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(NULL,
438 sizeof(struct vring_used_elem_packed),
439 RTE_CACHE_LINE_SIZE);
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(NULL,
451 vq->size * sizeof(struct vring_used_elem),
452 RTE_CACHE_LINE_SIZE);
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(NULL,
464 vq->size * sizeof(struct batch_copy_elem),
465 RTE_CACHE_LINE_SIZE);
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 vq = rte_realloc_socket(vq, sizeof(*vq), 0, node);
510 VHOST_LOG_CONFIG(ERR, "Failed to realloc virtqueue %d on node %d\n",
515 if (vq != dev->virtqueue[index]) {
516 VHOST_LOG_CONFIG(INFO, "reallocated virtqueue on node %d\n", node);
517 dev->virtqueue[index] = vq;
518 vhost_user_iotlb_init(dev, index);
521 if (vq_is_packed(dev)) {
522 struct vring_used_elem_packed *sup;
524 sup = rte_realloc_socket(vq->shadow_used_packed, vq->size * sizeof(*sup),
525 RTE_CACHE_LINE_SIZE, node);
527 VHOST_LOG_CONFIG(ERR, "Failed to realloc shadow packed on node %d\n", node);
530 vq->shadow_used_packed = sup;
532 struct vring_used_elem *sus;
534 sus = rte_realloc_socket(vq->shadow_used_split, vq->size * sizeof(*sus),
535 RTE_CACHE_LINE_SIZE, node);
537 VHOST_LOG_CONFIG(ERR, "Failed to realloc shadow split on node %d\n", node);
540 vq->shadow_used_split = sus;
543 bce = rte_realloc_socket(vq->batch_copy_elems, vq->size * sizeof(*bce),
544 RTE_CACHE_LINE_SIZE, node);
546 VHOST_LOG_CONFIG(ERR, "Failed to realloc batch copy elem on node %d\n", node);
549 vq->batch_copy_elems = bce;
552 struct log_cache_entry *lc;
554 lc = rte_realloc_socket(vq->log_cache, sizeof(*lc) * VHOST_LOG_CACHE_NR, 0, node);
556 VHOST_LOG_CONFIG(ERR, "Failed to realloc log cache on node %d\n", node);
562 if (dev->flags & VIRTIO_DEV_RUNNING)
565 ret = get_mempolicy(&dev_node, NULL, 0, dev, MPOL_F_NODE | MPOL_F_ADDR);
567 VHOST_LOG_CONFIG(ERR, "Unable to get Virtio dev %d numa information.\n", dev->vid);
571 if (dev_node == node)
574 dev = rte_realloc_socket(old_dev, sizeof(*dev), 0, node);
576 VHOST_LOG_CONFIG(ERR, "Failed to realloc dev on node %d\n", node);
580 VHOST_LOG_CONFIG(INFO, "reallocated device on node %d\n", node);
581 vhost_devices[dev->vid] = dev;
583 mem_size = sizeof(struct rte_vhost_memory) +
584 sizeof(struct rte_vhost_mem_region) * dev->mem->nregions;
585 mem = rte_realloc_socket(dev->mem, mem_size, 0, node);
587 VHOST_LOG_CONFIG(ERR, "Failed to realloc mem table on node %d\n", node);
592 gp = rte_realloc_socket(dev->guest_pages, dev->max_guest_pages * sizeof(*gp),
593 RTE_CACHE_LINE_SIZE, node);
595 VHOST_LOG_CONFIG(ERR, "Failed to realloc guest pages on node %d\n", node);
598 dev->guest_pages = gp;
603 static struct virtio_net*
604 numa_realloc(struct virtio_net *dev, int index __rte_unused)
610 /* Converts QEMU virtual address to Vhost virtual address. */
612 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
614 struct rte_vhost_mem_region *r;
617 if (unlikely(!dev || !dev->mem))
620 /* Find the region where the address lives. */
621 for (i = 0; i < dev->mem->nregions; i++) {
622 r = &dev->mem->regions[i];
624 if (qva >= r->guest_user_addr &&
625 qva < r->guest_user_addr + r->size) {
627 if (unlikely(*len > r->guest_user_addr + r->size - qva))
628 *len = r->guest_user_addr + r->size - qva;
630 return qva - r->guest_user_addr +
642 * Converts ring address to Vhost virtual address.
643 * If IOMMU is enabled, the ring address is a guest IO virtual address,
644 * else it is a QEMU virtual address.
647 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
648 uint64_t ra, uint64_t *size)
650 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
653 vhost_user_iotlb_rd_lock(vq);
654 vva = vhost_iova_to_vva(dev, vq, ra,
655 size, VHOST_ACCESS_RW);
656 vhost_user_iotlb_rd_unlock(vq);
661 return qva_to_vva(dev, ra, size);
665 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
669 vhost_user_iotlb_rd_lock(vq);
670 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
671 vhost_user_iotlb_rd_unlock(vq);
676 static struct virtio_net *
677 translate_ring_addresses(struct virtio_net *dev, int vq_index)
679 struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
680 struct vhost_vring_addr *addr = &vq->ring_addrs;
681 uint64_t len, expected_len;
683 if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
685 log_addr_to_gpa(dev, vq);
686 if (vq->log_guest_addr == 0) {
687 VHOST_LOG_CONFIG(DEBUG,
688 "(%d) failed to map log_guest_addr.\n",
694 if (vq_is_packed(dev)) {
695 len = sizeof(struct vring_packed_desc) * vq->size;
696 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
697 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
698 if (vq->desc_packed == NULL ||
699 len != sizeof(struct vring_packed_desc) *
701 VHOST_LOG_CONFIG(DEBUG,
702 "(%d) failed to map desc_packed ring.\n",
707 dev = numa_realloc(dev, vq_index);
708 vq = dev->virtqueue[vq_index];
709 addr = &vq->ring_addrs;
711 len = sizeof(struct vring_packed_desc_event);
712 vq->driver_event = (struct vring_packed_desc_event *)
713 (uintptr_t)ring_addr_to_vva(dev,
714 vq, addr->avail_user_addr, &len);
715 if (vq->driver_event == NULL ||
716 len != sizeof(struct vring_packed_desc_event)) {
717 VHOST_LOG_CONFIG(DEBUG,
718 "(%d) failed to find driver area address.\n",
723 len = sizeof(struct vring_packed_desc_event);
724 vq->device_event = (struct vring_packed_desc_event *)
725 (uintptr_t)ring_addr_to_vva(dev,
726 vq, addr->used_user_addr, &len);
727 if (vq->device_event == NULL ||
728 len != sizeof(struct vring_packed_desc_event)) {
729 VHOST_LOG_CONFIG(DEBUG,
730 "(%d) failed to find device area address.\n",
735 vq->access_ok = true;
739 /* The addresses are converted from QEMU virtual to Vhost virtual. */
740 if (vq->desc && vq->avail && vq->used)
743 len = sizeof(struct vring_desc) * vq->size;
744 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
745 vq, addr->desc_user_addr, &len);
746 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
747 VHOST_LOG_CONFIG(DEBUG,
748 "(%d) failed to map desc ring.\n",
753 dev = numa_realloc(dev, vq_index);
754 vq = dev->virtqueue[vq_index];
755 addr = &vq->ring_addrs;
757 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
758 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
759 len += sizeof(uint16_t);
761 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
762 vq, addr->avail_user_addr, &len);
763 if (vq->avail == 0 || len != expected_len) {
764 VHOST_LOG_CONFIG(DEBUG,
765 "(%d) failed to map avail ring.\n",
770 len = sizeof(struct vring_used) +
771 sizeof(struct vring_used_elem) * vq->size;
772 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
773 len += sizeof(uint16_t);
775 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
776 vq, addr->used_user_addr, &len);
777 if (vq->used == 0 || len != expected_len) {
778 VHOST_LOG_CONFIG(DEBUG,
779 "(%d) failed to map used ring.\n",
784 if (vq->last_used_idx != vq->used->idx) {
785 VHOST_LOG_CONFIG(WARNING,
786 "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
787 "some packets maybe resent for Tx and dropped for Rx\n",
788 vq->last_used_idx, vq->used->idx);
789 vq->last_used_idx = vq->used->idx;
790 vq->last_avail_idx = vq->used->idx;
793 vq->access_ok = true;
795 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
797 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
798 dev->vid, vq->avail);
799 VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
801 VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
802 dev->vid, vq->log_guest_addr);
808 * The virtio device sends us the desc, used and avail ring addresses.
809 * This function then converts these to our address space.
