2 *------------------------------------------------------------------
5 * Copyright (c) 2014 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
20 #include <fcntl.h> /* for open */
21 #include <sys/ioctl.h>
22 #include <sys/socket.h>
25 #include <sys/types.h>
26 #include <sys/uio.h> /* for iovec */
27 #include <netinet/in.h>
30 #include <linux/if_arp.h>
31 #include <linux/if_tun.h>
33 #include <vlib/vlib.h>
34 #include <vlib/unix/unix.h>
36 #include <vnet/ip/ip.h>
38 #include <vnet/ethernet/ethernet.h>
40 #include <vnet/devices/virtio/vhost-user.h>
42 #define VHOST_USER_DEBUG_SOCKET 0
43 #define VHOST_USER_DEBUG_VQ 0
45 /* Set to get virtio_net_hdr in buffer pre-data
46 details will be shown in packet trace */
47 #define VHOST_USER_COPY_TX_HDR 0
49 #if VHOST_USER_DEBUG_SOCKET == 1
50 #define DBG_SOCK(args...) clib_warning(args);
52 #define DBG_SOCK(args...)
55 #if VHOST_USER_DEBUG_VQ == 1
56 #define DBG_VQ(args...) clib_warning(args);
58 #define DBG_VQ(args...)
61 vlib_node_registration_t vhost_user_input_node;
63 #define foreach_vhost_user_tx_func_error \
65 _(NOT_READY, "vhost user state error") \
66 _(PKT_DROP_NOBUF, "tx packet drops (no available descriptors)") \
67 _(PKT_DROP_NOMRG, "tx packet drops (cannot merge descriptors)") \
68 _(MMAP_FAIL, "mmap failure") \
69 _(INDIRECT_OVERFLOW, "indirect descriptor table overflow")
73 #define _(f,s) VHOST_USER_TX_FUNC_ERROR_##f,
74 foreach_vhost_user_tx_func_error
76 VHOST_USER_TX_FUNC_N_ERROR,
77 } vhost_user_tx_func_error_t;
79 static char *vhost_user_tx_func_error_strings[] = {
81 foreach_vhost_user_tx_func_error
85 #define foreach_vhost_user_input_func_error \
86 _(NO_ERROR, "no error") \
87 _(NO_BUFFER, "no available buffer") \
88 _(MMAP_FAIL, "mmap failure") \
89 _(INDIRECT_OVERFLOW, "indirect descriptor overflows table") \
90 _(UNDERSIZED_FRAME, "undersized ethernet frame received (< 14 bytes)") \
91 _(FULL_RX_QUEUE, "full rx queue (possible driver tx drop)")
95 #define _(f,s) VHOST_USER_INPUT_FUNC_ERROR_##f,
96 foreach_vhost_user_input_func_error
98 VHOST_USER_INPUT_FUNC_N_ERROR,
99 } vhost_user_input_func_error_t;
101 static char *vhost_user_input_func_error_strings[] = {
103 foreach_vhost_user_input_func_error
108 static vhost_user_main_t vhost_user_main = {
112 VNET_HW_INTERFACE_CLASS (vhost_interface_class, static) = {
113 .name = "vhost-user",
118 format_vhost_user_interface_name (u8 * s, va_list * args)
120 u32 i = va_arg (*args, u32);
121 u32 show_dev_instance = ~0;
122 vhost_user_main_t *vum = &vhost_user_main;
124 if (i < vec_len (vum->show_dev_instance_by_real_dev_instance))
125 show_dev_instance = vum->show_dev_instance_by_real_dev_instance[i];
127 if (show_dev_instance != ~0)
128 i = show_dev_instance;
130 s = format (s, "VirtualEthernet0/0/%d", i);
135 vhost_user_name_renumber (vnet_hw_interface_t * hi, u32 new_dev_instance)
137 vhost_user_main_t *vum = &vhost_user_main;
139 vec_validate_init_empty (vum->show_dev_instance_by_real_dev_instance,
140 hi->dev_instance, ~0);
142 vum->show_dev_instance_by_real_dev_instance[hi->dev_instance] =
145 DBG_SOCK ("renumbered vhost-user interface dev_instance %d to %d",
146 hi->dev_instance, new_dev_instance);
153 map_guest_mem (vhost_user_intf_t * vui, uword addr)
156 for (i = 0; i < vui->nregions; i++)
158 if ((vui->regions[i].guest_phys_addr <= addr) &&
159 ((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
162 return (void *) (vui->region_mmap_addr[i] + addr -
163 vui->regions[i].guest_phys_addr);
166 DBG_VQ ("failed to map guest mem addr %llx", addr);
171 map_user_mem (vhost_user_intf_t * vui, uword addr)
174 for (i = 0; i < vui->nregions; i++)
176 if ((vui->regions[i].userspace_addr <= addr) &&
177 ((vui->regions[i].userspace_addr + vui->regions[i].memory_size) >
180 return (void *) (vui->region_mmap_addr[i] + addr -
181 vui->regions[i].userspace_addr);
188 get_huge_page_size (int fd)
196 unmap_all_mem_regions (vhost_user_intf_t * vui)
199 for (i = 0; i < vui->nregions; i++)
201 if (vui->region_mmap_addr[i] != (void *) -1)
204 long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
206 ssize_t map_sz = (vui->regions[i].memory_size +
207 vui->regions[i].mmap_offset +
208 page_sz) & ~(page_sz - 1);
211 munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
215 ("unmap memory region %d addr 0x%lx len 0x%lx page_sz 0x%x", i,
216 vui->region_mmap_addr[i], map_sz, page_sz);
218 vui->region_mmap_addr[i] = (void *) -1;
222 clib_warning ("failed to unmap memory region (errno %d)",
225 close (vui->region_mmap_fd[i]);
232 static clib_error_t *
233 vhost_user_callfd_read_ready (unix_file_t * uf)
235 __attribute__ ((unused)) int n;
237 n = read (uf->file_descriptor, ((char *) &buff), 8);
242 vhost_user_if_disconnect (vhost_user_intf_t * vui)
244 vhost_user_main_t *vum = &vhost_user_main;
245 vnet_main_t *vnm = vnet_get_main ();
248 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
250 if (vui->unix_file_index != ~0)
252 unix_file_del (&unix_main, unix_main.file_pool + vui->unix_file_index);
253 vui->unix_file_index = ~0;
256 hash_unset (vum->vhost_user_interface_index_by_sock_fd, vui->unix_fd);
257 hash_unset (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd);
258 close (vui->unix_fd);
261 for (q = 0; q < vui->num_vrings; q++)
263 vui->vrings[q].desc = NULL;
264 vui->vrings[q].avail = NULL;
265 vui->vrings[q].used = NULL;
266 vui->vrings[q].log_guest_addr = 0;
267 vui->vrings[q].log_used = 0;
270 unmap_all_mem_regions (vui);
271 DBG_SOCK ("interface ifindex %d disconnected", vui->sw_if_index);
274 #define VHOST_LOG_PAGE 0x1000
276 vhost_user_log_dirty_pages (vhost_user_intf_t * vui, u64 addr, u64 len)
278 if (PREDICT_TRUE (vui->log_base_addr == 0
279 || !(vui->features & (1 << FEAT_VHOST_F_LOG_ALL))))
283 if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
285 DBG_SOCK ("vhost_user_log_dirty_pages(): out of range\n");
289 CLIB_MEMORY_BARRIER ();
290 u64 page = addr / VHOST_LOG_PAGE;
291 while (page * VHOST_LOG_PAGE < addr + len)
293 ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
298 #define vhost_user_log_dirty_ring(vui, vq, member) \
299 if (PREDICT_FALSE(vq->log_used)) { \
300 vhost_user_log_dirty_pages(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
301 sizeof(vq->used->member)); \
304 static clib_error_t *
305 vhost_user_socket_read (unix_file_t * uf)
308 int fd, number_of_fds = 0;
309 int fds[VHOST_MEMORY_MAX_NREGIONS];
310 vhost_user_msg_t msg;
313 vhost_user_main_t *vum = &vhost_user_main;
314 vhost_user_intf_t *vui;
315 struct cmsghdr *cmsg;
318 unix_file_t template = { 0 };
319 vnet_main_t *vnm = vnet_get_main ();
321 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
322 uf->file_descriptor);
325 DBG_SOCK ("FD %d doesn't belong to any interface", uf->file_descriptor);
329 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
331 char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
333 memset (&mh, 0, sizeof (mh));
334 memset (control, 0, sizeof (control));
