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 * Reclaim all the outstanding zmbufs for a virtqueue.
141 drain_zmbuf_list(struct vhost_virtqueue *vq)
143 struct zcopy_mbuf *zmbuf, *next;
145 for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
146 zmbuf != NULL; zmbuf = next) {
147 next = TAILQ_NEXT(zmbuf, next);
149 while (!mbuf_is_consumed(zmbuf->mbuf))
152 TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
153 restore_mbuf(zmbuf->mbuf);
154 rte_pktmbuf_free(zmbuf->mbuf);
161 free_mem_region(struct virtio_net *dev)
164 struct rte_vhost_mem_region *reg;
165 struct vhost_virtqueue *vq;
167 if (!dev || !dev->mem)
170 if (dev->dequeue_zero_copy) {
171 for (i = 0; i < dev->nr_vring; i++) {
172 vq = dev->virtqueue[i];
174 drain_zmbuf_list(vq);
178 for (i = 0; i < dev->mem->nregions; i++) {
179 reg = &dev->mem->regions[i];
180 if (reg->host_user_addr) {
181 munmap(reg->mmap_addr, reg->mmap_size);
188 vhost_backend_cleanup(struct virtio_net *dev)
191 free_mem_region(dev);
196 rte_free(dev->guest_pages);
197 dev->guest_pages = NULL;
200 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
204 if (dev->inflight_info) {
205 if (dev->inflight_info->addr) {
206 munmap(dev->inflight_info->addr,
207 dev->inflight_info->size);
208 dev->inflight_info->addr = NULL;
211 if (dev->inflight_info->fd >= 0) {
212 close(dev->inflight_info->fd);
213 dev->inflight_info->fd = -1;
216 free(dev->inflight_info);
217 dev->inflight_info = NULL;
220 if (dev->slave_req_fd >= 0) {
221 close(dev->slave_req_fd);
222 dev->slave_req_fd = -1;
225 if (dev->postcopy_ufd >= 0) {
226 close(dev->postcopy_ufd);
227 dev->postcopy_ufd = -1;
230 dev->postcopy_listening = 0;
234 vhost_user_notify_queue_state(struct virtio_net *dev, uint16_t index,
237 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
239 if (vdpa_dev && vdpa_dev->ops->set_vring_state)
240 vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
242 if (dev->notify_ops->vring_state_changed)
243 dev->notify_ops->vring_state_changed(dev->vid,
248 * This function just returns success at the moment unless
249 * the device hasn't been initialised.
252 vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
253 struct VhostUserMsg *msg,
254 int main_fd __rte_unused)
256 if (validate_msg_fds(msg, 0) != 0)
257 return RTE_VHOST_MSG_RESULT_ERR;
259 return RTE_VHOST_MSG_RESULT_OK;
263 vhost_user_reset_owner(struct virtio_net **pdev,
264 struct VhostUserMsg *msg,
265 int main_fd __rte_unused)
267 struct virtio_net *dev = *pdev;
269 if (validate_msg_fds(msg, 0) != 0)
270 return RTE_VHOST_MSG_RESULT_ERR;
272 vhost_destroy_device_notify(dev);
274 cleanup_device(dev, 0);
276 return RTE_VHOST_MSG_RESULT_OK;
280 * The features that we support are requested.
283 vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
284 int main_fd __rte_unused)
286 struct virtio_net *dev = *pdev;
287 uint64_t features = 0;
289 if (validate_msg_fds(msg, 0) != 0)
290 return RTE_VHOST_MSG_RESULT_ERR;
292 rte_vhost_driver_get_features(dev->ifname, &features);
294 msg->payload.u64 = features;
295 msg->size = sizeof(msg->payload.u64);
298 return RTE_VHOST_MSG_RESULT_REPLY;
302 * The queue number that we support are requested.
305 vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
306 int main_fd __rte_unused)
308 struct virtio_net *dev = *pdev;
309 uint32_t queue_num = 0;
311 if (validate_msg_fds(msg, 0) != 0)
312 return RTE_VHOST_MSG_RESULT_ERR;
314 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
316 msg->payload.u64 = (uint64_t)queue_num;
317 msg->size = sizeof(msg->payload.u64);
320 return RTE_VHOST_MSG_RESULT_REPLY;
324 * We receive the negotiated features supported by us and the virtio device.
327 vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
328 int main_fd __rte_unused)
330 struct virtio_net *dev = *pdev;
331 uint64_t features = msg->payload.u64;
332 uint64_t vhost_features = 0;
333 struct rte_vdpa_device *vdpa_dev;
335 if (validate_msg_fds(msg, 0) != 0)
336 return RTE_VHOST_MSG_RESULT_ERR;
338 rte_vhost_driver_get_features(dev->ifname, &vhost_features);
339 if (features & ~vhost_features) {
340 VHOST_LOG_CONFIG(ERR,
341 "(%d) received invalid negotiated features.\n",
343 dev->flags |= VIRTIO_DEV_FEATURES_FAILED;
344 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
346 return RTE_VHOST_MSG_RESULT_ERR;
349 if (dev->flags & VIRTIO_DEV_RUNNING) {
350 if (dev->features == features)
351 return RTE_VHOST_MSG_RESULT_OK;
354 * Error out if master tries to change features while device is
355 * in running state. The exception being VHOST_F_LOG_ALL, which
356 * is enabled when the live-migration starts.
358 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
359 VHOST_LOG_CONFIG(ERR,
360 "(%d) features changed while device is running.\n",
362 return RTE_VHOST_MSG_RESULT_ERR;
365 if (dev->notify_ops->features_changed)
366 dev->notify_ops->features_changed(dev->vid, features);
369 dev->features = features;
371 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
372 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
374 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
376 VHOST_LOG_CONFIG(INFO,
377 "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
378 VHOST_LOG_CONFIG(DEBUG,
379 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
381 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
382 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
384 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
385 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
387 * Remove all but first queue pair if MQ hasn't been
388 * negotiated. This is safe because the device is not
389 * running at this stage.
391 while (dev->nr_vring > 2) {
392 struct vhost_virtqueue *vq;
394 vq = dev->virtqueue[--dev->nr_vring];
398 dev->virtqueue[dev->nr_vring] = NULL;
400 cleanup_vq_inflight(dev, vq);
405 vdpa_dev = dev->vdpa_dev;
407 vdpa_dev->ops->set_features(dev->vid);
409 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED;
410 return RTE_VHOST_MSG_RESULT_OK;
414 * The virtio device sends us the size of the descriptor ring.
417 vhost_user_set_vring_num(struct virtio_net **pdev,
418 struct VhostUserMsg *msg,
419 int main_fd __rte_unused)
421 struct virtio_net *dev = *pdev;
422 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
424 if (validate_msg_fds(msg, 0) != 0)
425 return RTE_VHOST_MSG_RESULT_ERR;
427 vq->size = msg->payload.state.num;
429 /* VIRTIO 1.0, 2.4 Virtqueues says:
431 * Queue Size value is always a power of 2. The maximum Queue Size
434 * VIRTIO 1.1 2.7 Virtqueues says:
436 * Packed virtqueues support up to 2^15 entries each.
438 if (!vq_is_packed(dev)) {
439 if (vq->size & (vq->size - 1)) {
440 VHOST_LOG_CONFIG(ERR,
441 "invalid virtqueue size %u\n", vq->size);
442 return RTE_VHOST_MSG_RESULT_ERR;
446 if (vq->size > 32768) {
447 VHOST_LOG_CONFIG(ERR,
448 "invalid virtqueue size %u\n", vq->size);
449 return RTE_VHOST_MSG_RESULT_ERR;
452 if (dev->dequeue_zero_copy) {
454 vq->last_zmbuf_idx = 0;
455 vq->zmbuf_size = vq->size;
457 rte_free(vq->zmbufs);
458 vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
459 sizeof(struct zcopy_mbuf), 0);
460 if (vq->zmbufs == NULL) {
461 VHOST_LOG_CONFIG(WARNING,
462 "failed to allocate mem for zero copy; "
463 "zero copy is force disabled\n");
464 dev->dequeue_zero_copy = 0;
466 TAILQ_INIT(&vq->zmbuf_list);
469 if (vq_is_packed(dev)) {
470 if (vq->shadow_used_packed)
471 rte_free(vq->shadow_used_packed);
472 vq->shadow_used_packed = rte_malloc(NULL,
474 sizeof(struct vring_used_elem_packed),
475 RTE_CACHE_LINE_SIZE);
476 if (!vq->shadow_used_packed) {
477 VHOST_LOG_CONFIG(ERR,
478 "failed to allocate memory for shadow used ring.\n");
479 return RTE_VHOST_MSG_RESULT_ERR;
483 if (vq->shadow_used_split)
484 rte_free(vq->shadow_used_split);
486 vq->shadow_used_split = rte_malloc(NULL,
487 vq->size * sizeof(struct vring_used_elem),
488 RTE_CACHE_LINE_SIZE);
490 if (!vq->shadow_used_split) {
491 VHOST_LOG_CONFIG(ERR,
492 "failed to allocate memory for vq internal data.\n");
493 return RTE_VHOST_MSG_RESULT_ERR;
497 if (vq->batch_copy_elems)
498 rte_free(vq->batch_copy_elems);
499 vq->batch_copy_elems = rte_malloc(NULL,
500 vq->size * sizeof(struct batch_copy_elem),
501 RTE_CACHE_LINE_SIZE);
502 if (!vq->batch_copy_elems) {
503 VHOST_LOG_CONFIG(ERR,
504 "failed to allocate memory for batching copy.\n");
505 return RTE_VHOST_MSG_RESULT_ERR;
508 return RTE_VHOST_MSG_RESULT_OK;
512 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
513 * same numa node as the memory of vring descriptor.
