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)
157 __m128i rl, rh, al, ah, r;
158 al = _mm_set1_epi64x (addr + 1);
159 ah = _mm_set1_epi64x (addr);
161 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[0]);
162 rl = _mm_cmpgt_epi64 (al, rl);
163 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[0]);
164 rh = _mm_cmpgt_epi64 (rh, ah);
165 r = _mm_and_si128 (rl, rh);
167 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[2]);
168 rl = _mm_cmpgt_epi64 (al, rl);
169 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[2]);
170 rh = _mm_cmpgt_epi64 (rh, ah);
171 r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x22);
173 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[4]);
174 rl = _mm_cmpgt_epi64 (al, rl);
175 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[4]);
176 rh = _mm_cmpgt_epi64 (rh, ah);
177 r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x44);
179 rl = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_lo[6]);
180 rl = _mm_cmpgt_epi64 (al, rl);
181 rh = _mm_loadu_si128 ((__m128i *) & vui->region_guest_addr_hi[6]);
182 rh = _mm_cmpgt_epi64 (rh, ah);
183 r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
185 r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
186 i = __builtin_ctzll (_mm_movemask_epi8 (r));
188 if (i < vui->nregions)
190 return (void *) (vui->region_mmap_addr[i] + addr -
191 vui->regions[i].guest_phys_addr);
195 for (i = 0; i < vui->nregions; i++)
197 if ((vui->regions[i].guest_phys_addr <= addr) &&
198 ((vui->regions[i].guest_phys_addr + vui->regions[i].memory_size) >
201 return (void *) (vui->region_mmap_addr[i] + addr -
202 vui->regions[i].guest_phys_addr);
206 DBG_VQ ("failed to map guest mem addr %llx", addr);
211 map_user_mem (vhost_user_intf_t * vui, uword addr)
214 for (i = 0; i < vui->nregions; i++)
216 if ((vui->regions[i].userspace_addr <= addr) &&
217 ((vui->regions[i].userspace_addr + vui->regions[i].memory_size) >
220 return (void *) (vui->region_mmap_addr[i] + addr -
221 vui->regions[i].userspace_addr);
228 get_huge_page_size (int fd)
236 unmap_all_mem_regions (vhost_user_intf_t * vui)
239 for (i = 0; i < vui->nregions; i++)
241 if (vui->region_mmap_addr[i] != (void *) -1)
244 long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
246 ssize_t map_sz = (vui->regions[i].memory_size +
247 vui->regions[i].mmap_offset +
248 page_sz) & ~(page_sz - 1);
251 munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
255 ("unmap memory region %d addr 0x%lx len 0x%lx page_sz 0x%x", i,
256 vui->region_mmap_addr[i], map_sz, page_sz);
258 vui->region_mmap_addr[i] = (void *) -1;
262 clib_warning ("failed to unmap memory region (errno %d)",
265 close (vui->region_mmap_fd[i]);
272 static clib_error_t *
273 vhost_user_callfd_read_ready (unix_file_t * uf)
275 __attribute__ ((unused)) int n;
277 n = read (uf->file_descriptor, ((char *) &buff), 8);
282 vhost_user_if_disconnect (vhost_user_intf_t * vui)
284 vhost_user_main_t *vum = &vhost_user_main;
285 vnet_main_t *vnm = vnet_get_main ();
288 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
290 if (vui->unix_file_index != ~0)
292 unix_file_del (&unix_main, unix_main.file_pool + vui->unix_file_index);
293 vui->unix_file_index = ~0;
296 close (vui->unix_fd);
298 hash_unset (vum->vhost_user_interface_index_by_sock_fd, vui->unix_fd);
299 hash_unset (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd);
302 for (q = 0; q < vui->num_vrings; q++)
304 if (vui->vrings[q].callfd > -1)
306 unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
307 vui->vrings[q].callfd_idx);
308 unix_file_del (&unix_main, uf);
311 if (vui->vrings[q].kickfd > -1)
312 close (vui->vrings[q].kickfd);
314 vui->vrings[q].callfd = -1;
315 vui->vrings[q].kickfd = -1;
316 vui->vrings[q].desc = NULL;
317 vui->vrings[q].avail = NULL;
318 vui->vrings[q].used = NULL;
319 vui->vrings[q].log_guest_addr = 0;
320 vui->vrings[q].log_used = 0;
323 unmap_all_mem_regions (vui);
324 DBG_SOCK ("interface ifindex %d disconnected", vui->sw_if_index);
327 #define VHOST_LOG_PAGE 0x1000
329 vhost_user_log_dirty_pages (vhost_user_intf_t * vui, u64 addr, u64 len)
331 if (PREDICT_TRUE (vui->log_base_addr == 0
332 || !(vui->features & (1 << FEAT_VHOST_F_LOG_ALL))))
336 if (PREDICT_FALSE ((addr + len - 1) / VHOST_LOG_PAGE / 8 >= vui->log_size))
338 DBG_SOCK ("vhost_user_log_dirty_pages(): out of range\n");
342 CLIB_MEMORY_BARRIER ();
343 u64 page = addr / VHOST_LOG_PAGE;
344 while (page * VHOST_LOG_PAGE < addr + len)
346 ((u8 *) vui->log_base_addr)[page / 8] |= 1 << page % 8;
351 #define vhost_user_log_dirty_ring(vui, vq, member) \
352 if (PREDICT_FALSE(vq->log_used)) { \
353 vhost_user_log_dirty_pages(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
354 sizeof(vq->used->member)); \
357 static clib_error_t *
358 vhost_user_socket_read (unix_file_t * uf)
361 int fd, number_of_fds = 0;
362 int fds[VHOST_MEMORY_MAX_NREGIONS];
363 vhost_user_msg_t msg;
366 vhost_user_main_t *vum = &vhost_user_main;
367 vhost_user_intf_t *vui;
368 struct cmsghdr *cmsg;
371 unix_file_t template = { 0 };
372 vnet_main_t *vnm = vnet_get_main ();
374 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
375 uf->file_descriptor);
378 DBG_SOCK ("FD %d doesn't belong to any interface", uf->file_descriptor);
382 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
384 char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
386 memset (&mh, 0, sizeof (mh));
387 memset (control, 0, sizeof (control));
389 for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
392 /* set the payload */
393 iov[0].iov_base = (void *) &msg;
394 iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
398 mh.msg_control = control;
399 mh.msg_controllen = sizeof (control);
401 n = recvmsg (uf->file_descriptor, &mh, 0);
403 if (n != VHOST_USER_MSG_HDR_SZ)
406 if (mh.msg_flags & MSG_CTRUNC)
411 cmsg = CMSG_FIRSTHDR (&mh);
413 if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
414 (cmsg->cmsg_type == SCM_RIGHTS) &&
415 (cmsg->cmsg_len - CMSG_LEN (0) <=
416 VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
418 number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
419 clib_memcpy (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
422 /* version 1, no reply bit set */
423 if ((msg.flags & 7) != 1)
425 DBG_SOCK ("malformed message received. closing socket");
430 int rv __attribute__ ((unused));
431 /* $$$$ pay attention to rv */
432 rv = read (uf->file_descriptor, ((char *) &msg) + n, msg.size);
437 case VHOST_USER_GET_FEATURES:
438 DBG_SOCK ("if %d msg VHOST_USER_GET_FEATURES", vui->hw_if_index);
441 msg.u64 = (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
442 (1 << FEAT_VIRTIO_F_ANY_LAYOUT) |
443 (1 << FEAT_VIRTIO_F_INDIRECT_DESC) |
444 (1 << FEAT_VHOST_F_LOG_ALL) |
445 (1 << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
446 (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES) |
447 (1UL << FEAT_VIRTIO_F_VERSION_1);
448 msg.u64 &= vui->feature_mask;
450 msg.size = sizeof (msg.u64);
453 case VHOST_USER_SET_FEATURES:
454 DBG_SOCK ("if %d msg VHOST_USER_SET_FEATURES features 0x%016llx",
455 vui->hw_if_index, msg.u64);
457 vui->features = msg.u64;
459 if (vui->features & (1 << FEAT_VIRTIO_NET_F_MRG_RXBUF))
460 vui->virtio_net_hdr_sz = 12;
462 vui->virtio_net_hdr_sz = 10;
