diff options
Diffstat (limited to 'src/vnet/devices/tap')
| -rw-r--r-- | src/vnet/devices/tap/cli.c | 306 | ||||
| -rw-r--r-- | src/vnet/devices/tap/tap.c | 352 | ||||
| -rw-r--r-- | src/vnet/devices/tap/tap.h | 63 | ||||
| -rw-r--r-- | src/vnet/devices/tap/tapv2.api | 110 | ||||
| -rw-r--r-- | src/vnet/devices/tap/tapv2_api.c | 237 |
5 files changed, 1068 insertions, 0 deletions
diff --git a/src/vnet/devices/tap/cli.c b/src/vnet/devices/tap/cli.c new file mode 100644 index 00000000000..f7fc1e63be7 --- /dev/null +++ b/src/vnet/devices/tap/cli.c @@ -0,0 +1,306 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2016 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 <stdint.h> +#include <net/if.h> +#include <sys/ioctl.h> +#include <inttypes.h> + +#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/ip/format.h> +#include <linux/virtio_net.h> +#include <linux/vhost.h> +#include <vnet/devices/virtio/virtio.h> +#include <vnet/devices/tap/tap.h> + +static clib_error_t * +tap_create_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, *line_input = &_line_input; + tap_create_if_args_t args = { 0 }; + int ip_addr_set = 0; + + /* Get a line of input. */ + if (!unformat_user (input, unformat_line_input, line_input)) + return clib_error_return (0, "Missing name <interface>"); + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "name %s", &args.name)) + ; + else if (unformat (line_input, "host-ns %s", &args.host_namespace)) + ; + else if (unformat (line_input, "host-bridge %s", &args.host_bridge)) + ; + else if (unformat (line_input, "host-ip4-addr %U/%d", + unformat_ip4_address, &args.host_ip4_addr, + &args.host_ip4_prefix_len)) + ip_addr_set = 1; + else if (unformat (line_input, "host-ip6-addr %U/%d", + unformat_ip6_address, &args.host_ip6_addr, + &args.host_ip6_prefix_len)) + ip_addr_set = 1; + else if (unformat (line_input, "rx-ring-size %d", &args.rx_ring_sz)) + ; + else if (unformat (line_input, "tx-ring-size %d", &args.tx_ring_sz)) + ; + else if (unformat (line_input, "hw-addr %U", + unformat_ethernet_address, args.hw_addr)) + args.hw_addr_set = 1; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + unformat_free (line_input); + + if (ip_addr_set && args.host_bridge) + return clib_error_return (0, "Please specify either host ip address or " + "host bridge"); + + tap_create_if (vm, &args); + + vec_free (args.name); + vec_free (args.host_namespace); + vec_free (args.host_bridge); + + return args.error; + +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tap_create_command, static) = { + .path = "create tap", + .short_help = "create tap {name <if-name>} [hw-addr <mac-address>] " + "[rx-ring-size <size>] [tx-ring-size <size>] [host-ns <netns>] " + "[host-bridge <bridge-name>] [host-ip4-addr <ip4addr/mask>] " + "[host-ip6-addr <ip6-addr]", + .function = tap_create_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +tap_delete_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, *line_input = &_line_input; + u32 sw_if_index = ~0; + vnet_main_t *vnm = vnet_get_main (); + int rv; + + /* Get a line of input. */ + if (!unformat_user (input, unformat_line_input, line_input)) + return clib_error_return (0, "Missing <interface>"); + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "sw_if_index %d", &sw_if_index)) + ; + else if (unformat (line_input, "%U", unformat_vnet_sw_interface, + vnm, &sw_if_index)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + unformat_free (line_input); + + if (sw_if_index == ~0) + return clib_error_return (0, + "please specify interface name or sw_if_index"); + + rv = tap_delete_if (vm, sw_if_index); + if (rv == VNET_API_ERROR_INVALID_SW_IF_INDEX) + return clib_error_return (0, "not a tap