_smb_sessions(&mnt_ctx.dfs_ses_list);
|
||||
kfree(mnt_ctx.origin_fullpath);
|
||||
kfree(mnt_ctx.leaf_fullpath);
|
||||
cifs_mount_put_conns(&mnt_ctx);
|
||||
return rc;
|
||||
}
|
||||
|
||||
137
fs/cifs/dfs.c
137
fs/cifs/dfs.c
@ -99,7 +99,7 @@ static int get_session(struct cifs_mount_ctx *mnt_ctx, const char *full_path)
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int get_root_smb_session(struct cifs_mount_ctx *mnt_ctx)
|
||||
static int add_root_smb_session(struct cifs_mount_ctx *mnt_ctx)
|
||||
{
|
||||
struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
|
||||
struct dfs_root_ses *root_ses;
|
||||
@ -127,7 +127,7 @@ static int get_dfs_conn(struct cifs_mount_ctx *mnt_ctx, const char *ref_path, co
|
||||
{
|
||||
struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
|
||||
struct dfs_info3_param ref = {};
|
||||
bool is_refsrv = false;
|
||||
bool is_refsrv;
|
||||
int rc, rc2;
|
||||
|
||||
rc = dfs_cache_get_tgt_referral(ref_path + 1, tit, &ref);
|
||||
@ -157,8 +157,10 @@ static int get_dfs_conn(struct cifs_mount_ctx *mnt_ctx, const char *ref_path, co
|
||||
rc = cifs_is_path_remote(mnt_ctx);
|
||||
}
|
||||
|
||||
dfs_cache_noreq_update_tgthint(ref_path + 1, tit);
|
||||
|
||||
if (rc == -EREMOTE && is_refsrv) {
|
||||
rc2 = get_root_smb_session(mnt_ctx);
|
||||
rc2 = add_root_smb_session(mnt_ctx);
|
||||
if (rc2)
|
||||
rc = rc2;
|
||||
}
|
||||
@ -248,16 +250,19 @@ static int __dfs_mount_share(struct cifs_mount_ctx *mnt_ctx)
|
||||
tcon = mnt_ctx->tcon;
|
||||
|
||||
mutex_lock(&server->refpath_lock);
|
||||
spin_lock(&server->srv_lock);
|
||||
if (!server->origin_fullpath) {
|
||||
server->origin_fullpath = origin_fullpath;
|
||||
server->current_fullpath = server->leaf_fullpath;
|
||||
origin_fullpath = NULL;
|
||||
}
|
||||
spin_unlock(&server->srv_lock);
|
||||
mutex_unlock(&server->refpath_lock);
|
||||
|
||||
if (list_empty(&tcon->dfs_ses_list)) {
|
||||
list_replace_init(&mnt_ctx->dfs_ses_list,
|
||||
&tcon->dfs_ses_list);
|
||||
queue_delayed_work(dfscache_wq, &tcon->dfs_cache_work,
|
||||
dfs_cache_get_ttl() * HZ);
|
||||
} else {
|
||||
dfs_put_root_smb_sessions(&mnt_ctx->dfs_ses_list);
|
||||
}
|
||||
@ -272,15 +277,21 @@ out:
|
||||
|
||||
int dfs_mount_share(struct cifs_mount_ctx *mnt_ctx, bool *isdfs)
|
||||
{
|
||||
struct cifs_sb_info *cifs_sb = mnt_ctx->cifs_sb;
|
||||
struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
|
||||
struct cifs_ses *ses;
|
||||
char *source = ctx->source;
|
||||
bool nodfs = ctx->nodfs;
|
||||
int rc;
|
||||
|
||||
*isdfs = false;
|
||||
|
||||
/* Temporarily set @ctx->source to NULL as we're not matching DFS
|
||||
* superblocks yet. See cifs_match_super() and match_server().
|
||||
*/
|
||||
ctx->source = NULL;
|
||||
rc = get_session(mnt_ctx, NULL);
|
||||
if (rc)
|
||||
return rc;
|
||||
goto out;
|
||||
|
||||
ctx->dfs_root_ses = mnt_ctx->ses;
|
||||
/*
|
||||
* If called with 'nodfs' mount option, then skip DFS resolving. Otherwise unconditionally
|
||||
@ -289,23 +300,41 @@ int dfs_mount_share(struct cifs_mount_ctx *mnt_ctx, bool *isdfs)
|
||||
* Skip prefix path to provide support for DFS referrals from w2k8 servers which don't seem
|
||||
* to respond with PATH_NOT_COVERED to requests that include the prefix.
