Line data Source code
1 : /*
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:
7 : *
8 : * http://www.apache.org/licenses/LICENSE-2.0
9 : *
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 : *------------------------------------------------------------------
16 : */
17 :
18 :
19 : #define _GNU_SOURCE
20 : #include <stdint.h>
21 : #include <net/if.h>
22 : #include <sys/types.h>
23 : #include <fcntl.h>
24 : #include <sys/ioctl.h>
25 : #include <sys/socket.h>
26 : #include <sys/un.h>
27 : #include <sys/uio.h>
28 : #include <sys/mman.h>
29 : #include <sys/prctl.h>
30 : #include <sys/eventfd.h>
31 : #include <inttypes.h>
32 : #include <limits.h>
33 :
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>
43 :
44 : memif_main_t memif_main;
45 :
46 : static u32
47 6 : memif_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
48 : {
49 : /* nothing for now */
50 6 : return 0;
51 : }
52 :
53 : static clib_error_t *
54 0 : memif_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
55 : u32 flags)
56 : {
57 : /* nothing for now */
58 0 : return 0;
59 : }
60 :
61 : static void
62 16 : memif_queue_intfd_close (memif_queue_t * mq)
63 : {
64 16 : if (mq->int_clib_file_index != ~0)
65 : {
66 8 : memif_file_del_by_index (mq->int_clib_file_index);
67 8 : mq->int_clib_file_index = ~0;
68 8 : mq->int_fd = -1;
69 : }
70 8 : else if (mq->int_fd > -1)
71 : {
72 8 : close (mq->int_fd);
73 8 : mq->int_fd = -1;
74 : }
75 16 : }
76 :
77 : static void
78 8 : memif_disconnect_free_zc_queue_buffer (memif_queue_t * mq, u8 is_rx)
79 : {
80 8 : vlib_main_t *vm = vlib_get_main ();
81 : u16 ring_size, n_slots, mask, start;
82 :
83 8 : ring_size = 1 << mq->log2_ring_size;
84 8 : mask = ring_size - 1;
85 8 : n_slots = mq->ring->head - mq->last_tail;
86 8 : start = mq->last_tail & mask;
87 8 : if (is_rx)
88 4 : vlib_buffer_free_from_ring (vm, mq->buffers, start, ring_size, n_slots);
89 : else
90 4 : vlib_buffer_free_from_ring_no_next (vm, mq->buffers, start, ring_size,
91 : n_slots);
92 8 : vec_free (mq->buffers);
93 8 : }
94 :
95 : void
96 20 : memif_disconnect (memif_if_t * mif, clib_error_t * err)
97 : {
98 20 : memif_main_t *mm = &memif_main;
99 20 : vnet_main_t *vnm = vnet_get_main ();
100 : memif_region_t *mr;
101 : memif_queue_t *mq;
102 : int i;
103 20 : vlib_main_t *vm = vlib_get_main ();
104 20 : int with_barrier = 0;
105 :
106 20 : if (mif == 0)
107 0 : return;
108 :
109 20 : memif_log_debug (mif, "disconnect %u (%v)", mif->dev_instance,
110 : err ? err->what : 0);
111 :
112 20 : if (err)
113 : {
114 20 : clib_error_t *e = 0;
115 20 : mif->local_disc_string = vec_dup (err->what);
116 20 : if (mif->sock && clib_socket_is_connected (mif->sock))
117 8 : e = memif_msg_send_disconnect (mif, err);
118 20 : clib_error_free (e);
119 : }
120 :
121 : /* set interface down */
122 20 : mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
123 20 : if (mif->hw_if_index != ~0)
124 20 : vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
125 :
126 : /* close connection socket */
127 20 : if (mif->sock && mif->sock->fd)
128 8 : {
129 8 : memif_socket_file_t *msf = vec_elt_at_index (mm->socket_files,
130 : mif->socket_file_index);
131 8 : hash_unset (msf->dev_instance_by_fd, mif->sock->fd);
132 8 : memif_socket_close (&mif->sock);
133 : }
134 12 : else if (mif->sock)
135 : {
136 : clib_error_t *err;
137 0 : err = clib_socket_close (mif->sock);
138 0 : if (err)
139 : {
140 0 : memif_log_err (mif, "%U", format_clib_error, err);
141 0 : clib_error_free (err);
142 : }
143 0 : clib_mem_free (mif->sock);
144 : }
145 :
146 20 : if (vlib_worker_thread_barrier_held () == 0)
147 : {
148 0 : with_barrier = 1;
149 0 : vlib_worker_thread_barrier_sync (vm);
150 : }
151 :
152 : /* *INDENT-OFF* */
153 28 : vec_foreach_index (i, mif->rx_queues)
154 : {
155 8 : mq = vec_elt_at_index (mif->rx_queues, i);
156 8 : if (mq->ring)
157 : {
158 8 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
159 : {
160 4 : memif_disconnect_free_zc_queue_buffer(mq, 1);
161 : }
162 8 : mq->ring = 0;
163 : }
164 : }
165 20 : vnet_hw_if_unregister_all_rx_queues (vnm, mif->hw_if_index);
166 :
167 : /* *INDENT-OFF* */
168 28 : vec_foreach_index (i, mif->tx_queues)
169 : {
170 8 : mq = vec_elt_at_index (mif->tx_queues, i);
171 8 : if (mq->ring)
172 : {
173 8 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
174 : {
175 4 : memif_disconnect_free_zc_queue_buffer(mq, 0);
176 : }
177 8 : clib_spinlock_free (&mq->lockp);
178 : }
179 8 : mq->ring = 0;
180 : }
181 20 : vnet_hw_if_unregister_all_tx_queues (vnm, mif->hw_if_index);
182 20 : vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
183 :
184 : /* free tx and rx queues */
