+++ /dev/null
-/*
- *------------------------------------------------------------------
- * af_packet.c - linux kernel packet interface
- *
- * 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 <linux/if_ether.h>
-#include <linux/if_packet.h>
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <dirent.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <fcntl.h>
-
-#include <vppinfra/linux/sysfs.h>
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vnet/ip/ip.h>
-#include <vnet/devices/netlink.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/interface/rx_queue_funcs.h>
-#include <vnet/interface/tx_queue_funcs.h>
-
-#include <vnet/devices/af_packet/af_packet.h>
-
-af_packet_main_t af_packet_main;
-
-VNET_HW_INTERFACE_CLASS (af_packet_ip_device_hw_interface_class, static) = {
- .name = "af-packet-ip-device",
- .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
-};
-
-#define AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK 1024
-#define AF_PACKET_DEFAULT_TX_FRAME_SIZE (2048 * 33) // GSO packet of 64KB
-#define AF_PACKET_TX_BLOCK_NR 1
-
-#define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2 1024
-#define AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2 (2048 * 33) // GSO packet of 64KB
-#define AF_PACKET_RX_BLOCK_NR_V2 1
-
-#define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK 32
-#define AF_PACKET_DEFAULT_RX_FRAME_SIZE 2048
-#define AF_PACKET_RX_BLOCK_NR 160
-
-/*defined in net/if.h but clashes with dpdk headers */
-unsigned int if_nametoindex (const char *ifname);
-
-static clib_error_t *
-af_packet_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
- u32 frame_size)
-{
- clib_error_t *error, *rv;
- af_packet_main_t *apm = &af_packet_main;
- af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, hi->dev_instance);
-
- error = vnet_netlink_set_link_mtu (apif->host_if_index,
- frame_size + hi->frame_overhead);
-
- if (error)
- {
- vlib_log_err (apm->log_class, "netlink failed to change MTU: %U",
- format_clib_error, error);
- rv = vnet_error (VNET_ERR_SYSCALL_ERROR_1, "netlink error: %U",
- format_clib_error, error);
- clib_error_free (error);
- return rv;
- }
- else
- apif->host_mtu = frame_size + hi->frame_overhead;
- return 0;
-}
-
-static int
-af_packet_read_mtu (af_packet_if_t *apif)
-{
- af_packet_main_t *apm = &af_packet_main;
- clib_error_t *error;
- error = vnet_netlink_get_link_mtu (apif->host_if_index, &apif->host_mtu);
- if (error)
- {
- vlib_log_err (apm->log_class, "netlink failed to get MTU: %U",
- format_clib_error, error);
- clib_error_free (error);
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
- return 0;
-}
-
-static clib_error_t *
-af_packet_fd_read_ready (clib_file_t * uf)
-{
- vnet_main_t *vnm = vnet_get_main ();
-
- /* Schedule the rx node */
- vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
- return 0;
-}
-
-static int
-is_bridge (const u8 * host_if_name)
-{
- u8 *s;
- DIR *dir = NULL;
-
- s = format (0, "/sys/class/net/%s/bridge%c", host_if_name, 0);
- dir = opendir ((char *) s);
- vec_free (s);
-
- if (dir)
- {
- closedir (dir);
- return 0;
- }
-
- return -1;
-}
-
-static void
-af_packet_set_rx_queues (vlib_main_t *vm, af_packet_if_t *apif)
-{
- vnet_main_t *vnm = vnet_get_main ();
- af_packet_queue_t *rx_queue;
-
- vnet_hw_if_set_input_node (vnm, apif->hw_if_index,
- af_packet_input_node.index);
-
- vec_foreach (rx_queue, apif->rx_queues)
- {
- rx_queue->queue_index = vnet_hw_if_register_rx_queue (
- vnm, apif->hw_if_index, rx_queue->queue_id, VNET_HW_IF_RXQ_THREAD_ANY);
-
- {
- clib_file_t template = { 0 };
- template.read_function = af_packet_fd_read_ready;
- template.file_descriptor = rx_queue->fd;
- template.private_data = rx_queue->queue_index;
