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++)
107 * Ensure the expected number of FDs is received,
108 * close all FDs and return an error if this is not the case.
111 validate_msg_fds(struct VhostUserMsg *msg, int expected_fds)
113 if (msg->fd_num == expected_fds)
116 VHOST_LOG_CONFIG(ERR,
117 " Expect %d FDs for request %s, received %d\n",
119 vhost_message_str[msg->request.master],
133 ret = fstat(fd, &stat);
134 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
138 free_mem_region(struct virtio_net *dev)
141 struct rte_vhost_mem_region *reg;
143 if (!dev || !dev->mem)
146 for (i = 0; i < dev->mem->nregions; i++) {
147 reg = &dev->mem->regions[i];
148 if (reg->host_user_addr) {
149 munmap(reg->mmap_addr, reg->mmap_size);
156 vhost_backend_cleanup(struct virtio_net *dev)
159 free_mem_region(dev);
164 rte_free(dev->guest_pages);
165 dev->guest_pages = NULL;
168 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
172 if (dev->inflight_info) {
173 if (dev->inflight_info->addr) {
174 munmap(dev->inflight_info->addr,
175 dev->inflight_info->size);
176 dev->inflight_info->addr = NULL;
179 if (dev->inflight_info->fd >= 0) {
180 close(dev->inflight_info->fd);
181 dev->inflight_info->fd = -1;
184 free(dev->inflight_info);
185 dev->inflight_info = NULL;
188 if (dev->slave_req_fd >= 0) {
189 close(dev->slave_req_fd);
190 dev->slave_req_fd = -1;
193 if (dev->postcopy_ufd >= 0) {
194 close(dev->postcopy_ufd);
195 dev->postcopy_ufd = -1;
198 dev->postcopy_listening = 0;
202 vhost_user_notify_queue_state(struct virtio_net *dev, uint16_t index,
205 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
206 struct vhost_virtqueue *vq = dev->virtqueue[index];
208 /* Configure guest notifications on enable */
209 if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF)
210 vhost_enable_guest_notification(dev, vq, vq->notif_enable);
212 if (vdpa_dev && vdpa_dev->ops->set_vring_state)
213 vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
215 if (dev->notify_ops->vring_state_changed)
216 dev->notify_ops->vring_state_changed(dev->vid,
221 * This function just returns success at the moment unless
222 * the device hasn't been initialised.
225 vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
226 struct VhostUserMsg *msg,
227 int main_fd __rte_unused)
229 if (validate_msg_fds(msg, 0) != 0)
230 return RTE_VHOST_MSG_RESULT_ERR;
232 return RTE_VHOST_MSG_RESULT_OK;
236 vhost_user_reset_owner(struct virtio_net **pdev,
237 struct VhostUserMsg *msg,
238 int main_fd __rte_unused)
240 struct virtio_net *dev = *pdev;
242 if (validate_msg_fds(msg, 0) != 0)
243 return RTE_VHOST_MSG_RESULT_ERR;
245 vhost_destroy_device_notify(dev);
247 cleanup_device(dev, 0);
249 return RTE_VHOST_MSG_RESULT_OK;
253 * The features that we support are requested.
256 vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
257 int main_fd __rte_unused)
259 struct virtio_net *dev = *pdev;
260 uint64_t features = 0;
262 if (validate_msg_fds(msg, 0) != 0)
263 return RTE_VHOST_MSG_RESULT_ERR;
265 rte_vhost_driver_get_features(dev->ifname, &features);
267 msg->payload.u64 = features;
268 msg->size = sizeof(msg->payload.u64);
271 return RTE_VHOST_MSG_RESULT_REPLY;
275 * The queue number that we support are requested.
278 vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
279 int main_fd __rte_unused)
281 struct virtio_net *dev = *pdev;
282 uint32_t queue_num = 0;
284 if (validate_msg_fds(msg, 0) != 0)
285 return RTE_VHOST_MSG_RESULT_ERR;
287 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
289 msg->payload.u64 = (uint64_t)queue_num;
290 msg->size = sizeof(msg->payload.u64);
293 return RTE_VHOST_MSG_RESULT_REPLY;
297 * We receive the negotiated features supported by us and the virtio device.
300 vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
301 int main_fd __rte_unused)
303 struct virtio_net *dev = *pdev;
304 uint64_t features = msg->payload.u64;
305 uint64_t vhost_features = 0;
306 struct rte_vdpa_device *vdpa_dev;
308 if (validate_msg_fds(msg, 0) != 0)
309 return RTE_VHOST_MSG_RESULT_ERR;
311 rte_vhost_driver_get_features(dev->ifname, &vhost_features);
312 if (features & ~vhost_features) {
313 VHOST_LOG_CONFIG(ERR,
314 "(%d) received invalid negotiated features.\n",
316 dev->flags |= VIRTIO_DEV_FEATURES_FAILED;
317 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
319 return RTE_VHOST_MSG_RESULT_ERR;
322 if (dev->flags & VIRTIO_DEV_RUNNING) {
323 if (dev->features == features)
324 return RTE_VHOST_MSG_RESULT_OK;
327 * Error out if master tries to change features while device is
328 * in running state. The exception being VHOST_F_LOG_ALL, which
329 * is enabled when the live-migration starts.
331 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
332 VHOST_LOG_CONFIG(ERR,
333 "(%d) features changed while device is running.\n",
335 return RTE_VHOST_MSG_RESULT_ERR;
338 if (dev->notify_ops->features_changed)
339 dev->notify_ops->features_changed(dev->vid, features);
342 dev->features = features;
344 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
345 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
347 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
349 VHOST_LOG_CONFIG(INFO,
350 "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
351 VHOST_LOG_CONFIG(DEBUG,
352 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
354 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
355 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
357 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
358 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
360 * Remove all but first queue pair if MQ hasn't been
361 * negotiated. This is safe because the device is not
362 * running at this stage.
364 while (dev->nr_vring > 2) {
365 struct vhost_virtqueue *vq;
367 vq = dev->virtqueue[--dev->nr_vring];
371 dev->virtqueue[dev->nr_vring] = NULL;
373 cleanup_vq_inflight(dev, vq);
378 vdpa_dev = dev->vdpa_dev;
380 vdpa_dev->ops->set_features(dev->vid);
382 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED;
383 return RTE_VHOST_MSG_RESULT_OK;
387 * The virtio device sends us the size of the descriptor ring.
390 vhost_user_set_vring_num(struct virtio_net **pdev,
391 struct VhostUserMsg *msg,
392 int main_fd __rte_unused)
394 struct virtio_net *dev = *pdev;
395 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
397 if (validate_msg_fds(msg, 0) != 0)
398 return RTE_VHOST_MSG_RESULT_ERR;
400 vq->size = msg->payload.state.num;
402 /* VIRTIO 1.0, 2.4 Virtqueues says:
404 * Queue Size value is always a power of 2. The maximum Queue Size
407 * VIRTIO 1.1 2.7 Virtqueues says:
409 * Packed virtqueues support up to 2^15 entries each.
411 if (!vq_is_packed(dev)) {
412 if (vq->size & (vq->size - 1)) {
413 VHOST_LOG_CONFIG(ERR,
414 "invalid virtqueue size %u\n", vq->size);
415 return RTE_VHOST_MSG_RESULT_ERR;
419 if (vq->size > 32768) {
420 VHOST_LOG_CONFIG(ERR,
421 "invalid virtqueue size %u\n", vq->size);
422 return RTE_VHOST_MSG_RESULT_ERR;
425 if (vq_is_packed(dev)) {
426 if (vq->shadow_used_packed)
427 rte_free(vq->shadow_used_packed);
428 vq->shadow_used_packed = rte_malloc(NULL,
430 sizeof(struct vring_used_elem_packed),
431 RTE_CACHE_LINE_SIZE);
432 if (!vq->shadow_used_packed) {
433 VHOST_LOG_CONFIG(ERR,
434 "failed to allocate memory for shadow used ring.\n");
435 return RTE_VHOST_MSG_RESULT_ERR;
439 if (vq->shadow_used_split)
440 rte_free(vq->shadow_used_split);
442 vq->shadow_used_split = rte_malloc(NULL,
443 vq->size * sizeof(struct vring_used_elem),
444 RTE_CACHE_LINE_SIZE);
446 if (!vq->shadow_used_split) {
447 VHOST_LOG_CONFIG(ERR,
448 "failed to allocate memory for vq internal data.\n");
449 return RTE_VHOST_MSG_RESULT_ERR;
453 if (vq->batch_copy_elems)
454 rte_free(vq->batch_copy_elems);
455 vq->batch_copy_elems = rte_malloc(NULL,
456 vq->size * sizeof(struct batch_copy_elem),
457 RTE_CACHE_LINE_SIZE);
458 if (!vq->batch_copy_elems) {
459 VHOST_LOG_CONFIG(ERR,
460 "failed to allocate memory for batching copy.\n");
461 return RTE_VHOST_MSG_RESULT_ERR;
464 return RTE_VHOST_MSG_RESULT_OK;
468 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
469 * same numa node as the memory of vring descriptor.
