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);
246 memif_connect (vm, mif);
249 resp.version = MEMIF_VERSION;
250 resp.type = MEMIF_MSG_TYPE_CONNECT_RESP;
251 resp.retval = retval;
252 if (send (fd, &resp, sizeof (resp), 0) < 0)
254 DEBUG_UNIX_LOG ("Failed to send connection response");
255 error = clib_error_return_unix (0, "send fd %d", fd);
257 memif_remove_pending_conn (pending_conn);
259 memif_disconnect (vm, mif);
271 static clib_error_t *
272 memif_process_connect_resp (memif_if_t * mif, memif_msg_t * resp)
274 vlib_main_t *vm = vlib_get_main ();
276 if ((mif->flags & MEMIF_IF_FLAG_IS_SLAVE) == 0)
278 DEBUG_LOG ("Memif master does not accept connection responses");
282 if ((mif->flags & MEMIF_IF_FLAG_CONNECTING) == 0)
284 DEBUG_LOG ("Unexpected connection response");
288 if (resp->retval == 0)
289 memif_connect (vm, mif);
291 memif_disconnect (vm, mif);
296 static clib_error_t *
297 memif_conn_fd_read_ready (unix_file_t * uf)
299 memif_main_t *mm = &memif_main;
300 vlib_main_t *vm = vlib_get_main ();
302 memif_pending_conn_t *pending_conn = 0;
303 int fd_array[2] = { -1, -1 };
304 char ctl[CMSG_SPACE (sizeof (fd_array)) +
305 CMSG_SPACE (sizeof (struct ucred))] = { 0 };
306 struct msghdr mh = { 0 };
308 struct ucred *cr = 0;
309 memif_msg_t msg = { 0 };
310 struct cmsghdr *cmsg;
312 static clib_error_t *error = 0;
314 iov[0].iov_base = (void *) &msg;
315 iov[0].iov_len = sizeof (memif_msg_t);
318 mh.msg_control = ctl;
319 mh.msg_controllen = sizeof (ctl);
321 /* grab the appropriate context */
322 if (uf->private_data & 1)
323 pending_conn = vec_elt_at_index (mm->pending_conns,
324 uf->private_data >> 1);
326 mif = vec_elt_at_index (mm->interfaces, uf->private_data >> 1);
328 /* receive the incoming message */
329 size = recvmsg (uf->file_descriptor, &mh, 0);
330 if (size != sizeof (memif_msg_t))
334 DEBUG_UNIX_LOG ("Malformed message received on fd %d",
335 uf->file_descriptor);
336 error = clib_error_return_unix (0, "recvmsg fd %d",
337 uf->file_descriptor);
342 /* check version of the sender's memif plugin */
343 if (msg.version != MEMIF_VERSION)
345 DEBUG_LOG ("Memif version mismatch");
349 /* process the message based on its type */
352 case MEMIF_MSG_TYPE_CONNECT_REQ:
353 if (pending_conn == 0)
355 DEBUG_LOG ("Received unexpected connection request");
359 /* Read anciliary data */
360 cmsg = CMSG_FIRSTHDR (&mh);
363 if (cmsg->cmsg_level == SOL_SOCKET
364 && cmsg->cmsg_type == SCM_CREDENTIALS)
366 cr = (struct ucred *) CMSG_DATA (cmsg);
368 else if (cmsg->cmsg_level == SOL_SOCKET
369 && cmsg->cmsg_type == SCM_RIGHTS)
371 clib_memcpy (fd_array, CMSG_DATA (cmsg), sizeof (fd_array));
373 cmsg = CMSG_NXTHDR (&mh, cmsg);
376 return memif_process_connect_req (pending_conn, &msg, cr,
377 fd_array[0], fd_array[1]);
379 case MEMIF_MSG_TYPE_CONNECT_RESP:
382 DEBUG_LOG ("Received unexpected connection response");
385 return memif_process_connect_resp (mif, &msg);
387 case MEMIF_MSG_TYPE_DISCONNECT:
391 DEBUG_LOG ("Received unknown message type");
399 memif_remove_pending_conn (pending_conn);
401 memif_disconnect (vm, mif);
405 static clib_error_t *
406 memif_int_fd_read_ready (unix_file_t * uf)
408 memif_main_t *mm = &memif_main;
409 vlib_main_t *vm = vlib_get_main ();
410 memif_if_t *mif = vec_elt_at_index (mm->interfaces, uf->private_data);
414 size = read (uf->file_descriptor, &b, sizeof (b));
417 /* interrupt line was disconnected */
418 unix_file_del (&unix_main,
419 unix_main.file_pool + mif->interrupt_line.index);
420 mif->interrupt_line.index = ~0;
421 mif->interrupt_line.fd = -1;
423 vlib_node_set_interrupt_pending (vm, memif_input_node.index);
427 static clib_error_t *
428 memif_conn_fd_accept_ready (unix_file_t * uf)
430 memif_main_t *mm = &memif_main;
431 memif_listener_t *listener = 0;
432 memif_pending_conn_t *pending_conn = 0;
434 struct sockaddr_un client;
436 unix_file_t template = { 0 };
438 listener = pool_elt_at_index (mm->listeners, uf->private_data);
440 addr_len = sizeof (client);
441 conn_fd = accept (uf->file_descriptor,
442 (struct sockaddr *) &client, (socklen_t *) & addr_len);
445 return clib_error_return_unix (0, "accept fd %d", uf->file_descriptor);
447 pool_get (mm->pending_conns, pending_conn);
448 pending_conn->index = pending_conn - mm->pending_conns;
449 pending_conn->listener_index = listener->index;
450 pending_conn->connection.fd = conn_fd;
452 template.read_function = memif_conn_fd_read_ready;
453 template.file_descriptor = conn_fd;
454 template.private_data = (pending_conn->index << 1) | 1;
455 pending_conn->connection.index = unix_file_add (&unix_main, &template);
461 memif_connect_master (vlib_main_t * vm, memif_if_t * mif)
464 struct msghdr mh = { 0 };
466 struct cmsghdr *cmsg;
469 int fd_array[2] = { -1, -1 };
470 char ctl[CMSG_SPACE (sizeof (fd_array))];
471 memif_ring_t *ring = NULL;
475 unix_file_t template = { 0 };
477 msg.version = MEMIF_VERSION;
478 msg.type = MEMIF_MSG_TYPE_CONNECT_REQ;
480 msg.log2_ring_size = mif->log2_ring_size;
481 msg.num_s2m_rings = mif->num_s2m_rings;
482 msg.num_m2s_rings = mif->num_m2s_rings;
483 msg.buffer_size = mif->buffer_size;
485 buffer_offset = sizeof (memif_shm_t) +
486 (mif->num_s2m_rings + mif->num_m2s_rings) *
487 (sizeof (memif_ring_t) +
488 sizeof (memif_desc_t) * (1 << mif->log2_ring_size));
490 msg.shared_mem_size = buffer_offset +
491 mif->buffer_size * (1 << mif->log2_ring_size) * (mif->num_s2m_rings +
494 if ((mfd = memfd_create ("shared mem", MFD_ALLOW_SEALING)) == -1)
496 DEBUG_LOG ("Failed to create anonymous file");
500 if ((fcntl (mfd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
502 DEBUG_UNIX_LOG ("Failed to seal an anonymous file off from truncating");
506 if ((ftruncate (mfd, msg.shared_mem_size)) == -1)
508 DEBUG_UNIX_LOG ("Failed to extend the size of an anonymous file");
512 if ((shm = mmap (NULL, msg.shared_mem_size, PROT_READ | PROT_WRITE,
513 MAP_SHARED, mfd, 0)) == MAP_FAILED)
515 DEBUG_UNIX_LOG ("Failed to map anonymous file into memory");
519 vec_add1 (mif->regions, shm);
520 ((memif_shm_t *) mif->regions[0])->cookie = 0xdeadbeef;
522 for (i = 0; i < mif->num_s2m_rings; i++)
524 ring = memif_get_ring (mif, MEMIF_RING_S2M, i);
525 ring->head = ring->tail = 0;
526 for (j = 0; j < (1 << mif->log2_ring_size); j++)
528 u16 slot = i * (1 << mif->log2_ring_size) + j;
529 ring->desc[j].region = 0;
530 ring->desc[j].offset =
531 buffer_offset + (u32) (slot * mif->buffer_size);
532 ring->desc[j].buffer_length = mif->buffer_size;
535 for (i = 0; i < mif->num_m2s_rings; i++)
537 ring = memif_get_ring (mif, MEMIF_RING_M2S, i);
538 ring->head = ring->tail = 0;
539 for (j = 0; j < (1 << mif->log2_ring_size); j++)
542 (i + mif->num_s2m_rings) * (1 << mif->log2_ring_size) + j;
543 ring->desc[j].region = 0;
544 ring->desc[j].offset =
545 buffer_offset + (u32) (slot * mif->buffer_size);
546 ring->desc[j].buffer_length = mif->buffer_size;
550 iov[0].iov_base = (void *) &msg;
551 iov[0].iov_len = sizeof (memif_msg_t);
555 /* create interrupt socket */
556 if (socketpair (AF_UNIX, SOCK_STREAM, 0, fd_array) < 0)
558 DEBUG_UNIX_LOG ("Failed to create a pair of connected sockets");
562 mif->interrupt_line.fd = fd_array[0];
563 template.read_function = memif_int_fd_read_ready;
564 template.file_descriptor = mif->interrupt_line.fd;
565 template.private_data = mif->if_index;
566 mif->interrupt_line.index = unix_file_add (&unix_main, &template);
568 memset (&ctl, 0, sizeof (ctl));
569 mh.msg_control = ctl;
570 mh.msg_controllen = sizeof (ctl);
571 cmsg = CMSG_FIRSTHDR (&mh);
572 cmsg->cmsg_len = CMSG_LEN (sizeof (fd_array));
573 cmsg->cmsg_level = SOL_SOCKET;
574 cmsg->cmsg_type = SCM_RIGHTS;
576 clib_memcpy (CMSG_DATA (cmsg), fd_array, sizeof (fd_array));
578 mif->flags |= MEMIF_IF_FLAG_CONNECTING;
579 rv = sendmsg (mif->connection.fd, &mh, 0);
582 DEBUG_UNIX_LOG ("Failed to send memif connection request");
586 /* No need to keep the descriptor open,
587 * mmap creates an extra reference to the underlying file */
590 /* This FD is given to peer, so we can close it */
598 if (fd_array[1] > -1)
600 memif_disconnect (vm, mif);
604 memif_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
606 memif_main_t *mm = &memif_main;
608 struct sockaddr_un sun;
610 uword *event_data = 0, event_type;
611 unix_file_t template = { 0 };
613 f64 start_time, last_run_duration = 0, now;
615 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
618 DEBUG_UNIX_LOG ("socket AF_UNIX");
621 sun.sun_family = AF_UNIX;
622 template.read_function = memif_conn_fd_read_ready;
627 vlib_process_wait_for_event_or_clock (vm,
628 (f64) 3 - last_run_duration);
630 vlib_process_wait_for_event (vm);
632 event_type = vlib_process_get_events (vm, &event_data);
633 vec_reset_length (event_data);
639 case MEMIF_PROCESS_EVENT_START:
642 case MEMIF_PROCESS_EVENT_STOP:
649 last_run_duration = start_time = vlib_time_now (vm);
651 pool_foreach (mif, mm->interfaces,
653 /* Allow no more than 10us without a pause */
654 now = vlib_time_now (vm);
655 if (now > start_time + 10e-6)
657 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
658 start_time = vlib_time_now (vm);
661 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) == 0)
664 if (mif->flags & MEMIF_IF_FLAG_CONNECTING)
667 if (mif->flags & MEMIF_IF_FLAG_CONNECTED)
670 if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
672 strncpy (sun.sun_path, (char *) mif->socket_filename,
673 sizeof (sun.sun_path) - 1);
676 (sockfd, (struct sockaddr *) &sun,
677 sizeof (struct sockaddr_un)) == 0)
679 mif->connection.fd = sockfd;
680 template.file_descriptor = sockfd;
681 template.private_data = mif->if_index << 1;
682 mif->connection.index = unix_file_add (&unix_main, &template);
683 memif_connect_master (vm, mif);
685 /* grab another fd */
686 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
689 DEBUG_UNIX_LOG ("socket AF_UNIX");
696 last_run_duration = vlib_time_now (vm) - last_run_duration;
702 VLIB_REGISTER_NODE (memif_process_node,static) = {
703 .function = memif_process,
704 .type = VLIB_NODE_TYPE_PROCESS,
705 .name = "memif-process",
710 memif_close_if (memif_main_t * mm, memif_if_t * mif)
712 vlib_main_t *vm = vlib_get_main ();
713 memif_listener_t *listener = 0;
714 memif_pending_conn_t *pending_conn = 0;
716 memif_disconnect (vm, mif);
718 if (mif->listener_index != (uword) ~ 0)
720 listener = pool_elt_at_index (mm->listeners, mif->listener_index);
721 if (--listener->usage_counter == 0)
723 /* not used anymore -> remove the socket and pending connections */
726 pool_foreach (pending_conn, mm->pending_conns,
728 if (pending_conn->listener_index == mif->listener_index)
730 memif_remove_pending_conn (pending_conn);
735 unix_file_del (&unix_main,
