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 (1UL << FEAT_VIRTIO_F_VERSION_1);
395 msg.u64 &= vui->feature_mask;
397 msg.size = sizeof (msg.u64);
400 case VHOST_USER_SET_FEATURES:
401 DBG_SOCK ("if %d msg VHOST_USER_SET_FEATURES features 0x%016llx",
402 vui->hw_if_index, msg.u64);
404 vui->features = msg.u64;
406 if (vui->features & (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF))
407 vui->virtio_net_hdr_sz = 12;
409 vui->virtio_net_hdr_sz = 10;
412 (vui->features & (1 << FEAT_VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
414 ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
415 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
418 for (q = 0; q < 2; q++)
420 vui->vrings[q].desc = 0;
421 vui->vrings[q].avail = 0;
422 vui->vrings[q].used = 0;
423 vui->vrings[q].log_guest_addr = 0;
424 vui->vrings[q].log_used = 0;
427 DBG_SOCK ("interface %d disconnected", vui->sw_if_index);
431 case VHOST_USER_SET_MEM_TABLE:
432 DBG_SOCK ("if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
433 vui->hw_if_index, msg.memory.nregions);
435 if ((msg.memory.nregions < 1) ||
436 (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
439 DBG_SOCK ("number of mem regions must be between 1 and %i",
440 VHOST_MEMORY_MAX_NREGIONS);
445 if (msg.memory.nregions != number_of_fds)
447 DBG_SOCK ("each memory region must have FD");
450 unmap_all_mem_regions (vui);
451 for (i = 0; i < msg.memory.nregions; i++)
453 clib_memcpy (&(vui->regions[i]), &msg.memory.regions[i],
454 sizeof (vhost_user_memory_region_t));
456 long page_sz = get_huge_page_size (fds[i]);
458 /* align size to 2M page */
459 ssize_t map_sz = (vui->regions[i].memory_size +
460 vui->regions[i].mmap_offset +
461 page_sz) & ~(page_sz - 1);
463 vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
464 MAP_SHARED, fds[i], 0);
467 ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
468 "page_sz 0x%x", i, map_sz, fds[i], vui->region_mmap_addr[i],
471 if (vui->region_mmap_addr[i] == MAP_FAILED)
473 clib_warning ("failed to map memory. errno is %d", errno);
476 vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
477 vui->region_mmap_fd[i] = fds[i];
479 vui->nregions = msg.memory.nregions;
482 case VHOST_USER_SET_VRING_NUM:
483 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
484 vui->hw_if_index, msg.state.index, msg.state.num);
486 if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
487 (msg.state.num == 0) || /* it cannot be zero */
488 (msg.state.num % 2)) /* must be power of 2 */
490 vui->vrings[msg.state.index].qsz = msg.state.num;
493 case VHOST_USER_SET_VRING_ADDR:
494 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
495 vui->hw_if_index, msg.state.index);
497 vui->vrings[msg.state.index].desc = (vring_desc_t *)
498 map_user_mem (vui, msg.addr.desc_user_addr);
499 vui->vrings[msg.state.index].used = (vring_used_t *)
500 map_user_mem (vui, msg.addr.used_user_addr);
501 vui->vrings[msg.state.index].avail = (vring_avail_t *)
502 map_user_mem (vui, msg.addr.avail_user_addr);
504 if ((vui->vrings[msg.state.index].desc == NULL) ||
505 (vui->vrings[msg.state.index].used == NULL) ||
506 (vui->vrings[msg.state.index].avail == NULL))
508 DBG_SOCK ("failed to map user memory for hw_if_index %d",
513 vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
514 vui->vrings[msg.state.index].log_used =
515 (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
517 /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
518 the ring is initialized in an enabled state. */
520 if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
522 vui->vrings[msg.state.index].enabled = 1;
525 vui->vrings[msg.state.index].last_used_idx =
526 vui->vrings[msg.state.index].used->idx;
528 /* tell driver that we don't want interrupts */
529 vui->vrings[msg.state.index].used->flags |= 1;
532 case VHOST_USER_SET_OWNER:
533 DBG_SOCK ("if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
536 case VHOST_USER_RESET_OWNER:
537 DBG_SOCK ("if %d msg VHOST_USER_RESET_OWNER", vui->hw_if_index);
540 case VHOST_USER_SET_VRING_CALL:
541 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_CALL u64 %d",
542 vui->hw_if_index, msg.u64);
544 q = (u8) (msg.u64 & 0xFF);
546 if (!(msg.u64 & 0x100))
548 if (number_of_fds != 1)
551 /* if there is old fd, delete it */
552 if (vui->vrings[q].callfd)
554 unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
555 vui->vrings[q].callfd_idx);
556 unix_file_del (&unix_main, uf);
558 vui->vrings[q].callfd = fds[0];
559 template.read_function = vhost_user_callfd_read_ready;
560 template.file_descriptor = fds[0];
561 vui->vrings[q].callfd_idx = unix_file_add (&unix_main, &template);
564 vui->vrings[q].callfd = -1;
567 case VHOST_USER_SET_VRING_KICK:
568 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_KICK u64 %d",
569 vui->hw_if_index, msg.u64);
571 q = (u8) (msg.u64 & 0xFF);
573 if (!(msg.u64 & 0x100))
575 if (number_of_fds != 1)
578 vui->vrings[q].kickfd = fds[0];
581 vui->vrings[q].kickfd = -1;
584 case VHOST_USER_SET_VRING_ERR:
585 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ERR u64 %d",
586 vui->hw_if_index, msg.u64);
588 q = (u8) (msg.u64 & 0xFF);
590 if (!(msg.u64 & 0x100))
592 if (number_of_fds != 1)
600 vui->vrings[q].errfd = fd;
603 case VHOST_USER_SET_VRING_BASE:
604 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
605 vui->hw_if_index, msg.state.index, msg.state.num);
607 vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
610 case VHOST_USER_GET_VRING_BASE:
611 DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
612 vui->hw_if_index, msg.state.index, msg.state.num);
614 /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
615 vui->vrings[msg.state.index].enabled = 0;
617 msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
619 msg.size = sizeof (msg.state);
622 case VHOST_USER_NONE:
623 DBG_SOCK ("if %d msg VHOST_USER_NONE", vui->hw_if_index);
