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| author | Amir Goldstein <amir73il@gmail.com> | 2019-01-10 19:04:37 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2019-02-07 16:38:35 +0100 |
| commit | 77115225acc67d9ac4b15f04dd138006b9cd1ef2 (patch) | |
| tree | 6f5bce4240d6975c10ffee2d447035b1783b0e38 /fs/notify/fanotify/fanotify.h | |
| parent | a8b13aa20afb69161b5123b4f1acc7ea0a03d360 (diff) | |
| download | linux-77115225acc67d9ac4b15f04dd138006b9cd1ef2.tar.bz2 | |
fanotify: cache fsid in fsnotify_mark_connector
For FAN_REPORT_FID, we need to encode fid with fsid of the filesystem on
every event. To avoid having to call vfs_statfs() on every event to get
fsid, we store the fsid in fsnotify_mark_connector on the first time we
add a mark and on handle event we use the cached fsid.
Subsequent calls to add mark on the same object are expected to pass the
same fsid, so the call will fail on cached fsid mismatch.
If an event is reported on several mark types (inode, mount, filesystem),
all connectors should already have the same fsid, so we use the cached
fsid from the first connector.
[JK: Simplify code flow around fanotify_get_fid()
make fsid argument of fsnotify_add_mark_locked() unconditional]
Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/fanotify/fanotify.h')
| -rw-r--r-- | fs/notify/fanotify/fanotify.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h index 4aafc7144c3d..5b072afa4e19 100644 --- a/fs/notify/fanotify/fanotify.h +++ b/fs/notify/fanotify/fanotify.h @@ -131,5 +131,6 @@ static inline struct fanotify_event *FANOTIFY_E(struct fsnotify_event *fse) } struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group, - struct inode *inode, u32 mask, - const struct path *path); + struct inode *inode, u32 mask, + const struct path *path, + __kernel_fsid_t *fsid); |