336 for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
339 /* set the payload */
340 iov[0].iov_base = (void *) &msg;
341 iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
345 mh.msg_control = control;
346 mh.msg_controllen = sizeof (control);
348 n = recvmsg (uf->file_descriptor, &mh, 0);
350 if (n != VHOST_USER_MSG_HDR_SZ)
353 if (mh.msg_flags & MSG_CTRUNC)
358 cmsg = CMSG_FIRSTHDR (&mh);
360 if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
361 (cmsg->cmsg_type == SCM_RIGHTS) &&
362 (cmsg->cmsg_len - CMSG_LEN (0) <=
363 VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
365 number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
366 clib_memcpy (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
369 /* version 1, no reply bit set */
370 if ((msg.flags & 7) != 1)
372 DBG_SOCK ("malformed message received. closing socket");
377 int rv __attribute__ ((unused));
378 /* $$$$ pay attention to rv */
379 rv = read (uf->file_descriptor, ((char *) &msg) + n, msg.size);
384 case VHOST_USER_GET_FEATURES:
385 DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES", vui->hw_if_index);
388 msg.u64 = (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
389 (1 << FEAT_VIRTIO_F_ANY_LAYOUT) |
390 (1 << FEAT_VIRTIO_F_INDIRECT_DESC) |
391 (1 << FEAT_VHOST_F_LOG_ALL) |
392 (1 << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
393 (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES);
394 msg.u64 &= vui->feature_mask;
396 msg.size = sizeof (msg.u64);
399 case VHOST_USER_SET_FEATURES:
400 DBG_SOCK ("if %d msg VHOST_USER_SET_FEATURES features 0x%016llx",
401 vui->hw_if_index, msg.u64);
403 vui->features = msg.u64;
405 if (vui->features & (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF))
406 vui->virtio_net_hdr_sz = 12;
408 vui->virtio_net_hdr_sz = 10;
411 (vui->features & (1 << FEAT_VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
413 ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
414 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
417 for (q = 0; q < 2; q++)
419 vui->vrings[q].desc = 0;
420 vui->vrings[q].avail = 0;
421 vui->vrings[q].used = 0;
422 vui->vrings[q].log_guest_addr = 0;
423 vui->vrings[q].log_used = 0;
426 DBG_SOCK ("interface %d disconnected", vui->sw_if_index);
430 case VHOST_USER_SET_MEM_TABLE:
431 DBG_SOCK ("if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
432 vui->hw_if_index, msg.memory.nregions);
434 if ((msg.memory.nregions < 1) ||
435 (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
438 DBG_SOCK ("number of mem regions must be between 1 and %i",
439 VHOST_MEMORY_MAX_NREGIONS);
444 if (msg.memory.nregions != number_of_fds)
446 DBG_SOCK ("each memory region must have FD");
449 unmap_all_mem_regions (vui);
450 for (i = 0; i < msg.memory.nregions; i++)
452 clib_memcpy (&(vui->regions[i]), &msg.memory.regions[i],
453 sizeof (vhost_user_memory_region_t));
455 long page_sz = get_huge_page_size (fds[i]);
457 /* align size to 2M page */
458 ssize_t map_sz = (vui->regions[i].memory_size +
459 vui->regions[i].mmap_offset +
460 page_sz) & ~(page_sz - 1);
462 vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
463 MAP_SHARED, fds[i], 0);
466 ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
467 "page_sz 0x%x", i, map_sz, fds[i], vui->region_mmap_addr[i],
470 if (vui->region_mmap_addr[i] == MAP_FAILED)
472 clib_warning ("failed to map memory. errno is %d", errno);
475 vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
476 vui->region_mmap_fd[i] = fds[i];
478 vui->nregions = msg.memory.nregions;
481 case VHOST_USER_SET_VRING_NUM:
482 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
483 vui->hw_if_index, msg.state.index, msg.state.num);
485 if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
486 (msg.state.num == 0) || /* it cannot be zero */
487 (msg.state.num % 2)) /* must be power of 2 */
489 vui->vrings[msg.state.index].qsz = msg.state.num;
492 case VHOST_USER_SET_VRING_ADDR:
493 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
494 vui->hw_if_index, msg.state.index);
496 vui->vrings[msg.state.index].desc = (vring_desc_t *)
497 map_user_mem (vui, msg.addr.desc_user_addr);
498 vui->vrings[msg.state.index].used = (vring_used_t *)
499 map_user_mem (vui, msg.addr.used_user_addr);
500 vui->vrings[msg.state.index].avail = (vring_avail_t *)
501 map_user_mem (vui, msg.addr.avail_user_addr);
503 if ((vui->vrings[msg.state.index].desc == NULL) ||
504 (vui->vrings[msg.state.index].used == NULL) ||
505 (vui->vrings[msg.state.index].avail == NULL))
507 DBG_SOCK ("failed to map user memory for hw_if_index %d",
512 vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
513 vui->vrings[msg.state.index].log_used =
514 (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
516 /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
517 the ring is initialized in an enabled state. */
519 if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
521 vui->vrings[msg.state.index].enabled = 1;
524 vui->vrings[msg.state.index].last_used_idx =
525 vui->vrings[msg.state.index].used->idx;
527 /* tell driver that we don't want interrupts */
528 vui->vrings[msg.state.index].used->flags |= 1;
531 case VHOST_USER_SET_OWNER:
532 DBG_SOCK ("if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
535 case VHOST_USER_RESET_OWNER:
536 DBG_SOCK ("if %d msg VHOST_USER_RESET_OWNER", vui->hw_if_index);
539 case VHOST_USER_SET_VRING_CALL:
540 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_CALL u64 %d",
541 vui->hw_if_index, msg.u64);
543 q = (u8) (msg.u64 & 0xFF);
545 if (!(msg.u64 & 0x100))
547 if (number_of_fds != 1)
550 /* if there is old fd, delete it */
551 if (vui->vrings[q].callfd)
553 unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
554 vui->vrings[q].callfd_idx);
555 unix_file_del (&unix_main, uf);
557 vui->vrings[q].callfd = fds[0];
558 template.read_function = vhost_user_callfd_read_ready;
559 template.file_descriptor = fds[0];
560 vui->vrings[q].callfd_idx = unix_file_add (&unix_main, &template);
563 vui->vrings[q].callfd = -1;
566 case VHOST_USER_SET_VRING_KICK:
567 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_KICK u64 %d",
568 vui->hw_if_index, msg.u64);
570 q = (u8) (msg.u64 & 0xFF);
572 if (!(msg.u64 & 0x100))
574 if (number_of_fds != 1)
577 vui->vrings[q].kickfd = fds[0];
580 vui->vrings[q].kickfd = -1;
583 case VHOST_USER_SET_VRING_ERR:
584 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ERR u64 %d",
585 vui->hw_if_index, msg.u64);
587 q = (u8) (msg.u64 & 0xFF);
589 if (!(msg.u64 & 0x100))
591 if (number_of_fds != 1)
599 vui->vrings[q].errfd = fd;
602 case VHOST_USER_SET_VRING_BASE:
603 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
604 vui->hw_if_index, msg.state.index, msg.state.num);
606 vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
609 case VHOST_USER_GET_VRING_BASE:
610 DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
611 vui->hw_if_index, msg.state.index, msg.state.num);