|
||||
*/
|
||||
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) ||
|
||||
dfs_get_referral(mnt_ctx, ctx->UNC + 1, NULL, NULL)) {
|
||||
if (!nodfs) {
|
||||
rc = dfs_get_referral(mnt_ctx, ctx->UNC + 1, NULL, NULL);
|
||||
if (rc) {
|
||||
if (rc != -ENOENT && rc != -EOPNOTSUPP)
|
||||
goto out;
|
||||
nodfs = true;
|
||||
}
|
||||
}
|
||||
if (nodfs) {
|
||||
rc = cifs_mount_get_tcon(mnt_ctx);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
rc = cifs_is_path_remote(mnt_ctx);
|
||||
if (!rc || rc != -EREMOTE)
|
||||
return rc;
|
||||
if (!rc)
|
||||
rc = cifs_is_path_remote(mnt_ctx);
|
||||
goto out;
|
||||
}
|
||||
|
||||
*isdfs = true;
|
||||
rc = get_root_smb_session(mnt_ctx);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
return __dfs_mount_share(mnt_ctx);
|
||||
/*
|
||||
* Prevent DFS root session of being put in the first call to
|
||||
* cifs_mount_put_conns(). If another DFS root server was not found
|
||||
* while chasing the referrals (@ctx->dfs_root_ses == @ses), then we
|
||||
* can safely put extra refcount of @ses.
|
||||
*/
|
||||
ses = mnt_ctx->ses;
|
||||
mnt_ctx->ses = NULL;
|
||||
mnt_ctx->server = NULL;
|
||||
rc = __dfs_mount_share(mnt_ctx);
|
||||
if (ses == ctx->dfs_root_ses)
|
||||
cifs_put_smb_ses(ses);
|
||||
out:
|
||||
/*
|
||||
* Restore previous value of @ctx->source so DFS superblock can be
|
||||
* matched in cifs_match_super().
|
||||
*/
|
||||
ctx->source = source;
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Update dfs referral path of superblock */
|
||||
@ -342,10 +371,11 @@ static int update_server_fullpath(struct TCP_Server_Info *server, struct cifs_sb
|
||||
rc = PTR_ERR(npath);
|
||||
} else {
|
||||
mutex_lock(&server->refpath_lock);
|
||||
spin_lock(&server->srv_lock);
|
||||
kfree(server->leaf_fullpath);
|
||||
server->leaf_fullpath = npath;
|
||||
spin_unlock(&server->srv_lock);
|
||||
mutex_unlock(&server->refpath_lock);
|
||||
server->current_fullpath = server->leaf_fullpath;
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
@ -374,6 +404,54 @@ static int target_share_matches_server(struct TCP_Server_Info *server, char *sha
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void __tree_connect_ipc(const unsigned int xid, char *tree,
|
||||
struct cifs_sb_info *cifs_sb,
|
||||
struct cifs_ses *ses)
|
||||
{
|
||||
struct TCP_Server_Info *server = ses->server;
|
||||
struct cifs_tcon *tcon = ses->tcon_ipc;
|
||||
int rc;
|
||||
|
||||
spin_lock(&ses->ses_lock);
|
||||
spin_lock(&ses->chan_lock);
|
||||
if (cifs_chan_needs_reconnect(ses, server) ||
|
||||
ses->ses_status != SES_GOOD) {
|
||||
spin_unlock(&ses->chan_lock);
|
||||
spin_unlock(&ses->ses_lock);
|
||||
cifs_server_dbg(FYI, "%s: skipping ipc reconnect due to disconnected ses\n",
|
||||
__func__);
|
||||
return;
|
||||
}
|
||||
spin_unlock(&ses->chan_lock);
|
||||
spin_unlock(&ses->ses_lock);
|
||||
|
||||
cifs_server_lock(server);
|
||||
scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$", server->hostname);
|
||||
cifs_server_unlock(server);
|
||||
|
||||
rc = server->ops->tree_connect(xid, ses, tree, tcon,
|
||||
cifs_sb->local_nls);
|
||||
cifs_server_dbg(FYI, "%s: tree_reconnect %s: %d\n", __func__, tree, rc);
|
||||
spin_lock(&tcon->tc_lock);
|
||||
