2 *------------------------------------------------------------------
5 * Copyright (c) 2014-2018 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/ethernet/ethernet.h>
37 #include <vnet/devices/devices.h>
38 #include <vnet/feature/feature.h>
40 #include <vnet/devices/virtio/vhost_user.h>
41 #include <vnet/devices/virtio/vhost_user_inline.h>
45 * @brief vHost User Device Driver.
47 * This file contains the source code for vHost User interface.
51 vlib_node_registration_t vhost_user_send_interrupt_node;
54 vhost_user_main_t vhost_user_main = {
58 VNET_HW_INTERFACE_CLASS (vhost_interface_class, static) = {
64 get_huge_page_size (int fd)
72 unmap_all_mem_regions (vhost_user_intf_t * vui)
75 vhost_user_vring_t *vq;
77 for (i = 0; i < vui->nregions; i++)
79 if (vui->region_mmap_addr[i] != MAP_FAILED)
82 long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
84 ssize_t map_sz = (vui->regions[i].memory_size +
85 vui->regions[i].mmap_offset +
86 page_sz - 1) & ~(page_sz - 1);
89 munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
92 vu_log_debug (vui, "unmap memory region %d addr 0x%lx len 0x%lx "
93 "page_sz 0x%x", i, vui->region_mmap_addr[i], map_sz,
96 vui->region_mmap_addr[i] = MAP_FAILED;
100 vu_log_err (vui, "failed to unmap memory region (errno %d)",
103 close (vui->region_mmap_fd[i]);
108 for (q = 0; q < VHOST_VRING_MAX_N; q++)
110 vq = &vui->vrings[q];
117 static_always_inline void
118 vhost_user_tx_thread_placement (vhost_user_intf_t * vui)
120 //Let's try to assign one queue to each thread
122 u32 thread_index = 0;
124 vui->use_tx_spinlock = 0;
127 for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
129 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
130 if (!rxvq->started || !rxvq->enabled)
133 vui->per_cpu_tx_qid[thread_index] = qid;
135 if (thread_index == vlib_get_thread_main ()->n_vlib_mains)
138 //We need to loop, meaning the spinlock has to be used
139 vui->use_tx_spinlock = 1;
140 if (thread_index == 0)
142 //Could not find a single valid one
143 for (thread_index = 0;
144 thread_index < vlib_get_thread_main ()->n_vlib_mains;
147 vui->per_cpu_tx_qid[thread_index] = 0;
155 * @brief Unassign existing interface/queue to thread mappings and re-assign
156 * new interface/queue to thread mappings
158 static_always_inline void
159 vhost_user_rx_thread_placement (vhost_user_intf_t * vui, u32 qid)
161 vhost_user_vring_t *txvq = &vui->vrings[qid];
162 vnet_main_t *vnm = vnet_get_main ();
166 ASSERT ((qid & 1) == 1); // should be odd
167 // Assign new queue mappings for the interface
168 vnet_hw_interface_set_input_node (vnm, vui->hw_if_index,
169 vhost_user_input_node.index);
170 vnet_hw_interface_assign_rx_thread (vnm, vui->hw_if_index, q, ~0);
171 if (txvq->mode == VNET_HW_IF_RX_MODE_UNKNOWN)
172 /* Set polling as the default */
173 txvq->mode = VNET_HW_IF_RX_MODE_POLLING;
175 rv = vnet_hw_interface_set_rx_mode (vnm, vui->hw_if_index, q, txvq->mode);
177 vu_log_warn (vui, "unable to set rx mode for interface %d, "
178 "queue %d: rc=%d", vui->hw_if_index, q, rv);
181 /** @brief Returns whether at least one TX and one RX vring are enabled */
182 static_always_inline int
183 vhost_user_intf_ready (vhost_user_intf_t * vui)
185 int i, found[2] = { }; //RX + TX
187 for (i = 0; i < VHOST_VRING_MAX_N; i++)
188 if (vui->vrings[i].started && vui->vrings[i].enabled)
191 return found[0] && found[1];
194 static_always_inline void
195 vhost_user_update_iface_state (vhost_user_intf_t * vui)
197 /* if we have pointers to descriptor table, go up */
198 int is_ready = vhost_user_intf_ready (vui);
199 if (is_ready != vui->is_ready)
201 vu_log_debug (vui, "interface %d %s", vui->sw_if_index,
202 is_ready ? "ready" : "down");
204 vnet_hw_interface_set_flags (vnet_get_main (), vui->hw_if_index,
205 is_ready ? VNET_HW_INTERFACE_FLAG_LINK_UP
207 vui->is_ready = is_ready;
212 vhost_user_set_interrupt_pending (vhost_user_intf_t * vui, u32 ifq)
215 vnet_main_t *vnm = vnet_get_main ();
219 /* Only care about the odd number, or TX, virtqueue */
222 if (vhost_user_intf_ready (vui))
223 // qid >> 1 is to convert virtqueue number to vring queue index
224 vnet_device_input_set_interrupt_pending (vnm, vui->hw_if_index, qid >> 1);
227 static clib_error_t *
228 vhost_user_callfd_read_ready (clib_file_t * uf)
230 __attribute__ ((unused)) int n;
233 n = read (uf->file_descriptor, ((char *) &buff), 8);
238 static_always_inline void
239 vhost_user_thread_placement (vhost_user_intf_t * vui, u32 qid)
241 if (qid & 1) // RX is odd, TX is even
243 if (vui->vrings[qid].qid == -1)
244 vhost_user_rx_thread_placement (vui, qid);
247 vhost_user_tx_thread_placement (vui);
250 static clib_error_t *
251 vhost_user_kickfd_read_ready (clib_file_t * uf)
253 __attribute__ ((unused)) int n;
255 vhost_user_intf_t *vui =
256 pool_elt_at_index (vhost_user_main.vhost_user_interfaces,
257 uf->private_data >> 8);
258 u32 qid = uf->private_data & 0xff;
260 n = read (uf->file_descriptor, ((char *) &buff), 8);
261 vu_log_debug (vui, "if %d KICK queue %d", uf->private_data >> 8, qid);
262 if (!vui->vrings[qid].started ||
263 (vhost_user_intf_ready (vui) != vui->is_ready))
265 if (vui->vrings[qid].started == 0)
267 vui->vrings[qid].started = 1;
268 vhost_user_thread_placement (vui, qid);
269 vhost_user_update_iface_state (vui);
273 vhost_user_set_interrupt_pending (vui, uf->private_data);
277 static_always_inline void
278 vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid)
280 vhost_user_vring_t *vring = &vui->vrings[qid];
281 clib_memset (vring, 0, sizeof (*vring));
282 vring->kickfd_idx = ~0;
283 vring->callfd_idx = ~0;
288 * We have a bug with some qemu 2.5, and this may be a fix.
289 * Feel like interpretation holy text, but this is from vhost-user.txt.
291 * One queue pair is enabled initially. More queues are enabled
292 * dynamically, by sending message VHOST_USER_SET_VRING_ENABLE.
294 * Don't know who's right, but this is what DPDK does.
296 if (qid == 0 || qid == 1)
300 static_always_inline void
301 vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid)
303 vhost_user_vring_t *vring = &vui->vrings[qid];
305 if (vring->kickfd_idx != ~0)
307 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
309 clib_file_del (&file_main, uf);
310 vring->kickfd_idx = ~0;
312 if (vring->callfd_idx != ~0)
314 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
316 clib_file_del (&file_main, uf);
317 vring->callfd_idx = ~0;
319 if (vring->errfd != -1)
321 close (vring->errfd);
325 // save the qid so that we don't need to unassign and assign_rx_thread
326 // when the interface comes back up. They are expensive calls.
