2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
22 #include <sys/types.h>
24 #include <sys/ioctl.h>
25 #include <sys/socket.h>
29 #include <sys/prctl.h>
30 #include <sys/eventfd.h>
34 #include <vlib/vlib.h>
35 #include <vlib/unix/unix.h>
36 #include <vppinfra/linux/syscall.h>
37 #include <vnet/plugin/plugin.h>
38 #include <vnet/ethernet/ethernet.h>
39 #include <vpp/app/version.h>
40 #include <memif/memif.h>
41 #include <memif/private.h>
43 memif_main_t memif_main;
46 memif_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
53 memif_queue_intfd_close (memif_queue_t * mq)
55 if (mq->int_clib_file_index != ~0)
57 memif_file_del_by_index (mq->int_clib_file_index);
58 mq->int_clib_file_index = ~0;
61 else if (mq->int_fd > -1)
69 memif_disconnect (memif_if_t * mif, clib_error_t * err)
71 memif_main_t *mm = &memif_main;
72 vnet_main_t *vnm = vnet_get_main ();
80 DBG ("disconnect %u (%v)", mif->dev_instance, err ? err->what : 0);
85 mif->local_disc_string = vec_dup (err->what);
86 if (mif->sock && clib_socket_is_connected (mif->sock))
87 e = memif_msg_send_disconnect (mif, err);
91 /* set interface down */
92 mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
93 if (mif->hw_if_index != ~0)
94 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
96 /* close connection socket */
97 if (mif->sock && mif->sock->fd)
99 memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files,
100 mif->socket_file_index);
101 hash_unset (msf->dev_instance_by_fd, mif->sock->fd);
102 memif_socket_close (&mif->sock);
107 err = clib_socket_close (mif->sock);
109 clib_error_report (err);
110 clib_mem_free (mif->sock);
113 vec_foreach_index (i, mif->rx_queues)
115 mq = vec_elt_at_index (mif->rx_queues, i);
119 rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i);
121 DBG ("Warning: unable to unassign interface %d, "
122 "queue %d: rc=%d", mif->hw_if_index, i, rv);
127 /* free tx and rx queues */
128 vec_foreach (mq, mif->rx_queues) memif_queue_intfd_close (mq);
129 vec_free (mif->rx_queues);
131 vec_foreach (mq, mif->tx_queues) memif_queue_intfd_close (mq);
132 vec_free (mif->tx_queues);
134 /* free memory regions */
135 vec_foreach (mr, mif->regions)
138 if ((rv = munmap (mr->shm, mr->region_size)))
139 clib_warning ("munmap failed, rv = %d", rv);
143 vec_free (mif->regions);
144 vec_free (mif->remote_name);
145 vec_free (mif->remote_if_name);
146 clib_fifo_free (mif->msg_queue);
149 static clib_error_t *
150 memif_int_fd_read_ready (clib_file_t * uf)
152 memif_main_t *mm = &memif_main;
153 vnet_main_t *vnm = vnet_get_main ();
154 u16 qid = uf->private_data & 0xFFFF;
155 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
156 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
160 size = read (uf->file_descriptor, &b, sizeof (b));
163 DBG_UNIX_LOG ("Failed to read from socket");
167 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, qid);
175 memif_connect (memif_if_t * mif)
177 vnet_main_t *vnm = vnet_get_main ();
178 clib_file_t template = { 0 };
182 DBG ("connect %u", mif->dev_instance);
184 vec_free (mif->local_disc_string);
185 vec_free (mif->remote_disc_string);
187 vec_foreach (mr, mif->regions)
193 clib_error_return (0, "no memory region fd");
195 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
196 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
197 return clib_error_return_unix (0, "mmap");
200 template.read_function = memif_int_fd_read_ready;
202 vec_foreach_index (i, mif->tx_queues)
204 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
206 mq->ring = mif->regions[mq->region].shm + mq->offset;
207 if (mq->ring->cookie != MEMIF_COOKIE)
208 return clib_error_return (0, "wrong cookie on tx ring %u", i);
211 vec_foreach_index (i, mif->rx_queues)
213 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
216 mq->ring = mif->regions[mq->region].shm + mq->offset;
217 if (mq->ring->cookie != MEMIF_COOKIE)