if (rc) {
|
||||
tcon->status = TID_NEED_TCON;
|
||||
} else {
|
||||
tcon->status = TID_GOOD;
|
||||
tcon->need_reconnect = false;
|
||||
}
|
||||
spin_unlock(&tcon->tc_lock);
|
||||
}
|
||||
|
||||
static void tree_connect_ipc(const unsigned int xid, char *tree,
|
||||
struct cifs_sb_info *cifs_sb,
|
||||
struct cifs_tcon *tcon)
|
||||
{
|
||||
struct cifs_ses *ses = tcon->ses;
|
||||
|
||||
__tree_connect_ipc(xid, tree, cifs_sb, ses);
|
||||
__tree_connect_ipc(xid, tree, cifs_sb, CIFS_DFS_ROOT_SES(ses));
|
||||
}
|
||||
|
||||
static int __tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *tcon,
|
||||
struct cifs_sb_info *cifs_sb, char *tree, bool islink,
|
||||
struct dfs_cache_tgt_list *tl)
|
||||
@ -382,7 +460,6 @@ static int __tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *t
|
||||
struct TCP_Server_Info *server = tcon->ses->server;
|
||||
const struct smb_version_operations *ops = server->ops;
|
||||
struct cifs_ses *root_ses = CIFS_DFS_ROOT_SES(tcon->ses);
|
||||
struct cifs_tcon *ipc = root_ses->tcon_ipc;
|
||||
char *share = NULL, *prefix = NULL;
|
||||
struct dfs_cache_tgt_iterator *tit;
|
||||
bool target_match;
|
||||
@ -403,7 +480,7 @@ static int __tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *t
|
||||
share = prefix = NULL;
|
||||
|
||||
/* Check if share matches with tcp ses */
|
||||
rc = dfs_cache_get_tgt_share(server->current_fullpath + 1, tit, &share, &prefix);
|
||||
rc = dfs_cache_get_tgt_share(server->leaf_fullpath + 1, tit, &share, &prefix);
|
||||
if (rc) {
|
||||
cifs_dbg(VFS, "%s: failed to parse target share: %d\n", __func__, rc);
|
||||
break;
|
||||
@ -417,19 +494,15 @@ static int __tree_connect_dfs_target(const unsigned int xid, struct cifs_tcon *t
|
||||
continue;
|
||||
}
|
||||
|
||||
dfs_cache_noreq_update_tgthint(server->current_fullpath + 1, tit);
|
||||
|
||||
if (ipc->need_reconnect) {
|
||||
scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$", server->hostname);
|
||||
rc = ops->tree_connect(xid, ipc->ses, tree, ipc, cifs_sb->local_nls);
|
||||
cifs_dbg(FYI, "%s: reconnect ipc: %d\n", __func__, rc);
|
||||
}
|
||||
dfs_cache_noreq_update_tgthint(server->leaf_fullpath + 1, tit);
|
||||
tree_connect_ipc(xid, tree, cifs_sb, tcon);
|
||||
|
||||
scnprintf(tree, MAX_TREE_SIZE, "\\%s", share);
|
||||
if (!islink) {
|
||||
rc = ops->tree_connect(xid, tcon->ses, tree, tcon, cifs_sb->local_nls);
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* If no dfs referrals were returned from link target, then just do a TREE_CONNECT
|
||||
* to it. Otherwise, cache the dfs referral and then mark current tcp ses for
|
||||
@ -539,8 +612,8 @@ int cifs_tree_connect(const unsigned int xid, struct cifs_tcon *tcon, const stru
|
||||
cifs_sb = CIFS_SB(sb);
|
||||
|
||||
/* If it is not dfs or there was no cached dfs referral, then reconnect to same share */
|
||||
if (!server->current_fullpath ||
|
||||
dfs_cache_noreq_find(server->current_fullpath + 1, &ref, &tl)) {
|
||||
if (!server->leaf_fullpath ||
|
||||
dfs_cache_noreq_find(server->leaf_fullpath + 1, &ref, &tl)) {
|
||||
rc = ops->tree_connect(xid, tcon->ses, tcon->tree_name, tcon, cifs_sb->local_nls);
|
||||
goto out;
|
||||
}
|
||||
|
||||
@ -43,8 +43,12 @@ static inline char *dfs_get_automount_devname(struct dentry *dentry, void *page)