327 u16 q = vui->vrings[qid].qid;
328 vhost_user_vring_init (vui, qid);
329 vui->vrings[qid].qid = q;
332 static_always_inline void
333 vhost_user_if_disconnect (vhost_user_intf_t * vui)
335 vnet_main_t *vnm = vnet_get_main ();
338 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
340 if (vui->clib_file_index != ~0)
342 clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
343 vui->clib_file_index = ~0;
348 for (q = 0; q < VHOST_VRING_MAX_N; q++)
349 vhost_user_vring_close (vui, q);
351 unmap_all_mem_regions (vui);
352 vu_log_debug (vui, "interface ifindex %d disconnected", vui->sw_if_index);
355 static clib_error_t *
356 vhost_user_socket_read (clib_file_t * uf)
359 int fd, number_of_fds = 0;
360 int fds[VHOST_MEMORY_MAX_NREGIONS];
361 vhost_user_msg_t msg;
364 vhost_user_main_t *vum = &vhost_user_main;
365 vhost_user_intf_t *vui;
366 struct cmsghdr *cmsg;
368 clib_file_t template = { 0 };
369 vnet_main_t *vnm = vnet_get_main ();
370 vlib_main_t *vm = vlib_get_main ();
372 vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
374 char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
376 clib_memset (&mh, 0, sizeof (mh));
377 clib_memset (control, 0, sizeof (control));
379 for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
382 /* set the payload */
383 iov[0].iov_base = (void *) &msg;
384 iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
388 mh.msg_control = control;
389 mh.msg_controllen = sizeof (control);
391 n = recvmsg (uf->file_descriptor, &mh, 0);
393 if (n != VHOST_USER_MSG_HDR_SZ)
397 vu_log_debug (vui, "recvmsg returned error %d %s", errno,
402 vu_log_debug (vui, "n (%d) != VHOST_USER_MSG_HDR_SZ (%d)",
403 n, VHOST_USER_MSG_HDR_SZ);
408 if (mh.msg_flags & MSG_CTRUNC)
410 vu_log_debug (vui, "MSG_CTRUNC is set");
414 cmsg = CMSG_FIRSTHDR (&mh);
416 if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
417 (cmsg->cmsg_type == SCM_RIGHTS) &&
418 (cmsg->cmsg_len - CMSG_LEN (0) <=
419 VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
421 number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
422 clib_memcpy_fast (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
425 /* version 1, no reply bit set */
426 if ((msg.flags & 7) != 1)
428 vu_log_debug (vui, "malformed message received. closing socket");
435 read (uf->file_descriptor, ((char *) &msg) + VHOST_USER_MSG_HDR_SZ,
439 vu_log_debug (vui, "read failed %s", strerror (errno));
442 else if (rv != msg.size)
444 vu_log_debug (vui, "message too short (read %dB should be %dB)", rv,
452 case VHOST_USER_GET_FEATURES:
454 msg.u64 = VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) |
455 VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ) |
456 VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT) |
457 VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC) |
458 VIRTIO_FEATURE (VHOST_F_LOG_ALL) |
459 VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_ANNOUNCE) |
460 VIRTIO_FEATURE (VIRTIO_NET_F_MQ) |
461 VIRTIO_FEATURE (VHOST_USER_F_PROTOCOL_FEATURES) |
462 VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
463 msg.u64 &= vui->feature_mask;
466 msg.u64 |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
467 if (vui->enable_packed)
468 msg.u64 |= VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
470 msg.size = sizeof (msg.u64);
471 vu_log_debug (vui, "if %d msg VHOST_USER_GET_FEATURES - reply "
472 "0x%016llx", vui->hw_if_index, msg.u64);
474 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
475 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
477 vu_log_debug (vui, "could not send message response");
482 case VHOST_USER_SET_FEATURES:
483 vu_log_debug (vui, "if %d msg VHOST_USER_SET_FEATURES features "
484 "0x%016llx", vui->hw_if_index, msg.u64);
486 vui->features = msg.u64;
489 (VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) |
490 VIRTIO_FEATURE (VIRTIO_F_VERSION_1)))
491 vui->virtio_net_hdr_sz = 12;
493 vui->virtio_net_hdr_sz = 10;
496 (vui->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) ? 1 : 0;
498 ASSERT (vui->virtio_net_hdr_sz < VLIB_BUFFER_PRE_DATA_SIZE);
499 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vui->hw_if_index);
500 if (vui->enable_gso &&
501 ((vui->features & FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS)
502 == FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS))
504 (VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
505 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
507 hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
508 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
509 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
511 vhost_user_update_iface_state (vui);
514 case VHOST_USER_SET_MEM_TABLE:
515 vu_log_debug (vui, "if %d msg VHOST_USER_SET_MEM_TABLE nregions %d",
516 vui->hw_if_index, msg.memory.nregions);
518 if ((msg.memory.nregions < 1) ||
519 (msg.memory.nregions > VHOST_MEMORY_MAX_NREGIONS))
521 vu_log_debug (vui, "number of mem regions must be between 1 and %i",
522 VHOST_MEMORY_MAX_NREGIONS);
526 if (msg.memory.nregions != number_of_fds)
528 vu_log_debug (vui, "each memory region must have FD");
532 /* Do the mmap without barrier sync */
533 void *region_mmap_addr[VHOST_MEMORY_MAX_NREGIONS];
534 for (i = 0; i < msg.memory.nregions; i++)
536 long page_sz = get_huge_page_size (fds[i]);
538 /* align size to page */
539 ssize_t map_sz = (msg.memory.regions[i].memory_size +
540 msg.memory.regions[i].mmap_offset +
541 page_sz - 1) & ~(page_sz - 1);
543 region_mmap_addr[i] = mmap (0, map_sz, PROT_READ | PROT_WRITE,
544 MAP_SHARED, fds[i], 0);
545 if (region_mmap_addr[i] == MAP_FAILED)
547 vu_log_err (vui, "failed to map memory. errno is %d", errno);
548 for (j = 0; j < i; j++)
549 munmap (region_mmap_addr[j], map_sz);
552 vu_log_debug (vui, "map memory region %d addr 0 len 0x%lx fd %d "
553 "mapped 0x%lx page_sz 0x%x", i, map_sz, fds[i],
554 region_mmap_addr[i], page_sz);
557 vlib_worker_thread_barrier_sync (vm);
558 unmap_all_mem_regions (vui);
559 for (i = 0; i < msg.memory.nregions; i++)
561 clib_memcpy_fast (&(vui->regions[i]), &msg.memory.regions[i],
562 sizeof (vhost_user_memory_region_t));
564 vui->region_mmap_addr[i] = region_mmap_addr[i];
565 vui->region_guest_addr_lo[i] = vui->regions[i].guest_phys_addr;
566 vui->region_guest_addr_hi[i] = vui->regions[i].guest_phys_addr +
567 vui->regions[i].memory_size;
569 vui->region_mmap_addr[i] += vui->regions[i].mmap_offset;
570 vui->region_mmap_fd[i] = fds[i];
576 * Re-compute desc, used, and avail descriptor table if vring address
579 for (q = 0; q < VHOST_VRING_MAX_N; q++)
581 if (vui->vrings[q].desc_user_addr &&
582 vui->vrings[q].used_user_addr && vui->vrings[q].avail_user_addr)
584 vui->vrings[q].desc =
585 map_user_mem (vui, vui->vrings[q].desc_user_addr);
586 vui->vrings[q].used =
587 map_user_mem (vui, vui->vrings[q].used_user_addr);
588 vui->vrings[q].avail =
589 map_user_mem (vui, vui->vrings[q].avail_user_addr);
592 vlib_worker_thread_barrier_release (vm);
595 case VHOST_USER_SET_VRING_NUM:
596 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
597 vui->hw_if_index, msg.state.index, msg.state.num);
599 if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
600 (msg.state.num == 0) || /* it cannot be zero */
601 ((msg.state.num - 1) & msg.state.num)) /* must be power of 2 */
603 vui->vrings[msg.state.index].qsz_mask = msg.state.num - 1;
606 case VHOST_USER_SET_VRING_ADDR:
607 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
608 vui->hw_if_index, msg.state.index);
610 if (msg.state.index >= VHOST_VRING_MAX_N)
612 vu_log_debug (vui, "invalid vring index VHOST_USER_SET_VRING_ADDR:"
613 " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
617 if (msg.size < sizeof (msg.addr))
619 vu_log_debug (vui, "vhost message is too short (%d < %d)",
620 msg.size, sizeof (msg.addr));
624 vring_desc_t *desc = map_user_mem (vui, msg.addr.desc_user_addr);
625 vring_used_t *used = map_user_mem (vui, msg.addr.used_user_addr);
626 vring_avail_t *avail = map_user_mem (vui, msg.addr.avail_user_addr);
628 if ((desc == NULL) || (used == NULL) || (avail == NULL))
630 vu_log_debug (vui, "failed to map user memory for hw_if_index %d",
635 vui->vrings[msg.state.index].desc_user_addr = msg.addr.desc_user_addr;
636 vui->vrings[msg.state.index].used_user_addr = msg.addr.used_user_addr;
