2 *------------------------------------------------------------------
3 * af_packet.c - linux kernel packet interface
5 * Copyright (c) 2016 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
20 #include <linux/if_ether.h>
21 #include <linux/if_packet.h>
22 #include <sys/ioctl.h>
26 #include <sys/types.h>
29 #include <vppinfra/linux/sysfs.h>
30 #include <vlib/vlib.h>
31 #include <vlib/unix/unix.h>
32 #include <vnet/ip/ip.h>
33 #include <vnet/devices/netlink.h>
34 #include <vnet/ethernet/ethernet.h>
35 #include <vnet/interface/rx_queue_funcs.h>
36 #include <vnet/interface/tx_queue_funcs.h>
38 #include <vnet/devices/af_packet/af_packet.h>
40 af_packet_main_t af_packet_main;
42 VNET_HW_INTERFACE_CLASS (af_packet_ip_device_hw_interface_class, static) = {
43 .name = "af-packet-ip-device",
44 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
47 #define AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK 1024
48 #define AF_PACKET_DEFAULT_TX_FRAME_SIZE (2048 * 33) // GSO packet of 64KB
49 #define AF_PACKET_TX_BLOCK_NR 1
51 #define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2 1024
52 #define AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2 (2048 * 33) // GSO packet of 64KB
53 #define AF_PACKET_RX_BLOCK_NR_V2 1
55 #define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK 32
56 #define AF_PACKET_DEFAULT_RX_FRAME_SIZE 2048
57 #define AF_PACKET_RX_BLOCK_NR 160
59 /*defined in net/if.h but clashes with dpdk headers */
60 unsigned int if_nametoindex (const char *ifname);
63 af_packet_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
66 clib_error_t *error, *rv;
67 af_packet_main_t *apm = &af_packet_main;
68 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, hi->dev_instance);
70 error = vnet_netlink_set_link_mtu (apif->host_if_index,
71 frame_size + hi->frame_overhead);
75 vlib_log_err (apm->log_class, "netlink failed to change MTU: %U",
76 format_clib_error, error);
77 rv = vnet_error (VNET_ERR_SYSCALL_ERROR_1, "netlink error: %U",
78 format_clib_error, error);
79 clib_error_free (error);
83 apif->host_mtu = frame_size + hi->frame_overhead;
88 af_packet_read_mtu (af_packet_if_t *apif)
90 af_packet_main_t *apm = &af_packet_main;
92 error = vnet_netlink_get_link_mtu (apif->host_if_index, &apif->host_mtu);
95 vlib_log_err (apm->log_class, "netlink failed to get MTU: %U",
96 format_clib_error, error);
97 clib_error_free (error);
98 return VNET_API_ERROR_SYSCALL_ERROR_1;
103 static clib_error_t *
104 af_packet_fd_read_ready (clib_file_t * uf)
106 vnet_main_t *vnm = vnet_get_main ();
108 /* Schedule the rx node */
109 vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
114 is_bridge (const u8 * host_if_name)
119 s = format (0, "/sys/class/net/%s/bridge%c", host_if_name, 0);
120 dir = opendir ((char *) s);
133 af_packet_set_rx_queues (vlib_main_t *vm, af_packet_if_t *apif)
135 vnet_main_t *vnm = vnet_get_main ();
136 af_packet_queue_t *rx_queue;
138 vnet_hw_if_set_input_node (vnm, apif->hw_if_index,
139 af_packet_input_node.index);
141 vec_foreach (rx_queue, apif->rx_queues)
143 rx_queue->queue_index = vnet_hw_if_register_rx_queue (
144 vnm, apif->hw_if_index, rx_queue->queue_id, VNET_HW_IF_RXQ_THREAD_ANY);
147 clib_file_t template = { 0 };
148 template.read_function = af_packet_fd_read_ready;
149 template.file_descriptor = rx_queue->fd;
150 template.private_data = rx_queue->queue_index;
