2 *------------------------------------------------------------------
3 * Copyright (c) 2016 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 *------------------------------------------------------------------
21 #include <sys/types.h>
23 #include <sys/ioctl.h>
24 #include <sys/socket.h>
28 #include <sys/prctl.h>
31 #include <vlib/vlib.h>
32 #include <vlib/unix/unix.h>
33 #include <vnet/plugin/plugin.h>
34 #include <vnet/ethernet/ethernet.h>
35 #include <vpp/app/version.h>
36 #include <memif/memif.h>
41 #define DEBUG_LOG(...) clib_warning(__VA_ARGS__)
42 #define DEBUG_UNIX_LOG(...) clib_unix_warning(__VA_ARGS__)
44 #define DEBUG_LOG(...)
47 memif_main_t memif_main;
49 static clib_error_t *memif_conn_fd_read_ready (unix_file_t * uf);
50 static clib_error_t *memif_int_fd_read_ready (unix_file_t * uf);
53 memif_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
60 memif_remove_pending_conn (memif_pending_conn_t * pending_conn)
62 memif_main_t *mm = &memif_main;
64 unix_file_del (&unix_main,
65 unix_main.file_pool + pending_conn->connection.index);
66 pool_put (mm->pending_conns, pending_conn);
70 memif_connect (vlib_main_t * vm, memif_if_t * mif)
72 vnet_main_t *vnm = vnet_get_main ();
73 int num_rings = mif->num_s2m_rings + mif->num_m2s_rings;
74 memif_ring_data_t *rd = NULL;
76 vec_validate_aligned (mif->ring_data, num_rings - 1, CLIB_CACHE_LINE_BYTES);
77 vec_foreach (rd, mif->ring_data)
82 mif->flags &= ~MEMIF_IF_FLAG_CONNECTING;
83 mif->flags |= MEMIF_IF_FLAG_CONNECTED;
84 vnet_hw_interface_set_flags (vnm, mif->hw_if_index,
85 VNET_HW_INTERFACE_FLAG_LINK_UP);
89 memif_disconnect (vlib_main_t * vm, memif_if_t * mif)
91 vnet_main_t *vnm = vnet_get_main ();
93 mif->flags &= ~(MEMIF_IF_FLAG_CONNECTED | MEMIF_IF_FLAG_CONNECTING);
94 if (mif->hw_if_index != ~0)
95 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
97 if (mif->interrupt_line.index != ~0)
99 unix_file_del (&unix_main,
100 unix_main.file_pool + mif->interrupt_line.index);
101 mif->interrupt_line.index = ~0;
102 mif->interrupt_line.fd = -1; /* closed in unix_file_del */
104 if (mif->connection.index != ~0)
106 unix_file_del (&unix_main, unix_main.file_pool + mif->connection.index);
107 mif->connection.index = ~0;
108 mif->connection.fd = -1; /* closed in unix_file_del */
111 // TODO: properly munmap + close memif-owned shared memory segments
112 vec_free (mif->regions);
115 static clib_error_t *
116 memif_process_connect_req (memif_pending_conn_t * pending_conn,
117 memif_msg_t * req, struct ucred *slave_cr,
118 int shm_fd, int int_fd)
120 memif_main_t *mm = &memif_main;
121 vlib_main_t *vm = vlib_get_main ();
122 int fd = pending_conn->connection.fd;
125 memif_msg_t resp = { 0 };
126 unix_file_t template = { 0 };
130 static clib_error_t *error = 0;
135 ("Connection request is missing shared memory file descriptor");
143 ("Connection request is missing interrupt line file descriptor");
148 if (slave_cr == NULL)
150 DEBUG_LOG ("Connection request is missing slave credentials");
155 p = mhash_get (&mm->if_index_by_key, &req->key);
159 ("Connection request with unmatched key (0x%" PRIx64 ")", req->key);
164 mif = vec_elt_at_index (mm->interfaces, *p);
165 if (mif->listener_index != pending_conn->listener_index)
168 ("Connection request with non-matching listener (%d vs. %d)",
169 pending_conn->listener_index, mif->listener_index);
174 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
176 DEBUG_LOG ("Memif slave does not accept connection requests");
181 if (mif->connection.fd != -1)
184 ("Memif with key 0x%" PRIx64 " is already connected", mif->key);
189 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
191 /* just silently decline the request */
196 if (req->shared_mem_size < sizeof (memif_shm_t))
199 ("Unexpectedly small shared memory segment received from slave.");
205 mmap (NULL, req->shared_mem_size, PROT_READ | PROT_WRITE, MAP_SHARED,
206 shm_fd, 0)) == MAP_FAILED)
209 ("Failed to map shared memory segment received from slave memif");
210 error = clib_error_return_unix (0, "mmap fd %d", shm_fd);
215 if (((memif_shm_t *) shm)->cookie != 0xdeadbeef)
218 ("Possibly corrupted shared memory segment received from slave memif");
219 munmap (shm, req->shared_mem_size);
224 mif->log2_ring_size = req->log2_ring_size;
225 mif->num_s2m_rings = req->num_s2m_rings;
226 mif->num_m2s_rings = req->num_m2s_rings;
227 mif->buffer_size = req->buffer_size;
228 mif->remote_pid = slave_cr->pid;
229 mif->remote_uid = slave_cr->uid;
230 vec_add1 (mif->regions, shm);
232 /* register interrupt line */
233 mif->interrupt_line.fd = int_fd;
234 template.read_function = memif_int_fd_read_ready;
235 template.file_descriptor = int_fd;
236 template.private_data = mif->if_index;
237 mif->interrupt_line.index = unix_file_add (&unix_main, &template);
239 /* change context for future messages */
240 uf = vec_elt_at_index (unix_main.file_pool, pending_conn->connection.index);
241 uf->private_data = mif->if_index << 1;
242 mif->connection = pending_conn->connection;
243 pool_put (mm->pending_conns, pending_conn);
245 memif_connect (vm, mif);
248 resp.version = MEMIF_VERSION;
249 resp.type = MEMIF_MSG_TYPE_CONNECT_RESP;
250 resp.retval = retval;
251 if (send (fd, &resp, sizeof (resp), 0) < 0)
253 DEBUG_UNIX_LOG ("Failed to send connection response");
254 error = clib_error_return_unix (0, "send fd %d", fd);
255 memif_disconnect (vm, mif);
260 static clib_error_t *
261 memif_process_connect_resp (memif_if_t * mif, memif_msg_t * resp)
263 vlib_main_t *vm = vlib_get_main ();
265 if ((mif->flags & MEMIF_IF_FLAG_IS_SLAVE) == 0)
267 DEBUG_LOG ("Memif master does not accept connection responses");
271 if ((mif->flags & MEMIF_IF_FLAG_CONNECTING) == 0)
273 DEBUG_LOG ("Unexpected connection response");
277 if (resp->retval == 0)
278 memif_connect (vm, mif);
280 memif_disconnect (vm, mif);
285 static clib_error_t *
286 memif_conn_fd_read_ready (unix_file_t * uf)
288 memif_main_t *mm = &memif_main;
289 vlib_main_t *vm = vlib_get_main ();
291 memif_pending_conn_t *pending_conn = 0;
292 int fd_array[2] = { -1, -1 };
293 char ctl[CMSG_SPACE (sizeof (fd_array)) +
294 CMSG_SPACE (sizeof (struct ucred))] = { 0 };
295 struct msghdr mh = { 0 };
297 struct ucred *cr = 0;
298 memif_msg_t msg = { 0 };
299 struct cmsghdr *cmsg;
301 static clib_error_t *error = 0;
303 iov[0].iov_base = (void *) &msg;
304 iov[0].iov_len = sizeof (memif_msg_t);
307 mh.msg_control = ctl;
308 mh.msg_controllen = sizeof (ctl);
310 /* grab the appropriate context */
311 if (uf->private_data & 1)
