diff options
| -rw-r--r-- | src/vnet/devices/tap/tap.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c index bc790adae75..a1d5981086c 100644 --- a/src/vnet/devices/tap/tap.c +++ b/src/vnet/devices/tap/tap.c @@ -94,6 +94,7 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) struct vhost_memory *vhost_mem = 0; virtio_if_t *vif = 0; clib_error_t *err = 0; + unsigned int tap_features; int fd = -1; char *host_if_name = 0; @@ -173,6 +174,14 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) goto error; } + _IOCTL (vif->tap_fd, TUNGETFEATURES, &tap_features); + if ((tap_features & IFF_VNET_HDR) == 0) + { + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return (0, "vhost-net backend not available"); + goto error; + } + ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE | IFF_VNET_HDR; _IOCTL (vif->tap_fd, TUNSETIFF, (void *) &ifr); vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name); |