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 memif_main_t *mm = &memif_main;
235 vlib_main_t *vm = vlib_get_main ();
236 vnet_main_t *vnm = vnet_get_main ();
237 clib_file_t template = { 0 };
240 u32 n_txqs = 0, n_threads = vlib_get_n_threads ();
241 clib_error_t *err = NULL;
242 u8 max_log2_ring_sz = 0;
244 memif_log_debug (mif, "connect %u", mif->dev_instance);
246 vec_free (mif->local_disc_string);
247 vec_free (mif->remote_disc_string);
250 vec_foreach (mr, mif->regions)
257 err = clib_error_return (0, "no memory region fd");
261 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
262 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
264 err = clib_error_return_unix (0, "mmap");
270 template.read_function = memif_int_fd_read_ready;
271 template.write_function = memif_int_fd_write_ready;
274 vec_foreach_index (i, mif->tx_queues)
276 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
277 max_log2_ring_sz = clib_max (max_log2_ring_sz, mq->log2_ring_size);
279 mq->ring = mif->regions[mq->region].shm + mq->offset;
280 if (mq->ring->cookie != MEMIF_COOKIE)
282 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
286 vnet_hw_if_register_tx_queue (vnm, mif->hw_if_index, i);
287 clib_spinlock_init (&mq->lockp);
290 if (vec_len (mif->tx_queues) > 0)
292 n_txqs = vec_len (mif->tx_queues);
293 for (j = 0; j < n_threads; j++)
295 u32 qi = mif->tx_queues[j % n_txqs].queue_index;
296 vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
300 vec_foreach_index (i, mif->rx_queues)
302 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
307 max_log2_ring_sz = clib_max (max_log2_ring_sz, mq->log2_ring_size);
309 mq->ring = mif->regions[mq->region].shm + mq->offset;
310 if (mq->ring->cookie != MEMIF_COOKIE)
312 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
315 qi = vnet_hw_if_register_rx_queue (vnm, mif->hw_if_index, i,
316 VNET_HW_IF_RXQ_THREAD_ANY);
317 mq->queue_index = qi;
320 template.file_descriptor = mq->int_fd;
321 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
322 template.description = format (0, "%U rx %u int",
323 format_memif_device_name,
324 mif->dev_instance, i);
325 memif_file_add (&mq->int_clib_file_index, &template);
326 vnet_hw_if_set_rx_queue_file_index (vnm, qi,
327 mq->int_clib_file_index);
329 ti = vnet_hw_if_get_rx_queue_thread_index (vnm, qi);
330 mq->buffer_pool_index = vlib_buffer_pool_get_default_for_numa (
331 vm, vlib_get_main_by_index (ti)->numa_node);
332 rv = vnet_hw_if_set_rx_queue_mode (vnm, qi, VNET_HW_IF_RX_MODE_DEFAULT);
333 vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
337 (mif, "Warning: unable to set rx mode for interface %d queue %d: "
338 "rc=%d", mif->hw_if_index, i, rv);
341 vnet_hw_if_rx_mode rxmode = vnet_hw_if_get_rx_queue_mode (vnm, qi);
343 if (rxmode == VNET_HW_IF_RX_MODE_POLLING)
344 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
346 vnet_hw_if_rx_queue_set_int_pending (vnm, qi);
351 if (1 << max_log2_ring_sz > vec_len (mm->per_thread_data[0].desc_data))
353 memif_per_thread_data_t *ptd;
354 int with_barrier = 1;
356 if (vlib_worker_thread_barrier_held ())
360 vlib_worker_thread_barrier_sync (vm);
362 vec_foreach (ptd, mm->per_thread_data)
364 vec_validate_aligned (ptd->desc_data, pow2_mask (max_log2_ring_sz),
365 CLIB_CACHE_LINE_BYTES);
366 vec_validate_aligned (ptd->desc_len, pow2_mask (max_log2_ring_sz),
367 CLIB_CACHE_LINE_BYTES);
368 vec_validate_aligned (ptd->desc_status, pow2_mask (max_log2_ring_sz),
369 CLIB_CACHE_LINE_BYTES);
372 vlib_worker_thread_barrier_release (vm);
375 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
376 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
378 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
379 VNET_HW_INTERFACE_FLAG_LINK_UP);
383 memif_log_err (mif, "%U", format_clib_error, err);
387 static_always_inline memif_ring_t *
388 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
390 if (vec_len (mif->regions) == 0)
392 void *p = mif->regions[0].shm;
394 sizeof (memif_ring_t) +
395 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
396 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
398 return (memif_ring_t *) p;
402 memif_init_regions_and_queues (memif_if_t * mif)
404 vlib_main_t *vm = vlib_get_main ();
405 memif_socket_file_t *msf;
406 memif_ring_t *ring = NULL;
412 ASSERT (vec_len (mif->regions) == 0);
413 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
