#define log_rdma_mr(level, fmt, args...) \
log_rdma(level, LOG_RDMA_MR, fmt, ##args)
-/*
- * Destroy the transport and related RDMA and memory resources
- * Need to go through all the pending counters and make sure on one is using
- * the transport while it is destroyed
- */
-static void smbd_destroy_rdma_work(struct work_struct *work)
-{
- struct smbd_response *response;
- struct smbd_connection *info =
- container_of(work, struct smbd_connection, destroy_work);
- unsigned long flags;
-
- log_rdma_event(INFO, "destroying qp\n");
- ib_drain_qp(info->id->qp);
- rdma_destroy_qp(info->id);
-
- /* Unblock all I/O waiting on the send queue */
- wake_up_interruptible_all(&info->wait_send_queue);
-
- log_rdma_event(INFO, "cancelling idle timer\n");
- cancel_delayed_work_sync(&info->idle_timer_work);
- log_rdma_event(INFO, "cancelling send immediate work\n");
- cancel_delayed_work_sync(&info->send_immediate_work);
-
- log_rdma_event(INFO, "wait for all send to finish\n");
- wait_event(info->wait_smbd_send_pending,
- info->smbd_send_pending == 0);
-
- log_rdma_event(INFO, "wait for all recv to finish\n");
- wake_up_interruptible(&info->wait_reassembly_queue);
- wait_event(info->wait_smbd_recv_pending,
- info->smbd_recv_pending == 0);
-
- log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
- wait_event(info->wait_send_pending,
- atomic_read(&info->send_pending) == 0);
- wait_event(info->wait_send_payload_pending,
- atomic_read(&info->send_payload_pending) == 0);
-
- log_rdma_event(INFO, "freeing mr list\n");
- wake_up_interruptible_all(&info->wait_mr);
- wait_event(info->wait_for_mr_cleanup,
- atomic_read(&info->mr_used_count) == 0);
- destroy_mr_list(info);
-
- /* It's not posssible for upper layer to get to reassembly */
- log_rdma_event(INFO, "drain the reassembly queue\n");
- do {
- spin_lock_irqsave(&info->reassembly_queue_lock, flags);
- response = _get_first_reassembly(info);
- if (response) {
- list_del(&response->list);
- spin_unlock_irqrestore(
- &info->reassembly_queue_lock, flags);
- put_receive_buffer(info, response);
- } else
- spin_unlock_irqrestore(&info->reassembly_queue_lock, flags);
- } while (response);
-
- info->reassembly_data_length = 0;
-
- log_rdma_event(INFO, "free receive buffers\n");
- wait_event(info->wait_receive_queues,
- info->count_receive_queue + info->count_empty_packet_queue
- == info->receive_credit_max);
- destroy_receive_buffers(info);
-
- ib_free_cq(info->send_cq);
- ib_free_cq(info->recv_cq);
- ib_dealloc_pd(info->pd);
- rdma_destroy_id(info->id);
-
- /* free mempools */
- mempool_destroy(info->request_mempool);
- kmem_cache_destroy(info->request_cache);
-
- mempool_destroy(info->response_mempool);
- kmem_cache_destroy(info->response_cache);
-
- info->transport_status = SMBD_DESTROYED;
- wake_up_all(&info->wait_destroy);
-}
-
-static int smbd_process_disconnected(struct smbd_connection *info)
-{
- schedule_work(&info->destroy_work);
- return 0;
-}
-
static void smbd_disconnect_rdma_work(struct work_struct *work)
{
struct smbd_connection *info =