465 (vui->features & (1 << FEAT_VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
467 ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
468 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
471 for (q = 0; q < 2; q++)
473 vui->vrings[q].desc = 0;
474 vui->vrings[q].avail = 0;
475 vui->vrings[q].used = 0;
476 vui->vrings[q].log_guest_addr = 0;
477 vui->vrings[q].log_used = 0;
480 DBG_SOCK ("interface %d disconnected", vui->sw_if_index);
484 case VHOST_USER_SET_MEM_TABLE:
485 DBG_SOCK ("if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
486 vui->hw_if_index, msg.memory.nregions);
488 if ((msg.memory.nregions < 1) ||
489 (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
492 DBG_SOCK ("number of mem regions must be between 1 and %i",
493 VHOST_MEMORY_MAX_NREGIONS);
498 if (msg.memory.nregions != number_of_fds)
500 DBG_SOCK ("each memory region must have FD");
503 unmap_all_mem_regions (vui);
504 for (i = 0; i < msg.memory.nregions; i++)
506 clib_memcpy (&(vui->regions[i]), &msg.memory.regions[i],
507 sizeof (vhost_user_memory_region_t));
509 long page_sz = get_huge_page_size (fds[i]);
511 /* align size to 2M page */
512 ssize_t map_sz = (vui->regions[i].memory_size +
513 vui->regions[i].mmap_offset +
514 page_sz) & ~(page_sz - 1);
516 vui->region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
517 MAP_SHARED, fds[i], 0);
518 vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr;
519 vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr +
520 vui->regions[i].memory_size;
523 ("map memory region %d addr 0 len 0x%lx fd %d mapped 0x%lx "
524 "page_sz 0x%x", i, map_sz, fds[i], vui->region_mmap_addr[i],
527 if (vui->region_mmap_addr[i] == MAP_FAILED)
529 clib_warning ("failed to map memory. errno is %d", errno);
532 vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
533 vui->region_mmap_fd[i] = fds[i];
535 vui->nregions = msg.memory.nregions;
538 case VHOST_USER_SET_VRING_NUM:
539 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
540 vui->hw_if_index, msg.state.index, msg.state.num);
542 if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
543 (msg.state.num == 0) || /* it cannot be zero */
544 (msg.state.num % 2)) /* must be power of 2 */
546 vui->vrings[msg.state.index].qsz = msg.state.num;
549 case VHOST_USER_SET_VRING_ADDR:
550 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
551 vui->hw_if_index, msg.state.index);
553 vui->vrings[msg.state.index].desc = (vring_desc_t *)
554 map_user_mem (vui, msg.addr.desc_user_addr);
555 vui->vrings[msg.state.index].used = (vring_used_t *)
556 map_user_mem (vui, msg.addr.used_user_addr);
557 vui->vrings[msg.state.index].avail = (vring_avail_t *)
558 map_user_mem (vui, msg.addr.avail_user_addr);
560 if ((vui->vrings[msg.state.index].desc == NULL) ||
561 (vui->vrings[msg.state.index].used == NULL) ||
562 (vui->vrings[msg.state.index].avail == NULL))
564 DBG_SOCK ("failed to map user memory for hw_if_index %d",
569 vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
570 vui->vrings[msg.state.index].log_used =
571 (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
573 /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
574 the ring is initialized in an enabled state. */
576 if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
578 vui->vrings[msg.state.index].enabled = 1;
581 vui->vrings[msg.state.index].last_used_idx =
582 vui->vrings[msg.state.index].used->idx;
584 /* tell driver that we don't want interrupts */
585 vui->vrings[msg.state.index].used->flags |= 1;
588 case VHOST_USER_SET_OWNER:
589 DBG_SOCK ("if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
592 case VHOST_USER_RESET_OWNER:
593 DBG_SOCK ("if %d msg VHOST_USER_RESET_OWNER", vui->hw_if_index);
596 case VHOST_USER_SET_VRING_CALL:
597 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_CALL u64 %d",
598 vui->hw_if_index, msg.u64);
600 q = (u8) (msg.u64 & 0xFF);
602 if (!(msg.u64 & 0x100))
604 if (number_of_fds != 1)
607 /* if there is old fd, delete it */
608 if (vui->vrings[q].callfd > -1)
610 unix_file_t *uf = pool_elt_at_index (unix_main.file_pool,
611 vui->vrings[q].callfd_idx);
612 unix_file_del (&unix_main, uf);
614 vui->vrings[q].callfd = fds[0];
615 template.read_function = vhost_user_callfd_read_ready;
616 template.file_descriptor = fds[0];
617 vui->vrings[q].callfd_idx = unix_file_add (&unix_main, &template);
620 vui->vrings[q].callfd = -1;
623 case VHOST_USER_SET_VRING_KICK:
624 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_KICK u64 %d",
625 vui->hw_if_index, msg.u64);
627 q = (u8) (msg.u64 & 0xFF);
629 if (!(msg.u64 & 0x100))
631 if (number_of_fds != 1)
634 if (vui->vrings[q].kickfd > -1)
635 close (vui->vrings[q].kickfd);
637 vui->vrings[q].kickfd = fds[0];
640 vui->vrings[q].kickfd = -1;
643 case VHOST_USER_SET_VRING_ERR:
644 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_ERR u64 %d",
645 vui->hw_if_index, msg.u64);
647 q = (u8) (msg.u64 & 0xFF);
649 if (!(msg.u64 & 0x100))
651 if (number_of_fds != 1)
659 vui->vrings[q].errfd = fd;
662 case VHOST_USER_SET_VRING_BASE:
663 DBG_SOCK ("if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
664 vui->hw_if_index, msg.state.index, msg.state.num);
666 vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
669 case VHOST_USER_GET_VRING_BASE:
670 DBG_SOCK ("if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
671 vui->hw_if_index, msg.state.index, msg.state.num);
673 /* Spec says: Client must [...] stop ring upon receiving VHOST_USER_GET_VRING_BASE. */
674 vui->vrings[msg.state.index].enabled = 0;
676 msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
678 msg.size = sizeof (msg.state);
681 case VHOST_USER_NONE:
682 DBG_SOCK ("if %d msg VHOST_USER_NONE", vui->hw_if_index);
686 case VHOST_USER_SET_LOG_BASE:
688 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_BASE", vui->hw_if_index);
690 if (msg.size != sizeof (msg.log))
693 ("invalid msg size for VHOST_USER_SET_LOG_BASE: %d instead of %d",
694 msg.size, sizeof (msg.log));
699 (vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
702 ("VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but VHOST_USER_SET_LOG_BASE received");
707 /* align size to 2M page */
708 long page_sz = get_huge_page_size (fd);
710 (msg.log.size + msg.log.offset + page_sz) & ~(page_sz - 1);
712 vui->log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
716 ("map log region addr 0 len 0x%lx off 0x%lx fd %d mapped 0x%lx",
717 map_sz, msg.log.offset, fd, vui->log_base_addr);
719 if (vui->log_base_addr == MAP_FAILED)
721 clib_warning ("failed to map memory. errno is %d", errno);
725 vui->log_base_addr += msg.log.offset;
726 vui->log_size = msg.log.size;
729 msg.size = sizeof (msg.u64);
734 case VHOST_USER_SET_LOG_FD:
735 DBG_SOCK ("if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
739 case VHOST_USER_GET_PROTOCOL_FEATURES:
740 DBG_SOCK ("if %d msg VHOST_USER_GET_PROTOCOL_FEATURES",
744 msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD);
745 msg.size = sizeof (msg.u64);
748 case VHOST_USER_SET_PROTOCOL_FEATURES:
749 DBG_SOCK ("if %d msg VHOST_USER_SET_PROTOCOL_FEATURES features 0x%lx",
750 vui->hw_if_index, msg.u64);
752 vui->protocol_features = msg.u64;
756 case VHOST_USER_SET_VRING_ENABLE:
757 DBG_SOCK ("if %d VHOST_USER_SET_VRING_ENABLE, enable: %d",
