1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2018 Intel Corporation 3 */ 4 5 /* Security model 6 * -------------- 7 * The vhost-user protocol connection is an external interface, so it must be 8 * robust against invalid inputs. 9 * 10 * This is important because the vhost-user frontend is only one step removed 11 * from the guest. Malicious guests that have escaped will then launch further 12 * attacks from the vhost-user frontend. 13 * 14 * Even in deployments where guests are trusted, a bug in the vhost-user frontend 15 * can still cause invalid messages to be sent. Such messages must not 16 * compromise the stability of the DPDK application by causing crashes, memory 17 * corruption, or other problematic behavior. 18 * 19 * Do not assume received VhostUserMsg fields contain sensible values! 20 */ 21 22 #include <stdint.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <unistd.h> 27 #include <fcntl.h> 28 #include <sys/ioctl.h> 29 #include <sys/mman.h> 30 #include <sys/stat.h> 31 #include <sys/syscall.h> 32 #ifdef RTE_LIBRTE_VHOST_NUMA 33 #include <numaif.h> 34 #endif 35 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 36 #include <linux/userfaultfd.h> 37 #endif 38 #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */ 39 #include <linux/memfd.h> 40 #define MEMFD_SUPPORTED 41 #endif 42 43 #include <rte_common.h> 44 #include <rte_malloc.h> 45 #include <rte_log.h> 46 #include <rte_vfio.h> 47 #include <rte_errno.h> 48 49 #include "iotlb.h" 50 #include "vhost.h" 51 #include "vhost_user.h" 52 53 #define VIRTIO_MIN_MTU 68 54 #define VIRTIO_MAX_MTU 65535 55 56 #define INFLIGHT_ALIGNMENT 64 57 #define INFLIGHT_VERSION 0x1 58 59 typedef struct vhost_message_handler { 60 const char *description; 61 int (*callback)(struct virtio_net **pdev, struct vhu_msg_context *ctx, 62 int main_fd); 63 bool accepts_fd; 64 } vhost_message_handler_t; 65 static vhost_message_handler_t vhost_message_handlers[]; 66 67 static int send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx); 68 static int read_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx); 69 70 static void 71 close_msg_fds(struct vhu_msg_context *ctx) 72 { 73 int i; 74 75 for (i = 0; i < ctx->fd_num; i++) { 76 int fd = ctx->fds[i]; 77 78 if (fd == -1) 79 continue; 80 81 ctx->fds[i] = -1; 82 close(fd); 83 } 84 } 85 86 /* 87 * Ensure the expected number of FDs is received, 88 * close all FDs and return an error if this is not the case. 89 */ 90 static int 91 validate_msg_fds(struct virtio_net *dev, struct vhu_msg_context *ctx, int expected_fds) 92 { 93 if (ctx->fd_num == expected_fds) 94 return 0; 95 96 VHOST_LOG_CONFIG(dev->ifname, ERR, 97 "expect %d FDs for request %s, received %d\n", 98 expected_fds, vhost_message_handlers[ctx->msg.request.frontend].description, 99 ctx->fd_num); 100 101 close_msg_fds(ctx); 102 103 return -1; 104 } 105 106 static uint64_t 107 get_blk_size(int fd) 108 { 109 struct stat stat; 110 int ret; 111 112 ret = fstat(fd, &stat); 113 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize; 114 } 115 116 static void 117 async_dma_map(struct virtio_net *dev, bool do_map) 118 { 119 int ret = 0; 120 uint32_t i; 121 struct guest_page *page; 122 123 if (do_map) { 124 for (i = 0; i < dev->nr_guest_pages; i++) { 125 page = &dev->guest_pages[i]; 126 ret = rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD, 127 page->host_user_addr, 128 page->host_iova, 129 page->size); 130 if (ret) { 131 /* 132 * DMA device may bind with kernel driver, in this case, 133 * we don't need to program IOMMU manually. However, if no 134 * device is bound with vfio/uio in DPDK, and vfio kernel 135 * module is loaded, the API will still be called and return 136 * with ENODEV. 137 * 138 * DPDK vfio only returns ENODEV in very similar situations 139 * (vfio either unsupported, or supported but no devices found). 140 * Either way, no mappings could be performed. We treat it as 141 * normal case in async path. This is a workaround. 142 */ 143 if (rte_errno == ENODEV) 144 return; 145 146 /* DMA mapping errors won't stop VHOST_USER_SET_MEM_TABLE. */ 147 VHOST_LOG_CONFIG(dev->ifname, ERR, "DMA engine map failed\n"); 148 } 149 } 150 151 } else { 152 for (i = 0; i < dev->nr_guest_pages; i++) { 153 page = &dev->guest_pages[i]; 154 ret = rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD, 155 page->host_user_addr, 156 page->host_iova, 157 page->size); 158 if (ret) { 159 /* like DMA map, ignore the kernel driver case when unmap. */ 160 if (rte_errno == EINVAL) 161 return; 162 163 VHOST_LOG_CONFIG(dev->ifname, ERR, "DMA engine unmap failed\n"); 164 } 165 } 166 } 167 } 168 169 static void 170 free_mem_region(struct virtio_net *dev) 171 { 172 uint32_t i; 173 struct rte_vhost_mem_region *reg; 174 175 if (!dev || !dev->mem) 176 return; 177 178 if (dev->async_copy && rte_vfio_is_enabled("vfio")) 179 async_dma_map(dev, false); 180 181 for (i = 0; i < dev->mem->nregions; i++) { 182 reg = &dev->mem->regions[i]; 183 if (reg->host_user_addr) { 184 munmap(reg->mmap_addr, reg->mmap_size); 185 close(reg->fd); 186 } 187 } 188 } 189 190 void 191 vhost_backend_cleanup(struct virtio_net *dev) 192 { 193 struct rte_vdpa_device *vdpa_dev; 194 195 vdpa_dev = dev->vdpa_dev; 196 if (vdpa_dev && vdpa_dev->ops->dev_cleanup != NULL) 197 vdpa_dev->ops->dev_cleanup(dev->vid); 198 199 if (dev->mem) { 200 free_mem_region(dev); 201 rte_free(dev->mem); 202 dev->mem = NULL; 203 } 204 205 rte_free(dev->guest_pages); 206 dev->guest_pages = NULL; 207 208 if (dev->log_addr) { 209 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size); 210 dev->log_addr = 0; 211 } 212 213 if (dev->inflight_info) { 214 if (dev->inflight_info->addr) { 215 munmap(dev->inflight_info->addr, 216 dev->inflight_info->size); 217 dev->inflight_info->addr = NULL; 218 } 219 220 if (dev->inflight_info->fd >= 0) { 221 close(dev->inflight_info->fd); 222 dev->inflight_info->fd = -1; 223 } 224 225 rte_free(dev->inflight_info); 226 dev->inflight_info = NULL; 227 } 228 229 if (dev->backend_req_fd >= 0) { 230 close(dev->backend_req_fd); 231 dev->backend_req_fd = -1; 232 } 233 234 if (dev->postcopy_ufd >= 0) { 235 close(dev->postcopy_ufd); 236 dev->postcopy_ufd = -1; 237 } 238 239 dev->postcopy_listening = 0; 240 241 vhost_user_iotlb_destroy(dev); 242 } 243 244 static void 245 vhost_user_notify_queue_state(struct virtio_net *dev, struct vhost_virtqueue *vq, 246 int enable) 247 { 248 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 249 250 /* Configure guest notifications on enable */ 251 if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF) 252 vhost_enable_guest_notification(dev, vq, vq->notif_enable); 253 254 if (vdpa_dev && vdpa_dev->ops->set_vring_state) 255 vdpa_dev->ops->set_vring_state(dev->vid, vq->index, enable); 256 257 if (dev->notify_ops->vring_state_changed) 258 dev->notify_ops->vring_state_changed(dev->vid, vq->index, enable); 259 } 260 261 /* 262 * This function just returns success at the moment unless 263 * the device hasn't been initialised. 264 */ 265 static int 266 vhost_user_set_owner(struct virtio_net **pdev __rte_unused, 267 struct vhu_msg_context *ctx __rte_unused, 268 int main_fd __rte_unused) 269 { 270 return RTE_VHOST_MSG_RESULT_OK; 271 } 272 273 static int 274 vhost_user_reset_owner(struct virtio_net **pdev, 275 struct vhu_msg_context *ctx __rte_unused, 276 int main_fd __rte_unused) 277 { 278 struct virtio_net *dev = *pdev; 279 280 vhost_destroy_device_notify(dev); 281 282 cleanup_device(dev, 0); 283 reset_device(dev); 284 return RTE_VHOST_MSG_RESULT_OK; 285 } 286 287 /* 288 * The features that we support are requested. 289 */ 290 static int 291 vhost_user_get_features(struct virtio_net **pdev, 292 struct vhu_msg_context *ctx, 293 int main_fd __rte_unused) 294 { 295 struct virtio_net *dev = *pdev; 296 uint64_t features = 0; 297 298 rte_vhost_driver_get_features(dev->ifname, &features); 299 300 ctx->msg.payload.u64 = features; 301 ctx->msg.size = sizeof(ctx->msg.payload.u64); 302 ctx->fd_num = 0; 303 304 return RTE_VHOST_MSG_RESULT_REPLY; 305 } 306 307 /* 308 * The queue number that we support are requested. 