e80a987081
This patch adds session message handler to vhost crypto. Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com> Acked-by: Jay Zhou <jianjay.zhou@huawei.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
1704 lines
41 KiB
C
1704 lines
41 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2018 Intel Corporation
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*/
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/* Security model
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* --------------
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* The vhost-user protocol connection is an external interface, so it must be
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* robust against invalid inputs.
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*
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* This is important because the vhost-user master is only one step removed
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* from the guest. Malicious guests that have escaped will then launch further
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* attacks from the vhost-user master.
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*
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* Even in deployments where guests are trusted, a bug in the vhost-user master
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* can still cause invalid messages to be sent. Such messages must not
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* compromise the stability of the DPDK application by causing crashes, memory
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* corruption, or other problematic behavior.
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*
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* Do not assume received VhostUserMsg fields contain sensible values!
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <assert.h>
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#ifdef RTE_LIBRTE_VHOST_NUMA
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#include <numaif.h>
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#endif
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#include <rte_common.h>
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#include <rte_malloc.h>
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#include <rte_log.h>
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#include "iotlb.h"
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#include "vhost.h"
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#include "vhost_user.h"
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#define VIRTIO_MIN_MTU 68
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#define VIRTIO_MAX_MTU 65535
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static const char *vhost_message_str[VHOST_USER_MAX] = {
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[VHOST_USER_NONE] = "VHOST_USER_NONE",
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[VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
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[VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
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[VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
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[VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
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[VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
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[VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
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[VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
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[VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
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[VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
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[VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
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[VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
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[VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
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[VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
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[VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR",
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[VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES",
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[VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES",
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[VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM",
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[VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE",
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[VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP",
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[VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU",
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[VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD",
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[VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG",
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[VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
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[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
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};
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static uint64_t
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get_blk_size(int fd)
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{
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struct stat stat;
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int ret;
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ret = fstat(fd, &stat);
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return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
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}
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static void
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free_mem_region(struct virtio_net *dev)
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{
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uint32_t i;
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struct rte_vhost_mem_region *reg;
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if (!dev || !dev->mem)
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return;
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for (i = 0; i < dev->mem->nregions; i++) {
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reg = &dev->mem->regions[i];
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if (reg->host_user_addr) {
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munmap(reg->mmap_addr, reg->mmap_size);
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close(reg->fd);
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}
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}
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}
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void
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vhost_backend_cleanup(struct virtio_net *dev)
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{
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if (dev->mem) {
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free_mem_region(dev);
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rte_free(dev->mem);
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dev->mem = NULL;
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}
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free(dev->guest_pages);
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dev->guest_pages = NULL;
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if (dev->log_addr) {
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munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
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dev->log_addr = 0;
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}
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if (dev->slave_req_fd >= 0) {
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close(dev->slave_req_fd);
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dev->slave_req_fd = -1;
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}
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}
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/*
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* This function just returns success at the moment unless
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* the device hasn't been initialised.
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*/
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static int
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vhost_user_set_owner(void)
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{
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return 0;
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}
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static int
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vhost_user_reset_owner(struct virtio_net *dev)
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{
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struct rte_vdpa_device *vdpa_dev;
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int did = -1;
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if (dev->flags & VIRTIO_DEV_RUNNING) {
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did = dev->vdpa_dev_id;
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vdpa_dev = rte_vdpa_get_device(did);
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if (vdpa_dev && vdpa_dev->ops->dev_close)
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vdpa_dev->ops->dev_close(dev->vid);
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dev->flags &= ~VIRTIO_DEV_RUNNING;
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dev->notify_ops->destroy_device(dev->vid);
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}
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cleanup_device(dev, 0);
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reset_device(dev);
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return 0;
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}
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/*
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* The features that we support are requested.
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*/
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static uint64_t
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vhost_user_get_features(struct virtio_net *dev)
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{
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uint64_t features = 0;
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rte_vhost_driver_get_features(dev->ifname, &features);
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return features;
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}
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/*
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* The queue number that we support are requested.
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*/
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static uint32_t
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vhost_user_get_queue_num(struct virtio_net *dev)
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{
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uint32_t queue_num = 0;
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rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
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return queue_num;
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}
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/*
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* We receive the negotiated features supported by us and the virtio device.
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*/
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static int
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vhost_user_set_features(struct virtio_net *dev, uint64_t features)
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{
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uint64_t vhost_features = 0;
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struct rte_vdpa_device *vdpa_dev;
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int did = -1;
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rte_vhost_driver_get_features(dev->ifname, &vhost_features);
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if (features & ~vhost_features) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"(%d) received invalid negotiated features.\n",
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dev->vid);
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return -1;
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}
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if (dev->flags & VIRTIO_DEV_RUNNING) {
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if (dev->features == features)
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return 0;
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/*
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* Error out if master tries to change features while device is
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* in running state. The exception being VHOST_F_LOG_ALL, which
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* is enabled when the live-migration starts.
