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/eventfd.h>
33 #include <vlib/vlib.h>
34 #include <vlib/unix/unix.h>
35 #include <vnet/plugin/plugin.h>
36 #include <vnet/ethernet/ethernet.h>
37 #include <vnet/interface/rx_queue_funcs.h>
38 #include <vnet/interface/tx_queue_funcs.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_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
61 memif_queue_intfd_close (memif_queue_t * mq)
63 if (mq->int_clib_file_index != ~0)
65 memif_file_del_by_index (mq->int_clib_file_index);
66 mq->int_clib_file_index = ~0;
69 else if (mq->int_fd > -1)
77 memif_disconnect_free_zc_queue_buffer (memif_queue_t * mq, u8 is_rx)
79 vlib_main_t *vm = vlib_get_main ();
80 u16 ring_size, n_slots, mask, start;
82 ring_size = 1 << mq->log2_ring_size;
84 n_slots = mq->ring->head - mq->last_tail;
85 start = mq->last_tail & mask;
87 vlib_buffer_free_from_ring (vm, mq->buffers, start, ring_size, n_slots);
89 vlib_buffer_free_from_ring_no_next (vm, mq->buffers, start, ring_size,
91 vec_free (mq->buffers);
95 memif_disconnect (memif_if_t * mif, clib_error_t * err)
97 memif_main_t *mm = &memif_main;
98 vnet_main_t *vnm = vnet_get_main ();
102 vlib_main_t *vm = vlib_get_main ();
103 int with_barrier = 0;
108 memif_log_debug (mif, "disconnect %u (%v)", mif->dev_instance,
109 err ? err->what : 0);
114 mif->local_disc_string = vec_dup (err->what);
115 if (mif->sock && clib_socket_is_connected (mif->sock))
116 e = memif_msg_send_disconnect (mif, err);
120 /* set interface down */
121 mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
122 if (mif->hw_if_index != ~0)
123 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
125 /* close connection socket */
126 if (mif->sock && mif->sock->fd)
128 memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files,
129 mif->socket_file_index);
130 hash_unset (msf->dev_instance_by_fd, mif->sock->fd);
131 memif_socket_close (&mif->sock);
136 err = clib_socket_close (mif->sock);
139 memif_log_err (mif, "%U", format_clib_error, err);
140 clib_error_free (err);
142 clib_mem_free (mif->sock);
145 if (vlib_worker_thread_barrier_held () == 0)
148 vlib_worker_thread_barrier_sync (vm);
151 vec_foreach_index (i, mif->rx_queues)
153 mq = vec_elt_at_index (mif->rx_queues, i);
156 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
158 memif_disconnect_free_zc_queue_buffer(mq, 1);
163 vnet_hw_if_unregister_all_rx_queues (vnm, mif->hw_if_index);
165 vec_foreach_index (i, mif->tx_queues)
167 mq = vec_elt_at_index (mif->tx_queues, i);
170 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
172 memif_disconnect_free_zc_queue_buffer(mq, 0);
174 clib_spinlock_free (&mq->lockp);
178 vnet_hw_if_unregister_all_tx_queues (vnm, mif->hw_if_index);
179 vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
181 /* free tx and rx queues */
182 vec_foreach (mq, mif->rx_queues)
183 memif_queue_intfd_close (mq);
184 vec_free (mif->rx_queues);
186 vec_foreach (mq, mif->tx_queues)
187 memif_queue_intfd_close (mq);
188 vec_free (mif->tx_queues);
190 /* free memory regions */
191 vec_foreach (mr, mif->regions)
196 if ((rv = munmap (mr->shm, mr->region_size)))
197 memif_log_err (mif, "munmap failed, rv = %d", rv);
201 vec_free (mif->regions);
202 vec_free (mif->remote_name);
203 vec_free (mif->remote_if_name);
204 clib_fifo_free (mif->msg_queue);
207 vlib_worker_thread_barrier_release (vm);
210 static clib_error_t *
211 memif_int_fd_write_ready (clib_file_t * uf)
213 memif_main_t *mm = &memif_main;
214 u16 qid = uf->private_data & 0xFFFF;
