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authorLino Sanfilippo <LinoSanfilippo@gmx.de>2011-06-14 17:29:46 +0200
committerEric Paris <eparis@redhat.com>2012-12-11 13:29:44 -0500
commit986129520479d689962a42c31acdeaf854ac91f5 (patch)
tree0054f75371764fc0a5cc0d194ea7f85e8b94f9d8
parentd8153d4d8b7b6141770e1416c4a338161205ed1b (diff)
downloadlinux-986129520479d689962a42c31acdeaf854ac91f5.tar.bz2
fsnotify: introduce fsnotify_get_group()
Introduce fsnotify_get_group() which increments the reference counter of a group. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Signed-off-by: Eric Paris <eparis@redhat.com>
-rw-r--r--fs/notify/group.c8
-rw-r--r--include/linux/fsnotify_backend.h4
2 files changed, 11 insertions, 1 deletions
diff --git a/fs/notify/group.c b/fs/notify/group.c
index cfda328c3d11..1d57c35f1043 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -63,6 +63,14 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
}
/*
+ * Get reference to a group.
+ */
+void fsnotify_get_group(struct fsnotify_group *group)
+{
+ atomic_inc(&group->refcnt);
+}
+
+/*
* Drop a reference to a group. Free it if it's through.
*/
void fsnotify_put_group(struct fsnotify_group *group)
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index d2ad345bdeec..e76cef75295d 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -360,8 +360,10 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
/* called from fsnotify listeners, such as fanotify or dnotify */
-/* get a reference to an existing or create a new group */
+/* create a new group */
extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
+/* get reference to a group */
+extern void fsnotify_get_group(struct fsnotify_group *group);
/* drop reference on a group from fsnotify_alloc_group */
extern void fsnotify_put_group(struct fsnotify_group *group);
/* destroy group */