/* 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 #include #include #include #include #include #include #include #include #include #ifdef RTE_LIBRTE_VHOST_NUMA #include #endif #ifdef RTE_LIBRTE_VHOST_POSTCOPY #include #endif #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */ #include #define MEMFD_SUPPORTED #endif #include #include #include #include #include #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 typedef struct vhost_message_handler { const char *description; int (*callback)(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd); bool accepts_fd; } vhost_message_handler_t; static vhost_message_handler_t vhost_message_handlers[]; static int send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx); static int read_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx); static void close_msg_fds(struct vhu_msg_context *ctx) { int i; for (i = 0; i < ctx->fd_num; i++) { int fd = ctx->fds[i]; if (fd == -1) continue; ctx->fds[i] = -1; close(fd); } } /* * Ensure the expected number of FDs is received, * close all FDs and return an error if this is not the case. */ static int validate_msg_fds(struct virtio_net *dev, struct vhu_msg_context *ctx, int expected_fds) { if (ctx->fd_num == expected_fds) return 0; VHOST_LOG_CONFIG(dev->ifname, ERR, "expect %d FDs for request %s, received %d\n", expected_fds, vhost_message_handlers[ctx->msg.request.master].description, ctx->fd_num); close_msg_fds(ctx); return -1; } static uint64_t get_blk_size(int fd) { struct stat stat; int ret; ret = fstat(fd, &stat); return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize; } static void async_dma_map(struct virtio_net *dev, bool do_map) { int ret = 0; uint32_t i; struct guest_page *page; if (do_map) { for (i = 0; i < dev->nr_guest_pages; i++) { page = &dev->guest_pages[i]; ret = rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD, page->host_user_addr, page->host_iova, page->size); if (ret) { /* * DMA device may bind with kernel driver, in this case, * we don't need to program IOMMU manually. However, if no * device is bound with vfio/uio in DPDK, and vfio kernel * module is loaded, the API will still be called and return * with ENODEV. * * DPDK vfio only returns ENODEV in very similar situations * (vfio either unsupported, or supported but no devices found). * Either way, no mappings could be performed. We treat it as * normal case in async path. This is a workaround. */ if (rte_errno == ENODEV) return; /* DMA mapping errors won't stop VHOST_USER_SET_MEM_TABLE. */ VHOST_LOG_CONFIG(dev->ifname, ERR, "DMA engine map failed\n"); } } } else { for (i = 0; i < dev->nr_guest_pages; i++) { page = &dev->guest_pages[i]; ret = rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD, page->host_user_addr, page->host_iova, page->size); if (ret) { /* like DMA map, ignore the kernel driver case when unmap. */ if (rte_errno == EINVAL) return; VHOST_LOG_CONFIG(dev->ifname, ERR, "DMA engine unmap failed\n"); } } } } static void free_mem_region(struct virtio_net *dev) { uint32_t i; struct rte_vhost_mem_region *reg; if (!dev || !dev->mem) return; if (dev->async_copy && rte_vfio_is_enabled("vfio")) async_dma_map(dev, false); 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) { struct rte_vdpa_device *vdpa_dev; vdpa_dev = dev->vdpa_dev; if (vdpa_dev && vdpa_dev->ops->dev_cleanup != NULL) vdpa_dev->ops->dev_cleanup(dev->vid); 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; } rte_free(dev->inflight_info); dev->inflight_info = NULL; } if (dev->slave_req_fd >= 0) { close(dev->slave_req_fd); dev->slave_req_fd = -1; } if (dev->postcopy_ufd >= 0) { close(dev->postcopy_ufd); dev->postcopy_ufd = -1; } dev->postcopy_listening = 0; } static void vhost_user_notify_queue_state(struct virtio_net *dev, struct vhost_virtqueue *vq, int enable) { struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; /* Configure guest notifications on enable */ if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF) vhost_enable_guest_notification(dev, vq, vq->notif_enable); if (vdpa_dev && vdpa_dev->ops->set_vring_state) vdpa_dev->ops->set_vring_state(dev->vid, vq->index, enable); if (dev->notify_ops->vring_state_changed) dev->notify_ops->vring_state_changed(dev->vid, vq->index, enable); } /* * This function just returns success at the moment unless * the device hasn't been initialised. */ static int vhost_user_set_owner(struct virtio_net **pdev __rte_unused, struct vhu_msg_context *ctx __rte_unused, int main_fd __rte_unused) { return RTE_VHOST_MSG_RESULT_OK; } static int vhost_user_reset_owner(struct virtio_net **pdev, struct vhu_msg_context *ctx __rte_unused, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; uint64_t features = 0; rte_vhost_driver_get_features(dev->ifname, &features); ctx->msg.payload.u64 = features; ctx->msg.size = sizeof(ctx->msg.payload.u64); ctx->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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; uint32_t queue_num = 0; rte_vhost_driver_get_queue_num(dev->ifname, &queue_num); ctx->msg.payload.u64 = (uint64_t)queue_num; ctx->msg.size = sizeof(ctx->msg.payload.u64); ctx->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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; uint64_t features = ctx->msg.payload.u64; uint64_t vhost_features = 0; struct rte_vdpa_device *vdpa_dev; rte_vhost_driver_get_features(dev->ifname, &vhost_features); if (features & ~vhost_features) { VHOST_LOG_CONFIG(dev->ifname, ERR, "received invalid negotiated features.\n"); dev->flags |= VIRTIO_DEV_FEATURES_FAILED; dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; return RTE_VHOST_MSG_RESULT_ERR; } if (dev->flags & VIRTIO_DEV_RUNNING) { if (dev->features == features) return RTE_VHOST_MSG_RESULT_OK; /* * Error out if master tries to change features while device is * in running state. The exception being VHOST_F_LOG_ALL, which * is enabled when the live-migration starts. */ if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) { VHOST_LOG_CONFIG(dev->ifname, ERR, "features changed while device is running.\n"); return RTE_VHOST_MSG_RESULT_ERR; } if (dev->notify_ops->features_changed) dev->notify_ops->features_changed(dev->vid, features); } dev->features = features; if (dev->features & ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1) | (1ULL << VIRTIO_F_RING_PACKED))) { dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf); } else { dev->vhost_hlen = sizeof(struct virtio_net_hdr); } VHOST_LOG_CONFIG(dev->ifname, INFO, "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features); VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mergeable RX buffers %s, virtio 1 %s\n", (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off", (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off"); if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) && !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) { /* * Remove all but first queue pair if MQ hasn't been * negotiated. This is safe because the device is not * running at this stage. */ while (dev->nr_vring > 2) { struct vhost_virtqueue *vq; vq = dev->virtqueue[--dev->nr_vring]; if (!vq) continue; dev->virtqueue[dev->nr_vring] = NULL; cleanup_vq(vq, 1); cleanup_vq_inflight(dev, vq); free_vq(dev, vq); } } vdpa_dev = dev->vdpa_dev; if (vdpa_dev) vdpa_dev->ops->set_features(dev->vid); dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED; return RTE_VHOST_MSG_RESULT_OK; } /* * The virtio device sends us the size of the descriptor ring. */ static int vhost_user_set_vring_num(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; if (ctx->msg.payload.state.num > 32768) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid virtqueue size %u\n", ctx->msg.payload.state.num); return RTE_VHOST_MSG_RESULT_ERR; } vq->size = ctx->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(dev->ifname, ERR, "invalid virtqueue size %u\n", vq->size); return RTE_VHOST_MSG_RESULT_ERR; } } if (vq_is_packed(dev)) { rte_free(vq->shadow_used_packed); vq->shadow_used_packed = rte_malloc_socket(NULL, vq->size * sizeof(struct vring_used_elem_packed), RTE_CACHE_LINE_SIZE, vq->numa_node); if (!vq->shadow_used_packed) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for shadow used ring.