In fanotify_group_event_mask() there is logic in place to make sure we
are not going to handle an event with no type and just FAN_ONDIR flag.
Generalize this logic to any FANOTIFY_EVENT_FLAGS.
There is only one more flag in this group at the moment -
FAN_EVENT_ON_CHILD. We never report it to user, but we do pass it in to
fanotify_alloc_event() when group is reporting fid as indication that
event happened on child. We will have use for this indication later on.
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
fs/notify/fanotify/fanotify.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index e6ba605732d7..110835a9bf99 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -211,7 +211,8 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
int data_type)
{
__u32 marks_mask = 0, marks_ignored_mask = 0;
- __u32 test_mask, user_mask = FANOTIFY_OUTGOING_EVENTS;
+ __u32 test_mask, user_mask = FANOTIFY_OUTGOING_EVENTS |
+ FANOTIFY_EVENT_FLAGS;
const struct path *path = fsnotify_data_path(data, data_type);
struct fsnotify_mark *mark;
int type;
@@ -264,14 +265,18 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
*
* For backward compatibility and consistency, do not report FAN_ONDIR
* to user in legacy fanotify mode (reporting fd) and report FAN_ONDIR
- * to user in FAN_REPORT_FID mode for all event types.
+ * to user in fid mode for all event types.
+ *
+ * We never report FAN_EVENT_ON_CHILD to user, but we do pass it in to
+ * fanotify_alloc_event() when group is reporting fid as indication
+ * that event happened on child.
*/
if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
- /* Do not report FAN_ONDIR without any event */
- if (!(test_mask & ~FAN_ONDIR))
+ /* Do not report event flags without any event */
+ if (!(test_mask & ~FANOTIFY_EVENT_FLAGS))
return 0;
} else {
- user_mask &= ~FAN_ONDIR;
+ user_mask &= ~FANOTIFY_EVENT_FLAGS;
}
return test_mask & user_mask;
--
2.17.1