309 */ 310 static int 311 vhost_user_get_queue_num(struct virtio_net **pdev, 312 struct vhu_msg_context *ctx, 313 int main_fd __rte_unused) 314 { 315 struct virtio_net *dev = *pdev; 316 uint32_t queue_num = 0; 317 318 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num); 319 320 ctx->msg.payload.u64 = (uint64_t)queue_num; 321 ctx->msg.size = sizeof(ctx->msg.payload.u64); 322 ctx->fd_num = 0; 323 324 return RTE_VHOST_MSG_RESULT_REPLY; 325 } 326 327 /* 328 * We receive the negotiated features supported by us and the virtio device. 329 */ 330 static int 331 vhost_user_set_features(struct virtio_net **pdev, 332 struct vhu_msg_context *ctx, 333 int main_fd __rte_unused) 334 { 335 struct virtio_net *dev = *pdev; 336 uint64_t features = ctx->msg.payload.u64; 337 uint64_t vhost_features = 0; 338 struct rte_vdpa_device *vdpa_dev; 339 340 rte_vhost_driver_get_features(dev->ifname, &vhost_features); 341 if (features & ~vhost_features) { 342 VHOST_LOG_CONFIG(dev->ifname, ERR, "received invalid negotiated features.\n"); 343 dev->flags |= VIRTIO_DEV_FEATURES_FAILED; 344 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; 345 346 return RTE_VHOST_MSG_RESULT_ERR; 347 } 348 349 if (dev->flags & VIRTIO_DEV_RUNNING) { 350 if (dev->features == features) 351 return RTE_VHOST_MSG_RESULT_OK; 352 353 /* 354 * Error out if frontend tries to change features while device is 355 * in running state. The exception being VHOST_F_LOG_ALL, which 356 * is enabled when the live-migration starts. 357 */ 358 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) { 359 VHOST_LOG_CONFIG(dev->ifname, ERR, 360 "features changed while device is running.\n"); 361 return RTE_VHOST_MSG_RESULT_ERR; 362 } 363 364 if (dev->notify_ops->features_changed) 365 dev->notify_ops->features_changed(dev->vid, features); 366 } 367 368 dev->features = features; 369 if (dev->features & 370 ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | 371 (1ULL << VIRTIO_F_VERSION_1) | 372 (1ULL << VIRTIO_F_RING_PACKED))) { 373 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf); 374 } else { 375 dev->vhost_hlen = sizeof(struct virtio_net_hdr); 376 } 377 VHOST_LOG_CONFIG(dev->ifname, INFO, 378 "negotiated Virtio features: 0x%" PRIx64 "\n", 379 dev->features); 380 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 381 "mergeable RX buffers %s, virtio 1 %s\n", 382 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off", 383 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off"); 384 385 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) && 386 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) { 387 /* 388 * Remove all but first queue pair if MQ hasn't been 389 * negotiated. This is safe because the device is not 390 * running at this stage. 391 */ 392 while (dev->nr_vring > 2) { 393 struct vhost_virtqueue *vq; 394 395 vq = dev->virtqueue[--dev->nr_vring]; 396 if (!vq) 397 continue; 398 399 dev->virtqueue[dev->nr_vring] = NULL; 400 cleanup_vq(vq, 1); 401 cleanup_vq_inflight(dev, vq); 402 /* vhost_user_lock_all_queue_pairs locked all qps */ 403 vq_assert_lock(dev, vq); 404 rte_rwlock_write_unlock(&vq->access_lock); 405 free_vq(dev, vq); 406 } 407 } 408 409 vdpa_dev = dev->vdpa_dev; 410 if (vdpa_dev) 411 vdpa_dev->ops->set_features(dev->vid); 412 413 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED; 414 return RTE_VHOST_MSG_RESULT_OK; 415 } 416 417 /* 418 * The virtio device sends us the size of the descriptor ring. 419 */ 420 static int 421 vhost_user_set_vring_num(struct virtio_net **pdev, 422 struct vhu_msg_context *ctx, 423 int main_fd __rte_unused) 424 { 425 struct virtio_net *dev = *pdev; 426 struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; 427 428 if (ctx->msg.payload.state.num > 32768) { 429 VHOST_LOG_CONFIG(dev->ifname, ERR, 430 "invalid virtqueue size %u\n", 431 ctx->msg.payload.state.num); 432 return RTE_VHOST_MSG_RESULT_ERR; 433 } 434 435 vq->size = ctx->msg.payload.state.num; 436 437 /* VIRTIO 1.0, 2.4 Virtqueues says: 438 * 439 * Queue Size value is always a power of 2. The maximum Queue Size 440 * value is 32768. 441 * 442 * VIRTIO 1.1 2.7 Virtqueues says: 443 * 444 * Packed virtqueues support up to 2^15 entries each. 445 */ 446 if (!vq_is_packed(dev)) { 447 if (vq->size & (vq->size - 1)) { 448 VHOST_LOG_CONFIG(dev->ifname, ERR, 449 "invalid virtqueue size %u\n", 450 vq->size); 451 return RTE_VHOST_MSG_RESULT_ERR; 452 } 453 } 454 455 if (vq_is_packed(dev)) { 456 rte_free(vq->shadow_used_packed); 457 vq->shadow_used_packed = rte_malloc_socket(NULL, 458 vq->size * 459 sizeof(struct vring_used_elem_packed), 460 RTE_CACHE_LINE_SIZE, vq->numa_node); 461 if (!vq->shadow_used_packed) { 462 VHOST_LOG_CONFIG(dev->ifname, ERR, 463 "failed to allocate memory for shadow used ring.\n"); 464 return RTE_VHOST_MSG_RESULT_ERR; 465 } 466 467 } else { 468 rte_free(vq->shadow_used_split); 469 470 vq->shadow_used_split = rte_malloc_socket(NULL, 471 vq->size * sizeof(struct vring_used_elem), 472 RTE_CACHE_LINE_SIZE, vq->numa_node); 473 474 if (!vq->shadow_used_split) { 475 VHOST_LOG_CONFIG(dev->ifname, ERR, 476 "failed to allocate memory for vq internal data.\n"); 477 return RTE_VHOST_MSG_RESULT_ERR; 478 } 479 } 480 481 rte_free(vq->batch_copy_elems); 482 vq->batch_copy_elems = rte_malloc_socket(NULL, 483 vq->size * sizeof(struct batch_copy_elem), 484 RTE_CACHE_LINE_SIZE, vq->numa_node); 485 if (!vq->batch_copy_elems) { 486 VHOST_LOG_CONFIG(dev->ifname, ERR, 487 "failed to allocate memory for batching copy.\n"); 488 return RTE_VHOST_MSG_RESULT_ERR; 489 } 490 491 return RTE_VHOST_MSG_RESULT_OK; 492 } 493 494 /* 495 * Reallocate virtio_dev, vhost_virtqueue and related data structures to 496 * make them on the same numa node as the memory of vring descriptor. 497 */ 498 #ifdef RTE_LIBRTE_VHOST_NUMA 499 static void 500 numa_realloc(struct virtio_net **pdev, struct vhost_virtqueue **pvq) 501 { 502 int node, dev_node; 503 struct virtio_net *dev; 504 struct vhost_virtqueue *vq; 505 struct batch_copy_elem *bce; 506 struct guest_page *gp; 507 struct rte_vhost_memory *mem; 508 size_t mem_size; 509 int ret; 510 511 dev = *pdev; 512 vq = *pvq; 513 514 /* 515 * If VQ is ready, it is too late to reallocate, it certainly already 516 * happened anyway on VHOST_USER_SET_VRING_ADRR. 517 */ 518 if (vq->ready) 519 return; 520 521 ret = get_mempolicy(&node, NULL, 0, vq->desc, MPOL_F_NODE | MPOL_F_ADDR); 522 if (ret) { 523 VHOST_LOG_CONFIG(dev->ifname, ERR, 524 "unable to get virtqueue %d numa information.\n", 525 vq->index); 526 return; 527 } 528 529 if (node == vq->numa_node) 530 goto out_dev_realloc; 531 532 vq = rte_realloc_socket(*pvq, sizeof(**pvq), 0, node); 533 if (!vq) { 534 VHOST_LOG_CONFIG(dev->ifname, ERR, 535 "failed to realloc virtqueue %d on node %d\n", 536 (*pvq)->index, node); 537 return; 538 } 539 *pvq = vq; 540 541 if (vq != dev->virtqueue[vq->index]) { 542 VHOST_LOG_CONFIG(dev->ifname, INFO, "reallocated virtqueue on node %d\n", node); 543 dev->virtqueue[vq->index] = vq; 544 } 545 546 if (vq_is_packed(dev)) { 547 struct vring_used_elem_packed *sup; 548 549 sup = rte_realloc_socket(vq->shadow_used_packed, vq->size * sizeof(*sup), 550 RTE_CACHE_LINE_SIZE, node); 551 if (!sup) { 552 VHOST_LOG_CONFIG(dev->ifname, ERR, 553 "failed to realloc shadow packed on node %d\n", 554 node); 555 return; 556 } 557 vq->shadow_used_packed = sup; 558 } else { 559 struct vring_used_elem *sus; 560 561 sus = rte_realloc_socket(vq->shadow_used_split, vq->size * sizeof(*sus), 562 RTE_CACHE_LINE_SIZE, node); 563 if (!sus) { 564 VHOST_LOG_CONFIG(dev->ifname, ERR, 565 "failed to realloc shadow split on node %d\n", 566 node); 567 return; 568 } 569 vq->shadow_used_split = sus; 570 } 571 572 bce = rte_realloc_socket(vq->batch_copy_elems, vq->size * sizeof(*bce), 573 RTE_CACHE_LINE_SIZE, node); 574 if (!bce) { 575 VHOST_LOG_CONFIG(dev->ifname, ERR, 576 "failed to realloc batch copy elem on node %d\n", 577 node); 578 return; 579 } 580 vq->batch_copy_elems = bce; 581 582 if (vq->log_cache) { 583 struct log_cache_entry *lc; 584 585 lc = rte_realloc_socket(vq->log_cache, sizeof(*lc) * VHOST_LOG_CACHE_NR, 0, node); 586 if (!lc) { 587 VHOST_LOG_CONFIG(dev->ifname, ERR, 588 "failed to realloc log cache on node %d\n", 589 node); 590 return; 591 } 592 vq->log_cache = lc; 593 } 594 595 if (vq->resubmit_inflight) { 596 struct rte_vhost_resubmit_info *ri; 597 598 ri = rte_realloc_socket(vq->resubmit_inflight, sizeof(*ri), 0, node); 599 if (!ri) { 600 VHOST_LOG_CONFIG(dev->ifname, ERR, 601 "failed to realloc resubmit inflight on node %d\n", 602 node); 603 return; 604 } 605 vq->resubmit_inflight = ri; 606 607 if (ri->resubmit_list) { 608 struct rte_vhost_resubmit_desc *rd; 609 610 rd = rte_realloc_socket(ri->resubmit_list, sizeof(*rd) * ri->resubmit_num, 611 0, node); 612 if (!rd) { 613 VHOST_LOG_CONFIG(dev->ifname, ERR, 614 "failed to realloc resubmit list on node %d\n", 615 node); 616 return; 617 } 618 ri->resubmit_list = rd; 619 } 620 } 621 622 vq->numa_node = node; 623 624 out_dev_realloc: 625 626 if (dev->flags & VIRTIO_DEV_RUNNING) 627 return; 628 629 ret = get_mempolicy(&dev_node, NULL, 0, dev, MPOL_F_NODE | MPOL_F_ADDR); 630 if (ret) { 631 VHOST_LOG_CONFIG(dev->ifname, ERR, "unable to get numa information.\n"); 632 return; 633 } 634 635 if (dev_node == node) 636 return; 637 638 dev = rte_realloc_socket(*pdev, sizeof(**pdev), 0, node); 639 if (!dev) { 640 VHOST_LOG_CONFIG((*pdev)->ifname, ERR, "failed to realloc dev on node %d\n", node); 641 return; 642 } 643 *pdev = dev; 644 645 VHOST_LOG_CONFIG(dev->ifname, INFO, "reallocated device on node %d\n", node); 646 vhost_devices[dev->vid] = dev; 647 648 mem_size = sizeof(struct rte_vhost_memory) + 649 sizeof(struct rte_vhost_mem_region) * dev->mem->nregions; 650 mem = rte_realloc_socket(dev->mem, mem_size, 0, node); 651 if (!mem) { 652 VHOST_LOG_CONFIG(dev->ifname, ERR, 653 "failed to realloc mem table on node %d\n", 654 node); 655 return; 656 } 657 dev->mem = mem; 658 659 gp = rte_realloc_socket(dev->guest_pages, dev->max_guest_pages * sizeof(*gp), 660 RTE_CACHE_LINE_SIZE, node); 661 if (!gp) { 662 VHOST_LOG_CONFIG(dev->ifname, ERR, 663 "failed to realloc guest pages on node %d\n", 664 node); 665 return; 666 } 667 dev->guest_pages = gp; 668 669 vhost_user_iotlb_init(dev); 670 } 671 #else 672 static void 673 numa_realloc(struct virtio_net **pdev, struct vhost_virtqueue **pvq) 674 { 675 RTE_SET_USED(pdev); 676 RTE_SET_USED(pvq); 677 } 678 #endif 679 680 /* Converts QEMU virtual address to Vhost virtual address. */ 681 static uint64_t 682 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len) 683 { 684 struct rte_vhost_mem_region *r; 685 uint32_t i; 686 687 if (unlikely(!dev || !dev->mem)) 688 goto out_error; 689 690 /* Find the region where the address lives. */ 691 for (i = 0; i < dev->mem->nregions; i++) { 692 r = &dev->mem->regions[i]; 693 694 if (qva >= r->guest_user_addr && 695 qva < r->guest_user_addr + r->size) { 696 697 if (unlikely(*len > r->guest_user_addr + r->size - qva)) 698 *len = r->guest_user_addr + r->size - qva; 699 700 return qva - r->guest_user_addr + 701 r->host_user_addr; 702 } 703 } 704 out_error: 705 *len = 0; 706 707 return 0; 708 } 709 710 711 /* 712 * Converts ring address to Vhost virtual address. 713 * If IOMMU is enabled, the ring address is a guest IO virtual address, 714 * else it is a QEMU virtual address. 715 */ 716 static uint64_t 717 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, 718 uint64_t ra, uint64_t *size) 719 { 720 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) { 721 uint64_t vva; 722 723 vhost_user_iotlb_rd_lock(vq); 724 vva = vhost_iova_to_vva(dev, vq, ra, 725 size, VHOST_ACCESS_RW); 726 vhost_user_iotlb_rd_unlock(vq); 727 728 return vva; 729 } 730 731 return qva_to_vva(dev, ra, size); 732 } 733 734 static uint64_t 735 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq) 736 { 737 uint64_t log_gpa; 738 739 vhost_user_iotlb_rd_lock(vq); 740 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr); 741 vhost_user_iotlb_rd_unlock(vq); 742 743 return log_gpa; 744 } 745 746 static uint64_t 747 hua_to_alignment(struct rte_vhost_memory *mem, void *ptr) 748 { 749 struct rte_vhost_mem_region *r; 750 uint32_t i; 751 uintptr_t hua = (uintptr_t)ptr; 752 753 for (i = 0; i < mem->nregions; i++) { 754 r = &mem->regions[i]; 755 if (hua >= r->host_user_addr && 756 hua < r->host_user_addr + r->size) { 757 return get_blk_size(r->fd); 758 } 759 } 760 761 /* If region isn't found, don't align at all */ 762 return 1; 763 } 764 765 void 766 mem_set_dump(void *ptr, size_t size, bool enable, uint64_t pagesz) 767 { 768 #ifdef MADV_DONTDUMP 769 void *start = RTE_PTR_ALIGN_FLOOR(ptr, pagesz); 770 uintptr_t end = RTE_ALIGN_CEIL((uintptr_t)ptr + size, pagesz); 771 size_t len = end - (uintptr_t)start; 772 773 if (madvise(start, len, enable ? MADV_DODUMP : MADV_DONTDUMP) == -1) { 774 rte_log(RTE_LOG_INFO, vhost_config_log_level, 775 "VHOST_CONFIG: could not set coredump preference (%s).\n", strerror(errno)); 776 } 777 #endif 778 } 779 780 static void 781 translate_ring_addresses(struct virtio_net **pdev, struct vhost_virtqueue **pvq) 782 { 783 struct vhost_virtqueue *vq; 784 struct virtio_net *dev; 785 uint64_t len, expected_len; 786 787 dev = *pdev; 788 vq = *pvq; 789 790 if (vq->ring_addrs.flags & (1 << VHOST_VRING_F_LOG)) { 791 vq->log_guest_addr = 792 log_addr_to_gpa(dev, vq); 793 if (vq->log_guest_addr == 0) { 794 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map log_guest_addr.\n"); 795 return; 796 } 797 } 798 799 if (vq_is_packed(dev)) { 800 len = sizeof(struct vring_packed_desc) * vq->size; 801 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t) 802 ring_addr_to_vva(dev, vq, vq->ring_addrs.desc_user_addr, &len); 803 if (vq->desc_packed == NULL || 804 len != sizeof(struct vring_packed_desc) * 805 vq->size) { 806 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map desc_packed ring.\n"); 807 return; 808 } 809 810 mem_set_dump(vq->desc_packed, len, true, 811 hua_to_alignment(dev->mem, vq->desc_packed)); 812 numa_realloc(&dev, &vq); 813 *pdev = dev; 814 *pvq = vq; 815 816 len = sizeof(struct vring_packed_desc_event); 817 vq->driver_event = (struct vring_packed_desc_event *) 818 (uintptr_t)ring_addr_to_vva(dev, 819 vq, vq->ring_addrs.avail_user_addr, &len); 820 if (vq->driver_event == NULL || 821 len != sizeof(struct vring_packed_desc_event)) { 822 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 823 "failed to find driver area address.\n"); 824 return; 825 } 826 827 mem_set_dump(vq->driver_event, len, true, 828 hua_to_alignment(dev->mem, vq->driver_event)); 829 len = sizeof(struct vring_packed_desc_event); 830 vq->device_event = (struct vring_packed_desc_event *) 831 (uintptr_t)ring_addr_to_vva(dev, 832 vq, vq->ring_addrs.used_user_addr, &len); 833 if (vq->device_event == NULL || 834 len != sizeof(struct vring_packed_desc_event)) { 835 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 836 "failed to find device area address.\n"); 837 return; 838 } 839 840 mem_set_dump(vq->device_event, len, true, 841 hua_to_alignment(dev->mem, vq->device_event)); 842 vq->access_ok = true; 843 return; 844 } 845 846 /* The addresses are converted from QEMU virtual to Vhost virtual. */ 847 if (vq->desc && vq->avail && vq->used) 848 return; 849 850 len = sizeof(struct vring_desc) * vq->size; 851 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev, 852 vq, vq->ring_addrs.desc_user_addr, &len); 853 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) { 854 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map desc ring.\n"); 855 return; 856 } 857 858 mem_set_dump(vq->desc, len, true, hua_to_alignment(dev->mem, vq->desc)); 859 numa_realloc(&dev, &vq); 860 *pdev = dev; 861 *pvq = vq; 862 863 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size; 864 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) 865 len += sizeof(uint16_t); 866 expected_len = len; 867 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev, 868 vq, vq->ring_addrs.avail_user_addr, &len); 869 if (vq->avail == 0 || len != expected_len) { 870 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map avail ring.\n"); 871 return; 872 } 873 874 mem_set_dump(vq->avail, len, true, hua_to_alignment(dev->mem, vq->avail)); 875 len = sizeof(struct vring_used) + 876 sizeof(struct vring_used_elem) * vq->size; 877 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) 878 len += sizeof(uint16_t); 879 expected_len = len; 880 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev, 881 vq, vq->ring_addrs.used_user_addr, &len); 882 if (vq->used == 0 || len != expected_len) { 883 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "failed to map used ring.\n"); 884 return; 885 } 886 887 mem_set_dump(vq->used, len, true, hua_to_alignment(dev->mem, vq->used)); 888 889 if (vq->last_used_idx != vq->used->idx) { 890 VHOST_LOG_CONFIG(dev->ifname, WARNING, 891 "last_used_idx (%u) and vq->used->idx (%u) mismatches;\n", 892 vq->last_used_idx, vq->used->idx); 893 vq->last_used_idx = vq->used->idx; 894 vq->last_avail_idx = vq->used->idx; 895 VHOST_LOG_CONFIG(dev->ifname, WARNING, 896 "some packets maybe resent for Tx and dropped for Rx\n"); 897 } 898 899 vq->access_ok = true; 900 901 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mapped address desc: %p\n", vq->desc); 902 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mapped address avail: %p\n", vq->avail); 903 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "mapped address used: %p\n", vq->used); 904 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "log_guest_addr: %" PRIx64 "\n", vq->log_guest_addr); 905 } 906 907 /* 908 * The virtio device sends us the desc, used and avail ring addresses. 909 * This function then converts these to our address space. 910 */ 911 static int 912 vhost_user_set_vring_addr(struct virtio_net **pdev, 913 struct vhu_msg_context *ctx, 914 int main_fd __rte_unused) 915 { 916 struct virtio_net *dev = *pdev; 917 struct vhost_virtqueue *vq; 918 struct vhost_vring_addr *addr = &ctx->msg.payload.addr; 919 bool access_ok; 920 921 if (dev->mem == NULL) 922 return RTE_VHOST_MSG_RESULT_ERR; 923 924 /* addr->index refers to the queue index. The txq 1, rxq is 0. */ 925 vq = dev->virtqueue[ctx->msg.payload.addr.index]; 926 927 access_ok = vq->access_ok; 928 929 /* 930 * Rings addresses should not be interpreted as long as the ring is not 931 * started and enabled 932 */ 933 memcpy(&vq->ring_addrs, addr, sizeof(*addr)); 934 935 vring_invalidate(dev, vq); 936 937 if ((vq->enabled && (dev->features & 938 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) || 939 access_ok) { 940 translate_ring_addresses(&dev, &vq); 941 *pdev = dev; 942 } 943 944 return RTE_VHOST_MSG_RESULT_OK; 945 } 946 947 /* 948 * The virtio device sends us the available ring last used index. 949 */ 950 static int 951 vhost_user_set_vring_base(struct virtio_net **pdev, 952 struct vhu_msg_context *ctx, 953 int main_fd __rte_unused) 954 { 955 struct virtio_net *dev = *pdev; 956 struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; 957 uint64_t val = ctx->msg.payload.state.num; 958 959 if (vq_is_packed(dev)) { 960 /* 961 * Bit[0:14]: avail index 962 * Bit[15]: avail wrap counter 963 */ 964 vq->last_avail_idx = val & 0x7fff; 965 vq->avail_wrap_counter = !!(val & (0x1 << 15)); 966 /* 967 * Set used index to same value as available one, as 968 * their values should be the same since ring processing 969 * was stopped at get time. 970 */ 971 vq->last_used_idx = vq->last_avail_idx; 972 vq->used_wrap_counter = vq->avail_wrap_counter; 973 } else { 974 vq->last_used_idx = ctx->msg.payload.state.num; 975 vq->last_avail_idx = ctx->msg.payload.state.num; 976 } 977 978 VHOST_LOG_CONFIG(dev->ifname, INFO, 979 "vring base idx:%u last_used_idx:%u last_avail_idx:%u.\n", 980 ctx->msg.payload.state.index, vq->last_used_idx, vq->last_avail_idx); 981 982 return RTE_VHOST_MSG_RESULT_OK; 983 } 984 985 static int 986 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr, 987 uint64_t host_iova, uint64_t host_user_addr, uint64_t size) 988 { 989 struct guest_page *page, *last_page; 990 struct guest_page *old_pages; 991 992 if (dev->nr_guest_pages == dev->max_guest_pages) { 993 dev->max_guest_pages *= 2; 994 old_pages = dev->guest_pages; 995 dev->guest_pages = rte_realloc(dev->guest_pages, 996 dev->max_guest_pages * sizeof(*page), 997 RTE_CACHE_LINE_SIZE); 998 if (dev->guest_pages == NULL) { 999 VHOST_LOG_CONFIG(dev->ifname, ERR, "cannot realloc guest_pages\n"); 1000 rte_free(old_pages); 1001 return -1; 1002 } 1003 } 1004 1005 if (dev->nr_guest_pages > 0) { 1006 last_page = &dev->guest_pages[dev->nr_guest_pages - 1]; 1007 /* merge if the two pages are continuous */ 1008 if (host_iova == last_page->host_iova + last_page->size && 1009 guest_phys_addr == last_page->guest_phys_addr + last_page->size && 1010 host_user_addr == last_page->host_user_addr + last_page->size) { 1011 last_page->size += size; 1012 return 0; 1013 } 1014 } 1015 1016 page = &dev->guest_pages[dev->nr_guest_pages++]; 1017 page->guest_phys_addr = guest_phys_addr; 1018 page->host_iova = host_iova; 1019 page->host_user_addr = host_user_addr; 1020 page->size = size; 1021 1022 return 0; 1023 } 1024 1025 static int 1026 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg, 1027 uint64_t page_size) 1028 { 1029 uint64_t reg_size = reg->size; 1030 uint64_t host_user_addr = reg->host_user_addr; 1031 uint64_t guest_phys_addr = reg->guest_phys_addr; 1032 uint64_t host_iova; 1033 uint64_t size; 1034 1035 host_iova = rte_mem_virt2iova((void *)(uintptr_t)host_user_addr); 1036 size = page_size - (guest_phys_addr & (page_size - 1)); 1037 size = RTE_MIN(size, reg_size); 1038 1039 if (add_one_guest_page(dev, guest_phys_addr, host_iova, 1040 host_user_addr, size) < 0) 1041 return -1; 1042 1043 host_user_addr += size; 1044 guest_phys_addr += size; 1045 reg_size -= size; 1046 1047 while (reg_size > 0) { 1048 size = RTE_MIN(reg_size, page_size); 1049 host_iova = rte_mem_virt2iova((void *)(uintptr_t) 1050 host_user_addr); 1051 if (add_one_guest_page(dev, guest_phys_addr, host_iova, 1052 host_user_addr, size) < 0) 1053 return -1; 1054 1055 host_user_addr += size; 1056 guest_phys_addr += size; 1057 reg_size -= size; 1058 } 1059 1060 /* sort guest page array if over binary search threshold */ 1061 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) { 1062 qsort((void *)dev->guest_pages, dev->nr_guest_pages, 1063 sizeof(struct guest_page), guest_page_addrcmp); 1064 } 1065 1066 return 0; 1067 } 1068 1069 #ifdef RTE_LIBRTE_VHOST_DEBUG 1070 /* TODO: enable it only in debug mode? */ 1071 static void 1072 dump_guest_pages(struct virtio_net *dev) 1073 { 1074 uint32_t i; 1075 struct guest_page *page; 1076 1077 for (i = 0; i < dev->nr_guest_pages; i++) { 1078 page = &dev->guest_pages[i]; 1079 1080 VHOST_LOG_CONFIG(dev->ifname, INFO, "guest physical page region %u\n", i); 1081 VHOST_LOG_CONFIG(dev->ifname, INFO, "\tguest_phys_addr: %" PRIx64 "\n", 1082 page->guest_phys_addr); 1083 VHOST_LOG_CONFIG(dev->ifname, INFO, "\thost_iova : %" PRIx64 "\n", 1084 page->host_iova); 1085 VHOST_LOG_CONFIG(dev->ifname, INFO, "\tsize : %" PRIx64 "\n", 1086 page->size); 1087 } 1088 } 1089 #else 1090 #define dump_guest_pages(dev) 1091 #endif 1092 1093 static bool 1094 vhost_memory_changed(struct VhostUserMemory *new, 1095 struct rte_vhost_memory *old) 1096 { 1097 uint32_t i; 1098 1099 if (new->nregions != old->nregions) 1100 return true; 1101 1102 for (i = 0; i < new->nregions; ++i) { 1103 VhostUserMemoryRegion *new_r = &new->regions[i]; 1104 struct rte_vhost_mem_region *old_r = &old->regions[i]; 1105 1106 if (new_r->guest_phys_addr != old_r->guest_phys_addr) 1107 return true; 1108 if (new_r->memory_size != old_r->size) 1109 return true; 1110 if (new_r->userspace_addr != old_r->guest_user_addr) 1111 return true; 1112 } 1113 1114 return false; 1115 } 1116 1117 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 1118 static int 1119 vhost_user_postcopy_region_register(struct virtio_net *dev, 1120 struct rte_vhost_mem_region *reg) 1121 { 1122 struct uffdio_register reg_struct; 1123 1124 /* 1125 * Let's register all the mmapped area to ensure 1126 * alignment on page boundary. 