From 21a5bb4f93832f901463c8c0fb07554d63e3a867 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Wed, 28 May 2025 18:01:37 +0200
Subject: smb: client: make use of common smbdirect_socket

From: Stefan Metzmacher <metze@samba.org>

[ Upstream commit c3011b9a7deaaaabdf955815d29eac39c8b75e67 ]

This is the next step in the direction of a common smbdirect layer.
Currently only structures are shared, but that will change
over time until everything is shared.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Stable-dep-of: 43e7e284fc77 ("cifs: Fix the smbd_response slab to allow usercopy")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/smb/client/cifs_debug.c |   2 +-
 fs/smb/client/smbdirect.c  | 258 ++++++++++++++++++++-----------------
 fs/smb/client/smbdirect.h  |  12 +-
 3 files changed, 146 insertions(+), 126 deletions(-)

diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c
index e03c890de0a06..56b0b5c82dd19 100644
--- a/fs/smb/client/cifs_debug.c
+++ b/fs/smb/client/cifs_debug.c
@@ -387,7 +387,7 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 		seq_printf(m, "\nSMBDirect (in hex) protocol version: %x "
 			"transport status: %x",
 			server->smbd_conn->protocol,
-			server->smbd_conn->transport_status);
+			server->smbd_conn->socket.status);
 		seq_printf(m, "\nConn receive_credit_max: %x "
 			"send_credit_target: %x max_send_size: %x",
 			server->smbd_conn->receive_credit_max,
diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c
index d506ab259e082..ac489df8151a1 100644
--- a/fs/smb/client/smbdirect.c
+++ b/fs/smb/client/smbdirect.c
@@ -163,10 +163,11 @@ static void smbd_disconnect_rdma_work(struct work_struct *work)
 {
 	struct smbd_connection *info =
 		container_of(work, struct smbd_connection, disconnect_work);
+	struct smbdirect_socket *sc = &info->socket;
 
-	if (info->transport_status == SMBD_CONNECTED) {
-		info->transport_status = SMBD_DISCONNECTING;
-		rdma_disconnect(info->id);
+	if (sc->status == SMBDIRECT_SOCKET_CONNECTED) {
+		sc->status = SMBDIRECT_SOCKET_DISCONNECTING;
+		rdma_disconnect(sc->rdma.cm_id);
 	}
 }
 
@@ -180,6 +181,7 @@ static int smbd_conn_upcall(
 		struct rdma_cm_id *id, struct rdma_cm_event *event)
 {
 	struct smbd_connection *info = id->context;
+	struct smbdirect_socket *sc = &info->socket;
 
 	log_rdma_event(INFO, "event=%d status=%d\n",
 		event->event, event->status);
@@ -203,7 +205,7 @@ static int smbd_conn_upcall(
 
 	case RDMA_CM_EVENT_ESTABLISHED:
 		log_rdma_event(INFO, "connected event=%d\n", event->event);
-		info->transport_status = SMBD_CONNECTED;
+		sc->status = SMBDIRECT_SOCKET_CONNECTED;
 		wake_up_interruptible(&info->conn_wait);
 		break;
 
@@ -211,20 +213,20 @@ static int smbd_conn_upcall(
 	case RDMA_CM_EVENT_UNREACHABLE:
 	case RDMA_CM_EVENT_REJECTED:
 		log_rdma_event(INFO, "connecting failed event=%d\n", event->event);
-		info->transport_status = SMBD_DISCONNECTED;
+		sc->status = SMBDIRECT_SOCKET_DISCONNECTED;
 		wake_up_interruptible(&info->conn_wait);
 		break;
 
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
 	case RDMA_CM_EVENT_DISCONNECTED:
 		/* This happens when we fail the negotiation */
-		if (info->transport_status == SMBD_NEGOTIATE_FAILED) {
-			info->transport_status = SMBD_DISCONNECTED;
+		if (sc->status == SMBDIRECT_SOCKET_NEGOTIATE_FAILED) {
+			sc->status = SMBDIRECT_SOCKET_DISCONNECTED;
 			wake_up(&info->conn_wait);
 			break;
 		}
 
-		info->transport_status = SMBD_DISCONNECTED;
+		sc->status = SMBDIRECT_SOCKET_DISCONNECTED;
 		wake_up_interruptible(&info->disconn_wait);
 		wake_up_interruptible(&info->wait_reassembly_queue);
 		wake_up_interruptible_all(&info->wait_send_queue);
@@ -273,6 +275,8 @@ static void send_done(struct ib_cq *cq, struct ib_wc *wc)
 	int i;
 	struct smbd_request *request =
 		container_of(wc->wr_cqe, struct smbd_request, cqe);
+	struct smbd_connection *info = request->info;
+	struct smbdirect_socket *sc = &info->socket;
 
 	log_rdma_send(INFO, "smbd_request 0x%p completed wc->status=%d\n",
 		request, wc->status);
@@ -284,7 +288,7 @@ static void send_done(struct ib_cq *cq, struct ib_wc *wc)
 	}
 
 	for (i = 0; i < request->num_sge; i++)
-		ib_dma_unmap_single(request->info->id->device,
+		ib_dma_unmap_single(sc->ib.dev,
 			request->sge[i].addr,
 			request->sge[i].length,
 			DMA_TO_DEVICE);
@@ -391,8 +395,9 @@ static void smbd_post_send_credits(struct work_struct *work)
 	struct smbd_connection *info =
 		container_of(work, struct smbd_connection,
 			post_send_credits_work);
+	struct smbdirect_socket *sc = &info->socket;
 
