#include "vhost_kernel_tap.h"
#include "../virtio_logs.h"
-#include "../virtio_pci.h"
+#include "../virtio.h"
-static int
+
+int
+tap_support_features(unsigned int *tap_features)
+{
+ int tapfd;
+
+ tapfd = open(PATH_NET_TUN, O_RDWR);
+ if (tapfd < 0) {
+ PMD_DRV_LOG(ERR, "fail to open %s: %s",
+ PATH_NET_TUN, strerror(errno));
+ return -1;
+ }
+
+ if (ioctl(tapfd, TUNGETFEATURES, tap_features) == -1) {
+ PMD_DRV_LOG(ERR, "TUNGETFEATURES failed: %s", strerror(errno));
+ close(tapfd);
+ return -1;
+ }
+
+ close(tapfd);
+ return 0;
+}
+
+int
vhost_kernel_tap_set_offload(int fd, uint64_t features)
{
unsigned int offload = 0;
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;
- }
+ /* Check if our kernel supports TUNSETOFFLOAD */
+ if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) {
+ PMD_DRV_LOG(ERR, "Kernel doesn't support TUNSETOFFLOAD\n");
+ return -ENOTSUP;
+ }
+ if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+ offload &= ~TUN_F_UFO;
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;
- }
+ PMD_DRV_LOG(ERR, "TUNSETOFFLOAD ioctl() failed: %s\n",
+ strerror(errno));
+ return -1;
}
}
return 0;
}
+int
+vhost_kernel_tap_set_queue(int fd, bool attach)
+{
+ struct ifreq ifr = {
+ .ifr_flags = attach ? IFF_ATTACH_QUEUE : IFF_DETACH_QUEUE,
+ };
+
+ return ioctl(fd, TUNSETQUEUE, &ifr);
+}
+
int
vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
const char *mac, uint64_t features)
int sndbuf = INT_MAX;
struct ifreq ifr;
int tapfd;
+ int ret;
/* TODO:
* 1. verify we can get/set vnet_hdr_len, tap_probe_vnet_hdr_len
goto error;
}
- fcntl(tapfd, F_SETFL, O_NONBLOCK);
+ if (fcntl(tapfd, F_SETFL, O_NONBLOCK) < 0) {
+ PMD_DRV_LOG(ERR, "fcntl tapfd failed: %s", strerror(errno));
+ goto error;
+ }
if (ioctl(tapfd, TUNSETVNETHDRSZ, &hdr_size) < 0) {
PMD_DRV_LOG(ERR, "TUNSETVNETHDRSZ failed: %s", strerror(errno));
goto error;
}
- vhost_kernel_tap_set_offload(tapfd, features);
+ ret = vhost_kernel_tap_set_offload(tapfd, features);
+ if (ret < 0 && ret != -ENOTSUP)
+ goto error;
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;