| 24 | }; |
| 25 | |
| 26 | static int |
| 27 | virtio_net_ctrl_pop(struct virtio_net *dev, struct vhost_virtqueue *cvq, |
| 28 | struct virtio_net_ctrl_elem *ctrl_elem) |
| 29 | __rte_shared_locks_required(&cvq->iotlb_lock) |
| 30 | { |
| 31 | uint16_t avail_idx, desc_idx, n_descs = 0; |
| 32 | uint64_t desc_len, desc_addr, desc_iova, data_len = 0; |
| 33 | uint8_t *ctrl_req; |
| 34 | struct vring_desc *descs; |
| 35 | |
| 36 | avail_idx = rte_atomic_load_explicit((unsigned short __rte_atomic *)&cvq->avail->idx, |
| 37 | rte_memory_order_acquire); |
| 38 | if (avail_idx == cvq->last_avail_idx) { |
| 39 | VHOST_LOG_CONFIG(dev->ifname, DEBUG, "Control queue empty\n"); |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | desc_idx = cvq->avail->ring[cvq->last_avail_idx & (cvq->size - 1)]; |
| 44 | if (desc_idx >= cvq->size) { |
| 45 | VHOST_LOG_CONFIG(dev->ifname, ERR, "Out of range desc index, dropping\n"); |
| 46 | goto err; |
| 47 | } |
| 48 | |
| 49 | ctrl_elem->head_idx = desc_idx; |
| 50 | |
| 51 | if (cvq->desc[desc_idx].flags & VRING_DESC_F_INDIRECT) { |
| 52 | desc_len = cvq->desc[desc_idx].len; |
| 53 | desc_iova = cvq->desc[desc_idx].addr; |
| 54 | |
| 55 | descs = (struct vring_desc *)(uintptr_t)vhost_iova_to_vva(dev, cvq, |
| 56 | desc_iova, &desc_len, VHOST_ACCESS_RO); |
| 57 | if (!descs || desc_len != cvq->desc[desc_idx].len) { |
| 58 | VHOST_LOG_CONFIG(dev->ifname, ERR, "Failed to map ctrl indirect descs\n"); |
| 59 | goto err; |
| 60 | } |
| 61 | |
| 62 | desc_idx = 0; |
| 63 | } else { |
| 64 | descs = cvq->desc; |
| 65 | } |
| 66 | |
| 67 | while (1) { |
| 68 | desc_len = descs[desc_idx].len; |
| 69 | desc_iova = descs[desc_idx].addr; |
| 70 | |
| 71 | n_descs++; |
| 72 | |
| 73 | if (descs[desc_idx].flags & VRING_DESC_F_WRITE) { |
| 74 | if (ctrl_elem->desc_ack) { |
| 75 | VHOST_LOG_CONFIG(dev->ifname, ERR, |
| 76 | "Unexpected ctrl chain layout\n"); |
| 77 | goto err; |
| 78 | } |
| 79 | |
| 80 | if (desc_len != sizeof(uint8_t)) { |
| 81 | VHOST_LOG_CONFIG(dev->ifname, ERR, |
| 82 | "Invalid ack size for ctrl req, dropping\n"); |
| 83 | goto err; |
no test coverage detected