637 vui->vrings[msg.state.index].avail_user_addr = msg.addr.avail_user_addr;
639 vlib_worker_thread_barrier_sync (vm);
640 vui->vrings[msg.state.index].desc = desc;
641 vui->vrings[msg.state.index].used = used;
642 vui->vrings[msg.state.index].avail = avail;
644 vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
645 vui->vrings[msg.state.index].log_used =
646 (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
648 /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
649 the ring is initialized in an enabled state. */
650 if (!(vui->features & VIRTIO_FEATURE (VHOST_USER_F_PROTOCOL_FEATURES)))
651 vui->vrings[msg.state.index].enabled = 1;
653 vui->vrings[msg.state.index].last_used_idx =
654 vui->vrings[msg.state.index].last_avail_idx =
655 vui->vrings[msg.state.index].used->idx;
657 /* tell driver that we don't want interrupts */
658 if (vhost_user_is_packed_ring_supported (vui))
659 vui->vrings[msg.state.index].used_event->flags =
660 VRING_EVENT_F_DISABLE;
662 vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
663 vlib_worker_thread_barrier_release (vm);
664 vhost_user_update_iface_state (vui);
667 case VHOST_USER_SET_OWNER:
668 vu_log_debug (vui, "if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
671 case VHOST_USER_RESET_OWNER:
672 vu_log_debug (vui, "if %d msg VHOST_USER_RESET_OWNER",
676 case VHOST_USER_SET_VRING_CALL:
677 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_CALL %d",
678 vui->hw_if_index, msg.u64);
680 q = (u8) (msg.u64 & 0xFF);
682 /* if there is old fd, delete and close it */
683 if (vui->vrings[q].callfd_idx != ~0)
685 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
686 vui->vrings[q].callfd_idx);
687 clib_file_del (&file_main, uf);
688 vui->vrings[q].callfd_idx = ~0;
691 if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
693 if (number_of_fds != 1)
695 vu_log_debug (vui, "More than one fd received !");
699 template.read_function = vhost_user_callfd_read_ready;
700 template.file_descriptor = fds[0];
701 template.private_data =
702 ((vui - vhost_user_main.vhost_user_interfaces) << 8) + q;
703 vui->vrings[q].callfd_idx = clib_file_add (&file_main, &template);
706 vui->vrings[q].callfd_idx = ~0;
709 case VHOST_USER_SET_VRING_KICK:
710 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_KICK %d",
711 vui->hw_if_index, msg.u64);
713 q = (u8) (msg.u64 & 0xFF);
715 if (vui->vrings[q].kickfd_idx != ~0)
717 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
718 vui->vrings[q].kickfd_idx);
719 clib_file_del (&file_main, uf);
720 vui->vrings[q].kickfd_idx = ~0;
723 if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
725 if (number_of_fds != 1)
727 vu_log_debug (vui, "More than one fd received !");
731 template.read_function = vhost_user_kickfd_read_ready;
732 template.file_descriptor = fds[0];
733 template.private_data =
734 (((uword) (vui - vhost_user_main.vhost_user_interfaces)) << 8) +
736 vui->vrings[q].kickfd_idx = clib_file_add (&file_main, &template);
740 //When no kickfd is set, the queue is initialized as started
741 vui->vrings[q].kickfd_idx = ~0;
742 vui->vrings[q].started = 1;
743 vhost_user_thread_placement (vui, q);
745 vhost_user_update_iface_state (vui);
748 case VHOST_USER_SET_VRING_ERR:
749 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_ERR %d",
750 vui->hw_if_index, msg.u64);
752 q = (u8) (msg.u64 & 0xFF);
754 if (vui->vrings[q].errfd != -1)
755 close (vui->vrings[q].errfd);
757 if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
759 if (number_of_fds != 1)
762 vui->vrings[q].errfd = fds[0];
765 vui->vrings[q].errfd = -1;
768 case VHOST_USER_SET_VRING_BASE:
770 "if %d msg VHOST_USER_SET_VRING_BASE idx %d num 0x%x",
771 vui->hw_if_index, msg.state.index, msg.state.num);
772 vlib_worker_thread_barrier_sync (vm);
773 vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
774 if (vhost_user_is_packed_ring_supported (vui))
778 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
779 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
780 * | last avail idx | | last used idx | |
781 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
784 * avail wrap counter used wrap counter
786 /* last avail idx at bit 0-14. */
787 vui->vrings[msg.state.index].last_avail_idx =
788 msg.state.num & 0x7fff;
789 /* avail wrap counter at bit 15 */
790 vui->vrings[msg.state.index].avail_wrap_counter =
791 ! !(msg.state.num & (1 << 15));
794 * Although last_used_idx is passed in the upper 16 bits in qemu
795 * implementation, in practice, last_avail_idx and last_used_idx are
796 * usually the same. As a result, DPDK does not bother to pass us
797 * last_used_idx. The spec is not clear on thex coding. I figured it
798 * out by reading the qemu code. So let's just read last_avail_idx
799 * and set last_used_idx equals to last_avail_idx.
801 vui->vrings[msg.state.index].last_used_idx =
802 vui->vrings[msg.state.index].last_avail_idx;
803 vui->vrings[msg.state.index].used_wrap_counter =
804 vui->vrings[msg.state.index].avail_wrap_counter;
806 if (vui->vrings[msg.state.index].avail_wrap_counter == 1)
807 vui->vrings[msg.state.index].avail_wrap_counter =
810 vlib_worker_thread_barrier_release (vm);
813 case VHOST_USER_GET_VRING_BASE:
814 if (msg.state.index >= VHOST_VRING_MAX_N)
816 vu_log_debug (vui, "invalid vring index VHOST_USER_GET_VRING_BASE:"
817 " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
821 /* protection is needed to prevent rx/tx from changing last_avail_idx */
822 vlib_worker_thread_barrier_sync (vm);
824 * Copy last_avail_idx from the vring before closing it because
825 * closing the vring also initializes the vring last_avail_idx
827 msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
828 if (vhost_user_is_packed_ring_supported (vui))
831 (vui->vrings[msg.state.index].last_avail_idx & 0x7fff) |
832 (! !vui->vrings[msg.state.index].avail_wrap_counter << 15);
834 ((vui->vrings[msg.state.index].last_used_idx & 0x7fff) |
835 (! !vui->vrings[msg.state.index].used_wrap_counter << 15)) << 16;
838 msg.size = sizeof (msg.state);
841 * Spec says: Client must [...] stop ring upon receiving
842 * VHOST_USER_GET_VRING_BASE
844 vhost_user_vring_close (vui, msg.state.index);
845 vlib_worker_thread_barrier_release (vm);
847 "if %d msg VHOST_USER_GET_VRING_BASE idx %d num 0x%x",
848 vui->hw_if_index, msg.state.index, msg.state.num);
850 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
851 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
853 vu_log_debug (vui, "could not send message response");
856 vhost_user_update_iface_state (vui);
859 case VHOST_USER_NONE:
860 vu_log_debug (vui, "if %d msg VHOST_USER_NONE", vui->hw_if_index);
863 case VHOST_USER_SET_LOG_BASE:
864 vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_BASE",
867 if (msg.size != sizeof (msg.log))
869 vu_log_debug (vui, "invalid msg size for VHOST_USER_SET_LOG_BASE:"
870 " %d instead of %d", msg.size, sizeof (msg.log));
874 if (!(vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
876 vu_log_debug (vui, "VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but "
877 "VHOST_USER_SET_LOG_BASE received");
882 /* align size to page */
883 long page_sz = get_huge_page_size (fd);
885 (msg.log.size + msg.log.offset + page_sz - 1) & ~(page_sz - 1);
887 void *log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
890 vu_log_debug (vui, "map log region addr 0 len 0x%lx off 0x%lx fd %d "
891 "mapped 0x%lx", map_sz, msg.log.offset, fd,
894 if (log_base_addr == MAP_FAILED)
896 vu_log_err (vui, "failed to map memory. errno is %d", errno);
900 vlib_worker_thread_barrier_sync (vm);
901 vui->log_base_addr = log_base_addr;
902 vui->log_base_addr += msg.log.offset;
903 vui->log_size = msg.log.size;
904 vlib_worker_thread_barrier_release (vm);
907 msg.size = sizeof (msg.u64);
909 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
910 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
912 vu_log_debug (vui, "could not send message response");
917 case VHOST_USER_SET_LOG_FD:
918 vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
921 case VHOST_USER_GET_PROTOCOL_FEATURES:
923 msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |
924 (1 << VHOST_USER_PROTOCOL_F_MQ);
925 msg.size = sizeof (msg.u64);
926 vu_log_debug (vui, "if %d msg VHOST_USER_GET_PROTOCOL_FEATURES - "
927 "reply 0x%016llx", vui->hw_if_index, msg.u64);
