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tap: add check for vhost-net backend

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Type: feature

Change-Id: I402f4c88dee70fbb0b3b61dc4e0a4034d24d8b56
Signed-off-by: Damjan Marion <damarion@cisco.com>
This commit is contained in:
Damjan Marion
2019-11-08 13:52:28 +01:00
committed by Florin Coras
parent 0ba86cb1bd
commit 39807d02c9
1 changed files with 9 additions and 0 deletions
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9
src/vnet/devices/tap/tap.c
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@ -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);