215 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
217 memif_log_warn (mif, "unexpected EPOLLOUT on RX for queue %u", qid);
221 static clib_error_t *
222 memif_int_fd_read_ready (clib_file_t * uf)
224 memif_main_t *mm = &memif_main;
225 vnet_main_t *vnm = vnet_get_main ();
226 u16 qid = uf->private_data & 0xFFFF;
227 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
228 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
232 size = read (uf->file_descriptor, &b, sizeof (b));
235 memif_log_debug (mif, "Failed to read from socket");
239 vnet_hw_if_rx_queue_set_int_pending (vnm, mq->queue_index);
247 memif_connect (memif_if_t * mif)
249 memif_main_t *mm = &memif_main;
250 vlib_main_t *vm = vlib_get_main ();
251 vnet_main_t *vnm = vnet_get_main ();
252 clib_file_t template = { 0 };
255 u32 n_txqs = 0, n_threads = vlib_get_n_threads ();
256 clib_error_t *err = NULL;
257 u8 max_log2_ring_sz = 0;
258 int with_barrier = 0;
260 memif_log_debug (mif, "connect %u", mif->dev_instance);
262 vec_free (mif->local_disc_string);
263 vec_free (mif->remote_disc_string);
265 vec_foreach (mr, mif->regions)
272 err = clib_error_return (0, "no memory region fd");
276 if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
277 MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
279 err = clib_error_return_unix (0, "mmap");
284 template.read_function = memif_int_fd_read_ready;
285 template.write_function = memif_int_fd_write_ready;
288 if (vlib_worker_thread_barrier_held ())
292 vlib_worker_thread_barrier_sync (vm);
294 vec_foreach_index (i, mif->tx_queues)
296 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
297 max_log2_ring_sz = clib_max (max_log2_ring_sz, mq->log2_ring_size);
299 mq->ring = mif->regions[mq->region].shm + mq->offset;
300 if (mq->ring->cookie != MEMIF_COOKIE)
302 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
306 vnet_hw_if_register_tx_queue (vnm, mif->hw_if_index, i);
307 clib_spinlock_init (&mq->lockp);
309 if (mif->flags & MEMIF_IF_FLAG_USE_DMA)
311 memif_dma_info_t *dma_info;
314 mq->dma_info_head = 0;
315 mq->dma_info_tail = 0;
316 mq->dma_info_size = MEMIF_DMA_INFO_SIZE;
317 vec_validate_aligned (mq->dma_info, MEMIF_DMA_INFO_SIZE,
318 CLIB_CACHE_LINE_BYTES);
320 vec_foreach (dma_info, mq->dma_info)
322 vec_validate_aligned (dma_info->data.desc_data,
323 pow2_mask (max_log2_ring_sz),
324 CLIB_CACHE_LINE_BYTES);
325 vec_validate_aligned (dma_info->data.desc_len,
326 pow2_mask (max_log2_ring_sz),
327 CLIB_CACHE_LINE_BYTES);
328 vec_validate_aligned (dma_info->data.desc_status,
329 pow2_mask (max_log2_ring_sz),
330 CLIB_CACHE_LINE_BYTES);
331 vec_validate_aligned (dma_info->data.copy_ops, 0,
332 CLIB_CACHE_LINE_BYTES);
333 vec_reset_length (dma_info->data.copy_ops);
334 vec_validate_aligned (dma_info->data.buffers, 0,
335 CLIB_CACHE_LINE_BYTES);
336 vec_reset_length (dma_info->data.buffers);
341 if (vec_len (mif->tx_queues) > 0)
343 n_txqs = vec_len (mif->tx_queues);
344 for (j = 0; j < n_threads; j++)
346 u32 qi = mif->tx_queues[j % n_txqs].queue_index;
347 vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
351 vec_foreach_index (i, mif->rx_queues)
353 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
358 max_log2_ring_sz = clib_max (max_log2_ring_sz, mq->log2_ring_size);
360 mq->ring = mif->regions[mq->region].shm + mq->offset;
361 if (mq->ring->cookie != MEMIF_COOKIE)
363 err = clib_error_return (0, "wrong cookie on tx ring %u", i);
366 qi = vnet_hw_if_register_rx_queue (vnm, mif->hw_if_index, i,
367 VNET_HW_IF_RXQ_THREAD_ANY);
368 mq->queue_index = qi;
