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/ip/ip.h>
38 #include <vnet/ethernet/ethernet.h>
39 #include <vnet/devices/devices.h>
40 #include <vnet/feature/feature.h>
42 #include <vnet/devices/virtio/vhost_user.h>
43 #include <vnet/devices/virtio/vhost_user_inline.h>
47 * @brief vHost User Device Driver.
49 * This file contains the source code for vHost User interface.
53 vlib_node_registration_t vhost_user_send_interrupt_node;
56 vhost_user_main_t vhost_user_main = {
60 VNET_HW_INTERFACE_CLASS (vhost_interface_class, static) = {
66 get_huge_page_size (int fd)
74 unmap_all_mem_regions (vhost_user_intf_t * vui)
77 vhost_user_vring_t *vq;
79 for (i = 0; i < vui->nregions; i++)
81 if (vui->region_mmap_addr[i] != MAP_FAILED)
84 long page_sz = get_huge_page_size (vui->region_mmap_fd[i]);
86 ssize_t map_sz = (vui->regions[i].memory_size +
87 vui->regions[i].mmap_offset +
88 page_sz - 1) & ~(page_sz - 1);
91 munmap (vui->region_mmap_addr[i] - vui->regions[i].mmap_offset,
94 vu_log_debug (vui, "unmap memory region %d addr 0x%lx len 0x%lx "
95 "page_sz 0x%x", i, vui->region_mmap_addr[i], map_sz,
98 vui->region_mmap_addr[i] = MAP_FAILED;
102 vu_log_err (vui, "failed to unmap memory region (errno %d)",
105 close (vui->region_mmap_fd[i]);
110 for (q = 0; q < VHOST_VRING_MAX_N; q++)
112 vq = &vui->vrings[q];
119 static_always_inline void
120 vhost_user_tx_thread_placement (vhost_user_intf_t * vui)
122 //Let's try to assign one queue to each thread
124 u32 thread_index = 0;
126 vui->use_tx_spinlock = 0;
129 for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid++)
131 vhost_user_vring_t *rxvq = &vui->vrings[VHOST_VRING_IDX_RX (qid)];
132 if (!rxvq->started || !rxvq->enabled)
135 vui->per_cpu_tx_qid[thread_index] = qid;
137 if (thread_index == vlib_get_thread_main ()->n_vlib_mains)
140 //We need to loop, meaning the spinlock has to be used
141 vui->use_tx_spinlock = 1;
142 if (thread_index == 0)
144 //Could not find a single valid one
145 for (thread_index = 0;
146 thread_index < vlib_get_thread_main ()->n_vlib_mains;
149 vui->per_cpu_tx_qid[thread_index] = 0;
157 * @brief Unassign existing interface/queue to thread mappings and re-assign
158 * new interface/queue to thread mappings
160 static_always_inline void
161 vhost_user_rx_thread_placement (vhost_user_intf_t * vui, u32 qid)
163 vhost_user_vring_t *txvq = &vui->vrings[qid];
164 vnet_main_t *vnm = vnet_get_main ();
168 ASSERT ((qid & 1) == 1); // should be odd
169 // Assign new queue mappings for the interface
170 vnet_hw_interface_set_input_node (vnm, vui->hw_if_index,
171 vhost_user_input_node.index);
172 vnet_hw_interface_assign_rx_thread (vnm, vui->hw_if_index, q, ~0);
173 if (txvq->mode == VNET_HW_INTERFACE_RX_MODE_UNKNOWN)
174 /* Set polling as the default */
175 txvq->mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
177 rv = vnet_hw_interface_set_rx_mode (vnm, vui->hw_if_index, q, txvq->mode);
179 vu_log_warn (vui, "unable to set rx mode for interface %d, "
180 "queue %d: rc=%d", vui->hw_if_index, q, rv);
183 /** @brief Returns whether at least one TX and one RX vring are enabled */
184 static_always_inline int
185 vhost_user_intf_ready (vhost_user_intf_t * vui)
187 int i, found[2] = { }; //RX + TX
189 for (i = 0; i < VHOST_VRING_MAX_N; i++)
190 if (vui->vrings[i].started && vui->vrings[i].enabled)
193 return found[0] && found[1];
196 static_always_inline void
197 vhost_user_update_iface_state (vhost_user_intf_t * vui)
199 /* if we have pointers to descriptor table, go up */
200 int is_ready = vhost_user_intf_ready (vui);
201 if (is_ready != vui->is_ready)
203 vu_log_debug (vui, "interface %d %s", vui->sw_if_index,
204 is_ready ? "ready" : "down");
206 vnet_hw_interface_set_flags (vnet_get_main (), vui->hw_if_index,
207 is_ready ? VNET_HW_INTERFACE_FLAG_LINK_UP
209 vui->is_ready = is_ready;
214 vhost_user_set_interrupt_pending (vhost_user_intf_t * vui, u32 ifq)
217 vnet_main_t *vnm = vnet_get_main ();
221 /* Only care about the odd number, or TX, virtqueue */
224 if (vhost_user_intf_ready (vui))
225 // qid >> 1 is to convert virtqueue number to vring queue index
226 vnet_device_input_set_interrupt_pending (vnm, vui->hw_if_index, qid >> 1);
229 static clib_error_t *
230 vhost_user_callfd_read_ready (clib_file_t * uf)
232 __attribute__ ((unused)) int n;
235 n = read (uf->file_descriptor, ((char *) &buff), 8);
240 static_always_inline void
241 vhost_user_thread_placement (vhost_user_intf_t * vui, u32 qid)
243 if (qid & 1) // RX is odd, TX is even
245 if (vui->vrings[qid].qid == -1)
246 vhost_user_rx_thread_placement (vui, qid);
249 vhost_user_tx_thread_placement (vui);
252 static clib_error_t *
253 vhost_user_kickfd_read_ready (clib_file_t * uf)
255 __attribute__ ((unused)) int n;
257 vhost_user_intf_t *vui =
258 pool_elt_at_index (vhost_user_main.vhost_user_interfaces,
259 uf->private_data >> 8);
260 u32 qid = uf->private_data & 0xff;
262 n = read (uf->file_descriptor, ((char *) &buff), 8);
263 vu_log_debug (vui, "if %d KICK queue %d", uf->private_data >> 8, qid);
264 if (!vui->vrings[qid].started ||
265 (vhost_user_intf_ready (vui) != vui->is_ready))
267 if (vui->vrings[qid].started == 0)
269 vui->vrings[qid].started = 1;
270 vhost_user_thread_placement (vui, qid);
271 vhost_user_update_iface_state (vui);
275 vhost_user_set_interrupt_pending (vui, uf->private_data);
279 static_always_inline void
280 vhost_user_vring_init (vhost_user_intf_t * vui, u32 qid)
282 vhost_user_vring_t *vring = &vui->vrings[qid];
283 clib_memset (vring, 0, sizeof (*vring));
284 vring->kickfd_idx = ~0;
285 vring->callfd_idx = ~0;
290 * We have a bug with some qemu 2.5, and this may be a fix.
291 * Feel like interpretation holy text, but this is from vhost-user.txt.
293 * One queue pair is enabled initially. More queues are enabled
294 * dynamically, by sending message VHOST_USER_SET_VRING_ENABLE.
296 * Don't know who's right, but this is what DPDK does.
298 if (qid == 0 || qid == 1)
302 static_always_inline void
303 vhost_user_vring_close (vhost_user_intf_t * vui, u32 qid)
305 vhost_user_vring_t *vring = &vui->vrings[qid];
307 if (vring->kickfd_idx != ~0)
309 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
311 clib_file_del (&file_main, uf);
312 vring->kickfd_idx = ~0;
314 if (vring->callfd_idx != ~0)
316 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
318 clib_file_del (&file_main, uf);
319 vring->callfd_idx = ~0;
321 if (vring->errfd != -1)
323 close (vring->errfd);
327 // save the qid so that we don't need to unassign and assign_rx_thread
328 // when the interface comes back up. They are expensive calls.