515 #ifdef RTE_LIBRTE_VHOST_NUMA
516 static struct virtio_net*
517 numa_realloc(struct virtio_net *dev, int index)
519 int oldnode, newnode;
520 struct virtio_net *old_dev;
521 struct vhost_virtqueue *old_vq, *vq;
522 struct zcopy_mbuf *new_zmbuf;
523 struct vring_used_elem *new_shadow_used_split;
524 struct vring_used_elem_packed *new_shadow_used_packed;
525 struct batch_copy_elem *new_batch_copy_elems;
528 if (dev->flags & VIRTIO_DEV_RUNNING)
532 vq = old_vq = dev->virtqueue[index];
534 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
535 MPOL_F_NODE | MPOL_F_ADDR);
537 /* check if we need to reallocate vq */
538 ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
539 MPOL_F_NODE | MPOL_F_ADDR);
541 VHOST_LOG_CONFIG(ERR,
542 "Unable to get vq numa information.\n");
545 if (oldnode != newnode) {
546 VHOST_LOG_CONFIG(INFO,
547 "reallocate vq from %d to %d node\n", oldnode, newnode);
548 vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
552 memcpy(vq, old_vq, sizeof(*vq));
553 TAILQ_INIT(&vq->zmbuf_list);
555 if (dev->dequeue_zero_copy) {
556 new_zmbuf = rte_malloc_socket(NULL, vq->zmbuf_size *
557 sizeof(struct zcopy_mbuf), 0, newnode);
559 rte_free(vq->zmbufs);
560 vq->zmbufs = new_zmbuf;
564 if (vq_is_packed(dev)) {
565 new_shadow_used_packed = rte_malloc_socket(NULL,
567 sizeof(struct vring_used_elem_packed),
570 if (new_shadow_used_packed) {
571 rte_free(vq->shadow_used_packed);
572 vq->shadow_used_packed = new_shadow_used_packed;
575 new_shadow_used_split = rte_malloc_socket(NULL,
577 sizeof(struct vring_used_elem),
580 if (new_shadow_used_split) {
581 rte_free(vq->shadow_used_split);
582 vq->shadow_used_split = new_shadow_used_split;
586 new_batch_copy_elems = rte_malloc_socket(NULL,
587 vq->size * sizeof(struct batch_copy_elem),
590 if (new_batch_copy_elems) {
591 rte_free(vq->batch_copy_elems);
592 vq->batch_copy_elems = new_batch_copy_elems;
598 /* check if we need to reallocate dev */
599 ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
600 MPOL_F_NODE | MPOL_F_ADDR);
602 VHOST_LOG_CONFIG(ERR,
603 "Unable to get dev numa information.\n");
606 if (oldnode != newnode) {
607 VHOST_LOG_CONFIG(INFO,
608 "reallocate dev from %d to %d node\n",
610 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
616 memcpy(dev, old_dev, sizeof(*dev));
621 dev->virtqueue[index] = vq;
622 vhost_devices[dev->vid] = dev;
625 vhost_user_iotlb_init(dev, index);
630 static struct virtio_net*
631 numa_realloc(struct virtio_net *dev, int index __rte_unused)
637 /* Converts QEMU virtual address to Vhost virtual address. */
639 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
641 struct rte_vhost_mem_region *r;
644 if (unlikely(!dev || !dev->mem))
647 /* Find the region where the address lives. */
648 for (i = 0; i < dev->mem->nregions; i++) {
649 r = &dev->mem->regions[i];
651 if (qva >= r->guest_user_addr &&
652 qva < r->guest_user_addr + r->size) {
654 if (unlikely(*len > r->guest_user_addr + r->size - qva))
655 *len = r->guest_user_addr + r->size - qva;
657 return qva - r->guest_user_addr +
669 * Converts ring address to Vhost virtual address.
670 * If IOMMU is enabled, the ring address is a guest IO virtual address,
671 * else it is a QEMU virtual address.
674 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
675 uint64_t ra, uint64_t *size)
677 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
680 vhost_user_iotlb_rd_lock(vq);
681 vva = vhost_iova_to_vva(dev, vq, ra,
682 size, VHOST_ACCESS_RW);
683 vhost_user_iotlb_rd_unlock(vq);
688 return qva_to_vva(dev, ra, size);
692 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
696 vhost_user_iotlb_rd_lock(vq);
697 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
698 vhost_user_iotlb_rd_unlock(vq);
703 static struct virtio_net *
704 translate_ring_addresses(struct virtio_net *dev, int vq_index)
706 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
707 struct vhost_vring_addr *addr = &vq->ring_addrs;
708 uint64_t len, expected_len;
710 if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
712 log_addr_to_gpa(dev, vq);
713 if (vq->log_guest_addr == 0) {
714 VHOST_LOG_CONFIG(DEBUG,
715 "(%d) failed to map log_guest_addr.\n",
721 if (vq_is_packed(dev)) {
722 len = sizeof(struct vring_packed_desc) * vq->size;
723 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
724 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
725 if (vq->desc_packed == NULL ||
726 len != sizeof(struct vring_packed_desc) *
728 VHOST_LOG_CONFIG(DEBUG,
729 "(%d) failed to map desc_packed ring.\n",
734 dev = numa_realloc(dev, vq_index);
735 vq = dev->virtqueue[vq_index];
736 addr = &vq->ring_addrs;
738 len = sizeof(struct vring_packed_desc_event);
739 vq->driver_event = (struct vring_packed_desc_event *)
740 (uintptr_t)ring_addr_to_vva(dev,
741 vq, addr->avail_user_addr, &len);
742 if (vq->driver_event == NULL ||
743 len != sizeof(struct vring_packed_desc_event)) {
744 VHOST_LOG_CONFIG(DEBUG,
745 "(%d) failed to find driver area address.\n",
750 len = sizeof(struct vring_packed_desc_event);
751 vq->device_event = (struct vring_packed_desc_event *)
752 (uintptr_t)ring_addr_to_vva(dev,
753 vq, addr->used_user_addr, &len);
754 if (vq->device_event == NULL ||
755 len != sizeof(struct vring_packed_desc_event)) {
756 VHOST_LOG_CONFIG(DEBUG,
757 "(%d) failed to find device area address.\n",
766 /* The addresses are converted from QEMU virtual to Vhost virtual. */
767 if (vq->desc && vq->avail && vq->used)
770 len = sizeof(struct vring_desc) * vq->size;
771 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
772 vq, addr->desc_user_addr, &len);
773 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
774 VHOST_LOG_CONFIG(DEBUG,
775 "(%d) failed to map desc ring.\n",
780 dev = numa_realloc(dev, vq_index);
781 vq = dev->virtqueue[vq_index];
782 addr = &vq->ring_addrs;
784 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
785 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
786 len += sizeof(uint16_t);
788 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
789 vq, addr->avail_user_addr, &len);
790 if (vq->avail == 0 || len != expected_len) {
791 VHOST_LOG_CONFIG(DEBUG,
792 "(%d) failed to map avail ring.\n",
797 len = sizeof(struct vring_used) +
798 sizeof(struct vring_used_elem) * vq->size;
799 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
800 len += sizeof(uint16_t);
802 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
803 vq, addr->used_user_addr, &len);
804 if (vq->used == 0 || len != expected_len) {
805 VHOST_LOG_CONFIG(DEBUG,
806 "(%d) failed to map used ring.\n",
811 if (vq->last_used_idx != vq->used->idx) {
812 VHOST_LOG_CONFIG(WARNING,
813 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
814 "some packets maybe resent for Tx and dropped for Rx\n",
815 vq->last_used_idx, vq->used->idx);
816 vq->last_used_idx = vq->used->idx;
817 vq->last_avail_idx = vq->used->idx;
822 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
824 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
825 dev->vid, vq->avail);
826 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
828 VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
829 dev->vid, vq->log_guest_addr);
835 * The virtio device sends us the desc, used and avail ring addresses.
836 * This function then converts these to our address space.
839 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
840 int main_fd __rte_unused)
842 struct virtio_net *dev = *pdev;
843 struct vhost_virtqueue *vq;
844 struct vhost_vring_addr *addr = &msg->payload.addr;
847 if (validate_msg_fds(msg, 0) != 0)
848 return RTE_VHOST_MSG_RESULT_ERR;
850 if (dev->mem == NULL)
851 return RTE_VHOST_MSG_RESULT_ERR;
853 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
854 vq = dev->virtqueue[msg->payload.addr.index];
856 access_ok = vq->access_ok;
859 * Rings addresses should not be interpreted as long as the ring is not
860 * started and enabled
862 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
864 vring_invalidate(dev, vq);
866 if ((vq->enabled && (dev->features &
867 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
869 dev = translate_ring_addresses(dev, msg->payload.addr.index);
871 return RTE_VHOST_MSG_RESULT_ERR;
876 return RTE_VHOST_MSG_RESULT_OK;
880 * The virtio device sends us the available ring last used index.
883 vhost_user_set_vring_base(struct virtio_net **pdev,
884 struct VhostUserMsg *msg,
885 int main_fd __rte_unused)
887 struct virtio_net *dev = *pdev;
888 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
889 uint64_t val = msg->payload.state.num;
891 if (validate_msg_fds(msg, 0) != 0)
892 return RTE_VHOST_MSG_RESULT_ERR;
894 if (vq_is_packed(dev)) {
896 * Bit[0:14]: avail index
897 * Bit[15]: avail wrap counter
899 vq->last_avail_idx = val & 0x7fff;
900 vq->avail_wrap_counter = !!(val & (0x1 << 15));
902 * Set used index to same value as available one, as
903 * their values should be the same since ring processing
904 * was stopped at get time.