151 template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
152 template.description =
153 format (0, "%U queue %u", format_af_packet_device_name,
154 apif->dev_instance, rx_queue->queue_id);
155 rx_queue->clib_file_index = clib_file_add (&file_main, &template);
157 vnet_hw_if_set_rx_queue_file_index (vnm, rx_queue->queue_index,
158 rx_queue->clib_file_index);
159 vnet_hw_if_set_rx_queue_mode (vnm, rx_queue->queue_index,
160 VNET_HW_IF_RX_MODE_INTERRUPT);
161 rx_queue->mode = VNET_HW_IF_RX_MODE_INTERRUPT;
163 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
167 af_packet_set_tx_queues (vlib_main_t *vm, af_packet_if_t *apif)
169 vnet_main_t *vnm = vnet_get_main ();
170 af_packet_main_t *apm = &af_packet_main;
171 af_packet_queue_t *tx_queue;
173 vec_foreach (tx_queue, apif->tx_queues)
175 tx_queue->queue_index = vnet_hw_if_register_tx_queue (
176 vnm, apif->hw_if_index, tx_queue->queue_id);
179 if (apif->num_txqs == 0)
181 vlib_log_err (apm->log_class, "Interface %U has 0 txq",
182 format_vnet_hw_if_index_name, vnm, apif->hw_if_index);
186 for (u32 j = 0; j < vlib_get_n_threads (); j++)
188 u32 qi = apif->tx_queues[j % apif->num_txqs].queue_index;
189 vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
192 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
196 create_packet_sock (int host_if_index, tpacket_req_u_t *rx_req,
197 tpacket_req_u_t *tx_req, int *fd, af_packet_ring_t *ring,
198 u32 fanout_id, af_packet_if_flags_t *flags, int ver)
200 af_packet_main_t *apm = &af_packet_main;
201 struct sockaddr_ll sll;
202 socklen_t req_sz = sizeof (tpacket_req3_t);
206 if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
208 vlib_log_err (apm->log_class,
209 "Failed to create AF_PACKET socket: %s (errno %d)",
210 strerror (errno), errno);
211 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
215 /* bind before rx ring is cfged so we don't receive packets from other interfaces */
216 clib_memset (&sll, 0, sizeof (sll));
217 sll.sll_family = PF_PACKET;
218 sll.sll_protocol = htons (ETH_P_ALL);
219 sll.sll_ifindex = host_if_index;
220 if (bind (*fd, (struct sockaddr *) &sll, sizeof (sll)) < 0)
222 vlib_log_err (apm->log_class,
223 "Failed to bind rx packet socket: %s (errno %d)",
224 strerror (errno), errno);
225 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
229 if (setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver)) < 0)
231 vlib_log_err (apm->log_class,
232 "Failed to set rx packet interface version: %s (errno %d)",
233 strerror (errno), errno);
234 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
239 if (setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt)) < 0)
243 "Failed to set packet tx ring error handling option: %s (errno %d)",
244 strerror (errno), errno);
245 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
249 if (*flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
253 if (setsockopt (*fd, SOL_PACKET, PACKET_VNET_HDR, &opt2, sizeof (opt2)) <
257 *flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
258 vlib_log_debug (apm->log_class,
259 "Failed to set packet vnet hdr error handling "
260 "option: %s (errno %d)",
261 strerror (errno), errno);
265 #if defined(PACKET_QDISC_BYPASS)
266 if (*flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS)
267 /* Introduced with Linux 3.14 so the ifdef should eventually be removed */