|
||||
size_t len;
|
||||
char *s;
|
||||
|
||||
if (unlikely(!server->origin_fullpath))
|
||||
spin_lock(&server->srv_lock);
|
||||
if (unlikely(!server->origin_fullpath)) {
|
||||
spin_unlock(&server->srv_lock);
|
||||
return ERR_PTR(-EREMOTE);
|
||||
}
|
||||
spin_unlock(&server->srv_lock);
|
||||
|
||||
s = dentry_path_raw(dentry, page, PATH_MAX);
|
||||
if (IS_ERR(s))
|
||||
@ -53,13 +57,18 @@ static inline char *dfs_get_automount_devname(struct dentry *dentry, void *page)
|
||||
if (!s[1])
|
||||
s++;
|
||||
|
||||
spin_lock(&server->srv_lock);
|
||||
len = strlen(server->origin_fullpath);
|
||||
if (s < (char *)page + len)
|
||||
if (s < (char *)page + len) {
|
||||
spin_unlock(&server->srv_lock);
|
||||
return ERR_PTR(-ENAMETOOLONG);
|
||||
}
|
||||
|
||||
s -= len;
|
||||
memcpy(s, server->origin_fullpath, len);
|
||||
spin_unlock(&server->srv_lock);
|
||||
convert_delimiter(s, '/');
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
|
||||
@ -20,12 +20,14 @@
|
||||
#include "cifs_unicode.h"
|
||||
#include "smb2glob.h"
|
||||
#include "dns_resolve.h"
|
||||
#include "dfs.h"
|
||||
|
||||
#include "dfs_cache.h"
|
||||
|
||||
#define CACHE_HTABLE_SIZE 32
|
||||
#define CACHE_MAX_ENTRIES 64
|
||||
#define CACHE_MIN_TTL 120 /* 2 minutes */
|
||||
#define CACHE_HTABLE_SIZE 32
|
||||
#define CACHE_MAX_ENTRIES 64
|
||||
#define CACHE_MIN_TTL 120 /* 2 minutes */
|
||||
#define CACHE_DEFAULT_TTL 300 /* 5 minutes */
|
||||
|
||||
#define IS_DFS_INTERLINK(v) (((v) & DFSREF_REFERRAL_SERVER) && !((v) & DFSREF_STORAGE_SERVER))
|
||||
|
||||
@ -50,10 +52,9 @@ struct cache_entry {
|
||||
};
|
||||
|
||||
static struct kmem_cache *cache_slab __read_mostly;
|
||||
static struct workqueue_struct *dfscache_wq __read_mostly;
|
||||
struct workqueue_struct *dfscache_wq;
|
||||
|
||||
static int cache_ttl;
|
||||
static DEFINE_SPINLOCK(cache_ttl_lock);
|
||||
atomic_t dfs_cache_ttl;
|
||||
|
||||
static struct nls_table *cache_cp;
|
||||
|
||||
@ -65,10 +66,6 @@ static atomic_t cache_count;
|
||||
static struct hlist_head cache_htable[CACHE_HTABLE_SIZE];
|
||||
static DECLARE_RWSEM(htable_rw_lock);
|
||||
|
||||
static void refresh_cache_worker(struct work_struct *work);
|
||||
|
||||
static DECLARE_DELAYED_WORK(refresh_task, refresh_cache_worker);
|
||||
|
||||
/**
|
||||
* dfs_cache_canonical_path - get a canonical DFS path
|
||||
*
|
||||
@ -290,7 +287,9 @@ int dfs_cache_init(void)
|
||||
int rc;
|
||||
int i;
|
||||
|
||||
dfscache_wq = alloc_workqueue("cifs-dfscache", WQ_FREEZABLE | WQ_UNBOUND, 1);
|
||||
dfscache_wq = alloc_workqueue("cifs-dfscache",
|
||||
WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM,
|
||||
0);
|
||||
if (!dfscache_wq)
|
||||
return -ENOMEM;
|
||||
|
||||
@ -306,6 +305,7 @@ int dfs_cache_init(void)
|
||||
INIT_HLIST_HEAD(&cache_htable[i]);
|
||||
|
||||
atomic_set(&cache_count, 0);
|
||||
atomic_set(&dfs_cache_ttl, CACHE_DEFAULT_TTL);
|
||||
cache_cp = load_nls("utf8");
|
||||
if (!cache_cp)
|
||||
cache_cp = load_nls_default();
|
||||
@ -480,6 +480,7 @@ static struct cache_entry *add_cache_entry_locked(struct dfs_info3_param *refs,
|
||||
int rc;
|
||||
struct cache_entry *ce;
|
||||
unsigned int hash;
|
||||
int ttl;
|
||||
|
||||
WARN_ON(!rwsem_is_locked(&htable_rw_lock));
|
||||
|
||||
@ -496,15 +497,8 @@ static struct cache_entry *add_cache_entry_locked(struct dfs_info3_param *refs,
|
||||
if (IS_ERR(ce))
|
||||
return ce;
|
||||
|
||||
spin_lock(&cache_ttl_lock);
|
||||
if (!cache_ttl) {
|
||||
cache_ttl = ce->ttl;
|
||||
queue_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ);
|
||||
} else {
|
||||
cache_ttl = min_t(int, cache_ttl, ce->ttl);
|
||||
mod_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ);
|
||||
}
|
||||
spin_unlock(&cache_ttl_lock);
|
||||
ttl = min_t(int, atomic_read(&dfs_cache_ttl), ce->ttl);
|
||||
atomic_set(&dfs_cache_ttl, ttl);
|
||||
|
||||
hlist_add_head(&ce->hlist, &cache_htable[hash]);
|
||||
dump_ce(ce);
|
||||
@ -616,7 +610,6 @@ static struct cache_entry *lookup_cache_entry(const char *path)
|
||||
*/
|
||||
void dfs_cache_destroy(void)
|
||||
{
|
||||
cancel_delayed_work_sync(&refresh_task);
|
||||
unload_nls(cache_cp);
|
||||
flush_cache_ents();
|
||||
kmem_cache_destroy(cache_slab);
|
||||
@ -1142,6 +1135,7 @@ static bool target_share_equal(struct TCP_Server_Info *server, const char *s1, c
|
||||
* target shares in @refs.
|
||||
*/
|
||||
static void mark_for_reconnect_if_needed(struct TCP_Server_Info *server,
|
||||
const char *path,
|
||||
struct dfs_cache_tgt_list *old_tl,
|
||||
struct dfs_cache_tgt_list *new_tl)
|
||||
{
|
||||
@ -1153,8 +1147,10 @@ static void mark_for_reconnect_if_needed(struct TCP_Server_Info *server,
|
||||
nit = dfs_cache_get_next_tgt(new_tl, nit)) {
|
||||
if (target_share_equal(server,
|
||||
dfs_cache_get_tgt_name(oit),
|
||||
dfs_cache_get_tgt_name(nit)))
|
||||
dfs_cache_get_tgt_name(nit))) {
|
||||
dfs_cache_noreq_update_tgthint(path, nit);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -1162,13 +1158,28 @@ static void mark_for_reconnect_if_needed(struct TCP_Server_Info *server,
|
||||
cifs_signal_cifsd_for_reconnect(server, true);
|
||||
}
|
||||
|
||||
static bool is_ses_good(struct cifs_ses *ses)
|
||||
{
|
||||
struct TCP_Server_Info *server = ses->server;
|
||||
struct cifs_tcon *tcon = ses->tcon_ipc;
|
||||
bool ret;
|
||||
|
||||
spin_lock(&ses->ses_lock);
|
||||
spin_lock(&ses->chan_lock);
|
||||
ret = !cifs_chan_needs_reconnect(ses, server) &&
|
||||
ses->ses_status == SES_GOOD &&
|
||||
!tcon->need_reconnect;
|
||||
spin_unlock(&ses->chan_lock);
|
||||
spin_unlock(&ses->ses_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Refresh dfs referral of tcon and mark it for reconnect if needed */
|
||||
static int __refresh_tcon(const char *path, struct cifs_tcon *tcon, bool force_refresh)
|
||||
static int __refresh_tcon(const char *path, struct cifs_ses *ses, bool force_refresh)
|
||||
{
|
||||
struct dfs_cache_tgt_list old_tl = DFS_CACHE_TGT_LIST_INIT(old_tl);
|
||||
struct dfs_cache_tgt_list new_tl = DFS_CACHE_TGT_LIST_INIT(new_tl);
|
||||
struct cifs_ses *ses = CIFS_DFS_ROOT_SES(tcon->ses);
|
||||
struct cifs_tcon *ipc = ses->tcon_ipc;
|
||||
struct TCP_Server_Info *server = ses->server;
|
||||
bool needs_refresh = false;
|
||||
struct cache_entry *ce;
|
||||
unsigned int xid;
|
||||
@ -1190,20 +1201,19 @@ static int __refresh_tcon(const char *path, struct cifs_tcon *tcon, bool force_r
|
||||
goto out;
|
||||
}
|
||||
|
||||
spin_lock(&ipc->tc_lock);
