drivers/net: build Intel NIC PMDs with meson

[dpdk.git] / drivers / net / virtio / virtio_user / vhost_kernel_tap.c

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
index 797713b..1a47a34 100644 (file)
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
@@ -1,34 +1,5 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright(c) 2016 Intel Corporation. All rights reserved.
- *   All rights reserved.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of Intel Corporation nor the names of its
- *       contributors may be used to endorse or promote products derived
- *       from this software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016 Intel Corporation
  */
 
 #include <unistd.h>
@@ -44,12 +15,18 @@
 #include "../virtio_logs.h"
 
 int
-vhost_kernel_open_tap(char **p_ifname, int hdr_size)
+vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq)
 {
        unsigned int tap_features;
        int sndbuf = INT_MAX;
        struct ifreq ifr;
        int tapfd;
+       unsigned int offload =
+                       TUN_F_CSUM |
+                       TUN_F_TSO4 |
+                       TUN_F_TSO6 |
+                       TUN_F_TSO_ECN |
+                       TUN_F_UFO;
 
        /* TODO:
         * 1. verify we can get/set vnet_hdr_len, tap_probe_vnet_hdr_len
@@ -85,10 +62,13 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size)
                goto error;
        }
 
+       if (req_mq)
+               ifr.ifr_flags |= IFF_MULTI_QUEUE;
+
        if (*p_ifname)
-               strncpy(ifr.ifr_name, *p_ifname, IFNAMSIZ);
+               strncpy(ifr.ifr_name, *p_ifname, IFNAMSIZ - 1);
        else
-               strncpy(ifr.ifr_name, "tap%d", IFNAMSIZ);
+               strncpy(ifr.ifr_name, "tap%d", IFNAMSIZ - 1);
        if (ioctl(tapfd, TUNSETIFF, (void *)&ifr) == -1) {
                PMD_DRV_LOG(ERR, "TUNSETIFF failed: %s", strerror(errno));
                goto error;
@@ -106,6 +86,14 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size)
                goto error;
        }
 
+       /* TODO: before set the offload capabilities, we'd better (1) check
+        * negotiated features to see if necessary to offload; (2) query tap
+        * to see if it supports the offload capabilities.
+        */
+       if (ioctl(tapfd, TUNSETOFFLOAD, offload) != 0)
+               PMD_DRV_LOG(ERR, "TUNSETOFFLOAD ioctl() failed: %s",
+                          strerror(errno));
+
        if (!(*p_ifname))
                *p_ifname = strdup(ifr.ifr_name);