1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
7 * The vhost-user protocol connection is an external interface, so it must be
8 * robust against invalid inputs.
10 * This is important because the vhost-user master is only one step removed
11 * from the guest. Malicious guests that have escaped will then launch further
12 * attacks from the vhost-user master.
14 * Even in deployments where guests are trusted, a bug in the vhost-user master
15 * can still cause invalid messages to be sent. Such messages must not
16 * compromise the stability of the DPDK application by causing crashes, memory
17 * corruption, or other problematic behavior.
19 * Do not assume received VhostUserMsg fields contain sensible values!
28 #include <sys/ioctl.h>
30 #include <sys/types.h>
32 #include <sys/syscall.h>
34 #ifdef RTE_LIBRTE_VHOST_NUMA
37 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
38 #include <linux/userfaultfd.h>
40 #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */
41 #include <linux/memfd.h>
42 #define MEMFD_SUPPORTED
45 #include <rte_common.h>
46 #include <rte_malloc.h>
51 #include "vhost_user.h"
53 #define VIRTIO_MIN_MTU 68
54 #define VIRTIO_MAX_MTU 65535
56 #define INFLIGHT_ALIGNMENT 64
57 #define INFLIGHT_VERSION 0x1
59 static const char *vhost_message_str[VHOST_USER_MAX] = {
60 [VHOST_USER_NONE] = "VHOST_USER_NONE",
61 [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
62 [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
63 [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
64 [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
65 [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
66 [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
67 [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
68 [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
69 [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
70 [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
71 [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
72 [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
73 [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
74 [VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR",
75 [VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES",
76 [VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES",
77 [VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
78 [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
79 [VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
80 [VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
81 [VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
82 [VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
83 [VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
84 [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
85 [VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
86 [VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
87 [VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
88 [VHOST_USER_GET_INFLIGHT_FD] = "VHOST_USER_GET_INFLIGHT_FD",
89 [VHOST_USER_SET_INFLIGHT_FD] = "VHOST_USER_SET_INFLIGHT_FD",
90 [VHOST_USER_SET_STATUS] = "VHOST_USER_SET_STATUS",
91 [VHOST_USER_GET_STATUS] = "VHOST_USER_GET_STATUS",
94 static int send_vhost_reply(int sockfd, struct VhostUserMsg *msg);
95 static int read_vhost_message(int sockfd, struct VhostUserMsg *msg);
98 close_msg_fds(struct VhostUserMsg *msg)
102 for (i = 0; i < msg->fd_num; i++) {
103 int fd = msg->fds[i];
114 * Ensure the expected number of FDs is received,
115 * close all FDs and return an error if this is not the case.
118 validate_msg_fds(struct VhostUserMsg *msg, int expected_fds)
120 if (msg->fd_num == expected_fds)
123 VHOST_LOG_CONFIG(ERR,
124 " Expect %d FDs for request %s, received %d\n",
126 vhost_message_str[msg->request.master],
140 ret = fstat(fd, &stat);
141 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
145 free_mem_region(struct virtio_net *dev)
148 struct rte_vhost_mem_region *reg;
150 if (!dev || !dev->mem)
153 for (i = 0; i < dev->mem->nregions; i++) {
154 reg = &dev->mem->regions[i];
155 if (reg->host_user_addr) {
156 munmap(reg->mmap_addr, reg->mmap_size);
163 vhost_backend_cleanup(struct virtio_net *dev)
166 free_mem_region(dev);
171 rte_free(dev->guest_pages);
172 dev->guest_pages = NULL;
175 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
179 if (dev->inflight_info) {
180 if (dev->inflight_info->addr) {
181 munmap(dev->inflight_info->addr,
182 dev->inflight_info->size);
183 dev->inflight_info->addr = NULL;
186 if (dev->inflight_info->fd >= 0) {
187 close(dev->inflight_info->fd);
188 dev->inflight_info->fd = -1;
191 free(dev->inflight_info);
192 dev->inflight_info = NULL;
195 if (dev->slave_req_fd >= 0) {
196 close(dev->slave_req_fd);
197 dev->slave_req_fd = -1;
200 if (dev->postcopy_ufd >= 0) {
201 close(dev->postcopy_ufd);
202 dev->postcopy_ufd = -1;
205 dev->postcopy_listening = 0;
209 vhost_user_notify_queue_state(struct virtio_net *dev, uint16_t index,
212 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
213 struct vhost_virtqueue *vq = dev->virtqueue[index];
215 /* Configure guest notifications on enable */
216 if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF)
217 vhost_enable_guest_notification(dev, vq, vq->notif_enable);
219 if (vdpa_dev && vdpa_dev->ops->set_vring_state)
220 vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
222 if (dev->notify_ops->vring_state_changed)
223 dev->notify_ops->vring_state_changed(dev->vid,
228 * This function just returns success at the moment unless
229 * the device hasn't been initialised.
232 vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
233 struct VhostUserMsg *msg,
234 int main_fd __rte_unused)
236 if (validate_msg_fds(msg, 0) != 0)
237 return RTE_VHOST_MSG_RESULT_ERR;
239 return RTE_VHOST_MSG_RESULT_OK;
243 vhost_user_reset_owner(struct virtio_net **pdev,
244 struct VhostUserMsg *msg,
245 int main_fd __rte_unused)
247 struct virtio_net *dev = *pdev;
249 if (validate_msg_fds(msg, 0) != 0)
250 return RTE_VHOST_MSG_RESULT_ERR;
252 vhost_destroy_device_notify(dev);
254 cleanup_device(dev, 0);
256 return RTE_VHOST_MSG_RESULT_OK;
260 * The features that we support are requested.
263 vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
264 int main_fd __rte_unused)
266 struct virtio_net *dev = *pdev;
267 uint64_t features = 0;
269 if (validate_msg_fds(msg, 0) != 0)
270 return RTE_VHOST_MSG_RESULT_ERR;
272 rte_vhost_driver_get_features(dev->ifname, &features);
274 msg->payload.u64 = features;
275 msg->size = sizeof(msg->payload.u64);
278 return RTE_VHOST_MSG_RESULT_REPLY;
282 * The queue number that we support are requested.
285 vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
286 int main_fd __rte_unused)
288 struct virtio_net *dev = *pdev;
289 uint32_t queue_num = 0;
291 if (validate_msg_fds(msg, 0) != 0)
292 return RTE_VHOST_MSG_RESULT_ERR;
294 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
296 msg->payload.u64 = (uint64_t)queue_num;
297 msg->size = sizeof(msg->payload.u64);
300 return RTE_VHOST_MSG_RESULT_REPLY;
304 * We receive the negotiated features supported by us and the virtio device.
307 vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
308 int main_fd __rte_unused)
310 struct virtio_net *dev = *pdev;
311 uint64_t features = msg->payload.u64;
312 uint64_t vhost_features = 0;
313 struct rte_vdpa_device *vdpa_dev;
315 if (validate_msg_fds(msg, 0) != 0)
316 return RTE_VHOST_MSG_RESULT_ERR;
318 rte_vhost_driver_get_features(dev->ifname, &vhost_features);
319 if (features & ~vhost_features) {
320 VHOST_LOG_CONFIG(ERR,
321 "(%d) received invalid negotiated features.\n",
323 dev->flags |= VIRTIO_DEV_FEATURES_FAILED;
324 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
326 return RTE_VHOST_MSG_RESULT_ERR;
329 if (dev->flags & VIRTIO_DEV_RUNNING) {
330 if (dev->features == features)
331 return RTE_VHOST_MSG_RESULT_OK;
334 * Error out if master tries to change features while device is
335 * in running state. The exception being VHOST_F_LOG_ALL, which
336 * is enabled when the live-migration starts.
338 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
339 VHOST_LOG_CONFIG(ERR,
340 "(%d) features changed while device is running.\n",
342 return RTE_VHOST_MSG_RESULT_ERR;
345 if (dev->notify_ops->features_changed)
346 dev->notify_ops->features_changed(dev->vid, features);
349 dev->features = features;
351 ((1ULL << VIRTIO_NET_F_MRG_RXBUF) |
352 (1ULL << VIRTIO_F_VERSION_1) |
353 (1ULL << VIRTIO_F_RING_PACKED))) {
354 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
356 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
358 VHOST_LOG_CONFIG(INFO,
359 "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
360 VHOST_LOG_CONFIG(DEBUG,
361 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
363 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
364 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
366 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
367 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
369 * Remove all but first queue pair if MQ hasn't been
370 * negotiated. This is safe because the device is not
371 * running at this stage.
373 while (dev->nr_vring > 2) {
374 struct vhost_virtqueue *vq;
376 vq = dev->virtqueue[--dev->nr_vring];
380 dev->virtqueue[dev->nr_vring] = NULL;
382 cleanup_vq_inflight(dev, vq);
387 vdpa_dev = dev->vdpa_dev;
389 vdpa_dev->ops->set_features(dev->vid);
391 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED;
392 return RTE_VHOST_MSG_RESULT_OK;
396 * The virtio device sends us the size of the descriptor ring.
399 vhost_user_set_vring_num(struct virtio_net **pdev,
400 struct VhostUserMsg *msg,
401 int main_fd __rte_unused)
403 struct virtio_net *dev = *pdev;
404 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
406 if (validate_msg_fds(msg, 0) != 0)
407 return RTE_VHOST_MSG_RESULT_ERR;
409 if (msg->payload.state.num > 32768) {
410 VHOST_LOG_CONFIG(ERR, "invalid virtqueue size %u\n", msg->payload.state.num);
411 return RTE_VHOST_MSG_RESULT_ERR;
414 vq->size = msg->payload.state.num;
416 /* VIRTIO 1.0, 2.4 Virtqueues says:
418 * Queue Size value is always a power of 2. The maximum Queue Size
421 * VIRTIO 1.1 2.7 Virtqueues says:
423 * Packed virtqueues support up to 2^15 entries each.