- template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
- template.description =
- format (0, "%U queue %u", format_af_packet_device_name,
- apif->dev_instance, rx_queue->queue_id);
- rx_queue->clib_file_index = clib_file_add (&file_main, &template);
- }
- vnet_hw_if_set_rx_queue_file_index (vnm, rx_queue->queue_index,
- rx_queue->clib_file_index);
- vnet_hw_if_set_rx_queue_mode (vnm, rx_queue->queue_index,
- VNET_HW_IF_RX_MODE_INTERRUPT);
- rx_queue->mode = VNET_HW_IF_RX_MODE_INTERRUPT;
- }
- vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
-}
-
-static void
-af_packet_set_tx_queues (vlib_main_t *vm, af_packet_if_t *apif)
-{
- vnet_main_t *vnm = vnet_get_main ();
- af_packet_main_t *apm = &af_packet_main;
- af_packet_queue_t *tx_queue;
-
- vec_foreach (tx_queue, apif->tx_queues)
- {
- tx_queue->queue_index = vnet_hw_if_register_tx_queue (
- vnm, apif->hw_if_index, tx_queue->queue_id);
- }
-
- if (apif->num_txqs == 0)
- {
- vlib_log_err (apm->log_class, "Interface %U has 0 txq",
- format_vnet_hw_if_index_name, vnm, apif->hw_if_index);
- return;
- }
-
- for (u32 j = 0; j < vlib_get_n_threads (); j++)
- {
- u32 qi = apif->tx_queues[j % apif->num_txqs].queue_index;
- vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
- }
-
- vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
-}
-
-static int
-create_packet_sock (int host_if_index, tpacket_req_u_t *rx_req,
- tpacket_req_u_t *tx_req, int *fd, af_packet_ring_t *ring,
- u32 fanout_id, af_packet_if_flags_t *flags, int ver)
-{
- af_packet_main_t *apm = &af_packet_main;
- struct sockaddr_ll sll;
- socklen_t req_sz = sizeof (tpacket_req3_t);
- int ret;
- u32 ring_sz = 0;
-
- if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
- {
- vlib_log_err (apm->log_class,
- "Failed to create AF_PACKET socket: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- /* bind before rx ring is cfged so we don't receive packets from other interfaces */
- clib_memset (&sll, 0, sizeof (sll));
- sll.sll_family = PF_PACKET;
- sll.sll_protocol = htons (ETH_P_ALL);
- sll.sll_ifindex = host_if_index;
- if (bind (*fd, (struct sockaddr *) &sll, sizeof (sll)) < 0)
- {
- vlib_log_err (apm->log_class,
- "Failed to bind rx packet socket: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- if (setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver)) < 0)
- {
- vlib_log_err (apm->log_class,
- "Failed to set rx packet interface version: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- int opt = 1;
- if (setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt)) < 0)
- {
- vlib_log_err (
- apm->log_class,
- "Failed to set packet tx ring error handling option: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- if (*flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
- {
-
- int opt2 = 1;
- if (setsockopt (*fd, SOL_PACKET, PACKET_VNET_HDR, &opt2, sizeof (opt2)) <
- 0)
- {
- // remove the flag
- *flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
- vlib_log_debug (apm->log_class,
- "Failed to set packet vnet hdr error handling "
- "option: %s (errno %d)",
- strerror (errno), errno);
- }
- }
-
-#if defined(PACKET_QDISC_BYPASS)
- if (*flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS)
- /* Introduced with Linux 3.14 so the ifdef should eventually be removed */
- if (setsockopt (*fd, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof (opt)) <
- 0)
- {
- // remove the flag
- *flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
- vlib_log_debug (apm->log_class,
- "Failed to set qdisc bypass error "
- "handling option: %s (errno %d)",
- strerror (errno), errno);
- }
-#endif
-
- if (rx_req)
- {
- if (*flags & AF_PACKET_IF_FLAGS_FANOUT)
- {
