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.description =
173 format (0, "%U queue %u", format_af_packet_device_name,
174 apif->dev_instance, rx_queue->queue_id);
175 rx_queue->clib_file_index = clib_file_add (&file_main, &template);
177 vnet_hw_if_set_rx_queue_file_index (vnm, rx_queue->queue_index,
178 rx_queue->clib_file_index);
179 vnet_hw_if_set_rx_queue_mode (vnm, rx_queue->queue_index,
180 VNET_HW_IF_RX_MODE_INTERRUPT);
181 rx_queue->mode = VNET_HW_IF_RX_MODE_INTERRUPT;
183 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
187 af_packet_set_tx_queues (vlib_main_t *vm, af_packet_if_t *apif)
189 vnet_main_t *vnm = vnet_get_main ();
190 af_packet_main_t *apm = &af_packet_main;
191 af_packet_queue_t *tx_queue;
193 vec_foreach (tx_queue, apif->tx_queues)
195 tx_queue->queue_index = vnet_hw_if_register_tx_queue (
196 vnm, apif->hw_if_index, tx_queue->queue_id);
199 if (apif->num_txqs == 0)
201 vlib_log_err (apm->log_class, "Interface %U has 0 txq",
202 format_vnet_hw_if_index_name, vnm, apif->hw_if_index);
206 for (u32 j = 0; j < vlib_get_n_threads (); j++)
208 u32 qi = apif->tx_queues[j % apif->num_txqs].queue_index;
209 vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
212 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
216 create_packet_sock (int host_if_index, tpacket_req_u_t *rx_req,
217 tpacket_req_u_t *tx_req, int *fd, af_packet_ring_t *ring,
218 u32 fanout_id, af_packet_if_flags_t *flags, int ver)
220 af_packet_main_t *apm = &af_packet_main;
221 struct sockaddr_ll sll;
222 socklen_t req_sz = sizeof (tpacket_req3_t);
226 if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
228 vlib_log_err (apm->log_class,
229 "Failed to create AF_PACKET socket: %s (errno %d)",
230 strerror (errno), errno);
231 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
235 /* bind before rx ring is cfged so we don't receive packets from other interfaces */
236 clib_memset (&sll, 0, sizeof (sll));
237 sll.sll_family = PF_PACKET;
238 sll.sll_protocol = htons (ETH_P_ALL);
239 sll.sll_ifindex = host_if_index;
240 if (bind (*fd, (struct sockaddr *) &sll, sizeof (sll)) < 0)
242 vlib_log_err (apm->log_class,
243 "Failed to bind rx packet socket: %s (errno %d)",
244 strerror (errno), errno);
245 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
249 if (setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver)) < 0)
251 vlib_log_err (apm->log_class,
252 "Failed to set rx packet interface version: %s (errno %d)",
253 strerror (errno), errno);
254 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
259 if (setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt)) < 0)
263 "Failed to set packet tx ring error handling option: %s (errno %d)",
264 strerror (errno), errno);
265 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
269 if (*flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
273 if (setsockopt (*fd, SOL_PACKET, PACKET_VNET_HDR, &opt2, sizeof (opt2)) <
277 *flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
278 vlib_log_debug (apm->log_class,
279 "Failed to set packet vnet hdr error handling "
280 "option: %s (errno %d)",
281 strerror (errno), errno);
285 #if defined(PACKET_QDISC_BYPASS)
286 if (*flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS)
287 /* Introduced with Linux 3.14 so the ifdef should eventually be removed */
288 if (setsockopt (*fd, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof (opt)) <
292 *flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
293 vlib_log_debug (apm->log_class,
294 "Failed to set qdisc bypass error "
295 "handling option: %s (errno %d)",
296 strerror (errno), errno);
302 if (*flags & AF_PACKET_IF_FLAGS_FANOUT)
304 int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
305 if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
306 sizeof (fanout)) < 0)
309 *flags &= ~AF_PACKET_IF_FLAGS_FANOUT;
310 vlib_log_err (apm->log_class,
311 "Failed to set fanout options: %s (errno %d)",
312 strerror (errno), errno);
313 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
317 if (ver == TPACKET_V2)
319 req_sz = sizeof (tpacket_req_t);
320 ring_sz += rx_req->req.tp_block_size * rx_req->req.tp_block_nr;
323 ring_sz += rx_req->req3.tp_block_size * rx_req->req3.tp_block_nr;
324 if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
326 vlib_log_err (apm->log_class,
327 "Failed to set packet rx ring options: %s (errno %d)",
328 strerror (errno), errno);
329 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
336 if (ver == TPACKET_V2)
338 req_sz = sizeof (tpacket_req_t);
339 ring_sz += tx_req->req.tp_block_size * tx_req->req.tp_block_nr;
342 ring_sz += tx_req->req3.tp_block_size * tx_req->req3.tp_block_nr;
343 if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
345 vlib_log_err (apm->log_class,
346 "Failed to set packet tx ring options: %s (errno %d)",
347 strerror (errno), errno);
348 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
352 ring->ring_start_addr = mmap (NULL, ring_sz, PROT_READ | PROT_WRITE,
353 MAP_SHARED | MAP_LOCKED, *fd, 0);
354 if (ring->ring_start_addr == MAP_FAILED)
356 vlib_log_err (apm->log_class, "mmap failure: %s (errno %d)",
357 strerror (errno), errno);
358 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
362 ring->ring_size = ring_sz;
375 af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
376 af_packet_create_if_arg_t *arg,
377 af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
380 af_packet_main_t *apm = &af_packet_main;
381 tpacket_req_u_t *rx_req = 0;
382 tpacket_req_u_t *tx_req = 0;
384 af_packet_ring_t ring = { 0 };
386 u32 rx_frames_per_block, tx_frames_per_block;
387 u32 rx_frame_size, tx_frame_size;
392 rx_frames_per_block = arg->rx_frames_per_block ?
