diff options
| author |   Damjan Marion <damarion@cisco.com> | 2019-11-08 13:52:28 +0100 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2019-11-08 18:11:24 +0000 |
| commit | 39807d02c9a26d99f96a9669c49ba017bedfe510 (patch) | |
| tree | 7593d8ee325d4b33873e6dce2b3807d0d924909c /src/vnet/devices/tap/tap.c | |
| parent | 0ba86cb1bdcc273ebc3d5a92f765639a64894a7a (diff) | |
tap: add check for vhost-net backend
Type: feature
Change-Id: I402f4c88dee70fbb0b3b61dc4e0a4034d24d8b56
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/devices/tap/tap.c')
| -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); |