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 close (vui->unix_fd);
258 hash_unset (vum->vhost_user_interface_index_by_sock_fd, vui->unix_fd);
259 hash_unset (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd);
262 for (q = 0; q < vui->num_vrings; q++)
264 vui->vrings[q].desc = NULL;
265 vui->vrings[q].avail = NULL;
266 vui->vrings[q].used = NULL;
267 vui->vrings[q].log_guest_addr = 0;
268 vui->vrings[q].log_used = 0;
271 unmap_all_mem_regions (vui);
272 DBG_SOCK ("interface ifindex %d disconnected", vui->sw_if_index);
275 #define VHOST_LOG_PAGE 0x1000
277 vhost_user_log_dirty_pages (vhost_user_intf_t * vui, u64 addr, u64 len)
279 if (PREDICT_TRUE (vui->log_base_addr == 0
280 || !(vui->features & (1 << FEAT_VHOST_F_LOG_ALL))))
284 if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
286 DBG_SOCK ("vhost_user_log_dirty_pages(): out of range\n");
290 CLIB_MEMORY_BARRIER ();
291 u64 page = addr / VHOST_LOG_PAGE;
292 while (page * VHOST_LOG_PAGE < addr + len)
294 ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
299 #define vhost_user_log_dirty_ring(vui, vq, member) \
300 if (PREDICT_FALSE(vq->log_used)) { \
301 vhost_user_log_dirty_pages(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
302 sizeof(vq->used->member)); \
305 static clib_error_t *
306 vhost_user_socket_read (unix_file_t * uf)
309 int fd, number_of_fds = 0;
310 int fds[VHOST_MEMORY_MAX_NREGIONS];
311 vhost_user_msg_t msg;
314 vhost_user_main_t *vum = &vhost_user_main;
315 vhost_user_intf_t *vui;
316 struct cmsghdr *cmsg;
319 unix_file_t template = { 0 };
320 vnet_main_t *vnm = vnet_get_main ();
322 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
323 uf->file_descriptor);
326 DBG_SOCK ("FD %d doesn't belong to any interface", uf->file_descriptor);
330 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
332 char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
334 memset (&mh, 0, sizeof (mh));
335 memset (control, 0, sizeof (control));
337 for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
340 /* set the payload */
341 iov[0].iov_base = (void *) &msg;
342 iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
346 mh.msg_control = control;
347 mh.msg_controllen = sizeof (control);
349 n = recvmsg (uf->file_descriptor, &mh, 0);
351 if (n != VHOST_USER_MSG_HDR_SZ)
354 if (mh.msg_flags & MSG_CTRUNC)
359 cmsg = CMSG_FIRSTHDR (&mh);
361 if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
362 (cmsg->cmsg_type == SCM_RIGHTS) &&
363 (cmsg->cmsg_len - CMSG_LEN (0) <=
364 VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
366 number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
367 clib_memcpy (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
370 /* version 1, no reply bit set */
371 if ((msg.flags & 7) != 1)
373 DBG_SOCK ("malformed message received. closing socket");
378 int rv __attribute__ ((unused));
379 /* $$$$ pay attention to rv */
380 rv = read (uf->file_descriptor, ((char *) &msg) + n, msg.size);
385 case VHOST_USER_GET_FEATURES:
386 DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES", vui->hw_if_index);
389 msg.u64 = (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
390 (1 << FEAT_VIRTIO_F_ANY_LAYOUT) |
391 (1 << FEAT_VIRTIO_F_INDIRECT_DESC) |
392 (1 << FEAT_VHOST_F_LOG_ALL) |
393 (1 << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
394 (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES) |
395 (1UL << FEAT_VIRTIO_F_VERSION_1);
396 msg.u64 &= vui->feature_mask;
398 msg.size = sizeof (msg.u64);
401 case VHOST_USER_SET_FEATURES:
402 DBG_SOCK ("if %d msg VHOST_USER_SET_FEATURES features 0x%016llx",
403 vui->hw_if_index, msg.u64);
405 vui->features = msg.u64;
407 if (vui->features & (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF))
408 vui->virtio_net_hdr_sz = 12;
410 vui->virtio_net_hdr_sz = 10;
413 (vui->features & (1 << FEAT_VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
415 ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
416 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
419 for (q = 0; q < 2; q++)
421 vui->vrings[q].desc = 0;
422 vui->vrings[q].avail = 0;
423 vui->vrings[q].used = 0;
424 vui->vrings[q].log_guest_addr = 0;
425 vui->vrings[q].log_used = 0;
428 DBG_SOCK ("interface %d disconnected", vui->sw_if_index);
432 case VHOST_USER_SET_MEM_TABLE:
433 DBG_SOCK ("if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
434 vui->hw_if_index, msg.memory.nregions);
436 if ((msg.memory.nregions < 1) ||
437 (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
440 DBG_SOCK ("number of mem regions must be between 1 and %i",
441 VHOST_MEMORY_MAX_NREGIONS);
446 if (msg.memory.nregions != number_of_fds)
448 DBG_SOCK ("each memory region must have FD");
451 unmap_all_mem_regions (vui);
452 for (i = 0; i < msg.memory.nregions; i++)
454 clib_memcpy (&(vui->regions[i]), &msg.memory.regions[i],
455 sizeof (vhost_user_memory_region_t));
457 long page_sz = get_huge_page_size (fds[i]);
459 /* align size to 2M page */
460 ssize_t map_sz = (vui->regions[i].memory_size +
461 vui->regions[i].mmap_offset +
462 page_sz) & ~(page_sz - 1);
464 vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
465 MAP_SHARED, fds[i], 0);
468 ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
469 "page_sz 0x%x", i, map_sz, fds[i], vui->region_mmap_addr[i],
472 if (vui->region_mmap_addr[i] == MAP_FAILED)
474 clib_warning ("failed to map memory. errno is %d", errno);
477 vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
478 vui->region_mmap_fd[i] = fds[i];
480 vui->nregions = msg.memory.nregions;
483 case VHOST_USER_SET_VRING_NUM:
484 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
485 vui->hw_if_index, msg.state.index, msg.state.num);
487 if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
488 (msg.state.num == 0) || /* it cannot be zero */
489 (msg.state.num % 2)) /* must be power of 2 */
491 vui->vrings[msg.state.index].qsz = msg.state.num;
494 case VHOST_USER_SET_VRING_ADDR:
495 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
496 vui->hw_if_index, msg.state.index);
498 vui->vrings[msg.state.index].desc = (vring_desc_t *)
499 map_user_mem (vui, msg.addr.desc_user_addr);
500 vui->vrings[msg.state.index].used = (vring_used_t *)
501 map_user_mem (vui, msg.addr.used_user_addr);
502 vui->vrings[msg.state.index].avail = (vring_avail_t *)
503 map_user_mem (vui, msg.addr.avail_user_addr);
505 if ((vui->vrings[msg.state.index].desc == NULL) ||
506 (vui->vrings[msg.state.index].used == NULL) ||
507 (vui->vrings[msg.state.index].avail == NULL))
509 DBG_SOCK ("failed to map user memory for hw_if_index %d",
514 vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
515 vui->vrings[msg.state.index].log_used =
516 (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
518 /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
519 the ring is initialized in an enabled state. */
521 if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
523 vui->vrings[msg.state.index].enabled = 1;
526 vui->vrings[msg.state.index].last_used_idx =
527 vui->vrings[msg.state.index].used->idx;
529 /* tell driver that we don't want interrupts */
530 vui->vrings[msg.state.index].used->flags |= 1;
533 case VHOST_USER_SET_OWNER:
534 DBG_SOCK ("if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
537 case VHOST_USER_RESET_OWNER:
538 DBG_SOCK ("if %d msg VHOST_USER_RESET_OWNER", vui->hw_if_index);
541 case VHOST_USER_SET_VRING_CALL:
542 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_CALL u64 %d",
543 vui->hw_if_index, msg.u64);
545 q = (u8) (msg.u64 & 0xFF);
547 if (!(msg.u64 & 0x100))
549 if (number_of_fds != 1)
552 /* if there is old fd, delete it */
553 if (vui->vrings[q].callfd)
555 unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
556 vui->vrings[q].callfd_idx);
557 unix_file_del (&unix_main, uf);
559 vui->vrings[q].callfd = fds[0];
560 template.read_function = vhost_user_callfd_read_ready;
561 template.file_descriptor = fds[0];
562 vui->vrings[q].callfd_idx = unix_file_add (&unix_main, &template);
565 vui->vrings[q].callfd = -1;
568 case VHOST_USER_SET_VRING_KICK:
569 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_KICK u64 %d",
570 vui->hw_if_index, msg.u64);
572 q = (u8) (msg.u64 & 0xFF);
574 if (!(msg.u64 & 0x100))
576 if (number_of_fds != 1)
579 vui->vrings[q].kickfd = fds[0];
582 vui->vrings[q].kickfd = -1;
585 case VHOST_USER_SET_VRING_ERR:
586 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ERR u64 %d",
587 vui->hw_if_index, msg.u64);
589 q = (u8) (msg.u64 & 0xFF);
591 if (!(msg.u64 & 0x100))
593 if (number_of_fds != 1)
601 vui->vrings[q].errfd = fd;
604 case VHOST_USER_SET_VRING_BASE:
605 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
606 vui->hw_if_index, msg.state.index, msg.state.num);
608 vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
611 case VHOST_USER_GET_VRING_BASE:
612 DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
613 vui->hw_if_index, msg.state.index, msg.state.num);
615 /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
616 vui->vrings[msg.state.index].enabled = 0;
618 msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
620 msg.size = sizeof (msg.state);
623 case VHOST_USER_NONE:
624 DBG_SOCK ("if %d msg VHOST_USER_NONE", vui->hw_if_index);
628 case VHOST_USER_SET_LOG_BASE:
630 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_BASE", vui->hw_if_index);
632 if (msg.size != sizeof (msg.log))
635 ("invalid msg size for VHOST_USER_SET_LOG_BASE: %d instead of %d",
636 msg.size, sizeof (msg.log));
641 (vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
644 ("VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but VHOST_USER_SET_LOG_BASE received");
649 /* align size to 2M page */
650 long page_sz = get_huge_page_size (fd);
652 (msg.log.size + msg.log.offset + page_sz) & ~(page_sz - 1);
654 vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
658 ("map log region addr 0 len 0x%lx off 0x%lx fd %d mapped 0x%lx",
659 map_sz, msg.log.offset, fd, vui->log_base_addr);
661 if (vui->log_base_addr == MAP_FAILED)
663 clib_warning ("failed to map memory. errno is %d", errno);
667 vui->log_base_addr += msg.log.offset;
668 vui->log_size = msg.log.size;
671 msg.size = sizeof (msg.u64);
676 case VHOST_USER_SET_LOG_FD:
677 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
681 case VHOST_USER_GET_PROTOCOL_FEATURES:
682 DBG_SOCK ("if %d msg VHOST_USER_GET_PROTOCOL_FEATURES",
686 msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD);
687 msg.size = sizeof (msg.u64);
690 case VHOST_USER_SET_PROTOCOL_FEATURES:
691 DBG_SOCK ("if %d msg VHOST_USER_SET_PROTOCOL_FEATURES features 0x%lx",
692 vui->hw_if_index, msg.u64);
694 vui->protocol_features = msg.u64;
698 case VHOST_USER_SET_VRING_ENABLE:
699 DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE, enable: %d",
700 vui->hw_if_index, msg.state.num);
701 vui->vrings[msg.state.index].enabled = msg.state.num;
705 DBG_SOCK ("unknown vhost-user message %d received. closing socket",
710 /* if we have pointers to descriptor table, go up */
712 vui->vrings[VHOST_NET_VRING_IDX_TX].desc &&
713 vui->vrings[VHOST_NET_VRING_IDX_RX].desc)
716 DBG_SOCK ("interface %d connected", vui->sw_if_index);
718 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
719 VNET_HW_INTERFACE_FLAG_LINK_UP);
724 /* if we need to reply */
728 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
729 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
736 vhost_user_if_disconnect (vui);
740 static clib_error_t *
741 vhost_user_socket_error (unix_file_t * uf)
743 vhost_user_main_t *vum = &vhost_user_main;
744 vhost_user_intf_t *vui;
747 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
748 uf->file_descriptor);
751 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
755 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
757 vhost_user_if_disconnect (vui);
761 static clib_error_t *
762 vhost_user_socksvr_accept_ready (unix_file_t * uf)
764 int client_fd, client_len;
765 struct sockaddr_un client;
766 unix_file_t template = { 0 };
767 vhost_user_main_t *vum = &vhost_user_main;
768 vhost_user_intf_t *vui;
771 p = hash_get (vum->vhost_user_interface_index_by_listener_fd,
772 uf->file_descriptor);
775 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