906 vq->last_used_idx = vq->last_avail_idx;
907 vq->used_wrap_counter = vq->avail_wrap_counter;
909 vq->last_used_idx = msg->payload.state.num;
910 vq->last_avail_idx = msg->payload.state.num;
913 return RTE_VHOST_MSG_RESULT_OK;
917 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
918 uint64_t host_phys_addr, uint64_t size)
920 struct guest_page *page, *last_page;
921 struct guest_page *old_pages;
923 if (dev->nr_guest_pages == dev->max_guest_pages) {
924 dev->max_guest_pages *= 2;
925 old_pages = dev->guest_pages;
926 dev->guest_pages = rte_realloc(dev->guest_pages,
927 dev->max_guest_pages * sizeof(*page),
928 RTE_CACHE_LINE_SIZE);
929 if (dev->guest_pages == NULL) {
930 VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
936 if (dev->nr_guest_pages > 0) {
937 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
938 /* merge if the two pages are continuous */
939 if (host_phys_addr == last_page->host_phys_addr +
941 last_page->size += size;
946 page = &dev->guest_pages[dev->nr_guest_pages++];
947 page->guest_phys_addr = guest_phys_addr;
948 page->host_phys_addr = host_phys_addr;
955 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
958 uint64_t reg_size = reg->size;
959 uint64_t host_user_addr = reg->host_user_addr;
960 uint64_t guest_phys_addr = reg->guest_phys_addr;
961 uint64_t host_phys_addr;
964 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
965 size = page_size - (guest_phys_addr & (page_size - 1));
966 size = RTE_MIN(size, reg_size);
968 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
971 host_user_addr += size;
972 guest_phys_addr += size;
975 while (reg_size > 0) {
976 size = RTE_MIN(reg_size, page_size);
977 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
979 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
983 host_user_addr += size;
984 guest_phys_addr += size;
988 /* sort guest page array if over binary search threshold */
989 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
990 qsort((void *)dev->guest_pages, dev->nr_guest_pages,
991 sizeof(struct guest_page), guest_page_addrcmp);
997 #ifdef RTE_LIBRTE_VHOST_DEBUG
998 /* TODO: enable it only in debug mode? */
1000 dump_guest_pages(struct virtio_net *dev)
1003 struct guest_page *page;
1005 for (i = 0; i < dev->nr_guest_pages; i++) {
1006 page = &dev->guest_pages[i];
1008 VHOST_LOG_CONFIG(INFO,
1009 "guest physical page region %u\n"
1010 "\t guest_phys_addr: %" PRIx64 "\n"
1011 "\t host_phys_addr : %" PRIx64 "\n"
1012 "\t size : %" PRIx64 "\n",
1014 page->guest_phys_addr,
1015 page->host_phys_addr,
1020 #define dump_guest_pages(dev)
1024 vhost_memory_changed(struct VhostUserMemory *new,
1025 struct rte_vhost_memory *old)
1029 if (new->nregions != old->nregions)
1032 for (i = 0; i < new->nregions; ++i) {
1033 VhostUserMemoryRegion *new_r = &new->regions[i];
1034 struct rte_vhost_mem_region *old_r = &old->regions[i];
1036 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
1038 if (new_r->memory_size != old_r->size)
1040 if (new_r->userspace_addr != old_r->guest_user_addr)
1048 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
1051 struct virtio_net *dev = *pdev;
1052 struct VhostUserMemory *memory = &msg->payload.memory;
1053 struct rte_vhost_mem_region *reg;
1056 uint64_t mmap_offset;
1062 if (validate_msg_fds(msg, memory->nregions) != 0)
1063 return RTE_VHOST_MSG_RESULT_ERR;
1065 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
1066 VHOST_LOG_CONFIG(ERR,
1067 "too many memory regions (%u)\n", memory->nregions);
1068 return RTE_VHOST_MSG_RESULT_ERR;
1071 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
1072 VHOST_LOG_CONFIG(INFO,
1073 "(%d) memory regions not changed\n", dev->vid);
1077 return RTE_VHOST_MSG_RESULT_OK;
1081 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
1082 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
1084 if (vdpa_dev && vdpa_dev->ops->dev_close)
1085 vdpa_dev->ops->dev_close(dev->vid);
1086 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1088 free_mem_region(dev);
1093 /* Flush IOTLB cache as previous HVAs are now invalid */
1094 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
1095 for (i = 0; i < dev->nr_vring; i++)
1096 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
1098 dev->nr_guest_pages = 0;
1099 if (dev->guest_pages == NULL) {
1100 dev->max_guest_pages = 8;
1101 dev->guest_pages = rte_zmalloc(NULL,
1102 dev->max_guest_pages *
1103 sizeof(struct guest_page),
1104 RTE_CACHE_LINE_SIZE);
1105 if (dev->guest_pages == NULL) {
1106 VHOST_LOG_CONFIG(ERR,
1107 "(%d) failed to allocate memory "
1108 "for dev->guest_pages\n",
1110 return RTE_VHOST_MSG_RESULT_ERR;
1114 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
1115 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
1116 if (dev->mem == NULL) {
1117 VHOST_LOG_CONFIG(ERR,
1118 "(%d) failed to allocate memory for dev->mem\n",
1120 return RTE_VHOST_MSG_RESULT_ERR;
1122 dev->mem->nregions = memory->nregions;
1124 for (i = 0; i < memory->nregions; i++) {
1126 reg = &dev->mem->regions[i];
1128 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1129 reg->guest_user_addr = memory->regions[i].userspace_addr;
1130 reg->size = memory->regions[i].memory_size;
1133 mmap_offset = memory->regions[i].mmap_offset;
1135 /* Check for memory_size + mmap_offset overflow */
1136 if (mmap_offset >= -reg->size) {
1137 VHOST_LOG_CONFIG(ERR,
1138 "mmap_offset (%#"PRIx64") and memory_size "
1139 "(%#"PRIx64") overflow\n",
1140 mmap_offset, reg->size);
1144 mmap_size = reg->size + mmap_offset;
1146 /* mmap() without flag of MAP_ANONYMOUS, should be called
1147 * with length argument aligned with hugepagesz at older
1148 * longterm version Linux, like 2.6.32 and 3.2.72, or
1149 * mmap() will fail with EINVAL.
1151 * to avoid failure, make sure in caller to keep length
1154 alignment = get_blk_size(fd);
1155 if (alignment == (uint64_t)-1) {
1156 VHOST_LOG_CONFIG(ERR,
1157 "couldn't get hugepage size through fstat\n");
1160 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1161 if (mmap_size == 0) {
1163 * It could happen if initial mmap_size + alignment
1164 * overflows the sizeof uint64, which could happen if
1165 * either mmap_size or alignment value is wrong.
1167 * mmap() kernel implementation would return an error,
1168 * but better catch it before and provide useful info
1171 VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
1172 "or alignment (0x%" PRIx64 ") is invalid\n",
1173 reg->size + mmap_offset, alignment);
1177 populate = (dev->dequeue_zero_copy || dev->async_copy) ?
1179 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1180 MAP_SHARED | populate, fd, 0);
1182 if (mmap_addr == MAP_FAILED) {
1183 VHOST_LOG_CONFIG(ERR,
1184 "mmap region %u failed.\n", i);
1188 reg->mmap_addr = mmap_addr;
1189 reg->mmap_size = mmap_size;
1190 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
1193 if (dev->dequeue_zero_copy || dev->async_copy)
1194 if (add_guest_pages(dev, reg, alignment) < 0) {
1195 VHOST_LOG_CONFIG(ERR,
1196 "adding guest pages to region %u failed.\n",
1201 VHOST_LOG_CONFIG(INFO,
1202 "guest memory region %u, size: 0x%" PRIx64 "\n"
1203 "\t guest physical addr: 0x%" PRIx64 "\n"
1204 "\t guest virtual addr: 0x%" PRIx64 "\n"
1205 "\t host virtual addr: 0x%" PRIx64 "\n"
1206 "\t mmap addr : 0x%" PRIx64 "\n"
1207 "\t mmap size : 0x%" PRIx64 "\n"
1208 "\t mmap align: 0x%" PRIx64 "\n"
1209 "\t mmap off : 0x%" PRIx64 "\n",
1211 reg->guest_phys_addr,
1212 reg->guest_user_addr,
1213 reg->host_user_addr,
1214 (uint64_t)(uintptr_t)mmap_addr,
1219 if (dev->postcopy_listening) {
1221 * We haven't a better way right now than sharing
1222 * DPDK's virtual address with Qemu, so that Qemu can
1223 * retrieve the region offset when handling userfaults.
1225 memory->regions[i].userspace_addr =
1226 reg->host_user_addr;
1229 if (dev->postcopy_listening) {
1230 /* Send the addresses back to qemu */
1232 send_vhost_reply(main_fd, msg);
1234 /* Wait for qemu to acknolwedge it's got the addresses
1235 * we've got to wait before we're allowed to generate faults.
1237 VhostUserMsg ack_msg;
1238 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1239 VHOST_LOG_CONFIG(ERR,
1240 "Failed to read qemu ack on postcopy set-mem-table\n");
1244 if (validate_msg_fds(&ack_msg, 0) != 0)
1247 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1248 VHOST_LOG_CONFIG(ERR,
1249 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1250 ack_msg.request.master);
1254 /* Now userfault register and we can use the memory */
1255 for (i = 0; i < memory->nregions; i++) {
1256 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1257 reg = &dev->mem->regions[i];
1258 struct uffdio_register reg_struct;
1261 * Let's register all the mmap'ed area to ensure
1262 * alignment on page boundary.