1127 */ 1128 reg_struct.range.start = (uint64_t)(uintptr_t)reg->mmap_addr; 1129 reg_struct.range.len = reg->mmap_size; 1130 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING; 1131 1132 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER, 1133 ®_struct)) { 1134 VHOST_LOG_CONFIG(dev->ifname, ERR, 1135 "failed to register ufd for region " 1136 "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n", 1137 (uint64_t)reg_struct.range.start, 1138 (uint64_t)reg_struct.range.start + 1139 (uint64_t)reg_struct.range.len - 1, 1140 dev->postcopy_ufd, 1141 strerror(errno)); 1142 return -1; 1143 } 1144 1145 VHOST_LOG_CONFIG(dev->ifname, INFO, 1146 "\t userfaultfd registered for range : %" PRIx64 " - %" PRIx64 "\n", 1147 (uint64_t)reg_struct.range.start, 1148 (uint64_t)reg_struct.range.start + 1149 (uint64_t)reg_struct.range.len - 1); 1150 1151 return 0; 1152 } 1153 #else 1154 static int 1155 vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused, 1156 struct rte_vhost_mem_region *reg __rte_unused) 1157 { 1158 return -1; 1159 } 1160 #endif 1161 1162 static int 1163 vhost_user_postcopy_register(struct virtio_net *dev, int main_fd, 1164 struct vhu_msg_context *ctx) 1165 { 1166 struct VhostUserMemory *memory; 1167 struct rte_vhost_mem_region *reg; 1168 struct vhu_msg_context ack_ctx; 1169 uint32_t i; 1170 1171 if (!dev->postcopy_listening) 1172 return 0; 1173 1174 /* 1175 * We haven't a better way right now than sharing 1176 * DPDK's virtual address with Qemu, so that Qemu can 1177 * retrieve the region offset when handling userfaults. 1178 */ 1179 memory = &ctx->msg.payload.memory; 1180 for (i = 0; i < memory->nregions; i++) { 1181 reg = &dev->mem->regions[i]; 1182 memory->regions[i].userspace_addr = reg->host_user_addr; 1183 } 1184 1185 /* Send the addresses back to qemu */ 1186 ctx->fd_num = 0; 1187 send_vhost_reply(dev, main_fd, ctx); 1188 1189 /* Wait for qemu to acknowledge it got the addresses 1190 * we've got to wait before we're allowed to generate faults. 1191 */ 1192 if (read_vhost_message(dev, main_fd, &ack_ctx) <= 0) { 1193 VHOST_LOG_CONFIG(dev->ifname, ERR, 1194 "failed to read qemu ack on postcopy set-mem-table\n"); 1195 return -1; 1196 } 1197 1198 if (validate_msg_fds(dev, &ack_ctx, 0) != 0) 1199 return -1; 1200 1201 if (ack_ctx.msg.request.frontend != VHOST_USER_SET_MEM_TABLE) { 1202 VHOST_LOG_CONFIG(dev->ifname, ERR, 1203 "bad qemu ack on postcopy set-mem-table (%d)\n", 1204 ack_ctx.msg.request.frontend); 1205 return -1; 1206 } 1207 1208 /* Now userfault register and we can use the memory */ 1209 for (i = 0; i < memory->nregions; i++) { 1210 reg = &dev->mem->regions[i]; 1211 if (vhost_user_postcopy_region_register(dev, reg) < 0) 1212 return -1; 1213 } 1214 1215 return 0; 1216 } 1217 1218 static int 1219 vhost_user_mmap_region(struct virtio_net *dev, 1220 struct rte_vhost_mem_region *region, 1221 uint64_t mmap_offset) 1222 { 1223 void *mmap_addr; 1224 uint64_t mmap_size; 1225 uint64_t alignment; 1226 int populate; 1227 1228 /* Check for memory_size + mmap_offset overflow */ 1229 if (mmap_offset >= -region->size) { 1230 VHOST_LOG_CONFIG(dev->ifname, ERR, 1231 "mmap_offset (%#"PRIx64") and memory_size (%#"PRIx64") overflow\n", 1232 mmap_offset, region->size); 1233 return -1; 1234 } 1235 1236 mmap_size = region->size + mmap_offset; 1237 1238 /* mmap() without flag of MAP_ANONYMOUS, should be called with length 1239 * argument aligned with hugepagesz at older longterm version Linux, 1240 * like 2.6.32 and 3.2.72, or mmap() will fail with EINVAL. 1241 * 1242 * To avoid failure, make sure in caller to keep length aligned. 1243 */ 1244 alignment = get_blk_size(region->fd); 1245 if (alignment == (uint64_t)-1) { 1246 VHOST_LOG_CONFIG(dev->ifname, ERR, "couldn't get hugepage size through fstat\n"); 1247 return -1; 1248 } 1249 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment); 1250 if (mmap_size == 0) { 1251 /* 1252 * It could happen if initial mmap_size + alignment overflows 1253 * the sizeof uint64, which could happen if either mmap_size or 1254 * alignment value is wrong. 1255 * 1256 * mmap() kernel implementation would return an error, but 1257 * better catch it before and provide useful info in the logs. 1258 */ 1259 VHOST_LOG_CONFIG(dev->ifname, ERR, 1260 "mmap size (0x%" PRIx64 ") or alignment (0x%" PRIx64 ") is invalid\n", 1261 region->size + mmap_offset, alignment); 1262 return -1; 1263 } 1264 1265 populate = dev->async_copy ? MAP_POPULATE : 0; 1266 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, 1267 MAP_SHARED | populate, region->fd, 0); 1268 1269 if (mmap_addr == MAP_FAILED) { 1270 VHOST_LOG_CONFIG(dev->ifname, ERR, "mmap failed (%s).\n", strerror(errno)); 1271 return -1; 1272 } 1273 1274 region->mmap_addr = mmap_addr; 1275 region->mmap_size = mmap_size; 1276 region->host_user_addr = (uint64_t)(uintptr_t)mmap_addr + mmap_offset; 1277 mem_set_dump(mmap_addr, mmap_size, false, alignment); 1278 1279 if (dev->async_copy) { 1280 if (add_guest_pages(dev, region, alignment) < 0) { 1281 VHOST_LOG_CONFIG(dev->ifname, ERR, 1282 "adding guest pages to region failed.\n"); 1283 return -1; 1284 } 1285 } 1286 1287 VHOST_LOG_CONFIG(dev->ifname, INFO, 1288 "guest memory region size: 0x%" PRIx64 "\n", 1289 region->size); 1290 VHOST_LOG_CONFIG(dev->ifname, INFO, 1291 "\t guest physical addr: 0x%" PRIx64 "\n", 1292 region->guest_phys_addr); 1293 VHOST_LOG_CONFIG(dev->ifname, INFO, 1294 "\t guest virtual addr: 0x%" PRIx64 "\n", 1295 region->guest_user_addr); 1296 VHOST_LOG_CONFIG(dev->ifname, INFO, 1297 "\t host virtual addr: 0x%" PRIx64 "\n", 1298 region->host_user_addr); 1299 VHOST_LOG_CONFIG(dev->ifname, INFO, 1300 "\t mmap addr : 0x%" PRIx64 "\n", 1301 (uint64_t)(uintptr_t)mmap_addr); 1302 VHOST_LOG_CONFIG(dev->ifname, INFO, 1303 "\t mmap size : 0x%" PRIx64 "\n", 1304 mmap_size); 1305 VHOST_LOG_CONFIG(dev->ifname, INFO, 1306 "\t mmap align: 0x%" PRIx64 "\n", 1307 alignment); 1308 VHOST_LOG_CONFIG(dev->ifname, INFO, 1309 "\t mmap off : 0x%" PRIx64 "\n", 1310 mmap_offset); 1311 1312 return 0; 1313 } 1314 1315 static int 1316 vhost_user_set_mem_table(struct virtio_net **pdev, 1317 struct vhu_msg_context *ctx, 1318 int main_fd) 1319 { 1320 struct virtio_net *dev = *pdev; 1321 struct VhostUserMemory *memory = &ctx->msg.payload.memory; 1322 struct rte_vhost_mem_region *reg; 1323 int numa_node = SOCKET_ID_ANY; 1324 uint64_t mmap_offset; 1325 uint32_t i; 1326 bool async_notify = false; 1327 1328 if (validate_msg_fds(dev, ctx, memory->nregions) != 0) 1329 return RTE_VHOST_MSG_RESULT_ERR; 1330 1331 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) { 1332 VHOST_LOG_CONFIG(dev->ifname, ERR, 1333 "too many memory regions (%u)\n", 1334 memory->nregions); 1335 goto close_msg_fds; 1336 } 1337 1338 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) { 1339 VHOST_LOG_CONFIG(dev->ifname, INFO, "memory regions not changed\n"); 1340 1341 close_msg_fds(ctx); 1342 1343 return RTE_VHOST_MSG_RESULT_OK; 1344 } 1345 1346 if (dev->mem) { 1347 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) { 1348 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 1349 1350 if (vdpa_dev && vdpa_dev->ops->dev_close) 1351 vdpa_dev->ops->dev_close(dev->vid); 1352 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; 1353 } 1354 1355 /* notify the vhost application to stop DMA transfers */ 1356 if (dev->async_copy && dev->notify_ops->vring_state_changed) { 1357 for (i = 0; i < dev->nr_vring; i++) { 1358 dev->notify_ops->vring_state_changed(dev->vid, 1359 i, 0); 1360 } 1361 async_notify = true; 1362 } 1363 1364 /* Flush IOTLB cache as previous HVAs are now invalid */ 1365 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 1366 vhost_user_iotlb_flush_all(dev); 1367 1368 free_mem_region(dev); 1369 rte_free(dev->mem); 1370 dev->mem = NULL; 1371 } 1372 1373 /* 1374 * If VQ 0 has already been allocated, try to allocate on the same 1375 * NUMA node. It can be reallocated later in numa_realloc(). 