/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation
*/
/* Security model
* --------------
* The vhost-user protocol connection is an external interface, so it must be
* robust against invalid inputs.
*
* This is important because the vhost-user master is only one step removed
* from the guest. Malicious guests that have escaped will then launch further
* attacks from the vhost-user master.
*
* Even in deployments where guests are trusted, a bug in the vhost-user master
* can still cause invalid messages to be sent. Such messages must not
* compromise the stability of the DPDK application by causing crashes, memory
* corruption, or other problematic behavior.
*
* Do not assume received VhostUserMsg fields contain sensible values!
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <assert.h>
#ifdef RTE_LIBRTE_VHOST_NUMA
#include <numaif.h>
#endif
#ifdef RTE_LIBRTE_VHOST_POSTCOPY
#include <linux/userfaultfd.h>
#endif
#ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */
#include <linux/memfd.h>
#define MEMFD_SUPPORTED
#endif
#include <rte_common.h>
#include <rte_malloc.h>
#include <rte_log.h>
#include "iotlb.h"
#include "vhost.h"
#include "vhost_user.h"
#define VIRTIO_MIN_MTU 68
#define VIRTIO_MAX_MTU 65535
#define INFLIGHT_ALIGNMENT 64
#define INFLIGHT_VERSION 0x1
static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_NONE] = "VHOST_USER_NONE",
[VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
[VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
[VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
[VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
[VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
[VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
[VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
[VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
[VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
[VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
[VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
[VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
[VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
[VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR",
[VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES",
[VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES",
[VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
[VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
[VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
[VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
[VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
[VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
[VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
[VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
[VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
[VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
[VHOST_USER_GET_INFLIGHT_FD] = "VHOST_USER_GET_INFLIGHT_FD",
[VHOST_USER_SET_INFLIGHT_FD] = "VHOST_USER_SET_INFLIGHT_FD",
[VHOST_USER_SET_STATUS] = "VHOST_USER_SET_STATUS",
[VHOST_USER_GET_STATUS] = "VHOST_USER_GET_STATUS",
};
static int send_vhost_reply(int sockfd, struct VhostUserMsg *msg);
static int read_vhost_message(int sockfd, struct VhostUserMsg *msg);
static void
close_msg_fds(struct VhostUserMsg *msg)
{
int i;
for (i = 0; i < msg->fd_num; i++) {
int fd = msg->fds[i];
if (fd == -1)
continue;
msg->fds[i] = -1;
close(fd);
}
}
/*
* Ensure the expected number of FDs is received,
* close all FDs and return an error if this is not the case.
*/
static int
validate_msg_fds(struct VhostUserMsg *msg, int expected_fds)
{
if (msg->fd_num == expected_fds)
return 0;
VHOST_LOG_CONFIG(ERR,
" Expect %d FDs for request %s, received %d\n",
expected_fds,
vhost_message_str[msg->request.master],
msg->fd_num);
close_msg_fds(msg);
return -1;
}
static uint64_t
get_blk_size(int fd)
{
struct stat stat;
int ret;
ret = fstat(fd, &stat);
return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
}
static void
free_mem_region(struct virtio_net *dev)
{
uint32_t i;
struct rte_vhost_mem_region *reg;
if (!dev || !dev->mem)
return;
for (i = 0; i < dev->mem->nregions; i++) {
reg = &dev->mem->regions[i];
if (reg->host_user_addr) {
munmap(reg->mmap_addr, reg->mmap_size);
close(reg->fd);
}
}
}
void
vhost_backend_cleanup(struct virtio_net *dev)
{
if (dev->mem) {
free_mem_region(dev);
rte_free(dev->mem);
dev->mem = NULL;
}
rte_free(dev->guest_pages);
dev->guest_pages = NULL;
if (dev->log_addr) {
munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
dev->log_addr = 0;
}
if (dev->inflight_info) {
if (dev->inflight_info->addr) {
munmap(dev->inflight_info->addr,
dev->inflight_info->size);
dev->inflight_info->addr = NULL;
}
if (dev->inflight_info->fd >= 0) {
close(dev->inflight_info->fd);
dev->inflight_info->fd = -1;
}
free(dev->inflight_info);
dev->inflight_info = NULL;
}
if (dev->slave_req_fd >= 0) {
close(dev->slave_req_fd);
dev->slave_req_fd = -1;
}
if (dev->postcopy_ufd >= 0) {
close(dev->postcopy_ufd);
dev->postcopy_ufd = -1;
}
dev->postcopy_listening = 0;
}
static void
vhost_user_notify_queue_state(struct virtio_net *dev, uint16_t index,
int enable)
{
struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
struct vhost_virtqueue *vq = dev->virtqueue[index];
/* Configure guest notifications on enable */
if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF)
vhost_enable_guest_notification(dev, vq, vq->notif_enable);
if (vdpa_dev && vdpa_dev->ops->set_vring_state)
vdpa_dev->ops->set_vring_state(dev->vid, index, enable);
if (dev->notify_ops->vring_state_changed)
dev->notify_ops->vring_state_changed(dev->vid,
index, enable);
}
/*
* This function just returns success at the moment unless
* the device hasn't been initialised.
*/
static int
vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_reset_owner(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
return RTE_VHOST_MSG_RESULT_OK;
}
/*
* The features that we support are requested.
*/
static int
vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
uint64_t features = 0;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
rte_vhost_driver_get_features(dev->ifname, &features);
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
static int
vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
rte_vhost_driver_get_features(dev->ifname, &vhost_features);
if (features & ~vhost_features) {
VHOST_LOG_CONFIG(ERR,
"(%d) received invalid negotiated features.\n",
dev->vid);
dev->flags |= VIRTIO_DEV_FEATURES_FAILED;
dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
return RTE_VHOST_MSG_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
return RTE_VHOST_MSG_RESULT_OK;
/*
* Error out if master tries to change features while device is
* in running state. The exception being VHOST_F_LOG_ALL, which
* is enabled when the live-migration starts.
*/
if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
VHOST_LOG_CONFIG(ERR,
"(%d) features changed while device is running.\n",
dev->vid);
return RTE_VHOST_MSG_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
dev->notify_ops->features_changed(dev->vid, features);
}
dev->features = features;
if (dev->features &
((1ULL << VIRTIO_NET_F_MRG_RXBUF) |
(1ULL << VIRTIO_F_VERSION_1) |
(1ULL << VIRTIO_F_RING_PACKED))) {
dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
} else {
dev->vhost_hlen = sizeof(struct virtio_net_hdr);
}
VHOST_LOG_CONFIG(INFO,
"negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
VHOST_LOG_CONFIG(DEBUG,
"(%d) mergeable RX buffers %s, virtio 1 %s\n",
dev->vid,
(dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
!(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
/*
* Remove all but first queue pair if MQ hasn't been
* negotiated. This is safe because the device is not
* running at this stage.
*/
while (dev->nr_vring > 2) {
struct vhost_virtqueue *vq;
vq = dev->virtqueue[--dev->nr_vring];
if (!vq)
continue;
dev->virtqueue[dev->nr_vring] = NULL;
cleanup_vq(vq, 1);
cleanup_vq_inflight(dev, vq);
free_vq(dev, vq);
}
}
vdpa_dev = dev->vdpa_dev;
if (vdpa_dev)
vdpa_dev->ops->set_features(dev->vid);
dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED;
return RTE_VHOST_MSG_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
vhost_user_set_vring_num(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
vq->size = msg->payload.state.num;
/* VIRTIO 1.0, 2.4 Virtqueues says:
*
* Queue Size value is always a power of 2. The maximum Queue Size
* value is 32768.
*
* VIRTIO 1.1 2.7 Virtqueues says:
*
* Packed virtqueues support up to 2^15 entries each.
*/
if (!vq_is_packed(dev)) {
if (vq->size & (vq->size - 1)) {
VHOST_LOG_CONFIG(ERR,
"invalid virtqueue size %u\n", vq->size);
return RTE_VHOST_MSG_RESULT_ERR;
}
}
if (vq->size > 32768) {
VHOST_LOG_CONFIG(ERR,
"invalid virtqueue size %u\n", vq->size);
return RTE_VHOST_MSG_RESULT_ERR;
}
if (vq_is_packed(dev)) {
if (vq->shadow_used_packed)
rte_free(vq->shadow_used_packed);
vq->shadow_used_packed = rte_malloc(NULL,
vq->size *
sizeof(struct vring_used_elem_packed),
RTE_CACHE_LINE_SIZE);
if (!vq->shadow_used_packed) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for shadow used ring.\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
} else {
if (vq->shadow_used_split)
rte_free(vq->shadow_used_split);
vq->shadow_used_split = rte_malloc(NULL,
vq->size * sizeof(struct vring_used_elem),
RTE_CACHE_LINE_SIZE);
if (!vq->shadow_used_split) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for vq internal data.\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
}
if (vq->batch_copy_elems)
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = rte_malloc(NULL,
vq->size * sizeof(struct batch_copy_elem),
RTE_CACHE_LINE_SIZE);
if (!vq->batch_copy_elems) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for batching copy.\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
return RTE_VHOST_MSG_RESULT_OK;
}
/*
* Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
* same numa node as the memory of vring descriptor.
*/
#ifdef RTE_LIBRTE_VHOST_NUMA
static struct virtio_net*
numa_realloc(struct virtio_net *dev, int index)
{
int oldnode, newnode;
struct virtio_net *old_dev;
struct vhost_virtqueue *old_vq, *vq;
struct vring_used_elem *new_shadow_used_split;
struct vring_used_elem_packed *new_shadow_used_packed;
struct batch_copy_elem *new_batch_copy_elems;
int ret;
if (dev->flags & VIRTIO_DEV_RUNNING)
return dev;
old_dev = dev;
vq = old_vq = dev->virtqueue[index];
ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
MPOL_F_NODE | MPOL_F_ADDR);
/* check if we need to reallocate vq */
ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
MPOL_F_NODE | MPOL_F_ADDR);
if (ret) {
VHOST_LOG_CONFIG(ERR,
"Unable to get vq numa information.\n");
return dev;
}
if (oldnode != newnode) {
VHOST_LOG_CONFIG(INFO,
"reallocate vq from %d to %d node\n", oldnode, newnode);
vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
if (!vq)
return dev;
memcpy(vq, old_vq, sizeof(*vq));
if (vq_is_packed(dev)) {
new_shadow_used_packed = rte_malloc_socket(NULL,
vq->size *
sizeof(struct vring_used_elem_packed),
RTE_CACHE_LINE_SIZE,
newnode);
if (new_shadow_used_packed) {
rte_free(vq->shadow_used_packed);
vq->shadow_used_packed = new_shadow_used_packed;
}
} else {
new_shadow_used_split = rte_malloc_socket(NULL,
vq->size *
sizeof(struct vring_used_elem),
RTE_CACHE_LINE_SIZE,
newnode);
if (new_shadow_used_split) {
rte_free(vq->shadow_used_split);
vq->shadow_used_split = new_shadow_used_split;
}
}
new_batch_copy_elems = rte_malloc_socket(NULL,
vq->size * sizeof(struct batch_copy_elem),
RTE_CACHE_LINE_SIZE,
newnode);
if (new_batch_copy_elems) {
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = new_batch_copy_elems;
}
rte_free(old_vq);
}
/* check if we need to reallocate dev */
ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
MPOL_F_NODE | MPOL_F_ADDR);
if (ret) {
VHOST_LOG_CONFIG(ERR,
"Unable to get dev numa information.\n");
goto out;
}
if (oldnode != newnode) {
VHOST_LOG_CONFIG(INFO,
"reallocate dev from %d to %d node\n",
oldnode, newnode);
dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
if (!dev) {
dev = old_dev;
goto out;
}
memcpy(dev, old_dev, sizeof(*dev));
rte_free(old_dev);
}
out:
dev->virtqueue[index] = vq;
vhost_devices[dev->vid] = dev;
if (old_vq != vq)
vhost_user_iotlb_init(dev, index);
return dev;
}
#else
static struct virtio_net*
numa_realloc(struct virtio_net *dev, int index __rte_unused)
{
return dev;
}
#endif
/* Converts QEMU virtual address to Vhost virtual address. */
static uint64_t
qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len)
{
struct rte_vhost_mem_region *r;
uint32_t i;
if (unlikely(!dev || !dev->mem))
goto out_error;
/* Find the region where the address lives. */
for (i = 0; i < dev->mem->nregions; i++) {
r = &dev->mem->regions[i];
if (qva >= r->guest_user_addr &&
qva < r->guest_user_addr + r->size) {
if (unlikely(*len > r->guest_user_addr + r->size - qva))
*len = r->guest_user_addr + r->size - qva;
return qva - r->guest_user_addr +
r->host_user_addr;
}
}
out_error:
*len = 0;
return 0;
}
/*
* Converts ring address to Vhost virtual address.
* If IOMMU is enabled, the ring address is a guest IO virtual address,
* else it is a QEMU virtual address.
*/
static uint64_t
ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
uint64_t ra, uint64_t *size)
{
if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
uint64_t vva;
vhost_user_iotlb_rd_lock(vq);
vva = vhost_iova_to_vva(dev, vq, ra,
size, VHOST_ACCESS_RW);
vhost_user_iotlb_rd_unlock(vq);
return vva;
}
return qva_to_vva(dev, ra, size);
}
static uint64_t
log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq)
{
uint64_t log_gpa;
vhost_user_iotlb_rd_lock(vq);
log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr);
vhost_user_iotlb_rd_unlock(vq);
return log_gpa;
}
static struct virtio_net *
translate_ring_addresses(struct virtio_net *dev, int vq_index)
{
struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
struct vhost_vring_addr *addr = &vq->ring_addrs;
uint64_t len, expected_len;
if (addr->flags & (1 << VHOST_VRING_F_LOG)) {
vq->log_guest_addr =
log_addr_to_gpa(dev, vq);
if (vq->log_guest_addr == 0) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to map log_guest_addr.\n",
dev->vid);
return dev;
}
}
if (vq_is_packed(dev)) {
len = sizeof(struct vring_packed_desc) * vq->size;
vq->desc_packed = (struct vring_packed_desc *)(uintptr_t)
ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len);
if (vq->desc_packed == NULL ||
len != sizeof(struct vring_packed_desc) *
vq->size) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to map desc_packed ring.\n",
dev->vid);
return dev;
}
dev = numa_realloc(dev, vq_index);
vq = dev->virtqueue[vq_index];
addr = &vq->ring_addrs;
len = sizeof(struct vring_packed_desc_event);
vq->driver_event = (struct vring_packed_desc_event *)
(uintptr_t)ring_addr_to_vva(dev,
vq, addr->avail_user_addr, &len);
if (vq->driver_event == NULL ||
len != sizeof(struct vring_packed_desc_event)) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to find driver area address.\n",
dev->vid);
return dev;
}
len = sizeof(struct vring_packed_desc_event);
vq->device_event = (struct vring_packed_desc_event *)
(uintptr_t)ring_addr_to_vva(dev,
vq, addr->used_user_addr, &len);
if (vq->device_event == NULL ||
len != sizeof(struct vring_packed_desc_event)) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to find device area address.\n",
dev->vid);
return dev;
}
vq->access_ok = 1;
return dev;
}
/* The addresses are converted from QEMU virtual to Vhost virtual. */
if (vq->desc && vq->avail && vq->used)
return dev;
len = sizeof(struct vring_desc) * vq->size;
vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
vq, addr->desc_user_addr, &len);
if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to map desc ring.\n",
dev->vid);
return dev;
}
dev = numa_realloc(dev, vq_index);
vq = dev->virtqueue[vq_index];
addr = &vq->ring_addrs;
len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
len += sizeof(uint16_t);
expected_len = len;
vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
vq, addr->avail_user_addr, &len);
if (vq->avail == 0 || len != expected_len) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to map avail ring.\n",
dev->vid);
return dev;
}
len = sizeof(struct vring_used) +
sizeof(struct vring_used_elem) * vq->size;
if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX))
len += sizeof(uint16_t);
expected_len = len;
vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
vq, addr->used_user_addr, &len);
if (vq->used == 0 || len != expected_len) {
VHOST_LOG_CONFIG(DEBUG,
"(%d) failed to map used ring.\n",
dev->vid);
return dev;
}
if (vq->last_used_idx != vq->used->idx) {
VHOST_LOG_CONFIG(WARNING,
"last_used_idx (%u) and vq->used->idx (%u) mismatches; "
"some packets maybe resent for Tx and dropped for Rx\n",
vq->last_used_idx, vq->used->idx);
vq->last_used_idx = vq->used->idx;
vq->last_avail_idx = vq->used->idx;
}
vq->access_ok = 1;
VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address desc: %p\n",
dev->vid, vq->desc);
VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address avail: %p\n",
dev->vid, vq->avail);
VHOST_LOG_CONFIG(DEBUG, "(%d) mapped address used: %p\n",
dev->vid, vq->used);
VHOST_LOG_CONFIG(DEBUG, "(%d) log_guest_addr: %" PRIx64 "\n",
dev->vid, vq->log_guest_addr);
return dev;
}
/*
* The virtio device sends us the desc, used and avail ring addresses.
* This function then converts these to our address space.
*/
static int
vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_virtqueue *vq;
struct vhost_vring_addr *addr = &msg->payload.addr;
bool access_ok;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (dev->mem == NULL)
return RTE_VHOST_MSG_RESULT_ERR;
/* addr->index refers to the queue index. The txq 1, rxq is 0. */
vq = dev->virtqueue[msg->payload.addr.index];
access_ok = vq->access_ok;
/*
* Rings addresses should not be interpreted as long as the ring is not
* started and enabled
*/
memcpy(&vq->ring_addrs, addr, sizeof(*addr));
vring_invalidate(dev, vq);
if ((vq->enabled && (dev->features &
(1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) ||
access_ok) {
dev = translate_ring_addresses(dev, msg->payload.addr.index);
if (!dev)
return RTE_VHOST_MSG_RESULT_ERR;
*pdev = dev;
}
return RTE_VHOST_MSG_RESULT_OK;
}
/*
* The virtio device sends us the available ring last used index.
