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authorYan, Zheng <zheng.z.yan@intel.com>2013-05-31 12:37:11 +0400
committerSage Weil <sage@inktank.com>2013-07-04 02:32:48 +0400
commitb8c2f3ae2d9f2b975a0e1a9c5652829ef8a4f06c (patch)
tree8b96ef32548d08a4829f001ec0be4d80c0abdd6d /fs/ceph
parentfc2744aa12da7182509b1059aa3ab53754d0c83a (diff)
downloadlinux-b8c2f3ae2d9f2b975a0e1a9c5652829ef8a4f06c.tar.xz
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: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/caps.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 54c290b083ab..790f88b15daf 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -612,9 +612,11 @@ retry:
__cap_delay_requeue(mdsc, ci);
}
- if (flags & CEPH_CAP_FLAG_AUTH)
- ci->i_auth_cap = cap;
- else if (ci->i_auth_cap == cap) {
+ 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) {
ci->i_auth_cap = NULL;
spin_lock(&mdsc->cap_dirty_lock);
if (!list_empty(&ci->i_dirty_item)) {