1376 */ 1377 if (dev->nr_vring > 0) 1378 numa_node = dev->virtqueue[0]->numa_node; 1379 1380 dev->nr_guest_pages = 0; 1381 if (dev->guest_pages == NULL) { 1382 dev->max_guest_pages = 8; 1383 dev->guest_pages = rte_zmalloc_socket(NULL, 1384 dev->max_guest_pages * 1385 sizeof(struct guest_page), 1386 RTE_CACHE_LINE_SIZE, 1387 numa_node); 1388 if (dev->guest_pages == NULL) { 1389 VHOST_LOG_CONFIG(dev->ifname, ERR, 1390 "failed to allocate memory for dev->guest_pages\n"); 1391 goto close_msg_fds; 1392 } 1393 } 1394 1395 dev->mem = rte_zmalloc_socket("vhost-mem-table", sizeof(struct rte_vhost_memory) + 1396 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0, numa_node); 1397 if (dev->mem == NULL) { 1398 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to allocate memory for dev->mem\n"); 1399 goto free_guest_pages; 1400 } 1401 1402 for (i = 0; i < memory->nregions; i++) { 1403 reg = &dev->mem->regions[i]; 1404 1405 reg->guest_phys_addr = memory->regions[i].guest_phys_addr; 1406 reg->guest_user_addr = memory->regions[i].userspace_addr; 1407 reg->size = memory->regions[i].memory_size; 1408 reg->fd = ctx->fds[i]; 1409 1410 /* 1411 * Assign invalid file descriptor value to avoid double 1412 * closing on error path. 1413 */ 1414 ctx->fds[i] = -1; 1415 1416 mmap_offset = memory->regions[i].mmap_offset; 1417 1418 if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) { 1419 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to mmap region %u\n", i); 1420 goto free_mem_table; 1421 } 1422 1423 dev->mem->nregions++; 1424 } 1425 1426 if (dev->async_copy && rte_vfio_is_enabled("vfio")) 1427 async_dma_map(dev, true); 1428 1429 if (vhost_user_postcopy_register(dev, main_fd, ctx) < 0) 1430 goto free_mem_table; 1431 1432 for (i = 0; i < dev->nr_vring; i++) { 1433 struct vhost_virtqueue *vq = dev->virtqueue[i]; 1434 1435 if (!vq) 1436 continue; 1437 1438 if (vq->desc || vq->avail || vq->used) { 1439 /* 1440 * If the memory table got updated, the ring addresses 1441 * need to be translated again as virtual addresses have 1442 * changed. 1443 */ 1444 vring_invalidate(dev, vq); 1445 1446 translate_ring_addresses(&dev, &vq); 1447 *pdev = dev; 1448 } 1449 } 1450 1451 dump_guest_pages(dev); 1452 1453 if (async_notify) { 1454 for (i = 0; i < dev->nr_vring; i++) 1455 dev->notify_ops->vring_state_changed(dev->vid, i, 1); 1456 } 1457 1458 return RTE_VHOST_MSG_RESULT_OK; 1459 1460 free_mem_table: 1461 free_mem_region(dev); 1462 rte_free(dev->mem); 1463 dev->mem = NULL; 1464 1465 free_guest_pages: 1466 rte_free(dev->guest_pages); 1467 dev->guest_pages = NULL; 1468 close_msg_fds: 1469 close_msg_fds(ctx); 1470 return RTE_VHOST_MSG_RESULT_ERR; 1471 } 1472 1473 static bool 1474 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq) 1475 { 1476 bool rings_ok; 1477 1478 if (!vq) 1479 return false; 1480 1481 if (vq_is_packed(dev)) 1482 rings_ok = vq->desc_packed && vq->driver_event && 1483 vq->device_event; 1484 else 1485 rings_ok = vq->desc && vq->avail && vq->used; 1486 1487 return rings_ok && 1488 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD && 1489 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD && 1490 vq->enabled; 1491 } 1492 1493 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u 1494 #define VIRTIO_BLK_NUM_VQS_TO_BE_READY 1u 1495 1496 static int 1497 virtio_is_ready(struct virtio_net *dev) 1498 { 1499 struct rte_vdpa_device *vdpa_dev; 1500 struct vhost_virtqueue *vq; 1501 uint32_t vdpa_type; 1502 uint32_t i, nr_vring = dev->nr_vring; 1503 1504 if (dev->flags & VIRTIO_DEV_READY) 1505 return 1; 1506 1507 if (!dev->nr_vring) 1508 return 0; 1509 1510 vdpa_dev = dev->vdpa_dev; 1511 if (vdpa_dev) 1512 vdpa_type = vdpa_dev->type; 1513 else 1514 vdpa_type = -1; 1515 1516 if (vdpa_type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK) { 1517 nr_vring = VIRTIO_BLK_NUM_VQS_TO_BE_READY; 1518 } else { 1519 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) 1520 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY; 1521 } 1522 1523 if (dev->nr_vring < nr_vring) 1524 return 0; 1525 1526 for (i = 0; i < nr_vring; i++) { 1527 vq = dev->virtqueue[i]; 1528 1529 if (!vq_is_ready(dev, vq)) 1530 return 0; 1531 } 1532 1533 /* If supported, ensure the frontend is really done with config */ 1534 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS)) 1535 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)) 1536 return 0; 1537 1538 dev->flags |= VIRTIO_DEV_READY; 1539 1540 if (!(dev->flags & VIRTIO_DEV_RUNNING)) 1541 VHOST_LOG_CONFIG(dev->ifname, INFO, "virtio is now ready for processing.\n"); 1542 return 1; 1543 } 1544 1545 static void * 1546 inflight_mem_alloc(struct virtio_net *dev, const char *name, size_t size, int *fd) 1547 { 1548 void *ptr; 1549 int mfd = -1; 1550 uint64_t alignment; 1551 char fname[20] = "/tmp/memfd-XXXXXX"; 1552 1553 *fd = -1; 1554 #ifdef MEMFD_SUPPORTED 1555 mfd = memfd_create(name, MFD_CLOEXEC); 1556 #else 1557 RTE_SET_USED(name); 1558 #endif 1559 if (mfd == -1) { 1560 mfd = mkstemp(fname); 1561 if (mfd == -1) { 1562 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to get inflight buffer fd\n"); 1563 return NULL; 1564 } 1565 1566 unlink(fname); 1567 } 1568 1569 if (ftruncate(mfd, size) == -1) { 1570 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc inflight buffer\n"); 1571 close(mfd); 1572 return NULL; 1573 } 1574 1575 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0); 1576 if (ptr == MAP_FAILED) { 1577 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to mmap inflight buffer\n"); 1578 close(mfd); 1579 return NULL; 1580 } 1581 1582 alignment = get_blk_size(mfd); 1583 mem_set_dump(ptr, size, false, alignment); 1584 *fd = mfd; 1585 return ptr; 1586 } 1587 1588 static uint32_t 1589 get_pervq_shm_size_split(uint16_t queue_size) 1590 { 1591 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) * 1592 queue_size + sizeof(uint64_t) + 1593 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT); 1594 } 1595 1596 static uint32_t 1597 get_pervq_shm_size_packed(uint16_t queue_size) 1598 { 1599 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed) 1600 * queue_size + sizeof(uint64_t) + 1601 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9, 1602 INFLIGHT_ALIGNMENT); 1603 } 1604 1605 static int 1606 vhost_user_get_inflight_fd(struct virtio_net **pdev, 1607 struct vhu_msg_context *ctx, 1608 int main_fd __rte_unused) 1609 { 1610 struct rte_vhost_inflight_info_packed *inflight_packed; 1611 uint64_t pervq_inflight_size, mmap_size; 1612 uint16_t num_queues, queue_size; 1613 struct virtio_net *dev = *pdev; 1614 int fd, i, j; 1615 int numa_node = SOCKET_ID_ANY; 1616 void *addr; 1617 1618 if (ctx->msg.size != sizeof(ctx->msg.payload.inflight)) { 1619 VHOST_LOG_CONFIG(dev->ifname, ERR, 1620 "invalid get_inflight_fd message size is %d\n", 1621 ctx->msg.size); 1622 return RTE_VHOST_MSG_RESULT_ERR; 1623 } 1624 1625 /* 1626 * If VQ 0 has already been allocated, try to allocate on the same 1627 * NUMA node. It can be reallocated later in numa_realloc(). 