627 case VHOST_USER_SET_LOG_BASE:
629 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_BASE", vui->hw_if_index);
631 if (msg.size != sizeof (msg.log))
634 ("invalid msg size for VHOST_USER_SET_LOG_BASE: %d instead of %d",
635 msg.size, sizeof (msg.log));
640 (vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
643 ("VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but VHOST_USER_SET_LOG_BASE received");
648 /* align size to 2M page */
649 long page_sz = get_huge_page_size (fd);
651 (msg.log.size + msg.log.offset + page_sz) & ~(page_sz - 1);
653 vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
657 ("map log region addr 0 len 0x%lx off 0x%lx fd %d mapped 0x%lx",
658 map_sz, msg.log.offset, fd, vui->log_base_addr);
660 if (vui->log_base_addr == MAP_FAILED)
662 clib_warning ("failed to map memory. errno is %d", errno);
666 vui->log_base_addr += msg.log.offset;
667 vui->log_size = msg.log.size;
670 msg.size = sizeof (msg.u64);
675 case VHOST_USER_SET_LOG_FD:
676 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
680 case VHOST_USER_GET_PROTOCOL_FEATURES:
681 DBG_SOCK ("if %d msg VHOST_USER_GET_PROTOCOL_FEATURES",
685 msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD);
686 msg.size = sizeof (msg.u64);
689 case VHOST_USER_SET_PROTOCOL_FEATURES:
690 DBG_SOCK ("if %d msg VHOST_USER_SET_PROTOCOL_FEATURES features 0x%lx",
691 vui->hw_if_index, msg.u64);
693 vui->protocol_features = msg.u64;
697 case VHOST_USER_SET_VRING_ENABLE:
698 DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE, enable: %d",
699 vui->hw_if_index, msg.state.num);
700 vui->vrings[msg.state.index].enabled = msg.state.num;
704 DBG_SOCK ("unknown vhost-user message %d received. closing socket",
709 /* if we have pointers to descriptor table, go up */
711 vui->vrings[VHOST_NET_VRING_IDX_TX].desc &&
712 vui->vrings[VHOST_NET_VRING_IDX_RX].desc)
715 DBG_SOCK ("interface %d connected", vui->sw_if_index);
717 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
718 VNET_HW_INTERFACE_FLAG_LINK_UP);
723 /* if we need to reply */
727 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
728 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
735 vhost_user_if_disconnect (vui);
739 static clib_error_t *
740 vhost_user_socket_error (unix_file_t * uf)
742 vhost_user_main_t *vum = &vhost_user_main;
743 vhost_user_intf_t *vui;
746 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
747 uf->file_descriptor);
750 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
754 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
756 vhost_user_if_disconnect (vui);
760 static clib_error_t *
761 vhost_user_socksvr_accept_ready (unix_file_t * uf)
763 int client_fd, client_len;
764 struct sockaddr_un client;
765 unix_file_t template = { 0 };
766 vhost_user_main_t *vum = &vhost_user_main;
767 vhost_user_intf_t *vui;
770 p = hash_get (vum->vhost_user_interface_index_by_listener_fd,
771 uf->file_descriptor);
774 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
778 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
780 client_len = sizeof (client);
781 client_fd = accept (uf->file_descriptor,
782 (struct sockaddr *) &client,
783 (socklen_t *) & client_len);
786 return clib_error_return_unix (0, "accept");
788 template.read_function = vhost_user_socket_read;
789 template.error_function = vhost_user_socket_error;
790 template.file_descriptor = client_fd;
791 vui->unix_file_index = unix_file_add (&unix_main, &template);
793 vui->client_fd = client_fd;
794 hash_set (vum->vhost_user_interface_index_by_sock_fd, vui->client_fd,
795 vui - vum->vhost_user_interfaces);
800 static clib_error_t *
801 vhost_user_init (vlib_main_t * vm)
804 vhost_user_main_t *vum = &vhost_user_main;
805 vlib_thread_main_t *tm = vlib_get_thread_main ();
807 error = vlib_call_init_function (vm, ip4_init);
811 vum->vhost_user_interface_index_by_listener_fd =
812 hash_create (0, sizeof (uword));
813 vum->vhost_user_interface_index_by_sock_fd =
814 hash_create (0, sizeof (uword));
815 vum->vhost_user_interface_index_by_sw_if_index =
816 hash_create (0, sizeof (uword));
817 vum->coalesce_frames = 32;
818 vum->coalesce_time = 1e-3;
820 vec_validate_aligned (vum->rx_buffers, tm->n_vlib_mains - 1,
821 CLIB_CACHE_LINE_BYTES);
826 VLIB_INIT_FUNCTION (vhost_user_init);
828 static clib_error_t *
829 vhost_user_exit (vlib_main_t * vm)
835 VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
839 VHOST_USER_RX_NEXT_ETHERNET_INPUT,
840 VHOST_USER_RX_NEXT_DROP,
841 VHOST_USER_RX_N_NEXT,
849 #if VHOST_USER_COPY_TX_HDR == 1
850 virtio_net_hdr_t hdr;
852 } vhost_user_input_trace_t;
855 format_vhost_user_input_trace (u8 * s, va_list * va)
857 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
858 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
859 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
860 vhost_user_main_t *vum = &vhost_user_main;
861 vhost_user_input_trace_t *t = va_arg (*va, vhost_user_input_trace_t *);
862 vhost_user_intf_t *vui = vec_elt_at_index (vum->vhost_user_interfaces,
865 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
867 #if VHOST_USER_COPY_TX_HDR == 1
868 uword indent = format_get_indent (s);
871 s = format (s, "%U virtqueue %d",
872 format_vnet_sw_interface_name, vnm, sw, t->virtqueue);
874 #if VHOST_USER_COPY_TX_HDR == 1
875 s = format (s, "\n%Uvirtio_net_hdr flags 0x%02x gso_type %u hdr_len %u",
876 format_white_space, indent,
877 t->hdr.flags, t->hdr.gso_type, t->hdr.hdr_len);
884 vhost_user_rx_trace (vlib_main_t * vm,
885 vlib_node_runtime_t * node,
886 vhost_user_intf_t * vui, i16 virtqueue)
889 vhost_user_main_t *vum = &vhost_user_main;
891 u32 next_index = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
893 n_left = vec_len (vui->d_trace_buffers);
894 b = vui->d_trace_buffers;
900 vhost_user_input_trace_t *t0;
905 b0 = vlib_get_buffer (vm, bi0);
