X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fdevices%2Ftap%2Ftap.c;h=b65879c42fc7ffcfc87a6a83eb41f21236772d45;hb=a6c34a19d;hp=d3ed2af18fd6043cd5566426d62ce9b8b2d4eca3;hpb=a23b615aa4b7bf1eee6ad099f41c3c8f1c85d723;p=vpp.git diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c index d3ed2af18fd..b65879c42fc 100644 --- a/src/vnet/devices/tap/tap.c +++ b/src/vnet/devices/tap/tap.c @@ -18,19 +18,23 @@ #define _GNU_SOURCE #include #include +#include #include #include #include #include -#include -#include +#include +#include #include +#include #include +#include #include #include #include +#include #include #include #include @@ -41,13 +45,27 @@ tap_main_t tap_main; +#define tap_log_err(dev, f, ...) \ + vlib_log (VLIB_LOG_LEVEL_ERR, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__) +#define tap_log_dbg(dev, f, ...) \ + vlib_log (VLIB_LOG_LEVEL_DEBUG, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__) + #define _IOCTL(fd,a,...) \ if (ioctl (fd, a, __VA_ARGS__) < 0) \ { \ err = clib_error_return_unix (0, "ioctl(" #a ")"); \ + tap_log_err (vif, "%U", format_clib_error, err); \ goto error; \ } + /* *INDENT-OFF* */ +VNET_HW_INTERFACE_CLASS (tun_device_hw_interface_class, static) = +{ + .name = "tun-device", + .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, +}; + /* *INDENT-ON* */ + static u32 virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags) @@ -77,22 +95,67 @@ open_netns_fd (char *netns) #define TAP_MAX_INSTANCE 1024 +static void +tap_free (vlib_main_t * vm, virtio_if_t * vif) +{ + virtio_main_t *mm = &virtio_main; + tap_main_t *tm = &tap_main; + clib_error_t *err = 0; + int i; + + /* *INDENT-OFF* */ + vec_foreach_index (i, vif->vhost_fds) if (vif->vhost_fds[i] != -1) + close (vif->vhost_fds[i]); + vec_foreach_index (i, vif->rxq_vrings) + virtio_vring_free_rx (vm, vif, RX_QUEUE (i)); + vec_foreach_index (i, vif->txq_vrings) + virtio_vring_free_tx (vm, vif, TX_QUEUE (i)); + /* *INDENT-ON* */ + + if (vif->tap_fds) + { + _IOCTL (vif->tap_fds[0], TUNSETPERSIST, (void *) (uintptr_t) 0); + tap_log_dbg (vif, "TUNSETPERSIST: unset"); + } +error: + vec_foreach_index (i, vif->tap_fds) close (vif->tap_fds[i]); + + vec_free (vif->vhost_fds); + vec_free (vif->rxq_vrings); + vec_free (vif->txq_vrings); + vec_free (vif->host_if_name); + vec_free (vif->net_ns); + vec_free (vif->host_bridge); + clib_error_free (vif->error); + + tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 0); + clib_memset (vif, 0, sizeof (*vif)); + pool_put (mm->interfaces, vif); +} + void tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) { - vnet_main_t *vnm = vnet_get_main (); vlib_thread_main_t *thm = vlib_get_thread_main (); + vlib_physmem_main_t *vpm = &vm->physmem_main; + 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; + int i, num_vhost_queues; int old_netns_fd = -1; - struct ifreq ifr; + struct ifreq ifr = {.ifr_flags = IFF_NO_PI | IFF_VNET_HDR }; + struct ifreq get_ifr = {.ifr_flags = 0 }; size_t hdrsz; - struct vhost_memory *vhost_mem = 0; + vhost_memory_t *vhost_mem = 0; virtio_if_t *vif = 0; clib_error_t *err = 0; + unsigned int tap_features; + int tfd = -1, qfd = -1, vfd = -1, nfd = -1; + char *host_if_name = 0; + unsigned int offload = 0; + int sndbuf = 0; if (args->id != ~0) { @@ -115,111 +178,281 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) 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; + pool_get_zero (vim->interfaces, vif); - if ((vif->fd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0) + if (args->tap_flags & TAP_FLAG_TUN) { - args->rv = VNET_API_ERROR_SYSCALL_ERROR_1; - args->error = clib_error_return_unix (0, "open '/dev/vhost-net'"); - goto error; + vif->type = VIRTIO_IF_TYPE_TUN; + ifr.ifr_flags |= IFF_TUN; + + /* + * From kernel 4.20, xdp support has been added in tun_sendmsg. + * If sndbuf == INT_MAX, vhost