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| author | Paulo Alcantara <pc@manguebit.com> | 2023-04-27 09:40:08 +0200 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2023-05-04 06:29:47 +0200 |
| commit | 6be2ea33a4093402252724a00c4af8033725184c (patch) | |
| tree | 79c111db007aed6fab0cb82837480909e17eaabb /fs/cifs/dfs_cache.h | |
| parent | cifs: protect access of TCP_Server_Info::{origin,leaf}_fullpath (diff) | |
| download | linux-6be2ea33a4093402252724a00c4af8033725184c.tar.xz linux-6be2ea33a4093402252724a00c4af8033725184c.zip | |
cifs: avoid potential races when handling multiple dfs tcons
Now that a DFS tcon manages its own list of DFS referrals and
sessions, there is no point in having a single worker to refresh
referrals of all DFS tcons. Make it faster and less prone to race
conditions when having several mounts by queueing a worker per DFS
tcon that will take care of refreshing only the DFS referrals related
to it.
Cc: stable@vger.kernel.org # v6.2+
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/dfs_cache.h')
| -rw-r--r-- | fs/cifs/dfs_cache.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/cifs/dfs_cache.h b/fs/cifs/dfs_cache.h index e0d39393035a..c6d89cd6d4fd 100644 --- a/fs/cifs/dfs_cache.h +++ b/fs/cifs/dfs_cache.h @@ -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 */ |