370 if (mif->flags & MEMIF_IF_FLAG_USE_DMA)
372 memif_dma_info_t *dma_info;
375 mq->dma_info_head = 0;
376 mq->dma_info_tail = 0;
377 mq->dma_info_size = MEMIF_DMA_INFO_SIZE;
378 vec_validate_aligned (mq->dma_info, MEMIF_DMA_INFO_SIZE,
379 CLIB_CACHE_LINE_BYTES);
380 vec_foreach (dma_info, mq->dma_info)
382 vec_validate_aligned (dma_info->data.desc_data,
383 pow2_mask (max_log2_ring_sz),
384 CLIB_CACHE_LINE_BYTES);
385 vec_validate_aligned (dma_info->data.desc_len,
386 pow2_mask (max_log2_ring_sz),
387 CLIB_CACHE_LINE_BYTES);
388 vec_validate_aligned (dma_info->data.desc_status,
389 pow2_mask (max_log2_ring_sz),
390 CLIB_CACHE_LINE_BYTES);
391 vec_validate_aligned (dma_info->data.copy_ops, 0,
392 CLIB_CACHE_LINE_BYTES);
393 vec_reset_length (dma_info->data.copy_ops);
394 vec_validate_aligned (dma_info->data.buffers, 0,
395 CLIB_CACHE_LINE_BYTES);
396 vec_reset_length (dma_info->data.buffers);
402 template.file_descriptor = mq->int_fd;
403 template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
404 template.description = format (0, "%U rx %u int",
405 format_memif_device_name,
406 mif->dev_instance, i);
407 memif_file_add (&mq->int_clib_file_index, &template);
408 vnet_hw_if_set_rx_queue_file_index (vnm, qi,
409 mq->int_clib_file_index);
411 ti = vnet_hw_if_get_rx_queue_thread_index (vnm, qi);
412 mq->buffer_pool_index = vlib_buffer_pool_get_default_for_numa (
413 vm, vlib_get_main_by_index (ti)->numa_node);
414 rv = vnet_hw_if_set_rx_queue_mode (vnm, qi, VNET_HW_IF_RX_MODE_DEFAULT);
415 vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
419 (mif, "Warning: unable to set rx mode for interface %d queue %d: "
420 "rc=%d", mif->hw_if_index, i, rv);
423 vnet_hw_if_rx_mode rxmode = vnet_hw_if_get_rx_queue_mode (vnm, qi);
425 if (rxmode == VNET_HW_IF_RX_MODE_POLLING)
426 mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
428 vnet_hw_if_rx_queue_set_int_pending (vnm, qi);
432 if (1 << max_log2_ring_sz > vec_len (mm->per_thread_data[0].desc_data))
434 memif_per_thread_data_t *ptd;
436 vec_foreach (ptd, mm->per_thread_data)
438 vec_validate_aligned (ptd->desc_data, pow2_mask (max_log2_ring_sz),
439 CLIB_CACHE_LINE_BYTES);
440 vec_validate_aligned (ptd->desc_len, pow2_mask (max_log2_ring_sz),
441 CLIB_CACHE_LINE_BYTES);
442 vec_validate_aligned (ptd->desc_status, pow2_mask (max_log2_ring_sz),
443 CLIB_CACHE_LINE_BYTES);
447 vlib_worker_thread_barrier_release (vm);
449 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
450 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
452 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
453 VNET_HW_INTERFACE_FLAG_LINK_UP);
458 vlib_worker_thread_barrier_release (vm);
459 memif_log_err (mif, "%U", format_clib_error, err);
463 static_always_inline memif_ring_t *
464 memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
466 if (vec_len (mif->regions) == 0)
468 void *p = mif->regions[0].shm;
470 sizeof (memif_ring_t) +
471 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
472 p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
474 return (memif_ring_t *) p;
478 memif_init_regions_and_queues (memif_if_t * mif)
480 vlib_main_t *vm = vlib_get_main ();
481 memif_socket_file_t *msf;
482 memif_ring_t *ring = NULL;
488 ASSERT (vec_len (mif->regions) == 0);
489 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
491 buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
492 (sizeof (memif_ring_t) +
493 sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
495 r->region_size = buffer_offset;
497 if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
