1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
7 * The vhost-user protocol connection is an external interface, so it must be
8 * robust against invalid inputs.
10 * This is important because the vhost-user master is only one step removed
11 * from the guest. Malicious guests that have escaped will then launch further
12 * attacks from the vhost-user master.
14 * Even in deployments where guests are trusted, a bug in the vhost-user master
15 * can still cause invalid messages to be sent. Such messages must not
16 * compromise the stability of the DPDK application by causing crashes, memory
17 * corruption, or other problematic behavior.
19 * Do not assume received VhostUserMsg fields contain sensible values!
28 #include <sys/ioctl.h>
30 #include <sys/types.h>
32 #include <sys/syscall.h>
34 #ifdef RTE_LIBRTE_VHOST_NUMA
37 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
38 #include <linux/userfaultfd.h>
40 #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */
41 #include <linux/memfd.h>
42 #define MEMFD_SUPPORTED
45 #include <rte_common.h>
46 #include <rte_malloc.h>
51 #include "vhost_user.h"
53 #define VIRTIO_MIN_MTU 68
54 #define VIRTIO_MAX_MTU 65535
56 #define INFLIGHT_ALIGNMENT 64
57 #define INFLIGHT_VERSION 0x1
59 static const char *vhost_message_str[VHOST_USER_MAX] = {
60 [VHOST_USER_NONE] = "VHOST_USER_NONE",
61 [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
62 [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
63 [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
64 [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
65 [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
66 [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
67 [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
68 [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
69 [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
70 [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
71 [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
72 [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
73 [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
74 [VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR",
75 [VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES",
76 [VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES",
77 [VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
78 [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
79 [VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
80 [VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
81 [VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
82 [VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
83 [VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
84 [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
85 [VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
86 [VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
87 [VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
88 [VHOST_USER_GET_INFLIGHT_FD] = "VHOST_USER_GET_INFLIGHT_FD",
89 [VHOST_USER_SET_INFLIGHT_FD] = "VHOST_USER_SET_INFLIGHT_FD",
90 [VHOST_USER_SET_STATUS] = "VHOST_USER_SET_STATUS",
91 [VHOST_USER_GET_STATUS] = "VHOST_USER_GET_STATUS",
94 static int send_vhost_reply(int sockfd, struct VhostUserMsg *msg);
95 static int read_vhost_message(int sockfd, struct VhostUserMsg *msg);
98 close_msg_fds(struct VhostUserMsg *msg)
102 for (i = 0; i < msg->fd_num; i++) {
103 int fd = msg->fds[i];
114 * Ensure the expected number of FDs is received,
115 * close all FDs and return an error if this is not the case.
118 validate_msg_fds(struct VhostUserMsg *msg, int expected_fds)
120 if (msg->fd_num == expected_fds)
123 VHOST_LOG_CONFIG(ERR,
124 " Expect %d FDs for request %s, received %d\n",
126 vhost_message_str[msg->request.master],
140 ret = fstat(fd, &stat);
141 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
145 free_mem_region(struct virtio_net *dev)
148 struct rte_vhost_mem_region *reg;
150 if (!dev || !dev->mem)
153 for (i = 0; i < dev->mem->nregions; i++) {
154 reg = &dev->mem->regions[i];
155 if (reg->host_user_addr) {
156 munmap(reg->mmap_addr, reg->mmap_size);
163 vhost_backend_cleanup(struct virtio_net *dev)
166 free_mem_region(dev);
171 rte_free(dev->guest_pages);
172 dev->guest_pages = NULL;
175 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
179 if (dev->inflight_info) {
180 if (dev->inflight_info->addr) {
181 munmap(dev->inflight_info->addr,
182 dev->inflight_info->size);
183 dev->inflight_info->addr = NULL;
186 if (dev->inflight_info->fd >= 0) {
187 close(dev->inflight_info->fd);
188 dev->inflight_info->fd = -1;
191 free(dev->inflight_info);
192 dev->inflight_info = NULL;
195 if (dev->slave_req_fd >= 0) {
196 close(dev->slave_req_fd);
197 dev->slave_req_fd = -1;
200 if (dev->postcopy_ufd >= 0) {
201 close(dev->postcopy_ufd);
202 dev->postcopy_ufd = -1;
205 dev->postcopy_listening = 0;
209 vhost_user_notify_queue_state(struct virtio_net *dev, uint16_t index,
212 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
213 struct vhost_virtqueue *vq = dev->virtqueue[index];
215 /* Configure guest notifications on enable */
216 if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF)
217 vhost_enable_guest_notification(dev, vq, vq->notif_enable);
219 if (vdpa_dev && vdpa_dev->ops->set_vring_state)
220 vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
222 if (dev->notify_ops->vring_state_changed)
223 dev->notify_ops->vring_state_changed(dev->vid,
228 * This function just returns success at the moment unless
229 * the device hasn't been initialised.
232 vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
233 struct VhostUserMsg *msg,
234 int main_fd __rte_unused)
236 if (validate_msg_fds(msg, 0) != 0)
237 return RTE_VHOST_MSG_RESULT_ERR;
239 return RTE_VHOST_MSG_RESULT_OK;
243 vhost_user_reset_owner(struct virtio_net **pdev,
244 struct VhostUserMsg *msg,
245 int main_fd __rte_unused)
247 struct virtio_net *dev = *pdev;
249 if (validate_msg_fds(msg, 0) != 0)
250 return RTE_VHOST_MSG_RESULT_ERR;
252 vhost_destroy_device_notify(dev);
254 cleanup_device(dev, 0);
256 return RTE_VHOST_MSG_RESULT_OK;
260 * The features that we support are requested.
263 vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
264 int main_fd __rte_unused)
266 struct virtio_net *dev = *pdev;
267 uint64_t features = 0;
269 if (validate_msg_fds(msg, 0) != 0)
270 return RTE_VHOST_MSG_RESULT_ERR;
272 rte_vhost_driver_get_features(dev->ifname, &features);
274 msg->payload.u64 = features;
275 msg->size = sizeof(msg->payload.u64);
278 return RTE_VHOST_MSG_RESULT_REPLY;
282 * The queue number that we support are requested.
285 vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
286 int main_fd __rte_unused)
288 struct virtio_net *dev = *pdev;
289 uint32_t queue_num = 0;
291 if (validate_msg_fds(msg, 0) != 0)
292 return RTE_VHOST_MSG_RESULT_ERR;
294 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
296 msg->payload.u64 = (uint64_t)queue_num;
297 msg->size = sizeof(msg->payload.u64);
300 return RTE_VHOST_MSG_RESULT_REPLY;
304 * We receive the negotiated features supported by us and the virtio device.
307 vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
308 int main_fd __rte_unused)
310 struct virtio_net *dev = *pdev;
311 uint64_t features = msg->payload.u64;
312 uint64_t vhost_features = 0;
313 struct rte_vdpa_device *vdpa_dev;
315 if (validate_msg_fds(msg, 0) != 0)
316 return RTE_VHOST_MSG_RESULT_ERR;
318 rte_vhost_driver_get_features(dev->ifname, &vhost_features);
319 if (features & ~vhost_features) {
320 VHOST_LOG_CONFIG(ERR,
321 "(%d) received invalid negotiated features.\n",
323 dev->flags |= VIRTIO_DEV_FEATURES_FAILED;
324 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
326 return RTE_VHOST_MSG_RESULT_ERR;
329 if (dev->flags & VIRTIO_DEV_RUNNING) {
330 if (dev->features == features)
331 return RTE_VHOST_MSG_RESULT_OK;
334 * Error out if master tries to change features while device is
335 * in running state. The exception being VHOST_F_LOG_ALL, which
336 * is enabled when the live-migration starts.
338 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
339 VHOST_LOG_CONFIG(ERR,
340 "(%d) features changed while device is running.\n",
342 return RTE_VHOST_MSG_RESULT_ERR;
345 if (dev->notify_ops->features_changed)
346 dev->notify_ops->features_changed(dev->vid, features);
349 dev->features = features;
351 ((1ULL << VIRTIO_NET_F_MRG_RXBUF) |
352 (1ULL << VIRTIO_F_VERSION_1) |
353 (1ULL << VIRTIO_F_RING_PACKED))) {
354 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
356 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
358 VHOST_LOG_CONFIG(INFO,
359 "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
360 VHOST_LOG_CONFIG(DEBUG,
361 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
363 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
364 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
366 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
367 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
369 * Remove all but first queue pair if MQ hasn't been
370 * negotiated. This is safe because the device is not
371 * running at this stage.
373 while (dev->nr_vring > 2) {
374 struct vhost_virtqueue *vq;
376 vq = dev->virtqueue[--dev->nr_vring];
380 dev->virtqueue[dev->nr_vring] = NULL;
382 cleanup_vq_inflight(dev, vq);
387 vdpa_dev = dev->vdpa_dev;
389 vdpa_dev->ops->set_features(dev->vid);
391 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED;
392 return RTE_VHOST_MSG_RESULT_OK;
396 * The virtio device sends us the size of the descriptor ring.
399 vhost_user_set_vring_num(struct virtio_net **pdev,
400 struct VhostUserMsg *msg,
401 int main_fd __rte_unused)
403 struct virtio_net *dev = *pdev;
404 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
406 if (validate_msg_fds(msg, 0) != 0)
407 return RTE_VHOST_MSG_RESULT_ERR;
409 vq->size = msg->payload.state.num;
411 /* VIRTIO 1.0, 2.4 Virtqueues says:
413 * Queue Size value is always a power of 2. The maximum Queue Size
416 * VIRTIO 1.1 2.7 Virtqueues says:
418 * Packed virtqueues support up to 2^15 entries each.
420 if (!vq_is_packed(dev)) {
421 if (vq->size & (vq->size - 1)) {
422 VHOST_LOG_CONFIG(ERR,
423 "invalid virtqueue size %u\n", vq->size);
424 return RTE_VHOST_MSG_RESULT_ERR;
428 if (vq->size > 32768) {
429 VHOST_LOG_CONFIG(ERR,
430 "invalid virtqueue size %u\n", vq->size);
431 return RTE_VHOST_MSG_RESULT_ERR;
434 if (vq_is_packed(dev)) {
435 if (vq->shadow_used_packed)
436 rte_free(vq->shadow_used_packed);
437 vq->shadow_used_packed = rte_malloc(NULL,
439 sizeof(struct vring_used_elem_packed),
440 RTE_CACHE_LINE_SIZE);
441 if (!vq->shadow_used_packed) {
442 VHOST_LOG_CONFIG(ERR,
443 "failed to allocate memory for shadow used ring.\n");
444 return RTE_VHOST_MSG_RESULT_ERR;
448 if (vq->shadow_used_split)
449 rte_free(vq->shadow_used_split);
451 vq->shadow_used_split = rte_malloc(NULL,
452 vq->size * sizeof(struct vring_used_elem),
453 RTE_CACHE_LINE_SIZE);
455 if (!vq->shadow_used_split) {
456 VHOST_LOG_CONFIG(ERR,
457 "failed to allocate memory for vq internal data.\n");
458 return RTE_VHOST_MSG_RESULT_ERR;
462 if (vq->batch_copy_elems)
463 rte_free(vq->batch_copy_elems);
464 vq->batch_copy_elems = rte_malloc(NULL,
465 vq->size * sizeof(struct batch_copy_elem),
466 RTE_CACHE_LINE_SIZE);
467 if (!vq->batch_copy_elems) {
468 VHOST_LOG_CONFIG(ERR,
469 "failed to allocate memory for batching copy.\n");
470 return RTE_VHOST_MSG_RESULT_ERR;
473 return RTE_VHOST_MSG_RESULT_OK;
477 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
478 * same numa node as the memory of vring descriptor.
480 #ifdef RTE_LIBRTE_VHOST_NUMA
481 static struct virtio_net*
482 numa_realloc(struct virtio_net *dev, int index)
484 int oldnode, newnode;
485 struct virtio_net *old_dev;
486 struct vhost_virtqueue *old_vq, *vq;
487 struct vring_used_elem *new_shadow_used_split;
488 struct vring_used_elem_packed *new_shadow_used_packed;
489 struct batch_copy_elem *new_batch_copy_elems;
492 if (dev->flags & VIRTIO_DEV_RUNNING)
496 vq = old_vq = dev->virtqueue[index];
498 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
499 MPOL_F_NODE | MPOL_F_ADDR);
501 /* check if we need to reallocate vq */
502 ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
503 MPOL_F_NODE | MPOL_F_ADDR);
505 VHOST_LOG_CONFIG(ERR,
506 "Unable to get vq numa information.\n");
509 if (oldnode != newnode) {
510 VHOST_LOG_CONFIG(INFO,
511 "reallocate vq from %d to %d node\n", oldnode, newnode);
512 vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
516 memcpy(vq, old_vq, sizeof(*vq));
518 if (vq_is_packed(dev)) {
519 new_shadow_used_packed = rte_malloc_socket(NULL,
521 sizeof(struct vring_used_elem_packed),
524 if (new_shadow_used_packed) {
525 rte_free(vq->shadow_used_packed);
526 vq->shadow_used_packed = new_shadow_used_packed;
529 new_shadow_used_split = rte_malloc_socket(NULL,
531 sizeof(struct vring_used_elem),
534 if (new_shadow_used_split) {
535 rte_free(vq->shadow_used_split);
536 vq->shadow_used_split = new_shadow_used_split;
540 new_batch_copy_elems = rte_malloc_socket(NULL,
541 vq->size * sizeof(struct batch_copy_elem),
544 if (new_batch_copy_elems) {
545 rte_free(vq->batch_copy_elems);
546 vq->batch_copy_elems = new_batch_copy_elems;
552 /* check if we need to reallocate dev */
553 ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
554 MPOL_F_NODE | MPOL_F_ADDR);
556 VHOST_LOG_CONFIG(ERR,
557 "Unable to get dev numa information.\n");
560 if (oldnode != newnode) {
561 VHOST_LOG_CONFIG(INFO,
562 "reallocate dev from %d to %d node\n",
564 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
570 memcpy(dev, old_dev, sizeof(*dev));
575 dev->virtqueue[index] = vq;
576 vhost_devices[dev->vid] = dev;
579 vhost_user_iotlb_init(dev, index);
584 static struct virtio_net*
585 numa_realloc(struct virtio_net *dev, int index __rte_unused)
591 /* Converts QEMU virtual address to Vhost virtual address. */
593 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
595 struct rte_vhost_mem_region *r;
598 if (unlikely(!dev || !dev->mem))
601 /* Find the region where the address lives. */
602 for (i = 0; i < dev->mem->nregions; i++) {
603 r = &dev->mem->regions[i];
605 if (qva >= r->guest_user_addr &&
606 qva < r->guest_user_addr + r->size) {
608 if (unlikely(*len > r->guest_user_addr + r->size - qva))
609 *len = r->guest_user_addr + r->size - qva;
611 return qva - r->guest_user_addr +
623 * Converts ring address to Vhost virtual address.
624 * If IOMMU is enabled, the ring address is a guest IO virtual address,
625 * else it is a QEMU virtual address.
628 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
629 uint64_t ra, uint64_t *size)
631 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
634 vhost_user_iotlb_rd_lock(vq);
635 vva = vhost_iova_to_vva(dev, vq, ra,
636 size, VHOST_ACCESS_RW);
637 vhost_user_iotlb_rd_unlock(vq);
642 return qva_to_vva(dev, ra, size);
646 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
650 vhost_user_iotlb_rd_lock(vq);
651 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
652 vhost_user_iotlb_rd_unlock(vq);
657 static struct virtio_net *
658 translate_ring_addresses(struct virtio_net *dev, int vq_index)
660 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
661 struct vhost_vring_addr *addr = &vq->ring_addrs;
662 uint64_t len, expected_len;
664 if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
666 log_addr_to_gpa(dev, vq);
667 if (vq->log_guest_addr == 0) {
668 VHOST_LOG_CONFIG(DEBUG,
669 "(%d) failed to map log_guest_addr.\n",
675 if (vq_is_packed(dev)) {
676 len = sizeof(struct vring_packed_desc) * vq->size;
677 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
678 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
679 if (vq->desc_packed == NULL ||
680 len != sizeof(struct vring_packed_desc) *
682 VHOST_LOG_CONFIG(DEBUG,
683 "(%d) failed to map desc_packed ring.\n",
688 dev = numa_realloc(dev, vq_index);
689 vq = dev->virtqueue[vq_index];
690 addr = &vq->ring_addrs;
692 len = sizeof(struct vring_packed_desc_event);
693 vq->driver_event = (struct vring_packed_desc_event *)
694 (uintptr_t)ring_addr_to_vva(dev,
695 vq, addr->avail_user_addr, &len);
696 if (vq->driver_event == NULL ||
697 len != sizeof(struct vring_packed_desc_event)) {
698 VHOST_LOG_CONFIG(DEBUG,
699 "(%d) failed to find driver area address.\n",
704 len = sizeof(struct vring_packed_desc_event);
705 vq->device_event = (struct vring_packed_desc_event *)
706 (uintptr_t)ring_addr_to_vva(dev,
707 vq, addr->used_user_addr, &len);
708 if (vq->device_event == NULL ||
709 len != sizeof(struct vring_packed_desc_event)) {
710 VHOST_LOG_CONFIG(DEBUG,
711 "(%d) failed to find device area address.\n",
720 /* The addresses are converted from QEMU virtual to Vhost virtual. */
721 if (vq->desc && vq->avail && vq->used)
724 len = sizeof(struct vring_desc) * vq->size;
725 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
726 vq, addr->desc_user_addr, &len);
727 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
728 VHOST_LOG_CONFIG(DEBUG,
729 "(%d) failed to map desc ring.\n",
734 dev = numa_realloc(dev, vq_index);
735 vq = dev->virtqueue[vq_index];
736 addr = &vq->ring_addrs;
738 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
739 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
740 len += sizeof(uint16_t);
742 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
743 vq, addr->avail_user_addr, &len);
744 if (vq->avail == 0 || len != expected_len) {
745 VHOST_LOG_CONFIG(DEBUG,
746 "(%d) failed to map avail ring.\n",
751 len = sizeof(struct vring_used) +
752 sizeof(struct vring_used_elem) * vq->size;
753 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
754 len += sizeof(uint16_t);
756 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
757 vq, addr->used_user_addr, &len);
758 if (vq->used == 0 || len != expected_len) {
759 VHOST_LOG_CONFIG(DEBUG,
760 "(%d) failed to map used ring.\n",
765 if (vq->last_used_idx != vq->used->idx) {
766 VHOST_LOG_CONFIG(WARNING,
767 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
768 "some packets maybe resent for Tx and dropped for Rx\n",
769 vq->last_used_idx, vq->used->idx);
770 vq->last_used_idx = vq->used->idx;
771 vq->last_avail_idx = vq->used->idx;
776 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
778 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
779 dev->vid, vq->avail);
780 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
782 VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
783 dev->vid, vq->log_guest_addr);
789 * The virtio device sends us the desc, used and avail ring addresses.
790 * This function then converts these to our address space.