- int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
- if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
- sizeof (fanout)) < 0)
- {
- // remove the flag
- *flags &= ~AF_PACKET_IF_FLAGS_FANOUT;
- vlib_log_err (apm->log_class,
- "Failed to set fanout options: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
- }
- if (ver == TPACKET_V2)
- {
- req_sz = sizeof (tpacket_req_t);
- ring_sz += rx_req->req.tp_block_size * rx_req->req.tp_block_nr;
- }
- else
- ring_sz += rx_req->req3.tp_block_size * rx_req->req3.tp_block_nr;
- if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
- {
- vlib_log_err (apm->log_class,
- "Failed to set packet rx ring options: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
- }
-
- if (tx_req)
- {
- if (ver == TPACKET_V2)
- {
- req_sz = sizeof (tpacket_req_t);
- ring_sz += tx_req->req.tp_block_size * tx_req->req.tp_block_nr;
- }
- else
- ring_sz += tx_req->req3.tp_block_size * tx_req->req3.tp_block_nr;
- if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
- {
- vlib_log_err (apm->log_class,
- "Failed to set packet tx ring options: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
- }
- ring->ring_start_addr = mmap (NULL, ring_sz, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_LOCKED, *fd, 0);
- if (ring->ring_start_addr == MAP_FAILED)
- {
- vlib_log_err (apm->log_class, "mmap failure: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- ring->ring_size = ring_sz;
-
- return 0;
-error:
- if (*fd >= 0)
- {
- close (*fd);
- *fd = -1;
- }
- return ret;
-}
-
-int
-af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
- af_packet_create_if_arg_t *arg,
- af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
- u8 queue_id)
-{
- af_packet_main_t *apm = &af_packet_main;
- tpacket_req_u_t *rx_req = 0;
- tpacket_req_u_t *tx_req = 0;
- int ret, fd = -1;
- af_packet_ring_t ring = { 0 };
- u8 *ring_addr = 0;
- u32 rx_frames_per_block, tx_frames_per_block;
- u32 rx_frame_size, tx_frame_size;
- u32 i = 0;
-
- if (rx_queue)
- {
- rx_frames_per_block = arg->rx_frames_per_block ?
- arg->rx_frames_per_block :
- ((apif->version == TPACKET_V3) ?
- AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK :
- AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2);
-
- rx_frame_size =
- arg->rx_frame_size ?
- arg->rx_frame_size :
- ((apif->version == TPACKET_V3) ? AF_PACKET_DEFAULT_RX_FRAME_SIZE :
- AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2);
- vec_validate (rx_queue->rx_req, 0);
- rx_queue->rx_req->req.tp_block_size =
- rx_frame_size * rx_frames_per_block;
- rx_queue->rx_req->req.tp_frame_size = rx_frame_size;
- rx_queue->rx_req->req.tp_block_nr = (apif->version == TPACKET_V3) ?
- AF_PACKET_RX_BLOCK_NR :
- AF_PACKET_RX_BLOCK_NR_V2;
- rx_queue->rx_req->req.tp_frame_nr =
- rx_queue->rx_req->req.tp_block_nr * rx_frames_per_block;
- if (apif->version == TPACKET_V3)
- {
- rx_queue->rx_req->req3.tp_retire_blk_tov = 1; // 1 ms block timout
- rx_queue->rx_req->req3.tp_feature_req_word = 0;
- rx_queue->rx_req->req3.tp_sizeof_priv = 0;
- }
- rx_req = rx_queue->rx_req;
- }
- if (tx_queue)
- {
- tx_frames_per_block = arg->tx_frames_per_block ?
- arg->tx_frames_per_block :
- AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK;
- tx_frame_size = arg->tx_frame_size ? arg->tx_frame_size :
- AF_PACKET_DEFAULT_TX_FRAME_SIZE;
-
- vec_validate (tx_queue->tx_req, 0);
- tx_queue->tx_req->req.tp_block_size =
- tx_frame_size * tx_frames_per_block;
- tx_queue->tx_req->req.tp_frame_size = tx_frame_size;
- tx_queue->tx_req->req.tp_block_nr = AF_PACKET_TX_BLOCK_NR;
- tx_queue->tx_req->req.tp_frame_nr =
- AF_PACKET_TX_BLOCK_NR * tx_frames_per_block;
- if (apif->version == TPACKET_V3)
- {