1264 reg_struct.range.start =
1265 (uint64_t)(uintptr_t)reg->mmap_addr;
1266 reg_struct.range.len = reg->mmap_size;
1267 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1269 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1271 VHOST_LOG_CONFIG(ERR,
1272 "Failed to register ufd for region %d: (ufd = %d) %s\n",
1273 i, dev->postcopy_ufd,
1277 VHOST_LOG_CONFIG(INFO,
1278 "\t userfaultfd registered for range : "
1279 "%" PRIx64 " - %" PRIx64 "\n",
1280 (uint64_t)reg_struct.range.start,
1281 (uint64_t)reg_struct.range.start +
1282 (uint64_t)reg_struct.range.len - 1);
1289 for (i = 0; i < dev->nr_vring; i++) {
1290 struct vhost_virtqueue *vq = dev->virtqueue[i];
1292 if (vq->desc || vq->avail || vq->used) {
1294 * If the memory table got updated, the ring addresses
1295 * need to be translated again as virtual addresses have
1298 vring_invalidate(dev, vq);
1300 dev = translate_ring_addresses(dev, i);
1310 dump_guest_pages(dev);
1312 return RTE_VHOST_MSG_RESULT_OK;
1315 free_mem_region(dev);
1318 return RTE_VHOST_MSG_RESULT_ERR;
1322 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1329 if (vq_is_packed(dev))
1330 rings_ok = vq->desc_packed && vq->driver_event &&
1333 rings_ok = vq->desc && vq->avail && vq->used;
1336 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1337 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1341 #define VIRTIO_DEV_NUM_VQS_TO_BE_READY 2u
1344 virtio_is_ready(struct virtio_net *dev)
1346 struct vhost_virtqueue *vq;
1349 if (dev->flags & VIRTIO_DEV_READY)
1352 if (dev->nr_vring < VIRTIO_DEV_NUM_VQS_TO_BE_READY)
1355 for (i = 0; i < VIRTIO_DEV_NUM_VQS_TO_BE_READY; i++) {
1356 vq = dev->virtqueue[i];
1358 if (!vq_is_ready(dev, vq))
1362 /* If supported, ensure the frontend is really done with config */
1363 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
1364 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
1367 dev->flags |= VIRTIO_DEV_READY;
1369 if (!(dev->flags & VIRTIO_DEV_RUNNING))
1370 VHOST_LOG_CONFIG(INFO,
1371 "virtio is now ready for processing.\n");
1376 inflight_mem_alloc(const char *name, size_t size, int *fd)
1380 char fname[20] = "/tmp/memfd-XXXXXX";
1383 #ifdef MEMFD_SUPPORTED
1384 mfd = memfd_create(name, MFD_CLOEXEC);
1389 mfd = mkstemp(fname);
1391 VHOST_LOG_CONFIG(ERR,
1392 "failed to get inflight buffer fd\n");
1399 if (ftruncate(mfd, size) == -1) {
1400 VHOST_LOG_CONFIG(ERR,
1401 "failed to alloc inflight buffer\n");
1406 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
1407 if (ptr == MAP_FAILED) {
1408 VHOST_LOG_CONFIG(ERR,
1409 "failed to mmap inflight buffer\n");
1419 get_pervq_shm_size_split(uint16_t queue_size)
1421 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
1422 queue_size + sizeof(uint64_t) +
1423 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
1427 get_pervq_shm_size_packed(uint16_t queue_size)
1429 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
1430 * queue_size + sizeof(uint64_t) +
1431 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
1432 INFLIGHT_ALIGNMENT);
1436 vhost_user_get_inflight_fd(struct virtio_net **pdev,
1438 int main_fd __rte_unused)
1440 struct rte_vhost_inflight_info_packed *inflight_packed;
1441 uint64_t pervq_inflight_size, mmap_size;
1442 uint16_t num_queues, queue_size;
1443 struct virtio_net *dev = *pdev;
1447 if (msg->size != sizeof(msg->payload.inflight)) {
1448 VHOST_LOG_CONFIG(ERR,
1449 "invalid get_inflight_fd message size is %d\n",
1451 return RTE_VHOST_MSG_RESULT_ERR;
1454 if (dev->inflight_info == NULL) {
1455 dev->inflight_info = calloc(1,
1456 sizeof(struct inflight_mem_info));
1457 if (!dev->inflight_info) {
1458 VHOST_LOG_CONFIG(ERR,
1459 "failed to alloc dev inflight area\n");
1460 return RTE_VHOST_MSG_RESULT_ERR;
1462 dev->inflight_info->fd = -1;
1465 num_queues = msg->payload.inflight.num_queues;
1466 queue_size = msg->payload.inflight.queue_size;
1468 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
1469 msg->payload.inflight.num_queues);
1470 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
1471 msg->payload.inflight.queue_size);
1473 if (vq_is_packed(dev))
1474 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1476 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1478 mmap_size = num_queues * pervq_inflight_size;
1479 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
1481 VHOST_LOG_CONFIG(ERR,
1482 "failed to alloc vhost inflight area\n");
1483 msg->payload.inflight.mmap_size = 0;
1484 return RTE_VHOST_MSG_RESULT_ERR;
1486 memset(addr, 0, mmap_size);
1488 if (dev->inflight_info->addr) {
1489 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1490 dev->inflight_info->addr = NULL;
1493 if (dev->inflight_info->fd >= 0) {
1494 close(dev->inflight_info->fd);
1495 dev->inflight_info->fd = -1;
1498 dev->inflight_info->addr = addr;
1499 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
1500 dev->inflight_info->fd = msg->fds[0] = fd;
1501 msg->payload.inflight.mmap_offset = 0;
1504 if (vq_is_packed(dev)) {
1505 for (i = 0; i < num_queues; i++) {
1507 (struct rte_vhost_inflight_info_packed *)addr;
1508 inflight_packed->used_wrap_counter = 1;
1509 inflight_packed->old_used_wrap_counter = 1;
1510 for (j = 0; j < queue_size; j++)
1511 inflight_packed->desc[j].next = j + 1;
1512 addr = (void *)((char *)addr + pervq_inflight_size);
1516 VHOST_LOG_CONFIG(INFO,
1517 "send inflight mmap_size: %"PRIu64"\n",
1518 msg->payload.inflight.mmap_size);
1519 VHOST_LOG_CONFIG(INFO,
1520 "send inflight mmap_offset: %"PRIu64"\n",
1521 msg->payload.inflight.mmap_offset);
1522 VHOST_LOG_CONFIG(INFO,
1523 "send inflight fd: %d\n", msg->fds[0]);
1525 return RTE_VHOST_MSG_RESULT_REPLY;
1529 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
1530 int main_fd __rte_unused)
1532 uint64_t mmap_size, mmap_offset;
1533 uint16_t num_queues, queue_size;
1534 struct virtio_net *dev = *pdev;
1535 uint32_t pervq_inflight_size;
1536 struct vhost_virtqueue *vq;
1541 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
1542 VHOST_LOG_CONFIG(ERR,
1543 "invalid set_inflight_fd message size is %d,fd is %d\n",
1545 return RTE_VHOST_MSG_RESULT_ERR;
1548 mmap_size = msg->payload.inflight.mmap_size;
1549 mmap_offset = msg->payload.inflight.mmap_offset;
1550 num_queues = msg->payload.inflight.num_queues;
1551 queue_size = msg->payload.inflight.queue_size;
1553 if (vq_is_packed(dev))
1554 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1556 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1558 VHOST_LOG_CONFIG(INFO,
1559 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
1560 VHOST_LOG_CONFIG(INFO,
1561 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
1562 VHOST_LOG_CONFIG(INFO,
1563 "set_inflight_fd num_queues: %u\n", num_queues);
1564 VHOST_LOG_CONFIG(INFO,
1565 "set_inflight_fd queue_size: %u\n", queue_size);
1566 VHOST_LOG_CONFIG(INFO,
1567 "set_inflight_fd fd: %d\n", fd);
1568 VHOST_LOG_CONFIG(INFO,
1569 "set_inflight_fd pervq_inflight_size: %d\n",
1570 pervq_inflight_size);
1572 if (!dev->inflight_info) {
1573 dev->inflight_info = calloc(1,
1574 sizeof(struct inflight_mem_info));
1575 if (dev->inflight_info == NULL) {
1576 VHOST_LOG_CONFIG(ERR,
1577 "failed to alloc dev inflight area\n");
1578 return RTE_VHOST_MSG_RESULT_ERR;
1580 dev->inflight_info->fd = -1;
1583 if (dev->inflight_info->addr) {
1584 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1585 dev->inflight_info->addr = NULL;
1588 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
1590 if (addr == MAP_FAILED) {
1591 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
1592 return RTE_VHOST_MSG_RESULT_ERR;
1595 if (dev->inflight_info->fd >= 0) {
1596 close(dev->inflight_info->fd);
1597 dev->inflight_info->fd = -1;
1600 dev->inflight_info->fd = fd;
1601 dev->inflight_info->addr = addr;
1602 dev->inflight_info->size = mmap_size;
1604 for (i = 0; i < num_queues; i++) {
1605 vq = dev->virtqueue[i];
1606 if (vq_is_packed(dev)) {
1607 vq->inflight_packed = addr;
1608 vq->inflight_packed->desc_num = queue_size;
1610 vq->inflight_split = addr;
1611 vq->inflight_split->desc_num = queue_size;
1613 addr = (void *)((char *)addr + pervq_inflight_size);
1616 return RTE_VHOST_MSG_RESULT_OK;
1620 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1621 int main_fd __rte_unused)
1623 struct virtio_net *dev = *pdev;
1624 struct vhost_vring_file file;
1625 struct vhost_virtqueue *vq;
1628 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1629 if (validate_msg_fds(msg, expected_fds) != 0)
1630 return RTE_VHOST_MSG_RESULT_ERR;
1632 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1633 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1634 file.fd = VIRTIO_INVALID_EVENTFD;
1636 file.fd = msg->fds[0];
1637 VHOST_LOG_CONFIG(INFO,
1638 "vring call idx:%d file:%d\n", file.index, file.fd);
1640 vq = dev->virtqueue[file.index];
1643 vhost_user_notify_queue_state(dev, file.index, 0);
1647 if (vq->callfd >= 0)
1650 vq->callfd = file.fd;
1652 return RTE_VHOST_MSG_RESULT_OK;
1655 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1656 struct VhostUserMsg *msg,
1657 int main_fd __rte_unused)
1661 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1662 if (validate_msg_fds(msg, expected_fds) != 0)
1663 return RTE_VHOST_MSG_RESULT_ERR;
1665 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1667 VHOST_LOG_CONFIG(INFO, "not implemented\n");
1669 return RTE_VHOST_MSG_RESULT_OK;
1673 resubmit_desc_compare(const void *a, const void *b)
1675 const struct rte_vhost_resubmit_desc *desc0 = a;
1676 const struct rte_vhost_resubmit_desc *desc1 = b;
1678 if (desc1->counter > desc0->counter)
1685 vhost_check_queue_inflights_split(struct virtio_net *dev,
1686 struct vhost_virtqueue *vq)
1689 uint16_t resubmit_num = 0, last_io, num;
1690 struct vring_used *used = vq->used;
1691 struct rte_vhost_resubmit_info *resubmit;
1692 struct rte_vhost_inflight_info_split *inflight_split;
1694 if (!(dev->protocol_features &
1695 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1696 return RTE_VHOST_MSG_RESULT_OK;
1698 /* The frontend may still not support the inflight feature
1699 * although we negotiate the protocol feature.
