diff options
Diffstat (limited to 'src/spdk/dpdk/lib/librte_vhost/vhost_user.c')
| -rw-r--r-- | src/spdk/dpdk/lib/librte_vhost/vhost_user.c | 3023 |
1 files changed, 3023 insertions, 0 deletions
diff --git a/src/spdk/dpdk/lib/librte_vhost/vhost_user.c b/src/spdk/dpdk/lib/librte_vhost/vhost_user.c new file mode 100644 index 000000000..84bebad79 --- /dev/null +++ b/src/spdk/dpdk/lib/librte_vhost/vhost_user.c @@ -0,0 +1,3023 @@ +/* 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", +}; + +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++) + close(msg->fds[i]); +} + +/* + * 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; +} + +/* + * Reclaim all the outstanding zmbufs for a virtqueue. + */ +static void +drain_zmbuf_list(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); + + while (!mbuf_is_consumed(zmbuf->mbuf)) + usleep(1000); + + TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next); + restore_mbuf(zmbuf->mbuf); + rte_pktmbuf_free(zmbuf->mbuf); + put_zmbuf(zmbuf); + vq->nr_zmbuf -= 1; + } +} + +static void +free_mem_region(struct virtio_net *dev) +{ + uint32_t i; + struct rte_vhost_mem_region *reg; + struct vhost_virtqueue *vq; + + if (!dev || !dev->mem) + return; + + if (dev->dequeue_zero_copy) { + for (i = 0; i < dev->nr_vring; i++) { + vq = dev->virtqueue[i]; + if (vq) + drain_zmbuf_list(vq); + } + } + + 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; +} + +/* + * 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; + int did = -1; + + 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); + 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 & + ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) { + 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); + } + } + + did = dev->vdpa_dev_id; + vdpa_dev = rte_vdpa_get_device(did); + if (vdpa_dev && vdpa_dev->ops->set_features) + vdpa_dev->ops->set_features(dev->vid); + + 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 (dev->dequeue_zero_copy) { + vq->nr_zmbuf = 0; + vq->last_zmbuf_idx = 0; + vq->zmbuf_size = vq->size; + if (vq->zmbufs) + rte_free(vq->zmbufs); + vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size * + sizeof(struct zcopy_mbuf), 0); + if (vq->zmbufs == NULL) { + VHOST_LOG_CONFIG(WARNING, + "failed to allocate mem for zero copy; " + "zero copy is force disabled\n"); + dev->dequeue_zero_copy = 0; + } + TAILQ_INIT(&vq->zmbuf_list); + } + + 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 shadow used ring.\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 zcopy_mbuf *new_zmbuf; + 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)); + TAILQ_INIT(&vq->zmbuf_list); + + if (dev->dequeue_zero_copy) { + new_zmbuf = rte_malloc_socket(NULL, vq->zmbuf_size * + sizeof(struct zcopy_mbuf), 0, newnode); + if (new_zmbuf) { + rte_free(vq->zmbufs); + vq->zmbufs = new_zmbuf; + } + } + + 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; + int fd; + + 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); + return RTE_VHOST_MSG_RESULT_ERR; + } + + 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) { + 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); + return RTE_VHOST_MSG_RESULT_ERR; + } + } + + 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); + return RTE_VHOST_MSG_RESULT_ERR; + } + dev->mem->nregions = memory->nregions; + + for (i = 0; i < memory->nregions; i++) { + fd = msg->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) { + VHOST_LOG_CONFIG(ERR, + "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) { + VHOST_LOG_CONFIG(ERR, + "couldn't get hugepage size through fstat\n"); + goto err_mmap; + } + 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 err_mmap; + } + + 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) { + VHOST_LOG_CONFIG(ERR, + "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) { + VHOST_LOG_CONFIG(ERR, + "adding guest pages to region %u failed.\n", + i); + goto err_mmap; + } + + 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 err_mmap; + } + + if (validate_msg_fds(&ack_msg, 0) != 0) + goto err_mmap; + + 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 err_mmap; + } + + /* 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 err_mmap; + } + 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 err_mmap; +#endif + } + } + + for (i = 0; i < dev->nr_vring; i++) { + struct vhost_virtqueue *vq = dev->virtqueue[i]; + + 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 err_mmap; + } + + *pdev = dev; + } + } + + dump_guest_pages(dev); + + return RTE_VHOST_MSG_RESULT_OK; + +err_mmap: + free_mem_region(dev); + rte_free(dev->mem); + dev->mem = NULL; + 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; +} + +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(dev, vq)) + return 0; + } + + 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_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->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) + 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->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; +} + +static void +free_zmbufs(struct vhost_virtqueue *vq) +{ + drain_zmbuf_list(vq); + + 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 **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 (dev->dequeue_zero_copy) + free_zmbufs(vq); + 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; + } + + 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; + struct rte_vdpa_device *vdpa_dev; + int did = -1; + + 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); + + 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); + + /* On disable, rings have to be stopped being processed. */ + if (!enable && dev->dequeue_zero_copy) + drain_zmbuf_list(dev->virtqueue[index]); + + 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); + + /* + * 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); + 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)); + return RTE_VHOST_MSG_RESULT_ERR; + } + + 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); + return RTE_VHOST_MSG_RESULT_ERR; + } + + 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; +} + +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; + int did = -1; + + 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); + 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 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]; + + 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]; + + 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; +} + +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, +}; + +/* 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 did = -1; + int ret; + int unlock_required = 0; + bool handled; + int request; + + 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: + 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; + } + + 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) { + VHOST_LOG_CONFIG(INFO, + "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_CALL) { + if (vdpa_dev->ops->dev_conf) + vdpa_dev->ops->dev_conf(dev->vid); + dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED; + } + + 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, bool enable) +{ + struct virtio_net *dev; + struct rte_vdpa_device *vdpa_dev; + int vfio_device_fd, did, ret = 0; + uint64_t offset, size; + unsigned int i; + + dev = get_device(vid); + if (!dev) + return -ENODEV; + + did = dev->vdpa_dev_id; + if (did < 0) + return -EINVAL; + + 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; + + vdpa_dev = rte_vdpa_get_device(did); + if (!vdpa_dev) + return -ENODEV; + + 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 = 0; i < dev->nr_vring; 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 = 0; i < dev->nr_vring; i++) { + vhost_user_slave_set_vring_host_notifier(dev, i, -1, + 0, 0); + } + } + + return ret; +} |