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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>
This commit is contained in:
Yan, Zheng 2013-07-21 20:25:25 +08:00 committed by Sage Weil
parent c338c07c51
commit ad88f23f42
1 changed files with 2 additions and 0 deletions
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2
fs/ceph/dir.c
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@ -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);