aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/devices/virtio/tap.c
diff options
context:
space:
mode:
authorDamjan Marion <damarion@cisco.com>2017-12-01 13:34:24 +0100
committerDamjan Marion <dmarion.lists@gmail.com>2017-12-02 10:11:25 +0000
commit91c6ef7cae2d20ca17a69003a44090614412c63f (patch)
tree28a0ae8030e840a0bc8f65e28f9d5bc2868bf39d /src/vnet/devices/virtio/tap.c
parent9fa1581cc40b656b6e00d77479fc2424cd50a126 (diff)
tap_v2: multiple improvements
- add support for assigning tap interface to the bridge - add support for assigning tap interface host side ip4 and ip6 address - host namespace can be specified as PID (pid:12345) or full path to file - automatically bring linux interface up Change-Id: I1cf7c3cad9a740e430cc1b9c2bb0aad0ba4cc8d8 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/devices/virtio/tap.c')
-rw-r--r--src/vnet/devices/virtio/tap.c120
1 files changed, 92 insertions, 28 deletions
diff --git a/src/vnet/devices/virtio/tap.c b/src/vnet/devices/virtio/tap.c
index 34339c95737..cc28df3be7f 100644
--- a/src/vnet/devices/virtio/tap.c
+++ b/src/vnet/devices/virtio/tap.c
@@ -31,6 +31,8 @@
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
#include <vnet/devices/netlink.h>
#include <vnet/devices/virtio/virtio.h>
#include <vnet/devices/virtio/tap.h>
@@ -47,23 +49,23 @@ virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
u32 flags)
{
/* nothing for now */
+ //TODO On MTU change call vnet_netlink_set_if_mtu
return 0;
}
-int
+void
tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *vim = &virtio_main;
vnet_sw_interface_t *sw;
vnet_hw_interface_t *hw;
- int i;
- clib_error_t *err = 0;
+ int i, fd;
struct ifreq ifr;
size_t hdrsz;
struct vhost_memory *vhost_mem = 0;
virtio_if_t *vif = 0;
- int rv = 0;
+ clib_error_t *err = 0;
memset (&ifr, 0, sizeof (ifr));
pool_get (vim->interfaces, vif);
@@ -72,7 +74,8 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
if ((vif->fd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
{
- rv = VNET_API_ERROR_SYSCALL_ERROR_1;
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
+ args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
goto error;
}
@@ -80,19 +83,25 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
if ((vif->remote_features & (1ULL << VIRTIO_NET_F_MRG_RXBUF)) == 0)
{
- rv = VNET_API_ERROR_UNSUPPORTED;
+ args->rv = VNET_API_ERROR_UNSUPPORTED;
+ args->error = clib_error_return (0, "vhost-net backend doesn't support "
+ "VIRTIO_NET_F_MRG_RXBUF feature");
goto error;
}
if ((vif->remote_features & (1ULL << VIRTIO_RING_F_INDIRECT_DESC)) == 0)
{
- rv = VNET_API_ERROR_UNSUPPORTED;
+ args->rv = VNET_API_ERROR_UNSUPPORTED;
+ args->error = clib_error_return (0, "vhost-net backend doesn't support "
+ "VIRTIO_RING_F_INDIRECT_DESC feature");
goto error;
}
if ((vif->remote_features & (1ULL << VIRTIO_F_VERSION_1)) == 0)
{
- rv = VNET_API_ERROR_UNSUPPORTED;
+ args->rv = VNET_API_ERROR_UNSUPPORTED;
+ args->error = clib_error_return (0, "vhost-net backend doesn't support "
+ "VIRTIO_F_VERSION_1 features");
goto error;
}
@@ -104,7 +113,8 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
if ((vif->tap_fd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
{
- rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
goto error;
}
@@ -120,13 +130,49 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
_IOCTL (vif->tap_fd, TUNSETVNETHDRSZ, &hdrsz);
