ceph: quota: don't allow cross-quota renames

[mirror_ubuntu-bionic-kernel.git] / fs / ceph / dir.c

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index a6490d002ef596c13542b3a85bd40739d5fbe494..733f21cb8b4dcd2793c40a2ff041a7752d6ccfb6 100644 (file)
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1096,6 +1096,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
                else
                        return -EROFS;
        }
+       /* don't allow cross-quota renames */
+       if ((old_dir != new_dir) &&
+           (!ceph_quota_is_same_realm(old_dir, new_dir)))
+               return -EXDEV;
+
        dout("rename dir %p dentry %p to dir %p dentry %p\n",
             old_dir, old_dentry, new_dir, new_dentry);
        req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);