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*/
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if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"(%d) features changed while device is running.\n",
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dev->vid);
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return -1;
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}
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if (dev->notify_ops->features_changed)
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dev->notify_ops->features_changed(dev->vid, features);
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}
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did = dev->vdpa_dev_id;
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vdpa_dev = rte_vdpa_get_device(did);
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if (vdpa_dev && vdpa_dev->ops->set_features)
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vdpa_dev->ops->set_features(dev->vid);
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dev->features = features;
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if (dev->features &
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((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
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dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
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} else {
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dev->vhost_hlen = sizeof(struct virtio_net_hdr);
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}
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VHOST_LOG_DEBUG(VHOST_CONFIG,
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"(%d) mergeable RX buffers %s, virtio 1 %s\n",
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dev->vid,
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(dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
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(dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
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if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) &&
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!(dev->features & (1ULL << VIRTIO_NET_F_MQ))) {
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/*
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* Remove all but first queue pair if MQ hasn't been
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* negotiated. This is safe because the device is not
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* running at this stage.
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*/
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while (dev->nr_vring > 2) {
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struct vhost_virtqueue *vq;
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vq = dev->virtqueue[--dev->nr_vring];
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if (!vq)
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continue;
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dev->virtqueue[dev->nr_vring] = NULL;
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cleanup_vq(vq, 1);
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free_vq(vq);
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}
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}
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return 0;
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}
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/*
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* The virtio device sends us the size of the descriptor ring.
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*/
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static int
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vhost_user_set_vring_num(struct virtio_net *dev,
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VhostUserMsg *msg)
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{
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struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
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vq->size = msg->payload.state.num;
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/* VIRTIO 1.0, 2.4 Virtqueues says:
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*
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* Queue Size value is always a power of 2. The maximum Queue Size
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* value is 32768.
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*/
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if ((vq->size & (vq->size - 1)) || vq->size > 32768) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"invalid virtqueue size %u\n", vq->size);
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return -1;
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}
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if (dev->dequeue_zero_copy) {
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vq->nr_zmbuf = 0;
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vq->last_zmbuf_idx = 0;
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vq->zmbuf_size = vq->size;
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vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
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sizeof(struct zcopy_mbuf), 0);
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if (vq->zmbufs == NULL) {
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RTE_LOG(WARNING, VHOST_CONFIG,
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"failed to allocate mem for zero copy; "
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"zero copy is force disabled\n");
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dev->dequeue_zero_copy = 0;
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}
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TAILQ_INIT(&vq->zmbuf_list);
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}
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vq->shadow_used_ring = rte_malloc(NULL,
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vq->size * sizeof(struct vring_used_elem),
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RTE_CACHE_LINE_SIZE);
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if (!vq->shadow_used_ring) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to allocate memory for shadow used ring.\n");
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return -1;
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}
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vq->batch_copy_elems = rte_malloc(NULL,
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vq->size * sizeof(struct batch_copy_elem),
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RTE_CACHE_LINE_SIZE);
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if (!vq->batch_copy_elems) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to allocate memory for batching copy.\n");
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return -1;
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}
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return 0;
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}
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/*
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* Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
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* same numa node as the memory of vring descriptor.