498 r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
499 (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
501 if ((fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT, "%U region 0",
502 format_memif_device_name,
503 mif->dev_instance)) == -1)
505 err = clib_mem_get_last_error ();
509 if ((ftruncate (fd, r->region_size)) == -1)
511 err = clib_error_return_unix (0, "ftruncate");
515 msf = pool_elt_at_index (memif_main.socket_files, mif->socket_file_index);
516 r->shm = clib_mem_vm_map_shared (0, r->region_size, fd, 0, "memif%lu/%lu:0",
517 msf->socket_id, mif->id);
519 if (r->shm == CLIB_MEM_VM_MAP_FAILED)
521 err = clib_error_return_unix (0, "memif shared region map failed");
527 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
529 vlib_buffer_pool_t *bp;
530 vec_foreach (bp, vm->buffer_main->buffer_pools)
532 vlib_physmem_map_t *pm;
533 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
534 vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
536 r->region_size = pm->n_pages << pm->log2_page_size;
542 for (i = 0; i < mif->run.num_s2m_rings; i++)
544 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
545 ring->head = ring->tail = 0;
546 ring->cookie = MEMIF_COOKIE;
548 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
551 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
553 u16 slot = i * (1 << mif->run.log2_ring_size) + j;
554 ring->desc[j].region = 0;
555 ring->desc[j].offset =
556 buffer_offset + (u32) (slot * mif->run.buffer_size);
557 ring->desc[j].length = mif->run.buffer_size;
560 for (i = 0; i < mif->run.num_m2s_rings; i++)
562 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
563 ring->head = ring->tail = 0;
564 ring->cookie = MEMIF_COOKIE;
566 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
569 for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
572 (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
573 ring->desc[j].region = 0;
574 ring->desc[j].offset =
575 buffer_offset + (u32) (slot * mif->run.buffer_size);
576 ring->desc[j].length = mif->run.buffer_size;
580 ASSERT (mif->tx_queues == 0);
581 vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
582 CLIB_CACHE_LINE_BYTES);
584 vec_foreach_index (i, mif->tx_queues)
586 memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
587 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
589 err = clib_error_return_unix (0, "eventfd[tx queue %u]", i);
593 mq->int_clib_file_index = ~0;
594 mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
595 mq->log2_ring_size = mif->cfg.log2_ring_size;
597 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
599 mq->type = MEMIF_RING_S2M;
600 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
601 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
602 CLIB_CACHE_LINE_BYTES);
605 ASSERT (mif->rx_queues == 0);
606 vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
607 CLIB_CACHE_LINE_BYTES);
609 vec_foreach_index (i, mif->rx_queues)
611 memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
612 if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
614 err = clib_error_return_unix (0, "eventfd[rx queue %u]", i);
617 mq->int_clib_file_index = ~0;
618 mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
619 mq->log2_ring_size = mif->cfg.log2_ring_size;
621 mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
623 mq->type = MEMIF_RING_M2S;
624 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
625 vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
626 CLIB_CACHE_LINE_BYTES);
