fsnotify: Remove fsnotify_detach_group_marks()
The function is already mostly contained in what
fsnotify_clear_marks_by_group() does. Just update that function to not
select marks when all of them should be destroyed and remove
fsnotify_detach_group_marks().
Reviewed-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 89656ab..9f3364e 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -67,7 +67,7 @@
* - The fs the inode is on is unmounted. (fsnotify_inode_delete/fsnotify_unmount_inodes)
* - Something explicitly requests that it be removed. (fsnotify_destroy_mark)
* - The fsnotify_group associated with the mark is going away and all such marks
- * need to be cleaned up. (fsnotify_detach_group_marks)
+ * need to be cleaned up. (fsnotify_clear_marks_by_group)
*
* This has the very interesting property of being able to run concurrently with
* any (or all) other directions.
@@ -651,7 +651,13 @@
{
struct fsnotify_mark *lmark, *mark;
LIST_HEAD(to_free);
+ struct list_head *head = &to_free;
+ /* Skip selection step if we want to clear all marks. */
+ if (type == FSNOTIFY_OBJ_ALL_TYPES) {
+ head = &group->marks_list;
+ goto clear;
+ }
/*
* We have to be really careful here. Anytime we drop mark_mutex, e.g.
* fsnotify_clear_marks_by_inode() can come and free marks. Even in our
@@ -668,13 +674,14 @@
}
mutex_unlock(&group->mark_mutex);
+clear:
while (1) {
mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING);
- if (list_empty(&to_free)) {
+ if (list_empty(head)) {
mutex_unlock(&group->mark_mutex);
break;
}
- mark = list_first_entry(&to_free, struct fsnotify_mark, g_list);
+ mark = list_first_entry(head, struct fsnotify_mark, g_list);
fsnotify_get_mark(mark);
fsnotify_detach_mark(mark);
mutex_unlock(&group->mark_mutex);
@@ -683,38 +690,6 @@
}
}
-/*
- * Given a group, prepare for freeing all the marks associated with that group.
- * The marks are attached to the list of marks prepared for destruction, the
- * caller is responsible for freeing marks in that list after SRCU period has
- * ended.
- */
-void fsnotify_detach_group_marks(struct fsnotify_group *group)
-{
- struct fsnotify_mark *mark;
-
- while (1) {
- mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING);
- if (list_empty(&group->marks_list)) {
- mutex_unlock(&group->mark_mutex);
- break;
- }
- mark = list_first_entry(&group->marks_list,
- struct fsnotify_mark, g_list);
- fsnotify_get_mark(mark);
- fsnotify_detach_mark(mark);
- mutex_unlock(&group->mark_mutex);
- fsnotify_free_mark(mark);
- fsnotify_put_mark(mark);
- }
- /*
- * Some marks can still be pinned when waiting for response from
- * userspace. Wait for those now. fsnotify_prepare_user_wait() will
- * not succeed now so this wait is race-free.
- */
- wait_event(group->notification_waitq, !atomic_read(&group->user_waits));
-}
-
/* Destroy all marks attached to inode / vfsmount */
void fsnotify_destroy_marks(struct fsnotify_mark_connector __rcu **connp)
{