1628 */ 1629 if (dev->nr_vring > 0) 1630 numa_node = dev->virtqueue[0]->numa_node; 1631 1632 if (dev->inflight_info == NULL) { 1633 dev->inflight_info = rte_zmalloc_socket("inflight_info", 1634 sizeof(struct inflight_mem_info), 0, numa_node); 1635 if (!dev->inflight_info) { 1636 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc dev inflight area\n"); 1637 return RTE_VHOST_MSG_RESULT_ERR; 1638 } 1639 dev->inflight_info->fd = -1; 1640 } 1641 1642 num_queues = ctx->msg.payload.inflight.num_queues; 1643 queue_size = ctx->msg.payload.inflight.queue_size; 1644 1645 VHOST_LOG_CONFIG(dev->ifname, INFO, 1646 "get_inflight_fd num_queues: %u\n", 1647 ctx->msg.payload.inflight.num_queues); 1648 VHOST_LOG_CONFIG(dev->ifname, INFO, 1649 "get_inflight_fd queue_size: %u\n", 1650 ctx->msg.payload.inflight.queue_size); 1651 1652 if (vq_is_packed(dev)) 1653 pervq_inflight_size = get_pervq_shm_size_packed(queue_size); 1654 else 1655 pervq_inflight_size = get_pervq_shm_size_split(queue_size); 1656 1657 mmap_size = num_queues * pervq_inflight_size; 1658 addr = inflight_mem_alloc(dev, "vhost-inflight", mmap_size, &fd); 1659 if (!addr) { 1660 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc vhost inflight area\n"); 1661 ctx->msg.payload.inflight.mmap_size = 0; 1662 return RTE_VHOST_MSG_RESULT_ERR; 1663 } 1664 memset(addr, 0, mmap_size); 1665 1666 if (dev->inflight_info->addr) { 1667 munmap(dev->inflight_info->addr, dev->inflight_info->size); 1668 dev->inflight_info->addr = NULL; 1669 } 1670 1671 if (dev->inflight_info->fd >= 0) { 1672 close(dev->inflight_info->fd); 1673 dev->inflight_info->fd = -1; 1674 } 1675 1676 dev->inflight_info->addr = addr; 1677 dev->inflight_info->size = ctx->msg.payload.inflight.mmap_size = mmap_size; 1678 dev->inflight_info->fd = ctx->fds[0] = fd; 1679 ctx->msg.payload.inflight.mmap_offset = 0; 1680 ctx->fd_num = 1; 1681 1682 if (vq_is_packed(dev)) { 1683 for (i = 0; i < num_queues; i++) { 1684 inflight_packed = 1685 (struct rte_vhost_inflight_info_packed *)addr; 1686 inflight_packed->used_wrap_counter = 1; 1687 inflight_packed->old_used_wrap_counter = 1; 1688 for (j = 0; j < queue_size; j++) 1689 inflight_packed->desc[j].next = j + 1; 1690 addr = (void *)((char *)addr + pervq_inflight_size); 1691 } 1692 } 1693 1694 VHOST_LOG_CONFIG(dev->ifname, INFO, 1695 "send inflight mmap_size: %"PRIu64"\n", 1696 ctx->msg.payload.inflight.mmap_size); 1697 VHOST_LOG_CONFIG(dev->ifname, INFO, 1698 "send inflight mmap_offset: %"PRIu64"\n", 1699 ctx->msg.payload.inflight.mmap_offset); 1700 VHOST_LOG_CONFIG(dev->ifname, INFO, 1701 "send inflight fd: %d\n", ctx->fds[0]); 1702 1703 return RTE_VHOST_MSG_RESULT_REPLY; 1704 } 1705 1706 static int 1707 vhost_user_set_inflight_fd(struct virtio_net **pdev, 1708 struct vhu_msg_context *ctx, 1709 int main_fd __rte_unused) 1710 { 1711 uint64_t mmap_size, mmap_offset; 1712 uint16_t num_queues, queue_size; 1713 struct virtio_net *dev = *pdev; 1714 uint32_t pervq_inflight_size; 1715 struct vhost_virtqueue *vq; 1716 void *addr; 1717 int fd, i; 1718 int numa_node = SOCKET_ID_ANY; 1719 1720 if (validate_msg_fds(dev, ctx, 1) != 0) 1721 return RTE_VHOST_MSG_RESULT_ERR; 1722 1723 fd = ctx->fds[0]; 1724 if (ctx->msg.size != sizeof(ctx->msg.payload.inflight) || fd < 0) { 1725 VHOST_LOG_CONFIG(dev->ifname, ERR, 1726 "invalid set_inflight_fd message size is %d,fd is %d\n", 1727 ctx->msg.size, fd); 1728 return RTE_VHOST_MSG_RESULT_ERR; 1729 } 1730 1731 mmap_size = ctx->msg.payload.inflight.mmap_size; 1732 mmap_offset = ctx->msg.payload.inflight.mmap_offset; 1733 num_queues = ctx->msg.payload.inflight.num_queues; 1734 queue_size = ctx->msg.payload.inflight.queue_size; 1735 1736 if (vq_is_packed(dev)) 1737 pervq_inflight_size = get_pervq_shm_size_packed(queue_size); 1738 else 1739 pervq_inflight_size = get_pervq_shm_size_split(queue_size); 1740 1741 VHOST_LOG_CONFIG(dev->ifname, INFO, "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size); 1742 VHOST_LOG_CONFIG(dev->ifname, INFO, 1743 "set_inflight_fd mmap_offset: %"PRIu64"\n", 1744 mmap_offset); 1745 VHOST_LOG_CONFIG(dev->ifname, INFO, 1746 "set_inflight_fd num_queues: %u\n", 1747 num_queues); 1748 VHOST_LOG_CONFIG(dev->ifname, INFO, 1749 "set_inflight_fd queue_size: %u\n", 1750 queue_size); 1751 VHOST_LOG_CONFIG(dev->ifname, INFO, 1752 "set_inflight_fd fd: %d\n", 1753 fd); 1754 VHOST_LOG_CONFIG(dev->ifname, INFO, 1755 "set_inflight_fd pervq_inflight_size: %d\n", 1756 pervq_inflight_size); 1757 1758 /* 1759 * If VQ 0 has already been allocated, try to allocate on the same 1760 * NUMA node. It can be reallocated later in numa_realloc(). 1761 */ 1762 if (dev->nr_vring > 0) 1763 numa_node = dev->virtqueue[0]->numa_node; 1764 1765 if (!dev->inflight_info) { 1766 dev->inflight_info = rte_zmalloc_socket("inflight_info", 1767 sizeof(struct inflight_mem_info), 0, numa_node); 1768 if (dev->inflight_info == NULL) { 1769 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc dev inflight area\n"); 1770 return RTE_VHOST_MSG_RESULT_ERR; 1771 } 1772 dev->inflight_info->fd = -1; 1773 } 1774 1775 if (dev->inflight_info->addr) { 1776 munmap(dev->inflight_info->addr, dev->inflight_info->size); 1777 dev->inflight_info->addr = NULL; 1778 } 1779 1780 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, 1781 fd, mmap_offset); 1782 if (addr == MAP_FAILED) { 1783 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to mmap share memory.\n"); 1784 return RTE_VHOST_MSG_RESULT_ERR; 1785 } 1786 1787 if (dev->inflight_info->fd >= 0) { 1788 close(dev->inflight_info->fd); 1789 dev->inflight_info->fd = -1; 1790 } 1791 1792 mem_set_dump(addr, mmap_size, false, get_blk_size(fd)); 1793 dev->inflight_info->fd = fd; 1794 dev->inflight_info->addr = addr; 1795 dev->inflight_info->size = mmap_size; 1796 1797 for (i = 0; i < num_queues; i++) { 1798 vq = dev->virtqueue[i]; 1799 if (!vq) 1800 continue; 1801 1802 if (vq_is_packed(dev)) { 1803 vq->inflight_packed = addr; 1804 vq->inflight_packed->desc_num = queue_size; 1805 } else { 1806 vq->inflight_split = addr; 1807 vq->inflight_split->desc_num = queue_size; 1808 } 1809 addr = (void *)((char *)addr + pervq_inflight_size); 1810 } 1811 1812 return RTE_VHOST_MSG_RESULT_OK; 1813 } 1814 1815 static int 1816 vhost_user_set_vring_call(struct virtio_net **pdev, 1817 struct vhu_msg_context *ctx, 1818 int main_fd __rte_unused) 1819 { 1820 struct virtio_net *dev = *pdev; 1821 struct vhost_vring_file file; 1822 struct vhost_virtqueue *vq; 1823 int expected_fds; 1824 1825 expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1826 if (validate_msg_fds(dev, ctx, expected_fds) != 0) 1827 return RTE_VHOST_MSG_RESULT_ERR; 1828 1829 file.index = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 1830 if (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) 1831 file.fd = VIRTIO_INVALID_EVENTFD; 1832 else 1833 file.fd = ctx->fds[0]; 1834 VHOST_LOG_CONFIG(dev->ifname, INFO, 1835 "vring call idx:%d file:%d\n", 1836 file.index, file.fd); 1837 1838 vq = dev->virtqueue[file.index]; 1839 1840 if (vq->ready) { 1841 vq->ready = false; 1842 vhost_user_notify_queue_state(dev, vq, 0); 1843 } 1844 1845 if (vq->callfd >= 0) 1846 close(vq->callfd); 1847 1848 vq->callfd = file.fd; 1849 1850 return RTE_VHOST_MSG_RESULT_OK; 1851 } 1852 1853 static int vhost_user_set_vring_err(struct virtio_net **pdev, 1854 struct vhu_msg_context *ctx, 1855 int main_fd __rte_unused) 1856 { 1857 struct virtio_net *dev = *pdev; 1858 int expected_fds; 1859 1860 expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1861 if (validate_msg_fds(dev, ctx, expected_fds) != 0) 1862 return RTE_VHOST_MSG_RESULT_ERR; 1863 1864 if (!(ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK)) 1865 close(ctx->fds[0]); 1866 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "not implemented\n"); 1867 1868 return RTE_VHOST_MSG_RESULT_OK; 1869 } 1870 1871 static int 1872 resubmit_desc_compare(const void *a, const void *b) 1873 { 1874 const struct rte_vhost_resubmit_desc *desc0 = a; 1875 const struct rte_vhost_resubmit_desc *desc1 = b; 1876 1877 if (desc1->counter > desc0->counter) 1878 return 1; 1879 1880 return -1; 1881 } 1882 1883 static int 1884 vhost_check_queue_inflights_split(struct virtio_net *dev, 1885 struct vhost_virtqueue *vq) 1886 { 1887 uint16_t i; 1888 uint16_t resubmit_num = 0, last_io, num; 1889 struct vring_used *used = vq->used; 1890 struct rte_vhost_resubmit_info *resubmit; 1891 struct rte_vhost_inflight_info_split *inflight_split; 1892 1893 if (!