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>
41 #include <rte_common.h>
42 #include <rte_malloc.h>
47 #include "vhost_user.h"
49 #define VIRTIO_MIN_MTU 68
50 #define VIRTIO_MAX_MTU 65535
52 static const char *vhost_message_str[VHOST_USER_MAX] = {
53 [VHOST_USER_NONE] = "VHOST_USER_NONE",
54 [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
55 [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
56 [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
57 [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
58 [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
59 [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
60 [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
61 [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
62 [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
63 [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
64 [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
65 [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
66 [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
67 [VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR",
68 [VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES",
69 [VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES",
70 [VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
71 [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
72 [VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
73 [VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
74 [VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
75 [VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
76 [VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
77 [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
78 [VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
79 [VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
80 [VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
83 static int send_vhost_reply(int sockfd, struct VhostUserMsg *msg);
84 static int read_vhost_message(int sockfd, struct VhostUserMsg *msg);
92 ret = fstat(fd, &stat);
93 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
97 * Reclaim all the outstanding zmbufs for a virtqueue.
100 drain_zmbuf_list(struct vhost_virtqueue *vq)
102 struct zcopy_mbuf *zmbuf, *next;
104 for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
105 zmbuf != NULL; zmbuf = next) {
106 next = TAILQ_NEXT(zmbuf, next);
108 while (!mbuf_is_consumed(zmbuf->mbuf))
111 TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
112 restore_mbuf(zmbuf->mbuf);
113 rte_pktmbuf_free(zmbuf->mbuf);
120 free_mem_region(struct virtio_net *dev)
123 struct rte_vhost_mem_region *reg;
124 struct vhost_virtqueue *vq;
126 if (!dev || !dev->mem)
129 if (dev->dequeue_zero_copy) {
130 for (i = 0; i < dev->nr_vring; i++) {
131 vq = dev->virtqueue[i];
133 drain_zmbuf_list(vq);
137 for (i = 0; i < dev->mem->nregions; i++) {
138 reg = &dev->mem->regions[i];
139 if (reg->host_user_addr) {
140 munmap(reg->mmap_addr, reg->mmap_size);
147 vhost_backend_cleanup(struct virtio_net *dev)
150 free_mem_region(dev);
155 free(dev->guest_pages);
156 dev->guest_pages = NULL;
159 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
163 if (dev->slave_req_fd >= 0) {
164 close(dev->slave_req_fd);
165 dev->slave_req_fd = -1;
168 if (dev->postcopy_ufd >= 0) {
169 close(dev->postcopy_ufd);
170 dev->postcopy_ufd = -1;
173 dev->postcopy_listening = 0;
177 * This function just returns success at the moment unless
178 * the device hasn't been initialised.
181 vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
182 struct VhostUserMsg *msg __rte_unused,
183 int main_fd __rte_unused)
185 return RTE_VHOST_MSG_RESULT_OK;
189 vhost_user_reset_owner(struct virtio_net **pdev,
190 struct VhostUserMsg *msg __rte_unused,
191 int main_fd __rte_unused)
193 struct virtio_net *dev = *pdev;
194 vhost_destroy_device_notify(dev);
196 cleanup_device(dev, 0);
198 return RTE_VHOST_MSG_RESULT_OK;
202 * The features that we support are requested.
205 vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
206 int main_fd __rte_unused)
208 struct virtio_net *dev = *pdev;
209 uint64_t features = 0;
211 rte_vhost_driver_get_features(dev->ifname, &features);
213 msg->payload.u64 = features;
214 msg->size = sizeof(msg->payload.u64);
217 return RTE_VHOST_MSG_RESULT_REPLY;
221 * The queue number that we support are requested.
224 vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
225 int main_fd __rte_unused)
227 struct virtio_net *dev = *pdev;
228 uint32_t queue_num = 0;
230 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
232 msg->payload.u64 = (uint64_t)queue_num;
233 msg->size = sizeof(msg->payload.u64);
236 return RTE_VHOST_MSG_RESULT_REPLY;
240 * We receive the negotiated features supported by us and the virtio device.
243 vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
244 int main_fd __rte_unused)
246 struct virtio_net *dev = *pdev;
247 uint64_t features = msg->payload.u64;
248 uint64_t vhost_features = 0;
249 struct rte_vdpa_device *vdpa_dev;
252 rte_vhost_driver_get_features(dev->ifname, &vhost_features);
253 if (features & ~vhost_features) {
254 RTE_LOG(ERR, VHOST_CONFIG,
255 "(%d) received invalid negotiated features.\n",
257 return RTE_VHOST_MSG_RESULT_ERR;
260 if (dev->flags & VIRTIO_DEV_RUNNING) {
261 if (dev->features == features)
262 return RTE_VHOST_MSG_RESULT_OK;
265 * Error out if master tries to change features while device is
266 * in running state. The exception being VHOST_F_LOG_ALL, which
267 * is enabled when the live-migration starts.
269 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
270 RTE_LOG(ERR, VHOST_CONFIG,
271 "(%d) features changed while device is running.\n",
273 return RTE_VHOST_MSG_RESULT_ERR;
276 if (dev->notify_ops->features_changed)
277 dev->notify_ops->features_changed(dev->vid, features);
280 dev->features = features;
282 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
283 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
285 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
287 RTE_LOG(INFO, VHOST_CONFIG,
288 "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
289 VHOST_LOG_DEBUG(VHOST_CONFIG,
290 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
292 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
293 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
295 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
296 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
298 * Remove all but first queue pair if MQ hasn't been
299 * negotiated. This is safe because the device is not
300 * running at this stage.
302 while (dev->nr_vring > 2) {
303 struct vhost_virtqueue *vq;
305 vq = dev->virtqueue[--dev->nr_vring];
309 dev->virtqueue[dev->nr_vring] = NULL;
315 did = dev->vdpa_dev_id;
316 vdpa_dev = rte_vdpa_get_device(did);
317 if (vdpa_dev && vdpa_dev->ops->set_features)
318 vdpa_dev->ops->set_features(dev->vid);
320 return RTE_VHOST_MSG_RESULT_OK;
324 * The virtio device sends us the size of the descriptor ring.