\n"); return RTE_VHOST_MSG_RESULT_ERR; } } else { rte_free(vq->shadow_used_split); vq->shadow_used_split = rte_malloc_socket(NULL, vq->size * sizeof(struct vring_used_elem), RTE_CACHE_LINE_SIZE, vq->numa_node); if (!vq->shadow_used_split) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for vq internal data.\n"); return RTE_VHOST_MSG_RESULT_ERR; } } rte_free(vq->batch_copy_elems); vq->batch_copy_elems = rte_malloc_socket(NULL, vq->size * sizeof(struct batch_copy_elem), RTE_CACHE_LINE_SIZE, vq->numa_node); if (!vq->batch_copy_elems) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for batching copy.\n"); return RTE_VHOST_MSG_RESULT_ERR; } return RTE_VHOST_MSG_RESULT_OK; } /* * Reallocate virtio_dev, vhost_virtqueue and related data structures to * make them on the same numa node as the memory of vring descriptor. */ #ifdef RTE_LIBRTE_VHOST_NUMA static void numa_realloc(struct virtio_net **pdev, struct vhost_virtqueue **pvq) { int node, dev_node; struct virtio_net *dev; struct vhost_virtqueue *vq; struct batch_copy_elem *bce; struct guest_page *gp; struct rte_vhost_memory *mem; size_t mem_size; int ret; dev = *pdev; vq = *pvq; /* * If VQ is ready, it is too late to reallocate, it certainly already * happened anyway on VHOST_USER_SET_VRING_ADRR. */ if (vq->ready) return; ret = get_mempolicy(&node, NULL, 0, vq->desc, MPOL_F_NODE | MPOL_F_ADDR); if (ret) { VHOST_LOG_CONFIG(dev->ifname, ERR, "unable to get virtqueue %d numa information.\n", vq->index); return; } if (node == vq->numa_node) goto out_dev_realloc; vq = rte_realloc_socket(*pvq, sizeof(**pvq), 0, node); if (!vq) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc virtqueue %d on node %d\n", (*pvq)->index, node); return; } *pvq = vq; if (vq != dev->virtqueue[vq->index]) { VHOST_LOG_CONFIG(dev->ifname, INFO, "reallocated virtqueue on node %d\n", node); dev->virtqueue[vq->index] = vq; vhost_user_iotlb_init(dev, vq); } if (vq_is_packed(dev)) { struct vring_used_elem_packed *sup; sup = rte_realloc_socket(vq->shadow_used_packed, vq->size * sizeof(*sup), RTE_CACHE_LINE_SIZE, node); if (!sup) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc shadow packed on node %d\n", node); return; } vq->shadow_used_packed = sup; } else { struct vring_used_elem *sus; sus = rte_realloc_socket(vq->shadow_used_split, vq->size * sizeof(*sus), RTE_CACHE_LINE_SIZE, node); if (!sus) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc shadow split on node %d\n", node); return; } vq->shadow_used_split = sus; } bce = rte_realloc_socket(vq->batch_copy_elems, vq->size * sizeof(*bce), RTE_CACHE_LINE_SIZE, node); if (!bce) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc batch copy elem on node %d\n", node); return; } vq->batch_copy_elems = bce; if (vq->log_cache) { struct log_cache_entry *lc; lc = rte_realloc_socket(vq->log_cache, sizeof(*lc) * VHOST_LOG_CACHE_NR, 0, node); if (!lc) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc log cache on node %d\n", node); return; } vq->log_cache = lc; } if (vq->resubmit_inflight) { struct rte_vhost_resubmit_info *ri; ri = rte_realloc_socket(vq->resubmit_inflight, sizeof(*ri), 0, node); if (!ri) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc resubmit inflight on node %d\n", node); return; } vq->resubmit_inflight = ri; if (ri->resubmit_list) { struct rte_vhost_resubmit_desc *rd; rd = rte_realloc_socket(ri->resubmit_list, sizeof(*rd) * ri->resubmit_num, 0, node); if (!rd) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc resubmit list on node %d\n", node); return; } ri->resubmit_list = rd; } } vq->numa_node = node; out_dev_realloc: if (dev->flags & VIRTIO_DEV_RUNNING) return; ret = get_mempolicy(&dev_node, NULL, 0, dev, MPOL_F_NODE | MPOL_F_ADDR); if (ret) { VHOST_LOG_CONFIG(dev->ifname, ERR, "unable to get numa information.\n"); return; } if (dev_node == node) return; dev = rte_realloc_socket(*pdev, sizeof(**pdev), 0, node); if (!dev) { VHOST_LOG_CONFIG((*pdev)->ifname, ERR, "failed to realloc dev on node %d\n", node); return; } *pdev = dev; VHOST_LOG_CONFIG(dev->ifname, INFO, "reallocated device on node %d\n", node); vhost_devices[dev->vid] = dev; mem_size = sizeof(struct rte_vhost_memory) + sizeof(struct rte_vhost_mem_region) * dev->mem->nregions; mem = rte_realloc_socket(dev->mem, mem_size, 0, node); if (!mem) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc mem table on node %d\n", node); return; } dev->mem = mem; gp = rte_realloc_socket(dev->guest_pages, dev->max_guest_pages * sizeof(*gp), RTE_CACHE_LINE_SIZE, node); if (!gp) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to realloc guest pages on node %d\n", node); return; } dev->guest_pages = gp; } #else static void numa_realloc(struct virtio_net **pdev, struct vhost_virtqueue **pvq) { RTE_SET_USED(pdev); RTE_SET_USED(pvq); } #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 void translate_ring_addresses(struct virtio_net **pdev, struct vhost_virtqueue **pvq) { struct vhost_virtqueue *vq; struct virtio_net *dev; uint64_t len, expected_len; dev = *pdev; vq = *pvq; if (vq->ring_addrs.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(dev->ifname, DEBUG, "failed to map log_guest_addr.\n"); return; } } 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, vq->ring_addrs.desc_user_addr, &len); if (vq->desc_packed == NULL || len != sizeof(struct vring_packed_desc) * vq->size) { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map desc_packed ring.\n"); return; } numa_realloc(&dev, &vq); *pdev = dev; *pvq = vq; len = sizeof(struct vring_packed_desc_event); vq->driver_event = (struct vring_packed_desc_event *) (uintptr_t)ring_addr_to_vva(dev, vq, vq->ring_addrs.avail_user_addr, &len); if (vq->driver_event == NULL || len != sizeof(struct vring_packed_desc_event)) { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to find driver area address.\n"); return; } len = sizeof(struct vring_packed_desc_event); vq->device_event = (struct vring_packed_desc_event *) (uintptr_t)ring_addr_to_vva(dev, vq, vq->ring_addrs.used_user_addr, &len); if (vq->device_event == NULL || len != sizeof(struct vring_packed_desc_event)) { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to find device area address.\n"); return; } vq->access_ok = true; return; } /* The addresses are converted from QEMU virtual to Vhost virtual. */ if (vq->desc && vq->avail && vq->used) return; len = sizeof(struct vring_desc) * vq->size; vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev, vq, vq->ring_addrs.desc_user_addr, &len); if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map desc ring.\n"); return; } numa_realloc(&dev, &vq); *pdev = dev; *pvq = vq; 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, vq->ring_addrs.avail_user_addr, &len); if (vq->avail == 0 || len != expected_len) { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map avail ring.\n"); return; } 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, vq->ring_addrs.used_user_addr, &len); if (vq->used == 0 || len != expected_len) { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map used ring.