-	if (info->transport_status != SMBD_CONNECTED) {
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED) {
 		wake_up(&info->wait_receive_queues);
 		return;
 	}
@@ -633,32 +638,34 @@ static int smbd_ia_open(
 		struct smbd_connection *info,
 		struct sockaddr *dstaddr, int port)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	int rc;
 
-	info->id = smbd_create_id(info, dstaddr, port);
-	if (IS_ERR(info->id)) {
-		rc = PTR_ERR(info->id);
+	sc->rdma.cm_id = smbd_create_id(info, dstaddr, port);
+	if (IS_ERR(sc->rdma.cm_id)) {
+		rc = PTR_ERR(sc->rdma.cm_id);
 		goto out1;
 	}
+	sc->ib.dev = sc->rdma.cm_id->device;
 
-	if (!frwr_is_supported(&info->id->device->attrs)) {
+	if (!frwr_is_supported(&sc->ib.dev->attrs)) {
 		log_rdma_event(ERR, "Fast Registration Work Requests (FRWR) is not supported\n");
 		log_rdma_event(ERR, "Device capability flags = %llx max_fast_reg_page_list_len = %u\n",
-			       info->id->device->attrs.device_cap_flags,
-			       info->id->device->attrs.max_fast_reg_page_list_len);
+			       sc->ib.dev->attrs.device_cap_flags,
+			       sc->ib.dev->attrs.max_fast_reg_page_list_len);
 		rc = -EPROTONOSUPPORT;
 		goto out2;
 	}
 	info->max_frmr_depth = min_t(int,
 		smbd_max_frmr_depth,
-		info->id->device->attrs.max_fast_reg_page_list_len);
+		sc->ib.dev->attrs.max_fast_reg_page_list_len);
 	info->mr_type = IB_MR_TYPE_MEM_REG;
-	if (info->id->device->attrs.kernel_cap_flags & IBK_SG_GAPS_REG)
+	if (sc->ib.dev->attrs.kernel_cap_flags & IBK_SG_GAPS_REG)
 		info->mr_type = IB_MR_TYPE_SG_GAPS;
 
-	info->pd = ib_alloc_pd(info->id->device, 0);
-	if (IS_ERR(info->pd)) {
-		rc = PTR_ERR(info->pd);
+	sc->ib.pd = ib_alloc_pd(sc->ib.dev, 0);
+	if (IS_ERR(sc->ib.pd)) {
+		rc = PTR_ERR(sc->ib.pd);
 		log_rdma_event(ERR, "ib_alloc_pd() returned %d\n", rc);
 		goto out2;
 	}
@@ -666,8 +673,8 @@ static int smbd_ia_open(
 	return 0;
 
 out2:
-	rdma_destroy_id(info->id);
-	info->id = NULL;
+	rdma_destroy_id(sc->rdma.cm_id);
+	sc->rdma.cm_id = NULL;
 
 out1:
 	return rc;
@@ -681,6 +688,7 @@ static int smbd_ia_open(
  */
 static int smbd_post_send_negotiate_req(struct smbd_connection *info)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct ib_send_wr send_wr;
 	int rc = -ENOMEM;
 	struct smbd_request *request;
@@ -704,18 +712,18 @@ static int smbd_post_send_negotiate_req(struct smbd_connection *info)
 
 	request->num_sge = 1;
 	request->sge[0].addr = ib_dma_map_single(
-				info->id->device, (void *)packet,
+				sc->ib.dev, (void *)packet,
 				sizeof(*packet), DMA_TO_DEVICE);
-	if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
+	if (ib_dma_mapping_error(sc->ib.dev, request->sge[0].addr)) {
 		rc = -EIO;
 		goto dma_mapping_failed;
 	}
 
 	request->sge[0].length = sizeof(*packet);
-	request->sge[0].lkey = info->pd->local_dma_lkey;
+	request->sge[0].lkey = sc->ib.pd->local_dma_lkey;
 
 	ib_dma_sync_single_for_device(
-		info->id->device, request->sge[0].addr,
+		sc->ib.dev, request->sge[0].addr,
 		request->sge[0].length, DMA_TO_DEVICE);
 
 	request->cqe.done = send_done;
@@ -732,14 +740,14 @@ static int smbd_post_send_negotiate_req(struct smbd_connection *info)
 		request->sge[0].length, request->sge[0].lkey);
 
 	atomic_inc(&info->send_pending);
-	rc = ib_post_send(info->id->qp, &send_wr, NULL);
+	rc = ib_post_send(sc->ib.qp, &send_wr, NULL);
 	if (!rc)
 		return 0;
 