interface"); + else if (rv != 0) + return clib_error_return (0, "error on deleting tap interface"); + + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tap_delete__command, static) = +{ + .path = "delete tap", + .short_help = "delete tap {<interface> | sw_if_index <sw_idx>}", + .function = tap_delete_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +tap_show_command_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + virtio_main_t *mm = &virtio_main; + virtio_if_t *vif; + vnet_main_t *vnm = vnet_get_main (); + int show_descr = 0; + clib_error_t *error = 0; + u32 hw_if_index, *hw_if_indices = 0; + virtio_vring_t *vring; + int i, j; + struct feat_struct + { + u8 bit; + char *str; + }; + struct feat_struct *feat_entry; + + static struct feat_struct feat_array[] = { +#define _(s,b) { .str = #s, .bit = b, }, + foreach_virtio_net_features +#undef _ + {.str = NULL} + }; + + struct feat_struct *flag_entry; + static struct feat_struct flags_array[] = { +#define _(b,e,s) { .bit = b, .str = s, }, + foreach_virtio_if_flag +#undef _ + {.str = NULL} + }; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat + (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index)) + vec_add1 (hw_if_indices, hw_if_index); + else if (unformat (input, "descriptors")) + show_descr = 1; + else + { + error = clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + goto done; + } + } + + if (vec_len (hw_if_indices) == 0) + { + /* *INDENT-OFF* */ + pool_foreach (vif, mm->interfaces, + vec_add1 (hw_if_indices, vif->hw_if_index); + ); + /* *INDENT-ON* */ + } + + for (hw_if_index = 0; hw_if_index < vec_len (hw_if_indices); hw_if_index++) + { + vnet_hw_interface_t *hi = + vnet_get_hw_interface (vnm, hw_if_indices[hw_if_index]); + vif = pool_elt_at_index (mm->interfaces, hi->dev_instance); + vlib_cli_output (vm, "interface %U", format_vnet_sw_if_index_name, + vnm, vif->sw_if_index); + if (vif->name) + vlib_cli_output (vm, " name \"%s\"", vif->name); + if (vif->net_ns) + vlib_cli_output (vm, " host-ns \"%s\"", vif->net_ns); + vlib_cli_output (vm, " flags 0x%x", vif->flags); + flag_entry = (struct feat_struct *) &flags_array; + while (flag_entry->str) + { + if (vif->flags & (1ULL << flag_entry->bit)) + vlib_cli_output (vm, " %s (%d)", flag_entry->str, + flag_entry->bit); + flag_entry++; + } + vlib_cli_output (vm, " fd %d", vif->fd); + vlib_cli_output (vm, " tap-fd %d", vif->tap_fd); + vlib_cli_output (vm, " features 0x%lx", vif->features); + feat_entry = (struct feat_struct *) &feat_array; + while (feat_entry->str) + { + if (vif->features & (1ULL << feat_entry->bit)) + vlib_cli_output (vm, " %s (%d)", feat_entry->str, + feat_entry->bit); + feat_entry++; + } + vlib_cli_output (vm, " remote-features 0x%lx", vif->remote_features); + feat_entry = (struct feat_struct *) &feat_array; + while (feat_entry->str) + { + if (vif->remote_features & (1ULL << feat_entry->bit)) + vlib_cli_output (vm, " %s (%d)", feat_entry->str, + feat_entry->bit); + feat_entry++; + } + vec_foreach_index (i, vif->vrings) + { + // RX = 0, TX = 1 + vring = vec_elt_at_index (vif->vrings, i); + vlib_cli_output (vm, " Virtqueue (%s)", (i & 1) ? "TX" : "RX"); + vlib_cli_output (vm, " qsz %d, last_used_idx %d, desc_in_use %d", + vring->size, vring->last_used_idx, + vring->desc_in_use); + vlib_cli_output (vm, + " avail.flags 0x%x avail.idx %d used.flags 0x%x used.idx %d", + vring->avail->flags, vring->avail->idx, + vring->used->flags, vring->used->idx); + vlib_cli_output (vm, " kickfd %d, callfd %d", vring->kick_fd, + vring->call_fd); + if (show_descr) + { + vlib_cli_output (vm, "\n descriptor table:\n"); + vlib_cli_output (vm, + " id addr len flags next user_addr\n"); + vlib_cli_output (vm, + " ===== ================== ===== ====== ===== ==================\n"); + vring = vif->vrings; + for (j = 0; j < vring->size; j++) + { + struct vring_desc *desc = &vring->desc[j]; + vlib_cli_output (vm, + " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n", + j, desc->addr, + desc->len, + desc->flags, desc->next, desc->addr); + } + } + } + } +done: + vec_free (hw_if_indices); + return error; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tap_show_command, static) = { + .path = "show tap", + .short_help = "show tap {<interface>] [descriptors]", + .function = tap_show_command_fn, +}; +/* *INDENT-ON* */ + +clib_error_t * +tap_cli_init (vlib_main_t * vm) +{ + return 0; +} + +VLIB_INIT_FUNCTION (tap_cli_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c new file mode 100644 index 00000000000..b4004f70189 --- /dev/null +++ b/src/vnet/devices/tap/tap.c @@ -0,0 +1,352 @@ +/* + *------------------------------------------------------------------ + * 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 <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <net/if.h> +#include <linux/if_tun.h> +#include <sys/ioctl.h> +#include <linux/virtio_net.h> +#include <linux/vhost.h> +#include <sys/eventfd.h> + +#include <linux/netlink.h> +#include <linux/rtnetlink.h> + +#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/tap/tap.h> + +#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: + */ diff --git a/src/vnet/devices/tap/tap.h b/src/vnet/devices/tap/tap.h new file mode 100644 index 00000000000..0e0f8cb4056 --- /dev/null +++ b/src/vnet/devices/tap/tap.h @@ -0,0 +1,63 @@ +/* + *------------------------------------------------------------------ + * 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. + *------------------------------------------------------------------ + */ + +#ifndef _VNET_DEVICES_VIRTIO_TAP_H_ +#define _VNET_DEVICES_VIRTIO_TAP_H_ + +#ifndef MIN +#define MIN(x,y) (((x)<(y))?(x):(y)) +#endif + +typedef struct +{ + u8 *name; + u8 hw_addr_set; + u8 hw_addr[6]; + u16 rx_ring_sz; + u16 tx_ring_sz; + u8 *host_namespace; + u8 *host_bridge; + ip4_address_t host_ip4_addr; + u32 host_ip4_prefix_len; + ip6_address_t host_ip6_addr; + u32 host_ip6_prefix_len; + /* return */ + u32 sw_if_index; + int rv; + clib_error_t *error; +} tap_create_if_args_t; + +/** TAP interface details struct */ +typedef struct +{ + u32 sw_if_index; + u8 dev_name[64]; +} tap_interface_details_t; + +void tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args); +int tap_delete_if (vlib_main_t * vm, u32 sw_if_index); +int tap_dump_ifs (tap_interface_details_t ** out_tapids); + +#endif /* _VNET_DEVICES_VIRTIO_TAP_H_ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/devices/tap/tapv2.api b/src/vnet/devices/tap/tapv2.api new file mode 100644 index 00000000000..03788607fe5 --- /dev/null +++ b/src/vnet/devices/tap/tapv2.api @@ -0,0 +1,110 @@ +/* + * 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. + */ + +/** \file + + This file defines vpe control-plane API messages for + the Linux kernel TAP device driver +*/ + +vl_api_version 1.0.0 + +/** \brief Initialize a new tap interface with the given paramters + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param use_random_mac - let the system generate a unique mac address + @param tap_name - name to associate with the new interface + @param mac_address - mac addr to assign to the interface if use_radom not set + @param tx_ring_sz - the number of entries of TX ring + @param rx_ring_sz - the number of entries of RX ring + @param host_namespace_set - host namespece should be set + @param host_namespace - host namespace to attach interface to + @param host_bridge_set - host bridge should be set + @param host_bridge - host bridge to attach interface to + @param host_ip4_addr_set - host IPv4 ip address should be set + @param host_ip4_addr - host IPv4 ip address + @param host_ip4_prefix_len - host IPv4 ip address prefix length + @param host_ip6_addr_set - host IPv6 ip address should be set + @param host_ip6_addr - host IPv6 ip address + @param host_ip6_prefix_len - host IPv6 ip address prefix length +*/ +define tap_create_v2 +{ + u32 client_index; + u32 context; + u8 use_random_mac; + u8 tap_name[64]; + u8 mac_address[6]; + u16 tx_ring_sz; /* optional, default is 256 entries, must be power of 2 */ + u16 rx_ring_sz; /* optional, default is 256 entries, must be power of 2 */ + u8 host_namespace_set; + u8 host_namespace[64]; + u8 host_bridge_set; + u8 host_bridge[64]; + u8 host_ip4_addr_set; + u8 host_ip4_addr[4]; + u8 host_ip4_prefix_len; + u8 host_ip6_addr_set; + u8 host_ip6_addr[16]; + u8 host_ip6_prefix_len; +}; + +/** \brief Reply for tap create reply + @param context - returned sender context, to match reply w/ request + @param retval - return code + @param sw_if_index - software index allocated for the new tap interface +*/ +define tap_create_v2_reply +{ + u32 context; + i32 retval; + u32 sw_if_index; +}; + +/** \brief Delete tap interface + @param client_index - opaque cookie to identify the sender + @param context - sender context, to match reply w/ request + @param sw_if_index - interface index of existing tap interface +*/ +autoreply define tap_delete_v2 +{ + u32 client_index; + u32 context; + u32 sw_if_index; +}; + +/** \brief Dump tap interfaces request */ +define sw_interface_tap_v2_dump +{ + u32 client_index; + u32 context; +}; + +/** \brief Reply for tap dump request + @param sw_if_index - software index of tap interface + @param dev_name - Linux tap device name +*/ +define sw_interface_tap_v2_details +{ + u32 context; + u32 sw_if_index; + u8 dev_name[64]; +}; + +/* + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vnet/devices/tap/tapv2_api.c b/src/vnet/devices/tap/tapv2_api.c new file mode 100644 index 00000000000..2d4d241a3dc --- /dev/null +++ b/src/vnet/devices/tap/tapv2_api.c @@ -0,0 +1,237 @@ +/* + *------------------------------------------------------------------ + * tap_api.c - vnet tap device driver API support + * + * 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 <vnet/vnet.h> +#include <vlibmemory/api.h> + +#include <vnet/interface.h> +#include <vnet/api_errno.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/ip/ip.h> + +#include <vnet/vnet_msg_enum.h> + +#define vl_typedefs /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_typedefs + +#define vl_endianfun /* define message structures */ +#include <vnet/vnet_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include <vnet/vnet_all_api_h.h> +#undef vl_printfun + +#include <vlibapi/api_helper_macros.h> +#include <vnet/devices/tap/tap.h> + +#define foreach_tapv2_api_msg \ +_(TAP_CREATE_V2, tap_create_v2) \ +_(TAP_DELETE_V2, tap_delete_v2) \ +_(SW_INTERFACE_TAP_V2_DUMP, sw_interface_tap_v2_dump) + +static void +vl_api_tap_create_v2_t_handler (vl_api_tap_create_v2_t * mp) +{ + vlib_main_t *vm = vlib_get_main (); + vl_api_tap_create_v2_reply_t *rmp; + unix_shared_memory_queue_t *q; + tap_create_if_args_t _a, *ap = &_a; + + memset (ap, 0, sizeof (*ap)); + + ap->name = mp->tap_name; + if (!mp->use_random_mac) + { + clib_memcpy (ap->hw_addr, mp->mac_address, 6); + ap->hw_addr_set = 1; + } + ap->rx_ring_sz = mp->rx_ring_sz; + ap->tx_ring_sz = mp->tx_ring_sz; + ap->sw_if_index = (u32) ~ 0; + + if (mp->host_namespace_set) + ap->host_namespace = mp->host_namespace; + + if (mp->host_bridge_set) + ap->host_bridge = mp->host_bridge; + + if (mp->host_ip4_addr_set) + { + clib_memcpy (&ap->host_ip4_addr.as_u8, mp->host_ip4_addr, 4); + ap->host_ip4_prefix_len = mp->host_ip4_prefix_len; + } + + if (mp->host_ip6_addr_set) + { + clib_memcpy (&ap->host_ip6_addr, mp->host_ip6_addr, 16); + ap->host_ip6_prefix_len = mp->host_ip6_prefix_len; + } + + tap_create_if (vm, ap); + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (!q) + return; + + rmp = vl_msg_api_alloc (sizeof (*rmp)); + rmp->_vl_msg_id = ntohs (VL_API_TAP_CREATE_V2_REPLY); + rmp->context = mp->context; + rmp->retval = ntohl (ap->rv); + rmp->sw_if_index = ntohl (ap->sw_if_index); + + vl_msg_api_send_shmem (q, (u8 *) & rmp); +} + +static void +tap_send_sw_interface_event_deleted (vpe_api_main_t * am, + unix_shared_memory_queue_t * q, + u32 sw_if_index) +{ + vl_api_sw_interface_event_t *mp; + + mp = vl_msg_api_alloc (sizeof (*mp)); + memset (mp, 0, sizeof (*mp)); + mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_EVENT); + mp->sw_if_index = ntohl (sw_if_index); + + mp->admin_up_down = 0; + mp->link_up_down = 0; + mp->deleted = 1; + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + +static void +vl_api_tap_delete_v2_t_handler (vl_api_tap_delete_v2_t * mp) +{ + vlib_main_t *vm = vlib_get_main (); + int rv; + vpe_api_main_t *vam = &vpe_api_main; + vl_api_tap_delete_v2_reply_t *rmp; + unix_shared_memory_queue_t *q; + u32 sw_if_index = ntohl (mp->sw_if_index); + + rv = tap_delete_if (vm, sw_if_index); + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (!q) + return; + + rmp = vl_msg_api_alloc (sizeof (*rmp)); + rmp->_vl_msg_id = ntohs (VL_API_TAP_DELETE_V2_REPLY); + rmp->context = mp->context; + rmp->retval = ntohl (rv); + + vl_msg_api_send_shmem (q, (u8 *) & rmp); + + if (!rv) + tap_send_sw_interface_event_deleted (vam, q, sw_if_index); +} + +static void +tap_send_sw_interface_details (vpe_api_main_t * am, + unix_shared_memory_queue_t * q, + tap_interface_details_t * tap_if, u32 context) +{ + vl_api_sw_interface_tap_v2_details_t *mp; + mp = vl_msg_api_alloc (sizeof (*mp)); + memset (mp, 0, sizeof (*mp)); + mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_TAP_V2_DETAILS); + mp->sw_if_index = ntohl (tap_if->sw_if_index); + clib_memcpy (mp->dev_name, tap_if->dev_name, + MIN (ARRAY_LEN (mp->dev_name) - 1, + strlen ((const char *) tap_if->dev_name))); + mp->context = context; + + vl_msg_api_send_shmem (q, (u8 *) & mp); +} + +static void +vl_api_sw_interface_tap_v2_dump_t_handler (vl_api_sw_interface_tap_v2_dump_t * + mp) +{ + int rv; + vpe_api_main_t *am = &vpe_api_main; + unix_shared_memory_queue_t *q; + tap_interface_details_t *tapifs = NULL; + tap_interface_details_t *tap_if = NULL; + + q = vl_api_client_index_to_input_queue (mp->client_index); + if (q == 0) + return; + + rv = tap_dump_ifs (&tapifs); + if (rv) + return; + + vec_foreach (tap_if, tapifs) + { + tap_send_sw_interface_details (am, q, tap_if, mp->context); + } + + vec_free (tapifs); +} + +#define vl_msg_name_crc_list +#include <vnet/vnet_all_api_h.h> +#undef vl_msg_name_crc_list + +static void +tap_setup_message_id_table (api_main_t * am) +{ +#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id); + foreach_vl_msg_name_crc_tapv2; +#undef _ +} + +static clib_error_t * +tapv2_api_hookup (vlib_main_t * vm) +{ + api_main_t *am = &api_main; + +#define _(N,n) \ + vl_msg_api_set_handlers(VL_API_##N, #n, \ + vl_api_##n##_t_handler, \ + vl_noop_handler, \ + vl_api_##n##_t_endian, \ + vl_api_##n##_t_print, \ + sizeof(vl_api_##n##_t), 1); + foreach_tapv2_api_msg; +#undef _ + + /* + * Set up the (msg_name, crc, message-id) table + */ + tap_setup_message_id_table (am); + + return 0; +} + +VLIB_API_INIT_FUNCTION (tapv2_api_hookup); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |