From: Long Li <longli@xxxxxxxxxxxxx>
Sometime Queue Pair may have errors if hardware is having trouble with connectivity issues. In this case, SMBD should terminate the RDMA connetion.
Signed-off-by: Long Li <longli@xxxxxxxxxxxxx>
---
fs/cifs/cifsrdma.c | 18 ++++++++++++++++++
fs/cifs/cifsrdma.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/fs/cifs/cifsrdma.c b/fs/cifs/cifsrdma.c
index fb94975..01cb006 100644
--- a/fs/cifs/cifsrdma.c
+++ b/fs/cifs/cifsrdma.c
@@ -202,6 +202,22 @@ static int cifs_rdma_process_disconnected(struct cifs_rdma_info *info)
return 0;
}
+static void cifs_disconnect_rdma_work(struct work_struct *work)
+{
+ struct cifs_rdma_info *info =
+ container_of(work, struct cifs_rdma_info, disconnect_work);
+
+ if (info->transport_status == CIFS_RDMA_CONNECTED) {
+ info->transport_status = CIFS_RDMA_DISCONNECTING;
+ rdma_disconnect(info->id);
+ }
+}
+
+static void cifs_disconnect_rdma_session(struct cifs_rdma_info *info)
+{
+ schedule_work(&info->disconnect_work);
+}
+
/* Upcall from RDMA CM */
static int cifs_rdma_conn_upcall(
struct rdma_cm_id *id, struct rdma_cm_event *event)
@@ -264,6 +280,7 @@ cifs_rdma_qp_async_error_upcall(struct ib_event *event, void *context)
case IB_EVENT_QP_FATAL:
case IB_EVENT_QP_REQ_ERR:
case IB_EVENT_QP_ACCESS_ERR:
+ cifs_disconnect_rdma_session(info);
default:
break;
@@ -1494,6 +1511,7 @@ struct cifs_rdma_info* cifs_create_rdma_session(
init_waitqueue_head(&info->wait_recv_pending);
atomic_set(&info->recv_pending, 0);
+ INIT_WORK(&info->disconnect_work, cifs_disconnect_rdma_work);
INIT_WORK(&info->destroy_work, cifs_destroy_rdma_work);
rc = cifs_rdma_negotiate(info);
diff --git a/fs/cifs/cifsrdma.h b/fs/cifs/cifsrdma.h
index 424ea8e..9306622 100644
--- a/fs/cifs/cifsrdma.h
+++ b/fs/cifs/cifsrdma.h
@@ -68,6 +68,7 @@ struct cifs_rdma_info {
bool negotiate_done;
struct work_struct destroy_work;
+ struct work_struct disconnect_work;
//connection paramters
int receive_credit_max;
--
2.7.4
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