From: Yan, Zheng <zheng.z.yan@intel.com>
Date: Fri, 4 Jan 2013 07:30:10 +0000 (+0800)
Subject: ceph: check mds_wanted for imported cap
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=390306c38dd43908f7f7730229999790a773d1d5;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

ceph: check mds_wanted for imported cap

The MDS may have incorrect wanted caps after importing caps. So the
client should check the value mds has and send cap update if necessary.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
---

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 40b5bbe63a39..1e1e02055a2b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2429,7 +2429,9 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant,
 		dout("mds wanted %s -> %s\n",
 		     ceph_cap_string(le32_to_cpu(grant->wanted)),
 		     ceph_cap_string(wanted));
-		grant->wanted = cpu_to_le32(wanted);
+		/* imported cap may not have correct mds_wanted */
+		if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT)
+			check_caps = 1;
 	}
 
 	cap->seq = seq;