 	/* if we reach here, post send failed */
 	log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
 	atomic_dec(&info->send_pending);
-	ib_dma_unmap_single(info->id->device, request->sge[0].addr,
+	ib_dma_unmap_single(sc->ib.dev, request->sge[0].addr,
 		request->sge[0].length, DMA_TO_DEVICE);
 
 	smbd_disconnect_rdma_connection(info);
@@ -791,6 +799,7 @@ static int manage_keep_alive_before_sending(struct smbd_connection *info)
 static int smbd_post_send(struct smbd_connection *info,
 		struct smbd_request *request)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct ib_send_wr send_wr;
 	int rc, i;
 
@@ -799,7 +808,7 @@ static int smbd_post_send(struct smbd_connection *info,
 			"rdma_request sge[%d] addr=0x%llx length=%u\n",
 			i, request->sge[i].addr, request->sge[i].length);
 		ib_dma_sync_single_for_device(
-			info->id->device,
+			sc->ib.dev,
 			request->sge[i].addr,
 			request->sge[i].length,
 			DMA_TO_DEVICE);
@@ -814,7 +823,7 @@ static int smbd_post_send(struct smbd_connection *info,
 	send_wr.opcode = IB_WR_SEND;
 	send_wr.send_flags = IB_SEND_SIGNALED;
 
-	rc = ib_post_send(info->id->qp, &send_wr, NULL);
+	rc = ib_post_send(sc->ib.qp, &send_wr, NULL);
 	if (rc) {
 		log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
 		smbd_disconnect_rdma_connection(info);
@@ -831,6 +840,7 @@ static int smbd_post_send_iter(struct smbd_connection *info,
 			       struct iov_iter *iter,
 			       int *_remaining_data_length)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	int i, rc;
 	int header_length;
 	int data_length;
@@ -842,11 +852,11 @@ static int smbd_post_send_iter(struct smbd_connection *info,
 	/* Wait for send credits. A SMBD packet needs one credit */
 	rc = wait_event_interruptible(info->wait_send_queue,
 		atomic_read(&info->send_credits) > 0 ||
-		info->transport_status != SMBD_CONNECTED);
+		sc->status != SMBDIRECT_SOCKET_CONNECTED);
 	if (rc)
 		goto err_wait_credit;
 
-	if (info->transport_status != SMBD_CONNECTED) {
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED) {
 		log_outgoing(ERR, "disconnected not sending on wait_credit\n");
 		rc = -EAGAIN;
 		goto err_wait_credit;
@@ -859,9 +869,9 @@ static int smbd_post_send_iter(struct smbd_connection *info,
 wait_send_queue:
 	wait_event(info->wait_post_send,
 		atomic_read(&info->send_pending) < info->send_credit_target ||
-		info->transport_status != SMBD_CONNECTED);
+		sc->status != SMBDIRECT_SOCKET_CONNECTED);
 
-	if (info->transport_status != SMBD_CONNECTED) {
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED) {
 		log_outgoing(ERR, "disconnected not sending on wait_send_queue\n");
 		rc = -EAGAIN;
 		goto err_wait_send_queue;
@@ -888,8 +898,8 @@ static int smbd_post_send_iter(struct smbd_connection *info,
 			.nr_sge		= 1,
 			.max_sge	= SMBDIRECT_MAX_SEND_SGE,
 			.sge		= request->sge,
-			.device		= info->id->device,
-			.local_dma_lkey	= info->pd->local_dma_lkey,
+			.device		= sc->ib.dev,
+			.local_dma_lkey	= sc->ib.pd->local_dma_lkey,
 			.direction	= DMA_TO_DEVICE,
 		};
 
@@ -941,18 +951,18 @@ static int smbd_post_send_iter(struct smbd_connection *info,
 	if (!data_length)
 		header_length = offsetof(struct smbdirect_data_transfer, padding);
 
-	request->sge[0].addr = ib_dma_map_single(info->id->device,
+	request->sge[0].addr = ib_dma_map_single(sc->ib.dev,
 						 (void *)packet,
 						 header_length,
 						 DMA_TO_DEVICE);
-	if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
+	if (ib_dma_mapping_error(sc->ib.dev, request->sge[0].addr)) {
 		rc = -EIO;
 		request->sge[0].addr = 0;
 		goto err_dma;
 	}
 
 	request->sge[0].length = header_length;
-	request->sge[0].lkey = info->pd->local_dma_lkey;
+	request->sge[0].lkey = sc->ib.pd->local_dma_lkey;
 
 	rc = smbd_post_send(info, request);
 	if (!rc)
@@ -961,7 +971,7 @@ static int smbd_post_send_iter(struct smbd_connection *info,
 err_dma:
 	for (i = 0; i < request->num_sge; i++)
 		if (request->sge[i].addr)
-			ib_dma_unmap_single(info->id->device,
+			ib_dma_unmap_single(sc->ib.dev,
 					    request->sge[i].addr,
 					    request->sge[i].length,
 					    DMA_TO_DEVICE);
@@ -1006,17 +1016,18 @@ static int smbd_post_send_empty(struct smbd_connection *info)
 static int smbd_post_recv(
 		struct smbd_connection *info, struct smbd_response *response)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct ib_recv_wr recv_wr;
 	int rc = -EIO;
 