425 if (!vq_is_packed(dev)) {
426 if (vq->size & (vq->size - 1)) {
427 VHOST_LOG_CONFIG(ERR,
428 "invalid virtqueue size %u\n", vq->size);
429 return RTE_VHOST_MSG_RESULT_ERR;
433 if (vq_is_packed(dev)) {
434 if (vq->shadow_used_packed)
435 rte_free(vq->shadow_used_packed);
436 vq->shadow_used_packed = rte_malloc_socket(NULL,
438 sizeof(struct vring_used_elem_packed),
439 RTE_CACHE_LINE_SIZE, vq->numa_node);
440 if (!vq->shadow_used_packed) {
441 VHOST_LOG_CONFIG(ERR,
442 "failed to allocate memory for shadow used ring.\n");
443 return RTE_VHOST_MSG_RESULT_ERR;
447 if (vq->shadow_used_split)
448 rte_free(vq->shadow_used_split);
450 vq->shadow_used_split = rte_malloc_socket(NULL,
451 vq->size * sizeof(struct vring_used_elem),
452 RTE_CACHE_LINE_SIZE, vq->numa_node);
454 if (!vq->shadow_used_split) {
455 VHOST_LOG_CONFIG(ERR,
456 "failed to allocate memory for vq internal data.\n");
457 return RTE_VHOST_MSG_RESULT_ERR;
461 if (vq->batch_copy_elems)
462 rte_free(vq->batch_copy_elems);
463 vq->batch_copy_elems = rte_malloc_socket(NULL,
464 vq->size * sizeof(struct batch_copy_elem),
465 RTE_CACHE_LINE_SIZE, vq->numa_node);
466 if (!vq->batch_copy_elems) {
467 VHOST_LOG_CONFIG(ERR,
468 "failed to allocate memory for batching copy.\n");
469 return RTE_VHOST_MSG_RESULT_ERR;
472 return RTE_VHOST_MSG_RESULT_OK;
476 * Reallocate virtio_dev, vhost_virtqueue and related data structures to
477 * make them on the same numa node as the memory of vring descriptor.
479 #ifdef RTE_LIBRTE_VHOST_NUMA
480 static struct virtio_net*
481 numa_realloc(struct virtio_net *dev, int index)
484 struct virtio_net *old_dev;
485 struct vhost_virtqueue *vq;
486 struct batch_copy_elem *bce;
487 struct guest_page *gp;
488 struct rte_vhost_memory *mem;
493 vq = dev->virtqueue[index];
496 * If VQ is ready, it is too late to reallocate, it certainly already
497 * happened anyway on VHOST_USER_SET_VRING_ADRR.
502 ret = get_mempolicy(&node, NULL, 0, vq->desc, MPOL_F_NODE | MPOL_F_ADDR);
504 VHOST_LOG_CONFIG(ERR, "Unable to get virtqueue %d numa information.\n", index);
508 if (node == vq->numa_node)
509 goto out_dev_realloc;
511 vq = rte_realloc_socket(vq, sizeof(*vq), 0, node);
513 VHOST_LOG_CONFIG(ERR, "Failed to realloc virtqueue %d on node %d\n",
518 if (vq != dev->virtqueue[index]) {
519 VHOST_LOG_CONFIG(INFO, "reallocated virtqueue on node %d\n", node);
520 dev->virtqueue[index] = vq;
521 vhost_user_iotlb_init(dev, index);
524 if (vq_is_packed(dev)) {
525 struct vring_used_elem_packed *sup;
527 sup = rte_realloc_socket(vq->shadow_used_packed, vq->size * sizeof(*sup),
528 RTE_CACHE_LINE_SIZE, node);
530 VHOST_LOG_CONFIG(ERR, "Failed to realloc shadow packed on node %d\n", node);
533 vq->shadow_used_packed = sup;
535 struct vring_used_elem *sus;
537 sus = rte_realloc_socket(vq->shadow_used_split, vq->size * sizeof(*sus),
538 RTE_CACHE_LINE_SIZE, node);
540 VHOST_LOG_CONFIG(ERR, "Failed to realloc shadow split on node %d\n", node);
543 vq->shadow_used_split = sus;
546 bce = rte_realloc_socket(vq->batch_copy_elems, vq->size * sizeof(*bce),
547 RTE_CACHE_LINE_SIZE, node);
549 VHOST_LOG_CONFIG(ERR, "Failed to realloc batch copy elem on node %d\n", node);
552 vq->batch_copy_elems = bce;
555 struct log_cache_entry *lc;
557 lc = rte_realloc_socket(vq->log_cache, sizeof(*lc) * VHOST_LOG_CACHE_NR, 0, node);
559 VHOST_LOG_CONFIG(ERR, "Failed to realloc log cache on node %d\n", node);
565 vq->numa_node = node;
569 if (dev->flags & VIRTIO_DEV_RUNNING)
572 ret = get_mempolicy(&dev_node, NULL, 0, dev, MPOL_F_NODE | MPOL_F_ADDR);
574 VHOST_LOG_CONFIG(ERR, "Unable to get Virtio dev %d numa information.\n", dev->vid);
578 if (dev_node == node)
581 dev = rte_realloc_socket(old_dev, sizeof(*dev), 0, node);
583 VHOST_LOG_CONFIG(ERR, "Failed to realloc dev on node %d\n", node);
587 VHOST_LOG_CONFIG(INFO, "reallocated device on node %d\n", node);
588 vhost_devices[dev->vid] = dev;
590 mem_size = sizeof(struct rte_vhost_memory) +
591 sizeof(struct rte_vhost_mem_region) * dev->mem->nregions;
592 mem = rte_realloc_socket(dev->mem, mem_size, 0, node);
594 VHOST_LOG_CONFIG(ERR, "Failed to realloc mem table on node %d\n", node);
599 gp = rte_realloc_socket(dev->guest_pages, dev->max_guest_pages * sizeof(*gp),
600 RTE_CACHE_LINE_SIZE, node);
602 VHOST_LOG_CONFIG(ERR, "Failed to realloc guest pages on node %d\n", node);
605 dev->guest_pages = gp;
610 static struct virtio_net*
611 numa_realloc(struct virtio_net *dev, int index __rte_unused)
617 /* Converts QEMU virtual address to Vhost virtual address. */
619 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
621 struct rte_vhost_mem_region *r;
624 if (unlikely(!dev || !dev->mem))
627 /* Find the region where the address lives. */
628 for (i = 0; i < dev->mem->nregions; i++) {
629 r = &dev->mem->regions[i];
631 if (qva >= r->guest_user_addr &&
632 qva < r->guest_user_addr + r->size) {
634 if (unlikely(*len > r->guest_user_addr + r->size - qva))
635 *len = r->guest_user_addr + r->size - qva;
637 return qva - r->guest_user_addr +
649 * Converts ring address to Vhost virtual address.
650 * If IOMMU is enabled, the ring address is a guest IO virtual address,
651 * else it is a QEMU virtual address.
654 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
655 uint64_t ra, uint64_t *size)
657 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
660 vhost_user_iotlb_rd_lock(vq);
661 vva = vhost_iova_to_vva(dev, vq, ra,
662 size, VHOST_ACCESS_RW);
663 vhost_user_iotlb_rd_unlock(vq);
668 return qva_to_vva(dev, ra, size);
672 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
676 vhost_user_iotlb_rd_lock(vq);
677 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
678 vhost_user_iotlb_rd_unlock(vq);
683 static struct virtio_net *
684 translate_ring_addresses(struct virtio_net *dev, int vq_index)
686 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
687 struct vhost_vring_addr *addr = &vq->ring_addrs;
688 uint64_t len, expected_len;
690 if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
692 log_addr_to_gpa(dev, vq);
693 if (vq->log_guest_addr == 0) {
694 VHOST_LOG_CONFIG(DEBUG,
695 "(%d) failed to map log_guest_addr.\n",
701 if (vq_is_packed(dev)) {
702 len = sizeof(struct vring_packed_desc) * vq->size;
703 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
704 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
705 if (vq->desc_packed == NULL ||
706 len != sizeof(struct vring_packed_desc) *
708 VHOST_LOG_CONFIG(DEBUG,
709 "(%d) failed to map desc_packed ring.\n",
714 dev = numa_realloc(dev, vq_index);
715 vq = dev->virtqueue[vq_index];
716 addr = &vq->ring_addrs;
718 len = sizeof(struct vring_packed_desc_event);
719 vq->driver_event = (struct vring_packed_desc_event *)
720 (uintptr_t)ring_addr_to_vva(dev,
721 vq, addr->avail_user_addr, &len);
722 if (vq->driver_event == NULL ||
723 len != sizeof(struct vring_packed_desc_event)) {
724 VHOST_LOG_CONFIG(DEBUG,
725 "(%d) failed to find driver area address.\n",
730 len = sizeof(struct vring_packed_desc_event);
731 vq->device_event = (struct vring_packed_desc_event *)
732 (uintptr_t)ring_addr_to_vva(dev,
733 vq, addr->used_user_addr, &len);
734 if (vq->device_event == NULL ||
735 len != sizeof(struct vring_packed_desc_event)) {
736 VHOST_LOG_CONFIG(DEBUG,
737 "(%d) failed to find device area address.\n",
742 vq->access_ok = true;
746 /* The addresses are converted from QEMU virtual to Vhost virtual. */
747 if (vq->desc && vq->avail && vq->used)
750 len = sizeof(struct vring_desc) * vq->size;
751 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
752 vq, addr->desc_user_addr, &len);
753 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
754 VHOST_LOG_CONFIG(DEBUG,
755 "(%d) failed to map desc ring.\n",
760 dev = numa_realloc(dev, vq_index);
761 vq = dev->virtqueue[vq_index];
762 addr = &vq->ring_addrs;
764 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
765 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
766 len += sizeof(uint16_t);
768 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
769 vq, addr->avail_user_addr, &len);
770 if (vq->avail == 0 || len != expected_len) {
771 VHOST_LOG_CONFIG(DEBUG,
772 "(%d) failed to map avail ring.\n",
777 len = sizeof(struct vring_used) +
778 sizeof(struct vring_used_elem) * vq->size;
779 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
780 len += sizeof(uint16_t);
782 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
783 vq, addr->used_user_addr, &len);
784 if (vq->used == 0 || len != expected_len) {
785 VHOST_LOG_CONFIG(DEBUG,
786 "(%d) failed to map used ring.\n",
791 if (vq->last_used_idx != vq->used->idx) {
792 VHOST_LOG_CONFIG(WARNING,
793 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
794 "some packets maybe resent for Tx and dropped for Rx\n",
795 vq->last_used_idx, vq->used->idx);
796 vq->last_used_idx = vq->used->idx;
797 vq->last_avail_idx = vq->used->idx;
800 vq->access_ok = true;
802 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
804 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
805 dev->vid, vq->avail);
806 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
808 VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
809 dev->vid, vq->log_guest_addr);
815 * The virtio device sends us the desc, used and avail ring addresses.