793 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
794 int main_fd __rte_unused)
796 struct virtio_net *dev = *pdev;
797 struct vhost_virtqueue *vq;
798 struct vhost_vring_addr *addr = &msg->payload.addr;
801 if (validate_msg_fds(msg, 0) != 0)
802 return RTE_VHOST_MSG_RESULT_ERR;
804 if (dev->mem == NULL)
805 return RTE_VHOST_MSG_RESULT_ERR;
807 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
808 vq = dev->virtqueue[msg->payload.addr.index];
810 access_ok = vq->access_ok;
813 * Rings addresses should not be interpreted as long as the ring is not
814 * started and enabled
816 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
818 vring_invalidate(dev, vq);
820 if ((vq->enabled && (dev->features &
821 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
823 dev = translate_ring_addresses(dev, msg->payload.addr.index);
825 return RTE_VHOST_MSG_RESULT_ERR;
830 return RTE_VHOST_MSG_RESULT_OK;
834 * The virtio device sends us the available ring last used index.
837 vhost_user_set_vring_base(struct virtio_net **pdev,
838 struct VhostUserMsg *msg,
839 int main_fd __rte_unused)
841 struct virtio_net *dev = *pdev;
842 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
843 uint64_t val = msg->payload.state.num;
845 if (validate_msg_fds(msg, 0) != 0)
846 return RTE_VHOST_MSG_RESULT_ERR;
848 if (vq_is_packed(dev)) {
850 * Bit[0:14]: avail index
851 * Bit[15]: avail wrap counter
853 vq->last_avail_idx = val & 0x7fff;
854 vq->avail_wrap_counter = !!(val & (0x1 << 15));
856 * Set used index to same value as available one, as
857 * their values should be the same since ring processing
858 * was stopped at get time.
860 vq->last_used_idx = vq->last_avail_idx;
861 vq->used_wrap_counter = vq->avail_wrap_counter;
863 vq->last_used_idx = msg->payload.state.num;
864 vq->last_avail_idx = msg->payload.state.num;
867 return RTE_VHOST_MSG_RESULT_OK;
871 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
872 uint64_t host_phys_addr, uint64_t size)
874 struct guest_page *page, *last_page;
875 struct guest_page *old_pages;
877 if (dev->nr_guest_pages == dev->max_guest_pages) {
878 dev->max_guest_pages *= 2;
879 old_pages = dev->guest_pages;
880 dev->guest_pages = rte_realloc(dev->guest_pages,
881 dev->max_guest_pages * sizeof(*page),
882 RTE_CACHE_LINE_SIZE);
883 if (dev->guest_pages == NULL) {
884 VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
890 if (dev->nr_guest_pages > 0) {
891 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
892 /* merge if the two pages are continuous */
893 if (host_phys_addr == last_page->host_phys_addr +
895 last_page->size += size;
900 page = &dev->guest_pages[dev->nr_guest_pages++];
901 page->guest_phys_addr = guest_phys_addr;
902 page->host_phys_addr = host_phys_addr;
909 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
912 uint64_t reg_size = reg->size;
913 uint64_t host_user_addr = reg->host_user_addr;
914 uint64_t guest_phys_addr = reg->guest_phys_addr;
915 uint64_t host_phys_addr;
918 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
919 size = page_size - (guest_phys_addr & (page_size - 1));
920 size = RTE_MIN(size, reg_size);
922 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
925 host_user_addr += size;
926 guest_phys_addr += size;
929 while (reg_size > 0) {
930 size = RTE_MIN(reg_size, page_size);
931 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
933 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
937 host_user_addr += size;
938 guest_phys_addr += size;
942 /* sort guest page array if over binary search threshold */
943 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
944 qsort((void *)dev->guest_pages, dev->nr_guest_pages,
945 sizeof(struct guest_page), guest_page_addrcmp);
951 #ifdef RTE_LIBRTE_VHOST_DEBUG
952 /* TODO: enable it only in debug mode? */
954 dump_guest_pages(struct virtio_net *dev)
957 struct guest_page *page;
959 for (i = 0; i < dev->nr_guest_pages; i++) {
960 page = &dev->guest_pages[i];
962 VHOST_LOG_CONFIG(INFO,
963 "guest physical page region %u\n"
964 "\t guest_phys_addr: %" PRIx64 "\n"
965 "\t host_phys_addr : %" PRIx64 "\n"
966 "\t size : %" PRIx64 "\n",
968 page->guest_phys_addr,
969 page->host_phys_addr,
974 #define dump_guest_pages(dev)
978 vhost_memory_changed(struct VhostUserMemory *new,
979 struct rte_vhost_memory *old)
983 if (new->nregions != old->nregions)
986 for (i = 0; i < new->nregions; ++i) {
987 VhostUserMemoryRegion *new_r = &new->regions[i];
988 struct rte_vhost_mem_region *old_r = &old->regions[i];
990 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
992 if (new_r->memory_size != old_r->size)
994 if (new_r->userspace_addr != old_r->guest_user_addr)
1001 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1003 vhost_user_postcopy_region_register(struct virtio_net *dev,
1004 struct rte_vhost_mem_region *reg)
1006 struct uffdio_register reg_struct;
1009 * Let's register all the mmap'ed area to ensure
1010 * alignment on page boundary.
1012 reg_struct.range.start = (uint64_t)(uintptr_t)reg->mmap_addr;
1013 reg_struct.range.len = reg->mmap_size;
1014 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1016 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1018 VHOST_LOG_CONFIG(ERR, "Failed to register ufd for region "
1019 "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n",
1020 (uint64_t)reg_struct.range.start,
1021 (uint64_t)reg_struct.range.start +
1022 (uint64_t)reg_struct.range.len - 1,
1028 VHOST_LOG_CONFIG(INFO, "\t userfaultfd registered for range : %" PRIx64 " - %" PRIx64 "\n",
1029 (uint64_t)reg_struct.range.start,
1030 (uint64_t)reg_struct.range.start +
1031 (uint64_t)reg_struct.range.len - 1);
1037 vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused,
1038 struct rte_vhost_mem_region *reg __rte_unused)
1045 vhost_user_postcopy_register(struct virtio_net *dev, int main_fd,
1046 struct VhostUserMsg *msg)
1048 struct VhostUserMemory *memory;
1049 struct rte_vhost_mem_region *reg;
1050 VhostUserMsg ack_msg;
1053 if (!dev->postcopy_listening)
1057 * We haven't a better way right now than sharing
1058 * DPDK's virtual address with Qemu, so that Qemu can
1059 * retrieve the region offset when handling userfaults.
1061 memory = &msg->payload.memory;
1062 for (i = 0; i < memory->nregions; i++) {
1063 reg = &dev->mem->regions[i];
1064 memory->regions[i].userspace_addr = reg->host_user_addr;
1067 /* Send the addresses back to qemu */
1069 send_vhost_reply(main_fd, msg);
1071 /* Wait for qemu to acknolwedge it's got the addresses
1072 * we've got to wait before we're allowed to generate faults.
1074 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1075 VHOST_LOG_CONFIG(ERR,
1076 "Failed to read qemu ack on postcopy set-mem-table\n");
1080 if (validate_msg_fds(&ack_msg, 0) != 0)
1083 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1084 VHOST_LOG_CONFIG(ERR,
1085 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1086 ack_msg.request.master);
1090 /* Now userfault register and we can use the memory */
1091 for (i = 0; i < memory->nregions; i++) {
1092 reg = &dev->mem->regions[i];
1093 if (vhost_user_postcopy_region_register(dev, reg) < 0)
1101 vhost_user_mmap_region(struct virtio_net *dev,
1102 struct rte_vhost_mem_region *region,
1103 uint64_t mmap_offset)
1110 /* Check for memory_size + mmap_offset overflow */
1111 if (mmap_offset >= -region->size) {
1112 VHOST_LOG_CONFIG(ERR,
1113 "mmap_offset (%#"PRIx64") and memory_size "
1114 "(%#"PRIx64") overflow\n",
1115 mmap_offset, region->size);
1119 mmap_size = region->size + mmap_offset;
1121 /* mmap() without flag of MAP_ANONYMOUS, should be called with length
1122 * argument aligned with hugepagesz at older longterm version Linux,
1123 * like 2.6.32 and 3.2.72, or mmap() will fail with EINVAL.
1125 * To avoid failure, make sure in caller to keep length aligned.
1127 alignment = get_blk_size(region->fd);
1128 if (alignment == (uint64_t)-1) {
1129 VHOST_LOG_CONFIG(ERR,
1130 "couldn't get hugepage size through fstat\n");
1133 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1134 if (mmap_size == 0) {
1136 * It could happen if initial mmap_size + alignment overflows
1137 * the sizeof uint64, which could happen if either mmap_size or
1138 * alignment value is wrong.
1140 * mmap() kernel implementation would return an error, but
1141 * better catch it before and provide useful info in the logs.