- tx_queue->tx_req->req3.tp_retire_blk_tov = 0;
- tx_queue->tx_req->req3.tp_sizeof_priv = 0;
- tx_queue->tx_req->req3.tp_feature_req_word = 0;
- }
- tx_req = tx_queue->tx_req;
- }
-
- if (rx_queue || tx_queue)
- {
- ret =
- create_packet_sock (apif->host_if_index, rx_req, tx_req, &fd, &ring,
- apif->dev_instance, &arg->flags, apif->version);
-
- if (ret != 0)
- goto error;
-
- vec_add1 (apif->rings, ring);
- ring_addr = ring.ring_start_addr;
- }
-
- if (rx_queue)
- {
- rx_queue->fd = fd;
- vec_validate (rx_queue->rx_ring, rx_queue->rx_req->req.tp_block_nr - 1);
- vec_foreach_index (i, rx_queue->rx_ring)
- {
- rx_queue->rx_ring[i] =
- ring_addr + i * rx_queue->rx_req->req.tp_block_size;
- }
-
- rx_queue->next_rx_block = 0;
- rx_queue->queue_id = queue_id;
- rx_queue->is_rx_pending = 0;
- ring_addr = ring_addr + rx_queue->rx_req->req.tp_block_size *
- rx_queue->rx_req->req.tp_block_nr;
- }
-
- if (tx_queue)
- {
- tx_queue->fd = fd;
- vec_validate (tx_queue->tx_ring, tx_queue->tx_req->req.tp_block_nr - 1);
- vec_foreach_index (i, tx_queue->tx_ring)
- {
- tx_queue->tx_ring[i] =
- ring_addr + i * tx_queue->tx_req->req.tp_block_size;
- }
-
- tx_queue->next_tx_frame = 0;
- tx_queue->queue_id = queue_id;
- tx_queue->is_tx_pending = 0;
- clib_spinlock_init (&tx_queue->lockp);
- }
-
- return 0;
-error:
- vlib_log_err (apm->log_class, "Failed to set queue %u error", queue_id);
- if (rx_queue)
- vec_free (rx_queue->rx_req);
- if (tx_queue)
- vec_free (tx_queue->tx_req);
- return ret;
-}
-
-int
-af_packet_device_init (vlib_main_t *vm, af_packet_if_t *apif,
- af_packet_create_if_arg_t *args)
-{
- af_packet_main_t *apm = &af_packet_main;
- af_packet_queue_t *rx_queue = 0;
- af_packet_queue_t *tx_queue = 0;
- u16 nq = clib_min (args->num_rxqs, args->num_txqs);
- u16 i = 0;
- int ret = 0;
-
- // enable fanout feature for multi-rxqs
- if (args->num_rxqs > 1)
- args->flags |= AF_PACKET_IF_FLAGS_FANOUT;
-
- vec_validate (apif->rx_queues, args->num_rxqs - 1);
- vec_validate (apif->tx_queues, args->num_txqs - 1);
-
- for (; i < nq; i++)
- {
- rx_queue = vec_elt_at_index (apif->rx_queues, i);
- tx_queue = vec_elt_at_index (apif->tx_queues, i);
- ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i);
- if (ret != 0)
- goto error;
- }
-
- if (args->num_rxqs > args->num_txqs)
- {
- for (; i < args->num_rxqs; i++)
- {
- rx_queue = vec_elt_at_index (apif->rx_queues, i);
- ret = af_packet_queue_init (vm, apif, args, rx_queue, 0, i);
- if (ret != 0)
- goto error;
- }
- }
- else if (args->num_txqs > args->num_rxqs)
- {
- for (; i < args->num_txqs; i++)
- {
- tx_queue = vec_elt_at_index (apif->tx_queues, i);
- ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i);
- if (ret != 0)
- goto error;
- }
- }
-
- apif->num_rxqs = args->num_rxqs;
- apif->num_txqs = args->num_txqs;
-
- return 0;
-error:
- vlib_log_err (apm->log_class, "Failed to init device error");
- return ret;
-}
-
-int
-af_packet_create_if (af_packet_create_if_arg_t *arg)
-{
- af_packet_main_t *apm = &af_packet_main;
- vlib_main_t *vm = vlib_get_main ();
- int fd2 = -1;
- struct ifreq ifr;
- af_packet_if_t *apif = 0;
- u8 hw_addr[6];
- vnet_sw_interface_t *sw;
- vnet_main_t *vnm = vnet_get_main ();
- vnet_hw_if_caps_t caps = VNET_HW_IF_CAP_INT_MODE;
- uword *p;
- uword if_index;
- u8 *host_if_name_dup = 0;
- int host_if_index = -1;
- int ret = 0;
-
- p = mhash_get (&apm->if_index_by_host_if_name, arg->host_if_name);
- if (p)
- {
- apif = vec_elt_at_index (apm->interfaces, p[0]);
- arg->sw_if_index = apif->sw_if_index;
- return VNET_API_ERROR_IF_ALREADY_EXISTS;
- }
-
- host_if_name_dup = vec_dup (arg->host_if_name);
-
- /*
- * make sure host side of interface is 'UP' before binding AF_PACKET
- * socket on it.