\n"); return; } if (vq->last_used_idx != vq->used->idx) { VHOST_LOG_CONFIG(dev->ifname, WARNING, "last_used_idx (%u) and vq->used->idx (%u) mismatches;\n", vq->last_used_idx, vq->used->idx); vq->last_used_idx = vq->used->idx; vq->last_avail_idx = vq->used->idx; VHOST_LOG_CONFIG(dev->ifname, WARNING, "some packets maybe resent for Tx and dropped for Rx\n"); } vq->access_ok = true; VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mapped address desc: %p\n", vq->desc); VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mapped address avail: %p\n", vq->avail); VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mapped address used: %p\n", vq->used); VHOST_LOG_CONFIG(dev->ifname, DEBUG, "log_guest_addr: %" PRIx64 "\n", vq->log_guest_addr); } /* * 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_virtqueue *vq; struct vhost_vring_addr *addr = &ctx->msg.payload.addr; bool access_ok; 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[ctx->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) { translate_ring_addresses(&dev, &vq); *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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; uint64_t val = ctx->msg.payload.state.num; 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 = ctx->msg.payload.state.num; vq->last_avail_idx = ctx->msg.payload.state.num; } VHOST_LOG_CONFIG(dev->ifname, INFO, "vring base idx:%u last_used_idx:%u last_avail_idx:%u.\n", ctx->msg.payload.state.index, vq->last_used_idx, vq->last_avail_idx); return RTE_VHOST_MSG_RESULT_OK; } static int add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr, uint64_t host_iova, uint64_t host_user_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(dev->ifname, 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_iova == last_page->host_iova + last_page->size && guest_phys_addr == last_page->guest_phys_addr + last_page->size && host_user_addr == last_page->host_user_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_iova = host_iova; page->host_user_addr = host_user_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_iova; uint64_t size; host_iova = 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_iova, host_user_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_iova = rte_mem_virt2iova((void *)(uintptr_t) host_user_addr); if (add_one_guest_page(dev, guest_phys_addr, host_iova, host_user_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(dev->ifname, INFO, "guest physical page region %u\n", i); VHOST_LOG_CONFIG(dev->ifname, INFO, "\tguest_phys_addr: %" PRIx64 "\n", page->guest_phys_addr); VHOST_LOG_CONFIG(dev->ifname, INFO, "\thost_iova : %" PRIx64 "\n", page->host_iova); VHOST_LOG_CONFIG(dev->ifname, INFO, "\tsize : %" PRIx64 "\n", 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; } #ifdef RTE_LIBRTE_VHOST_POSTCOPY static int vhost_user_postcopy_region_register(struct virtio_net *dev, struct rte_vhost_mem_region *reg) { struct uffdio_register reg_struct; /* * Let's register all the mmapped 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(dev->ifname, ERR, "failed to register ufd for region " "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n", (uint64_t)reg_struct.range.start, (uint64_t)reg_struct.range.start + (uint64_t)reg_struct.range.len - 1, dev->postcopy_ufd, strerror(errno)); return -1; } VHOST_LOG_CONFIG(dev->ifname, 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); return 0; } #else static int vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused, struct rte_vhost_mem_region *reg __rte_unused) { return -1; } #endif static int vhost_user_postcopy_register(struct virtio_net *dev, int main_fd, struct vhu_msg_context *ctx) { struct VhostUserMemory *memory; struct rte_vhost_mem_region *reg; struct vhu_msg_context ack_ctx; uint32_t i; if (!dev->postcopy_listening) return 0; /* * 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 = &ctx->msg.payload.memory; for (i = 0; i < memory->nregions; i++) { reg = &dev->mem->regions[i]; memory->regions[i].userspace_addr = reg->host_user_addr; } /* Send the addresses back to qemu */ ctx->fd_num = 0; send_vhost_reply(dev, main_fd, ctx); /* Wait for qemu to acknowledge it got the addresses * we've got to wait before we're allowed to generate faults. */ if (read_vhost_message(dev, main_fd, &ack_ctx) <= 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to read qemu ack on postcopy set-mem-table\n"); return -1; } if (validate_msg_fds(dev, &ack_ctx, 0) != 0) return -1; if (ack_ctx.msg.request.master != VHOST_USER_SET_MEM_TABLE) { VHOST_LOG_CONFIG(dev->ifname, ERR, "bad qemu ack on postcopy set-mem-table (%d)\n", ack_ctx.msg.request.master); return -1; } /* Now userfault register and we can use the memory */ for (i = 0; i < memory->nregions; i++) { reg = &dev->mem->regions[i]; if (vhost_user_postcopy_region_register(dev, reg) < 0) return -1; } return 0; } static int vhost_user_mmap_region(struct virtio_net *dev, struct rte_vhost_mem_region *region, uint64_t mmap_offset) { void *mmap_addr; uint64_t mmap_size; uint64_t alignment; int populate; /* Check for memory_size + mmap_offset overflow */ if (mmap_offset >= -region->size) { VHOST_LOG_CONFIG(dev->ifname, ERR, "mmap_offset (%#"PRIx64") and memory_size (%#"PRIx64") overflow\n", mmap_offset, region->size); return -1; } mmap_size = region->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(region->fd); if (alignment == (uint64_t)-1) { VHOST_LOG_CONFIG(dev->ifname, ERR, "couldn't get hugepage size through fstat\n"); return -1; } 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(dev->ifname, ERR, "mmap size (0x%" PRIx64 ") or alignment (0x%" PRIx64 ") is invalid\n", region->size + mmap_offset, alignment); return -1; } populate = dev->async_copy ? MAP_POPULATE : 0; mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED | populate, region->fd, 0); if (mmap_addr == MAP_FAILED) { VHOST_LOG_CONFIG(dev->ifname, ERR, "mmap failed (%s).\n", strerror(errno)); return -1; } region->mmap_addr = mmap_addr; region->mmap_size = mmap_size; region->host_user_addr = (uint64_t)(uintptr_t)mmap_addr + mmap_offset; if (dev->async_copy) { if (add_guest_pages(dev, region, alignment) < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "adding guest pages to region failed.\n"); return -1; } } VHOST_LOG_CONFIG(dev->ifname, INFO, "guest memory region size: 0x%" PRIx64 "\n", region->size); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t guest physical addr: 0x%" PRIx64 "\n", region->guest_phys_addr); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t guest virtual addr: 0x%" PRIx64 "\n", region->guest_user_addr); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t host virtual addr: 0x%" PRIx64 "\n", region->host_user_addr); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t mmap addr : 0x%" PRIx64 "\n", (uint64_t)(uintptr_t)mmap_addr); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t mmap size : 0x%" PRIx64 "\n", mmap_size); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t mmap align: 0x%" PRIx64 "\n", alignment); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t mmap off : 0x%" PRIx64 "\n", mmap_offset); return 0; } static int vhost_user_set_mem_table(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd) { struct virtio_net *dev = *pdev; struct VhostUserMemory *memory = &ctx->msg.payload.memory; struct rte_vhost_mem_region *reg; int numa_node = SOCKET_ID_ANY; uint64_t mmap_offset; uint32_t i; bool async_notify = false; if (validate_msg_fds(dev, ctx, memory->nregions) != 0) return RTE_VHOST_MSG_RESULT_ERR; if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) { VHOST_LOG_CONFIG(dev->ifname, ERR, "too many memory regions (%u)\n", memory->nregions); goto close_msg_fds; } if (dev->mem && !vhost_memory_changed(memory, dev->mem)) { VHOST_LOG_CONFIG(dev->ifname, INFO, "memory regions not changed\n"); close_msg_fds(ctx); return RTE_VHOST_MSG_RESULT_OK; } if (dev->mem) { if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) { struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; if (vdpa_dev && vdpa_dev->ops->dev_close) vdpa_dev->ops->dev_close(dev->vid); dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; } /* notify the vhost application to stop DMA transfers */ if (dev->async_copy && dev->notify_ops->vring_state_changed) { for (i = 0; i < dev->nr_vring; i++) { dev->notify_ops->vring_state_changed(dev->vid, i, 0); } async_notify = true; } 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]); /* * If VQ 0 has already been allocated, try to allocate on the same * NUMA node. It can be reallocated later in numa_realloc(). */ if (dev->nr_vring > 0) numa_node = dev->virtqueue[0]->numa_node; dev->nr_guest_pages = 0; if (dev->guest_pages == NULL) { dev->max_guest_pages = 8; dev->guest_pages = rte_zmalloc_socket(NULL, dev->max_guest_pages * sizeof(struct guest_page), RTE_CACHE_LINE_SIZE, numa_node); if (dev->guest_pages == NULL) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for dev->guest_pages\n"); goto close_msg_fds; } } dev->mem = rte_zmalloc_socket("vhost-mem-table", sizeof(struct rte_vhost_memory) + sizeof(struct rte_vhost_mem_region) * memory->nregions, 0, numa_node); if (dev->mem == NULL) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for dev->mem\n"); goto free_guest_pages; } for (i = 0; i < memory->nregions; i++) { reg = &dev->mem->regions[i]; reg->guest_phys_addr = memory->regions[i].guest_phys_addr; reg->guest_user_addr = memory->regions[i].userspace_addr; reg->size = memory->regions[i].memory_size; reg->fd = ctx->fds[i]; /* * Assign invalid file descriptor value to avoid double * closing on error path. */ ctx->fds[i] = -1; mmap_offset = memory->regions[i].mmap_offset; if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to mmap region %u\n", i); goto free_mem_table; } dev->mem->nregions++; } if (dev->async_copy && rte_vfio_is_enabled("vfio")) async_dma_map(dev, true); if (vhost_user_postcopy_register(dev, main_fd, ctx) < 0) goto free_mem_table; for (i = 0; i < dev->nr_vring; i++) { struct vhost_virtqueue *vq = dev->virtqueue[i]; if (!vq) continue; if (vq->desc || vq->avail || vq->used) { /* * If the memory table got updated, the ring addresses * need to be translated again as virtual addresses have * changed. */ vring_invalidate(dev, vq); translate_ring_addresses(&dev, &vq); *pdev = dev; } } dump_guest_pages(dev); if (async_notify) { for (i = 0; i < dev->nr_vring; i++) dev->notify_ops->vring_state_changed(dev->vid, i, 1); } return RTE_VHOST_MSG_RESULT_OK; free_mem_table: free_mem_region(dev); rte_free(dev->mem); dev->mem = NULL; free_guest_pages: rte_free(dev->guest_pages); dev->guest_pages = NULL; close_msg_fds: close_msg_fds(ctx); return RTE_VHOST_MSG_RESULT_ERR; } static bool vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq) { bool rings_ok; if (!vq) return false; if (vq_is_packed(dev)) rings_ok = vq->desc_packed && vq->driver_event && vq->device_event; else rings_ok = vq->desc && vq->avail && vq->used; return rings_ok && vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD && vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD && vq->enabled; } #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u #define VIRTIO_BLK_NUM_VQS_TO_BE_READY 1u static int virtio_is_ready(struct virtio_net *dev) { struct rte_vdpa_device *vdpa_dev; struct vhost_virtqueue *vq; uint32_t vdpa_type; uint32_t i, nr_vring = dev->nr_vring; if (dev->flags & VIRTIO_DEV_READY) return 1; if (!dev->nr_vring) return 0; vdpa_dev = dev->vdpa_dev; if (vdpa_dev) vdpa_type = vdpa_dev->type; else vdpa_type = -1; if (vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK) { nr_vring = VIRTIO_BLK_NUM_VQS_TO_BE_READY; } else { if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY; } if (dev->nr_vring < nr_vring) return 0; for (i = 0; i < nr_vring; i++) { vq = dev->virtqueue[i]; if (!vq_is_ready(dev, vq)) return 0; } /* If supported, ensure the frontend is really done with config */ if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS)) if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)) return 0; dev->flags |= VIRTIO_DEV_READY; if (!(dev->flags & VIRTIO_DEV_RUNNING)) VHOST_LOG_CONFIG(dev->ifname, INFO, "virtio is now ready for processing.\n"); return 1; } static void * inflight_mem_alloc(struct virtio_net *dev, 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(dev->ifname, ERR, "failed to get inflight buffer fd\n"); return NULL; } unlink(fname); } if (ftruncate(mfd, size) == -1) { VHOST_LOG_CONFIG(dev->ifname, 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(dev->ifname, 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, struct vhu_msg_context *ctx, 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; int numa_node = SOCKET_ID_ANY; void *addr; if (ctx->msg.size != sizeof(ctx->msg.payload.inflight)) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid get_inflight_fd message size is %d\n", ctx->msg.size); return RTE_VHOST_MSG_RESULT_ERR; } /* * If VQ 0 has already been allocated, try to allocate on the same * NUMA node. It can be reallocated later in numa_realloc(). */ if (dev->nr_vring > 0) numa_node = dev->virtqueue[0]->numa_node; if (dev->inflight_info == NULL) { dev->inflight_info = rte_zmalloc_socket("inflight_info", sizeof(struct inflight_mem_info), 0, numa_node); if (!dev->inflight_info) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc dev inflight area\n"); return RTE_VHOST_MSG_RESULT_ERR; } dev->inflight_info->fd = -1; } num_queues = ctx->msg.payload.inflight.num_queues; queue_size = ctx->msg.payload.inflight.queue_size; VHOST_LOG_CONFIG(dev->ifname, INFO, "get_inflight_fd num_queues: %u\n", ctx->msg.payload.inflight.num_queues); VHOST_LOG_CONFIG(dev->ifname, INFO, "get_inflight_fd queue_size: %u\n", ctx->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(dev, "vhost-inflight", mmap_size, &fd); if (!addr) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc vhost inflight area\n"); ctx->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 = ctx->msg.payload.inflight.mmap_size = mmap_size; dev->inflight_info->fd = ctx->fds[0] = fd; ctx->msg.payload.inflight.mmap_offset = 0; ctx->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(dev->ifname, INFO, "send inflight mmap_size: %"PRIu64"\n", ctx->msg.payload.inflight.mmap_size); VHOST_LOG_CONFIG(dev->ifname, INFO, "send inflight mmap_offset: %"PRIu64"\n", ctx->msg.payload.inflight.mmap_offset); VHOST_LOG_CONFIG(dev->ifname, INFO, "send inflight fd: %d\n", ctx->fds[0]); return RTE_VHOST_MSG_RESULT_REPLY; } static int vhost_user_set_inflight_fd(struct virtio_net **pdev, struct vhu_msg_context *ctx, 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; int numa_node = SOCKET_ID_ANY; if (validate_msg_fds(dev, ctx, 1) != 0) return RTE_VHOST_MSG_RESULT_ERR; fd = ctx->fds[0]; if (ctx->msg.size != sizeof(ctx->msg.payload.inflight) || fd < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid set_inflight_fd message size is %d,fd is %d\n", ctx->msg.size, fd); return RTE_VHOST_MSG_RESULT_ERR; } mmap_size = ctx->msg.payload.inflight.mmap_size; mmap_offset = ctx->msg.payload.inflight.mmap_offset; num_queues = ctx->msg.payload.inflight.num_queues; queue_size = ctx->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(dev->ifname, INFO, "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size); VHOST_LOG_CONFIG(dev->ifname, INFO, "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset); VHOST_LOG_CONFIG(dev->ifname, INFO, "set_inflight_fd num_queues: %u\n", num_queues); VHOST_LOG_CONFIG(dev->ifname, INFO, "set_inflight_fd queue_size: %u\n", queue_size); VHOST_LOG_CONFIG(dev->ifname, INFO, "set_inflight_fd fd: %d\n", fd); VHOST_LOG_CONFIG(dev->ifname, INFO, "set_inflight_fd pervq_inflight_size: %d\n", pervq_inflight_size); /* * If VQ 0 has already been allocated, try to allocate on the same * NUMA node. It can be reallocated later in numa_realloc(). */ if (dev->nr_vring > 0) numa_node = dev->virtqueue[0]->numa_node; if (!dev->inflight_info) { dev->inflight_info = rte_zmalloc_socket("inflight_info", sizeof(struct inflight_mem_info), 0, numa_node); if (dev->inflight_info == NULL) { VHOST_LOG_CONFIG(dev->ifname, 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(dev->ifname, ERR, "failed to mmap share memory.