185 28 : vec_foreach (mq, mif->rx_queues)
186 8 : memif_queue_intfd_close (mq);
187 20 : vec_free (mif->rx_queues);
188 :
189 28 : vec_foreach (mq, mif->tx_queues)
190 8 : memif_queue_intfd_close (mq);
191 20 : vec_free (mif->tx_queues);
192 :
193 : /* free memory regions */
194 36 : vec_foreach (mr, mif->regions)
195 : {
196 : int rv;
197 16 : if (mr->is_external)
198 4 : continue;
199 12 : if ((rv = munmap (mr->shm, mr->region_size)))
200 0 : memif_log_err (mif, "munmap failed, rv = %d", rv);
201 12 : if (mr->fd > -1)
202 12 : close (mr->fd);
203 : }
204 : /* *INDENT-ON* */
205 20 : vec_free (mif->regions);
206 20 : vec_free (mif->remote_name);
207 20 : vec_free (mif->remote_if_name);
208 20 : clib_fifo_free (mif->msg_queue);
209 :
210 20 : if (with_barrier)
211 0 : vlib_worker_thread_barrier_release (vm);
212 : }
213 :
214 : static clib_error_t *
215 0 : memif_int_fd_write_ready (clib_file_t * uf)
216 : {
217 0 : memif_main_t *mm = &memif_main;
218 0 : u16 qid = uf->private_data & 0xFFFF;
219 0 : memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
220 :
221 0 : memif_log_warn (mif, "unexpected EPOLLOUT on RX for queue %u", qid);
222 0 : return 0;
223 : }
224 :
225 : static clib_error_t *
226 0 : memif_int_fd_read_ready (clib_file_t * uf)
227 : {
228 0 : memif_main_t *mm = &memif_main;
229 0 : vnet_main_t *vnm = vnet_get_main ();
230 0 : u16 qid = uf->private_data & 0xFFFF;
231 0 : memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 16);
232 0 : memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
233 : u64 b;
234 : ssize_t size;
235 :
236 0 : size = read (uf->file_descriptor, &b, sizeof (b));
237 0 : if (size < 0)
238 : {
239 0 : memif_log_debug (mif, "Failed to read from socket");
240 0 : return 0;
241 : }
242 :
243 0 : vnet_hw_if_rx_queue_set_int_pending (vnm, mq->queue_index);
244 0 : mq->int_count++;
245 :
246 0 : return 0;
247 : }
248 :
249 :
250 : clib_error_t *
251 14 : memif_connect (memif_if_t * mif)
252 : {
253 14 : memif_main_t *mm = &memif_main;
254 14 : vlib_main_t *vm = vlib_get_main ();
255 14 : vnet_main_t *vnm = vnet_get_main ();
256 14 : clib_file_t template = { 0 };
257 : memif_region_t *mr;
258 : int i, j;
259 14 : u32 n_txqs = 0, n_threads = vlib_get_n_threads ();
260 14 : clib_error_t *err = NULL;
261 14 : u8 max_log2_ring_sz = 0;
262 14 : int with_barrier = 0;
263 :
264 14 : memif_log_debug (mif, "connect %u", mif->dev_instance);
265 :
266 14 : vec_free (mif->local_disc_string);
267 14 : vec_free (mif->remote_disc_string);
268 :
269 : /* *INDENT-OFF* */
270 42 : vec_foreach (mr, mif->regions)
271 : {
272 28 : if (mr->shm)
273 14 : continue;
274 :
275 14 : if (mr->fd < 0)
276 : {
277 0 : err = clib_error_return (0, "no memory region fd");
278 0 : goto error;
279 : }
280 :
281 14 : if ((mr->shm = mmap (NULL, mr->region_size, PROT_READ | PROT_WRITE,
282 : MAP_SHARED, mr->fd, 0)) == MAP_FAILED)
283 : {
284 0 : err = clib_error_return_unix (0, "mmap");
285 0 : goto error;
286 : }
287 : }
288 : /* *INDENT-ON* */
289 :
290 14 : template.read_function = memif_int_fd_read_ready;
291 14 : template.write_function = memif_int_fd_write_ready;
292 :
293 14 : with_barrier = 1;
294 14 : if (vlib_worker_thread_barrier_held ())
295 14 : with_barrier = 0;
296 :
297 14 : if (with_barrier)
298 0 : vlib_worker_thread_barrier_sync (vm);
299 :
300 : /* *INDENT-OFF* */
301 28 : vec_foreach_index (i, mif->tx_queues)
302 : {
303 14 : memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
304 14 : max_log2_ring_sz = clib_max (max_log2_ring_sz, mq->log2_ring_size);
305 :
306 14 : mq->ring = mif->regions[mq->region].shm + mq->offset;
307 14 : if (mq->ring->cookie != MEMIF_COOKIE)
308 : {
309 0 : err = clib_error_return (0, "wrong cookie on tx ring %u", i);
310 0 : goto error;
311 : }
312 14 : mq->queue_index =
313 14 : vnet_hw_if_register_tx_queue (vnm, mif->hw_if_index, i);
314 14 : clib_spinlock_init (&mq->lockp);
315 :
316 14 : if (mif->flags & MEMIF_IF_FLAG_USE_DMA)
317 : {
318 : memif_dma_info_t *dma_info;
319 0 : mq->dma_head = 0;
320 0 : mq->dma_tail = 0;
321 0 : mq->dma_info_head = 0;
322 0 : mq->dma_info_tail = 0;
323 0 : mq->dma_info_size = MEMIF_DMA_INFO_SIZE;
324 0 : vec_validate_aligned (mq->dma_info, MEMIF_DMA_INFO_SIZE,
325 : CLIB_CACHE_LINE_BYTES);
326 :
327 0 : vec_foreach (dma_info, mq->dma_info)
328 : {
329 0 : vec_validate_aligned (dma_info->data.desc_data,
330 : pow2_mask (max_log2_ring_sz),
331 : CLIB_CACHE_LINE_BYTES);
332 0 : vec_validate_aligned (dma_info->data.desc_len,
333 : pow2_mask (max_log2_ring_sz),
334 : CLIB_CACHE_LINE_BYTES);
335 0 : vec_validate_aligned (dma_info->data.desc_status,