906 vlib_trace_buffer (vm, node, next_index, b0, /* follow_chain */ 0);
907 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
908 t0->virtqueue = virtqueue;
909 t0->device_index = vui - vum->vhost_user_interfaces;
910 #if VHOST_USER_COPY_TX_HDR == 1
911 clib_memcpy (&t0->hdr, b0->pre_data, sizeof (virtio_net_hdr_t));
919 vhost_user_send_call (vlib_main_t * vm, vhost_user_vring_t * vq)
921 vhost_user_main_t *vum = &vhost_user_main;
923 int rv __attribute__ ((unused));
924 /* $$$$ pay attention to rv */
925 rv = write (vq->callfd, &x, sizeof (x));
926 vq->n_since_last_int = 0;
927 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
932 vhost_user_if_input (vlib_main_t * vm,
933 vhost_user_main_t * vum,
934 vhost_user_intf_t * vui, vlib_node_runtime_t * node)
936 vhost_user_vring_t *txvq = &vui->vrings[VHOST_NET_VRING_IDX_TX];
937 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
938 uword n_rx_packets = 0, n_rx_bytes = 0;
940 u32 n_left_to_next, *to_next;
943 uword n_trace = vlib_get_trace_count (vm, node);
945 u32 cpu_index, rx_len, drops, flush;
946 f64 now = vlib_time_now (vm);
948 vec_reset_length (vui->d_trace_buffers);
950 /* no descriptor ptr - bail out */
951 if (PREDICT_FALSE (!txvq->desc || !txvq->avail || !txvq->enabled))
954 /* do we have pending intterupts ? */
955 if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
956 vhost_user_send_call (vm, txvq);
958 if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
959 vhost_user_send_call (vm, rxvq);
961 /* only bit 0 of avail.flags is used so we don't want to deal with this
962 interface if any other bit is set */
963 if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
966 n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
969 if (PREDICT_FALSE (n_left == 0))
972 if (PREDICT_FALSE (n_left == txvq->qsz))
974 //Informational error logging when VPP is not receiving packets fast enough
975 vlib_error_count (vm, node->node_index,
976 VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
979 if (PREDICT_FALSE (!vui->admin_up))
981 /* if intf is admin down, just drop all packets waiting in the ring */
982 txvq->last_avail_idx = txvq->last_used_idx = txvq->avail->idx;
983 CLIB_MEMORY_BARRIER ();
984 txvq->used->idx = txvq->last_used_idx;
985 vhost_user_log_dirty_ring (vui, txvq, idx);
986 vhost_user_send_call (vm, txvq);
990 qsz_mask = txvq->qsz - 1;
991 cpu_index = os_get_cpu_number ();
995 if (n_left > VLIB_FRAME_SIZE)
996 n_left = VLIB_FRAME_SIZE;
998 /* Allocate some buffers.
999 * Note that buffers that are chained for jumbo
1000 * frames are allocated separately using a slower path.
1001 * The idea is to be certain to have enough buffers at least
1002 * to cycle through the descriptors without having to check for errors.
1003 * For jumbo frames, the bottleneck is memory copy anyway.
1005 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1007 vec_alloc (vum->rx_buffers[cpu_index], 2 * VLIB_FRAME_SIZE);
1009 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1010 flush = n_left; //Drop all input
1013 if (PREDICT_FALSE (_vec_len (vum->rx_buffers[cpu_index]) < n_left))
1015 u32 curr_len = _vec_len (vum->rx_buffers[cpu_index]);
1016 _vec_len (vum->rx_buffers[cpu_index]) +=
1017 vlib_buffer_alloc_from_free_list (vm,
1018 vum->rx_buffers[cpu_index] +
1020 2 * VLIB_FRAME_SIZE - curr_len,
1021 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
1023 if (PREDICT_FALSE (n_left > _vec_len (vum->rx_buffers[cpu_index])))
1024 flush = n_left - _vec_len (vum->rx_buffers[cpu_index]);
1027 if (PREDICT_FALSE (flush))
1029 //Remove some input buffers
1032 vlib_error_count (vm, vhost_user_input_node.index,
1033 VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
1036 u16 desc_chain_head =
1037 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1038 txvq->last_avail_idx++;
1039 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1041 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1042 vhost_user_log_dirty_ring (vui, txvq,
1043 ring[txvq->last_used_idx & qsz_mask]);
1044 txvq->last_used_idx++;
1049 rx_len = vec_len (vum->rx_buffers[cpu_index]); //vector might be null
1052 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1054 while (n_left > 0 && n_left_to_next > 0)
1056 vlib_buffer_t *b_head, *b_current;
1057 u32 bi_head, bi_current;
1058 u16 desc_chain_head, desc_current;
1059 u8 error = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
1061 if (PREDICT_TRUE (n_left > 1))
1064 txvq->avail->ring[(txvq->last_avail_idx + 1) & qsz_mask];
1066 map_guest_mem (vui, txvq->desc[next_desc].addr);
1067 if (PREDICT_TRUE (buffer_addr != 0))
1068 CLIB_PREFETCH (buffer_addr, 64, STORE);
1070 u32 bi = vum->rx_buffers[cpu_index][rx_len - 2];
1071 vlib_prefetch_buffer_with_index (vm, bi, STORE);
1072 CLIB_PREFETCH (vlib_get_buffer (vm, bi)->data, 128, STORE);
1075 desc_chain_head = desc_current =
1076 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1077 bi_head = bi_current = vum->rx_buffers[cpu_index][--rx_len];
1078 b_head = b_current = vlib_get_buffer (vm, bi_head);
1079 vlib_buffer_chain_init (b_head);
1082 if (PREDICT_TRUE (vui->is_any_layout) ||
1083 (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
1084 !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)))
1086 /* ANYLAYOUT or single buffer */
1087 offset = vui->virtio_net_hdr_sz;
1091 /* CSR case without ANYLAYOUT, skip 1st buffer */
1092 offset = txvq->desc[desc_current].len;
1095 vring_desc_t *desc_table = txvq->desc;
1096 u32 desc_index = desc_current;
1098 if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
1100 desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr);
1102 if (PREDICT_FALSE (desc_table == 0))
1104 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1112 map_guest_mem (vui, desc_table[desc_index].addr);
1113 if (PREDICT_FALSE (buffer_addr == 0))