1701 if ((!vq->inflight_split))
1702 return RTE_VHOST_MSG_RESULT_OK;
1704 if (!vq->inflight_split->version) {
1705 vq->inflight_split->version = INFLIGHT_VERSION;
1706 return RTE_VHOST_MSG_RESULT_OK;
1709 if (vq->resubmit_inflight)
1710 return RTE_VHOST_MSG_RESULT_OK;
1712 inflight_split = vq->inflight_split;
1713 vq->global_counter = 0;
1714 last_io = inflight_split->last_inflight_io;
1716 if (inflight_split->used_idx != used->idx) {
1717 inflight_split->desc[last_io].inflight = 0;
1719 inflight_split->used_idx = used->idx;
1722 for (i = 0; i < inflight_split->desc_num; i++) {
1723 if (inflight_split->desc[i].inflight == 1)
1727 vq->last_avail_idx += resubmit_num;
1730 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1732 VHOST_LOG_CONFIG(ERR,
1733 "failed to allocate memory for resubmit info.\n");
1734 return RTE_VHOST_MSG_RESULT_ERR;
1737 resubmit->resubmit_list = calloc(resubmit_num,
1738 sizeof(struct rte_vhost_resubmit_desc));
1739 if (!resubmit->resubmit_list) {
1740 VHOST_LOG_CONFIG(ERR,
1741 "failed to allocate memory for inflight desc.\n");
1743 return RTE_VHOST_MSG_RESULT_ERR;
1747 for (i = 0; i < vq->inflight_split->desc_num; i++) {
1748 if (vq->inflight_split->desc[i].inflight == 1) {
1749 resubmit->resubmit_list[num].index = i;
1750 resubmit->resubmit_list[num].counter =
1751 inflight_split->desc[i].counter;
1755 resubmit->resubmit_num = num;
1757 if (resubmit->resubmit_num > 1)
1758 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1759 sizeof(struct rte_vhost_resubmit_desc),
1760 resubmit_desc_compare);
1762 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1763 vq->resubmit_inflight = resubmit;
1766 return RTE_VHOST_MSG_RESULT_OK;
1770 vhost_check_queue_inflights_packed(struct virtio_net *dev,
1771 struct vhost_virtqueue *vq)
1774 uint16_t resubmit_num = 0, old_used_idx, num;
1775 struct rte_vhost_resubmit_info *resubmit;
1776 struct rte_vhost_inflight_info_packed *inflight_packed;
1778 if (!(dev->protocol_features &
1779 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1780 return RTE_VHOST_MSG_RESULT_OK;
1782 /* The frontend may still not support the inflight feature
1783 * although we negotiate the protocol feature.
1785 if ((!vq->inflight_packed))
1786 return RTE_VHOST_MSG_RESULT_OK;
1788 if (!vq->inflight_packed->version) {
1789 vq->inflight_packed->version = INFLIGHT_VERSION;
1790 return RTE_VHOST_MSG_RESULT_OK;
1793 if (vq->resubmit_inflight)
1794 return RTE_VHOST_MSG_RESULT_OK;
1796 inflight_packed = vq->inflight_packed;
1797 vq->global_counter = 0;
1798 old_used_idx = inflight_packed->old_used_idx;
1800 if (inflight_packed->used_idx != old_used_idx) {
1801 if (inflight_packed->desc[old_used_idx].inflight == 0) {
1802 inflight_packed->old_used_idx =
1803 inflight_packed->used_idx;
1804 inflight_packed->old_used_wrap_counter =
1805 inflight_packed->used_wrap_counter;
1806 inflight_packed->old_free_head =
1807 inflight_packed->free_head;
1809 inflight_packed->used_idx =
1810 inflight_packed->old_used_idx;
1811 inflight_packed->used_wrap_counter =
1812 inflight_packed->old_used_wrap_counter;
1813 inflight_packed->free_head =
1814 inflight_packed->old_free_head;
1818 for (i = 0; i < inflight_packed->desc_num; i++) {
1819 if (inflight_packed->desc[i].inflight == 1)
1824 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1825 if (resubmit == NULL) {
1826 VHOST_LOG_CONFIG(ERR,
1827 "failed to allocate memory for resubmit info.\n");
1828 return RTE_VHOST_MSG_RESULT_ERR;
1831 resubmit->resubmit_list = calloc(resubmit_num,
1832 sizeof(struct rte_vhost_resubmit_desc));
1833 if (resubmit->resubmit_list == NULL) {
1834 VHOST_LOG_CONFIG(ERR,
1835 "failed to allocate memory for resubmit desc.\n");
1837 return RTE_VHOST_MSG_RESULT_ERR;
1841 for (i = 0; i < inflight_packed->desc_num; i++) {
1842 if (vq->inflight_packed->desc[i].inflight == 1) {
1843 resubmit->resubmit_list[num].index = i;
1844 resubmit->resubmit_list[num].counter =
1845 inflight_packed->desc[i].counter;
1849 resubmit->resubmit_num = num;
1851 if (resubmit->resubmit_num > 1)
1852 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1853 sizeof(struct rte_vhost_resubmit_desc),
1854 resubmit_desc_compare);
1856 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1857 vq->resubmit_inflight = resubmit;
1860 return RTE_VHOST_MSG_RESULT_OK;
1864 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1865 int main_fd __rte_unused)
1867 struct virtio_net *dev = *pdev;
1868 struct vhost_vring_file file;
1869 struct vhost_virtqueue *vq;
1872 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1873 if (validate_msg_fds(msg, expected_fds) != 0)
1874 return RTE_VHOST_MSG_RESULT_ERR;
1876 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1877 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1878 file.fd = VIRTIO_INVALID_EVENTFD;
1880 file.fd = msg->fds[0];
1881 VHOST_LOG_CONFIG(INFO,
1882 "vring kick idx:%d file:%d\n", file.index, file.fd);
1884 /* Interpret ring addresses only when ring is started. */
1885 dev = translate_ring_addresses(dev, file.index);
1887 return RTE_VHOST_MSG_RESULT_ERR;
1891 vq = dev->virtqueue[file.index];
1894 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1895 * the ring starts already enabled. Otherwise, it is enabled via
1896 * the SET_VRING_ENABLE message.
