*------------------------------------------------------------------
*/
+#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/virtio_net.h>
#include <linux/vhost.h>
#include <sys/eventfd.h>
+#include <sched.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <vnet/devices/virtio/virtio.h>
#include <vnet/devices/tap/tap.h>
+tap_main_t tap_main;
+
#define _IOCTL(fd,a,...) \
if (ioctl (fd, a, __VA_ARGS__) < 0) \
{ \
return 0;
}
+static int
+open_netns_fd (char *netns)
+{
+ u8 *s = 0;
+ int fd;
+
+ if (strncmp (netns, "pid:", 4) == 0)
+ s = format (0, "/proc/%u/ns/net%c", atoi (netns + 4), 0);
+ else if (netns[0] == '/')
+ s = format (0, "%s%c", netns, 0);
+ else
+ s = format (0, "/var/run/netns/%s%c", netns, 0);
+
+ fd = open ((char *) s, O_RDONLY);
+ vec_free (s);
+ return fd;
+}
+
+
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;
+ tap_main_t *tm = &tap_main;
vnet_sw_interface_t *sw;
vnet_hw_interface_t *hw;
int i, fd = -1;
+ int old_netns_fd = -1;
struct ifreq ifr;
size_t hdrsz;
struct vhost_memory *vhost_mem = 0;
virtio_if_t *vif = 0;
clib_error_t *err = 0;
+ uword *p;
+
+ if (args->id != ~0)
+ {
+ p = hash_get (tm->dev_instance_by_interface_id, args->id);
+ if (p)
+ {
+ args->rv = VNET_API_ERROR_INVALID_INTERFACE;
+ args->error = clib_error_return (0, "interface already exists");
+ return;
+ }
+ }
+ else
+ {
+ int tries = 1000;
+ while (--tries)
+ {
+ args->id = tm->last_used_interface_id++;
+ p = hash_get (tm->dev_instance_by_interface_id, args->id);
+ if (!p)
+ break;
+ }
+
+ if (!tries)
+ {
+ args->rv = VNET_API_ERROR_UNSPECIFIED;
+ args->error =
+ clib_error_return (0, "cannot find free interface id");
+ return;
+ }
+ }
memset (&ifr, 0, sizeof (ifr));
pool_get (vim->interfaces, vif);
vif->dev_instance = vif - vim->interfaces;
vif->tap_fd = -1;
+ vif->id = args->id;
+
+ hash_set (tm->dev_instance_by_interface_id, vif->id, vif->dev_instance);
if ((vif->fd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
{
}
ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE | IFF_VNET_HDR;
- strncpy (ifr.ifr_ifrn.ifrn_name, (char *) args->name, IF_NAMESIZE - 1);
_IOCTL (vif->tap_fd, TUNSETIFF, (void *) &ifr);
-
- vif->ifindex = if_nametoindex ((char *) args->name);
+ vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name);
unsigned int offload = 0;
hdrsz = sizeof (struct virtio_net_hdr_v1);
_IOCTL (vif->tap_fd, TUNSETVNETHDRSZ, &hdrsz);
_IOCTL (vif->fd, VHOST_SET_OWNER, 0);
- if (args->host_bridge)
+ /* if namespace is specified, all further netlink messages should be excuted
+ after we change our net namespace */
+ if (args->host_namespace)
{
- int master_ifindex = if_nametoindex ((char *) args->host_bridge);
- args->error = vnet_netlink_set_if_master (vif->ifindex, master_ifindex);
+ int fd;
+ old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
+ if ((fd = open_netns_fd ((char *) args->host_namespace)) == -1)
+ {
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
+ args->host_namespace);
+ goto error;
+ }
+ args->error = vnet_netlink_set_link_netns (vif->ifindex, fd,
+ (char *) args->host_if_name);
if (args->error)
{
args->rv = VNET_API_ERROR_NETLINK_ERROR;
goto error;
}
+ if (setns (fd, CLONE_NEWNET) == -1)
+ {
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
+ args->error = clib_error_return_unix (0, "setns '%s'",
+ args->host_namespace);
+ goto error;
+ }
+ close (fd);
+ if ((vif->ifindex = if_nametoindex ((char *) args->host_if_name)) == 0)
+ {
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
+ args->error = clib_error_return_unix (0, "if_nametoindex '%s'",
+ args->host_if_name);
+ goto error;
+ }
+ }
+ else
+ {
+ if (args->host_if_name)
+ {
+ args->error = vnet_netlink_set_link_name (vif->ifindex,
+ (char *)
+ args->host_if_name);
+ if (args->error)
+ {
+ args->rv = VNET_API_ERROR_NETLINK_ERROR;
+ goto error;
+ }
+ }
}
- if (args->host_namespace)
+ if (!ethernet_mac_address_is_zero (args->host_mac_addr))
{
- args->error = vnet_netlink_set_if_namespace (vif->ifindex,
- (char *)
- args->host_namespace);
+ args->error = vnet_netlink_set_link_addr (vif->ifindex,
+ args->host_mac_addr);
if (args->error)
{
args->rv = VNET_API_ERROR_NETLINK_ERROR;
}
}
+ if (args->host_bridge)
+ {
+ args->error = vnet_netlink_set_link_master (vif->ifindex,
+ (char *) args->host_bridge);
+ 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->error = vnet_netlink_set_link_state (vif->ifindex, 1 /* UP */ );
+ if (args->error)
+ {
+ args->rv = VNET_API_ERROR_NETLINK_ERROR;
+ goto error;
+ }
+
+ /* switch back to old net namespace */
+ if (args->host_namespace)
+ {
+ if (setns (old_netns_fd, CLONE_NEWNET) == -1)
+ {
+ args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
+ args->error = clib_error_return_unix (0, "setns '%s'",
+ args->host_namespace);
+ goto error;
+ }
+ }
+
/* Set vhost memory table */
i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region);
vhost_mem = clib_mem_alloc (i);
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);
- }
-
- if (!args->hw_addr_set)
+ if (!args->mac_addr_set)
{
f64 now = vlib_time_now (vm);
u32 rnd;
rnd = (u32) (now * 1e6);
rnd = random_u32 (&rnd);
- memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
- args->hw_addr[0] = 2;
- args->hw_addr[1] = 0xfe;
+ memcpy (args->mac_addr + 2, &rnd, sizeof (rnd));
+ args->mac_addr[0] = 2;
+ args->mac_addr[1] = 0xfe;
}
- vif->name = args->name;
- args->name = 0;
+ vif->host_if_name = args->host_if_name;
+ args->host_if_name = 0;
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->dev_instance,
+ args->mac_addr,
&vif->hw_if_index,
virtio_eth_flag_change);
if (args->error)
{
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *mm = &virtio_main;
+ tap_main_t *tm = &tap_main;
int i;
virtio_if_t *vif;
vnet_hw_interface_t *hw;
vec_foreach_index (i, vif->vrings) virtio_vring_free (vif, i);
vec_free (vif->vrings);
+ hash_unset (tm->dev_instance_by_interface_id, vif->id);
memset (vif, 0, sizeof (*vif));
pool_put (mm->interfaces, vif);
static clib_error_t *
tap_init (vlib_main_t * vm)
{
-
+ tap_main_t *tm = &tap_main;
+ tm->dev_instance_by_interface_id = hash_create (0, sizeof (uword));
return 0;
}
Code Review / vpp.git / blobdiff