471 #ifdef RTE_LIBRTE_VHOST_NUMA
472 static struct virtio_net*
473 numa_realloc(struct virtio_net *dev, int index)
475 int oldnode, newnode;
476 struct virtio_net *old_dev;
477 struct vhost_virtqueue *old_vq, *vq;
478 struct vring_used_elem *new_shadow_used_split;
479 struct vring_used_elem_packed *new_shadow_used_packed;
480 struct batch_copy_elem *new_batch_copy_elems;
483 if (dev->flags & VIRTIO_DEV_RUNNING)
487 vq = old_vq = dev->virtqueue[index];
489 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
490 MPOL_F_NODE | MPOL_F_ADDR);
492 /* check if we need to reallocate vq */
493 ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
494 MPOL_F_NODE | MPOL_F_ADDR);
496 VHOST_LOG_CONFIG(ERR,
497 "Unable to get vq numa information.\n");
500 if (oldnode != newnode) {
501 VHOST_LOG_CONFIG(INFO,
502 "reallocate vq from %d to %d node\n", oldnode, newnode);
503 vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
507 memcpy(vq, old_vq, sizeof(*vq));
509 if (vq_is_packed(dev)) {
510 new_shadow_used_packed = rte_malloc_socket(NULL,
512 sizeof(struct vring_used_elem_packed),
515 if (new_shadow_used_packed) {
516 rte_free(vq->shadow_used_packed);
517 vq->shadow_used_packed = new_shadow_used_packed;
520 new_shadow_used_split = rte_malloc_socket(NULL,
522 sizeof(struct vring_used_elem),
525 if (new_shadow_used_split) {
526 rte_free(vq->shadow_used_split);
527 vq->shadow_used_split = new_shadow_used_split;
531 new_batch_copy_elems = rte_malloc_socket(NULL,
532 vq->size * sizeof(struct batch_copy_elem),
535 if (new_batch_copy_elems) {
536 rte_free(vq->batch_copy_elems);
537 vq->batch_copy_elems = new_batch_copy_elems;
543 /* check if we need to reallocate dev */
544 ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
545 MPOL_F_NODE | MPOL_F_ADDR);
547 VHOST_LOG_CONFIG(ERR,
548 "Unable to get dev numa information.\n");
551 if (oldnode != newnode) {
552 VHOST_LOG_CONFIG(INFO,
553 "reallocate dev from %d to %d node\n",
555 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
561 memcpy(dev, old_dev, sizeof(*dev));
566 dev->virtqueue[index] = vq;
567 vhost_devices[dev->vid] = dev;
570 vhost_user_iotlb_init(dev, index);
575 static struct virtio_net*
576 numa_realloc(struct virtio_net *dev, int index __rte_unused)
582 /* Converts QEMU virtual address to Vhost virtual address. */
584 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
586 struct rte_vhost_mem_region *r;
589 if (unlikely(!dev || !dev->mem))
592 /* Find the region where the address lives. */
593 for (i = 0; i < dev->mem->nregions; i++) {
594 r = &dev->mem->regions[i];
596 if (qva >= r->guest_user_addr &&
597 qva < r->guest_user_addr + r->size) {
599 if (unlikely(*len > r->guest_user_addr + r->size - qva))
600 *len = r->guest_user_addr + r->size - qva;
602 return qva - r->guest_user_addr +
614 * Converts ring address to Vhost virtual address.
615 * If IOMMU is enabled, the ring address is a guest IO virtual address,
616 * else it is a QEMU virtual address.
619 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
620 uint64_t ra, uint64_t *size)
622 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
625 vhost_user_iotlb_rd_lock(vq);
626 vva = vhost_iova_to_vva(dev, vq, ra,
627 size, VHOST_ACCESS_RW);
628 vhost_user_iotlb_rd_unlock(vq);
633 return qva_to_vva(dev, ra, size);
637 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
641 vhost_user_iotlb_rd_lock(vq);
642 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
643 vhost_user_iotlb_rd_unlock(vq);
648 static struct virtio_net *
649 translate_ring_addresses(struct virtio_net *dev, int vq_index)
651 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
652 struct vhost_vring_addr *addr = &vq->ring_addrs;
653 uint64_t len, expected_len;
655 if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
657 log_addr_to_gpa(dev, vq);
658 if (vq->log_guest_addr == 0) {
659 VHOST_LOG_CONFIG(DEBUG,
660 "(%d) failed to map log_guest_addr.\n",
666 if (vq_is_packed(dev)) {
667 len = sizeof(struct vring_packed_desc) * vq->size;
668 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
669 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
670 if (vq->desc_packed == NULL ||
671 len != sizeof(struct vring_packed_desc) *
673 VHOST_LOG_CONFIG(DEBUG,
674 "(%d) failed to map desc_packed ring.\n",
679 dev = numa_realloc(dev, vq_index);
680 vq = dev->virtqueue[vq_index];
681 addr = &vq->ring_addrs;
683 len = sizeof(struct vring_packed_desc_event);
684 vq->driver_event = (struct vring_packed_desc_event *)
685 (uintptr_t)ring_addr_to_vva(dev,
686 vq, addr->avail_user_addr, &len);
687 if (vq->driver_event == NULL ||
688 len != sizeof(struct vring_packed_desc_event)) {
689 VHOST_LOG_CONFIG(DEBUG,
690 "(%d) failed to find driver area address.\n",
695 len = sizeof(struct vring_packed_desc_event);
696 vq->device_event = (struct vring_packed_desc_event *)
697 (uintptr_t)ring_addr_to_vva(dev,
698 vq, addr->used_user_addr, &len);
699 if (vq->device_event == NULL ||
700 len != sizeof(struct vring_packed_desc_event)) {
701 VHOST_LOG_CONFIG(DEBUG,
702 "(%d) failed to find device area address.\n",
711 /* The addresses are converted from QEMU virtual to Vhost virtual. */
712 if (vq->desc && vq->avail && vq->used)
715 len = sizeof(struct vring_desc) * vq->size;
716 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
717 vq, addr->desc_user_addr, &len);
718 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
719 VHOST_LOG_CONFIG(DEBUG,
720 "(%d) failed to map desc ring.\n",
725 dev = numa_realloc(dev, vq_index);
726 vq = dev->virtqueue[vq_index];
727 addr = &vq->ring_addrs;
729 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
730 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
731 len += sizeof(uint16_t);
733 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
734 vq, addr->avail_user_addr, &len);
735 if (vq->avail == 0 || len != expected_len) {
736 VHOST_LOG_CONFIG(DEBUG,
737 "(%d) failed to map avail ring.\n",
742 len = sizeof(struct vring_used) +
743 sizeof(struct vring_used_elem) * vq->size;
744 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
745 len += sizeof(uint16_t);
747 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
748 vq, addr->used_user_addr, &len);
749 if (vq->used == 0 || len != expected_len) {
750 VHOST_LOG_CONFIG(DEBUG,
751 "(%d) failed to map used ring.\n",
756 if (vq->last_used_idx != vq->used->idx) {
757 VHOST_LOG_CONFIG(WARNING,
758 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
759 "some packets maybe resent for Tx and dropped for Rx\n",
760 vq->last_used_idx, vq->used->idx);
761 vq->last_used_idx = vq->used->idx;
762 vq->last_avail_idx = vq->used->idx;
767 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
769 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
770 dev->vid, vq->avail);
771 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
773 VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
774 dev->vid, vq->log_guest_addr);
780 * The virtio device sends us the desc, used and avail ring addresses.
781 * This function then converts these to our address space.
784 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
785 int main_fd __rte_unused)
787 struct virtio_net *dev = *pdev;
788 struct vhost_virtqueue *vq;
789 struct vhost_vring_addr *addr = &msg->payload.addr;
792 if (validate_msg_fds(msg, 0) != 0)
793 return RTE_VHOST_MSG_RESULT_ERR;
795 if (dev->mem == NULL)
796 return RTE_VHOST_MSG_RESULT_ERR;
798 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
799 vq = dev->virtqueue[msg->payload.addr.index];
801 access_ok = vq->access_ok;
804 * Rings addresses should not be interpreted as long as the ring is not
805 * started and enabled
807 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
809 vring_invalidate(dev, vq);
811 if ((vq->enabled && (dev->features &
812 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
814 dev = translate_ring_addresses(dev, msg->payload.addr.index);
816 return RTE_VHOST_MSG_RESULT_ERR;
821 return RTE_VHOST_MSG_RESULT_OK;
825 * The virtio device sends us the available ring last used index.
828 vhost_user_set_vring_base(struct virtio_net **pdev,
829 struct VhostUserMsg *msg,
830 int main_fd __rte_unused)
832 struct virtio_net *dev = *pdev;
833 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
834 uint64_t val = msg->payload.state.num;
836 if (validate_msg_fds(msg, 0) != 0)
837 return RTE_VHOST_MSG_RESULT_ERR;
839 if (vq_is_packed(dev)) {
841 * Bit[0:14]: avail index
842 * Bit[15]: avail wrap counter
844 vq->last_avail_idx = val & 0x7fff;
845 vq->avail_wrap_counter = !!(val & (0x1 << 15));
847 * Set used index to same value as available one, as
848 * their values should be the same since ring processing
849 * was stopped at get time.