 	response->sge.addr = ib_dma_map_single(
-				info->id->device, response->packet,
+				sc->ib.dev, response->packet,
 				info->max_receive_size, DMA_FROM_DEVICE);
-	if (ib_dma_mapping_error(info->id->device, response->sge.addr))
+	if (ib_dma_mapping_error(sc->ib.dev, response->sge.addr))
 		return rc;
 
 	response->sge.length = info->max_receive_size;
-	response->sge.lkey = info->pd->local_dma_lkey;
+	response->sge.lkey = sc->ib.pd->local_dma_lkey;
 
 	response->cqe.done = recv_done;
 
@@ -1025,9 +1036,9 @@ static int smbd_post_recv(
 	recv_wr.sg_list = &response->sge;
 	recv_wr.num_sge = 1;
 
-	rc = ib_post_recv(info->id->qp, &recv_wr, NULL);
+	rc = ib_post_recv(sc->ib.qp, &recv_wr, NULL);
 	if (rc) {
-		ib_dma_unmap_single(info->id->device, response->sge.addr,
+		ib_dma_unmap_single(sc->ib.dev, response->sge.addr,
 				    response->sge.length, DMA_FROM_DEVICE);
 		smbd_disconnect_rdma_connection(info);
 		log_rdma_recv(ERR, "ib_post_recv failed rc=%d\n", rc);
@@ -1185,9 +1196,10 @@ static struct smbd_response *get_receive_buffer(struct smbd_connection *info)
 static void put_receive_buffer(
 	struct smbd_connection *info, struct smbd_response *response)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	unsigned long flags;
 
-	ib_dma_unmap_single(info->id->device, response->sge.addr,
+	ib_dma_unmap_single(sc->ib.dev, response->sge.addr,
 		response->sge.length, DMA_FROM_DEVICE);
 
 	spin_lock_irqsave(&info->receive_queue_lock, flags);
@@ -1287,6 +1299,7 @@ static void idle_connection_timer(struct work_struct *work)
 void smbd_destroy(struct TCP_Server_Info *server)
 {
 	struct smbd_connection *info = server->smbd_conn;
+	struct smbdirect_socket *sc;
 	struct smbd_response *response;
 	unsigned long flags;
 
@@ -1294,19 +1307,21 @@ void smbd_destroy(struct TCP_Server_Info *server)
 		log_rdma_event(INFO, "rdma session already destroyed\n");
 		return;
 	}
+	sc = &info->socket;
 
 	log_rdma_event(INFO, "destroying rdma session\n");
-	if (info->transport_status != SMBD_DISCONNECTED) {
-		rdma_disconnect(server->smbd_conn->id);
+	if (sc->status != SMBDIRECT_SOCKET_DISCONNECTED) {
+		rdma_disconnect(sc->rdma.cm_id);
 		log_rdma_event(INFO, "wait for transport being disconnected\n");
 		wait_event_interruptible(
 			info->disconn_wait,
-			info->transport_status == SMBD_DISCONNECTED);
+			sc->status == SMBDIRECT_SOCKET_DISCONNECTED);
 	}
 
 	log_rdma_event(INFO, "destroying qp\n");
-	ib_drain_qp(info->id->qp);
-	rdma_destroy_qp(info->id);
+	ib_drain_qp(sc->ib.qp);
+	rdma_destroy_qp(sc->rdma.cm_id);
+	sc->ib.qp = NULL;
 
 	log_rdma_event(INFO, "cancelling idle timer\n");
 	cancel_delayed_work_sync(&info->idle_timer_work);
@@ -1353,10 +1368,10 @@ void smbd_destroy(struct TCP_Server_Info *server)
 	}
 	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);
+	ib_free_cq(sc->ib.send_cq);
+	ib_free_cq(sc->ib.recv_cq);
+	ib_dealloc_pd(sc->ib.pd);
+	rdma_destroy_id(sc->rdma.cm_id);
 
 	/* free mempools */
 	mempool_destroy(info->request_mempool);
@@ -1365,7 +1380,7 @@ void smbd_destroy(struct TCP_Server_Info *server)
 	mempool_destroy(info->response_mempool);
 	kmem_cache_destroy(info->response_cache);
 
