Commit ad88f23f authored by Yan, Zheng's avatar Yan, Zheng Committed by Sage Weil
Browse files

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: default avatarYan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: default avatarSage Weil <sage@inktank.com>
parent c338c07c

fs/ceph/dir.c

+2 −0
Original line number Diff line number Diff line
@@ -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);