1115 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1120 (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1122 CLIB_PREFETCH (&desc_table[desc_table[desc_index].next],
1123 sizeof (vring_desc_t), STORE);
1126 #if VHOST_USER_COPY_TX_HDR == 1
1127 if (PREDICT_TRUE (offset))
1128 clib_memcpy (b->pre_data, buffer_addr, sizeof (virtio_net_hdr_t)); /* 12 byte hdr is not used on tx */
1131 if (desc_table[desc_index].len > offset)
1133 u16 len = desc_table[desc_index].len - offset;
1134 u16 copied = vlib_buffer_chain_append_data_with_alloc (vm,
1135 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
1144 error = VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER;
1150 /* if next flag is set, take next desc in the chain */
1151 if ((desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1152 desc_index = desc_table[desc_index].next;
1158 /* consume the descriptor and return it as used */
1159 txvq->last_avail_idx++;
1160 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1162 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1163 vhost_user_log_dirty_ring (vui, txvq,
1164 ring[txvq->last_used_idx & qsz_mask]);
1165 txvq->last_used_idx++;
1167 //It is important to free RX as fast as possible such that the TX
1168 //process does not drop packets
1169 if ((txvq->last_used_idx & 0x3f) == 0) // Every 64 packets
1170 txvq->used->idx = txvq->last_used_idx;
1172 if (PREDICT_FALSE (b_head->current_length < 14 &&
1173 error == VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
1174 error = VHOST_USER_INPUT_FUNC_ERROR_UNDERSIZED_FRAME;
1176 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
1178 vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
1179 vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1180 b_head->error = node->errors[error];
1182 if (PREDICT_FALSE (n_trace > n_rx_packets))
1183 vec_add1 (vui->d_trace_buffers, bi_head);
1185 if (PREDICT_FALSE (error))
1188 next0 = VHOST_USER_RX_NEXT_DROP;
1193 b_head->current_length +
1194 b_head->total_length_not_including_first_buffer;
1196 next0 = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
1199 to_next[0] = bi_head;
1202 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1203 to_next, n_left_to_next,
1208 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1212 if (PREDICT_TRUE (vum->rx_buffers[cpu_index] != 0))
1213 _vec_len (vum->rx_buffers[cpu_index]) = rx_len;
1215 /* give buffers back to driver */
1216 CLIB_MEMORY_BARRIER ();
1217 txvq->used->idx = txvq->last_used_idx;
1218 vhost_user_log_dirty_ring (vui, txvq, idx);
1220 if (PREDICT_FALSE (vec_len (vui->d_trace_buffers) > 0))
1222 vhost_user_rx_trace (vm, node, vui, VHOST_NET_VRING_IDX_TX);
1223 vlib_set_trace_count (vm, node,
1224 n_trace - vec_len (vui->d_trace_buffers));
1227 /* interrupt (call) handling */
1228 if ((txvq->callfd > 0) && !(txvq->avail->flags & 1))
1230 txvq->n_since_last_int += n_rx_packets;
1232 if (txvq->n_since_last_int > vum->coalesce_frames)
1233 vhost_user_send_call (vm, txvq);
1236 if (PREDICT_FALSE (drops))
1238 vlib_increment_simple_counter
1239 (vnet_main.interface_main.sw_if_counters
1240 + VNET_INTERFACE_COUNTER_DROP, os_get_cpu_number (),
1241 vui->sw_if_index, drops);
1244 /* increase rx counters */
1245 vlib_increment_combined_counter
1246 (vnet_main.interface_main.combined_sw_if_counters
1247 + VNET_INTERFACE_COUNTER_RX,
1248 os_get_cpu_number (), vui->sw_if_index, n_rx_packets, n_rx_bytes);
1250 return n_rx_packets;
1254 vhost_user_input (vlib_main_t * vm,
1255 vlib_node_runtime_t * node, vlib_frame_t * f)
1257 vhost_user_main_t *vum = &vhost_user_main;
1259 dpdk_main_t *dm = &dpdk_main;
1260 u32 cpu_index = os_get_cpu_number ();
1262 vhost_user_intf_t *vui;
1263 uword n_rx_packets = 0;
1266 for (i = 0; i < vec_len (vum->vhost_user_interfaces); i++)
1268 vui = vec_elt_at_index (vum->vhost_user_interfaces, i);
1272 if ((i % dm->input_cpu_count) ==
1273 (cpu_index - dm->input_cpu_first_index))
1275 n_rx_packets += vhost_user_if_input (vm, vum, vui, node);
1278 return n_rx_packets;
1282 VLIB_REGISTER_NODE (vhost_user_input_node) = {
1283 .function = vhost_user_input,
1284 .type = VLIB_NODE_TYPE_INPUT,
1285 .name = "vhost-user-input",
1287 /* Will be enabled if/when hardware is detected. */
1288 .state = VLIB_NODE_STATE_DISABLED,
1290 .format_buffer = format_ethernet_header_with_length,
1291 .format_trace = format_vhost_user_input_trace,
1293 .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
1294 .error_strings = vhost_user_input_func_error_strings,
1296 .n_next_nodes = VHOST_USER_RX_N_NEXT,
1298 [VHOST_USER_RX_NEXT_DROP] = "error-drop",
1299 [VHOST_USER_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
1303 VLIB_NODE_FUNCTION_MULTIARCH (vhost_user_input_node, vhost_user_input)
1307 vhost_user_intfc_tx (vlib_main_t * vm,
1308 vlib_node_runtime_t * node, vlib_frame_t * frame)
1310 u32 *buffers = vlib_frame_args (frame);
1312 vhost_user_main_t *vum = &vhost_user_main;
1313 uword n_packets = 0;
1314 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
1315 vhost_user_intf_t *vui =
1316 vec_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
1317 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
1319 u8 error = VHOST_USER_TX_FUNC_ERROR_NONE;
1321 n_left = n_packets = frame->n_vectors;
1323 if (PREDICT_FALSE (!vui->is_up))
1327 (!rxvq->desc || !rxvq->avail || vui->sock_errno != 0 || !rxvq->enabled))
1329 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1333 if (PREDICT_FALSE (vui->lockp != 0))
1335 while (__sync_lock_test_and_set (vui->lockp, 1))
1339 /* only bit 0 of avail.flags is used so we don't want to deal with this
1340 interface if any other bit is set */
1341 if (PREDICT_FALSE (rxvq->avail->flags & 0xFFFE))
1343 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1347 if (PREDICT_FALSE ((rxvq->avail->idx == rxvq->last_avail_idx)))