851 vq->last_used_idx = vq->last_avail_idx;
852 vq->used_wrap_counter = vq->avail_wrap_counter;
854 vq->last_used_idx = msg->payload.state.num;
855 vq->last_avail_idx = msg->payload.state.num;
858 return RTE_VHOST_MSG_RESULT_OK;
862 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
863 uint64_t host_phys_addr, uint64_t size)
865 struct guest_page *page, *last_page;
866 struct guest_page *old_pages;
868 if (dev->nr_guest_pages == dev->max_guest_pages) {
869 dev->max_guest_pages *= 2;
870 old_pages = dev->guest_pages;
871 dev->guest_pages = rte_realloc(dev->guest_pages,
872 dev->max_guest_pages * sizeof(*page),
873 RTE_CACHE_LINE_SIZE);
874 if (dev->guest_pages == NULL) {
875 VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
881 if (dev->nr_guest_pages > 0) {
882 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
883 /* merge if the two pages are continuous */
884 if (host_phys_addr == last_page->host_phys_addr +
886 last_page->size += size;
891 page = &dev->guest_pages[dev->nr_guest_pages++];
892 page->guest_phys_addr = guest_phys_addr;
893 page->host_phys_addr = host_phys_addr;
900 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
903 uint64_t reg_size = reg->size;
904 uint64_t host_user_addr = reg->host_user_addr;
905 uint64_t guest_phys_addr = reg->guest_phys_addr;
906 uint64_t host_phys_addr;
909 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
910 size = page_size - (guest_phys_addr & (page_size - 1));
911 size = RTE_MIN(size, reg_size);
913 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
916 host_user_addr += size;
917 guest_phys_addr += size;
920 while (reg_size > 0) {
921 size = RTE_MIN(reg_size, page_size);
922 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
924 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
928 host_user_addr += size;
929 guest_phys_addr += size;
933 /* sort guest page array if over binary search threshold */
934 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
935 qsort((void *)dev->guest_pages, dev->nr_guest_pages,
936 sizeof(struct guest_page), guest_page_addrcmp);
942 #ifdef RTE_LIBRTE_VHOST_DEBUG
943 /* TODO: enable it only in debug mode? */
945 dump_guest_pages(struct virtio_net *dev)
948 struct guest_page *page;
950 for (i = 0; i < dev->nr_guest_pages; i++) {
951 page = &dev->guest_pages[i];
953 VHOST_LOG_CONFIG(INFO,
954 "guest physical page region %u\n"
955 "\t guest_phys_addr: %" PRIx64 "\n"
956 "\t host_phys_addr : %" PRIx64 "\n"
957 "\t size : %" PRIx64 "\n",
959 page->guest_phys_addr,
960 page->host_phys_addr,
965 #define dump_guest_pages(dev)
969 vhost_memory_changed(struct VhostUserMemory *new,
970 struct rte_vhost_memory *old)
974 if (new->nregions != old->nregions)
977 for (i = 0; i < new->nregions; ++i) {
978 VhostUserMemoryRegion *new_r = &new->regions[i];
979 struct rte_vhost_mem_region *old_r = &old->regions[i];
981 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
983 if (new_r->memory_size != old_r->size)
985 if (new_r->userspace_addr != old_r->guest_user_addr)
993 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
996 struct virtio_net *dev = *pdev;
997 struct VhostUserMemory *memory = &msg->payload.memory;
998 struct rte_vhost_mem_region *reg;
1001 uint64_t mmap_offset;
1007 if (validate_msg_fds(msg, memory->nregions) != 0)
1008 return RTE_VHOST_MSG_RESULT_ERR;
1010 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
1011 VHOST_LOG_CONFIG(ERR,
1012 "too many memory regions (%u)\n", memory->nregions);
1013 return RTE_VHOST_MSG_RESULT_ERR;
1016 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
1017 VHOST_LOG_CONFIG(INFO,
1018 "(%d) memory regions not changed\n", dev->vid);
1022 return RTE_VHOST_MSG_RESULT_OK;
1026 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
1027 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
1029 if (vdpa_dev && vdpa_dev->ops->dev_close)
1030 vdpa_dev->ops->dev_close(dev->vid);
1031 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1033 free_mem_region(dev);
1038 /* Flush IOTLB cache as previous HVAs are now invalid */
1039 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
1040 for (i = 0; i < dev->nr_vring; i++)
1041 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
1043 dev->nr_guest_pages = 0;
1044 if (dev->guest_pages == NULL) {
1045 dev->max_guest_pages = 8;
1046 dev->guest_pages = rte_zmalloc(NULL,
1047 dev->max_guest_pages *
1048 sizeof(struct guest_page),
1049 RTE_CACHE_LINE_SIZE);
1050 if (dev->guest_pages == NULL) {
1051 VHOST_LOG_CONFIG(ERR,
1052 "(%d) failed to allocate memory "
1053 "for dev->guest_pages\n",
1055 return RTE_VHOST_MSG_RESULT_ERR;
1059 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
1060 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
1061 if (dev->mem == NULL) {
1062 VHOST_LOG_CONFIG(ERR,
1063 "(%d) failed to allocate memory for dev->mem\n",
1065 return RTE_VHOST_MSG_RESULT_ERR;
1067 dev->mem->nregions = memory->nregions;
1069 for (i = 0; i < memory->nregions; i++) {
1071 reg = &dev->mem->regions[i];
1073 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1074 reg->guest_user_addr = memory->regions[i].userspace_addr;
1075 reg->size = memory->regions[i].memory_size;
1078 mmap_offset = memory->regions[i].mmap_offset;
1080 /* Check for memory_size + mmap_offset overflow */
1081 if (mmap_offset >= -reg->size) {
1082 VHOST_LOG_CONFIG(ERR,
1083 "mmap_offset (%#"PRIx64") and memory_size "
1084 "(%#"PRIx64") overflow\n",
1085 mmap_offset, reg->size);
1089 mmap_size = reg->size + mmap_offset;
1091 /* mmap() without flag of MAP_ANONYMOUS, should be called
1092 * with length argument aligned with hugepagesz at older
1093 * longterm version Linux, like 2.6.32 and 3.2.72, or
1094 * mmap() will fail with EINVAL.
1096 * to avoid failure, make sure in caller to keep length
1099 alignment = get_blk_size(fd);
1100 if (alignment == (uint64_t)-1) {
1101 VHOST_LOG_CONFIG(ERR,
1102 "couldn't get hugepage size through fstat\n");
1105 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1106 if (mmap_size == 0) {
1108 * It could happen if initial mmap_size + alignment
1109 * overflows the sizeof uint64, which could happen if
1110 * either mmap_size or alignment value is wrong.
1112 * mmap() kernel implementation would return an error,
1113 * but better catch it before and provide useful info
1116 VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
1117 "or alignment (0x%" PRIx64 ") is invalid\n",
1118 reg->size + mmap_offset, alignment);
1122 populate = dev->async_copy ? MAP_POPULATE : 0;
1123 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1124 MAP_SHARED | populate, fd, 0);
1126 if (mmap_addr == MAP_FAILED) {
1127 VHOST_LOG_CONFIG(ERR,
1128 "mmap region %u failed.\n", i);
1132 reg->mmap_addr = mmap_addr;
1133 reg->mmap_size = mmap_size;
1134 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
1137 if (dev->async_copy)
1138 if (add_guest_pages(dev, reg, alignment) < 0) {
1139 VHOST_LOG_CONFIG(ERR,
1140 "adding guest pages to region %u failed.\n",
1145 VHOST_LOG_CONFIG(INFO,
1146 "guest memory region %u, size: 0x%" PRIx64 "\n"
1147 "\t guest physical addr: 0x%" PRIx64 "\n"
1148 "\t guest virtual addr: 0x%" PRIx64 "\n"
1149 "\t host virtual addr: 0x%" PRIx64 "\n"
1150 "\t mmap addr : 0x%" PRIx64 "\n"
1151 "\t mmap size : 0x%" PRIx64 "\n"
1152 "\t mmap align: 0x%" PRIx64 "\n"
1153 "\t mmap off : 0x%" PRIx64 "\n",
1155 reg->guest_phys_addr,
1156 reg->guest_user_addr,
1157 reg->host_user_addr,
1158 (uint64_t)(uintptr_t)mmap_addr,
1163 if (dev->postcopy_listening) {
1165 * We haven't a better way right now than sharing
1166 * DPDK's virtual address with Qemu, so that Qemu can
1167 * retrieve the region offset when handling userfaults.
1169 memory->regions[i].userspace_addr =
1170 reg->host_user_addr;
1173 if (dev->postcopy_listening) {
1174 /* Send the addresses back to qemu */
1176 send_vhost_reply(main_fd, msg);
1178 /* Wait for qemu to acknolwedge it's got the addresses
1179 * we've got to wait before we're allowed to generate faults.
1181 VhostUserMsg ack_msg;
1182 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1183 VHOST_LOG_CONFIG(ERR,
1184 "Failed to read qemu ack on postcopy set-mem-table\n");
1188 if (validate_msg_fds(&ack_msg, 0) != 0)
1191 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1192 VHOST_LOG_CONFIG(ERR,
1193 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1194 ack_msg.request.master);
1198 /* Now userfault register and we can use the memory */
1199 for (i = 0; i < memory->nregions; i++) {
1200 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1201 reg = &dev->mem->regions[i];
1202 struct uffdio_register reg_struct;
1205 * Let's register all the mmap'ed area to ensure
1206 * alignment on page boundary.
