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 memif_log_debug (mif, "disconnect %u (%v)", mif->dev_instance,
86 mif->local_disc_string = vec_dup (err->what);
87 if (mif->sock && clib_socket_is_connected (mif->sock))
88 e = memif_msg_send_disconnect (mif, err);
92 /* set interface down */
93 mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
94 if (mif->hw_if_index != ~0)
95 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
97 /* close connection socket */
98 if (mif->sock && mif->sock->fd)
100 memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files,
101 mif->socket_file_index);
102 hash_unset (msf->dev_instance_by_fd, mif->sock->fd);
103 memif_socket_close (&mif->sock);
108 err = clib_socket_close (mif->sock);
111 memif_log_err (mif, "%U", format_clib_error, err);
112 clib_error_free (err);
114 clib_mem_free (mif->sock);
118 vec_foreach_index (i, mif->rx_queues)
120 mq = vec_elt_at_index (mif->rx_queues, i);
124 rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i);
127 "Unable to unassign interface %d, queue %d: rc=%d",
128 mif->hw_if_index, i, rv);
133 /* free tx and rx queues */
134 vec_foreach (mq, mif->rx_queues)
135 memif_queue_intfd_close (mq);
136 vec_free (mif->rx_queues);
138 vec_foreach (mq, mif->tx_queues)
139 memif_queue_intfd_close (mq);
140 vec_free (mif->tx_queues);
142 /* free memory regions */
143 vec_foreach (mr, mif->regions)
148 if ((rv = munmap (mr->shm, mr->region_size)))
149 memif_log_err (mif, "munmap failed, rv = %d", rv);
154 vec_free (mif->regions);
155 vec_free (mif->remote_name);
156 vec_free (mif->remote_if_name);
157 clib_fifo_free (mif->msg_queue);
160 static clib_error_t *
161 memif_int_fd_read_ready (clib_file_t * uf)
163 memif_main_t *mm = &memif_main;
164 vnet_main_t *vnm = vnet_get_main ();
165 u16 qid = uf->private_data & 0xFFFF;
166 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
167 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
171 size = read (uf->file_descriptor, &b, sizeof (b));
174 memif_log_debug (mif, "Failed to read form socket");
178 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, qid);
186 memif_connect (memif_if_t * mif)
188 vnet_main_t *vnm = vnet_get_main ();
189 clib_file_t template = { 0 };
192 clib_error_t *err = NULL;
194 memif_log_debug (mif, "connect %u", mif->dev_instance);
196 vec_free (mif->local_disc_string);
197 vec_free (mif->remote_disc_string);
200 vec_foreach (mr, mif->regions)
207 err = clib_error_return (0, "no memory region fd");
211 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
212 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
214 err = clib_error_return_unix (0, "mmap");
220 template.read_function = memif_int_fd_read_ready;
223 vec_foreach_index (i, mif->tx_queues)
225 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
227 mq->ring = mif->regions[mq->region].shm + mq->offset;
228 if (mq->ring->cookie != MEMIF_COOKIE)
230 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
235 vec_foreach_index (i, mif->rx_queues)
237 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
240 mq->ring = mif->regions[mq->region].shm + mq->offset;
241 if (mq->ring->cookie != MEMIF_COOKIE)
243 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
249 template.file_descriptor = mq->int_fd;
250 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
251 template.description = format (0, "%U rx %u int",
252 format_memif_device_name,
253 mif->dev_instance, i);
254 memif_file_add (&mq->int_clib_file_index, &template);
256 vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0);
257 rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i,
258 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
261 (mif, "Warning: unable to set rx mode for interface %d queue %d: "
262 "rc=%d", mif->hw_if_index, i, rv);
265 vnet_hw_interface_rx_mode rxmode;
266 vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode);
268 if (rxmode == VNET_HW_INTERFACE_RX_MODE_POLLING)
269 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
271 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, i);
276 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
277 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
279 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
280 VNET_HW_INTERFACE_FLAG_LINK_UP);
284 memif_log_err (mif, "%U", format_clib_error, err);
288 static_always_inline memif_ring_t *
289 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
291 if (vec_len (mif->regions) == 0)
293 void *p = mif->regions[0].shm;
295 sizeof (memif_ring_t) +
296 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
297 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
299 return (memif_ring_t *) p;
303 memif_init_regions_and_queues (memif_if_t * mif)
305 vlib_main_t *vm = vlib_get_main ();
306 memif_ring_t *ring = NULL;
310 clib_mem_vm_alloc_t alloc = { 0 };
313 ASSERT (vec_len (mif->regions) == 0);
314 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
316 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
317 (sizeof (memif_ring_t) +
318 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
320 r->region_size = buffer_offset;
322 if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
323 r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
324 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
326 alloc.name = "memif region";
327 alloc.size = r->region_size;
328 alloc.flags = CLIB_MEM_VM_F_SHARED;
330 err = clib_mem_vm_ext_alloc (&alloc);
337 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
339 vlib_buffer_pool_t *bp;
341 vec_foreach (bp, buffer_main.buffer_pools)
343 vlib_physmem_map_t *pm;
344 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
345 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
347 r->region_size = pm->n_pages << pm->log2_page_size;
354 for (i = 0; i < mif->run.num_s2m_rings; i++)
356 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
357 ring->head = ring->tail = 0;
358 ring->cookie = MEMIF_COOKIE;
360 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
363 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
365 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
366 ring->desc[j].region = 0;
367 ring->desc[j].offset =
368 buffer_offset + (u32) (slot * mif->run.buffer_size);
369 ring->desc[j].length = mif->run.buffer_size;
372 for (i = 0; i < mif->run.num_m2s_rings; i++)
374 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
375 ring->head = ring->tail = 0;
376 ring->cookie = MEMIF_COOKIE;
378 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
381 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
384 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
385 ring->desc[j].region = 0;
386 ring->desc[j].offset =
387 buffer_offset + (u32) (slot * mif->run.buffer_size);
388 ring->desc[j].length = mif->run.buffer_size;
392 ASSERT (mif->tx_queues == 0);
393 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
394 CLIB_CACHE_LINE_BYTES);
397 vec_foreach_index (i, mif->tx_queues)
399 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
400 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
402 err = clib_error_return_unix (0, "eventfd[tx queue %u]", i);
405 mq->int_clib_file_index = ~0;
406 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
407 mq->log2_ring_size = mif->cfg.log2_ring_size;
409 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
411 mq->type = MEMIF_RING_S2M;
412 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
413 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
414 CLIB_CACHE_LINE_BYTES);
418 ASSERT (mif->rx_queues == 0);
419 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
420 CLIB_CACHE_LINE_BYTES);
423 vec_foreach_index (i, mif->rx_queues)
425 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
426 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
428 err = clib_error_return_unix (0, "eventfd[rx queue %u]", i);
431 mq->int_clib_file_index = ~0;
432 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
433 mq->log2_ring_size = mif->cfg.log2_ring_size;
435 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
437 mq->type = MEMIF_RING_M2S;
438 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
439 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
440 CLIB_CACHE_LINE_BYTES);
447 memif_log_err (mif, "%U", format_clib_error, err);
452 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
454 memif_main_t *mm = &memif_main;
457 uword *event_data = 0, event_type;
459 f64 start_time, last_run_duration = 0, now;
462 sock = clib_mem_alloc (sizeof (clib_socket_t));
463 clib_memset (sock, 0, sizeof (clib_socket_t));