327 vhost_user_set_vring_num(struct virtio_net **pdev,
328 struct VhostUserMsg *msg,
329 int main_fd __rte_unused)
331 struct virtio_net *dev = *pdev;
332 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
334 vq->size = msg->payload.state.num;
336 /* VIRTIO 1.0, 2.4 Virtqueues says:
338 * Queue Size value is always a power of 2. The maximum Queue Size
341 if ((vq->size & (vq->size - 1)) || vq->size > 32768) {
342 RTE_LOG(ERR, VHOST_CONFIG,
343 "invalid virtqueue size %u\n", vq->size);
344 return RTE_VHOST_MSG_RESULT_ERR;
347 if (dev->dequeue_zero_copy) {
349 vq->last_zmbuf_idx = 0;
350 vq->zmbuf_size = vq->size;
351 vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
352 sizeof(struct zcopy_mbuf), 0);
353 if (vq->zmbufs == NULL) {
354 RTE_LOG(WARNING, VHOST_CONFIG,
355 "failed to allocate mem for zero copy; "
356 "zero copy is force disabled\n");
357 dev->dequeue_zero_copy = 0;
359 TAILQ_INIT(&vq->zmbuf_list);
362 if (vq_is_packed(dev)) {
363 vq->shadow_used_packed = rte_malloc(NULL,
365 sizeof(struct vring_used_elem_packed),
366 RTE_CACHE_LINE_SIZE);
367 if (!vq->shadow_used_packed) {
368 RTE_LOG(ERR, VHOST_CONFIG,
369 "failed to allocate memory for shadow used ring.\n");
370 return RTE_VHOST_MSG_RESULT_ERR;
374 vq->shadow_used_split = rte_malloc(NULL,
375 vq->size * sizeof(struct vring_used_elem),
376 RTE_CACHE_LINE_SIZE);
377 if (!vq->shadow_used_split) {
378 RTE_LOG(ERR, VHOST_CONFIG,
379 "failed to allocate memory for shadow used ring.\n");
380 return RTE_VHOST_MSG_RESULT_ERR;
384 vq->batch_copy_elems = rte_malloc(NULL,
385 vq->size * sizeof(struct batch_copy_elem),
386 RTE_CACHE_LINE_SIZE);
387 if (!vq->batch_copy_elems) {
388 RTE_LOG(ERR, VHOST_CONFIG,
389 "failed to allocate memory for batching copy.\n");
390 return RTE_VHOST_MSG_RESULT_ERR;
393 return RTE_VHOST_MSG_RESULT_OK;
397 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
398 * same numa node as the memory of vring descriptor.
400 #ifdef RTE_LIBRTE_VHOST_NUMA
401 static struct virtio_net*
402 numa_realloc(struct virtio_net *dev, int index)
404 int oldnode, newnode;
405 struct virtio_net *old_dev;
406 struct vhost_virtqueue *old_vq, *vq;
407 struct zcopy_mbuf *new_zmbuf;
408 struct vring_used_elem *new_shadow_used_split;
409 struct vring_used_elem_packed *new_shadow_used_packed;
410 struct batch_copy_elem *new_batch_copy_elems;
413 if (dev->flags & VIRTIO_DEV_RUNNING)
417 vq = old_vq = dev->virtqueue[index];
419 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
420 MPOL_F_NODE | MPOL_F_ADDR);
422 /* check if we need to reallocate vq */
423 ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
424 MPOL_F_NODE | MPOL_F_ADDR);
426 RTE_LOG(ERR, VHOST_CONFIG,
427 "Unable to get vq numa information.\n");
430 if (oldnode != newnode) {
431 RTE_LOG(INFO, VHOST_CONFIG,
432 "reallocate vq from %d to %d node\n", oldnode, newnode);
433 vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
437 memcpy(vq, old_vq, sizeof(*vq));
438 TAILQ_INIT(&vq->zmbuf_list);
440 if (dev->dequeue_zero_copy) {
441 new_zmbuf = rte_malloc_socket(NULL, vq->zmbuf_size *
442 sizeof(struct zcopy_mbuf), 0, newnode);
444 rte_free(vq->zmbufs);
445 vq->zmbufs = new_zmbuf;
449 if (vq_is_packed(dev)) {
450 new_shadow_used_packed = rte_malloc_socket(NULL,
452 sizeof(struct vring_used_elem_packed),
455 if (new_shadow_used_packed) {
456 rte_free(vq->shadow_used_packed);
457 vq->shadow_used_packed = new_shadow_used_packed;
460 new_shadow_used_split = rte_malloc_socket(NULL,
462 sizeof(struct vring_used_elem),
465 if (new_shadow_used_split) {
466 rte_free(vq->shadow_used_split);
467 vq->shadow_used_split = new_shadow_used_split;
471 new_batch_copy_elems = rte_malloc_socket(NULL,
472 vq->size * sizeof(struct batch_copy_elem),
475 if (new_batch_copy_elems) {
476 rte_free(vq->batch_copy_elems);
477 vq->batch_copy_elems = new_batch_copy_elems;
483 /* check if we need to reallocate dev */
484 ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
485 MPOL_F_NODE | MPOL_F_ADDR);
487 RTE_LOG(ERR, VHOST_CONFIG,
488 "Unable to get dev numa information.\n");
491 if (oldnode != newnode) {
492 RTE_LOG(INFO, VHOST_CONFIG,
493 "reallocate dev from %d to %d node\n",
495 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
501 memcpy(dev, old_dev, sizeof(*dev));
506 dev->virtqueue[index] = vq;
507 vhost_devices[dev->vid] = dev;
510 vhost_user_iotlb_init(dev, index);
515 static struct virtio_net*
516 numa_realloc(struct virtio_net *dev, int index __rte_unused)
522 /* Converts QEMU virtual address to Vhost virtual address. */
524 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
526 struct rte_vhost_mem_region *r;
529 if (unlikely(!dev || !dev->mem))
532 /* Find the region where the address lives. */
533 for (i = 0; i < dev->mem->nregions; i++) {
534 r = &dev->mem->regions[i];
536 if (qva >= r->guest_user_addr &&
537 qva < r->guest_user_addr + r->size) {
539 if (unlikely(*len > r->guest_user_addr + r->size - qva))
540 *len = r->guest_user_addr + r->size - qva;
542 return qva - r->guest_user_addr +
554 * Converts ring address to Vhost virtual address.
555 * If IOMMU is enabled, the ring address is a guest IO virtual address,
556 * else it is a QEMU virtual address.
