Commit b8c2f3ae authored by Yan, Zheng's avatar Yan, Zheng Committed by Sage Weil
Browse files

ceph: check migrate seq before changing auth cap 



We may receive old request reply from the exporter MDS after receiving
the importer MDS' cap import message.

Signed-off-by: default avatarYan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: default avatarSage Weil <sage@inktank.com>
parent fc2744aa

fs/ceph/caps.c

+5 −3
Original line number Diff line number Diff line
@@ -612,9 +612,11 @@ int ceph_add_cap(struct inode *inode, 
		__cap_delay_requeue(mdsc, ci);

	}



	if (flags & CEPH_CAP_FLAG_AUTH)

	if (flags & CEPH_CAP_FLAG_AUTH) {

		if (ci->i_auth_cap == NULL ||

		    ceph_seq_cmp(ci->i_auth_cap->mseq, mseq) < 0)

			ci->i_auth_cap = cap;

	else if (ci->i_auth_cap == cap) {

	} else if (ci->i_auth_cap == cap) {

		ci->i_auth_cap = NULL;

		spin_lock(&mdsc->cap_dirty_lock);

		if (!list_empty(&ci->i_dirty_item)) {