812 vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
813 int main_fd __rte_unused)
815 struct virtio_net *dev = *pdev;
816 struct vhost_virtqueue *vq;
817 struct vhost_vring_addr *addr = &msg->payload.addr;
820 if (validate_msg_fds(msg, 0) != 0)
821 return RTE_VHOST_MSG_RESULT_ERR;
823 if (dev->mem == NULL)
824 return RTE_VHOST_MSG_RESULT_ERR;
826 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
827 vq = dev->virtqueue[msg->payload.addr.index];
829 access_ok = vq->access_ok;
832 * Rings addresses should not be interpreted as long as the ring is not
833 * started and enabled
835 memcpy(&vq->ring_addrs, addr, sizeof(*addr));
837 vring_invalidate(dev, vq);
839 if ((vq->enabled && (dev->features &
840 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
842 dev = translate_ring_addresses(dev, msg->payload.addr.index);
844 return RTE_VHOST_MSG_RESULT_ERR;
849 return RTE_VHOST_MSG_RESULT_OK;
853 * The virtio device sends us the available ring last used index.
856 vhost_user_set_vring_base(struct virtio_net **pdev,
857 struct VhostUserMsg *msg,
858 int main_fd __rte_unused)
860 struct virtio_net *dev = *pdev;
861 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
862 uint64_t val = msg->payload.state.num;
864 if (validate_msg_fds(msg, 0) != 0)
865 return RTE_VHOST_MSG_RESULT_ERR;
867 if (vq_is_packed(dev)) {
869 * Bit[0:14]: avail index
870 * Bit[15]: avail wrap counter
872 vq->last_avail_idx = val & 0x7fff;
873 vq->avail_wrap_counter = !!(val & (0x1 << 15));
875 * Set used index to same value as available one, as
876 * their values should be the same since ring processing
877 * was stopped at get time.
879 vq->last_used_idx = vq->last_avail_idx;
880 vq->used_wrap_counter = vq->avail_wrap_counter;
882 vq->last_used_idx = msg->payload.state.num;
883 vq->last_avail_idx = msg->payload.state.num;
886 return RTE_VHOST_MSG_RESULT_OK;
890 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
891 uint64_t host_phys_addr, uint64_t size)
893 struct guest_page *page, *last_page;
894 struct guest_page *old_pages;
896 if (dev->nr_guest_pages == dev->max_guest_pages) {
897 dev->max_guest_pages *= 2;
898 old_pages = dev->guest_pages;
899 dev->guest_pages = rte_realloc(dev->guest_pages,
900 dev->max_guest_pages * sizeof(*page),
901 RTE_CACHE_LINE_SIZE);
902 if (dev->guest_pages == NULL) {
903 VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
909 if (dev->nr_guest_pages > 0) {
910 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
911 /* merge if the two pages are continuous */
912 if (host_phys_addr == last_page->host_phys_addr +
914 last_page->size += size;
919 page = &dev->guest_pages[dev->nr_guest_pages++];
920 page->guest_phys_addr = guest_phys_addr;
921 page->host_phys_addr = host_phys_addr;
928 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
931 uint64_t reg_size = reg->size;
932 uint64_t host_user_addr = reg->host_user_addr;
933 uint64_t guest_phys_addr = reg->guest_phys_addr;
934 uint64_t host_phys_addr;
937 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
938 size = page_size - (guest_phys_addr & (page_size - 1));
939 size = RTE_MIN(size, reg_size);
941 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
944 host_user_addr += size;
945 guest_phys_addr += size;
948 while (reg_size > 0) {
949 size = RTE_MIN(reg_size, page_size);
950 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
952 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
956 host_user_addr += size;
957 guest_phys_addr += size;
961 /* sort guest page array if over binary search threshold */
962 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
963 qsort((void *)dev->guest_pages, dev->nr_guest_pages,
964 sizeof(struct guest_page), guest_page_addrcmp);
970 #ifdef RTE_LIBRTE_VHOST_DEBUG
971 /* TODO: enable it only in debug mode? */
973 dump_guest_pages(struct virtio_net *dev)
976 struct guest_page *page;
978 for (i = 0; i < dev->nr_guest_pages; i++) {
979 page = &dev->guest_pages[i];
981 VHOST_LOG_CONFIG(INFO,
982 "guest physical page region %u\n"
983 "\t guest_phys_addr: %" PRIx64 "\n"
984 "\t host_phys_addr : %" PRIx64 "\n"
985 "\t size : %" PRIx64 "\n",
987 page->guest_phys_addr,
988 page->host_phys_addr,
993 #define dump_guest_pages(dev)
997 vhost_memory_changed(struct VhostUserMemory *new,
998 struct rte_vhost_memory *old)
1002 if (new->nregions != old->nregions)
1005 for (i = 0; i < new->nregions; ++i) {
1006 VhostUserMemoryRegion *new_r = &new->regions[i];
1007 struct rte_vhost_mem_region *old_r = &old->regions[i];
1009 if (new_r->guest_phys_addr != old_r->guest_phys_addr)
1011 if (new_r->memory_size != old_r->size)
1013 if (new_r->userspace_addr != old_r->guest_user_addr)
1020 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
1022 vhost_user_postcopy_region_register(struct virtio_net *dev,
1023 struct rte_vhost_mem_region *reg)
1025 struct uffdio_register reg_struct;
1028 * Let's register all the mmap'ed area to ensure
1029 * alignment on page boundary.
1031 reg_struct.range.start = (uint64_t)(uintptr_t)reg->mmap_addr;
1032 reg_struct.range.len = reg->mmap_size;
1033 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
1035 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
1037 VHOST_LOG_CONFIG(ERR, "Failed to register ufd for region "
1038 "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n",
1039 (uint64_t)reg_struct.range.start,
1040 (uint64_t)reg_struct.range.start +
1041 (uint64_t)reg_struct.range.len - 1,
1047 VHOST_LOG_CONFIG(INFO, "\t userfaultfd registered for range : %" PRIx64 " - %" PRIx64 "\n",
1048 (uint64_t)reg_struct.range.start,
1049 (uint64_t)reg_struct.range.start +
1050 (uint64_t)reg_struct.range.len - 1);
1056 vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused,
1057 struct rte_vhost_mem_region *reg __rte_unused)
1064 vhost_user_postcopy_register(struct virtio_net *dev, int main_fd,
1065 struct VhostUserMsg *msg)
1067 struct VhostUserMemory *memory;
1068 struct rte_vhost_mem_region *reg;
1069 VhostUserMsg ack_msg;
1072 if (!dev->postcopy_listening)
1076 * We haven't a better way right now than sharing
1077 * DPDK's virtual address with Qemu, so that Qemu can
1078 * retrieve the region offset when handling userfaults.
1080 memory = &msg->payload.memory;
1081 for (i = 0; i < memory->nregions; i++) {
1082 reg = &dev->mem->regions[i];
1083 memory->regions[i].userspace_addr = reg->host_user_addr;
1086 /* Send the addresses back to qemu */
1088 send_vhost_reply(main_fd, msg);
1090 /* Wait for qemu to acknolwedge it's got the addresses
1091 * we've got to wait before we're allowed to generate faults.
1093 if (read_vhost_message(main_fd, &ack_msg) <= 0) {
1094 VHOST_LOG_CONFIG(ERR,
1095 "Failed to read qemu ack on postcopy set-mem-table\n");
1099 if (validate_msg_fds(&ack_msg, 0) != 0)
1102 if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
1103 VHOST_LOG_CONFIG(ERR,
1104 "Bad qemu ack on postcopy set-mem-table (%d)\n",
1105 ack_msg.request.master);
1109 /* Now userfault register and we can use the memory */
1110 for (i = 0; i < memory->nregions; i++) {
1111 reg = &dev->mem->regions[i];
1112 if (vhost_user_postcopy_region_register(dev, reg) < 0)
1120 vhost_user_mmap_region(struct virtio_net *dev,
1121 struct rte_vhost_mem_region *region,
1122 uint64_t mmap_offset)
1129 /* Check for memory_size + mmap_offset overflow */
1130 if (mmap_offset >= -region->size) {
1131 VHOST_LOG_CONFIG(ERR,
1132 "mmap_offset (%#"PRIx64") and memory_size "
1133 "(%#"PRIx64") overflow\n",
1134 mmap_offset, region->size);
1138 mmap_size = region->size + mmap_offset;
1140 /* mmap() without flag of MAP_ANONYMOUS, should be called with length
1141 * argument aligned with hugepagesz at older longterm version Linux,
1142 * like 2.6.32 and 3.2.72, or mmap() will fail with EINVAL.
1144 * To avoid failure, make sure in caller to keep length aligned.
1146 alignment = get_blk_size(region->fd);
1147 if (alignment == (uint64_t)-1) {
1148 VHOST_LOG_CONFIG(ERR,
1149 "couldn't get hugepage size through fstat\n");
1152 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
1153 if (mmap_size == 0) {
1155 * It could happen if initial mmap_size + alignment overflows
1156 * the sizeof uint64, which could happen if either mmap_size or
1157 * alignment value is wrong.
