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;
238 struct vhost_virtqueue *vq = dev->virtqueue[index];
240 /* Configure guest notifications on enable */
241 if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF)
242 vhost_enable_guest_notification(dev, vq, vq->notif_enable);
244 if (vdpa_dev && vdpa_dev->ops->set_vring_state)
245 vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
247 if (dev->notify_ops->vring_state_changed)
248 dev->notify_ops->vring_state_changed(dev->vid,
253 * This function just returns success at the moment unless
254 * the device hasn't been initialised.
257 vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
258 struct VhostUserMsg *msg,
259 int main_fd __rte_unused)
261 if (validate_msg_fds(msg, 0) != 0)
262 return RTE_VHOST_MSG_RESULT_ERR;
264 return RTE_VHOST_MSG_RESULT_OK;
268 vhost_user_reset_owner(struct virtio_net **pdev,
269 struct VhostUserMsg *msg,
270 int main_fd __rte_unused)
272 struct virtio_net *dev = *pdev;
274 if (validate_msg_fds(msg, 0) != 0)
275 return RTE_VHOST_MSG_RESULT_ERR;
277 vhost_destroy_device_notify(dev);
279 cleanup_device(dev, 0);
281 return RTE_VHOST_MSG_RESULT_OK;
285 * The features that we support are requested.
288 vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
289 int main_fd __rte_unused)
291 struct virtio_net *dev = *pdev;
292 uint64_t features = 0;
294 if (validate_msg_fds(msg, 0) != 0)
295 return RTE_VHOST_MSG_RESULT_ERR;
297 rte_vhost_driver_get_features(dev->ifname, &features);
299 msg->payload.u64 = features;
300 msg->size = sizeof(msg->payload.u64);
303 return RTE_VHOST_MSG_RESULT_REPLY;
307 * The queue number that we support are requested.
310 vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
311 int main_fd __rte_unused)
313 struct virtio_net *dev = *pdev;
314 uint32_t queue_num = 0;
316 if (validate_msg_fds(msg, 0) != 0)
317 return RTE_VHOST_MSG_RESULT_ERR;
319 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
321 msg->payload.u64 = (uint64_t)queue_num;
322 msg->size = sizeof(msg->payload.u64);
325 return RTE_VHOST_MSG_RESULT_REPLY;
329 * We receive the negotiated features supported by us and the virtio device.
332 vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
333 int main_fd __rte_unused)
335 struct virtio_net *dev = *pdev;
336 uint64_t features = msg->payload.u64;
337 uint64_t vhost_features = 0;
338 struct rte_vdpa_device *vdpa_dev;
340 if (validate_msg_fds(msg, 0) != 0)
341 return RTE_VHOST_MSG_RESULT_ERR;
343 rte_vhost_driver_get_features(dev->ifname, &vhost_features);
344 if (features & ~vhost_features) {
345 VHOST_LOG_CONFIG(ERR,
346 "(%d) received invalid negotiated features.\n",
348 dev->flags |= VIRTIO_DEV_FEATURES_FAILED;
349 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
351 return RTE_VHOST_MSG_RESULT_ERR;
354 if (dev->flags & VIRTIO_DEV_RUNNING) {
355 if (dev->features == features)
356 return RTE_VHOST_MSG_RESULT_OK;
359 * Error out if master tries to change features while device is
360 * in running state. The exception being VHOST_F_LOG_ALL, which
361 * is enabled when the live-migration starts.
363 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
364 VHOST_LOG_CONFIG(ERR,
365 "(%d) features changed while device is running.\n",
367 return RTE_VHOST_MSG_RESULT_ERR;
370 if (dev->notify_ops->features_changed)
371 dev->notify_ops->features_changed(dev->vid, features);
374 dev->features = features;
376 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
377 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
379 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
381 VHOST_LOG_CONFIG(INFO,
382 "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
383 VHOST_LOG_CONFIG(DEBUG,
384 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
386 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
387 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
389 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
390 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
392 * Remove all but first queue pair if MQ hasn't been
393 * negotiated. This is safe because the device is not
394 * running at this stage.
396 while (dev->nr_vring > 2) {
397 struct vhost_virtqueue *vq;
399 vq = dev->virtqueue[--dev->nr_vring];
403 dev->virtqueue[dev->nr_vring] = NULL;
405 cleanup_vq_inflight(dev, vq);
410 vdpa_dev = dev->vdpa_dev;
412 vdpa_dev->ops->set_features(dev->vid);
414 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED;
415 return RTE_VHOST_MSG_RESULT_OK;
419 * The virtio device sends us the size of the descriptor ring.
422 vhost_user_set_vring_num(struct virtio_net **pdev,
423 struct VhostUserMsg *msg,
424 int main_fd __rte_unused)
426 struct virtio_net *dev = *pdev;
427 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
429 if (validate_msg_fds(msg, 0) != 0)
430 return RTE_VHOST_MSG_RESULT_ERR;
432 vq->size = msg->payload.state.num;
434 /* VIRTIO 1.0, 2.4 Virtqueues says:
436 * Queue Size value is always a power of 2. The maximum Queue Size
439 * VIRTIO 1.1 2.7 Virtqueues says:
441 * Packed virtqueues support up to 2^15 entries each.
443 if (!vq_is_packed(dev)) {
444 if (vq->size & (vq->size - 1)) {
445 VHOST_LOG_CONFIG(ERR,
446 "invalid virtqueue size %u\n", vq->size);
447 return RTE_VHOST_MSG_RESULT_ERR;
451 if (vq->size > 32768) {
452 VHOST_LOG_CONFIG(ERR,
453 "invalid virtqueue size %u\n", vq->size);
454 return RTE_VHOST_MSG_RESULT_ERR;
457 if (dev->dequeue_zero_copy) {
459 vq->last_zmbuf_idx = 0;
460 vq->zmbuf_size = vq->size;
462 rte_free(vq->zmbufs);
463 vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
464 sizeof(struct zcopy_mbuf), 0);
465 if (vq->zmbufs == NULL) {
466 VHOST_LOG_CONFIG(WARNING,
467 "failed to allocate mem for zero copy; "
468 "zero copy is force disabled\n");
469 dev->dequeue_zero_copy = 0;
471 TAILQ_INIT(&vq->zmbuf_list);
474 if (vq_is_packed(dev)) {
475 if (vq->shadow_used_packed)
476 rte_free(vq->shadow_used_packed);
477 vq->shadow_used_packed = rte_malloc(NULL,
479 sizeof(struct vring_used_elem_packed),
480 RTE_CACHE_LINE_SIZE);
481 if (!vq->shadow_used_packed) {
482 VHOST_LOG_CONFIG(ERR,
483 "failed to allocate memory for shadow used ring.\n");
484 return RTE_VHOST_MSG_RESULT_ERR;
488 if (vq->shadow_used_split)
489 rte_free(vq->shadow_used_split);
491 vq->shadow_used_split = rte_malloc(NULL,
492 vq->size * sizeof(struct vring_used_elem),
493 RTE_CACHE_LINE_SIZE);
495 if (!vq->shadow_used_split) {
496 VHOST_LOG_CONFIG(ERR,
497 "failed to allocate memory for vq internal data.\n");
498 return RTE_VHOST_MSG_RESULT_ERR;
502 if (vq->batch_copy_elems)
503 rte_free(vq->batch_copy_elems);
504 vq->batch_copy_elems = rte_malloc(NULL,
505 vq->size * sizeof(struct batch_copy_elem),
506 RTE_CACHE_LINE_SIZE);
507 if (!vq->batch_copy_elems) {
508 VHOST_LOG_CONFIG(ERR,
509 "failed to allocate memory for batching copy.\n");
510 return RTE_VHOST_MSG_RESULT_ERR;
513 return RTE_VHOST_MSG_RESULT_OK;
517 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
518 * same numa node as the memory of vring descriptor.