929 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
930 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
932 vu_log_debug (vui, "could not send message response");
937 case VHOST_USER_SET_PROTOCOL_FEATURES:
938 vu_log_debug (vui, "if %d msg VHOST_USER_SET_PROTOCOL_FEATURES "
939 "features 0x%016llx", vui->hw_if_index, msg.u64);
940 vui->protocol_features = msg.u64;
943 case VHOST_USER_GET_QUEUE_NUM:
945 msg.u64 = VHOST_VRING_MAX_N;
946 msg.size = sizeof (msg.u64);
947 vu_log_debug (vui, "if %d msg VHOST_USER_GET_QUEUE_NUM - reply %d",
948 vui->hw_if_index, msg.u64);
950 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
951 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
953 vu_log_debug (vui, "could not send message response");
958 case VHOST_USER_SET_VRING_ENABLE:
959 vu_log_debug (vui, "if %d VHOST_USER_SET_VRING_ENABLE: %s queue %d",
960 vui->hw_if_index, msg.state.num ? "enable" : "disable",
962 if (msg.state.index >= VHOST_VRING_MAX_N)
964 vu_log_debug (vui, "invalid vring idx VHOST_USER_SET_VRING_ENABLE:"
965 " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
969 vui->vrings[msg.state.index].enabled = msg.state.num;
970 vhost_user_thread_placement (vui, msg.state.index);
971 vhost_user_update_iface_state (vui);
975 vu_log_debug (vui, "unknown vhost-user message %d received. "
976 "closing socket", msg.request);
983 vlib_worker_thread_barrier_sync (vm);
984 vhost_user_if_disconnect (vui);
985 vlib_worker_thread_barrier_release (vm);
986 vhost_user_update_iface_state (vui);
990 static clib_error_t *
991 vhost_user_socket_error (clib_file_t * uf)
993 vlib_main_t *vm = vlib_get_main ();
994 vhost_user_main_t *vum = &vhost_user_main;
995 vhost_user_intf_t *vui =
996 pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
998 vu_log_debug (vui, "socket error on if %d", vui->sw_if_index);
999 vlib_worker_thread_barrier_sync (vm);
1000 vhost_user_if_disconnect (vui);
1001 vlib_worker_thread_barrier_release (vm);
1005 static clib_error_t *
1006 vhost_user_socksvr_accept_ready (clib_file_t * uf)
1008 int client_fd, client_len;
1009 struct sockaddr_un client;
1010 clib_file_t template = { 0 };
1011 vhost_user_main_t *vum = &vhost_user_main;
1012 vhost_user_intf_t *vui;
1014 vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
1016 client_len = sizeof (client);
1017 client_fd = accept (uf->file_descriptor,
1018 (struct sockaddr *) &client,
1019 (socklen_t *) & client_len);
1022 return clib_error_return_unix (0, "accept");
1024 if (vui->clib_file_index != ~0)
1026 vu_log_debug (vui, "Close client socket for vhost interface %d, fd %d",
1027 vui->sw_if_index, UNIX_GET_FD (vui->clib_file_index));
1028 clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
1031 vu_log_debug (vui, "New client socket for vhost interface %d, fd %d",
1032 vui->sw_if_index, client_fd);
1033 template.read_function = vhost_user_socket_read;
1034 template.error_function = vhost_user_socket_error;
1035 template.file_descriptor = client_fd;
1036 template.private_data = vui - vhost_user_main.vhost_user_interfaces;
1037 vui->clib_file_index = clib_file_add (&file_main, &template);
1041 static clib_error_t *
1042 vhost_user_init (vlib_main_t * vm)
1044 vhost_user_main_t *vum = &vhost_user_main;
1045 vlib_thread_main_t *tm = vlib_get_thread_main ();
1047 vum->log_default = vlib_log_register_class ("vhost-user", 0);
1049 vum->coalesce_frames = 32;
1050 vum->coalesce_time = 1e-3;
1052 vec_validate (vum->cpus, tm->n_vlib_mains - 1);
1055 vec_foreach (cpu, vum->cpus)
1057 /* This is actually not necessary as validate already zeroes it
1058 * Just keeping the loop here for later because I am lazy. */
1059 cpu->rx_buffers_len = 0;
1062 vum->random = random_default_seed ();
1064 mhash_init_c_string (&vum->if_index_by_sock_name, sizeof (uword));
1070 VLIB_INIT_FUNCTION (vhost_user_init) =
1072 .runs_after = VLIB_INITS("ip4_init"),
1077 vhost_user_send_interrupt_process (vlib_main_t * vm,
1078 vlib_node_runtime_t * rt, vlib_frame_t * f)
1080 vhost_user_intf_t *vui;
1081 f64 timeout = 3153600000.0 /* 100 years */ ;
1082 uword event_type, *event_data = 0;
1083 vhost_user_main_t *vum = &vhost_user_main;
1085 f64 now, poll_time_remaining;
1091 poll_time_remaining =
1092 vlib_process_wait_for_event_or_clock (vm, timeout);
1093 event_type = vlib_process_get_events (vm, &event_data);
1094 vec_reset_length (event_data);
1097 * Use the remaining timeout if it is less than coalesce time to avoid
1098 * resetting the existing timer in the middle of expiration
1100 timeout = poll_time_remaining;
1101 if (vlib_process_suspend_time_is_zero (timeout) ||
1102 (timeout > vum->coalesce_time))
1103 timeout = vum->coalesce_time;
1105 now = vlib_time_now (vm);
1108 case VHOST_USER_EVENT_STOP_TIMER:
1112 case VHOST_USER_EVENT_START_TIMER:
1114 if (!vlib_process_suspend_time_is_zero (poll_time_remaining))
1120 pool_foreach (vui, vum->vhost_user_interfaces, {
1121 next_timeout = timeout;
1122 for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid += 2)
1124 vhost_user_vring_t *rxvq = &vui->vrings[qid];
1125 vhost_user_vring_t *txvq = &vui->vrings[qid + 1];
1127 if (txvq->qid == -1)
1129 if (txvq->n_since_last_int)
1131 if (now >= txvq->int_deadline)
1132 vhost_user_send_call (vm, txvq);
1134 next_timeout = txvq->int_deadline - now;
1137 if (rxvq->n_since_last_int)
1139 if (now >= rxvq->int_deadline)
1140 vhost_user_send_call (vm, rxvq);
1142 next_timeout = rxvq->int_deadline - now;
1145 if ((next_timeout < timeout) && (next_timeout > 0.0))
1146 timeout = next_timeout;
1153 clib_warning ("BUG: unhandled event type %d", event_type);
1156 /* No less than 1 millisecond */
1160 timeout = 3153600000.0;
1166 VLIB_REGISTER_NODE (vhost_user_send_interrupt_node) = {
1167 .function = vhost_user_send_interrupt_process,
1168 .type = VLIB_NODE_TYPE_PROCESS,
1169 .name = "vhost-user-send-interrupt-process",
1174 vhost_user_process (vlib_main_t * vm,
1175 vlib_node_runtime_t * rt, vlib_frame_t * f)
1177 vhost_user_main_t *vum = &vhost_user_main;
1178 vhost_user_intf_t *vui;
1179 struct sockaddr_un sun;
1181 clib_file_t template = { 0 };
1182 f64 timeout = 3153600000.0 /* 100 years */ ;
1183 uword *event_data = 0;
1186 sun.sun_family = AF_UNIX;
1187 template.read_function = vhost_user_socket_read;
1188 template.error_function = vhost_user_socket_error;
1192 vlib_process_wait_for_event_or_clock (vm, timeout);
1193 vlib_process_get_events (vm, &event_data);
1194 vec_reset_length (event_data);
1199 pool_foreach (vui, vum->vhost_user_interfaces, {
1201 if (vui->unix_server_index == ~0) { //Nothing to do for server sockets
1202 if (vui->clib_file_index == ~0)
1205 ((sockfd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0))
1208 * 1st time error or new error for this interface,
1209 * spit out the message and record the error
1211 if (!vui->sock_errno || (vui->sock_errno != errno))
1214 ("Error: Could not open unix socket for %s",
1215 vui->sock_filename);
1216 vui->sock_errno = errno;
1221 /* try to connect */
1222 strncpy (sun.sun_path, (char *) vui->sock_filename,
1223 sizeof (sun.sun_path) - 1);
1225 /* Avoid hanging VPP if the other end does not accept */
1226 if (fcntl(sockfd, F_SETFL, O_NONBLOCK) < 0)
1227 clib_unix_warning ("fcntl");
1229 if (connect (sockfd, (struct sockaddr *) &sun,
1230 sizeof (struct sockaddr_un)) == 0)
1232 /* Set the socket to blocking as it was before */
1233 if (fcntl(sockfd, F_SETFL, 0) < 0)
1234 clib_unix_warning ("fcntl2");
1236 vui->sock_errno = 0;
1237 template.file_descriptor = sockfd;
1238 template.private_data =
1239 vui - vhost_user_main.vhost_user_interfaces;
1240 vui->clib_file_index = clib_file_add (&file_main, &template);
1242 /* This sockfd is considered consumed */
1247 vui->sock_errno = errno;
1252 /* check if socket is alive */
1254 socklen_t len = sizeof (error);
1255 int fd = UNIX_GET_FD(vui->clib_file_index);
1257 getsockopt (fd, SOL_SOCKET, SO_ERROR, &error, &len);
1261 vu_log_debug (vui, "getsockopt returned %d", retval);
1262 vhost_user_if_disconnect (vui);
1273 VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
1274 .function = vhost_user_process,
1275 .type = VLIB_NODE_TYPE_PROCESS,
1276 .name = "vhost-user-process",
1281 * Disables and reset interface structure.
1282 * It can then be either init again, or removed from used interfaces.
