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fsnotify: introduce fsnotify_get_group()

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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>
This commit is contained in:
Lino Sanfilippo 2011-06-14 17:29:46 +02:00 committed by Eric Paris
parent d8153d4d8b
commit 9861295204
2 changed files with 11 additions and 1 deletions
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8
fs/notify/group.c
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@ -62,6 +62,14 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
fsnotify_final_destroy_group(group); fsnotify_final_destroy_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. * Drop a reference to a group. Free it if it's through.
*/ */

4
include/linux/fsnotify_backend.h
View File

@ -360,8 +360,10 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
/* called from fsnotify listeners, such as fanotify or dnotify */ /* 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); 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 */ /* drop reference on a group from fsnotify_alloc_group */
extern void fsnotify_put_group(struct fsnotify_group *group); extern void fsnotify_put_group(struct fsnotify_group *group);
/* destroy group */ /* destroy group */