520 #ifdef RTE_LIBRTE_VHOST_NUMA
521 static struct virtio_net*
522 numa_realloc(struct virtio_net *dev, int index)
524 int oldnode, newnode;
525 struct virtio_net *old_dev;
526 struct vhost_virtqueue *old_vq, *vq;
527 struct zcopy_mbuf *new_zmbuf;
528 struct vring_used_elem *new_shadow_used_split;
529 struct vring_used_elem_packed *new_shadow_used_packed;
530 struct batch_copy_elem *new_batch_copy_elems;
533 if (dev->flags & VIRTIO_DEV_RUNNING)
537 vq = old_vq = dev->virtqueue[index];
539 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
540 MPOL_F_NODE | MPOL_F_ADDR);
542 /* check if we need to reallocate vq */
543 ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
544 MPOL_F_NODE | MPOL_F_ADDR);
546 VHOST_LOG_CONFIG(ERR,
547 "Unable to get vq numa information.\n");
550 if (oldnode != newnode) {
551 VHOST_LOG_CONFIG(INFO,
552 "reallocate vq from %d to %d node\n", oldnode, newnode);
553 vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
557 memcpy(vq, old_vq, sizeof(*vq));
558 TAILQ_INIT(&vq->zmbuf_list);
560 if (dev->dequeue_zero_copy) {
561 new_zmbuf = rte_malloc_socket(NULL, vq->zmbuf_size *
562 sizeof(struct zcopy_mbuf), 0, newnode);
564 rte_free(vq->zmbufs);
565 vq->zmbufs = new_zmbuf;
569 if (vq_is_packed(dev)) {
570 new_shadow_used_packed = rte_malloc_socket(NULL,
572 sizeof(struct vring_used_elem_packed),
575 if (new_shadow_used_packed) {
576 rte_free(vq->shadow_used_packed);
577 vq->shadow_used_packed = new_shadow_used_packed;
580 new_shadow_used_split = rte_malloc_socket(NULL,
582 sizeof(struct vring_used_elem),
585 if (new_shadow_used_split) {
586 rte_free(vq->shadow_used_split);
587 vq->shadow_used_split = new_shadow_used_split;
591 new_batch_copy_elems = rte_malloc_socket(NULL,
592 vq->size * sizeof(struct batch_copy_elem),
595 if (new_batch_copy_elems) {
596 rte_free(vq->batch_copy_elems);
597 vq->batch_copy_elems = new_batch_copy_elems;
603 /* check if we need to reallocate dev */
604 ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
605 MPOL_F_NODE | MPOL_F_ADDR);
607 VHOST_LOG_CONFIG(ERR,
608 "Unable to get dev numa information.\n");
611 if (oldnode != newnode) {
612 VHOST_LOG_CONFIG(INFO,
613 "reallocate dev from %d to %d node\n",
615 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
621 memcpy(dev, old_dev, sizeof(*dev));
626 dev->virtqueue[index] = vq;
627 vhost_devices[dev->vid] = dev;
630 vhost_user_iotlb_init(dev, index);
635 static struct virtio_net*
636 numa_realloc(struct virtio_net *dev, int index __rte_unused)
642 /* Converts QEMU virtual address to Vhost virtual address. */
644 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
646 struct rte_vhost_mem_region *r;
649 if (unlikely(!dev || !dev->mem))
652 /* Find the region where the address lives. */
653 for (i = 0; i < dev->mem->nregions; i++) {
654 r = &dev->mem->regions[i];
656 if (qva >= r->guest_user_addr &&
657 qva < r->guest_user_addr + r->size) {
659 if (unlikely(*len > r->guest_user_addr + r->size - qva))
660 *len = r->guest_user_addr + r->size - qva;
662 return qva - r->guest_user_addr +
674 * Converts ring address to Vhost virtual address.
675 * If IOMMU is enabled, the ring address is a guest IO virtual address,
676 * else it is a QEMU virtual address.
679 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
680 uint64_t ra, uint64_t *size)
682 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
685 vhost_user_iotlb_rd_lock(vq);
686 vva = vhost_iova_to_vva(dev, vq, ra,
687 size, VHOST_ACCESS_RW);
688 vhost_user_iotlb_rd_unlock(vq);
693 return qva_to_vva(dev, ra, size);
697 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
701 vhost_user_iotlb_rd_lock(vq);
702 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
703 vhost_user_iotlb_rd_unlock(vq);
708 static struct virtio_net *
709 translate_ring_addresses(struct virtio_net *dev, int vq_index)
711 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
712 struct vhost_vring_addr *addr = &vq->ring_addrs;
713 uint64_t len, expected_len;
715 if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
717 log_addr_to_gpa(dev, vq);
718 if (vq->log_guest_addr == 0) {
719 VHOST_LOG_CONFIG(DEBUG,
720 "(%d) failed to map log_guest_addr.\n",
726 if (vq_is_packed(dev)) {
727 len = sizeof(struct vring_packed_desc) * vq->size;
728 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
729 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
730 if (vq->desc_packed == NULL ||
731 len != sizeof(struct vring_packed_desc) *
733 VHOST_LOG_CONFIG(DEBUG,
734 "(%d) failed to map desc_packed ring.\n",
739 dev = numa_realloc(dev, vq_index);
740 vq = dev->virtqueue[vq_index];
741 addr = &vq->ring_addrs;
743 len = sizeof(struct vring_packed_desc_event);
744 vq->driver_event = (struct vring_packed_desc_event *)
745 (uintptr_t)ring_addr_to_vva(dev,
746 vq, addr->avail_user_addr, &len);
747 if (vq->driver_event == NULL ||
748 len != sizeof(struct vring_packed_desc_event)) {
749 VHOST_LOG_CONFIG(DEBUG,
750 "(%d) failed to find driver area address.\n",
755 len = sizeof(struct vring_packed_desc_event);
756 vq->device_event = (struct vring_packed_desc_event *)
757 (uintptr_t)ring_addr_to_vva(dev,
758 vq, addr->used_user_addr, &len);
759 if (vq->device_event == NULL ||
760 len != sizeof(struct vring_packed_desc_event)) {
761 VHOST_LOG_CONFIG(DEBUG,
762 "(%d) failed to find device area address.\n",
771 /* The addresses are converted from QEMU virtual to Vhost virtual. */
772 if (vq->desc && vq->avail && vq->used)
775 len = sizeof(struct vring_desc) * vq->size;
776 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
777 vq, addr->desc_user_addr, &len);
778 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
779 VHOST_LOG_CONFIG(DEBUG,
780 "(%d) failed to map desc ring.\n",
785 dev = numa_realloc(dev, vq_index);
786 vq = dev->virtqueue[vq_index];
787 addr = &vq->ring_addrs;
789 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
790 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
791 len += sizeof(uint16_t);
793 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
794 vq, addr->avail_user_addr, &len);
795 if (vq->avail == 0 || len != expected_len) {
796 VHOST_LOG_CONFIG(DEBUG,
797 "(%d) failed to map avail ring.\n",
802 len = sizeof(struct vring_used) +
803 sizeof(struct vring_used_elem) * vq->size;
804 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
805 len += sizeof(uint16_t);
807 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
808 vq, addr->used_user_addr, &len);
809 if (vq->used == 0 || len != expected_len) {
810 VHOST_LOG_CONFIG(DEBUG,
811 "(%d) failed to map used ring.\n",
816 if (vq->last_used_idx != vq->used->idx) {
817 VHOST_LOG_CONFIG(WARNING,
818 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
819 "some packets maybe resent for Tx and dropped for Rx\n",
820 vq->last_used_idx, vq->used->idx);
821 vq->last_used_idx = vq->used->idx;
822 vq->last_avail_idx = vq->used->idx;
827 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
829 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
830 dev->vid, vq->avail);
831 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
833 VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
834 dev->vid, vq->log_guest_addr);
840 * The virtio device sends us the desc, used and avail ring addresses.
841 * This function then converts these to our address space.
844 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
845 int main_fd __rte_unused)
847 struct virtio_net *dev = *pdev;
848 struct vhost_virtqueue *vq;
849 struct vhost_vring_addr *addr = &msg->payload.addr;
852 if (validate_msg_fds(msg, 0) != 0)
853 return RTE_VHOST_MSG_RESULT_ERR;
855 if (dev->mem == NULL)
856 return RTE_VHOST_MSG_RESULT_ERR;
858 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
859 vq = dev->virtqueue[msg->payload.addr.index];
861 access_ok = vq->access_ok;
864 * Rings addresses should not be interpreted as long as the ring is not
865 * started and enabled
867 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
869 vring_invalidate(dev, vq);
871 if ((vq->enabled && (dev->features &
872 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
874 dev = translate_ring_addresses(dev, msg->payload.addr.index);
876 return RTE_VHOST_MSG_RESULT_ERR;
881 return RTE_VHOST_MSG_RESULT_OK;
885 * The virtio device sends us the available ring last used index.
888 vhost_user_set_vring_base(struct virtio_net **pdev,
889 struct VhostUserMsg *msg,
890 int main_fd __rte_unused)
892 struct virtio_net *dev = *pdev;
893 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
894 uint64_t val = msg->payload.state.num;
896 if (validate_msg_fds(msg, 0) != 0)
897 return RTE_VHOST_MSG_RESULT_ERR;
899 if (vq_is_packed(dev)) {
901 * Bit[0:14]: avail index
902 * Bit[15]: avail wrap counter
904 vq->last_avail_idx = val & 0x7fff;
905 vq->avail_wrap_counter = !!(val & (0x1 << 15));
907 * Set used index to same value as available one, as
908 * their values should be the same since ring processing
909 * was stopped at get time.
911 vq->last_used_idx = vq->last_avail_idx;
912 vq->used_wrap_counter = vq->avail_wrap_counter;
914 vq->last_used_idx = msg->payload.state.num;
915 vq->last_avail_idx = msg->payload.state.num;
918 return RTE_VHOST_MSG_RESULT_OK;
922 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
923 uint64_t host_phys_addr, uint64_t size)
925 struct guest_page *page, *last_page;
926 struct guest_page *old_pages;
928 if (dev->nr_guest_pages == dev->max_guest_pages) {
929 dev->max_guest_pages *= 2;
930 old_pages = dev->guest_pages;
931 dev->guest_pages = rte_realloc(dev->guest_pages,
932 dev->max_guest_pages * sizeof(*page),
933 RTE_CACHE_LINE_SIZE);
934 if (dev->guest_pages == NULL) {
935 VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
941 if (dev->nr_guest_pages > 0) {
942 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
943 /* merge if the two pages are continuous */
944 if (host_phys_addr == last_page->host_phys_addr +
946 last_page->size += size;
951 page = &dev->guest_pages[dev->nr_guest_pages++];
952 page->guest_phys_addr = guest_phys_addr;
953 page->host_phys_addr = host_phys_addr;
960 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
963 uint64_t reg_size = reg->size;
964 uint64_t host_user_addr = reg->host_user_addr;
965 uint64_t guest_phys_addr = reg->guest_phys_addr;
966 uint64_t host_phys_addr;
969 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
970 size = page_size - (guest_phys_addr & (page_size - 1));
971 size = RTE_MIN(size, reg_size);
973 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
976 host_user_addr += size;
977 guest_phys_addr += size;
980 while (reg_size > 0) {
981 size = RTE_MIN(reg_size, page_size);
982 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
984 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
988 host_user_addr += size;
989 guest_phys_addr += size;
993 /* sort guest page array if over binary search threshold */
994 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
995 qsort((void *)dev->guest_pages, dev->nr_guest_pages,
996 sizeof(struct guest_page), guest_page_addrcmp);
1002 #ifdef RTE_LIBRTE_VHOST_DEBUG
1003 /* TODO: enable it only in debug mode? */
1005 dump_guest_pages(struct virtio_net *dev)
1008 struct guest_page *page;
1010 for (i = 0; i < dev->nr_guest_pages; i++) {
1011 page = &dev->guest_pages[i];
1013 VHOST_LOG_CONFIG(INFO,
1014 "guest physical page region %u\n"
1015 "\t guest_phys_addr: %" PRIx64 "\n"
1016 "\t host_phys_addr : %" PRIx64 "\n"
1017 "\t size : %" PRIx64 "\n",
1019 page->guest_phys_addr,
1020 page->host_phys_addr,
1025 #define dump_guest_pages(dev)
1029 vhost_memory_changed(struct VhostUserMemory *new,
1030 struct rte_vhost_memory *old)
1034 if (new->nregions != old->nregions)
1037 for (i = 0; i < new->nregions; ++i) {
1038 VhostUserMemoryRegion *new_r = &new->regions[i];
1039 struct rte_vhost_mem_region *old_r = &old->regions[i];
1041 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
1043 if (new_r->memory_size != old_r->size)
1045 if (new_r->userspace_addr != old_r->guest_user_addr)
1053 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
1056 struct virtio_net *dev = *pdev;
1057 struct VhostUserMemory *memory = &msg->payload.memory;
1058 struct rte_vhost_mem_region *reg;
1061 uint64_t mmap_offset;
1067 if (validate_msg_fds(msg, memory->nregions) != 0)
1068 return RTE_VHOST_MSG_RESULT_ERR;
1070 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
1071 VHOST_LOG_CONFIG(ERR,
1072 "too many memory regions (%u)\n", memory->nregions);
1073 return RTE_VHOST_MSG_RESULT_ERR;
1076 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
1077 VHOST_LOG_CONFIG(INFO,
1078 "(%d) memory regions not changed\n", dev->vid);
1082 return RTE_VHOST_MSG_RESULT_OK;
1086 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
1087 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
1089 if (vdpa_dev && vdpa_dev->ops->dev_close)
1090 vdpa_dev->ops->dev_close(dev->vid);
1091 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1093 free_mem_region(dev);
1098 /* Flush IOTLB cache as previous HVAs are now invalid */
1099 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
1100 for (i = 0; i < dev->nr_vring; i++)
1101 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
1103 dev->nr_guest_pages = 0;
1104 if (dev->guest_pages == NULL) {
1105 dev->max_guest_pages = 8;
1106 dev->guest_pages = rte_zmalloc(NULL,
1107 dev->max_guest_pages *
1108 sizeof(struct guest_page),
1109 RTE_CACHE_LINE_SIZE);
1110 if (dev->guest_pages == NULL) {
1111 VHOST_LOG_CONFIG(ERR,
1112 "(%d) failed to allocate memory "
1113 "for dev->guest_pages\n",
1115 return RTE_VHOST_MSG_RESULT_ERR;
1119 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
1120 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
1121 if (dev->mem == NULL) {
1122 VHOST_LOG_CONFIG(ERR,
1123 "(%d) failed to allocate memory for dev->mem\n",
1125 return RTE_VHOST_MSG_RESULT_ERR;
1127 dev->mem->nregions = memory->nregions;
1129 for (i = 0; i < memory->nregions; i++) {
1131 reg = &dev->mem->regions[i];
1133 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1134 reg->guest_user_addr = memory->regions[i].userspace_addr;
1135 reg->size = memory->regions[i].memory_size;
1138 mmap_offset = memory->regions[i].mmap_offset;
1140 /* Check for memory_size + mmap_offset overflow */
1141 if (mmap_offset >= -reg->size) {
1142 VHOST_LOG_CONFIG(ERR,
1143 "mmap_offset (%#"PRIx64") and memory_size "
1144 "(%#"PRIx64") overflow\n",
1145 mmap_offset, reg->size);
1149 mmap_size = reg->size + mmap_offset;
1151 /* mmap() without flag of MAP_ANONYMOUS, should be called
1152 * with length argument aligned with hugepagesz at older
1153 * longterm version Linux, like 2.6.32 and 3.2.72, or
1154 * mmap() will fail with EINVAL.
1156 * to avoid failure, make sure in caller to keep length
1159 alignment = get_blk_size(fd);
1160 if (alignment == (uint64_t)-1) {
1161 VHOST_LOG_CONFIG(ERR,
1162 "couldn't get hugepage size through fstat\n");
1165 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1166 if (mmap_size == 0) {
1168 * It could happen if initial mmap_size + alignment
1169 * overflows the sizeof uint64, which could happen if
1170 * either mmap_size or alignment value is wrong.
1172 * mmap() kernel implementation would return an error,
1173 * but better catch it before and provide useful info
1176 VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
1177 "or alignment (0x%" PRIx64 ") is invalid\n",
1178 reg->size + mmap_offset, alignment);
1182 populate = (dev->dequeue_zero_copy || dev->async_copy) ?
1184 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1185 MAP_SHARED | populate, fd, 0);
1187 if (mmap_addr == MAP_FAILED) {
1188 VHOST_LOG_CONFIG(ERR,
1189 "mmap region %u failed.\n", i);
1193 reg->mmap_addr = mmap_addr;
1194 reg->mmap_size = mmap_size;
1195 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
1198 if (dev->dequeue_zero_copy || dev->async_copy)
1199 if (add_guest_pages(dev, reg, alignment) < 0) {
1200 VHOST_LOG_CONFIG(ERR,
1201 "adding guest pages to region %u failed.\n",
1206 VHOST_LOG_CONFIG(INFO,
1207 "guest memory region %u, size: 0x%" PRIx64 "\n"
1208 "\t guest physical addr: 0x%" PRIx64 "\n"
1209 "\t guest virtual addr: 0x%" PRIx64 "\n"
1210 "\t host virtual addr: 0x%" PRIx64 "\n"
1211 "\t mmap addr : 0x%" PRIx64 "\n"
1212 "\t mmap size : 0x%" PRIx64 "\n"
1213 "\t mmap align: 0x%" PRIx64 "\n"
1214 "\t mmap off : 0x%" PRIx64 "\n",
1216 reg->guest_phys_addr,
1217 reg->guest_user_addr,
1218 reg->host_user_addr,
1219 (uint64_t)(uintptr_t)mmap_addr,
1224 if (dev->postcopy_listening) {
1226 * We haven't a better way right now than sharing
1227 * DPDK's virtual address with Qemu, so that Qemu can
1228 * retrieve the region offset when handling userfaults.
1230 memory->regions[i].userspace_addr =
1231 reg->host_user_addr;
1234 if (dev->postcopy_listening) {
1235 /* Send the addresses back to qemu */
1237 send_vhost_reply(main_fd, msg);
1239 /* Wait for qemu to acknolwedge it's got the addresses
1240 * we've got to wait before we're allowed to generate faults.
1242 VhostUserMsg ack_msg;
1243 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1244 VHOST_LOG_CONFIG(ERR,
1245 "Failed to read qemu ack on postcopy set-mem-table\n");
1249 if (validate_msg_fds(&ack_msg, 0) != 0)
1252 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1253 VHOST_LOG_CONFIG(ERR,
1254 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1255 ack_msg.request.master);
1259 /* Now userfault register and we can use the memory */
1260 for (i = 0; i < memory->nregions; i++) {
1261 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1262 reg = &dev->mem->regions[i];
1263 struct uffdio_register reg_struct;
1266 * Let's register all the mmap'ed area to ensure
1267 * alignment on page boundary.