1285 vhost_user_term_if (vhost_user_intf_t * vui)
1288 vhost_user_main_t *vum = &vhost_user_main;
1290 // disconnect interface sockets
1291 vhost_user_if_disconnect (vui);
1292 vhost_user_update_gso_interface_count (vui, 0 /* delete */ );
1293 vhost_user_update_iface_state (vui);
1295 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1297 // Remove existing queue mapping for the interface
1301 vnet_main_t *vnm = vnet_get_main ();
1302 vhost_user_vring_t *txvq = &vui->vrings[q];
1304 if (txvq->qid != -1)
1306 rv = vnet_hw_interface_unassign_rx_thread (vnm,
1310 vu_log_warn (vui, "unable to unassign interface %d, "
1311 "queue %d: rc=%d", vui->hw_if_index, q >> 1, rv);
1315 clib_mem_free ((void *) vui->vring_locks[q]);
1318 if (vui->unix_server_index != ~0)
1320 //Close server socket
1321 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
1322 vui->unix_server_index);
1323 clib_file_del (&file_main, uf);
1324 vui->unix_server_index = ~0;
1325 unlink (vui->sock_filename);
1328 mhash_unset (&vum->if_index_by_sock_name, vui->sock_filename,
1333 vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
1335 vhost_user_main_t *vum = &vhost_user_main;
1336 vhost_user_intf_t *vui;
1338 vnet_hw_interface_t *hwif;
1343 vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index))
1344 || hwif->dev_class_index != vhost_user_device_class.index)
1345 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1347 vui = pool_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
1349 vu_log_debug (vui, "Deleting vhost-user interface %s (instance %d)",
1350 hwif->name, hwif->dev_instance);
1352 for (qid = 1; qid < VHOST_VRING_MAX_N / 2; qid += 2)
1354 vhost_user_vring_t *txvq = &vui->vrings[qid];
1356 if (txvq->qid == -1)
1358 if ((vum->ifq_count > 0) &&
1359 ((txvq->mode == VNET_HW_IF_RX_MODE_INTERRUPT) ||
1360 (txvq->mode == VNET_HW_IF_RX_MODE_ADAPTIVE)))
1363 // Stop the timer if there is no more interrupt interface/queue
1364 if ((vum->ifq_count == 0) &&
1365 (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
1367 vlib_process_signal_event (vm,
1368 vhost_user_send_interrupt_node.index,
1369 VHOST_USER_EVENT_STOP_TIMER, 0);
1375 // Disable and reset interface
1376 vhost_user_term_if (vui);
1378 // Reset renumbered iface
1379 if (hwif->dev_instance <
1380 vec_len (vum->show_dev_instance_by_real_dev_instance))
1381 vum->show_dev_instance_by_real_dev_instance[hwif->dev_instance] = ~0;
1383 // Delete ethernet interface
1384 ethernet_delete_interface (vnm, vui->hw_if_index);
1387 pool_put (vum->vhost_user_interfaces, vui);
1392 static clib_error_t *
1393 vhost_user_exit (vlib_main_t * vm)
1395 vnet_main_t *vnm = vnet_get_main ();
1396 vhost_user_main_t *vum = &vhost_user_main;
1397 vhost_user_intf_t *vui;
1399 vlib_worker_thread_barrier_sync (vlib_get_main ());
1401 pool_foreach (vui, vum->vhost_user_interfaces, {
1402 vhost_user_delete_if (vnm, vm, vui->sw_if_index);
1405 vlib_worker_thread_barrier_release (vlib_get_main ());
1409 VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
1412 * Open server unix socket on specified sock_filename.
1415 vhost_user_init_server_sock (const char *sock_filename, int *sock_fd)
1418 struct sockaddr_un un = { };
1420 /* create listening socket */
1421 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
1422 return VNET_API_ERROR_SYSCALL_ERROR_1;
1424 un.sun_family = AF_UNIX;
1425 strncpy ((char *) un.sun_path, (char *) sock_filename,
1426 sizeof (un.sun_path) - 1);
1428 /* remove if exists */
1429 unlink ((char *) sock_filename);
1431 if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
1433 rv = VNET_API_ERROR_SYSCALL_ERROR_2;
1437 if (listen (fd, 1) == -1)
1439 rv = VNET_API_ERROR_SYSCALL_ERROR_3;
1452 * Create ethernet interface for vhost user interface.
1455 vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
1456 vhost_user_intf_t * vui, u8 * hwaddress)
1458 vhost_user_main_t *vum = &vhost_user_main;
1460 clib_error_t *error;
1462 /* create hw and sw interface */
1465 clib_memcpy (hwaddr, hwaddress, 6);
1469 random_u32 (&vum->random);
1470 clib_memcpy (hwaddr + 2, &vum->random, sizeof (vum->random));
1475 error = ethernet_register_interface
1477 vhost_user_device_class.index,
1478 vui - vum->vhost_user_interfaces /* device instance */ ,
1479 hwaddr /* ethernet address */ ,
1480 &vui->hw_if_index, 0 /* flag change */ );
1483 clib_error_report (error);
1487 * Initialize vui with specified attributes
1490 vhost_user_vui_init (vnet_main_t * vnm,
1491 vhost_user_intf_t * vui,
1493 const char *sock_filename,
1494 u64 feature_mask, u32 * sw_if_index, u8 enable_gso,
1497 vnet_sw_interface_t *sw;
1499 vhost_user_main_t *vum = &vhost_user_main;
1500 vnet_hw_interface_t *hw;
1502 hw = vnet_get_hw_interface (vnm, vui->hw_if_index);
1503 sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
1504 if (server_sock_fd != -1)
1506 clib_file_t template = { 0 };
1507 template.read_function = vhost_user_socksvr_accept_ready;
1508 template.file_descriptor = server_sock_fd;
1509 template.private_data = vui - vum->vhost_user_interfaces; //hw index
1510 vui->unix_server_index = clib_file_add (&file_main, &template);
1514 vui->unix_server_index = ~0;
1517 vui->sw_if_index = sw->sw_if_index;
1518 strncpy (vui->sock_filename, sock_filename,
1519 ARRAY_LEN (vui->sock_filename) - 1);
1520 vui->sock_errno = 0;
1522 vui->feature_mask = feature_mask;
1523 vui->clib_file_index = ~0;
1524 vui->log_base_addr = 0;
1525 vui->if_index = vui - vum->vhost_user_interfaces;
1526 vui->enable_gso = enable_gso;
1527 vui->enable_packed = enable_packed;
1529 * enable_gso takes precedence over configurable feature mask if there
1531 * if feature mask disables gso, but enable_gso is configured,
1532 * then gso is enable
1533 * if feature mask enables gso, but enable_gso is not configured,
1534 * then gso is enable
1536 * if gso is enable via feature mask, it must enable both host and guest
1537 * gso feature mask, we don't support one sided GSO or partial GSO.
1539 if ((vui->enable_gso == 0) &&
1540 ((feature_mask & FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS) ==
1541 (FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS)))
1542 vui->enable_gso = 1;
1543 vhost_user_update_gso_interface_count (vui, 1 /* add */ );
1544 mhash_set_mem (&vum->if_index_by_sock_name, vui->sock_filename,
1547 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1548 vhost_user_vring_init (vui, q);
1550 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
1551 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
1554 *sw_if_index = vui->sw_if_index;
1556 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1558 vui->vring_locks[q] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1559 CLIB_CACHE_LINE_BYTES);
1560 clib_memset ((void *) vui->vring_locks[q], 0, CLIB_CACHE_LINE_BYTES);
1563 vec_validate (vui->per_cpu_tx_qid,
1564 vlib_get_thread_main ()->n_vlib_mains - 1);
1565 vhost_user_tx_thread_placement (vui);
1569 vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
1570 const char *sock_filename,
1574 u8 renumber, u32 custom_dev_instance, u8 * hwaddr,
1575 u8 enable_gso, u8 enable_packed)
1577 vhost_user_intf_t *vui = NULL;
1580 int server_sock_fd = -1;
1581 vhost_user_main_t *vum = &vhost_user_main;
1584 if (sock_filename == NULL || !(strlen (sock_filename) > 0))
1586 return VNET_API_ERROR_INVALID_ARGUMENT;
1589 if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
1594 vui = &vum->vhost_user_interfaces[*if_index];
1595 *sw_if_index = vui->sw_if_index;
1597 return VNET_API_ERROR_IF_ALREADY_EXISTS;
1603 vhost_user_init_server_sock (sock_filename, &server_sock_fd)) != 0)
1609 /* Protect the uninitialized vui from being dispatched by rx/tx */
1610 vlib_worker_thread_barrier_sync (vm);
1611 pool_get (vhost_user_main.vhost_user_interfaces, vui);
1612 vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
1613 vlib_worker_thread_barrier_release (vm);
1615 vhost_user_vui_init (vnm, vui, server_sock_fd, sock_filename,
1616 feature_mask, &sw_if_idx, enable_gso, enable_packed);
1617 vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000);
1618 vhost_user_rx_thread_placement (vui, 1);
1621 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1624 *sw_if_index = sw_if_idx;
1626 // Process node must connect
1627 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1633 vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
1634 const char *sock_filename,
1637 u64 feature_mask, u8 renumber, u32 custom_dev_instance,
1638 u8 enable_gso, u8 enable_packed)
1640 vhost_user_main_t *vum = &vhost_user_main;