336 : pow2_mask (max_log2_ring_sz),
337 : CLIB_CACHE_LINE_BYTES);
338 0 : vec_validate_aligned (dma_info->data.copy_ops, 0,
339 : CLIB_CACHE_LINE_BYTES);
340 0 : vec_reset_length (dma_info->data.copy_ops);
341 0 : vec_validate_aligned (dma_info->data.buffers, 0,
342 : CLIB_CACHE_LINE_BYTES);
343 0 : vec_reset_length (dma_info->data.buffers);
344 : }
345 : }
346 : }
347 :
348 14 : if (vec_len (mif->tx_queues) > 0)
349 : {
350 14 : n_txqs = vec_len (mif->tx_queues);
351 28 : for (j = 0; j < n_threads; j++)
352 : {
353 14 : u32 qi = mif->tx_queues[j % n_txqs].queue_index;
354 14 : vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
355 : }
356 : }
357 :
358 28 : vec_foreach_index (i, mif->rx_queues)
359 : {
360 14 : memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
361 : u32 ti;
362 : u32 qi;
363 : int rv;
364 :
365 14 : max_log2_ring_sz = clib_max (max_log2_ring_sz, mq->log2_ring_size);
366 :
367 14 : mq->ring = mif->regions[mq->region].shm + mq->offset;
368 14 : if (mq->ring->cookie != MEMIF_COOKIE)
369 : {
370 0 : err = clib_error_return (0, "wrong cookie on tx ring %u", i);
371 0 : goto error;
372 : }
373 14 : qi = vnet_hw_if_register_rx_queue (vnm, mif->hw_if_index, i,
374 : VNET_HW_IF_RXQ_THREAD_ANY);
375 14 : mq->queue_index = qi;
376 :
377 14 : if (mif->flags & MEMIF_IF_FLAG_USE_DMA)
378 : {
379 : memif_dma_info_t *dma_info;
380 0 : mq->dma_head = 0;
381 0 : mq->dma_tail = 0;
382 0 : mq->dma_info_head = 0;
383 0 : mq->dma_info_tail = 0;
384 0 : mq->dma_info_size = MEMIF_DMA_INFO_SIZE;
385 0 : vec_validate_aligned (mq->dma_info, MEMIF_DMA_INFO_SIZE,
386 : CLIB_CACHE_LINE_BYTES);
387 0 : vec_foreach (dma_info, mq->dma_info)
388 : {
389 0 : vec_validate_aligned (dma_info->data.desc_data,
390 : pow2_mask (max_log2_ring_sz),
391 : CLIB_CACHE_LINE_BYTES);
392 0 : vec_validate_aligned (dma_info->data.desc_len,
393 : pow2_mask (max_log2_ring_sz),
394 : CLIB_CACHE_LINE_BYTES);
395 0 : vec_validate_aligned (dma_info->data.desc_status,
396 : pow2_mask (max_log2_ring_sz),
397 : CLIB_CACHE_LINE_BYTES);
398 0 : vec_validate_aligned (dma_info->data.copy_ops, 0,
399 : CLIB_CACHE_LINE_BYTES);
400 0 : vec_reset_length (dma_info->data.copy_ops);
401 0 : vec_validate_aligned (dma_info->data.buffers, 0,
402 : CLIB_CACHE_LINE_BYTES);
403 0 : vec_reset_length (dma_info->data.buffers);
404 : }
405 : }
406 :
407 14 : if (mq->int_fd > -1)
408 : {
409 14 : template.file_descriptor = mq->int_fd;
410 14 : template.private_data = (mif->dev_instance << 16) | (i & 0xFFFF);
411 14 : template.description = format (0, "%U rx %u int",
412 : format_memif_device_name,
413 : mif->dev_instance, i);
414 14 : memif_file_add (&mq->int_clib_file_index, &template);
415 14 : vnet_hw_if_set_rx_queue_file_index (vnm, qi,
416 14 : mq->int_clib_file_index);
417 : }
418 14 : ti = vnet_hw_if_get_rx_queue_thread_index (vnm, qi);
419 14 : mq->buffer_pool_index = vlib_buffer_pool_get_default_for_numa (
420 14 : vm, vlib_get_main_by_index (ti)->numa_node);
421 14 : rv = vnet_hw_if_set_rx_queue_mode (vnm, qi, VNET_HW_IF_RX_MODE_DEFAULT);
422 14 : vnet_hw_if_update_runtime_data (vnm, mif->hw_if_index);
423 :
424 14 : if (rv)
425 0 : memif_log_err
426 : (mif, "Warning: unable to set rx mode for interface %d queue %d: "
427 : "rc=%d", mif->hw_if_index, i, rv);
428 : else
429 : {
430 14 : vnet_hw_if_rx_mode rxmode = vnet_hw_if_get_rx_queue_mode (vnm, qi);
431 :
432 14 : if (rxmode == VNET_HW_IF_RX_MODE_POLLING)
433 14 : mq->ring->flags |= MEMIF_RING_FLAG_MASK_INT;
434 : else
435 0 : vnet_hw_if_rx_queue_set_int_pending (vnm, qi);
436 : }
437 : }
438 : /* *INDENT-ON* */
439 :
440 14 : if (1 << max_log2_ring_sz > vec_len (mm->per_thread_data[0].desc_data))
441 : {
442 : memif_per_thread_data_t *ptd;
443 :
444 8 : vec_foreach (ptd, mm->per_thread_data)
445 : {
446 4 : vec_validate_aligned (ptd->desc_data, pow2_mask (max_log2_ring_sz),
447 : CLIB_CACHE_LINE_BYTES);
448 4 : vec_validate_aligned (ptd->desc_len, pow2_mask (max_log2_ring_sz),
449 : CLIB_CACHE_LINE_BYTES);
450 4 : vec_validate_aligned (ptd->desc_status, pow2_mask (max_log2_ring_sz),
451 : CLIB_CACHE_LINE_BYTES);
452 : }
453 : }
454 14 : if (with_barrier)
455 0 : vlib_worker_thread_barrier_release (vm);
456 :
457 14 : mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
458 14 : mif->flags |= MEMIF_IF_FLAG_CONNECTED;
459 :
460 14 : vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
461 : VNET_HW_INTERFACE_FLAG_LINK_UP);
462 14 : return 0;
463 :
464 0 : error:
465 0 : if (with_barrier)
466 0 : vlib_worker_thread_barrier_release (vm);
467 0 : memif_log_err (mif, "%U", format_clib_error, err);
468 0 : return err;
469 : }
470 :
471 : static_always_inline memif_ring_t *