1159 * mmap() kernel implementation would return an error, but
1160 * better catch it before and provide useful info in the logs.
1162 VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
1163 "or alignment (0x%" PRIx64 ") is invalid\n",
1164 region->size + mmap_offset, alignment);
1168 populate = dev->async_copy ? MAP_POPULATE : 0;
1169 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
1170 MAP_SHARED | populate, region->fd, 0);
1172 if (mmap_addr == MAP_FAILED) {
1173 VHOST_LOG_CONFIG(ERR, "mmap failed (%s).\n", strerror(errno));
1177 region->mmap_addr = mmap_addr;
1178 region->mmap_size = mmap_size;
1179 region->host_user_addr = (uint64_t)(uintptr_t)mmap_addr + mmap_offset;
1181 if (dev->async_copy)
1182 if (add_guest_pages(dev, region, alignment) < 0) {
1183 VHOST_LOG_CONFIG(ERR,
1184 "adding guest pages to region failed.\n");
1188 VHOST_LOG_CONFIG(INFO,
1189 "guest memory region size: 0x%" PRIx64 "\n"
1190 "\t guest physical addr: 0x%" PRIx64 "\n"
1191 "\t guest virtual addr: 0x%" PRIx64 "\n"
1192 "\t host virtual addr: 0x%" PRIx64 "\n"
1193 "\t mmap addr : 0x%" PRIx64 "\n"
1194 "\t mmap size : 0x%" PRIx64 "\n"
1195 "\t mmap align: 0x%" PRIx64 "\n"
1196 "\t mmap off : 0x%" PRIx64 "\n",
1198 region->guest_phys_addr,
1199 region->guest_user_addr,
1200 region->host_user_addr,
1201 (uint64_t)(uintptr_t)mmap_addr,
1210 vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
1213 struct virtio_net *dev = *pdev;
1214 struct VhostUserMemory *memory = &msg->payload.memory;
1215 struct rte_vhost_mem_region *reg;
1217 uint64_t mmap_offset;
1220 if (validate_msg_fds(msg, memory->nregions) != 0)
1221 return RTE_VHOST_MSG_RESULT_ERR;
1223 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
1224 VHOST_LOG_CONFIG(ERR,
1225 "too many memory regions (%u)\n", memory->nregions);
1229 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
1230 VHOST_LOG_CONFIG(INFO,
1231 "(%d) memory regions not changed\n", dev->vid);
1235 return RTE_VHOST_MSG_RESULT_OK;
1239 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
1240 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
1242 if (vdpa_dev && vdpa_dev->ops->dev_close)
1243 vdpa_dev->ops->dev_close(dev->vid);
1244 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1246 free_mem_region(dev);
1251 /* Flush IOTLB cache as previous HVAs are now invalid */
1252 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
1253 for (i = 0; i < dev->nr_vring; i++)
1254 vhost_user_iotlb_flush_all(dev->virtqueue[i]);
1256 dev->nr_guest_pages = 0;
1257 if (dev->guest_pages == NULL) {
1258 dev->max_guest_pages = 8;
1259 dev->guest_pages = rte_zmalloc(NULL,
1260 dev->max_guest_pages *
1261 sizeof(struct guest_page),
1262 RTE_CACHE_LINE_SIZE);
1263 if (dev->guest_pages == NULL) {
1264 VHOST_LOG_CONFIG(ERR,
1265 "(%d) failed to allocate memory "
1266 "for dev->guest_pages\n",
1272 dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
1273 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
1274 if (dev->mem == NULL) {
1275 VHOST_LOG_CONFIG(ERR,
1276 "(%d) failed to allocate memory for dev->mem\n",
1278 goto free_guest_pages;
1281 for (i = 0; i < memory->nregions; i++) {
1282 reg = &dev->mem->regions[i];
1284 reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
1285 reg->guest_user_addr = memory->regions[i].userspace_addr;
1286 reg->size = memory->regions[i].memory_size;
1287 reg->fd = msg->fds[i];
1290 * Assign invalid file descriptor value to avoid double
1291 * closing on error path.
1295 mmap_offset = memory->regions[i].mmap_offset;
1297 if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) {
1298 VHOST_LOG_CONFIG(ERR, "Failed to mmap region %u\n", i);
1299 goto free_mem_table;
1302 dev->mem->nregions++;
1305 if (vhost_user_postcopy_register(dev, main_fd, msg) < 0)
1306 goto free_mem_table;
1308 for (i = 0; i < dev->nr_vring; i++) {
1309 struct vhost_virtqueue *vq = dev->virtqueue[i];
1314 if (vq->desc || vq->avail || vq->used) {
1316 * If the memory table got updated, the ring addresses
1317 * need to be translated again as virtual addresses have
1320 vring_invalidate(dev, vq);
1322 dev = translate_ring_addresses(dev, i);
1325 goto free_mem_table;
1332 dump_guest_pages(dev);
1334 return RTE_VHOST_MSG_RESULT_OK;
1337 free_mem_region(dev);
1341 rte_free(dev->guest_pages);
1342 dev->guest_pages = NULL;
1345 return RTE_VHOST_MSG_RESULT_ERR;
1349 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
1356 if (vq_is_packed(dev))
1357 rings_ok = vq->desc_packed && vq->driver_event &&
1360 rings_ok = vq->desc && vq->avail && vq->used;
1363 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1364 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
1368 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u
1371 virtio_is_ready(struct virtio_net *dev)
1373 struct vhost_virtqueue *vq;
1374 uint32_t i, nr_vring = dev->nr_vring;
1376 if (dev->flags & VIRTIO_DEV_READY)
1382 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) {
1383 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
1385 if (dev->nr_vring < nr_vring)
1389 for (i = 0; i < nr_vring; i++) {
1390 vq = dev->virtqueue[i];
1392 if (!vq_is_ready(dev, vq))
1396 /* If supported, ensure the frontend is really done with config */
1397 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
1398 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
1401 dev->flags |= VIRTIO_DEV_READY;
1403 if (!(dev->flags & VIRTIO_DEV_RUNNING))
1404 VHOST_LOG_CONFIG(INFO,
1405 "virtio is now ready for processing.\n");
1410 inflight_mem_alloc(const char *name, size_t size, int *fd)
1414 char fname[20] = "/tmp/memfd-XXXXXX";
1417 #ifdef MEMFD_SUPPORTED
1418 mfd = memfd_create(name, MFD_CLOEXEC);
1423 mfd = mkstemp(fname);
1425 VHOST_LOG_CONFIG(ERR,
1426 "failed to get inflight buffer fd\n");
1433 if (ftruncate(mfd, size) == -1) {
1434 VHOST_LOG_CONFIG(ERR,
1435 "failed to alloc inflight buffer\n");
1440 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
1441 if (ptr == MAP_FAILED) {
1442 VHOST_LOG_CONFIG(ERR,
1443 "failed to mmap inflight buffer\n");
1453 get_pervq_shm_size_split(uint16_t queue_size)
1455 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
1456 queue_size + sizeof(uint64_t) +
1457 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
1461 get_pervq_shm_size_packed(uint16_t queue_size)
1463 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
1464 * queue_size + sizeof(uint64_t) +
1465 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
1466 INFLIGHT_ALIGNMENT);
1470 vhost_user_get_inflight_fd(struct virtio_net **pdev,
1472 int main_fd __rte_unused)
1474 struct rte_vhost_inflight_info_packed *inflight_packed;
1475 uint64_t pervq_inflight_size, mmap_size;
1476 uint16_t num_queues, queue_size;
1477 struct virtio_net *dev = *pdev;
1481 if (msg->size != sizeof(msg->payload.inflight)) {
1482 VHOST_LOG_CONFIG(ERR,
1483 "invalid get_inflight_fd message size is %d\n",
1485 return RTE_VHOST_MSG_RESULT_ERR;
1488 if (dev->inflight_info == NULL) {
1489 dev->inflight_info = calloc(1,
1490 sizeof(struct inflight_mem_info));
1491 if (!dev->inflight_info) {
1492 VHOST_LOG_CONFIG(ERR,
1493 "failed to alloc dev inflight area\n");
1494 return RTE_VHOST_MSG_RESULT_ERR;
1496 dev->inflight_info->fd = -1;
1499 num_queues = msg->payload.inflight.num_queues;
1500 queue_size = msg->payload.inflight.queue_size;
1502 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
1503 msg->payload.inflight.num_queues);
1504 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
1505 msg->payload.inflight.queue_size);
1507 if (vq_is_packed(dev))
1508 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1510 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1512 mmap_size = num_queues * pervq_inflight_size;
1513 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
1515 VHOST_LOG_CONFIG(ERR,
1516 "failed to alloc vhost inflight area\n");
1517 msg->payload.inflight.mmap_size = 0;
1518 return RTE_VHOST_MSG_RESULT_ERR;