613 /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
614 vui->vrings[msg.state.index].enabled = 0;
616 msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
618 msg.size = sizeof (msg.state);
621 case VHOST_USER_NONE:
622 DBG_SOCK ("if %d msg VHOST_USER_NONE", vui->hw_if_index);
626 case VHOST_USER_SET_LOG_BASE:
628 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_BASE", vui->hw_if_index);
630 if (msg.size != sizeof (msg.log))
633 ("invalid msg size for VHOST_USER_SET_LOG_BASE: %d instead of %d",
634 msg.size, sizeof (msg.log));
639 (vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
642 ("VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but VHOST_USER_SET_LOG_BASE received");
647 /* align size to 2M page */
648 long page_sz = get_huge_page_size (fd);
650 (msg.log.size + msg.log.offset + page_sz) & ~(page_sz - 1);
652 vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
656 ("map log region addr 0 len 0x%lx off 0x%lx fd %d mapped 0x%lx",
657 map_sz, msg.log.offset, fd, vui->log_base_addr);
659 if (vui->log_base_addr == MAP_FAILED)
661 clib_warning ("failed to map memory. errno is %d", errno);
665 vui->log_base_addr += msg.log.offset;
666 vui->log_size = msg.log.size;
669 msg.size = sizeof (msg.u64);
674 case VHOST_USER_SET_LOG_FD:
675 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
679 case VHOST_USER_GET_PROTOCOL_FEATURES:
680 DBG_SOCK ("if %d msg VHOST_USER_GET_PROTOCOL_FEATURES",
684 msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD);
685 msg.size = sizeof (msg.u64);
688 case VHOST_USER_SET_PROTOCOL_FEATURES:
689 DBG_SOCK ("if %d msg VHOST_USER_SET_PROTOCOL_FEATURES features 0x%lx",
690 vui->hw_if_index, msg.u64);
692 vui->protocol_features = msg.u64;
696 case VHOST_USER_SET_VRING_ENABLE:
697 DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE, enable: %d",
698 vui->hw_if_index, msg.state.num);
699 vui->vrings[msg.state.index].enabled = msg.state.num;
703 DBG_SOCK ("unknown vhost-user message %d received. closing socket",
708 /* if we have pointers to descriptor table, go up */
710 vui->vrings[VHOST_NET_VRING_IDX_TX].desc &&
711 vui->vrings[VHOST_NET_VRING_IDX_RX].desc)
714 DBG_SOCK ("interface %d connected", vui->sw_if_index);
716 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
717 VNET_HW_INTERFACE_FLAG_LINK_UP);
722 /* if we need to reply */
726 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
727 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
734 vhost_user_if_disconnect (vui);
738 static clib_error_t *
739 vhost_user_socket_error (unix_file_t * uf)
741 vhost_user_main_t *vum = &vhost_user_main;
742 vhost_user_intf_t *vui;
745 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
746 uf->file_descriptor);
749 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
753 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
755 vhost_user_if_disconnect (vui);
759 static clib_error_t *
760 vhost_user_socksvr_accept_ready (unix_file_t * uf)
762 int client_fd, client_len;
763 struct sockaddr_un client;
764 unix_file_t template = { 0 };
765 vhost_user_main_t *vum = &vhost_user_main;
766 vhost_user_intf_t *vui;
769 p = hash_get (vum->vhost_user_interface_index_by_listener_fd,
770 uf->file_descriptor);
773 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
777 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
779 client_len = sizeof (client);
780 client_fd = accept (uf->file_descriptor,
781 (struct sockaddr *) &client,
782 (socklen_t *) & client_len);
785 return clib_error_return_unix (0, "accept");
787 template.read_function = vhost_user_socket_read;
788 template.error_function = vhost_user_socket_error;
789 template.file_descriptor = client_fd;
790 vui->unix_file_index = unix_file_add (&unix_main, &template);
792 vui->client_fd = client_fd;
793 hash_set (vum->vhost_user_interface_index_by_sock_fd, vui->client_fd,
794 vui - vum->vhost_user_interfaces);
799 static clib_error_t *
800 vhost_user_init (vlib_main_t * vm)
803 vhost_user_main_t *vum = &vhost_user_main;
804 vlib_thread_main_t *tm = vlib_get_thread_main ();
806 error = vlib_call_init_function (vm, ip4_init);
810 vum->vhost_user_interface_index_by_listener_fd =
811 hash_create (0, sizeof (uword));
812 vum->vhost_user_interface_index_by_sock_fd =
813 hash_create (0, sizeof (uword));
814 vum->vhost_user_interface_index_by_sw_if_index =
815 hash_create (0, sizeof (uword));
816 vum->coalesce_frames = 32;
817 vum->coalesce_time = 1e-3;
819 vec_validate_aligned (vum->rx_buffers, tm->n_vlib_mains - 1,
820 CLIB_CACHE_LINE_BYTES);
825 VLIB_INIT_FUNCTION (vhost_user_init);
827 static clib_error_t *
828 vhost_user_exit (vlib_main_t * vm)
834 VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
838 VHOST_USER_RX_NEXT_ETHERNET_INPUT,
839 VHOST_USER_RX_NEXT_DROP,
840 VHOST_USER_RX_N_NEXT,
848 #if VHOST_USER_COPY_TX_HDR == 1
849 virtio_net_hdr_t hdr;
851 } vhost_user_input_trace_t;
854 format_vhost_user_input_trace (u8 * s, va_list * va)
856 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
857 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
858 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
859 vhost_user_main_t *vum = &vhost_user_main;
860 vhost_user_input_trace_t *t = va_arg (*va, vhost_user_input_trace_t *);
861 vhost_user_intf_t *vui = vec_elt_at_index (vum->vhost_user_interfaces,
864 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
866 #if VHOST_USER_COPY_TX_HDR == 1
867 uword indent = format_get_indent (s);
870 s = format (s, "%U virtqueue %d",
871 format_vnet_sw_interface_name, vnm, sw, t->virtqueue);
873 #if VHOST_USER_COPY_TX_HDR == 1
874 s = format (s, "\n%Uvirtio_net_hdr flags 0x%02x gso_type %u hdr_len %u",
875 format_white_space, indent,
876 t->hdr.flags, t->hdr.gso_type, t->hdr.hdr_len);
883 vhost_user_rx_trace (vlib_main_t * vm,
884 vlib_node_runtime_t * node,
885 vhost_user_intf_t * vui, i16 virtqueue)
888 vhost_user_main_t *vum = &vhost_user_main;
890 u32 next_index = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
892 n_left = vec_len (vui->d_trace_buffers);
893 b = vui->d_trace_buffers;
899 vhost_user_input_trace_t *t0;
904 b0 = vlib_get_buffer (vm, bi0);
905 vlib_trace_buffer (vm, node, next_index, b0, /* follow_chain */ 0);
906 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
907 t0->virtqueue = virtqueue;
908 t0->device_index = vui - vum->vhost_user_interfaces;
909 #if VHOST_USER_COPY_TX_HDR == 1
910 clib_memcpy (&t0->hdr, b0->pre_data, sizeof (virtio_net_hdr_t));
918 vhost_user_send_call (vlib_main_t * vm, vhost_user_vring_t * vq)
920 vhost_user_main_t *vum = &vhost_user_main;
922 int rv __attribute__ ((unused));
923 /* $$$$ pay attention to rv */
924 rv = write (vq->callfd, &x, sizeof (x));
925 vq->n_since_last_int = 0;
926 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
931 vhost_user_if_input (vlib_main_t * vm,
932 vhost_user_main_t * vum,
933 vhost_user_intf_t * vui, vlib_node_runtime_t * node)
935 vhost_user_vring_t *txvq = &vui->vrings[VHOST_NET_VRING_IDX_TX];