batches the packet and processes + * them using xdp data path for tun driver. It assumes packets + * are ethernet frames (It needs to be fixed). + * To avoid xdp data path in tun driver, sndbuf value should + * be < INT_MAX. + */ + sndbuf = INT_MAX - 1; + } + else + { + vif->type = VIRTIO_IF_TYPE_TAP; + ifr.ifr_flags |= IFF_TAP; + sndbuf = INT_MAX; } - _IOCTL (vif->fd, VHOST_GET_FEATURES, &vif->remote_features); + vif->dev_instance = vif - vim->interfaces; + vif->id = args->id; + vif->num_txqs = thm->n_vlib_mains; + vif->num_rxqs = clib_max (args->num_rx_queues, 1); - if ((vif->remote_features & (1ULL << VIRTIO_NET_F_MRG_RXBUF)) == 0) + if (args->tap_flags & TAP_FLAG_ATTACH) { - 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 (args->host_if_name != NULL) + { + host_if_name = (char *) args->host_if_name; + clib_memcpy (ifr.ifr_name, host_if_name, + clib_min (IFNAMSIZ, vec_len (host_if_name))); + } + else + { + args->rv = VNET_API_ERROR_NO_MATCHING_INTERFACE; + err = clib_error_return (0, "host_if_name is not provided"); + goto error; + } + if (args->host_namespace) + { + old_netns_fd = open ("/proc/self/ns/net", O_RDONLY); + if ((nfd = 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; + } + if (setns (nfd, 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; + } + } } - if ((vif->remote_features & (1ULL << VIRTIO_RING_F_INDIRECT_DESC)) == 0) + if ((tfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 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"); + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return_unix (0, "open '/dev/net/tun'"); goto error; } + vec_add1 (vif->tap_fds, tfd); + tap_log_dbg (vif, "open tap fd %d", tfd); - if ((vif->remote_features & (1ULL << VIRTIO_F_VERSION_1)) == 0) + _IOCTL (tfd, TUNGETFEATURES, &tap_features); + tap_log_dbg (vif, "TUNGETFEATURES: features 0x%lx", tap_features); + if ((tap_features & IFF_VNET_HDR) == 0) { - args->rv = VNET_API_ERROR_UNSUPPORTED; - args->error = clib_error_return (0, "vhost-net backend doesn't support " - "VIRTIO_F_VERSION_1 features"); + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return (0, "vhost-net backend not available"); 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 ((tap_features & IFF_MULTI_QUEUE) == 0) + { + if (vif->num_rxqs > 1) + { + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return (0, "multiqueue not supported"); + goto error; + } + vif->num_rxqs = vif->num_txqs = 1; + } + else + ifr.ifr_flags |= IFF_MULTI_QUEUE; - if ((vif->tap_fd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0) + hdrsz = sizeof (virtio_net_hdr_v1_t); + if (args->tap_flags & TAP_FLAG_GSO) { - args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; - args->error = clib_error_return_unix (0, "open '/dev/net/tun'"); - goto error; + offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6; + vif->gso_enabled = 1; + } + else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD) + { + offload = TUN_F_CSUM; + vif->csum_offload_enabled = 1; } - ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE | IFF_VNET_HDR; - _IOCTL (vif->tap_fd, TUNSETIFF, (void *) &ifr); + _IOCTL (tfd, TUNSETIFF, (void *) &ifr); + tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd, + ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags); + vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name); + tap_log_dbg (vif, "ifindex %d", vif->ifindex); - 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_if_name) + host_if_name = ifr.ifr_ifrn.ifrn_name; + else + host_if_name = (char *) args->host_if_name; - /* if namespace is specified, all further netlink messages should be excuted - after we change our net namespace */ - if (args->host_namespace) + /* + * unset the persistence when attaching to existing + * interface + */ + if (args->tap_flags & TAP_FLAG_ATTACH) { - int