-	info->transport_status = SMBD_DESTROYED;
+	sc->status = SMBDIRECT_SOCKET_DESTROYED;
 
 	destroy_workqueue(info->workqueue);
 	log_rdma_event(INFO,  "rdma session destroyed\n");
@@ -1390,7 +1405,7 @@ int smbd_reconnect(struct TCP_Server_Info *server)
 	 * This is possible if transport is disconnected and we haven't received
 	 * notification from RDMA, but upper layer has detected timeout
 	 */
-	if (server->smbd_conn->transport_status == SMBD_CONNECTED) {
+	if (server->smbd_conn->socket.status == SMBDIRECT_SOCKET_CONNECTED) {
 		log_rdma_event(INFO, "disconnecting transport\n");
 		smbd_destroy(server);
 	}
@@ -1489,6 +1504,7 @@ static struct smbd_connection *_smbd_get_connection(
 {
 	int rc;
 	struct smbd_connection *info;
+	struct smbdirect_socket *sc;
 	struct rdma_conn_param conn_param;
 	struct ib_qp_init_attr qp_attr;
 	struct sockaddr_in *addr_in = (struct sockaddr_in *) dstaddr;
@@ -1498,29 +1514,30 @@ static struct smbd_connection *_smbd_get_connection(
 	info = kzalloc(sizeof(struct smbd_connection), GFP_KERNEL);
 	if (!info)
 		return NULL;
+	sc = &info->socket;
 
-	info->transport_status = SMBD_CONNECTING;
+	sc->status = SMBDIRECT_SOCKET_CONNECTING;
 	rc = smbd_ia_open(info, dstaddr, port);
 	if (rc) {
 		log_rdma_event(INFO, "smbd_ia_open rc=%d\n", rc);
 		goto create_id_failed;
 	}
 
-	if (smbd_send_credit_target > info->id->device->attrs.max_cqe ||
-	    smbd_send_credit_target > info->id->device->attrs.max_qp_wr) {
+	if (smbd_send_credit_target > sc->ib.dev->attrs.max_cqe ||
+	    smbd_send_credit_target > sc->ib.dev->attrs.max_qp_wr) {
 		log_rdma_event(ERR, "consider lowering send_credit_target = %d. Possible CQE overrun, device reporting max_cqe %d max_qp_wr %d\n",
 			       smbd_send_credit_target,
-			       info->id->device->attrs.max_cqe,
-			       info->id->device->attrs.max_qp_wr);
+			       sc->ib.dev->attrs.max_cqe,
+			       sc->ib.dev->attrs.max_qp_wr);
 		goto config_failed;
 	}
 
-	if (smbd_receive_credit_max > info->id->device->attrs.max_cqe ||
-	    smbd_receive_credit_max > info->id->device->attrs.max_qp_wr) {
+	if (smbd_receive_credit_max > sc->ib.dev->attrs.max_cqe ||
+	    smbd_receive_credit_max > sc->ib.dev->attrs.max_qp_wr) {
 		log_rdma_event(ERR, "consider lowering receive_credit_max = %d. Possible CQE overrun, device reporting max_cqe %d max_qp_wr %d\n",
 			       smbd_receive_credit_max,
-			       info->id->device->attrs.max_cqe,
-			       info->id->device->attrs.max_qp_wr);
+			       sc->ib.dev->attrs.max_cqe,
+			       sc->ib.dev->attrs.max_qp_wr);
 		goto config_failed;
 	}
 
@@ -1531,32 +1548,30 @@ static struct smbd_connection *_smbd_get_connection(
 	info->max_receive_size = smbd_max_receive_size;
 	info->keep_alive_interval = smbd_keep_alive_interval;
 
-	if (info->id->device->attrs.max_send_sge < SMBDIRECT_MAX_SEND_SGE ||
-	    info->id->device->attrs.max_recv_sge < SMBDIRECT_MAX_RECV_SGE) {
+	if (sc->ib.dev->attrs.max_send_sge < SMBDIRECT_MAX_SEND_SGE ||
+	    sc->ib.dev->attrs.max_recv_sge < SMBDIRECT_MAX_RECV_SGE) {
 		log_rdma_event(ERR,
 			"device %.*s max_send_sge/max_recv_sge = %d/%d too small\n",
 			IB_DEVICE_NAME_MAX,
-			info->id->device->name,
-			info->id->device->attrs.max_send_sge,
-			info->id->device->attrs.max_recv_sge);
+			sc->ib.dev->name,
+			sc->ib.dev->attrs.max_send_sge,
+			sc->ib.dev->attrs.max_recv_sge);
 		goto config_failed;
 	}
 
-	info->send_cq = NULL;
-	info->recv_cq = NULL;
-	info->send_cq =
-		ib_alloc_cq_any(info->id->device, info,
+	sc->ib.send_cq =
+		ib_alloc_cq_any(sc->ib.dev, info,
 				info->send_credit_target, IB_POLL_SOFTIRQ);
-	if (IS_ERR(info->send_cq)) {
-		info->send_cq = NULL;
+	if (IS_ERR(sc->ib.send_cq)) {
+		sc->ib.send_cq = NULL;
 		goto alloc_cq_failed;
 	}
 
-	info->recv_cq =
-		ib_alloc_cq_any(info->id->device, info,
+	sc->ib.recv_cq =
+		ib_alloc_cq_any(sc->ib.dev, info,
 				info->receive_credit_max, IB_POLL_SOFTIRQ);
-	if (IS_ERR(info->recv_cq)) {
-		info->recv_cq = NULL;
+	if (IS_ERR(sc->ib.recv_cq)) {
+		sc->ib.recv_cq = NULL;
 		goto alloc_cq_failed;
 	}
 
@@ -1570,29 +1585,30 @@ static struct smbd_connection *_smbd_get_connection(
 	qp_attr.cap.max_inline_data = 0;
 	qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
 	qp_attr.qp_type = IB_QPT_RC;
-	qp_attr.send_cq = info->send_cq;
-	qp_attr.recv_cq = info->recv_cq;
+	qp_attr.send_cq = sc->ib.send_cq;
+	qp_attr.recv_cq = sc->ib.recv_cq;
 	qp_attr.port_num = ~0;
 
-	rc = rdma_create_qp(info->id, info->pd, &qp_attr);
+	rc = rdma_create_qp(sc->rdma.cm_id, sc->ib.pd, &qp_attr);
 	if (rc) {
 		log_rdma_event(ERR, "rdma_create_qp failed %i\n", rc);
 		goto create_qp_failed;
 	}
+	sc->ib.qp = sc->rdma.cm_id->qp;
 
 	memset(&conn_param, 0, sizeof(conn_param));
 	conn_param.initiator_depth = 0;
 
 	conn_param.responder_resources =
-		min(info->id->device->attrs.max_qp_rd_atom,
+		min(sc->ib.dev->attrs.max_qp_rd_atom,
 		    SMBD_CM_RESPONDER_RESOURCES);
 	info->responder_resources = conn_param.responder_resources;
 	log_rdma_mr(INFO, "responder_resources=%d\n",
 		info->responder_resources);
 
 	/* Need to send IRD/ORD in private data for iWARP */
-	info->id->device->ops.get_port_immutable(
-		info->id->device, info->id->port_num, &port_immutable);
+	sc->ib.dev->ops.get_port_immutable(
+		sc->ib.dev, sc->rdma.cm_id->port_num, &port_immutable);
 	if (port_immutable.core_cap_flags & RDMA_CORE_PORT_IWARP) {
 		ird_ord_hdr[0] = info->responder_resources;
 		ird_ord_hdr[1] = 1;
@@ -1613,16 +1629,16 @@ static struct smbd_connection *_smbd_get_connection(
 	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);
+	rc = rdma_connect(sc->rdma.cm_id, &conn_param);
 	if (rc) {
 		log_rdma_event(ERR, "rdma_connect() failed with %i\n", rc);
 		goto rdma_connect_failed;
 	}
 
 	wait_event_interruptible(
-		info->conn_wait, info->transport_status != SMBD_CONNECTING);
+		info->conn_wait, sc->status != SMBDIRECT_SOCKET_CONNECTING);
 
-	if (info->transport_status != SMBD_CONNECTED) {
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED) {
 		log_rdma_event(ERR, "rdma_connect failed port=%d\n", port);
 		goto rdma_connect_failed;
 	}
@@ -1673,26 +1689,26 @@ static struct smbd_connection *_smbd_get_connection(
 negotiation_failed:
 	cancel_delayed_work_sync(&info->idle_timer_work);
 	destroy_caches_and_workqueue(info);
-	info->transport_status = SMBD_NEGOTIATE_FAILED;
+	sc->status = SMBDIRECT_SOCKET_NEGOTIATE_FAILED;
 	init_waitqueue_head(&info->conn_wait);
-	rdma_disconnect(info->id);
+	rdma_disconnect(sc->rdma.cm_id);
 	wait_event(info->conn_wait,
-		info->transport_status == SMBD_DISCONNECTED);
+		sc->status == SMBDIRECT_SOCKET_DISCONNECTED);
 
 allocate_cache_failed:
 rdma_connect_failed:
-	rdma_destroy_qp(info->id);
+	rdma_destroy_qp(sc->rdma.cm_id);
 
 create_qp_failed:
 alloc_cq_failed:
-	if (info->send_cq)
-		ib_free_cq(info->send_cq);
-	if (info->recv_cq)
-		ib_free_cq(info->recv_cq);
+	if (sc->ib.send_cq)
+		ib_free_cq(sc->ib.send_cq);
+	if (sc->ib.recv_cq)
+		ib_free_cq(sc->ib.recv_cq);
 
 config_failed:
-	ib_dealloc_pd(info->pd);
-	rdma_destroy_id(info->id);
+	ib_dealloc_pd(sc->ib.pd);
+	rdma_destroy_id(sc->rdma.cm_id);
 
 create_id_failed:
 	kfree(info);
@@ -1732,6 +1748,7 @@ struct smbd_connection *smbd_get_connection(
 static int smbd_recv_buf(struct smbd_connection *info, char *buf,
 		unsigned int size)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct smbd_response *response;
 	struct smbdirect_data_transfer *data_transfer;
 	int to_copy, to_read, data_read, offset;
@@ -1846,12 +1863,12 @@ static int smbd_recv_buf(struct smbd_connection *info, char *buf,
 	rc = wait_event_interruptible(
 		info->wait_reassembly_queue,
 		info->reassembly_data_length >= size ||
-			info->transport_status != SMBD_CONNECTED);
+			sc->status != SMBDIRECT_SOCKET_CONNECTED);
 	/* Don't return any data if interrupted */
 	if (rc)
 		return rc;
 