1208 reg_struct.range.start =
1209 (uint64_t)(uintptr_t)reg->mmap_addr;
1210 reg_struct.range.len = reg->mmap_size;
1211 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1213 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1215 VHOST_LOG_CONFIG(ERR,
1216 "Failed to register ufd for region %d: (ufd = %d) %s\n",
1217 i, dev->postcopy_ufd,
1221 VHOST_LOG_CONFIG(INFO,
1222 "\t userfaultfd registered for range : "
1223 "%" PRIx64 " - %" PRIx64 "\n",
1224 (uint64_t)reg_struct.range.start,
1225 (uint64_t)reg_struct.range.start +
1226 (uint64_t)reg_struct.range.len - 1);
1233 for (i = 0; i < dev->nr_vring; i++) {
1234 struct vhost_virtqueue *vq = dev->virtqueue[i];
1236 if (vq->desc || vq->avail || vq->used) {
1238 * If the memory table got updated, the ring addresses
1239 * need to be translated again as virtual addresses have
1242 vring_invalidate(dev, vq);
1244 dev = translate_ring_addresses(dev, i);
1254 dump_guest_pages(dev);
1256 return RTE_VHOST_MSG_RESULT_OK;
1259 free_mem_region(dev);
1262 return RTE_VHOST_MSG_RESULT_ERR;
1266 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1273 if (vq_is_packed(dev))
1274 rings_ok = vq->desc_packed && vq->driver_event &&
1277 rings_ok = vq->desc && vq->avail && vq->used;
1280 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1281 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1285 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u
1288 virtio_is_ready(struct virtio_net *dev)
1290 struct vhost_virtqueue *vq;
1291 uint32_t i, nr_vring = dev->nr_vring;
1293 if (dev->flags & VIRTIO_DEV_READY)
1299 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) {
1300 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
1302 if (dev->nr_vring < nr_vring)
1306 for (i = 0; i < nr_vring; i++) {
1307 vq = dev->virtqueue[i];
1309 if (!vq_is_ready(dev, vq))
1313 /* If supported, ensure the frontend is really done with config */
1314 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
1315 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
1318 dev->flags |= VIRTIO_DEV_READY;
1320 if (!(dev->flags & VIRTIO_DEV_RUNNING))
1321 VHOST_LOG_CONFIG(INFO,
1322 "virtio is now ready for processing.\n");
1327 inflight_mem_alloc(const char *name, size_t size, int *fd)
1331 char fname[20] = "/tmp/memfd-XXXXXX";
1334 #ifdef MEMFD_SUPPORTED
1335 mfd = memfd_create(name, MFD_CLOEXEC);
1340 mfd = mkstemp(fname);
1342 VHOST_LOG_CONFIG(ERR,
1343 "failed to get inflight buffer fd\n");
1350 if (ftruncate(mfd, size) == -1) {
1351 VHOST_LOG_CONFIG(ERR,
1352 "failed to alloc inflight buffer\n");
1357 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
1358 if (ptr == MAP_FAILED) {
1359 VHOST_LOG_CONFIG(ERR,
1360 "failed to mmap inflight buffer\n");
1370 get_pervq_shm_size_split(uint16_t queue_size)
1372 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
1373 queue_size + sizeof(uint64_t) +
1374 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
1378 get_pervq_shm_size_packed(uint16_t queue_size)
1380 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
1381 * queue_size + sizeof(uint64_t) +
1382 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
1383 INFLIGHT_ALIGNMENT);
1387 vhost_user_get_inflight_fd(struct virtio_net **pdev,
1389 int main_fd __rte_unused)
1391 struct rte_vhost_inflight_info_packed *inflight_packed;
1392 uint64_t pervq_inflight_size, mmap_size;
1393 uint16_t num_queues, queue_size;
1394 struct virtio_net *dev = *pdev;
1398 if (msg->size != sizeof(msg->payload.inflight)) {
1399 VHOST_LOG_CONFIG(ERR,
1400 "invalid get_inflight_fd message size is %d\n",
1402 return RTE_VHOST_MSG_RESULT_ERR;
1405 if (dev->inflight_info == NULL) {
1406 dev->inflight_info = calloc(1,
1407 sizeof(struct inflight_mem_info));
1408 if (!dev->inflight_info) {
1409 VHOST_LOG_CONFIG(ERR,
1410 "failed to alloc dev inflight area\n");
1411 return RTE_VHOST_MSG_RESULT_ERR;
1413 dev->inflight_info->fd = -1;
1416 num_queues = msg->payload.inflight.num_queues;
1417 queue_size = msg->payload.inflight.queue_size;
1419 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
1420 msg->payload.inflight.num_queues);
1421 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
1422 msg->payload.inflight.queue_size);
1424 if (vq_is_packed(dev))
1425 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1427 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1429 mmap_size = num_queues * pervq_inflight_size;
1430 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
1432 VHOST_LOG_CONFIG(ERR,
1433 "failed to alloc vhost inflight area\n");
1434 msg->payload.inflight.mmap_size = 0;
1435 return RTE_VHOST_MSG_RESULT_ERR;
1437 memset(addr, 0, mmap_size);
1439 if (dev->inflight_info->addr) {
1440 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1441 dev->inflight_info->addr = NULL;
1444 if (dev->inflight_info->fd >= 0) {
1445 close(dev->inflight_info->fd);
1446 dev->inflight_info->fd = -1;
1449 dev->inflight_info->addr = addr;
1450 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
1451 dev->inflight_info->fd = msg->fds[0] = fd;
1452 msg->payload.inflight.mmap_offset = 0;
1455 if (vq_is_packed(dev)) {
1456 for (i = 0; i < num_queues; i++) {
1458 (struct rte_vhost_inflight_info_packed *)addr;
1459 inflight_packed->used_wrap_counter = 1;
1460 inflight_packed->old_used_wrap_counter = 1;
1461 for (j = 0; j < queue_size; j++)
1462 inflight_packed->desc[j].next = j + 1;
1463 addr = (void *)((char *)addr + pervq_inflight_size);
1467 VHOST_LOG_CONFIG(INFO,
1468 "send inflight mmap_size: %"PRIu64"\n",
1469 msg->payload.inflight.mmap_size);
1470 VHOST_LOG_CONFIG(INFO,
1471 "send inflight mmap_offset: %"PRIu64"\n",
1472 msg->payload.inflight.mmap_offset);
1473 VHOST_LOG_CONFIG(INFO,
1474 "send inflight fd: %d\n", msg->fds[0]);
1476 return RTE_VHOST_MSG_RESULT_REPLY;
1480 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
1481 int main_fd __rte_unused)
1483 uint64_t mmap_size, mmap_offset;
1484 uint16_t num_queues, queue_size;
1485 struct virtio_net *dev = *pdev;
1486 uint32_t pervq_inflight_size;
1487 struct vhost_virtqueue *vq;
1492 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
1493 VHOST_LOG_CONFIG(ERR,
1494 "invalid set_inflight_fd message size is %d,fd is %d\n",
1496 return RTE_VHOST_MSG_RESULT_ERR;
1499 mmap_size = msg->payload.inflight.mmap_size;
1500 mmap_offset = msg->payload.inflight.mmap_offset;
1501 num_queues = msg->payload.inflight.num_queues;
1502 queue_size = msg->payload.inflight.queue_size;
1504 if (vq_is_packed(dev))
1505 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1507 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1509 VHOST_LOG_CONFIG(INFO,
1510 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
1511 VHOST_LOG_CONFIG(INFO,
1512 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
1513 VHOST_LOG_CONFIG(INFO,
1514 "set_inflight_fd num_queues: %u\n", num_queues);
1515 VHOST_LOG_CONFIG(INFO,
1516 "set_inflight_fd queue_size: %u\n", queue_size);
1517 VHOST_LOG_CONFIG(INFO,
1518 "set_inflight_fd fd: %d\n", fd);
1519 VHOST_LOG_CONFIG(INFO,
1520 "set_inflight_fd pervq_inflight_size: %d\n",
1521 pervq_inflight_size);
1523 if (!dev->inflight_info) {
1524 dev->inflight_info = calloc(1,
1525 sizeof(struct inflight_mem_info));
1526 if (dev->inflight_info == NULL) {
1527 VHOST_LOG_CONFIG(ERR,
1528 "failed to alloc dev inflight area\n");
1529 return RTE_VHOST_MSG_RESULT_ERR;
1531 dev->inflight_info->fd = -1;
1534 if (dev->inflight_info->addr) {
1535 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1536 dev->inflight_info->addr = NULL;
1539 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
1541 if (addr == MAP_FAILED) {
1542 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
1543 return RTE_VHOST_MSG_RESULT_ERR;
1546 if (dev->inflight_info->fd >= 0) {
1547 close(dev->inflight_info->fd);
1548 dev->inflight_info->fd = -1;
1551 dev->inflight_info->fd = fd;
1552 dev->inflight_info->addr = addr;
1553 dev->inflight_info->size = mmap_size;
1555 for (i = 0; i < num_queues; i++) {
1556 vq = dev->virtqueue[i];
1557 if (vq_is_packed(dev)) {
1558 vq->inflight_packed = addr;
1559 vq->inflight_packed->desc_num = queue_size;
1561 vq->inflight_split = addr;
1562 vq->inflight_split->desc_num = queue_size;
1564 addr = (void *)((char *)addr + pervq_inflight_size);
1567 return RTE_VHOST_MSG_RESULT_OK;
1571 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1572 int main_fd __rte_unused)
1574 struct virtio_net *dev = *pdev;
1575 struct vhost_vring_file file;
1576 struct vhost_virtqueue *vq;
1579 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1580 if (validate_msg_fds(msg, expected_fds) != 0)
1581 return RTE_VHOST_MSG_RESULT_ERR;
1583 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1584 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1585 file.fd = VIRTIO_INVALID_EVENTFD;
1587 file.fd = msg->fds[0];
1588 VHOST_LOG_CONFIG(INFO,
1589 "vring call idx:%d file:%d\n", file.index, file.fd);
1591 vq = dev->virtqueue[file.index];
1595 vhost_user_notify_queue_state(dev, file.index, 0);
1598 if (vq->callfd >= 0)
1601 vq->callfd = file.fd;
1603 return RTE_VHOST_MSG_RESULT_OK;
1606 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1607 struct VhostUserMsg *msg,
1608 int main_fd __rte_unused)
1612 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1613 if (validate_msg_fds(msg, expected_fds) != 0)
1614 return RTE_VHOST_MSG_RESULT_ERR;
1616 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1618 VHOST_LOG_CONFIG(INFO, "not implemented\n");
1620 return RTE_VHOST_MSG_RESULT_OK;
1624 resubmit_desc_compare(const void *a, const void *b)
1626 const struct rte_vhost_resubmit_desc *desc0 = a;
1627 const struct rte_vhost_resubmit_desc *desc1 = b;
1629 if (desc1->counter > desc0->counter)
1636 vhost_check_queue_inflights_split(struct virtio_net *dev,
1637 struct vhost_virtqueue *vq)
1640 uint16_t resubmit_num = 0, last_io, num;
1641 struct vring_used *used = vq->used;
1642 struct rte_vhost_resubmit_info *resubmit;
1643 struct rte_vhost_inflight_info_split *inflight_split;
1645 if (!(dev->protocol_features &
1646 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1647 return RTE_VHOST_MSG_RESULT_OK;
1649 /* The frontend may still not support the inflight feature
1650 * although we negotiate the protocol feature.