1898 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1900 if (dev->notify_ops->vring_state_changed)
1901 dev->notify_ops->vring_state_changed(
1902 dev->vid, file.index, 1);
1906 vhost_user_notify_queue_state(dev, file.index, 0);
1910 if (vq->kickfd >= 0)
1912 vq->kickfd = file.fd;
1914 if (vq_is_packed(dev)) {
1915 if (vhost_check_queue_inflights_packed(dev, vq)) {
1916 VHOST_LOG_CONFIG(ERR,
1917 "failed to inflights for vq: %d\n", file.index);
1918 return RTE_VHOST_MSG_RESULT_ERR;
1921 if (vhost_check_queue_inflights_split(dev, vq)) {
1922 VHOST_LOG_CONFIG(ERR,
1923 "failed to inflights for vq: %d\n", file.index);
1924 return RTE_VHOST_MSG_RESULT_ERR;
1928 return RTE_VHOST_MSG_RESULT_OK;
1932 free_zmbufs(struct vhost_virtqueue *vq)
1934 drain_zmbuf_list(vq);
1936 rte_free(vq->zmbufs);
1940 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1943 vhost_user_get_vring_base(struct virtio_net **pdev,
1944 struct VhostUserMsg *msg,
1945 int main_fd __rte_unused)
1947 struct virtio_net *dev = *pdev;
1948 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1951 if (validate_msg_fds(msg, 0) != 0)
1952 return RTE_VHOST_MSG_RESULT_ERR;
1954 /* We have to stop the queue (virtio) if it is running. */
1955 vhost_destroy_device_notify(dev);
1957 dev->flags &= ~VIRTIO_DEV_READY;
1958 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1960 /* Here we are safe to get the indexes */
1961 if (vq_is_packed(dev)) {
1963 * Bit[0:14]: avail index
1964 * Bit[15]: avail wrap counter
1966 val = vq->last_avail_idx & 0x7fff;
1967 val |= vq->avail_wrap_counter << 15;
1968 msg->payload.state.num = val;
1970 msg->payload.state.num = vq->last_avail_idx;
1973 VHOST_LOG_CONFIG(INFO,
1974 "vring base idx:%d file:%d\n", msg->payload.state.index,
1975 msg->payload.state.num);
1977 * Based on current qemu vhost-user implementation, this message is
1978 * sent and only sent in vhost_vring_stop.
1979 * TODO: cleanup the vring, it isn't usable since here.
1981 if (vq->kickfd >= 0)
1984 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
1986 if (vq->callfd >= 0)
1989 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
1991 vq->signalled_used_valid = false;
1993 if (dev->dequeue_zero_copy)
1995 if (vq_is_packed(dev)) {
1996 rte_free(vq->shadow_used_packed);
1997 vq->shadow_used_packed = NULL;
1999 rte_free(vq->shadow_used_split);
2000 vq->shadow_used_split = NULL;
2001 if (vq->async_pkts_pending)
2002 rte_free(vq->async_pkts_pending);
2003 if (vq->async_pending_info)
2004 rte_free(vq->async_pending_info);
2005 vq->async_pkts_pending = NULL;
2006 vq->async_pending_info = NULL;
2009 rte_free(vq->batch_copy_elems);
2010 vq->batch_copy_elems = NULL;
2012 msg->size = sizeof(msg->payload.state);
2015 vring_invalidate(dev, vq);
2017 return RTE_VHOST_MSG_RESULT_REPLY;
2021 * when virtio queues are ready to work, qemu will send us to
2022 * enable the virtio queue pair.
2025 vhost_user_set_vring_enable(struct virtio_net **pdev,
2026 struct VhostUserMsg *msg,
2027 int main_fd __rte_unused)
2029 struct virtio_net *dev = *pdev;
2030 int enable = (int)msg->payload.state.num;
2031 int index = (int)msg->payload.state.index;
2033 if (validate_msg_fds(msg, 0) != 0)
2034 return RTE_VHOST_MSG_RESULT_ERR;
2036 VHOST_LOG_CONFIG(INFO,
2037 "set queue enable: %d to qp idx: %d\n",
2040 if (!enable && dev->virtqueue[index]->async_registered) {
2041 if (dev->virtqueue[index]->async_pkts_inflight_n) {
2042 VHOST_LOG_CONFIG(ERR, "failed to disable vring. "
2043 "async inflight packets must be completed first\n");
2044 return RTE_VHOST_MSG_RESULT_ERR;
2048 /* On disable, rings have to be stopped being processed. */
2049 if (!enable && dev->dequeue_zero_copy)
2050 drain_zmbuf_list(dev->virtqueue[index]);
2052 dev->virtqueue[index]->enabled = enable;
2054 return RTE_VHOST_MSG_RESULT_OK;
2058 vhost_user_get_protocol_features(struct virtio_net **pdev,
2059 struct VhostUserMsg *msg,
2060 int main_fd __rte_unused)
2062 struct virtio_net *dev = *pdev;
2063 uint64_t features, protocol_features;
2065 if (validate_msg_fds(msg, 0) != 0)
2066 return RTE_VHOST_MSG_RESULT_ERR;
2068 rte_vhost_driver_get_features(dev->ifname, &features);
2069 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
2071 msg->payload.u64 = protocol_features;
2072 msg->size = sizeof(msg->payload.u64);
2075 return RTE_VHOST_MSG_RESULT_REPLY;
2079 vhost_user_set_protocol_features(struct virtio_net **pdev,
2080 struct VhostUserMsg *msg,
2081 int main_fd __rte_unused)
2083 struct virtio_net *dev = *pdev;
2084 uint64_t protocol_features = msg->payload.u64;
2085 uint64_t slave_protocol_features = 0;
2087 if (validate_msg_fds(msg, 0) != 0)
2088 return RTE_VHOST_MSG_RESULT_ERR;
2090 rte_vhost_driver_get_protocol_features(dev->ifname,
2091 &slave_protocol_features);
2092 if (protocol_features & ~slave_protocol_features) {
2093 VHOST_LOG_CONFIG(ERR,
2094 "(%d) received invalid protocol features.\n",
2096 return RTE_VHOST_MSG_RESULT_ERR;
2099 dev->protocol_features = protocol_features;
2100 VHOST_LOG_CONFIG(INFO,
2101 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
2102 dev->protocol_features);
2104 return RTE_VHOST_MSG_RESULT_OK;
2108 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
2109 int main_fd __rte_unused)
2111 struct virtio_net *dev = *pdev;
2112 int fd = msg->fds[0];
2116 if (validate_msg_fds(msg, 1) != 0)
2117 return RTE_VHOST_MSG_RESULT_ERR;
2120 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
2121 return RTE_VHOST_MSG_RESULT_ERR;
2124 if (msg->size != sizeof(VhostUserLog)) {
2125 VHOST_LOG_CONFIG(ERR,
2126 "invalid log base msg size: %"PRId32" != %d\n",
2127 msg->size, (int)sizeof(VhostUserLog));
2128 return RTE_VHOST_MSG_RESULT_ERR;
2131 size = msg->payload.log.mmap_size;
2132 off = msg->payload.log.mmap_offset;
2134 /* Check for mmap size and offset overflow. */
2136 VHOST_LOG_CONFIG(ERR,
2137 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
2139 return RTE_VHOST_MSG_RESULT_ERR;
2142 VHOST_LOG_CONFIG(INFO,
2143 "log mmap size: %"PRId64", offset: %"PRId64"\n",
2147 * mmap from 0 to workaround a hugepage mmap bug: mmap will
2148 * fail when offset is not page size aligned.
2150 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2152 if (addr == MAP_FAILED) {
2153 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
2154 return RTE_VHOST_MSG_RESULT_ERR;
2158 * Free previously mapped log memory on occasionally
2159 * multiple VHOST_USER_SET_LOG_BASE.
2161 if (dev->log_addr) {
2162 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
2164 dev->log_addr = (uint64_t)(uintptr_t)addr;
2165 dev->log_base = dev->log_addr + off;
2166 dev->log_size = size;
2169 * The spec is not clear about it (yet), but QEMU doesn't expect
2170 * any payload in the reply.
2175 return RTE_VHOST_MSG_RESULT_REPLY;
2178 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
2179 struct VhostUserMsg *msg,
2180 int main_fd __rte_unused)
2182 if (validate_msg_fds(msg, 1) != 0)
2183 return RTE_VHOST_MSG_RESULT_ERR;
2186 VHOST_LOG_CONFIG(INFO, "not implemented.\n");
2188 return RTE_VHOST_MSG_RESULT_OK;
2192 * An rarp packet is constructed and broadcasted to notify switches about
2193 * the new location of the migrated VM, so that packets from outside will
2194 * not be lost after migration.
2196 * However, we don't actually "send" a rarp packet here, instead, we set
2197 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
2200 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
2201 int main_fd __rte_unused)
2203 struct virtio_net *dev = *pdev;
2204 uint8_t *mac = (uint8_t *)&msg->payload.u64;
2205 struct rte_vdpa_device *vdpa_dev;
2207 if (validate_msg_fds(msg, 0) != 0)
2208 return RTE_VHOST_MSG_RESULT_ERR;
2210 VHOST_LOG_CONFIG(DEBUG,
2211 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
2212 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2213 memcpy(dev->mac.addr_bytes, mac, 6);
2216 * Set the flag to inject a RARP broadcast packet at
2217 * rte_vhost_dequeue_burst().
2219 * __ATOMIC_RELEASE ordering is for making sure the mac is
2220 * copied before the flag is set.