1269 reg_struct.range.start =
1270 (uint64_t)(uintptr_t)reg->mmap_addr;
1271 reg_struct.range.len = reg->mmap_size;
1272 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1274 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1276 VHOST_LOG_CONFIG(ERR,
1277 "Failed to register ufd for region %d: (ufd = %d) %s\n",
1278 i, dev->postcopy_ufd,
1282 VHOST_LOG_CONFIG(INFO,
1283 "\t userfaultfd registered for range : "
1284 "%" PRIx64 " - %" PRIx64 "\n",
1285 (uint64_t)reg_struct.range.start,
1286 (uint64_t)reg_struct.range.start +
1287 (uint64_t)reg_struct.range.len - 1);
1294 for (i = 0; i < dev->nr_vring; i++) {
1295 struct vhost_virtqueue *vq = dev->virtqueue[i];
1297 if (vq->desc || vq->avail || vq->used) {
1299 * If the memory table got updated, the ring addresses
1300 * need to be translated again as virtual addresses have
1303 vring_invalidate(dev, vq);
1305 dev = translate_ring_addresses(dev, i);
1315 dump_guest_pages(dev);
1317 return RTE_VHOST_MSG_RESULT_OK;
1320 free_mem_region(dev);
1323 return RTE_VHOST_MSG_RESULT_ERR;
1327 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1334 if (vq_is_packed(dev))
1335 rings_ok = vq->desc_packed && vq->driver_event &&
1338 rings_ok = vq->desc && vq->avail && vq->used;
1341 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1342 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1346 #define VIRTIO_DEV_NUM_VQS_TO_BE_READY 2u
1349 virtio_is_ready(struct virtio_net *dev)
1351 struct vhost_virtqueue *vq;
1354 if (dev->flags & VIRTIO_DEV_READY)
1357 if (dev->nr_vring < VIRTIO_DEV_NUM_VQS_TO_BE_READY)
1360 for (i = 0; i < VIRTIO_DEV_NUM_VQS_TO_BE_READY; i++) {
1361 vq = dev->virtqueue[i];
1363 if (!vq_is_ready(dev, vq))
1367 /* If supported, ensure the frontend is really done with config */
1368 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
1369 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
1372 dev->flags |= VIRTIO_DEV_READY;
1374 if (!(dev->flags & VIRTIO_DEV_RUNNING))
1375 VHOST_LOG_CONFIG(INFO,
1376 "virtio is now ready for processing.\n");
1381 inflight_mem_alloc(const char *name, size_t size, int *fd)
1385 char fname[20] = "/tmp/memfd-XXXXXX";
1388 #ifdef MEMFD_SUPPORTED
1389 mfd = memfd_create(name, MFD_CLOEXEC);
1394 mfd = mkstemp(fname);
1396 VHOST_LOG_CONFIG(ERR,
1397 "failed to get inflight buffer fd\n");
1404 if (ftruncate(mfd, size) == -1) {
1405 VHOST_LOG_CONFIG(ERR,
1406 "failed to alloc inflight buffer\n");
1411 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
1412 if (ptr == MAP_FAILED) {
1413 VHOST_LOG_CONFIG(ERR,
1414 "failed to mmap inflight buffer\n");
1424 get_pervq_shm_size_split(uint16_t queue_size)
1426 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
1427 queue_size + sizeof(uint64_t) +
1428 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
1432 get_pervq_shm_size_packed(uint16_t queue_size)
1434 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
1435 * queue_size + sizeof(uint64_t) +
1436 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
1437 INFLIGHT_ALIGNMENT);
1441 vhost_user_get_inflight_fd(struct virtio_net **pdev,
1443 int main_fd __rte_unused)
1445 struct rte_vhost_inflight_info_packed *inflight_packed;
1446 uint64_t pervq_inflight_size, mmap_size;
1447 uint16_t num_queues, queue_size;
1448 struct virtio_net *dev = *pdev;
1452 if (msg->size != sizeof(msg->payload.inflight)) {
1453 VHOST_LOG_CONFIG(ERR,
1454 "invalid get_inflight_fd message size is %d\n",
1456 return RTE_VHOST_MSG_RESULT_ERR;
1459 if (dev->inflight_info == NULL) {
1460 dev->inflight_info = calloc(1,
1461 sizeof(struct inflight_mem_info));
1462 if (!dev->inflight_info) {
1463 VHOST_LOG_CONFIG(ERR,
1464 "failed to alloc dev inflight area\n");
1465 return RTE_VHOST_MSG_RESULT_ERR;
1467 dev->inflight_info->fd = -1;
1470 num_queues = msg->payload.inflight.num_queues;
1471 queue_size = msg->payload.inflight.queue_size;
1473 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
1474 msg->payload.inflight.num_queues);
1475 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
1476 msg->payload.inflight.queue_size);
1478 if (vq_is_packed(dev))
1479 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1481 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1483 mmap_size = num_queues * pervq_inflight_size;
1484 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
1486 VHOST_LOG_CONFIG(ERR,
1487 "failed to alloc vhost inflight area\n");
1488 msg->payload.inflight.mmap_size = 0;
1489 return RTE_VHOST_MSG_RESULT_ERR;
1491 memset(addr, 0, mmap_size);
1493 if (dev->inflight_info->addr) {
1494 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1495 dev->inflight_info->addr = NULL;
1498 if (dev->inflight_info->fd >= 0) {
1499 close(dev->inflight_info->fd);
1500 dev->inflight_info->fd = -1;
1503 dev->inflight_info->addr = addr;
1504 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
1505 dev->inflight_info->fd = msg->fds[0] = fd;
1506 msg->payload.inflight.mmap_offset = 0;
1509 if (vq_is_packed(dev)) {
1510 for (i = 0; i < num_queues; i++) {
1512 (struct rte_vhost_inflight_info_packed *)addr;
1513 inflight_packed->used_wrap_counter = 1;
1514 inflight_packed->old_used_wrap_counter = 1;
1515 for (j = 0; j < queue_size; j++)
1516 inflight_packed->desc[j].next = j + 1;
1517 addr = (void *)((char *)addr + pervq_inflight_size);
1521 VHOST_LOG_CONFIG(INFO,
1522 "send inflight mmap_size: %"PRIu64"\n",
1523 msg->payload.inflight.mmap_size);
1524 VHOST_LOG_CONFIG(INFO,
1525 "send inflight mmap_offset: %"PRIu64"\n",
1526 msg->payload.inflight.mmap_offset);
1527 VHOST_LOG_CONFIG(INFO,
1528 "send inflight fd: %d\n", msg->fds[0]);
1530 return RTE_VHOST_MSG_RESULT_REPLY;
1534 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
1535 int main_fd __rte_unused)
1537 uint64_t mmap_size, mmap_offset;
1538 uint16_t num_queues, queue_size;
1539 struct virtio_net *dev = *pdev;
1540 uint32_t pervq_inflight_size;
1541 struct vhost_virtqueue *vq;
1546 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
1547 VHOST_LOG_CONFIG(ERR,
1548 "invalid set_inflight_fd message size is %d,fd is %d\n",
1550 return RTE_VHOST_MSG_RESULT_ERR;
1553 mmap_size = msg->payload.inflight.mmap_size;
1554 mmap_offset = msg->payload.inflight.mmap_offset;
1555 num_queues = msg->payload.inflight.num_queues;
1556 queue_size = msg->payload.inflight.queue_size;
1558 if (vq_is_packed(dev))
1559 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1561 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1563 VHOST_LOG_CONFIG(INFO,
1564 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
1565 VHOST_LOG_CONFIG(INFO,
1566 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
1567 VHOST_LOG_CONFIG(INFO,
1568 "set_inflight_fd num_queues: %u\n", num_queues);
1569 VHOST_LOG_CONFIG(INFO,
1570 "set_inflight_fd queue_size: %u\n", queue_size);
1571 VHOST_LOG_CONFIG(INFO,
1572 "set_inflight_fd fd: %d\n", fd);
1573 VHOST_LOG_CONFIG(INFO,
1574 "set_inflight_fd pervq_inflight_size: %d\n",
1575 pervq_inflight_size);
1577 if (!dev->inflight_info) {
1578 dev->inflight_info = calloc(1,
1579 sizeof(struct inflight_mem_info));
1580 if (dev->inflight_info == NULL) {
1581 VHOST_LOG_CONFIG(ERR,
1582 "failed to alloc dev inflight area\n");
1583 return RTE_VHOST_MSG_RESULT_ERR;
1585 dev->inflight_info->fd = -1;
1588 if (dev->inflight_info->addr) {
1589 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1590 dev->inflight_info->addr = NULL;
1593 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
1595 if (addr == MAP_FAILED) {
1596 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
1597 return RTE_VHOST_MSG_RESULT_ERR;
1600 if (dev->inflight_info->fd >= 0) {
1601 close(dev->inflight_info->fd);
1602 dev->inflight_info->fd = -1;
1605 dev->inflight_info->fd = fd;
1606 dev->inflight_info->addr = addr;
1607 dev->inflight_info->size = mmap_size;
1609 for (i = 0; i < num_queues; i++) {
1610 vq = dev->virtqueue[i];
1611 if (vq_is_packed(dev)) {
1612 vq->inflight_packed = addr;
1613 vq->inflight_packed->desc_num = queue_size;
1615 vq->inflight_split = addr;
1616 vq->inflight_split->desc_num = queue_size;
1618 addr = (void *)((char *)addr + pervq_inflight_size);
1621 return RTE_VHOST_MSG_RESULT_OK;
1625 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1626 int main_fd __rte_unused)
1628 struct virtio_net *dev = *pdev;
1629 struct vhost_vring_file file;
1630 struct vhost_virtqueue *vq;
1633 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1634 if (validate_msg_fds(msg, expected_fds) != 0)
1635 return RTE_VHOST_MSG_RESULT_ERR;
1637 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1638 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1639 file.fd = VIRTIO_INVALID_EVENTFD;
1641 file.fd = msg->fds[0];
1642 VHOST_LOG_CONFIG(INFO,
1643 "vring call idx:%d file:%d\n", file.index, file.fd);
1645 vq = dev->virtqueue[file.index];
1649 vhost_user_notify_queue_state(dev, file.index, 0);
1652 if (vq->callfd >= 0)
1655 vq->callfd = file.fd;
1657 return RTE_VHOST_MSG_RESULT_OK;
1660 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1661 struct VhostUserMsg *msg,
1662 int main_fd __rte_unused)
1666 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1667 if (validate_msg_fds(msg, expected_fds) != 0)
1668 return RTE_VHOST_MSG_RESULT_ERR;
1670 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1672 VHOST_LOG_CONFIG(INFO, "not implemented\n");
1674 return RTE_VHOST_MSG_RESULT_OK;
1678 resubmit_desc_compare(const void *a, const void *b)
1680 const struct rte_vhost_resubmit_desc *desc0 = a;
1681 const struct rte_vhost_resubmit_desc *desc1 = b;
1683 if (desc1->counter > desc0->counter)
1690 vhost_check_queue_inflights_split(struct virtio_net *dev,
1691 struct vhost_virtqueue *vq)
1694 uint16_t resubmit_num = 0, last_io, num;
1695 struct vring_used *used = vq->used;
1696 struct rte_vhost_resubmit_info *resubmit;
1697 struct rte_vhost_inflight_info_split *inflight_split;
1699 if (!(dev->protocol_features &
1700 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1701 return RTE_VHOST_MSG_RESULT_OK;
1703 /* The frontend may still not support the inflight feature
1704 * although we negotiate the protocol feature.