559 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
560 uint64_t ra, uint64_t *size)
562 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
564 uint64_t req_size = *size;
566 vva = vhost_user_iotlb_cache_find(vq, ra,
567 size, VHOST_ACCESS_RW);
568 if (req_size != *size)
569 vhost_user_iotlb_miss(dev, (ra + *size),
575 return qva_to_vva(dev, ra, size);
579 * Converts vring log address to GPA
580 * If IOMMU is enabled, the log address is IOVA
581 * If IOMMU not enabled, the log address is already GPA
584 translate_log_addr(struct virtio_net *dev, struct vhost_virtqueue *vq,
587 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
588 const uint64_t exp_size = sizeof(struct vring_used) +
589 sizeof(struct vring_used_elem) * vq->size;
591 uint64_t size = exp_size;
593 hva = vhost_iova_to_vva(dev, vq, log_addr,
594 &size, VHOST_ACCESS_RW);
595 if (size != exp_size)
598 gpa = hva_to_gpa(dev, hva, exp_size);
600 RTE_LOG(ERR, VHOST_CONFIG,
601 "VQ: Failed to find GPA for log_addr: 0x%" PRIx64 " hva: 0x%" PRIx64 "\n",
611 static struct virtio_net *
612 translate_ring_addresses(struct virtio_net *dev, int vq_index)
614 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
615 struct vhost_vring_addr *addr = &vq->ring_addrs;
616 uint64_t len, expected_len;
618 if (vq_is_packed(dev)) {
619 len = sizeof(struct vring_packed_desc) * vq->size;
620 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
621 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
622 vq->log_guest_addr = 0;
623 if (vq->desc_packed == NULL ||
624 len != sizeof(struct vring_packed_desc) *
626 RTE_LOG(DEBUG, VHOST_CONFIG,
627 "(%d) failed to map desc_packed ring.\n",
632 dev = numa_realloc(dev, vq_index);
633 vq = dev->virtqueue[vq_index];
634 addr = &vq->ring_addrs;
636 len = sizeof(struct vring_packed_desc_event);
637 vq->driver_event = (struct vring_packed_desc_event *)
638 (uintptr_t)ring_addr_to_vva(dev,
639 vq, addr->avail_user_addr, &len);
640 if (vq->driver_event == NULL ||
641 len != sizeof(struct vring_packed_desc_event)) {
642 RTE_LOG(DEBUG, VHOST_CONFIG,
643 "(%d) failed to find driver area address.\n",
648 len = sizeof(struct vring_packed_desc_event);
649 vq->device_event = (struct vring_packed_desc_event *)
650 (uintptr_t)ring_addr_to_vva(dev,
651 vq, addr->used_user_addr, &len);
652 if (vq->device_event == NULL ||
653 len != sizeof(struct vring_packed_desc_event)) {
654 RTE_LOG(DEBUG, VHOST_CONFIG,
655 "(%d) failed to find device area address.\n",
664 /* The addresses are converted from QEMU virtual to Vhost virtual. */
665 if (vq->desc && vq->avail && vq->used)
668 len = sizeof(struct vring_desc) * vq->size;
669 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
670 vq, addr->desc_user_addr, &len);
671 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
672 RTE_LOG(DEBUG, VHOST_CONFIG,
673 "(%d) failed to map desc ring.\n",
678 dev = numa_realloc(dev, vq_index);
679 vq = dev->virtqueue[vq_index];
680 addr = &vq->ring_addrs;
682 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
683 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
684 len += sizeof(uint16_t);
686 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
687 vq, addr->avail_user_addr, &len);
688 if (vq->avail == 0 || len != expected_len) {
689 RTE_LOG(DEBUG, VHOST_CONFIG,
690 "(%d) failed to map avail ring.\n",
695 len = sizeof(struct vring_used) +
696 sizeof(struct vring_used_elem) * vq->size;
697 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
698 len += sizeof(uint16_t);
700 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
701 vq, addr->used_user_addr, &len);
702 if (vq->used == 0 || len != expected_len) {
703 RTE_LOG(DEBUG, VHOST_CONFIG,
704 "(%d) failed to map used ring.\n",
709 if (vq->last_used_idx != vq->used->idx) {
710 RTE_LOG(WARNING, VHOST_CONFIG,
711 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
712 "some packets maybe resent for Tx and dropped for Rx\n",
713 vq->last_used_idx, vq->used->idx);
714 vq->last_used_idx = vq->used->idx;
715 vq->last_avail_idx = vq->used->idx;
719 translate_log_addr(dev, vq, addr->log_guest_addr);
720 if (vq->log_guest_addr == 0) {
721 RTE_LOG(DEBUG, VHOST_CONFIG,
722 "(%d) failed to map log_guest_addr .\n",
728 VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
730 VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
731 dev->vid, vq->avail);
732 VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
734 VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
735 dev->vid, vq->log_guest_addr);
741 * The virtio device sends us the desc, used and avail ring addresses.
742 * This function then converts these to our address space.
745 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
746 int main_fd __rte_unused)
748 struct virtio_net *dev = *pdev;
749 struct vhost_virtqueue *vq;
750 struct vhost_vring_addr *addr = &msg->payload.addr;
753 if (dev->mem == NULL)
754 return RTE_VHOST_MSG_RESULT_ERR;
756 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
757 vq = dev->virtqueue[msg->payload.addr.index];
759 access_ok = vq->access_ok;
762 * Rings addresses should not be interpreted as long as the ring is not
763 * started and enabled
765 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
767 vring_invalidate(dev, vq);
769 if ((vq->enabled && (dev->features &
770 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
772 dev = translate_ring_addresses(dev, msg->payload.addr.index);
774 return RTE_VHOST_MSG_RESULT_ERR;
779 return RTE_VHOST_MSG_RESULT_OK;
783 * The virtio device sends us the available ring last used index.
786 vhost_user_set_vring_base(struct virtio_net **pdev,
787 struct VhostUserMsg *msg,
788 int main_fd __rte_unused)
790 struct virtio_net *dev = *pdev;
791 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
792 uint64_t val = msg->payload.state.num;
794 if (vq_is_packed(dev)) {
796 * Bit[0:14]: avail index
797 * Bit[15]: avail wrap counter
799 vq->last_avail_idx = val & 0x7fff;
800 vq->avail_wrap_counter = !!(val & (0x1 << 15));
802 * Set used index to same value as available one, as
803 * their values should be the same since ring processing
804 * was stopped at get time.
806 vq->last_used_idx = vq->last_avail_idx;
807 vq->used_wrap_counter = vq->avail_wrap_counter;
809 vq->last_used_idx = msg->payload.state.num;
810 vq->last_avail_idx = msg->payload.state.num;
813 return RTE_VHOST_MSG_RESULT_OK;
817 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
818 uint64_t host_phys_addr, uint64_t size)
820 struct guest_page *page, *last_page;
821 struct guest_page *old_pages;
823 if (dev->nr_guest_pages == dev->max_guest_pages) {
824 dev->max_guest_pages *= 2;
825 old_pages = dev->guest_pages;
826 dev->guest_pages = realloc(dev->guest_pages,
827 dev->max_guest_pages * sizeof(*page));
828 if (!dev->guest_pages) {
829 RTE_LOG(ERR, VHOST_CONFIG, "cannot realloc guest_pages\n");
835 if (dev->nr_guest_pages > 0) {
