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ceph: check migrate seq before changing auth cap

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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>
This commit is contained in:
Yan, Zheng 2013-05-31 16:37:11 +08:00 committed by Sage Weil
parent fc2744aa12
commit b8c2f3ae2d
1 changed files with 5 additions and 3 deletions
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6
fs/ceph/caps.c
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@ -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)) {