1520 memset(addr, 0, mmap_size);
1522 if (dev->inflight_info->addr) {
1523 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1524 dev->inflight_info->addr = NULL;
1527 if (dev->inflight_info->fd >= 0) {
1528 close(dev->inflight_info->fd);
1529 dev->inflight_info->fd = -1;
1532 dev->inflight_info->addr = addr;
1533 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
1534 dev->inflight_info->fd = msg->fds[0] = fd;
1535 msg->payload.inflight.mmap_offset = 0;
1538 if (vq_is_packed(dev)) {
1539 for (i = 0; i < num_queues; i++) {
1541 (struct rte_vhost_inflight_info_packed *)addr;
1542 inflight_packed->used_wrap_counter = 1;
1543 inflight_packed->old_used_wrap_counter = 1;
1544 for (j = 0; j < queue_size; j++)
1545 inflight_packed->desc[j].next = j + 1;
1546 addr = (void *)((char *)addr + pervq_inflight_size);
1550 VHOST_LOG_CONFIG(INFO,
1551 "send inflight mmap_size: %"PRIu64"\n",
1552 msg->payload.inflight.mmap_size);
1553 VHOST_LOG_CONFIG(INFO,
1554 "send inflight mmap_offset: %"PRIu64"\n",
1555 msg->payload.inflight.mmap_offset);
1556 VHOST_LOG_CONFIG(INFO,
1557 "send inflight fd: %d\n", msg->fds[0]);
1559 return RTE_VHOST_MSG_RESULT_REPLY;
1563 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
1564 int main_fd __rte_unused)
1566 uint64_t mmap_size, mmap_offset;
1567 uint16_t num_queues, queue_size;
1568 struct virtio_net *dev = *pdev;
1569 uint32_t pervq_inflight_size;
1570 struct vhost_virtqueue *vq;
1575 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
1576 VHOST_LOG_CONFIG(ERR,
1577 "invalid set_inflight_fd message size is %d,fd is %d\n",
1579 return RTE_VHOST_MSG_RESULT_ERR;
1582 mmap_size = msg->payload.inflight.mmap_size;
1583 mmap_offset = msg->payload.inflight.mmap_offset;
1584 num_queues = msg->payload.inflight.num_queues;
1585 queue_size = msg->payload.inflight.queue_size;
1587 if (vq_is_packed(dev))
1588 pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
1590 pervq_inflight_size = get_pervq_shm_size_split(queue_size);
1592 VHOST_LOG_CONFIG(INFO,
1593 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
1594 VHOST_LOG_CONFIG(INFO,
1595 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
1596 VHOST_LOG_CONFIG(INFO,
1597 "set_inflight_fd num_queues: %u\n", num_queues);
1598 VHOST_LOG_CONFIG(INFO,
1599 "set_inflight_fd queue_size: %u\n", queue_size);
1600 VHOST_LOG_CONFIG(INFO,
1601 "set_inflight_fd fd: %d\n", fd);
1602 VHOST_LOG_CONFIG(INFO,
1603 "set_inflight_fd pervq_inflight_size: %d\n",
1604 pervq_inflight_size);
1606 if (!dev->inflight_info) {
1607 dev->inflight_info = calloc(1,
1608 sizeof(struct inflight_mem_info));
1609 if (dev->inflight_info == NULL) {
1610 VHOST_LOG_CONFIG(ERR,
1611 "failed to alloc dev inflight area\n");
1612 return RTE_VHOST_MSG_RESULT_ERR;
1614 dev->inflight_info->fd = -1;
1617 if (dev->inflight_info->addr) {
1618 munmap(dev->inflight_info->addr, dev->inflight_info->size);
1619 dev->inflight_info->addr = NULL;
1622 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
1624 if (addr == MAP_FAILED) {
1625 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
1626 return RTE_VHOST_MSG_RESULT_ERR;
1629 if (dev->inflight_info->fd >= 0) {
1630 close(dev->inflight_info->fd);
1631 dev->inflight_info->fd = -1;
1634 dev->inflight_info->fd = fd;
1635 dev->inflight_info->addr = addr;
1636 dev->inflight_info->size = mmap_size;
1638 for (i = 0; i < num_queues; i++) {
1639 vq = dev->virtqueue[i];
1643 if (vq_is_packed(dev)) {
1644 vq->inflight_packed = addr;
1645 vq->inflight_packed->desc_num = queue_size;
1647 vq->inflight_split = addr;
1648 vq->inflight_split->desc_num = queue_size;
1650 addr = (void *)((char *)addr + pervq_inflight_size);
1653 return RTE_VHOST_MSG_RESULT_OK;
1657 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
1658 int main_fd __rte_unused)
1660 struct virtio_net *dev = *pdev;
1661 struct vhost_vring_file file;
1662 struct vhost_virtqueue *vq;
1665 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1666 if (validate_msg_fds(msg, expected_fds) != 0)
1667 return RTE_VHOST_MSG_RESULT_ERR;
1669 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1670 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1671 file.fd = VIRTIO_INVALID_EVENTFD;
1673 file.fd = msg->fds[0];
1674 VHOST_LOG_CONFIG(INFO,
1675 "vring call idx:%d file:%d\n", file.index, file.fd);
1677 vq = dev->virtqueue[file.index];
1681 vhost_user_notify_queue_state(dev, file.index, 0);
1684 if (vq->callfd >= 0)
1687 vq->callfd = file.fd;
1689 return RTE_VHOST_MSG_RESULT_OK;
1692 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
1693 struct VhostUserMsg *msg,
1694 int main_fd __rte_unused)
1698 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1699 if (validate_msg_fds(msg, expected_fds) != 0)
1700 return RTE_VHOST_MSG_RESULT_ERR;
1702 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1704 VHOST_LOG_CONFIG(INFO, "not implemented\n");
1706 return RTE_VHOST_MSG_RESULT_OK;
1710 resubmit_desc_compare(const void *a, const void *b)
1712 const struct rte_vhost_resubmit_desc *desc0 = a;
1713 const struct rte_vhost_resubmit_desc *desc1 = b;
1715 if (desc1->counter > desc0->counter)
1722 vhost_check_queue_inflights_split(struct virtio_net *dev,
1723 struct vhost_virtqueue *vq)
1726 uint16_t resubmit_num = 0, last_io, num;
1727 struct vring_used *used = vq->used;
1728 struct rte_vhost_resubmit_info *resubmit;
1729 struct rte_vhost_inflight_info_split *inflight_split;
1731 if (!(dev->protocol_features &
1732 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1733 return RTE_VHOST_MSG_RESULT_OK;
1735 /* The frontend may still not support the inflight feature
1736 * although we negotiate the protocol feature.
1738 if ((!vq->inflight_split))
1739 return RTE_VHOST_MSG_RESULT_OK;
1741 if (!vq->inflight_split->version) {
1742 vq->inflight_split->version = INFLIGHT_VERSION;
1743 return RTE_VHOST_MSG_RESULT_OK;
1746 if (vq->resubmit_inflight)
1747 return RTE_VHOST_MSG_RESULT_OK;
1749 inflight_split = vq->inflight_split;
1750 vq->global_counter = 0;
1751 last_io = inflight_split->last_inflight_io;
1753 if (inflight_split->used_idx != used->idx) {
1754 inflight_split->desc[last_io].inflight = 0;
1755 rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
1756 inflight_split->used_idx = used->idx;
1759 for (i = 0; i < inflight_split->desc_num; i++) {
1760 if (inflight_split->desc[i].inflight == 1)
1764 vq->last_avail_idx += resubmit_num;
1767 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1769 VHOST_LOG_CONFIG(ERR,
1770 "failed to allocate memory for resubmit info.\n");
1771 return RTE_VHOST_MSG_RESULT_ERR;
1774 resubmit->resubmit_list = calloc(resubmit_num,
1775 sizeof(struct rte_vhost_resubmit_desc));
1776 if (!resubmit->resubmit_list) {
1777 VHOST_LOG_CONFIG(ERR,
1778 "failed to allocate memory for inflight desc.\n");
1780 return RTE_VHOST_MSG_RESULT_ERR;
1784 for (i = 0; i < vq->inflight_split->desc_num; i++) {
1785 if (vq->inflight_split->desc[i].inflight == 1) {
1786 resubmit->resubmit_list[num].index = i;
1787 resubmit->resubmit_list[num].counter =
1788 inflight_split->desc[i].counter;
1792 resubmit->resubmit_num = num;
1794 if (resubmit->resubmit_num > 1)
1795 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1796 sizeof(struct rte_vhost_resubmit_desc),
1797 resubmit_desc_compare);
1799 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1800 vq->resubmit_inflight = resubmit;
1803 return RTE_VHOST_MSG_RESULT_OK;
1807 vhost_check_queue_inflights_packed(struct virtio_net *dev,
1808 struct vhost_virtqueue *vq)
1811 uint16_t resubmit_num = 0, old_used_idx, num;
1812 struct rte_vhost_resubmit_info *resubmit;
1813 struct rte_vhost_inflight_info_packed *inflight_packed;
1815 if (!(dev->protocol_features &
1816 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
1817 return RTE_VHOST_MSG_RESULT_OK;
1819 /* The frontend may still not support the inflight feature
1820 * although we negotiate the protocol feature.