836 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
837 /* merge if the two pages are continuous */
838 if (host_phys_addr == last_page->host_phys_addr +
840 last_page->size += size;
845 page = &dev->guest_pages[dev->nr_guest_pages++];
846 page->guest_phys_addr = guest_phys_addr;
847 page->host_phys_addr = host_phys_addr;
854 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
857 uint64_t reg_size = reg->size;
858 uint64_t host_user_addr = reg->host_user_addr;
859 uint64_t guest_phys_addr = reg->guest_phys_addr;
860 uint64_t host_phys_addr;
863 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
864 size = page_size - (guest_phys_addr & (page_size - 1));
865 size = RTE_MIN(size, reg_size);
867 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
870 host_user_addr += size;
871 guest_phys_addr += size;
874 while (reg_size > 0) {
875 size = RTE_MIN(reg_size, page_size);
876 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
878 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
882 host_user_addr += size;
883 guest_phys_addr += size;
890 #ifdef RTE_LIBRTE_VHOST_DEBUG
891 /* TODO: enable it only in debug mode? */
893 dump_guest_pages(struct virtio_net *dev)
896 struct guest_page *page;
898 for (i = 0; i < dev->nr_guest_pages; i++) {
899 page = &dev->guest_pages[i];
901 RTE_LOG(INFO, VHOST_CONFIG,
902 "guest physical page region %u\n"
903 "\t guest_phys_addr: %" PRIx64 "\n"
904 "\t host_phys_addr : %" PRIx64 "\n"
905 "\t size : %" PRIx64 "\n",
907 page->guest_phys_addr,
908 page->host_phys_addr,
913 #define dump_guest_pages(dev)
917 vhost_memory_changed(struct VhostUserMemory *new,
918 struct rte_vhost_memory *old)
922 if (new->nregions != old->nregions)
925 for (i = 0; i < new->nregions; ++i) {
926 VhostUserMemoryRegion *new_r = &new->regions[i];
927 struct rte_vhost_mem_region *old_r = &old->regions[i];
929 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
931 if (new_r->memory_size != old_r->size)
933 if (new_r->userspace_addr != old_r->guest_user_addr)
941 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
944 struct virtio_net *dev = *pdev;
945 struct VhostUserMemory *memory = &msg->payload.memory;
946 struct rte_vhost_mem_region *reg;
949 uint64_t mmap_offset;
955 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
956 RTE_LOG(ERR, VHOST_CONFIG,
957 "too many memory regions (%u)\n", memory->nregions);
958 return RTE_VHOST_MSG_RESULT_ERR;
961 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
962 RTE_LOG(INFO, VHOST_CONFIG,
963 "(%d) memory regions not changed\n", dev->vid);
965 for (i = 0; i < memory->nregions; i++)
968 return RTE_VHOST_MSG_RESULT_OK;
972 free_mem_region(dev);
977 /* Flush IOTLB cache as previous HVAs are now invalid */
978 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
979 for (i = 0; i < dev->nr_vring; i++)
980 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
982 dev->nr_guest_pages = 0;
983 if (!dev->guest_pages) {
984 dev->max_guest_pages = 8;
985 dev->guest_pages = malloc(dev->max_guest_pages *
986 sizeof(struct guest_page));
987 if (dev->guest_pages == NULL) {
988 RTE_LOG(ERR, VHOST_CONFIG,
989 "(%d) failed to allocate memory "
990 "for dev->guest_pages\n",
992 return RTE_VHOST_MSG_RESULT_ERR;
996 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
997 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
998 if (dev->mem == NULL) {
999 RTE_LOG(ERR, VHOST_CONFIG,
1000 "(%d) failed to allocate memory for dev->mem\n",
1002 return RTE_VHOST_MSG_RESULT_ERR;
1004 dev->mem->nregions = memory->nregions;
1006 for (i = 0; i < memory->nregions; i++) {
1008 reg = &dev->mem->regions[i];
1010 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1011 reg->guest_user_addr = memory->regions[i].userspace_addr;
1012 reg->size = memory->regions[i].memory_size;
1015 mmap_offset = memory->regions[i].mmap_offset;
1017 /* Check for memory_size + mmap_offset overflow */
1018 if (mmap_offset >= -reg->size) {
1019 RTE_LOG(ERR, VHOST_CONFIG,
1020 "mmap_offset (%#"PRIx64") and memory_size "
1021 "(%#"PRIx64") overflow\n",
1022 mmap_offset, reg->size);
1026 mmap_size = reg->size + mmap_offset;
1028 /* mmap() without flag of MAP_ANONYMOUS, should be called
1029 * with length argument aligned with hugepagesz at older
1030 * longterm version Linux, like 2.6.32 and 3.2.72, or
1031 * mmap() will fail with EINVAL.
1033 * to avoid failure, make sure in caller to keep length
1036 alignment = get_blk_size(fd);
1037 if (alignment == (uint64_t)-1) {
1038 RTE_LOG(ERR, VHOST_CONFIG,
1039 "couldn't get hugepage size through fstat\n");
1042 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1044 populate = (dev->dequeue_zero_copy) ? MAP_POPULATE : 0;
1045 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1046 MAP_SHARED | populate, fd, 0);
1048 if (mmap_addr == MAP_FAILED) {
1049 RTE_LOG(ERR, VHOST_CONFIG,
1050 "mmap region %u failed.\n", i);
1054 reg->mmap_addr = mmap_addr;
1055 reg->mmap_size = mmap_size;
1056 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
1059 if (dev->dequeue_zero_copy)
1060 if (add_guest_pages(dev, reg, alignment) < 0) {
1061 RTE_LOG(ERR, VHOST_CONFIG,
1062 "adding guest pages to region %u failed.\n",
1067 RTE_LOG(INFO, VHOST_CONFIG,
1068 "guest memory region %u, size: 0x%" PRIx64 "\n"
1069 "\t guest physical addr: 0x%" PRIx64 "\n"
1070 "\t guest virtual addr: 0x%" PRIx64 "\n"
1071 "\t host virtual addr: 0x%" PRIx64 "\n"
1072 "\t mmap addr : 0x%" PRIx64 "\n"
1073 "\t mmap size : 0x%" PRIx64 "\n"
1074 "\t mmap align: 0x%" PRIx64 "\n"
1075 "\t mmap off : 0x%" PRIx64 "\n",
1077 reg->guest_phys_addr,
1078 reg->guest_user_addr,
1079 reg->host_user_addr,
1080 (uint64_t)(uintptr_t)mmap_addr,
1085 if (dev->postcopy_listening) {
1087 * We haven't a better way right now than sharing
1088 * DPDK's virtual address with Qemu, so that Qemu can
1089 * retrieve the region offset when handling userfaults.
1091 memory->regions[i].userspace_addr =
1092 reg->host_user_addr;
1095 if (dev->postcopy_listening) {
1096 /* Send the addresses back to qemu */
1098 send_vhost_reply(main_fd, msg);
1100 /* Wait for qemu to acknolwedge it's got the addresses
1101 * we've got to wait before we're allowed to generate faults.
1103 VhostUserMsg ack_msg;
1104 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1105 RTE_LOG(ERR, VHOST_CONFIG,
1106 "Failed to read qemu ack on postcopy set-mem-table\n");
1109 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1110 RTE_LOG(ERR, VHOST_CONFIG,
1111 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1112 ack_msg.request.master);
1116 /* Now userfault register and we can use the memory */
1117 for (i = 0; i < memory->nregions; i++) {
1118 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1119 reg = &dev->mem->regions[i];
1120 struct uffdio_register reg_struct;
1123 * Let's register all the mmap'ed area to ensure
1124 * alignment on page boundary.