}
info->transport_status = SMBD_DISCONNECTED;
- smbd_process_disconnected(info);
+ wake_up_interruptible(&info->disconn_wait);
+ wake_up_interruptible(&info->wait_reassembly_queue);
+ wake_up_interruptible_all(&info->wait_send_queue);
break;
default:
info->keep_alive_interval*HZ);
}
-/* Destroy this SMBD connection, called from upper layer */
-void smbd_destroy(struct smbd_connection *info)
+/*
+ * Destroy the transport and related RDMA and memory resources
+ * Need to go through all the pending counters and make sure on one is using
+ * the transport while it is destroyed
+ */
+void smbd_destroy(struct TCP_Server_Info *server)
{
+ struct smbd_connection *info = server->smbd_conn;
+ struct smbd_response *response;
+ unsigned long flags;
+
+ if (!info) {
+ log_rdma_event(INFO, "rdma session already destroyed\n");
+ return;
+ }
+
log_rdma_event(INFO, "destroying rdma session\n");
+ if (info->transport_status != SMBD_DISCONNECTED) {
+ rdma_disconnect(server->smbd_conn->id);
+ log_rdma_event(INFO, "wait for transport being disconnected\n");
+ wait_event_interruptible(
+ info->disconn_wait,
+ info->transport_status == SMBD_DISCONNECTED);
+ }
- /* Kick off the disconnection process */
- smbd_disconnect_rdma_connection(info);
+ log_rdma_event(INFO, "destroying qp\n");
+ ib_drain_qp(info->id->qp);
+ rdma_destroy_qp(info->id);
- log_rdma_event(INFO, "wait for transport being destroyed\n");
- wait_event(info->wait_destroy,
- info->transport_status == SMBD_DESTROYED);
+ log_rdma_event(INFO, "cancelling idle timer\n");
+ cancel_delayed_work_sync(&info->idle_timer_work);
+ log_rdma_event(INFO, "cancelling send immediate work\n");
+ cancel_delayed_work_sync(&info->send_immediate_work);
+
+ log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
+ wait_event(info->wait_send_pending,
+ atomic_read(&info->send_pending) == 0);
+ wait_event(info->wait_send_payload_pending,
+ atomic_read(&info->send_payload_pending) == 0);
+
+ /* It's not posssible for upper layer to get to reassembly */
+ log_rdma_event(INFO, "drain the reassembly queue\n");
+ do {
+ spin_lock_irqsave(&info->reassembly_queue_lock, flags);
+ response = _get_first_reassembly(info);
+ if (response) {
+ list_del(&response->list);
+ spin_unlock_irqrestore(
+ &info->reassembly_queue_lock, flags);
+ put_receive_buffer(info, response);
+ } else
+ spin_unlock_irqrestore(
+ &info->reassembly_queue_lock, flags);
+ } while (response);
+ info->reassembly_data_length = 0;
+
+ log_rdma_event(INFO, "free receive buffers\n");
+ wait_event(info->wait_receive_queues,
+ info->count_receive_queue + info->count_empty_packet_queue
+ == info->receive_credit_max);
+ destroy_receive_buffers(info);
+
+ /*
+ * For performance reasons, memory registration and deregistration
+ * are not locked by srv_mutex. It is possible some processes are
+ * blocked on transport srv_mutex while holding memory registration.
+ * Release the transport srv_mutex to allow them to hit the failure
+ * path when sending data, and then release memory registartions.