2222 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
2223 vdpa_dev = dev->vdpa_dev;
2224 if (vdpa_dev && vdpa_dev->ops->migration_done)
2225 vdpa_dev->ops->migration_done(dev->vid);
2227 return RTE_VHOST_MSG_RESULT_OK;
2231 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
2232 int main_fd __rte_unused)
2234 struct virtio_net *dev = *pdev;
2236 if (validate_msg_fds(msg, 0) != 0)
2237 return RTE_VHOST_MSG_RESULT_ERR;
2239 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
2240 msg->payload.u64 > VIRTIO_MAX_MTU) {
2241 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
2244 return RTE_VHOST_MSG_RESULT_ERR;
2247 dev->mtu = msg->payload.u64;
2249 return RTE_VHOST_MSG_RESULT_OK;
2253 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
2254 int main_fd __rte_unused)
2256 struct virtio_net *dev = *pdev;
2257 int fd = msg->fds[0];
2259 if (validate_msg_fds(msg, 1) != 0)
2260 return RTE_VHOST_MSG_RESULT_ERR;
2263 VHOST_LOG_CONFIG(ERR,
2264 "Invalid file descriptor for slave channel (%d)\n",
2266 return RTE_VHOST_MSG_RESULT_ERR;
2269 if (dev->slave_req_fd >= 0)
2270 close(dev->slave_req_fd);
2272 dev->slave_req_fd = fd;
2274 return RTE_VHOST_MSG_RESULT_OK;
2278 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2280 struct vhost_vring_addr *ra;
2281 uint64_t start, end, len;
2284 end = start + imsg->size;
2286 ra = &vq->ring_addrs;
2287 len = sizeof(struct vring_desc) * vq->size;
2288 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2291 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
2292 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2295 len = sizeof(struct vring_used) +
2296 sizeof(struct vring_used_elem) * vq->size;
2297 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2300 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2301 len = sizeof(uint64_t);
2302 if (ra->log_guest_addr < end &&
2303 (ra->log_guest_addr + len) > start)
2311 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2313 struct vhost_vring_addr *ra;
2314 uint64_t start, end, len;
2317 end = start + imsg->size;
2319 ra = &vq->ring_addrs;
2320 len = sizeof(struct vring_packed_desc) * vq->size;
2321 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2324 len = sizeof(struct vring_packed_desc_event);
2325 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2328 len = sizeof(struct vring_packed_desc_event);
2329 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2332 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2333 len = sizeof(uint64_t);
2334 if (ra->log_guest_addr < end &&
2335 (ra->log_guest_addr + len) > start)
2342 static int is_vring_iotlb(struct virtio_net *dev,
2343 struct vhost_virtqueue *vq,
2344 struct vhost_iotlb_msg *imsg)
2346 if (vq_is_packed(dev))
2347 return is_vring_iotlb_packed(vq, imsg);
2349 return is_vring_iotlb_split(vq, imsg);
2353 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
2354 int main_fd __rte_unused)
2356 struct virtio_net *dev = *pdev;
2357 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
2361 if (validate_msg_fds(msg, 0) != 0)
2362 return RTE_VHOST_MSG_RESULT_ERR;
2364 switch (imsg->type) {
2365 case VHOST_IOTLB_UPDATE:
2367 vva = qva_to_vva(dev, imsg->uaddr, &len);
2369 return RTE_VHOST_MSG_RESULT_ERR;
2371 for (i = 0; i < dev->nr_vring; i++) {
2372 struct vhost_virtqueue *vq = dev->virtqueue[i];
2374 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
2377 if (is_vring_iotlb(dev, vq, imsg))
2378 *pdev = dev = translate_ring_addresses(dev, i);
2381 case VHOST_IOTLB_INVALIDATE:
2382 for (i = 0; i < dev->nr_vring; i++) {
2383 struct vhost_virtqueue *vq = dev->virtqueue[i];
2385 vhost_user_iotlb_cache_remove(vq, imsg->iova,
2388 if (is_vring_iotlb(dev, vq, imsg))
2389 vring_invalidate(dev, vq);
2393 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
2395 return RTE_VHOST_MSG_RESULT_ERR;
2398 return RTE_VHOST_MSG_RESULT_OK;
2402 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
2403 struct VhostUserMsg *msg,
2404 int main_fd __rte_unused)
2406 struct virtio_net *dev = *pdev;
2407 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
2408 struct uffdio_api api_struct;
2410 if (validate_msg_fds(msg, 0) != 0)
2411 return RTE_VHOST_MSG_RESULT_ERR;
2413 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
2415 if (dev->postcopy_ufd == -1) {
2416 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
2418 return RTE_VHOST_MSG_RESULT_ERR;
2420 api_struct.api = UFFD_API;
2421 api_struct.features = 0;
2422 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
2423 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
2425 close(dev->postcopy_ufd);
2426 dev->postcopy_ufd = -1;
2427 return RTE_VHOST_MSG_RESULT_ERR;
2429 msg->fds[0] = dev->postcopy_ufd;
2432 return RTE_VHOST_MSG_RESULT_REPLY;
2434 dev->postcopy_ufd = -1;
2437 return RTE_VHOST_MSG_RESULT_ERR;
2442 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
2443 struct VhostUserMsg *msg __rte_unused,
2444 int main_fd __rte_unused)
2446 struct virtio_net *dev = *pdev;
2448 if (validate_msg_fds(msg, 0) != 0)
2449 return RTE_VHOST_MSG_RESULT_ERR;
2451 if (dev->mem && dev->mem->nregions) {
2452 VHOST_LOG_CONFIG(ERR,
2453 "Regions already registered at postcopy-listen\n");
2454 return RTE_VHOST_MSG_RESULT_ERR;
2456 dev->postcopy_listening = 1;
2458 return RTE_VHOST_MSG_RESULT_OK;
2462 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
2463 int main_fd __rte_unused)
2465 struct virtio_net *dev = *pdev;
2467 if (validate_msg_fds(msg, 0) != 0)
2468 return RTE_VHOST_MSG_RESULT_ERR;
2470 dev->postcopy_listening = 0;
2471 if (dev->postcopy_ufd >= 0) {
2472 close(dev->postcopy_ufd);
2473 dev->postcopy_ufd = -1;
2476 msg->payload.u64 = 0;
2477 msg->size = sizeof(msg->payload.u64);
2480 return RTE_VHOST_MSG_RESULT_REPLY;
2484 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2485 int main_fd __rte_unused)
2487 struct virtio_net *dev = *pdev;
2489 if (validate_msg_fds(msg, 0) != 0)
2490 return RTE_VHOST_MSG_RESULT_ERR;
2492 msg->payload.u64 = dev->status;
2493 msg->size = sizeof(msg->payload.u64);
2496 return RTE_VHOST_MSG_RESULT_REPLY;
2500 vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2501 int main_fd __rte_unused)
2503 struct virtio_net *dev = *pdev;
2505 if (validate_msg_fds(msg, 0) != 0)
2506 return RTE_VHOST_MSG_RESULT_ERR;
2508 /* As per Virtio specification, the device status is 8bits long */
2509 if (msg->payload.u64 > UINT8_MAX) {
2510 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
2512 return RTE_VHOST_MSG_RESULT_ERR;
2515 dev->status = msg->payload.u64;
2517 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
2518 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
2519 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
2521 * Clear the bit to let the driver know about the feature
2522 * negotiation failure
2524 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
2527 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
2528 "\t-ACKNOWLEDGE: %u\n"
2530 "\t-FEATURES_OK: %u\n"
2531 "\t-DRIVER_OK: %u\n"
2532 "\t-DEVICE_NEED_RESET: %u\n"
2535 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
2536 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
2537 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
2538 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
2539 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
2540 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
2542 return RTE_VHOST_MSG_RESULT_OK;
2545 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
2546 struct VhostUserMsg *msg,
2548 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
2549 [VHOST_USER_NONE] = NULL,
2550 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
2551 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
2552 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
2553 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
2554 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
2555 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
2556 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
2557 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
2558 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
2559 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
2560 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
2561 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
2562 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
2563 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
2564 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
2565 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
2566 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
2567 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
2568 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
2569 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
2570 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
2571 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
2572 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
2573 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
2574 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
2575 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
2576 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
2577 [VHOST_USER_SET_STATUS] = vhost_user_set_status,
2578 [VHOST_USER_GET_STATUS] = vhost_user_get_status,
2581 /* return bytes# of read on success or negative val on failure. */
2583 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
2587 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
2588 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
2591 } else if (ret != VHOST_USER_HDR_SIZE) {
2592 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
2598 if (msg->size > sizeof(msg->payload)) {
2599 VHOST_LOG_CONFIG(ERR,
2600 "invalid msg size: %d\n", msg->size);
2603 ret = read(sockfd, &msg->payload, msg->size);
2606 if (ret != (int)msg->size) {
2607 VHOST_LOG_CONFIG(ERR,
2608 "read control message failed\n");
2617 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
2622 return send_fd_message(sockfd, (char *)msg,
2623 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
2627 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
2632 msg->flags &= ~VHOST_USER_VERSION_MASK;
2633 msg->flags &= ~VHOST_USER_NEED_REPLY;
2634 msg->flags |= VHOST_USER_VERSION;
2635 msg->flags |= VHOST_USER_REPLY_MASK;
2637 return send_vhost_message(sockfd, msg);
2641 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
2645 if (msg->flags & VHOST_USER_NEED_REPLY)
2646 rte_spinlock_lock(&dev->slave_req_lock);
2648 ret = send_vhost_message(dev->slave_req_fd, msg);
2649 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
2650 rte_spinlock_unlock(&dev->slave_req_lock);
2656 * Allocate a queue pair if it hasn't been allocated yet
2659 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
2660 struct VhostUserMsg *msg)
2664 switch (msg->request.master) {
2665 case VHOST_USER_SET_VRING_KICK:
2666 case VHOST_USER_SET_VRING_CALL:
2667 case VHOST_USER_SET_VRING_ERR:
2668 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
2670 case VHOST_USER_SET_VRING_NUM:
2671 case VHOST_USER_SET_VRING_BASE:
2672 case VHOST_USER_SET_VRING_ENABLE:
2673 vring_idx = msg->payload.state.index;
2675 case VHOST_USER_SET_VRING_ADDR:
2676 vring_idx = msg->payload.addr.index;
2682 if (vring_idx >= VHOST_MAX_VRING) {
2683 VHOST_LOG_CONFIG(ERR,
2684 "invalid vring index: %u\n", vring_idx);
2688 if (dev->virtqueue[vring_idx])
2691 return alloc_vring_queue(dev, vring_idx);
2695 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
2698 unsigned int vq_num = 0;
2700 while (vq_num < dev->nr_vring) {
2701 struct vhost_virtqueue *vq = dev->virtqueue[i];
2704 rte_spinlock_lock(&vq->access_lock);
2712 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
2715 unsigned int vq_num = 0;
2717 while (vq_num < dev->nr_vring) {
2718 struct vhost_virtqueue *vq = dev->virtqueue[i];
2721 rte_spinlock_unlock(&vq->access_lock);
2729 vhost_user_msg_handler(int vid, int fd)
2731 struct virtio_net *dev;
2732 struct VhostUserMsg msg;
2733 struct rte_vdpa_device *vdpa_dev;
2735 int unlock_required = 0;
2740 dev = get_device(vid);
2744 if (!dev->notify_ops) {
2745 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2746 if (!dev->notify_ops) {
2747 VHOST_LOG_CONFIG(ERR,
2748 "failed to get callback ops for driver %s\n",
2754 ret = read_vhost_message(fd, &msg);
2757 VHOST_LOG_CONFIG(ERR,
2758 "vhost read message failed\n");
2760 VHOST_LOG_CONFIG(INFO,
2761 "vhost peer closed\n");
2767 request = msg.request.master;
2768 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2769 vhost_message_str[request]) {
2770 if (request != VHOST_USER_IOTLB_MSG)
2771 VHOST_LOG_CONFIG(INFO, "read message %s\n",
2772 vhost_message_str[request]);
2774 VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
2775 vhost_message_str[request]);
2777 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
2780 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2782 VHOST_LOG_CONFIG(ERR,
2783 "failed to alloc queue\n");
2788 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2789 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2790 * and device is destroyed. destroy_device waits for queues to be
2791 * inactive, so it is safe. Otherwise taking the access_lock
2792 * would cause a dead lock.
