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_free_zc_queue_buffer (memif_queue_t * mq, u8 is_rx)
71 vlib_main_t *vm = vlib_get_main ();
72 u16 ring_size, n_slots, mask, start;
74 ring_size = 1 << mq->log2_ring_size;
76 n_slots = mq->ring->head - mq->last_tail;
77 start = mq->last_tail & mask;
79 vlib_buffer_free_from_ring (vm, mq->buffers, start, ring_size, n_slots);
81 vlib_buffer_free_from_ring_no_next (vm, mq->buffers, start, ring_size,
83 vec_free (mq->buffers);
87 memif_disconnect (memif_if_t * mif, clib_error_t * err)
89 memif_main_t *mm = &memif_main;
90 vnet_main_t *vnm = vnet_get_main ();
98 memif_log_debug (mif, "disconnect %u (%v)", mif->dev_instance,
104 mif->local_disc_string = vec_dup (err->what);
105 if (mif->sock && clib_socket_is_connected (mif->sock))
106 e = memif_msg_send_disconnect (mif, err);
110 /* set interface down */
111 mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
112 if (mif->hw_if_index != ~0)
113 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
115 /* close connection socket */
116 if (mif->sock && mif->sock->fd)
118 memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files,
119 mif->socket_file_index);
120 hash_unset (msf->dev_instance_by_fd, mif->sock->fd);
121 memif_socket_close (&mif->sock);
126 err = clib_socket_close (mif->sock);
129 memif_log_err (mif, "%U", format_clib_error, err);
130 clib_error_free (err);
132 clib_mem_free (mif->sock);
136 vec_foreach_index (i, mif->rx_queues)
138 mq = vec_elt_at_index (mif->rx_queues, i);
142 rv = vnet_hw_interface_unassign_rx_thread (vnm, mif->hw_if_index, i);
145 "Unable to unassign interface %d, queue %d: rc=%d",
146 mif->hw_if_index, i, rv);
147 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
149 memif_disconnect_free_zc_queue_buffer(mq, 1);
156 vec_foreach_index (i, mif->tx_queues)
158 mq = vec_elt_at_index (mif->tx_queues, i);
161 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
163 memif_disconnect_free_zc_queue_buffer(mq, 0);
169 /* free tx and rx queues */
170 vec_foreach (mq, mif->rx_queues)
171 memif_queue_intfd_close (mq);
172 vec_free (mif->rx_queues);
174 vec_foreach (mq, mif->tx_queues)
175 memif_queue_intfd_close (mq);
176 vec_free (mif->tx_queues);
178 /* free memory regions */
179 vec_foreach (mr, mif->regions)
184 if ((rv = munmap (mr->shm, mr->region_size)))
185 memif_log_err (mif, "munmap failed, rv = %d", rv);
190 vec_free (mif->regions);
191 vec_free (mif->remote_name);
192 vec_free (mif->remote_if_name);
193 clib_fifo_free (mif->msg_queue);
196 static clib_error_t *
197 memif_int_fd_write_ready (clib_file_t * uf)
199 memif_main_t *mm = &memif_main;
200 u16 qid = uf->private_data & 0xFFFF;
201 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
203 memif_log_warn (mif, "unexpected EPOLLOUT on RX for queue %u", qid);
207 static clib_error_t *
208 memif_int_fd_read_ready (clib_file_t * uf)
210 memif_main_t *mm = &memif_main;
211 vnet_main_t *vnm = vnet_get_main ();
212 u16 qid = uf->private_data & 0xFFFF;
213 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
214 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
218 size = read (uf->file_descriptor, &b, sizeof (b));
221 memif_log_debug (mif, "Failed to read from socket");
225 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, qid);
233 memif_connect (memif_if_t * mif)
235 vlib_main_t *vm = vlib_get_main ();
236 vnet_main_t *vnm = vnet_get_main ();
237 clib_file_t template = { 0 };
240 clib_error_t *err = NULL;
242 memif_log_debug (mif, "connect %u", mif->dev_instance);
244 vec_free (mif->local_disc_string);
245 vec_free (mif->remote_disc_string);
248 vec_foreach (mr, mif->regions)
255 err = clib_error_return (0, "no memory region fd");
259 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
260 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
262 err = clib_error_return_unix (0, "mmap");