1143 VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
1144 "or alignment (0x%" PRIx64 ") is invalid\n",
1145 region->size + mmap_offset, alignment);
1149 populate = dev->async_copy ? MAP_POPULATE : 0;
1150 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1151 MAP_SHARED | populate, region->fd, 0);
1153 if (mmap_addr == MAP_FAILED) {
1154 VHOST_LOG_CONFIG(ERR, "mmap failed (%s).\n", strerror(errno));
1158 region->mmap_addr = mmap_addr;
1159 region->mmap_size = mmap_size;
1160 region->host_user_addr = (uint64_t)(uintptr_t)mmap_addr + mmap_offset;
1162 if (dev->async_copy)
1163 if (add_guest_pages(dev, region, alignment) < 0) {
1164 VHOST_LOG_CONFIG(ERR,
1165 "adding guest pages to region failed.\n");
1169 VHOST_LOG_CONFIG(INFO,
1170 "guest memory region size: 0x%" PRIx64 "\n"
1171 "\t guest physical addr: 0x%" PRIx64 "\n"
1172 "\t guest virtual addr: 0x%" PRIx64 "\n"
1173 "\t host virtual addr: 0x%" PRIx64 "\n"
1174 "\t mmap addr : 0x%" PRIx64 "\n"
1175 "\t mmap size : 0x%" PRIx64 "\n"
1176 "\t mmap align: 0x%" PRIx64 "\n"
1177 "\t mmap off : 0x%" PRIx64 "\n",
1179 region->guest_phys_addr,
1180 region->guest_user_addr,
1181 region->host_user_addr,
1182 (uint64_t)(uintptr_t)mmap_addr,
1191 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
1194 struct virtio_net *dev = *pdev;
1195 struct VhostUserMemory *memory = &msg->payload.memory;
1196 struct rte_vhost_mem_region *reg;
1198 uint64_t mmap_offset;
1201 if (validate_msg_fds(msg, memory->nregions) != 0)
1202 return RTE_VHOST_MSG_RESULT_ERR;
1204 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
1205 VHOST_LOG_CONFIG(ERR,
1206 "too many memory regions (%u)\n", memory->nregions);
1210 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
1211 VHOST_LOG_CONFIG(INFO,
1212 "(%d) memory regions not changed\n", dev->vid);
1216 return RTE_VHOST_MSG_RESULT_OK;
1220 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
1221 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
1223 if (vdpa_dev && vdpa_dev->ops->dev_close)
1224 vdpa_dev->ops->dev_close(dev->vid);
1225 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1227 free_mem_region(dev);
1232 /* Flush IOTLB cache as previous HVAs are now invalid */
1233 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
1234 for (i = 0; i < dev->nr_vring; i++)
1235 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
1237 dev->nr_guest_pages = 0;
1238 if (dev->guest_pages == NULL) {
1239 dev->max_guest_pages = 8;
1240 dev->guest_pages = rte_zmalloc(NULL,
1241 dev->max_guest_pages *
1242 sizeof(struct guest_page),
1243 RTE_CACHE_LINE_SIZE);
1244 if (dev->guest_pages == NULL) {
1245 VHOST_LOG_CONFIG(ERR,
1246 "(%d) failed to allocate memory "
1247 "for dev->guest_pages\n",
1253 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
1254 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
1255 if (dev->mem == NULL) {
1256 VHOST_LOG_CONFIG(ERR,
1257 "(%d) failed to allocate memory for dev->mem\n",
1259 goto free_guest_pages;
1262 for (i = 0; i < memory->nregions; i++) {
1263 reg = &dev->mem->regions[i];
1265 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1266 reg->guest_user_addr = memory->regions[i].userspace_addr;
1267 reg->size = memory->regions[i].memory_size;
1268 reg->fd = msg->fds[i];
1271 * Assign invalid file descriptor value to avoid double
1272 * closing on error path.
1276 mmap_offset = memory->regions[i].mmap_offset;
1278 if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) {
1279 VHOST_LOG_CONFIG(ERR, "Failed to mmap region %u\n", i);
1280 goto free_mem_table;
1283 dev->mem->nregions++;
1286 if (vhost_user_postcopy_register(dev, main_fd, msg) < 0)
1287 goto free_mem_table;
1289 for (i = 0; i < dev->nr_vring; i++) {
1290 struct vhost_virtqueue *vq = dev->virtqueue[i];
1295 if (vq->desc || vq->avail || vq->used) {
1297 * If the memory table got updated, the ring addresses
1298 * need to be translated again as virtual addresses have
1301 vring_invalidate(dev, vq);
1303 dev = translate_ring_addresses(dev, i);
1306 goto free_mem_table;
1313 dump_guest_pages(dev);
1315 return RTE_VHOST_MSG_RESULT_OK;
1318 free_mem_region(dev);
1322 rte_free(dev->guest_pages);
1323 dev->guest_pages = NULL;
1326 return RTE_VHOST_MSG_RESULT_ERR;
1330 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1337 if (vq_is_packed(dev))
1338 rings_ok = vq->desc_packed && vq->driver_event &&
1341 rings_ok = vq->desc && vq->avail && vq->used;
1344 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1345 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1349 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u
1352 virtio_is_ready(struct virtio_net *dev)
1354 struct vhost_virtqueue *vq;
1355 uint32_t i, nr_vring = dev->nr_vring;
1357 if (dev->flags & VIRTIO_DEV_READY)
1363 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) {
1364 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
1366 if (dev->nr_vring < nr_vring)
1370 for (i = 0; i < nr_vring; i++) {
1371 vq = dev->virtqueue[i];
1373 if (!vq_is_ready(dev, vq))
1377 /* If supported, ensure the frontend is really done with config */
1378 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
1379 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
1382 dev->flags |= VIRTIO_DEV_READY;
1384 if (!(dev->flags & VIRTIO_DEV_RUNNING))
1385 VHOST_LOG_CONFIG(INFO,
1386 "virtio is now ready for processing.\n");
1391 inflight_mem_alloc(const char *name, size_t size, int *fd)
1395 char fname[20] = "/tmp/memfd-XXXXXX";
1398 #ifdef MEMFD_SUPPORTED
1399 mfd = memfd_create(name, MFD_CLOEXEC);
1404 mfd = mkstemp(fname);
1406 VHOST_LOG_CONFIG(ERR,
1407 "failed to get inflight buffer fd\n");
1414 if (ftruncate(mfd, size) == -1) {
1415 VHOST_LOG_CONFIG(ERR,
1416 "failed to alloc inflight buffer\n");
1421 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
1422 if (ptr == MAP_FAILED) {
1423 VHOST_LOG_CONFIG(ERR,
1424 "failed to mmap inflight buffer\n");
1434 get_pervq_shm_size_split(uint16_t queue_size)
1436 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
1437 queue_size + sizeof(uint64_t) +
1438 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
1442 get_pervq_shm_size_packed(uint16_t queue_size)
1444 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
1445 * queue_size + sizeof(uint64_t) +
1446 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
1447 INFLIGHT_ALIGNMENT);
1451 vhost_user_get_inflight_fd(struct virtio_net **pdev,
1453 int main_fd __rte_unused)
1455 struct rte_vhost_inflight_info_packed *inflight_packed;
1456 uint64_t pervq_inflight_size, mmap_size;
1457 uint16_t num_queues, queue_size;
1458 struct virtio_net *dev = *pdev;
1462 if (msg->size != sizeof(msg->payload.inflight)) {
1463 VHOST_LOG_CONFIG(ERR,
1464 "invalid get_inflight_fd message size is %d\n",
1466 return RTE_VHOST_MSG_RESULT_ERR;
1469 if (dev->inflight_info == NULL) {
1470 dev->inflight_info = calloc(1,
1471 sizeof(struct inflight_mem_info));
1472 if (!dev->inflight_info) {
1473 VHOST_LOG_CONFIG(ERR,
1474 "failed to alloc dev inflight area\n");
1475 return RTE_VHOST_MSG_RESULT_ERR;
1477 dev->inflight_info->fd = -1;
1480 num_queues = msg->payload.inflight.num_queues;
1481 queue_size = msg->payload.inflight.queue_size;
1483 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
1484 msg->payload.inflight.num_queues);
1485 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
1486 msg->payload.inflight.queue_size);
1488 if (vq_is_packed(dev))
1489 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1491 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1493 mmap_size = num_queues * pervq_inflight_size;
1494 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
1496 VHOST_LOG_CONFIG(ERR,
1497 "failed to alloc vhost inflight area\n");
1498 msg->payload.inflight.mmap_size = 0;
1499 return RTE_VHOST_MSG_RESULT_ERR;
1501 memset(addr, 0, mmap_size);
1503 if (dev->inflight_info->addr) {
1504 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1505 dev->inflight_info->addr = NULL;
1508 if (dev->inflight_info->fd >= 0) {
1509 close(dev->inflight_info->fd);
1510 dev->inflight_info->fd = -1;
1513 dev->inflight_info->addr = addr;
1514 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
1515 dev->inflight_info->fd = msg->fds[0] = fd;
1516 msg->payload.inflight.mmap_offset = 0;
1519 if (vq_is_packed(dev)) {
1520 for (i = 0; i < num_queues; i++) {
1522 (struct rte_vhost_inflight_info_packed *)addr;
1523 inflight_packed->used_wrap_counter = 1;
1524 inflight_packed->old_used_wrap_counter = 1;
1525 for (j = 0; j < queue_size; j++)
1526 inflight_packed->desc[j].next = j + 1;
1527 addr = (void *)((char *)addr + pervq_inflight_size);
1531 VHOST_LOG_CONFIG(INFO,
1532 "send inflight mmap_size: %"PRIu64"\n",
1533 msg->payload.inflight.mmap_size);
1534 VHOST_LOG_CONFIG(INFO,
1535 "send inflight mmap_offset: %"PRIu64"\n",
1536 msg->payload.inflight.mmap_offset);
1537 VHOST_LOG_CONFIG(INFO,
1538 "send inflight fd: %d\n", msg->fds[0]);
1540 return RTE_VHOST_MSG_RESULT_REPLY;
1544 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
1545 int main_fd __rte_unused)
1547 uint64_t mmap_size, mmap_offset;
1548 uint16_t num_queues, queue_size;
1549 struct virtio_net *dev = *pdev;
1550 uint32_t pervq_inflight_size;
1551 struct vhost_virtqueue *vq;
1556 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
1557 VHOST_LOG_CONFIG(ERR,
1558 "invalid set_inflight_fd message size is %d,fd is %d\n",
1560 return RTE_VHOST_MSG_RESULT_ERR;