-	if (info->transport_status != SMBD_CONNECTED) {
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED) {
 		log_read(ERR, "disconnected\n");
 		return -ECONNABORTED;
 	}
@@ -1869,6 +1886,7 @@ static int smbd_recv_page(struct smbd_connection *info,
 		struct page *page, unsigned int page_offset,
 		unsigned int to_read)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	int ret;
 	char *to_address;
 	void *page_address;
@@ -1877,7 +1895,7 @@ static int smbd_recv_page(struct smbd_connection *info,
 	ret = wait_event_interruptible(
 		info->wait_reassembly_queue,
 		info->reassembly_data_length >= to_read ||
-			info->transport_status != SMBD_CONNECTED);
+			sc->status != SMBDIRECT_SOCKET_CONNECTED);
 	if (ret)
 		return ret;
 
@@ -1952,12 +1970,13 @@ int smbd_send(struct TCP_Server_Info *server,
 	int num_rqst, struct smb_rqst *rqst_array)
 {
 	struct smbd_connection *info = server->smbd_conn;
+	struct smbdirect_socket *sc = &info->socket;
 	struct smb_rqst *rqst;
 	struct iov_iter iter;
 	unsigned int remaining_data_length, klen;
 	int rc, i, rqst_idx;
 
-	if (info->transport_status != SMBD_CONNECTED)
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED)
 		return -EAGAIN;
 
 	/*
@@ -2051,6 +2070,7 @@ static void smbd_mr_recovery_work(struct work_struct *work)
 {
 	struct smbd_connection *info =
 		container_of(work, struct smbd_connection, mr_recovery_work);
+	struct smbdirect_socket *sc = &info->socket;
 	struct smbd_mr *smbdirect_mr;
 	int rc;
 
@@ -2068,7 +2088,7 @@ static void smbd_mr_recovery_work(struct work_struct *work)
 			}
 
 			smbdirect_mr->mr = ib_alloc_mr(
-				info->pd, info->mr_type,
+				sc->ib.pd, info->mr_type,
 				info->max_frmr_depth);
 			if (IS_ERR(smbdirect_mr->mr)) {
 				log_rdma_mr(ERR, "ib_alloc_mr failed mr_type=%x max_frmr_depth=%x\n",
@@ -2097,12 +2117,13 @@ static void smbd_mr_recovery_work(struct work_struct *work)
 
 static void destroy_mr_list(struct smbd_connection *info)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct smbd_mr *mr, *tmp;
 
 	cancel_work_sync(&info->mr_recovery_work);
 	list_for_each_entry_safe(mr, tmp, &info->mr_list, list) {
 		if (mr->state == MR_INVALIDATED)
-			ib_dma_unmap_sg(info->id->device, mr->sgt.sgl,
+			ib_dma_unmap_sg(sc->ib.dev, mr->sgt.sgl,
 				mr->sgt.nents, mr->dir);
 		ib_dereg_mr(mr->mr);
 		kfree(mr->sgt.sgl);
@@ -2119,6 +2140,7 @@ static void destroy_mr_list(struct smbd_connection *info)
  */
 static int allocate_mr_list(struct smbd_connection *info)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	int i;
 	struct smbd_mr *smbdirect_mr, *tmp;
 
@@ -2134,7 +2156,7 @@ static int allocate_mr_list(struct smbd_connection *info)
 		smbdirect_mr = kzalloc(sizeof(*smbdirect_mr), GFP_KERNEL);
 		if (!smbdirect_mr)
 			goto cleanup_entries;
-		smbdirect_mr->mr = ib_alloc_mr(info->pd, info->mr_type,
+		smbdirect_mr->mr = ib_alloc_mr(sc->ib.pd, info->mr_type,
 					info->max_frmr_depth);
 		if (IS_ERR(smbdirect_mr->mr)) {
 			log_rdma_mr(ERR, "ib_alloc_mr failed mr_type=%x max_frmr_depth=%x\n",
@@ -2179,20 +2201,20 @@ static int allocate_mr_list(struct smbd_connection *info)
  */
 static struct smbd_mr *get_mr(struct smbd_connection *info)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct smbd_mr *ret;
 	int rc;
 again:
 	rc = wait_event_interruptible(info->wait_mr,
 		atomic_read(&info->mr_ready_count) ||
-		info->transport_status != SMBD_CONNECTED);
+		sc->status != SMBDIRECT_SOCKET_CONNECTED);
 	if (rc) {
 		log_rdma_mr(ERR, "wait_event_interruptible rc=%x\n", rc);
 		return NULL;
 	}
 