fd; - old_netns_fd = open ("/proc/self/ns/net", O_RDONLY); - if ((fd = open_netns_fd ((char *) args->host_namespace)) == -1) + _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 0); + tap_log_dbg (vif, "TUNSETPERSIST: unset"); + } + + /* set the persistence */ + if (args->tap_flags & TAP_FLAG_PERSIST) + { + _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 1); + tap_log_dbg (vif, "TUNSETPERSIST: set"); + + /* verify persistence is set, read the flags */ + _IOCTL (tfd, TUNGETIFF, (void *) &get_ifr); + tap_log_dbg (vif, "TUNGETIFF: flags 0x%lx", get_ifr.ifr_flags); + if ((get_ifr.ifr_flags & IFF_PERSIST) == 0) { args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; - args->error = clib_error_return_unix (0, "open_netns_fd '%s'", - args->host_namespace); + args->error = clib_error_return (0, "persistence not supported"); goto error; } - args->error = vnet_netlink_set_link_netns (vif->ifindex, fd, - (char *) args->host_if_name); - if (args->error) + } + + /* create additional queues on the linux side. + * we create as many linux queue pairs as we have rx queues + */ + for (i = 1; i < vif->num_rxqs; i++) + { + if ((qfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0) { - args->rv = VNET_API_ERROR_NETLINK_ERROR; + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return_unix (0, "open '/dev/net/tun'"); goto error; } - if (setns (fd, CLONE_NEWNET) == -1) + _IOCTL (qfd, TUNSETIFF, (void *) &ifr); + tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", qfd, + ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags); + vec_add1 (vif->tap_fds, qfd); + } + + for (i = 0; i < vif->num_rxqs; i++) + { + tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u", + vif->tap_fds[i], hdrsz); + _IOCTL (vif->tap_fds[i], TUNSETVNETHDRSZ, &hdrsz); + + tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", vif->tap_fds[i], + sndbuf); + _IOCTL (vif->tap_fds[i], TUNSETSNDBUF, &sndbuf); + + tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", vif->tap_fds[i], + offload); + _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload); + + if (fcntl (vif->tap_fds[i], F_SETFL, O_NONBLOCK) < 0) { - args->rv = VNET_API_ERROR_SYSCALL_ERROR_3; - args->error = clib_error_return_unix (0, "setns '%s'", - args->host_namespace); + err = clib_error_return_unix (0, "fcntl(tfd, F_SETFL, O_NONBLOCK)"); + tap_log_err (vif, "set nonblocking: %U", format_clib_error, err); goto error; } - close (fd); - if ((vif->ifindex = if_nametoindex ((char *) args->host_if_name)) == 0) + } + + /* open as many vhost-net fds as required and set ownership */ + num_vhost_queues = clib_max (vif->num_rxqs, vif->num_txqs); + for (i = 0; i < num_vhost_queues; i++) + { + if ((vfd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0) { - args->rv = VNET_API_ERROR_SYSCALL_ERROR_3; - args->error = clib_error_return_unix (0, "if_nametoindex '%s'", - args->host_if_name); + args->rv = VNET_API_ERROR_SYSCALL_ERROR_1; + args->error = clib_error_return_unix (0, "open '/dev/vhost-net'"); goto error; } + vec_add1 (vif->vhost_fds, vfd); + virtio_log_debug (vif, "open vhost-net fd %d qpair %u", vfd, i); + _IOCTL (vfd, VHOST_SET_OWNER, 0); + virtio_log_debug (vif, "VHOST_SET_OWNER: fd %u", vfd); } - else + + _IOCTL (vif->vhost_fds[0], VHOST_GET_FEATURES, &vif->remote_features); + virtio_log_debug (vif, "VHOST_GET_FEATURES: features 0x%lx", + vif->remote_features); + + if ((vif->remote_features & VIRTIO_FEATURE (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 & VIRTIO_FEATURE (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 & VIRTIO_FEATURE (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 |= VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF); + vif->features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1); + vif->features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC); + + virtio_set_net_hdr_size (vif); + + if (!