ceph: handle errors during osd client init

Unwind initializing if we get ENOMEM during client initialization.
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/mds_client.c

@@ -2552,7 +2552,7 @@ static void delayed_work(struct work_struct *work)
 }
 
 
-void ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
+int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
 {
 	mdsc->client = client;
 	mutex_init(&mdsc->mutex);
@@ -2582,6 +2582,7 @@ void ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
 	init_waitqueue_head(&mdsc->cap_flushing_wq);
 	spin_lock_init(&mdsc->dentry_lru_lock);
 	INIT_LIST_HEAD(&mdsc->dentry_lru);
+	return 0;
 }
 
 /*

fs/ceph/mds_client.h

@@ -282,7 +282,7 @@ extern void ceph_put_mds_session(struct ceph_mds_session *s);
 extern int ceph_send_msg_mds(struct ceph_mds_client *mdsc,
 			     struct ceph_msg *msg, int mds);
 
-extern void ceph_mdsc_init(struct ceph_mds_client *mdsc,
+extern int ceph_mdsc_init(struct ceph_mds_client *mdsc,
 			   struct ceph_client *client);
 extern void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc);
 extern void ceph_mdsc_stop(struct ceph_mds_client *mdsc);

fs/ceph/osd_client.c

@@ -1127,19 +1127,26 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
 	osdc->num_requests = 0;
 	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
 
+	err = -ENOMEM;
 	osdc->req_mempool = mempool_create_kmalloc_pool(10,
 					sizeof(struct ceph_osd_request));
 	if (!osdc->req_mempool)
-		return -ENOMEM;
+		goto out;
 
 	err = ceph_msgpool_init(&osdc->msgpool_op, 4096, 10, true);
 	if (err < 0)
-		return -ENOMEM;
+		goto out_mempool;
 	err = ceph_msgpool_init(&osdc->msgpool_op_reply, 512, 0, false);
 	if (err < 0)
-		return -ENOMEM;
-
+		goto out_msgpool;
 	return 0;
+
+out_msgpool:
+	ceph_msgpool_destroy(&osdc->msgpool_op);
+out_mempool:
+	mempool_destroy(osdc->req_mempool);
+out:
+	return err;
 }
 
 void ceph_osdc_stop(struct ceph_osd_client *osdc)

fs/ceph/super.c

@@ -530,9 +530,13 @@ static struct ceph_client *ceph_create_client(struct ceph_mount_args *args)
 	err = ceph_osdc_init(&client->osdc, client);
 	if (err < 0)
 		goto fail_monc;
-	ceph_mdsc_init(&client->mdsc, client);
+	err = ceph_mdsc_init(&client->mdsc, client);
+	if (err < 0)
+		goto fail_osdc;
 	return client;
 
+fail_osdc:
+	ceph_osdc_stop(&client->osdc);
 fail_monc:
 	ceph_monc_stop(&client->monc);
 fail_trunc_wq: