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fsnotify: Add helper to detect overflow_event

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[ Upstream commit 808967a0a4d2f4ce6a2005c5692fffbecaf018c1 ]

Similarly to fanotify_is_perm_event and friends, provide a helper
predicate to say whether a mask is of an overflow event.

Link: https://lore.kernel.org/r/20211025192746.66445-9-krisman@collabora.com
Suggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gabriel Krisman Bertazi
2021-10-25 16:27:23 -03:00
committed by Greg Kroah-Hartman
parent 7c9ba74cb3
commit 24eda1b5e6
2 changed files with 7 additions and 1 deletions
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3
fs/notify/fanotify/fanotify.h
View File

@@ -315,7 +315,8 @@ static inline struct path *fanotify_event_path(struct fanotify_event *event)
*/ */
static inline bool fanotify_is_hashed_event(u32 mask) static inline bool fanotify_is_hashed_event(u32 mask)
{ {
return !fanotify_is_perm_event(mask) && !(mask & FS_Q_OVERFLOW); return !(fanotify_is_perm_event(mask) ||
fsnotify_is_overflow_event(mask));
} }
static inline unsigned int fanotify_event_hash_bucket( static inline unsigned int fanotify_event_hash_bucket(

5
include/linux/fsnotify_backend.h
View File

@@ -510,6 +510,11 @@ static inline void fsnotify_queue_overflow(struct fsnotify_group *group)
fsnotify_add_event(group, group->overflow_event, NULL, NULL); fsnotify_add_event(group, group->overflow_event, NULL, NULL);
} }
static inline bool fsnotify_is_overflow_event(u32 mask)
{
return mask & FS_Q_OVERFLOW;
}
static inline bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group) static inline bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group)
{ {
assert_spin_locked(&group->notification_lock); assert_spin_locked(&group->notification_lock);