472 28 : memif_get_ring (memif_if_t * mif, memif_ring_type_t type, u16 ring_num)
473 : {
474 28 : if (vec_len (mif->regions) == 0)
475 0 : return NULL;
476 28 : void *p = mif->regions[0].shm;
477 28 : int ring_size =
478 28 : sizeof (memif_ring_t) +
479 28 : sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size);
480 28 : p += (ring_num + type * mif->run.num_s2m_rings) * ring_size;
481 :
482 28 : return (memif_ring_t *) p;
483 : }
484 :
485 : clib_error_t *
486 7 : memif_init_regions_and_queues (memif_if_t * mif)
487 : {
488 7 : vlib_main_t *vm = vlib_get_main ();
489 : memif_socket_file_t *msf;
490 7 : memif_ring_t *ring = NULL;
491 : int fd, i, j;
492 : u64 buffer_offset;
493 : memif_region_t *r;
494 : clib_error_t *err;
495 :
496 7 : ASSERT (vec_len (mif->regions) == 0);
497 7 : vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
498 :
499 7 : buffer_offset = (mif->run.num_s2m_rings + mif->run.num_m2s_rings) *
500 7 : (sizeof (memif_ring_t) +
501 7 : sizeof (memif_desc_t) * (1 << mif->run.log2_ring_size));
502 :
503 7 : r->region_size = buffer_offset;
504 :
505 7 : if ((mif->flags & MEMIF_IF_FLAG_ZERO_COPY) == 0)
506 0 : r->region_size += mif->run.buffer_size * (1 << mif->run.log2_ring_size) *
507 0 : (mif->run.num_s2m_rings + mif->run.num_m2s_rings);
508 :
509 7 : if ((fd = clib_mem_vm_create_fd (CLIB_MEM_PAGE_SZ_DEFAULT, "%U region 0",
510 : format_memif_device_name,
511 : mif->dev_instance)) == -1)
512 : {
513 0 : err = clib_mem_get_last_error ();
514 0 : goto error;
515 : }
516 :
517 7 : if ((ftruncate (fd, r->region_size)) == -1)
518 : {
519 0 : err = clib_error_return_unix (0, "ftruncate");
520 0 : goto error;
521 : }
522 :
523 7 : msf = pool_elt_at_index (memif_main.socket_files, mif->socket_file_index);
524 7 : r->shm = clib_mem_vm_map_shared (0, r->region_size, fd, 0, "memif%lu/%lu:0",
525 : msf->socket_id, mif->id);
526 :
527 7 : if (r->shm == CLIB_MEM_VM_MAP_FAILED)
528 : {
529 0 : err = clib_error_return_unix (0, "memif shared region map failed");
530 0 : goto error;
531 : }
532 :
533 7 : r->fd = fd;
534 :
535 7 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
536 : {
537 : vlib_buffer_pool_t *bp;
538 : /* *INDENT-OFF* */
539 14 : vec_foreach (bp, vm->buffer_main->buffer_pools)
540 : {
541 : vlib_physmem_map_t *pm;
542 7 : pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
543 7 : vec_add2_aligned (mif->regions, r, 1, CLIB_CACHE_LINE_BYTES);
544 7 : r->fd = pm->fd;
545 7 : r->region_size = pm->n_pages << pm->log2_page_size;
546 7 : r->shm = pm->base;
547 7 : r->is_external = 1;
548 : }
549 : /* *INDENT-ON* */
550 : }
551 :
552 14 : for (i = 0; i < mif->run.num_s2m_rings; i++)
553 : {
554 7 : ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
555 7 : ring->head = ring->tail = 0;
556 7 : ring->cookie = MEMIF_COOKIE;
557 :
558 7 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
559 7 : continue;
560 :
561 0 : for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
562 : {
563 0 : u16 slot = i * (1 << mif->run.log2_ring_size) + j;
564 0 : ring->desc[j].region = 0;
565 0 : ring->desc[j].offset =
566 0 : buffer_offset + (u32) (slot * mif->run.buffer_size);
567 0 : ring->desc[j].length = mif->run.buffer_size;
568 : }
569 : }
570 14 : for (i = 0; i < mif->run.num_m2s_rings; i++)
571 : {
572 7 : ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
573 7 : ring->head = ring->tail = 0;
574 7 : ring->cookie = MEMIF_COOKIE;
575 :
576 7 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
577 7 : continue;
578 :
579 0 : for (j = 0; j < (1 << mif->run.log2_ring_size); j++)
580 : {
581 0 : u16 slot =
582 0 : (i + mif->run.num_s2m_rings) * (1 << mif->run.log2_ring_size) + j;
583 0 : ring->desc[j].region = 0;
584 0 : ring->desc[j].offset =
585 0 : buffer_offset + (u32) (slot * mif->run.buffer_size);
586 0 : ring->desc[j].length = mif->run.buffer_size;
587 : }
588 : }
589 :
590 7 : ASSERT (mif->tx_queues == 0);
591 7 : vec_validate_aligned (mif->tx_queues, mif->run.num_s2m_rings - 1,
592 : CLIB_CACHE_LINE_BYTES);
593 :
594 : /* *INDENT-OFF* */
595 14 : vec_foreach_index (i, mif->tx_queues)
596 : {
597 7 : memif_queue_t *mq = vec_elt_at_index (mif->tx_queues, i);
598 7 : if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
599 : {
600 0 : err = clib_error_return_unix (0, "eventfd[tx queue %u]", i);
601 0 : goto error;
602 : }
603 :
604 7 : mq->int_clib_file_index = ~0;
605 7 : mq->ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
606 7 : mq->log2_ring_size = mif->cfg.log2_ring_size;
607 7 : mq->region = 0;
608 7 : mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
609 7 : mq->last_head = 0;