1822 if ((!vq->inflight_packed))
1823 return RTE_VHOST_MSG_RESULT_OK;
1825 if (!vq->inflight_packed->version) {
1826 vq->inflight_packed->version = INFLIGHT_VERSION;
1827 return RTE_VHOST_MSG_RESULT_OK;
1830 if (vq->resubmit_inflight)
1831 return RTE_VHOST_MSG_RESULT_OK;
1833 inflight_packed = vq->inflight_packed;
1834 vq->global_counter = 0;
1835 old_used_idx = inflight_packed->old_used_idx;
1837 if (inflight_packed->used_idx != old_used_idx) {
1838 if (inflight_packed->desc[old_used_idx].inflight == 0) {
1839 inflight_packed->old_used_idx =
1840 inflight_packed->used_idx;
1841 inflight_packed->old_used_wrap_counter =
1842 inflight_packed->used_wrap_counter;
1843 inflight_packed->old_free_head =
1844 inflight_packed->free_head;
1846 inflight_packed->used_idx =
1847 inflight_packed->old_used_idx;
1848 inflight_packed->used_wrap_counter =
1849 inflight_packed->old_used_wrap_counter;
1850 inflight_packed->free_head =
1851 inflight_packed->old_free_head;
1855 for (i = 0; i < inflight_packed->desc_num; i++) {
1856 if (inflight_packed->desc[i].inflight == 1)
1861 resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
1862 if (resubmit == NULL) {
1863 VHOST_LOG_CONFIG(ERR,
1864 "failed to allocate memory for resubmit info.\n");
1865 return RTE_VHOST_MSG_RESULT_ERR;
1868 resubmit->resubmit_list = calloc(resubmit_num,
1869 sizeof(struct rte_vhost_resubmit_desc));
1870 if (resubmit->resubmit_list == NULL) {
1871 VHOST_LOG_CONFIG(ERR,
1872 "failed to allocate memory for resubmit desc.\n");
1874 return RTE_VHOST_MSG_RESULT_ERR;
1878 for (i = 0; i < inflight_packed->desc_num; i++) {
1879 if (vq->inflight_packed->desc[i].inflight == 1) {
1880 resubmit->resubmit_list[num].index = i;
1881 resubmit->resubmit_list[num].counter =
1882 inflight_packed->desc[i].counter;
1886 resubmit->resubmit_num = num;
1888 if (resubmit->resubmit_num > 1)
1889 qsort(resubmit->resubmit_list, resubmit->resubmit_num,
1890 sizeof(struct rte_vhost_resubmit_desc),
1891 resubmit_desc_compare);
1893 vq->global_counter = resubmit->resubmit_list[0].counter + 1;
1894 vq->resubmit_inflight = resubmit;
1897 return RTE_VHOST_MSG_RESULT_OK;
1901 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
1902 int main_fd __rte_unused)
1904 struct virtio_net *dev = *pdev;
1905 struct vhost_vring_file file;
1906 struct vhost_virtqueue *vq;
1909 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
1910 if (validate_msg_fds(msg, expected_fds) != 0)
1911 return RTE_VHOST_MSG_RESULT_ERR;
1913 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1914 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
1915 file.fd = VIRTIO_INVALID_EVENTFD;
1917 file.fd = msg->fds[0];
1918 VHOST_LOG_CONFIG(INFO,
1919 "vring kick idx:%d file:%d\n", file.index, file.fd);
1921 /* Interpret ring addresses only when ring is started. */
1922 dev = translate_ring_addresses(dev, file.index);
1924 if (file.fd != VIRTIO_INVALID_EVENTFD)
1927 return RTE_VHOST_MSG_RESULT_ERR;
1932 vq = dev->virtqueue[file.index];
1935 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
1936 * the ring starts already enabled. Otherwise, it is enabled via
1937 * the SET_VRING_ENABLE message.
1939 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
1945 vhost_user_notify_queue_state(dev, file.index, 0);
1948 if (vq->kickfd >= 0)
1950 vq->kickfd = file.fd;
1952 if (vq_is_packed(dev)) {
1953 if (vhost_check_queue_inflights_packed(dev, vq)) {
1954 VHOST_LOG_CONFIG(ERR,
1955 "failed to inflights for vq: %d\n", file.index);
1956 return RTE_VHOST_MSG_RESULT_ERR;
1959 if (vhost_check_queue_inflights_split(dev, vq)) {
1960 VHOST_LOG_CONFIG(ERR,
1961 "failed to inflights for vq: %d\n", file.index);
1962 return RTE_VHOST_MSG_RESULT_ERR;
1966 return RTE_VHOST_MSG_RESULT_OK;
1970 * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
1973 vhost_user_get_vring_base(struct virtio_net **pdev,
1974 struct VhostUserMsg *msg,
1975 int main_fd __rte_unused)
1977 struct virtio_net *dev = *pdev;
1978 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
1981 if (validate_msg_fds(msg, 0) != 0)
1982 return RTE_VHOST_MSG_RESULT_ERR;
1984 /* We have to stop the queue (virtio) if it is running. */
1985 vhost_destroy_device_notify(dev);
1987 dev->flags &= ~VIRTIO_DEV_READY;
1988 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
1990 /* Here we are safe to get the indexes */
1991 if (vq_is_packed(dev)) {
1993 * Bit[0:14]: avail index
1994 * Bit[15]: avail wrap counter
1996 val = vq->last_avail_idx & 0x7fff;
1997 val |= vq->avail_wrap_counter << 15;
1998 msg->payload.state.num = val;
2000 msg->payload.state.num = vq->last_avail_idx;
2003 VHOST_LOG_CONFIG(INFO,
2004 "vring base idx:%d file:%d\n", msg->payload.state.index,
2005 msg->payload.state.num);
2007 * Based on current qemu vhost-user implementation, this message is
2008 * sent and only sent in vhost_vring_stop.
2009 * TODO: cleanup the vring, it isn't usable since here.
2011 if (vq->kickfd >= 0)
2014 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
2016 if (vq->callfd >= 0)
2019 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
2021 vq->signalled_used_valid = false;
2023 if (vq_is_packed(dev)) {
2024 rte_free(vq->shadow_used_packed);
2025 vq->shadow_used_packed = NULL;
2027 rte_free(vq->shadow_used_split);
2028 vq->shadow_used_split = NULL;
2031 rte_free(vq->batch_copy_elems);
2032 vq->batch_copy_elems = NULL;
2034 rte_free(vq->log_cache);
2035 vq->log_cache = NULL;
2037 msg->size = sizeof(msg->payload.state);
2040 vring_invalidate(dev, vq);
2042 return RTE_VHOST_MSG_RESULT_REPLY;
2046 * when virtio queues are ready to work, qemu will send us to
2047 * enable the virtio queue pair.