(args->tap_flags & TAP_FLAG_ATTACH)) { - if (args->host_if_name) + /* if namespace is specified, all further netlink messages should be executed + after we change our net namespace */ + if (args->host_namespace) + { + old_netns_fd = open ("/proc/self/ns/net", O_RDONLY); + if ((nfd = 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, nfd, + host_if_name); + if (args->error) + { + args->rv = VNET_API_ERROR_NETLINK_ERROR; + goto error; + } + if (setns (nfd, 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; + } + if ((vif->ifindex = if_nametoindex (host_if_name)) == 0) + { + args->rv = VNET_API_ERROR_SYSCALL_ERROR_3; + args->error = clib_error_return_unix (0, "if_nametoindex '%s'", + host_if_name); + goto error; + } + } + else if (host_if_name) { - args->error = vnet_netlink_set_link_name (vif->ifindex, - (char *) - args->host_if_name); + args->error = + vnet_netlink_set_link_name (vif->ifindex, host_if_name); if (args->error) { args->rv = VNET_API_ERROR_NETLINK_ERROR; @@ -228,29 +461,31 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } } - if (!ethernet_mac_address_is_zero (args->host_mac_addr)) + if (vif->type == VIRTIO_IF_TYPE_TAP) { + if (ethernet_mac_address_is_zero (args->host_mac_addr.bytes)) + ethernet_mac_address_generate (args->host_mac_addr.bytes); args->error = vnet_netlink_set_link_addr (vif->ifindex, - args->host_mac_addr); + args->host_mac_addr.bytes); if (args->error) { args->rv = VNET_API_ERROR_NETLINK_ERROR; goto error; } - } - if (args->host_bridge) - { - args->error = vnet_netlink_set_link_master (vif->ifindex, - (char *) args->host_bridge); - if (args->error) + if (args->host_bridge) { - args->rv = VNET_API_ERROR_NETLINK_ERROR; - goto error; + 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, @@ -302,6 +537,29 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } } + if (args->host_mtu_set) + { + args->error = + vnet_netlink_set_link_mtu (vif->ifindex, args->host_mtu_size); + if (args->error) + { + args->rv = VNET_API_ERROR_NETLINK_ERROR; + goto error; + } + } + else if (tm->host_mtu_size != 0) + { + args->error = + vnet_netlink_set_link_mtu (vif->ifindex, tm->host_mtu_size); + if (args->error) + { + args->rv = VNET_API_ERROR_NETLINK_ERROR; + goto error; + } + args->host_mtu_set = 1; + args->host_mtu_size = tm->host_mtu_size; + } + /* switch back to old net namespace */ if (args->host_namespace) { @@ -314,46 +572,123 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } } - /* Set vhost memory table */ - i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region); + for (i = 0; i < num_vhost_queues; i++) + { + if (i < vif->num_rxqs && (args->error = + virtio_vring_init (vm, vif, RX_QUEUE (i), + args->rx_ring_sz))) + { + args->rv = VNET_API_ERROR_INIT_FAILED; + goto error; + } + + if (i < vif->num_txqs && (args->error = + virtio_vring_init (vm, vif, TX_QUEUE (i), + args->tx_ring_sz))) + { + args->rv = VNET_API_ERROR_INIT_FAILED; + goto error; + } + } + + /* setup features and memtable */ + i = sizeof (vhost_memory_t) + sizeof (vhost_memory_region_t); vhost_mem = clib_mem_alloc (i); - memset (vhost_mem, 0, i); + clib_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); + vhost_mem->regions[0].memory_size = vpm->max_size; + vhost_mem->regions[0].guest_phys_addr = vpm->base_addr; + vhost_mem->regions[0].userspace_addr = + vhost_mem->regions[0].guest_phys_addr; + + for (i = 0; i < vhost_mem->nregions; i++) + virtio_log_debug (vif, "memtable region %u memory_size 0x%lx " + "guest_phys_addr 0x%lx userspace_addr 0x%lx", i, + vhost_mem->regions[0].memory_size, + vhost_mem->regions[0].guest_phys_addr, + vhost_mem->regions[0].userspace_addr); + - if ((args->error = virtio_vring_init (vm, vif, 0, args->rx_ring_sz))) + for (i = 0; i < num_vhost_queues; i++) { - args->rv = VNET_API_ERROR_INIT_FAILED; - goto error; + int fd = vif->vhost_fds[i]; + _IOCTL (fd, VHOST_SET_FEATURES, &vif->features); + virtio_log_debug (vif, "VHOST_SET_FEATURES: fd %u features 0x%lx", + fd, vif->features); + _IOCTL (fd, VHOST_SET_MEM_TABLE, vhost_mem); + virtio_log_debug (vif, "VHOST_SET_MEM_TABLE: fd %u", fd); } - if ((args->error = virtio_vring_init (vm, vif, 1, args->tx_ring_sz))) + /* finish initializing queue pair */ + for (i = 0; i < num_vhost_queues * 2; i++) { - args->rv = VNET_API_ERROR_INIT_FAILED; - goto error; + vhost_vring_addr_t addr = { 0 }; + vhost_vring_state_t state = { 0 }; + vhost_vring_file_t file = { 0 }; + virtio_vring_t *vring; + u16 qp = i >> 1; + int fd = vif->vhost_fds[qp]; + + if (i & 1) + { + if (qp >= vif->num_txqs) + continue; + vring = vec_elt_at_index (vif->txq_vrings, qp); + } + else + { + if (qp >= vif->num_rxqs) + continue; + vring = vec_elt_at_index (vif->rxq_vrings, qp); + } + + addr.index = state.index = file.index = vring->queue_id & 1; + state.num = vring->size; + virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd, + state.index, state.num); + _IOCTL (fd, VHOST_SET_VRING_NUM, &state); + + addr.flags = 0; + addr.desc_user_addr = pointer_to_uword (vring->desc); + addr.avail_user_addr = pointer_to_uword (vring->avail); + addr.used_user_addr = pointer_to_uword (vring->used); + + virtio_log_debug (vif, "VHOST_SET_VRING_ADDR fd %d index %u flags 0x%x " + "desc_user_addr 0x%lx avail_user_addr 0x%lx " + "used_user_addr 0x%lx", fd, addr.index, + addr.flags, addr.desc_user_addr, addr.avail_user_addr, + addr.used_user_addr); + _IOCTL (fd, VHOST_SET_VRING_ADDR, &addr); + + file.fd = vring->call_fd; + virtio_log_debug (vif, "VHOST_SET_VRING_CALL fd %d index %u call_fd %d", + fd, file.index, file.fd); + _IOCTL (fd, VHOST_SET_VRING_CALL, &file); + + file.fd = vring->kick_fd; + virtio_log_debug (vif, "VHOST_SET_VRING_KICK fd %d index %u kick_fd %d", + fd, file.index, file.fd); + _IOCTL (fd, VHOST_SET_VRING_KICK, &file); + + file.fd = vif->tap_fds[qp % vif->num_rxqs]; + virtio_log_debug (vif, "VHOST_NET_SET_BACKEND fd %d index %u tap_fd %d", + fd, file.index, file.fd); + _IOCTL (fd, VHOST_NET_SET_BACKEND, &file); } - if (!args->mac_addr_set) + if (vif->type == VIRTIO_IF_TYPE_TAP) { - f64 now = vlib_time_now (vm); - u32 rnd; - rnd = (u32) (now * 1e6); - rnd = random_u32 (&rnd); + if (!args->mac_addr_set) + ethernet_mac_address_generate (args->mac_addr.bytes); - memcpy (args->mac_addr + 2, &rnd, sizeof (rnd)); - args->mac_addr[0] = 2; - args->mac_addr[1] = 0xfe; + clib_memcpy (vif->mac_addr, args->mac_addr.bytes, 6); + vif->host_bridge = format (0, "%s%c", args->host_bridge, 0); } - vif->rx_ring_sz = args->rx_ring_sz != 0 ? args->rx_ring_sz : 256; - vif->tx_ring_sz = args->tx_ring_sz != 0 ? args->tx_ring_sz : 256; - vif->host_if_name = args->host_if_name; - args->host_if_name = 0; - vif->net_ns = args->host_namespace; - args->host_namespace = 0; - vif->host_bridge = args->host_bridge; - args->host_bridge = 0; - clib_memcpy (vif->host_mac_addr, args->host_mac_addr, 6); + vif->host_if_name = format (0, "%s%c", host_if_name, 0); + vif->net_ns = format (0, "%s%c", args->host_namespace, 0); + vif->host_mtu_size = args->host_mtu_size; + vif->tap_flags = args->tap_flags; + clib_memcpy (vif->host_mac_addr, args->host_mac_addr.bytes, 6); vif->host_ip4_prefix_len = args->host_ip4_prefix_len; vif->host_ip6_prefix_len = args->host_ip6_prefix_len; if (args->host_ip4_prefix_len) @@ -361,35 +696,72 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) if (args->host_ip6_prefix_len) clib_memcpy (&vif->host_ip6_addr, &args->host_ip6_addr, 16); - args->error = ethernet_register_interface (vnm, virtio_device_class.index, - vif->dev_instance, - args->mac_addr, - &vif->hw_if_index, - virtio_eth_flag_change); - if (args->error) + if (vif->type != VIRTIO_IF_TYPE_TUN) { - args->rv = VNET_API_ERROR_INVALID_REGISTRATION; - goto error; + args->error = + ethernet_register_interface (vnm, virtio_device_class.index, + vif->dev_instance, vif->mac_addr, + &vif->hw_if_index, + virtio_eth_flag_change); + if (args->error) + { + args->rv = VNET_API_ERROR_INVALID_REGISTRATION; + goto error; + } + } + else + { + vif->hw_if_index = vnet_register_interface + (vnm, virtio_device_class.index, + vif->dev_instance /* device instance */ , + tun_device_hw_interface_class.index, vif->dev_instance); + } tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 1); 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; + args->rv = 0; hw = vnet_get_hw_interface (vnm, vif->hw_if_index); hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE; + if (args->tap_flags & TAP_FLAG_GSO) + { + hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO | + VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD) + { + hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + if ((args->tap_flags & TAP_FLAG_GSO) + && (args->tap_flags & TAP_FLAG_GRO_COALESCE)) + { + virtio_set_packet_coalesce (vif); + } 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); + + for (i = 0; i < vif->num_rxqs; i++) + { + vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, i, ~0); + vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, i, + VNET_HW_IF_RX_MODE_DEFAULT); + virtio_vring_set_numa_node (vm, vif, RX_QUEUE (i)); + } + 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); - if (thm->n_vlib_mains > 1) - clib_spinlock_init (&vif->lockp); + /* + * Host tun/tap driver link carrier state is "up" at creation. The + * driver never changes this unless the backend (VPP) changes it using + * TUNSETCARRIER ioctl(). See tap_set_carrier(). + */ + vif->host_carrier_up = 1; + vif->cxq_vring = NULL; + goto done; error: @@ -399,20 +771,16 @@ error: 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 (vm, vif, i); - vec_free (vif->vrings); - memset (vif, 0, sizeof (virtio_if_t)); - pool_put (vim->interfaces, vif); + tap_log_err (vif, "%U", format_clib_error, args->error); + tap_free (vm, vif); done: if (vhost_mem) clib_mem_free (vhost_mem); if (old_netns_fd != -1) close (old_netns_fd); + if (nfd != -1) + close (nfd); } int @@ -420,38 +788,149 @@ tap_delete_if (vlib_main_t * vm, u32 sw_if_index) { 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; - hw = vnet_get_sup_hw_interface (vnm, sw_if_index); + hw = vnet_get_sup_hw_interface_api_visible_or_null (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); + if ((vif->type != VIRTIO_IF_TYPE_TAP) && (vif->type != VIRTIO_IF_TYPE_TUN)) + return VNET_API_ERROR_INVALID_INTERFACE; + /* 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); - vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, 0); + for (i = 0; i < vif->num_rxqs; i++) + vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, i); - ethernet_delete_interface (vnm, vif->hw_if_index); + if (vif->type == VIRTIO_IF_TYPE_TAP) + ethernet_delete_interface (vnm, vif->hw_if_index); + else /* VIRTIO_IF_TYPE_TUN */ + vnet_delete_hw_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); + tap_free (vm, vif); + + return 0; +} + +int +tap_csum_offload_enable_disable (vlib_main_t * vm, u32 sw_if_index, + int enable_disable) +{ + vnet_main_t *vnm = vnet_get_main (); + virtio_main_t *mm = &virtio_main; + virtio_if_t *vif; + vnet_hw_interface_t *hw; + clib_error_t *err = 0; + int i = 0; - vec_foreach_index (i, vif->vrings) virtio_vring_free (vm, vif, i); - vec_free (vif->vrings); + hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index); - tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 0); - clib_spinlock_free (&vif->lockp); - memset (vif, 0, sizeof (*vif)); - pool_put (mm->interfaces, vif); + 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); + + const unsigned int csum_offload_on = TUN_F_CSUM; + const unsigned int csum_offload_off = 0; + unsigned int offload = enable_disable ? csum_offload_on : csum_offload_off; + vec_foreach_index (i, vif->tap_fds) + _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload); + vif->gso_enabled = 0; + vif->packet_coalesce = 0; + vif->csum_offload_enabled = enable_disable ? 