758 vui->hw_if_index, msg.state.num);
759 vui->vrings[msg.state.index].enabled = msg.state.num;
763 DBG_SOCK ("unknown vhost-user message %d received. closing socket",
768 /* if we have pointers to descriptor table, go up */
770 vui->vrings[VHOST_NET_VRING_IDX_TX].desc &&
771 vui->vrings[VHOST_NET_VRING_IDX_RX].desc)
774 DBG_SOCK ("interface %d connected", vui->sw_if_index);
776 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
777 VNET_HW_INTERFACE_FLAG_LINK_UP);
782 /* if we need to reply */
786 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
787 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
794 vhost_user_if_disconnect (vui);
798 static clib_error_t *
799 vhost_user_socket_error (unix_file_t * uf)
801 vhost_user_main_t *vum = &vhost_user_main;
802 vhost_user_intf_t *vui;
805 p = hash_get (vum->vhost_user_interface_index_by_sock_fd,
806 uf->file_descriptor);
809 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
813 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
815 vhost_user_if_disconnect (vui);
819 static clib_error_t *
820 vhost_user_socksvr_accept_ready (unix_file_t * uf)
822 int client_fd, client_len;
823 struct sockaddr_un client;
824 unix_file_t template = { 0 };
825 vhost_user_main_t *vum = &vhost_user_main;
826 vhost_user_intf_t *vui;
829 p = hash_get (vum->vhost_user_interface_index_by_listener_fd,
830 uf->file_descriptor);
833 DBG_SOCK ("fd %d doesn't belong to any interface", uf->file_descriptor);
837 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
839 client_len = sizeof (client);
840 client_fd = accept (uf->file_descriptor,
841 (struct sockaddr *) &client,
842 (socklen_t *) & client_len);
845 return clib_error_return_unix (0, "accept");
847 template.read_function = vhost_user_socket_read;
848 template.error_function = vhost_user_socket_error;
849 template.file_descriptor = client_fd;
850 vui->unix_file_index = unix_file_add (&unix_main, &template);
852 vui->client_fd = client_fd;
853 hash_set (vum->vhost_user_interface_index_by_sock_fd, vui->client_fd,
854 vui - vum->vhost_user_interfaces);
859 static clib_error_t *
860 vhost_user_init (vlib_main_t * vm)
863 vhost_user_main_t *vum = &vhost_user_main;
864 vlib_thread_main_t *tm = vlib_get_thread_main ();
865 vlib_thread_registration_t *tr;
868 error = vlib_call_init_function (vm, ip4_init);
872 vum->vhost_user_interface_index_by_listener_fd =
873 hash_create (0, sizeof (uword));
874 vum->vhost_user_interface_index_by_sock_fd =
875 hash_create (0, sizeof (uword));
876 vum->vhost_user_interface_index_by_sw_if_index =
877 hash_create (0, sizeof (uword));
878 vum->coalesce_frames = 32;
879 vum->coalesce_time = 1e-3;
881 vec_validate_aligned (vum->rx_buffers, tm->n_vlib_mains - 1,
882 CLIB_CACHE_LINE_BYTES);
884 /* find out which cpus will be used for input */
885 vum->input_cpu_first_index = 0;
886 vum->input_cpu_count = 1;
887 p = hash_get_mem (tm->thread_registrations_by_name, "workers");
888 tr = p ? (vlib_thread_registration_t *) p[0] : 0;
890 if (tr && tr->count > 0)
892 vum->input_cpu_first_index = tr->first_index;
893 vum->input_cpu_count = tr->count;
899 VLIB_INIT_FUNCTION (vhost_user_init);
901 static clib_error_t *
902 vhost_user_exit (vlib_main_t * vm)
908 VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
912 VHOST_USER_RX_NEXT_ETHERNET_INPUT,
913 VHOST_USER_RX_NEXT_DROP,
914 VHOST_USER_RX_N_NEXT,
922 #if VHOST_USER_COPY_TX_HDR == 1
923 virtio_net_hdr_t hdr;
925 } vhost_user_input_trace_t;
928 format_vhost_user_input_trace (u8 * s, va_list * va)
930 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
931 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
932 CLIB_UNUSED (vnet_main_t * vnm) = vnet_get_main ();
933 vhost_user_main_t *vum = &vhost_user_main;
934 vhost_user_input_trace_t *t = va_arg (*va, vhost_user_input_trace_t *);
935 vhost_user_intf_t *vui = vec_elt_at_index (vum->vhost_user_interfaces,
938 vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, vui->sw_if_index);
940 #if VHOST_USER_COPY_TX_HDR == 1
941 uword indent = format_get_indent (s);
944 s = format (s, "%U virtqueue %d",
945 format_vnet_sw_interface_name, vnm, sw, t->virtqueue);
947 #if VHOST_USER_COPY_TX_HDR == 1
948 s = format (s, "\n%Uvirtio_net_hdr flags 0x%02x gso_type %u hdr_len %u",
949 format_white_space, indent,
950 t->hdr.flags, t->hdr.gso_type, t->hdr.hdr_len);
957 vhost_user_rx_trace (vlib_main_t * vm,
958 vlib_node_runtime_t * node,
959 vhost_user_intf_t * vui, i16 virtqueue)
962 vhost_user_main_t *vum = &vhost_user_main;
964 u32 next_index = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
966 n_left = vec_len (vui->d_trace_buffers);
967 b = vui->d_trace_buffers;
973 vhost_user_input_trace_t *t0;
978 b0 = vlib_get_buffer (vm, bi0);
979 vlib_trace_buffer (vm, node, next_index, b0, /* follow_chain */ 0);
980 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
981 t0->virtqueue = virtqueue;
982 t0->device_index = vui - vum->vhost_user_interfaces;
983 #if VHOST_USER_COPY_TX_HDR == 1
984 clib_memcpy (&t0->hdr, b0->pre_data, sizeof (virtio_net_hdr_t));
992 vhost_user_send_call (vlib_main_t * vm, vhost_user_vring_t * vq)
994 vhost_user_main_t *vum = &vhost_user_main;
996 int rv __attribute__ ((unused));
997 /* $$$$ pay attention to rv */
998 rv = write (vq->callfd, &x, sizeof (x));
999 vq->n_since_last_int = 0;
1000 vq->int_deadline = vlib_time_now (vm) + vum->coalesce_time;
1005 vhost_user_if_input (vlib_main_t * vm,
1006 vhost_user_main_t * vum,
1007 vhost_user_intf_t * vui, vlib_node_runtime_t * node)
1009 vhost_user_vring_t *txvq = &vui->vrings[VHOST_NET_VRING_IDX_TX];
1010 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
1011 uword n_rx_packets = 0, n_rx_bytes = 0;
1013 u32 n_left_to_next, *to_next;
1016 uword n_trace = vlib_get_trace_count (vm, node);
1018 u32 cpu_index, rx_len, drops, flush;
1019 f64 now = vlib_time_now (vm);
1021 vec_reset_length (vui->d_trace_buffers);
1023 /* no descriptor ptr - bail out */
1024 if (PREDICT_FALSE (!txvq->desc || !txvq->avail || !txvq->enabled))
1027 /* do we have pending intterupts ? */
1028 if ((txvq->n_since_last_int) && (txvq->int_deadline < now))
1029 vhost_user_send_call (vm, txvq);
1031 if ((rxvq->n_since_last_int) && (rxvq->int_deadline < now))
1032 vhost_user_send_call (vm, rxvq);
1034 /* only bit 0 of avail.flags is used so we don't want to deal with this
1035 interface if any other bit is set */
1036 if (PREDICT_FALSE (txvq->avail->flags & 0xFFFE))
1039 n_left = (u16) (txvq->avail->idx - txvq->last_avail_idx);
1042 if (PREDICT_FALSE (n_left == 0))
1045 if (PREDICT_FALSE (n_left == txvq->qsz))
1047 //Informational error logging when VPP is not receiving packets fast enough
1048 vlib_error_count (vm, node->node_index,
1049 VHOST_USER_INPUT_FUNC_ERROR_FULL_RX_QUEUE, 1);
1052 if (PREDICT_FALSE (!vui->admin_up))
1054 /* if intf is admin down, just drop all packets waiting in the ring */
1055 txvq->last_avail_idx = txvq->last_used_idx = txvq->avail->idx;
1056 CLIB_MEMORY_BARRIER ();
1057 txvq->used->idx = txvq->last_used_idx;
1058 vhost_user_log_dirty_ring (vui, txvq, idx);
1059 vhost_user_send_call (vm, txvq);
1063 qsz_mask = txvq->qsz - 1;
1064 cpu_index = os_get_cpu_number ();
1068 if (n_left > VLIB_FRAME_SIZE)
1069 n_left = VLIB_FRAME_SIZE;
1071 /* Allocate some buffers.
1072 * Note that buffers that are chained for jumbo
1073 * frames are allocated separately using a slower path.
1074 * The idea is to be certain to have enough buffers at least
1075 * to cycle through the descriptors without having to check for errors.
1076 * For jumbo frames, the bottleneck is memory copy anyway.
1078 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1080 vec_alloc (vum->rx_buffers[cpu_index], 2 * VLIB_FRAME_SIZE);
1082 if (PREDICT_FALSE (!vum->rx_buffers[cpu_index]))
1083 flush = n_left; //Drop all input
1086 if (PREDICT_FALSE (_vec_len (vum->rx_buffers[cpu_index]) < n_left))
1088 u32 curr_len = _vec_len (vum->rx_buffers[cpu_index]);
1089 _vec_len (vum->rx_buffers[cpu_index]) +=
1090 vlib_buffer_alloc_from_free_list (vm,
1091 vum->rx_buffers[cpu_index] +
1093 2 * VLIB_FRAME_SIZE - curr_len,
1094 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
1096 if (PREDICT_FALSE (n_left > _vec_len (vum->rx_buffers[cpu_index])))
1097 flush = n_left - _vec_len (vum->rx_buffers[cpu_index]);
1100 if (PREDICT_FALSE (flush))
1102 //Remove some input buffers
1105 vlib_error_count (vm, vhost_user_input_node.index,
1106 VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER, flush);
1109 u16 desc_chain_head =
1110 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1111 txvq->last_avail_idx++;
1112 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1114 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1115 vhost_user_log_dirty_ring (vui, txvq,
1116 ring[txvq->last_used_idx & qsz_mask]);
1117 txvq->last_used_idx++;
1122 rx_len = vec_len (vum->rx_buffers[cpu_index]); //vector might be null
1125 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1127 while (n_left > 0 && n_left_to_next > 0)
1129 vlib_buffer_t *b_head, *b_current;
1130 u32 bi_head, bi_current;
1131 u16 desc_chain_head, desc_current;
1132 u8 error = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
1134 if (PREDICT_TRUE (n_left > 1))
1137 txvq->avail->ring[(txvq->last_avail_idx + 1) & qsz_mask];
1139 map_guest_mem (vui, txvq->desc[next_desc].addr);
1140 if (PREDICT_TRUE (buffer_addr != 0))
1141 CLIB_PREFETCH (buffer_addr, 64, STORE);
1143 u32 bi = vum->rx_buffers[cpu_index][rx_len - 2];
1144 vlib_prefetch_buffer_with_index (vm, bi, STORE);
1145 CLIB_PREFETCH (vlib_get_buffer (vm, bi)->data, 128, STORE);
1148 desc_chain_head = desc_current =
1149 txvq->avail->ring[txvq->last_avail_idx & qsz_mask];
1150 bi_head = bi_current = vum->rx_buffers[cpu_index][--rx_len];
1151 b_head = b_current = vlib_get_buffer (vm, bi_head);
1152 vlib_buffer_chain_init (b_head);
1155 if (PREDICT_TRUE (vui->is_any_layout) ||
1156 (!(txvq->desc[desc_current].flags & VIRTQ_DESC_F_NEXT) &&
1157 !(txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)))
1159 /* ANYLAYOUT or single buffer */
1160 offset = vui->virtio_net_hdr_sz;
1164 /* CSR case without ANYLAYOUT, skip 1st buffer */
1165 offset = txvq->desc[desc_current].len;
1168 vring_desc_t *desc_table = txvq->desc;
1169 u32 desc_index = desc_current;
1171 if (txvq->desc[desc_current].flags & VIRTQ_DESC_F_INDIRECT)
1173 desc_table = map_guest_mem (vui, txvq->desc[desc_current].addr);
1175 if (PREDICT_FALSE (desc_table == 0))
1177 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1185 map_guest_mem (vui, desc_table[desc_index].addr);
1186 if (PREDICT_FALSE (buffer_addr == 0))
1188 error = VHOST_USER_INPUT_FUNC_ERROR_MMAP_FAIL;
1193 (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1195 CLIB_PREFETCH (&desc_table[desc_table[desc_index].next],
1196 sizeof (vring_desc_t), STORE);
1199 #if VHOST_USER_COPY_TX_HDR == 1
1200 if (PREDICT_TRUE (offset))
1201 clib_memcpy (b->pre_data, buffer_addr, sizeof (virtio_net_hdr_t)); /* 12 byte hdr is not used on tx */
1204 if (desc_table[desc_index].len > offset)
1206 u16 len = desc_table[desc_index].len - offset;
1207 u16 copied = vlib_buffer_chain_append_data_with_alloc (vm,
1208 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX,
1217 error = VHOST_USER_INPUT_FUNC_ERROR_NO_BUFFER;
1223 /* if next flag is set, take next desc in the chain */
1224 if ((desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT))
1225 desc_index = desc_table[desc_index].next;
1231 /* consume the descriptor and return it as used */
1232 txvq->last_avail_idx++;
1233 txvq->used->ring[txvq->last_used_idx & qsz_mask].id =
1235 txvq->used->ring[txvq->last_used_idx & qsz_mask].len = 0;
1236 vhost_user_log_dirty_ring (vui, txvq,
1237 ring[txvq->last_used_idx & qsz_mask]);
1238 txvq->last_used_idx++;
1240 //It is important to free RX as fast as possible such that the TX
1241 //process does not drop packets
1242 if ((txvq->last_used_idx & 0x3f) == 0) // Every 64 packets
1243 txvq->used->idx = txvq->last_used_idx;
1245 if (PREDICT_FALSE (b_head->current_length < 14 &&
1246 error == VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR))
1247 error = VHOST_USER_INPUT_FUNC_ERROR_UNDERSIZED_FRAME;
1249 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b_head);
1251 vnet_buffer (b_head)->sw_if_index[VLIB_RX] = vui->sw_if_index;
1252 vnet_buffer (b_head)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1253 b_head->error = node->errors[error];
1255 if (PREDICT_FALSE (n_trace > n_rx_packets))
1256 vec_add1 (vui->d_trace_buffers, bi_head);
1258 if (PREDICT_FALSE (error))
1261 next0 = VHOST_USER_RX_NEXT_DROP;
1266 b_head->current_length +
1267 b_head->total_length_not_including_first_buffer;
1269 next0 = VHOST_USER_RX_NEXT_ETHERNET_INPUT;
1272 to_next[0] = bi_head;
1275 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1276 to_next, n_left_to_next,
1281 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1285 if (PREDICT_TRUE (vum->rx_buffers[cpu_index] != 0))
1286 _vec_len (vum->rx_buffers[cpu_index]) = rx_len;
1288 /* give buffers back to driver */
1289 CLIB_MEMORY_BARRIER ();
1290 txvq->used->idx = txvq->last_used_idx;
1291 vhost_user_log_dirty_ring (vui, txvq, idx);
1293 if (PREDICT_FALSE (vec_len (vui->d_trace_buffers) > 0))
1295 vhost_user_rx_trace (vm, node, vui, VHOST_NET_VRING_IDX_TX);
1296 vlib_set_trace_count (vm, node,
1297 n_trace - vec_len (vui->d_trace_buffers));