779 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
781 client_len = sizeof (client);
782 client_fd = accept (uf->file_descriptor,
783 (struct sockaddr *) &client,
784 (socklen_t *) & client_len);
787 return clib_error_return_unix (0, "accept");
789 template.read_function = vhost_user_socket_read;
790 template.error_function = vhost_user_socket_error;
791 template.file_descriptor = client_fd;
792 vui->unix_file_index = unix_file_add (&unix_main, &template);
794 vui->client_fd = client_fd;
795 hash_set (vum->vhost_user_interface_index_by_sock_fd, vui->client_fd,
796 vui - vum->vhost_user_interfaces);
801 static clib_error_t *
802 vhost_user_init (vlib_main_t * vm)
805 vhost_user_main_t *vum = &vhost_user_main;
806 vlib_thread_main_t *tm = vlib_get_thread_main ();
807 vlib_thread_registration_t *tr;
810 error = vlib_call_init_function (vm, ip4_init);
814 vum->vhost_user_interface_index_by_listener_fd =
815 hash_create (0, sizeof (uword));
816 vum->vhost_user_interface_index_by_sock_fd =
817 hash_create (0, sizeof (uword));
818 vum->vhost_user_interface_index_by_sw_if_index =
819 hash_create (0, sizeof (uword));
820 vum->coalesce_frames = 32;
821 vum->coalesce_time = 1e-3;
823 vec_validate_aligned (vum->rx_buffers, tm->n_vlib_mains - 1,
824 CLIB_CACHE_LINE_BYTES);
826 /* find out which cpus will be used for input */
827 vum->input_cpu_first_index = 0;
828 vum->input_cpu_count = 1;
829 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
830 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
832 if (tr && tr->count > 0)
834 vum->input_cpu_first_index = tr->first_index;
835 vum->input_cpu_count = tr->count;
841 VLIB_INIT_FUNCTION (vhost_user_init);
843 static clib_error_t *
844 vhost_user_exit (vlib_main_t * vm)
850 VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
854 VHOST_USER_RX_NEXT_ETHERNET_INPUT,
855 VHOST_USER_RX_NEXT_DROP,
856 VHOST_USER_RX_N_NEXT,
864 #if VHOST_USER_COPY_TX_HDR == 1
865 virtio_net_hdr_t hdr;
867 } vhost_user_input_trace_t;
870 format_vhost_user_input_trace (u8 * s, va_list * va)
872 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
873 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
874 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
875 vhost_user_main_t *vum = &vhost_user_main;
876 vhost_user_input_trace_t *t = va_arg (*va, vhost_user_input_trace_t *);
877 vhost_user_intf_t *vui = vec_elt_at_index (vum->vhost_user_interfaces,
880 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
882 #if VHOST_USER_COPY_TX_HDR == 1
883 uword indent = format_get_indent (s);
886 s = format (s, "%U virtqueue %d",
887 format_vnet_sw_interface_name, vnm, sw, t->virtqueue);
889 #if VHOST_USER_COPY_TX_HDR == 1
890 s = format (s, "\n%Uvirtio_net_hdr flags 0x%02x gso_type %u hdr_len %u",
891 format_white_space, indent,
892 t->hdr.flags, t->hdr.gso_type, t->hdr.hdr_len);
899 vhost_user_rx_trace (vlib_main_t * vm,
900 vlib_node_runtime_t * node,
901 vhost_user_intf_t * vui, i16 virtqueue)
904 vhost_user_main_t *vum = &vhost_user_main;
906 u32 next_index = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
908 n_left = vec_len (vui->d_trace_buffers);
909 b = vui->d_trace_buffers;
915 vhost_user_input_trace_t *t0;
920 b0 = vlib_get_buffer (vm, bi0);
921 vlib_trace_buffer (vm, node, next_index, b0, /* follow_chain */ 0);
922 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
923 t0->virtqueue = virtqueue;
924 t0->device_index = vui - vum->vhost_user_interfaces;
925 #if VHOST_USER_COPY_TX_HDR == 1
926 clib_memcpy (&t0->hdr, b0->pre_data, sizeof (virtio_net_hdr_t));
934 vhost_user_send_call (vlib_main_t * vm, vhost_user_vring_t * vq)
936 vhost_user_main_t *vum = &vhost_user_main;
938 int rv __attribute__ ((unused));
939 /* $$$$ pay attention to rv */
940 rv = write (vq->callfd, &x, sizeof (x));
941 vq->n_since_last_int = 0;
942 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
947 vhost_user_if_input (vlib_main_t * vm,
948 vhost_user_main_t * vum,
949 vhost_user_intf_t * vui, vlib_node_runtime_t * node)
951 vhost_user_vring_t *txvq = &vui->vrings[VHOST_NET_VRING_IDX_TX];
952 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
953 uword n_rx_packets = 0, n_rx_bytes = 0;
955 u32 n_left_to_next, *to_next;
958 uword n_trace = vlib_get_trace_count (vm, node);
960 u32 cpu_index, rx_len, drops, flush;
961 f64 now = vlib_time_now (vm);
963 vec_reset_length (vui->d_trace_buffers);
965 /* no descriptor ptr - bail out */
966 if (PREDICT_FALSE (!txvq->desc || !txvq->avail || !txvq->enabled))
969 /* do we have pending intterupts ? */
970 if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
971 vhost_user_send_call (vm, txvq);
973 if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
974 vhost_user_send_call (vm, rxvq);
976 /* only bit 0 of avail.flags is used so we don't want to deal with this
977 interface if any other bit is set */
978 if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
981 n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
984 if (PREDICT_FALSE (n_left == 0))
987 if (PREDICT_FALSE (n_left == txvq->qsz))
989 //Informational error logging when VPP is not receiving packets fast enough
990 vlib_error_count (vm, node->node_index,
991 VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
994 if (PREDICT_FALSE (!vui->admin_up))
996 /* if intf is admin down, just drop all packets waiting in the ring */
997 txvq->last_avail_idx = txvq->last_used_idx = txvq->avail->idx;
998 CLIB_MEMORY_BARRIER ();
999 txvq->used->idx = txvq->last_used_idx;
1000 vhost_user_log_dirty_ring (vui, txvq, idx);
1001 vhost_user_send_call (vm, txvq);
1005 qsz_mask = txvq->qsz - 1;
1006 cpu_index = os_get_cpu_number ();
1010 if (n_left > VLIB_FRAME_SIZE)
1011 n_left = VLIB_FRAME_SIZE;
1013 /* Allocate some buffers.
1014 * Note that buffers that are chained for jumbo
1015 * frames are allocated separately using a slower path.
1016 * The idea is to be certain to have enough buffers at least
1017 * to cycle through the descriptors without having to check for errors.
1018 * For jumbo frames, the bottleneck is memory copy anyway.