1652 if ((!vq->inflight_split))
1653 return RTE_VHOST_MSG_RESULT_OK;
1655 if (!vq->inflight_split->version) {
1656 vq->inflight_split->version = INFLIGHT_VERSION;
1657 return RTE_VHOST_MSG_RESULT_OK;
1660 if (vq->resubmit_inflight)
1661 return RTE_VHOST_MSG_RESULT_OK;
1663 inflight_split = vq->inflight_split;
1664 vq->global_counter = 0;
1665 last_io = inflight_split->last_inflight_io;
1667 if (inflight_split->used_idx != used->idx) {
1668 inflight_split->desc[last_io].inflight = 0;
1670 inflight_split->used_idx = used->idx;
1673 for (i = 0; i < inflight_split->desc_num; i++) {
1674 if (inflight_split->desc[i].inflight == 1)
1678 vq->last_avail_idx += resubmit_num;
1681 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1683 VHOST_LOG_CONFIG(ERR,
1684 "failed to allocate memory for resubmit info.\n");
1685 return RTE_VHOST_MSG_RESULT_ERR;
1688 resubmit->resubmit_list = calloc(resubmit_num,
1689 sizeof(struct rte_vhost_resubmit_desc));
1690 if (!resubmit->resubmit_list) {
1691 VHOST_LOG_CONFIG(ERR,
1692 "failed to allocate memory for inflight desc.\n");
1694 return RTE_VHOST_MSG_RESULT_ERR;
1698 for (i = 0; i < vq->inflight_split->desc_num; i++) {
1699 if (vq->inflight_split->desc[i].inflight == 1) {
1700 resubmit->resubmit_list[num].index = i;
1701 resubmit->resubmit_list[num].counter =
1702 inflight_split->desc[i].counter;
1706 resubmit->resubmit_num = num;
1708 if (resubmit->resubmit_num > 1)
1709 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1710 sizeof(struct rte_vhost_resubmit_desc),
1711 resubmit_desc_compare);
1713 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1714 vq->resubmit_inflight = resubmit;
1717 return RTE_VHOST_MSG_RESULT_OK;
1721 vhost_check_queue_inflights_packed(struct virtio_net *dev,
1722 struct vhost_virtqueue *vq)
1725 uint16_t resubmit_num = 0, old_used_idx, num;
1726 struct rte_vhost_resubmit_info *resubmit;
1727 struct rte_vhost_inflight_info_packed *inflight_packed;
1729 if (!(dev->protocol_features &
1730 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1731 return RTE_VHOST_MSG_RESULT_OK;
1733 /* The frontend may still not support the inflight feature
1734 * although we negotiate the protocol feature.
1736 if ((!vq->inflight_packed))
1737 return RTE_VHOST_MSG_RESULT_OK;
1739 if (!vq->inflight_packed->version) {
1740 vq->inflight_packed->version = INFLIGHT_VERSION;
1741 return RTE_VHOST_MSG_RESULT_OK;
1744 if (vq->resubmit_inflight)
1745 return RTE_VHOST_MSG_RESULT_OK;
1747 inflight_packed = vq->inflight_packed;
1748 vq->global_counter = 0;
1749 old_used_idx = inflight_packed->old_used_idx;
1751 if (inflight_packed->used_idx != old_used_idx) {
1752 if (inflight_packed->desc[old_used_idx].inflight == 0) {
1753 inflight_packed->old_used_idx =
1754 inflight_packed->used_idx;
1755 inflight_packed->old_used_wrap_counter =
1756 inflight_packed->used_wrap_counter;
1757 inflight_packed->old_free_head =
1758 inflight_packed->free_head;
1760 inflight_packed->used_idx =
1761 inflight_packed->old_used_idx;
1762 inflight_packed->used_wrap_counter =
1763 inflight_packed->old_used_wrap_counter;
1764 inflight_packed->free_head =
1765 inflight_packed->old_free_head;
1769 for (i = 0; i < inflight_packed->desc_num; i++) {
1770 if (inflight_packed->desc[i].inflight == 1)
1775 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1776 if (resubmit == NULL) {
1777 VHOST_LOG_CONFIG(ERR,
1778 "failed to allocate memory for resubmit info.\n");
1779 return RTE_VHOST_MSG_RESULT_ERR;
1782 resubmit->resubmit_list = calloc(resubmit_num,
1783 sizeof(struct rte_vhost_resubmit_desc));
1784 if (resubmit->resubmit_list == NULL) {
1785 VHOST_LOG_CONFIG(ERR,
1786 "failed to allocate memory for resubmit desc.\n");
1788 return RTE_VHOST_MSG_RESULT_ERR;
1792 for (i = 0; i < inflight_packed->desc_num; i++) {
1793 if (vq->inflight_packed->desc[i].inflight == 1) {
1794 resubmit->resubmit_list[num].index = i;
1795 resubmit->resubmit_list[num].counter =
1796 inflight_packed->desc[i].counter;
1800 resubmit->resubmit_num = num;
1802 if (resubmit->resubmit_num > 1)
1803 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1804 sizeof(struct rte_vhost_resubmit_desc),
1805 resubmit_desc_compare);
1807 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1808 vq->resubmit_inflight = resubmit;
1811 return RTE_VHOST_MSG_RESULT_OK;
1815 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1816 int main_fd __rte_unused)
1818 struct virtio_net *dev = *pdev;
1819 struct vhost_vring_file file;
1820 struct vhost_virtqueue *vq;
1823 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1824 if (validate_msg_fds(msg, expected_fds) != 0)
1825 return RTE_VHOST_MSG_RESULT_ERR;
1827 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1828 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1829 file.fd = VIRTIO_INVALID_EVENTFD;
1831 file.fd = msg->fds[0];
1832 VHOST_LOG_CONFIG(INFO,
1833 "vring kick idx:%d file:%d\n", file.index, file.fd);
1835 /* Interpret ring addresses only when ring is started. */
1836 dev = translate_ring_addresses(dev, file.index);
1838 return RTE_VHOST_MSG_RESULT_ERR;
1842 vq = dev->virtqueue[file.index];
1845 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1846 * the ring starts already enabled. Otherwise, it is enabled via
1847 * the SET_VRING_ENABLE message.
1849 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1851 if (dev->notify_ops->vring_state_changed)
1852 dev->notify_ops->vring_state_changed(
1853 dev->vid, file.index, 1);
1858 vhost_user_notify_queue_state(dev, file.index, 0);
1861 if (vq->kickfd >= 0)
1863 vq->kickfd = file.fd;
1865 if (vq_is_packed(dev)) {
1866 if (vhost_check_queue_inflights_packed(dev, vq)) {
1867 VHOST_LOG_CONFIG(ERR,
1868 "failed to inflights for vq: %d\n", file.index);
1869 return RTE_VHOST_MSG_RESULT_ERR;
1872 if (vhost_check_queue_inflights_split(dev, vq)) {
1873 VHOST_LOG_CONFIG(ERR,
1874 "failed to inflights for vq: %d\n", file.index);
1875 return RTE_VHOST_MSG_RESULT_ERR;
1879 return RTE_VHOST_MSG_RESULT_OK;
1883 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1886 vhost_user_get_vring_base(struct virtio_net **pdev,
1887 struct VhostUserMsg *msg,
1888 int main_fd __rte_unused)
1890 struct virtio_net *dev = *pdev;
1891 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1894 if (validate_msg_fds(msg, 0) != 0)
1895 return RTE_VHOST_MSG_RESULT_ERR;
1897 /* We have to stop the queue (virtio) if it is running. */
1898 vhost_destroy_device_notify(dev);
1900 dev->flags &= ~VIRTIO_DEV_READY;
1901 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1903 /* Here we are safe to get the indexes */
1904 if (vq_is_packed(dev)) {
1906 * Bit[0:14]: avail index
1907 * Bit[15]: avail wrap counter
1909 val = vq->last_avail_idx & 0x7fff;
1910 val |= vq->avail_wrap_counter << 15;
1911 msg->payload.state.num = val;
1913 msg->payload.state.num = vq->last_avail_idx;
1916 VHOST_LOG_CONFIG(INFO,
1917 "vring base idx:%d file:%d\n", msg->payload.state.index,
1918 msg->payload.state.num);
1920 * Based on current qemu vhost-user implementation, this message is
1921 * sent and only sent in vhost_vring_stop.