329 u16 q = vui->vrings[qid].qid;
330 vhost_user_vring_init (vui, qid);
331 vui->vrings[qid].qid = q;
334 static_always_inline void
335 vhost_user_if_disconnect (vhost_user_intf_t * vui)
337 vnet_main_t *vnm = vnet_get_main ();
340 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
342 if (vui->clib_file_index != ~0)
344 clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
345 vui->clib_file_index = ~0;
350 for (q = 0; q < VHOST_VRING_MAX_N; q++)
351 vhost_user_vring_close (vui, q);
353 unmap_all_mem_regions (vui);
354 vu_log_debug (vui, "interface ifindex %d disconnected", vui->sw_if_index);
357 static clib_error_t *
358 vhost_user_socket_read (clib_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;
370 clib_file_t template = { 0 };
371 vnet_main_t *vnm = vnet_get_main ();
372 vlib_main_t *vm = vlib_get_main ();
374 vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
376 char control[CMSG_SPACE (VHOST_MEMORY_MAX_NREGIONS * sizeof (int))];
378 clib_memset (&mh, 0, sizeof (mh));
379 clib_memset (control, 0, sizeof (control));
381 for (i = 0; i < VHOST_MEMORY_MAX_NREGIONS; i++)
384 /* set the payload */
385 iov[0].iov_base = (void *) &msg;
386 iov[0].iov_len = VHOST_USER_MSG_HDR_SZ;
390 mh.msg_control = control;
391 mh.msg_controllen = sizeof (control);
393 n = recvmsg (uf->file_descriptor, &mh, 0);
395 if (n != VHOST_USER_MSG_HDR_SZ)
399 vu_log_debug (vui, "recvmsg returned error %d %s", errno,
404 vu_log_debug (vui, "n (%d) != VHOST_USER_MSG_HDR_SZ (%d)",
405 n, VHOST_USER_MSG_HDR_SZ);
410 if (mh.msg_flags & MSG_CTRUNC)
412 vu_log_debug (vui, "MSG_CTRUNC is set");
416 cmsg = CMSG_FIRSTHDR (&mh);
418 if (cmsg && (cmsg->cmsg_len > 0) && (cmsg->cmsg_level == SOL_SOCKET) &&
419 (cmsg->cmsg_type == SCM_RIGHTS) &&
420 (cmsg->cmsg_len - CMSG_LEN (0) <=
421 VHOST_MEMORY_MAX_NREGIONS * sizeof (int)))
423 number_of_fds = (cmsg->cmsg_len - CMSG_LEN (0)) / sizeof (int);
424 clib_memcpy_fast (fds, CMSG_DATA (cmsg), number_of_fds * sizeof (int));
427 /* version 1, no reply bit set */
428 if ((msg.flags & 7) != 1)
430 vu_log_debug (vui, "malformed message received. closing socket");
437 read (uf->file_descriptor, ((char *) &msg) + VHOST_USER_MSG_HDR_SZ,
441 vu_log_debug (vui, "read failed %s", strerror (errno));
444 else if (rv != msg.size)
446 vu_log_debug (vui, "message too short (read %dB should be %dB)", rv,
454 case VHOST_USER_GET_FEATURES:
456 msg.u64 = (1ULL << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
457 (1ULL << FEAT_VIRTIO_NET_F_CTRL_VQ) |
458 (1ULL << FEAT_VIRTIO_F_ANY_LAYOUT) |
459 (1ULL << FEAT_VIRTIO_F_INDIRECT_DESC) |
460 (1ULL << FEAT_VHOST_F_LOG_ALL) |
461 (1ULL << FEAT_VIRTIO_NET_F_GUEST_ANNOUNCE) |
462 (1ULL << FEAT_VIRTIO_NET_F_MQ) |
463 (1ULL << FEAT_VHOST_USER_F_PROTOCOL_FEATURES) |
464 (1ULL << FEAT_VIRTIO_F_VERSION_1);
465 msg.u64 &= vui->feature_mask;
468 msg.u64 |= FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
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 ((1 << FEAT_VIRTIO_NET_F_MRG_RXBUF) |
490 (1ULL << FEAT_VIRTIO_F_VERSION_1)))
491 vui->virtio_net_hdr_sz = 12;
493 vui->virtio_net_hdr_sz = 10;
496 (vui->features & (1 << FEAT_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];
574 vlib_worker_thread_barrier_release (vm);
577 case VHOST_USER_SET_VRING_NUM:
578 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_NUM idx %d num %d",
579 vui->hw_if_index, msg.state.index, msg.state.num);
581 if ((msg.state.num > 32768) || /* maximum ring size is 32768 */
582 (msg.state.num == 0) || /* it cannot be zero */
583 ((msg.state.num - 1) & msg.state.num)) /* must be power of 2 */
585 vui->vrings[msg.state.index].qsz_mask = msg.state.num - 1;
588 case VHOST_USER_SET_VRING_ADDR:
589 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_ADDR idx %d",
590 vui->hw_if_index, msg.state.index);
592 if (msg.state.index >= VHOST_VRING_MAX_N)
594 vu_log_debug (vui, "invalid vring index VHOST_USER_SET_VRING_ADDR:"
595 " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
599 if (msg.size < sizeof (msg.addr))
601 vu_log_debug (vui, "vhost message is too short (%d < %d)",
602 msg.size, sizeof (msg.addr));
606 vring_desc_t *desc = map_user_mem (vui, msg.addr.desc_user_addr);
607 vring_used_t *used = map_user_mem (vui, msg.addr.used_user_addr);
608 vring_avail_t *avail = map_user_mem (vui, msg.addr.avail_user_addr);
610 if ((desc == NULL) || (used == NULL) || (avail == NULL))
612 vu_log_debug (vui, "failed to map user memory for hw_if_index %d",
617 vlib_worker_thread_barrier_sync (vm);
618 vui->vrings[msg.state.index].desc = desc;
619 vui->vrings[msg.state.index].used = used;
620 vui->vrings[msg.state.index].avail = avail;
622 vui->vrings[msg.state.index].log_guest_addr = msg.addr.log_guest_addr;
623 vui->vrings[msg.state.index].log_used =
624 (msg.addr.flags & (1 << VHOST_VRING_F_LOG)) ? 1 : 0;
626 /* Spec says: If VHOST_USER_F_PROTOCOL_FEATURES has not been negotiated,
627 the ring is initialized in an enabled state. */
628 if (!(vui->features & (1 << FEAT_VHOST_USER_F_PROTOCOL_FEATURES)))
629 vui->vrings[msg.state.index].enabled = 1;
631 vui->vrings[msg.state.index].last_used_idx =
632 vui->vrings[msg.state.index].last_avail_idx =
633 vui->vrings[msg.state.index].used->idx;
635 /* tell driver that we don't want interrupts */
636 vui->vrings[msg.state.index].used->flags = VRING_USED_F_NO_NOTIFY;
637 vlib_worker_thread_barrier_release (vm);
638 vhost_user_update_iface_state (vui);
641 case VHOST_USER_SET_OWNER:
642 vu_log_debug (vui, "if %d msg VHOST_USER_SET_OWNER", vui->hw_if_index);
645 case VHOST_USER_RESET_OWNER:
646 vu_log_debug (vui, "if %d msg VHOST_USER_RESET_OWNER",
650 case VHOST_USER_SET_VRING_CALL:
651 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_CALL %d",
652 vui->hw_if_index, msg.u64);
654 q = (u8) (msg.u64 & 0xFF);
656 /* if there is old fd, delete and close it */
657 if (vui->vrings[q].callfd_idx != ~0)
659 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
660 vui->vrings[q].callfd_idx);
661 clib_file_del (&file_main, uf);
662 vui->vrings[q].callfd_idx = ~0;
665 if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
667 if (number_of_fds != 1)
669 vu_log_debug (vui, "More than one fd received !");
673 template.read_function = vhost_user_callfd_read_ready;
674 template.file_descriptor = fds[0];
675 template.private_data =
676 ((vui - vhost_user_main.vhost_user_interfaces) << 8) + q;
677 vui->vrings[q].callfd_idx = clib_file_add (&file_main, &template);
680 vui->vrings[q].callfd_idx = ~0;
683 case VHOST_USER_SET_VRING_KICK:
684 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_KICK %d",
685 vui->hw_if_index, msg.u64);
687 q = (u8) (msg.u64 & 0xFF);
689 if (vui->vrings[q].kickfd_idx != ~0)
691 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
692 vui->vrings[q].kickfd_idx);
693 clib_file_del (&file_main, uf);
694 vui->vrings[q].kickfd_idx = ~0;
697 if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
699 if (number_of_fds != 1)
701 vu_log_debug (vui, "More than one fd received !");
705 template.read_function = vhost_user_kickfd_read_ready;
706 template.file_descriptor = fds[0];
707 template.private_data =
708 (((uword) (vui - vhost_user_main.vhost_user_interfaces)) << 8) +
710 vui->vrings[q].kickfd_idx = clib_file_add (&file_main, &template);
714 //When no kickfd is set, the queue is initialized as started
715 vui->vrings[q].kickfd_idx = ~0;
716 vui->vrings[q].started = 1;
717 vhost_user_thread_placement (vui, q);
719 vhost_user_update_iface_state (vui);
722 case VHOST_USER_SET_VRING_ERR:
723 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_ERR %d",
724 vui->hw_if_index, msg.u64);
726 q = (u8) (msg.u64 & 0xFF);
728 if (vui->vrings[q].errfd != -1)
729 close (vui->vrings[q].errfd);
731 if (!(msg.u64 & VHOST_USER_VRING_NOFD_MASK))
733 if (number_of_fds != 1)
736 vui->vrings[q].errfd = fds[0];
739 vui->vrings[q].errfd = -1;
742 case VHOST_USER_SET_VRING_BASE:
743 vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_BASE idx %d num %d",
744 vui->hw_if_index, msg.state.index, msg.state.num);
745 vlib_worker_thread_barrier_sync (vm);
746 vui->vrings[msg.state.index].last_avail_idx = msg.state.num;
747 vlib_worker_thread_barrier_release (vm);
750 case VHOST_USER_GET_VRING_BASE:
751 if (msg.state.index >= VHOST_VRING_MAX_N)
753 vu_log_debug (vui, "invalid vring index VHOST_USER_GET_VRING_BASE:"
754 " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
758 /* protection is needed to prevent rx/tx from changing last_avail_idx */
759 vlib_worker_thread_barrier_sync (vm);
761 * Copy last_avail_idx from the vring before closing it because
762 * closing the vring also initializes the vring last_avail_idx
764 msg.state.num = vui->vrings[msg.state.index].last_avail_idx;
766 msg.size = sizeof (msg.state);
769 * Spec says: Client must [...] stop ring upon receiving
770 * VHOST_USER_GET_VRING_BASE
772 vhost_user_vring_close (vui, msg.state.index);
773 vlib_worker_thread_barrier_release (vm);
774 vu_log_debug (vui, "if %d msg VHOST_USER_GET_VRING_BASE idx %d num %d",
775 vui->hw_if_index, msg.state.index, msg.state.num);
777 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
778 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
780 vu_log_debug (vui, "could not send message response");
783 vhost_user_update_iface_state (vui);
786 case VHOST_USER_NONE:
787 vu_log_debug (vui, "if %d msg VHOST_USER_NONE", vui->hw_if_index);
790 case VHOST_USER_SET_LOG_BASE:
791 vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_BASE",
794 if (msg.size != sizeof (msg.log))
796 vu_log_debug (vui, "invalid msg size for VHOST_USER_SET_LOG_BASE:"
797 " %d instead of %d", msg.size, sizeof (msg.log));
801 if (!(vui->protocol_features & (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD)))
803 vu_log_debug (vui, "VHOST_USER_PROTOCOL_F_LOG_SHMFD not set but "
804 "VHOST_USER_SET_LOG_BASE received");
809 /* align size to page */
810 long page_sz = get_huge_page_size (fd);
812 (msg.log.size + msg.log.offset + page_sz - 1) & ~(page_sz - 1);
814 void *log_base_addr = mmap (0, map_sz, PROT_READ | PROT_WRITE,
817 vu_log_debug (vui, "map log region addr 0 len 0x%lx off 0x%lx fd %d "
818 "mapped 0x%lx", map_sz, msg.log.offset, fd,
821 if (log_base_addr == MAP_FAILED)
823 vu_log_err (vui, "failed to map memory. errno is %d", errno);
827 vlib_worker_thread_barrier_sync (vm);
828 vui->log_base_addr = log_base_addr;
829 vui->log_base_addr += msg.log.offset;
830 vui->log_size = msg.log.size;
831 vlib_worker_thread_barrier_release (vm);
834 msg.size = sizeof (msg.u64);
836 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
837 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
839 vu_log_debug (vui, "could not send message response");
844 case VHOST_USER_SET_LOG_FD:
845 vu_log_debug (vui, "if %d msg VHOST_USER_SET_LOG_FD", vui->hw_if_index);
848 case VHOST_USER_GET_PROTOCOL_FEATURES:
850 msg.u64 = (1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD) |
851 (1 << VHOST_USER_PROTOCOL_F_MQ);
852 msg.size = sizeof (msg.u64);
853 vu_log_debug (vui, "if %d msg VHOST_USER_GET_PROTOCOL_FEATURES - "
854 "reply 0x%016llx", vui->hw_if_index, msg.u64);
856 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
857 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
859 vu_log_debug (vui, "could not send message response");
864 case VHOST_USER_SET_PROTOCOL_FEATURES:
865 vu_log_debug (vui, "if %d msg VHOST_USER_SET_PROTOCOL_FEATURES "
866 "features 0x%016llx", vui->hw_if_index, msg.u64);
867 vui->protocol_features = msg.u64;
870 case VHOST_USER_GET_QUEUE_NUM:
872 msg.u64 = VHOST_VRING_MAX_N;
873 msg.size = sizeof (msg.u64);
874 vu_log_debug (vui, "if %d msg VHOST_USER_GET_QUEUE_NUM - reply %d",
875 vui->hw_if_index, msg.u64);
877 send (uf->file_descriptor, &msg, VHOST_USER_MSG_HDR_SZ + msg.size, 0);
878 if (n != (msg.size + VHOST_USER_MSG_HDR_SZ))
880 vu_log_debug (vui, "could not send message response");
885 case VHOST_USER_SET_VRING_ENABLE:
886 vu_log_debug (vui, "if %d VHOST_USER_SET_VRING_ENABLE: %s queue %d",
887 vui->hw_if_index, msg.state.num ? "enable" : "disable",
889 if (msg.state.index >= VHOST_VRING_MAX_N)
891 vu_log_debug (vui, "invalid vring idx VHOST_USER_SET_VRING_ENABLE:"
892 " %d >= %d", msg.state.index, VHOST_VRING_MAX_N);
896 vui->vrings[msg.state.index].enabled = msg.state.num;
897 vhost_user_thread_placement (vui, msg.state.index);
898 vhost_user_update_iface_state (vui);
902 vu_log_debug (vui, "unknown vhost-user message %d received. "
903 "closing socket", msg.request);
910 vlib_worker_thread_barrier_sync (vm);
911 vhost_user_if_disconnect (vui);
912 vlib_worker_thread_barrier_release (vm);
913 vhost_user_update_iface_state (vui);
917 static clib_error_t *
918 vhost_user_socket_error (clib_file_t * uf)
920 vlib_main_t *vm = vlib_get_main ();
921 vhost_user_main_t *vum = &vhost_user_main;
922 vhost_user_intf_t *vui =
923 pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
925 vu_log_debug (vui, "socket error on if %d", vui->sw_if_index);
926 vlib_worker_thread_barrier_sync (vm);
927 vhost_user_if_disconnect (vui);
928 vlib_worker_thread_barrier_release (vm);
932 static clib_error_t *
933 vhost_user_socksvr_accept_ready (clib_file_t * uf)
935 int client_fd, client_len;
936 struct sockaddr_un client;
937 clib_file_t template = { 0 };
938 vhost_user_main_t *vum = &vhost_user_main;
939 vhost_user_intf_t *vui;
941 vui = pool_elt_at_index (vum->vhost_user_interfaces, uf->private_data);
943 client_len = sizeof (client);
944 client_fd = accept (uf->file_descriptor,
945 (struct sockaddr *) &client,
946 (socklen_t *) & client_len);
949 return clib_error_return_unix (0, "accept");
951 if (vui->clib_file_index != ~0)
953 vu_log_debug (vui, "Close client socket for vhost interface %d, fd %d",
954 vui->sw_if_index, UNIX_GET_FD (vui->clib_file_index));
955 clib_file_del (&file_main, file_main.file_pool + vui->clib_file_index);
958 vu_log_debug (vui, "New client socket for vhost interface %d, fd %d",
959 vui->sw_if_index, client_fd);
960 template.read_function = vhost_user_socket_read;
961 template.error_function = vhost_user_socket_error;
962 template.file_descriptor = client_fd;
963 template.private_data = vui - vhost_user_main.vhost_user_interfaces;
964 vui->clib_file_index = clib_file_add (&file_main, &template);
968 static clib_error_t *
969 vhost_user_init (vlib_main_t * vm)
971 vhost_user_main_t *vum = &vhost_user_main;
972 vlib_thread_main_t *tm = vlib_get_thread_main ();
974 vum->log_default = vlib_log_register_class ("vhost-user", 0);
976 vum->coalesce_frames = 32;
977 vum->coalesce_time = 1e-3;
979 vec_validate (vum->cpus, tm->n_vlib_mains - 1);
982 vec_foreach (cpu, vum->cpus)
984 /* This is actually not necessary as validate already zeroes it
985 * Just keeping the loop here for later because I am lazy. */
986 cpu->rx_buffers_len = 0;
989 vum->random = random_default_seed ();
991 mhash_init_c_string (&vum->if_index_by_sock_name, sizeof (uword));
997 VLIB_INIT_FUNCTION (vhost_user_init) =
999 .runs_after = VLIB_INITS("ip4_init"),
1004 vhost_user_send_interrupt_process (vlib_main_t * vm,
1005 vlib_node_runtime_t * rt, vlib_frame_t * f)
1007 vhost_user_intf_t *vui;
1008 f64 timeout = 3153600000.0 /* 100 years */ ;
1009 uword event_type, *event_data = 0;
1010 vhost_user_main_t *vum = &vhost_user_main;
1012 f64 now, poll_time_remaining;
1018 poll_time_remaining =
1019 vlib_process_wait_for_event_or_clock (vm, timeout);
1020 event_type = vlib_process_get_events (vm, &event_data);
1021 vec_reset_length (event_data);
1024 * Use the remaining timeout if it is less than coalesce time to avoid
1025 * resetting the existing timer in the middle of expiration
1027 timeout = poll_time_remaining;
1028 if (vlib_process_suspend_time_is_zero (timeout) ||
1029 (timeout > vum->coalesce_time))
1030 timeout = vum->coalesce_time;
1032 now = vlib_time_now (vm);
1035 case VHOST_USER_EVENT_STOP_TIMER:
1039 case VHOST_USER_EVENT_START_TIMER:
1041 if (!vlib_process_suspend_time_is_zero (poll_time_remaining))
1047 pool_foreach (vui, vum->vhost_user_interfaces, {
1048 next_timeout = timeout;
1049 for (qid = 0; qid < VHOST_VRING_MAX_N / 2; qid += 2)
1051 vhost_user_vring_t *rxvq = &vui->vrings[qid];
1052 vhost_user_vring_t *txvq = &vui->vrings[qid + 1];
1054 if (txvq->qid == -1)
1056 if (txvq->n_since_last_int)
1058 if (now >= txvq->int_deadline)
1059 vhost_user_send_call (vm, txvq);
1061 next_timeout = txvq->int_deadline - now;
1064 if (rxvq->n_since_last_int)
1066 if (now >= rxvq->int_deadline)
1067 vhost_user_send_call (vm, rxvq);
1069 next_timeout = rxvq->int_deadline - now;
1072 if ((next_timeout < timeout) && (next_timeout > 0.0))
1073 timeout = next_timeout;
1080 clib_warning ("BUG: unhandled event type %d", event_type);
1083 /* No less than 1 millisecond */
1087 timeout = 3153600000.0;
1093 VLIB_REGISTER_NODE (vhost_user_send_interrupt_node) = {
1094 .function = vhost_user_send_interrupt_process,
1095 .type = VLIB_NODE_TYPE_PROCESS,
1096 .name = "vhost-user-send-interrupt-process",
1101 vhost_user_process (vlib_main_t * vm,
1102 vlib_node_runtime_t * rt, vlib_frame_t * f)
1104 vhost_user_main_t *vum = &vhost_user_main;
1105 vhost_user_intf_t *vui;
1106 struct sockaddr_un sun;
1108 clib_file_t template = { 0 };
1109 f64 timeout = 3153600000.0 /* 100 years */ ;
1110 uword *event_data = 0;
1113 sun.sun_family = AF_UNIX;
1114 template.read_function = vhost_user_socket_read;
1115 template.error_function = vhost_user_socket_error;
1119 vlib_process_wait_for_event_or_clock (vm, timeout);
1120 vlib_process_get_events (vm, &event_data);
1121 vec_reset_length (event_data);
1126 pool_foreach (vui, vum->vhost_user_interfaces, {
1128 if (vui->unix_server_index == ~0) { //Nothing to do for server sockets
1129 if (vui->clib_file_index == ~0)
1132 ((sockfd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0))
1135 * 1st time error or new error for this interface,
1136 * spit out the message and record the error
1138 if (!vui->sock_errno || (vui->sock_errno != errno))
1141 ("Error: Could not open unix socket for %s",
1142 vui->sock_filename);
1143 vui->sock_errno = errno;
1148 /* try to connect */
1149 strncpy (sun.sun_path, (char *) vui->sock_filename,
1150 sizeof (sun.sun_path) - 1);
1152 /* Avoid hanging VPP if the other end does not accept */
1153 if (fcntl(sockfd, F_SETFL, O_NONBLOCK) < 0)
1154 clib_unix_warning ("fcntl");
1156 if (connect (sockfd, (struct sockaddr *) &sun,
1157 sizeof (struct sockaddr_un)) == 0)
1159 /* Set the socket to blocking as it was before */
1160 if (fcntl(sockfd, F_SETFL, 0) < 0)
1161 clib_unix_warning ("fcntl2");
1163 vui->sock_errno = 0;
1164 template.file_descriptor = sockfd;
1165 template.private_data =
1166 vui - vhost_user_main.vhost_user_interfaces;
1167 vui->clib_file_index = clib_file_add (&file_main, &template);
1169 /* This sockfd is considered consumed */
1174 vui->sock_errno = errno;
1179 /* check if socket is alive */
1181 socklen_t len = sizeof (error);
1182 int fd = UNIX_GET_FD(vui->clib_file_index);
1184 getsockopt (fd, SOL_SOCKET, SO_ERROR, &error, &len);
1188 vu_log_debug (vui, "getsockopt returned %d", retval);
1189 vhost_user_if_disconnect (vui);
1200 VLIB_REGISTER_NODE (vhost_user_process_node,static) = {
1201 .function = vhost_user_process,
1202 .type = VLIB_NODE_TYPE_PROCESS,
1203 .name = "vhost-user-process",
1208 * Disables and reset interface structure.
1209 * It can then be either init again, or removed from used interfaces.
1212 vhost_user_term_if (vhost_user_intf_t * vui)
1215 vhost_user_main_t *vum = &vhost_user_main;
1217 // disconnect interface sockets
1218 vhost_user_if_disconnect (vui);
1219 vhost_user_update_gso_interface_count (vui, 0 /* delete */ );
1220 vhost_user_update_iface_state (vui);
1222 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1224 // Remove existing queue mapping for the interface
1228 vnet_main_t *vnm = vnet_get_main ();
1229 vhost_user_vring_t *txvq = &vui->vrings[q];
1231 if (txvq->qid != -1)
1233 rv = vnet_hw_interface_unassign_rx_thread (vnm,
1237 vu_log_warn (vui, "unable to unassign interface %d, "
1238 "queue %d: rc=%d", vui->hw_if_index, q >> 1, rv);
1242 clib_mem_free ((void *) vui->vring_locks[q]);
1245 if (vui->unix_server_index != ~0)
1247 //Close server socket
1248 clib_file_t *uf = pool_elt_at_index (file_main.file_pool,
1249 vui->unix_server_index);
1250 clib_file_del (&file_main, uf);
1251 vui->unix_server_index = ~0;
1252 unlink (vui->sock_filename);
1255 mhash_unset (&vum->if_index_by_sock_name, vui->sock_filename,
1260 vhost_user_delete_if (vnet_main_t * vnm, vlib_main_t * vm, u32 sw_if_index)
1262 vhost_user_main_t *vum = &vhost_user_main;
1263 vhost_user_intf_t *vui;
1265 vnet_hw_interface_t *hwif;
1270 vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index))
1271 || hwif->dev_class_index != vhost_user_device_class.index)
1272 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1274 vui = pool_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
1276 vu_log_debug (vui, "Deleting vhost-user interface %s (instance %d)",
1277 hwif->name, hwif->dev_instance);
1279 for (qid = 1; qid < VHOST_VRING_MAX_N / 2; qid += 2)
1281 vhost_user_vring_t *txvq = &vui->vrings[qid];
1283 if (txvq->qid == -1)
1285 if ((vum->ifq_count > 0) &&
1286 ((txvq->mode == VNET_HW_INTERFACE_RX_MODE_INTERRUPT) ||
1287 (txvq->mode == VNET_HW_INTERFACE_RX_MODE_ADAPTIVE)))
1290 // Stop the timer if there is no more interrupt interface/queue
1291 if ((vum->ifq_count == 0) &&
1292 (vum->coalesce_time > 0.0) && (vum->coalesce_frames > 0))
1294 vlib_process_signal_event (vm,
1295 vhost_user_send_interrupt_node.index,
1296 VHOST_USER_EVENT_STOP_TIMER, 0);
1302 // Disable and reset interface
1303 vhost_user_term_if (vui);
1305 // Reset renumbered iface
1306 if (hwif->dev_instance <
1307 vec_len (vum->show_dev_instance_by_real_dev_instance))
1308 vum->show_dev_instance_by_real_dev_instance[hwif->dev_instance] = ~0;
1310 // Delete ethernet interface
1311 ethernet_delete_interface (vnm, vui->hw_if_index);
1314 pool_put (vum->vhost_user_interfaces, vui);
1319 static clib_error_t *
1320 vhost_user_exit (vlib_main_t * vm)
1322 vnet_main_t *vnm = vnet_get_main ();
1323 vhost_user_main_t *vum = &vhost_user_main;
1324 vhost_user_intf_t *vui;
1326 vlib_worker_thread_barrier_sync (vlib_get_main ());
1328 pool_foreach (vui, vum->vhost_user_interfaces, {
1329 vhost_user_delete_if (vnm, vm, vui->sw_if_index);
1332 vlib_worker_thread_barrier_release (vlib_get_main ());
1336 VLIB_MAIN_LOOP_EXIT_FUNCTION (vhost_user_exit);
1339 * Open server unix socket on specified sock_filename.