312 pending_conn = vec_elt_at_index (mm->pending_conns,
313 uf->private_data >> 1);
315 mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 1);
317 /* receive the incoming message */
318 size = recvmsg (uf->file_descriptor, &mh, 0);
319 if (size != sizeof (memif_msg_t))
323 DEBUG_UNIX_LOG ("Malformed message received on fd %d",
324 uf->file_descriptor);
325 error = clib_error_return_unix (0, "recvmsg fd %d",
326 uf->file_descriptor);
331 /* check version of the sender's memif plugin */
332 if (msg.version != MEMIF_VERSION)
334 DEBUG_LOG ("Memif version mismatch");
338 /* process the message based on its type */
341 case MEMIF_MSG_TYPE_CONNECT_REQ:
342 if (pending_conn == 0)
344 DEBUG_LOG ("Received unexpected connection request");
348 /* Read anciliary data */
349 cmsg = CMSG_FIRSTHDR (&mh);
352 if (cmsg->cmsg_level == SOL_SOCKET
353 && cmsg->cmsg_type == SCM_CREDENTIALS)
355 cr = (struct ucred *) CMSG_DATA (cmsg);
357 else if (cmsg->cmsg_level == SOL_SOCKET
358 && cmsg->cmsg_type == SCM_RIGHTS)
360 clib_memcpy (fd_array, CMSG_DATA (cmsg), sizeof (fd_array));
362 cmsg = CMSG_NXTHDR (&mh, cmsg);
365 return memif_process_connect_req (pending_conn, &msg, cr,
366 fd_array[0], fd_array[1]);
368 case MEMIF_MSG_TYPE_CONNECT_RESP:
371 DEBUG_LOG ("Received unexpected connection response");
374 return memif_process_connect_resp (mif, &msg);
376 case MEMIF_MSG_TYPE_DISCONNECT:
380 DEBUG_LOG ("Received unknown message type");
388 memif_remove_pending_conn (pending_conn);
390 memif_disconnect (vm, mif);
394 static clib_error_t *
395 memif_int_fd_read_ready (unix_file_t * uf)
397 memif_main_t *mm = &memif_main;
398 vlib_main_t *vm = vlib_get_main ();
399 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data);
403 size = read (uf->file_descriptor, &b, sizeof (b));
406 /* interrupt line was disconnected */
407 unix_file_del (&unix_main,
408 unix_main.file_pool + mif->interrupt_line.index);
409 mif->interrupt_line.index = ~0;
410 mif->interrupt_line.fd = -1;
412 vlib_node_set_interrupt_pending (vm, memif_input_node.index);
416 static clib_error_t *
417 memif_conn_fd_accept_ready (unix_file_t * uf)
419 memif_main_t *mm = &memif_main;
420 memif_listener_t *listener = 0;
421 memif_pending_conn_t *pending_conn = 0;
423 struct sockaddr_un client;
425 unix_file_t template = { 0 };
427 listener = pool_elt_at_index (mm->listeners, uf->private_data);
429 addr_len = sizeof (client);
430 conn_fd = accept (uf->file_descriptor,
431 (struct sockaddr *) &client, (socklen_t *) & addr_len);
434 return clib_error_return_unix (0, "accept fd %d", uf->file_descriptor);
436 pool_get (mm->pending_conns, pending_conn);
437 pending_conn->index = pending_conn - mm->pending_conns;
438 pending_conn->listener_index = listener->index;
439 pending_conn->connection.fd = conn_fd;
441 template.read_function = memif_conn_fd_read_ready;
442 template.file_descriptor = conn_fd;
443 template.private_data = (pending_conn->index << 1) | 1;
444 pending_conn->connection.index = unix_file_add (&unix_main, &template);
450 memif_connect_master (vlib_main_t * vm, memif_if_t * mif)
453 struct msghdr mh = { 0 };
455 struct cmsghdr *cmsg;
458 int fd_array[2] = { -1, -1 };
459 char ctl[CMSG_SPACE (sizeof (fd_array))];
460 memif_ring_t *ring = NULL;