632 memif_log_err (mif, "%U", format_clib_error, err);
637 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
639 memif_main_t *mm = &memif_main;
642 uword *event_data = 0, event_type;
644 f64 start_time, last_run_duration = 0, now;
647 sock = clib_mem_alloc (sizeof (clib_socket_t));
648 clib_memset (sock, 0, sizeof (clib_socket_t));
653 vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
656 vlib_process_wait_for_event (vm);
658 event_type = vlib_process_get_events (vm, &event_data);
659 vec_reset_length (event_data);
665 case MEMIF_PROCESS_EVENT_START:
668 case MEMIF_PROCESS_EVENT_STOP:
671 case MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN:
677 last_run_duration = start_time = vlib_time_now (vm);
678 pool_foreach (mif, mm->interfaces)
680 memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
681 /* Allow no more than 10us without a pause */
682 now = vlib_time_now (vm);
683 if (now > start_time + 10e-6)
685 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
686 start_time = vlib_time_now (vm);
689 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
692 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
695 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
698 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
700 clib_memset (sock, 0, sizeof(clib_socket_t));
701 sock->config = (char *) msf->filename;
702 sock->is_seqpacket = 1;
703 sock->is_blocking = 1;
705 if ((err = clib_socket_init (sock)))
707 clib_error_free (err);
711 clib_file_t t = { 0 };
713 t.read_function = memif_slave_conn_fd_read_ready;
714 t.write_function = memif_slave_conn_fd_write_ready;
715 t.error_function = memif_slave_conn_fd_error;
716 t.file_descriptor = sock->fd;
717 t.private_data = mif->dev_instance;
718 memif_file_add (&sock->private_data, &t);
719 t.description = format (0, "%U ctl",
720 format_memif_device_name,
722 hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
724 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
726 sock = clib_mem_alloc (sizeof(clib_socket_t));
730 last_run_duration = vlib_time_now (vm) - last_run_duration;
735 VLIB_REGISTER_NODE (memif_process_node,static) = {
736 .function = memif_process,
737 .type = VLIB_NODE_TYPE_PROCESS,
738 .name = "memif-process",
742 * Returns an unused socket id, and ~0 if it can't find one.
745 memif_get_unused_socket_id ()
747 memif_main_t *mm = &memif_main;
752 /* limit to 1M tries */
753 for (j = 0; j < 1 << 10; j++)
755 seed = random_u32 (&seed);
756 for (i = 0; i < 1 << 10; i++)
758 /* look around randomly generated id */
759 seed += (2 * (i % 2) - 1) * i;
760 if (seed == (u32) ~0)
762 p = hash_get (mm->socket_file_index_by_sock_id, seed);
772 memif_socket_filename_add_del (u8 is_add, u32 sock_id, char *sock_filename)
774 memif_main_t *mm = &memif_main;
776 memif_socket_file_t *msf;
777 clib_error_t *err = 0;
782 /* allow adding socket id 0 */
783 if (sock_id == 0 && is_add == 0)
784 return vnet_error (VNET_ERR_INVALID_ARGUMENT, "cannot delete socket id 0");
787 return vnet_error (VNET_ERR_INVALID_ARGUMENT,
788 "socked id is not specified");
792 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
794 /* Don't delete non-existent entries. */
795 return vnet_error (VNET_ERR_INVALID_ARGUMENT,
796 "socket file with id %u does not exist", sock_id);
798 msf = pool_elt_at_index (mm->socket_files, *p);
799 if (msf->ref_cnt > 0)
800 return vnet_error (VNET_ERR_UNEXPECTED_INTF_STATE,
801 "socket file '%s' is in use", msf->filename);
803 vec_free (msf->filename);
804 pool_put (mm->socket_files, msf);