1342 vhost_user_init_server_sock (const char *sock_filename, int *sock_fd)
1345 struct sockaddr_un un = { };
1347 /* create listening socket */
1348 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
1349 return VNET_API_ERROR_SYSCALL_ERROR_1;
1351 un.sun_family = AF_UNIX;
1352 strncpy ((char *) un.sun_path, (char *) sock_filename,
1353 sizeof (un.sun_path) - 1);
1355 /* remove if exists */
1356 unlink ((char *) sock_filename);
1358 if (bind (fd, (struct sockaddr *) &un, sizeof (un)) == -1)
1360 rv = VNET_API_ERROR_SYSCALL_ERROR_2;
1364 if (listen (fd, 1) == -1)
1366 rv = VNET_API_ERROR_SYSCALL_ERROR_3;
1379 * Create ethernet interface for vhost user interface.
1382 vhost_user_create_ethernet (vnet_main_t * vnm, vlib_main_t * vm,
1383 vhost_user_intf_t * vui, u8 * hwaddress)
1385 vhost_user_main_t *vum = &vhost_user_main;
1387 clib_error_t *error;
1389 /* create hw and sw interface */
1392 clib_memcpy (hwaddr, hwaddress, 6);
1396 random_u32 (&vum->random);
1397 clib_memcpy (hwaddr + 2, &vum->random, sizeof (vum->random));
1402 error = ethernet_register_interface
1404 vhost_user_device_class.index,
1405 vui - vum->vhost_user_interfaces /* device instance */ ,
1406 hwaddr /* ethernet address */ ,
1407 &vui->hw_if_index, 0 /* flag change */ );
1410 clib_error_report (error);
1414 * Initialize vui with specified attributes
1417 vhost_user_vui_init (vnet_main_t * vnm,
1418 vhost_user_intf_t * vui,
1420 const char *sock_filename,
1421 u64 feature_mask, u32 * sw_if_index, u8 enable_gso)
1423 vnet_sw_interface_t *sw;
1425 vhost_user_main_t *vum = &vhost_user_main;
1426 vnet_hw_interface_t *hw;
1428 hw = vnet_get_hw_interface (vnm, vui->hw_if_index);
1429 sw = vnet_get_hw_sw_interface (vnm, vui->hw_if_index);
1430 if (server_sock_fd != -1)
1432 clib_file_t template = { 0 };
1433 template.read_function = vhost_user_socksvr_accept_ready;
1434 template.file_descriptor = server_sock_fd;
1435 template.private_data = vui - vum->vhost_user_interfaces; //hw index
1436 vui->unix_server_index = clib_file_add (&file_main, &template);
1440 vui->unix_server_index = ~0;
1443 vui->sw_if_index = sw->sw_if_index;
1444 strncpy (vui->sock_filename, sock_filename,
1445 ARRAY_LEN (vui->sock_filename) - 1);
1446 vui->sock_errno = 0;
1448 vui->feature_mask = feature_mask;
1449 vui->clib_file_index = ~0;
1450 vui->log_base_addr = 0;
1451 vui->if_index = vui - vum->vhost_user_interfaces;
1452 vui->enable_gso = enable_gso;
1454 * enable_gso takes precedence over configurable feature mask if there
1456 * if feature mask disables gso, but enable_gso is configured,
1457 * then gso is enable
1458 * if feature mask enables gso, but enable_gso is not configured,
1459 * then gso is enable
1461 * if gso is enable via feature mask, it must enable both host and guest
1462 * gso feature mask, we don't support one sided GSO or partial GSO.
1464 if ((vui->enable_gso == 0) &&
1465 ((feature_mask & FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS) ==
1466 (FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS)))
1467 vui->enable_gso = 1;
1468 vhost_user_update_gso_interface_count (vui, 1 /* add */ );
1469 mhash_set_mem (&vum->if_index_by_sock_name, vui->sock_filename,
1472 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1473 vhost_user_vring_init (vui, q);
1475 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
1476 vnet_hw_interface_set_flags (vnm, vui->hw_if_index, 0);
1479 *sw_if_index = vui->sw_if_index;
1481 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1483 vui->vring_locks[q] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
1484 CLIB_CACHE_LINE_BYTES);
1485 clib_memset ((void *) vui->vring_locks[q], 0, CLIB_CACHE_LINE_BYTES);
1488 vec_validate (vui->per_cpu_tx_qid,
1489 vlib_get_thread_main ()->n_vlib_mains - 1);
1490 vhost_user_tx_thread_placement (vui);
1494 vhost_user_create_if (vnet_main_t * vnm, vlib_main_t * vm,
1495 const char *sock_filename,
1499 u8 renumber, u32 custom_dev_instance, u8 * hwaddr,
1502 vhost_user_intf_t *vui = NULL;
1505 int server_sock_fd = -1;
1506 vhost_user_main_t *vum = &vhost_user_main;
1509 if (sock_filename == NULL || !(strlen (sock_filename) > 0))
1511 return VNET_API_ERROR_INVALID_ARGUMENT;
1514 if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
1519 vui = &vum->vhost_user_interfaces[*if_index];
1520 *sw_if_index = vui->sw_if_index;
1522 return VNET_API_ERROR_IF_ALREADY_EXISTS;
1528 vhost_user_init_server_sock (sock_filename, &server_sock_fd)) != 0)
1534 /* Protect the uninitialized vui from being dispatched by rx/tx */
1535 vlib_worker_thread_barrier_sync (vm);
1536 pool_get (vhost_user_main.vhost_user_interfaces, vui);
1537 vhost_user_create_ethernet (vnm, vm, vui, hwaddr);
1538 vlib_worker_thread_barrier_release (vm);
1540 vhost_user_vui_init (vnm, vui, server_sock_fd, sock_filename,
1541 feature_mask, &sw_if_idx, enable_gso);
1542 vnet_sw_interface_set_mtu (vnm, vui->sw_if_index, 9000);
1543 vhost_user_rx_thread_placement (vui, 1);
1546 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1549 *sw_if_index = sw_if_idx;
1551 // Process node must connect
1552 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1558 vhost_user_modify_if (vnet_main_t * vnm, vlib_main_t * vm,
1559 const char *sock_filename,
1562 u64 feature_mask, u8 renumber, u32 custom_dev_instance,
1565 vhost_user_main_t *vum = &vhost_user_main;
1566 vhost_user_intf_t *vui = NULL;
1568 int server_sock_fd = -1;
1570 vnet_hw_interface_t *hwif;
1575 vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index))
1576 || hwif->dev_class_index != vhost_user_device_class.index)
1577 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1579 if (sock_filename == NULL || !(strlen (sock_filename) > 0))
1580 return VNET_API_ERROR_INVALID_ARGUMENT;
1582 vui = vec_elt_at_index (vum->vhost_user_interfaces, hwif->dev_instance);
1585 * Disallow changing the interface to have the same path name
1586 * as other interface
1588 if_index = mhash_get (&vum->if_index_by_sock_name, (void *) sock_filename);
1589 if (if_index && (*if_index != vui->if_index))
1590 return VNET_API_ERROR_IF_ALREADY_EXISTS;
1592 // First try to open server socket
1594 if ((rv = vhost_user_init_server_sock (sock_filename,
1595 &server_sock_fd)) != 0)
1598 vhost_user_term_if (vui);
1599 vhost_user_vui_init (vnm, vui, server_sock_fd,
1600 sock_filename, feature_mask, &sw_if_idx, enable_gso);
1603 vnet_interface_name_renumber (sw_if_idx, custom_dev_instance);
1605 // Process node must connect
1606 vlib_process_signal_event (vm, vhost_user_process_node.index, 0, 0);
