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 <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);
113 static clib_error_t *
114 af_packet_fd_error (clib_file_t *uf)
116 af_packet_main_t *apm = &af_packet_main;
117 clib_error_t *err = 0;
120 int ret = read (uf->file_descriptor, (char *) &u64, sizeof (u64));
124 err = clib_error_return_unix (0, "");
125 vlib_log_notice (apm->log_class, "fd %u %U", uf->file_descriptor,
126 format_clib_error, err);
127 clib_error_free (err);
134 is_bridge (const u8 * host_if_name)
139 s = format (0, "/sys/class/net/%s/bridge%c", host_if_name, 0);
140 dir = opendir ((char *) s);
153 af_packet_set_rx_queues (vlib_main_t *vm, af_packet_if_t *apif)
155 vnet_main_t *vnm = vnet_get_main ();
156 af_packet_queue_t *rx_queue;
158 vnet_hw_if_set_input_node (vnm, apif->hw_if_index,
159 af_packet_input_node.index);
161 vec_foreach (rx_queue, apif->rx_queues)
163 rx_queue->queue_index = vnet_hw_if_register_rx_queue (
164 vnm, apif->hw_if_index, rx_queue->queue_id, VNET_HW_IF_RXQ_THREAD_ANY);
167 clib_file_t template = { 0 };
168 template.read_function = af_packet_fd_read_ready;
169 template.error_function = af_packet_fd_error;
170 template.file_descriptor = rx_queue->fd;
171 template.private_data = rx_queue->queue_index;
172 template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
173 template.description =
174 format (0, "%U queue %u", format_af_packet_device_name,
175 apif->dev_instance, rx_queue->queue_id);
176 rx_queue->clib_file_index = clib_file_add (&file_main, &template);
178 vnet_hw_if_set_rx_queue_file_index (vnm, rx_queue->queue_index,
179 rx_queue->clib_file_index);
180 vnet_hw_if_set_rx_queue_mode (vnm, rx_queue->queue_index,
181 VNET_HW_IF_RX_MODE_INTERRUPT);
182 rx_queue->mode = VNET_HW_IF_RX_MODE_INTERRUPT;
184 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
188 af_packet_set_tx_queues (vlib_main_t *vm, af_packet_if_t *apif)
190 vnet_main_t *vnm = vnet_get_main ();
191 af_packet_main_t *apm = &af_packet_main;
192 af_packet_queue_t *tx_queue;
194 vec_foreach (tx_queue, apif->tx_queues)
196 tx_queue->queue_index = vnet_hw_if_register_tx_queue (
197 vnm, apif->hw_if_index, tx_queue->queue_id);
200 if (apif->num_txqs == 0)
202 vlib_log_err (apm->log_class, "Interface %U has 0 txq",
203 format_vnet_hw_if_index_name, vnm, apif->hw_if_index);
207 for (u32 j = 0; j < vlib_get_n_threads (); j++)
209 u32 qi = apif->tx_queues[j % apif->num_txqs].queue_index;
210 vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
213 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
217 create_packet_sock (int host_if_index, tpacket_req_u_t *rx_req,
218 tpacket_req_u_t *tx_req, int *fd, af_packet_ring_t *ring,
219 u32 fanout_id, af_packet_if_flags_t *flags, int ver)
221 af_packet_main_t *apm = &af_packet_main;
222 struct sockaddr_ll sll;
223 socklen_t req_sz = sizeof (tpacket_req3_t);
227 if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
229 vlib_log_err (apm->log_class,
230 "Failed to create AF_PACKET socket: %s (errno %d)",
231 strerror (errno), errno);
232 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
236 /* bind before rx ring is cfged so we don't receive packets from other interfaces */
237 clib_memset (&sll, 0, sizeof (sll));
238 sll.sll_family = PF_PACKET;
239 sll.sll_protocol = htons (ETH_P_ALL);
240 sll.sll_ifindex = host_if_index;
241 if (bind (*fd, (struct sockaddr *) &sll, sizeof (sll)) < 0)
243 vlib_log_err (apm->log_class,
244 "Failed to bind rx packet socket: %s (errno %d)",
245 strerror (errno), errno);
246 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
250 if (setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver)) < 0)
252 vlib_log_err (apm->log_class,
253 "Failed to set rx packet interface version: %s (errno %d)",
254 strerror (errno), errno);
255 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
260 if (setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt)) < 0)
264 "Failed to set packet tx ring error handling option: %s (errno %d)",