806 hash_unset (mm->socket_file_index_by_sock_id, sock_id);
811 if (sock_filename == 0 || sock_filename[0] == 0)
812 return vnet_error (VNET_ERR_INVALID_ARGUMENT,
813 "socket filename not specified");
815 if (clib_socket_prefix_is_valid (sock_filename))
817 name = format (0, "%s%c", sock_filename, 0);
819 else if (sock_filename[0] == '/')
821 name = format (0, "%s%c", sock_filename, 0);
825 /* copy runtime dir path */
826 vec_add (dir, vlib_unix_get_runtime_dir (),
827 strlen (vlib_unix_get_runtime_dir ()));
830 /* if sock_filename contains dirs, add them to path */
831 tmp = strrchr (sock_filename, '/');
834 idx = tmp - sock_filename;
835 vec_add (dir, sock_filename, idx);
838 vec_add1 (dir, '\0');
839 /* create socket dir */
840 if ((err = vlib_unix_recursive_mkdir (dir)))
842 clib_error_free (err);
843 err = vnet_error (VNET_ERR_SYSCALL_ERROR_1,
844 "unable to create socket dir");
849 format (0, "%s/%s%c", vlib_unix_get_runtime_dir (), sock_filename, 0);
852 p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
855 msf = pool_elt_at_index (mm->socket_files, *p);
856 if (strcmp ((char *) msf->filename, (char *) name) == 0)
858 /* Silently accept identical "add". */
862 /* But don't allow a direct add of a different filename. */
863 err = vnet_error (VNET_ERR_ENTRY_ALREADY_EXISTS, "entry already exists");
867 pool_get (mm->socket_files, msf);
868 clib_memset (msf, 0, sizeof (memif_socket_file_t));
870 msf->filename = name;
871 msf->socket_id = sock_id;
874 hash_set (mm->socket_file_index_by_sock_id, sock_id, msf - mm->socket_files);
883 memif_delete_if (vlib_main_t *vm, memif_if_t *mif)
885 vnet_main_t *vnm = vnet_get_main ();
886 memif_main_t *mm = &memif_main;
887 memif_socket_file_t *msf =
888 vec_elt_at_index (mm->socket_files, mif->socket_file_index);
891 mif->flags |= MEMIF_IF_FLAG_DELETING;
892 vec_free (mif->local_disc_string);
893 vec_free (mif->remote_disc_string);
895 /* bring down the interface */
896 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
897 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
899 err = clib_error_return (0, "interface deleted");
900 memif_disconnect (mif, err);
901 clib_error_free (err);
903 if (mif->hw_if_index != ~0)
905 /* remove the interface */
906 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
907 vnet_delete_hw_interface (vnm, mif->hw_if_index);
909 ethernet_delete_interface (vnm, mif->hw_if_index);
910 mif->hw_if_index = ~0;
913 /* free interface data structures */
914 mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
916 /* remove socket file */
917 if (--(msf->ref_cnt) == 0)
919 if (msf->is_listener)
922 vec_foreach_index (i, msf->pending_clients)
923 memif_socket_close (msf->pending_clients + i);
924 memif_socket_close (&msf->sock);
925 vec_free (msf->pending_clients);
927 mhash_free (&msf->dev_instance_by_id);
928 hash_free (msf->dev_instance_by_fd);
931 err = clib_socket_close (msf->sock);
934 memif_log_err (mif, "%U", format_clib_error, err);
935 clib_error_free (err);
937 clib_mem_free (msf->sock);
941 vec_free (mif->local_disc_string);
942 clib_memset (mif, 0, sizeof (*mif));
943 pool_put (mm->interfaces, mif);
945 if (pool_elts (mm->interfaces) == 0)
946 vlib_process_signal_event (vm, memif_process_node.index,
947 MEMIF_PROCESS_EVENT_STOP, 0);
952 VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) = {
954 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
955 .tx_hash_fn_type = VNET_HASH_FN_TYPE_IP,
959 memif_prepare_dma_args (vlib_dma_config_t *args)
961 args->max_batches = 256;
962 args->max_transfer_size = VLIB_BUFFER_DEFAULT_DATA_SIZE;