1706 if ((!vq->inflight_split))
1707 return RTE_VHOST_MSG_RESULT_OK;
1709 if (!vq->inflight_split->version) {
1710 vq->inflight_split->version = INFLIGHT_VERSION;
1711 return RTE_VHOST_MSG_RESULT_OK;
1714 if (vq->resubmit_inflight)
1715 return RTE_VHOST_MSG_RESULT_OK;
1717 inflight_split = vq->inflight_split;
1718 vq->global_counter = 0;
1719 last_io = inflight_split->last_inflight_io;
1721 if (inflight_split->used_idx != used->idx) {
1722 inflight_split->desc[last_io].inflight = 0;
1724 inflight_split->used_idx = used->idx;
1727 for (i = 0; i < inflight_split->desc_num; i++) {
1728 if (inflight_split->desc[i].inflight == 1)
1732 vq->last_avail_idx += resubmit_num;
1735 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1737 VHOST_LOG_CONFIG(ERR,
1738 "failed to allocate memory for resubmit info.\n");
1739 return RTE_VHOST_MSG_RESULT_ERR;
1742 resubmit->resubmit_list = calloc(resubmit_num,
1743 sizeof(struct rte_vhost_resubmit_desc));
1744 if (!resubmit->resubmit_list) {
1745 VHOST_LOG_CONFIG(ERR,
1746 "failed to allocate memory for inflight desc.\n");
1748 return RTE_VHOST_MSG_RESULT_ERR;
1752 for (i = 0; i < vq->inflight_split->desc_num; i++) {
1753 if (vq->inflight_split->desc[i].inflight == 1) {
1754 resubmit->resubmit_list[num].index = i;
1755 resubmit->resubmit_list[num].counter =
1756 inflight_split->desc[i].counter;
1760 resubmit->resubmit_num = num;
1762 if (resubmit->resubmit_num > 1)
1763 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1764 sizeof(struct rte_vhost_resubmit_desc),
1765 resubmit_desc_compare);
1767 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1768 vq->resubmit_inflight = resubmit;
1771 return RTE_VHOST_MSG_RESULT_OK;
1775 vhost_check_queue_inflights_packed(struct virtio_net *dev,
1776 struct vhost_virtqueue *vq)
1779 uint16_t resubmit_num = 0, old_used_idx, num;
1780 struct rte_vhost_resubmit_info *resubmit;
1781 struct rte_vhost_inflight_info_packed *inflight_packed;
1783 if (!(dev->protocol_features &
1784 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1785 return RTE_VHOST_MSG_RESULT_OK;
1787 /* The frontend may still not support the inflight feature
1788 * although we negotiate the protocol feature.
1790 if ((!vq->inflight_packed))
1791 return RTE_VHOST_MSG_RESULT_OK;
1793 if (!vq->inflight_packed->version) {
1794 vq->inflight_packed->version = INFLIGHT_VERSION;
1795 return RTE_VHOST_MSG_RESULT_OK;
1798 if (vq->resubmit_inflight)
1799 return RTE_VHOST_MSG_RESULT_OK;
1801 inflight_packed = vq->inflight_packed;
1802 vq->global_counter = 0;
1803 old_used_idx = inflight_packed->old_used_idx;
1805 if (inflight_packed->used_idx != old_used_idx) {
1806 if (inflight_packed->desc[old_used_idx].inflight == 0) {
1807 inflight_packed->old_used_idx =
1808 inflight_packed->used_idx;
1809 inflight_packed->old_used_wrap_counter =
1810 inflight_packed->used_wrap_counter;
1811 inflight_packed->old_free_head =
1812 inflight_packed->free_head;
1814 inflight_packed->used_idx =
1815 inflight_packed->old_used_idx;
1816 inflight_packed->used_wrap_counter =
1817 inflight_packed->old_used_wrap_counter;
1818 inflight_packed->free_head =
1819 inflight_packed->old_free_head;
1823 for (i = 0; i < inflight_packed->desc_num; i++) {
1824 if (inflight_packed->desc[i].inflight == 1)
1829 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1830 if (resubmit == NULL) {
1831 VHOST_LOG_CONFIG(ERR,
1832 "failed to allocate memory for resubmit info.\n");
1833 return RTE_VHOST_MSG_RESULT_ERR;
1836 resubmit->resubmit_list = calloc(resubmit_num,
1837 sizeof(struct rte_vhost_resubmit_desc));
1838 if (resubmit->resubmit_list == NULL) {
1839 VHOST_LOG_CONFIG(ERR,
1840 "failed to allocate memory for resubmit desc.\n");
1842 return RTE_VHOST_MSG_RESULT_ERR;
1846 for (i = 0; i < inflight_packed->desc_num; i++) {
1847 if (vq->inflight_packed->desc[i].inflight == 1) {
1848 resubmit->resubmit_list[num].index = i;
1849 resubmit->resubmit_list[num].counter =
1850 inflight_packed->desc[i].counter;
1854 resubmit->resubmit_num = num;
1856 if (resubmit->resubmit_num > 1)
1857 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1858 sizeof(struct rte_vhost_resubmit_desc),
1859 resubmit_desc_compare);
1861 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1862 vq->resubmit_inflight = resubmit;
1865 return RTE_VHOST_MSG_RESULT_OK;
1869 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1870 int main_fd __rte_unused)
1872 struct virtio_net *dev = *pdev;
1873 struct vhost_vring_file file;
1874 struct vhost_virtqueue *vq;
1877 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1878 if (validate_msg_fds(msg, expected_fds) != 0)
1879 return RTE_VHOST_MSG_RESULT_ERR;
1881 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1882 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1883 file.fd = VIRTIO_INVALID_EVENTFD;
1885 file.fd = msg->fds[0];
1886 VHOST_LOG_CONFIG(INFO,
1887 "vring kick idx:%d file:%d\n", file.index, file.fd);
1889 /* Interpret ring addresses only when ring is started. */
1890 dev = translate_ring_addresses(dev, file.index);
1892 return RTE_VHOST_MSG_RESULT_ERR;
1896 vq = dev->virtqueue[file.index];
1899 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1900 * the ring starts already enabled. Otherwise, it is enabled via
1901 * the SET_VRING_ENABLE message.
1903 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1905 if (dev->notify_ops->vring_state_changed)
1906 dev->notify_ops->vring_state_changed(
1907 dev->vid, file.index, 1);
1912 vhost_user_notify_queue_state(dev, file.index, 0);
1915 if (vq->kickfd >= 0)
1917 vq->kickfd = file.fd;
1919 if (vq_is_packed(dev)) {
1920 if (vhost_check_queue_inflights_packed(dev, vq)) {
1921 VHOST_LOG_CONFIG(ERR,
1922 "failed to inflights for vq: %d\n", file.index);
1923 return RTE_VHOST_MSG_RESULT_ERR;
1926 if (vhost_check_queue_inflights_split(dev, vq)) {
1927 VHOST_LOG_CONFIG(ERR,
1928 "failed to inflights for vq: %d\n", file.index);
1929 return RTE_VHOST_MSG_RESULT_ERR;
1933 return RTE_VHOST_MSG_RESULT_OK;
1937 free_zmbufs(struct vhost_virtqueue *vq)
1939 drain_zmbuf_list(vq);
1941 rte_free(vq->zmbufs);
1946 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1949 vhost_user_get_vring_base(struct virtio_net **pdev,
1950 struct VhostUserMsg *msg,
1951 int main_fd __rte_unused)
1953 struct virtio_net *dev = *pdev;
1954 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1957 if (validate_msg_fds(msg, 0) != 0)
1958 return RTE_VHOST_MSG_RESULT_ERR;
1960 /* We have to stop the queue (virtio) if it is running. */
1961 vhost_destroy_device_notify(dev);
1963 dev->flags &= ~VIRTIO_DEV_READY;
1964 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1966 /* Here we are safe to get the indexes */
1967 if (vq_is_packed(dev)) {
1969 * Bit[0:14]: avail index
1970 * Bit[15]: avail wrap counter
1972 val = vq->last_avail_idx & 0x7fff;
1973 val |= vq->avail_wrap_counter << 15;
1974 msg->payload.state.num = val;
1976 msg->payload.state.num = vq->last_avail_idx;
1979 VHOST_LOG_CONFIG(INFO,
1980 "vring base idx:%d file:%d\n", msg->payload.state.index,
1981 msg->payload.state.num);
1983 * Based on current qemu vhost-user implementation, this message is
1984 * sent and only sent in vhost_vring_stop.