265 strerror (errno), errno);
266 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
270 if (*flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
274 if (setsockopt (*fd, SOL_PACKET, PACKET_VNET_HDR, &opt2, sizeof (opt2)) <
278 *flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
279 vlib_log_debug (apm->log_class,
280 "Failed to set packet vnet hdr error handling "
281 "option: %s (errno %d)",
282 strerror (errno), errno);
286 #if defined(PACKET_QDISC_BYPASS)
287 if (*flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS)
288 /* Introduced with Linux 3.14 so the ifdef should eventually be removed */
289 if (setsockopt (*fd, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof (opt)) <
293 *flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
294 vlib_log_debug (apm->log_class,
295 "Failed to set qdisc bypass error "
296 "handling option: %s (errno %d)",
297 strerror (errno), errno);
303 if (*flags & AF_PACKET_IF_FLAGS_FANOUT)
305 int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
306 if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
307 sizeof (fanout)) < 0)
310 *flags &= ~AF_PACKET_IF_FLAGS_FANOUT;
311 vlib_log_err (apm->log_class,
312 "Failed to set fanout options: %s (errno %d)",
313 strerror (errno), errno);
314 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
318 if (ver == TPACKET_V2)
320 req_sz = sizeof (tpacket_req_t);
321 ring_sz += rx_req->req.tp_block_size * rx_req->req.tp_block_nr;
324 ring_sz += rx_req->req3.tp_block_size * rx_req->req3.tp_block_nr;
325 if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
327 vlib_log_err (apm->log_class,
328 "Failed to set packet rx ring options: %s (errno %d)",
329 strerror (errno), errno);
330 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
337 if (ver == TPACKET_V2)
339 req_sz = sizeof (tpacket_req_t);
340 ring_sz += tx_req->req.tp_block_size * tx_req->req.tp_block_nr;
343 ring_sz += tx_req->req3.tp_block_size * tx_req->req3.tp_block_nr;
344 if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
346 vlib_log_err (apm->log_class,
347 "Failed to set packet tx ring options: %s (errno %d)",
348 strerror (errno), errno);
349 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
353 ring->ring_start_addr = mmap (NULL, ring_sz, PROT_READ | PROT_WRITE,
354 MAP_SHARED | MAP_LOCKED, *fd, 0);
355 if (ring->ring_start_addr == MAP_FAILED)
357 vlib_log_err (apm->log_class, "mmap failure: %s (errno %d)",
358 strerror (errno), errno);
359 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
363 ring->ring_size = ring_sz;
376 af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
377 af_packet_create_if_arg_t *arg,
378 af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
381 af_packet_main_t *apm = &af_packet_main;
382 tpacket_req_u_t *rx_req = 0;
383 tpacket_req_u_t *tx_req = 0;
385 af_packet_ring_t ring = { 0 };
387 u32 rx_frames_per_block, tx_frames_per_block;
388 u32 rx_frame_size, tx_frame_size;
393 rx_frames_per_block = arg->rx_frames_per_block ?
394 arg->rx_frames_per_block :
395 ((apif->version == TPACKET_V3) ?
396 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK :
397 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2);
402 ((apif->version == TPACKET_V3) ? AF_PACKET_DEFAULT_RX_FRAME_SIZE :
403 AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2);
404 vec_validate (rx_queue->rx_req, 0);
405 rx_queue->rx_req->req.tp_block_size =
406 rx_frame_size * rx_frames_per_block;
407 rx_queue->rx_req->req.tp_frame_size = rx_frame_size;
408 rx_queue->rx_req->req.tp_block_nr = (apif->version == TPACKET_V3) ?
409 AF_PACKET_RX_BLOCK_NR :
410 AF_PACKET_RX_BLOCK_NR_V2;
411 rx_queue->rx_req->req.tp_frame_nr =
412 rx_queue->rx_req->req.tp_block_nr * rx_frames_per_block;
413 if (apif->version == TPACKET_V3)
415 rx_queue->rx_req->req3.tp_retire_blk_tov = 1; // 1 ms block timout
416 rx_queue->rx_req->req3.tp_feature_req_word = 0;
417 rx_queue->rx_req->req3.tp_sizeof_priv = 0;
419 rx_req = rx_queue->rx_req;
423 tx_frames_per_block = arg->tx_frames_per_block ?