1020 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1022 vec_alloc (vum->rx_buffers[cpu_index], 2 * VLIB_FRAME_SIZE);
1024 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1025 flush = n_left; //Drop all input
1028 if (PREDICT_FALSE (_vec_len (vum->rx_buffers[cpu_index]) < n_left))
1030 u32 curr_len = _vec_len (vum->rx_buffers[cpu_index]);
1031 _vec_len (vum->rx_buffers[cpu_index]) +=
1032 vlib_buffer_alloc_from_free_list (vm,
1033 vum->rx_buffers[cpu_index] +
1035 2 * VLIB_FRAME_SIZE - curr_len,
1036 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
1038 if (PREDICT_FALSE (n_left > _vec_len (vum->rx_buffers[cpu_index])))
1039 flush = n_left - _vec_len (vum->rx_buffers[cpu_index]);
1042 if (PREDICT_FALSE (flush))
1044 //Remove some input buffers
1047 vlib_error_count (vm, vhost_user_input_node.index,
1048 VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
1051 u16 desc_chain_head =
1052 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1053 txvq->last_avail_idx++;
1054 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1056 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1057 vhost_user_log_dirty_ring (vui, txvq,
1058 ring[txvq->last_used_idx & qsz_mask]);
1059 txvq->last_used_idx++;
1064 rx_len = vec_len (vum->rx_buffers[cpu_index]); //vector might be null
1067 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1069 while (n_left > 0 && n_left_to_next > 0)
1071 vlib_buffer_t *b_head, *b_current;
1072 u32 bi_head, bi_current;
1073 u16 desc_chain_head, desc_current;
1074 u8 error = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
1076 if (PREDICT_TRUE (n_left > 1))
1079 txvq->avail->ring[(txvq->last_avail_idx + 1) & qsz_mask];
1081 map_guest_mem (vui, txvq->desc[next_desc].addr);
1082 if (PREDICT_TRUE (buffer_addr != 0))
1083 CLIB_PREFETCH (buffer_addr, 64, STORE);
1085 u32 bi = vum->rx_buffers[cpu_index][rx_len - 2];
1086 vlib_prefetch_buffer_with_index (vm, bi, STORE);
1087 CLIB_PREFETCH (vlib_get_buffer (vm, bi)->data, 128, STORE);
1090 desc_chain_head = desc_current =
1091 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1092 bi_head = bi_current = vum->rx_buffers[cpu_index][--rx_len];
1093 b_head = b_current = vlib_get_buffer (vm, bi_head);
1094 vlib_buffer_chain_init (b_head);
1097 if (PREDICT_TRUE (vui->is_any_layout) ||
1098 (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
1099 !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)))
1101 /* ANYLAYOUT or single buffer */
1102 offset = vui->virtio_net_hdr_sz;
1106 /* CSR case without ANYLAYOUT, skip 1st buffer */
1107 offset = txvq->desc[desc_current].len;
1110 vring_desc_t *desc_table = txvq->desc;
1111 u32 desc_index = desc_current;
1113 if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
1115 desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr);
1117 if (PREDICT_FALSE (desc_table == 0))
1119 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1127 map_guest_mem (vui, desc_table[desc_index].addr);
1128 if (PREDICT_FALSE (buffer_addr == 0))
1130 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1135 (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1137 CLIB_PREFETCH (&desc_table[desc_table[desc_index].next],
1138 sizeof (vring_desc_t), STORE);
1141 #if VHOST_USER_COPY_TX_HDR == 1
1142 if (PREDICT_TRUE (offset))
1143 clib_memcpy (b->pre_data, buffer_addr, sizeof (virtio_net_hdr_t)); /* 12 byte hdr is not used on tx */
1146 if (desc_table[desc_index].len > offset)
1148 u16 len = desc_table[desc_index].len - offset;
1149 u16 copied = vlib_buffer_chain_append_data_with_alloc (vm,
1150 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
1159 error = VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER;
1165 /* if next flag is set, take next desc in the chain */
1166 if ((desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1167 desc_index = desc_table[desc_index].next;
1173 /* consume the descriptor and return it as used */
1174 txvq->last_avail_idx++;
1175 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1177 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1178 vhost_user_log_dirty_ring (vui, txvq,
1179 ring[txvq->last_used_idx & qsz_mask]);
1180 txvq->last_used_idx++;
1182 //It is important to free RX as fast as possible such that the TX
1183 //process does not drop packets
1184 if ((txvq->last_used_idx & 0x3f) == 0) // Every 64 packets
1185 txvq->used->idx = txvq->last_used_idx;
1187 if (PREDICT_FALSE (b_head->current_length < 14 &&
1188 error == VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
1189 error = VHOST_USER_INPUT_FUNC_ERROR_UNDERSIZED_FRAME;
1191 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
1193 vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
1194 vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1195 b_head->error = node->errors[error];
1197 if (PREDICT_FALSE (n_trace > n_rx_packets))
1198 vec_add1 (vui->d_trace_buffers, bi_head);
1200 if (PREDICT_FALSE (error))
1203 next0 = VHOST_USER_RX_NEXT_DROP;
1208 b_head->current_length +
1209 b_head->total_length_not_including_first_buffer;
1211 next0 = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
1214 to_next[0] = bi_head;
1217 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1218 to_next, n_left_to_next,
1223 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1227 if (PREDICT_TRUE (vum->rx_buffers[cpu_index] != 0))
1228 _vec_len (vum->rx_buffers[cpu_index]) = rx_len;
1230 /* give buffers back to driver */
1231 CLIB_MEMORY_BARRIER ();
1232 txvq->used->idx = txvq->last_used_idx;
1233 vhost_user_log_dirty_ring (vui, txvq, idx);
1235 if (PREDICT_FALSE (vec_len (vui->d_trace_buffers) > 0))
1237 vhost_user_rx_trace (vm, node, vui, VHOST_NET_VRING_IDX_TX);
1238 vlib_set_trace_count (vm, node,
1239 n_trace - vec_len (vui->d_trace_buffers));
1242 /* interrupt (call) handling */
1243 if ((txvq->callfd > 0) && !(txvq->avail->flags & 1))
1245 txvq->n_since_last_int += n_rx_packets;
