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| author | Amir Goldstein <amir73il@gmail.com> | 2024-03-17 21:41:51 +0300 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2024-04-04 17:24:16 +0300 |
| commit | 07a3b8d0bf726a1e49b050bbc6bd72f031e505fe (patch) | |
| tree | 45d9153d780282b0d4f2999811a9d210b63e1d62 /include/linux | |
| parent | c9d4603b054f9a63c07c7012040af4c80adb2c60 (diff) | |
| download | linux-07a3b8d0bf726a1e49b050bbc6bd72f031e505fe.tar.xz | |
fsnotify: lazy attach fsnotify_sb_info state to sb
Define a container struct fsnotify_sb_info to hold per-sb state,
including the reference to sb marks connector.
Allocate the fsnotify_sb_info state before attaching connector to any
object on the sb and free it only when killing sb.
This state is going to be used for storing per priority watched objects
counters.
Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20240317184154.1200192-8-amir73il@gmail.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 8 | ||||
| -rw-r--r-- | include/linux/fsnotify_backend.h | 17 |
2 files changed, 21 insertions, 4 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 00fc429b0af0..7f40b592f711 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -73,6 +73,8 @@ struct fscrypt_inode_info; struct fscrypt_operations; struct fsverity_info; struct fsverity_operations; +struct fsnotify_mark_connector; +struct fsnotify_sb_info; struct fs_context; struct fs_parameter_spec; struct fileattr; @@ -620,8 +622,6 @@ is_uncached_acl(struct posix_acl *acl) #define IOP_XATTR 0x0008 #define IOP_DEFAULT_READLINK 0x0010 -struct fsnotify_mark_connector; - /* * Keep mostly read-only and often accessed (especially for * the RCU path lookup and 'stat' data) fields at the beginning @@ -1249,7 +1249,7 @@ struct super_block { /* * Keep s_fs_info, s_time_gran, s_fsnotify_mask, and - * s_fsnotify_marks together for cache efficiency. They are frequently + * s_fsnotify_info together for cache efficiency. They are frequently * accessed and rarely modified. */ void *s_fs_info; /* Filesystem private info */ @@ -1261,7 +1261,7 @@ struct super_block { time64_t s_time_max; #ifdef CONFIG_FSNOTIFY __u32 s_fsnotify_mask; - struct fsnotify_mark_connector __rcu *s_fsnotify_marks; + struct fsnotify_sb_info *s_fsnotify_info; #endif /* diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index 83004d9e07a3..c9f2b2f6b493 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -477,6 +477,23 @@ struct fsnotify_mark_connector { struct hlist_head list; }; +/* + * Container for per-sb fsnotify state (sb marks and more). + * Attached lazily on first marked object on the sb and freed when killing sb. + */ +struct fsnotify_sb_info { + struct fsnotify_mark_connector __rcu *sb_marks; +}; + +static inline struct fsnotify_sb_info *fsnotify_sb_info(struct super_block *sb) +{ +#ifdef CONFIG_FSNOTIFY + return READ_ONCE(sb->s_fsnotify_info); +#else + return NULL; +#endif +} + static inline atomic_long_t *fsnotify_sb_watched_objects(struct super_block *sb) { return &sb->s_fsnotify_connectors; |