Commit 04242ff3 authored Feb 11, 2019 by Yan, Zheng Committed by Ilya Dryomov Feb 18, 2019

ceph: avoid repeatedly adding inode to mdsc->snap_flush_list



Otherwise, mdsc->snap_flush_list may get corrupted.

Cc: stable@vger.kernel.org
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

parent 0fd3fd0a

fs/ceph/snap.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -616,6 +616,7 @@ int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
		capsnap->size);

		spin_lock(&mdsc->snap_flush_lock);
		if (list_empty(&ci->i_snap_flush_item))
		list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list);
		spin_unlock(&mdsc->snap_flush_lock);
		return 1; /* caller may want to ceph_flush_snaps */