268 template.read_function = memif_int_fd_read_ready;
269 template.write_function = memif_int_fd_write_ready;
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);
284 vec_foreach_index (i, mif->rx_queues)
286 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
290 mq->ring = mif->regions[mq->region].shm + mq->offset;
291 if (mq->ring->cookie != MEMIF_COOKIE)
293 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
299 template.file_descriptor = mq->int_fd;
300 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
301 template.description = format (0, "%U rx %u int",
302 format_memif_device_name,
303 mif->dev_instance, i);
304 memif_file_add (&mq->int_clib_file_index, &template);
306 vnet_hw_interface_assign_rx_thread (vnm, mif->hw_if_index, i, ~0);
307 ti = vnet_get_device_input_thread_index (vnm, mif->hw_if_index, i);
308 mq->buffer_pool_index =
309 vlib_buffer_pool_get_default_for_numa (vm, vlib_mains[ti]->numa_node);
310 rv = vnet_hw_interface_set_rx_mode (vnm, mif->hw_if_index, i,
311 VNET_HW_IF_RX_MODE_DEFAULT);
314 (mif, "Warning: unable to set rx mode for interface %d queue %d: "
315 "rc=%d", mif->hw_if_index, i, rv);
318 vnet_hw_if_rx_mode rxmode;
319 vnet_hw_interface_get_rx_mode (vnm, mif->hw_if_index, i, &rxmode);
321 if (rxmode == VNET_HW_IF_RX_MODE_POLLING)
322 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
324 vnet_device_input_set_interrupt_pending (vnm, mif->hw_if_index, i);
329 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
330 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
332 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
333 VNET_HW_INTERFACE_FLAG_LINK_UP);
337 memif_log_err (mif, "%U", format_clib_error, err);
341 static_always_inline memif_ring_t *
342 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
344 if (vec_len (mif->regions) == 0)
346 void *p = mif->regions[0].shm;
348 sizeof (memif_ring_t) +
349 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
350 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
352 return (memif_ring_t *) p;
356 memif_init_regions_and_queues (memif_if_t * mif)
358 vlib_main_t *vm = vlib_get_main ();
359 memif_socket_file_t *msf;
360 memif_ring_t *ring = NULL;
366 ASSERT (vec_len (mif->regions) == 0);
367 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
369 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
370 (sizeof (memif_ring_t) +
371 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
373 r->region_size = buffer_offset;
375 if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
376 r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
377 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
379 if ((fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT, "%U region 0",
380 format_memif_device_name,
381 mif->dev_instance)) == -1)
383 err = clib_mem_get_last_error ();
387 if ((ftruncate (fd, r->region_size)) == -1)
389 err = clib_error_return_unix (0, "ftruncate");
393 msf = pool_elt_at_index (memif_main.socket_files, mif->socket_file_index);
394 r->shm = clib_mem_vm_map_shared (0, r->region_size, fd, 0, "memif%lu/%lu:0",
395 msf->socket_id, mif->id);
397 if (r->shm == CLIB_MEM_VM_MAP_FAILED)
399 err = clib_error_return_unix (0, "memif shared region map failed");
405 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
407 vlib_buffer_pool_t *bp;
409 vec_foreach (bp, vm->buffer_main->buffer_pools)
411 vlib_physmem_map_t *pm;
412 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
413 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
415 r->region_size = pm->n_pages << pm->log2_page_size;
422 for (i = 0; i < mif->run.num_s2m_rings; i++)
424 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
425 ring->head = ring->tail = 0;
426 ring->cookie = MEMIF_COOKIE;
428 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
431 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