1247 if (txvq->n_since_last_int > vum->coalesce_frames)
1248 vhost_user_send_call (vm, txvq);
1251 if (PREDICT_FALSE (drops))
1253 vlib_increment_simple_counter
1254 (vnet_main.interface_main.sw_if_counters
1255 + VNET_INTERFACE_COUNTER_DROP, os_get_cpu_number (),
1256 vui->sw_if_index, drops);
1259 /* increase rx counters */
1260 vlib_increment_combined_counter
1261 (vnet_main.interface_main.combined_sw_if_counters
1262 + VNET_INTERFACE_COUNTER_RX,
1263 os_get_cpu_number (), vui->sw_if_index, n_rx_packets, n_rx_bytes);
1265 return n_rx_packets;
1269 vhost_user_input (vlib_main_t * vm,
1270 vlib_node_runtime_t * node, vlib_frame_t * f)
1272 vhost_user_main_t *vum = &vhost_user_main;
1273 u32 cpu_index = os_get_cpu_number ();
1274 vhost_user_intf_t *vui;
1275 uword n_rx_packets = 0;
1278 for (i = 0; i < vec_len (vum->vhost_user_interfaces); i++)
1280 vui = vec_elt_at_index (vum->vhost_user_interfaces, i);
1283 if ((i % vum->input_cpu_count) ==
1284 (cpu_index - vum->input_cpu_first_index))
1285 n_rx_packets += vhost_user_if_input (vm, vum, vui, node);
1288 return n_rx_packets;
1292 VLIB_REGISTER_NODE (vhost_user_input_node) = {
1293 .function = vhost_user_input,
1294 .type = VLIB_NODE_TYPE_INPUT,
1295 .name = "vhost-user-input",
1297 /* Will be enabled if/when hardware is detected. */
1298 .state = VLIB_NODE_STATE_DISABLED,
1300 .format_buffer = format_ethernet_header_with_length,
1301 .format_trace = format_vhost_user_input_trace,
1303 .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
1304 .error_strings = vhost_user_input_func_error_strings,
1306 .n_next_nodes = VHOST_USER_RX_N_NEXT,
1308 [VHOST_USER_RX_NEXT_DROP] = "error-drop",
1309 [VHOST_USER_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
1313 VLIB_NODE_FUNCTION_MULTIARCH (vhost_user_input_node, vhost_user_input)
1317 vhost_user_intfc_tx (vlib_main_t * vm,
1318 vlib_node_runtime_t * node, vlib_frame_t * frame)
1320 u32 *buffers = vlib_frame_args (frame);
1322 vhost_user_main_t *vum = &vhost_user_main;
1323 uword n_packets = 0;
1324 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
1325 vhost_user_intf_t *vui =
1326 vec_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
1327 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
1329 u8 error = VHOST_USER_TX_FUNC_ERROR_NONE;
1331 n_left = n_packets = frame->n_vectors;
1333 if (PREDICT_FALSE (!vui->is_up))
1337 (!rxvq->desc || !rxvq->avail || vui->sock_errno != 0 || !rxvq->enabled))
1339 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1343 if (PREDICT_FALSE (vui->lockp != 0))
1345 while (__sync_lock_test_and_set (vui->lockp, 1))
1349 /* only bit 0 of avail.flags is used so we don't want to deal with this
1350 interface if any other bit is set */
1351 if (PREDICT_FALSE (rxvq->avail->flags & 0xFFFE))
1353 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1357 if (PREDICT_FALSE ((rxvq->avail->idx == rxvq->last_avail_idx)))
1359 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1363 qsz_mask = rxvq->qsz - 1; /* qsz is always power of 2 */
1367 vlib_buffer_t *b0, *current_b0;
1368 u16 desc_head, desc_index, desc_len;
1369 vring_desc_t *desc_table;
1373 b0 = vlib_get_buffer (vm, buffers[0]);
1376 if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
1378 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1382 desc_table = rxvq->desc;
1383 desc_head = desc_index =
1384 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1385 if (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT)
1388 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1390 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1395 map_guest_mem (vui, rxvq->desc[desc_index].addr))))
1397 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1403 desc_len = vui->virtio_net_hdr_sz;
1406 (!(buffer_addr = map_guest_mem (vui, desc_table[desc_index].addr))))
1408 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1411 buffer_len = desc_table[desc_index].len;
1413 CLIB_PREFETCH (buffer_addr,
1414 clib_min (buffer_len, 2 * CLIB_CACHE_LINE_BYTES), STORE);
1416 virtio_net_hdr_mrg_rxbuf_t *hdr =
1417 (virtio_net_hdr_mrg_rxbuf_t *) buffer_addr;
1419 hdr->hdr.gso_type = 0;
1420 if (vui->virtio_net_hdr_sz == 12)
1421 hdr->num_buffers = 1;
1423 vhost_user_log_dirty_pages (vui, desc_table[desc_index].addr,
1424 vui->virtio_net_hdr_sz);
1426 u16 bytes_left = b0->current_length;
1427 buffer_addr += vui->virtio_net_hdr_sz;
1428 buffer_len -= vui->virtio_net_hdr_sz;
1434 if (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT)
1436 current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
1437 bytes_left = current_b0->current_length;
1446 if (buffer_len == 0)
1448 if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
1450 //Next one is chained
1451 desc_index = desc_table[desc_index].next;
1454 map_guest_mem (vui, desc_table[desc_index].addr))))
1456 rxvq->last_used_idx -= hdr->num_buffers - 1;
1457 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1458 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1461 buffer_len = desc_table[desc_index].len;
1463 else if (vui->virtio_net_hdr_sz == 12) //MRG is available
1465 //Move from available to used buffer
1466 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id =
1468 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len =
1470 vhost_user_log_dirty_ring (vui, rxvq,
1471 ring[rxvq->last_used_idx &
1473 rxvq->last_avail_idx++;
1474 rxvq->last_used_idx++;
1478 (rxvq->last_avail_idx == rxvq->avail->idx))
1480 //Dequeue queued descriptors for this packet
1481 rxvq->last_used_idx -= hdr->num_buffers - 1;
1482 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1483 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1487 desc_table = rxvq->desc;
1488 desc_head = desc_index =
1489 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1491 (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
1493 //It is seriously unlikely that a driver will put indirect descriptor
1494 //after non-indirect descriptor.