|
||||
if (ipc->status != TID_GOOD) {
|
||||
spin_unlock(&ipc->tc_lock);
|
||||
cifs_dbg(FYI, "%s: skip cache refresh due to disconnected ipc\n", __func__);
|
||||
ses = CIFS_DFS_ROOT_SES(ses);
|
||||
if (!is_ses_good(ses)) {
|
||||
cifs_dbg(FYI, "%s: skip cache refresh due to disconnected ipc\n",
|
||||
__func__);
|
||||
goto out;
|
||||
}
|
||||
spin_unlock(&ipc->tc_lock);
|
||||
|
||||
ce = cache_refresh_path(xid, ses, path, true);
|
||||
if (!IS_ERR(ce)) {
|
||||
rc = get_targets(ce, &new_tl);
|
||||
up_read(&htable_rw_lock);
|
||||
cifs_dbg(FYI, "%s: get_targets: %d\n", __func__, rc);
|
||||
mark_for_reconnect_if_needed(tcon->ses->server, &old_tl, &new_tl);
|
||||
mark_for_reconnect_if_needed(server, path, &old_tl, &new_tl);
|
||||
}
|
||||
|
||||
out:
|
||||
@ -1216,10 +1226,11 @@ out:
|
||||
static int refresh_tcon(struct cifs_tcon *tcon, bool force_refresh)
|
||||
{
|
||||
struct TCP_Server_Info *server = tcon->ses->server;
|
||||
struct cifs_ses *ses = tcon->ses;
|
||||
|
||||
mutex_lock(&server->refpath_lock);
|
||||
if (server->leaf_fullpath)
|
||||
__refresh_tcon(server->leaf_fullpath + 1, tcon, force_refresh);
|
||||
__refresh_tcon(server->leaf_fullpath + 1, ses, force_refresh);
|
||||
mutex_unlock(&server->refpath_lock);
|
||||
return 0;
|
||||
}
|
||||
@ -1263,56 +1274,32 @@ int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb)
|
||||
return refresh_tcon(tcon, true);
|
||||
}
|
||||
|
||||
/*
|
||||
* Worker that will refresh DFS cache from all active mounts based on lowest TTL value
|
||||
* from a DFS referral.
|
||||
*/
|
||||
static void refresh_cache_worker(struct work_struct *work)
|
||||
/* Refresh all DFS referrals related to DFS tcon */
|
||||
void dfs_cache_refresh(struct work_struct *work)
|
||||
{
|
||||
struct TCP_Server_Info *server;
|
||||
struct cifs_tcon *tcon, *ntcon;
|
||||
struct list_head tcons;
|
||||
struct dfs_root_ses *rses;
|
||||
struct cifs_tcon *tcon;
|
||||
struct cifs_ses *ses;
|
||||
|
||||
INIT_LIST_HEAD(&tcons);
|
||||
tcon = container_of(work, struct cifs_tcon, dfs_cache_work.work);
|
||||
ses = tcon->ses;
|
||||
server = ses->server;
|
||||
|
||||
spin_lock(&cifs_tcp_ses_lock);
|
||||
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
|
||||
if (!server->leaf_fullpath)
|
||||
continue;
|
||||
|
||||
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
|
||||
if (ses->tcon_ipc) {
|
||||
ses->ses_count++;
|
||||
list_add_tail(&ses->tcon_ipc->ulist, &tcons);
|
||||
}
|
||||
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
|
||||
if (!tcon->ipc) {
|
||||
tcon->tc_count++;
|
||||
list_add_tail(&tcon->ulist, &tcons);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
spin_unlock(&cifs_tcp_ses_lock);
|
||||
|
||||
list_for_each_entry_safe(tcon, ntcon, &tcons, ulist) {
|
||||
struct TCP_Server_Info *server = tcon->ses->server;
|
||||
|
||||
list_del_init(&tcon->ulist);
|
||||
mutex_lock(&server->refpath_lock);
|
||||
if (server->leaf_fullpath)
|
||||
__refresh_tcon(server->leaf_fullpath + 1, ses, false);
|
||||
mutex_unlock(&server->refpath_lock);
|
||||
|
||||
list_for_each_entry(rses, &tcon->dfs_ses_list, list) {
|
||||
ses = rses->ses;
|
||||
server = ses->server;
|
||||
mutex_lock(&server->refpath_lock);
|
||||
if (server->leaf_fullpath)