464 unix_file_t template = { 0 };
466 msg.version = MEMIF_VERSION;
467 msg.type = MEMIF_MSG_TYPE_CONNECT_REQ;
469 msg.log2_ring_size = mif->log2_ring_size;
470 msg.num_s2m_rings = mif->num_s2m_rings;
471 msg.num_m2s_rings = mif->num_m2s_rings;
472 msg.buffer_size = mif->buffer_size;
474 buffer_offset = sizeof (memif_shm_t) +
475 (mif->num_s2m_rings + mif->num_m2s_rings) *
476 (sizeof (memif_ring_t) +
477 sizeof (memif_desc_t) * (1 << mif->log2_ring_size));
479 msg.shared_mem_size = buffer_offset +
480 mif->buffer_size * (1 << mif->log2_ring_size) * (mif->num_s2m_rings +
483 if ((mfd = memfd_create ("shared mem", MFD_ALLOW_SEALING)) == -1)
485 DEBUG_LOG ("Failed to create anonymous file");
489 if ((fcntl (mfd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
491 DEBUG_UNIX_LOG ("Failed to seal an anonymous file off from truncating");
495 if ((ftruncate (mfd, msg.shared_mem_size)) == -1)
497 DEBUG_UNIX_LOG ("Failed to extend the size of an anonymous file");
501 if ((shm = mmap (NULL, msg.shared_mem_size, PROT_READ | PROT_WRITE,
502 MAP_SHARED, mfd, 0)) == MAP_FAILED)
504 DEBUG_UNIX_LOG ("Failed to map anonymous file into memory");
508 vec_add1 (mif->regions, shm);
509 ((memif_shm_t *) mif->regions[0])->cookie = 0xdeadbeef;
511 for (i = 0; i < mif->num_s2m_rings; i++)
513 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
514 ring->head = ring->tail = 0;
515 for (j = 0; j < (1 << mif->log2_ring_size); j++)
517 u16 slot = i * (1 << mif->log2_ring_size) + j;
518 ring->desc[j].region = 0;
519 ring->desc[j].offset =
520 buffer_offset + (u32) (slot * mif->buffer_size);
521 ring->desc[j].buffer_length = mif->buffer_size;
524 for (i = 0; i < mif->num_m2s_rings; i++)
526 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
527 ring->head = ring->tail = 0;
528 for (j = 0; j < (1 << mif->log2_ring_size); j++)
531 (i + mif->num_s2m_rings) * (1 << mif->log2_ring_size) + j;
532 ring->desc[j].region = 0;
533 ring->desc[j].offset =
534 buffer_offset + (u32) (slot * mif->buffer_size);
535 ring->desc[j].buffer_length = mif->buffer_size;
539 iov[0].iov_base = (void *) &msg;
540 iov[0].iov_len = sizeof (memif_msg_t);
544 /* create interrupt socket */
545 if (socketpair (AF_UNIX, SOCK_STREAM, 0, fd_array) < 0)
547 DEBUG_UNIX_LOG ("Failed to create a pair of connected sockets");
551 mif->interrupt_line.fd = fd_array[0];
552 template.read_function = memif_int_fd_read_ready;
553 template.file_descriptor = mif->interrupt_line.fd;
554 template.private_data = mif->if_index;
555 mif->interrupt_line.index = unix_file_add (&unix_main, &template);
557 memset (&ctl, 0, sizeof (ctl));
558 mh.msg_control = ctl;
559 mh.msg_controllen = sizeof (ctl);
560 cmsg = CMSG_FIRSTHDR (&mh);
561 cmsg->cmsg_len = CMSG_LEN (sizeof (fd_array));
562 cmsg->cmsg_level = SOL_SOCKET;
563 cmsg->cmsg_type = SCM_RIGHTS;
565 clib_memcpy (CMSG_DATA (cmsg), fd_array, sizeof (fd_array));
567 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
568 rv = sendmsg (mif->connection.fd, &mh, 0);
571 DEBUG_UNIX_LOG ("Failed to send memif connection request");
575 /* No need to keep the descriptor open,
576 * mmap creates an extra reference to the underlying file */
579 /* This FD is given to peer, so we can close it */
587 if (fd_array[1] > -1)
