Commit ca665e02 authored Apr 21, 2014 by Yan, Zheng

mds: check cap ID when handling cap export message



handle following sequence of events:
- mds0 exports an inode to mds1. client receives the cap import
  message from mds1. caps from mds0 are removed while handling
  the cap import message.
- mds1 exports an inode to mds0. client receives the cap export
  message from mds1. handle_cap_export() adds placeholder caps
  for mds0
- client receives the first cap export message (for exporting
  inode from mds0 to mds1)

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>

parent 8d08503c

fs/ceph/caps.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2805,7 +2805,7 @@ static void handle_cap_export(struct inode inode, struct ceph_mds_caps ex,
		retry:
		spin_lock(&ci->i_ceph_lock);
		cap = __get_cap_for_mds(ci, mds);
		if (!cap)
		if (!cap \|\| cap->cap_id != le64_to_cpu(ex->cap_id))
		goto out_unlock;

		if (target < 0) {

Admin message