1496 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1498 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1504 rxvq->desc[desc_index].addr))))
1506 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1514 map_guest_mem (vui, desc_table[desc_index].addr))))
1516 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1519 buffer_len = desc_table[desc_index].len;
1520 CLIB_PREFETCH (buffer_addr,
1521 clib_min (buffer_len,
1522 2 * CLIB_CACHE_LINE_BYTES), STORE);
1526 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
1531 u16 bytes_to_copy = bytes_left;
1533 (bytes_to_copy > buffer_len) ? buffer_len : bytes_to_copy;
1534 clib_memcpy (buffer_addr,
1535 vlib_buffer_get_current (current_b0) +
1536 current_b0->current_length - bytes_left,
1539 vhost_user_log_dirty_pages (vui,
1540 desc_table[desc_index].addr +
1541 desc_table[desc_index].len -
1542 bytes_left - bytes_to_copy,
1545 bytes_left -= bytes_to_copy;
1546 buffer_len -= bytes_to_copy;
1547 buffer_addr += bytes_to_copy;
1548 desc_len += bytes_to_copy;
1551 if (PREDICT_TRUE (n_left >= 2))
1553 vlib_prefetch_buffer_with_index (vm, buffers[1], STORE);
1554 CLIB_PREFETCH (&n_left, sizeof (n_left), STORE);
1557 //Move from available to used ring
1558 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id = desc_head;
1559 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len = desc_len;
1560 vhost_user_log_dirty_ring (vui, rxvq,
1561 ring[rxvq->last_used_idx & qsz_mask]);
1563 rxvq->last_avail_idx++;
1564 rxvq->last_used_idx++;
1566 n_left--; //At the end for error counting when 'goto done' is invoked
1570 CLIB_MEMORY_BARRIER ();
1571 rxvq->used->idx = rxvq->last_used_idx;
1572 vhost_user_log_dirty_ring (vui, rxvq, idx);
1574 /* interrupt (call) handling */
1575 if ((rxvq->callfd > 0) && !(rxvq->avail->flags & 1))
1577 rxvq->n_since_last_int += n_packets - n_left;
1579 if (rxvq->n_since_last_int > vum->coalesce_frames)
1580 vhost_user_send_call (vm, rxvq);
1585 if (PREDICT_FALSE (vui->lockp != 0))
1588 if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
1590 vlib_error_count (vm, node->node_index, error, n_left);
1591 vlib_increment_simple_counter
1592 (vnet_main.interface_main.sw_if_counters
1593 + VNET_INTERFACE_COUNTER_DROP,
1594 os_get_cpu_number (), vui->sw_if_index, n_left);
1597 vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
1598 return frame->n_vectors;
1601 static clib_error_t *
1602 vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
1605 vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
1606 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1607 vhost_user_main_t *vum = &vhost_user_main;
1608 vhost_user_intf_t *vui =
1609 vec_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
1611 vui->admin_up = is_up;
1614 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
1615 VNET_HW_INTERFACE_FLAG_LINK_UP);
1617 return /* no error */ 0;
1621 VNET_DEVICE_CLASS (vhost_user_dev_class,static) = {
1622 .name = "vhost-user",
1623 .tx_function = vhost_user_intfc_tx,
1624 .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
1625 .tx_function_error_strings = vhost_user_tx_func_error_strings,
1626 .format_device_name = format_vhost_user_interface_name,
1627 .name_renumber = vhost_user_name_renumber,
1628 .admin_up_down_function = vhost_user_interface_admin_up_down,
1629 .no_flatten_output_chains = 1,
1632 VLIB_DEVICE_TX_FUNCTION_MULTIARCH (vhost_user_dev_class,
1633 vhost_user_intfc_tx)
1637 vhost_user_process (vlib_main_t * vm,
1638 vlib_node_runtime_t * rt, vlib_frame_t * f)
1640 vhost_user_main_t *vum = &vhost_user_main;
1641 vhost_user_intf_t *vui;
1642 struct sockaddr_un sun;
1644 unix_file_t template = { 0 };
1645 f64 timeout = 3153600000.0 /* 100 years */ ;
1646 uword *event_data = 0;
1648 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1649 sun.sun_family = AF_UNIX;
1650 template.read_function = vhost_user_socket_read;
1651 template.error_function = vhost_user_socket_error;
1659 vlib_process_wait_for_event_or_clock (vm, timeout);
1660 vlib_process_get_events (vm, &event_data);
1661 vec_reset_length (event_data);
1665 vec_foreach (vui, vum->vhost_user_interfaces)
1668 if (vui->sock_is_server || !vui->active)
1671 if (vui->unix_fd == -1)
1673 /* try to connect */
1675 strncpy (sun.sun_path, (char *) vui->sock_filename,
1676 sizeof (sun.sun_path) - 1);
1679 (sockfd, (struct sockaddr *) &sun,
1680 sizeof (struct sockaddr_un)) == 0)
1682 vui->sock_errno = 0;
1683 vui->unix_fd = sockfd;
1684 template.file_descriptor = sockfd;
1685 vui->unix_file_index = unix_file_add (&unix_main, &template);
1686 hash_set (vum->vhost_user_interface_index_by_sock_fd, sockfd,
1687 vui - vum->vhost_user_interfaces);
1689 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1695 vui->sock_errno = errno;
1700 /* check if socket is alive */
1702 socklen_t len = sizeof (error);
1704 getsockopt (vui->unix_fd, SOL_SOCKET, SO_ERROR, &error, &len);
1707 vhost_user_if_disconnect (vui);
1715 VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
1716 .function = vhost_user_process,
1717 .type = VLIB_NODE_TYPE_PROCESS,
1718 .name = "vhost-user-process",
1723 vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
1725 vhost_user_main_t *vum = &vhost_user_main;
1726 vhost_user_intf_t *vui;
1730 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
1733 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1737 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
1740 // interface is inactive
1742 // disconnect interface sockets
1743 vhost_user_if_disconnect (vui);
1744 // add to inactive interface list
1745 vec_add1 (vum->vhost_user_inactive_interfaces_index, p[0]);
1747 // reset renumbered iface
1748 if (p[0] < vec_len (vum->show_dev_instance_by_real_dev_instance))
1749 vum->show_dev_instance_by_real_dev_instance[p[0]] = ~0;
1751 ethernet_delete_interface (vnm, vui->hw_if_index);
1752 DBG_SOCK ("deleted (deactivated) vhost-user interface instance %d", p[0]);
1757 // init server socket on specified sock_filename
1759 vhost_user_init_server_sock (const char *sock_filename, int *sockfd)
1762 struct sockaddr_un un = { };
1764 /* create listening socket */
1765 fd = socket (AF_UNIX, SOCK_STREAM, 0);
1769 return VNET_API_ERROR_SYSCALL_ERROR_1;
1772 un.sun_family = AF_UNIX;
1773 strncpy ((char *) un.sun_path, (char *) sock_filename,
1774 sizeof (un.sun_path) - 1);
1776 /* remove if exists */
1777 unlink ((char *) sock_filename);
1779 if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
1781 rv = VNET_API_ERROR_SYSCALL_ERROR_2;
1785 if (listen (fd, 1) == -1)
1787 rv = VNET_API_ERROR_SYSCALL_ERROR_3;
1791 unix_file_t template = { 0 };
1792 template.read_function = vhost_user_socksvr_accept_ready;
1793 template.file_descriptor = fd;
1794 unix_file_add (&unix_main, &template);
