fanotify: Drop fanotify_event_has_fid()

When some events have directory id and some object id,
fanotify_event_has_fid() becomes mostly useless and confusing because we
usually need to know which type of file handle the event has. So just
drop the function and use fanotify_event_object_fh() instead.
Signed-off-by: Jan Kara <jack@suse.cz>

fs/notify/fanotify/fanotify.c

@@ -387,7 +387,7 @@ init: __maybe_unused
 	else
 		event->pid = get_pid(task_tgid(current));
 
-	if (fanotify_event_has_fid(event)) {
+	if (fanotify_event_object_fh(event)) {
 		ffe->object_fh.len = 0;
 		if (fsid)
 			ffe->fsid = *fsid;

fs/notify/fanotify/fanotify.h

@@ -83,11 +83,6 @@ FANOTIFY_FE(struct fanotify_event *event)
 	return container_of(event, struct fanotify_fid_event, fae);
 }
 
-static inline bool fanotify_event_has_fid(struct fanotify_event *event)
-{
-	return event->type == FANOTIFY_EVENT_TYPE_FID;
-}
-
 static inline __kernel_fsid_t *fanotify_event_fsid(struct fanotify_event *event)
 {
 	if (event->type == FANOTIFY_EVENT_TYPE_FID)

fs/notify/fanotify/fanotify_user.c

@@ -275,7 +275,7 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
 	metadata.mask = event->mask & FANOTIFY_OUTGOING_EVENTS;
 	metadata.pid = pid_vnr(event->pid);
 
-	if (fanotify_event_has_fid(event)) {
+	if (fanotify_event_object_fh(event)) {
 		metadata.event_len += fanotify_event_info_len(event);
 	} else if (path && path->mnt && path->dentry) {
 		fd = create_fd(group, path, &f);
@@ -300,7 +300,7 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
 
 	if (f) {
 		fd_install(fd, f);
-	} else if (fanotify_event_has_fid(event)) {
+	} else if (fanotify_event_object_fh(event)) {
 		ret = copy_fid_to_user(fanotify_event_fsid(event),
 				       fanotify_event_object_fh(event),
 				       buf + FAN_EVENT_METADATA_LEN);