424 arg->tx_frames_per_block :
425 AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK;
426 tx_frame_size = arg->tx_frame_size ? arg->tx_frame_size :
427 AF_PACKET_DEFAULT_TX_FRAME_SIZE;
429 vec_validate (tx_queue->tx_req, 0);
430 tx_queue->tx_req->req.tp_block_size =
431 tx_frame_size * tx_frames_per_block;
432 tx_queue->tx_req->req.tp_frame_size = tx_frame_size;
433 tx_queue->tx_req->req.tp_block_nr = AF_PACKET_TX_BLOCK_NR;
434 tx_queue->tx_req->req.tp_frame_nr =
435 AF_PACKET_TX_BLOCK_NR * tx_frames_per_block;
436 if (apif->version == TPACKET_V3)
438 tx_queue->tx_req->req3.tp_retire_blk_tov = 0;
439 tx_queue->tx_req->req3.tp_sizeof_priv = 0;
440 tx_queue->tx_req->req3.tp_feature_req_word = 0;
442 tx_req = tx_queue->tx_req;
445 if (rx_queue || tx_queue)
448 create_packet_sock (apif->host_if_index, rx_req, tx_req, &fd, &ring,
449 apif->dev_instance, &arg->flags, apif->version);
454 vec_add1 (apif->rings, ring);
455 ring_addr = ring.ring_start_addr;
461 vec_validate (rx_queue->rx_ring, rx_queue->rx_req->req.tp_block_nr - 1);
462 vec_foreach_index (i, rx_queue->rx_ring)
464 rx_queue->rx_ring[i] =
465 ring_addr + i * rx_queue->rx_req->req.tp_block_size;
468 rx_queue->next_rx_block = 0;
469 rx_queue->queue_id = queue_id;
470 rx_queue->is_rx_pending = 0;
471 ring_addr = ring_addr + rx_queue->rx_req->req.tp_block_size *
472 rx_queue->rx_req->req.tp_block_nr;
478 vec_validate (tx_queue->tx_ring, tx_queue->tx_req->req.tp_block_nr - 1);
479 vec_foreach_index (i, tx_queue->tx_ring)
481 tx_queue->tx_ring[i] =
482 ring_addr + i * tx_queue->tx_req->req.tp_block_size;
485 tx_queue->next_tx_frame = 0;
486 tx_queue->queue_id = queue_id;
487 tx_queue->is_tx_pending = 0;
488 clib_spinlock_init (&tx_queue->lockp);
493 vlib_log_err (apm->log_class, "Failed to set queue %u error", queue_id);
495 vec_free (rx_queue->rx_req);
497 vec_free (tx_queue->tx_req);
502 af_packet_device_init (vlib_main_t *vm, af_packet_if_t *apif,
503 af_packet_create_if_arg_t *args)
505 af_packet_main_t *apm = &af_packet_main;
506 af_packet_queue_t *rx_queue = 0;
507 af_packet_queue_t *tx_queue = 0;
508 u16 nq = clib_min (args->num_rxqs, args->num_txqs);
512 // enable fanout feature for multi-rxqs
513 if (args->num_rxqs > 1)
514 args->flags |= AF_PACKET_IF_FLAGS_FANOUT;
516 vec_validate (apif->rx_queues, args->num_rxqs - 1);
517 vec_validate (apif->tx_queues, args->num_txqs - 1);
521 rx_queue = vec_elt_at_index (apif->rx_queues, i);
522 tx_queue = vec_elt_at_index (apif->tx_queues, i);
523 ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i);
528 if (args->num_rxqs > args->num_txqs)
530 for (; i < args->num_rxqs; i++)
532 rx_queue = vec_elt_at_index (apif->rx_queues, i);
533 ret = af_packet_queue_init (vm, apif, args, rx_queue, 0, i);
538 else if (args->num_txqs > args->num_rxqs)
540 for (; i < args->num_txqs; i++)
542 tx_queue = vec_elt_at_index (apif->tx_queues, i);
543 ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i);
549 apif->num_rxqs = args->num_rxqs;
550 apif->num_txqs = args->num_txqs;
554 vlib_log_err (apm->log_class, "Failed to init device error");
559 af_packet_create_if (af_packet_create_if_arg_t *arg)
561 af_packet_main_t *apm = &af_packet_main;
562 vlib_main_t *vm = vlib_get_main ();
565 af_packet_if_t *apif = 0;
567 vnet_sw_interface_t *sw;
568 vnet_main_t *vnm = vnet_get_main ();
569 vnet_hw_if_caps_t caps = VNET_HW_IF_CAP_INT_MODE;
572 u8 *host_if_name_dup = 0;
573 int host_if_index = -1;
576 p = mhash_get (&apm->if_index_by_host_if_name, arg->host_if_name);
579 apif = vec_elt_at_index (apm->interfaces, p[0]);