1922 * TODO: cleanup the vring, it isn't usable since here.
1924 if (vq->kickfd >= 0)
1927 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
1929 if (vq->callfd >= 0)
1932 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
1934 vq->signalled_used_valid = false;
1936 if (vq_is_packed(dev)) {
1937 rte_free(vq->shadow_used_packed);
1938 vq->shadow_used_packed = NULL;
1940 rte_free(vq->shadow_used_split);
1941 vq->shadow_used_split = NULL;
1942 if (vq->async_pkts_pending)
1943 rte_free(vq->async_pkts_pending);
1944 if (vq->async_pending_info)
1945 rte_free(vq->async_pending_info);
1946 vq->async_pkts_pending = NULL;
1947 vq->async_pending_info = NULL;
1950 rte_free(vq->batch_copy_elems);
1951 vq->batch_copy_elems = NULL;
1953 msg->size = sizeof(msg->payload.state);
1956 vring_invalidate(dev, vq);
1958 return RTE_VHOST_MSG_RESULT_REPLY;
1962 * when virtio queues are ready to work, qemu will send us to
1963 * enable the virtio queue pair.
1966 vhost_user_set_vring_enable(struct virtio_net **pdev,
1967 struct VhostUserMsg *msg,
1968 int main_fd __rte_unused)
1970 struct virtio_net *dev = *pdev;
1971 int enable = (int)msg->payload.state.num;
1972 int index = (int)msg->payload.state.index;
1974 if (validate_msg_fds(msg, 0) != 0)
1975 return RTE_VHOST_MSG_RESULT_ERR;
1977 VHOST_LOG_CONFIG(INFO,
1978 "set queue enable: %d to qp idx: %d\n",
1981 if (!enable && dev->virtqueue[index]->async_registered) {
1982 if (dev->virtqueue[index]->async_pkts_inflight_n) {
1983 VHOST_LOG_CONFIG(ERR, "failed to disable vring. "
1984 "async inflight packets must be completed first\n");
1985 return RTE_VHOST_MSG_RESULT_ERR;
1989 dev->virtqueue[index]->enabled = enable;
1991 return RTE_VHOST_MSG_RESULT_OK;
1995 vhost_user_get_protocol_features(struct virtio_net **pdev,
1996 struct VhostUserMsg *msg,
1997 int main_fd __rte_unused)
1999 struct virtio_net *dev = *pdev;
2000 uint64_t features, protocol_features;
2002 if (validate_msg_fds(msg, 0) != 0)
2003 return RTE_VHOST_MSG_RESULT_ERR;
2005 rte_vhost_driver_get_features(dev->ifname, &features);
2006 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
2008 msg->payload.u64 = protocol_features;
2009 msg->size = sizeof(msg->payload.u64);
2012 return RTE_VHOST_MSG_RESULT_REPLY;
2016 vhost_user_set_protocol_features(struct virtio_net **pdev,
2017 struct VhostUserMsg *msg,
2018 int main_fd __rte_unused)
2020 struct virtio_net *dev = *pdev;
2021 uint64_t protocol_features = msg->payload.u64;
2022 uint64_t slave_protocol_features = 0;
2024 if (validate_msg_fds(msg, 0) != 0)
2025 return RTE_VHOST_MSG_RESULT_ERR;
2027 rte_vhost_driver_get_protocol_features(dev->ifname,
2028 &slave_protocol_features);
2029 if (protocol_features & ~slave_protocol_features) {
2030 VHOST_LOG_CONFIG(ERR,
2031 "(%d) received invalid protocol features.\n",
2033 return RTE_VHOST_MSG_RESULT_ERR;
2036 dev->protocol_features = protocol_features;
2037 VHOST_LOG_CONFIG(INFO,
2038 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
2039 dev->protocol_features);
2041 return RTE_VHOST_MSG_RESULT_OK;
2045 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
2046 int main_fd __rte_unused)
2048 struct virtio_net *dev = *pdev;
2049 int fd = msg->fds[0];
2053 if (validate_msg_fds(msg, 1) != 0)
2054 return RTE_VHOST_MSG_RESULT_ERR;
2057 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
2058 return RTE_VHOST_MSG_RESULT_ERR;
2061 if (msg->size != sizeof(VhostUserLog)) {
2062 VHOST_LOG_CONFIG(ERR,
2063 "invalid log base msg size: %"PRId32" != %d\n",
2064 msg->size, (int)sizeof(VhostUserLog));
2065 return RTE_VHOST_MSG_RESULT_ERR;
2068 size = msg->payload.log.mmap_size;
2069 off = msg->payload.log.mmap_offset;
2071 /* Check for mmap size and offset overflow. */
2073 VHOST_LOG_CONFIG(ERR,
2074 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
2076 return RTE_VHOST_MSG_RESULT_ERR;
2079 VHOST_LOG_CONFIG(INFO,
2080 "log mmap size: %"PRId64", offset: %"PRId64"\n",
2084 * mmap from 0 to workaround a hugepage mmap bug: mmap will
2085 * fail when offset is not page size aligned.
2087 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2089 if (addr == MAP_FAILED) {
2090 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
2091 return RTE_VHOST_MSG_RESULT_ERR;
2095 * Free previously mapped log memory on occasionally
2096 * multiple VHOST_USER_SET_LOG_BASE.
2098 if (dev->log_addr) {
2099 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
2101 dev->log_addr = (uint64_t)(uintptr_t)addr;
2102 dev->log_base = dev->log_addr + off;
2103 dev->log_size = size;
2106 * The spec is not clear about it (yet), but QEMU doesn't expect
2107 * any payload in the reply.
2112 return RTE_VHOST_MSG_RESULT_REPLY;
2115 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
2116 struct VhostUserMsg *msg,
2117 int main_fd __rte_unused)
2119 if (validate_msg_fds(msg, 1) != 0)
2120 return RTE_VHOST_MSG_RESULT_ERR;
2123 VHOST_LOG_CONFIG(INFO, "not implemented.\n");
2125 return RTE_VHOST_MSG_RESULT_OK;
2129 * An rarp packet is constructed and broadcasted to notify switches about
2130 * the new location of the migrated VM, so that packets from outside will
2131 * not be lost after migration.
2133 * However, we don't actually "send" a rarp packet here, instead, we set
2134 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
2137 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
2138 int main_fd __rte_unused)
2140 struct virtio_net *dev = *pdev;
2141 uint8_t *mac = (uint8_t *)&msg->payload.u64;
2142 struct rte_vdpa_device *vdpa_dev;
2144 if (validate_msg_fds(msg, 0) != 0)
2145 return RTE_VHOST_MSG_RESULT_ERR;
2147 VHOST_LOG_CONFIG(DEBUG,
2148 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
2149 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2150 memcpy(dev->mac.addr_bytes, mac, 6);
2153 * Set the flag to inject a RARP broadcast packet at
2154 * rte_vhost_dequeue_burst().
2156 * __ATOMIC_RELEASE ordering is for making sure the mac is
2157 * copied before the flag is set.