963 args->barrier_before_last = 1;
964 args->sw_fallback = 1;
965 args->callback_fn = NULL;
969 memif_create_if (vlib_main_t *vm, memif_create_if_args_t *args)
971 memif_main_t *mm = &memif_main;
972 vlib_thread_main_t *tm = vlib_get_thread_main ();
973 vnet_main_t *vnm = vnet_get_main ();
974 vnet_eth_interface_registration_t eir = {};
976 vnet_sw_interface_t *sw;
978 memif_socket_file_t *msf = 0;
979 clib_error_t *err = 0;
981 p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
984 err = vnet_error (VNET_ERR_INVALID_ARGUMENT, "unknown socket id");
988 msf = vec_elt_at_index (mm->socket_files, p[0]);
990 /* existing socket file can be either master or slave but cannot be both */
991 if (msf->ref_cnt > 0)
993 if ((!msf->is_listener != !args->is_master))
996 vnet_error (VNET_ERR_SUBIF_ALREADY_EXISTS,
997 "socket file cannot be used by both master and slave");
1001 p = mhash_get (&msf->dev_instance_by_id, &args->id);
1004 err = vnet_error (VNET_ERR_SUBIF_ALREADY_EXISTS,
1005 "interface already exists");
1010 /* Create new socket file */
1011 if (msf->ref_cnt == 0)
1013 mhash_init (&msf->dev_instance_by_id, sizeof (uword),
1014 sizeof (memif_interface_id_t));
1015 msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
1016 msf->is_listener = (args->is_master != 0);
1018 memif_log_debug (0, "initializing socket file %s", msf->filename);
1021 if (mm->per_thread_data == 0)
1025 vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
1026 CLIB_CACHE_LINE_BYTES);
1028 for (i = 0; i < tm->n_vlib_mains; i++)
1030 memif_per_thread_data_t *ptd =
1031 vec_elt_at_index (mm->per_thread_data, i);
1032 vlib_buffer_t *bt = &ptd->buffer_template;
1033 clib_memset (bt, 0, sizeof (vlib_buffer_t));
1034 bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
1035 bt->total_length_not_including_first_buffer = 0;
1036 vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1038 vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
1039 vec_reset_length (ptd->copy_ops);
1040 vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
1041 vec_reset_length (ptd->buffers);
1045 pool_get (mm->interfaces, mif);
1046 clib_memset (mif, 0, sizeof (*mif));
1047 mif->dev_instance = mif - mm->interfaces;
1048 mif->socket_file_index = msf - mm->socket_files;
1050 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
1051 mif->mode = args->mode;
1053 mif->secret = vec_dup (args->secret);
1055 /* register dma config if enabled */
1058 vlib_dma_config_t dma_args;
1059 bzero (&dma_args, sizeof (dma_args));
1060 memif_prepare_dma_args (&dma_args);
1062 dma_args.max_transfers = 1 << args->log2_ring_size;
1063 dma_args.callback_fn = memif_dma_completion_cb;
1064 mif->dma_input_config = vlib_dma_config_add (vm, &dma_args);
1065 dma_args.callback_fn = memif_tx_dma_completion_cb;
1066 mif->dma_tx_config = vlib_dma_config_add (vm, &dma_args);
1069 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
1072 if (!args->hw_addr_set)
1074 f64 now = vlib_time_now (vm);
1076 rnd = (u32) (now * 1e6);
1077 rnd = random_u32 (&rnd);
1079 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
1080 args->hw_addr[0] = 2;
1081 args->hw_addr[1] = 0xfe;
1084 eir.dev_class_index = memif_device_class.index;
1085 eir.dev_instance = mif->dev_instance;
1086 eir.address = args->hw_addr;
1087 eir.cb.flag_change = memif_eth_flag_change;
1088 eir.cb.set_max_frame_size = memif_eth_set_max_frame_size;
1089 mif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
1091 else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1094 vnet_register_interface (vnm, memif_device_class.index,