1641 vhost_user_intf_t *vui = NULL;
1643 int server_sock_fd = -1;
1645 vnet_hw_interface_t *hwif;
1650 vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index))
1651 || hwif->dev_class_index != vhost_user_device_class.index)
1652 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1654 if (sock_filename == NULL || !(strlen (sock_filename) > 0))
1655 return VNET_API_ERROR_INVALID_ARGUMENT;
1657 vui = vec_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
1660 * Disallow changing the interface to have the same path name
1661 * as other interface
1663 if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
1664 if (if_index && (*if_index != vui->if_index))
1665 return VNET_API_ERROR_IF_ALREADY_EXISTS;
1667 // First try to open server socket
1669 if ((rv = vhost_user_init_server_sock (sock_filename,
1670 &server_sock_fd)) != 0)
1673 vhost_user_term_if (vui);
1674 vhost_user_vui_init (vnm, vui, server_sock_fd,
1675 sock_filename, feature_mask, &sw_if_idx, enable_gso,
1679 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1681 // Process node must connect
1682 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1688 vhost_user_connect_command_fn (vlib_main_t * vm,
1689 unformat_input_t * input,
1690 vlib_cli_command_t * cmd)
1692 unformat_input_t _line_input, *line_input = &_line_input;
1693 u8 *sock_filename = NULL;
1696 u64 feature_mask = (u64) ~ (0ULL);
1698 u32 custom_dev_instance = ~0;
1701 clib_error_t *error = NULL;
1702 u8 enable_gso = 0, enable_packed = 0;
1704 /* Get a line of input. */
1705 if (!unformat_user (input, unformat_line_input, line_input))
1708 /* GSO feature is disable by default */
1709 feature_mask &= ~FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
1710 /* packed-ring feature is disable by default */
1711 feature_mask &= ~VIRTIO_FEATURE (VIRTIO_F_RING_PACKED);
1712 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1714 if (unformat (line_input, "socket %s", &sock_filename))
1716 else if (unformat (line_input, "server"))
1718 else if (unformat (line_input, "gso"))
1720 else if (unformat (line_input, "packed"))
1722 else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
1726 (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
1728 else if (unformat (line_input, "renumber %d", &custom_dev_instance))
1734 error = clib_error_return (0, "unknown input `%U'",
1735 format_unformat_error, line_input);
1740 vnet_main_t *vnm = vnet_get_main ();
1743 if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
1744 is_server, &sw_if_index, feature_mask,
1745 renumber, custom_dev_instance, hw,
1746 enable_gso, enable_packed)))
1748 error = clib_error_return (0, "vhost_user_create_if returned %d", rv);
1752 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
1756 vec_free (sock_filename);
1757 unformat_free (line_input);
1763 vhost_user_delete_command_fn (vlib_main_t * vm,
1764 unformat_input_t * input,
1765 vlib_cli_command_t * cmd)
1767 unformat_input_t _line_input, *line_input = &_line_input;
1768 u32 sw_if_index = ~0;
1769 vnet_main_t *vnm = vnet_get_main ();
1770 clib_error_t *error = NULL;
1772 /* Get a line of input. */
1773 if (!unformat_user (input, unformat_line_input, line_input))
1776 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1778 if (unformat (line_input, "sw_if_index %d", &sw_if_index))
1781 (line_input, "%U", unformat_vnet_sw_interface, vnm,
1784 vnet_hw_interface_t *hwif =
1785 vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
1787 vhost_user_device_class.index != hwif->dev_class_index)
1789 error = clib_error_return (0, "Not a vhost interface");
1795 error = clib_error_return (0, "unknown input `%U'",
1796 format_unformat_error, line_input);
1801 vhost_user_delete_if (vnm, vm, sw_if_index);
1804 unformat_free (line_input);
1810 vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
1811 vhost_user_intf_details_t ** out_vuids)
1814 vhost_user_main_t *vum = &vhost_user_main;
1815 vhost_user_intf_t *vui;
1816 vhost_user_intf_details_t *r_vuids = NULL;
1817 vhost_user_intf_details_t *vuid = NULL;
1818 u32 *hw_if_indices = 0;
1819 vnet_hw_interface_t *hi;
1825 pool_foreach (vui, vum->vhost_user_interfaces,
1826 vec_add1 (hw_if_indices, vui->hw_if_index);
1829 for (i = 0; i < vec_len (hw_if_indices); i++)
1831 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
1832 vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
1834 vec_add2 (r_vuids, vuid, 1);
1835 vuid->sw_if_index = vui->sw_if_index;
1836 vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
1837 vuid->features = vui->features;
1838 vuid->num_regions = vui->nregions;
1839 vuid->is_server = vui->unix_server_index != ~0;
1840 vuid->sock_errno = vui->sock_errno;
1841 snprintf ((char *) vuid->sock_filename, sizeof (vuid->sock_filename),
1842 "%s", vui->sock_filename);
1843 memcpy_s (vuid->if_name, sizeof (vuid->if_name), hi->name,
1844 clib_min (vec_len (hi->name), sizeof (vuid->if_name) - 1));
1845 vuid->if_name[sizeof (vuid->if_name) - 1] = 0;
1848 vec_free (hw_if_indices);
1850 *out_vuids = r_vuids;
1856 format_vhost_user_desc (u8 * s, va_list * args)
1858 char *fmt = va_arg (*args, char *);
1859 vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
1860 vring_desc_t *desc_table = va_arg (*args, vring_desc_t *);
1861 int idx = va_arg (*args, int);
1862 u32 *mem_hint = va_arg (*args, u32 *);
1864 s = format (s, fmt, idx, desc_table[idx].addr, desc_table[idx].len,
1865 desc_table[idx].flags, desc_table[idx].next,
1866 pointer_to_uword (map_guest_mem (vui, desc_table[idx].addr,
1872 format_vhost_user_vring (u8 * s, va_list * args)
1874 char *fmt = va_arg (*args, char *);
1875 vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
1876 int q = va_arg (*args, int);
1878 s = format (s, fmt, vui->vrings[q].avail->flags, vui->vrings[q].avail->idx,
1879 vui->vrings[q].used->flags, vui->vrings[q].used->idx);
1884 vhost_user_show_fds (vlib_main_t * vm, vhost_user_intf_t * vui, int q)
1886 int kickfd = UNIX_GET_FD (vui->vrings[q].kickfd_idx);
1887 int callfd = UNIX_GET_FD (vui->vrings[q].callfd_idx);
1889 vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n", kickfd, callfd,
1890 vui->vrings[q].errfd);
1894 vhost_user_show_desc (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
1895 int show_descr, int show_verbose)
1901 vring_desc_t *desc_table;
1903 if (vui->vrings[q].avail && vui->vrings[q].used)
1904 vlib_cli_output (vm, "%U", format_vhost_user_vring,
1905 " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
1908 vhost_user_show_fds (vm, vui, q);
1912 vlib_cli_output (vm, "\n descriptor table:\n");
1913 vlib_cli_output (vm,
1914 " slot addr len flags next "
1916 vlib_cli_output (vm,
1917 " ===== ================== ===== ====== ===== "
1918 "==================\n");
1919 for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
1921 desc_table = vui->vrings[q].desc;
1922 vlib_cli_output (vm, "%U", format_vhost_user_desc,
1923 " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n", vui,
1924 desc_table, j, &mem_hint);
1925 if (show_verbose && (desc_table[j].flags & VRING_DESC_F_INDIRECT))
1927 n_entries = desc_table[j].len / sizeof (vring_desc_t);
1928 desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
1931 for (idx = 0; idx < clib_min (20, n_entries); idx++)
1934 (vm, "%U", format_vhost_user_desc,
1935 "> %-4u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
1936 desc_table, idx, &mem_hint);
1938 if (n_entries >= 20)
1939 vlib_cli_output (vm, "Skip displaying entries 20...%u\n",
1948 format_vhost_user_packed_desc (u8 * s, va_list * args)
1950 char *fmt = va_arg (*args, char *);
1951 vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
1952 vring_packed_desc_t *desc_table = va_arg (*args, vring_packed_desc_t *);
1953 int idx = va_arg (*args, int);
1954 u32 *mem_hint = va_arg (*args, u32 *);
1956 s = format (s, fmt, idx, desc_table[idx].addr, desc_table[idx].len,
1957 desc_table[idx].flags, desc_table[idx].id,
1958 pointer_to_uword (map_guest_mem (vui, desc_table[idx].addr,
1964 format_vhost_user_vring_packed (u8 * s, va_list * args)
1966 char *fmt = va_arg (*args, char *);
1967 vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
1968 int q = va_arg (*args, int);
1970 s = format (s, fmt, vui->vrings[q].avail_event->flags,
1971 vui->vrings[q].avail_event->off_wrap,
1972 vui->vrings[q].used_event->flags,
1973 vui->vrings[q].used_event->off_wrap,
1974 vui->vrings[q].avail_wrap_counter,
1975 vui->vrings[q].used_wrap_counter);
1980 vhost_user_show_desc_packed (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
1981 int show_descr, int show_verbose)