1563 mmap_size = msg->payload.inflight.mmap_size;
1564 mmap_offset = msg->payload.inflight.mmap_offset;
1565 num_queues = msg->payload.inflight.num_queues;
1566 queue_size = msg->payload.inflight.queue_size;
1568 if (vq_is_packed(dev))
1569 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1571 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1573 VHOST_LOG_CONFIG(INFO,
1574 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
1575 VHOST_LOG_CONFIG(INFO,
1576 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
1577 VHOST_LOG_CONFIG(INFO,
1578 "set_inflight_fd num_queues: %u\n", num_queues);
1579 VHOST_LOG_CONFIG(INFO,
1580 "set_inflight_fd queue_size: %u\n", queue_size);
1581 VHOST_LOG_CONFIG(INFO,
1582 "set_inflight_fd fd: %d\n", fd);
1583 VHOST_LOG_CONFIG(INFO,
1584 "set_inflight_fd pervq_inflight_size: %d\n",
1585 pervq_inflight_size);
1587 if (!dev->inflight_info) {
1588 dev->inflight_info = calloc(1,
1589 sizeof(struct inflight_mem_info));
1590 if (dev->inflight_info == NULL) {
1591 VHOST_LOG_CONFIG(ERR,
1592 "failed to alloc dev inflight area\n");
1593 return RTE_VHOST_MSG_RESULT_ERR;
1595 dev->inflight_info->fd = -1;
1598 if (dev->inflight_info->addr) {
1599 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1600 dev->inflight_info->addr = NULL;
1603 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
1605 if (addr == MAP_FAILED) {
1606 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
1607 return RTE_VHOST_MSG_RESULT_ERR;
1610 if (dev->inflight_info->fd >= 0) {
1611 close(dev->inflight_info->fd);
1612 dev->inflight_info->fd = -1;
1615 dev->inflight_info->fd = fd;
1616 dev->inflight_info->addr = addr;
1617 dev->inflight_info->size = mmap_size;
1619 for (i = 0; i < num_queues; i++) {
1620 vq = dev->virtqueue[i];
1624 if (vq_is_packed(dev)) {
1625 vq->inflight_packed = addr;
1626 vq->inflight_packed->desc_num = queue_size;
1628 vq->inflight_split = addr;
1629 vq->inflight_split->desc_num = queue_size;
1631 addr = (void *)((char *)addr + pervq_inflight_size);
1634 return RTE_VHOST_MSG_RESULT_OK;
1638 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1639 int main_fd __rte_unused)
1641 struct virtio_net *dev = *pdev;
1642 struct vhost_vring_file file;
1643 struct vhost_virtqueue *vq;
1646 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1647 if (validate_msg_fds(msg, expected_fds) != 0)
1648 return RTE_VHOST_MSG_RESULT_ERR;
1650 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1651 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1652 file.fd = VIRTIO_INVALID_EVENTFD;
1654 file.fd = msg->fds[0];
1655 VHOST_LOG_CONFIG(INFO,
1656 "vring call idx:%d file:%d\n", file.index, file.fd);
1658 vq = dev->virtqueue[file.index];
1662 vhost_user_notify_queue_state(dev, file.index, 0);
1665 if (vq->callfd >= 0)
1668 vq->callfd = file.fd;
1670 return RTE_VHOST_MSG_RESULT_OK;
1673 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1674 struct VhostUserMsg *msg,
1675 int main_fd __rte_unused)
1679 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1680 if (validate_msg_fds(msg, expected_fds) != 0)
1681 return RTE_VHOST_MSG_RESULT_ERR;
1683 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1685 VHOST_LOG_CONFIG(INFO, "not implemented\n");
1687 return RTE_VHOST_MSG_RESULT_OK;
1691 resubmit_desc_compare(const void *a, const void *b)
1693 const struct rte_vhost_resubmit_desc *desc0 = a;
1694 const struct rte_vhost_resubmit_desc *desc1 = b;
1696 if (desc1->counter > desc0->counter)
1703 vhost_check_queue_inflights_split(struct virtio_net *dev,
1704 struct vhost_virtqueue *vq)
1707 uint16_t resubmit_num = 0, last_io, num;
1708 struct vring_used *used = vq->used;
1709 struct rte_vhost_resubmit_info *resubmit;
1710 struct rte_vhost_inflight_info_split *inflight_split;
1712 if (!(dev->protocol_features &
1713 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1714 return RTE_VHOST_MSG_RESULT_OK;
1716 /* The frontend may still not support the inflight feature
1717 * although we negotiate the protocol feature.
1719 if ((!vq->inflight_split))
1720 return RTE_VHOST_MSG_RESULT_OK;
1722 if (!vq->inflight_split->version) {
1723 vq->inflight_split->version = INFLIGHT_VERSION;
1724 return RTE_VHOST_MSG_RESULT_OK;
1727 if (vq->resubmit_inflight)
1728 return RTE_VHOST_MSG_RESULT_OK;
1730 inflight_split = vq->inflight_split;
1731 vq->global_counter = 0;
1732 last_io = inflight_split->last_inflight_io;
1734 if (inflight_split->used_idx != used->idx) {
1735 inflight_split->desc[last_io].inflight = 0;
1736 rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
1737 inflight_split->used_idx = used->idx;
1740 for (i = 0; i < inflight_split->desc_num; i++) {
1741 if (inflight_split->desc[i].inflight == 1)
1745 vq->last_avail_idx += resubmit_num;
1748 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1750 VHOST_LOG_CONFIG(ERR,
1751 "failed to allocate memory for resubmit info.\n");
1752 return RTE_VHOST_MSG_RESULT_ERR;
1755 resubmit->resubmit_list = calloc(resubmit_num,
1756 sizeof(struct rte_vhost_resubmit_desc));
1757 if (!resubmit->resubmit_list) {
1758 VHOST_LOG_CONFIG(ERR,
1759 "failed to allocate memory for inflight desc.\n");
1761 return RTE_VHOST_MSG_RESULT_ERR;
1765 for (i = 0; i < vq->inflight_split->desc_num; i++) {
1766 if (vq->inflight_split->desc[i].inflight == 1) {
1767 resubmit->resubmit_list[num].index = i;
1768 resubmit->resubmit_list[num].counter =
1769 inflight_split->desc[i].counter;
1773 resubmit->resubmit_num = num;
1775 if (resubmit->resubmit_num > 1)
1776 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1777 sizeof(struct rte_vhost_resubmit_desc),
1778 resubmit_desc_compare);
1780 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1781 vq->resubmit_inflight = resubmit;
1784 return RTE_VHOST_MSG_RESULT_OK;
1788 vhost_check_queue_inflights_packed(struct virtio_net *dev,
1789 struct vhost_virtqueue *vq)
1792 uint16_t resubmit_num = 0, old_used_idx, num;
1793 struct rte_vhost_resubmit_info *resubmit;
1794 struct rte_vhost_inflight_info_packed *inflight_packed;
1796 if (!(dev->protocol_features &
1797 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1798 return RTE_VHOST_MSG_RESULT_OK;
1800 /* The frontend may still not support the inflight feature
1801 * although we negotiate the protocol feature.
1803 if ((!vq->inflight_packed))
1804 return RTE_VHOST_MSG_RESULT_OK;
1806 if (!vq->inflight_packed->version) {
1807 vq->inflight_packed->version = INFLIGHT_VERSION;
1808 return RTE_VHOST_MSG_RESULT_OK;
1811 if (vq->resubmit_inflight)
1812 return RTE_VHOST_MSG_RESULT_OK;
1814 inflight_packed = vq->inflight_packed;
1815 vq->global_counter = 0;
1816 old_used_idx = inflight_packed->old_used_idx;
1818 if (inflight_packed->used_idx != old_used_idx) {
1819 if (inflight_packed->desc[old_used_idx].inflight == 0) {
1820 inflight_packed->old_used_idx =
1821 inflight_packed->used_idx;
1822 inflight_packed->old_used_wrap_counter =
1823 inflight_packed->used_wrap_counter;
1824 inflight_packed->old_free_head =
1825 inflight_packed->free_head;
1827 inflight_packed->used_idx =
1828 inflight_packed->old_used_idx;
1829 inflight_packed->used_wrap_counter =
1830 inflight_packed->old_used_wrap_counter;
1831 inflight_packed->free_head =
1832 inflight_packed->old_free_head;
1836 for (i = 0; i < inflight_packed->desc_num; i++) {
1837 if (inflight_packed->desc[i].inflight == 1)
1842 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1843 if (resubmit == NULL) {
1844 VHOST_LOG_CONFIG(ERR,
1845 "failed to allocate memory for resubmit info.\n");
1846 return RTE_VHOST_MSG_RESULT_ERR;
1849 resubmit->resubmit_list = calloc(resubmit_num,
1850 sizeof(struct rte_vhost_resubmit_desc));
1851 if (resubmit->resubmit_list == NULL) {
1852 VHOST_LOG_CONFIG(ERR,
1853 "failed to allocate memory for resubmit desc.\n");
1855 return RTE_VHOST_MSG_RESULT_ERR;
1859 for (i = 0; i < inflight_packed->desc_num; i++) {
1860 if (vq->inflight_packed->desc[i].inflight == 1) {
1861 resubmit->resubmit_list[num].index = i;
1862 resubmit->resubmit_list[num].counter =
1863 inflight_packed->desc[i].counter;
1867 resubmit->resubmit_num = num;
1869 if (resubmit->resubmit_num > 1)
1870 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1871 sizeof(struct rte_vhost_resubmit_desc),
1872 resubmit_desc_compare);
1874 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1875 vq->resubmit_inflight = resubmit;
1878 return RTE_VHOST_MSG_RESULT_OK;
1882 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1883 int main_fd __rte_unused)
1885 struct virtio_net *dev = *pdev;
1886 struct vhost_vring_file file;
1887 struct vhost_virtqueue *vq;
1890 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1891 if (validate_msg_fds(msg, expected_fds) != 0)
1892 return RTE_VHOST_MSG_RESULT_ERR;
1894 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1895 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1896 file.fd = VIRTIO_INVALID_EVENTFD;
1898 file.fd = msg->fds[0];
1899 VHOST_LOG_CONFIG(INFO,
1900 "vring kick idx:%d file:%d\n", file.index, file.fd);
1902 /* Interpret ring addresses only when ring is started. */
1903 dev = translate_ring_addresses(dev, file.index);
1905 if (file.fd != VIRTIO_INVALID_EVENTFD)
1908 return RTE_VHOST_MSG_RESULT_ERR;
1913 vq = dev->virtqueue[file.index];
1916 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1917 * the ring starts already enabled. Otherwise, it is enabled via
1918 * the SET_VRING_ENABLE message.