1349 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1353 qsz_mask = rxvq->qsz - 1; /* qsz is always power of 2 */
1357 vlib_buffer_t *b0, *current_b0;
1358 u16 desc_head, desc_index, desc_len;
1359 vring_desc_t *desc_table;
1363 b0 = vlib_get_buffer (vm, buffers[0]);
1366 if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
1368 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1372 desc_table = rxvq->desc;
1373 desc_head = desc_index =
1374 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1375 if (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT)
1378 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1380 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1385 map_guest_mem (vui, rxvq->desc[desc_index].addr))))
1387 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1393 desc_len = vui->virtio_net_hdr_sz;
1396 (!(buffer_addr = map_guest_mem (vui, desc_table[desc_index].addr))))
1398 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1401 buffer_len = desc_table[desc_index].len;
1403 CLIB_PREFETCH (buffer_addr,
1404 clib_min (buffer_len, 2 * CLIB_CACHE_LINE_BYTES), STORE);
1406 virtio_net_hdr_mrg_rxbuf_t *hdr =
1407 (virtio_net_hdr_mrg_rxbuf_t *) buffer_addr;
1409 hdr->hdr.gso_type = 0;
1410 if (vui->virtio_net_hdr_sz == 12)
1411 hdr->num_buffers = 1;
1413 vhost_user_log_dirty_pages (vui, desc_table[desc_index].addr,
1414 vui->virtio_net_hdr_sz);
1416 u16 bytes_left = b0->current_length;
1417 buffer_addr += vui->virtio_net_hdr_sz;
1418 buffer_len -= vui->virtio_net_hdr_sz;
1424 if (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT)
1426 current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
1427 bytes_left = current_b0->current_length;
1436 if (buffer_len == 0)
1438 if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
1440 //Next one is chained
1441 desc_index = desc_table[desc_index].next;
1444 map_guest_mem (vui, desc_table[desc_index].addr))))
1446 rxvq->last_used_idx -= hdr->num_buffers - 1;
1447 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1448 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1451 buffer_len = desc_table[desc_index].len;
1453 else if (vui->virtio_net_hdr_sz == 12) //MRG is available
1455 //Move from available to used buffer
1456 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id =
1458 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len =
1460 vhost_user_log_dirty_ring (vui, rxvq,
1461 ring[rxvq->last_used_idx &
1463 rxvq->last_avail_idx++;
1464 rxvq->last_used_idx++;
1468 (rxvq->last_avail_idx == rxvq->avail->idx))
1470 //Dequeue queued descriptors for this packet
1471 rxvq->last_used_idx -= hdr->num_buffers - 1;
1472 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1473 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1477 desc_table = rxvq->desc;
1478 desc_head = desc_index =
1479 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1481 (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
1483 //It is seriously unlikely that a driver will put indirect descriptor
1484 //after non-indirect descriptor.
1486 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1488 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1494 rxvq->desc[desc_index].addr))))
1496 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1504 map_guest_mem (vui, desc_table[desc_index].addr))))
1506 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1509 buffer_len = desc_table[desc_index].len;
1510 CLIB_PREFETCH (buffer_addr,
1511 clib_min (buffer_len,
1512 2 * CLIB_CACHE_LINE_BYTES), STORE);
1516 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
1521 u16 bytes_to_copy = bytes_left;
1523 (bytes_to_copy > buffer_len) ? buffer_len : bytes_to_copy;
1524 clib_memcpy (buffer_addr,
1525 vlib_buffer_get_current (current_b0) +
1526 current_b0->current_length - bytes_left,
1529 vhost_user_log_dirty_pages (vui,
1530 desc_table[desc_index].addr +
1531 desc_table[desc_index].len -
1532 bytes_left - bytes_to_copy,
1535 bytes_left -= bytes_to_copy;
1536 buffer_len -= bytes_to_copy;
1537 buffer_addr += bytes_to_copy;
1538 desc_len += bytes_to_copy;
1541 if (PREDICT_TRUE (n_left >= 2))
1543 vlib_prefetch_buffer_with_index (vm, buffers[1], STORE);
1544 CLIB_PREFETCH (&n_left, sizeof (n_left), STORE);
1547 //Move from available to used ring
1548 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id = desc_head;
1549 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len = desc_len;
1550 vhost_user_log_dirty_ring (vui, rxvq,
1551 ring[rxvq->last_used_idx & qsz_mask]);
1553 rxvq->last_avail_idx++;
1554 rxvq->last_used_idx++;
1556 n_left--; //At the end for error counting when 'goto done' is invoked
1560 CLIB_MEMORY_BARRIER ();
1561 rxvq->used->idx = rxvq->last_used_idx;
1562 vhost_user_log_dirty_ring (vui, rxvq, idx);
1564 /* interrupt (call) handling */
1565 if ((rxvq->callfd > 0) && !(rxvq->avail->flags & 1))
1567 rxvq->n_since_last_int += n_packets - n_left;
1569 if (rxvq->n_since_last_int > vum->coalesce_frames)
1570 vhost_user_send_call (vm, rxvq);
1575 if (PREDICT_FALSE (vui->lockp != 0))
1578 if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
1580 vlib_error_count (vm, node->node_index, error, n_left);
1581 vlib_increment_simple_counter
1582 (vnet_main.interface_main.sw_if_counters
1583 + VNET_INTERFACE_COUNTER_DROP,
1584 os_get_cpu_number (), vui->sw_if_index, n_left);
1587 vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
1588 return frame->n_vectors;
1591 static clib_error_t *
1592 vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
1595 vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
1596 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1597 vhost_user_main_t *vum = &vhost_user_main;
1598 vhost_user_intf_t *vui =
1599 vec_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
1601 vui->admin_up = is_up;
1604 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