589 memif_disconnect (vm, mif);
593 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
595 memif_main_t *mm = &memif_main;
597 struct sockaddr_un sun;
599 uword *event_data = 0, event_type;
600 unix_file_t template = { 0 };
602 f64 start_time, last_run_duration = 0, now;
604 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
607 DEBUG_UNIX_LOG ("socket AF_UNIX");
610 sun.sun_family = AF_UNIX;
611 template.read_function = memif_conn_fd_read_ready;
616 vlib_process_wait_for_event_or_clock (vm,
617 (f64) 3 - last_run_duration);
619 vlib_process_wait_for_event (vm);
621 event_type = vlib_process_get_events (vm, &event_data);
622 vec_reset_length (event_data);
628 case MEMIF_PROCESS_EVENT_START:
631 case MEMIF_PROCESS_EVENT_STOP:
638 last_run_duration = start_time = vlib_time_now (vm);
640 pool_foreach (mif, mm->interfaces,
642 /* Allow no more than 10us without a pause */
643 now = vlib_time_now (vm);
644 if (now > start_time + 10e-6)
646 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
647 start_time = vlib_time_now (vm);
650 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
653 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
656 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
659 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
661 strncpy (sun.sun_path, (char *) mif->socket_filename,
662 sizeof (sun.sun_path) - 1);
665 (sockfd, (struct sockaddr *) &sun,
666 sizeof (struct sockaddr_un)) == 0)
668 mif->connection.fd = sockfd;
669 template.file_descriptor = sockfd;
670 template.private_data = mif->if_index << 1;
671 mif->connection.index = unix_file_add (&unix_main, &template);
672 memif_connect_master (vm, mif);
674 /* grab another fd */
675 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
678 DEBUG_UNIX_LOG ("socket AF_UNIX");
685 last_run_duration = vlib_time_now (vm) - last_run_duration;
691 VLIB_REGISTER_NODE (memif_process_node,static) = {
692 .function = memif_process,
693 .type = VLIB_NODE_TYPE_PROCESS,
694 .name = "memif-process",
699 memif_close_if (memif_main_t * mm, memif_if_t * mif)
701 vlib_main_t *vm = vlib_get_main ();
702 memif_listener_t *listener = 0;
703 memif_pending_conn_t *pending_conn = 0;
705 memif_disconnect (vm, mif);
707 if (mif->listener_index != (uword) ~ 0)
709 listener = pool_elt_at_index (mm->listeners, mif->listener_index);
710 if (--listener->usage_counter == 0)
712 /* not used anymore -> remove the socket and pending connections */
715 pool_foreach (pending_conn, mm->pending_conns,
717 if (pending_conn->listener_index == mif->listener_index)
719 memif_remove_pending_conn (pending_conn);
724 unix_file_del (&unix_main,
725 unix_main.file_pool + listener->socket.index);
726 pool_put (mm->listeners, listener);
727 unlink ((char *) mif->socket_filename);
731 clib_spinlock_free (&mif->lockp);
733 mhash_unset (&mm->if_index_by_key, &mif->key, &mif->if_index);
734 vec_free (mif->socket_filename);
735 vec_free (mif->ring_data);
737 memset (mif, 0, sizeof (*mif));
738 pool_put (mm->interfaces, mif);
742 memif_worker_thread_enable ()
744 /* if worker threads are enabled, switch to polling mode */
748 vlib_node_set_state (this_vlib_main,
749 memif_input_node.index,
750 VLIB_NODE_STATE_POLLING);
757 memif_worker_thread_disable ()