1920 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1922 if (dev->notify_ops->vring_state_changed)
1923 dev->notify_ops->vring_state_changed(
1924 dev->vid, file.index, 1);
1929 vhost_user_notify_queue_state(dev, file.index, 0);
1932 if (vq->kickfd >= 0)
1934 vq->kickfd = file.fd;
1936 if (vq_is_packed(dev)) {
1937 if (vhost_check_queue_inflights_packed(dev, vq)) {
1938 VHOST_LOG_CONFIG(ERR,
1939 "failed to inflights for vq: %d\n", file.index);
1940 return RTE_VHOST_MSG_RESULT_ERR;
1943 if (vhost_check_queue_inflights_split(dev, vq)) {
1944 VHOST_LOG_CONFIG(ERR,
1945 "failed to inflights for vq: %d\n", file.index);
1946 return RTE_VHOST_MSG_RESULT_ERR;
1950 return RTE_VHOST_MSG_RESULT_OK;
1954 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1957 vhost_user_get_vring_base(struct virtio_net **pdev,
1958 struct VhostUserMsg *msg,
1959 int main_fd __rte_unused)
1961 struct virtio_net *dev = *pdev;
1962 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1965 if (validate_msg_fds(msg, 0) != 0)
1966 return RTE_VHOST_MSG_RESULT_ERR;
1968 /* We have to stop the queue (virtio) if it is running. */
1969 vhost_destroy_device_notify(dev);
1971 dev->flags &= ~VIRTIO_DEV_READY;
1972 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1974 /* Here we are safe to get the indexes */
1975 if (vq_is_packed(dev)) {
1977 * Bit[0:14]: avail index
1978 * Bit[15]: avail wrap counter
1980 val = vq->last_avail_idx & 0x7fff;
1981 val |= vq->avail_wrap_counter << 15;
1982 msg->payload.state.num = val;
1984 msg->payload.state.num = vq->last_avail_idx;
1987 VHOST_LOG_CONFIG(INFO,
1988 "vring base idx:%d file:%d\n", msg->payload.state.index,
1989 msg->payload.state.num);
1991 * Based on current qemu vhost-user implementation, this message is
1992 * sent and only sent in vhost_vring_stop.
1993 * TODO: cleanup the vring, it isn't usable since here.
1995 if (vq->kickfd >= 0)
1998 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
2000 if (vq->callfd >= 0)
2003 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
2005 vq->signalled_used_valid = false;
2007 if (vq_is_packed(dev)) {
2008 rte_free(vq->shadow_used_packed);
2009 vq->shadow_used_packed = NULL;
2011 rte_free(vq->shadow_used_split);
2012 vq->shadow_used_split = NULL;
2014 if (vq->async_pkts_info)
2015 rte_free(vq->async_pkts_info);
2016 if (vq->async_descs_split)
2017 rte_free(vq->async_descs_split);
2018 vq->async_pkts_info = NULL;
2019 vq->async_descs_split = NULL;
2022 rte_free(vq->batch_copy_elems);
2023 vq->batch_copy_elems = NULL;
2025 msg->size = sizeof(msg->payload.state);
2028 vring_invalidate(dev, vq);
2030 return RTE_VHOST_MSG_RESULT_REPLY;
2034 * when virtio queues are ready to work, qemu will send us to
2035 * enable the virtio queue pair.
2038 vhost_user_set_vring_enable(struct virtio_net **pdev,
2039 struct VhostUserMsg *msg,
2040 int main_fd __rte_unused)
2042 struct virtio_net *dev = *pdev;
2043 int enable = (int)msg->payload.state.num;
2044 int index = (int)msg->payload.state.index;
2046 if (validate_msg_fds(msg, 0) != 0)
2047 return RTE_VHOST_MSG_RESULT_ERR;
2049 VHOST_LOG_CONFIG(INFO,
2050 "set queue enable: %d to qp idx: %d\n",
2053 if (enable && dev->virtqueue[index]->async_registered) {
2054 if (dev->virtqueue[index]->async_pkts_inflight_n) {
2055 VHOST_LOG_CONFIG(ERR, "failed to enable vring. "
2056 "async inflight packets must be completed first\n");
2057 return RTE_VHOST_MSG_RESULT_ERR;
2061 dev->virtqueue[index]->enabled = enable;
2063 return RTE_VHOST_MSG_RESULT_OK;
2067 vhost_user_get_protocol_features(struct virtio_net **pdev,
2068 struct VhostUserMsg *msg,
2069 int main_fd __rte_unused)
2071 struct virtio_net *dev = *pdev;
2072 uint64_t features, protocol_features;
2074 if (validate_msg_fds(msg, 0) != 0)
2075 return RTE_VHOST_MSG_RESULT_ERR;
2077 rte_vhost_driver_get_features(dev->ifname, &features);
2078 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
2080 msg->payload.u64 = protocol_features;
2081 msg->size = sizeof(msg->payload.u64);
2084 return RTE_VHOST_MSG_RESULT_REPLY;
2088 vhost_user_set_protocol_features(struct virtio_net **pdev,
2089 struct VhostUserMsg *msg,
2090 int main_fd __rte_unused)
2092 struct virtio_net *dev = *pdev;
2093 uint64_t protocol_features = msg->payload.u64;
2094 uint64_t slave_protocol_features = 0;
2096 if (validate_msg_fds(msg, 0) != 0)
2097 return RTE_VHOST_MSG_RESULT_ERR;
2099 rte_vhost_driver_get_protocol_features(dev->ifname,
2100 &slave_protocol_features);
2101 if (protocol_features & ~slave_protocol_features) {
2102 VHOST_LOG_CONFIG(ERR,
2103 "(%d) received invalid protocol features.\n",
2105 return RTE_VHOST_MSG_RESULT_ERR;
2108 dev->protocol_features = protocol_features;
2109 VHOST_LOG_CONFIG(INFO,
2110 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
2111 dev->protocol_features);
2113 return RTE_VHOST_MSG_RESULT_OK;
2117 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
2118 int main_fd __rte_unused)
2120 struct virtio_net *dev = *pdev;
2121 int fd = msg->fds[0];
2125 if (validate_msg_fds(msg, 1) != 0)
2126 return RTE_VHOST_MSG_RESULT_ERR;
2129 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
2130 return RTE_VHOST_MSG_RESULT_ERR;
2133 if (msg->size != sizeof(VhostUserLog)) {
2134 VHOST_LOG_CONFIG(ERR,
2135 "invalid log base msg size: %"PRId32" != %d\n",
2136 msg->size, (int)sizeof(VhostUserLog));
2140 size = msg->payload.log.mmap_size;
2141 off = msg->payload.log.mmap_offset;
2143 /* Check for mmap size and offset overflow. */
2145 VHOST_LOG_CONFIG(ERR,
2146 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
2151 VHOST_LOG_CONFIG(INFO,
2152 "log mmap size: %"PRId64", offset: %"PRId64"\n",
2156 * mmap from 0 to workaround a hugepage mmap bug: mmap will
2157 * fail when offset is not page size aligned.
2159 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2161 if (addr == MAP_FAILED) {
2162 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
2163 return RTE_VHOST_MSG_RESULT_ERR;
2167 * Free previously mapped log memory on occasionally
2168 * multiple VHOST_USER_SET_LOG_BASE.
2170 if (dev->log_addr) {
2171 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
2173 dev->log_addr = (uint64_t)(uintptr_t)addr;
2174 dev->log_base = dev->log_addr + off;
2175 dev->log_size = size;
2178 * The spec is not clear about it (yet), but QEMU doesn't expect
2179 * any payload in the reply.
2184 return RTE_VHOST_MSG_RESULT_REPLY;
2188 return RTE_VHOST_MSG_RESULT_ERR;
2191 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
2192 struct VhostUserMsg *msg,
2193 int main_fd __rte_unused)
2195 if (validate_msg_fds(msg, 1) != 0)
2196 return RTE_VHOST_MSG_RESULT_ERR;
2199 VHOST_LOG_CONFIG(INFO, "not implemented.\n");
2201 return RTE_VHOST_MSG_RESULT_OK;
2205 * An rarp packet is constructed and broadcasted to notify switches about
2206 * the new location of the migrated VM, so that packets from outside will
2207 * not be lost after migration.
2209 * However, we don't actually "send" a rarp packet here, instead, we set
2210 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
2213 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
2214 int main_fd __rte_unused)
2216 struct virtio_net *dev = *pdev;
2217 uint8_t *mac = (uint8_t *)&msg->payload.u64;
2218 struct rte_vdpa_device *vdpa_dev;
2220 if (validate_msg_fds(msg, 0) != 0)
2221 return RTE_VHOST_MSG_RESULT_ERR;
2223 VHOST_LOG_CONFIG(DEBUG,
2224 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
2225 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2226 memcpy(dev->mac.addr_bytes, mac, 6);
2229 * Set the flag to inject a RARP broadcast packet at
2230 * rte_vhost_dequeue_burst().
2232 * __ATOMIC_RELEASE ordering is for making sure the mac is
2233 * copied before the flag is set.