936 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
937 uword n_rx_packets = 0, n_rx_bytes = 0;
939 u32 n_left_to_next, *to_next;
942 uword n_trace = vlib_get_trace_count (vm, node);
944 u32 cpu_index, rx_len, drops, flush;
945 f64 now = vlib_time_now (vm);
947 vec_reset_length (vui->d_trace_buffers);
949 /* no descriptor ptr - bail out */
950 if (PREDICT_FALSE (!txvq->desc || !txvq->avail || !txvq->enabled))
953 /* do we have pending intterupts ? */
954 if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
955 vhost_user_send_call (vm, txvq);
957 if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
958 vhost_user_send_call (vm, rxvq);
960 /* only bit 0 of avail.flags is used so we don't want to deal with this
961 interface if any other bit is set */
962 if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
965 n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
968 if (PREDICT_FALSE (n_left == 0))
971 if (PREDICT_FALSE (n_left == txvq->qsz))
973 //Informational error logging when VPP is not receiving packets fast enough
974 vlib_error_count (vm, node->node_index,
975 VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
978 if (PREDICT_FALSE (!vui->admin_up))
980 /* if intf is admin down, just drop all packets waiting in the ring */
981 txvq->last_avail_idx = txvq->last_used_idx = txvq->avail->idx;
982 CLIB_MEMORY_BARRIER ();
983 txvq->used->idx = txvq->last_used_idx;
984 vhost_user_log_dirty_ring (vui, txvq, idx);
985 vhost_user_send_call (vm, txvq);
989 qsz_mask = txvq->qsz - 1;
990 cpu_index = os_get_cpu_number ();
994 if (n_left > VLIB_FRAME_SIZE)
995 n_left = VLIB_FRAME_SIZE;
997 /* Allocate some buffers.
998 * Note that buffers that are chained for jumbo
999 * frames are allocated separately using a slower path.
1000 * The idea is to be certain to have enough buffers at least
1001 * to cycle through the descriptors without having to check for errors.
1002 * For jumbo frames, the bottleneck is memory copy anyway.
1004 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1006 vec_alloc (vum->rx_buffers[cpu_index], 2 * VLIB_FRAME_SIZE);
1008 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1009 flush = n_left; //Drop all input
1012 if (PREDICT_FALSE (_vec_len (vum->rx_buffers[cpu_index]) < n_left))
1014 u32 curr_len = _vec_len (vum->rx_buffers[cpu_index]);
1015 _vec_len (vum->rx_buffers[cpu_index]) +=
1016 vlib_buffer_alloc_from_free_list (vm,
1017 vum->rx_buffers[cpu_index] +
1019 2 * VLIB_FRAME_SIZE - curr_len,
1020 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
1022 if (PREDICT_FALSE (n_left > _vec_len (vum->rx_buffers[cpu_index])))
1023 flush = n_left - _vec_len (vum->rx_buffers[cpu_index]);
1026 if (PREDICT_FALSE (flush))
1028 //Remove some input buffers
1031 vlib_error_count (vm, vhost_user_input_node.index,
1032 VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
1035 u16 desc_chain_head =
1036 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1037 txvq->last_avail_idx++;
1038 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1040 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1041 vhost_user_log_dirty_ring (vui, txvq,
1042 ring[txvq->last_used_idx & qsz_mask]);
1043 txvq->last_used_idx++;
1048 rx_len = vec_len (vum->rx_buffers[cpu_index]); //vector might be null
1051 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1053 while (n_left > 0 && n_left_to_next > 0)
1055 vlib_buffer_t *b_head, *b_current;
1056 u32 bi_head, bi_current;
1057 u16 desc_chain_head, desc_current;
1058 u8 error = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
1060 if (PREDICT_TRUE (n_left > 1))
1063 txvq->avail->ring[(txvq->last_avail_idx + 1) & qsz_mask];
1065 map_guest_mem (vui, txvq->desc[next_desc].addr);
1066 if (PREDICT_TRUE (buffer_addr != 0))
1067 CLIB_PREFETCH (buffer_addr, 64, STORE);
1069 u32 bi = vum->rx_buffers[cpu_index][rx_len - 2];
1070 vlib_prefetch_buffer_with_index (vm, bi, STORE);
1071 CLIB_PREFETCH (vlib_get_buffer (vm, bi)->data, 128, STORE);
1074 desc_chain_head = desc_current =
1075 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1076 bi_head = bi_current = vum->rx_buffers[cpu_index][--rx_len];
1077 b_head = b_current = vlib_get_buffer (vm, bi_head);
1078 vlib_buffer_chain_init (b_head);
1081 if (PREDICT_TRUE (vui->is_any_layout) ||
1082 (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
1083 !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)))
1085 /* ANYLAYOUT or single buffer */
1086 offset = vui->virtio_net_hdr_sz;
1090 /* CSR case without ANYLAYOUT, skip 1st buffer */
1091 offset = txvq->desc[desc_current].len;
1094 vring_desc_t *desc_table = txvq->desc;
1095 u32 desc_index = desc_current;
1097 if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
1099 desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr);
1101 if (PREDICT_FALSE (desc_table == 0))
1103 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1111 map_guest_mem (vui, desc_table[desc_index].addr);
1112 if (PREDICT_FALSE (buffer_addr == 0))
1114 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1119 (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1121 CLIB_PREFETCH (&desc_table[desc_table[desc_index].next],
1122 sizeof (vring_desc_t), STORE);
1125 #if VHOST_USER_COPY_TX_HDR == 1
1126 if (PREDICT_TRUE (offset))
1127 clib_memcpy (b->pre_data, buffer_addr, sizeof (virtio_net_hdr_t)); /* 12 byte hdr is not used on tx */
1130 if (desc_table[desc_index].len > offset)
1132 u16 len = desc_table[desc_index].len - offset;
1133 u16 copied = vlib_buffer_chain_append_data_with_alloc (vm,
1134 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
1143 error = VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER;
1149 /* if next flag is set, take next desc in the chain */
1150 if ((desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1151 desc_index = desc_table[desc_index].next;
1157 /* consume the descriptor and return it as used */
1158 txvq->last_avail_idx++;
1159 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1161 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1162 vhost_user_log_dirty_ring (vui, txvq,
1163 ring[txvq->last_used_idx & qsz_mask]);
1164 txvq->last_used_idx++;
1166 //It is important to free RX as fast as possible such that the TX
1167 //process does not drop packets
1168 if ((txvq->last_used_idx & 0x3f) == 0) // Every 64 packets
1169 txvq->used->idx = txvq->last_used_idx;
1171 if (PREDICT_FALSE (b_head->current_length < 14 &&
1172 error == VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
1173 error = VHOST_USER_INPUT_FUNC_ERROR_UNDERSIZED_FRAME;
1175 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
1177 vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
1178 vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1179 b_head->error = node->errors[error];
1181 if (PREDICT_FALSE (n_trace > n_rx_packets))
1182 vec_add1 (vui->d_trace_buffers, bi_head);
1184 if (PREDICT_FALSE (error))
1187 next0 = VHOST_USER_RX_NEXT_DROP;