\n"); return RTE_VHOST_MSG_RESULT_ERR; } if (dev->inflight_info->fd >= 0) { close(dev->inflight_info->fd); dev->inflight_info->fd = -1; } dev->inflight_info->fd = fd; dev->inflight_info->addr = addr; dev->inflight_info->size = mmap_size; for (i = 0; i < num_queues; i++) { vq = dev->virtqueue[i]; if (!vq) continue; if (vq_is_packed(dev)) { vq->inflight_packed = addr; vq->inflight_packed->desc_num = queue_size; } else { vq->inflight_split = addr; vq->inflight_split->desc_num = queue_size; } addr = (void *)((char *)addr + pervq_inflight_size); } return RTE_VHOST_MSG_RESULT_OK; } static int vhost_user_set_vring_call(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_vring_file file; struct vhost_virtqueue *vq; int expected_fds; expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; if (validate_msg_fds(dev, ctx, expected_fds) != 0) return RTE_VHOST_MSG_RESULT_ERR; file.index = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; if (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) file.fd = VIRTIO_INVALID_EVENTFD; else file.fd = ctx->fds[0]; VHOST_LOG_CONFIG(dev->ifname, INFO, "vring call idx:%d file:%d\n", file.index, file.fd); vq = dev->virtqueue[file.index]; if (vq->ready) { vq->ready = false; vhost_user_notify_queue_state(dev, vq, 0); } if (vq->callfd >= 0) close(vq->callfd); vq->callfd = file.fd; return RTE_VHOST_MSG_RESULT_OK; } static int vhost_user_set_vring_err(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; int expected_fds; expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; if (validate_msg_fds(dev, ctx, expected_fds) != 0) return RTE_VHOST_MSG_RESULT_ERR; if (!(ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK)) close(ctx->fds[0]); VHOST_LOG_CONFIG(dev->ifname, 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_atomic_thread_fence(__ATOMIC_SEQ_CST); 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 = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 0, vq->numa_node); if (!resubmit) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for resubmit info.\n"); return RTE_VHOST_MSG_RESULT_ERR; } resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 0, vq->numa_node); if (!resubmit->resubmit_list) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for inflight desc.\n"); rte_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 = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 0, vq->numa_node); if (resubmit == NULL) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for resubmit info.\n"); return RTE_VHOST_MSG_RESULT_ERR; } resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 0, vq->numa_node); if (resubmit->resubmit_list == NULL) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for resubmit desc.\n"); rte_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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_vring_file file; struct vhost_virtqueue *vq; int expected_fds; expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; if (validate_msg_fds(dev, ctx, expected_fds) != 0) return RTE_VHOST_MSG_RESULT_ERR; file.index = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; if (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) file.fd = VIRTIO_INVALID_EVENTFD; else file.fd = ctx->fds[0]; VHOST_LOG_CONFIG(dev->ifname, INFO, "vring kick idx:%d file:%d\n", file.index, file.fd); /* Interpret ring addresses only when ring is started. */ vq = dev->virtqueue[file.index]; translate_ring_addresses(&dev, &vq); *pdev = dev; /* * 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 = true; } if (vq->ready) { vq->ready = false; vhost_user_notify_queue_state(dev, vq, 0); } if (vq->kickfd >= 0) close(vq->kickfd); vq->kickfd = file.fd; if (vq_is_packed(dev)) { if (vhost_check_queue_inflights_packed(dev, vq)) { VHOST_LOG_CONFIG(dev->ifname, 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(dev->ifname, ERR, "failed to inflights for vq: %d\n", file.index); return RTE_VHOST_MSG_RESULT_ERR; } } return RTE_VHOST_MSG_RESULT_OK; } /* * when virtio is stopped, qemu will send us the GET_VRING_BASE message. */ static int vhost_user_get_vring_base(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; uint64_t val; /* 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; ctx->msg.payload.state.num = val; } else { ctx->msg.payload.state.num = vq->last_avail_idx; } VHOST_LOG_CONFIG(dev->ifname, INFO, "vring base idx:%d file:%d\n", ctx->msg.payload.state.index, ctx->msg.payload.state.num); /* * Based on current qemu vhost-user implementation, this message is * sent and only sent in vhost_vring_stop. * TODO: cleanup the vring, it isn't usable since here. */ if (vq->kickfd >= 0) close(vq->kickfd); vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD; if (vq->callfd >= 0) close(vq->callfd); vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD; vq->signalled_used_valid = false; if (vq_is_packed(dev)) { rte_free(vq->shadow_used_packed); vq->shadow_used_packed = NULL; } else { rte_free(vq->shadow_used_split); vq->shadow_used_split = NULL; } rte_free(vq->batch_copy_elems); vq->batch_copy_elems = NULL; rte_free(vq->log_cache); vq->log_cache = NULL; ctx->msg.size = sizeof(ctx->msg.payload.state); ctx->fd_num = 0; vhost_user_iotlb_flush_all(vq); 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; bool enable = !!ctx->msg.payload.state.num; int index = (int)ctx->msg.payload.state.index; VHOST_LOG_CONFIG(dev->ifname, INFO, "set queue enable: %d to qp idx: %d\n", enable, index); if (enable && dev->virtqueue[index]->async) { if (dev->virtqueue[index]->async->pkts_inflight_n) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to enable vring. Inflight packets must be completed first\n"); return RTE_VHOST_MSG_RESULT_ERR; } } dev->virtqueue[index]->enabled = enable; return RTE_VHOST_MSG_RESULT_OK; } static int vhost_user_get_protocol_features(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; uint64_t features, protocol_features; rte_vhost_driver_get_features(dev->ifname, &features); rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features); ctx->msg.payload.u64 = protocol_features; ctx->msg.size = sizeof(ctx->msg.payload.u64); ctx->fd_num = 0; return RTE_VHOST_MSG_RESULT_REPLY; } static int vhost_user_set_protocol_features(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; uint64_t protocol_features = ctx->msg.payload.u64; uint64_t slave_protocol_features = 0; rte_vhost_driver_get_protocol_features(dev->ifname, &slave_protocol_features); if (protocol_features & ~slave_protocol_features) { VHOST_LOG_CONFIG(dev->ifname, ERR, "received invalid protocol features.