218 return clib_error_return (0, "wrong cookie on tx ring %u", i);
222 template.file_descriptor = mq->int_fd;
223 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
224 template.description = format (0, "%U rx %u int",
225 format_memif_device_name,
226 mif->dev_instance, i);
227 memif_file_add (&mq->int_clib_file_index, &template);
229 vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0);
230 rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i,
231 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
234 ("Warning: unable to set rx mode for interface %d queue %d: "
235 "rc=%d", mif->hw_if_index, i, rv);
238 vnet_hw_interface_rx_mode rxmode;
239 vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode);
241 if (rxmode == VNET_HW_INTERFACE_RX_MODE_POLLING)
242 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
246 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
247 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
249 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
250 VNET_HW_INTERFACE_FLAG_LINK_UP);
254 static_always_inline memif_ring_t *
255 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
257 if (vec_len (mif->regions) == 0)
259 void *p = mif->regions[0].shm;
261 sizeof (memif_ring_t) +
262 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
263 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
265 return (memif_ring_t *) p;
269 memif_init_regions_and_queues (memif_if_t * mif)
271 memif_ring_t *ring = NULL;
275 clib_mem_vm_alloc_t alloc = { 0 };
278 vec_validate_aligned (mif->regions, 0, CLIB_CACHE_LINE_BYTES);
279 r = vec_elt_at_index (mif->regions, 0);
281 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
282 (sizeof (memif_ring_t) +
283 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
285 r->region_size = buffer_offset +
286 mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
287 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
289 alloc.name = "memif region";
290 alloc.size = r->region_size;
291 alloc.flags = CLIB_MEM_VM_F_SHARED;
293 err = clib_mem_vm_ext_alloc (&alloc);
300 for (i = 0; i < mif->run.num_s2m_rings; i++)
302 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
303 ring->head = ring->tail = 0;
304 ring->cookie = MEMIF_COOKIE;
305 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
307 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
308 ring->desc[j].region = 0;
309 ring->desc[j].offset =
310 buffer_offset + (u32) (slot * mif->run.buffer_size);
311 ring->desc[j].buffer_length = mif->run.buffer_size;
314 for (i = 0; i < mif->run.num_m2s_rings; i++)
316 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
317 ring->head = ring->tail = 0;
318 ring->cookie = MEMIF_COOKIE;
319 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
322 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
323 ring->desc[j].region = 0;
324 ring->desc[j].offset =
325 buffer_offset + (u32) (slot * mif->run.buffer_size);
326 ring->desc[j].buffer_length = mif->run.buffer_size;
330 ASSERT (mif->tx_queues == 0);
331 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
332 CLIB_CACHE_LINE_BYTES);
333 vec_foreach_index (i, mif->tx_queues)
335 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
336 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
337 return clib_error_return_unix (0, "eventfd[tx queue %u]", i);
338 mq->int_clib_file_index = ~0;
339 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
340 mq->log2_ring_size = mif->cfg.log2_ring_size;
342 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
346 ASSERT (mif->rx_queues == 0);
347 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
348 CLIB_CACHE_LINE_BYTES);
349 vec_foreach_index (i, mif->rx_queues)
351 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
352 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
353 return clib_error_return_unix (0, "eventfd[rx queue %u]", i);