816 * This function then converts these to our address space.
819 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
820 int main_fd __rte_unused)
822 struct virtio_net *dev = *pdev;
823 struct vhost_virtqueue *vq;
824 struct vhost_vring_addr *addr = &msg->payload.addr;
827 if (validate_msg_fds(msg, 0) != 0)
828 return RTE_VHOST_MSG_RESULT_ERR;
830 if (dev->mem == NULL)
831 return RTE_VHOST_MSG_RESULT_ERR;
833 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
834 vq = dev->virtqueue[msg->payload.addr.index];
836 access_ok = vq->access_ok;
839 * Rings addresses should not be interpreted as long as the ring is not
840 * started and enabled
842 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
844 vring_invalidate(dev, vq);
846 if ((vq->enabled && (dev->features &
847 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
849 dev = translate_ring_addresses(dev, msg->payload.addr.index);
851 return RTE_VHOST_MSG_RESULT_ERR;
856 return RTE_VHOST_MSG_RESULT_OK;
860 * The virtio device sends us the available ring last used index.
863 vhost_user_set_vring_base(struct virtio_net **pdev,
864 struct VhostUserMsg *msg,
865 int main_fd __rte_unused)
867 struct virtio_net *dev = *pdev;
868 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
869 uint64_t val = msg->payload.state.num;
871 if (validate_msg_fds(msg, 0) != 0)
872 return RTE_VHOST_MSG_RESULT_ERR;
874 if (vq_is_packed(dev)) {
876 * Bit[0:14]: avail index
877 * Bit[15]: avail wrap counter
879 vq->last_avail_idx = val & 0x7fff;
880 vq->avail_wrap_counter = !!(val & (0x1 << 15));
882 * Set used index to same value as available one, as
883 * their values should be the same since ring processing
884 * was stopped at get time.
886 vq->last_used_idx = vq->last_avail_idx;
887 vq->used_wrap_counter = vq->avail_wrap_counter;
889 vq->last_used_idx = msg->payload.state.num;
890 vq->last_avail_idx = msg->payload.state.num;
893 return RTE_VHOST_MSG_RESULT_OK;
897 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
898 uint64_t host_phys_addr, uint64_t size)
900 struct guest_page *page, *last_page;
901 struct guest_page *old_pages;
903 if (dev->nr_guest_pages == dev->max_guest_pages) {
904 dev->max_guest_pages *= 2;
905 old_pages = dev->guest_pages;
906 dev->guest_pages = rte_realloc(dev->guest_pages,
907 dev->max_guest_pages * sizeof(*page),
908 RTE_CACHE_LINE_SIZE);
909 if (dev->guest_pages == NULL) {
910 VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
916 if (dev->nr_guest_pages > 0) {
917 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
918 /* merge if the two pages are continuous */
919 if (host_phys_addr == last_page->host_phys_addr +
921 last_page->size += size;
926 page = &dev->guest_pages[dev->nr_guest_pages++];
927 page->guest_phys_addr = guest_phys_addr;
928 page->host_phys_addr = host_phys_addr;
935 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
938 uint64_t reg_size = reg->size;
939 uint64_t host_user_addr = reg->host_user_addr;
940 uint64_t guest_phys_addr = reg->guest_phys_addr;
941 uint64_t host_phys_addr;
944 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
945 size = page_size - (guest_phys_addr & (page_size - 1));
946 size = RTE_MIN(size, reg_size);
948 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
951 host_user_addr += size;
952 guest_phys_addr += size;
955 while (reg_size > 0) {
956 size = RTE_MIN(reg_size, page_size);
957 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
959 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
963 host_user_addr += size;
964 guest_phys_addr += size;
968 /* sort guest page array if over binary search threshold */
969 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
970 qsort((void *)dev->guest_pages, dev->nr_guest_pages,
971 sizeof(struct guest_page), guest_page_addrcmp);
977 #ifdef RTE_LIBRTE_VHOST_DEBUG
978 /* TODO: enable it only in debug mode? */
980 dump_guest_pages(struct virtio_net *dev)
983 struct guest_page *page;
985 for (i = 0; i < dev->nr_guest_pages; i++) {
986 page = &dev->guest_pages[i];
988 VHOST_LOG_CONFIG(INFO,
989 "guest physical page region %u\n"
990 "\t guest_phys_addr: %" PRIx64 "\n"
991 "\t host_phys_addr : %" PRIx64 "\n"
992 "\t size : %" PRIx64 "\n",
994 page->guest_phys_addr,
995 page->host_phys_addr,
1000 #define dump_guest_pages(dev)
1004 vhost_memory_changed(struct VhostUserMemory *new,
1005 struct rte_vhost_memory *old)
1009 if (new->nregions != old->nregions)
1012 for (i = 0; i < new->nregions; ++i) {
1013 VhostUserMemoryRegion *new_r = &new->regions[i];
1014 struct rte_vhost_mem_region *old_r = &old->regions[i];
1016 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
1018 if (new_r->memory_size != old_r->size)
1020 if (new_r->userspace_addr != old_r->guest_user_addr)
1027 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1029 vhost_user_postcopy_region_register(struct virtio_net *dev,
1030 struct rte_vhost_mem_region *reg)
1032 struct uffdio_register reg_struct;
1035 * Let's register all the mmap'ed area to ensure
1036 * alignment on page boundary.
1038 reg_struct.range.start = (uint64_t)(uintptr_t)reg->mmap_addr;
1039 reg_struct.range.len = reg->mmap_size;
1040 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1042 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1044 VHOST_LOG_CONFIG(ERR, "Failed to register ufd for region "
1045 "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n",
1046 (uint64_t)reg_struct.range.start,
1047 (uint64_t)reg_struct.range.start +
1048 (uint64_t)reg_struct.range.len - 1,
1054 VHOST_LOG_CONFIG(INFO, "\t userfaultfd registered for range : %" PRIx64 " - %" PRIx64 "\n",
1055 (uint64_t)reg_struct.range.start,
1056 (uint64_t)reg_struct.range.start +
1057 (uint64_t)reg_struct.range.len - 1);
1063 vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused,
1064 struct rte_vhost_mem_region *reg __rte_unused)
1071 vhost_user_postcopy_register(struct virtio_net *dev, int main_fd,
1072 struct VhostUserMsg *msg)
1074 struct VhostUserMemory *memory;
1075 struct rte_vhost_mem_region *reg;
1076 VhostUserMsg ack_msg;
1079 if (!dev->postcopy_listening)
1083 * We haven't a better way right now than sharing
1084 * DPDK's virtual address with Qemu, so that Qemu can
1085 * retrieve the region offset when handling userfaults.
1087 memory = &msg->payload.memory;
1088 for (i = 0; i < memory->nregions; i++) {
1089 reg = &dev->mem->regions[i];
1090 memory->regions[i].userspace_addr = reg->host_user_addr;
1093 /* Send the addresses back to qemu */
1095 send_vhost_reply(main_fd, msg);
1097 /* Wait for qemu to acknolwedge it's got the addresses
1098 * we've got to wait before we're allowed to generate faults.
1100 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1101 VHOST_LOG_CONFIG(ERR,
1102 "Failed to read qemu ack on postcopy set-mem-table\n");
1106 if (validate_msg_fds(&ack_msg, 0) != 0)
1109 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1110 VHOST_LOG_CONFIG(ERR,
1111 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1112 ack_msg.request.master);
1116 /* Now userfault register and we can use the memory */
1117 for (i = 0; i < memory->nregions; i++) {
1118 reg = &dev->mem->regions[i];
1119 if (vhost_user_postcopy_region_register(dev, reg) < 0)
1127 vhost_user_mmap_region(struct virtio_net *dev,
1128 struct rte_vhost_mem_region *region,
1129 uint64_t mmap_offset)
1136 /* Check for memory_size + mmap_offset overflow */
1137 if (mmap_offset >= -region->size) {
1138 VHOST_LOG_CONFIG(ERR,
1139 "mmap_offset (%#"PRIx64") and memory_size "
1140 "(%#"PRIx64") overflow\n",
1141 mmap_offset, region->size);
1145 mmap_size = region->size + mmap_offset;
1147 /* mmap() without flag of MAP_ANONYMOUS, should be called with length
1148 * argument aligned with hugepagesz at older longterm version Linux,
1149 * like 2.6.32 and 3.2.72, or mmap() will fail with EINVAL.
1151 * To avoid failure, make sure in caller to keep length aligned.
1153 alignment = get_blk_size(region->fd);
1154 if (alignment == (uint64_t)-1) {
1155 VHOST_LOG_CONFIG(ERR,
1156 "couldn't get hugepage size through fstat\n");
1159 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1160 if (mmap_size == 0) {
1162 * It could happen if initial mmap_size + alignment overflows
1163 * the sizeof uint64, which could happen if either mmap_size or
1164 * alignment value is wrong.
1166 * mmap() kernel implementation would return an error, but
1167 * better catch it before and provide useful info in the logs.
