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Commit 79e3959b authored by Yan, Zheng's avatar Yan, Zheng Committed by Greg Kroah-Hartman
Browse files

ceph: avoid repeatedly adding inode to mdsc->snap_flush_list 



commit 04242ff3ac0abbaa4362f97781dac268e6c3541a upstream.

Otherwise, mdsc->snap_flush_list may get corrupted.

Cc: stable@vger.kernel.org
Signed-off-by: default avatar"Yan, Zheng" <zyan@redhat.com>
Reviewed-by: default avatarIlya Dryomov <idryomov@gmail.com>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a1f11de4

fs/ceph/snap.c

+2 −1
Original line number Diff line number Diff line
@@ -609,6 +609,7 @@ 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 */