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>
diff --git a/fs/notify/fsnotify.h b/fs/notify/fsnotify.h
index 83b8ec0..4dc2408 100644
--- a/fs/notify/fsnotify.h
+++ b/fs/notify/fsnotify.h
@@ -13,8 +13,12 @@
/* all bitwise OR of all event types (FS_*) for all fsnotify_groups */
extern __u32 fsnotify_mask;
+/* destroy all events sitting in this groups notification queue */
+extern void fsnotify_flush_notify(struct fsnotify_group *group);
+
/* final kfree of a group */
extern void fsnotify_final_destroy_group(struct fsnotify_group *group);
+
/* run the list of all marks associated with inode and flag them to be freed */
extern void fsnotify_clear_marks_by_inode(struct inode *inode);
/*
@@ -22,4 +26,9 @@
* about events that happen to its children.
*/
extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
+
+/* allocate and destroy and event holder to attach events to notification/access queues */
+extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
+extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
+
#endif /* __FS_NOTIFY_FSNOTIFY_H_ */