\n"); return RTE_VHOST_MSG_RESULT_ERR; } dev->protocol_features = protocol_features; VHOST_LOG_CONFIG(dev->ifname, 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; int fd = ctx->fds[0]; uint64_t size, off; void *addr; uint32_t i; if (validate_msg_fds(dev, ctx, 1) != 0) return RTE_VHOST_MSG_RESULT_ERR; if (fd < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid log fd: %d\n", fd); return RTE_VHOST_MSG_RESULT_ERR; } if (ctx->msg.size != sizeof(VhostUserLog)) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid log base msg size: %"PRId32" != %d\n", ctx->msg.size, (int)sizeof(VhostUserLog)); goto close_msg_fds; } size = ctx->msg.payload.log.mmap_size; off = ctx->msg.payload.log.mmap_offset; /* Check for mmap size and offset overflow. */ if (off >= -size) { VHOST_LOG_CONFIG(dev->ifname, ERR, "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n", off, size); goto close_msg_fds; } VHOST_LOG_CONFIG(dev->ifname, 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(dev->ifname, 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; for (i = 0; i < dev->nr_vring; i++) { struct vhost_virtqueue *vq = dev->virtqueue[i]; rte_free(vq->log_cache); vq->log_cache = NULL; vq->log_cache_nb_elem = 0; vq->log_cache = rte_malloc_socket("vq log cache", sizeof(struct log_cache_entry) * VHOST_LOG_CACHE_NR, 0, vq->numa_node); /* * If log cache alloc fail, don't fail migration, but no * caching will be done, which will impact performance */ if (!vq->log_cache) VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate VQ logging cache\n"); } /* * The spec is not clear about it (yet), but QEMU doesn't expect * any payload in the reply. */ ctx->msg.size = 0; ctx->fd_num = 0; return RTE_VHOST_MSG_RESULT_REPLY; close_msg_fds: close_msg_fds(ctx); return RTE_VHOST_MSG_RESULT_ERR; } static int vhost_user_set_log_fd(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; if (validate_msg_fds(dev, ctx, 1) != 0) return RTE_VHOST_MSG_RESULT_ERR; close(ctx->fds[0]); VHOST_LOG_CONFIG(dev->ifname, 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; uint8_t *mac = (uint8_t *)&ctx->msg.payload.u64; struct rte_vdpa_device *vdpa_dev; VHOST_LOG_CONFIG(dev->ifname, DEBUG, "MAC: " RTE_ETHER_ADDR_PRT_FMT "\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); memcpy(dev->mac.addr_bytes, mac, 6); /* * Set the flag to inject a RARP broadcast packet at * rte_vhost_dequeue_burst(). * * __ATOMIC_RELEASE ordering is for making sure the mac is * copied before the flag is set. */ __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE); vdpa_dev = dev->vdpa_dev; if (vdpa_dev && vdpa_dev->ops->migration_done) vdpa_dev->ops->migration_done(dev->vid); return RTE_VHOST_MSG_RESULT_OK; } static int vhost_user_net_set_mtu(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; if (ctx->msg.payload.u64 < VIRTIO_MIN_MTU || ctx->msg.payload.u64 > VIRTIO_MAX_MTU) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid MTU size (%"PRIu64")\n", ctx->msg.payload.u64); return RTE_VHOST_MSG_RESULT_ERR; } dev->mtu = ctx->msg.payload.u64; return RTE_VHOST_MSG_RESULT_OK; } static int vhost_user_set_req_fd(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; int fd = ctx->fds[0]; if (validate_msg_fds(dev, ctx, 1) != 0) return RTE_VHOST_MSG_RESULT_ERR; if (fd < 0) { VHOST_LOG_CONFIG(dev->ifname, 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_get_config(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; int ret = 0; if (validate_msg_fds(dev, ctx, 0) != 0) return RTE_VHOST_MSG_RESULT_ERR; if (!vdpa_dev) { VHOST_LOG_CONFIG(dev->ifname, ERR, "is not vDPA device!\n"); return RTE_VHOST_MSG_RESULT_ERR; } if (vdpa_dev->ops->get_config) { ret = vdpa_dev->ops->get_config(dev->vid, ctx->msg.payload.cfg.region, ctx->msg.payload.cfg.size); if (ret != 0) { ctx->msg.size = 0; VHOST_LOG_CONFIG(dev->ifname, ERR, "get_config() return error!\n"); } } else { VHOST_LOG_CONFIG(dev->ifname, ERR, "get_config() not supported!\n"); } return RTE_VHOST_MSG_RESULT_REPLY; } static int vhost_user_set_config(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; int ret = 0; if (validate_msg_fds(dev, ctx, 0) != 0) return RTE_VHOST_MSG_RESULT_ERR; if (ctx->msg.payload.cfg.size > VHOST_USER_MAX_CONFIG_SIZE) { VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost_user_config size: %"PRIu32", should not be larger than %d\n", ctx->msg.payload.cfg.size, VHOST_USER_MAX_CONFIG_SIZE); goto out; } if (!vdpa_dev) { VHOST_LOG_CONFIG(dev->ifname, ERR, "is not vDPA device!\n"); goto out; } if (vdpa_dev->ops->set_config) { ret = vdpa_dev->ops->set_config(dev->vid, ctx->msg.payload.cfg.region, ctx->msg.payload.cfg.offset, ctx->msg.payload.cfg.size, ctx->msg.payload.cfg.flags); if (ret) VHOST_LOG_CONFIG(dev->ifname, ERR, "set_config() return error!\n"); } else { VHOST_LOG_CONFIG(dev->ifname, ERR, "set_config() not supported!\n"); } return RTE_VHOST_MSG_RESULT_OK; out: return RTE_VHOST_MSG_RESULT_ERR; } static int vhost_user_iotlb_msg(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; struct vhost_iotlb_msg *imsg = &ctx->msg.payload.iotlb; uint16_t i; uint64_t vva, len; switch (imsg->type) { case VHOST_IOTLB_UPDATE: len = imsg->size; vva = qva_to_vva(dev, imsg->uaddr, &len); if (!vva) return RTE_VHOST_MSG_RESULT_ERR; for (i = 0; i < dev->nr_vring; i++) { struct vhost_virtqueue *vq = dev->virtqueue[i]; if (!vq) continue; vhost_user_iotlb_cache_insert(dev, vq, imsg->iova, vva, len, imsg->perm); if (is_vring_iotlb(dev, vq, imsg)) { rte_spinlock_lock(&vq->access_lock); translate_ring_addresses(&dev, &vq); *pdev = dev; rte_spinlock_unlock(&vq->access_lock); } } break; case VHOST_IOTLB_INVALIDATE: for (i = 0; i < dev->nr_vring; i++) { struct vhost_virtqueue *vq = dev->virtqueue[i]; if (!vq) continue; vhost_user_iotlb_cache_remove(vq, imsg->iova, imsg->size); if (is_vring_iotlb(dev, vq, imsg)) { rte_spinlock_lock(&vq->access_lock); vring_invalidate(dev, vq); rte_spinlock_unlock(&vq->access_lock); } } break; default: VHOST_LOG_CONFIG(dev->ifname, 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; #ifdef RTE_LIBRTE_VHOST_POSTCOPY struct uffdio_api api_struct; dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); if (dev->postcopy_ufd == -1) { VHOST_LOG_CONFIG(dev->ifname, 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(dev->ifname, ERR, "UFFDIO_API ioctl failure: %s\n", strerror(errno)); close(dev->postcopy_ufd); dev->postcopy_ufd = -1; return RTE_VHOST_MSG_RESULT_ERR; } ctx->fds[0] = dev->postcopy_ufd; ctx->fd_num = 1; return RTE_VHOST_MSG_RESULT_REPLY; #else dev->postcopy_ufd = -1; ctx->fd_num = 0; return RTE_VHOST_MSG_RESULT_ERR; #endif } static int vhost_user_set_postcopy_listen(struct virtio_net **pdev, struct vhu_msg_context *ctx __rte_unused, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; if (dev->mem && dev->mem->nregions) { VHOST_LOG_CONFIG(dev->ifname, 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 vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; dev->postcopy_listening = 0; if (dev->postcopy_ufd >= 0) { close(dev->postcopy_ufd); dev->postcopy_ufd = -1; } ctx->msg.payload.u64 = 0; ctx->msg.size = sizeof(ctx->msg.payload.u64); ctx->fd_num = 0; return RTE_VHOST_MSG_RESULT_REPLY; } static int vhost_user_get_status(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; ctx->msg.payload.u64 = dev->status; ctx->msg.size = sizeof(ctx->msg.payload.u64); ctx->fd_num = 0; return RTE_VHOST_MSG_RESULT_REPLY; } static int vhost_user_set_status(struct virtio_net **pdev, struct vhu_msg_context *ctx, int main_fd __rte_unused) { struct virtio_net *dev = *pdev; /* As per Virtio specification, the device status is 8bits long */ if (ctx->msg.payload.u64 > UINT8_MAX) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n", ctx->msg.payload.u64); return RTE_VHOST_MSG_RESULT_ERR; } dev->status = ctx->msg.payload.u64; if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) && (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) { VHOST_LOG_CONFIG(dev->ifname, ERR, "FEATURES_OK bit is set but feature negotiation failed\n"); /* * Clear the bit to let the driver know about the feature * negotiation failure */ dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; } VHOST_LOG_CONFIG(dev->ifname, INFO, "new device status(0x%08x):\n", dev->status); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-RESET: %u\n", (dev->status == VIRTIO_DEVICE_STATUS_RESET)); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-ACKNOWLEDGE: %u\n", !!