433 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
434 ring->desc[j].region = 0;
435 ring->desc[j].offset =
436 buffer_offset + (u32) (slot * mif->run.buffer_size);
437 ring->desc[j].length = mif->run.buffer_size;
440 for (i = 0; i < mif->run.num_m2s_rings; i++)
442 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
443 ring->head = ring->tail = 0;
444 ring->cookie = MEMIF_COOKIE;
446 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
449 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
452 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
453 ring->desc[j].region = 0;
454 ring->desc[j].offset =
455 buffer_offset + (u32) (slot * mif->run.buffer_size);
456 ring->desc[j].length = mif->run.buffer_size;
460 ASSERT (mif->tx_queues == 0);
461 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
462 CLIB_CACHE_LINE_BYTES);
465 vec_foreach_index (i, mif->tx_queues)
467 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
468 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
470 err = clib_error_return_unix (0, "eventfd[tx queue %u]", i);
473 mq->int_clib_file_index = ~0;
474 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
475 mq->log2_ring_size = mif->cfg.log2_ring_size;
477 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
479 mq->type = MEMIF_RING_S2M;
480 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
481 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
482 CLIB_CACHE_LINE_BYTES);
486 ASSERT (mif->rx_queues == 0);
487 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
488 CLIB_CACHE_LINE_BYTES);
491 vec_foreach_index (i, mif->rx_queues)
493 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
494 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
496 err = clib_error_return_unix (0, "eventfd[rx queue %u]", i);
499 mq->int_clib_file_index = ~0;
500 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
501 mq->log2_ring_size = mif->cfg.log2_ring_size;
503 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
505 mq->type = MEMIF_RING_M2S;
506 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
507 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
508 CLIB_CACHE_LINE_BYTES);
515 memif_log_err (mif, "%U", format_clib_error, err);
520 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
522 memif_main_t *mm = &memif_main;
525 uword *event_data = 0, event_type;
527 f64 start_time, last_run_duration = 0, now;
530 sock = clib_mem_alloc (sizeof (clib_socket_t));
531 clib_memset (sock, 0, sizeof (clib_socket_t));
536 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
539 vlib_process_wait_for_event (vm);
541 event_type = vlib_process_get_events (vm, &event_data);
542 vec_reset_length (event_data);
548 case MEMIF_PROCESS_EVENT_START:
551 case MEMIF_PROCESS_EVENT_STOP:
558 last_run_duration = start_time = vlib_time_now (vm);
560 pool_foreach (mif, mm->interfaces,
562 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
563 /* Allow no more than 10us without a pause */
564 now = vlib_time_now (vm);
565 if (now > start_time + 10e-6)
567 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
568 start_time = vlib_time_now (vm);
571 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
574 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
577 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
580 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
582 clib_memset (sock, 0, sizeof(clib_socket_t));
583 sock->config = (char *) msf->filename;
584 sock->flags = CLIB_SOCKET_F_IS_CLIENT| CLIB_SOCKET_F_SEQPACKET;
586 if ((err = clib_socket_init (sock)))
588 clib_error_free (err);
592 clib_file_t t = { 0 };
594 t.read_function = memif_slave_conn_fd_read_ready;
595 t.write_function = memif_slave_conn_fd_write_ready;
596 t.error_function = memif_slave_conn_fd_error;
597 t.file_descriptor = sock->fd;
