From ad88f23f42a9b34a0b29a5b19d37251ccb7dd776 Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zheng.z.yan@intel.com>
Date: Sun, 21 Jul 2013 20:25:25 +0800
Subject: [PATCH] ceph: drop CAP_LINK_SHARED when sending "link" request to MDS
To handle "link" request, the MDS need to xlock inode's linklock,
which requires revoking any CAP_LINK_SHARED.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
---
fs/ceph/dir.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index f02d82b7933e..0e4da4a9c213 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -796,6 +796,8 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir,
req->r_locked_dir = dir;
req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
+ /* release LINK_SHARED on source inode (mds will lock it) */
+ req->r_old_inode_drop = CEPH_CAP_LINK_SHARED;
err = ceph_mdsc_do_request(mdsc, dir, req);
if (err) {
d_drop(dentry);
--
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