Introduce fsnotify_get_group() which increments the reference counter of a group.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@xxxxxx>
---
fs/notify/group.c | 8 ++++++++
include/linux/fsnotify_backend.h | 4 +++-
2 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/fs/notify/group.c b/fs/notify/group.c
index 5e638a2..0fd8f5e 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 877764a..073b72b 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 */
--
1.5.6.5
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