1126 reg_struct.range.start =
1127 (uint64_t)(uintptr_t)reg->mmap_addr;
1128 reg_struct.range.len = reg->mmap_size;
1129 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1131 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1133 RTE_LOG(ERR, VHOST_CONFIG,
1134 "Failed to register ufd for region %d: (ufd = %d) %s\n",
1135 i, dev->postcopy_ufd,
1139 RTE_LOG(INFO, VHOST_CONFIG,
1140 "\t userfaultfd registered for range : %llx - %llx\n",
1141 reg_struct.range.start,
1142 reg_struct.range.start +
1143 reg_struct.range.len - 1);
1150 for (i = 0; i < dev->nr_vring; i++) {
1151 struct vhost_virtqueue *vq = dev->virtqueue[i];
1153 if (vq->desc || vq->avail || vq->used) {
1155 * If the memory table got updated, the ring addresses
1156 * need to be translated again as virtual addresses have
1159 vring_invalidate(dev, vq);
1161 dev = translate_ring_addresses(dev, i);
1171 dump_guest_pages(dev);
1173 return RTE_VHOST_MSG_RESULT_OK;
1176 free_mem_region(dev);
1179 return RTE_VHOST_MSG_RESULT_ERR;
1183 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1190 if (vq_is_packed(dev))
1191 rings_ok = !!vq->desc_packed;
1193 rings_ok = vq->desc && vq->avail && vq->used;
1196 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1197 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
1201 virtio_is_ready(struct virtio_net *dev)
1203 struct vhost_virtqueue *vq;
1206 if (dev->nr_vring == 0)
1209 for (i = 0; i < dev->nr_vring; i++) {
1210 vq = dev->virtqueue[i];
1212 if (!vq_is_ready(dev, vq))
1216 RTE_LOG(INFO, VHOST_CONFIG,
1217 "virtio is now ready for processing.\n");
1222 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1223 int main_fd __rte_unused)
1225 struct virtio_net *dev = *pdev;
1226 struct vhost_vring_file file;
1227 struct vhost_virtqueue *vq;
1229 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1230 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1231 file.fd = VIRTIO_INVALID_EVENTFD;
1233 file.fd = msg->fds[0];
1234 RTE_LOG(INFO, VHOST_CONFIG,
1235 "vring call idx:%d file:%d\n", file.index, file.fd);
1237 vq = dev->virtqueue[file.index];
1238 if (vq->callfd >= 0)
1241 vq->callfd = file.fd;
1243 return RTE_VHOST_MSG_RESULT_OK;
1246 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1247 struct VhostUserMsg *msg,
1248 int main_fd __rte_unused)
1250 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1252 RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
1254 return RTE_VHOST_MSG_RESULT_OK;
1258 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1259 int main_fd __rte_unused)
1261 struct virtio_net *dev = *pdev;
1262 struct vhost_vring_file file;
1263 struct vhost_virtqueue *vq;
1265 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1266 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1267 file.fd = VIRTIO_INVALID_EVENTFD;
1269 file.fd = msg->fds[0];
1270 RTE_LOG(INFO, VHOST_CONFIG,
1271 "vring kick idx:%d file:%d\n", file.index, file.fd);
1273 /* Interpret ring addresses only when ring is started. */
1274 dev = translate_ring_addresses(dev, file.index);
1276 return RTE_VHOST_MSG_RESULT_ERR;
1280 vq = dev->virtqueue[file.index];
1283 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1284 * the ring starts already enabled. Otherwise, it is enabled via
1285 * the SET_VRING_ENABLE message.
1287 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1289 if (dev->notify_ops->vring_state_changed)
1290 dev->notify_ops->vring_state_changed(
1291 dev->vid, file.index, 1);
1294 if (vq->kickfd >= 0)
1296 vq->kickfd = file.fd;
1298 return RTE_VHOST_MSG_RESULT_OK;
1302 free_zmbufs(struct vhost_virtqueue *vq)
1304 drain_zmbuf_list(vq);
1306 rte_free(vq->zmbufs);
1310 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1313 vhost_user_get_vring_base(struct virtio_net **pdev,
1314 struct VhostUserMsg *msg,
1315 int main_fd __rte_unused)
1317 struct virtio_net *dev = *pdev;
1318 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1321 /* We have to stop the queue (virtio) if it is running. */
1322 vhost_destroy_device_notify(dev);
1324 dev->flags &= ~VIRTIO_DEV_READY;
1325 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1327 /* Here we are safe to get the indexes */
1328 if (vq_is_packed(dev)) {
1330 * Bit[0:14]: avail index
1331 * Bit[15]: avail wrap counter
1333 val = vq->last_avail_idx & 0x7fff;
1334 val |= vq->avail_wrap_counter << 15;
1335 msg->payload.state.num = val;
1337 msg->payload.state.num = vq->last_avail_idx;
1340 RTE_LOG(INFO, VHOST_CONFIG,
1341 "vring base idx:%d file:%d\n", msg->payload.state.index,
1342 msg->payload.state.num);
1344 * Based on current qemu vhost-user implementation, this message is
1345 * sent and only sent in vhost_vring_stop.
1346 * TODO: cleanup the vring, it isn't usable since here.
1348 if (vq->kickfd >= 0)
1351 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
1353 if (vq->callfd >= 0)
1356 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
1358 vq->signalled_used_valid = false;
1360 if (dev->dequeue_zero_copy)
1362 if (vq_is_packed(dev)) {
1363 rte_free(vq->shadow_used_packed);
1364 vq->shadow_used_packed = NULL;
1366 rte_free(vq->shadow_used_split);
1367 vq->shadow_used_split = NULL;
1370 rte_free(vq->batch_copy_elems);
1371 vq->batch_copy_elems = NULL;
1373 msg->size = sizeof(msg->payload.state);
1376 vring_invalidate(dev, vq);
1378 return RTE_VHOST_MSG_RESULT_REPLY;
1382 * when virtio queues are ready to work, qemu will send us to
1383 * enable the virtio queue pair.
1386 vhost_user_set_vring_enable(struct virtio_net **pdev,
1387 struct VhostUserMsg *msg,
1388 int main_fd __rte_unused)
1390 struct virtio_net *dev = *pdev;
1391 int enable = (int)msg->payload.state.num;
1392 int index = (int)msg->payload.state.index;
1393 struct rte_vdpa_device *vdpa_dev;
1396 RTE_LOG(INFO, VHOST_CONFIG,
1397 "set queue enable: %d to qp idx: %d\n",
1400 did = dev->vdpa_dev_id;
1401 vdpa_dev = rte_vdpa_get_device(did);
1402 if (vdpa_dev && vdpa_dev->ops->set_vring_state)
1403 vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
1405 if (dev->notify_ops->vring_state_changed)
1406 dev->notify_ops->vring_state_changed(dev->vid,
1409 /* On disable, rings have to be stopped being processed. */
1410 if (!enable && dev->dequeue_zero_copy)
1411 drain_zmbuf_list(dev->virtqueue[index]);
1413 dev->virtqueue[index]->enabled = enable;
1415 return RTE_VHOST_MSG_RESULT_OK;
1419 vhost_user_get_protocol_features(struct virtio_net **pdev,
1420 struct VhostUserMsg *msg,
1421 int main_fd __rte_unused)
1423 struct virtio_net *dev = *pdev;
1424 uint64_t features, protocol_features;
1426 rte_vhost_driver_get_features(dev->ifname, &features);
1427 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
1430 * REPLY_ACK protocol feature is only mandatory for now
1431 * for IOMMU feature. If IOMMU is explicitly disabled by the
1432 * application, disable also REPLY_ACK feature for older buggy
1433 * Qemu versions (from v2.7.0 to v2.9.0).