1300 /* interrupt (call) handling */
1301 if ((txvq->callfd > -1) && !(txvq->avail->flags & 1))
1303 txvq->n_since_last_int += n_rx_packets;
1305 if (txvq->n_since_last_int > vum->coalesce_frames)
1306 vhost_user_send_call (vm, txvq);
1309 if (PREDICT_FALSE (drops))
1311 vlib_increment_simple_counter
1312 (vnet_main.interface_main.sw_if_counters
1313 + VNET_INTERFACE_COUNTER_DROP, os_get_cpu_number (),
1314 vui->sw_if_index, drops);
1317 /* increase rx counters */
1318 vlib_increment_combined_counter
1319 (vnet_main.interface_main.combined_sw_if_counters
1320 + VNET_INTERFACE_COUNTER_RX,
1321 os_get_cpu_number (), vui->sw_if_index, n_rx_packets, n_rx_bytes);
1323 return n_rx_packets;
1327 vhost_user_input (vlib_main_t * vm,
1328 vlib_node_runtime_t * node, vlib_frame_t * f)
1330 vhost_user_main_t *vum = &vhost_user_main;
1331 u32 cpu_index = os_get_cpu_number ();
1332 vhost_user_intf_t *vui;
1333 uword n_rx_packets = 0;
1336 for (i = 0; i < vec_len (vum->vhost_user_interfaces); i++)
1338 vui = vec_elt_at_index (vum->vhost_user_interfaces, i);
1341 if ((i % vum->input_cpu_count) ==
1342 (cpu_index - vum->input_cpu_first_index))
1343 n_rx_packets += vhost_user_if_input (vm, vum, vui, node);
1346 return n_rx_packets;
1350 VLIB_REGISTER_NODE (vhost_user_input_node) = {
1351 .function = vhost_user_input,
1352 .type = VLIB_NODE_TYPE_INPUT,
1353 .name = "vhost-user-input",
1355 /* Will be enabled if/when hardware is detected. */
1356 .state = VLIB_NODE_STATE_DISABLED,
1358 .format_buffer = format_ethernet_header_with_length,
1359 .format_trace = format_vhost_user_input_trace,
1361 .n_errors = VHOST_USER_INPUT_FUNC_N_ERROR,
1362 .error_strings = vhost_user_input_func_error_strings,
1364 .n_next_nodes = VHOST_USER_RX_N_NEXT,
1366 [VHOST_USER_RX_NEXT_DROP] = "error-drop",
1367 [VHOST_USER_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
1371 VLIB_NODE_FUNCTION_MULTIARCH (vhost_user_input_node, vhost_user_input)
1375 vhost_user_intfc_tx (vlib_main_t * vm,
1376 vlib_node_runtime_t * node, vlib_frame_t * frame)
1378 u32 *buffers = vlib_frame_args (frame);
1380 vhost_user_main_t *vum = &vhost_user_main;
1381 uword n_packets = 0;
1382 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
1383 vhost_user_intf_t *vui =
1384 vec_elt_at_index (vum->vhost_user_interfaces, rd->dev_instance);
1385 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_NET_VRING_IDX_RX];
1387 u8 error = VHOST_USER_TX_FUNC_ERROR_NONE;
1389 n_left = n_packets = frame->n_vectors;
1391 if (PREDICT_FALSE (!vui->is_up))
1395 (!rxvq->desc || !rxvq->avail || vui->sock_errno != 0 || !rxvq->enabled))
1397 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1401 if (PREDICT_FALSE (vui->lockp != 0))
1403 while (__sync_lock_test_and_set (vui->lockp, 1))
1407 /* only bit 0 of avail.flags is used so we don't want to deal with this
1408 interface if any other bit is set */
1409 if (PREDICT_FALSE (rxvq->avail->flags & 0xFFFE))
1411 error = VHOST_USER_TX_FUNC_ERROR_NOT_READY;
1415 if (PREDICT_FALSE ((rxvq->avail->idx == rxvq->last_avail_idx)))
1417 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1421 qsz_mask = rxvq->qsz - 1; /* qsz is always power of 2 */
1425 vlib_buffer_t *b0, *current_b0;
1426 u16 desc_head, desc_index, desc_len;
1427 vring_desc_t *desc_table;
1431 b0 = vlib_get_buffer (vm, buffers[0]);
1434 if (PREDICT_FALSE (rxvq->last_avail_idx == rxvq->avail->idx))
1436 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1440 desc_table = rxvq->desc;
1441 desc_head = desc_index =
1442 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1443 if (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT)
1446 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1448 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1453 map_guest_mem (vui, rxvq->desc[desc_index].addr))))
1455 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1461 desc_len = vui->virtio_net_hdr_sz;
1464 (!(buffer_addr = map_guest_mem (vui, desc_table[desc_index].addr))))
1466 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1469 buffer_len = desc_table[desc_index].len;
1471 CLIB_PREFETCH (buffer_addr,
1472 clib_min (buffer_len, 2 * CLIB_CACHE_LINE_BYTES), STORE);
1474 virtio_net_hdr_mrg_rxbuf_t *hdr =
1475 (virtio_net_hdr_mrg_rxbuf_t *) buffer_addr;
1477 hdr->hdr.gso_type = 0;
1478 if (vui->virtio_net_hdr_sz == 12)
1479 hdr->num_buffers = 1;
1481 vhost_user_log_dirty_pages (vui, desc_table[desc_index].addr,
1482 vui->virtio_net_hdr_sz);
1484 u16 bytes_left = b0->current_length;
1485 buffer_addr += vui->virtio_net_hdr_sz;
1486 buffer_len -= vui->virtio_net_hdr_sz;
1492 if (current_b0->flags & VLIB_BUFFER_NEXT_PRESENT)
1494 current_b0 = vlib_get_buffer (vm, current_b0->next_buffer);
1495 bytes_left = current_b0->current_length;
1504 if (buffer_len == 0)
1506 if (desc_table[desc_index].flags & VIRTQ_DESC_F_NEXT)
1508 //Next one is chained
1509 desc_index = desc_table[desc_index].next;
1512 map_guest_mem (vui, desc_table[desc_index].addr))))
1514 rxvq->last_used_idx -= hdr->num_buffers - 1;
1515 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1516 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1519 buffer_len = desc_table[desc_index].len;
1521 else if (vui->virtio_net_hdr_sz == 12) //MRG is available
1523 //Move from available to used buffer
1524 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id =
1526 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len =
1528 vhost_user_log_dirty_ring (vui, rxvq,
1529 ring[rxvq->last_used_idx &
1531 rxvq->last_avail_idx++;
1532 rxvq->last_used_idx++;
1536 (rxvq->last_avail_idx == rxvq->avail->idx))
1538 //Dequeue queued descriptors for this packet
1539 rxvq->last_used_idx -= hdr->num_buffers - 1;
1540 rxvq->last_avail_idx -= hdr->num_buffers - 1;
1541 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOBUF;
1545 desc_table = rxvq->desc;
1546 desc_head = desc_index =
1547 rxvq->avail->ring[rxvq->last_avail_idx & qsz_mask];
1549 (rxvq->desc[desc_head].flags & VIRTQ_DESC_F_INDIRECT))
1551 //It is seriously unlikely that a driver will put indirect descriptor
1552 //after non-indirect descriptor.