1192 b_head->current_length +
1193 b_head->total_length_not_including_first_buffer;
1195 next0 = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
1198 to_next[0] = bi_head;
1201 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1202 to_next, n_left_to_next,
1207 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1211 if (PREDICT_TRUE (vum->rx_buffers[cpu_index] != 0))
1212 _vec_len (vum->rx_buffers[cpu_index]) = rx_len;
1214 /* give buffers back to driver */
1215 CLIB_MEMORY_BARRIER ();
1216 txvq->used->idx = txvq->last_used_idx;
1217 vhost_user_log_dirty_ring (vui, txvq, idx);
1219 if (PREDICT_FALSE (vec_len (vui->d_trace_buffers) > 0))
1221 vhost_user_rx_trace (vm, node, vui, VHOST_NET_VRING_IDX_TX);
1222 vlib_set_trace_count (vm, node,
1223 n_trace - vec_len (vui->d_trace_buffers));
1226 /* interrupt (call) handling */
1227 if ((txvq->callfd > 0) && !(txvq->avail->flags & 1))
1229 txvq->n_since_last_int += n_rx_packets;
1231 if (txvq->n_since_last_int > vum->coalesce_frames)
1232 vhost_user_send_call (vm, txvq);
1235 if (PREDICT_FALSE (drops))
1237 vlib_increment_simple_counter
1238 (vnet_main.interface_main.sw_if_counters
1239 + VNET_INTERFACE_COUNTER_DROP, os_get_cpu_number (),
1240 vui->sw_if_index, drops);
1243 /* increase rx counters */
1244 vlib_increment_combined_counter
1245 (vnet_main.interface_main.combined_sw_if_counters
1246 + VNET_INTERFACE_COUNTER_RX,
1247 os_get_cpu_number (), vui->sw_if_index, n_rx_packets, n_rx_bytes);
1249 return n_rx_packets;
1253 vhost_user_input (vlib_main_t * vm,
1254 vlib_node_runtime_t * node, vlib_frame_t * f)
1256 vhost_user_main_t *vum = &vhost_user_main;
1258 dpdk_main_t *dm = &dpdk_main;
1259 u32 cpu_index = os_get_cpu_number ();
1261 vhost_user_intf_t *vui;
1262 uword n_rx_packets = 0;
1265 for (i = 0; i < vec_len (vum->vhost_user_interfaces); i++)
1267 vui = vec_elt_at_index (vum->vhost_user_interfaces, i);
1271 if ((i % dm->input_cpu_count) ==
1272 (cpu_index - dm->input_cpu_first_index))
1274 n_rx_packets += vhost_user_if_input (vm, vum, vui, node);
1277 return n_rx_packets;
1281 VLIB_REGISTER_NODE (vhost_user_input_node) = {
1282 .function = vhost_user_input,
1283 .type = VLIB_NODE_TYPE_INPUT,
1284 .name = "vhost-user-input",
1286 /* Will be enabled if/when hardware is detected. */
1287 .state = VLIB_NODE_STATE_DISABLED,
1289 .format_buffer = format_ethernet_header_with_length,
1290 .format_trace = format_vhost_user_input_trace,
1292 .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
1293 .error_strings = vhost_user_input_func_error_strings,
1295 .n_next_nodes = VHOST_USER_RX_N_NEXT,
1297 [VHOST_USER_RX_NEXT_DROP] = "error-drop",
1298 [VHOST_USER_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
1302 VLIB_NODE_FUNCTION_MULTIARCH (vhost_user_input_node, vhost_user_input)
1306 vhost_user_intfc_tx (vlib_main_t * vm,
1307 vlib_node_runtime_t * node, vlib_frame_t * frame)
1309 u32 *buffers = vlib_frame_args (frame);
1311 vhost_user_main_t *vum = &vhost_user_main;
1312 uword n_packets = 0;
1313 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
1314 vhost_user_intf_t *vui =
1315 vec_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
1316 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
1318 u8 error = VHOST_USER_TX_FUNC_ERROR_NONE;
1320 n_left = n_packets = frame->n_vectors;
1322 if (PREDICT_FALSE (!vui->is_up))
1326 (!rxvq->desc || !rxvq->avail || vui->sock_errno != 0 || !rxvq->enabled))
1328 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1332 if (PREDICT_FALSE (vui->lockp != 0))
1334 while (__sync_lock_test_and_set (vui->lockp, 1))
1338 /* only bit 0 of avail.flags is used so we don't want to deal with this
1339 interface if any other bit is set */
1340 if (PREDICT_FALSE (rxvq->avail->flags & 0xFFFE))
1342 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1346 if (PREDICT_FALSE ((rxvq->avail->idx == rxvq->last_avail_idx)))
1348 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1352 qsz_mask = rxvq->qsz - 1; /* qsz is always power of 2 */
1356 vlib_buffer_t *b0, *current_b0;
1357 u16 desc_head, desc_index, desc_len;
1358 vring_desc_t *desc_table;
1362 b0 = vlib_get_buffer (vm, buffers[0]);
1365 if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
1367 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1371 desc_table = rxvq->desc;
1372 desc_head = desc_index =
1373 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1374 if (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT)
1377 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1379 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1384 map_guest_mem (vui, rxvq->desc[desc_index].addr))))
1386 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1392 desc_len = vui->virtio_net_hdr_sz;
1395 (!(buffer_addr = map_guest_mem (vui, desc_table[desc_index].addr))))
1397 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1400 buffer_len = desc_table[desc_index].len;
1402 CLIB_PREFETCH (buffer_addr,
1403 clib_min (buffer_len, 2 * CLIB_CACHE_LINE_BYTES), STORE);
1405 virtio_net_hdr_mrg_rxbuf_t *hdr =
1406 (virtio_net_hdr_mrg_rxbuf_t *) buffer_addr;
1408 hdr->hdr.gso_type = 0;
1409 if (vui->virtio_net_hdr_sz == 12)
1410 hdr->num_buffers = 1;
1412 vhost_user_log_dirty_pages (vui, desc_table[desc_index].addr,
1413 vui->virtio_net_hdr_sz);
1415 u16 bytes_left = b0->current_length;
1416 buffer_addr += vui->virtio_net_hdr_sz;
1417 buffer_len -= vui->virtio_net_hdr_sz;
1423 if (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT)
1425 current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
1426 bytes_left = current_b0->current_length;
1435 if (buffer_len == 0)
1437 if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
1439 //Next one is chained
1440 desc_index = desc_table[desc_index].next;
1443 map_guest_mem (vui, desc_table[desc_index].addr))))
1445 rxvq->last_used_idx -= hdr->num_buffers - 1;
1446 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1447 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1450 buffer_len = desc_table[desc_index].len;
1452 else if (vui->virtio_net_hdr_sz == 12) //MRG is available
1454 //Move from available to used buffer
1455 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id =
1457 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len =
1459 vhost_user_log_dirty_ring (vui, rxvq,
1460 ring[rxvq->last_used_idx &
1462 rxvq->last_avail_idx++;
1463 rxvq->last_used_idx++;
1467 (rxvq->last_avail_idx == rxvq->avail->idx))
1469 //Dequeue queued descriptors for this packet
1470 rxvq->last_used_idx -= hdr->num_buffers - 1;
1471 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1472 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1476 desc_table = rxvq->desc;
1477 desc_head = desc_index =
1478 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1480 (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
1482 //It is seriously unlikely that a driver will put indirect descriptor
1483 //after non-indirect descriptor.