*/
static int
vhost_user_set_vring_base(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
uint64_t val = msg->payload.state.num;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (vq_is_packed(dev)) {
/*
* Bit[0:14]: avail index
* Bit[15]: avail wrap counter
*/
vq->last_avail_idx = val & 0x7fff;
vq->avail_wrap_counter = !!(val & (0x1 << 15));
/*
* Set used index to same value as available one, as
* their values should be the same since ring processing
* was stopped at get time.
*/
vq->last_used_idx = vq->last_avail_idx;
vq->used_wrap_counter = vq->avail_wrap_counter;
} else {
vq->last_used_idx = msg->payload.state.num;
vq->last_avail_idx = msg->payload.state.num;
}
return RTE_VHOST_MSG_RESULT_OK;
}
static int
add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
uint64_t host_phys_addr, uint64_t size)
{
struct guest_page *page, *last_page;
struct guest_page *old_pages;
if (dev->nr_guest_pages == dev->max_guest_pages) {
dev->max_guest_pages *= 2;
old_pages = dev->guest_pages;
dev->guest_pages = rte_realloc(dev->guest_pages,
dev->max_guest_pages * sizeof(*page),
RTE_CACHE_LINE_SIZE);
if (dev->guest_pages == NULL) {
VHOST_LOG_CONFIG(ERR, "cannot realloc guest_pages\n");
rte_free(old_pages);
return -1;
}
}
if (dev->nr_guest_pages > 0) {
last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
/* merge if the two pages are continuous */
if (host_phys_addr == last_page->host_phys_addr +
last_page->size) {
last_page->size += size;
return 0;
}
}
page = &dev->guest_pages[dev->nr_guest_pages++];
page->guest_phys_addr = guest_phys_addr;
page->host_phys_addr = host_phys_addr;
page->size = size;
return 0;
}
static int
add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
uint64_t page_size)
{
uint64_t reg_size = reg->size;
uint64_t host_user_addr = reg->host_user_addr;
uint64_t guest_phys_addr = reg->guest_phys_addr;
uint64_t host_phys_addr;
uint64_t size;
host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr);
size = page_size - (guest_phys_addr & (page_size - 1));
size = RTE_MIN(size, reg_size);
if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size) < 0)
return -1;
host_user_addr += size;
guest_phys_addr += size;
reg_size -= size;
while (reg_size > 0) {
size = RTE_MIN(reg_size, page_size);
host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t)
host_user_addr);
if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr,
size) < 0)
return -1;
host_user_addr += size;
guest_phys_addr += size;
reg_size -= size;
}
/* sort guest page array if over binary search threshold */
if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) {
qsort((void *)dev->guest_pages, dev->nr_guest_pages,
sizeof(struct guest_page), guest_page_addrcmp);
}
return 0;
}
#ifdef RTE_LIBRTE_VHOST_DEBUG
/* TODO: enable it only in debug mode? */
static void
dump_guest_pages(struct virtio_net *dev)
{
uint32_t i;
struct guest_page *page;
for (i = 0; i < dev->nr_guest_pages; i++) {
page = &dev->guest_pages[i];
VHOST_LOG_CONFIG(INFO,
"guest physical page region %u\n"
"\t guest_phys_addr: %" PRIx64 "\n"
"\t host_phys_addr : %" PRIx64 "\n"
"\t size : %" PRIx64 "\n",
i,
page->guest_phys_addr,
page->host_phys_addr,
page->size);
}
}
#else
#define dump_guest_pages(dev)
#endif
static bool
vhost_memory_changed(struct VhostUserMemory *new,
struct rte_vhost_memory *old)
{
uint32_t i;
if (new->nregions != old->nregions)
return true;
for (i = 0; i < new->nregions; ++i) {
VhostUserMemoryRegion *new_r = &new->regions[i];
struct rte_vhost_mem_region *old_r = &old->regions[i];
if (new_r->guest_phys_addr != old_r->guest_phys_addr)
return true;
if (new_r->memory_size != old_r->size)
return true;
if (new_r->userspace_addr != old_r->guest_user_addr)
return true;
}
return false;
}
static int
vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd)
{
struct virtio_net *dev = *pdev;
struct VhostUserMemory *memory = &msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
uint64_t mmap_offset;
uint64_t alignment;
uint32_t i;
int populate;
if (validate_msg_fds(msg, memory->nregions) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) {
VHOST_LOG_CONFIG(ERR,
"too many memory regions (%u)\n", memory->nregions);
goto close_msg_fds;
}
if (dev->mem && !vhost_memory_changed(memory, dev->mem)) {
VHOST_LOG_CONFIG(INFO,
"(%d) memory regions not changed\n", dev->vid);
close_msg_fds(msg);
return RTE_VHOST_MSG_RESULT_OK;
}
if (dev->mem) {
if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
if (vdpa_dev && vdpa_dev->ops->dev_close)
vdpa_dev->ops->dev_close(dev->vid);
dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
}
free_mem_region(dev);
rte_free(dev->mem);
dev->mem = NULL;
}
/* Flush IOTLB cache as previous HVAs are now invalid */
if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))
for (i = 0; i < dev->nr_vring; i++)
vhost_user_iotlb_flush_all(dev->virtqueue[i]);
dev->nr_guest_pages = 0;
if (dev->guest_pages == NULL) {
dev->max_guest_pages = 8;
dev->guest_pages = rte_zmalloc(NULL,
dev->max_guest_pages *
sizeof(struct guest_page),
RTE_CACHE_LINE_SIZE);
if (dev->guest_pages == NULL) {
VHOST_LOG_CONFIG(ERR,
"(%d) failed to allocate memory "
"for dev->guest_pages\n",
dev->vid);
goto close_msg_fds;
}
}
dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
sizeof(struct rte_vhost_mem_region) * memory->nregions, 0);
if (dev->mem == NULL) {
VHOST_LOG_CONFIG(ERR,
"(%d) failed to allocate memory for dev->mem\n",
dev->vid);
goto free_guest_pages;
}
dev->mem->nregions = memory->nregions;
for (i = 0; i < memory->nregions; i++) {
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory->regions[i].guest_phys_addr;
reg->guest_user_addr = memory->regions[i].userspace_addr;
reg->size = memory->regions[i].memory_size;
reg->fd = msg->fds[i];
/*
* Assign invalid file descriptor value to avoid double
* closing on error path.
*/
msg->fds[i] = -1;
mmap_offset = memory->regions[i].mmap_offset;
/* Check for memory_size + mmap_offset overflow */
if (mmap_offset >= -reg->size) {
VHOST_LOG_CONFIG(ERR,
"mmap_offset (%#"PRIx64") and memory_size "
"(%#"PRIx64") overflow\n",
mmap_offset, reg->size);
goto free_mem_table;
}
mmap_size = reg->size + mmap_offset;
/* mmap() without flag of MAP_ANONYMOUS, should be called
* with length argument aligned with hugepagesz at older
* longterm version Linux, like 2.6.32 and 3.2.72, or
* mmap() will fail with EINVAL.
*
* to avoid failure, make sure in caller to keep length
* aligned.
*/
alignment = get_blk_size(reg->fd);
if (alignment == (uint64_t)-1) {
VHOST_LOG_CONFIG(ERR,
"couldn't get hugepage size through fstat\n");
goto free_mem_table;
}
mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
if (mmap_size == 0) {
/*
* It could happen if initial mmap_size + alignment
* overflows the sizeof uint64, which could happen if
* either mmap_size or alignment value is wrong.
*
* mmap() kernel implementation would return an error,
* but better catch it before and provide useful info
* in the logs.
*/
VHOST_LOG_CONFIG(ERR, "mmap size (0x%" PRIx64 ") "
"or alignment (0x%" PRIx64 ") is invalid\n",
reg->size + mmap_offset, alignment);
goto free_mem_table;
}
populate = dev->async_copy ? MAP_POPULATE : 0;
mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
MAP_SHARED | populate, reg->fd, 0);
if (mmap_addr == MAP_FAILED) {
VHOST_LOG_CONFIG(ERR,
"mmap region %u failed.\n", i);
goto free_mem_table;
}
reg->mmap_addr = mmap_addr;
reg->mmap_size = mmap_size;
reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
mmap_offset;
if (dev->async_copy)
if (add_guest_pages(dev, reg, alignment) < 0) {
VHOST_LOG_CONFIG(ERR,
"adding guest pages to region %u failed.\n",
i);
goto free_mem_table;
}
VHOST_LOG_CONFIG(INFO,
"guest memory region %u, size: 0x%" PRIx64 "\n"
"\t guest physical addr: 0x%" PRIx64 "\n"
"\t guest virtual addr: 0x%" PRIx64 "\n"
"\t host virtual addr: 0x%" PRIx64 "\n"
"\t mmap addr : 0x%" PRIx64 "\n"
"\t mmap size : 0x%" PRIx64 "\n"
"\t mmap align: 0x%" PRIx64 "\n"
"\t mmap off : 0x%" PRIx64 "\n",
i, reg->size,
reg->guest_phys_addr,
reg->guest_user_addr,
reg->host_user_addr,
(uint64_t)(uintptr_t)mmap_addr,
mmap_size,
alignment,
mmap_offset);
if (dev->postcopy_listening) {
/*
* We haven't a better way right now than sharing
* DPDK's virtual address with Qemu, so that Qemu can
* retrieve the region offset when handling userfaults.