1554 (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
1556 error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
1562 rxvq->desc[desc_index].addr))))
1564 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1572 map_guest_mem (vui, desc_table[desc_index].addr))))
1574 error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
1577 buffer_len = desc_table[desc_index].len;
1578 CLIB_PREFETCH (buffer_addr,
1579 clib_min (buffer_len,
1580 2 * CLIB_CACHE_LINE_BYTES), STORE);
1584 error = VHOST_USER_TX_FUNC_ERROR_PKT_DROP_NOMRG;
1589 u16 bytes_to_copy = bytes_left;
1591 (bytes_to_copy > buffer_len) ? buffer_len : bytes_to_copy;
1592 clib_memcpy (buffer_addr,
1593 vlib_buffer_get_current (current_b0) +
1594 current_b0->current_length - bytes_left,
1597 vhost_user_log_dirty_pages (vui,
1598 desc_table[desc_index].addr +
1599 desc_table[desc_index].len -
1600 bytes_left - bytes_to_copy,
1603 bytes_left -= bytes_to_copy;
1604 buffer_len -= bytes_to_copy;
1605 buffer_addr += bytes_to_copy;
1606 desc_len += bytes_to_copy;
1609 if (PREDICT_TRUE (n_left >= 2))
1611 vlib_prefetch_buffer_with_index (vm, buffers[1], STORE);
1612 CLIB_PREFETCH (&n_left, sizeof (n_left), STORE);
1615 //Move from available to used ring
1616 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].id = desc_head;
1617 rxvq->used->ring[rxvq->last_used_idx & qsz_mask].len = desc_len;
1618 vhost_user_log_dirty_ring (vui, rxvq,
1619 ring[rxvq->last_used_idx & qsz_mask]);
1621 rxvq->last_avail_idx++;
1622 rxvq->last_used_idx++;
1624 n_left--; //At the end for error counting when 'goto done' is invoked
1628 CLIB_MEMORY_BARRIER ();
1629 rxvq->used->idx = rxvq->last_used_idx;
1630 vhost_user_log_dirty_ring (vui, rxvq, idx);
1632 /* interrupt (call) handling */
1633 if ((rxvq->callfd > -1) && !(rxvq->avail->flags & 1))
1635 rxvq->n_since_last_int += n_packets - n_left;
1637 if (rxvq->n_since_last_int > vum->coalesce_frames)
1638 vhost_user_send_call (vm, rxvq);
1643 if (PREDICT_FALSE (vui->lockp != 0))
1646 if (PREDICT_FALSE (n_left && error != VHOST_USER_TX_FUNC_ERROR_NONE))
1648 vlib_error_count (vm, node->node_index, error, n_left);
1649 vlib_increment_simple_counter
1650 (vnet_main.interface_main.sw_if_counters
1651 + VNET_INTERFACE_COUNTER_DROP,
1652 os_get_cpu_number (), vui->sw_if_index, n_left);
1655 vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
1656 return frame->n_vectors;
1659 static clib_error_t *
1660 vhost_user_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
1663 vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
1664 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
1665 vhost_user_main_t *vum = &vhost_user_main;
1666 vhost_user_intf_t *vui =
1667 vec_elt_at_index (vum->vhost_user_interfaces, hif->dev_instance);
1669 vui->admin_up = is_up;
1672 vnet_hw_interface_set_flags (vnm, vui->hw_if_index,
1673 VNET_HW_INTERFACE_FLAG_LINK_UP);
1675 return /* no error */ 0;
1679 VNET_DEVICE_CLASS (vhost_user_dev_class,static) = {
1680 .name = "vhost-user",
1681 .tx_function = vhost_user_intfc_tx,
1682 .tx_function_n_errors = VHOST_USER_TX_FUNC_N_ERROR,
1683 .tx_function_error_strings = vhost_user_tx_func_error_strings,
1684 .format_device_name = format_vhost_user_interface_name,
1685 .name_renumber = vhost_user_name_renumber,
1686 .admin_up_down_function = vhost_user_interface_admin_up_down,
1687 .no_flatten_output_chains = 1,
1690 VLIB_DEVICE_TX_FUNCTION_MULTIARCH (vhost_user_dev_class,
1691 vhost_user_intfc_tx)
1695 vhost_user_process (vlib_main_t * vm,
1696 vlib_node_runtime_t * rt, vlib_frame_t * f)
1698 vhost_user_main_t *vum = &vhost_user_main;
1699 vhost_user_intf_t *vui;
1700 struct sockaddr_un sun;
1702 unix_file_t template = { 0 };
1703 f64 timeout = 3153600000.0 /* 100 years */ ;
1704 uword *event_data = 0;
1706 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1707 sun.sun_family = AF_UNIX;
1708 template.read_function = vhost_user_socket_read;
1709 template.error_function = vhost_user_socket_error;
1717 vlib_process_wait_for_event_or_clock (vm, timeout);
1718 vlib_process_get_events (vm, &event_data);
1719 vec_reset_length (event_data);
1723 vec_foreach (vui, vum->vhost_user_interfaces)
1726 if (vui->sock_is_server || !vui->active)
1729 if (vui->unix_fd == -1)
1731 /* try to connect */
1733 strncpy (sun.sun_path, (char *) vui->sock_filename,
1734 sizeof (sun.sun_path) - 1);
1737 (sockfd, (struct sockaddr *) &sun,
1738 sizeof (struct sockaddr_un)) == 0)
1740 vui->sock_errno = 0;
1741 vui->unix_fd = sockfd;
1742 template.file_descriptor = sockfd;
1743 vui->unix_file_index = unix_file_add (&unix_main, &template);
1744 hash_set (vum->vhost_user_interface_index_by_sock_fd, sockfd,
1745 vui - vum->vhost_user_interfaces);
1747 sockfd = socket (AF_UNIX, SOCK_STREAM, 0);
1753 vui->sock_errno = errno;
1758 /* check if socket is alive */
1760 socklen_t len = sizeof (error);
1762 getsockopt (vui->unix_fd, SOL_SOCKET, SO_ERROR, &error, &len);
1765 vhost_user_if_disconnect (vui);
1773 VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
1774 .function = vhost_user_process,
1775 .type = VLIB_NODE_TYPE_PROCESS,
1776 .name = "vhost-user-process",
1781 vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
1783 vhost_user_main_t *vum = &vhost_user_main;
1784 vhost_user_intf_t *vui;
1788 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
1791 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1795 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
1798 // interface is inactive
1800 // disconnect interface sockets
1801 vhost_user_if_disconnect (vui);
1802 // add to inactive interface list
1803 vec_add1 (vum->vhost_user_inactive_interfaces_index, p[0]);
1805 // reset renumbered iface
1806 if (p[0] < vec_len (vum->show_dev_instance_by_real_dev_instance))
1807 vum->show_dev_instance_by_real_dev_instance[p[0]] = ~0;
1809 ethernet_delete_interface (vnm, vui->hw_if_index);
1810 DBG_SOCK ("deleted (deactivated) vhost-user interface instance %d", p[0]);
1815 // init server socket on specified sock_filename
1817 vhost_user_init_server_sock (const char *sock_filename, int *sockfd)
1820 struct sockaddr_un un = { };
1822 /* create listening socket */
1823 fd = socket (AF_UNIX, SOCK_STREAM, 0);
1827 return VNET_API_ERROR_SYSCALL_ERROR_1;
1830 un.sun_family = AF_UNIX;
1831 strncpy ((char *) un.sun_path, (char *) sock_filename,
1832 sizeof (un.sun_path) - 1);
1834 /* remove if exists */
1835 unlink ((char *) sock_filename);
1837 if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
1839 rv = VNET_API_ERROR_SYSCALL_ERROR_2;
1843 if (listen (fd, 1) == -1)
1845 rv = VNET_API_ERROR_SYSCALL_ERROR_3;
1849 unix_file_t template = { 0 };
1850 template.read_function = vhost_user_socksvr_accept_ready;
1851 template.file_descriptor = fd;
1852 unix_file_add (&unix_main, &template);
1861 // get new vhost_user_intf_t from inactive interfaces or create new one