610 7 : mq->type = MEMIF_RING_S2M;
611 7 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
612 7 : vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
613 : CLIB_CACHE_LINE_BYTES);
614 : }
615 : /* *INDENT-ON* */
616 :
617 7 : ASSERT (mif->rx_queues == 0);
618 7 : vec_validate_aligned (mif->rx_queues, mif->run.num_m2s_rings - 1,
619 : CLIB_CACHE_LINE_BYTES);
620 :
621 : /* *INDENT-OFF* */
622 14 : vec_foreach_index (i, mif->rx_queues)
623 : {
624 7 : memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, i);
625 7 : if ((mq->int_fd = eventfd (0, EFD_NONBLOCK)) < 0)
626 : {
627 0 : err = clib_error_return_unix (0, "eventfd[rx queue %u]", i);
628 0 : goto error;
629 : }
630 7 : mq->int_clib_file_index = ~0;
631 7 : mq->ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
632 7 : mq->log2_ring_size = mif->cfg.log2_ring_size;
633 7 : mq->region = 0;
634 7 : mq->offset = (void *) mq->ring - (void *) mif->regions[mq->region].shm;
635 7 : mq->last_head = 0;
636 7 : mq->type = MEMIF_RING_M2S;
637 7 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
638 7 : vec_validate_aligned (mq->buffers, 1 << mq->log2_ring_size,
639 : CLIB_CACHE_LINE_BYTES);
640 : }
641 : /* *INDENT-ON* */
642 :
643 7 : return 0;
644 :
645 0 : error:
646 0 : memif_log_err (mif, "%U", format_clib_error, err);
647 0 : return err;
648 : }
649 :
650 : static uword
651 575 : memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
652 : {
653 575 : memif_main_t *mm = &memif_main;
654 : memif_if_t *mif;
655 : clib_socket_t *sock;
656 575 : uword *event_data = 0, event_type;
657 575 : u8 enabled = 0;
658 575 : f64 start_time, last_run_duration = 0, now;
659 : clib_error_t *err;
660 :
661 575 : sock = clib_mem_alloc (sizeof (clib_socket_t));
662 575 : clib_memset (sock, 0, sizeof (clib_socket_t));
663 :
664 : while (1)
665 : {
666 638 : if (enabled)
667 47 : vlib_process_wait_for_event_or_clock (vm, (f64) 3 -
668 : last_run_duration);
669 : else
670 591 : vlib_process_wait_for_event (vm);
671 :
672 63 : event_type = vlib_process_get_events (vm, &event_data);
673 63 : vec_reset_length (event_data);
674 :
675 63 : switch (event_type)
676 : {
677 3 : case ~0:
678 3 : break;
679 18 : case MEMIF_PROCESS_EVENT_START:
680 18 : enabled = 1;
681 18 : break;
682 16 : case MEMIF_PROCESS_EVENT_STOP:
683 16 : enabled = 0;
684 16 : continue;
685 26 : case MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN:
686 26 : break;
687 0 : default:
688 0 : ASSERT (0);
689 : }
690 :
691 47 : last_run_duration = start_time = vlib_time_now (vm);
692 : /* *INDENT-OFF* */
693 96 : pool_foreach (mif, mm->interfaces)
694 : {
695 49 : memif_socket_file_t * msf = vec_elt_at_index (mm->socket_files, mif->socket_file_index);
696 : /* Allow no more than 10us without a pause */
697 49 : now = vlib_time_now (vm);
698 49 : if (now > start_time + 10e-6)
699 : {
700 0 : vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
701 0 : start_time = vlib_time_now (vm);
702 : }
703 :
704 49 : if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
705 20 : continue;
706 :
707 29 : if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
708 0 : continue;
709 :
710 29 : if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
711 13 : continue;
712 :
713 16 : if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
714 : {
715 8 : clib_memset (sock, 0, sizeof(clib_socket_t));
716 8 : sock->config = (char *) msf->filename;
717 8 : sock->is_seqpacket = 1;
718 8 : sock->is_blocking = 1;
719 :
720 8 : if ((err = clib_socket_init (sock)))
721 : {
722 1 : clib_error_free (err);
723 : }
724 : else
725 : {
726 7 : clib_file_t t = { 0 };
727 :
728 7 : t.read_function = memif_slave_conn_fd_read_ready;
729 7 : t.write_function = memif_slave_conn_fd_write_ready;
730 7 : t.error_function = memif_slave_conn_fd_error;
731 7 : t.file_descriptor = sock->fd;
732 7 : t.private_data = mif->dev_instance;
733 7 : memif_file_add (&sock->private_data, &t);
734 7 : t.description = format (0, "%U ctl",
735 : format_memif_device_name,
736 : mif->dev_instance);
737 7 : hash_set (msf->dev_instance_by_fd, sock->fd, mif->dev_instance);
738 :
739 7 : mif->flags |= MEMIF_IF_FLAG_CONNECTING;
740 7 : mif->sock = sock;
741 7 : sock = clib_mem_alloc (sizeof(clib_socket_t));
742 : }
743 : }
744 : }
745 : /* *INDENT-ON* */
746 47 : last_run_duration = vlib_time_now (vm) - last_run_duration;
747 : }
748 : return 0;
749 : }
750 :
751 85850 : VLIB_REGISTER_NODE (memif_process_node,static) = {
752 : .function = memif_process,
753 : .type = VLIB_NODE_TYPE_PROCESS,
754 : .name = "memif-process",
755 : };
756 :
757 : /*
758 : * Returns an unused socket id, and ~0 if it can't find one.