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*/
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#ifdef RTE_LIBRTE_VHOST_NUMA
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static struct virtio_net*
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numa_realloc(struct virtio_net *dev, int index)
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{
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int oldnode, newnode;
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struct virtio_net *old_dev;
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struct vhost_virtqueue *old_vq, *vq;
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struct zcopy_mbuf *new_zmbuf;
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struct vring_used_elem *new_shadow_used_ring;
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struct batch_copy_elem *new_batch_copy_elems;
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int ret;
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old_dev = dev;
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vq = old_vq = dev->virtqueue[index];
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ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
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MPOL_F_NODE | MPOL_F_ADDR);
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/* check if we need to reallocate vq */
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ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
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MPOL_F_NODE | MPOL_F_ADDR);
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if (ret) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"Unable to get vq numa information.\n");
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return dev;
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}
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if (oldnode != newnode) {
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RTE_LOG(INFO, VHOST_CONFIG,
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"reallocate vq from %d to %d node\n", oldnode, newnode);
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vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
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if (!vq)
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return dev;
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memcpy(vq, old_vq, sizeof(*vq));
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TAILQ_INIT(&vq->zmbuf_list);
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new_zmbuf = rte_malloc_socket(NULL, vq->zmbuf_size *
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sizeof(struct zcopy_mbuf), 0, newnode);
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if (new_zmbuf) {
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rte_free(vq->zmbufs);
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vq->zmbufs = new_zmbuf;
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}
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new_shadow_used_ring = rte_malloc_socket(NULL,
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vq->size * sizeof(struct vring_used_elem),
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RTE_CACHE_LINE_SIZE,
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newnode);
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if (new_shadow_used_ring) {
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rte_free(vq->shadow_used_ring);
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vq->shadow_used_ring = new_shadow_used_ring;
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}
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new_batch_copy_elems = rte_malloc_socket(NULL,
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vq->size * sizeof(struct batch_copy_elem),
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RTE_CACHE_LINE_SIZE,
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newnode);
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if (new_batch_copy_elems) {
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rte_free(vq->batch_copy_elems);
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vq->batch_copy_elems = new_batch_copy_elems;
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}
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rte_free(old_vq);
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}
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/* check if we need to reallocate dev */
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ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
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MPOL_F_NODE | MPOL_F_ADDR);
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if (ret) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"Unable to get dev numa information.\n");
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goto out;
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}
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if (oldnode != newnode) {
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RTE_LOG(INFO, VHOST_CONFIG,
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"reallocate dev from %d to %d node\n",
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oldnode, newnode);
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dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
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if (!dev) {
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dev = old_dev;
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goto out;
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}
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memcpy(dev, old_dev, sizeof(*dev));
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rte_free(old_dev);
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}
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out:
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dev->virtqueue[index] = vq;
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vhost_devices[dev->vid] = dev;
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if (old_vq != vq)
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vhost_user_iotlb_init(dev, index);
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return dev;
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}
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#else
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static struct virtio_net*
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numa_realloc(struct virtio_net *dev, int index __rte_unused)
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{
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return dev;
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}
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#endif
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/* Converts QEMU virtual address to Vhost virtual address. */
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static uint64_t
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qva_to_vva(struct virtio_net *dev, uint64_t qva)
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{
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struct rte_vhost_mem_region *reg;
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uint32_t i;
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/* Find the region where the address lives. */
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for (i = 0; i < dev->mem->nregions; i++) {
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reg = &dev->mem->regions[i];
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if (qva >= reg->guest_user_addr &&
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qva < reg->guest_user_addr + reg->size) {
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return qva - reg->guest_user_addr +
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reg->host_user_addr;
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}
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}
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return 0;
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}
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|
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/*
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* Converts ring address to Vhost virtual address.
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* If IOMMU is enabled, the ring address is a guest IO virtual address,
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* else it is a QEMU virtual address.
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*/
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static uint64_t
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ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
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uint64_t ra, uint64_t size)
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{
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if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
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uint64_t vva;
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vva = vhost_user_iotlb_cache_find(vq, ra,
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&size, VHOST_ACCESS_RW);
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if (!vva)
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vhost_user_iotlb_miss(dev, ra, VHOST_ACCESS_RW);
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return vva;
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}
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return qva_to_vva(dev, ra);
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}
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|
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static struct virtio_net *
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translate_ring_addresses(struct virtio_net *dev, int vq_index)
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{
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struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
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struct vhost_vring_addr *addr = &vq->ring_addrs;
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/* The addresses are converted from QEMU virtual to Vhost virtual. */
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if (vq->desc && vq->avail && vq->used)
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return dev;
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vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
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vq, addr->desc_user_addr, sizeof(struct vring_desc));
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if (vq->desc == 0) {
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RTE_LOG(DEBUG, VHOST_CONFIG,
|
|
"(%d) failed to find desc ring address.\n",
|
|
dev->vid);
|
|
return dev;
|
|
}
|
|
|
|
dev = numa_realloc(dev, vq_index);
|
|
vq = dev->virtqueue[vq_index];
|
|
addr = &vq->ring_addrs;
|
|
|
|
vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
|
|
vq, addr->avail_user_addr, sizeof(struct vring_avail));
|
|
if (vq->avail == 0) {
|
|
RTE_LOG(DEBUG, VHOST_CONFIG,
|
|
"(%d) failed to find avail ring address.\n",
|
|
dev->vid);
|
|
return dev;
|
|
}
|
|
|
|
vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
|
|
vq, addr->used_user_addr, sizeof(struct vring_used));
|
|
if (vq->used == 0) {
|
|
RTE_LOG(DEBUG, VHOST_CONFIG,
|
|
"(%d) failed to find used ring address.\n",
|
|
dev->vid);
|
|
return dev;
|
|
}
|
|
|
|
if (vq->last_used_idx != vq->used->idx) {
|
|
RTE_LOG(WARNING, VHOST_CONFIG,
|
|
"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->log_guest_addr = addr->log_guest_addr;
|
|
|
|
VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
|
|
dev->vid, vq->desc);
|
|
VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
|
|
dev->vid, vq->avail);
|
|
VHOST_LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
|
|
dev->vid, vq->used);
|
|
VHOST_LOG_DEBUG(VHOST_CONFIG, "(%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, VhostUserMsg *msg)
|
|
{
|
|
struct vhost_virtqueue *vq;
|
|
struct vhost_vring_addr *addr = &msg->payload.addr;
|
|
struct virtio_net *dev = *pdev;
|
|
|
|
if (dev->mem == NULL)
|
|
return -1;
|
|
|
|
/* addr->index refers to the queue index. The txq 1, rxq is 0. */
|
|
vq = dev->virtqueue[msg->payload.addr.index];
|
|
|
|
/*
|
|
* 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))) {
|
|
dev = translate_ring_addresses(dev, msg->payload.addr.index);
|
|
if (!dev)
|
|
return -1;
|
|
|
|
*pdev = dev;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The virtio device sends us the available ring last used index.
|
|
*/
|
|
static int
|
|
vhost_user_set_vring_base(struct virtio_net *dev,
|
|
VhostUserMsg *msg)
|
|
{
|
|
dev->virtqueue[msg->payload.state.index]->last_used_idx =
|
|
msg->payload.state.num;
|
|
dev->virtqueue[msg->payload.state.index]->last_avail_idx =
|
|
msg->payload.state.num;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
if (dev->nr_guest_pages == dev->max_guest_pages) {
|
|
dev->max_guest_pages *= 2;
|
|
dev->guest_pages = realloc(dev->guest_pages,
|
|
dev->max_guest_pages * sizeof(*page));
|
|
if (!dev->guest_pages) {
|
|
RTE_LOG(ERR, VHOST_CONFIG, "cannot realloc guest_pages\n");
|
|
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;
|
|
}
|
|
|
|
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];
|
|
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"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 *dev, struct VhostUserMsg *pmsg)
|
|
{
|
|
struct VhostUserMemory memory = pmsg->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;
|
|
int fd;
|
|
|
|
if (memory.nregions > VHOST_MEMORY_MAX_NREGIONS) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"too many memory regions (%u)\n", memory.nregions);
|
|
return -1;
|
|
}
|
|
|
|
if (dev->mem && !vhost_memory_changed(&memory, dev->mem)) {
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"(%d) memory regions not changed\n", dev->vid);
|
|
|
|
for (i = 0; i < memory.nregions; i++)
|
|
close(pmsg->fds[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (dev->mem) {
|
|
free_mem_region(dev);
|
|
rte_free(dev->mem);
|
|
dev->mem = NULL;
|
|
}
|
|
|
|
dev->nr_guest_pages = 0;
|
|
if (!dev->guest_pages) {
|
|
dev->max_guest_pages = 8;
|
|
dev->guest_pages = malloc(dev->max_guest_pages *
|
|
sizeof(struct guest_page));
|
|
if (dev->guest_pages == NULL) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"(%d) failed to allocate memory "
|
|
"for dev->guest_pages\n",
|
|
dev->vid);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
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) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"(%d) failed to allocate memory for dev->mem\n",
|
|
dev->vid);
|
|
return -1;
|
|
}
|
|
dev->mem->nregions = memory.nregions;
|
|
|
|
for (i = 0; i < memory.nregions; i++) {
|
|
fd = pmsg->fds[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 = fd;
|
|
|
|
mmap_offset = memory.regions[i].mmap_offset;
|
|
|
|
/* Check for memory_size + mmap_offset overflow */
|
|
if (mmap_offset >= -reg->size) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"mmap_offset (%#"PRIx64") and memory_size "
|
|
"(%#"PRIx64") overflow\n",
|
|
mmap_offset, reg->size);
|
|
goto err_mmap;
|
|
}
|
|
|
|
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(fd);
|
|
if (alignment == (uint64_t)-1) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"couldn't get hugepage size through fstat\n");
|
|
goto err_mmap;
|
|
}
|
|
mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
|
|
|
|
populate = (dev->dequeue_zero_copy) ? MAP_POPULATE : 0;
|
|
mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
|
|
MAP_SHARED | populate, fd, 0);
|
|
|
|
if (mmap_addr == MAP_FAILED) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"mmap region %u failed.\n", i);
|
|
goto err_mmap;
|
|
}
|
|
|
|
reg->mmap_addr = mmap_addr;
|
|
reg->mmap_size = mmap_size;
|
|
reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
|
|
mmap_offset;
|
|
|
|
if (dev->dequeue_zero_copy)
|
|
if (add_guest_pages(dev, reg, alignment) < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"adding guest pages to region %u failed.\n",
|
|
i);
|
|
goto err_mmap;
|
|
}
|
|
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"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);
|
|
}
|
|
|
|
dump_guest_pages(dev);
|
|
|
|
return 0;
|
|
|
|
err_mmap:
|
|
free_mem_region(dev);
|
|
rte_free(dev->mem);
|
|
dev->mem = NULL;
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
vq_is_ready(struct vhost_virtqueue *vq)
|
|
{
|
|
return vq && vq->desc && vq->avail && vq->used &&
|
|
vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
|
|
vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
|
|
}
|
|
|
|
static int
|
|
virtio_is_ready(struct virtio_net *dev)
|
|
{
|
|
struct vhost_virtqueue *vq;
|
|
uint32_t i;
|
|
|
|
if (dev->nr_vring == 0)
|
|
return 0;
|
|
|
|
for (i = 0; i < dev->nr_vring; i++) {
|
|
vq = dev->virtqueue[i];
|
|
|
|
if (!vq_is_ready(vq))
|
|
return 0;
|
|
}
|
|
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"virtio is now ready for processing.\n");
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
|
|
{
|
|
struct vhost_vring_file file;
|
|
struct vhost_virtqueue *vq;
|
|
|
|
file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
|
|
if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
|
|
file.fd = VIRTIO_INVALID_EVENTFD;
|
|
else
|
|
file.fd = pmsg->fds[0];
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"vring call idx:%d file:%d\n", file.index, file.fd);
|
|
|
|
vq = dev->virtqueue[file.index];
|
|
if (vq->callfd >= 0)
|
|
close(vq->callfd);
|
|
|
|
vq->callfd = file.fd;
|
|
}
|
|
|
|
static void
|
|
vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
|
|
{
|
|
struct vhost_vring_file file;
|
|
struct vhost_virtqueue *vq;
|
|
struct virtio_net *dev = *pdev;
|
|
|
|
file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
|
|
if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
|
|
file.fd = VIRTIO_INVALID_EVENTFD;
|
|
else
|
|
file.fd = pmsg->fds[0];
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"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)
|
|
return;
|
|
|
|
*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 (vq->kickfd >= 0)
|
|
close(vq->kickfd);
|
|
vq->kickfd = file.fd;
|
|
}
|
|
|
|
static void
|
|
free_zmbufs(struct vhost_virtqueue *vq)
|
|
{
|
|
struct zcopy_mbuf *zmbuf, *next;
|
|
|
|
for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
|
|
zmbuf != NULL; zmbuf = next) {
|
|
next = TAILQ_NEXT(zmbuf, next);
|
|
|
|
rte_pktmbuf_free(zmbuf->mbuf);
|
|
TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
|
|
}
|
|
|
|
rte_free(vq->zmbufs);
|
|
}
|
|
|
|
/*
|
|
* when virtio is stopped, qemu will send us the GET_VRING_BASE message.
|
|
*/
|
|
static int
|
|
vhost_user_get_vring_base(struct virtio_net *dev,
|
|
VhostUserMsg *msg)
|
|
{
|
|
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
|
|
struct rte_vdpa_device *vdpa_dev;
|
|
int did = -1;
|
|
|
|
/* We have to stop the queue (virtio) if it is running. */
|
|
if (dev->flags & VIRTIO_DEV_RUNNING) {
|
|
did = dev->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
if (vdpa_dev && vdpa_dev->ops->dev_close)
|
|
vdpa_dev->ops->dev_close(dev->vid);
|
|
dev->flags &= ~VIRTIO_DEV_RUNNING;
|
|
dev->notify_ops->destroy_device(dev->vid);
|
|
}
|
|
|
|
dev->flags &= ~VIRTIO_DEV_READY;
|
|
dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
|
|
|
|
/* Here we are safe to get the last avail index */
|
|
msg->payload.state.num = vq->last_avail_idx;
|
|
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"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;
|
|
|
|
if (dev->dequeue_zero_copy)
|
|
free_zmbufs(vq);
|
|
rte_free(vq->shadow_used_ring);
|
|
vq->shadow_used_ring = NULL;
|
|
|
|
rte_free(vq->batch_copy_elems);
|
|
vq->batch_copy_elems = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 *dev,
|
|
VhostUserMsg *msg)
|
|
{
|
|
int enable = (int)msg->payload.state.num;
|
|
int index = (int)msg->payload.state.index;
|
|
struct rte_vdpa_device *vdpa_dev;
|
|
int did = -1;
|
|
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"set queue enable: %d to qp idx: %d\n",
|
|
enable, index);
|
|
|
|
did = dev->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
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);
|
|
|
|
dev->virtqueue[index]->enabled = enable;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
vhost_user_get_protocol_features(struct virtio_net *dev,
|
|
struct VhostUserMsg *msg)
|
|
{
|
|
uint64_t features, protocol_features;
|
|
|
|
rte_vhost_driver_get_features(dev->ifname, &features);
|
|
rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features);
|
|
|
|
/*
|
|
* REPLY_ACK protocol feature is only mandatory for now
|
|
* for IOMMU feature. If IOMMU is explicitly disabled by the
|
|
* application, disable also REPLY_ACK feature for older buggy
|
|
* Qemu versions (from v2.7.0 to v2.9.0).
