From c99b4cd1c3aae9ca3bda0595a5cce4ea5e6ba84f Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 4 Dec 2017 15:25:58 +0100 Subject: tap_v2: move code to vnet/devices/tap virtio backend stays in vnet/devices/virtio Change-Id: Idbf04f1c645a809ed408670ba330662859fe9309 Signed-off-by: Damjan Marion --- src/vnet/devices/virtio/tap.c | 352 ------------------------------------------ 1 file changed, 352 deletions(-) delete mode 100644 src/vnet/devices/virtio/tap.c (limited to 'src/vnet/devices/virtio/tap.c') diff --git a/src/vnet/devices/virtio/tap.c b/src/vnet/devices/virtio/tap.c deleted file mode 100644 index 0eaaf2771cc..00000000000 --- a/src/vnet/devices/virtio/tap.c +++ /dev/null @@ -1,352 +0,0 @@ -/* - *------------------------------------------------------------------ - * Copyright (c) 2017 Cisco and/or its affiliates. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - *------------------------------------------------------------------ - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -#define _IOCTL(fd,a,...) \ - if (ioctl (fd, a, __VA_ARGS__) < 0) \ - { \ - err = clib_error_return_unix (0, "ioctl(" #a ")"); \ - goto error; \ - } - -static u32 -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; -} - -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, fd = -1; - struct ifreq ifr; - size_t hdrsz; - struct vhost_memory *vhost_mem = 0; - virtio_if_t *vif = 0; - clib_error_t *err = 0; - - memset (&ifr, 0, sizeof (ifr)); - pool_get (vim->interfaces, vif); - vif->dev_instance = vif - vim->interfaces; - vif->tap_fd = -1; - - if ((vif->fd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0) - { - args->rv = VNET_API_ERROR_SYSCALL_ERROR_1; - args->error = clib_error_return_unix (0, "open '/dev/vhost-net'"); - goto error; - } - - _IOCTL (vif->fd, VHOST_GET_FEATURES, &vif->remote_features); - - if ((vif->remote_features & (1ULL << VIRTIO_NET_F_MRG_RXBUF)) == 0) - { - 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) - { - 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) - { - 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; - } - - vif->features |= 1ULL << VIRTIO_NET_F_MRG_RXBUF; - vif->features |= 1ULL << VIRTIO_F_VERSION_1; - vif->features |= 1ULL << VIRTIO_RING_F_INDIRECT_DESC; - - _IOCTL (vif->fd, VHOST_SET_FEATURES, &vif->features); - - if ((vif->tap_fd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0) - { - args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; - args->error = clib_error_return_unix (0, "open '/dev/net/tun'"); - goto error; - } - - 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); - - unsigned int offload = 0; - hdrsz = sizeof (struct virtio_net_hdr_v1); - _IOCTL (vif->tap_fd, TUNSETOFFLOAD, offload); - _IOCTL (vif->tap_fd, TUNSETVNETHDRSZ, &hdrsz); - _IOCTL (vif->fd, VHOST_SET_OWNER, 0); - - if (args->host_bridge) - { - int master_ifindex = if_nametoindex ((char *) args->host_bridge); - args->error = vnet_netlink_set_if_master (vif->ifindex, master_ifindex); - if (args->error) - { - 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; - } - } - - /* Set vhost memory table */ - i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region); - vhost_mem = clib_mem_alloc (i); - memset (vhost_mem, 0, i); - vhost_mem->nregions = 1; - vhost_mem->regions[0].memory_size = (1ULL << 47) - 4096; - _IOCTL (vif->fd, VHOST_SET_MEM_TABLE, vhost_mem); - - if ((args->error = virtio_vring_init (vm, vif, 0, args->rx_ring_sz))) - { - args->rv = VNET_API_ERROR_INIT_FAILED; - goto error; - } - - if ((args->error = virtio_vring_init (vm, vif, 1, args->tx_ring_sz))) - { - 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); - } - - if (!args->hw_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; - } - vif->name = args->name; - args->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->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; - args->sw_if_index = vif->sw_if_index; - hw = vnet_get_hw_interface (vnm, vif->hw_if_index); - hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE; - vnet_hw_interface_set_input_node (vnm, vif->hw_if_index, - virtio_input_node.index); - vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, 0, ~0); - vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, 0, - VNET_HW_INTERFACE_RX_MODE_DEFAULT); - vif->per_interface_next_index = ~0; - vif->type = VIRTIO_IF_TYPE_TAP; - vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP; - vnet_hw_interface_set_flags (vnm, vif->hw_if_index, - VNET_HW_INTERFACE_FLAG_LINK_UP); - 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) - close (vif->fd); - vec_foreach_index (i, vif->vrings) virtio_vring_free (vif, i); - memset (vif, 0, sizeof (virtio_if_t)); - pool_put (vim->interfaces, vif); - -done: - if (vhost_mem) - clib_mem_free (vhost_mem); - if (fd != -1) - close (fd); -} - -int -tap_delete_if (vlib_main_t * vm, u32 sw_if_index) -{ - vnet_main_t *vnm = vnet_get_main (); - virtio_main_t *mm = &virtio_main; - int i; - virtio_if_t *vif; - vnet_hw_interface_t *hw; - - hw = vnet_get_sup_hw_interface (vnm, sw_if_index); - if (hw == NULL || virtio_device_class.index != hw->dev_class_index) - return VNET_API_ERROR_INVALID_SW_IF_INDEX; - - vif = pool_elt_at_index (mm->interfaces, hw->dev_instance); - - /* bring down the interface */ - vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0); - vnet_sw_interface_set_flags (vnm, vif->sw_if_index, 0); - - ethernet_delete_interface (vnm, vif->hw_if_index); - vif->hw_if_index = ~0; - - if (vif->tap_fd != -1) - close (vif->tap_fd); - if (vif->fd != -1) - close (vif->fd); - - vec_foreach_index (i, vif->vrings) virtio_vring_free (vif, i); - vec_free (vif->vrings); - - memset (vif, 0, sizeof (*vif)); - pool_put (mm->interfaces, vif); - - return 0; -} - -int -tap_dump_ifs (tap_interface_details_t ** out_tapids) -{ - vnet_main_t *vnm = vnet_get_main (); - virtio_main_t *mm = &virtio_main; - virtio_if_t *vif; - vnet_hw_interface_t *hi; - tap_interface_details_t *r_tapids = NULL; - tap_interface_details_t *tapid = NULL; - - /* *INDENT-OFF* */ - pool_foreach (vif, mm->interfaces, - vec_add2(r_tapids, tapid, 1); - memset (tapid, 0, sizeof (*tapid)); - tapid->sw_if_index = vif->sw_if_index; - hi = vnet_get_hw_interface (vnm, vif->hw_if_index); - clib_memcpy(tapid->dev_name, hi->name, - MIN (ARRAY_LEN (tapid->dev_name) - 1, - strlen ((const char *) hi->name))); - ); - /* *INDENT-ON* */ - - *out_tapids = r_tapids; - - return 0; -} - -static clib_error_t * -tap_init (vlib_main_t * vm) -{ - - return 0; -} - -VLIB_INIT_FUNCTION (tap_init); - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg