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 <vnet/plugin/plugin.h>
37 #include <vnet/ethernet/ethernet.h>
38 #include <vnet/interface/rx_queue_funcs.h>
39 #include <vnet/interface/tx_queue_funcs.h>
40 #include <vpp/app/version.h>
41 #include <memif/memif.h>
42 #include <memif/private.h>
44 memif_main_t memif_main;
47 memif_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
54 memif_queue_intfd_close (memif_queue_t * mq)
56 if (mq->int_clib_file_index != ~0)
58 memif_file_del_by_index (mq->int_clib_file_index);
59 mq->int_clib_file_index = ~0;
62 else if (mq->int_fd > -1)
70 memif_disconnect_free_zc_queue_buffer (memif_queue_t * mq, u8 is_rx)
72 vlib_main_t *vm = vlib_get_main ();
73 u16 ring_size, n_slots, mask, start;
75 ring_size = 1 << mq->log2_ring_size;
77 n_slots = mq->ring->head - mq->last_tail;
78 start = mq->last_tail & mask;
80 vlib_buffer_free_from_ring (vm, mq->buffers, start, ring_size, n_slots);
82 vlib_buffer_free_from_ring_no_next (vm, mq->buffers, start, ring_size,
84 vec_free (mq->buffers);
88 memif_disconnect (memif_if_t * mif, clib_error_t * err)
90 memif_main_t *mm = &memif_main;
91 vnet_main_t *vnm = vnet_get_main ();
99 memif_log_debug (mif, "disconnect %u (%v)", mif->dev_instance,
100 err ? err->what : 0);
105 mif->local_disc_string = vec_dup (err->what);
106 if (mif->sock && clib_socket_is_connected (mif->sock))
107 e = memif_msg_send_disconnect (mif, err);
111 /* set interface down */
112 mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
113 if (mif->hw_if_index != ~0)
114 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
116 /* close connection socket */
117 if (mif->sock && mif->sock->fd)
119 memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files,
120 mif->socket_file_index);
121 hash_unset (msf->dev_instance_by_fd, mif->sock->fd);
122 memif_socket_close (&mif->sock);
127 err = clib_socket_close (mif->sock);
130 memif_log_err (mif, "%U", format_clib_error, err);
131 clib_error_free (err);
133 clib_mem_free (mif->sock);
137 vec_foreach_index (i, mif->rx_queues)
139 mq = vec_elt_at_index (mif->rx_queues, i);
142 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
144 memif_disconnect_free_zc_queue_buffer(mq, 1);
149 vnet_hw_if_unregister_all_rx_queues (vnm, mif->hw_if_index);
152 vec_foreach_index (i, mif->tx_queues)
154 mq = vec_elt_at_index (mif->tx_queues, i);
157 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
159 memif_disconnect_free_zc_queue_buffer(mq, 0);
161 clib_spinlock_free (&mq->lockp);
165 vnet_hw_if_unregister_all_tx_queues (vnm, mif->hw_if_index);
166 vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
168 /* free tx and rx queues */
169 vec_foreach (mq, mif->rx_queues)
170 memif_queue_intfd_close (mq);
171 vec_free (mif->rx_queues);
173 vec_foreach (mq, mif->tx_queues)
174 memif_queue_intfd_close (mq);
175 vec_free (mif->tx_queues);
177 /* free memory regions */
178 vec_foreach (mr, mif->regions)
183 if ((rv = munmap (mr->shm, mr->region_size)))
184 memif_log_err (mif, "munmap failed, rv = %d", rv);
189 vec_free (mif->regions);
190 vec_free (mif->remote_name);
191 vec_free (mif->remote_if_name);
192 clib_fifo_free (mif->msg_queue);
195 static clib_error_t *
196 memif_int_fd_write_ready (clib_file_t * uf)
198 memif_main_t *mm = &memif_main;
199 u16 qid = uf->private_data & 0xFFFF;
200 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
202 memif_log_warn (mif, "unexpected EPOLLOUT on RX for queue %u", qid);
206 static clib_error_t *
207 memif_int_fd_read_ready (clib_file_t * uf)
209 memif_main_t *mm = &memif_main;
210 vnet_main_t *vnm = vnet_get_main ();
211 u16 qid = uf->private_data & 0xFFFF;
212 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
213 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
217 size = read (uf->file_descriptor, &b, sizeof (b));
220 memif_log_debug (mif, "Failed to read from socket");
224 vnet_hw_if_rx_queue_set_int_pending (vnm, mq->queue_index);
232 memif_connect (memif_if_t * mif)
234 vlib_main_t *vm = vlib_get_main ();
235 vnet_main_t *vnm = vnet_get_main ();
236 clib_file_t template = { 0 };
239 clib_error_t *err = NULL;
241 memif_log_debug (mif, "connect %u", mif->dev_instance);
243 vec_free (mif->local_disc_string);
244 vec_free (mif->remote_disc_string);
247 vec_foreach (mr, mif->regions)
254 err = clib_error_return (0, "no memory region fd");
258 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
259 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
261 err = clib_error_return_unix (0, "mmap");
267 template.read_function = memif_int_fd_read_ready;
268 template.write_function = memif_int_fd_write_ready;
271 u32 n_threads = vlib_get_n_threads ();
272 vec_foreach_index (i, mif->tx_queues)
274 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
276 mq->ring = mif->regions[mq->region].shm + mq->offset;
277 if (mq->ring->cookie != MEMIF_COOKIE)
279 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
283 vnet_hw_if_register_tx_queue (vnm, mif->hw_if_index, i);
284 vnet_hw_if_tx_queue_assign_thread (vnm, mq->queue_index, i % n_threads);
285 clib_spinlock_init (&mq->lockp);
288 vec_foreach_index (i, mif->rx_queues)
290 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
295 mq->ring = mif->regions[mq->region].shm + mq->offset;
296 if (mq->ring->cookie != MEMIF_COOKIE)
298 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
301 qi = vnet_hw_if_register_rx_queue (vnm, mif->hw_if_index, i,
302 VNET_HW_IF_RXQ_THREAD_ANY);
303 mq->queue_index = qi;
306 template.file_descriptor = mq->int_fd;
307 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
308 template.description = format (0, "%U rx %u int",
309 format_memif_device_name,
310 mif->dev_instance, i);
311 memif_file_add (&mq->int_clib_file_index, &template);
312 vnet_hw_if_set_rx_queue_file_index (vnm, qi,
313 mq->int_clib_file_index);
315 ti = vnet_hw_if_get_rx_queue_thread_index (vnm, qi);
316 mq->buffer_pool_index = vlib_buffer_pool_get_default_for_numa (
317 vm, vlib_get_main_by_index (ti)->numa_node);
318 rv = vnet_hw_if_set_rx_queue_mode (vnm, qi, VNET_HW_IF_RX_MODE_DEFAULT);
319 vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
323 (mif, "Warning: unable to set rx mode for interface %d queue %d: "
324 "rc=%d", mif->hw_if_index, i, rv);
327 vnet_hw_if_rx_mode rxmode = vnet_hw_if_get_rx_queue_mode (vnm, qi);
329 if (rxmode == VNET_HW_IF_RX_MODE_POLLING)
330 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
332 vnet_hw_if_rx_queue_set_int_pending (vnm, qi);
337 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
338 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
340 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
341 VNET_HW_INTERFACE_FLAG_LINK_UP);
345 memif_log_err (mif, "%U", format_clib_error, err);
349 static_always_inline memif_ring_t *
350 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
352 if (vec_len (mif->regions) == 0)
354 void *p = mif->regions[0].shm;
356 sizeof (memif_ring_t) +
357 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
358 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
360 return (memif_ring_t *) p;
364 memif_init_regions_and_queues (memif_if_t * mif)
366 vlib_main_t *vm = vlib_get_main ();
367 memif_socket_file_t *msf;
368 memif_ring_t *ring = NULL;
374 ASSERT (vec_len (mif->regions) == 0);
375 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
377 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
378 (sizeof (memif_ring_t) +
379 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
381 r->region_size = buffer_offset;
383 if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
384 r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
385 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
387 if ((fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT, "%U region 0",
388 format_memif_device_name,
389 mif->dev_instance)) == -1)
391 err = clib_mem_get_last_error ();
395 if ((ftruncate (fd, r->region_size)) == -1)
397 err = clib_error_return_unix (0, "ftruncate");
401 msf = pool_elt_at_index (memif_main.socket_files, mif->socket_file_index);
402 r->shm = clib_mem_vm_map_shared (0, r->region_size, fd, 0, "memif%lu/%lu:0",
403 msf->socket_id, mif->id);
405 if (r->shm == CLIB_MEM_VM_MAP_FAILED)
407 err = clib_error_return_unix (0, "memif shared region map failed");
413 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
415 vlib_buffer_pool_t *bp;
417 vec_foreach (bp, vm->buffer_main->buffer_pools)
419 vlib_physmem_map_t *pm;
420 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
421 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
423 r->region_size = pm->n_pages << pm->log2_page_size;
430 for (i = 0; i < mif->run.num_s2m_rings; i++)
432 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
433 ring->head = ring->tail = 0;
434 ring->cookie = MEMIF_COOKIE;
436 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
439 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
441 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
442 ring->desc[j].region = 0;
443 ring->desc[j].offset =
444 buffer_offset + (u32) (slot * mif->run.buffer_size);
445 ring->desc[j].length = mif->run.buffer_size;
448 for (i = 0; i < mif->run.num_m2s_rings; i++)
450 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
451 ring->head = ring->tail = 0;
452 ring->cookie = MEMIF_COOKIE;
454 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
457 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
460 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
461 ring->desc[j].region = 0;
462 ring->desc[j].offset =
463 buffer_offset + (u32) (slot * mif->run.buffer_size);
464 ring->desc[j].length = mif->run.buffer_size;
468 ASSERT (mif->tx_queues == 0);
469 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
470 CLIB_CACHE_LINE_BYTES);
473 vec_foreach_index (i, mif->tx_queues)
475 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
476 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
478 err = clib_error_return_unix (0, "eventfd[tx queue %u]", i);
482 mq->int_clib_file_index = ~0;
483 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
484 mq->log2_ring_size = mif->cfg.log2_ring_size;
486 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
488 mq->type = MEMIF_RING_S2M;
489 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
490 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
491 CLIB_CACHE_LINE_BYTES);
495 ASSERT (mif->rx_queues == 0);
496 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
497 CLIB_CACHE_LINE_BYTES);
500 vec_foreach_index (i, mif->rx_queues)
502 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
503 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
505 err = clib_error_return_unix (0, "eventfd[rx queue %u]", i);
508 mq->int_clib_file_index = ~0;
509 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
510 mq->log2_ring_size = mif->cfg.log2_ring_size;
512 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
514 mq->type = MEMIF_RING_M2S;
515 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
516 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
517 CLIB_CACHE_LINE_BYTES);
524 memif_log_err (mif, "%U", format_clib_error, err);
529 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
531 memif_main_t *mm = &memif_main;
534 uword *event_data = 0, event_type;
536 f64 start_time, last_run_duration = 0, now;
539 sock = clib_mem_alloc (sizeof (clib_socket_t));
540 clib_memset (sock, 0, sizeof (clib_socket_t));
545 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
548 vlib_process_wait_for_event (vm);
550 event_type = vlib_process_get_events (vm, &event_data);
551 vec_reset_length (event_data);
557 case MEMIF_PROCESS_EVENT_START:
560 case MEMIF_PROCESS_EVENT_STOP:
563 case MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN:
569 last_run_duration = start_time = vlib_time_now (vm);
571 pool_foreach (mif, mm->interfaces)
573 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
574 /* Allow no more than 10us without a pause */
575 now = vlib_time_now (vm);
576 if (now > start_time + 10e-6)
578 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
579 start_time = vlib_time_now (vm);
582 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
585 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
588 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
591 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
593 clib_memset (sock, 0, sizeof(clib_socket_t));
594 sock->config = (char *) msf->filename;
595 sock->flags = CLIB_SOCKET_F_IS_CLIENT | CLIB_SOCKET_F_SEQPACKET |
596 CLIB_SOCKET_F_BLOCKING;
598 if ((err = clib_socket_init (sock)))
600 clib_error_free (err);
604 clib_file_t t = { 0 };
606 t.read_function = memif_slave_conn_fd_read_ready;
607 t.write_function = memif_slave_conn_fd_write_ready;
608 t.error_function = memif_slave_conn_fd_error;
609 t.file_descriptor = sock->fd;
610 t.private_data = mif->dev_instance;
611 memif_file_add (&sock->private_data, &t);
612 t.description = format (0, "%U ctl",
613 format_memif_device_name,
615 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
617 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
619 sock = clib_mem_alloc (sizeof(clib_socket_t));
624 last_run_duration = vlib_time_now (vm) - last_run_duration;
630 VLIB_REGISTER_NODE (memif_process_node,static) = {
631 .function = memif_process,
632 .type = VLIB_NODE_TYPE_PROCESS,
633 .name = "memif-process",
638 memif_add_socket_file (u32 sock_id, u8 * socket_filename)
640 memif_main_t *mm = &memif_main;
642 memif_socket_file_t *msf;
644 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
647 msf = pool_elt_at_index (mm->socket_files, *p);
648 if (strcmp ((char *) msf->filename, (char *) socket_filename) == 0)
650 /* Silently accept identical "add". */
654 /* But don't allow a direct add of a different filename. */
655 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
658 pool_get (mm->socket_files, msf);
659 clib_memset (msf, 0, sizeof (memif_socket_file_t));
661 msf->filename = socket_filename;
662 msf->socket_id = sock_id;
664 hash_set (mm->socket_file_index_by_sock_id, sock_id,
665 msf - mm->socket_files);
671 memif_delete_socket_file (u32 sock_id)
673 memif_main_t *mm = &memif_main;
675 memif_socket_file_t *msf;
677 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
680 /* Don't delete non-existent entries. */
681 return VNET_API_ERROR_INVALID_ARGUMENT;
684 msf = pool_elt_at_index (mm->socket_files, *p);
685 if (msf->ref_cnt > 0)
687 return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
690 vec_free (msf->filename);
691 pool_put (mm->socket_files, msf);
693 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
699 memif_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename)
704 /* allow adding socket id 0 */
705 if ((sock_id == 0 && is_add == 0) || sock_id == ~0)
707 return VNET_API_ERROR_INVALID_ARGUMENT;
712 return memif_delete_socket_file (sock_id);
715 if (sock_filename == 0 || sock_filename[0] == 0)
717 return VNET_API_ERROR_INVALID_ARGUMENT;
720 if (sock_filename[0] != '/')
724 /* copy runtime dir path */
725 vec_add (dir, vlib_unix_get_runtime_dir (),
726 strlen (vlib_unix_get_runtime_dir ()));
729 /* if sock_filename contains dirs, add them to path */
730 tmp = strrchr ((char *) sock_filename, '/');
733 idx = tmp - (char *) sock_filename;
734 vec_add (dir, sock_filename, idx);
737 vec_add1 (dir, '\0');
738 /* create socket dir */
739 error = vlib_unix_recursive_mkdir (dir);
742 clib_error_free (error);
743 return VNET_API_ERROR_SYSCALL_ERROR_1;
746 sock_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
751 sock_filename = vec_dup (sock_filename);
753 /* check if directory exists */
754 tmp = strrchr ((char *) sock_filename, '/');
757 idx = tmp - (char *) sock_filename;
758 vec_add (dir, sock_filename, idx);
759 vec_add1 (dir, '\0');
762 /* check dir existance and access rights for effective user/group IDs */
765 (faccessat ( /* ignored */ -1, dir, F_OK | R_OK | W_OK, AT_EACCESS)
769 return VNET_API_ERROR_INVALID_ARGUMENT;
774 return memif_add_socket_file (sock_id, sock_filename);
778 memif_delete_if (vlib_main_t * vm, memif_if_t * mif)
780 vnet_main_t *vnm = vnet_get_main ();
781 memif_main_t *mm = &memif_main;
782 memif_socket_file_t *msf =
783 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
786 mif->flags |= MEMIF_IF_FLAG_DELETING;
787 vec_free (mif->local_disc_string);
788 vec_free (mif->remote_disc_string);
790 /* bring down the interface */
791 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
792 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
794 err = clib_error_return (0, "interface deleted");
795 memif_disconnect (mif, err);
796 clib_error_free (err);
798 if (mif->hw_if_index != ~0)
800 /* remove the interface */
801 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
802 vnet_delete_hw_interface (vnm, mif->hw_if_index);
804 ethernet_delete_interface (vnm, mif->hw_if_index);
805 mif->hw_if_index = ~0;
808 /* free interface data structures */
809 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
811 /* remove socket file */
812 if (--(msf->ref_cnt) == 0)
814 if (msf->is_listener)
818 vec_foreach_index (i, msf->pending_clients)
819 memif_socket_close (msf->pending_clients + i);
821 memif_socket_close (&msf->sock);
822 vec_free (msf->pending_clients);
824 mhash_free (&msf->dev_instance_by_id);
825 hash_free (msf->dev_instance_by_fd);
828 err = clib_socket_close (msf->sock);
831 memif_log_err (mif, "%U", format_clib_error, err);
832 clib_error_free (err);
834 clib_mem_free (msf->sock);
838 clib_memset (mif, 0, sizeof (*mif));
839 pool_put (mm->interfaces, mif);
841 if (pool_elts (mm->interfaces) == 0)
842 vlib_process_signal_event (vm, memif_process_node.index,
843 MEMIF_PROCESS_EVENT_STOP, 0);
849 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) =
852 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
857 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
859 memif_main_t *mm = &memif_main;
860 vlib_thread_main_t *tm = vlib_get_thread_main ();
861 vnet_main_t *vnm = vnet_get_main ();
863 vnet_sw_interface_t *sw;
864 clib_error_t *error = 0;
867 vnet_hw_interface_t *hw;
868 memif_socket_file_t *msf = 0;
871 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
874 rv = VNET_API_ERROR_INVALID_ARGUMENT;
878 msf = vec_elt_at_index (mm->socket_files, p[0]);
880 /* existing socket file can be either master or slave but cannot be both */
881 if (msf->ref_cnt > 0)
883 if ((!msf->is_listener != !args->is_master))
885 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
889 p = mhash_get (&msf->dev_instance_by_id, &args->id);
892 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
897 /* Create new socket file */
898 if (msf->ref_cnt == 0)
900 struct stat file_stat;
902 /* If we are creating listener make sure file doesn't exist or if it
903 * exists thn delete it if it is old socket file */
904 if (args->is_master && (stat ((char *) msf->filename, &file_stat) == 0))
906 if (S_ISSOCK (file_stat.st_mode))
908 unlink ((char *) msf->filename);
912 error = clib_error_return (0, "File exists for %s",
914 rv = VNET_API_ERROR_VALUE_EXIST;
919 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
920 sizeof (memif_interface_id_t));
921 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
922 msf->is_listener = (args->is_master != 0);
924 memif_log_debug (0, "initializing socket file %s", msf->filename);
927 if (mm->per_thread_data == 0)
931 vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
932 CLIB_CACHE_LINE_BYTES);
934 for (i = 0; i < tm->n_vlib_mains; i++)
936 memif_per_thread_data_t *ptd =
937 vec_elt_at_index (mm->per_thread_data, i);
938 vlib_buffer_t *bt = &ptd->buffer_template;
939 clib_memset (bt, 0, sizeof (vlib_buffer_t));
940 bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
941 bt->total_length_not_including_first_buffer = 0;
942 vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
944 /* initially prealloc copy_ops so we can use
945 _vec_len instead of vec_elen */
946 vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
947 vec_reset_length (ptd->copy_ops);
948 vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
949 vec_reset_length (ptd->buffers);
953 pool_get (mm->interfaces, mif);
954 clib_memset (mif, 0, sizeof (*mif));
955 mif->dev_instance = mif - mm->interfaces;
956 mif->socket_file_index = msf - mm->socket_files;
958 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
959 mif->mode = args->mode;
961 mif->secret = vec_dup (args->secret);
963 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
966 if (!args->hw_addr_set)
968 f64 now = vlib_time_now (vm);
970 rnd = (u32) (now * 1e6);
971 rnd = random_u32 (&rnd);
973 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
974 args->hw_addr[0] = 2;
975 args->hw_addr[1] = 0xfe;
977 error = ethernet_register_interface (vnm, memif_device_class.index,
978 mif->dev_instance, args->hw_addr,
980 memif_eth_flag_change);
982 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
985 vnet_register_interface (vnm, memif_device_class.index,
987 memif_ip_hw_if_class.index,
991 error = clib_error_return (0, "unsupported interface mode");
995 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
999 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
1000 mif->sw_if_index = sw->sw_if_index;
1002 mif->cfg.log2_ring_size = args->log2_ring_size;
1003 mif->cfg.buffer_size = args->buffer_size;
1004 mif->cfg.num_s2m_rings =
1005 args->is_master ? args->rx_queues : args->tx_queues;
1006 mif->cfg.num_m2s_rings =
1007 args->is_master ? args->tx_queues : args->rx_queues;
1009 args->sw_if_index = mif->sw_if_index;
1011 /* If this is new one, start listening */
1012 if (msf->is_listener && msf->ref_cnt == 0)
1014 struct stat file_stat;
1015 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
1017 ASSERT (msf->sock == 0);
1020 clib_memset (s, 0, sizeof (clib_socket_t));
1021 s->config = (char *) msf->filename;
1022 s->flags = CLIB_SOCKET_F_IS_SERVER |
1023 CLIB_SOCKET_F_ALLOW_GROUP_WRITE |
1024 CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_PASSCRED;
1026 if ((error = clib_socket_init (s)))
1028 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
1032 if (stat ((char *) msf->filename, &file_stat) == -1)
1034 ret = VNET_API_ERROR_SYSCALL_ERROR_8;
1038 clib_file_t template = { 0 };
1039 template.read_function = memif_conn_fd_accept_ready;
1040 template.file_descriptor = msf->sock->fd;
1041 template.private_data = mif->socket_file_index;
1042 template.description = format (0, "memif listener %s", msf->filename);
1043 memif_file_add (&msf->sock->private_data, &template);
1048 if (args->is_master == 0)
1050 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
1051 if (args->is_zero_copy)
1052 mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
1055 hw = vnet_get_hw_interface (vnm, mif->hw_if_index);
1056 hw->caps |= VNET_HW_INTERFACE_CAP_SUPPORTS_INT_MODE;
1057 vnet_hw_if_set_input_node (vnm, mif->hw_if_index, memif_input_node.index);
1058 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
1060 if (pool_elts (mm->interfaces) == 1)
1062 vlib_process_signal_event (vm, memif_process_node.index,
1063 MEMIF_PROCESS_EVENT_START, 0);
1068 memif_delete_if (vm, mif);
1071 memif_log_err (mif, "%U", format_clib_error, error);
1072 clib_error_free (error);
1081 memif_interface_admin_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
1083 memif_main_t *mm = &memif_main;
1084 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1085 memif_if_t *mif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
1086 static clib_error_t *error = 0;
1088 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1089 mif->flags |= MEMIF_IF_FLAG_ADMIN_UP;
1091 mif->flags &= ~MEMIF_IF_FLAG_ADMIN_UP;
1093 vlib_process_signal_event (vnm->vlib_main, memif_process_node.index,
1094 MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN, 0);
1098 static clib_error_t *
1099 memif_init (vlib_main_t * vm)
1101 memif_main_t *mm = &memif_main;
1103 clib_memset (mm, 0, sizeof (memif_main_t));
1105 mm->log_class = vlib_log_register_class ("memif_plugin", 0);
1106 memif_log_debug (0, "initialized");
1108 /* initialize binary API */
1109 memif_plugin_api_hookup (vm);
1112 * Pre-stuff socket filename pool with a non-modifieable mapping
1113 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
1114 * default run-time directory.
1116 memif_socket_filename_add_del (1, 0, (u8 *) MEMIF_DEFAULT_SOCKET_FILENAME);
1121 VLIB_INIT_FUNCTION (memif_init);
1124 VLIB_PLUGIN_REGISTER () = {
1125 .version = VPP_BUILD_VER,
1126 .description = "Packet Memory Interface (memif) -- Experimental",
1131 * fd.io coding-style-patch-verification: ON
1134 * eval: (c-set-style "gnu")