1485 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1487 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1493 rxvq->desc[desc_index].addr))))
1495 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1503 map_guest_mem (vui, desc_table[desc_index].addr))))
1505 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1508 buffer_len = desc_table[desc_index].len;
1509 CLIB_PREFETCH (buffer_addr,
1510 clib_min (buffer_len,
1511 2 * CLIB_CACHE_LINE_BYTES), STORE);
1515 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
1520 u16 bytes_to_copy = bytes_left;
1522 (bytes_to_copy > buffer_len) ? buffer_len : bytes_to_copy;
1523 clib_memcpy (buffer_addr,
1524 vlib_buffer_get_current (current_b0) +
1525 current_b0->current_length - bytes_left,
1528 vhost_user_log_dirty_pages (vui,
1529 desc_table[desc_index].addr +
1530 desc_table[desc_index].len -
1531 bytes_left - bytes_to_copy,
1534 bytes_left -= bytes_to_copy;
1535 buffer_len -= bytes_to_copy;
1536 buffer_addr += bytes_to_copy;
1537 desc_len += bytes_to_copy;
1540 if (PREDICT_TRUE (n_left >= 2))
1542 vlib_prefetch_buffer_with_index (vm, buffers[1], STORE);
1543 CLIB_PREFETCH (&n_left, sizeof (n_left), STORE);
1546 //Move from available to used ring
1547 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id = desc_head;
1548 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len = desc_len;
1549 vhost_user_log_dirty_ring (vui, rxvq,
1550 ring[rxvq->last_used_idx & qsz_mask]);
1552 rxvq->last_avail_idx++;
1553 rxvq->last_used_idx++;
1555 n_left--; //At the end for error counting when 'goto done' is invoked
1559 CLIB_MEMORY_BARRIER ();
1560 rxvq->used->idx = rxvq->last_used_idx;
1561 vhost_user_log_dirty_ring (vui, rxvq, idx);
1563 /* interrupt (call) handling */
1564 if ((rxvq->callfd > 0) && !(rxvq->avail->flags & 1))
1566 rxvq->n_since_last_int += n_packets - n_left;
1568 if (rxvq->n_since_last_int > vum->coalesce_frames)
1569 vhost_user_send_call (vm, rxvq);
1574 if (PREDICT_FALSE (vui->lockp != 0))
1577 if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
1579 vlib_error_count (vm, node->node_index, error, n_left);
1580 vlib_increment_simple_counter
1581 (vnet_main.interface_main.sw_if_counters
1582 + VNET_INTERFACE_COUNTER_DROP,
1583 os_get_cpu_number (), vui->sw_if_index, n_left);
1586 vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
1587 return frame->n_vectors;
1590 static clib_error_t *
1591 vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
1594 vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
1595 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1596 vhost_user_main_t *vum = &vhost_user_main;
1597 vhost_user_intf_t *vui =
1598 vec_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
1600 vui->admin_up = is_up;
1603 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
1604 VNET_HW_INTERFACE_FLAG_LINK_UP);
1606 return /* no error */ 0;
1610 VNET_DEVICE_CLASS (vhost_user_dev_class,static) = {
1611 .name = "vhost-user",
1612 .tx_function = vhost_user_intfc_tx,
1613 .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
1614 .tx_function_error_strings = vhost_user_tx_func_error_strings,
1615 .format_device_name = format_vhost_user_interface_name,
1616 .name_renumber = vhost_user_name_renumber,
1617 .admin_up_down_function = vhost_user_interface_admin_up_down,
1618 .no_flatten_output_chains = 1,
1621 VLIB_DEVICE_TX_FUNCTION_MULTIARCH (vhost_user_dev_class,
1622 vhost_user_intfc_tx)
1626 vhost_user_process (vlib_main_t * vm,
1627 vlib_node_runtime_t * rt, vlib_frame_t * f)
1629 vhost_user_main_t *vum = &vhost_user_main;
1630 vhost_user_intf_t *vui;
1631 struct sockaddr_un sun;
1633 unix_file_t template = { 0 };
1634 f64 timeout = 3153600000.0 /* 100 years */ ;
1635 uword *event_data = 0;
1637 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1638 sun.sun_family = AF_UNIX;
1639 template.read_function = vhost_user_socket_read;
1640 template.error_function = vhost_user_socket_error;
1648 vlib_process_wait_for_event_or_clock (vm, timeout);
1649 vlib_process_get_events (vm, &event_data);
1650 vec_reset_length (event_data);
1654 vec_foreach (vui, vum->vhost_user_interfaces)
1657 if (vui->sock_is_server || !vui->active)
1660 if (vui->unix_fd == -1)
1662 /* try to connect */
1664 strncpy (sun.sun_path, (char *) vui->sock_filename,
1665 sizeof (sun.sun_path) - 1);
1668 (sockfd, (struct sockaddr *) &sun,
1669 sizeof (struct sockaddr_un)) == 0)
1671 vui->sock_errno = 0;
1672 vui->unix_fd = sockfd;
1673 template.file_descriptor = sockfd;
1674 vui->unix_file_index = unix_file_add (&unix_main, &template);
1675 hash_set (vum->vhost_user_interface_index_by_sock_fd, sockfd,
1676 vui - vum->vhost_user_interfaces);
1678 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1684 vui->sock_errno = errno;
1689 /* check if socket is alive */
1691 socklen_t len = sizeof (error);
1693 getsockopt (vui->unix_fd, SOL_SOCKET, SO_ERROR, &error, &len);
1696 vhost_user_if_disconnect (vui);
1704 VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
1705 .function = vhost_user_process,
1706 .type = VLIB_NODE_TYPE_PROCESS,
1707 .name = "vhost-user-process",
1712 vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
1714 vhost_user_main_t *vum = &vhost_user_main;
1715 vhost_user_intf_t *vui;
1719 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
1722 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1726 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
1729 // interface is inactive
1731 // disconnect interface sockets
1732 vhost_user_if_disconnect (vui);
1733 // add to inactive interface list
1734 vec_add1 (vum->vhost_user_inactive_interfaces_index, p[0]);
1736 // reset renumbered iface
1737 if (p[0] < vec_len (vum->show_dev_instance_by_real_dev_instance))
1738 vum->show_dev_instance_by_real_dev_instance[p[0]] = ~0;
1740 ethernet_delete_interface (vnm, vui->hw_if_index);
1741 DBG_SOCK ("deleted (deactivated) vhost-user interface instance %d", p[0]);
1746 // init server socket on specified sock_filename
1748 vhost_user_init_server_sock (const char *sock_filename, int *sockfd)
1751 struct sockaddr_un un = { };
1753 /* create listening socket */
1754 fd = socket (AF_UNIX, SOCK_STREAM, 0);
1758 return VNET_API_ERROR_SYSCALL_ERROR_1;
1761 un.sun_family = AF_UNIX;
1762 strncpy ((char *) un.sun_path, (char *) sock_filename,
1763 sizeof (un.sun_path) - 1);
1765 /* remove if exists */
1766 unlink ((char *) sock_filename);
1768 if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
1770 rv = VNET_API_ERROR_SYSCALL_ERROR_2;
1774 if (listen (fd, 1) == -1)
1776 rv = VNET_API_ERROR_SYSCALL_ERROR_3;
1780 unix_file_t template = { 0 };
1781 template.read_function = vhost_user_socksvr_accept_ready;
1782 template.file_descriptor = fd;
1783 unix_file_add (&unix_main, &template);