1169 VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
1170 "or alignment (0x%" PRIx64 ") is invalid\n",
1171 region->size + mmap_offset, alignment);
1175 populate = dev->async_copy ? MAP_POPULATE : 0;
1176 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1177 MAP_SHARED | populate, region->fd, 0);
1179 if (mmap_addr == MAP_FAILED) {
1180 VHOST_LOG_CONFIG(ERR, "mmap failed (%s).\n", strerror(errno));
1184 region->mmap_addr = mmap_addr;
1185 region->mmap_size = mmap_size;
1186 region->host_user_addr = (uint64_t)(uintptr_t)mmap_addr + mmap_offset;
1188 if (dev->async_copy)
1189 if (add_guest_pages(dev, region, alignment) < 0) {
1190 VHOST_LOG_CONFIG(ERR,
1191 "adding guest pages to region failed.\n");
1195 VHOST_LOG_CONFIG(INFO,
1196 "guest memory region size: 0x%" PRIx64 "\n"
1197 "\t guest physical addr: 0x%" PRIx64 "\n"
1198 "\t guest virtual addr: 0x%" PRIx64 "\n"
1199 "\t host virtual addr: 0x%" PRIx64 "\n"
1200 "\t mmap addr : 0x%" PRIx64 "\n"
1201 "\t mmap size : 0x%" PRIx64 "\n"
1202 "\t mmap align: 0x%" PRIx64 "\n"
1203 "\t mmap off : 0x%" PRIx64 "\n",
1205 region->guest_phys_addr,
1206 region->guest_user_addr,
1207 region->host_user_addr,
1208 (uint64_t)(uintptr_t)mmap_addr,
1217 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
1220 struct virtio_net *dev = *pdev;
1221 struct VhostUserMemory *memory = &msg->payload.memory;
1222 struct rte_vhost_mem_region *reg;
1223 int numa_node = SOCKET_ID_ANY;
1224 uint64_t mmap_offset;
1227 if (validate_msg_fds(msg, memory->nregions) != 0)
1228 return RTE_VHOST_MSG_RESULT_ERR;
1230 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
1231 VHOST_LOG_CONFIG(ERR,
1232 "too many memory regions (%u)\n", memory->nregions);
1236 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
1237 VHOST_LOG_CONFIG(INFO,
1238 "(%d) memory regions not changed\n", dev->vid);
1242 return RTE_VHOST_MSG_RESULT_OK;
1246 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
1247 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
1249 if (vdpa_dev && vdpa_dev->ops->dev_close)
1250 vdpa_dev->ops->dev_close(dev->vid);
1251 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1253 free_mem_region(dev);
1258 /* Flush IOTLB cache as previous HVAs are now invalid */
1259 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
1260 for (i = 0; i < dev->nr_vring; i++)
1261 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
1264 * If VQ 0 has already been allocated, try to allocate on the same
1265 * NUMA node. It can be reallocated later in numa_realloc().
1267 if (dev->nr_vring > 0)
1268 numa_node = dev->virtqueue[0]->numa_node;
1270 dev->nr_guest_pages = 0;
1271 if (dev->guest_pages == NULL) {
1272 dev->max_guest_pages = 8;
1273 dev->guest_pages = rte_zmalloc_socket(NULL,
1274 dev->max_guest_pages *
1275 sizeof(struct guest_page),
1276 RTE_CACHE_LINE_SIZE,
1278 if (dev->guest_pages == NULL) {
1279 VHOST_LOG_CONFIG(ERR,
1280 "(%d) failed to allocate memory "
1281 "for dev->guest_pages\n",
1287 dev->mem = rte_zmalloc_socket("vhost-mem-table", sizeof(struct rte_vhost_memory) +
1288 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0, numa_node);
1289 if (dev->mem == NULL) {
1290 VHOST_LOG_CONFIG(ERR,
1291 "(%d) failed to allocate memory for dev->mem\n",
1293 goto free_guest_pages;
1296 for (i = 0; i < memory->nregions; i++) {
1297 reg = &dev->mem->regions[i];
1299 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1300 reg->guest_user_addr = memory->regions[i].userspace_addr;
1301 reg->size = memory->regions[i].memory_size;
1302 reg->fd = msg->fds[i];
1305 * Assign invalid file descriptor value to avoid double
1306 * closing on error path.
1310 mmap_offset = memory->regions[i].mmap_offset;
1312 if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) {
1313 VHOST_LOG_CONFIG(ERR, "Failed to mmap region %u\n", i);
1314 goto free_mem_table;
1317 dev->mem->nregions++;
1320 if (vhost_user_postcopy_register(dev, main_fd, msg) < 0)
1321 goto free_mem_table;
1323 for (i = 0; i < dev->nr_vring; i++) {
1324 struct vhost_virtqueue *vq = dev->virtqueue[i];
1329 if (vq->desc || vq->avail || vq->used) {
1331 * If the memory table got updated, the ring addresses
1332 * need to be translated again as virtual addresses have
1335 vring_invalidate(dev, vq);
1337 dev = translate_ring_addresses(dev, i);
1340 goto free_mem_table;
1347 dump_guest_pages(dev);
1349 return RTE_VHOST_MSG_RESULT_OK;
1352 free_mem_region(dev);
1356 rte_free(dev->guest_pages);
1357 dev->guest_pages = NULL;
1360 return RTE_VHOST_MSG_RESULT_ERR;
1364 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1371 if (vq_is_packed(dev))
1372 rings_ok = vq->desc_packed && vq->driver_event &&
1375 rings_ok = vq->desc && vq->avail && vq->used;
1378 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1379 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1383 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u
1386 virtio_is_ready(struct virtio_net *dev)
1388 struct vhost_virtqueue *vq;
1389 uint32_t i, nr_vring = dev->nr_vring;
1391 if (dev->flags & VIRTIO_DEV_READY)
1397 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) {
1398 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
1400 if (dev->nr_vring < nr_vring)
1404 for (i = 0; i < nr_vring; i++) {
1405 vq = dev->virtqueue[i];
1407 if (!vq_is_ready(dev, vq))
1411 /* If supported, ensure the frontend is really done with config */
1412 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
1413 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
1416 dev->flags |= VIRTIO_DEV_READY;
1418 if (!(dev->flags & VIRTIO_DEV_RUNNING))
1419 VHOST_LOG_CONFIG(INFO,
1420 "virtio is now ready for processing.\n");
1425 inflight_mem_alloc(const char *name, size_t size, int *fd)
1429 char fname[20] = "/tmp/memfd-XXXXXX";
1432 #ifdef MEMFD_SUPPORTED
1433 mfd = memfd_create(name, MFD_CLOEXEC);
1438 mfd = mkstemp(fname);
1440 VHOST_LOG_CONFIG(ERR,
1441 "failed to get inflight buffer fd\n");
1448 if (ftruncate(mfd, size) == -1) {
1449 VHOST_LOG_CONFIG(ERR,
1450 "failed to alloc inflight buffer\n");
1455 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
1456 if (ptr == MAP_FAILED) {
1457 VHOST_LOG_CONFIG(ERR,
1458 "failed to mmap inflight buffer\n");
1468 get_pervq_shm_size_split(uint16_t queue_size)
1470 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
1471 queue_size + sizeof(uint64_t) +
1472 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
1476 get_pervq_shm_size_packed(uint16_t queue_size)
1478 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
1479 * queue_size + sizeof(uint64_t) +
1480 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
1481 INFLIGHT_ALIGNMENT);
1485 vhost_user_get_inflight_fd(struct virtio_net **pdev,
1487 int main_fd __rte_unused)
1489 struct rte_vhost_inflight_info_packed *inflight_packed;
1490 uint64_t pervq_inflight_size, mmap_size;
1491 uint16_t num_queues, queue_size;
1492 struct virtio_net *dev = *pdev;
1496 if (msg->size != sizeof(msg->payload.inflight)) {
1497 VHOST_LOG_CONFIG(ERR,
1498 "invalid get_inflight_fd message size is %d\n",
1500 return RTE_VHOST_MSG_RESULT_ERR;
1503 if (dev->inflight_info == NULL) {
1504 dev->inflight_info = calloc(1,
1505 sizeof(struct inflight_mem_info));
1506 if (!dev->inflight_info) {
1507 VHOST_LOG_CONFIG(ERR,
1508 "failed to alloc dev inflight area\n");
1509 return RTE_VHOST_MSG_RESULT_ERR;
1511 dev->inflight_info->fd = -1;
1514 num_queues = msg->payload.inflight.num_queues;
1515 queue_size = msg->payload.inflight.queue_size;
1517 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
1518 msg->payload.inflight.num_queues);
1519 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
1520 msg->payload.inflight.queue_size);
1522 if (vq_is_packed(dev))
1523 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1525 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1527 mmap_size = num_queues * pervq_inflight_size;
1528 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
1530 VHOST_LOG_CONFIG(ERR,
1531 "failed to alloc vhost inflight area\n");
1532 msg->payload.inflight.mmap_size = 0;
1533 return RTE_VHOST_MSG_RESULT_ERR;
1535 memset(addr, 0, mmap_size);
1537 if (dev->inflight_info->addr) {
1538 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1539 dev->inflight_info->addr = NULL;
1542 if (dev->inflight_info->fd >= 0) {
1543 close(dev->inflight_info->fd);
1544 dev->inflight_info->fd = -1;
1547 dev->inflight_info->addr = addr;
1548 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
1549 dev->inflight_info->fd = msg->fds[0] = fd;
1550 msg->payload.inflight.mmap_offset = 0;
1553 if (vq_is_packed(dev)) {
1554 for (i = 0; i < num_queues; i++) {
1556 (struct rte_vhost_inflight_info_packed *)addr;
1557 inflight_packed->used_wrap_counter = 1;
1558 inflight_packed->old_used_wrap_counter = 1;
1559 for (j = 0; j < queue_size; j++)
1560 inflight_packed->desc[j].next = j + 1;
1561 addr = (void *)((char *)addr + pervq_inflight_size);
1565 VHOST_LOG_CONFIG(INFO,
1566 "send inflight mmap_size: %"PRIu64"\n",
1567 msg->payload.inflight.mmap_size);
1568 VHOST_LOG_CONFIG(INFO,
1569 "send inflight mmap_offset: %"PRIu64"\n",
1570 msg->payload.inflight.mmap_offset);
1571 VHOST_LOG_CONFIG(INFO,
1572 "send inflight fd: %d\n", msg->fds[0]);
1574 return RTE_VHOST_MSG_RESULT_REPLY;
1578 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
1579 int main_fd __rte_unused)
1581 uint64_t mmap_size, mmap_offset;
1582 uint16_t num_queues, queue_size;
1583 struct virtio_net *dev = *pdev;
1584 uint32_t pervq_inflight_size;
1585 struct vhost_virtqueue *vq;