-	if (info->transport_status != SMBD_CONNECTED) {
-		log_rdma_mr(ERR, "info->transport_status=%x\n",
-			info->transport_status);
+	if (sc->status != SMBDIRECT_SOCKET_CONNECTED) {
+		log_rdma_mr(ERR, "sc->status=%x\n", sc->status);
 		return NULL;
 	}
 
@@ -2245,6 +2267,7 @@ struct smbd_mr *smbd_register_mr(struct smbd_connection *info,
 				 struct iov_iter *iter,
 				 bool writing, bool need_invalidate)
 {
+	struct smbdirect_socket *sc = &info->socket;
 	struct smbd_mr *smbdirect_mr;
 	int rc, num_pages;
 	enum dma_data_direction dir;
@@ -2274,7 +2297,7 @@ struct smbd_mr *smbd_register_mr(struct smbd_connection *info,
 		    num_pages, iov_iter_count(iter), info->max_frmr_depth);
 	smbd_iter_to_mr(info, iter, &smbdirect_mr->sgt, info->max_frmr_depth);
 
-	rc = ib_dma_map_sg(info->id->device, smbdirect_mr->sgt.sgl,
+	rc = ib_dma_map_sg(sc->ib.dev, smbdirect_mr->sgt.sgl,
 			   smbdirect_mr->sgt.nents, dir);
 	if (!rc) {
 		log_rdma_mr(ERR, "ib_dma_map_sg num_pages=%x dir=%x rc=%x\n",
@@ -2310,7 +2333,7 @@ struct smbd_mr *smbd_register_mr(struct smbd_connection *info,
 	 * on IB_WR_REG_MR. Hardware enforces a barrier and order of execution
 	 * on the next ib_post_send when we actually send I/O to remote peer
 	 */
-	rc = ib_post_send(info->id->qp, &reg_wr->wr, NULL);
+	rc = ib_post_send(sc->ib.qp, &reg_wr->wr, NULL);
 	if (!rc)
 		return smbdirect_mr;
 
@@ -2319,7 +2342,7 @@ struct smbd_mr *smbd_register_mr(struct smbd_connection *info,
 
 	/* If all failed, attempt to recover this MR by setting it MR_ERROR*/
 map_mr_error:
-	ib_dma_unmap_sg(info->id->device, smbdirect_mr->sgt.sgl,
+	ib_dma_unmap_sg(sc->ib.dev, smbdirect_mr->sgt.sgl,
 			smbdirect_mr->sgt.nents, smbdirect_mr->dir);
 
 dma_map_error:
@@ -2357,6 +2380,7 @@ int smbd_deregister_mr(struct smbd_mr *smbdirect_mr)
 {
 	struct ib_send_wr *wr;
 	struct smbd_connection *info = smbdirect_mr->conn;
+	struct smbdirect_socket *sc = &info->socket;
 	int rc = 0;
 
 	if (smbdirect_mr->need_invalidate) {
@@ -2370,7 +2394,7 @@ int smbd_deregister_mr(struct smbd_mr *smbdirect_mr)
 		wr->send_flags = IB_SEND_SIGNALED;
 
 		init_completion(&smbdirect_mr->invalidate_done);
-		rc = ib_post_send(info->id->qp, wr, NULL);
+		rc = ib_post_send(sc->ib.qp, wr, NULL);
 		if (rc) {
 			log_rdma_mr(ERR, "ib_post_send failed rc=%x\n", rc);
 			smbd_disconnect_rdma_connection(info);
@@ -2387,7 +2411,7 @@ int smbd_deregister_mr(struct smbd_mr *smbdirect_mr)
 
 	if (smbdirect_mr->state == MR_INVALIDATED) {
 		ib_dma_unmap_sg(
-			info->id->device, smbdirect_mr->sgt.sgl,
+			sc->ib.dev, smbdirect_mr->sgt.sgl,
 			smbdirect_mr->sgt.nents,
 			smbdirect_mr->dir);
 		smbdirect_mr->state = MR_READY;
diff --git a/fs/smb/client/smbdirect.h b/fs/smb/client/smbdirect.h
index 4da0974ce7305..ffc38a48b6140 100644
--- a/fs/smb/client/smbdirect.h
+++ b/fs/smb/client/smbdirect.h
@@ -15,6 +15,8 @@
 #include <rdma/rdma_cm.h>
 #include <linux/mempool.h>
 
+#include "../common/smbdirect/smbdirect_socket.h"
+
 extern int rdma_readwrite_threshold;
 extern int smbd_max_frmr_depth;
 extern int smbd_keep_alive_interval;
@@ -50,14 +52,8 @@ enum smbd_connection_status {
  * 5. mempools for allocating packets
  */
 struct smbd_connection {
-	enum smbd_connection_status transport_status;
-
-	/* RDMA related */
-	struct rdma_cm_id *id;
-	struct ib_qp_init_attr qp_attr;
-	struct ib_pd *pd;
-	struct ib_cq *send_cq, *recv_cq;
-	struct ib_device_attr dev_attr;
+	struct smbdirect_socket socket;
+
 	int ri_rc;
 	struct completion ri_done;
 	wait_queue_head_t conn_wait;
-- 
2.39.5