|
|
*/
|
|
if (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))
|
|
protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK);
|
|
|
|
msg->payload.u64 = protocol_features;
|
|
msg->size = sizeof(msg->payload.u64);
|
|
}
|
|
|
|
static void
|
|
vhost_user_set_protocol_features(struct virtio_net *dev,
|
|
uint64_t protocol_features)
|
|
{
|
|
if (protocol_features & ~VHOST_USER_PROTOCOL_FEATURES)
|
|
return;
|
|
|
|
dev->protocol_features = protocol_features;
|
|
}
|
|
|
|
static int
|
|
vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
|
|
{
|
|
int fd = msg->fds[0];
|
|
uint64_t size, off;
|
|
void *addr;
|
|
|
|
if (fd < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG, "invalid log fd: %d\n", fd);
|
|
return -1;
|
|
}
|
|
|
|
if (msg->size != sizeof(VhostUserLog)) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"invalid log base msg size: %"PRId32" != %d\n",
|
|
msg->size, (int)sizeof(VhostUserLog));
|
|
return -1;
|
|
}
|
|
|
|
size = msg->payload.log.mmap_size;
|
|
off = msg->payload.log.mmap_offset;
|
|
|
|
/* Don't allow mmap_offset to point outside the mmap region */
|
|
if (off > size) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"log offset %#"PRIx64" exceeds log size %#"PRIx64"\n",
|
|
off, size);
|
|
return -1;
|
|
}
|
|
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"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) {
|
|
RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 *dev, struct VhostUserMsg *msg)
|
|
{
|
|
uint8_t *mac = (uint8_t *)&msg->payload.u64;
|
|
struct rte_vdpa_device *vdpa_dev;
|
|
int did = -1;
|
|
|
|
RTE_LOG(DEBUG, VHOST_CONFIG,
|
|
":: 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().
|
|
*
|
|
* rte_smp_wmb() is for making sure the mac is copied
|
|
* before the flag is set.
|
|
*/
|
|
rte_smp_wmb();
|
|
rte_atomic16_set(&dev->broadcast_rarp, 1);
|
|
did = dev->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
if (vdpa_dev && vdpa_dev->ops->migration_done)
|
|
vdpa_dev->ops->migration_done(dev->vid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
|
|
{
|
|
if (msg->payload.u64 < VIRTIO_MIN_MTU ||
|
|
msg->payload.u64 > VIRTIO_MAX_MTU) {
|
|
RTE_LOG(ERR, VHOST_CONFIG, "Invalid MTU size (%"PRIu64")\n",
|
|
msg->payload.u64);
|
|
|
|
return -1;
|
|
}
|
|
|
|
dev->mtu = msg->payload.u64;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
vhost_user_set_req_fd(struct virtio_net *dev, struct VhostUserMsg *msg)
|
|
{
|
|
int fd = msg->fds[0];
|
|
|
|
if (fd < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"Invalid file descriptor for slave channel (%d)\n",
|
|
fd);
|
|
return -1;
|
|
}
|
|
|
|
dev->slave_req_fd = fd;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
|
|
{
|
|
struct vhost_vring_addr *ra;
|
|
uint64_t start, end;
|
|
|
|
start = imsg->iova;
|
|
end = start + imsg->size;
|
|
|
|
ra = &vq->ring_addrs;
|
|
if (ra->desc_user_addr >= start && ra->desc_user_addr < end)
|
|
return 1;
|
|
if (ra->avail_user_addr >= start && ra->avail_user_addr < end)
|
|
return 1;
|
|
if (ra->used_user_addr >= start && ra->used_user_addr < end)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
|
|
struct vhost_iotlb_msg *imsg)
|
|
{
|
|
uint64_t istart, iend, vstart, vend;
|
|
|
|
istart = imsg->iova;
|
|
iend = istart + imsg->size - 1;
|
|
|
|
vstart = (uintptr_t)vq->desc;
|
|
vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
|
|
if (vstart <= iend && istart <= vend)
|
|
return 1;
|
|
|
|
vstart = (uintptr_t)vq->avail;
|
|
vend = vstart + sizeof(struct vring_avail);
|
|
vend += sizeof(uint16_t) * vq->size - 1;
|
|
if (vstart <= iend && istart <= vend)
|
|
return 1;
|
|
|
|
vstart = (uintptr_t)vq->used;
|
|
vend = vstart + sizeof(struct vring_used);
|
|
vend += sizeof(struct vring_used_elem) * vq->size - 1;
|
|
if (vstart <= iend && istart <= vend)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg)
|
|
{
|
|
struct virtio_net *dev = *pdev;
|
|
struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
|
|
uint16_t i;
|
|
uint64_t vva;
|
|
|
|
switch (imsg->type) {
|
|
case VHOST_IOTLB_UPDATE:
|
|
vva = qva_to_vva(dev, imsg->uaddr);
|
|
if (!vva)
|
|
return -1;
|
|
|
|
for (i = 0; i < dev->nr_vring; i++) {
|
|
struct vhost_virtqueue *vq = dev->virtqueue[i];
|
|
|
|
vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
|
|
imsg->size, imsg->perm);
|
|
|
|
if (is_vring_iotlb_update(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];
|
|
|
|
vhost_user_iotlb_cache_remove(vq, imsg->iova,
|
|
imsg->size);
|
|
|
|
if (is_vring_iotlb_invalidate(vq, imsg))
|
|
vring_invalidate(dev, vq);
|
|
}
|
|
break;
|
|
default:
|
|
RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
|
|
imsg->type);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 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);
|
|
if (ret <= 0)
|
|
return ret;
|
|
|
|
if (msg && msg->size) {
|
|
if (msg->size > sizeof(msg->payload)) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"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) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"read control message failed\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
send_vhost_message(int sockfd, struct VhostUserMsg *msg, int *fds, int fd_num)
|
|
{
|
|
if (!msg)
|
|
return 0;
|
|
|
|
return send_fd_message(sockfd, (char *)msg,
|
|
VHOST_USER_HDR_SIZE + msg->size, fds, 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, NULL, 0);
|
|
}
|
|
|
|
/*
|
|
* Allocate a queue pair if it hasn't been allocated yet
|
|
*/
|
|
static int
|
|
vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, VhostUserMsg *msg)
|
|
{
|
|
uint16_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) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"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 did = -1;
|
|
int ret;
|
|
int unlock_required = 0;
|
|
uint32_t skip_master = 0;
|
|
|
|
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) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to get callback ops for driver %s\n",
|
|
dev->ifname);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
ret = read_vhost_message(fd, &msg);
|
|
if (ret <= 0 || msg.request.master >= VHOST_USER_MAX) {
|
|
if (ret < 0)
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"vhost read message failed\n");
|
|
else if (ret == 0)
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"vhost peer closed\n");
|
|
else
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"vhost read incorrect message\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
ret = 0;
|
|
if (msg.request.master != VHOST_USER_IOTLB_MSG)
|
|
RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
|
|
vhost_message_str[msg.request.master]);
|
|
else
|
|
RTE_LOG(DEBUG, VHOST_CONFIG, "read message %s\n",
|
|
vhost_message_str[msg.request.master]);
|
|
|
|
ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
|
|
if (ret < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"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 (msg.request.master) {
|
|
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:
|
|
vhost_user_lock_all_queue_pairs(dev);
|
|
unlock_required = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
|
|
}
|
|
|
|
if (dev->extern_ops.pre_msg_handle) {
|
|
uint32_t need_reply;
|
|
|
|
ret = (*dev->extern_ops.pre_msg_handle)(dev->vid,
|
|
(void *)&msg, &need_reply, &skip_master);
|
|
if (ret < 0)
|
|
goto skip_to_reply;
|
|
|
|
if (need_reply)
|
|
send_vhost_reply(fd, &msg);
|
|
|
|
if (skip_master)
|
|
goto skip_to_post_handle;
|
|
}
|
|
|
|
switch (msg.request.master) {
|
|
case VHOST_USER_GET_FEATURES:
|
|
msg.payload.u64 = vhost_user_get_features(dev);
|
|
msg.size = sizeof(msg.payload.u64);
|
|
send_vhost_reply(fd, &msg);
|
|
break;
|
|
case VHOST_USER_SET_FEATURES:
|
|
ret = vhost_user_set_features(dev, msg.payload.u64);
|
|
if (ret)
|
|
return -1;
|
|
break;
|
|
|
|