1792 // get new vhost_user_intf_t from inactive interfaces or create new one
1793 static vhost_user_intf_t *
1794 vhost_user_vui_new ()
1796 vhost_user_main_t *vum = &vhost_user_main;
1797 vhost_user_intf_t *vui = NULL;
1798 int inactive_cnt = vec_len (vum->vhost_user_inactive_interfaces_index);
1799 // if there are any inactive ifaces
1800 if (inactive_cnt > 0)
1804 vum->vhost_user_inactive_interfaces_index[inactive_cnt - 1];
1805 if (vec_len (vum->vhost_user_interfaces) > vui_idx)
1807 vui = vec_elt_at_index (vum->vhost_user_interfaces, vui_idx);
1808 DBG_SOCK ("reusing inactive vhost-user interface index %d",
1811 // "remove" from inactive list
1812 _vec_len (vum->vhost_user_inactive_interfaces_index) -= 1;
1815 // vui was not retrieved from inactive ifaces - create new
1817 vec_add2 (vum->vhost_user_interfaces, vui, 1);
1821 // create ethernet interface for vhost user intf
1823 vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
1824 vhost_user_intf_t * vui, u8 * hwaddress)
1826 vhost_user_main_t *vum = &vhost_user_main;
1828 clib_error_t *error;
1830 /* create hw and sw interface */
1833 clib_memcpy (hwaddr, hwaddress, 6);
1837 f64 now = vlib_time_now (vm);
1839 rnd = (u32) (now * 1e6);
1840 rnd = random_u32 (&rnd);
1842 clib_memcpy (hwaddr + 2, &rnd, sizeof (rnd));
1847 error = ethernet_register_interface
1849 vhost_user_dev_class.index,
1850 vui - vum->vhost_user_interfaces /* device instance */ ,
1851 hwaddr /* ethernet address */ ,
1852 &vui->hw_if_index, 0 /* flag change */ );
1854 clib_error_report (error);
1856 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, vui->hw_if_index);
1857 hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000;
1860 // initialize vui with specified attributes
1862 vhost_user_vui_init (vnet_main_t * vnm,
1863 vhost_user_intf_t * vui, int sockfd,
1864 const char *sock_filename,
1865 u8 is_server, u64 feature_mask, u32 * sw_if_index)
1867 vnet_sw_interface_t *sw;
1868 sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
1869 vlib_thread_main_t *tm = vlib_get_thread_main ();
1872 vui->unix_fd = sockfd;
1873 vui->sw_if_index = sw->sw_if_index;
1874 vui->num_vrings = 2;
1875 vui->sock_is_server = is_server;
1876 strncpy (vui->sock_filename, sock_filename,
1877 ARRAY_LEN (vui->sock_filename) - 1);
1878 vui->sock_errno = 0;
1880 vui->feature_mask = feature_mask;
1882 vui->unix_file_index = ~0;
1883 vui->log_base_addr = 0;
1885 for (q = 0; q < 2; q++)
1887 vui->vrings[q].enabled = 0;
1890 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
1893 *sw_if_index = vui->sw_if_index;
1895 if (tm->n_vlib_mains > 1)
1897 vui->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1898 CLIB_CACHE_LINE_BYTES);
1899 memset ((void *) vui->lockp, 0, CLIB_CACHE_LINE_BYTES);
1903 // register vui and start polling on it
1905 vhost_user_vui_register (vlib_main_t * vm, vhost_user_intf_t * vui)
1907 vhost_user_main_t *vum = &vhost_user_main;
1909 dpdk_main_t *dm = &dpdk_main;
1911 vlib_thread_main_t *tm = vlib_get_thread_main ();
1914 hash_set (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd,
1915 vui - vum->vhost_user_interfaces);
1916 hash_set (vum->vhost_user_interface_index_by_sw_if_index, vui->sw_if_index,
1917 vui - vum->vhost_user_interfaces);
1921 cpu_index = dm->input_cpu_first_index +
1922 (vui - vum->vhost_user_interfaces) % dm->input_cpu_count;
1924 if (tm->n_vlib_mains == 1)
1926 vlib_node_set_state (vm, vhost_user_input_node.index,
1927 VLIB_NODE_STATE_POLLING);
1930 vlib_node_set_state (vlib_mains[cpu_index], vhost_user_input_node.index,
1931 VLIB_NODE_STATE_POLLING);
1934 /* tell process to start polling for sockets */
1935 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1939 vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
1940 const char *sock_filename,
1944 u8 renumber, u32 custom_dev_instance, u8 * hwaddr)
1946 vhost_user_intf_t *vui = NULL;
1953 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
1959 vui = vhost_user_vui_new ();
1960 ASSERT (vui != NULL);
1962 vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
1963 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
1964 feature_mask, &sw_if_idx);
1968 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1971 vhost_user_vui_register (vm, vui);
1974 *sw_if_index = sw_if_idx;
1980 vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
1981 const char *sock_filename,
1984 u64 feature_mask, u8 renumber, u32 custom_dev_instance)
1986 vhost_user_main_t *vum = &vhost_user_main;
1987 vhost_user_intf_t *vui = NULL;
1993 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
1996 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
2000 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
2003 // interface is inactive
2005 // disconnect interface sockets
2006 vhost_user_if_disconnect (vui);
2010 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
2016 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
2017 feature_mask, &sw_if_idx);
2021 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
2024 vhost_user_vui_register (vm, vui);
2030 vhost_user_connect_command_fn (vlib_main_t * vm,
2031 unformat_input_t * input,
2032 vlib_cli_command_t * cmd)
2034 unformat_input_t _line_input, *line_input = &_line_input;
2035 u8 *sock_filename = NULL;
2038 u64 feature_mask = (u64) ~ 0;
2040 u32 custom_dev_instance = ~0;
2044 /* Get a line of input. */
2045 if (!unformat_user (input, unformat_line_input, line_input))
2048 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2050 if (unformat (line_input, "socket %s", &sock_filename))
2052 else if (unformat (line_input, "server"))
2054 else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
2058 (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
2060 else if (unformat (line_input, "renumber %d", &custom_dev_instance))
2065 return clib_error_return (0, "unknown input `%U'",
2066 format_unformat_error, input);
2068 unformat_free (line_input);
2070 vnet_main_t *vnm = vnet_get_main ();
2073 if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
2074 is_server, &sw_if_index, feature_mask,
2075 renumber, custom_dev_instance, hw)))
2077 vec_free (sock_filename);
2078 return clib_error_return (0, "vhost_user_create_if returned %d", rv);
2081 vec_free (sock_filename);
2082 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
2088 vhost_user_delete_command_fn (vlib_main_t * vm,
2089 unformat_input_t * input,
2090 vlib_cli_command_t * cmd)
2092 unformat_input_t _line_input, *line_input = &_line_input;
2093 u32 sw_if_index = ~0;
2095 /* Get a line of input. */
2096 if (!unformat_user (input, unformat_line_input, line_input))
2099 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2101 if (unformat (line_input, "sw_if_index %d", &sw_if_index))
2104 return clib_error_return (0, "unknown input `%U'",
2105 format_unformat_error, input);