354 mq->int_clib_file_index = ~0;
355 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
356 mq->log2_ring_size = mif->cfg.log2_ring_size;
358 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
366 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
368 memif_main_t *mm = &memif_main;
371 uword *event_data = 0, event_type;
373 f64 start_time, last_run_duration = 0, now;
376 sock = clib_mem_alloc (sizeof (clib_socket_t));
377 memset (sock, 0, sizeof (clib_socket_t));
382 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
385 vlib_process_wait_for_event (vm);
387 event_type = vlib_process_get_events (vm, &event_data);
388 vec_reset_length (event_data);
394 case MEMIF_PROCESS_EVENT_START:
397 case MEMIF_PROCESS_EVENT_STOP:
404 last_run_duration = start_time = vlib_time_now (vm);
406 pool_foreach (mif, mm->interfaces,
408 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
409 /* Allow no more than 10us without a pause */
410 now = vlib_time_now (vm);
411 if (now > start_time + 10e-6)
413 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
414 start_time = vlib_time_now (vm);
417 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
420 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
423 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
426 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
428 memset (sock, 0, sizeof(clib_socket_t));
429 sock->config = (char *) msf->filename;
430 sock->flags = CLIB_SOCKET_F_IS_CLIENT| CLIB_SOCKET_F_SEQPACKET;
432 if ((err = clib_socket_init (sock)))
434 clib_error_free (err);
438 clib_file_t t = { 0 };
440 t.read_function = memif_slave_conn_fd_read_ready;
441 t.write_function = memif_slave_conn_fd_write_ready;
442 t.error_function = memif_slave_conn_fd_error;
443 t.file_descriptor = sock->fd;
444 t.private_data = mif->dev_instance;
445 memif_file_add (&sock->private_data, &t);
446 t.description = format (0, "%U ctl",
447 format_memif_device_name,
449 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
451 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
453 sock = clib_mem_alloc (sizeof(clib_socket_t));
458 last_run_duration = vlib_time_now (vm) - last_run_duration;
464 VLIB_REGISTER_NODE (memif_process_node,static) = {
465 .function = memif_process,
466 .type = VLIB_NODE_TYPE_PROCESS,
467 .name = "memif-process",
473 memif_add_socket_file (u32 sock_id, u8 * socket_filename)
475 memif_main_t *mm = &memif_main;
477 memif_socket_file_t *msf;
479 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
482 msf = pool_elt_at_index (mm->socket_files, *p);
483 if (strcmp ((char *) msf->filename, (char *) socket_filename) == 0)
485 /* Silently accept identical "add". */
489 /* But don't allow a direct add of a different filename. */
490 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
493 DBG ("creating socket file (uninitialized) %s", msf->filename);
495 pool_get (mm->socket_files, msf);
496 memset (msf, 0, sizeof (memif_socket_file_t));
498 msf->filename = socket_filename;
499 msf->socket_id = sock_id;
501 hash_set (mm->socket_file_index_by_sock_id, sock_id,
502 msf - mm->socket_files);
508 memif_delete_socket_file (u32 sock_id)
510 memif_main_t *mm = &memif_main;
512 memif_socket_file_t *msf;
514 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
517 /* Don't delete non-existent entries. */
518 return VNET_API_ERROR_INVALID_ARGUMENT;
521 msf = pool_elt_at_index (mm->socket_files, *p);
522 if (msf->ref_cnt > 0)
524 return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
527 vec_free (msf->filename);
528 pool_put (mm->socket_files, msf);
530 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
536 memif_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename)
538 if (sock_id == 0 || sock_id == ~0)
540 return VNET_API_ERROR_INVALID_ARGUMENT;
545 return memif_delete_socket_file (sock_id);
548 if (sock_filename == 0 || sock_filename[0] == 0)
550 return VNET_API_ERROR_INVALID_ARGUMENT;