1590 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
1591 VHOST_LOG_CONFIG(ERR,
1592 "invalid set_inflight_fd message size is %d,fd is %d\n",
1594 return RTE_VHOST_MSG_RESULT_ERR;
1597 mmap_size = msg->payload.inflight.mmap_size;
1598 mmap_offset = msg->payload.inflight.mmap_offset;
1599 num_queues = msg->payload.inflight.num_queues;
1600 queue_size = msg->payload.inflight.queue_size;
1602 if (vq_is_packed(dev))
1603 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1605 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1607 VHOST_LOG_CONFIG(INFO,
1608 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
1609 VHOST_LOG_CONFIG(INFO,
1610 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
1611 VHOST_LOG_CONFIG(INFO,
1612 "set_inflight_fd num_queues: %u\n", num_queues);
1613 VHOST_LOG_CONFIG(INFO,
1614 "set_inflight_fd queue_size: %u\n", queue_size);
1615 VHOST_LOG_CONFIG(INFO,
1616 "set_inflight_fd fd: %d\n", fd);
1617 VHOST_LOG_CONFIG(INFO,
1618 "set_inflight_fd pervq_inflight_size: %d\n",
1619 pervq_inflight_size);
1621 if (!dev->inflight_info) {
1622 dev->inflight_info = calloc(1,
1623 sizeof(struct inflight_mem_info));
1624 if (dev->inflight_info == NULL) {
1625 VHOST_LOG_CONFIG(ERR,
1626 "failed to alloc dev inflight area\n");
1627 return RTE_VHOST_MSG_RESULT_ERR;
1629 dev->inflight_info->fd = -1;
1632 if (dev->inflight_info->addr) {
1633 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1634 dev->inflight_info->addr = NULL;
1637 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
1639 if (addr == MAP_FAILED) {
1640 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
1641 return RTE_VHOST_MSG_RESULT_ERR;
1644 if (dev->inflight_info->fd >= 0) {
1645 close(dev->inflight_info->fd);
1646 dev->inflight_info->fd = -1;
1649 dev->inflight_info->fd = fd;
1650 dev->inflight_info->addr = addr;
1651 dev->inflight_info->size = mmap_size;
1653 for (i = 0; i < num_queues; i++) {
1654 vq = dev->virtqueue[i];
1658 if (vq_is_packed(dev)) {
1659 vq->inflight_packed = addr;
1660 vq->inflight_packed->desc_num = queue_size;
1662 vq->inflight_split = addr;
1663 vq->inflight_split->desc_num = queue_size;
1665 addr = (void *)((char *)addr + pervq_inflight_size);
1668 return RTE_VHOST_MSG_RESULT_OK;
1672 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1673 int main_fd __rte_unused)
1675 struct virtio_net *dev = *pdev;
1676 struct vhost_vring_file file;
1677 struct vhost_virtqueue *vq;
1680 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1681 if (validate_msg_fds(msg, expected_fds) != 0)
1682 return RTE_VHOST_MSG_RESULT_ERR;
1684 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1685 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1686 file.fd = VIRTIO_INVALID_EVENTFD;
1688 file.fd = msg->fds[0];
1689 VHOST_LOG_CONFIG(INFO,
1690 "vring call idx:%d file:%d\n", file.index, file.fd);
1692 vq = dev->virtqueue[file.index];
1696 vhost_user_notify_queue_state(dev, file.index, 0);
1699 if (vq->callfd >= 0)
1702 vq->callfd = file.fd;
1704 return RTE_VHOST_MSG_RESULT_OK;
1707 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1708 struct VhostUserMsg *msg,
1709 int main_fd __rte_unused)
1713 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1714 if (validate_msg_fds(msg, expected_fds) != 0)
1715 return RTE_VHOST_MSG_RESULT_ERR;
1717 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1719 VHOST_LOG_CONFIG(INFO, "not implemented\n");
1721 return RTE_VHOST_MSG_RESULT_OK;
1725 resubmit_desc_compare(const void *a, const void *b)
1727 const struct rte_vhost_resubmit_desc *desc0 = a;
1728 const struct rte_vhost_resubmit_desc *desc1 = b;
1730 if (desc1->counter > desc0->counter)
1737 vhost_check_queue_inflights_split(struct virtio_net *dev,
1738 struct vhost_virtqueue *vq)
1741 uint16_t resubmit_num = 0, last_io, num;
1742 struct vring_used *used = vq->used;
1743 struct rte_vhost_resubmit_info *resubmit;
1744 struct rte_vhost_inflight_info_split *inflight_split;
1746 if (!(dev->protocol_features &
1747 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1748 return RTE_VHOST_MSG_RESULT_OK;
1750 /* The frontend may still not support the inflight feature
1751 * although we negotiate the protocol feature.
1753 if ((!vq->inflight_split))
1754 return RTE_VHOST_MSG_RESULT_OK;
1756 if (!vq->inflight_split->version) {
1757 vq->inflight_split->version = INFLIGHT_VERSION;
1758 return RTE_VHOST_MSG_RESULT_OK;
1761 if (vq->resubmit_inflight)
1762 return RTE_VHOST_MSG_RESULT_OK;
1764 inflight_split = vq->inflight_split;
1765 vq->global_counter = 0;
1766 last_io = inflight_split->last_inflight_io;
1768 if (inflight_split->used_idx != used->idx) {
1769 inflight_split->desc[last_io].inflight = 0;
1770 rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
1771 inflight_split->used_idx = used->idx;
1774 for (i = 0; i < inflight_split->desc_num; i++) {
1775 if (inflight_split->desc[i].inflight == 1)
1779 vq->last_avail_idx += resubmit_num;
1782 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1784 VHOST_LOG_CONFIG(ERR,
1785 "failed to allocate memory for resubmit info.\n");
1786 return RTE_VHOST_MSG_RESULT_ERR;
1789 resubmit->resubmit_list = calloc(resubmit_num,
1790 sizeof(struct rte_vhost_resubmit_desc));
1791 if (!resubmit->resubmit_list) {
1792 VHOST_LOG_CONFIG(ERR,
1793 "failed to allocate memory for inflight desc.\n");
1795 return RTE_VHOST_MSG_RESULT_ERR;
1799 for (i = 0; i < vq->inflight_split->desc_num; i++) {
1800 if (vq->inflight_split->desc[i].inflight == 1) {
1801 resubmit->resubmit_list[num].index = i;
1802 resubmit->resubmit_list[num].counter =
1803 inflight_split->desc[i].counter;
1807 resubmit->resubmit_num = num;
1809 if (resubmit->resubmit_num > 1)
1810 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1811 sizeof(struct rte_vhost_resubmit_desc),
1812 resubmit_desc_compare);
1814 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1815 vq->resubmit_inflight = resubmit;
1818 return RTE_VHOST_MSG_RESULT_OK;
1822 vhost_check_queue_inflights_packed(struct virtio_net *dev,
1823 struct vhost_virtqueue *vq)
1826 uint16_t resubmit_num = 0, old_used_idx, num;
1827 struct rte_vhost_resubmit_info *resubmit;
1828 struct rte_vhost_inflight_info_packed *inflight_packed;
1830 if (!(dev->protocol_features &
1831 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1832 return RTE_VHOST_MSG_RESULT_OK;
1834 /* The frontend may still not support the inflight feature
1835 * although we negotiate the protocol feature.
1837 if ((!vq->inflight_packed))
1838 return RTE_VHOST_MSG_RESULT_OK;
1840 if (!vq->inflight_packed->version) {
1841 vq->inflight_packed->version = INFLIGHT_VERSION;
1842 return RTE_VHOST_MSG_RESULT_OK;
1845 if (vq->resubmit_inflight)
1846 return RTE_VHOST_MSG_RESULT_OK;
1848 inflight_packed = vq->inflight_packed;
1849 vq->global_counter = 0;
1850 old_used_idx = inflight_packed->old_used_idx;
1852 if (inflight_packed->used_idx != old_used_idx) {
1853 if (inflight_packed->desc[old_used_idx].inflight == 0) {
1854 inflight_packed->old_used_idx =
1855 inflight_packed->used_idx;
1856 inflight_packed->old_used_wrap_counter =
1857 inflight_packed->used_wrap_counter;
1858 inflight_packed->old_free_head =
1859 inflight_packed->free_head;
1861 inflight_packed->used_idx =
1862 inflight_packed->old_used_idx;
1863 inflight_packed->used_wrap_counter =
1864 inflight_packed->old_used_wrap_counter;
1865 inflight_packed->free_head =
1866 inflight_packed->old_free_head;
1870 for (i = 0; i < inflight_packed->desc_num; i++) {
1871 if (inflight_packed->desc[i].inflight == 1)
1876 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1877 if (resubmit == NULL) {
1878 VHOST_LOG_CONFIG(ERR,
1879 "failed to allocate memory for resubmit info.\n");
1880 return RTE_VHOST_MSG_RESULT_ERR;
1883 resubmit->resubmit_list = calloc(resubmit_num,
1884 sizeof(struct rte_vhost_resubmit_desc));
1885 if (resubmit->resubmit_list == NULL) {
1886 VHOST_LOG_CONFIG(ERR,
1887 "failed to allocate memory for resubmit desc.\n");
1889 return RTE_VHOST_MSG_RESULT_ERR;
1893 for (i = 0; i < inflight_packed->desc_num; i++) {
1894 if (vq->inflight_packed->desc[i].inflight == 1) {
1895 resubmit->resubmit_list[num].index = i;
1896 resubmit->resubmit_list[num].counter =
1897 inflight_packed->desc[i].counter;
1901 resubmit->resubmit_num = num;
1903 if (resubmit->resubmit_num > 1)
1904 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1905 sizeof(struct rte_vhost_resubmit_desc),
1906 resubmit_desc_compare);
1908 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1909 vq->resubmit_inflight = resubmit;
1912 return RTE_VHOST_MSG_RESULT_OK;
1916 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1917 int main_fd __rte_unused)
1919 struct virtio_net *dev = *pdev;
1920 struct vhost_vring_file file;
1921 struct vhost_virtqueue *vq;
1924 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1925 if (validate_msg_fds(msg, expected_fds) != 0)
1926 return RTE_VHOST_MSG_RESULT_ERR;
1928 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1929 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1930 file.fd = VIRTIO_INVALID_EVENTFD;
1932 file.fd = msg->fds[0];
1933 VHOST_LOG_CONFIG(INFO,
1934 "vring kick idx:%d file:%d\n", file.index, file.fd);
1936 /* Interpret ring addresses only when ring is started. */
1937 dev = translate_ring_addresses(dev, file.index);
1939 if (file.fd != VIRTIO_INVALID_EVENTFD)
1942 return RTE_VHOST_MSG_RESULT_ERR;
1947 vq = dev->virtqueue[file.index];
1950 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1951 * the ring starts already enabled. Otherwise, it is enabled via
1952 * the SET_VRING_ENABLE message.