2107 unformat_free (line_input);
2109 vnet_main_t *vnm = vnet_get_main ();
2111 vhost_user_delete_if (vnm, vm, sw_if_index);
2117 vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
2118 vhost_user_intf_details_t ** out_vuids)
2121 vhost_user_main_t *vum = &vhost_user_main;
2122 vhost_user_intf_t *vui;
2123 vhost_user_intf_details_t *r_vuids = NULL;
2124 vhost_user_intf_details_t *vuid = NULL;
2125 u32 *hw_if_indices = 0;
2126 vnet_hw_interface_t *hi;
2133 vec_foreach (vui, vum->vhost_user_interfaces)
2136 vec_add1 (hw_if_indices, vui->hw_if_index);
2139 for (i = 0; i < vec_len (hw_if_indices); i++)
2141 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2142 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2144 vec_add2 (r_vuids, vuid, 1);
2145 vuid->sw_if_index = vui->sw_if_index;
2146 vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
2147 vuid->features = vui->features;
2148 vuid->is_server = vui->sock_is_server;
2149 vuid->num_regions = vui->nregions;
2150 vuid->sock_errno = vui->sock_errno;
2151 strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
2152 ARRAY_LEN (vuid->sock_filename) - 1);
2154 s = format (s, "%v%c", hi->name, 0);
2156 strncpy ((char *) vuid->if_name, (char *) s,
2157 ARRAY_LEN (vuid->if_name) - 1);
2162 vec_free (hw_if_indices);
2164 *out_vuids = r_vuids;
2170 show_vhost_user_command_fn (vlib_main_t * vm,
2171 unformat_input_t * input,
2172 vlib_cli_command_t * cmd)
2174 clib_error_t *error = 0;
2175 vnet_main_t *vnm = vnet_get_main ();
2176 vhost_user_main_t *vum = &vhost_user_main;
2177 vhost_user_intf_t *vui;
2178 u32 hw_if_index, *hw_if_indices = 0;
2179 vnet_hw_interface_t *hi;
2187 struct feat_struct *feat_entry;
2189 static struct feat_struct feat_array[] = {
2190 #define _(s,b) { .str = #s, .bit = b, },
2191 foreach_virtio_net_feature
2196 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2199 (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
2201 vec_add1 (hw_if_indices, hw_if_index);
2202 vlib_cli_output (vm, "add %d", hw_if_index);
2204 else if (unformat (input, "descriptors") || unformat (input, "desc"))
2208 error = clib_error_return (0, "unknown input `%U'",
2209 format_unformat_error, input);
2213 if (vec_len (hw_if_indices) == 0)
2215 vec_foreach (vui, vum->vhost_user_interfaces)
2218 vec_add1 (hw_if_indices, vui->hw_if_index);
2221 vlib_cli_output (vm, "Virtio vhost-user interfaces");
2222 vlib_cli_output (vm, "Global:\n coalesce frames %d time %e\n\n",
2223 vum->coalesce_frames, vum->coalesce_time);
2225 for (i = 0; i < vec_len (hw_if_indices); i++)
2227 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2228 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2229 vlib_cli_output (vm, "Interface: %s (ifindex %d)",
2230 hi->name, hw_if_indices[i]);
2232 vlib_cli_output (vm, "virtio_net_hdr_sz %d\n features (0x%llx): \n",
2233 vui->virtio_net_hdr_sz, vui->features);
2235 feat_entry = (struct feat_struct *) &feat_array;
2236 while (feat_entry->str)
2238 if (vui->features & (1 << feat_entry->bit))
2239 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
2244 vlib_cli_output (vm, "\n");
2247 vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
2249 vui->sock_is_server ? "server" : "client",
2250 strerror (vui->sock_errno));
2252 vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
2256 vlib_cli_output (vm,
2257 " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
2258 vlib_cli_output (vm,
2259 " ====== ===== ================== ================== ================== ================== ==================\n");
2261 for (j = 0; j < vui->nregions; j++)
2263 vlib_cli_output (vm,
2264 " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
2265 j, vui->region_mmap_fd[j],
2266 vui->regions[j].guest_phys_addr,
2267 vui->regions[j].memory_size,
2268 vui->regions[j].userspace_addr,
2269 vui->regions[j].mmap_offset,
2270 pointer_to_uword (vui->region_mmap_addr[j]));
2272 for (q = 0; q < vui->num_vrings; q++)
2274 vlib_cli_output (vm, "\n Virtqueue %d\n", q);
2276 vlib_cli_output (vm,
2277 " qsz %d last_avail_idx %d last_used_idx %d\n",
2278 vui->vrings[q].qsz, vui->vrings[q].last_avail_idx,
2279 vui->vrings[q].last_used_idx);
2281 if (vui->vrings[q].avail && vui->vrings[q].used)
2282 vlib_cli_output (vm,
2283 " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
2284 vui->vrings[q].avail->flags,
2285 vui->vrings[q].avail->idx,
2286 vui->vrings[q].used->flags,
2287 vui->vrings[q].used->idx);
2289 vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
2290 vui->vrings[q].kickfd,
2291 vui->vrings[q].callfd, vui->vrings[q].errfd);
2295 vlib_cli_output (vm, "\n descriptor table:\n");
2296 vlib_cli_output (vm,
2297 " id addr len flags next user_addr\n");
2298 vlib_cli_output (vm,
2299 " ===== ================== ===== ====== ===== ==================\n");
2300 for (j = 0; j < vui->vrings[q].qsz; j++)
2302 vlib_cli_output (vm,
2303 " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
2304 j, vui->vrings[q].desc[j].addr,
2305 vui->vrings[q].desc[j].len,
2306 vui->vrings[q].desc[j].flags,
2307 vui->vrings[q].desc[j].next,
2308 pointer_to_uword (map_guest_mem
2310 vui->vrings[q].desc[j].
2315 vlib_cli_output (vm, "\n");
2318 vec_free (hw_if_indices);
2328 VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
2329 .path = "create vhost-user",
2330 .short_help = "create vhost-user socket <socket-filename> [server] [feature-mask <hex>] [renumber <dev_instance>]",
2331 .function = vhost_user_connect_command_fn,
2334 VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
2335 .path = "delete vhost-user",
2336 .short_help = "delete vhost-user sw_if_index <nn>",
2337 .function = vhost_user_delete_command_fn,
2340 VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
2341 .path = "show vhost-user",
2342 .short_help = "show vhost-user interface",
2343 .function = show_vhost_user_command_fn,
2348 static clib_error_t *
2349 vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
2351 vhost_user_main_t *vum = &vhost_user_main;
2353 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2355 if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
2357 else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
2359 else if (unformat (input, "dont-dump-memory"))
2360 vum->dont_dump_vhost_user_memory = 1;
2362 return clib_error_return (0, "unknown input `%U'",
2363 format_unformat_error, input);
2369 /* vhost-user { ... } configuration. */
2370 VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
2373 vhost_user_unmap_all (void)
2375 vhost_user_main_t *vum = &vhost_user_main;
2376 vhost_user_intf_t *vui;
2378 if (vum->dont_dump_vhost_user_memory)
2380 vec_foreach (vui, vum->vhost_user_interfaces)
2382 unmap_all_mem_regions (vui);
2388 * fd.io coding-style-patch-verification: ON
2391 * eval: (c-set-style "gnu")