1803 // get new vhost_user_intf_t from inactive interfaces or create new one
1804 static vhost_user_intf_t *
1805 vhost_user_vui_new ()
1807 vhost_user_main_t *vum = &vhost_user_main;
1808 vhost_user_intf_t *vui = NULL;
1809 int inactive_cnt = vec_len (vum->vhost_user_inactive_interfaces_index);
1810 // if there are any inactive ifaces
1811 if (inactive_cnt > 0)
1815 vum->vhost_user_inactive_interfaces_index[inactive_cnt - 1];
1816 if (vec_len (vum->vhost_user_interfaces) > vui_idx)
1818 vui = vec_elt_at_index (vum->vhost_user_interfaces, vui_idx);
1819 DBG_SOCK ("reusing inactive vhost-user interface index %d",
1822 // "remove" from inactive list
1823 _vec_len (vum->vhost_user_inactive_interfaces_index) -= 1;
1826 // vui was not retrieved from inactive ifaces - create new
1828 vec_add2 (vum->vhost_user_interfaces, vui, 1);
1832 // create ethernet interface for vhost user intf
1834 vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
1835 vhost_user_intf_t * vui, u8 * hwaddress)
1837 vhost_user_main_t *vum = &vhost_user_main;
1839 clib_error_t *error;
1841 /* create hw and sw interface */
1844 clib_memcpy (hwaddr, hwaddress, 6);
1848 f64 now = vlib_time_now (vm);
1850 rnd = (u32) (now * 1e6);
1851 rnd = random_u32 (&rnd);
1853 clib_memcpy (hwaddr + 2, &rnd, sizeof (rnd));
1858 error = ethernet_register_interface
1860 vhost_user_dev_class.index,
1861 vui - vum->vhost_user_interfaces /* device instance */ ,
1862 hwaddr /* ethernet address */ ,
1863 &vui->hw_if_index, 0 /* flag change */ );
1865 clib_error_report (error);
1867 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, vui->hw_if_index);
1868 hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000;
1871 // initialize vui with specified attributes
1873 vhost_user_vui_init (vnet_main_t * vnm,
1874 vhost_user_intf_t * vui, int sockfd,
1875 const char *sock_filename,
1876 u8 is_server, u64 feature_mask, u32 * sw_if_index)
1878 vnet_sw_interface_t *sw;
1879 sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
1880 vlib_thread_main_t *tm = vlib_get_thread_main ();
1883 vui->unix_fd = sockfd;
1884 vui->sw_if_index = sw->sw_if_index;
1885 vui->num_vrings = 2;
1886 vui->sock_is_server = is_server;
1887 strncpy (vui->sock_filename, sock_filename,
1888 ARRAY_LEN (vui->sock_filename) - 1);
1889 vui->sock_errno = 0;
1891 vui->feature_mask = feature_mask;
1893 vui->unix_file_index = ~0;
1894 vui->log_base_addr = 0;
1896 for (q = 0; q < 2; q++)
1898 vui->vrings[q].enabled = 0;
1901 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
1904 *sw_if_index = vui->sw_if_index;
1906 if (tm->n_vlib_mains > 1)
1908 vui->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1909 CLIB_CACHE_LINE_BYTES);
1910 memset ((void *) vui->lockp, 0, CLIB_CACHE_LINE_BYTES);
1914 // register vui and start polling on it
1916 vhost_user_vui_register (vlib_main_t * vm, vhost_user_intf_t * vui)
1918 vhost_user_main_t *vum = &vhost_user_main;
1920 vlib_thread_main_t *tm = vlib_get_thread_main ();
1922 hash_set (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd,
1923 vui - vum->vhost_user_interfaces);
1924 hash_set (vum->vhost_user_interface_index_by_sw_if_index, vui->sw_if_index,
1925 vui - vum->vhost_user_interfaces);
1928 cpu_index = vum->input_cpu_first_index +
1929 (vui - vum->vhost_user_interfaces) % vum->input_cpu_count;
1931 if (tm->n_vlib_mains == 1)
1932 vlib_node_set_state (vm, vhost_user_input_node.index,
1933 VLIB_NODE_STATE_POLLING);
1935 vlib_node_set_state (vlib_mains[cpu_index], vhost_user_input_node.index,
1936 VLIB_NODE_STATE_POLLING);
1938 /* tell process to start polling for sockets */
1939 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1943 vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
1944 const char *sock_filename,
1948 u8 renumber, u32 custom_dev_instance, u8 * hwaddr)
1950 vhost_user_intf_t *vui = NULL;
1957 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
1963 vui = vhost_user_vui_new ();
1964 ASSERT (vui != NULL);
1966 vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
1967 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
1968 feature_mask, &sw_if_idx);
1972 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1975 vhost_user_vui_register (vm, vui);
1978 *sw_if_index = sw_if_idx;
1984 vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
1985 const char *sock_filename,
1988 u64 feature_mask, u8 renumber, u32 custom_dev_instance)
1990 vhost_user_main_t *vum = &vhost_user_main;
1991 vhost_user_intf_t *vui = NULL;
1997 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
2000 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
2004 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
2007 // interface is inactive
2009 // disconnect interface sockets
2010 vhost_user_if_disconnect (vui);
2014 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
2020 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
2021 feature_mask, &sw_if_idx);
2025 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
2028 vhost_user_vui_register (vm, vui);
2034 vhost_user_connect_command_fn (vlib_main_t * vm,
2035 unformat_input_t * input,
2036 vlib_cli_command_t * cmd)
2038 unformat_input_t _line_input, *line_input = &_line_input;
2039 u8 *sock_filename = NULL;
2042 u64 feature_mask = (u64) ~ 0;
2044 u32 custom_dev_instance = ~0;
2048 /* Get a line of input. */
2049 if (!unformat_user (input, unformat_line_input, line_input))
2052 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2054 if (unformat (line_input, "socket %s", &sock_filename))
2056 else if (unformat (line_input, "server"))
2058 else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
2062 (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
2064 else if (unformat (line_input, "renumber %d", &custom_dev_instance))
2069 return clib_error_return (0, "unknown input `%U'",
2070 format_unformat_error, input);
2072 unformat_free (line_input);
2074 vnet_main_t *vnm = vnet_get_main ();
2077 if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
2078 is_server, &sw_if_index, feature_mask,
2079 renumber, custom_dev_instance, hw)))
2081 vec_free (sock_filename);
2082 return clib_error_return (0, "vhost_user_create_if returned %d", rv);
2085 vec_free (sock_filename);
2086 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
2092 vhost_user_delete_command_fn (vlib_main_t * vm,
2093 unformat_input_t * input,
2094 vlib_cli_command_t * cmd)
2096 unformat_input_t _line_input, *line_input = &_line_input;
2097 u32 sw_if_index = ~0;
2099 /* Get a line of input. */
2100 if (!unformat_user (input, unformat_line_input, line_input))
2103 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2105 if (unformat (line_input, "sw_if_index %d", &sw_if_index))
2108 return clib_error_return (0, "unknown input `%U'",
2109 format_unformat_error, input);