2159 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
2160 vdpa_dev = dev->vdpa_dev;
2161 if (vdpa_dev && vdpa_dev->ops->migration_done)
2162 vdpa_dev->ops->migration_done(dev->vid);
2164 return RTE_VHOST_MSG_RESULT_OK;
2168 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
2169 int main_fd __rte_unused)
2171 struct virtio_net *dev = *pdev;
2173 if (validate_msg_fds(msg, 0) != 0)
2174 return RTE_VHOST_MSG_RESULT_ERR;
2176 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
2177 msg->payload.u64 > VIRTIO_MAX_MTU) {
2178 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
2181 return RTE_VHOST_MSG_RESULT_ERR;
2184 dev->mtu = msg->payload.u64;
2186 return RTE_VHOST_MSG_RESULT_OK;
2190 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
2191 int main_fd __rte_unused)
2193 struct virtio_net *dev = *pdev;
2194 int fd = msg->fds[0];
2196 if (validate_msg_fds(msg, 1) != 0)
2197 return RTE_VHOST_MSG_RESULT_ERR;
2200 VHOST_LOG_CONFIG(ERR,
2201 "Invalid file descriptor for slave channel (%d)\n",
2203 return RTE_VHOST_MSG_RESULT_ERR;
2206 if (dev->slave_req_fd >= 0)
2207 close(dev->slave_req_fd);
2209 dev->slave_req_fd = fd;
2211 return RTE_VHOST_MSG_RESULT_OK;
2215 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2217 struct vhost_vring_addr *ra;
2218 uint64_t start, end, len;
2221 end = start + imsg->size;
2223 ra = &vq->ring_addrs;
2224 len = sizeof(struct vring_desc) * vq->size;
2225 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2228 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
2229 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2232 len = sizeof(struct vring_used) +
2233 sizeof(struct vring_used_elem) * vq->size;
2234 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2237 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2238 len = sizeof(uint64_t);
2239 if (ra->log_guest_addr < end &&
2240 (ra->log_guest_addr + len) > start)
2248 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2250 struct vhost_vring_addr *ra;
2251 uint64_t start, end, len;
2254 end = start + imsg->size;
2256 ra = &vq->ring_addrs;
2257 len = sizeof(struct vring_packed_desc) * vq->size;
2258 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2261 len = sizeof(struct vring_packed_desc_event);
2262 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2265 len = sizeof(struct vring_packed_desc_event);
2266 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2269 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2270 len = sizeof(uint64_t);
2271 if (ra->log_guest_addr < end &&
2272 (ra->log_guest_addr + len) > start)
2279 static int is_vring_iotlb(struct virtio_net *dev,
2280 struct vhost_virtqueue *vq,
2281 struct vhost_iotlb_msg *imsg)
2283 if (vq_is_packed(dev))
2284 return is_vring_iotlb_packed(vq, imsg);
2286 return is_vring_iotlb_split(vq, imsg);
2290 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
2291 int main_fd __rte_unused)
2293 struct virtio_net *dev = *pdev;
2294 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
2298 if (validate_msg_fds(msg, 0) != 0)
2299 return RTE_VHOST_MSG_RESULT_ERR;
2301 switch (imsg->type) {
2302 case VHOST_IOTLB_UPDATE:
2304 vva = qva_to_vva(dev, imsg->uaddr, &len);
2306 return RTE_VHOST_MSG_RESULT_ERR;
2308 for (i = 0; i < dev->nr_vring; i++) {
2309 struct vhost_virtqueue *vq = dev->virtqueue[i];
2311 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
2314 if (is_vring_iotlb(dev, vq, imsg))
2315 *pdev = dev = translate_ring_addresses(dev, i);
2318 case VHOST_IOTLB_INVALIDATE:
2319 for (i = 0; i < dev->nr_vring; i++) {
2320 struct vhost_virtqueue *vq = dev->virtqueue[i];
2322 vhost_user_iotlb_cache_remove(vq, imsg->iova,
2325 if (is_vring_iotlb(dev, vq, imsg))
2326 vring_invalidate(dev, vq);
2330 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
2332 return RTE_VHOST_MSG_RESULT_ERR;
2335 return RTE_VHOST_MSG_RESULT_OK;
2339 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
2340 struct VhostUserMsg *msg,
2341 int main_fd __rte_unused)
2343 struct virtio_net *dev = *pdev;
2344 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
2345 struct uffdio_api api_struct;
2347 if (validate_msg_fds(msg, 0) != 0)
2348 return RTE_VHOST_MSG_RESULT_ERR;
2350 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
2352 if (dev->postcopy_ufd == -1) {
2353 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
2355 return RTE_VHOST_MSG_RESULT_ERR;
2357 api_struct.api = UFFD_API;
2358 api_struct.features = 0;
2359 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
2360 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
2362 close(dev->postcopy_ufd);
2363 dev->postcopy_ufd = -1;
2364 return RTE_VHOST_MSG_RESULT_ERR;
2366 msg->fds[0] = dev->postcopy_ufd;
2369 return RTE_VHOST_MSG_RESULT_REPLY;
2371 dev->postcopy_ufd = -1;
2374 return RTE_VHOST_MSG_RESULT_ERR;
2379 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
2380 struct VhostUserMsg *msg __rte_unused,
2381 int main_fd __rte_unused)
2383 struct virtio_net *dev = *pdev;
2385 if (validate_msg_fds(msg, 0) != 0)
2386 return RTE_VHOST_MSG_RESULT_ERR;
2388 if (dev->mem && dev->mem->nregions) {
2389 VHOST_LOG_CONFIG(ERR,
2390 "Regions already registered at postcopy-listen\n");
2391 return RTE_VHOST_MSG_RESULT_ERR;
2393 dev->postcopy_listening = 1;
2395 return RTE_VHOST_MSG_RESULT_OK;
2399 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
2400 int main_fd __rte_unused)
2402 struct virtio_net *dev = *pdev;
2404 if (validate_msg_fds(msg, 0) != 0)
2405 return RTE_VHOST_MSG_RESULT_ERR;
2407 dev->postcopy_listening = 0;
2408 if (dev->postcopy_ufd >= 0) {
2409 close(dev->postcopy_ufd);
2410 dev->postcopy_ufd = -1;
2413 msg->payload.u64 = 0;
2414 msg->size = sizeof(msg->payload.u64);
2417 return RTE_VHOST_MSG_RESULT_REPLY;
2421 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2422 int main_fd __rte_unused)
2424 struct virtio_net *dev = *pdev;
2426 if (validate_msg_fds(msg, 0) != 0)
2427 return RTE_VHOST_MSG_RESULT_ERR;
2429 msg->payload.u64 = dev->status;
2430 msg->size = sizeof(msg->payload.u64);
2433 return RTE_VHOST_MSG_RESULT_REPLY;
2437 vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2438 int main_fd __rte_unused)
2440 struct virtio_net *dev = *pdev;
2442 if (validate_msg_fds(msg, 0) != 0)
2443 return RTE_VHOST_MSG_RESULT_ERR;
2445 /* As per Virtio specification, the device status is 8bits long */
2446 if (msg->payload.u64 > UINT8_MAX) {
2447 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
2449 return RTE_VHOST_MSG_RESULT_ERR;
2452 dev->status = msg->payload.u64;
2454 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
2455 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
2456 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
2458 * Clear the bit to let the driver know about the feature
2459 * negotiation failure
2461 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
2464 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
2466 "\t-ACKNOWLEDGE: %u\n"
2468 "\t-FEATURES_OK: %u\n"
2469 "\t-DRIVER_OK: %u\n"
2470 "\t-DEVICE_NEED_RESET: %u\n"
2473 (dev->status == VIRTIO_DEVICE_STATUS_RESET),
2474 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
2475 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
2476 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
2477 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
2478 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
2479 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
2481 return RTE_VHOST_MSG_RESULT_OK;
2484 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
2485 struct VhostUserMsg *msg,
2487 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
2488 [VHOST_USER_NONE] = NULL,
2489 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
2490 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
2491 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
2492 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
2493 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
2494 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
2495 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
2496 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
2497 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
2498 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
2499 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
2500 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
2501 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
2502 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
2503 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
2504 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
2505 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
2506 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
2507 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
2508 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
2509 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
2510 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
2511 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
2512 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
2513 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
2514 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
2515 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
2516 [VHOST_USER_SET_STATUS] = vhost_user_set_status,
2517 [VHOST_USER_GET_STATUS] = vhost_user_get_status,
2520 /* return bytes# of read on success or negative val on failure. */
2522 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
2526 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
2527 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
2530 } else if (ret != VHOST_USER_HDR_SIZE) {
2531 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
2537 if (msg->size > sizeof(msg->payload)) {
2538 VHOST_LOG_CONFIG(ERR,
2539 "invalid msg size: %d\n", msg->size);
2542 ret = read(sockfd, &msg->payload, msg->size);
2545 if (ret != (int)msg->size) {
2546 VHOST_LOG_CONFIG(ERR,
2547 "read control message failed\n");
2556 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
2561 return send_fd_message(sockfd, (char *)msg,
2562 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
2566 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
2571 msg->flags &= ~VHOST_USER_VERSION_MASK;
2572 msg->flags &= ~VHOST_USER_NEED_REPLY;
2573 msg->flags |= VHOST_USER_VERSION;
2574 msg->flags |= VHOST_USER_REPLY_MASK;
2576 return send_vhost_message(sockfd, msg);
2580 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
2584 if (msg->flags & VHOST_USER_NEED_REPLY)
2585 rte_spinlock_lock(&dev->slave_req_lock);
2587 ret = send_vhost_message(dev->slave_req_fd, msg);
2588 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
2589 rte_spinlock_unlock(&dev->slave_req_lock);
2595 * Allocate a queue pair if it hasn't been allocated yet
2598 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
2599 struct VhostUserMsg *msg)
2603 switch (msg->request.master) {
2604 case VHOST_USER_SET_VRING_KICK:
2605 case VHOST_USER_SET_VRING_CALL:
2606 case VHOST_USER_SET_VRING_ERR:
2607 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
2609 case VHOST_USER_SET_VRING_NUM:
2610 case VHOST_USER_SET_VRING_BASE:
2611 case VHOST_USER_SET_VRING_ENABLE:
2612 vring_idx = msg->payload.state.index;
2614 case VHOST_USER_SET_VRING_ADDR:
2615 vring_idx = msg->payload.addr.index;
2621 if (vring_idx >= VHOST_MAX_VRING) {
2622 VHOST_LOG_CONFIG(ERR,
2623 "invalid vring index: %u\n", vring_idx);
2627 if (dev->virtqueue[vring_idx])
2630 return alloc_vring_queue(dev, vring_idx);
2634 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
2637 unsigned int vq_num = 0;
2639 while (vq_num < dev->nr_vring) {
2640 struct vhost_virtqueue *vq = dev->virtqueue[i];
2643 rte_spinlock_lock(&vq->access_lock);
2651 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
2654 unsigned int vq_num = 0;
2656 while (vq_num < dev->nr_vring) {
2657 struct vhost_virtqueue *vq = dev->virtqueue[i];
2660 rte_spinlock_unlock(&vq->access_lock);
2668 vhost_user_msg_handler(int vid, int fd)
2670 struct virtio_net *dev;
2671 struct VhostUserMsg msg;
2672 struct rte_vdpa_device *vdpa_dev;
2674 int unlock_required = 0;
2679 dev = get_device(vid);
2683 if (!dev->notify_ops) {
2684 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2685 if (!dev->notify_ops) {
2686 VHOST_LOG_CONFIG(ERR,
2687 "failed to get callback ops for driver %s\n",
2693 ret = read_vhost_message(fd, &msg);
2696 VHOST_LOG_CONFIG(ERR,
2697 "vhost read message failed\n");
2699 VHOST_LOG_CONFIG(INFO,
2700 "vhost peer closed\n");
2706 request = msg.request.master;
2707 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2708 vhost_message_str[request]) {
2709 if (request != VHOST_USER_IOTLB_MSG)
2710 VHOST_LOG_CONFIG(INFO, "read message %s\n",
2711 vhost_message_str[request]);
2713 VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
2714 vhost_message_str[request]);
2716 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
2719 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2721 VHOST_LOG_CONFIG(ERR,
2722 "failed to alloc queue\n");
2727 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2728 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2729 * and device is destroyed. destroy_device waits for queues to be
2730 * inactive, so it is safe. Otherwise taking the access_lock
2731 * would cause a dead lock.