1 : 0; + + if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0) + { + hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO; + } + + if (enable_disable) + { + if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) == + 0) + { + hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + } + else + { + if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) != + 0) + { + hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + } + +error: + if (err) + { + clib_warning ("Error %s checksum offload on sw_if_index %d", + enable_disable ? "enabling" : "disabling", sw_if_index); + return VNET_API_ERROR_SYSCALL_ERROR_3; + } + return 0; +} + +int +tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable, + int is_packet_coalesce) +{ + vnet_main_t *vnm = vnet_get_main (); + virtio_main_t *mm = &virtio_main; + virtio_if_t *vif; + vnet_hw_interface_t *hw; + clib_error_t *err = 0; + int i = 0; + hw = vnet_get_sup_hw_interface_api_visible_or_null (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); + + const unsigned int gso_on = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6; + const unsigned int gso_off = 0; + unsigned int offload = enable_disable ? gso_on : gso_off; + vec_foreach_index (i, vif->tap_fds) + _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload); + vif->gso_enabled = enable_disable ? 1 : 0; + vif->csum_offload_enabled = 0; + if (enable_disable) + { + if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0) + { + hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO | + VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + if (is_packet_coalesce) + { + virtio_set_packet_coalesce (vif); + } + } + else + { + if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0) + { + hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO | + VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD); + } + vif->packet_coalesce = 0; + } + +error: + if (err) + { + clib_warning ("Error %s gso on sw_if_index %d", + enable_disable ? "enabling" : "disabling", sw_if_index); + return VNET_API_ERROR_SYSCALL_ERROR_3; + } return 0; } @@ -461,47 +940,54 @@ 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; + virtio_vring_t *vring; 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, + if ((vif->type != VIRTIO_IF_TYPE_TAP) + && (vif->type != VIRTIO_IF_TYPE_TUN)) + continue; vec_add2(r_tapids, tapid, 1); - memset (tapid, 0, sizeof (*tapid)); + clib_memset (tapid, 0, sizeof (*tapid)); tapid->id = vif->id; 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))); - tapid->rx_ring_sz = vif->rx_ring_sz; - tapid->tx_ring_sz = vif->tx_ring_sz; - clib_memcpy(tapid->host_mac_addr, vif->host_mac_addr, 6); + MIN (ARRAY_LEN (tapid->dev_name) - 1, vec_len (hi->name))); + vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0)); + tapid->rx_ring_sz = vring->size; + vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0)); + tapid->tx_ring_sz = vring->size; + tapid->tap_flags = vif->tap_flags; + clib_memcpy(&tapid->host_mac_addr, vif->host_mac_addr, 6); if (vif->host_if_name) { clib_memcpy(tapid->host_if_name, vif->host_if_name, MIN (ARRAY_LEN (tapid->host_if_name) - 1, - strlen ((const char *) vif->host_if_name))); + vec_len (vif->host_if_name))); } if (vif->net_ns) { clib_memcpy(tapid->host_namespace, vif->net_ns, MIN (ARRAY_LEN (tapid->host_namespace) - 1, - strlen ((const char *) vif->net_ns))); + vec_len (vif->net_ns))); } if (vif->host_bridge) { clib_memcpy(tapid->host_bridge, vif->host_bridge, MIN (ARRAY_LEN (tapid->host_bridge) - 1, - strlen ((const char *) vif->host_bridge))); + vec_len (vif->host_bridge))); } if (vif->host_ip4_prefix_len) - clib_memcpy(tapid->host_ip4_addr, &vif->host_ip4_addr, 4); + clib_memcpy(tapid->host_ip4_addr.as_u8, &vif->host_ip4_addr, 4); tapid->host_ip4_prefix_len = vif->host_ip4_prefix_len; if (vif->host_ip6_prefix_len) - clib_memcpy(tapid->host_ip6_addr, &vif->host_ip6_addr, 16); + clib_memcpy(tapid->host_ip6_addr.as_u8, &vif->host_ip6_addr, 16); tapid->host_ip6_prefix_len = vif->host_ip6_prefix_len; + tapid->host_mtu_size = vif->host_mtu_size; ); /* *INDENT-ON* */ @@ -510,6 +996,140 @@ tap_dump_ifs (tap_interface_details_t ** out_tapids) return 0; } +/* + * Set host tap/tun interface carrier state so it will appear to host + * applications that the interface's link state changed. + * + * If the kernel we're building against does not have support for the + * TUNSETCARRIER ioctl command, do nothing. + */ +int +tap_set_carrier (u32 hw_if_index, u32 carrier_up) +{ + int ret = 0; +#ifdef TUNSETCARRIER + vnet_main_t *vnm = vnet_get_main (); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + virtio_main_t *mm = &virtio_main; + virtio_if_t *vif; + int *fd; + + vif = pool_elt_at_index (mm->interfaces, hi->dev_instance); + vec_foreach (fd, vif->tap_fds) + { + ret = ioctl (*fd, TUNSETCARRIER, &carrier_up); + if (ret < 0) + { + clib_warning ("ioctl (TUNSETCARRIER) returned %d", ret); + break; + } + } + if (!ret) + vif->host_carrier_up = (carrier_up != 0); +#endif + + return ret; +} + +static clib_error_t * +tap_mtu_config (vlib_main_t * vm, unformat_input_t * input) +{ + tap_main_t *tm = &tap_main; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "host-mtu %d", &tm->host_mtu_size)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + return 0; +} + +/* + * Set host tap/tun interface speed in Mbps. + */ +int +tap_set_speed (u32 hw_if_index, u32 speed) +{ + vnet_main_t *vnm = vnet_get_main (); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + virtio_main_t *mm = &virtio_main; + virtio_if_t *vif; + int old_netns_fd = -1; + int nfd = -1; + int ctl_fd = -1; + struct ifreq ifr; + struct ethtool_cmd ecmd; + int ret = -1; + + vif = pool_elt_at_index (mm->interfaces, hi->dev_instance); + + if (vif->net_ns) + { + old_netns_fd = open ("/proc/self/ns/net", O_RDONLY); + if ((nfd = open_netns_fd ((char *) vif->net_ns)) == -1) + { + clib_warning ("Cannot open netns"); + goto done; + } + if (setns (nfd, CLONE_NEWNET) == -1) + { + clib_warning ("Cannot set ns"); + goto done; + } + } + + if ((ctl_fd = socket (AF_INET, SOCK_STREAM, 0)) == -1) + { + clib_warning ("Cannot open control socket"); + goto done; + } + + ecmd.cmd = ETHTOOL_GSET; + clib_memset (&ifr, 0, sizeof (ifr)); + clib_memcpy (ifr.ifr_name, vif->host_if_name, + strlen ((const char *) vif->host_if_name)); + ifr.ifr_data = (void *) &ecmd; + if ((ret = ioctl (ctl_fd, SIOCETHTOOL, &ifr)) < 0) + { + clib_warning ("Cannot get device settings"); + goto done; + } + + if (ethtool_cmd_speed (&ecmd) != speed) + { + ecmd.cmd = ETHTOOL_SSET; + ethtool_cmd_speed_set (&ecmd, speed); + if ((ret = ioctl (ctl_fd, SIOCETHTOOL, &ifr)) < 0) + { + clib_warning ("Cannot set device settings"); + goto done; + } + } + +done: + if (old_netns_fd != -1) + { + if (setns (old_netns_fd, CLONE_NEWNET) == -1) + { + clib_warning ("Cannot set old ns"); + } + close (old_netns_fd); + } + if (nfd != -1) + close (nfd); + if (ctl_fd != -1) + close (ctl_fd); + + return ret; +} + +/* tap { host-mtu } configuration. */ +VLIB_CONFIG_FUNCTION (tap_mtu_config, "tap"); + static clib_error_t * tap_init (vlib_main_t * vm) { @@ -519,6 +1139,8 @@ tap_init (vlib_main_t * vm) tm->log_default = vlib_log_register_class ("tap", 0); vlib_log_debug (tm->log_default, "initialized"); + tm->host_mtu_size = 0; + return error; }