393 arg->rx_frames_per_block :
394 ((apif->version == TPACKET_V3) ?
395 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK :
396 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2);
401 ((apif->version == TPACKET_V3) ? AF_PACKET_DEFAULT_RX_FRAME_SIZE :
402 AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2);
403 vec_validate (rx_queue->rx_req, 0);
404 rx_queue->rx_req->req.tp_block_size =
405 rx_frame_size * rx_frames_per_block;
406 rx_queue->rx_req->req.tp_frame_size = rx_frame_size;
407 rx_queue->rx_req->req.tp_block_nr = (apif->version == TPACKET_V3) ?
408 AF_PACKET_RX_BLOCK_NR :
409 AF_PACKET_RX_BLOCK_NR_V2;
410 rx_queue->rx_req->req.tp_frame_nr =
411 rx_queue->rx_req->req.tp_block_nr * rx_frames_per_block;
412 if (apif->version == TPACKET_V3)
414 rx_queue->rx_req->req3.tp_retire_blk_tov = 1; // 1 ms block timout
415 rx_queue->rx_req->req3.tp_feature_req_word = 0;
416 rx_queue->rx_req->req3.tp_sizeof_priv = 0;
418 rx_req = rx_queue->rx_req;
422 tx_frames_per_block = arg->tx_frames_per_block ?
423 arg->tx_frames_per_block :
424 AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK;
425 tx_frame_size = arg->tx_frame_size ? arg->tx_frame_size :
426 AF_PACKET_DEFAULT_TX_FRAME_SIZE;
428 vec_validate (tx_queue->tx_req, 0);
429 tx_queue->tx_req->req.tp_block_size =
430 tx_frame_size * tx_frames_per_block;
431 tx_queue->tx_req->req.tp_frame_size = tx_frame_size;
432 tx_queue->tx_req->req.tp_block_nr = AF_PACKET_TX_BLOCK_NR;
433 tx_queue->tx_req->req.tp_frame_nr =
434 AF_PACKET_TX_BLOCK_NR * tx_frames_per_block;
435 if (apif->version == TPACKET_V3)
437 tx_queue->tx_req->req3.tp_retire_blk_tov = 0;
438 tx_queue->tx_req->req3.tp_sizeof_priv = 0;
439 tx_queue->tx_req->req3.tp_feature_req_word = 0;
441 tx_req = tx_queue->tx_req;
444 if (rx_queue || tx_queue)
447 create_packet_sock (apif->host_if_index, rx_req, tx_req, &fd, &ring,
448 apif->dev_instance, &arg->flags, apif->version);
453 vec_add1 (apif->fds, fd);
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;
577 p = mhash_get (&apm->if_index_by_host_if_name, arg->host_if_name);
580 apif = vec_elt_at_index (apm->interfaces, p[0]);
581 arg->sw_if_index = apif->sw_if_index;
582 return VNET_API_ERROR_IF_ALREADY_EXISTS;
585 host_if_name_dup = vec_dup (arg->host_if_name);
588 * make sure host side of interface is 'UP' before binding AF_PACKET
591 if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
593 vlib_log_debug (apm->log_class,
594 "Failed to create AF_UNIX socket: %s (errno %d)",
595 strerror (errno), errno);
596 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
600 clib_memcpy (ifr.ifr_name, (const char *) arg->host_if_name,
601 vec_len (arg->host_if_name));
602 if (ioctl (fd2, SIOCGIFINDEX, &ifr) < 0)
606 "Failed to retrieve the interface (%s) index: %s (errno %d)",
607 arg->host_if_name, strerror (errno), errno);
608 ret = VNET_API_ERROR_INVALID_INTERFACE;
612 host_if_index = ifr.ifr_ifindex;
613 if (ioctl (fd2, SIOCGIFFLAGS, &ifr) < 0)
615 vlib_log_debug (apm->log_class,
616 "Failed to get the active flag: %s (errno %d)",
617 strerror (errno), errno);
618 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
622 if (!(ifr.ifr_flags & IFF_UP))
624 ifr.ifr_flags |= IFF_UP;
625 if (ioctl (fd2, SIOCSIFFLAGS, &ifr) < 0)
627 vlib_log_debug (apm->log_class,
628 "Failed to set the active flag: %s (errno %d)",
629 strerror (errno), errno);
630 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
641 ret = is_bridge (arg->host_if_name);
642 if (ret == 0) /* is a bridge, ignore state */