268 if (setsockopt (*fd, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof (opt)) <
272 *flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
273 vlib_log_debug (apm->log_class,
274 "Failed to set qdisc bypass error "
275 "handling option: %s (errno %d)",
276 strerror (errno), errno);
282 if (*flags & AF_PACKET_IF_FLAGS_FANOUT)
284 int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
285 if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
286 sizeof (fanout)) < 0)
289 *flags &= ~AF_PACKET_IF_FLAGS_FANOUT;
290 vlib_log_err (apm->log_class,
291 "Failed to set fanout options: %s (errno %d)",
292 strerror (errno), errno);
293 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
297 if (ver == TPACKET_V2)
299 req_sz = sizeof (tpacket_req_t);
300 ring_sz += rx_req->req.tp_block_size * rx_req->req.tp_block_nr;
303 ring_sz += rx_req->req3.tp_block_size * rx_req->req3.tp_block_nr;
304 if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
306 vlib_log_err (apm->log_class,
307 "Failed to set packet rx ring options: %s (errno %d)",
308 strerror (errno), errno);
309 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
316 if (ver == TPACKET_V2)
318 req_sz = sizeof (tpacket_req_t);
319 ring_sz += tx_req->req.tp_block_size * tx_req->req.tp_block_nr;
322 ring_sz += tx_req->req3.tp_block_size * tx_req->req3.tp_block_nr;
323 if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
325 vlib_log_err (apm->log_class,
326 "Failed to set packet tx ring options: %s (errno %d)",
327 strerror (errno), errno);
328 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
332 ring->ring_start_addr = mmap (NULL, ring_sz, PROT_READ | PROT_WRITE,
333 MAP_SHARED | MAP_LOCKED, *fd, 0);
334 if (ring->ring_start_addr == MAP_FAILED)
336 vlib_log_err (apm->log_class, "mmap failure: %s (errno %d)",
337 strerror (errno), errno);
338 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
342 ring->ring_size = ring_sz;
355 af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
356 af_packet_create_if_arg_t *arg,
357 af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
360 af_packet_main_t *apm = &af_packet_main;
361 tpacket_req_u_t *rx_req = 0;
362 tpacket_req_u_t *tx_req = 0;
364 af_packet_ring_t ring = { 0 };
366 u32 rx_frames_per_block, tx_frames_per_block;
367 u32 rx_frame_size, tx_frame_size;
372 rx_frames_per_block = arg->rx_frames_per_block ?
373 arg->rx_frames_per_block :
374 ((apif->version == TPACKET_V3) ?
375 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK :
376 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2);
381 ((apif->version == TPACKET_V3) ? AF_PACKET_DEFAULT_RX_FRAME_SIZE :
382 AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2);
383 vec_validate (rx_queue->rx_req, 0);
384 rx_queue->rx_req->req.tp_block_size =
385 rx_frame_size * rx_frames_per_block;
386 rx_queue->rx_req->req.tp_frame_size = rx_frame_size;
387 rx_queue->rx_req->req.tp_block_nr = (apif->version == TPACKET_V3) ?
388 AF_PACKET_RX_BLOCK_NR :
389 AF_PACKET_RX_BLOCK_NR_V2;
390 rx_queue->rx_req->req.tp_frame_nr =
391 rx_queue->rx_req->req.tp_block_nr * rx_frames_per_block;
392 if (apif->version == TPACKET_V3)
394 rx_queue->rx_req->req3.tp_retire_blk_tov = 1; // 1 ms block timout
395 rx_queue->rx_req->req3.tp_feature_req_word = 0;
396 rx_queue->rx_req->req3.tp_sizeof_priv = 0;
398 rx_req = rx_queue->rx_req;
402 tx_frames_per_block = arg->tx_frames_per_block ?