2050 vhost_user_set_vring_enable(struct virtio_net **pdev,
2051 struct VhostUserMsg *msg,
2052 int main_fd __rte_unused)
2054 struct virtio_net *dev = *pdev;
2055 bool enable = !!msg->payload.state.num;
2056 int index = (int)msg->payload.state.index;
2058 if (validate_msg_fds(msg, 0) != 0)
2059 return RTE_VHOST_MSG_RESULT_ERR;
2061 VHOST_LOG_CONFIG(INFO,
2062 "set queue enable: %d to qp idx: %d\n",
2065 if (enable && dev->virtqueue[index]->async_registered) {
2066 if (dev->virtqueue[index]->async_pkts_inflight_n) {
2067 VHOST_LOG_CONFIG(ERR, "failed to enable vring. "
2068 "async inflight packets must be completed first\n");
2069 return RTE_VHOST_MSG_RESULT_ERR;
2073 dev->virtqueue[index]->enabled = enable;
2075 return RTE_VHOST_MSG_RESULT_OK;
2079 vhost_user_get_protocol_features(struct virtio_net **pdev,
2080 struct VhostUserMsg *msg,
2081 int main_fd __rte_unused)
2083 struct virtio_net *dev = *pdev;
2084 uint64_t features, protocol_features;
2086 if (validate_msg_fds(msg, 0) != 0)
2087 return RTE_VHOST_MSG_RESULT_ERR;
2089 rte_vhost_driver_get_features(dev->ifname, &features);
2090 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
2092 msg->payload.u64 = protocol_features;
2093 msg->size = sizeof(msg->payload.u64);
2096 return RTE_VHOST_MSG_RESULT_REPLY;
2100 vhost_user_set_protocol_features(struct virtio_net **pdev,
2101 struct VhostUserMsg *msg,
2102 int main_fd __rte_unused)
2104 struct virtio_net *dev = *pdev;
2105 uint64_t protocol_features = msg->payload.u64;
2106 uint64_t slave_protocol_features = 0;
2108 if (validate_msg_fds(msg, 0) != 0)
2109 return RTE_VHOST_MSG_RESULT_ERR;
2111 rte_vhost_driver_get_protocol_features(dev->ifname,
2112 &slave_protocol_features);
2113 if (protocol_features & ~slave_protocol_features) {
2114 VHOST_LOG_CONFIG(ERR,
2115 "(%d) received invalid protocol features.\n",
2117 return RTE_VHOST_MSG_RESULT_ERR;
2120 dev->protocol_features = protocol_features;
2121 VHOST_LOG_CONFIG(INFO,
2122 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
2123 dev->protocol_features);
2125 return RTE_VHOST_MSG_RESULT_OK;
2129 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
2130 int main_fd __rte_unused)
2132 struct virtio_net *dev = *pdev;
2133 int fd = msg->fds[0];
2138 if (validate_msg_fds(msg, 1) != 0)
2139 return RTE_VHOST_MSG_RESULT_ERR;
2142 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
2143 return RTE_VHOST_MSG_RESULT_ERR;
2146 if (msg->size != sizeof(VhostUserLog)) {
2147 VHOST_LOG_CONFIG(ERR,
2148 "invalid log base msg size: %"PRId32" != %d\n",
2149 msg->size, (int)sizeof(VhostUserLog));
2153 size = msg->payload.log.mmap_size;
2154 off = msg->payload.log.mmap_offset;
2156 /* Check for mmap size and offset overflow. */
2158 VHOST_LOG_CONFIG(ERR,
2159 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
2164 VHOST_LOG_CONFIG(INFO,
2165 "log mmap size: %"PRId64", offset: %"PRId64"\n",
2169 * mmap from 0 to workaround a hugepage mmap bug: mmap will
2170 * fail when offset is not page size aligned.
2172 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
2174 if (addr == MAP_FAILED) {
2175 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
2176 return RTE_VHOST_MSG_RESULT_ERR;
2180 * Free previously mapped log memory on occasionally
2181 * multiple VHOST_USER_SET_LOG_BASE.
2183 if (dev->log_addr) {
2184 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
2186 dev->log_addr = (uint64_t)(uintptr_t)addr;
2187 dev->log_base = dev->log_addr + off;
2188 dev->log_size = size;
2190 for (i = 0; i < dev->nr_vring; i++) {
2191 struct vhost_virtqueue *vq = dev->virtqueue[i];
2193 rte_free(vq->log_cache);
2194 vq->log_cache = NULL;
2195 vq->log_cache_nb_elem = 0;
2196 vq->log_cache = rte_zmalloc("vq log cache",
2197 sizeof(struct log_cache_entry) * VHOST_LOG_CACHE_NR,
2200 * If log cache alloc fail, don't fail migration, but no
2201 * caching will be done, which will impact performance
2204 VHOST_LOG_CONFIG(ERR, "Failed to allocate VQ logging cache\n");
2208 * The spec is not clear about it (yet), but QEMU doesn't expect
2209 * any payload in the reply.
2214 return RTE_VHOST_MSG_RESULT_REPLY;
2218 return RTE_VHOST_MSG_RESULT_ERR;
2221 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
2222 struct VhostUserMsg *msg,
2223 int main_fd __rte_unused)
2225 if (validate_msg_fds(msg, 1) != 0)
2226 return RTE_VHOST_MSG_RESULT_ERR;
2229 VHOST_LOG_CONFIG(INFO, "not implemented.\n");
2231 return RTE_VHOST_MSG_RESULT_OK;
2235 * An rarp packet is constructed and broadcasted to notify switches about
2236 * the new location of the migrated VM, so that packets from outside will
2237 * not be lost after migration.
2239 * However, we don't actually "send" a rarp packet here, instead, we set
2240 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
2243 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
2244 int main_fd __rte_unused)
2246 struct virtio_net *dev = *pdev;
2247 uint8_t *mac = (uint8_t *)&msg->payload.u64;
2248 struct rte_vdpa_device *vdpa_dev;
2250 if (validate_msg_fds(msg, 0) != 0)
2251 return RTE_VHOST_MSG_RESULT_ERR;
2253 VHOST_LOG_CONFIG(DEBUG,
2254 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
2255 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2256 memcpy(dev->mac.addr_bytes, mac, 6);
2259 * Set the flag to inject a RARP broadcast packet at
2260 * rte_vhost_dequeue_burst().
2262 * __ATOMIC_RELEASE ordering is for making sure the mac is
2263 * copied before the flag is set.
2265 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
2266 vdpa_dev = dev->vdpa_dev;
2267 if (vdpa_dev && vdpa_dev->ops->migration_done)
2268 vdpa_dev->ops->migration_done(dev->vid);
2270 return RTE_VHOST_MSG_RESULT_OK;
2274 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
2275 int main_fd __rte_unused)
2277 struct virtio_net *dev = *pdev;
2279 if (validate_msg_fds(msg, 0) != 0)
2280 return RTE_VHOST_MSG_RESULT_ERR;
2282 if (msg->payload.u64 < VIRTIO_MIN_MTU ||
2283 msg->payload.u64 > VIRTIO_MAX_MTU) {
2284 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
2287 return RTE_VHOST_MSG_RESULT_ERR;
2290 dev->mtu = msg->payload.u64;
2292 return RTE_VHOST_MSG_RESULT_OK;
2296 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
2297 int main_fd __rte_unused)
2299 struct virtio_net *dev = *pdev;
2300 int fd = msg->fds[0];
2302 if (validate_msg_fds(msg, 1) != 0)
2303 return RTE_VHOST_MSG_RESULT_ERR;
2306 VHOST_LOG_CONFIG(ERR,
2307 "Invalid file descriptor for slave channel (%d)\n",
2309 return RTE_VHOST_MSG_RESULT_ERR;
2312 if (dev->slave_req_fd >= 0)
2313 close(dev->slave_req_fd);
2315 dev->slave_req_fd = fd;
2317 return RTE_VHOST_MSG_RESULT_OK;
2321 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2323 struct vhost_vring_addr *ra;
2324 uint64_t start, end, len;
2327 end = start + imsg->size;
2329 ra = &vq->ring_addrs;
2330 len = sizeof(struct vring_desc) * vq->size;
2331 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2334 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
2335 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2338 len = sizeof(struct vring_used) +
2339 sizeof(struct vring_used_elem) * vq->size;
2340 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2343 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2344 len = sizeof(uint64_t);
2345 if (ra->log_guest_addr < end &&
2346 (ra->log_guest_addr + len) > start)
2354 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
2356 struct vhost_vring_addr *ra;
2357 uint64_t start, end, len;
2360 end = start + imsg->size;
2362 ra = &vq->ring_addrs;
2363 len = sizeof(struct vring_packed_desc) * vq->size;
2364 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
2367 len = sizeof(struct vring_packed_desc_event);
2368 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
2371 len = sizeof(struct vring_packed_desc_event);
2372 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
2375 if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
2376 len = sizeof(uint64_t);
2377 if (ra->log_guest_addr < end &&
2378 (ra->log_guest_addr + len) > start)
2385 static int is_vring_iotlb(struct virtio_net *dev,
2386 struct vhost_virtqueue *vq,
2387 struct vhost_iotlb_msg *imsg)
2389 if (vq_is_packed(dev))
2390 return is_vring_iotlb_packed(vq, imsg);
2392 return is_vring_iotlb_split(vq, imsg);
2396 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
2397 int main_fd __rte_unused)
2399 struct virtio_net *dev = *pdev;
2400 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
2404 if (validate_msg_fds(msg, 0) != 0)
2405 return RTE_VHOST_MSG_RESULT_ERR;
2407 switch (imsg->type) {
2408 case VHOST_IOTLB_UPDATE:
2410 vva = qva_to_vva(dev, imsg->uaddr, &len);
2412 return RTE_VHOST_MSG_RESULT_ERR;
2414 for (i = 0; i < dev->nr_vring; i++) {
2415 struct vhost_virtqueue *vq = dev->virtqueue[i];
2420 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
2423 if (is_vring_iotlb(dev, vq, imsg))
2424 *pdev = dev = translate_ring_addresses(dev, i);
2427 case VHOST_IOTLB_INVALIDATE:
2428 for (i = 0; i < dev->nr_vring; i++) {
2429 struct vhost_virtqueue *vq = dev->virtqueue[i];
2434 vhost_user_iotlb_cache_remove(vq, imsg->iova,
2437 if (is_vring_iotlb(dev, vq, imsg))
2438 vring_invalidate(dev, vq);
2442 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
2444 return RTE_VHOST_MSG_RESULT_ERR;
2447 return RTE_VHOST_MSG_RESULT_OK;
2451 vhost_user_set_postcopy_advise(struct virtio_net **pdev,
