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authorEric Paris <eparis@redhat.com>2009-05-21 17:01:37 -0400
committerEric Paris <eparis@redhat.com>2009-06-11 14:57:53 -0400
commita2d8bc6cb4a3024661baf877242f123787d0c054 (patch)
tree4ff3f93877a8992d5383c14fb6012ab9b1954660 /fs/notify/group.c
parent3c5119c05d624f95f4967d16b38c9624b816bdb9 (diff)
fsnotify: generic notification queue and waitq
inotify needs to do asyc notification in which event information is stored on a queue until the listener is ready to receive it. This patch implements a generic notification queue for inotify (and later fanotify) to store events to be sent at a later time. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/notify/group.c')
-rw-r--r--fs/notify/group.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/notify/group.c b/fs/notify/group.c
index a29d2fa6792..0e1677144bc 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -91,6 +91,9 @@ static void fsnotify_get_group(struct fsnotify_group *group)
*/
void fsnotify_final_destroy_group(struct fsnotify_group *group)
{
+ /* clear the notification queue of all events */
+ fsnotify_flush_notify(group);
+
if (group->ops->free_group_priv)
group->ops->free_group_priv(group);
@@ -214,6 +217,12 @@ struct fsnotify_group *fsnotify_obtain_group(unsigned int group_num, __u32 mask,
group->group_num = group_num;
group->mask = mask;
+ mutex_init(&group->notification_mutex);
+ INIT_LIST_HEAD(&group->notification_list);
+ init_waitqueue_head(&group->notification_waitq);
+ group->q_len = 0;
+ group->max_events = UINT_MAX;
+
spin_lock_init(&group->mark_lock);
atomic_set(&group->num_marks, 0);
INIT_LIST_HEAD(&group->mark_entries);