736 unix_main.file_pool + listener->socket.index);
737 pool_put (mm->listeners, listener);
738 unlink ((char *) mif->socket_filename);
742 clib_spinlock_free (&mif->lockp);
744 mhash_unset (&mm->if_index_by_key, &mif->key, &mif->if_index);
745 vec_free (mif->socket_filename);
746 vec_free (mif->ring_data);
748 memset (mif, 0, sizeof (*mif));
749 pool_put (mm->interfaces, mif);
753 memif_worker_thread_enable ()
755 /* if worker threads are enabled, switch to polling mode */
759 vlib_node_set_state (this_vlib_main,
760 memif_input_node.index,
761 VLIB_NODE_STATE_POLLING);
768 memif_worker_thread_disable ()
773 vlib_node_set_state (this_vlib_main,
774 memif_input_node.index,
775 VLIB_NODE_STATE_INTERRUPT);
782 memif_create_if (vlib_main_t * vm, memif_create_if_args_t * args)
784 memif_main_t *mm = &memif_main;
785 vlib_thread_main_t *tm = vlib_get_thread_main ();
786 vnet_main_t *vnm = vnet_get_main ();
788 vnet_sw_interface_t *sw;
789 clib_error_t *error = 0;
793 p = mhash_get (&mm->if_index_by_key, &args->key);
795 return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
797 pool_get (mm->interfaces, mif);
798 memset (mif, 0, sizeof (*mif));
799 mif->key = args->key;
800 mif->if_index = mif - mm->interfaces;
801 mif->sw_if_index = mif->hw_if_index = mif->per_interface_next_index = ~0;
802 mif->listener_index = ~0;
803 mif->connection.index = mif->interrupt_line.index = ~0;
804 mif->connection.fd = mif->interrupt_line.fd = -1;
806 if (tm->n_vlib_mains > 1)
807 clib_spinlock_init (&mif->lockp);
809 if (!args->hw_addr_set)
811 f64 now = vlib_time_now (vm);
813 rnd = (u32) (now * 1e6);
814 rnd = random_u32 (&rnd);
816 memcpy (args->hw_addr + 2, &rnd, sizeof (rnd));
817 args->hw_addr[0] = 2;
818 args->hw_addr[1] = 0xfe;
821 error = ethernet_register_interface (vnm, memif_device_class.index,
822 mif->if_index, args->hw_addr,
824 memif_eth_flag_change);
828 clib_error_report (error);
829 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
833 sw = vnet_get_hw_sw_interface (vnm, mif->hw_if_index);
834 mif->sw_if_index = sw->sw_if_index;
836 mif->log2_ring_size = args->log2_ring_size;
837 mif->buffer_size = args->buffer_size;
839 /* TODO: make configurable */
840 mif->num_s2m_rings = 1;
841 mif->num_m2s_rings = 1;
843 mhash_set_mem (&mm->if_index_by_key, &args->key, &mif->if_index, 0);
845 if (args->socket_filename != 0)
846 mif->socket_filename = args->socket_filename;
848 mif->socket_filename = vec_dup (mm->default_socket_filename);
850 args->sw_if_index = mif->sw_if_index;
854 struct sockaddr_un un = { 0 };
855 struct stat file_stat;
857 memif_listener_t *listener = 0;
859 if (stat ((char *) mif->socket_filename, &file_stat) == 0)
861 if (!S_ISSOCK (file_stat.st_mode))
864 ret = VNET_API_ERROR_SYSCALL_ERROR_2;
868 pool_foreach (listener, mm->listeners,
870 if (listener->sock_dev == file_stat.st_dev &&
871 listener->sock_ino == file_stat.st_ino)
873 /* attach memif to the existing listener */
874 mif->listener_index = listener->index;
875 ++listener->usage_counter;
880 unlink ((char *) mif->socket_filename);
883 pool_get (mm->listeners, listener);
884 memset (listener, 0, sizeof (*listener));
885 listener->socket.fd = -1;
886 listener->socket.index = ~0;
887 listener->index = listener - mm->listeners;
888 listener->usage_counter = 1;
890 if ((listener->socket.fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
892 ret = VNET_API_ERROR_SYSCALL_ERROR_3;
896 un.sun_family = AF_UNIX;
897 strncpy ((char *) un.sun_path, (char *) mif->socket_filename,
898 sizeof (un.sun_path) - 1);