2452 struct VhostUserMsg *msg,
2453 int main_fd __rte_unused)
2455 struct virtio_net *dev = *pdev;
2456 #ifdef RTE_LIBRTE_VHOST_POSTCOPY
2457 struct uffdio_api api_struct;
2459 if (validate_msg_fds(msg, 0) != 0)
2460 return RTE_VHOST_MSG_RESULT_ERR;
2462 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
2464 if (dev->postcopy_ufd == -1) {
2465 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
2467 return RTE_VHOST_MSG_RESULT_ERR;
2469 api_struct.api = UFFD_API;
2470 api_struct.features = 0;
2471 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
2472 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
2474 close(dev->postcopy_ufd);
2475 dev->postcopy_ufd = -1;
2476 return RTE_VHOST_MSG_RESULT_ERR;
2478 msg->fds[0] = dev->postcopy_ufd;
2481 return RTE_VHOST_MSG_RESULT_REPLY;
2483 dev->postcopy_ufd = -1;
2486 return RTE_VHOST_MSG_RESULT_ERR;
2491 vhost_user_set_postcopy_listen(struct virtio_net **pdev,
2492 struct VhostUserMsg *msg __rte_unused,
2493 int main_fd __rte_unused)
2495 struct virtio_net *dev = *pdev;
2497 if (validate_msg_fds(msg, 0) != 0)
2498 return RTE_VHOST_MSG_RESULT_ERR;
2500 if (dev->mem && dev->mem->nregions) {
2501 VHOST_LOG_CONFIG(ERR,
2502 "Regions already registered at postcopy-listen\n");
2503 return RTE_VHOST_MSG_RESULT_ERR;
2505 dev->postcopy_listening = 1;
2507 return RTE_VHOST_MSG_RESULT_OK;
2511 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
2512 int main_fd __rte_unused)
2514 struct virtio_net *dev = *pdev;
2516 if (validate_msg_fds(msg, 0) != 0)
2517 return RTE_VHOST_MSG_RESULT_ERR;
2519 dev->postcopy_listening = 0;
2520 if (dev->postcopy_ufd >= 0) {
2521 close(dev->postcopy_ufd);
2522 dev->postcopy_ufd = -1;
2525 msg->payload.u64 = 0;
2526 msg->size = sizeof(msg->payload.u64);
2529 return RTE_VHOST_MSG_RESULT_REPLY;
2533 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2534 int main_fd __rte_unused)
2536 struct virtio_net *dev = *pdev;
2538 if (validate_msg_fds(msg, 0) != 0)
2539 return RTE_VHOST_MSG_RESULT_ERR;
2541 msg->payload.u64 = dev->status;
2542 msg->size = sizeof(msg->payload.u64);
2545 return RTE_VHOST_MSG_RESULT_REPLY;
2549 vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
2550 int main_fd __rte_unused)
2552 struct virtio_net *dev = *pdev;
2554 if (validate_msg_fds(msg, 0) != 0)
2555 return RTE_VHOST_MSG_RESULT_ERR;
2557 /* As per Virtio specification, the device status is 8bits long */
2558 if (msg->payload.u64 > UINT8_MAX) {
2559 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
2561 return RTE_VHOST_MSG_RESULT_ERR;
2564 dev->status = msg->payload.u64;
2566 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
2567 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
2568 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
2570 * Clear the bit to let the driver know about the feature
2571 * negotiation failure
2573 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
2576 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
2578 "\t-ACKNOWLEDGE: %u\n"
2580 "\t-FEATURES_OK: %u\n"
2581 "\t-DRIVER_OK: %u\n"
2582 "\t-DEVICE_NEED_RESET: %u\n"
2585 (dev->status == VIRTIO_DEVICE_STATUS_RESET),
2586 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
2587 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
2588 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
2589 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
2590 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
2591 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
2593 return RTE_VHOST_MSG_RESULT_OK;
2596 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
2597 struct VhostUserMsg *msg,
2599 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
2600 [VHOST_USER_NONE] = NULL,
2601 [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
2602 [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
2603 [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
2604 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
2605 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
2606 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
2607 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
2608 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
2609 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
2610 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
2611 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
2612 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
2613 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
2614 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
2615 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
2616 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
2617 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
2618 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
2619 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
2620 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
2621 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
2622 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
2623 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
2624 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
2625 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
2626 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
2627 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
2628 [VHOST_USER_SET_STATUS] = vhost_user_set_status,
2629 [VHOST_USER_GET_STATUS] = vhost_user_get_status,
2632 /* return bytes# of read on success or negative val on failure. */
2634 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
2638 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
2639 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
2642 } else if (ret != VHOST_USER_HDR_SIZE) {
2643 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
2649 if (msg->size > sizeof(msg->payload)) {
2650 VHOST_LOG_CONFIG(ERR,
2651 "invalid msg size: %d\n", msg->size);
2654 ret = read(sockfd, &msg->payload, msg->size);
2657 if (ret != (int)msg->size) {
2658 VHOST_LOG_CONFIG(ERR,
2659 "read control message failed\n");
2668 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
2673 return send_fd_message(sockfd, (char *)msg,
2674 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
2678 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
2683 msg->flags &= ~VHOST_USER_VERSION_MASK;
2684 msg->flags &= ~VHOST_USER_NEED_REPLY;
2685 msg->flags |= VHOST_USER_VERSION;
2686 msg->flags |= VHOST_USER_REPLY_MASK;
2688 return send_vhost_message(sockfd, msg);
2692 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
2696 if (msg->flags & VHOST_USER_NEED_REPLY)
2697 rte_spinlock_lock(&dev->slave_req_lock);
2699 ret = send_vhost_message(dev->slave_req_fd, msg);
2700 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
2701 rte_spinlock_unlock(&dev->slave_req_lock);
2707 * Allocate a queue pair if it hasn't been allocated yet
2710 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
2711 struct VhostUserMsg *msg)
2715 switch (msg->request.master) {
2716 case VHOST_USER_SET_VRING_KICK:
2717 case VHOST_USER_SET_VRING_CALL:
2718 case VHOST_USER_SET_VRING_ERR:
2719 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
2721 case VHOST_USER_SET_VRING_NUM:
2722 case VHOST_USER_SET_VRING_BASE:
2723 case VHOST_USER_SET_VRING_ENABLE:
2724 vring_idx = msg->payload.state.index;
2726 case VHOST_USER_SET_VRING_ADDR:
2727 vring_idx = msg->payload.addr.index;
2733 if (vring_idx >= VHOST_MAX_VRING) {
2734 VHOST_LOG_CONFIG(ERR,
2735 "invalid vring index: %u\n", vring_idx);
2739 if (dev->virtqueue[vring_idx])
2742 return alloc_vring_queue(dev, vring_idx);
2746 vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
2749 unsigned int vq_num = 0;
2751 while (vq_num < dev->nr_vring) {
2752 struct vhost_virtqueue *vq = dev->virtqueue[i];
2755 rte_spinlock_lock(&vq->access_lock);
2763 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
2766 unsigned int vq_num = 0;
2768 while (vq_num < dev->nr_vring) {
2769 struct vhost_virtqueue *vq = dev->virtqueue[i];
2772 rte_spinlock_unlock(&vq->access_lock);
2780 vhost_user_msg_handler(int vid, int fd)
2782 struct virtio_net *dev;
2783 struct VhostUserMsg msg;
2784 struct rte_vdpa_device *vdpa_dev;
2786 int unlock_required = 0;
2791 dev = get_device(vid);
2795 if (!dev->notify_ops) {
2796 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
2797 if (!dev->notify_ops) {
2798 VHOST_LOG_CONFIG(ERR,
2799 "failed to get callback ops for driver %s\n",
2805 ret = read_vhost_message(fd, &msg);
2808 VHOST_LOG_CONFIG(ERR,
2809 "vhost read message failed\n");
2811 VHOST_LOG_CONFIG(INFO,
2812 "vhost peer closed\n");
2818 request = msg.request.master;
2819 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
2820 vhost_message_str[request]) {
2821 if (request != VHOST_USER_IOTLB_MSG)
2822 VHOST_LOG_CONFIG(INFO, "read message %s\n",
2823 vhost_message_str[request]);
2825 VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
2826 vhost_message_str[request]);
2828 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
2831 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
2833 VHOST_LOG_CONFIG(ERR,
2834 "failed to alloc queue\n");
2839 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
2840 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
2841 * and device is destroyed. destroy_device waits for queues to be
2842 * inactive, so it is safe. Otherwise taking the access_lock
2843 * would cause a dead lock.
