On Wed, Jun 16, 2021 at 2:56 AM Gabriel Krisman Bertazi
<krisman@xxxxxxxxxxxxx> wrote:
>
> Similarly to fanotify_is_perm_event and friends, provide a helper
> predicate to say whether a mask is of an overflow event.
>
> Suggested-by: Amir Goldstein <amir73il@xxxxxxxxx>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
> ---
Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx>
Thanks!
> fs/notify/fanotify/fanotify.h | 3 ++-
> include/linux/fsnotify_backend.h | 5 +++++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h
> index aec05e21d5a9..7e00c05a979a 100644
> --- a/fs/notify/fanotify/fanotify.h
> +++ b/fs/notify/fanotify/fanotify.h
> @@ -326,7 +326,8 @@ static inline struct path *fanotify_event_path(struct fanotify_event *event)
> */
> 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(
> diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
> index c4473b467c28..f9e2c6cd0f7d 100644
> --- a/include/linux/fsnotify_backend.h
> +++ b/include/linux/fsnotify_backend.h
> @@ -495,6 +495,11 @@ static inline void fsnotify_queue_overflow(struct fsnotify_group *group)
> 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)
> {
> assert_spin_locked(&group->notification_lock);
> --
> 2.31.0
>
