diff options
| author | Jan Kara <jack@suse.cz> | 2019-01-08 14:02:44 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2019-02-18 12:41:16 +0100 |
| commit | 40873284d7106fc0f0f4d2deae74b38fb18342cc (patch) | |
| tree | 5d3965765a3d031321b026e576db2593242b77e0 /fs/notify/fanotify/fanotify.h | |
| parent | ca6f86998d810d4a9fe172bf4cb6d3353636881f (diff) | |
fanotify: Track permission event state
Track whether permission event got already reported to userspace and
whether userspace already answered to the permission event. Protect
stores to this field together with updates to ->response field by
group->notification_lock. This will allow aborting wait for reply to
permission event from userspace.
Reviewed-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 | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h index e84d68c6840a..480f281996d4 100644 --- a/fs/notify/fanotify/fanotify.h +++ b/fs/notify/fanotify/fanotify.h @@ -8,6 +8,13 @@ extern struct kmem_cache *fanotify_mark_cache; extern struct kmem_cache *fanotify_event_cachep; extern struct kmem_cache *fanotify_perm_event_cachep; +/* Possible states of the permission event */ +enum { + FAN_EVENT_INIT, + FAN_EVENT_REPORTED, + FAN_EVENT_ANSWERED +}; + /* * 3 dwords are sufficient for most local fs (64bit ino, 32bit generation). * For 32bit arch, fid increases the size of fanotify_event by 12 bytes and @@ -109,7 +116,8 @@ static inline void *fanotify_event_fh(struct fanotify_event *event) */ struct fanotify_perm_event { struct fanotify_event fae; - int response; /* userspace answer to question */ + unsigned short response; /* userspace answer to the event */ + unsigned short state; /* state of the event */ int fd; /* fd we passed to userspace for this event */ }; |