2795 case VHOST_USER_SET_FEATURES:
2796 case VHOST_USER_SET_PROTOCOL_FEATURES:
2797 case VHOST_USER_SET_OWNER:
2798 case VHOST_USER_SET_MEM_TABLE:
2799 case VHOST_USER_SET_LOG_BASE:
2800 case VHOST_USER_SET_LOG_FD:
2801 case VHOST_USER_SET_VRING_NUM:
2802 case VHOST_USER_SET_VRING_ADDR:
2803 case VHOST_USER_SET_VRING_BASE:
2804 case VHOST_USER_SET_VRING_KICK:
2805 case VHOST_USER_SET_VRING_CALL:
2806 case VHOST_USER_SET_VRING_ERR:
2807 case VHOST_USER_SET_VRING_ENABLE:
2808 case VHOST_USER_SEND_RARP:
2809 case VHOST_USER_NET_SET_MTU:
2810 case VHOST_USER_SET_SLAVE_REQ_FD:
2811 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2812 vhost_user_lock_all_queue_pairs(dev);
2813 unlock_required = 1;
2822 if (dev->extern_ops.pre_msg_handle) {
2823 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2826 case RTE_VHOST_MSG_RESULT_REPLY:
2827 send_vhost_reply(fd, &msg);
2829 case RTE_VHOST_MSG_RESULT_ERR:
2830 case RTE_VHOST_MSG_RESULT_OK:
2832 goto skip_to_post_handle;
2833 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2839 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2840 if (!vhost_message_handlers[request])
2841 goto skip_to_post_handle;
2842 ret = vhost_message_handlers[request](&dev, &msg, fd);
2845 case RTE_VHOST_MSG_RESULT_ERR:
2846 VHOST_LOG_CONFIG(ERR,
2847 "Processing %s failed.\n",
2848 vhost_message_str[request]);
2851 case RTE_VHOST_MSG_RESULT_OK:
2852 VHOST_LOG_CONFIG(DEBUG,
2853 "Processing %s succeeded.\n",
2854 vhost_message_str[request]);
2857 case RTE_VHOST_MSG_RESULT_REPLY:
2858 VHOST_LOG_CONFIG(DEBUG,
2859 "Processing %s succeeded and needs reply.\n",
2860 vhost_message_str[request]);
2861 send_vhost_reply(fd, &msg);
2869 skip_to_post_handle:
2870 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2871 dev->extern_ops.post_msg_handle) {
2872 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2875 case RTE_VHOST_MSG_RESULT_REPLY:
2876 send_vhost_reply(fd, &msg);
2878 case RTE_VHOST_MSG_RESULT_ERR:
2879 case RTE_VHOST_MSG_RESULT_OK:
2881 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2887 if (unlock_required)
2888 vhost_user_unlock_all_queue_pairs(dev);
2890 /* If message was not handled at this stage, treat it as an error */
2892 VHOST_LOG_CONFIG(ERR,
2893 "vhost message (req: %d) was not handled.\n", request);
2894 close_msg_fds(&msg);
2895 ret = RTE_VHOST_MSG_RESULT_ERR;
2899 * If the request required a reply that was already sent,
2900 * this optional reply-ack won't be sent as the
2901 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2903 if (msg.flags & VHOST_USER_NEED_REPLY) {
2904 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2905 msg.size = sizeof(msg.payload.u64);
2907 send_vhost_reply(fd, &msg);
2908 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2909 VHOST_LOG_CONFIG(ERR,
2910 "vhost message handling failed.\n");
2914 for (i = 0; i < dev->nr_vring; i++) {
2915 struct vhost_virtqueue *vq = dev->virtqueue[i];
2916 bool cur_ready = vq_is_ready(dev, vq);
2918 if (cur_ready != (vq && vq->ready)) {
2919 vhost_user_notify_queue_state(dev, i, cur_ready);
2920 vq->ready = cur_ready;
2925 if (!virtio_is_ready(dev))
2929 * Virtio is now ready. If not done already, it is time
2930 * to notify the application it can process the rings and
2931 * configure the vDPA device if present.
2934 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
2935 if (dev->notify_ops->new_device(dev->vid) == 0)
2936 dev->flags |= VIRTIO_DEV_RUNNING;
2939 vdpa_dev = dev->vdpa_dev;
2943 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2944 if (vdpa_dev->ops->dev_conf(dev->vid))
2945 VHOST_LOG_CONFIG(ERR,
2946 "Failed to configure vDPA device\n");
2948 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
2955 static int process_slave_message_reply(struct virtio_net *dev,
2956 const struct VhostUserMsg *msg)
2958 struct VhostUserMsg msg_reply;
2961 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
2964 ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
2967 VHOST_LOG_CONFIG(ERR,
2968 "vhost read slave message reply failed\n");
2970 VHOST_LOG_CONFIG(INFO,
2971 "vhost peer closed\n");
2977 if (msg_reply.request.slave != msg->request.slave) {
2978 VHOST_LOG_CONFIG(ERR,
2979 "Received unexpected msg type (%u), expected %u\n",
2980 msg_reply.request.slave, msg->request.slave);
2985 ret = msg_reply.payload.u64 ? -1 : 0;
2988 rte_spinlock_unlock(&dev->slave_req_lock);
2993 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
2996 struct VhostUserMsg msg = {
2997 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
2998 .flags = VHOST_USER_VERSION,
2999 .size = sizeof(msg.payload.iotlb),
3003 .type = VHOST_IOTLB_MISS,
3007 ret = send_vhost_message(dev->slave_req_fd, &msg);
3009 VHOST_LOG_CONFIG(ERR,
3010 "Failed to send IOTLB miss message (%d)\n",
3019 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
3022 struct VhostUserMsg msg = {
3023 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
3024 .flags = VHOST_USER_VERSION,
3029 msg.flags |= VHOST_USER_NEED_REPLY;
3031 ret = send_vhost_slave_message(dev, &msg);
3033 VHOST_LOG_CONFIG(ERR,
3034 "Failed to send config change (%d)\n",
3039 return process_slave_message_reply(dev, &msg);
3043 rte_vhost_slave_config_change(int vid, bool need_reply)
3045 struct virtio_net *dev;
3047 dev = get_device(vid);
3051 return vhost_user_slave_config_change(dev, need_reply);
3054 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
3060 struct VhostUserMsg msg = {
3061 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
3062 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
3063 .size = sizeof(msg.payload.area),
3065 .u64 = index & VHOST_USER_VRING_IDX_MASK,
3072 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
3078 ret = send_vhost_slave_message(dev, &msg);
3080 VHOST_LOG_CONFIG(ERR,
3081 "Failed to set host notifier (%d)\n", ret);
3085 return process_slave_message_reply(dev, &msg);
3088 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
3090 struct virtio_net *dev;
3091 struct rte_vdpa_device *vdpa_dev;
3092 int vfio_device_fd, ret = 0;
3093 uint64_t offset, size;
3094 unsigned int i, q_start, q_last;
3096 dev = get_device(vid);
3100 vdpa_dev = dev->vdpa_dev;
3101 if (vdpa_dev == NULL)
3104 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
3105 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
3106 !(dev->protocol_features &
3107 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
3108 !(dev->protocol_features &
3109 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
3110 !(dev->protocol_features &
3111 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
3114 if (qid == RTE_VHOST_QUEUE_ALL) {
3116 q_last = dev->nr_vring - 1;
3118 if (qid >= dev->nr_vring)
3124 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
3125 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
3127 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
3128 if (vfio_device_fd < 0)
3132 for (i = q_start; i <= q_last; i++) {
3133 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
3139 if (vhost_user_slave_set_vring_host_notifier(dev, i,
3140 vfio_device_fd, offset, size) < 0) {
3147 for (i = q_start; i <= q_last; i++) {
3148 vhost_user_slave_set_vring_host_notifier(dev, i, -1,