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ceph: fix rare potential cap leak

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If we grab new_cap, retake the lock, and find we already have a cap now
for the given mds, release new_cap.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2011-05-12 15:13:23 -07:00
parent 12a2f643b0
commit 3540303f87
1 changed files with 2 additions and 1 deletions
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3
fs/ceph/caps.c
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@ -569,7 +569,8 @@ retry:
list_add_tail(&cap->session_caps, &session->s_caps);
session->s_nr_caps++;
spin_unlock(&session->s_cap_lock);
}
} else if (new_cap)
ceph_put_cap(mdsc, new_cap);
if (!ci->i_snap_realm) {
/*