415 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
416 (sizeof (memif_ring_t) +
417 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
419 r->region_size = buffer_offset;
421 if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
422 r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
423 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
425 if ((fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT, "%U region 0",
426 format_memif_device_name,
427 mif->dev_instance)) == -1)
429 err = clib_mem_get_last_error ();
433 if ((ftruncate (fd, r->region_size)) == -1)
435 err = clib_error_return_unix (0, "ftruncate");
439 msf = pool_elt_at_index (memif_main.socket_files, mif->socket_file_index);
440 r->shm = clib_mem_vm_map_shared (0, r->region_size, fd, 0, "memif%lu/%lu:0",
441 msf->socket_id, mif->id);
443 if (r->shm == CLIB_MEM_VM_MAP_FAILED)
445 err = clib_error_return_unix (0, "memif shared region map failed");
451 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
453 vlib_buffer_pool_t *bp;
455 vec_foreach (bp, vm->buffer_main->buffer_pools)
457 vlib_physmem_map_t *pm;
458 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
459 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
461 r->region_size = pm->n_pages << pm->log2_page_size;
468 for (i = 0; i < mif->run.num_s2m_rings; i++)
470 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
471 ring->head = ring->tail = 0;
472 ring->cookie = MEMIF_COOKIE;
474 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
477 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
479 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
480 ring->desc[j].region = 0;
481 ring->desc[j].offset =
482 buffer_offset + (u32) (slot * mif->run.buffer_size);
483 ring->desc[j].length = mif->run.buffer_size;
486 for (i = 0; i < mif->run.num_m2s_rings; i++)
488 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
489 ring->head = ring->tail = 0;
490 ring->cookie = MEMIF_COOKIE;
492 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
495 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
498 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
499 ring->desc[j].region = 0;
500 ring->desc[j].offset =
501 buffer_offset + (u32) (slot * mif->run.buffer_size);
502 ring->desc[j].length = mif->run.buffer_size;
506 ASSERT (mif->tx_queues == 0);
507 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
508 CLIB_CACHE_LINE_BYTES);
511 vec_foreach_index (i, mif->tx_queues)
513 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
514 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
516 err = clib_error_return_unix (0, "eventfd[tx queue %u]", i);
520 mq->int_clib_file_index = ~0;
521 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
522 mq->log2_ring_size = mif->cfg.log2_ring_size;
524 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
526 mq->type = MEMIF_RING_S2M;
527 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
528 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
529 CLIB_CACHE_LINE_BYTES);
533 ASSERT (mif->rx_queues == 0);
534 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
535 CLIB_CACHE_LINE_BYTES);
538 vec_foreach_index (i, mif->rx_queues)
540 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
541 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
543 err = clib_error_return_unix (0, "eventfd[rx queue %u]", i);
546 mq->int_clib_file_index = ~0;
547 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
548 mq->log2_ring_size = mif->cfg.log2_ring_size;
550 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
552 mq->type = MEMIF_RING_M2S;
553 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
554 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
555 CLIB_CACHE_LINE_BYTES);
562 memif_log_err (mif, "%U", format_clib_error, err);
567 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
569 memif_main_t *mm = &memif_main;
572 uword *event_data = 0, event_type;
574 f64 start_time, last_run_duration = 0, now;
577 sock = clib_mem_alloc (sizeof (clib_socket_t));
578 clib_memset (sock, 0, sizeof (clib_socket_t));
583 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
586 vlib_process_wait_for_event (vm);
588 event_type = vlib_process_get_events (vm, &event_data);
589 vec_reset_length (event_data);
595 case MEMIF_PROCESS_EVENT_START:
598 case MEMIF_PROCESS_EVENT_STOP:
601 case MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN:
607 last_run_duration = start_time = vlib_time_now (vm);
609 pool_foreach (mif, mm->interfaces)
611 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
612 /* Allow no more than 10us without a pause */
613 now = vlib_time_now (vm);
614 if (now > start_time + 10e-6)
616 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
617 start_time = vlib_time_now (vm);
620 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
623 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
626 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
629 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
631 clib_memset (sock, 0, sizeof(clib_socket_t));
632 sock->config = (char *) msf->filename;
633 sock->flags = CLIB_SOCKET_F_IS_CLIENT | CLIB_SOCKET_F_SEQPACKET |
634 CLIB_SOCKET_F_BLOCKING;
636 if ((err = clib_socket_init (sock)))
638 clib_error_free (err);
642 clib_file_t t = { 0 };
644 t.read_function = memif_slave_conn_fd_read_ready;
645 t.write_function = memif_slave_conn_fd_write_ready;
646 t.error_function = memif_slave_conn_fd_error;
647 t.file_descriptor = sock->fd;
648 t.private_data = mif->dev_instance;
649 memif_file_add (&sock->private_data, &t);
650 t.description = format (0, "%U ctl",
651 format_memif_device_name,
653 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
655 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
657 sock = clib_mem_alloc (sizeof(clib_socket_t));
662 last_run_duration = vlib_time_now (vm) - last_run_duration;
668 VLIB_REGISTER_NODE (memif_process_node,static) = {
669 .function = memif_process,
670 .type = VLIB_NODE_TYPE_PROCESS,
671 .name = "memif-process",
676 memif_add_socket_file (u32 sock_id, u8 * socket_filename)
678 memif_main_t *mm = &memif_main;
680 memif_socket_file_t *msf;
682 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
685 msf = pool_elt_at_index (mm->socket_files, *p);
686 if (strcmp ((char *) msf->filename, (char *) socket_filename) == 0)
688 /* Silently accept identical "add". */
692 /* But don't allow a direct add of a different filename. */
693 return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
696 pool_get (mm->socket_files, msf);
697 clib_memset (msf, 0, sizeof (memif_socket_file_t));
699 msf->filename = socket_filename;
700 msf->socket_id = sock_id;
702 hash_set (mm->socket_file_index_by_sock_id, sock_id,
703 msf - mm->socket_files);
709 memif_delete_socket_file (u32 sock_id)
711 memif_main_t *mm = &memif_main;
713 memif_socket_file_t *msf;
715 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
718 /* Don't delete non-existent entries. */
719 return VNET_API_ERROR_INVALID_ARGUMENT;
722 msf = pool_elt_at_index (mm->socket_files, *p);
723 if (msf->ref_cnt > 0)
725 return VNET_API_ERROR_UNEXPECTED_INTF_STATE;
728 vec_free (msf->filename);
729 pool_put (mm->socket_files, msf);
731 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
737 memif_socket_filename_add_del (u8 is_add, u32 sock_id, u8 * sock_filename)
742 /* allow adding socket id 0 */
743 if ((sock_id == 0 && is_add == 0) || sock_id == ~0)
745 return VNET_API_ERROR_INVALID_ARGUMENT;
750 return memif_delete_socket_file (sock_id);
753 if (sock_filename == 0 || sock_filename[0] == 0)
755 return VNET_API_ERROR_INVALID_ARGUMENT;
758 if (sock_filename[0] != '/')
762 /* copy runtime dir path */
763 vec_add (dir, vlib_unix_get_runtime_dir (),
764 strlen (vlib_unix_get_runtime_dir ()));
767 /* if sock_filename contains dirs, add them to path */
768 tmp = strrchr ((char *) sock_filename, '/');
771 idx = tmp - (char *) sock_filename;
772 vec_add (dir, sock_filename, idx);
775 vec_add1 (dir, '\0');
776 /* create socket dir */
777 error = vlib_unix_recursive_mkdir (dir);
780 clib_error_free (error);
781 return VNET_API_ERROR_SYSCALL_ERROR_1;
784 sock_filename = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
789 sock_filename = vec_dup (sock_filename);
791 /* check if directory exists */
792 tmp = strrchr ((char *) sock_filename, '/');
795 idx = tmp - (char *) sock_filename;
796 vec_add (dir, sock_filename, idx);
797 vec_add1 (dir, '\0');
800 /* check dir existance and access rights for effective user/group IDs */
803 (faccessat ( /* ignored */ -1, dir, F_OK | R_OK | W_OK, AT_EACCESS)
807 return VNET_API_ERROR_INVALID_ARGUMENT;
812 return memif_add_socket_file (sock_id, sock_filename);
816 memif_delete_if (vlib_main_t * vm, memif_if_t * mif)
818 vnet_main_t *vnm = vnet_get_main ();
819 memif_main_t *mm = &memif_main;
820 memif_socket_file_t *msf =
821 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
824 mif->flags |= MEMIF_IF_FLAG_DELETING;
825 vec_free (mif->local_disc_string);
826 vec_free (mif->remote_disc_string);
828 /* bring down the interface */
829 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
830 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
832 err = clib_error_return (0, "interface deleted");
833 memif_disconnect (mif, err);
834 clib_error_free (err);
836 if (mif->hw_if_index != ~0)
838 /* remove the interface */
839 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
840 vnet_delete_hw_interface (vnm, mif->hw_if_index);
842 ethernet_delete_interface (vnm, mif->hw_if_index);
843 mif->hw_if_index = ~0;
846 /* free interface data structures */
847 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
849 /* remove socket file */
850 if (--(msf->ref_cnt) == 0)
852 if (msf->is_listener)
856 vec_foreach_index (i, msf->pending_clients)
857 memif_socket_close (msf->pending_clients + i);
859 memif_socket_close (&msf->sock);
860 vec_free (msf->pending_clients);
862 mhash_free (&msf->dev_instance_by_id);
863 hash_free (msf->dev_instance_by_fd);
866 err = clib_socket_close (msf->sock);
869 memif_log_err (mif, "%U", format_clib_error, err);
870 clib_error_free (err);
872 clib_mem_free (msf->sock);
876 clib_memset (mif, 0, sizeof (*mif));
877 pool_put (mm->interfaces, mif);
879 if (pool_elts (mm->interfaces) == 0)
880 vlib_process_signal_event (vm, memif_process_node.index,
881 MEMIF_PROCESS_EVENT_STOP, 0);
887 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) = {
889 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
890 .tx_hash_fn_type = VNET_HASH_FN_TYPE_IP,
895 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
897 memif_main_t *mm = &memif_main;
898 vlib_thread_main_t *tm = vlib_get_thread_main ();
899 vnet_main_t *vnm = vnet_get_main ();
900 vnet_eth_interface_registration_t eir = {};
902 vnet_sw_interface_t *sw;
903 clib_error_t *error = 0;
906 memif_socket_file_t *msf = 0;
909 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
912 rv = VNET_API_ERROR_INVALID_ARGUMENT;
916 msf = vec_elt_at_index (mm->socket_files, p[0]);
918 /* existing socket file can be either master or slave but cannot be both */
919 if (msf->ref_cnt > 0)
921 if ((!msf->is_listener != !args->is_master))
923 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
927 p = mhash_get (&msf->dev_instance_by_id, &args->id);
930 rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
935 /* Create new socket file */
936 if (msf->ref_cnt == 0)
938 struct stat file_stat;
940 /* If we are creating listener make sure file doesn't exist or if it
941 * exists thn delete it if it is old socket file */
942 if (args->is_master && (stat ((char *) msf->filename, &file_stat) == 0))
944 if (S_ISSOCK (file_stat.st_mode))
946 unlink ((char *) msf->filename);
950 error = clib_error_return (0, "File exists for %s",
952 rv = VNET_API_ERROR_VALUE_EXIST;
957 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
958 sizeof (memif_interface_id_t));
959 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
960 msf->is_listener = (args->is_master != 0);
962 memif_log_debug (0, "initializing socket file %s", msf->filename);
965 if (mm->per_thread_data == 0)
969 vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
970 CLIB_CACHE_LINE_BYTES);
972 for (i = 0; i < tm->n_vlib_mains; i++)
974 memif_per_thread_data_t *ptd =
975 vec_elt_at_index (mm->per_thread_data, i);
976 vlib_buffer_t *bt = &ptd->buffer_template;
977 clib_memset (bt, 0, sizeof (vlib_buffer_t));
978 bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
979 bt->total_length_not_including_first_buffer = 0;
980 vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
982 /* initially prealloc copy_ops so we can use
983 _vec_len instead of vec_elen */
984 vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
985 vec_reset_length (ptd->copy_ops);
986 vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
987 vec_reset_length (ptd->buffers);
991 pool_get (mm->interfaces, mif);
992 clib_memset (mif, 0, sizeof (*mif));
993 mif->dev_instance = mif - mm->interfaces;
994 mif->socket_file_index = msf - mm->socket_files;
996 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
997 mif->mode = args->mode;
999 mif->secret = vec_dup (args->secret);