1435 if (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
1436 protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK);
1438 msg->payload.u64 = protocol_features;
1439 msg->size = sizeof(msg->payload.u64);
1442 return RTE_VHOST_MSG_RESULT_REPLY;
1446 vhost_user_set_protocol_features(struct virtio_net **pdev,
1447 struct VhostUserMsg *msg,
1448 int main_fd __rte_unused)
1450 struct virtio_net *dev = *pdev;
1451 uint64_t protocol_features = msg->payload.u64;
1452 uint64_t slave_protocol_features = 0;
1454 rte_vhost_driver_get_protocol_features(dev->ifname,
1455 &slave_protocol_features);
1456 if (protocol_features & ~slave_protocol_features) {
1457 RTE_LOG(ERR, VHOST_CONFIG,
1458 "(%d) received invalid protocol features.\n",
1460 return RTE_VHOST_MSG_RESULT_ERR;
1463 dev->protocol_features = protocol_features;
1464 RTE_LOG(INFO, VHOST_CONFIG,
1465 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
1466 dev->protocol_features);
1468 return RTE_VHOST_MSG_RESULT_OK;
1472 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
1473 int main_fd __rte_unused)
1475 struct virtio_net *dev = *pdev;
1476 int fd = msg->fds[0];
1481 RTE_LOG(ERR, VHOST_CONFIG, "invalid log fd: %d\n", fd);
1482 return RTE_VHOST_MSG_RESULT_ERR;
1485 if (msg->size != sizeof(VhostUserLog)) {
1486 RTE_LOG(ERR, VHOST_CONFIG,
1487 "invalid log base msg size: %"PRId32" != %d\n",
1488 msg->size, (int)sizeof(VhostUserLog));
1489 return RTE_VHOST_MSG_RESULT_ERR;
1492 size = msg->payload.log.mmap_size;
1493 off = msg->payload.log.mmap_offset;
1495 /* Don't allow mmap_offset to point outside the mmap region */
1497 RTE_LOG(ERR, VHOST_CONFIG,
1498 "log offset %#"PRIx64" exceeds log size %#"PRIx64"\n",
1500 return RTE_VHOST_MSG_RESULT_ERR;
1503 RTE_LOG(INFO, VHOST_CONFIG,
1504 "log mmap size: %"PRId64", offset: %"PRId64"\n",
1508 * mmap from 0 to workaround a hugepage mmap bug: mmap will
1509 * fail when offset is not page size aligned.
1511 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
1513 if (addr == MAP_FAILED) {
1514 RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");
1515 return RTE_VHOST_MSG_RESULT_ERR;
1519 * Free previously mapped log memory on occasionally
1520 * multiple VHOST_USER_SET_LOG_BASE.
1522 if (dev->log_addr) {
1523 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
1525 dev->log_addr = (uint64_t)(uintptr_t)addr;
1526 dev->log_base = dev->log_addr + off;
1527 dev->log_size = size;
1530 * The spec is not clear about it (yet), but QEMU doesn't expect
1531 * any payload in the reply.
1536 return RTE_VHOST_MSG_RESULT_REPLY;
1539 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
1540 struct VhostUserMsg *msg,
1541 int main_fd __rte_unused)
1544 RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
1546 return RTE_VHOST_MSG_RESULT_OK;
1550 * An rarp packet is constructed and broadcasted to notify switches about
1551 * the new location of the migrated VM, so that packets from outside will
1552 * not be lost after migration.
1554 * However, we don't actually "send" a rarp packet here, instead, we set
1555 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
1558 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
1559 int main_fd __rte_unused)
1561 struct virtio_net *dev = *pdev;
1562 uint8_t *mac = (uint8_t *)&msg->payload.u64;
1563 struct rte_vdpa_device *vdpa_dev;
1566 RTE_LOG(DEBUG, VHOST_CONFIG,
1567 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
1568 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
1569 memcpy(dev->mac.addr_bytes, mac, 6);
1572 * Set the flag to inject a RARP broadcast packet at
1573 * rte_vhost_dequeue_burst().
1575 * rte_smp_wmb() is for making sure the mac is copied
1576 * before the flag is set.
1579 rte_atomic16_set(&dev->broadcast_rarp, 1);
1580 did = dev->vdpa_dev_id;
1581 vdpa_dev = rte_vdpa_get_device(did);
1582 if (vdpa_dev && vdpa_dev->ops->migration_done)
1583 vdpa_dev->ops->migration_done(dev->vid);
1585 return RTE_VHOST_MSG_RESULT_OK;
1589 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
1590 int main_fd __rte_unused)
1592 struct virtio_net *dev = *pdev;
1593 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
1594 msg->payload.u64 > VIRTIO_MAX_MTU) {
1595 RTE_LOG(ERR, VHOST_CONFIG, "Invalid MTU size (%"PRIu64")\n",
1598 return RTE_VHOST_MSG_RESULT_ERR;
1601 dev->mtu = msg->payload.u64;
1603 return RTE_VHOST_MSG_RESULT_OK;
1607 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
1608 int main_fd __rte_unused)
1610 struct virtio_net *dev = *pdev;
1611 int fd = msg->fds[0];
1614 RTE_LOG(ERR, VHOST_CONFIG,
1615 "Invalid file descriptor for slave channel (%d)\n",
1617 return RTE_VHOST_MSG_RESULT_ERR;
1620 if (dev->slave_req_fd >= 0)
1621 close(dev->slave_req_fd);
1623 dev->slave_req_fd = fd;
1625 return RTE_VHOST_MSG_RESULT_OK;
1629 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
1631 struct vhost_vring_addr *ra;
1632 uint64_t start, end, len;
1635 end = start + imsg->size;
1637 ra = &vq->ring_addrs;
1638 len = sizeof(struct vring_desc) * vq->size;
1639 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
1642 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
1643 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
1646 len = sizeof(struct vring_used) +
1647 sizeof(struct vring_used_elem) * vq->size;
1648 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
1655 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
1657 struct vhost_vring_addr *ra;
1658 uint64_t start, end, len;
1661 end = start + imsg->size;
1663 ra = &vq->ring_addrs;
1664 len = sizeof(struct vring_packed_desc) * vq->size;
1665 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
1668 len = sizeof(struct vring_packed_desc_event);
1669 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
1672 len = sizeof(struct vring_packed_desc_event);
1673 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
1679 static int is_vring_iotlb(struct virtio_net *dev,
1680 struct vhost_virtqueue *vq,
1681 struct vhost_iotlb_msg *imsg)
1683 if (vq_is_packed(dev))
1684 return is_vring_iotlb_packed(vq, imsg);
1686 return is_vring_iotlb_split(vq, imsg);
1690 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
1691 int main_fd __rte_unused)
1693 struct virtio_net *dev = *pdev;
1694 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
1698 switch (imsg->type) {
1699 case VHOST_IOTLB_UPDATE:
1701 vva = qva_to_vva(dev, imsg->uaddr, &len);
1703 return RTE_VHOST_MSG_RESULT_ERR;
1705 for (i = 0; i < dev->nr_vring; i++) {
1706 struct vhost_virtqueue *vq = dev->virtqueue[i];
1708 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
1711 if (is_vring_iotlb(dev, vq, imsg))
1712 *pdev = dev = translate_ring_addresses(dev, i);
1715 case VHOST_IOTLB_INVALIDATE:
1716 for (i = 0; i < dev->nr_vring; i++) {
1717 struct vhost_virtqueue *vq = dev->virtqueue[i];
1719 vhost_user_iotlb_cache_remove(vq, imsg->iova,
1722 if (is_vring_iotlb(dev, vq, imsg))
1723 vring_invalidate(dev, vq);
1727 RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
1729 return RTE_VHOST_MSG_RESULT_ERR;
1732 return RTE_VHOST_MSG_RESULT_OK;
1736 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
1737 struct VhostUserMsg *msg,