*/
memory->regions[i].userspace_addr =
reg->host_user_addr;
}
}
if (dev->postcopy_listening) {
/* Send the addresses back to qemu */
msg->fd_num = 0;
send_vhost_reply(main_fd, msg);
/* Wait for qemu to acknolwedge it's got the addresses
* we've got to wait before we're allowed to generate faults.
*/
VhostUserMsg ack_msg;
if (read_vhost_message(main_fd, &ack_msg) <= 0) {
VHOST_LOG_CONFIG(ERR,
"Failed to read qemu ack on postcopy set-mem-table\n");
goto free_mem_table;
}
if (validate_msg_fds(&ack_msg, 0) != 0)
goto free_mem_table;
if (ack_msg.request.master != VHOST_USER_SET_MEM_TABLE) {
VHOST_LOG_CONFIG(ERR,
"Bad qemu ack on postcopy set-mem-table (%d)\n",
ack_msg.request.master);
goto free_mem_table;
}
/* Now userfault register and we can use the memory */
for (i = 0; i < memory->nregions; i++) {
#ifdef RTE_LIBRTE_VHOST_POSTCOPY
reg = &dev->mem->regions[i];
struct uffdio_register reg_struct;
/*
* Let's register all the mmap'ed area to ensure
* alignment on page boundary.
*/
reg_struct.range.start =
(uint64_t)(uintptr_t)reg->mmap_addr;
reg_struct.range.len = reg->mmap_size;
reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER,
®_struct)) {
VHOST_LOG_CONFIG(ERR,
"Failed to register ufd for region %d: (ufd = %d) %s\n",
i, dev->postcopy_ufd,
strerror(errno));
goto free_mem_table;
}
VHOST_LOG_CONFIG(INFO,
"\t userfaultfd registered for range : "
"%" PRIx64 " - %" PRIx64 "\n",
(uint64_t)reg_struct.range.start,
(uint64_t)reg_struct.range.start +
(uint64_t)reg_struct.range.len - 1);
#else
goto free_mem_table;
#endif
}
}
for (i = 0; i < dev->nr_vring; i++) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
if (!vq)
continue;
if (vq->desc || vq->avail || vq->used) {
/*
* If the memory table got updated, the ring addresses
* need to be translated again as virtual addresses have
* changed.
*/
vring_invalidate(dev, vq);
dev = translate_ring_addresses(dev, i);
if (!dev) {
dev = *pdev;
goto free_mem_table;
}
*pdev = dev;
}
}
dump_guest_pages(dev);
return RTE_VHOST_MSG_RESULT_OK;
free_mem_table:
free_mem_region(dev);
rte_free(dev->mem);
dev->mem = NULL;
free_guest_pages:
rte_free(dev->guest_pages);
dev->guest_pages = NULL;
close_msg_fds:
close_msg_fds(msg);
return RTE_VHOST_MSG_RESULT_ERR;
}
static bool
vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq)
{
bool rings_ok;
if (!vq)
return false;
if (vq_is_packed(dev))
rings_ok = vq->desc_packed && vq->driver_event &&
vq->device_event;
else
rings_ok = vq->desc && vq->avail && vq->used;
return rings_ok &&
vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD &&
vq->enabled;
}
#define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u
static int
virtio_is_ready(struct virtio_net *dev)
{
struct vhost_virtqueue *vq;
uint32_t i, nr_vring = dev->nr_vring;
if (dev->flags & VIRTIO_DEV_READY)
return 1;
if (!dev->nr_vring)
return 0;
if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) {
nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY;
if (dev->nr_vring < nr_vring)
return 0;
}
for (i = 0; i < nr_vring; i++) {
vq = dev->virtqueue[i];
if (!vq_is_ready(dev, vq))
return 0;
}
/* If supported, ensure the frontend is really done with config */
if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS))
if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK))
return 0;
dev->flags |= VIRTIO_DEV_READY;
if (!(dev->flags & VIRTIO_DEV_RUNNING))
VHOST_LOG_CONFIG(INFO,
"virtio is now ready for processing.\n");
return 1;
}
static void *
inflight_mem_alloc(const char *name, size_t size, int *fd)
{
void *ptr;
int mfd = -1;
char fname[20] = "/tmp/memfd-XXXXXX";
*fd = -1;
#ifdef MEMFD_SUPPORTED
mfd = memfd_create(name, MFD_CLOEXEC);
#else
RTE_SET_USED(name);
#endif
if (mfd == -1) {
mfd = mkstemp(fname);
if (mfd == -1) {
VHOST_LOG_CONFIG(ERR,
"failed to get inflight buffer fd\n");
return NULL;
}
unlink(fname);
}
if (ftruncate(mfd, size) == -1) {
VHOST_LOG_CONFIG(ERR,
"failed to alloc inflight buffer\n");
close(mfd);
return NULL;
}
ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0);
if (ptr == MAP_FAILED) {
VHOST_LOG_CONFIG(ERR,
"failed to mmap inflight buffer\n");
close(mfd);
return NULL;
}
*fd = mfd;
return ptr;
}
static uint32_t
get_pervq_shm_size_split(uint16_t queue_size)
{
return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) *
queue_size + sizeof(uint64_t) +
sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT);
}
static uint32_t
get_pervq_shm_size_packed(uint16_t queue_size)
{
return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed)
* queue_size + sizeof(uint64_t) +
sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9,
INFLIGHT_ALIGNMENT);
}
static int
vhost_user_get_inflight_fd(struct virtio_net **pdev,
VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct rte_vhost_inflight_info_packed *inflight_packed;
uint64_t pervq_inflight_size, mmap_size;
uint16_t num_queues, queue_size;
struct virtio_net *dev = *pdev;
int fd, i, j;
void *addr;
if (msg->size != sizeof(msg->payload.inflight)) {
VHOST_LOG_CONFIG(ERR,
"invalid get_inflight_fd message size is %d\n",
msg->size);
return RTE_VHOST_MSG_RESULT_ERR;
}
if (dev->inflight_info == NULL) {
dev->inflight_info = calloc(1,
sizeof(struct inflight_mem_info));
if (!dev->inflight_info) {
VHOST_LOG_CONFIG(ERR,
"failed to alloc dev inflight area\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
dev->inflight_info->fd = -1;
}
num_queues = msg->payload.inflight.num_queues;
queue_size = msg->payload.inflight.queue_size;
VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n",
msg->payload.inflight.num_queues);
VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n",
msg->payload.inflight.queue_size);
if (vq_is_packed(dev))
pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
else
pervq_inflight_size = get_pervq_shm_size_split(queue_size);
mmap_size = num_queues * pervq_inflight_size;
addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd);
if (!addr) {
VHOST_LOG_CONFIG(ERR,
"failed to alloc vhost inflight area\n");
msg->payload.inflight.mmap_size = 0;
return RTE_VHOST_MSG_RESULT_ERR;
}
memset(addr, 0, mmap_size);
if (dev->inflight_info->addr) {
munmap(dev->inflight_info->addr, dev->inflight_info->size);
dev->inflight_info->addr = NULL;
}
if (dev->inflight_info->fd >= 0) {
close(dev->inflight_info->fd);
dev->inflight_info->fd = -1;
}
dev->inflight_info->addr = addr;
dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size;
dev->inflight_info->fd = msg->fds[0] = fd;
msg->payload.inflight.mmap_offset = 0;
msg->fd_num = 1;
if (vq_is_packed(dev)) {
for (i = 0; i < num_queues; i++) {
inflight_packed =
(struct rte_vhost_inflight_info_packed *)addr;
inflight_packed->used_wrap_counter = 1;
inflight_packed->old_used_wrap_counter = 1;
for (j = 0; j < queue_size; j++)
inflight_packed->desc[j].next = j + 1;
addr = (void *)((char *)addr + pervq_inflight_size);
}
}
VHOST_LOG_CONFIG(INFO,
"send inflight mmap_size: %"PRIu64"\n",
msg->payload.inflight.mmap_size);
VHOST_LOG_CONFIG(INFO,
"send inflight mmap_offset: %"PRIu64"\n",
msg->payload.inflight.mmap_offset);
VHOST_LOG_CONFIG(INFO,
"send inflight fd: %d\n", msg->fds[0]);
return RTE_VHOST_MSG_RESULT_REPLY;
}
static int
vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg,
int main_fd __rte_unused)
{
uint64_t mmap_size, mmap_offset;
uint16_t num_queues, queue_size;
struct virtio_net *dev = *pdev;
uint32_t pervq_inflight_size;
struct vhost_virtqueue *vq;
void *addr;
int fd, i;
fd = msg->fds[0];
if (msg->size != sizeof(msg->payload.inflight) || fd < 0) {
VHOST_LOG_CONFIG(ERR,
"invalid set_inflight_fd message size is %d,fd is %d\n",
msg->size, fd);
return RTE_VHOST_MSG_RESULT_ERR;
}
mmap_size = msg->payload.inflight.mmap_size;
mmap_offset = msg->payload.inflight.mmap_offset;
num_queues = msg->payload.inflight.num_queues;
queue_size = msg->payload.inflight.queue_size;
if (vq_is_packed(dev))
pervq_inflight_size = get_pervq_shm_size_packed(queue_size);
else
pervq_inflight_size = get_pervq_shm_size_split(queue_size);
VHOST_LOG_CONFIG(INFO,
