X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fdevices%2Ftap%2Ftap.c;h=33d6e3bc84a0d06012b73735d58863913d81ed18;hb=4cef6de59;hp=288099e26857b6e1b849a591195883de6d9d385f;hpb=0d3d4824a46205e776ff32c82be4cb514f459a5f;p=vpp.git diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c index 288099e2685..33d6e3bc84a 100644 --- a/src/vnet/devices/tap/tap.c +++ b/src/vnet/devices/tap/tap.c @@ -18,15 +18,15 @@ #define _GNU_SOURCE #include #include +#include #include #include #include #include -#include -#include +#include +#include #include #include -#include #include #include @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -57,6 +58,18 @@ tap_main_t tap_main; 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* */ + +#define TUN_MAX_PACKET_BYTES 65355 +#define TUN_MIN_PACKET_BYTES 64 +#define TUN_DEFAULT_PACKET_BYTES 1500 + static u32 virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags) @@ -66,24 +79,6 @@ virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, 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; -} - #define TAP_MAX_INSTANCE 1024 static void @@ -91,6 +86,7 @@ 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* */ @@ -102,8 +98,13 @@ tap_free (vlib_main_t * vm, virtio_if_t * vif) virtio_vring_free_tx (vm, vif, TX_QUEUE (i)); /* *INDENT-ON* */ - if (vif->tap_fd != -1) - close (vif->tap_fd); + 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); @@ -128,18 +129,19 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) 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 = {.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR }; + 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, vfd, nfd = -1; + int tfd = -1, qfd = -1, vfd = -1, nfd = -1; char *host_if_name = 0; unsigned int offload = 0; - u16 num_q_pairs; + int sndbuf = 0; if (args->id != ~0) { @@ -163,23 +165,75 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } pool_get_zero (vim->interfaces, vif); - vif->type = VIRTIO_IF_TYPE_TAP; + + if (args->tap_flags & TAP_FLAG_TUN) + { + 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; + } + vif->dev_instance = vif - vim->interfaces; vif->id = args->id; vif->num_txqs = thm->n_vlib_mains; - vif->num_rxqs = args->num_rx_queues; - num_q_pairs = clib_max (vif->num_rxqs, vif->num_txqs); + vif->num_rxqs = clib_max (args->num_rx_queues, 1); - if (ethernet_mac_address_is_zero (args->host_mac_addr)) - ethernet_mac_address_generate (args->host_mac_addr); - clib_memcpy (vif->host_mac_addr, args->host_mac_addr, 6); + if (args->tap_flags & TAP_FLAG_ATTACH) + { + 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 = clib_netns_open (NULL /* self */); + if ((nfd = clib_netns_open (args->host_namespace)) == -1) + { + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return_unix (0, "clib_netns_open '%s'", + args->host_namespace); + goto error; + } + if (clib_setns (nfd) == -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->tap_fd = tfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0) + if ((tfd = 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; } + vec_add1 (vif->tap_fds, tfd); tap_log_dbg (vif, "open tap fd %d", tfd); _IOCTL (tfd, TUNGETFEATURES, &tap_features); @@ -193,23 +247,28 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) if ((tap_features & IFF_MULTI_QUEUE) == 0) { - if (args->num_rx_queues > 1) + 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 = num_q_pairs = 1; + vif->num_rxqs = vif->num_txqs = 1; } else ifr.ifr_flags |= IFF_MULTI_QUEUE; - hdrsz = sizeof (struct virtio_net_hdr_v1); + hdrsz = sizeof (virtio_net_hdr_v1_t); if (args->tap_flags & TAP_FLAG_GSO) { 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; + } _IOCTL (tfd, TUNSETIFF, (void *) &ifr); tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd, @@ -223,32 +282,75 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) else host_if_name = (char *) args->host_if_name; - if (fcntl (tfd, F_SETFL, O_NONBLOCK) < 0) + /* + * unset the persistence when attaching to existing + * interface + */ + if (args->tap_flags & TAP_FLAG_ATTACH) { - 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; + _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 0); + tap_log_dbg (vif, "TUNSETPERSIST: unset"); } - tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u", tfd, hdrsz); - _IOCTL (tfd, TUNSETVNETHDRSZ, &hdrsz); + /* set the persistence */ + if (args->tap_flags & TAP_FLAG_PERSIST) + { + _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 1); + tap_log_dbg (vif, "TUNSETPERSIST: set"); - i = INT_MAX; - tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", tfd, i); - _IOCTL (tfd, TUNSETSNDBUF, &i); + /* 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 (0, "persistence not supported"); + goto error; + } + } - tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", tfd, offload); - _IOCTL (tfd, TUNSETOFFLOAD, offload); + /* 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_SYSCALL_ERROR_2; + args->error = clib_error_return_unix (0, "open '/dev/net/tun'"); + goto