|
||||
__refresh_tcon(server->leaf_fullpath + 1, tcon, false);
|
||||
__refresh_tcon(server->leaf_fullpath + 1, ses, false);
|
||||
mutex_unlock(&server->refpath_lock);
|
||||
|
||||
if (tcon->ipc)
|
||||
cifs_put_smb_ses(tcon->ses);
|
||||
else
|
||||
cifs_put_tcon(tcon);
|
||||
}
|
||||
|
||||
spin_lock(&cache_ttl_lock);
|
||||
queue_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ);
|
||||
spin_unlock(&cache_ttl_lock);
|
||||
queue_delayed_work(dfscache_wq, &tcon->dfs_cache_work,
|
||||
atomic_read(&dfs_cache_ttl) * HZ);
|
||||
}
|
||||
|
||||
@ -13,6 +13,9 @@
|
||||
#include <linux/uuid.h>
|
||||
#include "cifsglob.h"
|
||||
|
||||
extern struct workqueue_struct *dfscache_wq;
|
||||
extern atomic_t dfs_cache_ttl;
|
||||
|
||||
#define DFS_CACHE_TGT_LIST_INIT(var) { .tl_numtgts = 0, .tl_list = LIST_HEAD_INIT((var).tl_list), }
|
||||
|
||||
struct dfs_cache_tgt_list {
|
||||
@ -42,6 +45,7 @@ int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it,
|
||||
char **prefix);
|
||||
char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap);
|
||||
int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb);
|
||||
void dfs_cache_refresh(struct work_struct *work);
|
||||
|
||||
static inline struct dfs_cache_tgt_iterator *
|
||||
dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
|
||||
@ -89,4 +93,9 @@ dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
|
||||
return tl ? tl->tl_numtgts : 0;
|
||||
}
|
||||
|
||||
static inline int dfs_cache_get_ttl(void)
|
||||
{
|
||||
return atomic_read(&dfs_cache_ttl);
|
||||
}
|
||||
|
||||
#endif /* _CIFS_DFS_CACHE_H */
|
||||
|
||||
@ -239,7 +239,7 @@ static int cifs_dump_full_key(struct cifs_tcon *tcon, struct smb3_full_key_debug
|
||||
* section, we need to make sure it won't be released
|
||||
* so increment its refcount
|
||||
*/
|
||||
ses->ses_count++;
|
||||
cifs_smb_ses_inc_refcount(ses);
|
||||
found = true;
|
||||
goto search_end;
|
||||
}
|
||||
|
||||
@ -159,6 +159,7 @@ cifs_chan_is_iface_active(struct cifs_ses *ses,
|
||||
/* returns number of channels added */
|
||||
int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses)
|
||||
{
|
||||
struct TCP_Server_Info *server = ses->server;
|
||||
int old_chan_count, new_chan_count;
|
||||
int left;
|
||||
int rc = 0;
|
||||
@ -178,16 +179,16 @@ int cifs_try_adding_channels(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses)
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (ses->server->dialect < SMB30_PROT_ID) {
|
||||
if (server->dialect < SMB30_PROT_ID) {
|
||||
spin_unlock(&ses->chan_lock);
|
||||
cifs_dbg(VFS, "multichannel is not supported on this protocol version, use 3.0 or above\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (!(ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
|
||||
if (!(server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
|
||||
ses->chan_max = 1;
|
||||
spin_unlock(&ses->chan_lock);
|
||||
cifs_dbg(VFS, "server %s does not support multichannel\n", ses->server->hostname);
|
||||
cifs_server_dbg(VFS, "no multichannel support\n");
|
||||
return 0;
|
||||
}
|
||||
spin_unlock(&ses->chan_lock);
|
||||
|
||||
@ -175,8 +175,17 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
|
||||
}
|
||||
}
|
||||
spin_unlock(&tcon->tc_lock);