1987 vring_packed_desc_t *desc_table;
1989 if (vui->vrings[q].avail_event && vui->vrings[q].used_event)
1990 vlib_cli_output (vm, "%U", format_vhost_user_vring_packed,
1991 " avail_event.flags %x avail_event.off_wrap %u "
1992 "used_event.flags %x used_event.off_wrap %u\n"
1993 " avail wrap counter %u, used wrap counter %u\n",
1996 vhost_user_show_fds (vm, vui, q);
2000 vlib_cli_output (vm, "\n descriptor table:\n");
2001 vlib_cli_output (vm,
2002 " slot addr len flags id "
2004 vlib_cli_output (vm,
2005 " ===== ================== ===== ====== ===== "
2006 "==================\n");
2007 for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
2009 desc_table = vui->vrings[q].packed_desc;
2010 vlib_cli_output (vm, "%U", format_vhost_user_packed_desc,
2011 " %-5u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
2012 desc_table, j, &mem_hint);
2013 if (show_verbose && (desc_table[j].flags & VRING_DESC_F_INDIRECT))
2015 n_entries = desc_table[j].len >> 4;
2016 desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
2019 for (idx = 0; idx < clib_min (20, n_entries); idx++)
2022 (vm, "%U", format_vhost_user_packed_desc,
2023 "> %-4u 0x%016lx %-5u 0x%04x %-5u 0x%016lx\n", vui,
2024 desc_table, idx, &mem_hint);
2026 if (n_entries >= 20)
2027 vlib_cli_output (vm, "Skip displaying entries 20...%u\n",
2036 show_vhost_user_command_fn (vlib_main_t * vm,
2037 unformat_input_t * input,
2038 vlib_cli_command_t * cmd)
2040 clib_error_t *error = 0;
2041 vnet_main_t *vnm = vnet_get_main ();
2042 vhost_user_main_t *vum = &vhost_user_main;
2043 vhost_user_intf_t *vui;
2044 u32 hw_if_index, *hw_if_indices = 0;
2045 vnet_hw_interface_t *hi;
2050 int show_verbose = 0;
2056 struct feat_struct *feat_entry;
2058 static struct feat_struct feat_array[] = {
2059 #define _(s,b) { .str = #s, .bit = b, },
2060 foreach_virtio_net_features
2065 #define foreach_protocol_feature \
2066 _(VHOST_USER_PROTOCOL_F_MQ) \
2067 _(VHOST_USER_PROTOCOL_F_LOG_SHMFD)
2069 static struct feat_struct proto_feat_array[] = {
2070 #define _(s) { .str = #s, .bit = s},
2071 foreach_protocol_feature
2076 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2079 (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
2081 hi = vnet_get_hw_interface (vnm, hw_if_index);
2082 if (vhost_user_device_class.index != hi->dev_class_index)
2084 error = clib_error_return (0, "unknown input `%U'",
2085 format_unformat_error, input);
2088 vec_add1 (hw_if_indices, hw_if_index);
2090 else if (unformat (input, "descriptors") || unformat (input, "desc"))
2092 else if (unformat (input, "verbose"))
2096 error = clib_error_return (0, "unknown input `%U'",
2097 format_unformat_error, input);
2101 if (vec_len (hw_if_indices) == 0)
2103 pool_foreach (vui, vum->vhost_user_interfaces,
2104 vec_add1 (hw_if_indices, vui->hw_if_index);
2107 vlib_cli_output (vm, "Virtio vhost-user interfaces");
2108 vlib_cli_output (vm, "Global:\n coalesce frames %d time %e",
2109 vum->coalesce_frames, vum->coalesce_time);
2110 vlib_cli_output (vm, " Number of rx virtqueues in interrupt mode: %d",
2112 vlib_cli_output (vm, " Number of GSO interfaces: %d", vum->gso_count);
2114 for (i = 0; i < vec_len (hw_if_indices); i++)
2116 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
2117 vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
2118 vlib_cli_output (vm, "Interface: %U (ifindex %d)",
2119 format_vnet_hw_if_index_name, vnm, hw_if_indices[i],
2121 if (vui->enable_gso)
2122 vlib_cli_output (vm, " GSO enable");
2123 if (vui->enable_packed)
2124 vlib_cli_output (vm, " Packed ring enable");
2126 vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
2127 " features mask (0x%llx): \n"
2128 " features (0x%llx): \n",
2129 vui->virtio_net_hdr_sz, vui->feature_mask,
2132 feat_entry = (struct feat_struct *) &feat_array;
2133 while (feat_entry->str)
2135 if (vui->features & (1ULL << feat_entry->bit))
2136 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
2141 vlib_cli_output (vm, " protocol features (0x%llx)",
2142 vui->protocol_features);
2143 feat_entry = (struct feat_struct *) &proto_feat_array;
2144 while (feat_entry->str)
2146 if (vui->protocol_features & (1ULL << feat_entry->bit))
2147 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
2152 vlib_cli_output (vm, "\n");
2154 vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
2156 (vui->unix_server_index != ~0) ? "server" : "client",
2157 strerror (vui->sock_errno));
2159 vlib_cli_output (vm, " rx placement: ");
2161 for (qid = 1; qid < VHOST_VRING_MAX_N / 2; qid += 2)
2163 vnet_main_t *vnm = vnet_get_main ();
2165 vnet_hw_if_rx_mode mode;
2166 vhost_user_vring_t *txvq = &vui->vrings[qid];
2168 if (txvq->qid == -1)
2171 vnet_get_device_input_thread_index (vnm, vui->hw_if_index,
2173 vnet_hw_interface_get_rx_mode (vnm, vui->hw_if_index, qid >> 1,
2175 vlib_cli_output (vm, " thread %d on vring %d, %U\n",
2177 format_vnet_hw_if_rx_mode, mode);
2180 vlib_cli_output (vm, " tx placement: %s\n",
2181 vui->use_tx_spinlock ? "spin-lock" : "lock-free");
2183 vec_foreach_index (ci, vui->per_cpu_tx_qid)
2185 vlib_cli_output (vm, " thread %d on vring %d\n", ci,
2186 VHOST_VRING_IDX_RX (vui->per_cpu_tx_qid[ci]));
2189 vlib_cli_output (vm, "\n");
2191 vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
2195 vlib_cli_output (vm,
2196 " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
2197 vlib_cli_output (vm,
2198 " ====== ===== ================== ================== ================== ================== ==================\n");
2200 for (j = 0; j < vui->nregions; j++)
2202 vlib_cli_output (vm,
2203 " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
2204 j, vui->region_mmap_fd[j],
2205 vui->regions[j].guest_phys_addr,
2206 vui->regions[j].memory_size,
2207 vui->regions[j].userspace_addr,
2208 vui->regions[j].mmap_offset,
2209 pointer_to_uword (vui->region_mmap_addr[j]));
2211 for (q = 0; q < VHOST_VRING_MAX_N; q++)
2213 if (!vui->vrings[q].started)
2216 vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
2217 (q & 1) ? "RX" : "TX",
2218 vui->vrings[q].enabled ? "" : " disabled");
2220 vlib_cli_output (vm,
2221 " qsz %d last_avail_idx %d last_used_idx %d\n",
2222 vui->vrings[q].qsz_mask + 1,
2223 vui->vrings[q].last_avail_idx,
2224 vui->vrings[q].last_used_idx);
2226 if (vhost_user_is_packed_ring_supported (vui))
2227 vhost_user_show_desc_packed (vm, vui, q, show_descr,
2230 vhost_user_show_desc (vm, vui, q, show_descr, show_verbose);
2232 vlib_cli_output (vm, "\n");
2235 vec_free (hw_if_indices);
2244 * Create a vHost User interface. Once created, a new virtual interface
2245 * will exist with the name '<em>VirtualEthernet0/0/x</em>', where '<em>x</em>'
2246 * is the next free index.
2248 * There are several parameters associated with a vHost interface:
2250 * - <b>socket <socket-filename></b> - Name of the linux socket used by hypervisor
2251 * and VPP to manage the vHost interface. If in '<em>server</em>' mode, VPP will
2252 * create the socket if it does not already exist. If in '<em>client</em>' mode,
2253 * hypervisor will create the socket if it does not already exist. The VPP code
2254 * is indifferent to the file location. However, if SELinux is enabled, then the
2255 * socket needs to be created in '<em>/var/run/vpp/</em>'.
2257 * - <b>server</b> - Optional flag to indicate that VPP should be the server for
2258 * the linux socket. If not provided, VPP will be the client. In '<em>server</em>'
2259 * mode, the VM can be reset without tearing down the vHost Interface. In
2260 * '<em>client</em>' mode, VPP can be reset without bringing down the VM and
2261 * tearing down the vHost Interface.
2263 * - <b>feature-mask <hex></b> - Optional virtio/vhost feature set negotiated at
2264 * startup. <b>This is intended for degugging only.</b> It is recommended that this
2265 * parameter not be used except by experienced users. By default, all supported
2266 * features will be advertised. Otherwise, provide the set of features desired.
2267 * - 0x000008000 (15) - VIRTIO_NET_F_MRG_RXBUF
2268 * - 0x000020000 (17) - VIRTIO_NET_F_CTRL_VQ
2269 * - 0x000200000 (21) - VIRTIO_NET_F_GUEST_ANNOUNCE
2270 * - 0x000400000 (22) - VIRTIO_NET_F_MQ
2271 * - 0x004000000 (26) - VHOST_F_LOG_ALL
2272 * - 0x008000000 (27) - VIRTIO_F_ANY_LAYOUT
2273 * - 0x010000000 (28) - VIRTIO_F_INDIRECT_DESC
2274 * - 0x040000000 (30) - VHOST_USER_F_PROTOCOL_FEATURES
2275 * - 0x100000000 (32) - VIRTIO_F_VERSION_1
2277 * - <b>hwaddr <mac-addr></b> - Optional ethernet address, can be in either
2278 * X:X:X:X:X:X unix or X.X.X cisco format.