+ */
+ log_rdma_event(INFO, "freeing mr list\n");
+ wake_up_interruptible_all(&info->wait_mr);
+ while (atomic_read(&info->mr_used_count)) {
+ mutex_unlock(&server->srv_mutex);
+ msleep(1000);
+ mutex_lock(&server->srv_mutex);
+ }
+ destroy_mr_list(info);
+
+ ib_free_cq(info->send_cq);
+ ib_free_cq(info->recv_cq);
+ ib_dealloc_pd(info->pd);
+ rdma_destroy_id(info->id);
+
+ /* free mempools */
+ mempool_destroy(info->request_mempool);
+ kmem_cache_destroy(info->request_cache);
+
+ mempool_destroy(info->response_mempool);
+ kmem_cache_destroy(info->response_cache);
+
+ info->transport_status = SMBD_DESTROYED;
destroy_workqueue(info->workqueue);
kfree(info);
*/
if (server->smbd_conn->transport_status == SMBD_CONNECTED) {
log_rdma_event(INFO, "disconnecting transport\n");
- smbd_disconnect_rdma_connection(server->smbd_conn);
+ smbd_destroy(server);
}
- /* wait until the transport is destroyed */
- if (!wait_event_timeout(server->smbd_conn->wait_destroy,
- server->smbd_conn->transport_status == SMBD_DESTROYED, 5*HZ))
- return -EAGAIN;
-
- destroy_workqueue(server->smbd_conn->workqueue);
- kfree(server->smbd_conn);
-
create_conn:
log_rdma_event(INFO, "creating rdma session\n");
server->smbd_conn = smbd_get_connection(
conn_param.retry_count = SMBD_CM_RETRY;
conn_param.rnr_retry_count = SMBD_CM_RNR_RETRY;
conn_param.flow_control = 0;
- init_waitqueue_head(&info->wait_destroy);
log_rdma_event(INFO, "connecting to IP %pI4 port %d\n",
&addr_in->sin_addr, port);
init_waitqueue_head(&info->conn_wait);
+ init_waitqueue_head(&info->disconn_wait);
+ init_waitqueue_head(&info->wait_reassembly_queue);
rc = rdma_connect(info->id, &conn_param);
if (rc) {
log_rdma_event(ERR, "rdma_connect() failed with %i\n", rc);
}
init_waitqueue_head(&info->wait_send_queue);
- init_waitqueue_head(&info->wait_reassembly_queue);
-
INIT_DELAYED_WORK(&info->idle_timer_work, idle_connection_timer);
INIT_DELAYED_WORK(&info->send_immediate_work, send_immediate_work);
queue_delayed_work(info->workqueue, &info->idle_timer_work,
info->keep_alive_interval*HZ);
- init_waitqueue_head(&info->wait_smbd_send_pending);
- info->smbd_send_pending = 0;
-
- init_waitqueue_head(&info->wait_smbd_recv_pending);
- info->smbd_recv_pending = 0;
-
init_waitqueue_head(&info->wait_send_pending);
atomic_set(&info->send_pending, 0);
atomic_set(&info->send_payload_pending, 0);
INIT_WORK(&info->disconnect_work, smbd_disconnect_rdma_work);
- INIT_WORK(&info->destroy_work, smbd_destroy_rdma_work);
INIT_WORK(&info->recv_done_work, smbd_recv_done_work);
INIT_WORK(&info->post_send_credits_work, smbd_post_send_credits);
info->new_credits_offered = 0;
allocate_mr_failed:
/* At this point, need to a full transport shutdown */
- smbd_destroy(info);
+ smbd_destroy(server);
return NULL;
negotiation_failed:
int rc;
again:
- if (info->transport_status != SMBD_CONNECTED) {
- log_read(ERR, "disconnected\n");
- return -ENODEV;
- }
-
/*
* No need to hold the reassembly queue lock all the time as we are
* the only one reading from the front of the queue. The transport
info->transport_status != SMBD_CONNECTED);
/* Don't return any data if interrupted */
if (rc)
- return -ENODEV;
+ return rc;
+
+ if (info->transport_status != SMBD_CONNECTED) {
+ log_read(ERR, "disconnected\n");
+ return 0;
+ }
goto again;
}
unsigned int to_read, page_offset;
int rc;
- info->smbd_recv_pending++;
-
if (iov_iter_rw(&msg->msg_iter) == WRITE) {
/* It's a bug in upper layer to get there */
cifs_dbg(VFS, "CIFS: invalid msg iter dir %u\n",
}
out:
- info->smbd_recv_pending--;
- wake_up(&info->wait_smbd_recv_pending);
-
/* SMBDirect will read it all or nothing */
if (rc > 0)
msg->msg_iter.count = 0;
struct kvec *iov;
int rc;
- info->smbd_send_pending++;
if (info->transport_status != SMBD_CONNECTED) {
rc = -ENODEV;
goto done;
wait_event(info->wait_send_payload_pending,
atomic_read(&info->send_payload_pending) == 0);
- info->smbd_send_pending--;
- wake_up(&info->wait_smbd_send_pending);
-
return rc;
}
projects / linux.git / blobdiff