598 t.private_data = mif->dev_instance;
599 memif_file_add (&sock->private_data, &t);
600 t.description = format (0, "%U ctl",
601 format_memif_device_name,
603 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
605 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
607 sock = clib_mem_alloc (sizeof(clib_socket_t));
612 last_run_duration = vlib_time_now (vm) - last_run_duration;
618 VLIB_REGISTER_NODE (memif_process_node,static) = {
619 .function = memif_process,
620 .type = VLIB_NODE_TYPE_PROCESS,
621 .name = "memif-process",
626 memif_add_socket_file (u32 sock_id, u8 * socket_filename)
628 memif_main_t *mm = &memif_main;
630 memif_socket_file_t *msf;
632 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
635 msf = pool_elt_at_index (mm->socket_files, *p);
636 if (strcmp ((char *) msf->filename, (char *) socket_filename) == 0)
638 /* Silently accept identical "add". */
642 /* But don't allow a direct add of a different filename. */
643 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
646 pool_get (mm->socket_files, msf);
647 clib_memset (msf, 0, sizeof (memif_socket_file_t));
649 msf->filename = socket_filename;
650 msf->socket_id = sock_id;
652 hash_set (mm->socket_file_index_by_sock_id, sock_id,
653 msf - mm->socket_files);
659 memif_delete_socket_file (u32 sock_id)
661 memif_main_t *mm = &memif_main;
663 memif_socket_file_t *msf;
665 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
668 /* Don't delete non-existent entries. */
669 return VNET_API_ERROR_INVALID_ARGUMENT;
672 msf = pool_elt_at_index (mm->socket_files, *p);
673 if (msf->ref_cnt > 0)
675 return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
678 vec_free (msf->filename);
679 pool_put (mm->socket_files, msf);
681 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
687 memif_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename)
692 /* allow adding socket id 0 */
693 if ((sock_id == 0 && is_add == 0) || sock_id == ~0)
695 return VNET_API_ERROR_INVALID_ARGUMENT;
700 return memif_delete_socket_file (sock_id);
703 if (sock_filename == 0 || sock_filename[0] == 0)
705 return VNET_API_ERROR_INVALID_ARGUMENT;
708 if (sock_filename[0] != '/')
712 /* copy runtime dir path */
713 vec_add (dir, vlib_unix_get_runtime_dir (),
714 strlen (vlib_unix_get_runtime_dir ()));
717 /* if sock_filename contains dirs, add them to path */
718 tmp = strrchr ((char *) sock_filename, '/');
721 idx = tmp - (char *) sock_filename;
722 vec_add (dir, sock_filename, idx);
725 vec_add1 (dir, '\0');
726 /* create socket dir */
727 error = vlib_unix_recursive_mkdir (dir);
730 clib_error_free (error);
731 return VNET_API_ERROR_SYSCALL_ERROR_1;
734 sock_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
739 sock_filename = vec_dup (sock_filename);
741 /* check if directory exists */
742 tmp = strrchr ((char *) sock_filename, '/');
745 idx = tmp - (char *) sock_filename;
746 vec_add (dir, sock_filename, idx);
747 vec_add1 (dir, '\0');
750 /* check dir existance and access rights for effective user/group IDs */
753 (faccessat ( /* ignored */ -1, dir, F_OK | R_OK | W_OK, AT_EACCESS)
757 return VNET_API_ERROR_INVALID_ARGUMENT;
762 return memif_add_socket_file (sock_id, sock_filename);
766 memif_delete_if (vlib_main_t * vm, memif_if_t * mif)
768 vnet_main_t *vnm = vnet_get_main ();
769 memif_main_t *mm = &memif_main;
770 memif_socket_file_t *msf =
771 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
774 mif->flags |= MEMIF_IF_FLAG_DELETING;
775 vec_free (mif->local_disc_string);
776 vec_free (mif->remote_disc_string);
778 /* bring down the interface */
779 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
780 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
782 err = clib_error_return (0, "interface deleted");
783 memif_disconnect (mif, err);
784 clib_error_free (err);
786 if (mif->hw_if_index != ~0)
788 /* remove the interface */
