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[1/2] ceph: drop CAP_LINK_SHARED when sending "link" request to MDS

Message ID 1374409526-8297-1-git-send-email-zheng.z.yan@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Yan, Zheng July 21, 2013, 12:25 p.m. UTC 
From: "Yan, Zheng" <zheng.z.yan@intel.com>

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>
---
 fs/ceph/dir.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index f02d82b..0e4da4a 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);