(dev->status & VIRTIO_DEVICE_STATUS_ACK)); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-DRIVER: %u\n", !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER)); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-FEATURES_OK: %u\n", !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK)); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-DRIVER_OK: %u\n", !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-DEVICE_NEED_RESET: %u\n", !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET)); VHOST_LOG_CONFIG(dev->ifname, INFO, "\t-FAILED: %u\n", !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED)); return RTE_VHOST_MSG_RESULT_OK; } #define VHOST_MESSAGE_HANDLERS \ VHOST_MESSAGE_HANDLER(VHOST_USER_NONE, NULL, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_FEATURES, vhost_user_get_features, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_FEATURES, vhost_user_set_features, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_OWNER, vhost_user_set_owner, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_RESET_OWNER, vhost_user_reset_owner, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_MEM_TABLE, vhost_user_set_mem_table, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_LOG_BASE, vhost_user_set_log_base, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_LOG_FD, vhost_user_set_log_fd, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_NUM, vhost_user_set_vring_num, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_ADDR, vhost_user_set_vring_addr, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_BASE, vhost_user_set_vring_base, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_VRING_BASE, vhost_user_get_vring_base, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_KICK, vhost_user_set_vring_kick, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_CALL, vhost_user_set_vring_call, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_ERR, vhost_user_set_vring_err, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_PROTOCOL_FEATURES, vhost_user_get_protocol_features, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_PROTOCOL_FEATURES, vhost_user_set_protocol_features, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_QUEUE_NUM, vhost_user_get_queue_num, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_ENABLE, vhost_user_set_vring_enable, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SEND_RARP, vhost_user_send_rarp, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_NET_SET_MTU, vhost_user_net_set_mtu, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_SLAVE_REQ_FD, vhost_user_set_req_fd, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_IOTLB_MSG, vhost_user_iotlb_msg, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_CONFIG, vhost_user_get_config, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_CONFIG, vhost_user_set_config, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_ADVISE, vhost_user_set_postcopy_advise, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_LISTEN, vhost_user_set_postcopy_listen, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_END, vhost_user_postcopy_end, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_INFLIGHT_FD, vhost_user_get_inflight_fd, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_INFLIGHT_FD, vhost_user_set_inflight_fd, true) \ VHOST_MESSAGE_HANDLER(VHOST_USER_SET_STATUS, vhost_user_set_status, false) \ VHOST_MESSAGE_HANDLER(VHOST_USER_GET_STATUS, vhost_user_get_status, false) #define VHOST_MESSAGE_HANDLER(id, handler, accepts_fd) \ [id] = { #id, handler, accepts_fd }, static vhost_message_handler_t vhost_message_handlers[] = { VHOST_MESSAGE_HANDLERS }; #undef VHOST_MESSAGE_HANDLER /* return bytes# of read on success or negative val on failure. */ static int read_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) { int ret; ret = read_fd_message(dev->ifname, sockfd, (char *)&ctx->msg, VHOST_USER_HDR_SIZE, ctx->fds, VHOST_MEMORY_MAX_NREGIONS, &ctx->fd_num); if (ret <= 0) { return ret; } else if (ret != VHOST_USER_HDR_SIZE) { VHOST_LOG_CONFIG(dev->ifname, ERR, "Unexpected header size read\n"); close_msg_fds(ctx); return -1; } if (ctx->msg.size) { if (ctx->msg.size > sizeof(ctx->msg.payload)) { VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid msg size: %d\n", ctx->msg.size); return -1; } ret = read(sockfd, &ctx->msg.payload, ctx->msg.size); if (ret <= 0) return ret; if (ret != (int)ctx->msg.size) { VHOST_LOG_CONFIG(dev->ifname, ERR, "read control message failed\n"); return -1; } } return ret; } static int send_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) { if (!ctx) return 0; return send_fd_message(dev->ifname, sockfd, (char *)&ctx->msg, VHOST_USER_HDR_SIZE + ctx->msg.size, ctx->fds, ctx->fd_num); } static int send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) { if (!ctx) return 0; ctx->msg.flags &= ~VHOST_USER_VERSION_MASK; ctx->msg.flags &= ~VHOST_USER_NEED_REPLY; ctx->msg.flags |= VHOST_USER_VERSION; ctx->msg.flags |= VHOST_USER_REPLY_MASK; return send_vhost_message(dev, sockfd, ctx); } static int send_vhost_slave_message(struct virtio_net *dev, struct vhu_msg_context *ctx) { int ret; if (ctx->msg.flags & VHOST_USER_NEED_REPLY) rte_spinlock_lock(&dev->slave_req_lock); ret = send_vhost_message(dev, dev->slave_req_fd, ctx); if (ret < 0 && (ctx->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 vhu_msg_context *ctx) { uint32_t vring_idx; switch (ctx->msg.request.master) { case VHOST_USER_SET_VRING_KICK: case VHOST_USER_SET_VRING_CALL: case VHOST_USER_SET_VRING_ERR: vring_idx = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; break; case VHOST_USER_SET_VRING_NUM: case VHOST_USER_SET_VRING_BASE: case VHOST_USER_GET_VRING_BASE: case VHOST_USER_SET_VRING_ENABLE: vring_idx = ctx->msg.payload.state.index; break; case VHOST_USER_SET_VRING_ADDR: vring_idx = ctx->msg.payload.addr.index; break; case VHOST_USER_SET_INFLIGHT_FD: vring_idx = ctx->msg.payload.inflight.num_queues - 1; break; default: return 0; } if (vring_idx >= VHOST_MAX_VRING) { VHOST_LOG_CONFIG(dev->ifname, 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 vhu_msg_context ctx; vhost_message_handler_t *msg_handler; struct rte_vdpa_device *vdpa_dev; int msg_result = RTE_VHOST_MSG_RESULT_OK; int ret; int unlock_required = 0; bool handled; uint32_t request; uint32_t i; uint16_t blk_call_fd; 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(dev->ifname, ERR, "failed to get callback ops for driver\n"); return -1; } } ret = read_vhost_message(dev, fd, &ctx); if (ret <= 0) { if (ret < 0) VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost read message failed\n"); else VHOST_LOG_CONFIG(dev->ifname, INFO, "vhost peer closed\n"); return -1; } request = ctx.msg.request.master; if (request > VHOST_USER_NONE && request < RTE_DIM(vhost_message_handlers)) msg_handler = &vhost_message_handlers[request]; else msg_handler = NULL; if (msg_handler != NULL && msg_handler->description != NULL) { if (request != VHOST_USER_IOTLB_MSG) VHOST_LOG_CONFIG(dev->ifname, INFO, "read message %s\n", msg_handler->description); else VHOST_LOG_CONFIG(dev->ifname, DEBUG, "read message %s\n", msg_handler->description); } else { VHOST_LOG_CONFIG(dev->ifname, DEBUG, "external request %d\n", request); } ret = vhost_user_check_and_alloc_queue_pair(dev, &ctx); if (ret < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc queue\n"); return -1; } /* * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops * and device is destroyed. destroy_device waits for queues to be * inactive, so it is safe. Otherwise taking