553 if (sock_filename[0] != '/')
556 error = vlib_unix_recursive_mkdir (vlib_unix_get_runtime_dir ());
559 clib_error_free (error);
560 return VNET_API_ERROR_SYSCALL_ERROR_1;
563 sock_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
568 sock_filename = vec_dup (sock_filename);
571 return memif_add_socket_file (sock_id, sock_filename);
575 memif_delete_if (vlib_main_t * vm, memif_if_t * mif)
577 vnet_main_t *vnm = vnet_get_main ();
578 memif_main_t *mm = &memif_main;
579 memif_socket_file_t *msf =
580 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
583 mif->flags |= MEMIF_IF_FLAG_DELETING;
584 vec_free (mif->local_disc_string);
585 vec_free (mif->remote_disc_string);
587 /* bring down the interface */
588 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
589 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
591 err = clib_error_return (0, "interface deleted");
592 memif_disconnect (mif, err);
593 clib_error_free (err);
595 /* remove the interface */
596 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
597 vnet_delete_hw_interface (vnm, mif->hw_if_index);
599 ethernet_delete_interface (vnm, mif->hw_if_index);
600 mif->hw_if_index = ~0;
602 /* free interface data structures */
603 clib_spinlock_free (&mif->lockp);
604 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
606 /* remove socket file */
607 if (--(msf->ref_cnt) == 0)
609 if (msf->is_listener)
612 vec_foreach_index (i, msf->pending_clients)
614 memif_socket_close (msf->pending_clients + i);
616 memif_socket_close (&msf->sock);
617 vec_free (msf->pending_clients);
619 mhash_free (&msf->dev_instance_by_id);
620 hash_free (msf->dev_instance_by_fd);
623 err = clib_socket_close (msf->sock);
625 clib_error_report (err);
626 clib_mem_free (msf->sock);
630 memset (mif, 0, sizeof (*mif));
631 pool_put (mm->interfaces, mif);
633 if (pool_elts (mm->interfaces) == 0)
634 vlib_process_signal_event (vm, memif_process_node.index,
635 MEMIF_PROCESS_EVENT_STOP, 0);
641 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) =
644 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
649 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
651 memif_main_t *mm = &memif_main;
652 vlib_thread_main_t *tm = vlib_get_thread_main ();
653 vnet_main_t *vnm = vnet_get_main ();
655 vnet_sw_interface_t *sw;
656 clib_error_t *error = 0;
659 vnet_hw_interface_t *hw;
660 memif_socket_file_t *msf = 0;
663 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
666 rv = VNET_API_ERROR_INVALID_ARGUMENT;
670 msf = vec_elt_at_index (mm->socket_files, p[0]);
672 /* existing socket file can be either master or slave but cannot be both */
673 if (msf->ref_cnt > 0)
675 if ((!msf->is_listener != !args->is_master))
677 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
681 p = mhash_get (&msf->dev_instance_by_id, &args->id);
684 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
689 /* Create new socket file */
690 if (msf->ref_cnt == 0)
692 struct stat file_stat;
694 /* If we are creating listener make sure file doesn't exist or if it
695 * exists thn delete it if it is old socket file */
696 if (args->is_master && (stat ((char *) msf->filename, &file_stat) == 0))
698 if (S_ISSOCK (file_stat.st_mode))
700 unlink ((char *) msf->filename);
704 error = clib_error_return (0, "File exists for %s",
706 clib_error_report (error);
707 rv = VNET_API_ERROR_VALUE_EXIST;
712 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
713 sizeof (memif_interface_id_t));
714 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
715 msf->is_listener = (args->is_master != 0);
717 DBG ("initializing socket file %s", msf->filename);
720 pool_get (mm->interfaces, mif);
721 memset (mif, 0, sizeof (*mif));
722 mif->dev_instance = mif - mm->interfaces;
723 mif->socket_file_index = msf - mm->socket_files;
725 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
726 mif->mode = args->mode;
728 mif->secret = vec_dup (args->secret);
730 if (tm->n_vlib_mains > 1)
731 clib_spinlock_init (&mif->lockp);
733 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
736 if (!args->hw_addr_set)
738 f64 now = vlib_time_now (vm);
740 rnd = (u32) (now * 1e6);
741 rnd = random_u32 (&rnd);
743 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
744 args->hw_addr[0] = 2;
745 args->hw_addr[1] = 0xfe;
747 error = ethernet_register_interface (vnm, memif_device_class.index,
748 mif->dev_instance, args->hw_addr,
750 memif_eth_flag_change);
752 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
755 vnet_register_interface (vnm, memif_device_class.index,
757 memif_ip_hw_if_class.index,
761 error = clib_error_return (0, "unsupported interface mode");
765 clib_error_report (error);
766 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
770 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
771 mif->sw_if_index = sw->sw_if_index;
773 mif->cfg.log2_ring_size = args->log2_ring_size;
774 mif->cfg.buffer_size = args->buffer_size;
775 mif->cfg.num_s2m_rings =
776 args->is_master ? args->rx_queues : args->tx_queues;
777 mif->cfg.num_m2s_rings =
778 args->is_master ? args->tx_queues : args->rx_queues;
780 args->sw_if_index = mif->sw_if_index;
782 /* If this is new one, start listening */
783 if (msf->is_listener && msf->ref_cnt == 0)
785 struct stat file_stat;
786 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
788 ASSERT (msf->sock == 0);
791 memset (s, 0, sizeof (clib_socket_t));
792 s->config = (char *) msf->filename;
793 s->flags = CLIB_SOCKET_F_IS_SERVER |
794 CLIB_SOCKET_F_ALLOW_GROUP_WRITE |
795 CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_PASSCRED;
797 if ((error = clib_socket_init (s)))
799 clib_error_report (error);
800 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
804 if (stat ((char *) msf->filename, &file_stat) == -1)
806 ret = VNET_API_ERROR_SYSCALL_ERROR_8;
810 clib_file_t template = { 0 };
811 template.read_function = memif_conn_fd_accept_ready;
812 template.file_descriptor = msf->sock->fd;
813 template.private_data = mif->socket_file_index;
814 template.description = format (0, "memif listener %s", msf->filename);
815 memif_file_add (&msf->sock->private_data, &template);
820 if (args->is_master == 0)
821 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
823 hw = vnet_get_hw_interface (vnm, mif->hw_if_index);
824 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
825 vnet_hw_interface_set_input_node (vnm, mif->hw_if_index,
826 memif_input_node.index);
828 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
830 if (pool_elts (mm->interfaces) == 1)
832 vlib_process_signal_event (vm, memif_process_node.index,
833 MEMIF_PROCESS_EVENT_START, 0);
838 if (mif->hw_if_index != ~0)
840 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
841 vnet_delete_hw_interface (vnm, mif->hw_if_index);
843 ethernet_delete_interface (vnm, mif->hw_if_index);
844 mif->hw_if_index = ~0;
846 memif_delete_if (vm, mif);
854 static clib_error_t *
855 memif_init (vlib_main_t * vm)
857 memif_main_t *mm = &memif_main;
858 vlib_thread_main_t *tm = vlib_get_thread_main ();
861 memset (mm, 0, sizeof (memif_main_t));
863 /* initialize binary API */
864 memif_plugin_api_hookup (vm);
867 * Pre-stuff socket filename pool with a non-modifieable mapping
868 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
869 * default run-time directory.
871 filename = format (0, "%s/%s%c",
872 vlib_unix_get_runtime_dir (),
873 MEMIF_DEFAULT_SOCKET_FILENAME, 0);
874 memif_add_socket_file (0, filename);
876 vec_validate_aligned (mm->rx_buffers, tm->n_vlib_mains - 1,
877 CLIB_CACHE_LINE_BYTES);
882 VLIB_INIT_FUNCTION (memif_init);
885 VLIB_PLUGIN_REGISTER () = {
886 .version = VPP_BUILD_VER,
887 .description = "Packet Memory Interface (experimetal)",
892 * fd.io coding-style-patch-verification: ON
895 * eval: (c-set-style "gnu")