1738 int main_fd __rte_unused)
1740 struct virtio_net *dev = *pdev;
1741 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1742 struct uffdio_api api_struct;
1744 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
1746 if (dev->postcopy_ufd == -1) {
1747 RTE_LOG(ERR, VHOST_CONFIG, "Userfaultfd not available: %s\n",
1749 return RTE_VHOST_MSG_RESULT_ERR;
1751 api_struct.api = UFFD_API;
1752 api_struct.features = 0;
1753 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
1754 RTE_LOG(ERR, VHOST_CONFIG, "UFFDIO_API ioctl failure: %s\n",
1756 close(dev->postcopy_ufd);
1757 dev->postcopy_ufd = -1;
1758 return RTE_VHOST_MSG_RESULT_ERR;
1760 msg->fds[0] = dev->postcopy_ufd;
1763 return RTE_VHOST_MSG_RESULT_REPLY;
1765 dev->postcopy_ufd = -1;
1768 return RTE_VHOST_MSG_RESULT_ERR;
1773 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
1774 struct VhostUserMsg *msg __rte_unused,
1775 int main_fd __rte_unused)
1777 struct virtio_net *dev = *pdev;
1779 if (dev->mem && dev->mem->nregions) {
1780 RTE_LOG(ERR, VHOST_CONFIG,
1781 "Regions already registered at postcopy-listen\n");
1782 return RTE_VHOST_MSG_RESULT_ERR;
1784 dev->postcopy_listening = 1;
1786 return RTE_VHOST_MSG_RESULT_OK;
1790 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
1791 int main_fd __rte_unused)
1793 struct virtio_net *dev = *pdev;
1795 dev->postcopy_listening = 0;
1796 if (dev->postcopy_ufd >= 0) {
1797 close(dev->postcopy_ufd);
1798 dev->postcopy_ufd = -1;
1801 msg->payload.u64 = 0;
1802 msg->size = sizeof(msg->payload.u64);
1805 return RTE_VHOST_MSG_RESULT_REPLY;
1808 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
1809 struct VhostUserMsg *msg,
1811 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
1812 [VHOST_USER_NONE] = NULL,
1813 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
1814 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
1815 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
1816 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
1817 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
1818 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
1819 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
1820 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
1821 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
1822 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
1823 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
1824 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
1825 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
1826 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
1827 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
1828 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
1829 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
1830 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
1831 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
1832 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
1833 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
1834 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
1835 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
1836 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
1837 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
1841 /* return bytes# of read on success or negative val on failure. */
1843 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
1847 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
1848 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
1853 if (msg->size > sizeof(msg->payload)) {
1854 RTE_LOG(ERR, VHOST_CONFIG,
1855 "invalid msg size: %d\n", msg->size);
1858 ret = read(sockfd, &msg->payload, msg->size);
1861 if (ret != (int)msg->size) {
1862 RTE_LOG(ERR, VHOST_CONFIG,
1863 "read control message failed\n");
1872 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
1877 return send_fd_message(sockfd, (char *)msg,
1878 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
1882 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
1887 msg->flags &= ~VHOST_USER_VERSION_MASK;
1888 msg->flags &= ~VHOST_USER_NEED_REPLY;
1889 msg->flags |= VHOST_USER_VERSION;
1890 msg->flags |= VHOST_USER_REPLY_MASK;
1892 return send_vhost_message(sockfd, msg);
1896 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
1900 if (msg->flags & VHOST_USER_NEED_REPLY)
1901 rte_spinlock_lock(&dev->slave_req_lock);
1903 ret = send_vhost_message(dev->slave_req_fd, msg);
1904 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
1905 rte_spinlock_unlock(&dev->slave_req_lock);
1911 * Allocate a queue pair if it hasn't been allocated yet
1914 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
1915 struct VhostUserMsg *msg)
1919 switch (msg->request.master) {
1920 case VHOST_USER_SET_VRING_KICK:
1921 case VHOST_USER_SET_VRING_CALL:
1922 case VHOST_USER_SET_VRING_ERR:
1923 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1925 case VHOST_USER_SET_VRING_NUM:
1926 case VHOST_USER_SET_VRING_BASE:
1927 case VHOST_USER_SET_VRING_ENABLE:
1928 vring_idx = msg->payload.state.index;
1930 case VHOST_USER_SET_VRING_ADDR:
1931 vring_idx = msg->payload.addr.index;
1937 if (vring_idx >= VHOST_MAX_VRING) {
1938 RTE_LOG(ERR, VHOST_CONFIG,
1939 "invalid vring index: %u\n", vring_idx);
1943 if (dev->virtqueue[vring_idx])
1946 return alloc_vring_queue(dev, vring_idx);
1950 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
1953 unsigned int vq_num = 0;
1955 while (vq_num < dev->nr_vring) {
1956 struct vhost_virtqueue *vq = dev->virtqueue[i];
1959 rte_spinlock_lock(&vq->access_lock);
1967 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
1970 unsigned int vq_num = 0;
1972 while (vq_num < dev->nr_vring) {
1973 struct vhost_virtqueue *vq = dev->virtqueue[i];
1976 rte_spinlock_unlock(&vq->access_lock);
1984 vhost_user_msg_handler(int vid, int fd)
1986 struct virtio_net *dev;
1987 struct VhostUserMsg msg;
1988 struct rte_vdpa_device *vdpa_dev;
1991 int unlock_required = 0;
1995 dev = get_device(vid);
1999 if (!dev->notify_ops) {
2000 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2001 if (!dev->notify_ops) {
2002 RTE_LOG(ERR, VHOST_CONFIG,
2003 "failed to get callback ops for driver %s\n",
2009 ret = read_vhost_message(fd, &msg);
2012 RTE_LOG(ERR, VHOST_CONFIG,
2013 "vhost read message failed\n");
2015 RTE_LOG(INFO, VHOST_CONFIG,
2016 "vhost peer closed\n");
2022 request = msg.request.master;
2023 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2024 vhost_message_str[request]) {
2025 if (request != VHOST_USER_IOTLB_MSG)
2026 RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
2027 vhost_message_str[request]);
2029 RTE_LOG(DEBUG, VHOST_CONFIG, "read message %s\n",
2030 vhost_message_str[request]);
2032 RTE_LOG(DEBUG, VHOST_CONFIG, "External request %d\n", request);
2035 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2037 RTE_LOG(ERR, VHOST_CONFIG,
2038 "failed to alloc queue\n");
2043 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2044 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2045 * and device is destroyed. destroy_device waits for queues to be
2046 * inactive, so it is safe. Otherwise taking the access_lock
2047 * would cause a dead lock.