1954 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1960 vhost_user_notify_queue_state(dev, file.index, 0);
1963 if (vq->kickfd >= 0)
1965 vq->kickfd = file.fd;
1967 if (vq_is_packed(dev)) {
1968 if (vhost_check_queue_inflights_packed(dev, vq)) {
1969 VHOST_LOG_CONFIG(ERR,
1970 "failed to inflights for vq: %d\n", file.index);
1971 return RTE_VHOST_MSG_RESULT_ERR;
1974 if (vhost_check_queue_inflights_split(dev, vq)) {
1975 VHOST_LOG_CONFIG(ERR,
1976 "failed to inflights for vq: %d\n", file.index);
1977 return RTE_VHOST_MSG_RESULT_ERR;
1981 return RTE_VHOST_MSG_RESULT_OK;
1985 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1988 vhost_user_get_vring_base(struct virtio_net **pdev,
1989 struct VhostUserMsg *msg,
1990 int main_fd __rte_unused)
1992 struct virtio_net *dev = *pdev;
1993 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1996 if (validate_msg_fds(msg, 0) != 0)
1997 return RTE_VHOST_MSG_RESULT_ERR;
1999 /* We have to stop the queue (virtio) if it is running. */
2000 vhost_destroy_device_notify(dev);
2002 dev->flags &= ~VIRTIO_DEV_READY;
2003 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
2005 /* Here we are safe to get the indexes */
2006 if (vq_is_packed(dev)) {
2008 * Bit[0:14]: avail index
2009 * Bit[15]: avail wrap counter
2011 val = vq->last_avail_idx & 0x7fff;
2012 val |= vq->avail_wrap_counter << 15;
2013 msg->payload.state.num = val;
2015 msg->payload.state.num = vq->last_avail_idx;
2018 VHOST_LOG_CONFIG(INFO,
2019 "vring base idx:%d file:%d\n", msg->payload.state.index,
2020 msg->payload.state.num);
2022 * Based on current qemu vhost-user implementation, this message is
2023 * sent and only sent in vhost_vring_stop.
2024 * TODO: cleanup the vring, it isn't usable since here.
2026 if (vq->kickfd >= 0)
2029 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
2031 if (vq->callfd >= 0)
2034 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
2036 vq->signalled_used_valid = false;
2038 if (vq_is_packed(dev)) {
2039 rte_free(vq->shadow_used_packed);
2040 vq->shadow_used_packed = NULL;
2042 rte_free(vq->shadow_used_split);
2043 vq->shadow_used_split = NULL;
2046 rte_free(vq->batch_copy_elems);
2047 vq->batch_copy_elems = NULL;
2049 rte_free(vq->log_cache);
2050 vq->log_cache = NULL;
2052 msg->size = sizeof(msg->payload.state);
2055 vring_invalidate(dev, vq);
2057 return RTE_VHOST_MSG_RESULT_REPLY;
2061 * when virtio queues are ready to work, qemu will send us to
2062 * enable the virtio queue pair.
2065 vhost_user_set_vring_enable(struct virtio_net **pdev,
2066 struct VhostUserMsg *msg,
2067 int main_fd __rte_unused)
2069 struct virtio_net *dev = *pdev;
2070 bool enable = !!msg->payload.state.num;
2071 int index = (int)msg->payload.state.index;
2073 if (validate_msg_fds(msg, 0) != 0)
2074 return RTE_VHOST_MSG_RESULT_ERR;
2076 VHOST_LOG_CONFIG(INFO,
2077 "set queue enable: %d to qp idx: %d\n",
2080 if (enable && dev->virtqueue[index]->async_registered) {
2081 if (dev->virtqueue[index]->async_pkts_inflight_n) {
2082 VHOST_LOG_CONFIG(ERR, "failed to enable vring. "
2083 "async inflight packets must be completed first\n");
2084 return RTE_VHOST_MSG_RESULT_ERR;
2088 dev->virtqueue[index]->enabled = enable;
2090 return RTE_VHOST_MSG_RESULT_OK;
2094 vhost_user_get_protocol_features(struct virtio_net **pdev,
2095 struct VhostUserMsg *msg,
2096 int main_fd __rte_unused)
2098 struct virtio_net *dev = *pdev;
2099 uint64_t features, protocol_features;
2101 if (validate_msg_fds(msg, 0) != 0)
2102 return RTE_VHOST_MSG_RESULT_ERR;
2104 rte_vhost_driver_get_features(dev->ifname, &features);
2105 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
2107 msg->payload.u64 = protocol_features;
2108 msg->size = sizeof(msg->payload.u64);
2111 return RTE_VHOST_MSG_RESULT_REPLY;
2115 vhost_user_set_protocol_features(struct virtio_net **pdev,
2116 struct VhostUserMsg *msg,
2117 int main_fd __rte_unused)
2119 struct virtio_net *dev = *pdev;
2120 uint64_t protocol_features = msg->payload.u64;
2121 uint64_t slave_protocol_features = 0;
2123 if (validate_msg_fds(msg, 0) != 0)
2124 return RTE_VHOST_MSG_RESULT_ERR;
2126 rte_vhost_driver_get_protocol_features(dev->ifname,
2127 &slave_protocol_features);
2128 if (protocol_features & ~slave_protocol_features) {
2129 VHOST_LOG_CONFIG(ERR,
2130 "(%d) received invalid protocol features.\n",
2132 return RTE_VHOST_MSG_RESULT_ERR;
2135 dev->protocol_features = protocol_features;
2136 VHOST_LOG_CONFIG(INFO,
2137 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
2138 dev->protocol_features);
2140 return RTE_VHOST_MSG_RESULT_OK;
2144 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
2145 int main_fd __rte_unused)
2147 struct virtio_net *dev = *pdev;
2148 int fd = msg->fds[0];
2153 if (validate_msg_fds(msg, 1) != 0)
2154 return RTE_VHOST_MSG_RESULT_ERR;
2157 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
2158 return RTE_VHOST_MSG_RESULT_ERR;
2161 if (msg->size != sizeof(VhostUserLog)) {
2162 VHOST_LOG_CONFIG(ERR,
2163 "invalid log base msg size: %"PRId32" != %d\n",
2164 msg->size, (int)sizeof(VhostUserLog));
2168 size = msg->payload.log.mmap_size;
2169 off = msg->payload.log.mmap_offset;
2171 /* Check for mmap size and offset overflow. */
2173 VHOST_LOG_CONFIG(ERR,
2174 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
2179 VHOST_LOG_CONFIG(INFO,
2180 "log mmap size: %"PRId64", offset: %"PRId64"\n",
2184 * mmap from 0 to workaround a hugepage mmap bug: mmap will
2185 * fail when offset is not page size aligned.
2187 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2189 if (addr == MAP_FAILED) {
2190 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
2191 return RTE_VHOST_MSG_RESULT_ERR;
2195 * Free previously mapped log memory on occasionally
2196 * multiple VHOST_USER_SET_LOG_BASE.
2198 if (dev->log_addr) {
2199 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
2201 dev->log_addr = (uint64_t)(uintptr_t)addr;
2202 dev->log_base = dev->log_addr + off;
2203 dev->log_size = size;
2205 for (i = 0; i < dev->nr_vring; i++) {
2206 struct vhost_virtqueue *vq = dev->virtqueue[i];
2208 rte_free(vq->log_cache);
2209 vq->log_cache = NULL;
2210 vq->log_cache_nb_elem = 0;
2211 vq->log_cache = rte_malloc_socket("vq log cache",
2212 sizeof(struct log_cache_entry) * VHOST_LOG_CACHE_NR,
2215 * If log cache alloc fail, don't fail migration, but no
2216 * caching will be done, which will impact performance
2219 VHOST_LOG_CONFIG(ERR, "Failed to allocate VQ logging cache\n");
2223 * The spec is not clear about it (yet), but QEMU doesn't expect
2224 * any payload in the reply.
2229 return RTE_VHOST_MSG_RESULT_REPLY;
2233 return RTE_VHOST_MSG_RESULT_ERR;
2236 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
2237 struct VhostUserMsg *msg,
2238 int main_fd __rte_unused)
2240 if (validate_msg_fds(msg, 1) != 0)
2241 return RTE_VHOST_MSG_RESULT_ERR;
2244 VHOST_LOG_CONFIG(INFO, "not implemented.\n");
2246 return RTE_VHOST_MSG_RESULT_OK;
2250 * An rarp packet is constructed and broadcasted to notify switches about
2251 * the new location of the migrated VM, so that packets from outside will
2252 * not be lost after migration.
2254 * However, we don't actually "send" a rarp packet here, instead, we set
2255 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
2258 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
2259 int main_fd __rte_unused)
2261 struct virtio_net *dev = *pdev;
2262 uint8_t *mac = (uint8_t *)&msg->payload.u64;
2263 struct rte_vdpa_device *vdpa_dev;
2265 if (validate_msg_fds(msg, 0) != 0)
2266 return RTE_VHOST_MSG_RESULT_ERR;
2268 VHOST_LOG_CONFIG(DEBUG,
2269 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
2270 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2271 memcpy(dev->mac.addr_bytes, mac, 6);
2274 * Set the flag to inject a RARP broadcast packet at
2275 * rte_vhost_dequeue_burst().
2277 * __ATOMIC_RELEASE ordering is for making sure the mac is
2278 * copied before the flag is set.