error; + } + _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); + } - clib_memset (&ifr, 0, sizeof (ifr)); - ifr.ifr_addr.sa_family = ARPHRD_ETHER; - clib_memcpy (ifr.ifr_hwaddr.sa_data, vif->host_mac_addr, 6); - tap_log_dbg (vif, "SIOCSIFHWADDR: fd %d hwaddr %U", tfd, - format_hex_bytes, ifr.ifr_hwaddr.sa_data, 6); - _IOCTL (tfd, SIOCSIFHWADDR, (void *) &ifr); + 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); - /* open vhost-net fd for each queue pair and set ownership */ - for (i = 0; i < num_q_pairs; i++) + if (fcntl (vif->tap_fds[i], F_SETFL, O_NONBLOCK) < 0) + { + 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; + } + } + + /* 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) { @@ -297,46 +399,46 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) virtio_set_net_hdr_size (vif); - /* if namespace is specified, all further netlink messages should be executed - after we change our net namespace */ - if (args->host_namespace) + if (!(args->tap_flags & TAP_FLAG_ATTACH)) { - 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) + /* if namespace is specified, all further netlink messages should be executed + after we change our net namespace */ + if (args->host_namespace) { - 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; + old_netns_fd = clib_netns_open (NULL /* self */); + if ((nfd = clib_netns_open (args->host_namespace)) == -1) + { + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return_unix (0, "clib_netns_open '%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 (clib_setns (nfd) == -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) + else if (host_if_name) { - args->error = vnet_netlink_set_link_name (vif->ifindex, - 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; @@ -345,15 +447,29 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } } - if (args->host_bridge) + if (vif->type == VIRTIO_IF_TYPE_TAP) { - args->error = vnet_netlink_set_link_master (vif->ifindex, - (char *) args->host_bridge); + 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.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) + { + args->rv = VNET_API_ERROR_NETLINK_ERROR; + goto error; + } + } } if (args->host_ip4_prefix_len) @@ -407,18 +523,6 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } } - /* 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; - } - } - if (args->host_mtu_set) { args->error = @@ -442,7 +546,19 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) args->host_mtu_size = tm->host_mtu_size; } - for (i = 0; i < num_q_pairs; i++) + /* switch back to old net namespace */ + if (args->host_namespace) + { + if (clib_setns (old_netns_fd) == -1) + { + args->rv = VNET_API_ERROR_SYSCALL_ERROR_2; + args->error = clib_error_return_unix (0, "setns '%s'", + args->host_namespace); + goto error; + } + } + + for (i = 0; i < num_vhost_queues; i++) { if (i < vif->num_rxqs && (args->error = virtio_vring_init (vm, vif, RX_QUEUE (i), @@ -462,7 +578,7 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } /* setup features and memtable */ - i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region); + i = sizeof (vhost_memory_t) + sizeof (vhost_memory_region_t); vhost_mem = clib_mem_alloc (i); clib_memset (vhost_mem, 0, i); vhost_mem->nregions = 1; @@ -479,7 +595,7 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) vhost_mem->regions[0].userspace_addr); - for (i = 0; i < num_q_pairs; i++) + for (i = 0; i < num_vhost_queues; i++) { int fd = vif->vhost_fds[i]; _IOCTL (fd, VHOST_SET_FEATURES, &vif->features); @@ -490,11 +606,11 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) } /* finish initializing queue pair */ - for (i = 0; i < num_q_pairs * 2; i++) + for (i = 0; i < num_vhost_queues * 2; i++) { - struct vhost_vring_addr addr = { 0 }; - struct vhost_vring_state state = { 0 }; - struct vhost_vring_file file = { 0 }; + 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]; @@ -540,21 +656,25 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args) fd, file.index, file.fd); _IOCTL (fd, VHOST_SET_VRING_KICK, &file); - file.fd = tfd; + 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) - ethernet_mac_address_generate (args->mac_addr); - - clib_memcpy (vif->mac_addr, args->mac_addr, 6); + if (vif->type == VIRTIO_IF_TYPE_TAP) + { + if (!args->mac_addr_set) + ethernet_mac_address_generate (args->mac_addr.bytes); + clib_memcpy (vif->mac_addr, args->mac_addr.bytes, 6); + vif->host_bridge = format (0, "%s%c", args->host_bridge, 0); + } 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_bridge = format (0, "%s%c", args->host_bridge, 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) @@ -562,44 +682,73 @@ 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, - vif->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; + hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_INT_MODE; if (args->tap_flags & TAP_FLAG_GSO) { - hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO; - vnm->interface_main.gso_interface_count++; + hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO | + VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM | + VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM; } - vnet_hw_interface_set_input_node (vnm, vif->hw_if_index, - virtio_input_node.index); - - for (i = 0; i < vif->num_rxqs; i++) + else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD) { - 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_INTERFACE_RX_MODE_DEFAULT); + hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_TX_TCP_CKSUM | + VNET_HW_INTERFACE_CAP_SUPPORTS_TX_UDP_CKSUM; } + if ((args->tap_flags & TAP_FLAG_GSO) + && (args->tap_flags & TAP_FLAG_GRO_COALESCE)) + { + virtio_set_packet_coalesce (vif); + } + if (vif->type == VIRTIO_IF_TYPE_TUN) + { + hw->max_supported_packet_bytes = TUN_MAX_PACKET_BYTES; + hw->min_packet_bytes = hw->min_supported_packet_bytes = + TUN_MIN_PACKET_BYTES; + hw->max_packet_bytes = + args->host_mtu_size ? args->host_mtu_size : TUN_DEFAULT_PACKET_BYTES; + vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, hw->max_packet_bytes); + } + + virtio_vring_set_rx_queues (vm, vif); vif->per_interface_next_index = ~0; - virtio_vring_set_numa_node (vm, vif, RX_QUEUE (0)); vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP; vnet_hw_interface_set_flags (vnm, vif->hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP); + /* + * 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; @@ -612,6 +761,7 @@ error: args->rv = VNET_API_ERROR_SYSCALL_ERROR_3; } + tap_log_err (vif, "%U", format_clib_error, args->error); tap_free (vm, vif); done: if (vhost_mem) @@ -627,7 +777,6 @@ 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; @@ -637,20 +786,17 @@ tap_delete_if (vlib_main_t * vm, u32 sw_if_index) vif = pool_elt_at_index (mm->interfaces, hw->dev_instance); - if (vif->type != VIRTIO_IF_TYPE_TAP) + if ((vif->type != VIRTIO_IF_TYPE_TAP) && (vif->type != VIRTIO_IF_TYPE_TUN)) return VNET_API_ERROR_INVALID_INTERFACE; - /* decrement if this was a GSO interface */ - if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) - vnm->interface_main.gso_interface_count--; - /* 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); - 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; tap_free (vm, vif); @@ -659,13 +805,66 @@ tap_delete_if (vlib_main_t * vm, u32 sw_if_index) } int -tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable) +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; + + 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 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->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) != 0) + { + hw->caps &= ~VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO; + } + + if (enable_disable) + { + hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_L4_TX_CKSUM; + } + else + { + hw->caps &= ~VNET_HW_INTERFACE_CAP_SUPPORTS_L4_TX_CKSUM; + } + +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); @@ -677,23 +876,30 @@ tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable) 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; - _IOCTL (vif->tap_fd, TUNSETOFFLOAD, offload); + 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) + if ((hw->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) == 0) + { + hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO | + VNET_HW_INTERFACE_CAP_SUPPORTS_L4_TX_CKSUM; + } + if (is_packet_coalesce) { - vnm->interface_main.gso_interface_count++; - hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO; + virtio_set_packet_coalesce (vif); } } else { - if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0) + if ((hw->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) != 0) { - vnm->interface_main.gso_interface_count--; - hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO; + hw->caps &= ~(VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO | + VNET_HW_INTERFACE_CAP_SUPPORTS_L4_TX_CKSUM); } + vif->packet_coalesce = 0; } error: @@ -718,8 +924,9 @@ tap_dump_ifs (tap_interface_details_t ** out_tapids) tap_interface_details_t *tapid = NULL; /* *INDENT-OFF* */ - pool_foreach (vif, mm->interfaces, - if (vif->type != VIRTIO_IF_TYPE_TAP) + 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); clib_memset (tapid, 0, sizeof (*tapid)); @@ -727,39 +934,39 @@ tap_dump_ifs (tap_interface_details_t ** out_tapids) 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))); + 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; - clib_memcpy(tapid->host_mac_addr, vif->host_mac_addr, 6); + 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* */ *out_tapids = r_tapids; @@ -767,6 +974,41 @@ 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) { @@ -784,6 +1026,85 @@ tap_mtu_config (vlib_main_t * vm, unformat_input_t * 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 = clib_netns_open (NULL /* self */); + if ((nfd = clib_netns_open (vif->net_ns)) == -1) + { + clib_warning ("Cannot open netns"); + goto done; + } + if (clib_setns (nfd) == -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 (clib_setns (old_netns_fd) == -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");