645 /* So far everything looks good, let's create interface */
646 pool_get (apm->interfaces, apif);
647 if_index = apif - apm->interfaces;
649 apif->dev_instance = if_index;
650 apif->host_if_index = host_if_index;
651 apif->host_if_name = host_if_name_dup;
652 apif->per_interface_next_index = ~0;
653 apif->mode = arg->mode;
656 apif->version = TPACKET_V2;
658 apif->version = TPACKET_V3;
660 ret = af_packet_device_init (vm, apif, arg);
664 ret = af_packet_read_mtu (apif);
669 if (apif->mode != AF_PACKET_IF_MODE_IP)
671 vnet_eth_interface_registration_t eir = {};
672 /*use configured or generate random MAC address */
674 clib_memcpy (hw_addr, arg->hw_addr, 6);
677 f64 now = vlib_time_now (vm);
679 rnd = (u32) (now * 1e6);
680 rnd = random_u32 (&rnd);
682 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
687 eir.dev_class_index = af_packet_device_class.index;
688 eir.dev_instance = apif->dev_instance;
689 eir.address = hw_addr;
690 eir.cb.set_max_frame_size = af_packet_eth_set_max_frame_size;
691 apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
695 apif->hw_if_index = vnet_register_interface (
696 vnm, af_packet_device_class.index, apif->dev_instance,
697 af_packet_ip_device_hw_interface_class.index, apif->dev_instance);
700 sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
701 apif->sw_if_index = sw->sw_if_index;
703 af_packet_set_rx_queues (vm, apif);
704 af_packet_set_tx_queues (vm, apif);
706 if (arg->flags & AF_PACKET_IF_FLAGS_FANOUT)
707 apif->is_fanout_enabled = 1;
709 apif->is_qdisc_bypass_enabled =
710 (arg->flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS);
712 if (arg->flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
713 apif->is_cksum_gso_enabled = 1;
715 if (apif->is_cksum_gso_enabled)
716 caps |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_IP4_CKSUM |
717 VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
719 vnet_hw_if_set_caps (vnm, apif->hw_if_index, caps);
720 vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
721 VNET_HW_INTERFACE_FLAG_LINK_UP);
723 mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
725 arg->sw_if_index = apif->sw_if_index;
735 vec_foreach_index (i, apif->fds)
736 if (apif->fds[i] != -1)
737 close (apif->fds[i]);
738 vec_free (apif->fds);
739 vec_free (host_if_name_dup);
742 memset (apif, 0, sizeof (*apif));
743 pool_put (apm->interfaces, apif);
749 af_packet_rx_queue_free (af_packet_if_t *apif, af_packet_queue_t *rx_queue)
751 clib_file_del_by_index (&file_main, rx_queue->clib_file_index);
753 rx_queue->rx_ring = NULL;
754 vec_free (rx_queue->rx_req);
755 rx_queue->rx_req = NULL;
760 af_packet_tx_queue_free (af_packet_if_t *apif, af_packet_queue_t *tx_queue)
763 clib_spinlock_free (&tx_queue->lockp);
764 tx_queue->tx_ring = NULL;
765 vec_free (tx_queue->tx_req);
766 tx_queue->tx_req = NULL;
771 af_packet_ring_free (af_packet_if_t *apif, af_packet_ring_t *ring)
773 af_packet_main_t *apm = &af_packet_main;
777 // FIXME: unmap the memory
778 if (munmap (ring->ring_start_addr, ring->ring_size))
779 vlib_log_warn (apm->log_class,
780 "Host interface %s could not free ring %p of size %u",
781 apif->host_if_name, ring->ring_start_addr,
784 ring->ring_start_addr = 0;
791 af_packet_delete_if (u8 *host_if_name)
793 vnet_main_t *vnm = vnet_get_main ();
794 af_packet_main_t *apm = &af_packet_main;
795 af_packet_if_t *apif;
796 af_packet_queue_t *rx_queue;
797 af_packet_queue_t *tx_queue;
798 af_packet_ring_t *ring;
802 p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