1985 * TODO: cleanup the vring, it isn't usable since here.
1987 if (vq->kickfd >= 0)
1990 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
1992 if (vq->callfd >= 0)
1995 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
1997 vq->signalled_used_valid = false;
1999 if (dev->dequeue_zero_copy)
2001 if (vq_is_packed(dev)) {
2002 rte_free(vq->shadow_used_packed);
2003 vq->shadow_used_packed = NULL;
2005 rte_free(vq->shadow_used_split);
2006 vq->shadow_used_split = NULL;
2007 if (vq->async_pkts_pending)
2008 rte_free(vq->async_pkts_pending);
2009 if (vq->async_pending_info)
2010 rte_free(vq->async_pending_info);
2011 vq->async_pkts_pending = NULL;
2012 vq->async_pending_info = NULL;
2015 rte_free(vq->batch_copy_elems);
2016 vq->batch_copy_elems = NULL;
2018 msg->size = sizeof(msg->payload.state);
2021 vring_invalidate(dev, vq);
2023 return RTE_VHOST_MSG_RESULT_REPLY;
2027 * when virtio queues are ready to work, qemu will send us to
2028 * enable the virtio queue pair.
2031 vhost_user_set_vring_enable(struct virtio_net **pdev,
2032 struct VhostUserMsg *msg,
2033 int main_fd __rte_unused)
2035 struct virtio_net *dev = *pdev;
2036 int enable = (int)msg->payload.state.num;
2037 int index = (int)msg->payload.state.index;
2039 if (validate_msg_fds(msg, 0) != 0)
2040 return RTE_VHOST_MSG_RESULT_ERR;
2042 VHOST_LOG_CONFIG(INFO,
2043 "set queue enable: %d to qp idx: %d\n",
2046 if (!enable && dev->virtqueue[index]->async_registered) {
2047 if (dev->virtqueue[index]->async_pkts_inflight_n) {
2048 VHOST_LOG_CONFIG(ERR, "failed to disable vring. "
2049 "async inflight packets must be completed first\n");
2050 return RTE_VHOST_MSG_RESULT_ERR;
2054 /* On disable, rings have to be stopped being processed. */
2055 if (!enable && dev->dequeue_zero_copy)
2056 drain_zmbuf_list(dev->virtqueue[index]);
2058 dev->virtqueue[index]->enabled = enable;
2060 return RTE_VHOST_MSG_RESULT_OK;
2064 vhost_user_get_protocol_features(struct virtio_net **pdev,
2065 struct VhostUserMsg *msg,
2066 int main_fd __rte_unused)
2068 struct virtio_net *dev = *pdev;
2069 uint64_t features, protocol_features;
2071 if (validate_msg_fds(msg, 0) != 0)
2072 return RTE_VHOST_MSG_RESULT_ERR;
2074 rte_vhost_driver_get_features(dev->ifname, &features);
2075 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
2077 msg->payload.u64 = protocol_features;
2078 msg->size = sizeof(msg->payload.u64);
2081 return RTE_VHOST_MSG_RESULT_REPLY;
2085 vhost_user_set_protocol_features(struct virtio_net **pdev,
2086 struct VhostUserMsg *msg,
2087 int main_fd __rte_unused)
2089 struct virtio_net *dev = *pdev;
2090 uint64_t protocol_features = msg->payload.u64;
2091 uint64_t slave_protocol_features = 0;
2093 if (validate_msg_fds(msg, 0) != 0)
2094 return RTE_VHOST_MSG_RESULT_ERR;
2096 rte_vhost_driver_get_protocol_features(dev->ifname,
2097 &slave_protocol_features);
2098 if (protocol_features & ~slave_protocol_features) {
2099 VHOST_LOG_CONFIG(ERR,
2100 "(%d) received invalid protocol features.\n",
2102 return RTE_VHOST_MSG_RESULT_ERR;
2105 dev->protocol_features = protocol_features;
2106 VHOST_LOG_CONFIG(INFO,
2107 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
2108 dev->protocol_features);
2110 return RTE_VHOST_MSG_RESULT_OK;
2114 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
2115 int main_fd __rte_unused)
2117 struct virtio_net *dev = *pdev;
2118 int fd = msg->fds[0];
2122 if (validate_msg_fds(msg, 1) != 0)
2123 return RTE_VHOST_MSG_RESULT_ERR;
2126 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
2127 return RTE_VHOST_MSG_RESULT_ERR;
2130 if (msg->size != sizeof(VhostUserLog)) {
2131 VHOST_LOG_CONFIG(ERR,
2132 "invalid log base msg size: %"PRId32" != %d\n",
2133 msg->size, (int)sizeof(VhostUserLog));
2134 return RTE_VHOST_MSG_RESULT_ERR;
2137 size = msg->payload.log.mmap_size;
2138 off = msg->payload.log.mmap_offset;
2140 /* Check for mmap size and offset overflow. */
2142 VHOST_LOG_CONFIG(ERR,
2143 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
2145 return RTE_VHOST_MSG_RESULT_ERR;
2148 VHOST_LOG_CONFIG(INFO,
2149 "log mmap size: %"PRId64", offset: %"PRId64"\n",
2153 * mmap from 0 to workaround a hugepage mmap bug: mmap will
2154 * fail when offset is not page size aligned.
2156 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2158 if (addr == MAP_FAILED) {
2159 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
2160 return RTE_VHOST_MSG_RESULT_ERR;
2164 * Free previously mapped log memory on occasionally
2165 * multiple VHOST_USER_SET_LOG_BASE.
2167 if (dev->log_addr) {
2168 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
2170 dev->log_addr = (uint64_t)(uintptr_t)addr;
2171 dev->log_base = dev->log_addr + off;
2172 dev->log_size = size;
2175 * The spec is not clear about it (yet), but QEMU doesn't expect
2176 * any payload in the reply.
2181 return RTE_VHOST_MSG_RESULT_REPLY;
2184 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
2185 struct VhostUserMsg *msg,
2186 int main_fd __rte_unused)
2188 if (validate_msg_fds(msg, 1) != 0)
2189 return RTE_VHOST_MSG_RESULT_ERR;
2192 VHOST_LOG_CONFIG(INFO, "not implemented.\n");
2194 return RTE_VHOST_MSG_RESULT_OK;
2198 * An rarp packet is constructed and broadcasted to notify switches about
2199 * the new location of the migrated VM, so that packets from outside will
2200 * not be lost after migration.
2202 * However, we don't actually "send" a rarp packet here, instead, we set
2203 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
2206 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
2207 int main_fd __rte_unused)
2209 struct virtio_net *dev = *pdev;
2210 uint8_t *mac = (uint8_t *)&msg->payload.u64;
2211 struct rte_vdpa_device *vdpa_dev;
2213 if (validate_msg_fds(msg, 0) != 0)
2214 return RTE_VHOST_MSG_RESULT_ERR;
2216 VHOST_LOG_CONFIG(DEBUG,
2217 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
2218 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2219 memcpy(dev->mac.addr_bytes, mac, 6);
2222 * Set the flag to inject a RARP broadcast packet at
2223 * rte_vhost_dequeue_burst().
2225 * __ATOMIC_RELEASE ordering is for making sure the mac is
2226 * copied before the flag is set.