2280 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
2281 vdpa_dev = dev->vdpa_dev;
2282 if (vdpa_dev && vdpa_dev->ops->migration_done)
2283 vdpa_dev->ops->migration_done(dev->vid);
2285 return RTE_VHOST_MSG_RESULT_OK;
2289 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
2290 int main_fd __rte_unused)
2292 struct virtio_net *dev = *pdev;
2294 if (validate_msg_fds(msg, 0) != 0)
2295 return RTE_VHOST_MSG_RESULT_ERR;
2297 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
2298 msg->payload.u64 > VIRTIO_MAX_MTU) {
2299 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
2302 return RTE_VHOST_MSG_RESULT_ERR;
2305 dev->mtu = msg->payload.u64;
2307 return RTE_VHOST_MSG_RESULT_OK;
2311 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
2312 int main_fd __rte_unused)
2314 struct virtio_net *dev = *pdev;
2315 int fd = msg->fds[0];
2317 if (validate_msg_fds(msg, 1) != 0)
2318 return RTE_VHOST_MSG_RESULT_ERR;
2321 VHOST_LOG_CONFIG(ERR,
2322 "Invalid file descriptor for slave channel (%d)\n",
2324 return RTE_VHOST_MSG_RESULT_ERR;
2327 if (dev->slave_req_fd >= 0)
2328 close(dev->slave_req_fd);
2330 dev->slave_req_fd = fd;
2332 return RTE_VHOST_MSG_RESULT_OK;
2336 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2338 struct vhost_vring_addr *ra;
2339 uint64_t start, end, len;
2342 end = start + imsg->size;
2344 ra = &vq->ring_addrs;
2345 len = sizeof(struct vring_desc) * vq->size;
2346 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2349 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
2350 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2353 len = sizeof(struct vring_used) +
2354 sizeof(struct vring_used_elem) * vq->size;
2355 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2358 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2359 len = sizeof(uint64_t);
2360 if (ra->log_guest_addr < end &&
2361 (ra->log_guest_addr + len) > start)
2369 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2371 struct vhost_vring_addr *ra;
2372 uint64_t start, end, len;
2375 end = start + imsg->size;
2377 ra = &vq->ring_addrs;
2378 len = sizeof(struct vring_packed_desc) * vq->size;
2379 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2382 len = sizeof(struct vring_packed_desc_event);
2383 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2386 len = sizeof(struct vring_packed_desc_event);
2387 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2390 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2391 len = sizeof(uint64_t);
2392 if (ra->log_guest_addr < end &&
2393 (ra->log_guest_addr + len) > start)
2400 static int is_vring_iotlb(struct virtio_net *dev,
2401 struct vhost_virtqueue *vq,
2402 struct vhost_iotlb_msg *imsg)
2404 if (vq_is_packed(dev))
2405 return is_vring_iotlb_packed(vq, imsg);
2407 return is_vring_iotlb_split(vq, imsg);
2411 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
2412 int main_fd __rte_unused)
2414 struct virtio_net *dev = *pdev;
2415 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
2419 if (validate_msg_fds(msg, 0) != 0)
2420 return RTE_VHOST_MSG_RESULT_ERR;
2422 switch (imsg->type) {
2423 case VHOST_IOTLB_UPDATE:
2425 vva = qva_to_vva(dev, imsg->uaddr, &len);
2427 return RTE_VHOST_MSG_RESULT_ERR;
2429 for (i = 0; i < dev->nr_vring; i++) {
2430 struct vhost_virtqueue *vq = dev->virtqueue[i];
2435 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
2438 if (is_vring_iotlb(dev, vq, imsg))
2439 *pdev = dev = translate_ring_addresses(dev, i);
2442 case VHOST_IOTLB_INVALIDATE:
2443 for (i = 0; i < dev->nr_vring; i++) {
2444 struct vhost_virtqueue *vq = dev->virtqueue[i];
2449 vhost_user_iotlb_cache_remove(vq, imsg->iova,
2452 if (is_vring_iotlb(dev, vq, imsg))
2453 vring_invalidate(dev, vq);
2457 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
2459 return RTE_VHOST_MSG_RESULT_ERR;
2462 return RTE_VHOST_MSG_RESULT_OK;
2466 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
2467 struct VhostUserMsg *msg,
2468 int main_fd __rte_unused)
2470 struct virtio_net *dev = *pdev;
2471 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
2472 struct uffdio_api api_struct;
2474 if (validate_msg_fds(msg, 0) != 0)
2475 return RTE_VHOST_MSG_RESULT_ERR;
2477 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
2479 if (dev->postcopy_ufd == -1) {
2480 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
2482 return RTE_VHOST_MSG_RESULT_ERR;
2484 api_struct.api = UFFD_API;
2485 api_struct.features = 0;
2486 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
2487 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
2489 close(dev->postcopy_ufd);
2490 dev->postcopy_ufd = -1;
2491 return RTE_VHOST_MSG_RESULT_ERR;
2493 msg->fds[0] = dev->postcopy_ufd;
2496 return RTE_VHOST_MSG_RESULT_REPLY;
2498 dev->postcopy_ufd = -1;
2501 return RTE_VHOST_MSG_RESULT_ERR;
2506 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
2507 struct VhostUserMsg *msg __rte_unused,
2508 int main_fd __rte_unused)
2510 struct virtio_net *dev = *pdev;
2512 if (validate_msg_fds(msg, 0) != 0)
2513 return RTE_VHOST_MSG_RESULT_ERR;
2515 if (dev->mem && dev->mem->nregions) {
2516 VHOST_LOG_CONFIG(ERR,
2517 "Regions already registered at postcopy-listen\n");
2518 return RTE_VHOST_MSG_RESULT_ERR;
2520 dev->postcopy_listening = 1;
2522 return RTE_VHOST_MSG_RESULT_OK;
2526 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
2527 int main_fd __rte_unused)
2529 struct virtio_net *dev = *pdev;
2531 if (validate_msg_fds(msg, 0) != 0)
2532 return RTE_VHOST_MSG_RESULT_ERR;
2534 dev->postcopy_listening = 0;
2535 if (dev->postcopy_ufd >= 0) {
2536 close(dev->postcopy_ufd);
2537 dev->postcopy_ufd = -1;
2540 msg->payload.u64 = 0;
2541 msg->size = sizeof(msg->payload.u64);
2544 return RTE_VHOST_MSG_RESULT_REPLY;
2548 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2549 int main_fd __rte_unused)
2551 struct virtio_net *dev = *pdev;
2553 if (validate_msg_fds(msg, 0) != 0)
2554 return RTE_VHOST_MSG_RESULT_ERR;
2556 msg->payload.u64 = dev->status;
2557 msg->size = sizeof(msg->payload.u64);
2560 return RTE_VHOST_MSG_RESULT_REPLY;
2564 vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2565 int main_fd __rte_unused)
2567 struct virtio_net *dev = *pdev;
2569 if (validate_msg_fds(msg, 0) != 0)
2570 return RTE_VHOST_MSG_RESULT_ERR;
2572 /* As per Virtio specification, the device status is 8bits long */
2573 if (msg->payload.u64 > UINT8_MAX) {
2574 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
2576 return RTE_VHOST_MSG_RESULT_ERR;
2579 dev->status = msg->payload.u64;
2581 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
2582 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
2583 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
2585 * Clear the bit to let the driver know about the feature
2586 * negotiation failure
2588 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
2591 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
2593 "\t-ACKNOWLEDGE: %u\n"
2595 "\t-FEATURES_OK: %u\n"
2596 "\t-DRIVER_OK: %u\n"
2597 "\t-DEVICE_NEED_RESET: %u\n"
2600 (dev->status == VIRTIO_DEVICE_STATUS_RESET),
2601 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
2602 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
2603 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
2604 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
2605 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
2606 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
2608 return RTE_VHOST_MSG_RESULT_OK;
2611 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
2612 struct VhostUserMsg *msg,
2614 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
2615 [VHOST_USER_NONE] = NULL,
2616 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
2617 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
2618 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
2619 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
2620 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
2621 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
2622 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
2623 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
2624 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
2625 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
2626 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
2627 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
2628 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
2629 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
2630 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
2631 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
2632 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
2633 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
2634 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
2635 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
2636 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
2637 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
2638 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
2639 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
2640 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
2641 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
2642 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
2643 [VHOST_USER_SET_STATUS] = vhost_user_set_status,
2644 [VHOST_USER_GET_STATUS] = vhost_user_get_status,
2647 /* return bytes# of read on success or negative val on failure. */
2649 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
2653 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
2654 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
2657 } else if (ret != VHOST_USER_HDR_SIZE) {
2658 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
2664 if (msg->size > sizeof(msg->payload)) {
2665 VHOST_LOG_CONFIG(ERR,
2666 "invalid msg size: %d\n", msg->size);
2669 ret = read(sockfd, &msg->payload, msg->size);
2672 if (ret != (int)msg->size) {
2673 VHOST_LOG_CONFIG(ERR,
2674 "read control message failed\n");
2683 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
2688 return send_fd_message(sockfd, (char *)msg,
2689 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
2693 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
2698 msg->flags &= ~VHOST_USER_VERSION_MASK;
2699 msg->flags &= ~VHOST_USER_NEED_REPLY;
2700 msg->flags |= VHOST_USER_VERSION;
2701 msg->flags |= VHOST_USER_REPLY_MASK;
2703 return send_vhost_message(sockfd, msg);
2707 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
2711 if (msg->flags & VHOST_USER_NEED_REPLY)
2712 rte_spinlock_lock(&dev->slave_req_lock);
2714 ret = send_vhost_message(dev->slave_req_fd, msg);
2715 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
2716 rte_spinlock_unlock(&dev->slave_req_lock);
2722 * Allocate a queue pair if it hasn't been allocated yet
2725 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
2726 struct VhostUserMsg *msg)
2730 switch (msg->request.master) {
2731 case VHOST_USER_SET_VRING_KICK:
2732 case VHOST_USER_SET_VRING_CALL:
2733 case VHOST_USER_SET_VRING_ERR:
2734 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
2736 case VHOST_USER_SET_VRING_NUM:
2737 case VHOST_USER_SET_VRING_BASE:
2738 case VHOST_USER_SET_VRING_ENABLE:
2739 vring_idx = msg->payload.state.index;
2741 case VHOST_USER_SET_VRING_ADDR:
2742 vring_idx = msg->payload.addr.index;
2748 if (vring_idx >= VHOST_MAX_VRING) {
2749 VHOST_LOG_CONFIG(ERR,
2750 "invalid vring index: %u\n", vring_idx);
2754 if (dev->virtqueue[vring_idx])
2757 return alloc_vring_queue(dev, vring_idx);
2761 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
2764 unsigned int vq_num = 0;
2766 while (vq_num < dev->nr_vring) {
2767 struct vhost_virtqueue *vq = dev->virtqueue[i];
2770 rte_spinlock_lock(&vq->access_lock);
2778 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
2781 unsigned int vq_num = 0;
2783 while (vq_num < dev->nr_vring) {
2784 struct vhost_virtqueue *vq = dev->virtqueue[i];
2787 rte_spinlock_unlock(&vq->access_lock);
2795 vhost_user_msg_handler(int vid, int fd)
2797 struct virtio_net *dev;
2798 struct VhostUserMsg msg;
2799 struct rte_vdpa_device *vdpa_dev;
2801 int unlock_required = 0;
2806 dev = get_device(vid);
2810 if (!dev->notify_ops) {
2811 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2812 if (!dev->notify_ops) {
2813 VHOST_LOG_CONFIG(ERR,
2814 "failed to get callback ops for driver %s\n",
2820 ret = read_vhost_message(fd, &msg);
2823 VHOST_LOG_CONFIG(ERR,
2824 "vhost read message failed\n");
2826 VHOST_LOG_CONFIG(INFO,
2827 "vhost peer closed\n");
2833 request = msg.request.master;
2834 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2835 vhost_message_str[request]) {
2836 if (request != VHOST_USER_IOTLB_MSG)
2837 VHOST_LOG_CONFIG(INFO, "read message %s\n",
2838 vhost_message_str[request]);
2840 VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
2841 vhost_message_str[request]);
2843 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
2846 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2848 VHOST_LOG_CONFIG(ERR,
2849 "failed to alloc queue\n");
2854 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2855 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2856 * and device is destroyed. destroy_device waits for queues to be
2857 * inactive, so it is safe. Otherwise taking the access_lock
2858 * would cause a dead lock.