759 : */
760 : u32
761 0 : memif_get_unused_socket_id ()
762 : {
763 0 : memif_main_t *mm = &memif_main;
764 : uword *p;
765 : int i, j;
766 :
767 : static u32 seed = 0;
768 : /* limit to 1M tries */
769 0 : for (j = 0; j < 1 << 10; j++)
770 : {
771 0 : seed = random_u32 (&seed);
772 0 : for (i = 0; i < 1 << 10; i++)
773 : {
774 : /* look around randomly generated id */
775 0 : seed += (2 * (i % 2) - 1) * i;
776 0 : if (seed == (u32) ~0)
777 0 : continue;
778 0 : p = hash_get (mm->socket_file_index_by_sock_id, seed);
779 0 : if (!p)
780 0 : return seed;
781 : }
782 : }
783 :
784 0 : return ~0;
785 : }
786 :
787 : clib_error_t *
788 599 : memif_socket_filename_add_del (u8 is_add, u32 sock_id, char *sock_filename)
789 : {
790 599 : memif_main_t *mm = &memif_main;
791 : uword *p;
792 : memif_socket_file_t *msf;
793 599 : clib_error_t *err = 0;
794 599 : char *dir = 0, *tmp;
795 599 : u32 idx = 0;
796 599 : u8 *name = 0;
797 :
798 : /* allow adding socket id 0 */
799 599 : if (sock_id == 0 && is_add == 0)
800 0 : return vnet_error (VNET_ERR_INVALID_ARGUMENT, "cannot delete socket id 0");
801 :
802 599 : if (sock_id == ~0)
803 0 : return vnet_error (VNET_ERR_INVALID_ARGUMENT,
804 : "socked id is not specified");
805 :
806 599 : if (is_add == 0)
807 : {
808 9 : p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
809 9 : if (!p)
810 : /* Don't delete non-existent entries. */
811 0 : return vnet_error (VNET_ERR_INVALID_ARGUMENT,
812 : "socket file with id %u does not exist", sock_id);
813 :
814 9 : msf = pool_elt_at_index (mm->socket_files, *p);
815 9 : if (msf->ref_cnt > 0)
816 0 : return vnet_error (VNET_ERR_UNEXPECTED_INTF_STATE,
817 0 : "socket file '%s' is in use", msf->filename);
818 :
819 9 : vec_free (msf->filename);
820 9 : pool_put (mm->socket_files, msf);
821 :
822 9 : hash_unset (mm->socket_file_index_by_sock_id, sock_id);
823 :
824 9 : return 0;
825 : }
826 :
827 590 : if (sock_filename == 0 || sock_filename[0] == 0)
828 0 : return vnet_error (VNET_ERR_INVALID_ARGUMENT,
829 : "socket filename not specified");
830 :
831 590 : if (clib_socket_prefix_is_valid (sock_filename))
832 : {
833 0 : name = format (0, "%s%c", sock_filename, 0);
834 : }
835 590 : else if (sock_filename[0] == '/')
836 : {
837 11 : name = format (0, "%s%c", sock_filename, 0);
838 : }
839 : else
840 : {
841 : /* copy runtime dir path */
842 579 : vec_add (dir, vlib_unix_get_runtime_dir (),
843 : strlen (vlib_unix_get_runtime_dir ()));
844 579 : vec_add1 (dir, '/');
845 :
846 : /* if sock_filename contains dirs, add them to path */
847 579 : tmp = strrchr (sock_filename, '/');
848 579 : if (tmp)
849 : {
850 2 : idx = tmp - sock_filename;
851 2 : vec_add (dir, sock_filename, idx);
852 : }
853 :
854 579 : vec_add1 (dir, '\0');
855 : /* create socket dir */
856 579 : if ((err = vlib_unix_recursive_mkdir (dir)))
857 : {
858 0 : clib_error_free (err);
859 0 : err = vnet_error (VNET_ERR_SYSCALL_ERROR_1,
860 : "unable to create socket dir");
861 0 : goto done;
862 : }
863 :
864 579 : name =
865 579 : format (0, "%s/%s%c", vlib_unix_get_runtime_dir (), sock_filename, 0);
866 : }
867 :
868 590 : p = hash_get (mm->socket_file_index_by_sock_id, sock_id);
869 590 : if (p)
870 : {
871 0 : msf = pool_elt_at_index (mm->socket_files, *p);
872 0 : if (strcmp ((char *) msf->filename, (char *) name) == 0)
873 : {
874 : /* Silently accept identical "add". */
875 0 : goto done;
876 : }
877 :
878 : /* But don't allow a direct add of a different filename. */
879 0 : err = vnet_error (VNET_ERR_ENTRY_ALREADY_EXISTS, "entry already exists");
880 0 : goto done;
881 : }
882 :
883 590 : pool_get (mm->socket_files, msf);
884 590 : clib_memset (msf, 0, sizeof (memif_socket_file_t));
885 :
886 590 : msf->filename = name;
887 590 : msf->socket_id = sock_id;
888 590 : name = 0;
889 :
890 590 : hash_set (mm->socket_file_index_by_sock_id, sock_id, msf - mm->socket_files);
891 :
892 590 : done:
893 590 : vec_free (name);
894 590 : vec_free (dir);
895 590 : return err;
896 : }
897 :
898 : clib_error_t *
899 16 : memif_delete_if (vlib_main_t *vm, memif_if_t *mif)
900 : {
901 16 : vnet_main_t *vnm = vnet_get_main ();
902 16 : memif_main_t *mm = &memif_main;
903 16 : memif_socket_file_t *msf =
904 16 : vec_elt_at_index (mm->socket_files, mif->socket_file_index);
905 : clib_error_t *err;
906 :
907 16 : mif->flags |= MEMIF_IF_FLAG_DELETING;
908 16 : vec_free (mif->local_disc_string);
909 16 : vec_free (mif->remote_disc_string);
910 :
911 : /* bring down the interface */
912 16 : vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
913 16 : vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
914 :
915 16 : err = clib_error_return (0, "interface deleted");
916 16 : memif_disconnect (mif, err);
917 16 : clib_error_free (err);
918 :
919 16 : if (mif->hw_if_index != ~0)
920 : {
921 : /* remove the interface */
922 16 : if (mif->mode == MEMIF_INTERFACE_MODE_IP)
923 0 : vnet_delete_hw_interface (vnm, mif->hw_if_index);
924 : else
925 16 : ethernet_delete_interface (vnm, mif->hw_if_index);
926 16 : mif->hw_if_index = ~0;
927 : }
928 :
929 : /* free interface data structures */
930 16 : mhash_unset (&msf->dev_instance_by_id, &mif->id, 0);
931 :
932 : /* remove socket file */
933 16 : if (--(msf->ref_cnt) == 0)
934 : {
935 16 : if (msf->is_listener)
936 : {
937 : int i;
938 : /* *INDENT-OFF* */
939 8 : vec_foreach_index (i, msf->pending_clients)