"set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size);
VHOST_LOG_CONFIG(INFO,
"set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset);
VHOST_LOG_CONFIG(INFO,
"set_inflight_fd num_queues: %u\n", num_queues);
VHOST_LOG_CONFIG(INFO,
"set_inflight_fd queue_size: %u\n", queue_size);
VHOST_LOG_CONFIG(INFO,
"set_inflight_fd fd: %d\n", fd);
VHOST_LOG_CONFIG(INFO,
"set_inflight_fd pervq_inflight_size: %d\n",
pervq_inflight_size);
if (!dev->inflight_info) {
dev->inflight_info = calloc(1,
sizeof(struct inflight_mem_info));
if (dev->inflight_info == NULL) {
VHOST_LOG_CONFIG(ERR,
"failed to alloc dev inflight area\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
dev->inflight_info->fd = -1;
}
if (dev->inflight_info->addr) {
munmap(dev->inflight_info->addr, dev->inflight_info->size);
dev->inflight_info->addr = NULL;
}
addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
fd, mmap_offset);
if (addr == MAP_FAILED) {
VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
if (dev->inflight_info->fd >= 0) {
close(dev->inflight_info->fd);
dev->inflight_info->fd = -1;
}
dev->inflight_info->fd = fd;
dev->inflight_info->addr = addr;
dev->inflight_info->size = mmap_size;
for (i = 0; i < num_queues; i++) {
vq = dev->virtqueue[i];
if (!vq)
continue;
if (vq_is_packed(dev)) {
vq->inflight_packed = addr;
vq->inflight_packed->desc_num = queue_size;
} else {
vq->inflight_split = addr;
vq->inflight_split->desc_num = queue_size;
}
addr = (void *)((char *)addr + pervq_inflight_size);
}
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
int expected_fds;
expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
if (validate_msg_fds(msg, expected_fds) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
file.fd = msg->fds[0];
VHOST_LOG_CONFIG(INFO,
"vring call idx:%d file:%d\n", file.index, file.fd);
vq = dev->virtqueue[file.index];
if (vq->ready) {
vq->ready = 0;
vhost_user_notify_queue_state(dev, file.index, 0);
}
if (vq->callfd >= 0)
close(vq->callfd);
vq->callfd = file.fd;
return RTE_VHOST_MSG_RESULT_OK;
}
static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
int expected_fds;
expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
if (validate_msg_fds(msg, expected_fds) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
close(msg->fds[0]);
VHOST_LOG_CONFIG(INFO, "not implemented\n");
return RTE_VHOST_MSG_RESULT_OK;
}
static int
resubmit_desc_compare(const void *a, const void *b)
{
const struct rte_vhost_resubmit_desc *desc0 = a;
const struct rte_vhost_resubmit_desc *desc1 = b;
if (desc1->counter > desc0->counter)
return 1;
return -1;
}
static int
vhost_check_queue_inflights_split(struct virtio_net *dev,
struct vhost_virtqueue *vq)
{
uint16_t i;
uint16_t resubmit_num = 0, last_io, num;
struct vring_used *used = vq->used;
struct rte_vhost_resubmit_info *resubmit;
struct rte_vhost_inflight_info_split *inflight_split;
if (!(dev->protocol_features &
(1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
return RTE_VHOST_MSG_RESULT_OK;
/* The frontend may still not support the inflight feature
* although we negotiate the protocol feature.
*/
if ((!vq->inflight_split))
return RTE_VHOST_MSG_RESULT_OK;
if (!vq->inflight_split->version) {
vq->inflight_split->version = INFLIGHT_VERSION;
return RTE_VHOST_MSG_RESULT_OK;
}
if (vq->resubmit_inflight)
return RTE_VHOST_MSG_RESULT_OK;
inflight_split = vq->inflight_split;
vq->global_counter = 0;
last_io = inflight_split->last_inflight_io;
if (inflight_split->used_idx != used->idx) {
inflight_split->desc[last_io].inflight = 0;
rte_smp_mb();
inflight_split->used_idx = used->idx;
}
for (i = 0; i < inflight_split->desc_num; i++) {
if (inflight_split->desc[i].inflight == 1)
resubmit_num++;
}
vq->last_avail_idx += resubmit_num;
if (resubmit_num) {
resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
if (!resubmit) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for resubmit info.\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
resubmit->resubmit_list = calloc(resubmit_num,
sizeof(struct rte_vhost_resubmit_desc));
if (!resubmit->resubmit_list) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for inflight desc.\n");
free(resubmit);
return RTE_VHOST_MSG_RESULT_ERR;
}
num = 0;
for (i = 0; i < vq->inflight_split->desc_num; i++) {
if (vq->inflight_split->desc[i].inflight == 1) {
resubmit->resubmit_list[num].index = i;
resubmit->resubmit_list[num].counter =
inflight_split->desc[i].counter;
num++;
}
}
resubmit->resubmit_num = num;
if (resubmit->resubmit_num > 1)
qsort(resubmit->resubmit_list, resubmit->resubmit_num,
sizeof(struct rte_vhost_resubmit_desc),
resubmit_desc_compare);
vq->global_counter = resubmit->resubmit_list[0].counter + 1;
vq->resubmit_inflight = resubmit;
}
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_check_queue_inflights_packed(struct virtio_net *dev,
struct vhost_virtqueue *vq)
{
uint16_t i;
uint16_t resubmit_num = 0, old_used_idx, num;
struct rte_vhost_resubmit_info *resubmit;
struct rte_vhost_inflight_info_packed *inflight_packed;
if (!(dev->protocol_features &
(1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD)))
return RTE_VHOST_MSG_RESULT_OK;
/* The frontend may still not support the inflight feature
* although we negotiate the protocol feature.
*/
if ((!vq->inflight_packed))
return RTE_VHOST_MSG_RESULT_OK;
if (!vq->inflight_packed->version) {
vq->inflight_packed->version = INFLIGHT_VERSION;
return RTE_VHOST_MSG_RESULT_OK;
}
if (vq->resubmit_inflight)
return RTE_VHOST_MSG_RESULT_OK;
inflight_packed = vq->inflight_packed;
vq->global_counter = 0;
old_used_idx = inflight_packed->old_used_idx;
if (inflight_packed->used_idx != old_used_idx) {
if (inflight_packed->desc[old_used_idx].inflight == 0) {
inflight_packed->old_used_idx =
inflight_packed->used_idx;
inflight_packed->old_used_wrap_counter =
inflight_packed->used_wrap_counter;
inflight_packed->old_free_head =
inflight_packed->free_head;
} else {
inflight_packed->used_idx =
inflight_packed->old_used_idx;
inflight_packed->used_wrap_counter =
inflight_packed->old_used_wrap_counter;
inflight_packed->free_head =
inflight_packed->old_free_head;
}
}
for (i = 0; i < inflight_packed->desc_num; i++) {
if (inflight_packed->desc[i].inflight == 1)
resubmit_num++;
}
if (resubmit_num) {
resubmit = calloc(1, sizeof(struct rte_vhost_resubmit_info));
if (resubmit == NULL) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for resubmit info.\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
resubmit->resubmit_list = calloc(resubmit_num,
sizeof(struct rte_vhost_resubmit_desc));
if (resubmit->resubmit_list == NULL) {
VHOST_LOG_CONFIG(ERR,
"failed to allocate memory for resubmit desc.\n");
free(resubmit);
return RTE_VHOST_MSG_RESULT_ERR;
}
num = 0;
for (i = 0; i < inflight_packed->desc_num; i++) {
if (vq->inflight_packed->desc[i].inflight == 1) {
resubmit->resubmit_list[num].index = i;
resubmit->resubmit_list[num].counter =
inflight_packed->desc[i].counter;
num++;
}
}
resubmit->resubmit_num = num;
if (resubmit->resubmit_num > 1)
qsort(resubmit->resubmit_list, resubmit->resubmit_num,
sizeof(struct rte_vhost_resubmit_desc),
resubmit_desc_compare);
vq->global_counter = resubmit->resubmit_list[0].counter + 1;
vq->resubmit_inflight = resubmit;
}
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
int expected_fds;
expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1;
if (validate_msg_fds(msg, expected_fds) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
file.fd = msg->fds[0];
VHOST_LOG_CONFIG(INFO,
"vring kick idx:%d file:%d\n", file.index, file.fd);
/* Interpret ring addresses only when ring is started. */
dev = translate_ring_addresses(dev, file.index);
if (!dev) {
if (file.fd != VIRTIO_INVALID_EVENTFD)
close(file.fd);
return RTE_VHOST_MSG_RESULT_ERR;
}
*pdev = dev;
vq = dev->virtqueue[file.index];
/*
* When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
* the ring starts already enabled. Otherwise, it is enabled via
* the SET_VRING_ENABLE message.