1096 memif_ip_hw_if_class.index,
1102 vnet_error (VNET_ERR_SYSCALL_ERROR_2, "unsupported interface mode");
1106 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
1107 mif->sw_if_index = sw->sw_if_index;
1109 mif->cfg.log2_ring_size = args->log2_ring_size;
1110 mif->cfg.buffer_size = args->buffer_size;
1111 mif->cfg.num_s2m_rings =
1112 args->is_master ? args->rx_queues : args->tx_queues;
1113 mif->cfg.num_m2s_rings =
1114 args->is_master ? args->tx_queues : args->rx_queues;
1116 args->sw_if_index = mif->sw_if_index;
1118 /* If this is new one, start listening */
1119 if (msf->is_listener && msf->ref_cnt == 0)
1121 clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
1123 ASSERT (msf->sock == 0);
1126 clib_memset (s, 0, sizeof (clib_socket_t));
1127 s->config = (char *) msf->filename;
1130 s->allow_group_write = 1;
1131 s->is_seqpacket = 1;
1134 if ((err = clib_socket_init (s)))
1136 err->code = VNET_ERR_SYSCALL_ERROR_4;
1140 clib_file_t template = { 0 };
1141 template.read_function = memif_conn_fd_accept_ready;
1142 template.file_descriptor = msf->sock->fd;
1143 template.private_data = mif->socket_file_index;
1144 template.description = format (0, "memif listener %s", msf->filename);
1145 memif_file_add (&msf->sock->private_data, &template);
1150 if (args->is_master == 0)
1152 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
1153 if (args->is_zero_copy)
1154 mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
1158 mif->flags |= MEMIF_IF_FLAG_USE_DMA;
1160 vnet_hw_if_set_caps (vnm, mif->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
1161 vnet_hw_if_set_input_node (vnm, mif->hw_if_index, memif_input_node.index);
1162 mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
1164 if (pool_elts (mm->interfaces) == 1)
1166 vlib_process_signal_event (vm, memif_process_node.index,
1167 MEMIF_PROCESS_EVENT_START, 0);
1172 memif_delete_if (vm, mif);
1174 memif_log_err (mif, "%U", format_clib_error, err);
1182 memif_interface_admin_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
1184 memif_main_t *mm = &memif_main;
1185 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1186 memif_if_t *mif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
1187 static clib_error_t *error = 0;
1189 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1191 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
1193 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
1194 VNET_HW_INTERFACE_FLAG_LINK_UP);
1196 mif->flags |= MEMIF_IF_FLAG_ADMIN_UP;
1199 mif->flags &= ~MEMIF_IF_FLAG_ADMIN_UP;
1201 vlib_process_signal_event (vnm->vlib_main, memif_process_node.index,
1202 MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN, 0);
1206 static clib_error_t *
1207 memif_init (vlib_main_t * vm)
1209 memif_main_t *mm = &memif_main;
1211 clib_memset (mm, 0, sizeof (memif_main_t));
1213 mm->log_class = vlib_log_register_class ("memif_plugin", 0);
1214 memif_log_debug (0, "initialized");
1216 /* initialize binary API */
1217 memif_plugin_api_hookup (vm);
1220 * Pre-stuff socket filename pool with a non-modifieable mapping
1221 * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
1222 * default run-time directory.
1224 return memif_socket_filename_add_del (1, 0, MEMIF_DEFAULT_SOCKET_FILENAME);
1227 VLIB_INIT_FUNCTION (memif_init);
1229 VLIB_PLUGIN_REGISTER () = {
1230 .version = VPP_BUILD_VER,
1231 .description = "Packet Memory Interface (memif) -- Experimental",
1235 * fd.io coding-style-patch-verification: ON
1238 * eval: (c-set-style "gnu")