- */
- if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
- {
- vlib_log_debug (apm->log_class,
- "Failed to create AF_UNIX socket: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- clib_memcpy (ifr.ifr_name, (const char *) arg->host_if_name,
- vec_len (arg->host_if_name));
- if (ioctl (fd2, SIOCGIFINDEX, &ifr) < 0)
- {
- vlib_log_debug (
- apm->log_class,
- "Failed to retrieve the interface (%s) index: %s (errno %d)",
- arg->host_if_name, strerror (errno), errno);
- ret = VNET_API_ERROR_INVALID_INTERFACE;
- goto error;
- }
-
- host_if_index = ifr.ifr_ifindex;
- if (ioctl (fd2, SIOCGIFFLAGS, &ifr) < 0)
- {
- vlib_log_debug (apm->log_class,
- "Failed to get the active flag: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- if (!(ifr.ifr_flags & IFF_UP))
- {
- ifr.ifr_flags |= IFF_UP;
- if (ioctl (fd2, SIOCSIFFLAGS, &ifr) < 0)
- {
- vlib_log_debug (apm->log_class,
- "Failed to set the active flag: %s (errno %d)",
- strerror (errno), errno);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
- }
-
- if (fd2 > -1)
- {
- close (fd2);
- fd2 = -1;
- }
-
- ret = is_bridge (arg->host_if_name);
- if (ret == 0) /* is a bridge, ignore state */
- host_if_index = -1;
-
- /* So far everything looks good, let's create interface */
- pool_get (apm->interfaces, apif);
- if_index = apif - apm->interfaces;
-
- apif->dev_instance = if_index;
- apif->host_if_index = host_if_index;
- apif->host_if_name = host_if_name_dup;
- apif->per_interface_next_index = ~0;
- apif->mode = arg->mode;
-
- if (arg->is_v2)
- apif->version = TPACKET_V2;
- else
- apif->version = TPACKET_V3;
-
- ret = af_packet_device_init (vm, apif, arg);
- if (ret != 0)
- goto error;
-
- ret = af_packet_read_mtu (apif);
- if (ret != 0)
- goto error;
-
-
- if (apif->mode != AF_PACKET_IF_MODE_IP)
- {
- vnet_eth_interface_registration_t eir = {};
- /*use configured or generate random MAC address */
- if (arg->hw_addr)
- clib_memcpy (hw_addr, arg->hw_addr, 6);
- else
- {
- f64 now = vlib_time_now (vm);
- u32 rnd;
- rnd = (u32) (now * 1e6);
- rnd = random_u32 (&rnd);
-
- clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
- hw_addr[0] = 2;
- hw_addr[1] = 0xfe;
- }
-
- eir.dev_class_index = af_packet_device_class.index;
- eir.dev_instance = apif->dev_instance;
- eir.address = hw_addr;
- eir.cb.set_max_frame_size = af_packet_eth_set_max_frame_size;
- apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
- }
- else
- {
- apif->hw_if_index = vnet_register_interface (
- vnm, af_packet_device_class.index, apif->dev_instance,
- af_packet_ip_device_hw_interface_class.index, apif->dev_instance);
- }
-
- sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
- apif->sw_if_index = sw->sw_if_index;
-
- af_packet_set_rx_queues (vm, apif);
- af_packet_set_tx_queues (vm, apif);
-
- if (arg->flags & AF_PACKET_IF_FLAGS_FANOUT)
- apif->is_fanout_enabled = 1;
-
- apif->is_qdisc_bypass_enabled =
- (arg->flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS);
-
- if (arg->flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
- apif->is_cksum_gso_enabled = 1;
-
- if (apif->is_cksum_gso_enabled)
- caps |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_IP4_CKSUM |
- VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
-
- vnet_hw_if_set_caps (vnm, apif->hw_if_index, caps);
- vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
- VNET_HW_INTERFACE_FLAG_LINK_UP);
-
- mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
- 0);
- arg->sw_if_index = apif->sw_if_index;
-
- return 0;
-
-error:
- if (fd2 > -1)
- {
- close (fd2);
- fd2 = -1;
- }
- vec_free (host_if_name_dup);
- if (apif)
- {
- memset (apif, 0, sizeof (*apif));
- pool_put (apm->interfaces, apif);
- }
- return ret;
-}
-
-static int
-af_packet_rx_queue_free (af_packet_if_t *apif, af_packet_queue_t *rx_queue)