2280 * - <b>renumber <dev_instance></b> - Optional parameter which allows the instance
2281 * in the name to be specified. If instance already exists, name will be used
2282 * anyway and multiple instances will have the same name. Use with caution.
2285 * Example of how to create a vhost interface with VPP as the client and all features enabled:
2286 * @cliexstart{create vhost-user socket /var/run/vpp/vhost1.sock}
2287 * VirtualEthernet0/0/0
2289 * Example of how to create a vhost interface with VPP as the server and with just
2290 * multiple queues enabled:
2291 * @cliexstart{create vhost-user socket /var/run/vpp/vhost2.sock server feature-mask 0x40400000}
2292 * VirtualEthernet0/0/1
2294 * Once the vHost interface is created, enable the interface using:
2295 * @cliexcmd{set interface state VirtualEthernet0/0/0 up}
2298 VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
2299 .path = "create vhost-user",
2300 .short_help = "create vhost-user socket <socket-filename> [server] "
2301 "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] [gso] "
2303 .function = vhost_user_connect_command_fn,
2309 * Delete a vHost User interface using the interface name or the
2310 * software interface index. Use the '<em>show interface</em>'
2311 * command to determine the software interface index. On deletion,
2312 * the linux socket will not be deleted.
2315 * Example of how to delete a vhost interface by name:
2316 * @cliexcmd{delete vhost-user VirtualEthernet0/0/1}
2317 * Example of how to delete a vhost interface by software interface index:
2318 * @cliexcmd{delete vhost-user sw_if_index 1}
2321 VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
2322 .path = "delete vhost-user",
2323 .short_help = "delete vhost-user {<interface> | sw_if_index <sw_idx>}",
2324 .function = vhost_user_delete_command_fn,
2328 * Display the attributes of a single vHost User interface (provide interface
2329 * name), multiple vHost User interfaces (provide a list of interface names seperated
2330 * by spaces) or all Vhost User interfaces (omit an interface name to display all
2331 * vHost interfaces).
2335 * Example of how to display a vhost interface:
2336 * @cliexstart{show vhost-user VirtualEthernet0/0/0}
2337 * Virtio vhost-user interfaces
2339 * coalesce frames 32 time 1e-3
2340 * Interface: VirtualEthernet0/0/0 (ifindex 1)
2341 * virtio_net_hdr_sz 12
2342 * features mask (0xffffffffffffffff):
2343 * features (0x50408000):
2344 * VIRTIO_NET_F_MRG_RXBUF (15)
2345 * VIRTIO_NET_F_MQ (22)
2346 * VIRTIO_F_INDIRECT_DESC (28)
2347 * VHOST_USER_F_PROTOCOL_FEATURES (30)
2348 * protocol features (0x3)
2349 * VHOST_USER_PROTOCOL_F_MQ (0)
2350 * VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
2352 * socket filename /var/run/vpp/vhost1.sock type client errno "Success"
2355 * thread 1 on vring 1
2356 * thread 1 on vring 5
2357 * thread 2 on vring 3
2358 * thread 2 on vring 7
2359 * tx placement: spin-lock
2360 * thread 0 on vring 0
2361 * thread 1 on vring 2
2362 * thread 2 on vring 0
2364 * Memory regions (total 2)
2365 * region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr
2366 * ====== ===== ================== ================== ================== ================== ==================
2367 * 0 60 0x0000000000000000 0x00000000000a0000 0x00002aaaaac00000 0x0000000000000000 0x00002aab2b400000
2368 * 1 61 0x00000000000c0000 0x000000003ff40000 0x00002aaaaacc0000 0x00000000000c0000 0x00002aababcc0000
2371 * qsz 256 last_avail_idx 0 last_used_idx 0
2372 * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
2373 * kickfd 62 callfd 64 errfd -1
2376 * qsz 256 last_avail_idx 0 last_used_idx 0
2377 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2378 * kickfd 65 callfd 66 errfd -1
2381 * qsz 256 last_avail_idx 0 last_used_idx 0
2382 * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
2383 * kickfd 63 callfd 70 errfd -1
2386 * qsz 256 last_avail_idx 0 last_used_idx 0
2387 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2388 * kickfd 72 callfd 74 errfd -1
2390 * Virtqueue 4 (TX disabled)
2391 * qsz 256 last_avail_idx 0 last_used_idx 0
2392 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2393 * kickfd 76 callfd 78 errfd -1
2395 * Virtqueue 5 (RX disabled)
2396 * qsz 256 last_avail_idx 0 last_used_idx 0
2397 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2398 * kickfd 80 callfd 82 errfd -1
2400 * Virtqueue 6 (TX disabled)
2401 * qsz 256 last_avail_idx 0 last_used_idx 0
2402 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2403 * kickfd 84 callfd 86 errfd -1
2405 * Virtqueue 7 (RX disabled)
2406 * qsz 256 last_avail_idx 0 last_used_idx 0
2407 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2408 * kickfd 88 callfd 90 errfd -1
2412 * The optional '<em>descriptors</em>' parameter will display the same output as
2413 * the previous example but will include the descriptor table for each queue.
2414 * The output is truncated below:
2415 * @cliexstart{show vhost-user VirtualEthernet0/0/0 descriptors}
2416 * Virtio vhost-user interfaces
2418 * coalesce frames 32 time 1e-3
2419 * Interface: VirtualEthernet0/0/0 (ifindex 1)
2420 * virtio_net_hdr_sz 12
2421 * features mask (0xffffffffffffffff):
2422 * features (0x50408000):
2423 * VIRTIO_NET_F_MRG_RXBUF (15)
2424 * VIRTIO_NET_F_MQ (22)
2427 * qsz 256 last_avail_idx 0 last_used_idx 0
2428 * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
2429 * kickfd 62 callfd 64 errfd -1
2432 * id addr len flags next user_addr
2433 * ===== ================== ===== ====== ===== ==================
2434 * 0 0x0000000010b6e974 2060 0x0002 1 0x00002aabbc76e974
2435 * 1 0x0000000010b6e034 2060 0x0002 2 0x00002aabbc76e034
2436 * 2 0x0000000010b6d6f4 2060 0x0002 3 0x00002aabbc76d6f4
2437 * 3 0x0000000010b6cdb4 2060 0x0002 4 0x00002aabbc76cdb4
2438 * 4 0x0000000010b6c474 2060 0x0002 5 0x00002aabbc76c474
2439 * 5 0x0000000010b6bb34 2060 0x0002 6 0x00002aabbc76bb34
2440 * 6 0x0000000010b6b1f4 2060 0x0002 7 0x00002aabbc76b1f4
2441 * 7 0x0000000010b6a8b4 2060 0x0002 8 0x00002aabbc76a8b4
2442 * 8 0x0000000010b69f74 2060 0x0002 9 0x00002aabbc769f74
2443 * 9 0x0000000010b69634 2060 0x0002 10 0x00002aabbc769634
2444 * 10 0x0000000010b68cf4 2060 0x0002 11 0x00002aabbc768cf4
2446 * 249 0x0000000000000000 0 0x0000 250 0x00002aab2b400000
2447 * 250 0x0000000000000000 0 0x0000 251 0x00002aab2b400000
2448 * 251 0x0000000000000000 0 0x0000 252 0x00002aab2b400000
2449 * 252 0x0000000000000000 0 0x0000 253 0x00002aab2b400000
2450 * 253 0x0000000000000000 0 0x0000 254 0x00002aab2b400000
2451 * 254 0x0000000000000000 0 0x0000 255 0x00002aab2b400000
2452 * 255 0x0000000000000000 0 0x0000 32768 0x00002aab2b400000
2455 * qsz 256 last_avail_idx 0 last_used_idx 0
2461 VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
2462 .path = "show vhost-user",
2463 .short_help = "show vhost-user [<interface> [<interface> [..]]] "
2464 "[[descriptors] [verbose]]",
2465 .function = show_vhost_user_command_fn,
2470 static clib_error_t *
2471 vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
2473 vhost_user_main_t *vum = &vhost_user_main;
2475 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2477 if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
2479 else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
2481 else if (unformat (input, "dont-dump-memory"))
2482 vum->dont_dump_vhost_user_memory = 1;
2484 return clib_error_return (0, "unknown input `%U'",
2485 format_unformat_error, input);
2491 /* vhost-user { ... } configuration. */
2492 VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
2495 vhost_user_unmap_all (void)
2497 vhost_user_main_t *vum = &vhost_user_main;
2498 vhost_user_intf_t *vui;
2500 if (vum->dont_dump_vhost_user_memory)
2502 pool_foreach (vui, vum->vhost_user_interfaces,
2503 unmap_all_mem_regions (vui);
2509 * fd.io coding-style-patch-verification: ON
2512 * eval: (c-set-style "gnu")