1612 vhost_user_connect_command_fn (vlib_main_t * vm,
1613 unformat_input_t * input,
1614 vlib_cli_command_t * cmd)
1616 unformat_input_t _line_input, *line_input = &_line_input;
1617 u8 *sock_filename = NULL;
1620 u64 feature_mask = (u64) ~ (0ULL);
1622 u32 custom_dev_instance = ~0;
1625 clib_error_t *error = NULL;
1628 /* Get a line of input. */
1629 if (!unformat_user (input, unformat_line_input, line_input))
1632 /* GSO feature is disable by default */
1633 feature_mask &= ~FEATURE_VIRTIO_NET_F_HOST_GUEST_TSO_FEATURE_BITS;
1634 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1636 if (unformat (line_input, "socket %s", &sock_filename))
1638 else if (unformat (line_input, "server"))
1640 else if (unformat (line_input, "gso"))
1642 else if (unformat (line_input, "feature-mask 0x%llx", &feature_mask))
1646 (line_input, "hwaddr %U", unformat_ethernet_address, hwaddr))
1648 else if (unformat (line_input, "renumber %d", &custom_dev_instance))
1654 error = clib_error_return (0, "unknown input `%U'",
1655 format_unformat_error, line_input);
1660 vnet_main_t *vnm = vnet_get_main ();
1663 if ((rv = vhost_user_create_if (vnm, vm, (char *) sock_filename,
1664 is_server, &sw_if_index, feature_mask,
1665 renumber, custom_dev_instance, hw,
1668 error = clib_error_return (0, "vhost_user_create_if returned %d", rv);
1672 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
1676 vec_free (sock_filename);
1677 unformat_free (line_input);
1683 vhost_user_delete_command_fn (vlib_main_t * vm,
1684 unformat_input_t * input,
1685 vlib_cli_command_t * cmd)
1687 unformat_input_t _line_input, *line_input = &_line_input;
1688 u32 sw_if_index = ~0;
1689 vnet_main_t *vnm = vnet_get_main ();
1690 clib_error_t *error = NULL;
1692 /* Get a line of input. */
1693 if (!unformat_user (input, unformat_line_input, line_input))
1696 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1698 if (unformat (line_input, "sw_if_index %d", &sw_if_index))
1701 (line_input, "%U", unformat_vnet_sw_interface, vnm,
1704 vnet_hw_interface_t *hwif =
1705 vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
1707 vhost_user_device_class.index != hwif->dev_class_index)
1709 error = clib_error_return (0, "Not a vhost interface");
1715 error = clib_error_return (0, "unknown input `%U'",
1716 format_unformat_error, line_input);
1721 vhost_user_delete_if (vnm, vm, sw_if_index);
1724 unformat_free (line_input);
1730 vhost_user_dump_ifs (vnet_main_t * vnm, vlib_main_t * vm,
1731 vhost_user_intf_details_t ** out_vuids)
1734 vhost_user_main_t *vum = &vhost_user_main;
1735 vhost_user_intf_t *vui;
1736 vhost_user_intf_details_t *r_vuids = NULL;
1737 vhost_user_intf_details_t *vuid = NULL;
1738 u32 *hw_if_indices = 0;
1739 vnet_hw_interface_t *hi;
1746 pool_foreach (vui, vum->vhost_user_interfaces,
1747 vec_add1 (hw_if_indices, vui->hw_if_index);
1750 for (i = 0; i < vec_len (hw_if_indices); i++)
1752 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
1753 vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
1755 vec_add2 (r_vuids, vuid, 1);
1756 vuid->sw_if_index = vui->sw_if_index;
1757 vuid->virtio_net_hdr_sz = vui->virtio_net_hdr_sz;
1758 vuid->features = vui->features;
1759 vuid->num_regions = vui->nregions;
1760 vuid->is_server = vui->unix_server_index != ~0;
1761 vuid->sock_errno = vui->sock_errno;
1762 strncpy ((char *) vuid->sock_filename, (char *) vui->sock_filename,
1763 sizeof (vuid->sock_filename));
1764 vuid->sock_filename[ARRAY_LEN (vuid->sock_filename) - 1] = '\0';
1765 s = format (s, "%v%c", hi->name, 0);
1767 strncpy ((char *) vuid->if_name, (char *) s,
1768 ARRAY_LEN (vuid->if_name) - 1);
1773 vec_free (hw_if_indices);
1775 *out_vuids = r_vuids;
1781 show_vhost_user_command_fn (vlib_main_t * vm,
1782 unformat_input_t * input,
1783 vlib_cli_command_t * cmd)
1785 clib_error_t *error = 0;
1786 vnet_main_t *vnm = vnet_get_main ();
1787 vhost_user_main_t *vum = &vhost_user_main;
1788 vhost_user_intf_t *vui;
1789 u32 hw_if_index, *hw_if_indices = 0;
1790 vnet_hw_interface_t *hi;
1800 struct feat_struct *feat_entry;
1802 static struct feat_struct feat_array[] = {
1803 #define _(s,b) { .str = #s, .bit = b, },
1804 foreach_virtio_net_feature
1809 #define foreach_protocol_feature \
1810 _(VHOST_USER_PROTOCOL_F_MQ) \
1811 _(VHOST_USER_PROTOCOL_F_LOG_SHMFD)
1813 static struct feat_struct proto_feat_array[] = {
1814 #define _(s) { .str = #s, .bit = s},
1815 foreach_protocol_feature
1820 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1823 (input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
1825 hi = vnet_get_hw_interface (vnm, hw_if_index);
1826 if (vhost_user_device_class.index != hi->dev_class_index)
1828 error = clib_error_return (0, "unknown input `%U'",
1829 format_unformat_error, input);
1832 vec_add1 (hw_if_indices, hw_if_index);
1834 else if (unformat (input, "descriptors") || unformat (input, "desc"))
1838 error = clib_error_return (0, "unknown input `%U'",
1839 format_unformat_error, input);
1843 if (vec_len (hw_if_indices) == 0)
1845 pool_foreach (vui, vum->vhost_user_interfaces,
1846 vec_add1 (hw_if_indices, vui->hw_if_index);
1849 vlib_cli_output (vm, "Virtio vhost-user interfaces");
1850 vlib_cli_output (vm, "Global:\n coalesce frames %d time %e",
1851 vum->coalesce_frames, vum->coalesce_time);
1852 vlib_cli_output (vm, " Number of rx virtqueues in interrupt mode: %d",
1854 vlib_cli_output (vm, " Number of GSO interfaces: %d", vum->gso_count);
1856 for (i = 0; i < vec_len (hw_if_indices); i++)
1858 hi = vnet_get_hw_interface (vnm, hw_if_indices[i]);
1859 vui = pool_elt_at_index (vum->vhost_user_interfaces, hi->dev_instance);
1860 vlib_cli_output (vm, "Interface: %U (ifindex %d)",
1861 format_vnet_hw_if_index_name, vnm, hw_if_indices[i],
1863 if (vui->enable_gso)
1864 vlib_cli_output (vm, " GSO enable");
1866 vlib_cli_output (vm, "virtio_net_hdr_sz %d\n"
1867 " features mask (0x%llx): \n"
1868 " features (0x%llx): \n",
1869 vui->virtio_net_hdr_sz, vui->feature_mask,
1872 feat_entry = (struct feat_struct *) &feat_array;
1873 while (feat_entry->str)
1875 if (vui->features & (1ULL << feat_entry->bit))
1876 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
1881 vlib_cli_output (vm, " protocol features (0x%llx)",
1882 vui->protocol_features);
1883 feat_entry = (struct feat_struct *) &proto_feat_array;
1884 while (feat_entry->str)
1886 if (vui->protocol_features & (1ULL << feat_entry->bit))
1887 vlib_cli_output (vm, " %s (%d)", feat_entry->str,
1892 vlib_cli_output (vm, "\n");
1894 vlib_cli_output (vm, " socket filename %s type %s errno \"%s\"\n\n",