*/
if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
vq->enabled = 1;
if (dev->notify_ops->vring_state_changed)
dev->notify_ops->vring_state_changed(
dev->vid, file.index, 1);
}
if (vq->ready) {
vq->ready = 0;
vhost_user_notify_queue_state(dev, file.index, 0);
}
if (vq->kickfd >= 0)
close(vq->kickfd);
vq->kickfd = file.fd;
if (vq_is_packed(dev)) {
if (vhost_check_queue_inflights_packed(dev, vq)) {
VHOST_LOG_CONFIG(ERR,
"failed to inflights for vq: %d\n", file.index);
return RTE_VHOST_MSG_RESULT_ERR;
}
} else {
if (vhost_check_queue_inflights_split(dev, vq)) {
VHOST_LOG_CONFIG(ERR,
"failed to inflights for vq: %d\n", file.index);
return RTE_VHOST_MSG_RESULT_ERR;
}
}
return RTE_VHOST_MSG_RESULT_OK;
}
/*
* when virtio is stopped, qemu will send us the GET_VRING_BASE message.
*/
static int
vhost_user_get_vring_base(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
uint64_t val;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
/* We have to stop the queue (virtio) if it is running. */
vhost_destroy_device_notify(dev);
dev->flags &= ~VIRTIO_DEV_READY;
dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
/* Here we are safe to get the indexes */
if (vq_is_packed(dev)) {
/*
* Bit[0:14]: avail index
* Bit[15]: avail wrap counter
*/
val = vq->last_avail_idx & 0x7fff;
val |= vq->avail_wrap_counter << 15;
msg->payload.state.num = val;
} else {
msg->payload.state.num = vq->last_avail_idx;
}
VHOST_LOG_CONFIG(INFO,
"vring base idx:%d file:%d\n", msg->payload.state.index,
msg->payload.state.num);
/*
* Based on current qemu vhost-user implementation, this message is
* sent and only sent in vhost_vring_stop.
* TODO: cleanup the vring, it isn't usable since here.
*/
if (vq->kickfd >= 0)
close(vq->kickfd);
vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
if (vq->callfd >= 0)
close(vq->callfd);
vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD;
vq->signalled_used_valid = false;
if (vq_is_packed(dev)) {
rte_free(vq->shadow_used_packed);
vq->shadow_used_packed = NULL;
} else {
rte_free(vq->shadow_used_split);
vq->shadow_used_split = NULL;
if (vq->async_pkts_pending)
rte_free(vq->async_pkts_pending);
if (vq->async_pkts_info)
rte_free(vq->async_pkts_info);
vq->async_pkts_pending = NULL;
vq->async_pkts_info = NULL;
}
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
msg->size = sizeof(msg->payload.state);
msg->fd_num = 0;
vring_invalidate(dev, vq);
return RTE_VHOST_MSG_RESULT_REPLY;
}
/*
* when virtio queues are ready to work, qemu will send us to
* enable the virtio queue pair.
*/
static int
vhost_user_set_vring_enable(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
int enable = (int)msg->payload.state.num;
int index = (int)msg->payload.state.index;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
VHOST_LOG_CONFIG(INFO,
"set queue enable: %d to qp idx: %d\n",
enable, index);
if (enable && dev->virtqueue[index]->async_registered) {
if (dev->virtqueue[index]->async_pkts_inflight_n) {
VHOST_LOG_CONFIG(ERR, "failed to enable vring. "
"async inflight packets must be completed first\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
}
dev->virtqueue[index]->enabled = enable;
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_get_protocol_features(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
uint64_t features, protocol_features;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
rte_vhost_driver_get_features(dev->ifname, &features);
rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
msg->payload.u64 = protocol_features;
msg->size = sizeof(msg->payload.u64);
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_REPLY;
}
static int
vhost_user_set_protocol_features(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
uint64_t protocol_features = msg->payload.u64;
uint64_t slave_protocol_features = 0;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
rte_vhost_driver_get_protocol_features(dev->ifname,
&slave_protocol_features);
if (protocol_features & ~slave_protocol_features) {
VHOST_LOG_CONFIG(ERR,
"(%d) received invalid protocol features.\n",
dev->vid);
return RTE_VHOST_MSG_RESULT_ERR;
}
dev->protocol_features = protocol_features;
VHOST_LOG_CONFIG(INFO,
"negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
dev->protocol_features);
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
int fd = msg->fds[0];
uint64_t size, off;
void *addr;
if (validate_msg_fds(msg, 1) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (fd < 0) {
VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd);
return RTE_VHOST_MSG_RESULT_ERR;
}
if (msg->size != sizeof(VhostUserLog)) {
VHOST_LOG_CONFIG(ERR,
"invalid log base msg size: %"PRId32" != %d\n",
msg->size, (int)sizeof(VhostUserLog));
goto close_msg_fds;
}
size = msg->payload.log.mmap_size;
off = msg->payload.log.mmap_offset;
/* Check for mmap size and offset overflow. */
if (off >= -size) {
VHOST_LOG_CONFIG(ERR,
"log offset %#"PRIx64" and log size %#"PRIx64" overflow\n",
off, size);
goto close_msg_fds;
}
VHOST_LOG_CONFIG(INFO,
"log mmap size: %"PRId64", offset: %"PRId64"\n",
size, off);
/*
* mmap from 0 to workaround a hugepage mmap bug: mmap will
* fail when offset is not page size aligned.
*/
addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
close(fd);
if (addr == MAP_FAILED) {
VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
/*
* Free previously mapped log memory on occasionally
* multiple VHOST_USER_SET_LOG_BASE.
*/
if (dev->log_addr) {
munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
}
dev->log_addr = (uint64_t)(uintptr_t)addr;
dev->log_base = dev->log_addr + off;
dev->log_size = size;
/*
* The spec is not clear about it (yet), but QEMU doesn't expect
* any payload in the reply.
*/
msg->size = 0;
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_REPLY;
close_msg_fds:
close_msg_fds(msg);
return RTE_VHOST_MSG_RESULT_ERR;
}
static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
if (validate_msg_fds(msg, 1) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
close(msg->fds[0]);
VHOST_LOG_CONFIG(INFO, "not implemented.\n");
return RTE_VHOST_MSG_RESULT_OK;
}
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
* not be lost after migration.
*
* However, we don't actually "send" a rarp packet here, instead, we set
* a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
*/
static int
vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
uint8_t *mac = (uint8_t *)&msg->payload.u64;
struct rte_vdpa_device *vdpa_dev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
VHOST_LOG_CONFIG(DEBUG,
":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
memcpy(dev->mac.addr_bytes, mac, 6);
/*
* Set the flag to inject a RARP broadcast packet at
* rte_vhost_dequeue_burst().
*
* __ATOMIC_RELEASE ordering is for making sure the mac is
* copied before the flag is set.
*/
__atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE);
vdpa_dev = dev->vdpa_dev;
if (vdpa_dev && vdpa_dev->ops->migration_done)
vdpa_dev->ops->migration_done(dev->vid);
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (msg->payload.u64 < VIRTIO_MIN_MTU ||
msg->payload.u64 > VIRTIO_MAX_MTU) {
VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n",
msg->payload.u64);
return RTE_VHOST_MSG_RESULT_ERR;
}
dev->mtu = msg->payload.u64;
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
int fd = msg->fds[0];
if (validate_msg_fds(msg, 1) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (fd < 0) {
VHOST_LOG_CONFIG(ERR,
"Invalid file descriptor for slave channel (%d)\n",
fd);
return RTE_VHOST_MSG_RESULT_ERR;
}
if (dev->slave_req_fd >= 0)
close(dev->slave_req_fd);
dev->slave_req_fd = fd;
return RTE_VHOST_MSG_RESULT_OK;
}
static int
is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
{
struct vhost_vring_addr *ra;
uint64_t start, end, len;
start = imsg->iova;
end = start + imsg->size;
ra = &vq->ring_addrs;
len = sizeof(struct vring_desc) * vq->size;
if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
return 1;
len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size;
if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
return 1;
len = sizeof(struct vring_used) +
sizeof(struct vring_used_elem) * vq->size;
if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
return 1;
if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
len = sizeof(uint64_t);
if (ra->log_guest_addr < end &&
(ra->log_guest_addr + len) > start)
return 1;
}
return 0;
}
static int
is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
{
struct vhost_vring_addr *ra;
uint64_t start, end, len;
start = imsg->iova;
end = start + imsg->size;
ra = &vq->ring_addrs;
len = sizeof(struct vring_packed_desc) * vq->size;
if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start)
return 1;
len = sizeof(struct vring_packed_desc_event);
if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start)
return 1;
len = sizeof(struct vring_packed_desc_event);
if (ra->used_user_addr < end && (ra->used_user_addr + len) > start)
return 1;
if (ra->flags & (1 << VHOST_VRING_F_LOG)) {
len = sizeof(uint64_t);
if (ra->log_guest_addr < end &&
(ra->log_guest_addr + len) > start)
return 1;
}
return 0;
}
static int is_vring_iotlb(struct virtio_net *dev,
struct vhost_virtqueue *vq,
struct vhost_iotlb_msg *imsg)
{
if (vq_is_packed(dev))
return is_vring_iotlb_packed(vq, imsg);
else
return is_vring_iotlb_split(vq, imsg);
}
static int
vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
uint16_t i;
uint64_t vva, len;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
switch (imsg->type) {
case VHOST_IOTLB_UPDATE:
len = imsg->size;
vva = qva_to_vva(dev, imsg->uaddr, &len);
if (!vva)
return RTE_VHOST_MSG_RESULT_ERR;