1605 VNET_HW_INTERFACE_FLAG_LINK_UP);
1607 return /* no error */ 0;
1611 VNET_DEVICE_CLASS (vhost_user_dev_class,static) = {
1612 .name = "vhost-user",
1613 .tx_function = vhost_user_intfc_tx,
1614 .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
1615 .tx_function_error_strings = vhost_user_tx_func_error_strings,
1616 .format_device_name = format_vhost_user_interface_name,
1617 .name_renumber = vhost_user_name_renumber,
1618 .admin_up_down_function = vhost_user_interface_admin_up_down,
1619 .no_flatten_output_chains = 1,
1622 VLIB_DEVICE_TX_FUNCTION_MULTIARCH (vhost_user_dev_class,
1623 vhost_user_intfc_tx)
1627 vhost_user_process (vlib_main_t * vm,
1628 vlib_node_runtime_t * rt, vlib_frame_t * f)
1630 vhost_user_main_t *vum = &vhost_user_main;
1631 vhost_user_intf_t *vui;
1632 struct sockaddr_un sun;
1634 unix_file_t template = { 0 };
1635 f64 timeout = 3153600000.0 /* 100 years */ ;
1636 uword *event_data = 0;
1638 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1639 sun.sun_family = AF_UNIX;
1640 template.read_function = vhost_user_socket_read;
1641 template.error_function = vhost_user_socket_error;
1649 vlib_process_wait_for_event_or_clock (vm, timeout);
1650 vlib_process_get_events (vm, &event_data);
1651 vec_reset_length (event_data);
1655 vec_foreach (vui, vum->vhost_user_interfaces)
1658 if (vui->sock_is_server || !vui->active)
1661 if (vui->unix_fd == -1)
1663 /* try to connect */
1665 strncpy (sun.sun_path, (char *) vui->sock_filename,
1666 sizeof (sun.sun_path) - 1);
1669 (sockfd, (struct sockaddr *) &sun,
1670 sizeof (struct sockaddr_un)) == 0)
1672 vui->sock_errno = 0;
1673 vui->unix_fd = sockfd;
1674 template.file_descriptor = sockfd;
1675 vui->unix_file_index = unix_file_add (&unix_main, &template);
1676 hash_set (vum->vhost_user_interface_index_by_sock_fd, sockfd,
1677 vui - vum->vhost_user_interfaces);
1679 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1685 vui->sock_errno = errno;
1690 /* check if socket is alive */
1692 socklen_t len = sizeof (error);
1694 getsockopt (vui->unix_fd, SOL_SOCKET, SO_ERROR, &error, &len);
1697 vhost_user_if_disconnect (vui);
1705 VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
1706 .function = vhost_user_process,
1707 .type = VLIB_NODE_TYPE_PROCESS,
1708 .name = "vhost-user-process",
1713 vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
1715 vhost_user_main_t *vum = &vhost_user_main;
1716 vhost_user_intf_t *vui;
1720 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
1723 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1727 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
1730 // interface is inactive
1732 // disconnect interface sockets
1733 vhost_user_if_disconnect (vui);
1734 // add to inactive interface list
1735 vec_add1 (vum->vhost_user_inactive_interfaces_index, p[0]);
1737 // reset renumbered iface
1738 if (p[0] < vec_len (vum->show_dev_instance_by_real_dev_instance))
1739 vum->show_dev_instance_by_real_dev_instance[p[0]] = ~0;
1741 ethernet_delete_interface (vnm, vui->hw_if_index);
1742 DBG_SOCK ("deleted (deactivated) vhost-user interface instance %d", p[0]);
1747 // init server socket on specified sock_filename
1749 vhost_user_init_server_sock (const char *sock_filename, int *sockfd)
1752 struct sockaddr_un un = { };
1754 /* create listening socket */
1755 fd = socket (AF_UNIX, SOCK_STREAM, 0);
1759 return VNET_API_ERROR_SYSCALL_ERROR_1;
1762 un.sun_family = AF_UNIX;
1763 strncpy ((char *) un.sun_path, (char *) sock_filename,
1764 sizeof (un.sun_path) - 1);
1766 /* remove if exists */
1767 unlink ((char *) sock_filename);
1769 if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
1771 rv = VNET_API_ERROR_SYSCALL_ERROR_2;
1775 if (listen (fd, 1) == -1)
1777 rv = VNET_API_ERROR_SYSCALL_ERROR_3;
1781 unix_file_t template = { 0 };
1782 template.read_function = vhost_user_socksvr_accept_ready;
1783 template.file_descriptor = fd;
1784 unix_file_add (&unix_main, &template);
1793 // get new vhost_user_intf_t from inactive interfaces or create new one
1794 static vhost_user_intf_t *
1795 vhost_user_vui_new ()
1797 vhost_user_main_t *vum = &vhost_user_main;
1798 vhost_user_intf_t *vui = NULL;
1799 int inactive_cnt = vec_len (vum->vhost_user_inactive_interfaces_index);
1800 // if there are any inactive ifaces
1801 if (inactive_cnt > 0)
1805 vum->vhost_user_inactive_interfaces_index[inactive_cnt - 1];
1806 if (vec_len (vum->vhost_user_interfaces) > vui_idx)
1808 vui = vec_elt_at_index (vum->vhost_user_interfaces, vui_idx);
1809 DBG_SOCK ("reusing inactive vhost-user interface index %d",
1812 // "remove" from inactive list
1813 _vec_len (vum->vhost_user_inactive_interfaces_index) -= 1;
1816 // vui was not retrieved from inactive ifaces - create new
1818 vec_add2 (vum->vhost_user_interfaces, vui, 1);
1822 // create ethernet interface for vhost user intf
1824 vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
1825 vhost_user_intf_t * vui, u8 * hwaddress)
1827 vhost_user_main_t *vum = &vhost_user_main;
1829 clib_error_t *error;
1831 /* create hw and sw interface */
1834 clib_memcpy (hwaddr, hwaddress, 6);
1838 f64 now = vlib_time_now (vm);
1840 rnd = (u32) (now * 1e6);
1841 rnd = random_u32 (&rnd);
1843 clib_memcpy (hwaddr + 2, &rnd, sizeof (rnd));
1848 error = ethernet_register_interface
1850 vhost_user_dev_class.index,
1851 vui - vum->vhost_user_interfaces /* device instance */ ,
1852 hwaddr /* ethernet address */ ,
1853 &vui->hw_if_index, 0 /* flag change */ );
1855 clib_error_report (error);
1857 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, vui->hw_if_index);
1858 hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000;
1861 // initialize vui with specified attributes
1863 vhost_user_vui_init (vnet_main_t * vnm,
1864 vhost_user_intf_t * vui, int sockfd,
1865 const char *sock_filename,
1866 u8 is_server, u64 feature_mask, u32 * sw_if_index)
1868 vnet_sw_interface_t *sw;
1869 sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
1870 vlib_thread_main_t *tm = vlib_get_thread_main ();
1873 vui->unix_fd = sockfd;
1874 vui->sw_if_index = sw->sw_if_index;
1875 vui->num_vrings = 2;
1876 vui->sock_is_server = is_server;
1877 strncpy (vui->sock_filename, sock_filename,
1878 ARRAY_LEN (vui->sock_filename) - 1);
1879 vui->sock_errno = 0;
1881 vui->feature_mask = feature_mask;
1883 vui->unix_file_index = ~0;
1884 vui->log_base_addr = 0;
1886 for (q = 0; q < 2; q++)
1888 vui->vrings[q].enabled = 0;
1891 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
1894 *sw_if_index = vui->sw_if_index;
1896 if (tm->n_vlib_mains > 1)
1898 vui->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1899 CLIB_CACHE_LINE_BYTES);
1900 memset ((void *) vui->lockp, 0, CLIB_CACHE_LINE_BYTES);
1904 // register vui and start polling on it
1906 vhost_user_vui_register (vlib_main_t * vm, vhost_user_intf_t * vui)
1908 vhost_user_main_t *vum = &vhost_user_main;
1910 dpdk_main_t *dm = &dpdk_main;
1912 vlib_thread_main_t *tm = vlib_get_thread_main ();
1915 hash_set (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd,
1916 vui - vum->vhost_user_interfaces);
1917 hash_set (vum->vhost_user_interface_index_by_sw_if_index, vui->sw_if_index,
1918 vui - vum->vhost_user_interfaces);
1922 cpu_index = dm->input_cpu_first_index +
1923 (vui - vum->vhost_user_interfaces) % dm->input_cpu_count;
1925 if (tm->n_vlib_mains == 1)
1927 vlib_node_set_state (vm, vhost_user_input_node.index,
1928 VLIB_NODE_STATE_POLLING);
1931 vlib_node_set_state (vlib_mains[cpu_index], vhost_user_input_node.index,
1932 VLIB_NODE_STATE_POLLING);
1935 /* tell process to start polling for sockets */
1936 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1940 vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
1941 const char *sock_filename,
1945 u8 renumber, u32 custom_dev_instance, u8 * hwaddr)
1947 vhost_user_intf_t *vui = NULL;
1954 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
1960 vui = vhost_user_vui_new ();
1961 ASSERT (vui != NULL);
1963 vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
1964 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
1965 feature_mask, &sw_if_idx);
1969 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1972 vhost_user_vui_register (vm, vui);
1975 *sw_if_index = sw_if_idx;
1981 vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
1982 const char *sock_filename,
1985 u64 feature_mask, u8 renumber, u32 custom_dev_instance)
1987 vhost_user_main_t *vum = &vhost_user_main;
1988 vhost_user_intf_t *vui = NULL;
1994 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
1997 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
2001 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
2004 // interface is inactive
2006 // disconnect interface sockets
2007 vhost_user_if_disconnect (vui);
2011 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
2017 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
2018 feature_mask, &sw_if_idx);
2022 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
2025 vhost_user_vui_register (vm, vui);
2031 vhost_user_connect_command_fn (vlib_main_t * vm,
2032 unformat_input_t * input,
2033 vlib_cli_command_t * cmd)
2035 unformat_input_t _line_input, *line_input = &_line_input;
2036 u8 *sock_filename = NULL;
2039 u64 feature_mask = (u64) ~ 0;
2041 u32 custom_dev_instance = ~0;
2045 /* Get a line of input. */
2046 if (!unformat_user (input, unformat_line_input, line_input))
2049 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2051 if (unformat (line_input, "socket %s", &sock_filename))
2053 else if (unformat (line_input, "server"))
2055 else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
2059 (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
2061 else if (unformat (line_input, "renumber %d", &custom_dev_instance))
2066 return clib_error_return (0, "unknown input `%U'",
2067 format_unformat_error, input);
2069 unformat_free (line_input);
2071 vnet_main_t *vnm = vnet_get_main ();
2074 if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
2075 is_server, &sw_if_index, feature_mask,
2076 renumber, custom_dev_instance, hw)))
2078 vec_free (sock_filename);
2079 return clib_error_return (0, "vhost_user_create_if returned %d", rv);
2082 vec_free (sock_filename);
2083 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
2089 vhost_user_delete_command_fn (vlib_main_t * vm,
2090 unformat_input_t * input,
2091 vlib_cli_command_t * cmd)
2093 unformat_input_t _line_input, *line_input = &_line_input;
2094 u32 sw_if_index = ~0;
2096 /* Get a line of input. */
2097 if (!unformat_user (input, unformat_line_input, line_input))
2100 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2102 if (unformat (line_input, "sw_if_index %d", &sw_if_index))
2105 return clib_error_return (0, "unknown input `%U'",
2106 format_unformat_error, input);
2108 unformat_free (line_input);
2110 vnet_main_t *vnm = vnet_get_main ();
2112 vhost_user_delete_if (vnm, vm, sw_if_index);
2118 vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
2119 vhost_user_intf_details_t ** out_vuids)
2122 vhost_user_main_t *vum = &vhost_user_main;
2123 vhost_user_intf_t *vui;
2124 vhost_user_intf_details_t *r_vuids = NULL;
2125 vhost_user_intf_details_t *vuid = NULL;
2126 u32 *hw_if_indices = 0;
2127 vnet_hw_interface_t *hi;
2134 vec_foreach (vui, vum->vhost_user_interfaces)
2137 vec_add1 (hw_if_indices, vui->hw_if_index);
2140 for (i = 0; i < vec_len (hw_if_indices); i++)
2142 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2143 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2145 vec_add2 (r_vuids, vuid, 1);
2146 vuid->sw_if_index = vui->sw_if_index;
2147 vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
2148 vuid->features = vui->features;
2149 vuid->is_server = vui->sock_is_server;