2235 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
2236 vdpa_dev = dev->vdpa_dev;
2237 if (vdpa_dev && vdpa_dev->ops->migration_done)
2238 vdpa_dev->ops->migration_done(dev->vid);
2240 return RTE_VHOST_MSG_RESULT_OK;
2244 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
2245 int main_fd __rte_unused)
2247 struct virtio_net *dev = *pdev;
2249 if (validate_msg_fds(msg, 0) != 0)
2250 return RTE_VHOST_MSG_RESULT_ERR;
2252 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
2253 msg->payload.u64 > VIRTIO_MAX_MTU) {
2254 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
2257 return RTE_VHOST_MSG_RESULT_ERR;
2260 dev->mtu = msg->payload.u64;
2262 return RTE_VHOST_MSG_RESULT_OK;
2266 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
2267 int main_fd __rte_unused)
2269 struct virtio_net *dev = *pdev;
2270 int fd = msg->fds[0];
2272 if (validate_msg_fds(msg, 1) != 0)
2273 return RTE_VHOST_MSG_RESULT_ERR;
2276 VHOST_LOG_CONFIG(ERR,
2277 "Invalid file descriptor for slave channel (%d)\n",
2279 return RTE_VHOST_MSG_RESULT_ERR;
2282 if (dev->slave_req_fd >= 0)
2283 close(dev->slave_req_fd);
2285 dev->slave_req_fd = fd;
2287 return RTE_VHOST_MSG_RESULT_OK;
2291 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2293 struct vhost_vring_addr *ra;
2294 uint64_t start, end, len;
2297 end = start + imsg->size;
2299 ra = &vq->ring_addrs;
2300 len = sizeof(struct vring_desc) * vq->size;
2301 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2304 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
2305 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2308 len = sizeof(struct vring_used) +
2309 sizeof(struct vring_used_elem) * vq->size;
2310 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2313 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2314 len = sizeof(uint64_t);
2315 if (ra->log_guest_addr < end &&
2316 (ra->log_guest_addr + len) > start)
2324 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2326 struct vhost_vring_addr *ra;
2327 uint64_t start, end, len;
2330 end = start + imsg->size;
2332 ra = &vq->ring_addrs;
2333 len = sizeof(struct vring_packed_desc) * vq->size;
2334 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2337 len = sizeof(struct vring_packed_desc_event);
2338 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2341 len = sizeof(struct vring_packed_desc_event);
2342 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2345 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2346 len = sizeof(uint64_t);
2347 if (ra->log_guest_addr < end &&
2348 (ra->log_guest_addr + len) > start)
2355 static int is_vring_iotlb(struct virtio_net *dev,
2356 struct vhost_virtqueue *vq,
2357 struct vhost_iotlb_msg *imsg)
2359 if (vq_is_packed(dev))
2360 return is_vring_iotlb_packed(vq, imsg);
2362 return is_vring_iotlb_split(vq, imsg);
2366 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
2367 int main_fd __rte_unused)
2369 struct virtio_net *dev = *pdev;
2370 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
2374 if (validate_msg_fds(msg, 0) != 0)
2375 return RTE_VHOST_MSG_RESULT_ERR;
2377 switch (imsg->type) {
2378 case VHOST_IOTLB_UPDATE:
2380 vva = qva_to_vva(dev, imsg->uaddr, &len);
2382 return RTE_VHOST_MSG_RESULT_ERR;
2384 for (i = 0; i < dev->nr_vring; i++) {
2385 struct vhost_virtqueue *vq = dev->virtqueue[i];
2390 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
2393 if (is_vring_iotlb(dev, vq, imsg))
2394 *pdev = dev = translate_ring_addresses(dev, i);
2397 case VHOST_IOTLB_INVALIDATE:
2398 for (i = 0; i < dev->nr_vring; i++) {
2399 struct vhost_virtqueue *vq = dev->virtqueue[i];
2404 vhost_user_iotlb_cache_remove(vq, imsg->iova,
2407 if (is_vring_iotlb(dev, vq, imsg))
2408 vring_invalidate(dev, vq);
2412 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
2414 return RTE_VHOST_MSG_RESULT_ERR;
2417 return RTE_VHOST_MSG_RESULT_OK;
2421 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
2422 struct VhostUserMsg *msg,
2423 int main_fd __rte_unused)
2425 struct virtio_net *dev = *pdev;
2426 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
2427 struct uffdio_api api_struct;
2429 if (validate_msg_fds(msg, 0) != 0)
2430 return RTE_VHOST_MSG_RESULT_ERR;
2432 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
2434 if (dev->postcopy_ufd == -1) {
2435 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
2437 return RTE_VHOST_MSG_RESULT_ERR;
2439 api_struct.api = UFFD_API;
2440 api_struct.features = 0;
2441 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
2442 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
2444 close(dev->postcopy_ufd);
2445 dev->postcopy_ufd = -1;
2446 return RTE_VHOST_MSG_RESULT_ERR;
2448 msg->fds[0] = dev->postcopy_ufd;
2451 return RTE_VHOST_MSG_RESULT_REPLY;
2453 dev->postcopy_ufd = -1;
2456 return RTE_VHOST_MSG_RESULT_ERR;
2461 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
2462 struct VhostUserMsg *msg __rte_unused,
2463 int main_fd __rte_unused)
2465 struct virtio_net *dev = *pdev;
2467 if (validate_msg_fds(msg, 0) != 0)
2468 return RTE_VHOST_MSG_RESULT_ERR;
2470 if (dev->mem && dev->mem->nregions) {
2471 VHOST_LOG_CONFIG(ERR,
2472 "Regions already registered at postcopy-listen\n");
2473 return RTE_VHOST_MSG_RESULT_ERR;
2475 dev->postcopy_listening = 1;
2477 return RTE_VHOST_MSG_RESULT_OK;
2481 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
2482 int main_fd __rte_unused)
2484 struct virtio_net *dev = *pdev;
2486 if (validate_msg_fds(msg, 0) != 0)
2487 return RTE_VHOST_MSG_RESULT_ERR;
2489 dev->postcopy_listening = 0;
2490 if (dev->postcopy_ufd >= 0) {
2491 close(dev->postcopy_ufd);
2492 dev->postcopy_ufd = -1;
2495 msg->payload.u64 = 0;
2496 msg->size = sizeof(msg->payload.u64);
2499 return RTE_VHOST_MSG_RESULT_REPLY;
2503 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2504 int main_fd __rte_unused)
2506 struct virtio_net *dev = *pdev;
2508 if (validate_msg_fds(msg, 0) != 0)
2509 return RTE_VHOST_MSG_RESULT_ERR;
2511 msg->payload.u64 = dev->status;
2512 msg->size = sizeof(msg->payload.u64);
2515 return RTE_VHOST_MSG_RESULT_REPLY;
2519 vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2520 int main_fd __rte_unused)
2522 struct virtio_net *dev = *pdev;
2524 if (validate_msg_fds(msg, 0) != 0)
2525 return RTE_VHOST_MSG_RESULT_ERR;
2527 /* As per Virtio specification, the device status is 8bits long */
2528 if (msg->payload.u64 > UINT8_MAX) {
2529 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
2531 return RTE_VHOST_MSG_RESULT_ERR;
2534 dev->status = msg->payload.u64;
2536 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
2537 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
2538 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
2540 * Clear the bit to let the driver know about the feature
2541 * negotiation failure
2543 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
2546 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
2548 "\t-ACKNOWLEDGE: %u\n"
2550 "\t-FEATURES_OK: %u\n"
2551 "\t-DRIVER_OK: %u\n"
2552 "\t-DEVICE_NEED_RESET: %u\n"
2555 (dev->status == VIRTIO_DEVICE_STATUS_RESET),
2556 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
2557 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
2558 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
2559 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
2560 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
2561 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
2563 return RTE_VHOST_MSG_RESULT_OK;
2566 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
2567 struct VhostUserMsg *msg,
2569 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
2570 [VHOST_USER_NONE] = NULL,
2571 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
2572 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
2573 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
2574 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
2575 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
2576 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
2577 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
2578 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
2579 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
2580 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
2581 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
2582 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
2583 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
2584 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
2585 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
2586 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
2587 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
2588 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
2589 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
2590 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
2591 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
2592 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
2593 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
2594 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
2595 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
2596 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
2597 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
2598 [VHOST_USER_SET_STATUS] = vhost_user_set_status,
2599 [VHOST_USER_GET_STATUS] = vhost_user_get_status,
2602 /* return bytes# of read on success or negative val on failure. */
2604 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
2608 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
2609 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
2612 } else if (ret != VHOST_USER_HDR_SIZE) {
2613 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
2619 if (msg->size > sizeof(msg->payload)) {
2620 VHOST_LOG_CONFIG(ERR,
2621 "invalid msg size: %d\n", msg->size);
2624 ret = read(sockfd, &msg->payload, msg->size);
2627 if (ret != (int)msg->size) {
2628 VHOST_LOG_CONFIG(ERR,
2629 "read control message failed\n");
2638 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
2643 return send_fd_message(sockfd, (char *)msg,
2644 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
2648 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
2653 msg->flags &= ~VHOST_USER_VERSION_MASK;
2654 msg->flags &= ~VHOST_USER_NEED_REPLY;
2655 msg->flags |= VHOST_USER_VERSION;
2656 msg->flags |= VHOST_USER_REPLY_MASK;
2658 return send_vhost_message(sockfd, msg);
2662 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
2666 if (msg->flags & VHOST_USER_NEED_REPLY)
2667 rte_spinlock_lock(&dev->slave_req_lock);
2669 ret = send_vhost_message(dev->slave_req_fd, msg);
2670 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
2671 rte_spinlock_unlock(&dev->slave_req_lock);
2677 * Allocate a queue pair if it hasn't been allocated yet
2680 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
2681 struct VhostUserMsg *msg)
2685 switch (msg->request.master) {
2686 case VHOST_USER_SET_VRING_KICK:
2687 case VHOST_USER_SET_VRING_CALL:
2688 case VHOST_USER_SET_VRING_ERR:
2689 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
2691 case VHOST_USER_SET_VRING_NUM:
2692 case VHOST_USER_SET_VRING_BASE:
2693 case VHOST_USER_SET_VRING_ENABLE:
2694 vring_idx = msg->payload.state.index;
2696 case VHOST_USER_SET_VRING_ADDR:
2697 vring_idx = msg->payload.addr.index;
2703 if (vring_idx >= VHOST_MAX_VRING) {
2704 VHOST_LOG_CONFIG(ERR,
2705 "invalid vring index: %u\n", vring_idx);
2709 if (dev->virtqueue[vring_idx])
2712 return alloc_vring_queue(dev, vring_idx);
2716 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
2719 unsigned int vq_num = 0;
2721 while (vq_num < dev->nr_vring) {
2722 struct vhost_virtqueue *vq = dev->virtqueue[i];
2725 rte_spinlock_lock(&vq->access_lock);
2733 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
2736 unsigned int vq_num = 0;
2738 while (vq_num < dev->nr_vring) {
2739 struct vhost_virtqueue *vq = dev->virtqueue[i];
2742 rte_spinlock_unlock(&vq->access_lock);
2750 vhost_user_msg_handler(int vid, int fd)
2752 struct virtio_net *dev;
2753 struct VhostUserMsg msg;
2754 struct rte_vdpa_device *vdpa_dev;
2756 int unlock_required = 0;
2761 dev = get_device(vid);
2765 if (!dev->notify_ops) {
2766 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2767 if (!dev->notify_ops) {
2768 VHOST_LOG_CONFIG(ERR,
2769 "failed to get callback ops for driver %s\n",
2775 ret = read_vhost_message(fd, &msg);
2778 VHOST_LOG_CONFIG(ERR,
2779 "vhost read message failed\n");
2781 VHOST_LOG_CONFIG(INFO,
2782 "vhost peer closed\n");
2788 request = msg.request.master;
2789 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2790 vhost_message_str[request]) {
2791 if (request != VHOST_USER_IOTLB_MSG)
2792 VHOST_LOG_CONFIG(INFO, "read message %s\n",
2793 vhost_message_str[request]);
2795 VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
2796 vhost_message_str[request]);
2798 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
2801 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2803 VHOST_LOG_CONFIG(ERR,
2804 "failed to alloc queue\n");
2809 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2810 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2811 * and device is destroyed. destroy_device waits for queues to be
2812 * inactive, so it is safe. Otherwise taking the access_lock
2813 * would cause a dead lock.
