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From: "Yan, Zheng" <zyan@redhat.com>
To: ceph-devel@vger.kernel.org, jlayton@redhat.com, idryomov@gmail.com
Cc: "Yan, Zheng" <zyan@redhat.com>
Subject: [PATCH 02/13] ceph: fix message order check in handle_cap_export()
Date: Mon,  4 Sep 2017 17:38:57 +0800	[thread overview]
Message-ID: <20170904093908.57316-3-zyan@redhat.com> (raw)
In-Reply-To: <20170904093908.57316-1-zyan@redhat.com>

If caps for importer mds exists, but cap id mismatch, client should
have received corresponding import message. Because cap ID does not
change as long as client holds the caps.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
---
 fs/ceph/caps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 5daf86621871..7a7945032802 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3427,7 +3427,7 @@ static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex,
 	tcap = __get_cap_for_mds(ci, target);
 	if (tcap) {
 		/* already have caps from the target */
-		if (tcap->cap_id != t_cap_id ||
+		if (tcap->cap_id == t_cap_id &&
 		    ceph_seq_cmp(tcap->seq, t_seq) < 0) {
 			dout(" updating import cap %p mds%d\n", tcap, target);
 			tcap->cap_id = t_cap_id;
-- 
2.13.5


  parent reply	other threads:[~2017-09-04  9:39 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-04  9:38 [PATCH 00/13] ceph: snapshot and multimds fixes Yan, Zheng
2017-09-04  9:38 ` [PATCH 01/13] ceph: fix null pointer dereference in ceph_flush_snaps() Yan, Zheng
2017-09-04  9:38 ` Yan, Zheng [this message]
2017-09-04  9:38 ` [PATCH 03/13] ceph: handle race between vmtruncate and queuing cap snap Yan, Zheng
2017-09-04  9:38 ` [PATCH 04/13] ceph: queue cap snap only when snap realm's context changes Yan, Zheng
2017-09-04  9:39 ` [PATCH 05/13] ceph: remove stale check in ceph_invalidatepage() Yan, Zheng
2017-09-04  9:39 ` [PATCH 06/13] ceph: properly get capsnap's size in get_oldest_context() Yan, Zheng
2017-09-04  9:39 ` [PATCH 07/13] ceph: make writepage_nounlock() invalidate page that beyonds EOF Yan, Zheng
2017-09-04  9:39 ` [PATCH 08/13] ceph: optimize pagevec iterating in ceph_writepages_start() Yan, Zheng
2017-09-04  9:39 ` [PATCH 09/13] ceph: cleanup local varibles " Yan, Zheng
2017-09-04  9:39 ` [PATCH 10/13] ceph: fix "range cyclic" mode writepages Yan, Zheng
2017-09-04  9:39 ` [PATCH 11/13] ceph: ignore wbc->range_{start,end} when write back snapshot data Yan, Zheng
2017-09-04  9:39 ` [PATCH 12/13] ceph: fix capsnap dirty pages accounting Yan, Zheng
2017-09-04  9:39 ` [PATCH 13/13] ceph: wait on writeback after writing snapshot data Yan, Zheng

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