-{
- clib_file_del_by_index (&file_main, rx_queue->clib_file_index);
- close (rx_queue->fd);
- rx_queue->fd = -1;
- rx_queue->rx_ring = NULL;
- vec_free (rx_queue->rx_req);
- rx_queue->rx_req = NULL;
- return 0;
-}
-
-static int
-af_packet_tx_queue_free (af_packet_if_t *apif, af_packet_queue_t *tx_queue)
-{
- close (tx_queue->fd);
- tx_queue->fd = -1;
- clib_spinlock_free (&tx_queue->lockp);
- tx_queue->tx_ring = NULL;
- vec_free (tx_queue->tx_req);
- tx_queue->tx_req = NULL;
- return 0;
-}
-
-static int
-af_packet_ring_free (af_packet_if_t *apif, af_packet_ring_t *ring)
-{
- af_packet_main_t *apm = &af_packet_main;
-
- if (ring)
- {
- // FIXME: unmap the memory
- if (munmap (ring->ring_start_addr, ring->ring_size))
- vlib_log_warn (apm->log_class,
- "Host interface %s could not free ring %p of size %u",
- apif->host_if_name, ring->ring_start_addr,
- ring->ring_size);
- else
- ring->ring_start_addr = 0;
- }
-
- return 0;
-}
-
-int
-af_packet_delete_if (u8 *host_if_name)
-{
- vnet_main_t *vnm = vnet_get_main ();
- af_packet_main_t *apm = &af_packet_main;
- af_packet_if_t *apif;
- af_packet_queue_t *rx_queue;
- af_packet_queue_t *tx_queue;
- af_packet_ring_t *ring;
- uword *p;
-
- p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
- if (p == NULL)
- {
- vlib_log_warn (apm->log_class, "Host interface %s does not exist",
- host_if_name);
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
- apif = pool_elt_at_index (apm->interfaces, p[0]);
-
- /* bring down the interface */
- vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
- if (apif->mode != AF_PACKET_IF_MODE_IP)
- ethernet_delete_interface (vnm, apif->hw_if_index);
- else
- vnet_delete_hw_interface (vnm, apif->hw_if_index);
-
- /* clean up */
- vec_foreach (rx_queue, apif->rx_queues)
- af_packet_rx_queue_free (apif, rx_queue);
- vec_foreach (tx_queue, apif->tx_queues)
- af_packet_tx_queue_free (apif, tx_queue);
- vec_foreach (ring, apif->rings)
- af_packet_ring_free (apif, ring);
-
- vec_free (apif->rx_queues);
- apif->rx_queues = NULL;
- vec_free (apif->tx_queues);
- apif->tx_queues = NULL;
- vec_free (apif->rings);
- apif->rings = NULL;
-
- vec_free (apif->host_if_name);
- apif->host_if_name = NULL;
- apif->host_if_index = -1;
-
- mhash_unset (&apm->if_index_by_host_if_name, host_if_name, p);
-
- memset (apif, 0, sizeof (*apif));
- pool_put (apm->interfaces, apif);
-
- return 0;
-}
-
-int
-af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set)
-{
- // deprecated ...
- return 0;
-}
-
-int
-af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
-{
- af_packet_main_t *apm = &af_packet_main;
- af_packet_if_t *apif;
- af_packet_if_detail_t *r_af_packet_ifs = NULL;
- af_packet_if_detail_t *af_packet_if = NULL;
-
- pool_foreach (apif, apm->interfaces)
- {
- vec_add2 (r_af_packet_ifs, af_packet_if, 1);
- af_packet_if->sw_if_index = apif->sw_if_index;
- if (apif->host_if_name)
- {
- clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
- MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
- strlen ((const char *) apif->host_if_name)));
- }
- }
-
- *out_af_packet_ifs = r_af_packet_ifs;
-
- return 0;
-}
-
-static clib_error_t *
-af_packet_init (vlib_main_t * vm)
-{
- af_packet_main_t *apm = &af_packet_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
-
- clib_memset (apm, 0, sizeof (af_packet_main_t));
-
- mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
-
- vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
- CLIB_CACHE_LINE_BYTES);
-
- apm->log_class = vlib_log_register_class ("af_packet", 0);
- vlib_log_debug (apm->log_class, "initialized");
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (af_packet_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff