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);
114 vec_foreach_index (i, mif->rx_queues)
116 mq = vec_elt_at_index (mif->rx_queues, i);
120 rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i);
122 DBG ("Warning: unable to unassign interface %d, "
123 "queue %d: rc=%d", mif->hw_if_index, i, rv);
128 /* free tx and rx queues */
129 vec_foreach (mq, mif->rx_queues)
130 memif_queue_intfd_close (mq);
131 vec_free (mif->rx_queues);
133 vec_foreach (mq, mif->tx_queues)
134 memif_queue_intfd_close (mq);
135 vec_free (mif->tx_queues);
137 /* free memory regions */
138 vec_foreach (mr, mif->regions)
143 if ((rv = munmap (mr->shm, mr->region_size)))
144 clib_warning ("munmap failed, rv = %d", rv);
149 vec_free (mif->regions);
150 vec_free (mif->remote_name);
151 vec_free (mif->remote_if_name);
152 clib_fifo_free (mif->msg_queue);
155 static clib_error_t *
156 memif_int_fd_read_ready (clib_file_t * uf)
158 memif_main_t *mm = &memif_main;
159 vnet_main_t *vnm = vnet_get_main ();
160 u16 qid = uf->private_data & 0xFFFF;
161 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
162 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
166 size = read (uf->file_descriptor, &b, sizeof (b));
169 DBG_UNIX_LOG ("Failed to read from socket");
173 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, qid);
181 memif_connect (memif_if_t * mif)
183 vnet_main_t *vnm = vnet_get_main ();
184 clib_file_t template = { 0 };
188 DBG ("connect %u", mif->dev_instance);
190 vec_free (mif->local_disc_string);
191 vec_free (mif->remote_disc_string);
194 vec_foreach (mr, mif->regions)
200 clib_error_return (0, "no memory region fd");
202 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
203 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
204 return clib_error_return_unix (0, "mmap");
208 template.read_function = memif_int_fd_read_ready;
211 vec_foreach_index (i, mif->tx_queues)
213 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
215 mq->ring = mif->regions[mq->region].shm + mq->offset;
216 if (mq->ring->cookie != MEMIF_COOKIE)
217 return clib_error_return (0, "wrong cookie on tx ring %u", i);
220 vec_foreach_index (i, mif->rx_queues)
222 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
225 mq->ring = mif->regions[mq->region].shm + mq->offset;
226 if (mq->ring->cookie != MEMIF_COOKIE)
227 return clib_error_return (0, "wrong cookie on tx ring %u", i);
231 template.file_descriptor = mq->int_fd;
232 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
233 template.description = format (0, "%U rx %u int",
234 format_memif_device_name,
235 mif->dev_instance, i);
236 memif_file_add (&mq->int_clib_file_index, &template);
238 vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0);
239 rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i,
240 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
243 ("Warning: unable to set rx mode for interface %d queue %d: "
244 "rc=%d", mif->hw_if_index, i, rv);
247 vnet_hw_interface_rx_mode rxmode;
248 vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode);
250 if (rxmode == VNET_HW_INTERFACE_RX_MODE_POLLING)
251 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
253 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, i);
258 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
259 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
261 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
262 VNET_HW_INTERFACE_FLAG_LINK_UP);
266 static_always_inline memif_ring_t *
267 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
269 if (vec_len (mif->regions) == 0)
271 void *p = mif->regions[0].shm;
273 sizeof (memif_ring_t) +
274 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
275 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
277 return (memif_ring_t *) p;
281 memif_init_regions_and_queues (memif_if_t * mif)
283 vlib_main_t *vm = vlib_get_main ();
284 memif_ring_t *ring = NULL;
288 clib_mem_vm_alloc_t alloc = { 0 };
291 ASSERT (vec_len (mif->regions) == 0);
292 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
294 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
295 (sizeof (memif_ring_t) +
296 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
298 r->region_size = buffer_offset;
300 if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
301 r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
302 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
304 alloc.name = "memif region";
305 alloc.size = r->region_size;
306 alloc.flags = CLIB_MEM_VM_F_SHARED;
308 err = clib_mem_vm_ext_alloc (&alloc);
315 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
317 vlib_buffer_pool_t *bp;
319 vec_foreach (bp, buffer_main.buffer_pools)
321 vlib_physmem_region_t *pr;
322 pr = vlib_physmem_get_region (vm, bp->physmem_region);
323 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
325 r->region_size = pr->size;
332 for (i = 0; i < mif->run.num_s2m_rings; i++)
334 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
335 ring->head = ring->tail = 0;
336 ring->cookie = MEMIF_COOKIE;
338 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
341 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
343 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
344 ring->desc[j].region = 0;
345 ring->desc[j].offset =
346 buffer_offset + (u32) (slot * mif->run.buffer_size);
347 ring->desc[j].length = mif->run.buffer_size;
350 for (i = 0; i < mif->run.num_m2s_rings; i++)
352 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
353 ring->head = ring->tail = 0;
354 ring->cookie = MEMIF_COOKIE;
356 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
359 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
362 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
363 ring->desc[j].region = 0;
364 ring->desc[j].offset =
365 buffer_offset + (u32) (slot * mif->run.buffer_size);
366 ring->desc[j].length = mif->run.buffer_size;
370 ASSERT (mif->tx_queues == 0);
371 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
372 CLIB_CACHE_LINE_BYTES);
375 vec_foreach_index (i, mif->tx_queues)
377 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
378 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
379 return clib_error_return_unix (0, "eventfd[tx queue %u]", i);
380 mq->int_clib_file_index = ~0;
381 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
382 mq->log2_ring_size = mif->cfg.log2_ring_size;
384 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
386 mq->type = MEMIF_RING_S2M;
387 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
388 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
389 CLIB_CACHE_LINE_BYTES);
393 ASSERT (mif->rx_queues == 0);
394 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
395 CLIB_CACHE_LINE_BYTES);
398 vec_foreach_index (i, mif->rx_queues)
400 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
401 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
402 return clib_error_return_unix (0, "eventfd[rx queue %u]", i);
403 mq->int_clib_file_index = ~0;
404 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
405 mq->log2_ring_size = mif->cfg.log2_ring_size;
407 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
409 mq->type = MEMIF_RING_M2S;
410 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
411 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
412 CLIB_CACHE_LINE_BYTES);
420 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
422 memif_main_t *mm = &memif_main;
425 uword *event_data = 0, event_type;
427 f64 start_time, last_run_duration = 0, now;
430 sock = clib_mem_alloc (sizeof (clib_socket_t));
431 memset (sock, 0, sizeof (clib_socket_t));
436 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
439 vlib_process_wait_for_event (vm);
441 event_type = vlib_process_get_events (vm, &event_data);
442 vec_reset_length (event_data);
448 case MEMIF_PROCESS_EVENT_START:
451 case MEMIF_PROCESS_EVENT_STOP:
458 last_run_duration = start_time = vlib_time_now (vm);
460 pool_foreach (mif, mm->interfaces,
462 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
463 /* Allow no more than 10us without a pause */
464 now = vlib_time_now (vm);
465 if (now > start_time + 10e-6)
467 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
468 start_time = vlib_time_now (vm);
471 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
474 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
477 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
480 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
482 memset (sock, 0, sizeof(clib_socket_t));
483 sock->config = (char *) msf->filename;
484 sock->flags = CLIB_SOCKET_F_IS_CLIENT| CLIB_SOCKET_F_SEQPACKET;
486 if ((err = clib_socket_init (sock)))
488 clib_error_free (err);
492 clib_file_t t = { 0 };
494 t.read_function = memif_slave_conn_fd_read_ready;
495 t.write_function = memif_slave_conn_fd_write_ready;
496 t.error_function = memif_slave_conn_fd_error;
497 t.file_descriptor = sock->fd;
498 t.private_data = mif->dev_instance;
499 memif_file_add (&sock->private_data, &t);
500 t.description = format (0, "%U ctl",
501 format_memif_device_name,
503 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
505 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
507 sock = clib_mem_alloc (sizeof(clib_socket_t));
512 last_run_duration = vlib_time_now (vm) - last_run_duration;
518 VLIB_REGISTER_NODE (memif_process_node,static) = {
519 .function = memif_process,
520 .type = VLIB_NODE_TYPE_PROCESS,
521 .name = "memif-process",
527 memif_add_socket_file (u32 sock_id, u8 * socket_filename)
529 memif_main_t *mm = &memif_main;
531 memif_socket_file_t *msf;
533 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
536 msf = pool_elt_at_index (mm->socket_files, *p);
537 if (strcmp ((char *) msf->filename, (char *) socket_filename) == 0)
539 /* Silently accept identical "add". */
543 /* But don't allow a direct add of a different filename. */
544 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
547 DBG ("creating socket file (uninitialized) %s", msf->filename);
549 pool_get (mm->socket_files, msf);
550 memset (msf, 0, sizeof (memif_socket_file_t));
552 msf->filename = socket_filename;
553 msf->socket_id = sock_id;
555 hash_set (mm->socket_file_index_by_sock_id, sock_id,
556 msf - mm->socket_files);
562 memif_delete_socket_file (u32 sock_id)
564 memif_main_t *mm = &memif_main;
566 memif_socket_file_t *msf;
568 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
571 /* Don't delete non-existent entries. */
572 return VNET_API_ERROR_INVALID_ARGUMENT;
575 msf = pool_elt_at_index (mm->socket_files, *p);
576 if (msf->ref_cnt > 0)
578 return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
581 vec_free (msf->filename);
582 pool_put (mm->socket_files, msf);
584 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
590 memif_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename)
592 if (sock_id == 0 || sock_id == ~0)
594 return VNET_API_ERROR_INVALID_ARGUMENT;
599 return memif_delete_socket_file (sock_id);
602 if (sock_filename == 0 || sock_filename[0] == 0)
604 return VNET_API_ERROR_INVALID_ARGUMENT;
607 if (sock_filename[0] != '/')
610 error = vlib_unix_recursive_mkdir (vlib_unix_get_runtime_dir ());
613 clib_error_free (error);
614 return VNET_API_ERROR_SYSCALL_ERROR_1;
617 sock_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
622 sock_filename = vec_dup (sock_filename);
625 return memif_add_socket_file (sock_id, sock_filename);
629 memif_delete_if (vlib_main_t * vm, memif_if_t * mif)
631 vnet_main_t *vnm = vnet_get_main ();
632 memif_main_t *mm = &memif_main;
633 memif_socket_file_t *msf =
634 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
637 mif->flags |= MEMIF_IF_FLAG_DELETING;
638 vec_free (mif->local_disc_string);
639 vec_free (mif->remote_disc_string);
641 /* bring down the interface */
642 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
643 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
645 err = clib_error_return (0, "interface deleted");
646 memif_disconnect (mif, err);
647 clib_error_free (err);
649 if (mif->hw_if_index != ~0)
651 /* remove the interface */
652 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
653 vnet_delete_hw_interface (vnm, mif->hw_if_index);
655 ethernet_delete_interface (vnm, mif->hw_if_index);
656 mif->hw_if_index = ~0;
659 /* free interface data structures */
660 clib_spinlock_free (&mif->lockp);
661 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
663 /* remove socket file */
664 if (--(msf->ref_cnt) == 0)
666 if (msf->is_listener)
670 vec_foreach_index (i, msf->pending_clients)
671 memif_socket_close (msf->pending_clients + i);
673 memif_socket_close (&msf->sock);
674 vec_free (msf->pending_clients);
676 mhash_free (&msf->dev_instance_by_id);
677 hash_free (msf->dev_instance_by_fd);
680 err = clib_socket_close (msf->sock);
682 clib_error_report (err);
683 clib_mem_free (msf->sock);
687 memset (mif, 0, sizeof (*mif));
688 pool_put (mm->interfaces, mif);
690 if (pool_elts (mm->interfaces) == 0)
691 vlib_process_signal_event (vm, memif_process_node.index,
692 MEMIF_PROCESS_EVENT_STOP, 0);
698 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) =
701 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
706 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
708 memif_main_t *mm = &memif_main;
709 vlib_thread_main_t *tm = vlib_get_thread_main ();
710 vnet_main_t *vnm = vnet_get_main ();
712 vnet_sw_interface_t *sw;
713 clib_error_t *error = 0;
716 vnet_hw_interface_t *hw;
717 memif_socket_file_t *msf = 0;
720 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
723 rv = VNET_API_ERROR_INVALID_ARGUMENT;
727 msf = vec_elt_at_index (mm->socket_files, p[0]);
729 /* existing socket file can be either master or slave but cannot be both */
730 if (msf->ref_cnt > 0)
732 if ((!msf->is_listener != !args->is_master))
734 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
738 p = mhash_get (&msf->dev_instance_by_id, &args->id);
741 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
746 /* Create new socket file */
747 if (msf->ref_cnt == 0)
749 struct stat file_stat;
751 /* If we are creating listener make sure file doesn't exist or if it
752 * exists thn delete it if it is old socket file */
753 if (args->is_master && (stat ((char *) msf->filename, &file_stat) == 0))
755 if (S_ISSOCK (file_stat.st_mode))
757 unlink ((char *) msf->filename);
761 error = clib_error_return (0, "File exists for %s",
763 clib_error_report (error);
764 rv = VNET_API_ERROR_VALUE_EXIST;
769 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
770 sizeof (memif_interface_id_t));
771 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
772 msf->is_listener = (args->is_master != 0);
774 DBG ("initializing socket file %s", msf->filename);
777 if (mm->per_thread_data == 0)
780 vlib_buffer_free_list_t *fl;
782 vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
783 CLIB_CACHE_LINE_BYTES);
786 vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
787 for (i = 0; i < tm->n_vlib_mains; i++)
789 memif_per_thread_data_t *ptd =
790 vec_elt_at_index (mm->per_thread_data, i);
791 vlib_buffer_t *bt = &ptd->buffer_template;
792 vlib_buffer_init_for_free_list (bt, fl);
793 bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
794 bt->total_length_not_including_first_buffer = 0;
795 vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
797 /* initially prealloc copy_ops so we can use
798 _vec_len instead of vec_elen */
799 vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
800 vec_reset_length (ptd->copy_ops);
801 vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
802 vec_reset_length (ptd->buffers);
806 pool_get (mm->interfaces, mif);
807 memset (mif, 0, sizeof (*mif));
808 mif->dev_instance = mif - mm->interfaces;
809 mif->socket_file_index = msf - mm->socket_files;
811 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
812 mif->mode = args->mode;
814 mif->secret = vec_dup (args->secret);
816 if (tm->n_vlib_mains > 1)
817 clib_spinlock_init (&mif->lockp);
819 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
822 if (!args->hw_addr_set)
824 f64 now = vlib_time_now (vm);
826 rnd = (u32) (now * 1e6);
827 rnd = random_u32 (&rnd);
829 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
830 args->hw_addr[0] = 2;
831 args->hw_addr[1] = 0xfe;
833 error = ethernet_register_interface (vnm, memif_device_class.index,
834 mif->dev_instance, args->hw_addr,
836 memif_eth_flag_change);
838 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
841 vnet_register_interface (vnm, memif_device_class.index,
843 memif_ip_hw_if_class.index,
847 error = clib_error_return (0, "unsupported interface mode");
851 clib_error_report (error);
852 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
856 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
857 mif->sw_if_index = sw->sw_if_index;
859 mif->cfg.log2_ring_size = args->log2_ring_size;
860 mif->cfg.buffer_size = args->buffer_size;
861 mif->cfg.num_s2m_rings =
862 args->is_master ? args->rx_queues : args->tx_queues;
863 mif->cfg.num_m2s_rings =
864 args->is_master ? args->tx_queues : args->rx_queues;
866 args->sw_if_index = mif->sw_if_index;
868 /* If this is new one, start listening */
869 if (msf->is_listener && msf->ref_cnt == 0)
871 struct stat file_stat;
872 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
874 ASSERT (msf->sock == 0);
877 memset (s, 0, sizeof (clib_socket_t));
878 s->config = (char *) msf->filename;
879 s->flags = CLIB_SOCKET_F_IS_SERVER |
880 CLIB_SOCKET_F_ALLOW_GROUP_WRITE |
881 CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_PASSCRED;
883 if ((error = clib_socket_init (s)))
885 clib_error_report (error);
886 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
890 if (stat ((char *) msf->filename, &file_stat) == -1)
892 ret = VNET_API_ERROR_SYSCALL_ERROR_8;
896 clib_file_t template = { 0 };
897 template.read_function = memif_conn_fd_accept_ready;
898 template.file_descriptor = msf->sock->fd;
899 template.private_data = mif->socket_file_index;
900 template.description = format (0, "memif listener %s", msf->filename);
901 memif_file_add (&msf->sock->private_data, &template);
906 if (args->is_master == 0)
908 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
909 if (args->is_zero_copy)
910 mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
913 hw = vnet_get_hw_interface (vnm, mif->hw_if_index);
914 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
915 vnet_hw_interface_set_input_node (vnm, mif->hw_if_index,
916 memif_input_node.index);
918 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
920 if (pool_elts (mm->interfaces) == 1)
922 vlib_process_signal_event (vm, memif_process_node.index,
923 MEMIF_PROCESS_EVENT_START, 0);
928 if (mif->hw_if_index != ~0)
930 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
931 vnet_delete_hw_interface (vnm, mif->hw_if_index);
933 ethernet_delete_interface (vnm, mif->hw_if_index);
934 mif->hw_if_index = ~0;
936 memif_delete_if (vm, mif);
944 static clib_error_t *
945 memif_init (vlib_main_t * vm)
947 memif_main_t *mm = &memif_main;
950 memset (mm, 0, sizeof (memif_main_t));
952 /* initialize binary API */
953 memif_plugin_api_hookup (vm);
956 * Pre-stuff socket filename pool with a non-modifieable mapping
957 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
958 * default run-time directory.
960 filename = format (0, "%s/%s%c",
961 vlib_unix_get_runtime_dir (),
962 MEMIF_DEFAULT_SOCKET_FILENAME, 0);
963 memif_add_socket_file (0, filename);
968 VLIB_INIT_FUNCTION (memif_init);
971 VLIB_PLUGIN_REGISTER () = {
972 .version = VPP_BUILD_VER,
973 .description = "Packet Memory Interface (experimetal)",
978 * fd.io coding-style-patch-verification: ON
981 * eval: (c-set-style "gnu")