789 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
790 vnet_delete_hw_interface (vnm, mif->hw_if_index);
792 ethernet_delete_interface (vnm, mif->hw_if_index);
793 mif->hw_if_index = ~0;
796 /* free interface data structures */
797 clib_spinlock_free (&mif->lockp);
798 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
800 /* remove socket file */
801 if (--(msf->ref_cnt) == 0)
803 if (msf->is_listener)
807 vec_foreach_index (i, msf->pending_clients)
808 memif_socket_close (msf->pending_clients + i);
810 memif_socket_close (&msf->sock);
811 vec_free (msf->pending_clients);
813 mhash_free (&msf->dev_instance_by_id);
814 hash_free (msf->dev_instance_by_fd);
817 err = clib_socket_close (msf->sock);
820 memif_log_err (mif, "%U", format_clib_error, err);
821 clib_error_free (err);
823 clib_mem_free (msf->sock);
827 clib_memset (mif, 0, sizeof (*mif));
828 pool_put (mm->interfaces, mif);
830 if (pool_elts (mm->interfaces) == 0)
831 vlib_process_signal_event (vm, memif_process_node.index,
832 MEMIF_PROCESS_EVENT_STOP, 0);
838 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) =
841 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
846 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
848 memif_main_t *mm = &memif_main;
849 vlib_thread_main_t *tm = vlib_get_thread_main ();
850 vnet_main_t *vnm = vnet_get_main ();
852 vnet_sw_interface_t *sw;
853 clib_error_t *error = 0;
856 vnet_hw_interface_t *hw;
857 memif_socket_file_t *msf = 0;
860 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
863 rv = VNET_API_ERROR_INVALID_ARGUMENT;
867 msf = vec_elt_at_index (mm->socket_files, p[0]);
869 /* existing socket file can be either master or slave but cannot be both */
870 if (msf->ref_cnt > 0)
872 if ((!msf->is_listener != !args->is_master))
874 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
878 p = mhash_get (&msf->dev_instance_by_id, &args->id);
881 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
886 /* Create new socket file */
887 if (msf->ref_cnt == 0)
889 struct stat file_stat;
891 /* If we are creating listener make sure file doesn't exist or if it
892 * exists thn delete it if it is old socket file */
893 if (args->is_master && (stat ((char *) msf->filename, &file_stat) == 0))
895 if (S_ISSOCK (file_stat.st_mode))
897 unlink ((char *) msf->filename);
901 error = clib_error_return (0, "File exists for %s",
903 rv = VNET_API_ERROR_VALUE_EXIST;
908 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
909 sizeof (memif_interface_id_t));
910 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
911 msf->is_listener = (args->is_master != 0);
913 memif_log_debug (0, "initializing socket file %s", msf->filename);
916 if (mm->per_thread_data == 0)
920 vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
921 CLIB_CACHE_LINE_BYTES);
923 for (i = 0; i < tm->n_vlib_mains; i++)
925 memif_per_thread_data_t *ptd =
926 vec_elt_at_index (mm->per_thread_data, i);
927 vlib_buffer_t *bt = &ptd->buffer_template;
928 clib_memset (bt, 0, sizeof (vlib_buffer_t));
929 bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
930 bt->total_length_not_including_first_buffer = 0;
931 vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
933 /* initially prealloc copy_ops so we can use
934 _vec_len instead of vec_elen */
935 vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
936 vec_reset_length (ptd->copy_ops);
937 vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
938 vec_reset_length (ptd->buffers);
942 pool_get (mm->interfaces, mif);
943 clib_memset (mif, 0, sizeof (*mif));
944 mif->dev_instance = mif - mm->interfaces;
945 mif->socket_file_index = msf - mm->socket_files;
947 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
948 mif->mode = args->mode;
950 mif->secret = vec_dup (args->secret);
952 if (tm->n_vlib_mains > 1)
953 clib_spinlock_init (&mif->lockp);