for (i = 0; i < dev->nr_vring; i++) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
if (!vq)
continue;
vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
len, imsg->perm);
if (is_vring_iotlb(dev, vq, imsg))
*pdev = dev = translate_ring_addresses(dev, i);
}
break;
case VHOST_IOTLB_INVALIDATE:
for (i = 0; i < dev->nr_vring; i++) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
if (!vq)
continue;
vhost_user_iotlb_cache_remove(vq, imsg->iova,
imsg->size);
if (is_vring_iotlb(dev, vq, imsg))
vring_invalidate(dev, vq);
}
break;
default:
VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n",
imsg->type);
return RTE_VHOST_MSG_RESULT_ERR;
}
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_set_postcopy_advise(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
#ifdef RTE_LIBRTE_VHOST_POSTCOPY
struct uffdio_api api_struct;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
if (dev->postcopy_ufd == -1) {
VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n",
strerror(errno));
return RTE_VHOST_MSG_RESULT_ERR;
}
api_struct.api = UFFD_API;
api_struct.features = 0;
if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n",
strerror(errno));
close(dev->postcopy_ufd);
dev->postcopy_ufd = -1;
return RTE_VHOST_MSG_RESULT_ERR;
}
msg->fds[0] = dev->postcopy_ufd;
msg->fd_num = 1;
return RTE_VHOST_MSG_RESULT_REPLY;
#else
dev->postcopy_ufd = -1;
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_ERR;
#endif
}
static int
vhost_user_set_postcopy_listen(struct virtio_net **pdev,
struct VhostUserMsg *msg __rte_unused,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
if (dev->mem && dev->mem->nregions) {
VHOST_LOG_CONFIG(ERR,
"Regions already registered at postcopy-listen\n");
return RTE_VHOST_MSG_RESULT_ERR;
}
dev->postcopy_listening = 1;
return RTE_VHOST_MSG_RESULT_OK;
}
static int
vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
dev->postcopy_listening = 0;
if (dev->postcopy_ufd >= 0) {
close(dev->postcopy_ufd);
dev->postcopy_ufd = -1;
}
msg->payload.u64 = 0;
msg->size = sizeof(msg->payload.u64);
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_REPLY;
}
static int
vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
msg->payload.u64 = dev->status;
msg->size = sizeof(msg->payload.u64);
msg->fd_num = 0;
return RTE_VHOST_MSG_RESULT_REPLY;
}
static int
vhost_user_set_status(struct virtio_net **pdev, struct VhostUserMsg *msg,
int main_fd __rte_unused)
{
struct virtio_net *dev = *pdev;
if (validate_msg_fds(msg, 0) != 0)
return RTE_VHOST_MSG_RESULT_ERR;
/* As per Virtio specification, the device status is 8bits long */
if (msg->payload.u64 > UINT8_MAX) {
VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n",
msg->payload.u64);
return RTE_VHOST_MSG_RESULT_ERR;
}
dev->status = msg->payload.u64;
if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) &&
(dev->flags & VIRTIO_DEV_FEATURES_FAILED)) {
VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n");
/*
* Clear the bit to let the driver know about the feature
* negotiation failure
*/
dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK;
}
VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n"
"\t-RESET: %u\n"
"\t-ACKNOWLEDGE: %u\n"
"\t-DRIVER: %u\n"
"\t-FEATURES_OK: %u\n"
"\t-DRIVER_OK: %u\n"
"\t-DEVICE_NEED_RESET: %u\n"
"\t-FAILED: %u\n",
dev->status,
(dev->status == VIRTIO_DEVICE_STATUS_RESET),
!!(dev->status & VIRTIO_DEVICE_STATUS_ACK),
!!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER),
!!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK),
!!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK),
!!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET),
!!(dev->status & VIRTIO_DEVICE_STATUS_FAILED));
return RTE_VHOST_MSG_RESULT_OK;
}
typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
struct VhostUserMsg *msg,
int main_fd);
static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
[VHOST_USER_NONE] = NULL,
[VHOST_USER_GET_FEATURES] = vhost_user_get_features,
[VHOST_USER_SET_FEATURES] = vhost_user_set_features,
[VHOST_USER_SET_OWNER] = vhost_user_set_owner,
[VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
[VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
[VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
[VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
[VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
[VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
[VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
[VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
[VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
[VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
[VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
[VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
[VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
[VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
[VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
[VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
[VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
[VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
[VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
[VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
[VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
[VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
[VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd,
[VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd,
[VHOST_USER_SET_STATUS] = vhost_user_set_status,
[VHOST_USER_GET_STATUS] = vhost_user_get_status,
};
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
{
int ret;
ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num);
if (ret <= 0) {
return ret;
} else if (ret != VHOST_USER_HDR_SIZE) {
VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n");
close_msg_fds(msg);
return -1;
}
if (msg->size) {
if (msg->size > sizeof(msg->payload)) {
VHOST_LOG_CONFIG(ERR,
"invalid msg size: %d\n", msg->size);
return -1;
}
ret = read(sockfd, &msg->payload, msg->size);
if (ret <= 0)
return ret;
if (ret != (int)msg->size) {
VHOST_LOG_CONFIG(ERR,
"read control message failed\n");
return -1;
}
}
return ret;
}
static int
send_vhost_message(int sockfd, struct VhostUserMsg *msg)
{
if (!msg)
return 0;
return send_fd_message(sockfd, (char *)msg,
VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
}
static int
send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
{
if (!msg)
return 0;
msg->flags &= ~VHOST_USER_VERSION_MASK;
msg->flags &= ~VHOST_USER_NEED_REPLY;
msg->flags |= VHOST_USER_VERSION;
msg->flags |= VHOST_USER_REPLY_MASK;
return send_vhost_message(sockfd, msg);
}
static int
send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
{
int ret;
if (msg->flags & VHOST_USER_NEED_REPLY)
rte_spinlock_lock(&dev->slave_req_lock);
ret = send_vhost_message(dev->slave_req_fd, msg);
if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
rte_spinlock_unlock(&dev->slave_req_lock);
return ret;
}
/*
* Allocate a queue pair if it hasn't been allocated yet
*/
static int
vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev,
struct VhostUserMsg *msg)
{
uint32_t vring_idx;
switch (msg->request.master) {
case VHOST_USER_SET_VRING_KICK:
case VHOST_USER_SET_VRING_CALL:
case VHOST_USER_SET_VRING_ERR:
vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
break;
case VHOST_USER_SET_VRING_NUM:
case VHOST_USER_SET_VRING_BASE:
case VHOST_USER_SET_VRING_ENABLE:
vring_idx = msg->payload.state.index;
break;
case VHOST_USER_SET_VRING_ADDR:
vring_idx = msg->payload.addr.index;
break;
default:
return 0;
}
if (vring_idx >= VHOST_MAX_VRING) {
VHOST_LOG_CONFIG(ERR,
"invalid vring index: %u\n", vring_idx);
return -1;
}
if (dev->virtqueue[vring_idx])
return 0;
return alloc_vring_queue(dev, vring_idx);
}
static void
vhost_user_lock_all_queue_pairs(struct virtio_net *dev)
{
unsigned int i = 0;
unsigned int vq_num = 0;
while (vq_num < dev->nr_vring) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
if (vq) {
rte_spinlock_lock(&vq->access_lock);
vq_num++;
}
i++;
}
}
static void
vhost_user_unlock_all_queue_pairs(struct virtio_net *dev)
{
unsigned int i = 0;
unsigned int vq_num = 0;
while (vq_num < dev->nr_vring) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
if (vq) {
rte_spinlock_unlock(&vq->access_lock);
vq_num++;
}
i++;
}
}
int
vhost_user_msg_handler(int vid, int fd)
{
struct virtio_net *dev;
struct VhostUserMsg msg;
struct rte_vdpa_device *vdpa_dev;
int ret;
int unlock_required = 0;
bool handled;
int request;
uint32_t i;
dev = get_device(vid);
if (dev == NULL)
return -1;
if (!dev->notify_ops) {
dev->notify_ops = vhost_driver_callback_get(dev->ifname);
if (!dev->notify_ops) {
VHOST_LOG_CONFIG(ERR,
"failed to get callback ops for driver %s\n",
dev->ifname);
return -1;
}
}
ret = read_vhost_message(fd, &msg);
if (ret <= 0) {
if (ret < 0)
VHOST_LOG_CONFIG(ERR,
"vhost read message failed\n");
else
VHOST_LOG_CONFIG(INFO,
"vhost peer closed\n");
return -1;
}
ret = 0;
request = msg.request.master;
if (request > VHOST_USER_NONE && request < VHOST_USER_MAX &&
vhost_message_str[request]) {
if (request != VHOST_USER_IOTLB_MSG)
VHOST_LOG_CONFIG(INFO, "read message %s\n",
vhost_message_str[request]);
else
VHOST_LOG_CONFIG(DEBUG, "read message %s\n",
vhost_message_str[request]);
} else {
VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request);
}
ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
if (ret < 0) {
VHOST_LOG_CONFIG(ERR,
"failed to alloc queue\n");
return -1;
}
/*
* Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE
* and VHOST_USER_RESET_OWNER, since it is sent when virtio stops
* and device is destroyed. destroy_device waits for queues to be
* inactive, so it is safe. Otherwise taking the access_lock
* would cause a dead lock.