_IOCTL (vif->fd, VHOST_SET_OWNER, 0);
- if (args->net_ns)
+ if (args->host_bridge)
{
- err = vnet_netlink_set_if_namespace (vif->ifindex,
- (char *) args->net_ns);
- if (err)
+ int master_ifindex = if_nametoindex ((char *) args->host_bridge);
+ args->error = vnet_netlink_set_if_master (vif->ifindex, master_ifindex);
+ if (args->error)
{
- rv = VNET_API_ERROR_NAMESPACE_CREATE;
+ args->rv = VNET_API_ERROR_NETLINK_ERROR;
+ goto error;
+ }
+ }
+
+ if (args->host_namespace)
+ {
+ args->error = vnet_netlink_set_if_namespace (vif->ifindex,
+ (char *)
+ args->host_namespace);
+ if (args->error)
+ {
+ args->rv = VNET_API_ERROR_NETLINK_ERROR;
+ goto error;
+ }
+ }
+
+ if (args->host_ip4_prefix_len)
+ {
+ args->error = vnet_netlink_add_ip4_addr (vif->ifindex,
+ &args->host_ip4_addr,
+ args->host_ip4_prefix_len);
+ if (args->error)
+ {
+ args->rv = VNET_API_ERROR_NETLINK_ERROR;
+ goto error;
+ }
+ }
+
+ if (args->host_ip6_prefix_len)
+ {
+ args->error = vnet_netlink_add_ip6_addr (vif->ifindex,
+ &args->host_ip6_addr,
+ args->host_ip6_prefix_len);
+ if (args->error)
+ {
+ args->rv = VNET_API_ERROR_NETLINK_ERROR;
goto error;
}
}
@@ -139,18 +185,29 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
vhost_mem->regions[0].memory_size = (1ULL << 47) - 4096;
_IOCTL (vif->fd, VHOST_SET_MEM_TABLE, vhost_mem);
- if ((err = virtio_vring_init (vm, vif, 0, args->rx_ring_sz)))
+ if ((args->error = virtio_vring_init (vm, vif, 0, args->rx_ring_sz)))
{
- rv = VNET_API_ERROR_VIRTIO_INIT;
+ args->rv = VNET_API_ERROR_INIT_FAILED;
goto error;
}
- if ((err = virtio_vring_init (vm, vif, 1, args->tx_ring_sz)))
+ if ((args->error = virtio_vring_init (vm, vif, 1, args->tx_ring_sz)))
{
- rv = VNET_API_ERROR_VIRTIO_INIT;
+ args->rv = VNET_API_ERROR_INIT_FAILED;
goto error;
}
+ /* set host side up */
+ if ((fd = socket (AF_INET, SOCK_STREAM, 0)) > 0)
+ {
+ memset (&ifr, 0, sizeof (struct ifreq));
+ strncpy (ifr.ifr_name, (char *) args->name, sizeof (ifr.ifr_name) - 1);
+ _IOCTL (fd, SIOCGIFFLAGS, (void *) &ifr);
+ ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
+ _IOCTL (fd, SIOCSIFFLAGS, (void *) &ifr);
+ close (fd);
+ }
+
if (!args->hw_addr_set)
{
f64 now = vlib_time_now (vm);
@@ -164,14 +221,17 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
}
vif->name = args->name;
args->name = 0;
- vif->net_ns = args->net_ns;
- args->net_ns = 0;
- err = ethernet_register_interface (vnm, virtio_device_class.index,
- vif->dev_instance, args->hw_addr,
- &vif->hw_if_index,
- virtio_eth_flag_change);
- if (err)
- rv = VNET_API_ERROR_INVALID_REGISTRATION;
+ vif->net_ns = args->host_namespace;
+ args->host_namespace = 0;
+ args->error = ethernet_register_interface (vnm, virtio_device_class.index,
+ vif->dev_instance, args->hw_addr,
+ &vif->hw_if_index,
+ virtio_eth_flag_change);
+ if (args->error)
+ {
+ args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
+ goto error;
+ }
sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
vif->sw_if_index = sw->sw_if_index;
@@ -191,6 +251,12 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
goto done;
error:
+ if (err)
+ {
+ ASSERT (args->error == 0);
+ args->error = err;
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
+ }
if (vif->tap_fd != -1)
close (vif->tap_fd);
if (vif->fd != -1)
@@ -202,8 +268,6 @@ error:
done:
if (vhost_mem)
clib_mem_free (vhost_mem);
-
- return rv;
}
int