case VHOST_USER_GET_PROTOCOL_FEATURES:
|
|
vhost_user_get_protocol_features(dev, &msg);
|
|
send_vhost_reply(fd, &msg);
|
|
break;
|
|
case VHOST_USER_SET_PROTOCOL_FEATURES:
|
|
vhost_user_set_protocol_features(dev, msg.payload.u64);
|
|
break;
|
|
|
|
case VHOST_USER_SET_OWNER:
|
|
vhost_user_set_owner();
|
|
break;
|
|
case VHOST_USER_RESET_OWNER:
|
|
vhost_user_reset_owner(dev);
|
|
break;
|
|
|
|
case VHOST_USER_SET_MEM_TABLE:
|
|
ret = vhost_user_set_mem_table(dev, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_SET_LOG_BASE:
|
|
vhost_user_set_log_base(dev, &msg);
|
|
|
|
/* it needs a reply */
|
|
msg.size = sizeof(msg.payload.u64);
|
|
send_vhost_reply(fd, &msg);
|
|
break;
|
|
case VHOST_USER_SET_LOG_FD:
|
|
close(msg.fds[0]);
|
|
RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
|
|
break;
|
|
|
|
case VHOST_USER_SET_VRING_NUM:
|
|
vhost_user_set_vring_num(dev, &msg);
|
|
break;
|
|
case VHOST_USER_SET_VRING_ADDR:
|
|
vhost_user_set_vring_addr(&dev, &msg);
|
|
break;
|
|
case VHOST_USER_SET_VRING_BASE:
|
|
vhost_user_set_vring_base(dev, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_GET_VRING_BASE:
|
|
vhost_user_get_vring_base(dev, &msg);
|
|
msg.size = sizeof(msg.payload.state);
|
|
send_vhost_reply(fd, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_SET_VRING_KICK:
|
|
vhost_user_set_vring_kick(&dev, &msg);
|
|
break;
|
|
case VHOST_USER_SET_VRING_CALL:
|
|
vhost_user_set_vring_call(dev, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_SET_VRING_ERR:
|
|
if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
|
|
close(msg.fds[0]);
|
|
RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
|
|
break;
|
|
|
|
case VHOST_USER_GET_QUEUE_NUM:
|
|
msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
|
|
msg.size = sizeof(msg.payload.u64);
|
|
send_vhost_reply(fd, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_SET_VRING_ENABLE:
|
|
vhost_user_set_vring_enable(dev, &msg);
|
|
break;
|
|
case VHOST_USER_SEND_RARP:
|
|
vhost_user_send_rarp(dev, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_NET_SET_MTU:
|
|
ret = vhost_user_net_set_mtu(dev, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_SET_SLAVE_REQ_FD:
|
|
ret = vhost_user_set_req_fd(dev, &msg);
|
|
break;
|
|
|
|
case VHOST_USER_IOTLB_MSG:
|
|
ret = vhost_user_iotlb_msg(&dev, &msg);
|
|
break;
|
|
|
|
default:
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
skip_to_post_handle:
|
|
if (dev->extern_ops.post_msg_handle) {
|
|
uint32_t need_reply;
|
|
|
|
ret = (*dev->extern_ops.post_msg_handle)(
|
|
dev->vid, (void *)&msg, &need_reply);
|
|
if (ret < 0)
|
|
goto skip_to_reply;
|
|
|
|
if (need_reply)
|
|
send_vhost_reply(fd, &msg);
|
|
}
|
|
|
|
skip_to_reply:
|
|
if (unlock_required)
|
|
vhost_user_unlock_all_queue_pairs(dev);
|
|
|
|
if (msg.flags & VHOST_USER_NEED_REPLY) {
|
|
msg.payload.u64 = !!ret;
|
|
msg.size = sizeof(msg.payload.u64);
|
|
send_vhost_reply(fd, &msg);
|
|
}
|
|
|
|
if (!(dev->flags & VIRTIO_DEV_RUNNING) && virtio_is_ready(dev)) {
|
|
dev->flags |= VIRTIO_DEV_READY;
|
|
|
|
if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
|
|
if (dev->dequeue_zero_copy) {
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"dequeue zero copy is enabled\n");
|
|
}
|
|
|
|
if (dev->notify_ops->new_device(dev->vid) == 0)
|
|
dev->flags |= VIRTIO_DEV_RUNNING;
|
|
}
|
|
}
|
|
|
|
did = dev->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
if (vdpa_dev && virtio_is_ready(dev) &&
|
|
!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) &&
|
|
msg.request.master == VHOST_USER_SET_VRING_ENABLE) {
|
|
if (vdpa_dev->ops->dev_conf)
|
|
vdpa_dev->ops->dev_conf(dev->vid);
|
|
dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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, NULL, 0);
|
|
if (ret < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"Failed to send IOTLB miss message (%d)\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|