403 arg->tx_frames_per_block :
404 AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK;
405 tx_frame_size = arg->tx_frame_size ? arg->tx_frame_size :
406 AF_PACKET_DEFAULT_TX_FRAME_SIZE;
408 vec_validate (tx_queue->tx_req, 0);
409 tx_queue->tx_req->req.tp_block_size =
410 tx_frame_size * tx_frames_per_block;
411 tx_queue->tx_req->req.tp_frame_size = tx_frame_size;
412 tx_queue->tx_req->req.tp_block_nr = AF_PACKET_TX_BLOCK_NR;
413 tx_queue->tx_req->req.tp_frame_nr =
414 AF_PACKET_TX_BLOCK_NR * tx_frames_per_block;
415 if (apif->version == TPACKET_V3)
417 tx_queue->tx_req->req3.tp_retire_blk_tov = 0;
418 tx_queue->tx_req->req3.tp_sizeof_priv = 0;
419 tx_queue->tx_req->req3.tp_feature_req_word = 0;
421 tx_req = tx_queue->tx_req;
424 if (rx_queue || tx_queue)
427 create_packet_sock (apif->host_if_index, rx_req, tx_req, &fd, &ring,
428 apif->dev_instance, &arg->flags, apif->version);
433 vec_add1 (apif->rings, ring);
434 ring_addr = ring.ring_start_addr;
440 vec_validate (rx_queue->rx_ring, rx_queue->rx_req->req.tp_block_nr - 1);
441 vec_foreach_index (i, rx_queue->rx_ring)
443 rx_queue->rx_ring[i] =
444 ring_addr + i * rx_queue->rx_req->req.tp_block_size;
447 rx_queue->next_rx_block = 0;
448 rx_queue->queue_id = queue_id;
449 rx_queue->is_rx_pending = 0;
450 ring_addr = ring_addr + rx_queue->rx_req->req.tp_block_size *
451 rx_queue->rx_req->req.tp_block_nr;
457 vec_validate (tx_queue->tx_ring, tx_queue->tx_req->req.tp_block_nr - 1);
458 vec_foreach_index (i, tx_queue->tx_ring)
460 tx_queue->tx_ring[i] =
461 ring_addr + i * tx_queue->tx_req->req.tp_block_size;
464 tx_queue->next_tx_frame = 0;
465 tx_queue->queue_id = queue_id;
466 tx_queue->is_tx_pending = 0;
467 clib_spinlock_init (&tx_queue->lockp);
472 vlib_log_err (apm->log_class, "Failed to set queue %u error", queue_id);
474 vec_free (rx_queue->rx_req);
476 vec_free (tx_queue->tx_req);
481 af_packet_device_init (vlib_main_t *vm, af_packet_if_t *apif,
482 af_packet_create_if_arg_t *args)
484 af_packet_main_t *apm = &af_packet_main;
485 af_packet_queue_t *rx_queue = 0;
486 af_packet_queue_t *tx_queue = 0;
487 u16 nq = clib_min (args->num_rxqs, args->num_txqs);
491 // enable fanout feature for multi-rxqs
492 if (args->num_rxqs > 1)
493 args->flags |= AF_PACKET_IF_FLAGS_FANOUT;
495 vec_validate (apif->rx_queues, args->num_rxqs - 1);
496 vec_validate (apif->tx_queues, args->num_txqs - 1);
500 rx_queue = vec_elt_at_index (apif->rx_queues, i);
501 tx_queue = vec_elt_at_index (apif->tx_queues, i);
502 ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i);
507 if (args->num_rxqs > args->num_txqs)
509 for (; i < args->num_rxqs; i++)
511 rx_queue = vec_elt_at_index (apif->rx_queues, i);
512 ret = af_packet_queue_init (vm, apif, args, rx_queue, 0, i);
517 else if (args->num_txqs > args->num_rxqs)
519 for (; i < args->num_txqs; i++)
521 tx_queue = vec_elt_at_index (apif->tx_queues, i);
522 ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i);
528 apif->num_rxqs = args->num_rxqs;
529 apif->num_txqs = args->num_txqs;
533 vlib_log_err (apm->log_class, "Failed to init device error");
538 af_packet_create_if (af_packet_create_if_arg_t *arg)
540 af_packet_main_t *apm = &af_packet_main;
541 vlib_main_t *vm = vlib_get_main ();
544 af_packet_if_t *apif = 0;
546 vnet_sw_interface_t *sw;
547 vnet_main_t *vnm = vnet_get_main ();
548 vnet_hw_if_caps_t caps = VNET_HW_IF_CAP_INT_MODE;
551 u8 *host_if_name_dup = 0;
552 int host_if_index = -1;
555 p = mhash_get (&apm->if_index_by_host_if_name, arg->host_if_name);
558 apif = vec_elt_at_index (apm->interfaces, p[0]);
559 arg->sw_if_index = apif->sw_if_index;
560 return VNET_API_ERROR_IF_ALREADY_EXISTS;
563 host_if_name_dup = vec_dup (arg->host_if_name);
566 * make sure host side of interface is 'UP' before binding AF_PACKET
569 if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
571 vlib_log_debug (apm->log_class,
572 "Failed to create AF_UNIX socket: %s (errno %d)",
573 strerror (errno), errno);
574 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
578 clib_memcpy (ifr.ifr_name, (const char *) arg->host_if_name,
579 vec_len (arg->host_if_name));
580 if (ioctl (fd2, SIOCGIFINDEX, &ifr) < 0)
584 "Failed to retrieve the interface (%s) index: %s (errno %d)",
585 arg->host_if_name, strerror (errno), errno);
586 ret = VNET_API_ERROR_INVALID_INTERFACE;
590 host_if_index = ifr.ifr_ifindex;
591 if (ioctl (fd2, SIOCGIFFLAGS, &ifr) < 0)
593 vlib_log_debug (apm->log_class,
594 "Failed to get the active flag: %s (errno %d)",
595 strerror (errno), errno);
596 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
600 if (!(ifr.ifr_flags & IFF_UP))
602 ifr.ifr_flags |= IFF_UP;
603 if (ioctl (fd2, SIOCSIFFLAGS, &ifr) < 0)
605 vlib_log_debug (apm->log_class,
606 "Failed to set the active flag: %s (errno %d)",
607 strerror (errno), errno);
608 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
619 ret = is_bridge (arg->host_if_name);
620 if (ret == 0) /* is a bridge, ignore state */
623 /* So far everything looks good, let's create interface */
624 pool_get (apm->interfaces, apif);
625 if_index = apif - apm->interfaces;
627 apif->dev_instance = if_index;
628 apif->host_if_index = host_if_index;
629 apif->host_if_name = host_if_name_dup;
630 apif->per_interface_next_index = ~0;
631 apif->mode = arg->mode;
634 apif->version = TPACKET_V2;
636 apif->version = TPACKET_V3;
638 ret = af_packet_device_init (vm, apif, arg);
642 ret = af_packet_read_mtu (apif);
647 if (apif->mode != AF_PACKET_IF_MODE_IP)
649 vnet_eth_interface_registration_t eir = {};
650 /*use configured or generate random MAC address */
652 clib_memcpy (hw_addr, arg->hw_addr, 6);
655 f64 now = vlib_time_now (vm);
657 rnd = (u32) (now * 1e6);
658 rnd = random_u32 (&rnd);
660 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
665 eir.dev_class_index = af_packet_device_class.index;
666 eir.dev_instance = apif->dev_instance;
667 eir.address = hw_addr;
668 eir.cb.set_max_frame_size = af_packet_eth_set_max_frame_size;
669 apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
673 apif->hw_if_index = vnet_register_interface (
674 vnm, af_packet_device_class.index, apif->dev_instance,
675 af_packet_ip_device_hw_interface_class.index, apif->dev_instance);
678 sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
679 apif->sw_if_index = sw->sw_if_index;
681 af_packet_set_rx_queues (vm, apif);
682 af_packet_set_tx_queues (vm, apif);
684 if (arg->flags & AF_PACKET_IF_FLAGS_FANOUT)
685 apif->is_fanout_enabled = 1;
687 apif->is_qdisc_bypass_enabled =
688 (arg->flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS);
690 if (arg->flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
691 apif->is_cksum_gso_enabled = 1;
693 if (apif->is_cksum_gso_enabled)
694 caps |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_IP4_CKSUM |
695 VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
697 vnet_hw_if_set_caps (vnm, apif->hw_if_index, caps);
698 vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
699 VNET_HW_INTERFACE_FLAG_LINK_UP);
701 mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
703 arg->sw_if_index = apif->sw_if_index;
713 vec_free (host_if_name_dup);
716 memset (apif, 0, sizeof (*apif));
717 pool_put (apm->interfaces, apif);
723 af_packet_rx_queue_free (af_packet_if_t *apif, af_packet_queue_t *rx_queue)
725 clib_file_del_by_index (&file_main, rx_queue->clib_file_index);
726 close (rx_queue->fd);
728 rx_queue->rx_ring = NULL;
729 vec_free (rx_queue->rx_req);
730 rx_queue->rx_req = NULL;
735 af_packet_tx_queue_free (af_packet_if_t *apif, af_packet_queue_t *tx_queue)
737 close (tx_queue->fd);
739 clib_spinlock_free (&tx_queue->lockp);
740 tx_queue->tx_ring = NULL;
741 vec_free (tx_queue->tx_req);
742 tx_queue->tx_req = NULL;
747 af_packet_ring_free (af_packet_if_t *apif, af_packet_ring_t *ring)
749 af_packet_main_t *apm = &af_packet_main;
753 // FIXME: unmap the memory
754 if (munmap (ring->ring_start_addr, ring->ring_size))
755 vlib_log_warn (apm->log_class,
756 "Host interface %s could not free ring %p of size %u",
757 apif->host_if_name, ring->ring_start_addr,
760 ring->ring_start_addr = 0;
767 af_packet_delete_if (u8 *host_if_name)
769 vnet_main_t *vnm = vnet_get_main ();
770 af_packet_main_t *apm = &af_packet_main;
771 af_packet_if_t *apif;
772 af_packet_queue_t *rx_queue;
773 af_packet_queue_t *tx_queue;
774 af_packet_ring_t *ring;
777 p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
780 vlib_log_warn (apm->log_class, "Host interface %s does not exist",
782 return VNET_API_ERROR_SYSCALL_ERROR_1;
784 apif = pool_elt_at_index (apm->interfaces, p[0]);
786 /* bring down the interface */
787 vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
790 vec_foreach (rx_queue, apif->rx_queues)
791 af_packet_rx_queue_free (apif, rx_queue);
792 vec_foreach (tx_queue, apif->tx_queues)
793 af_packet_tx_queue_free (apif, tx_queue);
794 vec_foreach (ring, apif->rings)
795 af_packet_ring_free (apif, ring);
797 vec_free (apif->rx_queues);
798 apif->rx_queues = NULL;
799 vec_free (apif->tx_queues);
800 apif->tx_queues = NULL;
801 vec_free (apif->rings);
804 vec_free (apif->host_if_name);
805 apif->host_if_name = NULL;
806 apif->host_if_index = -1;
808 mhash_unset (&apm->if_index_by_host_if_name, host_if_name, p);
810 if (apif->mode != AF_PACKET_IF_MODE_IP)
811 ethernet_delete_interface (vnm, apif->hw_if_index);
813 vnet_delete_hw_interface (vnm, apif->hw_if_index);
815 memset (apif, 0, sizeof (*apif));
816 pool_put (apm->interfaces, apif);
822 af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set)
829 af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
831 af_packet_main_t *apm = &af_packet_main;
832 af_packet_if_t *apif;
833 af_packet_if_detail_t *r_af_packet_ifs = NULL;
834 af_packet_if_detail_t *af_packet_if = NULL;
836 pool_foreach (apif, apm->interfaces)
838 vec_add2 (r_af_packet_ifs, af_packet_if, 1);
839 af_packet_if->sw_if_index = apif->sw_if_index;
840 if (apif->host_if_name)
842 clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
843 MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
844 strlen ((const char *) apif->host_if_name)));
848 *out_af_packet_ifs = r_af_packet_ifs;
853 static clib_error_t *
854 af_packet_init (vlib_main_t * vm)
856 af_packet_main_t *apm = &af_packet_main;
857 vlib_thread_main_t *tm = vlib_get_thread_main ();
859 clib_memset (apm, 0, sizeof (af_packet_main_t));
861 mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
863 vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
864 CLIB_CACHE_LINE_BYTES);
866 apm->log_class = vlib_log_register_class ("af_packet", 0);
867 vlib_log_debug (apm->log_class, "initialized");
872 VLIB_INIT_FUNCTION (af_packet_init);
875 * fd.io coding-style-patch-verification: ON
878 * eval: (c-set-style "gnu")