580 arg->sw_if_index = apif->sw_if_index;
581 return VNET_API_ERROR_IF_ALREADY_EXISTS;
584 host_if_name_dup = vec_dup (arg->host_if_name);
587 * make sure host side of interface is 'UP' before binding AF_PACKET
590 if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
592 vlib_log_debug (apm->log_class,
593 "Failed to create AF_UNIX socket: %s (errno %d)",
594 strerror (errno), errno);
595 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
599 clib_memcpy (ifr.ifr_name, (const char *) arg->host_if_name,
600 vec_len (arg->host_if_name));
601 if (ioctl (fd2, SIOCGIFINDEX, &ifr) < 0)
605 "Failed to retrieve the interface (%s) index: %s (errno %d)",
606 arg->host_if_name, strerror (errno), errno);
607 ret = VNET_API_ERROR_INVALID_INTERFACE;
611 host_if_index = ifr.ifr_ifindex;
612 if (ioctl (fd2, SIOCGIFFLAGS, &ifr) < 0)
614 vlib_log_debug (apm->log_class,
615 "Failed to get the active flag: %s (errno %d)",
616 strerror (errno), errno);
617 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
621 if (!(ifr.ifr_flags & IFF_UP))
623 ifr.ifr_flags |= IFF_UP;
624 if (ioctl (fd2, SIOCSIFFLAGS, &ifr) < 0)
626 vlib_log_debug (apm->log_class,
627 "Failed to set the active flag: %s (errno %d)",
628 strerror (errno), errno);
629 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
640 ret = is_bridge (arg->host_if_name);
641 if (ret == 0) /* is a bridge, ignore state */
644 /* So far everything looks good, let's create interface */
645 pool_get (apm->interfaces, apif);
646 if_index = apif - apm->interfaces;
648 apif->dev_instance = if_index;
649 apif->host_if_index = host_if_index;
650 apif->host_if_name = host_if_name_dup;
651 apif->per_interface_next_index = ~0;
652 apif->mode = arg->mode;
655 apif->version = TPACKET_V2;
657 apif->version = TPACKET_V3;
659 ret = af_packet_device_init (vm, apif, arg);
663 ret = af_packet_read_mtu (apif);
668 if (apif->mode != AF_PACKET_IF_MODE_IP)
670 vnet_eth_interface_registration_t eir = {};
671 /*use configured or generate random MAC address */
673 clib_memcpy (hw_addr, arg->hw_addr, 6);
676 f64 now = vlib_time_now (vm);
678 rnd = (u32) (now * 1e6);
679 rnd = random_u32 (&rnd);
681 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
686 eir.dev_class_index = af_packet_device_class.index;
687 eir.dev_instance = apif->dev_instance;
688 eir.address = hw_addr;
689 eir.cb.set_max_frame_size = af_packet_eth_set_max_frame_size;
690 apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
694 apif->hw_if_index = vnet_register_interface (
695 vnm, af_packet_device_class.index, apif->dev_instance,
696 af_packet_ip_device_hw_interface_class.index, apif->dev_instance);
699 sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
700 apif->sw_if_index = sw->sw_if_index;
702 af_packet_set_rx_queues (vm, apif);
703 af_packet_set_tx_queues (vm, apif);
705 if (arg->flags & AF_PACKET_IF_FLAGS_FANOUT)
706 apif->is_fanout_enabled = 1;
708 apif->is_qdisc_bypass_enabled =
709 (arg->flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS);
711 if (arg->flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
712 apif->is_cksum_gso_enabled = 1;
714 if (apif->is_cksum_gso_enabled)
715 caps |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_IP4_CKSUM |
716 VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
718 vnet_hw_if_set_caps (vnm, apif->hw_if_index, caps);
719 vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
720 VNET_HW_INTERFACE_FLAG_LINK_UP);
722 mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
724 arg->sw_if_index = apif->sw_if_index;
734 vec_free (host_if_name_dup);
737 memset (apif, 0, sizeof (*apif));
