inotify, fanotify: replace fsnotify_put_group() with fsnotify_destroy_group()
Currently in fsnotify_put_group() the ref count of a group is decremented and if
it becomes 0 fsnotify_destroy_group() is called. Since a groups ref count is only
at group creation set to 1 and never increased after that a call to fsnotify_put_group()
always results in a call to fsnotify_destroy_group().
With this patch fsnotify_destroy_group() is called directly.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index d438036..82ae6d7 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -415,7 +415,7 @@
wake_up(&group->fanotify_data.access_waitq);
#endif
/* matches the fanotify_init->fsnotify_alloc_group */
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return 0;
}
@@ -728,13 +728,13 @@
break;
default:
fd = -EINVAL;
- goto out_put_group;
+ goto out_destroy_group;
}
if (flags & FAN_UNLIMITED_QUEUE) {
fd = -EPERM;
if (!capable(CAP_SYS_ADMIN))
- goto out_put_group;
+ goto out_destroy_group;
group->max_events = UINT_MAX;
} else {
group->max_events = FANOTIFY_DEFAULT_MAX_EVENTS;
@@ -743,7 +743,7 @@
if (flags & FAN_UNLIMITED_MARKS) {
fd = -EPERM;
if (!capable(CAP_SYS_ADMIN))
- goto out_put_group;
+ goto out_destroy_group;
group->fanotify_data.max_marks = UINT_MAX;
} else {
group->fanotify_data.max_marks = FANOTIFY_DEFAULT_MAX_MARKS;
@@ -751,12 +751,12 @@
fd = anon_inode_getfd("[fanotify]", &fanotify_fops, group, f_flags);
if (fd < 0)
- goto out_put_group;
+ goto out_destroy_group;
return fd;
-out_put_group:
- fsnotify_put_group(group);
+out_destroy_group:
+ fsnotify_destroy_group(group);
return fd;
}
diff --git a/fs/notify/group.c b/fs/notify/group.c
index 63fc294..cfda328 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -50,7 +50,7 @@
* situtation, the fsnotify_final_destroy_group will get called when that final
* mark is freed.
*/
-static void fsnotify_destroy_group(struct fsnotify_group *group)
+void fsnotify_destroy_group(struct fsnotify_group *group)
{
/* clear all inode marks for this group */
fsnotify_clear_marks_by_group(group);
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 8445fbc..dbafbfc 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -293,10 +293,8 @@
pr_debug("%s: group=%p\n", __func__, group);
- fsnotify_clear_marks_by_group(group);
-
/* free this group, matching get was inotify_init->fsnotify_obtain_group */
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return 0;
}
@@ -712,7 +710,7 @@
if (atomic_inc_return(&group->inotify_data.user->inotify_devs) >
inotify_max_user_instances) {
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return ERR_PTR(-EMFILE);
}
@@ -741,7 +739,7 @@
ret = anon_inode_getfd("inotify", &inotify_fops, group,
O_RDONLY | flags);
if (ret < 0)
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return ret;
}