2846 case VHOST_USER_SET_FEATURES:
2847 case VHOST_USER_SET_PROTOCOL_FEATURES:
2848 case VHOST_USER_SET_OWNER:
2849 case VHOST_USER_SET_MEM_TABLE:
2850 case VHOST_USER_SET_LOG_BASE:
2851 case VHOST_USER_SET_LOG_FD:
2852 case VHOST_USER_SET_VRING_NUM:
2853 case VHOST_USER_SET_VRING_ADDR:
2854 case VHOST_USER_SET_VRING_BASE:
2855 case VHOST_USER_SET_VRING_KICK:
2856 case VHOST_USER_SET_VRING_CALL:
2857 case VHOST_USER_SET_VRING_ERR:
2858 case VHOST_USER_SET_VRING_ENABLE:
2859 case VHOST_USER_SEND_RARP:
2860 case VHOST_USER_NET_SET_MTU:
2861 case VHOST_USER_SET_SLAVE_REQ_FD:
2862 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2863 vhost_user_lock_all_queue_pairs(dev);
2864 unlock_required = 1;
2873 if (dev->extern_ops.pre_msg_handle) {
2874 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
2877 case RTE_VHOST_MSG_RESULT_REPLY:
2878 send_vhost_reply(fd, &msg);
2880 case RTE_VHOST_MSG_RESULT_ERR:
2881 case RTE_VHOST_MSG_RESULT_OK:
2883 goto skip_to_post_handle;
2884 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2890 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
2891 if (!vhost_message_handlers[request])
2892 goto skip_to_post_handle;
2893 ret = vhost_message_handlers[request](&dev, &msg, fd);
2896 case RTE_VHOST_MSG_RESULT_ERR:
2897 VHOST_LOG_CONFIG(ERR,
2898 "Processing %s failed.\n",
2899 vhost_message_str[request]);
2902 case RTE_VHOST_MSG_RESULT_OK:
2903 VHOST_LOG_CONFIG(DEBUG,
2904 "Processing %s succeeded.\n",
2905 vhost_message_str[request]);
2908 case RTE_VHOST_MSG_RESULT_REPLY:
2909 VHOST_LOG_CONFIG(DEBUG,
2910 "Processing %s succeeded and needs reply.\n",
2911 vhost_message_str[request]);
2912 send_vhost_reply(fd, &msg);
2920 skip_to_post_handle:
2921 if (ret != RTE_VHOST_MSG_RESULT_ERR &&
2922 dev->extern_ops.post_msg_handle) {
2923 ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
2926 case RTE_VHOST_MSG_RESULT_REPLY:
2927 send_vhost_reply(fd, &msg);
2929 case RTE_VHOST_MSG_RESULT_ERR:
2930 case RTE_VHOST_MSG_RESULT_OK:
2932 case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
2938 if (unlock_required)
2939 vhost_user_unlock_all_queue_pairs(dev);
2941 /* If message was not handled at this stage, treat it as an error */
2943 VHOST_LOG_CONFIG(ERR,
2944 "vhost message (req: %d) was not handled.\n", request);
2945 close_msg_fds(&msg);
2946 ret = RTE_VHOST_MSG_RESULT_ERR;
2950 * If the request required a reply that was already sent,
2951 * this optional reply-ack won't be sent as the
2952 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
2954 if (msg.flags & VHOST_USER_NEED_REPLY) {
2955 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
2956 msg.size = sizeof(msg.payload.u64);
2958 send_vhost_reply(fd, &msg);
2959 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
2960 VHOST_LOG_CONFIG(ERR,
2961 "vhost message handling failed.\n");
2965 for (i = 0; i < dev->nr_vring; i++) {
2966 struct vhost_virtqueue *vq = dev->virtqueue[i];
2967 bool cur_ready = vq_is_ready(dev, vq);
2969 if (cur_ready != (vq && vq->ready)) {
2970 vq->ready = cur_ready;
2971 vhost_user_notify_queue_state(dev, i, cur_ready);
2976 if (!virtio_is_ready(dev))
2980 * Virtio is now ready. If not done already, it is time
2981 * to notify the application it can process the rings and
2982 * configure the vDPA device if present.
2985 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
2986 if (dev->notify_ops->new_device(dev->vid) == 0)
2987 dev->flags |= VIRTIO_DEV_RUNNING;
2990 vdpa_dev = dev->vdpa_dev;
2994 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
2995 if (vdpa_dev->ops->dev_conf(dev->vid))
2996 VHOST_LOG_CONFIG(ERR,
2997 "Failed to configure vDPA device\n");
2999 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
3006 static int process_slave_message_reply(struct virtio_net *dev,
3007 const struct VhostUserMsg *msg)
3009 struct VhostUserMsg msg_reply;
3012 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
3015 ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
3018 VHOST_LOG_CONFIG(ERR,
3019 "vhost read slave message reply failed\n");
3021 VHOST_LOG_CONFIG(INFO,
3022 "vhost peer closed\n");
3028 if (msg_reply.request.slave != msg->request.slave) {
3029 VHOST_LOG_CONFIG(ERR,
3030 "Received unexpected msg type (%u), expected %u\n",
3031 msg_reply.request.slave, msg->request.slave);
3036 ret = msg_reply.payload.u64 ? -1 : 0;
3039 rte_spinlock_unlock(&dev->slave_req_lock);
3044 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
3047 struct VhostUserMsg msg = {
3048 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
3049 .flags = VHOST_USER_VERSION,
3050 .size = sizeof(msg.payload.iotlb),
3054 .type = VHOST_IOTLB_MISS,
3058 ret = send_vhost_message(dev->slave_req_fd, &msg);
3060 VHOST_LOG_CONFIG(ERR,
3061 "Failed to send IOTLB miss message (%d)\n",
3070 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
3073 struct VhostUserMsg msg = {
3074 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
3075 .flags = VHOST_USER_VERSION,
3080 msg.flags |= VHOST_USER_NEED_REPLY;
3082 ret = send_vhost_slave_message(dev, &msg);
3084 VHOST_LOG_CONFIG(ERR,
3085 "Failed to send config change (%d)\n",
3090 return process_slave_message_reply(dev, &msg);
3094 rte_vhost_slave_config_change(int vid, bool need_reply)
3096 struct virtio_net *dev;
3098 dev = get_device(vid);
3102 return vhost_user_slave_config_change(dev, need_reply);
3105 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
3111 struct VhostUserMsg msg = {
3112 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
3113 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
3114 .size = sizeof(msg.payload.area),
3116 .u64 = index & VHOST_USER_VRING_IDX_MASK,
3123 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
3129 ret = send_vhost_slave_message(dev, &msg);
3131 VHOST_LOG_CONFIG(ERR,
3132 "Failed to set host notifier (%d)\n", ret);
3136 return process_slave_message_reply(dev, &msg);
3139 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
3141 struct virtio_net *dev;
3142 struct rte_vdpa_device *vdpa_dev;
3143 int vfio_device_fd, ret = 0;
3144 uint64_t offset, size;
3145 unsigned int i, q_start, q_last;
3147 dev = get_device(vid);
3151 vdpa_dev = dev->vdpa_dev;
3152 if (vdpa_dev == NULL)
3155 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
3156 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
3157 !(dev->protocol_features &
3158 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
3159 !(dev->protocol_features &
3160 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
3161 !(dev->protocol_features &
3162 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
3165 if (qid == RTE_VHOST_QUEUE_ALL) {
3167 q_last = dev->nr_vring - 1;
3169 if (qid >= dev->nr_vring)
3175 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
3176 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
3178 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
3179 if (vfio_device_fd < 0)
3183 for (i = q_start; i <= q_last; i++) {
3184 if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
3190 if (vhost_user_slave_set_vring_host_notifier(dev, i,
3191 vfio_device_fd, offset, size) < 0) {
3198 for (i = q_start; i <= q_last; i++) {
3199 vhost_user_slave_set_vring_host_notifier(dev, i, -1,