2228 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
2229 vdpa_dev = dev->vdpa_dev;
2230 if (vdpa_dev && vdpa_dev->ops->migration_done)
2231 vdpa_dev->ops->migration_done(dev->vid);
2233 return RTE_VHOST_MSG_RESULT_OK;
2237 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
2238 int main_fd __rte_unused)
2240 struct virtio_net *dev = *pdev;
2242 if (validate_msg_fds(msg, 0) != 0)
2243 return RTE_VHOST_MSG_RESULT_ERR;
2245 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
2246 msg->payload.u64 > VIRTIO_MAX_MTU) {
2247 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
2250 return RTE_VHOST_MSG_RESULT_ERR;
2253 dev->mtu = msg->payload.u64;
2255 return RTE_VHOST_MSG_RESULT_OK;
2259 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
2260 int main_fd __rte_unused)
2262 struct virtio_net *dev = *pdev;
2263 int fd = msg->fds[0];
2265 if (validate_msg_fds(msg, 1) != 0)
2266 return RTE_VHOST_MSG_RESULT_ERR;
2269 VHOST_LOG_CONFIG(ERR,
2270 "Invalid file descriptor for slave channel (%d)\n",
2272 return RTE_VHOST_MSG_RESULT_ERR;
2275 if (dev->slave_req_fd >= 0)
2276 close(dev->slave_req_fd);
2278 dev->slave_req_fd = fd;
2280 return RTE_VHOST_MSG_RESULT_OK;
2284 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2286 struct vhost_vring_addr *ra;
2287 uint64_t start, end, len;
2290 end = start + imsg->size;
2292 ra = &vq->ring_addrs;
2293 len = sizeof(struct vring_desc) * vq->size;
2294 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2297 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
2298 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2301 len = sizeof(struct vring_used) +
2302 sizeof(struct vring_used_elem) * vq->size;
2303 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2306 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2307 len = sizeof(uint64_t);
2308 if (ra->log_guest_addr < end &&
2309 (ra->log_guest_addr + len) > start)
2317 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2319 struct vhost_vring_addr *ra;
2320 uint64_t start, end, len;
2323 end = start + imsg->size;
2325 ra = &vq->ring_addrs;
2326 len = sizeof(struct vring_packed_desc) * vq->size;
2327 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2330 len = sizeof(struct vring_packed_desc_event);
2331 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2334 len = sizeof(struct vring_packed_desc_event);
2335 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2338 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2339 len = sizeof(uint64_t);
2340 if (ra->log_guest_addr < end &&
2341 (ra->log_guest_addr + len) > start)
2348 static int is_vring_iotlb(struct virtio_net *dev,
2349 struct vhost_virtqueue *vq,
2350 struct vhost_iotlb_msg *imsg)
2352 if (vq_is_packed(dev))
2353 return is_vring_iotlb_packed(vq, imsg);
2355 return is_vring_iotlb_split(vq, imsg);
2359 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
2360 int main_fd __rte_unused)
2362 struct virtio_net *dev = *pdev;
2363 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
2367 if (validate_msg_fds(msg, 0) != 0)
2368 return RTE_VHOST_MSG_RESULT_ERR;
2370 switch (imsg->type) {
2371 case VHOST_IOTLB_UPDATE:
2373 vva = qva_to_vva(dev, imsg->uaddr, &len);
2375 return RTE_VHOST_MSG_RESULT_ERR;
2377 for (i = 0; i < dev->nr_vring; i++) {
2378 struct vhost_virtqueue *vq = dev->virtqueue[i];
2380 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
2383 if (is_vring_iotlb(dev, vq, imsg))
2384 *pdev = dev = translate_ring_addresses(dev, i);
2387 case VHOST_IOTLB_INVALIDATE:
2388 for (i = 0; i < dev->nr_vring; i++) {
2389 struct vhost_virtqueue *vq = dev->virtqueue[i];
2391 vhost_user_iotlb_cache_remove(vq, imsg->iova,
2394 if (is_vring_iotlb(dev, vq, imsg))
2395 vring_invalidate(dev, vq);
2399 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
2401 return RTE_VHOST_MSG_RESULT_ERR;
2404 return RTE_VHOST_MSG_RESULT_OK;
2408 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
2409 struct VhostUserMsg *msg,
2410 int main_fd __rte_unused)
2412 struct virtio_net *dev = *pdev;
2413 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
2414 struct uffdio_api api_struct;
2416 if (validate_msg_fds(msg, 0) != 0)
2417 return RTE_VHOST_MSG_RESULT_ERR;
2419 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
2421 if (dev->postcopy_ufd == -1) {
2422 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
2424 return RTE_VHOST_MSG_RESULT_ERR;
2426 api_struct.api = UFFD_API;
2427 api_struct.features = 0;
2428 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
2429 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
2431 close(dev->postcopy_ufd);
2432 dev->postcopy_ufd = -1;
2433 return RTE_VHOST_MSG_RESULT_ERR;
2435 msg->fds[0] = dev->postcopy_ufd;
2438 return RTE_VHOST_MSG_RESULT_REPLY;
2440 dev->postcopy_ufd = -1;
2443 return RTE_VHOST_MSG_RESULT_ERR;
2448 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
2449 struct VhostUserMsg *msg __rte_unused,
2450 int main_fd __rte_unused)
2452 struct virtio_net *dev = *pdev;
2454 if (validate_msg_fds(msg, 0) != 0)
2455 return RTE_VHOST_MSG_RESULT_ERR;
2457 if (dev->mem && dev->mem->nregions) {
2458 VHOST_LOG_CONFIG(ERR,
2459 "Regions already registered at postcopy-listen\n");
2460 return RTE_VHOST_MSG_RESULT_ERR;
2462 dev->postcopy_listening = 1;
2464 return RTE_VHOST_MSG_RESULT_OK;
2468 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
2469 int main_fd __rte_unused)
2471 struct virtio_net *dev = *pdev;
2473 if (validate_msg_fds(msg, 0) != 0)
2474 return RTE_VHOST_MSG_RESULT_ERR;
2476 dev->postcopy_listening = 0;
2477 if (dev->postcopy_ufd >= 0) {
2478 close(dev->postcopy_ufd);
2479 dev->postcopy_ufd = -1;
2482 msg->payload.u64 = 0;
2483 msg->size = sizeof(msg->payload.u64);
2486 return RTE_VHOST_MSG_RESULT_REPLY;
2490 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2491 int main_fd __rte_unused)
2493 struct virtio_net *dev = *pdev;
2495 if (validate_msg_fds(msg, 0) != 0)
2496 return RTE_VHOST_MSG_RESULT_ERR;
2498 msg->payload.u64 = dev->status;
2499 msg->size = sizeof(msg->payload.u64);
2502 return RTE_VHOST_MSG_RESULT_REPLY;
2506 vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2507 int main_fd __rte_unused)
2509 struct virtio_net *dev = *pdev;
2511 if (validate_msg_fds(msg, 0) != 0)
2512 return RTE_VHOST_MSG_RESULT_ERR;
2514 /* As per Virtio specification, the device status is 8bits long */
2515 if (msg->payload.u64 > UINT8_MAX) {
2516 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
2518 return RTE_VHOST_MSG_RESULT_ERR;
2521 dev->status = msg->payload.u64;
2523 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
2524 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
2525 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
2527 * Clear the bit to let the driver know about the feature
2528 * negotiation failure
2530 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
2533 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
2534 "\t-ACKNOWLEDGE: %u\n"
2536 "\t-FEATURES_OK: %u\n"
2537 "\t-DRIVER_OK: %u\n"
2538 "\t-DEVICE_NEED_RESET: %u\n"
2541 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
2542 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
2543 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
2544 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
2545 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
2546 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
2548 return RTE_VHOST_MSG_RESULT_OK;
2551 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
2552 struct VhostUserMsg *msg,
2554 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
2555 [VHOST_USER_NONE] = NULL,
2556 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
2557 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
2558 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
2559 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
2560 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
2561 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
2562 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
2563 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
2564 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
2565 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
2566 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
2567 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
2568 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
2569 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
2570 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
2571 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
2572 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
2573 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
2574 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
2575 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
2576 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
2577 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
2578 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
2579 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
2580 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
2581 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
2582 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
2583 [VHOST_USER_SET_STATUS] = vhost_user_set_status,
2584 [VHOST_USER_GET_STATUS] = vhost_user_get_status,
2587 /* return bytes# of read on success or negative val on failure. */
2589 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
2593 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
2594 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
2597 } else if (ret != VHOST_USER_HDR_SIZE) {
2598 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
2604 if (msg->size > sizeof(msg->payload)) {
2605 VHOST_LOG_CONFIG(ERR,
2606 "invalid msg size: %d\n", msg->size);
2609 ret = read(sockfd, &msg->payload, msg->size);
2612 if (ret != (int)msg->size) {
2613 VHOST_LOG_CONFIG(ERR,
2614 "read control message failed\n");
2623 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
2628 return send_fd_message(sockfd, (char *)msg,
2629 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
2633 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
2638 msg->flags &= ~VHOST_USER_VERSION_MASK;
2639 msg->flags &= ~VHOST_USER_NEED_REPLY;
2640 msg->flags |= VHOST_USER_VERSION;
2641 msg->flags |= VHOST_USER_REPLY_MASK;
2643 return send_vhost_message(sockfd, msg);
2647 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
2651 if (msg->flags & VHOST_USER_NEED_REPLY)
2652 rte_spinlock_lock(&dev->slave_req_lock);
2654 ret = send_vhost_message(dev->slave_req_fd, msg);
2655 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
2656 rte_spinlock_unlock(&dev->slave_req_lock);
2662 * Allocate a queue pair if it hasn't been allocated yet
2665 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
2666 struct VhostUserMsg *msg)
2670 switch (msg->request.master) {
2671 case VHOST_USER_SET_VRING_KICK:
2672 case VHOST_USER_SET_VRING_CALL:
2673 case VHOST_USER_SET_VRING_ERR:
2674 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
2676 case VHOST_USER_SET_VRING_NUM:
2677 case VHOST_USER_SET_VRING_BASE:
2678 case VHOST_USER_SET_VRING_ENABLE:
2679 vring_idx = msg->payload.state.index;
2681 case VHOST_USER_SET_VRING_ADDR:
2682 vring_idx = msg->payload.addr.index;
2688 if (vring_idx >= VHOST_MAX_VRING) {
2689 VHOST_LOG_CONFIG(ERR,
2690 "invalid vring index: %u\n", vring_idx);
2694 if (dev->virtqueue[vring_idx])
2697 return alloc_vring_queue(dev, vring_idx);
2701 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
2704 unsigned int vq_num = 0;
2706 while (vq_num < dev->nr_vring) {
2707 struct vhost_virtqueue *vq = dev->virtqueue[i];
2710 rte_spinlock_lock(&vq->access_lock);
2718 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
2721 unsigned int vq_num = 0;
2723 while (vq_num < dev->nr_vring) {
2724 struct vhost_virtqueue *vq = dev->virtqueue[i];
2727 rte_spinlock_unlock(&vq->access_lock);
2735 vhost_user_msg_handler(int vid, int fd)
2737 struct virtio_net *dev;
2738 struct VhostUserMsg msg;
2739 struct rte_vdpa_device *vdpa_dev;
2741 int unlock_required = 0;
2746 dev = get_device(vid);
2750 if (!dev->notify_ops) {
2751 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2752 if (!dev->notify_ops) {
2753 VHOST_LOG_CONFIG(ERR,
2754 "failed to get callback ops for driver %s\n",
2760 ret = read_vhost_message(fd, &msg);
2763 VHOST_LOG_CONFIG(ERR,
2764 "vhost read message failed\n");
2766 VHOST_LOG_CONFIG(INFO,
2767 "vhost peer closed\n");
2773 request = msg.request.master;
2774 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2775 vhost_message_str[request]) {
2776 if (request != VHOST_USER_IOTLB_MSG)
2777 VHOST_LOG_CONFIG(INFO, "read message %s\n",
2778 vhost_message_str[request]);
2780 VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
2781 vhost_message_str[request]);
2783 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
2786 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2788 VHOST_LOG_CONFIG(ERR,
2789 "failed to alloc queue\n");
2794 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2795 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2796 * and device is destroyed. destroy_device waits for queues to be
2797 * inactive, so it is safe. Otherwise taking the access_lock
2798 * would cause a dead lock.