1001 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
1004 if (!args->hw_addr_set)
1006 f64 now = vlib_time_now (vm);
1008 rnd = (u32) (now * 1e6);
1009 rnd = random_u32 (&rnd);
1011 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
1012 args->hw_addr[0] = 2;
1013 args->hw_addr[1] = 0xfe;
1016 eir.dev_class_index = memif_device_class.index;
1017 eir.dev_instance = mif->dev_instance;
1018 eir.address = args->hw_addr;
1019 eir.cb.flag_change = memif_eth_flag_change;
1020 mif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
1022 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1025 vnet_register_interface (vnm, memif_device_class.index,
1027 memif_ip_hw_if_class.index,
1031 error = clib_error_return (0, "unsupported interface mode");
1035 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
1039 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
1040 mif->sw_if_index = sw->sw_if_index;
1042 mif->cfg.log2_ring_size = args->log2_ring_size;
1043 mif->cfg.buffer_size = args->buffer_size;
1044 mif->cfg.num_s2m_rings =
1045 args->is_master ? args->rx_queues : args->tx_queues;
1046 mif->cfg.num_m2s_rings =
1047 args->is_master ? args->tx_queues : args->rx_queues;
1049 args->sw_if_index = mif->sw_if_index;
1051 /* If this is new one, start listening */
1052 if (msf->is_listener && msf->ref_cnt == 0)
1054 struct stat file_stat;
1055 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
1057 ASSERT (msf->sock == 0);
1060 clib_memset (s, 0, sizeof (clib_socket_t));
1061 s->config = (char *) msf->filename;
1062 s->flags = CLIB_SOCKET_F_IS_SERVER |
1063 CLIB_SOCKET_F_ALLOW_GROUP_WRITE |
1064 CLIB_SOCKET_F_SEQPACKET | CLIB_SOCKET_F_PASSCRED;
1066 if ((error = clib_socket_init (s)))
1068 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
1072 if (stat ((char *) msf->filename, &file_stat) == -1)
1074 ret = VNET_API_ERROR_SYSCALL_ERROR_8;
1078 clib_file_t template = { 0 };
1079 template.read_function = memif_conn_fd_accept_ready;
1080 template.file_descriptor = msf->sock->fd;
1081 template.private_data = mif->socket_file_index;
1082 template.description = format (0, "memif listener %s", msf->filename);
1083 memif_file_add (&msf->sock->private_data, &template);
1088 if (args->is_master == 0)
1090 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
1091 if (args->is_zero_copy)
1092 mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
1095 vnet_hw_if_set_caps (vnm, mif->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
1096 vnet_hw_if_set_input_node (vnm, mif->hw_if_index, memif_input_node.index);
1097 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
1099 if (pool_elts (mm->interfaces) == 1)
1101 vlib_process_signal_event (vm, memif_process_node.index,
1102 MEMIF_PROCESS_EVENT_START, 0);
1107 memif_delete_if (vm, mif);
1110 memif_log_err (mif, "%U", format_clib_error, error);
1111 clib_error_free (error);
1120 memif_interface_admin_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
1122 memif_main_t *mm = &memif_main;
1123 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1124 memif_if_t *mif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
1125 static clib_error_t *error = 0;
1127 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1129 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
1131 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
1132 VNET_HW_INTERFACE_FLAG_LINK_UP);
1134 mif->flags |= MEMIF_IF_FLAG_ADMIN_UP;
1137 mif->flags &= ~MEMIF_IF_FLAG_ADMIN_UP;
1139 vlib_process_signal_event (vnm->vlib_main, memif_process_node.index,
1140 MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN, 0);
1144 static clib_error_t *
1145 memif_init (vlib_main_t * vm)
1147 memif_main_t *mm = &memif_main;
1149 clib_memset (mm, 0, sizeof (memif_main_t));
1151 mm->log_class = vlib_log_register_class ("memif_plugin", 0);
1152 memif_log_debug (0, "initialized");
1154 /* initialize binary API */
1155 memif_plugin_api_hookup (vm);
1158 * Pre-stuff socket filename pool with a non-modifieable mapping
1159 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
1160 * default run-time directory.
1162 memif_socket_filename_add_del (1, 0, (u8 *) MEMIF_DEFAULT_SOCKET_FILENAME);
1167 VLIB_INIT_FUNCTION (memif_init);
1170 VLIB_PLUGIN_REGISTER () = {
1171 .version = VPP_BUILD_VER,
1172 .description = "Packet Memory Interface (memif) -- Experimental",
1177 * fd.io coding-style-patch-verification: ON
1180 * eval: (c-set-style "gnu")