*/
switch (request) {
case VHOST_USER_SET_FEATURES:
case VHOST_USER_SET_PROTOCOL_FEATURES:
case VHOST_USER_SET_OWNER:
case VHOST_USER_SET_MEM_TABLE:
case VHOST_USER_SET_LOG_BASE:
case VHOST_USER_SET_LOG_FD:
case VHOST_USER_SET_VRING_NUM:
case VHOST_USER_SET_VRING_ADDR:
case VHOST_USER_SET_VRING_BASE:
case VHOST_USER_SET_VRING_KICK:
case VHOST_USER_SET_VRING_CALL:
case VHOST_USER_SET_VRING_ERR:
case VHOST_USER_SET_VRING_ENABLE:
case VHOST_USER_SEND_RARP:
case VHOST_USER_NET_SET_MTU:
case VHOST_USER_SET_SLAVE_REQ_FD:
if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
vhost_user_lock_all_queue_pairs(dev);
unlock_required = 1;
}
break;
default:
break;
}
handled = false;
if (dev->extern_ops.pre_msg_handle) {
ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
(void *)&msg);
switch (ret) {
case RTE_VHOST_MSG_RESULT_REPLY:
send_vhost_reply(fd, &msg);
/* Fall-through */
case RTE_VHOST_MSG_RESULT_ERR:
case RTE_VHOST_MSG_RESULT_OK:
handled = true;
goto skip_to_post_handle;
case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
default:
break;
}
}
if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) {
if (!vhost_message_handlers[request])
goto skip_to_post_handle;
ret = vhost_message_handlers[request](&dev, &msg, fd);
switch (ret) {
case RTE_VHOST_MSG_RESULT_ERR:
VHOST_LOG_CONFIG(ERR,
"Processing %s failed.\n",
vhost_message_str[request]);
handled = true;
break;
case RTE_VHOST_MSG_RESULT_OK:
VHOST_LOG_CONFIG(DEBUG,
"Processing %s succeeded.\n",
vhost_message_str[request]);
handled = true;
break;
case RTE_VHOST_MSG_RESULT_REPLY:
VHOST_LOG_CONFIG(DEBUG,
"Processing %s succeeded and needs reply.\n",
vhost_message_str[request]);
send_vhost_reply(fd, &msg);
handled = true;
break;
default:
break;
}
}
skip_to_post_handle:
if (ret != RTE_VHOST_MSG_RESULT_ERR &&
dev->extern_ops.post_msg_handle) {
ret = (*dev->extern_ops.post_msg_handle)(dev->vid,
(void *)&msg);
switch (ret) {
case RTE_VHOST_MSG_RESULT_REPLY:
send_vhost_reply(fd, &msg);
/* Fall-through */
case RTE_VHOST_MSG_RESULT_ERR:
case RTE_VHOST_MSG_RESULT_OK:
handled = true;
case RTE_VHOST_MSG_RESULT_NOT_HANDLED:
default:
break;
}
}
if (unlock_required)
vhost_user_unlock_all_queue_pairs(dev);
/* If message was not handled at this stage, treat it as an error */
if (!handled) {
VHOST_LOG_CONFIG(ERR,
"vhost message (req: %d) was not handled.\n", request);
close_msg_fds(&msg);
ret = RTE_VHOST_MSG_RESULT_ERR;
}
/*
* If the request required a reply that was already sent,
* this optional reply-ack won't be sent as the
* VHOST_USER_NEED_REPLY was cleared in send_vhost_reply().
*/
if (msg.flags & VHOST_USER_NEED_REPLY) {
msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR;
msg.size = sizeof(msg.payload.u64);
msg.fd_num = 0;
send_vhost_reply(fd, &msg);
} else if (ret == RTE_VHOST_MSG_RESULT_ERR) {
VHOST_LOG_CONFIG(ERR,
"vhost message handling failed.\n");
return -1;
}
for (i = 0; i < dev->nr_vring; i++) {
struct vhost_virtqueue *vq = dev->virtqueue[i];
bool cur_ready = vq_is_ready(dev, vq);
if (cur_ready != (vq && vq->ready)) {
vq->ready = cur_ready;
vhost_user_notify_queue_state(dev, i, cur_ready);
}
}
if (!virtio_is_ready(dev))
goto out;
/*
* Virtio is now ready. If not done already, it is time
* to notify the application it can process the rings and
* configure the vDPA device if present.
*/
if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
if (dev->notify_ops->new_device(dev->vid) == 0)
dev->flags |= VIRTIO_DEV_RUNNING;
}
vdpa_dev = dev->vdpa_dev;
if (!vdpa_dev)
goto out;
if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) {
if (vdpa_dev->ops->dev_conf(dev->vid))
VHOST_LOG_CONFIG(ERR,
"Failed to configure vDPA device\n");
else
dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
}
out:
return 0;
}
static int process_slave_message_reply(struct virtio_net *dev,
const struct VhostUserMsg *msg)
{
struct VhostUserMsg msg_reply;
int ret;
if ((msg->flags & VHOST_USER_NEED_REPLY) == 0)
return 0;
ret = read_vhost_message(dev->slave_req_fd, &msg_reply);
if (ret <= 0) {
if (ret < 0)
VHOST_LOG_CONFIG(ERR,
"vhost read slave message reply failed\n");
else
VHOST_LOG_CONFIG(INFO,
"vhost peer closed\n");
ret = -1;
goto out;
}
ret = 0;
if (msg_reply.request.slave != msg->request.slave) {
VHOST_LOG_CONFIG(ERR,
"Received unexpected msg type (%u), expected %u\n",
msg_reply.request.slave, msg->request.slave);
ret = -1;
goto out;
}
ret = msg_reply.payload.u64 ? -1 : 0;
out:
rte_spinlock_unlock(&dev->slave_req_lock);
return ret;
}
int
vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
{
int ret;
struct VhostUserMsg msg = {
.request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
.flags = VHOST_USER_VERSION,
.size = sizeof(msg.payload.iotlb),
.payload.iotlb = {
.iova = iova,
.perm = perm,
.type = VHOST_IOTLB_MISS,
},
};
ret = send_vhost_message(dev->slave_req_fd, &msg);
if (ret < 0) {
VHOST_LOG_CONFIG(ERR,
"Failed to send IOTLB miss message (%d)\n",
ret);
return ret;
}
return 0;
}
static int
vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
{
int ret;
struct VhostUserMsg msg = {
.request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
.flags = VHOST_USER_VERSION,
.size = 0,
};
if (need_reply)
msg.flags |= VHOST_USER_NEED_REPLY;
ret = send_vhost_slave_message(dev, &msg);
if (ret < 0) {
VHOST_LOG_CONFIG(ERR,
"Failed to send config change (%d)\n",
ret);
return ret;
}
return process_slave_message_reply(dev, &msg);
}
int
rte_vhost_slave_config_change(int vid, bool need_reply)
{
struct virtio_net *dev;
dev = get_device(vid);
if (!dev)
return -ENODEV;
return vhost_user_slave_config_change(dev, need_reply);
}
static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
int index, int fd,
uint64_t offset,
uint64_t size)
{
int ret;
struct VhostUserMsg msg = {
.request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
.flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY,
.size = sizeof(msg.payload.area),
.payload.area = {
.u64 = index & VHOST_USER_VRING_IDX_MASK,
.size = size,
.offset = offset,
},
};
if (fd < 0)
msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
else {
msg.fds[0] = fd;
msg.fd_num = 1;
}
ret = send_vhost_slave_message(dev, &msg);
if (ret < 0) {
VHOST_LOG_CONFIG(ERR,
"Failed to set host notifier (%d)\n", ret);
return ret;
}
return process_slave_message_reply(dev, &msg);
}
int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable)
{
struct virtio_net *dev;
struct rte_vdpa_device *vdpa_dev;
int vfio_device_fd, ret = 0;
uint64_t offset, size;
unsigned int i, q_start, q_last;
dev = get_device(vid);
if (!dev)
return -ENODEV;
vdpa_dev = dev->vdpa_dev;
if (vdpa_dev == NULL)
return -ENODEV;
if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ||
!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) ||
!(dev->protocol_features &
(1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) ||
!(dev->protocol_features &
(1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) ||
!(dev->protocol_features &
(1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER)))
return -ENOTSUP;
if (qid == RTE_VHOST_QUEUE_ALL) {
q_start = 0;
q_last = dev->nr_vring - 1;
} else {
if (qid >= dev->nr_vring)
return -EINVAL;
q_start = qid;
q_last = qid;
}
RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP);
RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP);
vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid);
if (vfio_device_fd < 0)
return -ENOTSUP;
if (enable) {
for (i = q_start; i <= q_last; i++) {
if (vdpa_dev->ops->get_notify_area(vid, i, &offset,
&size) < 0) {
ret = -ENOTSUP;
goto disable;
}
if (vhost_user_slave_set_vring_host_notifier(dev, i,
vfio_device_fd, offset, size) < 0) {
ret = -EFAULT;
goto disable;
}
}
} else {
disable:
for (i = q_start; i <= q_last; i++) {
vhost_user_slave_set_vring_host_notifier(dev, i, -1,
0, 0);
}
}
return ret;
}