cifs: smbd: Merge code to track pending packets

As an optimization, SMBD tries to track two types of packets: packets with
payload and without payload. There is no obvious benefit or performance gain
to separately track two types of packets.

Just treat them as pending packets and merge the tracking code.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 10 insertions, 30 deletions

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 8da43a500686..79d8dcbd0034 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -284,13 +284,9 @@ static void send_done(struct ib_cq *cq, struct ib_wc *wc)
 			request->sge[i].length,
 			DMA_TO_DEVICE);
 
-	if (request->has_payload) {
-		if (atomic_dec_and_test(&request->info->send_payload_pending))
-			wake_up(&request->info->wait_send_payload_pending);
-	} else {
-		if (atomic_dec_and_test(&request->info->send_pending))
-			wake_up(&request->info->wait_send_pending);
-	}
+	if (atomic_dec_and_test(&request->info->send_pending))
+		wake_up(&request->info->wait_send_pending);
+
 
 	mempool_free(request, request->info->request_mempool);
 }
@@ -749,7 +745,6 @@ static int smbd_post_send_negotiate_req(struct smbd_connection *info)
 		request->sge[0].addr,
 		request->sge[0].length, request->sge[0].lkey);
 
-	request->has_payload = false;
 	atomic_inc(&info->send_pending);
 	rc = ib_post_send(info->id->qp, &send_wr, NULL);
 	if (!rc)
@@ -919,7 +914,7 @@ static void smbd_destroy_header(struct smbd_connection *info,
 
 /* Post the send request */
 static int smbd_post_send(struct smbd_connection *info,
-		struct smbd_request *request, bool has_payload)
+		struct smbd_request *request)
 {
 	struct ib_send_wr send_wr;
 	int rc, i;
@@ -944,24 +939,13 @@ static int smbd_post_send(struct smbd_connection *info,
 	send_wr.opcode = IB_WR_SEND;
 	send_wr.send_flags = IB_SEND_SIGNALED;
 
-	if (has_payload) {
-		request->has_payload = true;
-		atomic_inc(&info->send_payload_pending);
-	} else {
-		request->has_payload = false;
-		atomic_inc(&info->send_pending);
-	}
+	atomic_inc(&info->send_pending);
 
 	rc = ib_post_send(info->id->qp, &send_wr, NULL);
 	if (rc) {
 		log_rdma_send(ERR, "ib_post_send failed rc=%d\n", rc);
-		if (has_payload) {
-			if (atomic_dec_and_test(&info->send_payload_pending))
-				wake_up(&info->wait_send_payload_pending);
-		} else {
-			if (atomic_dec_and_test(&info->send_pending))
-				wake_up(&info->wait_send_pending);
-		}
+		if (atomic_dec_and_test(&info->send_pending))
+			wake_up(&info->wait_send_pending);
 		smbd_disconnect_rdma_connection(info);
 		rc = -EAGAIN;
 	} else
@@ -1001,7 +985,7 @@ static int smbd_post_send_sgl(struct smbd_connection *info,
 		request->num_sge++;
 	}
 
-	rc = smbd_post_send(info, request, data_length);
+	rc = smbd_post_send(info, request);
 	if (!rc)
 		return 0;
 
@@ -1413,8 +1397,6 @@ void smbd_destroy(struct TCP_Server_Info *server)
 	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");
@@ -1751,8 +1733,6 @@ static struct smbd_connection *_smbd_get_connection(
 	init_waitqueue_head(&info->wait_send_pending);
 	atomic_set(&info->send_pending, 0);
 
-	init_waitqueue_head(&info->wait_send_payload_pending);
-	atomic_set(&info->send_payload_pending, 0);
 
 	INIT_WORK(&info->disconnect_work, smbd_disconnect_rdma_work);
 	INIT_WORK(&info->post_send_credits_work, smbd_post_send_credits);
@@ -2226,8 +2206,8 @@ done:
 	 * that means all the I/Os have been out and we are good to return
 	 */
 
-	wait_event(info->wait_send_payload_pending,
-		atomic_read(&info->send_payload_pending) == 0);
+	wait_event(info->wait_send_pending,
+		atomic_read(&info->send_pending) == 0);
 
 	return rc;
 }