2801 case VHOST_USER_SET_FEATURES:
2802 case VHOST_USER_SET_PROTOCOL_FEATURES:
2803 case VHOST_USER_SET_OWNER:
2804 case VHOST_USER_SET_MEM_TABLE:
2805 case VHOST_USER_SET_LOG_BASE:
2806 case VHOST_USER_SET_LOG_FD:
2807 case VHOST_USER_SET_VRING_NUM:
2808 case VHOST_USER_SET_VRING_ADDR:
2809 case VHOST_USER_SET_VRING_BASE:
2810 case VHOST_USER_SET_VRING_KICK:
2811 case VHOST_USER_SET_VRING_CALL:
2812 case VHOST_USER_SET_VRING_ERR:
2813 case VHOST_USER_SET_VRING_ENABLE:
2814 case VHOST_USER_SEND_RARP:
2815 case VHOST_USER_NET_SET_MTU:
2816 case VHOST_USER_SET_SLAVE_REQ_FD:
2817 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2818 vhost_user_lock_all_queue_pairs(dev);
2819 unlock_required = 1;
2828 if (dev->extern_ops.pre_msg_handle) {
2829 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2832 case RTE_VHOST_MSG_RESULT_REPLY:
2833 send_vhost_reply(fd, &msg);
2835 case RTE_VHOST_MSG_RESULT_ERR:
2836 case RTE_VHOST_MSG_RESULT_OK:
2838 goto skip_to_post_handle;
2839 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2845 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2846 if (!vhost_message_handlers[request])
2847 goto skip_to_post_handle;
2848 ret = vhost_message_handlers[request](&dev, &msg, fd);
2851 case RTE_VHOST_MSG_RESULT_ERR:
2852 VHOST_LOG_CONFIG(ERR,
2853 "Processing %s failed.\n",
2854 vhost_message_str[request]);
2857 case RTE_VHOST_MSG_RESULT_OK:
2858 VHOST_LOG_CONFIG(DEBUG,
2859 "Processing %s succeeded.\n",
2860 vhost_message_str[request]);
2863 case RTE_VHOST_MSG_RESULT_REPLY:
2864 VHOST_LOG_CONFIG(DEBUG,
2865 "Processing %s succeeded and needs reply.\n",
2866 vhost_message_str[request]);
2867 send_vhost_reply(fd, &msg);
2875 skip_to_post_handle:
2876 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2877 dev->extern_ops.post_msg_handle) {
2878 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2881 case RTE_VHOST_MSG_RESULT_REPLY:
2882 send_vhost_reply(fd, &msg);
2884 case RTE_VHOST_MSG_RESULT_ERR:
2885 case RTE_VHOST_MSG_RESULT_OK:
2887 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2893 if (unlock_required)
2894 vhost_user_unlock_all_queue_pairs(dev);
2896 /* If message was not handled at this stage, treat it as an error */
2898 VHOST_LOG_CONFIG(ERR,
2899 "vhost message (req: %d) was not handled.\n", request);
2900 close_msg_fds(&msg);
2901 ret = RTE_VHOST_MSG_RESULT_ERR;
2905 * If the request required a reply that was already sent,
2906 * this optional reply-ack won't be sent as the
2907 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2909 if (msg.flags & VHOST_USER_NEED_REPLY) {
2910 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2911 msg.size = sizeof(msg.payload.u64);
2913 send_vhost_reply(fd, &msg);
2914 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2915 VHOST_LOG_CONFIG(ERR,
2916 "vhost message handling failed.\n");
2920 for (i = 0; i < dev->nr_vring; i++) {
2921 struct vhost_virtqueue *vq = dev->virtqueue[i];
2922 bool cur_ready = vq_is_ready(dev, vq);
2924 if (cur_ready != (vq && vq->ready)) {
2925 vq->ready = cur_ready;
2926 vhost_user_notify_queue_state(dev, i, cur_ready);
2931 if (!virtio_is_ready(dev))
2935 * Virtio is now ready. If not done already, it is time
2936 * to notify the application it can process the rings and
2937 * configure the vDPA device if present.
2940 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
2941 if (dev->notify_ops->new_device(dev->vid) == 0)
2942 dev->flags |= VIRTIO_DEV_RUNNING;
2945 vdpa_dev = dev->vdpa_dev;
2949 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2950 if (vdpa_dev->ops->dev_conf(dev->vid))
2951 VHOST_LOG_CONFIG(ERR,
2952 "Failed to configure vDPA device\n");
2954 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
2961 static int process_slave_message_reply(struct virtio_net *dev,
2962 const struct VhostUserMsg *msg)
2964 struct VhostUserMsg msg_reply;
2967 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
2970 ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
2973 VHOST_LOG_CONFIG(ERR,
2974 "vhost read slave message reply failed\n");
2976 VHOST_LOG_CONFIG(INFO,
2977 "vhost peer closed\n");
2983 if (msg_reply.request.slave != msg->request.slave) {
2984 VHOST_LOG_CONFIG(ERR,
2985 "Received unexpected msg type (%u), expected %u\n",
2986 msg_reply.request.slave, msg->request.slave);
2991 ret = msg_reply.payload.u64 ? -1 : 0;
2994 rte_spinlock_unlock(&dev->slave_req_lock);
2999 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
3002 struct VhostUserMsg msg = {
3003 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
3004 .flags = VHOST_USER_VERSION,
3005 .size = sizeof(msg.payload.iotlb),
3009 .type = VHOST_IOTLB_MISS,
3013 ret = send_vhost_message(dev->slave_req_fd, &msg);
3015 VHOST_LOG_CONFIG(ERR,
3016 "Failed to send IOTLB miss message (%d)\n",
3025 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
3028 struct VhostUserMsg msg = {
3029 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
3030 .flags = VHOST_USER_VERSION,
3035 msg.flags |= VHOST_USER_NEED_REPLY;
3037 ret = send_vhost_slave_message(dev, &msg);
3039 VHOST_LOG_CONFIG(ERR,
3040 "Failed to send config change (%d)\n",
3045 return process_slave_message_reply(dev, &msg);
3049 rte_vhost_slave_config_change(int vid, bool need_reply)
3051 struct virtio_net *dev;
3053 dev = get_device(vid);
3057 return vhost_user_slave_config_change(dev, need_reply);
3060 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
3066 struct VhostUserMsg msg = {
3067 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
3068 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
3069 .size = sizeof(msg.payload.area),
3071 .u64 = index & VHOST_USER_VRING_IDX_MASK,
3078 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
3084 ret = send_vhost_slave_message(dev, &msg);
3086 VHOST_LOG_CONFIG(ERR,
3087 "Failed to set host notifier (%d)\n", ret);
3091 return process_slave_message_reply(dev, &msg);
3094 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
3096 struct virtio_net *dev;
3097 struct rte_vdpa_device *vdpa_dev;
3098 int vfio_device_fd, ret = 0;
3099 uint64_t offset, size;
3100 unsigned int i, q_start, q_last;
3102 dev = get_device(vid);
3106 vdpa_dev = dev->vdpa_dev;
3107 if (vdpa_dev == NULL)
3110 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
3111 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
3112 !(dev->protocol_features &
3113 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
3114 !(dev->protocol_features &
3115 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
3116 !(dev->protocol_features &
3117 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
3120 if (qid == RTE_VHOST_QUEUE_ALL) {
3122 q_last = dev->nr_vring - 1;
3124 if (qid >= dev->nr_vring)
3130 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
3131 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
3133 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
3134 if (vfio_device_fd < 0)
3138 for (i = q_start; i <= q_last; i++) {
3139 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
3145 if (vhost_user_slave_set_vring_host_notifier(dev, i,
3146 vfio_device_fd, offset, size) < 0) {
3153 for (i = q_start; i <= q_last; i++) {
3154 vhost_user_slave_set_vring_host_notifier(dev, i, -1,