2734 case VHOST_USER_SET_FEATURES:
2735 case VHOST_USER_SET_PROTOCOL_FEATURES:
2736 case VHOST_USER_SET_OWNER:
2737 case VHOST_USER_SET_MEM_TABLE:
2738 case VHOST_USER_SET_LOG_BASE:
2739 case VHOST_USER_SET_LOG_FD:
2740 case VHOST_USER_SET_VRING_NUM:
2741 case VHOST_USER_SET_VRING_ADDR:
2742 case VHOST_USER_SET_VRING_BASE:
2743 case VHOST_USER_SET_VRING_KICK:
2744 case VHOST_USER_SET_VRING_CALL:
2745 case VHOST_USER_SET_VRING_ERR:
2746 case VHOST_USER_SET_VRING_ENABLE:
2747 case VHOST_USER_SEND_RARP:
2748 case VHOST_USER_NET_SET_MTU:
2749 case VHOST_USER_SET_SLAVE_REQ_FD:
2750 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2751 vhost_user_lock_all_queue_pairs(dev);
2752 unlock_required = 1;
2761 if (dev->extern_ops.pre_msg_handle) {
2762 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2765 case RTE_VHOST_MSG_RESULT_REPLY:
2766 send_vhost_reply(fd, &msg);
2768 case RTE_VHOST_MSG_RESULT_ERR:
2769 case RTE_VHOST_MSG_RESULT_OK:
2771 goto skip_to_post_handle;
2772 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2778 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2779 if (!vhost_message_handlers[request])
2780 goto skip_to_post_handle;
2781 ret = vhost_message_handlers[request](&dev, &msg, fd);
2784 case RTE_VHOST_MSG_RESULT_ERR:
2785 VHOST_LOG_CONFIG(ERR,
2786 "Processing %s failed.\n",
2787 vhost_message_str[request]);
2790 case RTE_VHOST_MSG_RESULT_OK:
2791 VHOST_LOG_CONFIG(DEBUG,
2792 "Processing %s succeeded.\n",
2793 vhost_message_str[request]);
2796 case RTE_VHOST_MSG_RESULT_REPLY:
2797 VHOST_LOG_CONFIG(DEBUG,
2798 "Processing %s succeeded and needs reply.\n",
2799 vhost_message_str[request]);
2800 send_vhost_reply(fd, &msg);
2808 skip_to_post_handle:
2809 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2810 dev->extern_ops.post_msg_handle) {
2811 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2814 case RTE_VHOST_MSG_RESULT_REPLY:
2815 send_vhost_reply(fd, &msg);
2817 case RTE_VHOST_MSG_RESULT_ERR:
2818 case RTE_VHOST_MSG_RESULT_OK:
2820 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2826 if (unlock_required)
2827 vhost_user_unlock_all_queue_pairs(dev);
2829 /* If message was not handled at this stage, treat it as an error */
2831 VHOST_LOG_CONFIG(ERR,
2832 "vhost message (req: %d) was not handled.\n", request);
2833 close_msg_fds(&msg);
2834 ret = RTE_VHOST_MSG_RESULT_ERR;
2838 * If the request required a reply that was already sent,
2839 * this optional reply-ack won't be sent as the
2840 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2842 if (msg.flags & VHOST_USER_NEED_REPLY) {
2843 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2844 msg.size = sizeof(msg.payload.u64);
2846 send_vhost_reply(fd, &msg);
2847 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2848 VHOST_LOG_CONFIG(ERR,
2849 "vhost message handling failed.\n");
2853 for (i = 0; i < dev->nr_vring; i++) {
2854 struct vhost_virtqueue *vq = dev->virtqueue[i];
2855 bool cur_ready = vq_is_ready(dev, vq);
2857 if (cur_ready != (vq && vq->ready)) {
2858 vq->ready = cur_ready;
2859 vhost_user_notify_queue_state(dev, i, cur_ready);
2864 if (!virtio_is_ready(dev))
2868 * Virtio is now ready. If not done already, it is time
2869 * to notify the application it can process the rings and
2870 * configure the vDPA device if present.
2873 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
2874 if (dev->notify_ops->new_device(dev->vid) == 0)
2875 dev->flags |= VIRTIO_DEV_RUNNING;
2878 vdpa_dev = dev->vdpa_dev;
2882 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2883 if (vdpa_dev->ops->dev_conf(dev->vid))
2884 VHOST_LOG_CONFIG(ERR,
2885 "Failed to configure vDPA device\n");
2887 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
2894 static int process_slave_message_reply(struct virtio_net *dev,
2895 const struct VhostUserMsg *msg)
2897 struct VhostUserMsg msg_reply;
2900 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
2903 ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
2906 VHOST_LOG_CONFIG(ERR,
2907 "vhost read slave message reply failed\n");
2909 VHOST_LOG_CONFIG(INFO,
2910 "vhost peer closed\n");
2916 if (msg_reply.request.slave != msg->request.slave) {
2917 VHOST_LOG_CONFIG(ERR,
2918 "Received unexpected msg type (%u), expected %u\n",
2919 msg_reply.request.slave, msg->request.slave);
2924 ret = msg_reply.payload.u64 ? -1 : 0;
2927 rte_spinlock_unlock(&dev->slave_req_lock);
2932 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
2935 struct VhostUserMsg msg = {
2936 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
2937 .flags = VHOST_USER_VERSION,
2938 .size = sizeof(msg.payload.iotlb),
2942 .type = VHOST_IOTLB_MISS,
2946 ret = send_vhost_message(dev->slave_req_fd, &msg);
2948 VHOST_LOG_CONFIG(ERR,
2949 "Failed to send IOTLB miss message (%d)\n",
2958 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
2961 struct VhostUserMsg msg = {
2962 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
2963 .flags = VHOST_USER_VERSION,
2968 msg.flags |= VHOST_USER_NEED_REPLY;
2970 ret = send_vhost_slave_message(dev, &msg);
2972 VHOST_LOG_CONFIG(ERR,
2973 "Failed to send config change (%d)\n",
2978 return process_slave_message_reply(dev, &msg);
2982 rte_vhost_slave_config_change(int vid, bool need_reply)
2984 struct virtio_net *dev;
2986 dev = get_device(vid);
2990 return vhost_user_slave_config_change(dev, need_reply);
2993 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
2999 struct VhostUserMsg msg = {
3000 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
3001 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
3002 .size = sizeof(msg.payload.area),
3004 .u64 = index & VHOST_USER_VRING_IDX_MASK,
3011 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
3017 ret = send_vhost_slave_message(dev, &msg);
3019 VHOST_LOG_CONFIG(ERR,
3020 "Failed to set host notifier (%d)\n", ret);
3024 return process_slave_message_reply(dev, &msg);
3027 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
3029 struct virtio_net *dev;
3030 struct rte_vdpa_device *vdpa_dev;
3031 int vfio_device_fd, ret = 0;
3032 uint64_t offset, size;
3033 unsigned int i, q_start, q_last;
3035 dev = get_device(vid);
3039 vdpa_dev = dev->vdpa_dev;
3040 if (vdpa_dev == NULL)
3043 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
3044 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
3045 !(dev->protocol_features &
3046 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
3047 !(dev->protocol_features &
3048 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
3049 !(dev->protocol_features &
3050 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
3053 if (qid == RTE_VHOST_QUEUE_ALL) {
3055 q_last = dev->nr_vring - 1;
3057 if (qid >= dev->nr_vring)
3063 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
3064 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
3066 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
3067 if (vfio_device_fd < 0)
3071 for (i = q_start; i <= q_last; i++) {
3072 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
3078 if (vhost_user_slave_set_vring_host_notifier(dev, i,
3079 vfio_device_fd, offset, size) < 0) {
3086 for (i = q_start; i <= q_last; i++) {
3087 vhost_user_slave_set_vring_host_notifier(dev, i, -1,