-/*-
- * 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>
#include <sys/stat.h>
#include <fcntl.h>
#include <net/if.h>
+#include <net/if_arp.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
+#include <rte_ether.h>
+
#include "vhost_kernel_tap.h"
#include "../virtio_logs.h"
+#include "../virtio_pci.h"
+
+static int
+vhost_kernel_tap_set_offload(int fd, uint64_t features)
+{
+ unsigned int offload = 0;
+
+ if (features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
+ offload |= TUN_F_CSUM;
+ if (features & (1ULL << VIRTIO_NET_F_GUEST_TSO4))
+ offload |= TUN_F_TSO4;
+ if (features & (1ULL << VIRTIO_NET_F_GUEST_TSO6))
+ offload |= TUN_F_TSO6;
+ if (features & ((1ULL << VIRTIO_NET_F_GUEST_TSO4) |
+ (1ULL << VIRTIO_NET_F_GUEST_TSO6)) &&
+ (features & (1ULL << VIRTIO_NET_F_GUEST_ECN)))
+ offload |= TUN_F_TSO_ECN;
+ if (features & (1ULL << VIRTIO_NET_F_GUEST_UFO))
+ offload |= TUN_F_UFO;
+ }
+
+ if (offload != 0) {
+ /* Check if our kernel supports TUNSETOFFLOAD */
+ if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) {
+ PMD_DRV_LOG(ERR, "Kernel does't support TUNSETOFFLOAD\n");
+ return -ENOTSUP;
+ }
+
+ if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+ offload &= ~TUN_F_UFO;
+ if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+ PMD_DRV_LOG(ERR, "TUNSETOFFLOAD ioctl() failed: %s\n",
+ strerror(errno));
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
int
-vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq)
+vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
+ const char *mac, uint64_t features)
{
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
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;
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));
+ vhost_kernel_tap_set_offload(tapfd, features);
+
+ memset(&ifr, 0, sizeof(ifr));
+ ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+ memcpy(ifr.ifr_hwaddr.sa_data, mac, ETHER_ADDR_LEN);
+ if (ioctl(tapfd, SIOCSIFHWADDR, (void *)&ifr) == -1) {
+ PMD_DRV_LOG(ERR, "SIOCSIFHWADDR failed: %s", strerror(errno));
+ goto error;
+ }
if (!(*p_ifname))
*p_ifname = strdup(ifr.ifr_name);
Code Review / deb_dpdk.git / blobdiff