2050 case VHOST_USER_SET_FEATURES:
2051 case VHOST_USER_SET_PROTOCOL_FEATURES:
2052 case VHOST_USER_SET_OWNER:
2053 case VHOST_USER_SET_MEM_TABLE:
2054 case VHOST_USER_SET_LOG_BASE:
2055 case VHOST_USER_SET_LOG_FD:
2056 case VHOST_USER_SET_VRING_NUM:
2057 case VHOST_USER_SET_VRING_ADDR:
2058 case VHOST_USER_SET_VRING_BASE:
2059 case VHOST_USER_SET_VRING_KICK:
2060 case VHOST_USER_SET_VRING_CALL:
2061 case VHOST_USER_SET_VRING_ERR:
2062 case VHOST_USER_SET_VRING_ENABLE:
2063 case VHOST_USER_SEND_RARP:
2064 case VHOST_USER_NET_SET_MTU:
2065 case VHOST_USER_SET_SLAVE_REQ_FD:
2066 vhost_user_lock_all_queue_pairs(dev);
2067 unlock_required = 1;
2075 if (dev->extern_ops.pre_msg_handle) {
2076 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2079 case RTE_VHOST_MSG_RESULT_REPLY:
2080 send_vhost_reply(fd, &msg);
2082 case RTE_VHOST_MSG_RESULT_ERR:
2083 case RTE_VHOST_MSG_RESULT_OK:
2085 goto skip_to_post_handle;
2086 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2092 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2093 if (!vhost_message_handlers[request])
2094 goto skip_to_post_handle;
2095 ret = vhost_message_handlers[request](&dev, &msg, fd);
2098 case RTE_VHOST_MSG_RESULT_ERR:
2099 RTE_LOG(ERR, VHOST_CONFIG,
2100 "Processing %s failed.\n",
2101 vhost_message_str[request]);
2104 case RTE_VHOST_MSG_RESULT_OK:
2105 RTE_LOG(DEBUG, VHOST_CONFIG,
2106 "Processing %s succeeded.\n",
2107 vhost_message_str[request]);
2110 case RTE_VHOST_MSG_RESULT_REPLY:
2111 RTE_LOG(DEBUG, VHOST_CONFIG,
2112 "Processing %s succeeded and needs reply.\n",
2113 vhost_message_str[request]);
2114 send_vhost_reply(fd, &msg);
2122 skip_to_post_handle:
2123 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2124 dev->extern_ops.post_msg_handle) {
2125 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2128 case RTE_VHOST_MSG_RESULT_REPLY:
2129 send_vhost_reply(fd, &msg);
2131 case RTE_VHOST_MSG_RESULT_ERR:
2132 case RTE_VHOST_MSG_RESULT_OK:
2134 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2140 if (unlock_required)
2141 vhost_user_unlock_all_queue_pairs(dev);
2143 /* If message was not handled at this stage, treat it as an error */
2145 RTE_LOG(ERR, VHOST_CONFIG,
2146 "vhost message (req: %d) was not handled.\n", request);
2147 ret = RTE_VHOST_MSG_RESULT_ERR;
2151 * If the request required a reply that was already sent,
2152 * this optional reply-ack won't be sent as the
2153 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2155 if (msg.flags & VHOST_USER_NEED_REPLY) {
2156 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2157 msg.size = sizeof(msg.payload.u64);
2159 send_vhost_reply(fd, &msg);
2160 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2161 RTE_LOG(ERR, VHOST_CONFIG,
2162 "vhost message handling failed.\n");
2166 if (!(dev->flags & VIRTIO_DEV_RUNNING) && virtio_is_ready(dev)) {
2167 dev->flags |= VIRTIO_DEV_READY;
2169 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
2170 if (dev->dequeue_zero_copy) {
2171 RTE_LOG(INFO, VHOST_CONFIG,
2172 "dequeue zero copy is enabled\n");
2175 if (dev->notify_ops->new_device(dev->vid) == 0)
2176 dev->flags |= VIRTIO_DEV_RUNNING;
2180 did = dev->vdpa_dev_id;
2181 vdpa_dev = rte_vdpa_get_device(did);
2182 if (vdpa_dev && virtio_is_ready(dev) &&
2183 !(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) &&
2184 msg.request.master == VHOST_USER_SET_VRING_CALL) {
2185 if (vdpa_dev->ops->dev_conf)
2186 vdpa_dev->ops->dev_conf(dev->vid);
2187 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
2193 static int process_slave_message_reply(struct virtio_net *dev,
2194 const struct VhostUserMsg *msg)
2196 struct VhostUserMsg msg_reply;
2199 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
2202 if (read_vhost_message(dev->slave_req_fd, &msg_reply) < 0) {
2207 if (msg_reply.request.slave != msg->request.slave) {
2208 RTE_LOG(ERR, VHOST_CONFIG,
2209 "Received unexpected msg type (%u), expected %u\n",
2210 msg_reply.request.slave, msg->request.slave);
2215 ret = msg_reply.payload.u64 ? -1 : 0;
2218 rte_spinlock_unlock(&dev->slave_req_lock);
2223 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
2226 struct VhostUserMsg msg = {
2227 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
2228 .flags = VHOST_USER_VERSION,
2229 .size = sizeof(msg.payload.iotlb),
2233 .type = VHOST_IOTLB_MISS,
2237 ret = send_vhost_message(dev->slave_req_fd, &msg);
2239 RTE_LOG(ERR, VHOST_CONFIG,
2240 "Failed to send IOTLB miss message (%d)\n",
2248 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
2254 struct VhostUserMsg msg = {
2255 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
2256 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
2257 .size = sizeof(msg.payload.area),
2259 .u64 = index & VHOST_USER_VRING_IDX_MASK,
2266 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
2272 ret = send_vhost_slave_message(dev, &msg);
2274 RTE_LOG(ERR, VHOST_CONFIG,
2275 "Failed to set host notifier (%d)\n", ret);
2279 return process_slave_message_reply(dev, &msg);
2282 int rte_vhost_host_notifier_ctrl(int vid, bool enable)
2284 struct virtio_net *dev;
2285 struct rte_vdpa_device *vdpa_dev;
2286 int vfio_device_fd, did, ret = 0;
2287 uint64_t offset, size;
2290 dev = get_device(vid);
2294 did = dev->vdpa_dev_id;
2298 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
2299 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
2300 !(dev->protocol_features &
2301 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
2302 !(dev->protocol_features &
2303 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
2304 !(dev->protocol_features &
2305 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
2308 vdpa_dev = rte_vdpa_get_device(did);
2312 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
2313 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
2315 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
2316 if (vfio_device_fd < 0)
2320 for (i = 0; i < dev->nr_vring; i++) {
2321 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
2327 if (vhost_user_slave_set_vring_host_notifier(dev, i,
2328 vfio_device_fd, offset, size) < 0) {
2335 for (i = 0; i < dev->nr_vring; i++) {
2336 vhost_user_slave_set_vring_host_notifier(dev, i, -1,