2150 vuid->num_regions = vui->nregions;
2151 vuid->sock_errno = vui->sock_errno;
2152 strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
2153 ARRAY_LEN (vuid->sock_filename) - 1);
2155 s = format (s, "%v%c", hi->name, 0);
2157 strncpy ((char *) vuid->if_name, (char *) s,
2158 ARRAY_LEN (vuid->if_name) - 1);
2163 vec_free (hw_if_indices);
2165 *out_vuids = r_vuids;
2171 show_vhost_user_command_fn (vlib_main_t * vm,
2172 unformat_input_t * input,
2173 vlib_cli_command_t * cmd)
2175 clib_error_t *error = 0;
2176 vnet_main_t *vnm = vnet_get_main ();
2177 vhost_user_main_t *vum = &vhost_user_main;
2178 vhost_user_intf_t *vui;
2179 u32 hw_if_index, *hw_if_indices = 0;
2180 vnet_hw_interface_t *hi;
2188 struct feat_struct *feat_entry;
2190 static struct feat_struct feat_array[] = {
2191 #define _(s,b) { .str = #s, .bit = b, },
2192 foreach_virtio_net_feature
2197 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2200 (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
2202 vec_add1 (hw_if_indices, hw_if_index);
2203 vlib_cli_output (vm, "add %d", hw_if_index);
2205 else if (unformat (input, "descriptors") || unformat (input, "desc"))
2209 error = clib_error_return (0, "unknown input `%U'",
2210 format_unformat_error, input);
2214 if (vec_len (hw_if_indices) == 0)
2216 vec_foreach (vui, vum->vhost_user_interfaces)
2219 vec_add1 (hw_if_indices, vui->hw_if_index);
2222 vlib_cli_output (vm, "Virtio vhost-user interfaces");
2223 vlib_cli_output (vm, "Global:\n coalesce frames %d time %e\n\n",
2224 vum->coalesce_frames, vum->coalesce_time);
2226 for (i = 0; i < vec_len (hw_if_indices); i++)
2228 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2229 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2230 vlib_cli_output (vm, "Interface: %s (ifindex %d)",
2231 hi->name, hw_if_indices[i]);
2233 vlib_cli_output (vm, "virtio_net_hdr_sz %d\n features (0x%llx): \n",
2234 vui->virtio_net_hdr_sz, vui->features);
2236 feat_entry = (struct feat_struct *) &feat_array;
2237 while (feat_entry->str)
2239 if (vui->features & (1 << feat_entry->bit))
2240 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
2245 vlib_cli_output (vm, "\n");
2248 vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
2250 vui->sock_is_server ? "server" : "client",
2251 strerror (vui->sock_errno));
2253 vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
2257 vlib_cli_output (vm,
2258 " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
2259 vlib_cli_output (vm,
2260 " ====== ===== ================== ================== ================== ================== ==================\n");
2262 for (j = 0; j < vui->nregions; j++)
2264 vlib_cli_output (vm,
2265 " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
2266 j, vui->region_mmap_fd[j],
2267 vui->regions[j].guest_phys_addr,
2268 vui->regions[j].memory_size,
2269 vui->regions[j].userspace_addr,
2270 vui->regions[j].mmap_offset,
2271 pointer_to_uword (vui->region_mmap_addr[j]));
2273 for (q = 0; q < vui->num_vrings; q++)
2275 vlib_cli_output (vm, "\n Virtqueue %d\n", q);
2277 vlib_cli_output (vm,
2278 " qsz %d last_avail_idx %d last_used_idx %d\n",
2279 vui->vrings[q].qsz, vui->vrings[q].last_avail_idx,
2280 vui->vrings[q].last_used_idx);
2282 if (vui->vrings[q].avail && vui->vrings[q].used)
2283 vlib_cli_output (vm,
2284 " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
2285 vui->vrings[q].avail->flags,
2286 vui->vrings[q].avail->idx,
2287 vui->vrings[q].used->flags,
2288 vui->vrings[q].used->idx);
2290 vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
2291 vui->vrings[q].kickfd,
2292 vui->vrings[q].callfd, vui->vrings[q].errfd);
2296 vlib_cli_output (vm, "\n descriptor table:\n");
2297 vlib_cli_output (vm,
2298 " id addr len flags next user_addr\n");
2299 vlib_cli_output (vm,
2300 " ===== ================== ===== ====== ===== ==================\n");
2301 for (j = 0; j < vui->vrings[q].qsz; j++)
2303 vlib_cli_output (vm,
2304 " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
2305 j, vui->vrings[q].desc[j].addr,
2306 vui->vrings[q].desc[j].len,
2307 vui->vrings[q].desc[j].flags,
2308 vui->vrings[q].desc[j].next,
2309 pointer_to_uword (map_guest_mem
2311 vui->vrings[q].desc[j].
2316 vlib_cli_output (vm, "\n");
2319 vec_free (hw_if_indices);
2329 VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
2330 .path = "create vhost-user",
2331 .short_help = "create vhost-user socket <socket-filename> [server] [feature-mask <hex>] [renumber <dev_instance>]",
2332 .function = vhost_user_connect_command_fn,
2335 VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
2336 .path = "delete vhost-user",
2337 .short_help = "delete vhost-user sw_if_index <nn>",
2338 .function = vhost_user_delete_command_fn,
2341 VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
2342 .path = "show vhost-user",
2343 .short_help = "show vhost-user interface",
2344 .function = show_vhost_user_command_fn,
2349 static clib_error_t *
2350 vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
2352 vhost_user_main_t *vum = &vhost_user_main;
2354 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2356 if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
2358 else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
2360 else if (unformat (input, "dont-dump-memory"))
2361 vum->dont_dump_vhost_user_memory = 1;
2363 return clib_error_return (0, "unknown input `%U'",
2364 format_unformat_error, input);
2370 /* vhost-user { ... } configuration. */
2371 VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
2374 vhost_user_unmap_all (void)
2376 vhost_user_main_t *vum = &vhost_user_main;
2377 vhost_user_intf_t *vui;
2379 if (vum->dont_dump_vhost_user_memory)
2381 vec_foreach (vui, vum->vhost_user_interfaces)
2383 unmap_all_mem_regions (vui);
2389 * fd.io coding-style-patch-verification: ON
2392 * eval: (c-set-style "gnu")