1896 (vui->unix_server_index != ~0) ? "server" : "client",
1897 strerror (vui->sock_errno));
1899 vlib_cli_output (vm, " rx placement: ");
1901 for (qid = 1; qid < VHOST_VRING_MAX_N / 2; qid += 2)
1903 vnet_main_t *vnm = vnet_get_main ();
1905 vnet_hw_interface_rx_mode mode;
1906 vhost_user_vring_t *txvq = &vui->vrings[qid];
1908 if (txvq->qid == -1)
1911 vnet_get_device_input_thread_index (vnm, vui->hw_if_index,
1913 vnet_hw_interface_get_rx_mode (vnm, vui->hw_if_index, qid >> 1,
1915 vlib_cli_output (vm, " thread %d on vring %d, %U\n",
1917 format_vnet_hw_interface_rx_mode, mode);
1920 vlib_cli_output (vm, " tx placement: %s\n",
1921 vui->use_tx_spinlock ? "spin-lock" : "lock-free");
1923 vec_foreach_index (ci, vui->per_cpu_tx_qid)
1925 vlib_cli_output (vm, " thread %d on vring %d\n", ci,
1926 VHOST_VRING_IDX_RX (vui->per_cpu_tx_qid[ci]));
1929 vlib_cli_output (vm, "\n");
1931 vlib_cli_output (vm, " Memory regions (total %d)\n", vui->nregions);
1935 vlib_cli_output (vm,
1936 " region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr\n");
1937 vlib_cli_output (vm,
1938 " ====== ===== ================== ================== ================== ================== ==================\n");
1940 for (j = 0; j < vui->nregions; j++)
1942 vlib_cli_output (vm,
1943 " %d %-5d 0x%016lx 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",
1944 j, vui->region_mmap_fd[j],
1945 vui->regions[j].guest_phys_addr,
1946 vui->regions[j].memory_size,
1947 vui->regions[j].userspace_addr,
1948 vui->regions[j].mmap_offset,
1949 pointer_to_uword (vui->region_mmap_addr[j]));
1951 for (q = 0; q < VHOST_VRING_MAX_N; q++)
1953 if (!vui->vrings[q].started)
1956 vlib_cli_output (vm, "\n Virtqueue %d (%s%s)\n", q,
1957 (q & 1) ? "RX" : "TX",
1958 vui->vrings[q].enabled ? "" : " disabled");
1960 vlib_cli_output (vm,
1961 " qsz %d last_avail_idx %d last_used_idx %d\n",
1962 vui->vrings[q].qsz_mask + 1,
1963 vui->vrings[q].last_avail_idx,
1964 vui->vrings[q].last_used_idx);
1966 if (vui->vrings[q].avail && vui->vrings[q].used)
1967 vlib_cli_output (vm,
1968 " avail.flags %x avail.idx %d used.flags %x used.idx %d\n",
1969 vui->vrings[q].avail->flags,
1970 vui->vrings[q].avail->idx,
1971 vui->vrings[q].used->flags,
1972 vui->vrings[q].used->idx);
1974 int kickfd = UNIX_GET_FD (vui->vrings[q].kickfd_idx);
1975 int callfd = UNIX_GET_FD (vui->vrings[q].callfd_idx);
1976 vlib_cli_output (vm, " kickfd %d callfd %d errfd %d\n",
1977 kickfd, callfd, vui->vrings[q].errfd);
1981 vlib_cli_output (vm, "\n descriptor table:\n");
1982 vlib_cli_output (vm,
1983 " id addr len flags next user_addr\n");
1984 vlib_cli_output (vm,
1985 " ===== ================== ===== ====== ===== ==================\n");
1986 for (j = 0; j < vui->vrings[q].qsz_mask + 1; j++)
1989 vlib_cli_output (vm,
1990 " %-5d 0x%016lx %-5d 0x%04x %-5d 0x%016lx\n",
1991 j, vui->vrings[q].desc[j].addr,
1992 vui->vrings[q].desc[j].len,
1993 vui->vrings[q].desc[j].flags,
1994 vui->vrings[q].desc[j].next,
1995 pointer_to_uword (map_guest_mem
1997 vui->vrings[q].desc[j].
2002 vlib_cli_output (vm, "\n");
2005 vec_free (hw_if_indices);
2014 * Create a vHost User interface. Once created, a new virtual interface
2015 * will exist with the name '<em>VirtualEthernet0/0/x</em>', where '<em>x</em>'
2016 * is the next free index.
2018 * There are several parameters associated with a vHost interface:
2020 * - <b>socket <socket-filename></b> - Name of the linux socket used by hypervisor
2021 * and VPP to manage the vHost interface. If in '<em>server</em>' mode, VPP will
2022 * create the socket if it does not already exist. If in '<em>client</em>' mode,
2023 * hypervisor will create the socket if it does not already exist. The VPP code
2024 * is indifferent to the file location. However, if SELinux is enabled, then the
2025 * socket needs to be created in '<em>/var/run/vpp/</em>'.
2027 * - <b>server</b> - Optional flag to indicate that VPP should be the server for
2028 * the linux socket. If not provided, VPP will be the client. In '<em>server</em>'
2029 * mode, the VM can be reset without tearing down the vHost Interface. In
2030 * '<em>client</em>' mode, VPP can be reset without bringing down the VM and
2031 * tearing down the vHost Interface.
2033 * - <b>feature-mask <hex></b> - Optional virtio/vhost feature set negotiated at
2034 * startup. <b>This is intended for degugging only.</b> It is recommended that this
2035 * parameter not be used except by experienced users. By default, all supported
2036 * features will be advertised. Otherwise, provide the set of features desired.
2037 * - 0x000008000 (15) - VIRTIO_NET_F_MRG_RXBUF
2038 * - 0x000020000 (17) - VIRTIO_NET_F_CTRL_VQ
2039 * - 0x000200000 (21) - VIRTIO_NET_F_GUEST_ANNOUNCE
2040 * - 0x000400000 (22) - VIRTIO_NET_F_MQ
2041 * - 0x004000000 (26) - VHOST_F_LOG_ALL
2042 * - 0x008000000 (27) - VIRTIO_F_ANY_LAYOUT
2043 * - 0x010000000 (28) - VIRTIO_F_INDIRECT_DESC
2044 * - 0x040000000 (30) - VHOST_USER_F_PROTOCOL_FEATURES
2045 * - 0x100000000 (32) - VIRTIO_F_VERSION_1
2047 * - <b>hwaddr <mac-addr></b> - Optional ethernet address, can be in either
2048 * X:X:X:X:X:X unix or X.X.X cisco format.
2050 * - <b>renumber <dev_instance></b> - Optional parameter which allows the instance
2051 * in the name to be specified. If instance already exists, name will be used
2052 * anyway and multiple instances will have the same name. Use with caution.
2055 * Example of how to create a vhost interface with VPP as the client and all features enabled:
2056 * @cliexstart{create vhost-user socket /var/run/vpp/vhost1.sock}
2057 * VirtualEthernet0/0/0
2059 * Example of how to create a vhost interface with VPP as the server and with just
2060 * multiple queues enabled:
2061 * @cliexstart{create vhost-user socket /var/run/vpp/vhost2.sock server feature-mask 0x40400000}
2062 * VirtualEthernet0/0/1
2064 * Once the vHost interface is created, enable the interface using:
2065 * @cliexcmd{set interface state VirtualEthernet0/0/0 up}
2068 VLIB_CLI_COMMAND (vhost_user_connect_command, static) = {
2069 .path = "create vhost-user",
2070 .short_help = "create vhost-user socket <socket-filename> [server] "
2071 "[feature-mask <hex>] [hwaddr <mac-addr>] [renumber <dev_instance>] [gso]",
2072 .function = vhost_user_connect_command_fn,
2078 * Delete a vHost User interface using the interface name or the
2079 * software interface index. Use the '<em>show interface</em>'
2080 * command to determine the software interface index. On deletion,
2081 * the linux socket will not be deleted.
2084 * Example of how to delete a vhost interface by name:
2085 * @cliexcmd{delete vhost-user VirtualEthernet0/0/1}
2086 * Example of how to delete a vhost interface by software interface index:
2087 * @cliexcmd{delete vhost-user sw_if_index 1}
2090 VLIB_CLI_COMMAND (vhost_user_delete_command, static) = {
2091 .path = "delete vhost-user",
2092 .short_help = "delete vhost-user {<interface> | sw_if_index <sw_idx>}",
2093 .function = vhost_user_delete_command_fn,
2097 * Display the attributes of a single vHost User interface (provide interface
2098 * name), multiple vHost User interfaces (provide a list of interface names seperated
2099 * by spaces) or all Vhost User interfaces (omit an interface name to display all
2100 * vHost interfaces).
2104 * Example of how to display a vhost interface:
2105 * @cliexstart{show vhost-user VirtualEthernet0/0/0}
2106 * Virtio vhost-user interfaces
2108 * coalesce frames 32 time 1e-3
2109 * Interface: VirtualEthernet0/0/0 (ifindex 1)
2110 * virtio_net_hdr_sz 12
2111 * features mask (0xffffffffffffffff):
2112 * features (0x50408000):
2113 * VIRTIO_NET_F_MRG_RXBUF (15)
2114 * VIRTIO_NET_F_MQ (22)
2115 * VIRTIO_F_INDIRECT_DESC (28)
2116 * VHOST_USER_F_PROTOCOL_FEATURES (30)
2117 * protocol features (0x3)
2118 * VHOST_USER_PROTOCOL_F_MQ (0)
2119 * VHOST_USER_PROTOCOL_F_LOG_SHMFD (1)
2121 * socket filename /var/run/vpp/vhost1.sock type client errno "Success"
2124 * thread 1 on vring 1
2125 * thread 1 on vring 5
2126 * thread 2 on vring 3
2127 * thread 2 on vring 7
2128 * tx placement: spin-lock
2129 * thread 0 on vring 0
2130 * thread 1 on vring 2
2131 * thread 2 on vring 0
2133 * Memory regions (total 2)
2134 * region fd guest_phys_addr memory_size userspace_addr mmap_offset mmap_addr
2135 * ====== ===== ================== ================== ================== ================== ==================
2136 * 0 60 0x0000000000000000 0x00000000000a0000 0x00002aaaaac00000 0x0000000000000000 0x00002aab2b400000
2137 * 1 61 0x00000000000c0000 0x000000003ff40000 0x00002aaaaacc0000 0x00000000000c0000 0x00002aababcc0000
2140 * qsz 256 last_avail_idx 0 last_used_idx 0
2141 * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
2142 * kickfd 62 callfd 64 errfd -1
2145 * qsz 256 last_avail_idx 0 last_used_idx 0
2146 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2147 * kickfd 65 callfd 66 errfd -1
2150 * qsz 256 last_avail_idx 0 last_used_idx 0
2151 * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
2152 * kickfd 63 callfd 70 errfd -1
2155 * qsz 256 last_avail_idx 0 last_used_idx 0
2156 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2157 * kickfd 72 callfd 74 errfd -1
2159 * Virtqueue 4 (TX disabled)
2160 * qsz 256 last_avail_idx 0 last_used_idx 0
2161 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2162 * kickfd 76 callfd 78 errfd -1
2164 * Virtqueue 5 (RX disabled)
2165 * qsz 256 last_avail_idx 0 last_used_idx 0
2166 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2167 * kickfd 80 callfd 82 errfd -1
2169 * Virtqueue 6 (TX disabled)
2170 * qsz 256 last_avail_idx 0 last_used_idx 0
2171 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2172 * kickfd 84 callfd 86 errfd -1
2174 * Virtqueue 7 (RX disabled)
2175 * qsz 256 last_avail_idx 0 last_used_idx 0
2176 * avail.flags 1 avail.idx 0 used.flags 1 used.idx 0
2177 * kickfd 88 callfd 90 errfd -1
2181 * The optional '<em>descriptors</em>' parameter will display the same output as
2182 * the previous example but will include the descriptor table for each queue.
2183 * The output is truncated below:
2184 * @cliexstart{show vhost-user VirtualEthernet0/0/0 descriptors}
2185 * Virtio vhost-user interfaces
2187 * coalesce frames 32 time 1e-3
2188 * Interface: VirtualEthernet0/0/0 (ifindex 1)
2189 * virtio_net_hdr_sz 12
2190 * features mask (0xffffffffffffffff):
2191 * features (0x50408000):
2192 * VIRTIO_NET_F_MRG_RXBUF (15)
2193 * VIRTIO_NET_F_MQ (22)
2196 * qsz 256 last_avail_idx 0 last_used_idx 0
2197 * avail.flags 1 avail.idx 128 used.flags 1 used.idx 0
2198 * kickfd 62 callfd 64 errfd -1
2201 * id addr len flags next user_addr
2202 * ===== ================== ===== ====== ===== ==================
2203 * 0 0x0000000010b6e974 2060 0x0002 1 0x00002aabbc76e974
2204 * 1 0x0000000010b6e034 2060 0x0002 2 0x00002aabbc76e034
2205 * 2 0x0000000010b6d6f4 2060 0x0002 3 0x00002aabbc76d6f4
2206 * 3 0x0000000010b6cdb4 2060 0x0002 4 0x00002aabbc76cdb4
2207 * 4 0x0000000010b6c474 2060 0x0002 5 0x00002aabbc76c474
2208 * 5 0x0000000010b6bb34 2060 0x0002 6 0x00002aabbc76bb34
2209 * 6 0x0000000010b6b1f4 2060 0x0002 7 0x00002aabbc76b1f4
2210 * 7 0x0000000010b6a8b4 2060 0x0002 8 0x00002aabbc76a8b4
2211 * 8 0x0000000010b69f74 2060 0x0002 9 0x00002aabbc769f74
2212 * 9 0x0000000010b69634 2060 0x0002 10 0x00002aabbc769634
2213 * 10 0x0000000010b68cf4 2060 0x0002 11 0x00002aabbc768cf4
2215 * 249 0x0000000000000000 0 0x0000 250 0x00002aab2b400000
2216 * 250 0x0000000000000000 0 0x0000 251 0x00002aab2b400000
2217 * 251 0x0000000000000000 0 0x0000 252 0x00002aab2b400000
2218 * 252 0x0000000000000000 0 0x0000 253 0x00002aab2b400000
2219 * 253 0x0000000000000000 0 0x0000 254 0x00002aab2b400000
2220 * 254 0x0000000000000000 0 0x0000 255 0x00002aab2b400000
2221 * 255 0x0000000000000000 0 0x0000 32768 0x00002aab2b400000
2224 * qsz 256 last_avail_idx 0 last_used_idx 0
2230 VLIB_CLI_COMMAND (show_vhost_user_command, static) = {
2231 .path = "show vhost-user",
2232 .short_help = "show vhost-user [<interface> [<interface> [..]]] [descriptors]",
2233 .function = show_vhost_user_command_fn,
2238 static clib_error_t *
2239 vhost_user_config (vlib_main_t * vm, unformat_input_t * input)
2241 vhost_user_main_t *vum = &vhost_user_main;
2243 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
2245 if (unformat (input, "coalesce-frames %d", &vum->coalesce_frames))
2247 else if (unformat (input, "coalesce-time %f", &vum->coalesce_time))
2249 else if (unformat (input, "dont-dump-memory"))
2250 vum->dont_dump_vhost_user_memory = 1;
2252 return clib_error_return (0, "unknown input `%U'",
2253 format_unformat_error, input);
2259 /* vhost-user { ... } configuration. */
2260 VLIB_CONFIG_FUNCTION (vhost_user_config, "vhost-user");
2263 vhost_user_unmap_all (void)
2265 vhost_user_main_t *vum = &vhost_user_main;
2266 vhost_user_intf_t *vui;
2268 if (vum->dont_dump_vhost_user_memory)
2270 pool_foreach (vui, vum->vhost_user_interfaces,
2271 unmap_all_mem_regions (vui);
2277 * fd.io coding-style-patch-verification: ON
2280 * eval: (c-set-style "gnu")