468 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
471 vlib_process_wait_for_event (vm);
473 event_type = vlib_process_get_events (vm, &event_data);
474 vec_reset_length (event_data);
480 case MEMIF_PROCESS_EVENT_START:
483 case MEMIF_PROCESS_EVENT_STOP:
490 last_run_duration = start_time = vlib_time_now (vm);
492 pool_foreach (mif, mm->interfaces,
494 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
495 /* Allow no more than 10us without a pause */
496 now = vlib_time_now (vm);
497 if (now > start_time + 10e-6)
499 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
500 start_time = vlib_time_now (vm);
503 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
506 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
509 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
512 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
514 clib_memset (sock, 0, sizeof(clib_socket_t));
515 sock->config = (char *) msf->filename;
516 sock->flags = CLIB_SOCKET_F_IS_CLIENT| CLIB_SOCKET_F_SEQPACKET;
518 if ((err = clib_socket_init (sock)))
520 clib_error_free (err);
524 clib_file_t t = { 0 };
526 t.read_function = memif_slave_conn_fd_read_ready;
527 t.write_function = memif_slave_conn_fd_write_ready;
528 t.error_function = memif_slave_conn_fd_error;
529 t.file_descriptor = sock->fd;
530 t.private_data = mif->dev_instance;
531 memif_file_add (&sock->private_data, &t);
532 t.description = format (0, "%U ctl",
533 format_memif_device_name,
535 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
537 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
539 sock = clib_mem_alloc (sizeof(clib_socket_t));
544 last_run_duration = vlib_time_now (vm) - last_run_duration;
550 VLIB_REGISTER_NODE (memif_process_node,static) = {
551 .function = memif_process,
552 .type = VLIB_NODE_TYPE_PROCESS,
553 .name = "memif-process",
558 memif_add_socket_file (u32 sock_id, u8 * socket_filename)
560 memif_main_t *mm = &memif_main;
562 memif_socket_file_t *msf;
564 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
567 msf = pool_elt_at_index (mm->socket_files, *p);
568 if (strcmp ((char *) msf->filename, (char *) socket_filename) == 0)
570 /* Silently accept identical "add". */
574 /* But don't allow a direct add of a different filename. */
575 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
578 pool_get (mm->socket_files, msf);
579 clib_memset (msf, 0, sizeof (memif_socket_file_t));
581 msf->filename = socket_filename;
582 msf->socket_id = sock_id;
584 hash_set (mm->socket_file_index_by_sock_id, sock_id,
585 msf - mm->socket_files);
591 memif_delete_socket_file (u32 sock_id)
593 memif_main_t *mm = &memif_main;
595 memif_socket_file_t *msf;
597 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
600 /* Don't delete non-existent entries. */
601 return VNET_API_ERROR_INVALID_ARGUMENT;
604 msf = pool_elt_at_index (mm->socket_files, *p);
605 if (msf->ref_cnt > 0)
607 return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
610 vec_free (msf->filename);
611 pool_put (mm->socket_files, msf);
613 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
619 memif_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename)
624 /* allow adding socket id 0 */
625 if ((sock_id == 0 && is_add == 0) || sock_id == ~0)
627 return VNET_API_ERROR_INVALID_ARGUMENT;
632 return memif_delete_socket_file (sock_id);
635 if (sock_filename == 0 || sock_filename[0] == 0)
637 return VNET_API_ERROR_INVALID_ARGUMENT;
640 if (sock_filename[0] != '/')
644 /* copy runtime dir path */
645 vec_add (dir, vlib_unix_get_runtime_dir (),
646 strlen (vlib_unix_get_runtime_dir ()));
649 /* if sock_filename contains dirs, add them to path */
650 tmp = strrchr ((char *) sock_filename, '/');
653 idx = tmp - (char *) sock_filename;
654 vec_add (dir, sock_filename, idx);
657 vec_add1 (dir, '\0');
658 /* create socket dir */
659 error = vlib_unix_recursive_mkdir (dir);
662 clib_error_free (error);
663 return VNET_API_ERROR_SYSCALL_ERROR_1;
666 sock_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
671 sock_filename = vec_dup (sock_filename);
673 /* check if directory exists */
674 tmp = strrchr ((char *) sock_filename, '/');
677 idx = tmp - (char *) sock_filename;
678 vec_add (dir, sock_filename, idx);
679 vec_add1 (dir, '\0');
682 /* check dir existance and access rights for effective user/group IDs */
685 (faccessat ( /* ignored */ -1, dir, F_OK | R_OK | W_OK, AT_EACCESS)
689 return VNET_API_ERROR_INVALID_ARGUMENT;
694 return memif_add_socket_file (sock_id, sock_filename);
698 memif_delete_if (vlib_main_t * vm, memif_if_t * mif)
700 vnet_main_t *vnm = vnet_get_main ();
701 memif_main_t *mm = &memif_main;
702 memif_socket_file_t *msf =
703 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
706 mif->flags |= MEMIF_IF_FLAG_DELETING;
707 vec_free (mif->local_disc_string);
708 vec_free (mif->remote_disc_string);
710 /* bring down the interface */
711 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
712 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
714 err = clib_error_return (0, "interface deleted");
715 memif_disconnect (mif, err);
716 clib_error_free (err);
718 if (mif->hw_if_index != ~0)
720 /* remove the interface */
721 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
722 vnet_delete_hw_interface (vnm, mif->hw_if_index);
724 ethernet_delete_interface (vnm, mif->hw_if_index);
725 mif->hw_if_index = ~0;
728 /* free interface data structures */
729 clib_spinlock_free (&mif->lockp);
730 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
732 /* remove socket file */
733 if (--(msf->ref_cnt) == 0)
735 if (msf->is_listener)
739 vec_foreach_index (i, msf->pending_clients)
740 memif_socket_close (msf->pending_clients + i);
742 memif_socket_close (&msf->sock);
743 vec_free (msf->pending_clients);
745 mhash_free (&msf->dev_instance_by_id);
746 hash_free (msf->dev_instance_by_fd);
749 err = clib_socket_close (msf->sock);
752 memif_log_err (mif, "%U", format_clib_error, err);
753 clib_error_free (err);
755 clib_mem_free (msf->sock);
759 clib_memset (mif, 0, sizeof (*mif));
760 pool_put (mm->interfaces, mif);
762 if (pool_elts (mm->interfaces) == 0)
763 vlib_process_signal_event (vm, memif_process_node.index,
764 MEMIF_PROCESS_EVENT_STOP, 0);
770 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) =
773 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
778 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
780 memif_main_t *mm = &memif_main;
781 vlib_thread_main_t *tm = vlib_get_thread_main ();
782 vnet_main_t *vnm = vnet_get_main ();
784 vnet_sw_interface_t *sw;
785 clib_error_t *error = 0;
788 vnet_hw_interface_t *hw;
789 memif_socket_file_t *msf = 0;
792 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
795 rv = VNET_API_ERROR_INVALID_ARGUMENT;
799 msf = vec_elt_at_index (mm->socket_files, p[0]);
801 /* existing socket file can be either master or slave but cannot be both */
802 if (msf->ref_cnt > 0)
804 if ((!msf->is_listener != !args->is_master))
806 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
810 p = mhash_get (&msf->dev_instance_by_id, &args->id);
813 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
818 /* Create new socket file */
819 if (msf->ref_cnt == 0)
821 struct stat file_stat;
823 /* If we are creating listener make sure file doesn't exist or if it
824 * exists thn delete it if it is old socket file */
825 if (args->is_master && (stat ((char *) msf->filename, &file_stat) == 0))
827 if (S_ISSOCK (file_stat.st_mode))
829 unlink ((char *) msf->filename);
833 error = clib_error_return (0, "File exists for %s",
835 rv = VNET_API_ERROR_VALUE_EXIST;
840 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
841 sizeof (memif_interface_id_t));
842 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
843 msf->is_listener = (args->is_master != 0);
845 memif_log_debug (0, "initializing socket file %s", msf->filename);
848 if (mm->per_thread_data == 0)
851 vlib_buffer_free_list_t *fl;
853 vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
854 CLIB_CACHE_LINE_BYTES);
857 vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
858 for (i = 0; i < tm->n_vlib_mains; i++)
860 memif_per_thread_data_t *ptd =
861 vec_elt_at_index (mm->per_thread_data, i);
862 vlib_buffer_t *bt = &ptd->buffer_template;
863 vlib_buffer_init_for_free_list (bt, fl);
864 bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
865 bt->total_length_not_including_first_buffer = 0;
866 vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
868 /* initially prealloc copy_ops so we can use
869 _vec_len instead of vec_elen */
870 vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
871 vec_reset_length (ptd->copy_ops);
872 vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
873 vec_reset_length (ptd->buffers);
877 pool_get (mm->interfaces, mif);
878 clib_memset (mif, 0, sizeof (*mif));
879 mif->dev_instance = mif - mm->interfaces;
880 mif->socket_file_index = msf - mm->socket_files;
882 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
883 mif->mode = args->mode;
885 mif->secret = vec_dup (args->secret);
887 if (tm->n_vlib_mains > 1)
888 clib_spinlock_init (&mif->lockp);
890 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
893 if (!args->hw_addr_set)
895 f64 now = vlib_time_now (vm);
897 rnd = (u32) (now * 1e6);
898 rnd = random_u32 (&rnd);
900 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
901 args->hw_addr[0] = 2;
902 args->hw_addr[1] = 0xfe;
904 error = ethernet_register_interface (vnm, memif_device_class.index,
905 mif->dev_instance, args->hw_addr,
907 memif_eth_flag_change);
909 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
912 vnet_register_interface (vnm, memif_device_class.index,
914 memif_ip_hw_if_class.index,
918 error = clib_error_return (0, "unsupported interface mode");
922 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
926 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
927 mif->sw_if_index = sw->sw_if_index;
929 mif->cfg.log2_ring_size = args->log2_ring_size;
930 mif->cfg.buffer_size = args->buffer_size;
931 mif->cfg.num_s2m_rings =
932 args->is_master ? args->rx_queues : args->tx_queues;
933 mif->cfg.num_m2s_rings =
934 args->is_master ? args->tx_queues : args->rx_queues;
936 args->sw_if_index = mif->sw_if_index;
938 /* If this is new one, start listening */
939 if (msf->is_listener && msf->ref_cnt == 0)
941 struct stat file_stat;
942 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
944 ASSERT (msf->sock == 0);
947 clib_memset (s, 0, sizeof (clib_socket_t));
948 s->config = (char *) msf->filename;
949 s->flags = CLIB_SOCKET_F_IS_SERVER |
950 CLIB_SOCKET_F_ALLOW_GROUP_WRITE |
951 CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_PASSCRED;
953 if ((error = clib_socket_init (s)))
955 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
959 if (stat ((char *) msf->filename, &file_stat) == -1)
961 ret = VNET_API_ERROR_SYSCALL_ERROR_8;
965 clib_file_t template = { 0 };
966 template.read_function = memif_conn_fd_accept_ready;
967 template.file_descriptor = msf->sock->fd;
968 template.private_data = mif->socket_file_index;
969 template.description = format (0, "memif listener %s", msf->filename);
970 memif_file_add (&msf->sock->private_data, &template);
975 if (args->is_master == 0)
977 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
978 if (args->is_zero_copy)
979 mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
982 hw = vnet_get_hw_interface (vnm, mif->hw_if_index);
983 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
984 vnet_hw_interface_set_input_node (vnm, mif->hw_if_index,
985 memif_input_node.index);
987 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
989 if (pool_elts (mm->interfaces) == 1)
991 vlib_process_signal_event (vm, memif_process_node.index,
992 MEMIF_PROCESS_EVENT_START, 0);
997 if (mif->hw_if_index != ~0)
999 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1000 vnet_delete_hw_interface (vnm, mif->hw_if_index);
1002 ethernet_delete_interface (vnm, mif->hw_if_index);
1003 mif->hw_if_index = ~0;
1005 memif_delete_if (vm, mif);
1008 memif_log_err (mif, "%U", format_clib_error, error);
1009 clib_error_free (error);
1017 static clib_error_t *
1018 memif_init (vlib_main_t * vm)
1020 memif_main_t *mm = &memif_main;
1022 clib_memset (mm, 0, sizeof (memif_main_t));
1024 mm->log_class = vlib_log_register_class ("memif_plugin", 0);
1025 memif_log_debug (0, "initialized");
1027 /* initialize binary API */
1028 memif_plugin_api_hookup (vm);
1031 * Pre-stuff socket filename pool with a non-modifieable mapping
1032 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
1033 * default run-time directory.
1035 memif_socket_filename_add_del (1, 0, (u8 *) MEMIF_DEFAULT_SOCKET_FILENAME);
1040 VLIB_INIT_FUNCTION (memif_init);
1043 VLIB_PLUGIN_REGISTER () = {
1044 .version = VPP_BUILD_VER,
1045 .description = "Packet Memory Interface (experimental)",
1050 * fd.io coding-style-patch-verification: ON
1053 * eval: (c-set-style "gnu")