805 vlib_log_warn (apm->log_class, "Host interface %s does not exist",
807 return VNET_API_ERROR_SYSCALL_ERROR_1;
809 apif = pool_elt_at_index (apm->interfaces, p[0]);
811 /* bring down the interface */
812 vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
813 if (apif->mode != AF_PACKET_IF_MODE_IP)
814 ethernet_delete_interface (vnm, apif->hw_if_index);
816 vnet_delete_hw_interface (vnm, apif->hw_if_index);
819 vec_foreach_index (i, apif->fds)
820 if (apif->fds[i] != -1)
821 close (apif->fds[i]);
822 vec_foreach (rx_queue, apif->rx_queues)
823 af_packet_rx_queue_free (apif, rx_queue);
824 vec_foreach (tx_queue, apif->tx_queues)
825 af_packet_tx_queue_free (apif, tx_queue);
826 vec_foreach (ring, apif->rings)
827 af_packet_ring_free (apif, ring);
829 vec_free (apif->fds);
831 vec_free (apif->rx_queues);
832 apif->rx_queues = NULL;
833 vec_free (apif->tx_queues);
834 apif->tx_queues = NULL;
835 vec_free (apif->rings);
838 vec_free (apif->host_if_name);
839 apif->host_if_name = NULL;
840 apif->host_if_index = -1;
842 mhash_unset (&apm->if_index_by_host_if_name, host_if_name, p);
844 memset (apif, 0, sizeof (*apif));
845 pool_put (apm->interfaces, apif);
851 af_packet_enable_disable_qdisc_bypass (u32 sw_if_index, u8 enable_disable)
853 af_packet_main_t *apm = &af_packet_main;
854 af_packet_if_t *apif;
855 vnet_main_t *vnm = vnet_get_main ();
856 vnet_hw_interface_t *hw;
859 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
861 if (hw->dev_class_index != af_packet_device_class.index)
862 return VNET_API_ERROR_INVALID_INTERFACE;
864 apif = pool_elt_at_index (apm->interfaces, hw->dev_instance);
866 #if defined(PACKET_QDISC_BYPASS)
867 vec_foreach_index (i, apif->fds)
873 /* Introduced with Linux 3.14 so the ifdef should eventually be
875 if (setsockopt (apif->fds[i], SOL_PACKET, PACKET_QDISC_BYPASS, &opt,
878 vlib_log_err (apm->log_class,
879 "Failed to enable qdisc bypass error "
880 "handling option: %s (errno %d)",
881 strerror (errno), errno);
883 apif->is_qdisc_bypass_enabled = 1;
888 if (setsockopt (apif->fds[i], SOL_PACKET, PACKET_QDISC_BYPASS, &opt,
891 vlib_log_err (apm->log_class,
892 "Failed to disable qdisc bypass error "
893 "handling option: %s (errno %d)",
894 strerror (errno), errno);
896 apif->is_qdisc_bypass_enabled = 0;
905 af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set)
912 af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
914 af_packet_main_t *apm = &af_packet_main;
915 af_packet_if_t *apif;
916 af_packet_if_detail_t *r_af_packet_ifs = NULL;
917 af_packet_if_detail_t *af_packet_if = NULL;
919 pool_foreach (apif, apm->interfaces)
921 vec_add2 (r_af_packet_ifs, af_packet_if, 1);
922 af_packet_if->sw_if_index = apif->sw_if_index;
923 if (apif->host_if_name)
925 clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
926 MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
927 strlen ((const char *) apif->host_if_name)));
931 *out_af_packet_ifs = r_af_packet_ifs;
936 static clib_error_t *
937 af_packet_init (vlib_main_t * vm)
939 af_packet_main_t *apm = &af_packet_main;
940 vlib_thread_main_t *tm = vlib_get_thread_main ();
942 clib_memset (apm, 0, sizeof (af_packet_main_t));
944 mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
946 vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
947 CLIB_CACHE_LINE_BYTES);
949 apm->log_class = vlib_log_register_class ("af_packet", 0);
950 vlib_log_debug (apm->log_class, "initialized");
955 VLIB_INIT_FUNCTION (af_packet_init);
958 * fd.io coding-style-patch-verification: ON
961 * eval: (c-set-style "gnu")