940 0 : memif_socket_close (msf->pending_clients + i);
941 : /* *INDENT-ON* */
942 8 : memif_socket_close (&msf->sock);
943 8 : vec_free (msf->pending_clients);
944 : }
945 16 : mhash_free (&msf->dev_instance_by_id);
946 16 : hash_free (msf->dev_instance_by_fd);
947 16 : if (msf->sock)
948 : {
949 0 : err = clib_socket_close (msf->sock);
950 0 : if (err)
951 : {
952 0 : memif_log_err (mif, "%U", format_clib_error, err);
953 0 : clib_error_free (err);
954 : }
955 0 : clib_mem_free (msf->sock);
956 : }
957 : }
958 :
959 16 : vec_free (mif->local_disc_string);
960 16 : clib_memset (mif, 0, sizeof (*mif));
961 16 : pool_put (mm->interfaces, mif);
962 :
963 16 : if (pool_elts (mm->interfaces) == 0)
964 16 : vlib_process_signal_event (vm, memif_process_node.index,
965 : MEMIF_PROCESS_EVENT_STOP, 0);
966 :
967 16 : return 0;
968 : }
969 :
970 : /* *INDENT-OFF* */
971 3455 : VNET_HW_INTERFACE_CLASS (memif_ip_hw_if_class, static) = {
972 : .name = "memif-ip",
973 : .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
974 : .tx_hash_fn_type = VNET_HASH_FN_TYPE_IP,
975 : };
976 : /* *INDENT-ON* */
977 :
978 : static void
979 0 : memif_prepare_dma_args (vlib_dma_config_t *args)
980 : {
981 0 : args->max_batches = 256;
982 0 : args->max_transfer_size = VLIB_BUFFER_DEFAULT_DATA_SIZE;
983 0 : args->barrier_before_last = 1;
984 0 : args->sw_fallback = 1;
985 0 : args->callback_fn = NULL;
986 0 : }
987 :
988 : clib_error_t *
989 22 : memif_create_if (vlib_main_t *vm, memif_create_if_args_t *args)
990 : {
991 22 : memif_main_t *mm = &memif_main;
992 22 : vlib_thread_main_t *tm = vlib_get_thread_main ();
993 22 : vnet_main_t *vnm = vnet_get_main ();
994 22 : vnet_eth_interface_registration_t eir = {};
995 22 : memif_if_t *mif = 0;
996 : vnet_sw_interface_t *sw;
997 : uword *p;
998 22 : memif_socket_file_t *msf = 0;
999 22 : clib_error_t *err = 0;
1000 :
1001 22 : p = hash_get (mm->socket_file_index_by_sock_id, args->socket_id);
1002 22 : if (p == 0)
1003 : {
1004 0 : err = vnet_error (VNET_ERR_INVALID_ARGUMENT, "unknown socket id");
1005 0 : goto done;
1006 : }
1007 :
1008 22 : msf = vec_elt_at_index (mm->socket_files, p[0]);
1009 :
1010 : /* existing socket file can be either master or slave but cannot be both */
1011 22 : if (msf->ref_cnt > 0)
1012 : {
1013 0 : if ((!msf->is_listener != !args->is_master))
1014 : {
1015 : err =
1016 0 : vnet_error (VNET_ERR_SUBIF_ALREADY_EXISTS,
1017 : "socket file cannot be used by both master and slave");
1018 0 : goto done;
1019 : }
1020 :
1021 0 : p = mhash_get (&msf->dev_instance_by_id, &args->id);
1022 0 : if (p)
1023 : {
1024 0 : err = vnet_error (VNET_ERR_SUBIF_ALREADY_EXISTS,
1025 : "interface already exists");
1026 0 : goto done;
1027 : }
1028 : }
1029 :
1030 : /* Create new socket file */
1031 22 : if (msf->ref_cnt == 0)
1032 : {
1033 22 : mhash_init (&msf->dev_instance_by_id, sizeof (uword),
1034 : sizeof (memif_interface_id_t));
1035 22 : msf->dev_instance_by_fd = hash_create (0, sizeof (uword));
1036 22 : msf->is_listener = (args->is_master != 0);
1037 :
1038 22 : memif_log_debug (0, "initializing socket file %s", msf->filename);
1039 : }
1040 :
1041 22 : if (mm->per_thread_data == 0)
1042 : {
1043 : int i;
1044 :
1045 4 : vec_validate_aligned (mm->per_thread_data, tm->n_vlib_mains - 1,
1046 : CLIB_CACHE_LINE_BYTES);
1047 :
1048 8 : for (i = 0; i < tm->n_vlib_mains; i++)
1049 : {
1050 4 : memif_per_thread_data_t *ptd =
1051 4 : vec_elt_at_index (mm->per_thread_data, i);
1052 4 : vlib_buffer_t *bt = &ptd->buffer_template;
1053 4 : clib_memset (bt, 0, sizeof (vlib_buffer_t));
1054 4 : bt->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
1055 4 : bt->total_length_not_including_first_buffer = 0;
1056 4 : vnet_buffer (bt)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1057 :
1058 4 : vec_validate_aligned (ptd->copy_ops, 0, CLIB_CACHE_LINE_BYTES);
1059 4 : vec_reset_length (ptd->copy_ops);
1060 4 : vec_validate_aligned (ptd->buffers, 0, CLIB_CACHE_LINE_BYTES);
1061 4 : vec_reset_length (ptd->buffers);
1062 : }
1063 : }
1064 :
1065 22 : pool_get (mm->interfaces, mif);
1066 22 : clib_memset (mif, 0, sizeof (*mif));
1067 22 : mif->dev_instance = mif - mm->interfaces;
1068 22 : mif->socket_file_index = msf - mm->socket_files;
1069 22 : mif->id = args->id;
1070 22 : mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
1071 22 : mif->mode = args->mode;
1072 22 : if (args->secret)
1073 6 : mif->secret = vec_dup (args->secret);
1074 :
1075 : /* register dma config if enabled */
1076 22 : if (args->use_dma)
1077 : {
1078 : vlib_dma_config_t dma_args;
1079 0 : bzero (&dma_args, sizeof (dma_args));
1080 0 : memif_prepare_dma_args (&dma_args);
1081 :
1082 0 : dma_args.max_transfers = 1 << args->log2_ring_size;
1083 0 : dma_args.callback_fn = memif_dma_completion_cb;
1084 0 : mif->dma_input_config = vlib_dma_config_add (vm, &dma_args);
1085 0 : dma_args.callback_fn = memif_tx_dma_completion_cb;
1086 0 : mif->dma_tx_config = vlib_dma_config_add (vm, &dma_args);
1087 : }
1088 :
1089 22 : if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
1090 : {
1091 :
1092 22 : if (!args->hw_addr_set)
1093 : {
1094 22 : f64 now = vlib_time_now (vm);
1095 : u32 rnd;
1096 22 : rnd = (u32) (now * 1e6);
1097 22 : rnd = random_u32 (&rnd);
1098 :
1099 22 : memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
1100 22 : args->hw_addr[0] = 2;