900 if (setsockopt (listener->socket.fd, SOL_SOCKET, SO_PASSCRED,
901 &on, sizeof (on)) < 0)
903 ret = VNET_API_ERROR_SYSCALL_ERROR_4;
906 if (bind (listener->socket.fd, (struct sockaddr *) &un,
909 ret = VNET_API_ERROR_SYSCALL_ERROR_5;
912 if (listen (listener->socket.fd, 1) == -1)
914 ret = VNET_API_ERROR_SYSCALL_ERROR_6;
918 if (stat ((char *) mif->socket_filename, &file_stat) == -1)
920 ret = VNET_API_ERROR_SYSCALL_ERROR_7;
924 listener->sock_dev = file_stat.st_dev;
925 listener->sock_ino = file_stat.st_ino;
927 unix_file_t template = { 0 };
928 template.read_function = memif_conn_fd_accept_ready;
929 template.file_descriptor = listener->socket.fd;
930 template.private_data = listener->index;
931 listener->socket.index = unix_file_add (&unix_main, &template);
933 mif->listener_index = listener->index;
937 mif->flags |= MEMIF_IF_FLAG_IS_SLAVE;
941 /* use configured or generate random MAC address */
942 if (!args->hw_addr_set &&
943 tm->n_vlib_mains > 1 && pool_elts (mm->interfaces) == 1)
944 memif_worker_thread_enable ();
948 if (pool_elts (mm->interfaces) == 1)
950 vlib_process_signal_event (vm, memif_process_node.index,
951 MEMIF_PROCESS_EVENT_START, 0);
956 if (mif->hw_if_index != ~0)
958 ethernet_delete_interface (vnm, mif->hw_if_index);
959 mif->hw_if_index = ~0;
961 memif_close_if (mm, mif);
966 memif_delete_if (vlib_main_t * vm, u64 key)
968 vnet_main_t *vnm = vnet_get_main ();
969 memif_main_t *mm = &memif_main;
973 p = mhash_get (&mm->if_index_by_key, &key);
976 clib_warning ("Memory interface with key 0x%" PRIx64 " does not exist",
978 return VNET_API_ERROR_SYSCALL_ERROR_1;
980 mif = pool_elt_at_index (mm->interfaces, p[0]);
981 mif->flags |= MEMIF_IF_FLAG_DELETING;
983 /* bring down the interface */
984 vnet_hw_interface_set_flags (vnm, mif->hw_if_index, 0);
985 vnet_sw_interface_set_flags (vnm, mif->sw_if_index, 0);
987 /* remove the interface */
988 ethernet_delete_interface (vnm, mif->hw_if_index);
989 mif->hw_if_index = ~0;
990 memif_close_if (mm, mif);
992 if (pool_elts (mm->interfaces) == 0)
994 vlib_process_signal_event (vm, memif_process_node.index,
995 MEMIF_PROCESS_EVENT_STOP, 0);
999 if (tm->n_vlib_mains > 1 && pool_elts (mm->interfaces) == 0)
1000 memif_worker_thread_disable ();
1006 static clib_error_t *
1007 memif_init (vlib_main_t * vm)
1009 memif_main_t *mm = &memif_main;
1010 vlib_thread_main_t *tm = vlib_get_thread_main ();
1011 vlib_thread_registration_t *tr;
1014 memset (mm, 0, sizeof (memif_main_t));
1016 mm->input_cpu_first_index = 0;
1017 mm->input_cpu_count = 1;
1019 /* initialize binary API */
1020 memif_plugin_api_hookup (vm);
1022 /* find out which cpus will be used for input */
1023 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
1024 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
1026 if (tr && tr->count > 0)
1028 mm->input_cpu_first_index = tr->first_index;
1029 mm->input_cpu_count = tr->count;
1032 mhash_init (&mm->if_index_by_key, sizeof (uword), sizeof (u64));
1034 vec_validate_aligned (mm->rx_buffers, tm->n_vlib_mains - 1,
1035 CLIB_CACHE_LINE_BYTES);
1037 /* set default socket filename */
1038 vec_validate (mm->default_socket_filename,
1039 strlen (MEMIF_DEFAULT_SOCKET_FILENAME));
1040 strncpy ((char *) mm->default_socket_filename,
1041 MEMIF_DEFAULT_SOCKET_FILENAME,
1042 vec_len (mm->default_socket_filename) - 1);
1047 VLIB_INIT_FUNCTION (memif_init);
1050 VLIB_PLUGIN_REGISTER () = {
1051 .version = VPP_BUILD_VER,
1052 .description = "Packet Memory Interface (experimetal)",
1057 * fd.io coding-style-patch-verification: ON
1060 * eval: (c-set-style "gnu")