2111 unformat_free (line_input);
2113 vnet_main_t *vnm = vnet_get_main ();
2115 vhost_user_delete_if (vnm, vm, sw_if_index);
2121 vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
2122 vhost_user_intf_details_t ** out_vuids)
2125 vhost_user_main_t *vum = &vhost_user_main;
2126 vhost_user_intf_t *vui;
2127 vhost_user_intf_details_t *r_vuids = NULL;
2128 vhost_user_intf_details_t *vuid = NULL;
2129 u32 *hw_if_indices = 0;
2130 vnet_hw_interface_t *hi;
2137 vec_foreach (vui, vum->vhost_user_interfaces)
2140 vec_add1 (hw_if_indices, vui->hw_if_index);
2143 for (i = 0; i < vec_len (hw_if_indices); i++)
2145 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2146 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2148 vec_add2 (r_vuids, vuid, 1);
2149 vuid->sw_if_index = vui->sw_if_index;
2150 vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
2151 vuid->features = vui->features;
2152 vuid->is_server = vui->sock_is_server;
2153 vuid->num_regions = vui->nregions;
2154 vuid->sock_errno = vui->sock_errno;
2155 strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
2156 ARRAY_LEN (vuid->sock_filename) - 1);
2158 s = format (s, "%v%c", hi->name, 0);
2160 strncpy ((char *) vuid->if_name, (char *) s,
2161 ARRAY_LEN (vuid->if_name) - 1);
2166 vec_free (hw_if_indices);
2168 *out_vuids = r_vuids;
2174 show_vhost_user_command_fn (vlib_main_t * vm,
2175 unformat_input_t * input,
2176 vlib_cli_command_t * cmd)
2178 clib_error_t *error = 0;
2179 vnet_main_t *vnm = vnet_get_main ();
2180 vhost_user_main_t *vum = &vhost_user_main;
2181 vhost_user_intf_t *vui;
2182 u32 hw_if_index, *hw_if_indices = 0;
2183 vnet_hw_interface_t *hi;
2191 struct feat_struct *feat_entry;
2193 static struct feat_struct feat_array[] = {
2194 #define _(s,b) { .str = #s, .bit = b, },
2195 foreach_virtio_net_feature
2200 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2203 (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
2205 vec_add1 (hw_if_indices, hw_if_index);
2206 vlib_cli_output (vm, "add %d", hw_if_index);
2208 else if (unformat (input, "descriptors") || unformat (input, "desc"))
2212 error = clib_error_return (0, "unknown input `%U'",
2213 format_unformat_error, input);
2217 if (vec_len (hw_if_indices) == 0)
2219 vec_foreach (vui, vum->vhost_user_interfaces)
2222 vec_add1 (hw_if_indices, vui->hw_if_index);
2225 vlib_cli_output (vm, "Virtio vhost-user interfaces");
2226 vlib_cli_output (vm, "Global:\n coalesce frames %d time %e\n\n",
2227 vum->coalesce_frames, vum->coalesce_time);
2229 for (i = 0; i < vec_len (hw_if_indices); i++)
2231 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2232 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2233 vlib_cli_output (vm, "Interface: %s (ifindex %d)",
2234 hi->name, hw_if_indices[i]);
2236 vlib_cli_output (vm, "virtio_net_hdr_sz %d\n features (0x%llx): \n",
2237 vui->virtio_net_hdr_sz, vui->features);
2239 feat_entry = (struct feat_struct *) &feat_array;
2240 while (feat_entry->str)
2242 if (vui->features & (1 << feat_entry->bit))
2243 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
2248 vlib_cli_output (vm, "\n");
2251 vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
2253 vui->sock_is_server ? "server" : "client",
2254 strerror (vui->sock_errno));
2256 vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
2260 vlib_cli_output (vm,
2261 " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
2262 vlib_cli_output (vm,
2263 " ====== ===== ================== ================== ================== ================== ==================\n");
2265 for (j = 0; j < vui->nregions; j++)
2267 vlib_cli_output (vm,
2268 " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
2269 j, vui->region_mmap_fd[j],
2270 vui->regions[j].guest_phys_addr,
2271 vui->regions[j].memory_size,
2272 vui->regions[j].userspace_addr,
2273 vui->regions[j].mmap_offset,
2274 pointer_to_uword (vui->region_mmap_addr[j]));
2276 for (q = 0; q < vui->num_vrings; q++)
2278 vlib_cli_output (vm, "\n Virtqueue %d\n", q);
2280 vlib_cli_output (vm,
2281 " qsz %d last_avail_idx %d last_used_idx %d\n",
2282 vui->vrings[q].qsz, vui->vrings[q].last_avail_idx,
2283 vui->vrings[q].last_used_idx);
2285 if (vui->vrings[q].avail && vui->vrings[q].used)
2286 vlib_cli_output (vm,
2287 " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
2288 vui->vrings[q].avail->flags,
2289 vui->vrings[q].avail->idx,
2290 vui->vrings[q].used->flags,
2291 vui->vrings[q].used->idx);
2293 vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
2294 vui->vrings[q].kickfd,
2295 vui->vrings[q].callfd, vui->vrings[q].errfd);
2299 vlib_cli_output (vm, "\n descriptor table:\n");
2300 vlib_cli_output (vm,
2301 " id addr len flags next user_addr\n");
2302 vlib_cli_output (vm,
2303 " ===== ================== ===== ====== ===== ==================\n");
2304 for (j = 0; j < vui->vrings[q].qsz; j++)
2306 vlib_cli_output (vm,
2307 " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
2308 j, vui->vrings[q].desc[j].addr,
2309 vui->vrings[q].desc[j].len,
2310 vui->vrings[q].desc[j].flags,
2311 vui->vrings[q].desc[j].next,
2312 pointer_to_uword (map_guest_mem
2314 vui->vrings[q].desc[j].
2319 vlib_cli_output (vm, "\n");
2322 vec_free (hw_if_indices);
2332 VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
2333 .path = "create vhost-user",
2334 .short_help = "create vhost-user socket <socket-filename> [server] [feature-mask <hex>] [renumber <dev_instance>]",
2335 .function = vhost_user_connect_command_fn,
2338 VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
2339 .path = "delete vhost-user",
2340 .short_help = "delete vhost-user sw_if_index <nn>",
2341 .function = vhost_user_delete_command_fn,
2344 VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
2345 .path = "show vhost-user",
2346 .short_help = "show vhost-user interface",
2347 .function = show_vhost_user_command_fn,
2352 static clib_error_t *
2353 vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
2355 vhost_user_main_t *vum = &vhost_user_main;
2357 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2359 if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
2361 else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
2363 else if (unformat (input, "dont-dump-memory"))
2364 vum->dont_dump_vhost_user_memory = 1;
2366 return clib_error_return (0, "unknown input `%U'",
2367 format_unformat_error, input);
2373 /* vhost-user { ... } configuration. */
2374 VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
2377 vhost_user_unmap_all (void)
2379 vhost_user_main_t *vum = &vhost_user_main;
2380 vhost_user_intf_t *vui;
2382 if (vum->dont_dump_vhost_user_memory)
2384 vec_foreach (vui, vum->vhost_user_interfaces)
2386 unmap_all_mem_regions (vui);
2392 * fd.io coding-style-patch-verification: ON
2395 * eval: (c-set-style "gnu")