1101 22 : args->hw_addr[1] = 0xfe;
1102 : }
1103 :
1104 22 : eir.dev_class_index = memif_device_class.index;
1105 22 : eir.dev_instance = mif->dev_instance;
1106 22 : eir.address = args->hw_addr;
1107 22 : eir.cb.flag_change = memif_eth_flag_change;
1108 22 : eir.cb.set_max_frame_size = memif_eth_set_max_frame_size;
1109 22 : mif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
1110 : }
1111 0 : else if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1112 : {
1113 0 : mif->hw_if_index =
1114 0 : vnet_register_interface (vnm, memif_device_class.index,
1115 0 : mif->dev_instance,
1116 : memif_ip_hw_if_class.index,
1117 0 : mif->dev_instance);
1118 : }
1119 : else
1120 : {
1121 : err =
1122 0 : vnet_error (VNET_ERR_SYSCALL_ERROR_2, "unsupported interface mode");
1123 0 : goto error;
1124 : }
1125 :
1126 22 : sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
1127 22 : mif->sw_if_index = sw->sw_if_index;
1128 :
1129 22 : mif->cfg.log2_ring_size = args->log2_ring_size;
1130 22 : mif->cfg.buffer_size = args->buffer_size;
1131 22 : mif->cfg.num_s2m_rings =
1132 22 : args->is_master ? args->rx_queues : args->tx_queues;
1133 22 : mif->cfg.num_m2s_rings =
1134 22 : args->is_master ? args->tx_queues : args->rx_queues;
1135 :
1136 22 : args->sw_if_index = mif->sw_if_index;
1137 :
1138 : /* If this is new one, start listening */
1139 22 : if (msf->is_listener && msf->ref_cnt == 0)
1140 : {
1141 11 : clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
1142 :
1143 11 : ASSERT (msf->sock == 0);
1144 11 : msf->sock = s;
1145 :
1146 11 : clib_memset (s, 0, sizeof (clib_socket_t));
1147 11 : s->config = (char *) msf->filename;
1148 11 : s->local_only = 1;
1149 11 : s->is_server = 1;
1150 11 : s->allow_group_write = 1;
1151 11 : s->is_seqpacket = 1;
1152 11 : s->passcred = 1;
1153 :
1154 11 : if ((err = clib_socket_init (s)))
1155 : {
1156 0 : err->code = VNET_ERR_SYSCALL_ERROR_4;
1157 0 : goto error;
1158 : }
1159 :
1160 11 : clib_file_t template = { 0 };
1161 11 : template.read_function = memif_conn_fd_accept_ready;
1162 11 : template.file_descriptor = msf->sock->fd;
1163 11 : template.private_data = mif->socket_file_index;
1164 11 : template.description = format (0, "memif listener %s", msf->filename);
1165 11 : memif_file_add (&msf->sock->private_data, &template);
1166 : }
1167 :
1168 22 : msf->ref_cnt++;
1169 :
1170 22 : if (args->is_master == 0)
1171 : {
1172 11 : mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
1173 11 : if (args->is_zero_copy)
1174 11 : mif->flags |= MEMIF_IF_FLAG_ZERO_COPY;
1175 : }
1176 :
1177 22 : if (args->use_dma)
1178 0 : mif->flags |= MEMIF_IF_FLAG_USE_DMA;
1179 :
1180 22 : vnet_hw_if_set_caps (vnm, mif->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
1181 22 : vnet_hw_if_set_input_node (vnm, mif->hw_if_index, memif_input_node.index);
1182 22 : mhash_set (&msf->dev_instance_by_id, &mif->id, mif->dev_instance, 0);
1183 :
1184 22 : if (pool_elts (mm->interfaces) == 1)
1185 : {
1186 18 : vlib_process_signal_event (vm, memif_process_node.index,
1187 : MEMIF_PROCESS_EVENT_START, 0);
1188 : }
1189 22 : goto done;
1190 :
1191 0 : error:
1192 0 : memif_delete_if (vm, mif);
1193 0 : if (err)
1194 0 : memif_log_err (mif, "%U", format_clib_error, err);
1195 0 : return err;
1196 :
1197 22 : done:
1198 22 : return err;
1199 : }
1200 :
1201 : clib_error_t *
1202 26 : memif_interface_admin_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
1203 : {
1204 26 : memif_main_t *mm = &memif_main;
1205 26 : vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
1206 26 : memif_if_t *mif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
1207 : static clib_error_t *error = 0;
1208 :
1209 26 : if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1210 : {
1211 16 : if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
1212 : {
1213 4 : vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
1214 : VNET_HW_INTERFACE_FLAG_LINK_UP);
1215 : }
1216 16 : mif->flags |= MEMIF_IF_FLAG_ADMIN_UP;
1217 : }
1218 : else
1219 10 : mif->flags &= ~MEMIF_IF_FLAG_ADMIN_UP;
1220 :
1221 26 : vlib_process_signal_event (vnm->vlib_main, memif_process_node.index,
1222 : MEMIF_PROCESS_EVENT_ADMIN_UP_DOWN, 0);
1223 26 : return error;
1224 : }
1225 :
1226 : static clib_error_t *
1227 575 : memif_init (vlib_main_t * vm)
1228 : {
1229 575 : memif_main_t *mm = &memif_main;
1230 :
1231 575 : clib_memset (mm, 0, sizeof (memif_main_t));
1232 :
1233 575 : mm->log_class = vlib_log_register_class ("memif_plugin", 0);
1234 575 : memif_log_debug (0, "initialized");
1235 :
1236 : /* initialize binary API */
1237 575 : memif_plugin_api_hookup (vm);
1238 :
1239 : /*
1240 : * Pre-stuff socket filename pool with a non-modifieable mapping
1241 : * for socket-id 0 to MEMIF_DEFAULT_SOCKET_FILENAME in the
1242 : * default run-time directory.
1243 : */
1244 575 : return memif_socket_filename_add_del (1, 0, MEMIF_DEFAULT_SOCKET_FILENAME);
1245 : }
1246 :
1247 1151 : VLIB_INIT_FUNCTION (memif_init);
1248 :
1249 : /* *INDENT-OFF* */
1250 : VLIB_PLUGIN_REGISTER () = {
1251 : .version = VPP_BUILD_VER,
1252 : .description = "Packet Memory Interface (memif) -- Experimental",
1253 : };
1254 : /* *INDENT-ON* */
1255 :
1256 : /*
1257 : * fd.io coding-style-patch-verification: ON
1258 : *
1259 : * Local Variables:
1260 : * eval: (c-set-style "gnu")
1261 : * End:
1262 : */
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