955 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
958 if (!args->hw_addr_set)
960 f64 now = vlib_time_now (vm);
962 rnd = (u32) (now * 1e6);
963 rnd = random_u32 (&rnd);
965 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
966 args->hw_addr[0] = 2;
967 args->hw_addr[1] = 0xfe;
969 error = ethernet_register_interface (vnm, memif_device_class.index,
970 mif->dev_instance, args->hw_addr,
972 memif_eth_flag_change);
974 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
977 vnet_register_interface (vnm, memif_device_class.index,
979 memif_ip_hw_if_class.index,
983 error = clib_error_return (0, "unsupported interface mode");
987 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
991 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
992 mif->sw_if_index = sw->sw_if_index;
994 mif->cfg.log2_ring_size = args->log2_ring_size;
995 mif->cfg.buffer_size = args->buffer_size;
996 mif->cfg.num_s2m_rings =
997 args->is_master ? args->rx_queues : args->tx_queues;
998 mif->cfg.num_m2s_rings =
999 args->is_master ? args->tx_queues : args->rx_queues;
1001 args->sw_if_index = mif->sw_if_index;
1003 /* If this is new one, start listening */
1004 if (msf->is_listener && msf->ref_cnt == 0)
1006 struct stat file_stat;
1007 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
1009 ASSERT (msf->sock == 0);
1012 clib_memset (s, 0, sizeof (clib_socket_t));
1013 s->config = (char *) msf->filename;
1014 s->flags = CLIB_SOCKET_F_IS_SERVER |
1015 CLIB_SOCKET_F_ALLOW_GROUP_WRITE |
1016 CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_PASSCRED;
1018 if ((error = clib_socket_init (s)))
1020 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
1024 if (stat ((char *) msf->filename, &file_stat) == -1)
1026 ret = VNET_API_ERROR_SYSCALL_ERROR_8;
1030 clib_file_t template = { 0 };
1031 template.read_function = memif_conn_fd_accept_ready;
1032 template.file_descriptor = msf->sock->fd;
1033 template.private_data = mif->socket_file_index;
1034 template.description = format (0, "memif listener %s", msf->filename);
1035 memif_file_add (&msf->sock->private_data, &template);
1040 if (args->is_master == 0)
1042 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
1043 if (args->is_zero_copy)
1044 mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
1047 hw = vnet_get_hw_interface (vnm, mif->hw_if_index);
1048 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
1049 vnet_hw_interface_set_input_node (vnm, mif->hw_if_index,
1050 memif_input_node.index);
1052 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
1054 if (pool_elts (mm->interfaces) == 1)
1056 vlib_process_signal_event (vm, memif_process_node.index,
1057 MEMIF_PROCESS_EVENT_START, 0);
1062 if (mif->hw_if_index != ~0)
1064 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1065 vnet_delete_hw_interface (vnm, mif->hw_if_index);
1067 ethernet_delete_interface (vnm, mif->hw_if_index);
1068 mif->hw_if_index = ~0;
1070 memif_delete_if (vm, mif);
1073 memif_log_err (mif, "%U", format_clib_error, error);
1074 clib_error_free (error);
1082 static clib_error_t *
1083 memif_init (vlib_main_t * vm)
1085 memif_main_t *mm = &memif_main;
1087 clib_memset (mm, 0, sizeof (memif_main_t));
1089 mm->log_class = vlib_log_register_class ("memif_plugin", 0);
1090 memif_log_debug (0, "initialized");
1092 /* initialize binary API */
1093 memif_plugin_api_hookup (vm);
1096 * Pre-stuff socket filename pool with a non-modifieable mapping
1097 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
1098 * default run-time directory.
1100 memif_socket_filename_add_del (1, 0, (u8 *) MEMIF_DEFAULT_SOCKET_FILENAME);
1105 VLIB_INIT_FUNCTION (memif_init);
1108 VLIB_PLUGIN_REGISTER () = {
1109 .version = VPP_BUILD_VER,
1110 .description = "Packet Memory Interface (memif) -- Experimental",
1115 * fd.io coding-style-patch-verification: ON
1118 * eval: (c-set-style "gnu")