762 vlib_node_set_state (this_vlib_main,
763 memif_input_node.index,
764 VLIB_NODE_STATE_INTERRUPT);
771 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
773 memif_main_t *mm = &memif_main;
774 vlib_thread_main_t *tm = vlib_get_thread_main ();
775 vnet_main_t *vnm = vnet_get_main ();
777 vnet_sw_interface_t *sw;
778 clib_error_t *error = 0;
782 p = mhash_get (&mm->if_index_by_key, &args->key);
784 return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
786 pool_get (mm->interfaces, mif);
787 memset (mif, 0, sizeof (*mif));
788 mif->key = args->key;
789 mif->if_index = mif - mm->interfaces;
790 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
791 mif->listener_index = ~0;
792 mif->connection.index = mif->interrupt_line.index = ~0;
793 mif->connection.fd = mif->interrupt_line.fd = -1;
795 if (tm->n_vlib_mains > 1)
796 clib_spinlock_init (&mif->lockp);
798 if (!args->hw_addr_set)
800 f64 now = vlib_time_now (vm);
802 rnd = (u32) (now * 1e6);
803 rnd = random_u32 (&rnd);
805 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
806 args->hw_addr[0] = 2;
807 args->hw_addr[1] = 0xfe;
810 error = ethernet_register_interface (vnm, memif_device_class.index,
811 mif->if_index, args->hw_addr,
813 memif_eth_flag_change);
817 clib_error_report (error);
818 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
822 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
823 mif->sw_if_index = sw->sw_if_index;
825 mif->log2_ring_size = args->log2_ring_size;
826 mif->buffer_size = args->buffer_size;
828 /* TODO: make configurable */
829 mif->num_s2m_rings = 1;
830 mif->num_m2s_rings = 1;
832 mhash_set_mem (&mm->if_index_by_key, &args->key, &mif->if_index, 0);
834 if (args->socket_filename != 0)
835 mif->socket_filename = args->socket_filename;
837 mif->socket_filename = vec_dup (mm->default_socket_filename);
839 args->sw_if_index = mif->sw_if_index;
843 struct sockaddr_un un = { 0 };
844 struct stat file_stat;
846 memif_listener_t *listener = 0;
848 if (stat ((char *) mif->socket_filename, &file_stat) == 0)
850 if (!S_ISSOCK (file_stat.st_mode))
853 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
857 pool_foreach (listener, mm->listeners,
859 if (listener->sock_dev == file_stat.st_dev &&
860 listener->sock_ino == file_stat.st_ino)
862 /* attach memif to the existing listener */
863 mif->listener_index = listener->index;
864 ++listener->usage_counter;
869 unlink ((char *) mif->socket_filename);
872 pool_get (mm->listeners, listener);
873 memset (listener, 0, sizeof (*listener));
874 listener->socket.fd = -1;
875 listener->socket.index = ~0;
876 listener->index = listener - mm->listeners;
877 listener->usage_counter = 1;
879 if ((listener->socket.fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
881 ret = VNET_API_ERROR_SYSCALL_ERROR_3;
885 un.sun_family = AF_UNIX;
886 strncpy ((char *) un.sun_path, (char *) mif->socket_filename,
887 sizeof (un.sun_path) - 1);
889 if (setsockopt (listener->socket.fd, SOL_SOCKET, SO_PASSCRED,
890 &on, sizeof (on)) < 0)
892 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
895 if (bind (listener->socket.fd, (struct sockaddr *) &un,
898 ret = VNET_API_ERROR_SYSCALL_ERROR_5;
901 if (listen (listener->socket.fd, 1) == -1)
903 ret = VNET_API_ERROR_SYSCALL_ERROR_6;