|
||||
if ((!tcon->ses) || (tcon->ses->ses_status == SES_EXITING) ||
|
||||
(!tcon->ses->server) || !server)
|
||||
|
||||
ses = tcon->ses;
|
||||
if (!ses)
|
||||
return -EIO;
|
||||
spin_lock(&ses->ses_lock);
|
||||
if (ses->ses_status == SES_EXITING) {
|
||||
spin_unlock(&ses->ses_lock);
|
||||
return -EIO;
|
||||
}
|
||||
spin_unlock(&ses->ses_lock);
|
||||
if (!ses->server || !server)
|
||||
return -EIO;
|
||||
|
||||
spin_lock(&server->srv_lock);
|
||||
@ -204,8 +213,6 @@ again:
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
ses = tcon->ses;
|
||||
|
||||
spin_lock(&ses->chan_lock);
|
||||
if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) {
|
||||
spin_unlock(&ses->chan_lock);
|
||||
@ -3794,7 +3801,7 @@ void smb2_reconnect_server(struct work_struct *work)
|
||||
if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
|
||||
list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
|
||||
tcon_selected = tcon_exist = true;
|
||||
ses->ses_count++;
|
||||
cifs_smb_ses_inc_refcount(ses);
|
||||
}
|
||||
/*
|
||||
* handle the case where channel needs to reconnect
|
||||
@ -3805,7 +3812,7 @@ void smb2_reconnect_server(struct work_struct *work)
|
||||
if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) {
|
||||
list_add_tail(&ses->rlist, &tmp_ses_list);
|
||||
ses_exist = true;
|
||||
ses->ses_count++;
|
||||
cifs_smb_ses_inc_refcount(ses);
|
||||
}
|
||||
spin_unlock(&ses->chan_lock);
|
||||
}
|
||||
@ -4130,7 +4137,7 @@ smb2_readv_callback(struct mid_q_entry *mid)
|
||||
if (rdata->got_bytes) {
|
||||
rqst.rq_iter = rdata->iter;
|
||||
rqst.rq_iter_size = iov_iter_count(&rdata->iter);
|
||||
};
|
||||
}
|
||||
|
||||
WARN_ONCE(rdata->server != mid->server,
|
||||
"rdata server %p != mid server %p",
|
||||
|
||||
@ -83,22 +83,6 @@ struct create_durable_reconn_v2_req {
|
||||
__le32 Flags;
|
||||
} __packed;
|
||||
|
||||
struct create_app_inst_id {
|
||||
struct create_context ccontext;
|
||||
__u8 Name[8];
|
||||
__u8 Reserved[8];
|
||||
__u8 AppInstanceId[16];
|
||||
} __packed;
|
||||
|
||||
struct create_app_inst_id_vers {
|
||||
struct create_context ccontext;
|
||||
__u8 Name[8];
|
||||
__u8 Reserved[2];
|
||||
__u8 Padding[4];
|
||||
__le64 AppInstanceVersionHigh;
|
||||
__le64 AppInstanceVersionLow;
|
||||
} __packed;
|
||||
|
||||
struct create_alloc_size_req {
|
||||
struct create_context ccontext;
|
||||
__u8 Name[8];
|
||||
|
||||
@ -1250,6 +1250,26 @@ struct create_disk_id_rsp {
|
||||
__u8 Reserved[16];
|
||||
} __packed;
|
||||
|
||||
/* See MS-SMB2 2.2.13.2.13 */
|
||||
struct create_app_inst_id {
|
||||
struct create_context ccontext;
|
||||
__u8 Name[16];
|
||||
__le32 StructureSize; /* Must be 20 */
|
||||
__u16 Reserved;
|
||||
__u8 AppInstanceId[16];
|
||||
} __packed;
|
||||
|
||||
/* See MS-SMB2 2.2.13.2.15 */
|
||||
struct create_app_inst_id_vers {
|
||||
struct create_context ccontext;
|
||||
__u8 Name[16];
|
||||
__le32 StructureSize; /* Must be 24 */
|
||||
__u16 Reserved;
|
||||
__u32 Padding;
|
||||
__le64 AppInstanceVersionHigh;
|
||||
__le64 AppInstanceVersionLow;
|
||||
} __packed;
|
||||
|
||||
/* See MS-SMB2 2.2.31 and 2.2.32 */
|
||||
struct smb2_ioctl_req {
|
||||
struct smb2_hdr hdr;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user