738 pool_put (apm->interfaces, apif);
744 af_packet_rx_queue_free (af_packet_if_t *apif, af_packet_queue_t *rx_queue)
746 clib_file_del_by_index (&file_main, rx_queue->clib_file_index);
747 close (rx_queue->fd);
749 rx_queue->rx_ring = NULL;
750 vec_free (rx_queue->rx_req);
751 rx_queue->rx_req = NULL;
756 af_packet_tx_queue_free (af_packet_if_t *apif, af_packet_queue_t *tx_queue)
758 close (tx_queue->fd);
760 clib_spinlock_free (&tx_queue->lockp);
761 tx_queue->tx_ring = NULL;
762 vec_free (tx_queue->tx_req);
763 tx_queue->tx_req = NULL;
768 af_packet_ring_free (af_packet_if_t *apif, af_packet_ring_t *ring)
770 af_packet_main_t *apm = &af_packet_main;
774 // FIXME: unmap the memory
775 if (munmap (ring->ring_start_addr, ring->ring_size))
776 vlib_log_warn (apm->log_class,
777 "Host interface %s could not free ring %p of size %u",
778 apif->host_if_name, ring->ring_start_addr,
781 ring->ring_start_addr = 0;
788 af_packet_delete_if (u8 *host_if_name)
790 vnet_main_t *vnm = vnet_get_main ();
791 af_packet_main_t *apm = &af_packet_main;
792 af_packet_if_t *apif;
793 af_packet_queue_t *rx_queue;
794 af_packet_queue_t *tx_queue;
795 af_packet_ring_t *ring;
798 p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
801 vlib_log_warn (apm->log_class, "Host interface %s does not exist",
803 return VNET_API_ERROR_SYSCALL_ERROR_1;
805 apif = pool_elt_at_index (apm->interfaces, p[0]);
807 /* bring down the interface */
808 vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
809 if (apif->mode != AF_PACKET_IF_MODE_IP)
810 ethernet_delete_interface (vnm, apif->hw_if_index);
812 vnet_delete_hw_interface (vnm, apif->hw_if_index);
815 vec_foreach (rx_queue, apif->rx_queues)
816 af_packet_rx_queue_free (apif, rx_queue);
817 vec_foreach (tx_queue, apif->tx_queues)
818 af_packet_tx_queue_free (apif, tx_queue);
819 vec_foreach (ring, apif->rings)
820 af_packet_ring_free (apif, ring);
822 vec_free (apif->rx_queues);
823 apif->rx_queues = NULL;
824 vec_free (apif->tx_queues);
825 apif->tx_queues = NULL;
826 vec_free (apif->rings);
829 vec_free (apif->host_if_name);
830 apif->host_if_name = NULL;
831 apif->host_if_index = -1;
833 mhash_unset (&apm->if_index_by_host_if_name, host_if_name, p);
835 memset (apif, 0, sizeof (*apif));
836 pool_put (apm->interfaces, apif);
842 af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set)
849 af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
851 af_packet_main_t *apm = &af_packet_main;
852 af_packet_if_t *apif;
853 af_packet_if_detail_t *r_af_packet_ifs = NULL;
854 af_packet_if_detail_t *af_packet_if = NULL;
856 pool_foreach (apif, apm->interfaces)
858 vec_add2 (r_af_packet_ifs, af_packet_if, 1);
859 af_packet_if->sw_if_index = apif->sw_if_index;
860 if (apif->host_if_name)
862 clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
863 MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
864 strlen ((const char *) apif->host_if_name)));
868 *out_af_packet_ifs = r_af_packet_ifs;
873 static clib_error_t *
874 af_packet_init (vlib_main_t * vm)
876 af_packet_main_t *apm = &af_packet_main;
877 vlib_thread_main_t *tm = vlib_get_thread_main ();
879 clib_memset (apm, 0, sizeof (af_packet_main_t));
881 mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
883 vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
884 CLIB_CACHE_LINE_BYTES);
886 apm->log_class = vlib_log_register_class ("af_packet", 0);
887 vlib_log_debug (apm->log_class, "initialized");
892 VLIB_INIT_FUNCTION (af_packet_init);
895 * fd.io coding-style-patch-verification: ON
898 * eval: (c-set-style "gnu")