2861 case VHOST_USER_SET_FEATURES:
2862 case VHOST_USER_SET_PROTOCOL_FEATURES:
2863 case VHOST_USER_SET_OWNER:
2864 case VHOST_USER_SET_MEM_TABLE:
2865 case VHOST_USER_SET_LOG_BASE:
2866 case VHOST_USER_SET_LOG_FD:
2867 case VHOST_USER_SET_VRING_NUM:
2868 case VHOST_USER_SET_VRING_ADDR:
2869 case VHOST_USER_SET_VRING_BASE:
2870 case VHOST_USER_SET_VRING_KICK:
2871 case VHOST_USER_SET_VRING_CALL:
2872 case VHOST_USER_SET_VRING_ERR:
2873 case VHOST_USER_SET_VRING_ENABLE:
2874 case VHOST_USER_SEND_RARP:
2875 case VHOST_USER_NET_SET_MTU:
2876 case VHOST_USER_SET_SLAVE_REQ_FD:
2877 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2878 vhost_user_lock_all_queue_pairs(dev);
2879 unlock_required = 1;
2888 if (dev->extern_ops.pre_msg_handle) {
2889 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2892 case RTE_VHOST_MSG_RESULT_REPLY:
2893 send_vhost_reply(fd, &msg);
2895 case RTE_VHOST_MSG_RESULT_ERR:
2896 case RTE_VHOST_MSG_RESULT_OK:
2898 goto skip_to_post_handle;
2899 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2905 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2906 if (!vhost_message_handlers[request])
2907 goto skip_to_post_handle;
2908 ret = vhost_message_handlers[request](&dev, &msg, fd);
2911 case RTE_VHOST_MSG_RESULT_ERR:
2912 VHOST_LOG_CONFIG(ERR,
2913 "Processing %s failed.\n",
2914 vhost_message_str[request]);
2917 case RTE_VHOST_MSG_RESULT_OK:
2918 VHOST_LOG_CONFIG(DEBUG,
2919 "Processing %s succeeded.\n",
2920 vhost_message_str[request]);
2923 case RTE_VHOST_MSG_RESULT_REPLY:
2924 VHOST_LOG_CONFIG(DEBUG,
2925 "Processing %s succeeded and needs reply.\n",
2926 vhost_message_str[request]);
2927 send_vhost_reply(fd, &msg);
2935 skip_to_post_handle:
2936 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2937 dev->extern_ops.post_msg_handle) {
2938 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2941 case RTE_VHOST_MSG_RESULT_REPLY:
2942 send_vhost_reply(fd, &msg);
2944 case RTE_VHOST_MSG_RESULT_ERR:
2945 case RTE_VHOST_MSG_RESULT_OK:
2947 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2953 if (unlock_required)
2954 vhost_user_unlock_all_queue_pairs(dev);
2956 /* If message was not handled at this stage, treat it as an error */
2958 VHOST_LOG_CONFIG(ERR,
2959 "vhost message (req: %d) was not handled.\n", request);
2960 close_msg_fds(&msg);
2961 ret = RTE_VHOST_MSG_RESULT_ERR;
2965 * If the request required a reply that was already sent,
2966 * this optional reply-ack won't be sent as the
2967 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2969 if (msg.flags & VHOST_USER_NEED_REPLY) {
2970 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2971 msg.size = sizeof(msg.payload.u64);
2973 send_vhost_reply(fd, &msg);
2974 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2975 VHOST_LOG_CONFIG(ERR,
2976 "vhost message handling failed.\n");
2980 for (i = 0; i < dev->nr_vring; i++) {
2981 struct vhost_virtqueue *vq = dev->virtqueue[i];
2982 bool cur_ready = vq_is_ready(dev, vq);
2984 if (cur_ready != (vq && vq->ready)) {
2985 vq->ready = cur_ready;
2986 vhost_user_notify_queue_state(dev, i, cur_ready);
2991 if (!virtio_is_ready(dev))
2995 * Virtio is now ready. If not done already, it is time
2996 * to notify the application it can process the rings and
2997 * configure the vDPA device if present.
3000 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
3001 if (dev->notify_ops->new_device(dev->vid) == 0)
3002 dev->flags |= VIRTIO_DEV_RUNNING;
3005 vdpa_dev = dev->vdpa_dev;
3009 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
3010 if (vdpa_dev->ops->dev_conf(dev->vid))
3011 VHOST_LOG_CONFIG(ERR,
3012 "Failed to configure vDPA device\n");
3014 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
3021 static int process_slave_message_reply(struct virtio_net *dev,
3022 const struct VhostUserMsg *msg)
3024 struct VhostUserMsg msg_reply;
3027 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
3030 ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
3033 VHOST_LOG_CONFIG(ERR,
3034 "vhost read slave message reply failed\n");
3036 VHOST_LOG_CONFIG(INFO,
3037 "vhost peer closed\n");
3043 if (msg_reply.request.slave != msg->request.slave) {
3044 VHOST_LOG_CONFIG(ERR,
3045 "Received unexpected msg type (%u), expected %u\n",
3046 msg_reply.request.slave, msg->request.slave);
3051 ret = msg_reply.payload.u64 ? -1 : 0;
3054 rte_spinlock_unlock(&dev->slave_req_lock);
3059 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
3062 struct VhostUserMsg msg = {
3063 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
3064 .flags = VHOST_USER_VERSION,
3065 .size = sizeof(msg.payload.iotlb),
3069 .type = VHOST_IOTLB_MISS,
3073 ret = send_vhost_message(dev->slave_req_fd, &msg);
3075 VHOST_LOG_CONFIG(ERR,
3076 "Failed to send IOTLB miss message (%d)\n",
3085 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
3088 struct VhostUserMsg msg = {
3089 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
3090 .flags = VHOST_USER_VERSION,
3095 msg.flags |= VHOST_USER_NEED_REPLY;
3097 ret = send_vhost_slave_message(dev, &msg);
3099 VHOST_LOG_CONFIG(ERR,
3100 "Failed to send config change (%d)\n",
3105 return process_slave_message_reply(dev, &msg);
3109 rte_vhost_slave_config_change(int vid, bool need_reply)
3111 struct virtio_net *dev;
3113 dev = get_device(vid);
3117 return vhost_user_slave_config_change(dev, need_reply);
3120 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
3126 struct VhostUserMsg msg = {
3127 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
3128 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
3129 .size = sizeof(msg.payload.area),
3131 .u64 = index & VHOST_USER_VRING_IDX_MASK,
3138 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
3144 ret = send_vhost_slave_message(dev, &msg);
3146 VHOST_LOG_CONFIG(ERR,
3147 "Failed to set host notifier (%d)\n", ret);
3151 return process_slave_message_reply(dev, &msg);
3154 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
3156 struct virtio_net *dev;
3157 struct rte_vdpa_device *vdpa_dev;
3158 int vfio_device_fd, ret = 0;
3159 uint64_t offset, size;
3160 unsigned int i, q_start, q_last;
3162 dev = get_device(vid);
3166 vdpa_dev = dev->vdpa_dev;
3167 if (vdpa_dev == NULL)
3170 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
3171 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
3172 !(dev->protocol_features &
3173 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
3174 !(dev->protocol_features &
3175 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
3176 !(dev->protocol_features &
3177 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
3180 if (qid == RTE_VHOST_QUEUE_ALL) {
3182 q_last = dev->nr_vring - 1;
3184 if (qid >= dev->nr_vring)
3190 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
3191 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
3193 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
3194 if (vfio_device_fd < 0)
3198 for (i = q_start; i <= q_last; i++) {
3199 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
3205 if (vhost_user_slave_set_vring_host_notifier(dev, i,
3206 vfio_device_fd, offset, size) < 0) {
3213 for (i = q_start; i <= q_last; i++) {
3214 vhost_user_slave_set_vring_host_notifier(dev, i, -1,