907 if (stat ((char *) mif->socket_filename, &file_stat) == -1)
909 ret = VNET_API_ERROR_SYSCALL_ERROR_7;
913 listener->sock_dev = file_stat.st_dev;
914 listener->sock_ino = file_stat.st_ino;
916 unix_file_t template = { 0 };
917 template.read_function = memif_conn_fd_accept_ready;
918 template.file_descriptor = listener->socket.fd;
919 template.private_data = listener->index;
920 listener->socket.index = unix_file_add (&unix_main, &template);
922 mif->listener_index = listener->index;
926 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
930 /* use configured or generate random MAC address */
931 if (!args->hw_addr_set &&
932 tm->n_vlib_mains > 1 && pool_elts (mm->interfaces) == 1)
933 memif_worker_thread_enable ();
937 if (pool_elts (mm->interfaces) == 1)
939 vlib_process_signal_event (vm, memif_process_node.index,
940 MEMIF_PROCESS_EVENT_START, 0);
945 if (mif->hw_if_index != ~0)
947 ethernet_delete_interface (vnm, mif->hw_if_index);
948 mif->hw_if_index = ~0;
950 memif_close_if (mm, mif);
955 memif_delete_if (vlib_main_t * vm, u64 key)
957 vnet_main_t *vnm = vnet_get_main ();
958 memif_main_t *mm = &memif_main;
962 p = mhash_get (&mm->if_index_by_key, &key);
965 clib_warning ("Memory interface with key 0x%" PRIx64 " does not exist",
967 return VNET_API_ERROR_SYSCALL_ERROR_1;
969 mif = pool_elt_at_index (mm->interfaces, p[0]);
970 mif->flags |= MEMIF_IF_FLAG_DELETING;
972 /* bring down the interface */
973 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
974 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
976 /* remove the interface */
977 ethernet_delete_interface (vnm, mif->hw_if_index);
978 mif->hw_if_index = ~0;
979 memif_close_if (mm, mif);
981 if (pool_elts (mm->interfaces) == 0)
983 vlib_process_signal_event (vm, memif_process_node.index,
984 MEMIF_PROCESS_EVENT_STOP, 0);
988 if (tm->n_vlib_mains > 1 && pool_elts (mm->interfaces) == 0)
989 memif_worker_thread_disable ();
995 static clib_error_t *
996 memif_init (vlib_main_t * vm)
998 memif_main_t *mm = &memif_main;
999 vlib_thread_main_t *tm = vlib_get_thread_main ();
1000 vlib_thread_registration_t *tr;
1003 memset (mm, 0, sizeof (memif_main_t));
1005 mm->input_cpu_first_index = 0;
1006 mm->input_cpu_count = 1;
1008 /* initialize binary API */
1009 memif_plugin_api_hookup (vm);
1011 /* find out which cpus will be used for input */
1012 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
1013 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
1015 if (tr && tr->count > 0)
1017 mm->input_cpu_first_index = tr->first_index;
1018 mm->input_cpu_count = tr->count;
1021 mhash_init (&mm->if_index_by_key, sizeof (uword), sizeof (u64));
1023 vec_validate_aligned (mm->rx_buffers, tm->n_vlib_mains - 1,
1024 CLIB_CACHE_LINE_BYTES);
1026 /* set default socket filename */
1027 vec_validate (mm->default_socket_filename,
1028 strlen (MEMIF_DEFAULT_SOCKET_FILENAME));
1029 strncpy ((char *) mm->default_socket_filename,
1030 MEMIF_DEFAULT_SOCKET_FILENAME,
1031 vec_len (mm->default_socket_filename) - 1);
1036 VLIB_INIT_FUNCTION (memif_init);
1039 VLIB_PLUGIN_REGISTER () = {
1040 .version = VPP_BUILD_VER,
1041 .description = "Packet Memory Interface (experimetal)",
1046 * fd.io coding-style-patch-verification: ON
1049 * eval: (c-set-style "gnu")