1862 static vhost_user_intf_t *
1863 vhost_user_vui_new ()
1865 vhost_user_main_t *vum = &vhost_user_main;
1866 vhost_user_intf_t *vui = NULL;
1867 int inactive_cnt = vec_len (vum->vhost_user_inactive_interfaces_index);
1868 // if there are any inactive ifaces
1869 if (inactive_cnt > 0)
1873 vum->vhost_user_inactive_interfaces_index[inactive_cnt - 1];
1874 if (vec_len (vum->vhost_user_interfaces) > vui_idx)
1876 vui = vec_elt_at_index (vum->vhost_user_interfaces, vui_idx);
1877 DBG_SOCK ("reusing inactive vhost-user interface index %d",
1880 // "remove" from inactive list
1881 _vec_len (vum->vhost_user_inactive_interfaces_index) -= 1;
1884 // vui was not retrieved from inactive ifaces - create new
1886 vec_add2 (vum->vhost_user_interfaces, vui, 1);
1890 // create ethernet interface for vhost user intf
1892 vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
1893 vhost_user_intf_t * vui, u8 * hwaddress)
1895 vhost_user_main_t *vum = &vhost_user_main;
1897 clib_error_t *error;
1899 /* create hw and sw interface */
1902 clib_memcpy (hwaddr, hwaddress, 6);
1906 f64 now = vlib_time_now (vm);
1908 rnd = (u32) (now * 1e6);
1909 rnd = random_u32 (&rnd);
1911 clib_memcpy (hwaddr + 2, &rnd, sizeof (rnd));
1916 error = ethernet_register_interface
1918 vhost_user_dev_class.index,
1919 vui - vum->vhost_user_interfaces /* device instance */ ,
1920 hwaddr /* ethernet address */ ,
1921 &vui->hw_if_index, 0 /* flag change */ );
1923 clib_error_report (error);
1925 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, vui->hw_if_index);
1926 hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000;
1929 // initialize vui with specified attributes
1931 vhost_user_vui_init (vnet_main_t * vnm,
1932 vhost_user_intf_t * vui, int sockfd,
1933 const char *sock_filename,
1934 u8 is_server, u64 feature_mask, u32 * sw_if_index)
1936 vnet_sw_interface_t *sw;
1937 sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
1938 vlib_thread_main_t *tm = vlib_get_thread_main ();
1941 vui->unix_fd = sockfd;
1942 vui->sw_if_index = sw->sw_if_index;
1943 vui->num_vrings = 2;
1944 vui->sock_is_server = is_server;
1945 strncpy (vui->sock_filename, sock_filename,
1946 ARRAY_LEN (vui->sock_filename) - 1);
1947 vui->sock_errno = 0;
1949 vui->feature_mask = feature_mask;
1951 vui->unix_file_index = ~0;
1952 vui->log_base_addr = 0;
1954 for (q = 0; q < 2; q++)
1956 vui->vrings[q].enabled = 0;
1957 vui->vrings[q].callfd = -1;
1958 vui->vrings[q].kickfd = -1;
1961 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
1964 *sw_if_index = vui->sw_if_index;
1966 if (tm->n_vlib_mains > 1)
1968 vui->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1969 CLIB_CACHE_LINE_BYTES);
1970 memset ((void *) vui->lockp, 0, CLIB_CACHE_LINE_BYTES);
1974 // register vui and start polling on it
1976 vhost_user_vui_register (vlib_main_t * vm, vhost_user_intf_t * vui)
1978 vhost_user_main_t *vum = &vhost_user_main;
1980 vlib_thread_main_t *tm = vlib_get_thread_main ();
1982 hash_set (vum->vhost_user_interface_index_by_listener_fd, vui->unix_fd,
1983 vui - vum->vhost_user_interfaces);
1984 hash_set (vum->vhost_user_interface_index_by_sw_if_index, vui->sw_if_index,
1985 vui - vum->vhost_user_interfaces);
1988 cpu_index = vum->input_cpu_first_index +
1989 (vui - vum->vhost_user_interfaces) % vum->input_cpu_count;
1991 if (tm->n_vlib_mains == 1)
1992 vlib_node_set_state (vm, vhost_user_input_node.index,
1993 VLIB_NODE_STATE_POLLING);
1995 vlib_node_set_state (vlib_mains[cpu_index], vhost_user_input_node.index,
1996 VLIB_NODE_STATE_POLLING);
1998 /* tell process to start polling for sockets */
1999 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
2003 vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
2004 const char *sock_filename,
2008 u8 renumber, u32 custom_dev_instance, u8 * hwaddr)
2010 vhost_user_intf_t *vui = NULL;
2017 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
2023 vui = vhost_user_vui_new ();
2024 ASSERT (vui != NULL);
2026 vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
2027 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
2028 feature_mask, &sw_if_idx);
2032 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
2035 vhost_user_vui_register (vm, vui);
2038 *sw_if_index = sw_if_idx;
2044 vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
2045 const char *sock_filename,
2048 u64 feature_mask, u8 renumber, u32 custom_dev_instance)
2050 vhost_user_main_t *vum = &vhost_user_main;
2051 vhost_user_intf_t *vui = NULL;
2057 p = hash_get (vum->vhost_user_interface_index_by_sw_if_index, sw_if_index);
2060 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
2064 vui = vec_elt_at_index (vum->vhost_user_interfaces, p[0]);
2067 // interface is inactive
2069 // disconnect interface sockets
2070 vhost_user_if_disconnect (vui);
2074 if ((rv = vhost_user_init_server_sock (sock_filename, &sockfd)) != 0)
2080 vhost_user_vui_init (vnm, vui, sockfd, sock_filename, is_server,
2081 feature_mask, &sw_if_idx);
2085 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
2088 vhost_user_vui_register (vm, vui);
2094 vhost_user_connect_command_fn (vlib_main_t * vm,
2095 unformat_input_t * input,
2096 vlib_cli_command_t * cmd)
2098 unformat_input_t _line_input, *line_input = &_line_input;
2099 u8 *sock_filename = NULL;
2102 u64 feature_mask = (u64) ~ 0;
2104 u32 custom_dev_instance = ~0;
2108 /* Get a line of input. */
2109 if (!unformat_user (input, unformat_line_input, line_input))
2112 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2114 if (unformat (line_input, "socket %s", &sock_filename))
2116 else if (unformat (line_input, "server"))
2118 else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
2122 (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
2124 else if (unformat (line_input, "renumber %d", &custom_dev_instance))
2129 return clib_error_return (0, "unknown input `%U'",
2130 format_unformat_error, input);
2132 unformat_free (line_input);
2134 vnet_main_t *vnm = vnet_get_main ();
2137 if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
2138 is_server, &sw_if_index, feature_mask,
2139 renumber, custom_dev_instance, hw)))
2141 vec_free (sock_filename);
2142 return clib_error_return (0, "vhost_user_create_if returned %d", rv);
2145 vec_free (sock_filename);
2146 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
2152 vhost_user_delete_command_fn (vlib_main_t * vm,
2153 unformat_input_t * input,
2154 vlib_cli_command_t * cmd)
2156 unformat_input_t _line_input, *line_input = &_line_input;
2157 u32 sw_if_index = ~0;
2159 /* Get a line of input. */
2160 if (!unformat_user (input, unformat_line_input, line_input))
2163 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
2165 if (unformat (line_input, "sw_if_index %d", &sw_if_index))
2168 return clib_error_return (0, "unknown input `%U'",
