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authorEric Paris <eparis@redhat.com>2010-07-28 10:18:37 -0400
committerEric Paris <eparis@redhat.com>2010-07-28 10:18:50 -0400
commitf70ab54cc6c3907b0727ba332b3976f80f3846d0 (patch)
tree2a22097325a668a0d08d4ea3354d0e6c95fddd86 /fs/notify/notification.c
parent5ba08e2eeb06355f66ed62ae97bb87d145973a9a (diff)
downloadlinux-linaro-stable-f70ab54cc6c3907b0727ba332b3976f80f3846d0.tar.gz
fsnotify: fsnotify_add_notify_event should return an event
Rather than the horrific void ** argument and such just to pass the fanotify_merge event back to the caller of fsnotify_add_notify_event() have those things return an event if it was different than the event suggusted to be added. Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs/notify/notification.c')
-rw-r--r--fs/notify/notification.c42
1 files changed, 28 insertions, 14 deletions
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index e6dde25fb99b..f39260f8f865 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -137,16 +137,14 @@ struct fsnotify_event_private_data *fsnotify_remove_priv_from_event(struct fsnot
* event off the queue to deal with. If the event is successfully added to the
* group's notification queue, a reference is taken on event.
*/
-int fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_event *event,
- struct fsnotify_event_private_data *priv,
- int (*merge)(struct list_head *,
- struct fsnotify_event *,
- void **arg),
- void **arg)
+struct fsnotify_event *fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_event *event,
+ struct fsnotify_event_private_data *priv,
+ struct fsnotify_event *(*merge)(struct list_head *,
+ struct fsnotify_event *))
{
+ struct fsnotify_event *return_event = NULL;
struct fsnotify_event_holder *holder = NULL;
struct list_head *list = &group->notification_list;
- int rc = 0;
pr_debug("%s: group=%p event=%p priv=%p\n", __func__, group, event, priv);
@@ -162,27 +160,37 @@ int fsnotify_add_notify_event(struct fsnotify_group *group, struct fsnotify_even
alloc_holder:
holder = fsnotify_alloc_event_holder();
if (!holder)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
mutex_lock(&group->notification_mutex);
if (group->q_len >= group->max_events) {
event = q_overflow_event;
- rc = -EOVERFLOW;
+
+ /*
+ * we need to return the overflow event
+ * which means we need a ref
+ */
+ fsnotify_get_event(event);
+ return_event = event;
+
/* sorry, no private data on the overflow event */
priv = NULL;
}
if (!list_empty(list) && merge) {
- int ret;
+ struct fsnotify_event *tmp;
- ret = merge(list, event, arg);
- if (ret) {
+ tmp = merge(list, event);
+ if (tmp) {
mutex_unlock(&group->notification_mutex);
+
+ if (return_event)
+ fsnotify_put_event(return_event);
if (holder != &event->holder)
fsnotify_destroy_event_holder(holder);
- return ret;
+ return tmp;
}
}
@@ -197,6 +205,12 @@ alloc_holder:
* event holder was used, go back and get a new one */
spin_unlock(&event->lock);
mutex_unlock(&group->notification_mutex);
+
+ if (return_event) {
+ fsnotify_put_event(return_event);
+ return_event = NULL;
+ }
+
goto alloc_holder;
}
@@ -211,7 +225,7 @@ alloc_holder:
mutex_unlock(&group->notification_mutex);
wake_up(&group->notification_waitq);
- return rc;
+ return return_event;
}
/*