the access_lock * would cause a dead lock. */ switch (request) { case VHOST_USER_SET_FEATURES: case VHOST_USER_SET_PROTOCOL_FEATURES: case VHOST_USER_SET_OWNER: case VHOST_USER_SET_MEM_TABLE: case VHOST_USER_SET_LOG_BASE: case VHOST_USER_SET_LOG_FD: case VHOST_USER_SET_VRING_NUM: case VHOST_USER_SET_VRING_ADDR: case VHOST_USER_SET_VRING_BASE: case VHOST_USER_SET_VRING_KICK: case VHOST_USER_SET_VRING_CALL: case VHOST_USER_SET_VRING_ERR: case VHOST_USER_SET_VRING_ENABLE: case VHOST_USER_SEND_RARP: case VHOST_USER_NET_SET_MTU: case VHOST_USER_SET_SLAVE_REQ_FD: if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { vhost_user_lock_all_queue_pairs(dev); unlock_required = 1; } break; default: break; } handled = false; if (dev->extern_ops.pre_msg_handle) { RTE_BUILD_BUG_ON(offsetof(struct vhu_msg_context, msg) != 0); msg_result = (*dev->extern_ops.pre_msg_handle)(dev->vid, &ctx); switch (msg_result) { case RTE_VHOST_MSG_RESULT_REPLY: send_vhost_reply(dev, fd, &ctx); /* 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 (msg_handler == NULL || msg_handler->callback == NULL) goto skip_to_post_handle; if (!msg_handler->accepts_fd && validate_msg_fds(dev, &ctx, 0) != 0) { msg_result = RTE_VHOST_MSG_RESULT_ERR; } else { msg_result = msg_handler->callback(&dev, &ctx, fd); } switch (msg_result) { case RTE_VHOST_MSG_RESULT_ERR: VHOST_LOG_CONFIG(dev->ifname, ERR, "processing %s failed.\n", msg_handler->description); handled = true; break; case RTE_VHOST_MSG_RESULT_OK: VHOST_LOG_CONFIG(dev->ifname, DEBUG, "processing %s succeeded.\n", msg_handler->description); handled = true; break; case RTE_VHOST_MSG_RESULT_REPLY: VHOST_LOG_CONFIG(dev->ifname, DEBUG, "processing %s succeeded and needs reply.\n", msg_handler->description); send_vhost_reply(dev, fd, &ctx); handled = true; break; default: break; } skip_to_post_handle: if (msg_result != RTE_VHOST_MSG_RESULT_ERR && dev->extern_ops.post_msg_handle) { RTE_BUILD_BUG_ON(offsetof(struct vhu_msg_context, msg) != 0); msg_result = (*dev->extern_ops.post_msg_handle)(dev->vid, &ctx); switch (msg_result) { case RTE_VHOST_MSG_RESULT_REPLY: send_vhost_reply(dev, fd, &ctx); /* 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 message was not handled at this stage, treat it as an error */ if (!handled) { VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost message (req: %d) was not handled.\n", request); close_msg_fds(&ctx); msg_result = 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 (ctx.msg.flags & VHOST_USER_NEED_REPLY) { ctx.msg.payload.u64 = msg_result == RTE_VHOST_MSG_RESULT_ERR; ctx.msg.size = sizeof(ctx.msg.payload.u64); ctx.fd_num = 0; send_vhost_reply(dev, fd, &ctx); } else if (msg_result == RTE_VHOST_MSG_RESULT_ERR) { VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost message handling failed.\n"); ret = -1; goto unlock; } for (i = 0; i < dev->nr_vring; i++) { struct vhost_virtqueue *vq = dev->virtqueue[i]; bool cur_ready = vq_is_ready(dev, vq); if (cur_ready != (vq && vq->ready)) { vq->ready = cur_ready; vhost_user_notify_queue_state(dev, vq, cur_ready); } } unlock: if (unlock_required) vhost_user_unlock_all_queue_pairs(dev); if (ret != 0 || !virtio_is_ready(dev)) goto out; /* * Virtio is now ready. If not done already, it is time * to notify the application it can process the rings and * configure the vDPA device if present. */ if (!(dev->flags & VIRTIO_DEV_RUNNING)) { if (dev->notify_ops->new_device(dev->vid) == 0) dev->flags |= VIRTIO_DEV_RUNNING; } vdpa_dev = dev->vdpa_dev; if (!vdpa_dev) goto out; if (vdpa_dev->type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK) { if (request == VHOST_USER_SET_VRING_CALL) { blk_call_fd = ctx.msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; if (blk_call_fd != dev->nr_vring - 1) goto out; } else { goto out; } } if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { if (vdpa_dev->ops->dev_conf(dev->vid)) VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to configure vDPA device\n"); else dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED; } out: return ret; } static int process_slave_message_reply(struct virtio_net *dev, const struct vhu_msg_context *ctx) { struct vhu_msg_context msg_reply; int ret; if ((ctx->msg.flags & VHOST_USER_NEED_REPLY) == 0) return 0; ret = read_vhost_message(dev, dev->slave_req_fd, &msg_reply); if (ret <= 0) { if (ret < 0) VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost read slave message reply failed\n"); else VHOST_LOG_CONFIG(dev->ifname, INFO, "vhost peer closed\n"); ret = -1; goto out; } ret = 0; if (msg_reply.msg.request.slave != ctx->msg.request.slave) { VHOST_LOG_CONFIG(dev->ifname, ERR, "received unexpected msg type (%u), expected %u\n", msg_reply.msg.request.slave, ctx->msg.request.slave); ret = -1; goto out; } ret = msg_reply.msg.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 vhu_msg_context ctx = { .msg = { .request.slave = VHOST_USER_SLAVE_IOTLB_MSG, .flags = VHOST_USER_VERSION, .size = sizeof(ctx.msg.payload.iotlb), .payload.iotlb = { .iova = iova, .perm = perm, .type = VHOST_IOTLB_MISS, }, }, }; ret = send_vhost_message(dev, dev->slave_req_fd, &ctx); if (ret < 0) { VHOST_LOG_CONFIG(dev->ifname, 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 vhu_msg_context ctx = { .msg = { .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG, .flags = VHOST_USER_VERSION, .size = 0, } }; if (need_reply) ctx.msg.flags |= VHOST_USER_NEED_REPLY; ret = send_vhost_slave_message(dev, &ctx); if (ret < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to send config change (%d)\n", ret); return ret; } return process_slave_message_reply(dev, &ctx); } 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 vhu_msg_context ctx = { .msg = { .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG, .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY, .size = sizeof(ctx.msg.payload.area), .payload.area = { .u64 = index & VHOST_USER_VRING_IDX_MASK, .size = size, .offset = offset, }, }, }; if (fd < 0) ctx.msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK; else { ctx.fds[0] = fd; ctx.fd_num = 1; } ret = send_vhost_slave_message(dev, &ctx); if (ret < 0) { VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to set host notifier (%d)\n", ret); return ret; } return process_slave_message_reply(dev, &ctx); } int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable) { struct virtio_net *dev; struct rte_vdpa_device *vdpa_dev; int vfio_device_fd, ret = 0; uint64_t offset, size; unsigned int i, q_start, q_last; dev = get_device(vid); if (!dev) return -ENODEV; vdpa_dev = dev->vdpa_dev; if (vdpa_dev == NULL) return -ENODEV; if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) || !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) || !(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) || !(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) || !(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER))) return -ENOTSUP; if (qid == RTE_VHOST_QUEUE_ALL) { q_start = 0; q_last = dev->nr_vring - 1; } else { if (qid >= dev->nr_vring) return -EINVAL; q_start = qid; q_last = qid; } if (vdpa_dev->ops->get_vfio_device_fd == NULL) return -ENOTSUP; if (vdpa_dev->ops->get_notify_area == NULL) return -ENOTSUP; vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid); if (vfio_device_fd < 0) return -ENOTSUP; if (enable) { for (i = q_start; i <= q_last; i++) { if (vdpa_dev->ops->get_notify_area(vid, i, &offset, &size) < 0) { ret = -ENOTSUP; goto disable; } if (vhost_user_slave_set_vring_host_notifier(dev, i, vfio_device_fd, offset, size) < 0) { ret = -EFAULT; goto disable; } } } else { disable: for (i = q_start; i <= q_last; i++) { vhost_user_slave_set_vring_host_notifier(dev, i, -1, 0, 0); } } return ret; }