2169 format_unformat_error, input);
2171 unformat_free (line_input);
2173 vnet_main_t *vnm = vnet_get_main ();
2175 vhost_user_delete_if (vnm, vm, sw_if_index);
2181 vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
2182 vhost_user_intf_details_t ** out_vuids)
2185 vhost_user_main_t *vum = &vhost_user_main;
2186 vhost_user_intf_t *vui;
2187 vhost_user_intf_details_t *r_vuids = NULL;
2188 vhost_user_intf_details_t *vuid = NULL;
2189 u32 *hw_if_indices = 0;
2190 vnet_hw_interface_t *hi;
2197 vec_foreach (vui, vum->vhost_user_interfaces)
2200 vec_add1 (hw_if_indices, vui->hw_if_index);
2203 for (i = 0; i < vec_len (hw_if_indices); i++)
2205 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2206 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2208 vec_add2 (r_vuids, vuid, 1);
2209 vuid->sw_if_index = vui->sw_if_index;
2210 vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
2211 vuid->features = vui->features;
2212 vuid->is_server = vui->sock_is_server;
2213 vuid->num_regions = vui->nregions;
2214 vuid->sock_errno = vui->sock_errno;
2215 strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
2216 ARRAY_LEN (vuid->sock_filename) - 1);
2218 s = format (s, "%v%c", hi->name, 0);
2220 strncpy ((char *) vuid->if_name, (char *) s,
2221 ARRAY_LEN (vuid->if_name) - 1);
2226 vec_free (hw_if_indices);
2228 *out_vuids = r_vuids;
2234 show_vhost_user_command_fn (vlib_main_t * vm,
2235 unformat_input_t * input,
2236 vlib_cli_command_t * cmd)
2238 clib_error_t *error = 0;
2239 vnet_main_t *vnm = vnet_get_main ();
2240 vhost_user_main_t *vum = &vhost_user_main;
2241 vhost_user_intf_t *vui;
2242 u32 hw_if_index, *hw_if_indices = 0;
2243 vnet_hw_interface_t *hi;
2251 struct feat_struct *feat_entry;
2253 static struct feat_struct feat_array[] = {
2254 #define _(s,b) { .str = #s, .bit = b, },
2255 foreach_virtio_net_feature
2260 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2263 (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
2265 vec_add1 (hw_if_indices, hw_if_index);
2266 vlib_cli_output (vm, "add %d", hw_if_index);
2268 else if (unformat (input, "descriptors") || unformat (input, "desc"))
2272 error = clib_error_return (0, "unknown input `%U'",
2273 format_unformat_error, input);
2277 if (vec_len (hw_if_indices) == 0)
2279 vec_foreach (vui, vum->vhost_user_interfaces)
2282 vec_add1 (hw_if_indices, vui->hw_if_index);
2285 vlib_cli_output (vm, "Virtio vhost-user interfaces");
2286 vlib_cli_output (vm, "Global:\n coalesce frames %d time %e\n\n",
2287 vum->coalesce_frames, vum->coalesce_time);
2289 for (i = 0; i < vec_len (hw_if_indices); i++)
2291 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2292 vui = vec_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2293 vlib_cli_output (vm, "Interface: %s (ifindex %d)",
2294 hi->name, hw_if_indices[i]);
2296 vlib_cli_output (vm, "virtio_net_hdr_sz %d\n features (0x%llx): \n",
2297 vui->virtio_net_hdr_sz, vui->features);
2299 feat_entry = (struct feat_struct *) &feat_array;
2300 while (feat_entry->str)
2302 if (vui->features & (1 << feat_entry->bit))
2303 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
2308 vlib_cli_output (vm, "\n");
2311 vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
2313 vui->sock_is_server ? "server" : "client",
2314 strerror (vui->sock_errno));
2316 vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
2320 vlib_cli_output (vm,
2321 " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
2322 vlib_cli_output (vm,
2323 " ====== ===== ================== ================== ================== ================== ==================\n");
2325 for (j = 0; j < vui->nregions; j++)
2327 vlib_cli_output (vm,
2328 " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
2329 j, vui->region_mmap_fd[j],
2330 vui->regions[j].guest_phys_addr,
2331 vui->regions[j].memory_size,
2332 vui->regions[j].userspace_addr,
2333 vui->regions[j].mmap_offset,
2334 pointer_to_uword (vui->region_mmap_addr[j]));
2336 for (q = 0; q < vui->num_vrings; q++)
2338 vlib_cli_output (vm, "\n Virtqueue %d\n", q);
2340 vlib_cli_output (vm,
2341 " qsz %d last_avail_idx %d last_used_idx %d\n",
2342 vui->vrings[q].qsz, vui->vrings[q].last_avail_idx,
2343 vui->vrings[q].last_used_idx);
2345 if (vui->vrings[q].avail && vui->vrings[q].used)
2346 vlib_cli_output (vm,
2347 " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
2348 vui->vrings[q].avail->flags,
2349 vui->vrings[q].avail->idx,
2350 vui->vrings[q].used->flags,
2351 vui->vrings[q].used->idx);
2353 vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
2354 vui->vrings[q].kickfd,
2355 vui->vrings[q].callfd, vui->vrings[q].errfd);
2359 vlib_cli_output (vm, "\n descriptor table:\n");
2360 vlib_cli_output (vm,
2361 " id addr len flags next user_addr\n");
2362 vlib_cli_output (vm,
2363 " ===== ================== ===== ====== ===== ==================\n");
2364 for (j = 0; j < vui->vrings[q].qsz; j++)
2366 vlib_cli_output (vm,
2367 " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
2368 j, vui->vrings[q].desc[j].addr,
2369 vui->vrings[q].desc[j].len,
2370 vui->vrings[q].desc[j].flags,
2371 vui->vrings[q].desc[j].next,
2372 pointer_to_uword (map_guest_mem
2374 vui->vrings[q].desc[j].
2379 vlib_cli_output (vm, "\n");
2382 vec_free (hw_if_indices);
2392 VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
2393 .path = "create vhost-user",
2394 .short_help = "create vhost-user socket <socket-filename> [server] [feature-mask <hex>] [renumber <dev_instance>]",
2395 .function = vhost_user_connect_command_fn,
2398 VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
2399 .path = "delete vhost-user",
2400 .short_help = "delete vhost-user sw_if_index <nn>",
2401 .function = vhost_user_delete_command_fn,
2404 VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
2405 .path = "show vhost-user",
2406 .short_help = "show vhost-user interface",
2407 .function = show_vhost_user_command_fn,
2412 static clib_error_t *
2413 vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
2415 vhost_user_main_t *vum = &vhost_user_main;
2417 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2419 if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
2421 else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
2423 else if (unformat (input, "dont-dump-memory"))
2424 vum->dont_dump_vhost_user_memory = 1;
2426 return clib_error_return (0, "unknown input `%U'",
2427 format_unformat_error, input);
2433 /* vhost-user { ... } configuration. */
2434 VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
2437 vhost_user_unmap_all (void)
2439 vhost_user_main_t *vum = &vhost_user_main;
2440 vhost_user_intf_t *vui;
2442 if (vum->dont_dump_vhost_user_memory)
2444 vec_foreach (vui, vum->vhost_user_interfaces)
2446 unmap_all_mem_regions (vui);
2452 * fd.io coding-style-patch-verification: ON
2455 * eval: (c-set-style "gnu")