2816 case VHOST_USER_SET_FEATURES:
2817 case VHOST_USER_SET_PROTOCOL_FEATURES:
2818 case VHOST_USER_SET_OWNER:
2819 case VHOST_USER_SET_MEM_TABLE:
2820 case VHOST_USER_SET_LOG_BASE:
2821 case VHOST_USER_SET_LOG_FD:
2822 case VHOST_USER_SET_VRING_NUM:
2823 case VHOST_USER_SET_VRING_ADDR:
2824 case VHOST_USER_SET_VRING_BASE:
2825 case VHOST_USER_SET_VRING_KICK:
2826 case VHOST_USER_SET_VRING_CALL:
2827 case VHOST_USER_SET_VRING_ERR:
2828 case VHOST_USER_SET_VRING_ENABLE:
2829 case VHOST_USER_SEND_RARP:
2830 case VHOST_USER_NET_SET_MTU:
2831 case VHOST_USER_SET_SLAVE_REQ_FD:
2832 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2833 vhost_user_lock_all_queue_pairs(dev);
2834 unlock_required = 1;
2843 if (dev->extern_ops.pre_msg_handle) {
2844 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2847 case RTE_VHOST_MSG_RESULT_REPLY:
2848 send_vhost_reply(fd, &msg);
2850 case RTE_VHOST_MSG_RESULT_ERR:
2851 case RTE_VHOST_MSG_RESULT_OK:
2853 goto skip_to_post_handle;
2854 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2860 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2861 if (!vhost_message_handlers[request])
2862 goto skip_to_post_handle;
2863 ret = vhost_message_handlers[request](&dev, &msg, fd);
2866 case RTE_VHOST_MSG_RESULT_ERR:
2867 VHOST_LOG_CONFIG(ERR,
2868 "Processing %s failed.\n",
2869 vhost_message_str[request]);
2872 case RTE_VHOST_MSG_RESULT_OK:
2873 VHOST_LOG_CONFIG(DEBUG,
2874 "Processing %s succeeded.\n",
2875 vhost_message_str[request]);
2878 case RTE_VHOST_MSG_RESULT_REPLY:
2879 VHOST_LOG_CONFIG(DEBUG,
2880 "Processing %s succeeded and needs reply.\n",
2881 vhost_message_str[request]);
2882 send_vhost_reply(fd, &msg);
2890 skip_to_post_handle:
2891 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2892 dev->extern_ops.post_msg_handle) {
2893 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2896 case RTE_VHOST_MSG_RESULT_REPLY:
2897 send_vhost_reply(fd, &msg);
2899 case RTE_VHOST_MSG_RESULT_ERR:
2900 case RTE_VHOST_MSG_RESULT_OK:
2902 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2908 if (unlock_required)
2909 vhost_user_unlock_all_queue_pairs(dev);
2911 /* If message was not handled at this stage, treat it as an error */
2913 VHOST_LOG_CONFIG(ERR,
2914 "vhost message (req: %d) was not handled.\n", request);
2915 close_msg_fds(&msg);
2916 ret = RTE_VHOST_MSG_RESULT_ERR;
2920 * If the request required a reply that was already sent,
2921 * this optional reply-ack won't be sent as the
2922 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2924 if (msg.flags & VHOST_USER_NEED_REPLY) {
2925 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2926 msg.size = sizeof(msg.payload.u64);
2928 send_vhost_reply(fd, &msg);
2929 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2930 VHOST_LOG_CONFIG(ERR,
2931 "vhost message handling failed.\n");
2935 for (i = 0; i < dev->nr_vring; i++) {
2936 struct vhost_virtqueue *vq = dev->virtqueue[i];
2937 bool cur_ready = vq_is_ready(dev, vq);
2939 if (cur_ready != (vq && vq->ready)) {
2940 vq->ready = cur_ready;
2941 vhost_user_notify_queue_state(dev, i, cur_ready);
2946 if (!virtio_is_ready(dev))
2950 * Virtio is now ready. If not done already, it is time
2951 * to notify the application it can process the rings and
2952 * configure the vDPA device if present.
2955 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
2956 if (dev->notify_ops->new_device(dev->vid) == 0)
2957 dev->flags |= VIRTIO_DEV_RUNNING;
2960 vdpa_dev = dev->vdpa_dev;
2964 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2965 if (vdpa_dev->ops->dev_conf(dev->vid))
2966 VHOST_LOG_CONFIG(ERR,
2967 "Failed to configure vDPA device\n");
2969 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
2976 static int process_slave_message_reply(struct virtio_net *dev,
2977 const struct VhostUserMsg *msg)
2979 struct VhostUserMsg msg_reply;
2982 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
2985 ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
2988 VHOST_LOG_CONFIG(ERR,
2989 "vhost read slave message reply failed\n");
2991 VHOST_LOG_CONFIG(INFO,
2992 "vhost peer closed\n");
2998 if (msg_reply.request.slave != msg->request.slave) {
2999 VHOST_LOG_CONFIG(ERR,
3000 "Received unexpected msg type (%u), expected %u\n",
3001 msg_reply.request.slave, msg->request.slave);
3006 ret = msg_reply.payload.u64 ? -1 : 0;
3009 rte_spinlock_unlock(&dev->slave_req_lock);
3014 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
3017 struct VhostUserMsg msg = {
3018 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
3019 .flags = VHOST_USER_VERSION,
3020 .size = sizeof(msg.payload.iotlb),
3024 .type = VHOST_IOTLB_MISS,
3028 ret = send_vhost_message(dev->slave_req_fd, &msg);
3030 VHOST_LOG_CONFIG(ERR,
3031 "Failed to send IOTLB miss message (%d)\n",
3040 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
3043 struct VhostUserMsg msg = {
3044 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
3045 .flags = VHOST_USER_VERSION,
3050 msg.flags |= VHOST_USER_NEED_REPLY;
3052 ret = send_vhost_slave_message(dev, &msg);
3054 VHOST_LOG_CONFIG(ERR,
3055 "Failed to send config change (%d)\n",
3060 return process_slave_message_reply(dev, &msg);
3064 rte_vhost_slave_config_change(int vid, bool need_reply)
3066 struct virtio_net *dev;
3068 dev = get_device(vid);
3072 return vhost_user_slave_config_change(dev, need_reply);
3075 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
3081 struct VhostUserMsg msg = {
3082 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
3083 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
3084 .size = sizeof(msg.payload.area),
3086 .u64 = index & VHOST_USER_VRING_IDX_MASK,
3093 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
3099 ret = send_vhost_slave_message(dev, &msg);
3101 VHOST_LOG_CONFIG(ERR,
3102 "Failed to set host notifier (%d)\n", ret);
3106 return process_slave_message_reply(dev, &msg);
3109 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
3111 struct virtio_net *dev;
3112 struct rte_vdpa_device *vdpa_dev;
3113 int vfio_device_fd, ret = 0;
3114 uint64_t offset, size;
3115 unsigned int i, q_start, q_last;
3117 dev = get_device(vid);
3121 vdpa_dev = dev->vdpa_dev;
3122 if (vdpa_dev == NULL)
3125 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
3126 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
3127 !(dev->protocol_features &
3128 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
3129 !(dev->protocol_features &
3130 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
3131 !(dev->protocol_features &
3132 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
3135 if (qid == RTE_VHOST_QUEUE_ALL) {
3137 q_last = dev->nr_vring - 1;
3139 if (qid >= dev->nr_vring)
3145 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
3146 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
3148 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
3149 if (vfio_device_fd < 0)
3153 for (i = q_start; i <= q_last; i++) {
3154 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
3160 if (vhost_user_slave_set_vring_host_notifier(dev, i,
3161 vfio_device_fd, offset, size) < 0) {
3168 for (i = q_start; i <= q_last; i++) {
3169 vhost_user_slave_set_vring_host_notifier(dev, i, -1,