(dev->protocol_features & 1894 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) 1895 return RTE_VHOST_MSG_RESULT_OK; 1896 1897 /* The frontend may still not support the inflight feature 1898 * although we negotiate the protocol feature. 1899 */ 1900 if ((!vq->inflight_split)) 1901 return RTE_VHOST_MSG_RESULT_OK; 1902 1903 if (!vq->inflight_split->version) { 1904 vq->inflight_split->version = INFLIGHT_VERSION; 1905 return RTE_VHOST_MSG_RESULT_OK; 1906 } 1907 1908 if (vq->resubmit_inflight) 1909 return RTE_VHOST_MSG_RESULT_OK; 1910 1911 inflight_split = vq->inflight_split; 1912 vq->global_counter = 0; 1913 last_io = inflight_split->last_inflight_io; 1914 1915 if (inflight_split->used_idx != used->idx) { 1916 inflight_split->desc[last_io].inflight = 0; 1917 rte_atomic_thread_fence(rte_memory_order_seq_cst); 1918 inflight_split->used_idx = used->idx; 1919 } 1920 1921 for (i = 0; i < inflight_split->desc_num; i++) { 1922 if (inflight_split->desc[i].inflight == 1) 1923 resubmit_num++; 1924 } 1925 1926 vq->last_avail_idx += resubmit_num; 1927 1928 if (resubmit_num) { 1929 resubmit = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 1930 0, vq->numa_node); 1931 if (!resubmit) { 1932 VHOST_LOG_CONFIG(dev->ifname, ERR, 1933 "failed to allocate memory for resubmit info.\n"); 1934 return RTE_VHOST_MSG_RESULT_ERR; 1935 } 1936 1937 resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", 1938 resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 1939 0, vq->numa_node); 1940 if (!resubmit->resubmit_list) { 1941 VHOST_LOG_CONFIG(dev->ifname, ERR, 1942 "failed to allocate memory for inflight desc.\n"); 1943 rte_free(resubmit); 1944 return RTE_VHOST_MSG_RESULT_ERR; 1945 } 1946 1947 num = 0; 1948 for (i = 0; i < vq->inflight_split->desc_num; i++) { 1949 if (vq->inflight_split->desc[i].inflight == 1) { 1950 resubmit->resubmit_list[num].index = i; 1951 resubmit->resubmit_list[num].counter = 1952 inflight_split->desc[i].counter; 1953 num++; 1954 } 1955 } 1956 resubmit->resubmit_num = num; 1957 1958 if (resubmit->resubmit_num > 1) 1959 qsort(resubmit->resubmit_list, resubmit->resubmit_num, 1960 sizeof(struct rte_vhost_resubmit_desc), 1961 resubmit_desc_compare); 1962 1963 vq->global_counter = resubmit->resubmit_list[0].counter + 1; 1964 vq->resubmit_inflight = resubmit; 1965 } 1966 1967 return RTE_VHOST_MSG_RESULT_OK; 1968 } 1969 1970 static int 1971 vhost_check_queue_inflights_packed(struct virtio_net *dev, 1972 struct vhost_virtqueue *vq) 1973 { 1974 uint16_t i; 1975 uint16_t resubmit_num = 0, old_used_idx, num; 1976 struct rte_vhost_resubmit_info *resubmit; 1977 struct rte_vhost_inflight_info_packed *inflight_packed; 1978 1979 if (!(dev->protocol_features & 1980 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) 1981 return RTE_VHOST_MSG_RESULT_OK; 1982 1983 /* The frontend may still not support the inflight feature 1984 * although we negotiate the protocol feature. 1985 */ 1986 if ((!vq->inflight_packed)) 1987 return RTE_VHOST_MSG_RESULT_OK; 1988 1989 if (!vq->inflight_packed->version) { 1990 vq->inflight_packed->version = INFLIGHT_VERSION; 1991 return RTE_VHOST_MSG_RESULT_OK; 1992 } 1993 1994 if (vq->resubmit_inflight) 1995 return RTE_VHOST_MSG_RESULT_OK; 1996 1997 inflight_packed = vq->inflight_packed; 1998 vq->global_counter = 0; 1999 old_used_idx = inflight_packed->old_used_idx; 2000 2001 if (inflight_packed->used_idx != old_used_idx) { 2002 if (inflight_packed->desc[old_used_idx].inflight == 0) { 2003 inflight_packed->old_used_idx = 2004 inflight_packed->used_idx; 2005 inflight_packed->old_used_wrap_counter = 2006 inflight_packed->used_wrap_counter; 2007 inflight_packed->old_free_head = 2008 inflight_packed->free_head; 2009 } else { 2010 inflight_packed->used_idx = 2011 inflight_packed->old_used_idx; 2012 inflight_packed->used_wrap_counter = 2013 inflight_packed->old_used_wrap_counter; 2014 inflight_packed->free_head = 2015 inflight_packed->old_free_head; 2016 } 2017 } 2018 2019 for (i = 0; i < inflight_packed->desc_num; i++) { 2020 if (inflight_packed->desc[i].inflight == 1) 2021 resubmit_num++; 2022 } 2023 2024 if (resubmit_num) { 2025 resubmit = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 2026 0, vq->numa_node); 2027 if (resubmit == NULL) { 2028 VHOST_LOG_CONFIG(dev->ifname, ERR, 2029 "failed to allocate memory for resubmit info.\n"); 2030 return RTE_VHOST_MSG_RESULT_ERR; 2031 } 2032 2033 resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", 2034 resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 2035 0, vq->numa_node); 2036 if (resubmit->resubmit_list == NULL) { 2037 VHOST_LOG_CONFIG(dev->ifname, ERR, 2038 "failed to allocate memory for resubmit desc.\n"); 2039 rte_free(resubmit); 2040 return RTE_VHOST_MSG_RESULT_ERR; 2041 } 2042 2043 num = 0; 2044 for (i = 0; i < inflight_packed->desc_num; i++) { 2045 if (vq->inflight_packed->desc[i].inflight == 1) { 2046 resubmit->resubmit_list[num].index = i; 2047 resubmit->resubmit_list[num].counter = 2048 inflight_packed->desc[i].counter; 2049 num++; 2050 } 2051 } 2052 resubmit->resubmit_num = num; 2053 2054 if (resubmit->resubmit_num > 1) 2055 qsort(resubmit->resubmit_list, resubmit->resubmit_num, 2056 sizeof(struct rte_vhost_resubmit_desc), 2057 resubmit_desc_compare); 2058 2059 vq->global_counter = resubmit->resubmit_list[0].counter + 1; 2060 vq->resubmit_inflight = resubmit; 2061 } 2062 2063 return RTE_VHOST_MSG_RESULT_OK; 2064 } 2065 2066 static int 2067 vhost_user_set_vring_kick(struct virtio_net **pdev, 2068 struct vhu_msg_context *ctx, 2069 int main_fd __rte_unused) 2070 { 2071 struct virtio_net *dev = *pdev; 2072 struct vhost_vring_file file; 2073 struct vhost_virtqueue *vq; 2074 int expected_fds; 2075 2076 expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 2077 if (validate_msg_fds(dev, ctx, expected_fds) != 0) 2078 return RTE_VHOST_MSG_RESULT_ERR; 2079 2080 file.index = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 2081 if (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) 2082 file.fd = VIRTIO_INVALID_EVENTFD; 2083 else 2084 file.fd = ctx->fds[0]; 2085 VHOST_LOG_CONFIG(dev->ifname, INFO, 2086 "vring kick idx:%d file:%d\n", 2087 file.index, file.fd); 2088 2089 /* Interpret ring addresses only when ring is started. */ 2090 vq = dev->virtqueue[file.index]; 2091 translate_ring_addresses(&dev, &vq); 2092 *pdev = dev; 2093 2094 /* 2095 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated, 2096 * the ring starts already enabled. Otherwise, it is enabled via 2097 * the SET_VRING_ENABLE message. 2098 */ 2099 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) { 2100 vq->enabled = true; 2101 } 2102 2103 if (vq->ready) { 2104 vq->ready = false; 2105 vhost_user_notify_queue_state(dev, vq, 0); 2106 } 2107 2108 if (vq->kickfd >= 0) 2109 close(vq->kickfd); 2110 vq->kickfd = file.fd; 2111 2112 if (vq_is_packed(dev)) { 2113 if (vhost_check_queue_inflights_packed(dev, vq)) { 2114 VHOST_LOG_CONFIG(dev->ifname, ERR, 2115 "failed to inflights for vq: %d\n", 2116 file.index); 2117 return RTE_VHOST_MSG_RESULT_ERR; 2118 } 2119 } else { 2120 if (vhost_check_queue_inflights_split(dev, vq)) { 2121 VHOST_LOG_CONFIG(dev->ifname, ERR, 2122 "failed to inflights for vq: %d\n", 2123 file.index); 2124 return RTE_VHOST_MSG_RESULT_ERR; 2125 } 2126 } 2127 2128 return RTE_VHOST_MSG_RESULT_OK; 2129 } 2130 2131 /* 2132 * when virtio is stopped, qemu will send us the GET_VRING_BASE message. 2133 */ 2134 static int 2135 vhost_user_get_vring_base(struct virtio_net **pdev, 2136 struct vhu_msg_context *ctx, 2137 int main_fd __rte_unused) 2138 { 2139 struct virtio_net *dev = *pdev; 2140 struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; 2141 uint64_t val; 2142 2143 /* We have to stop the queue (virtio) if it is running. */ 2144 vhost_destroy_device_notify(dev); 2145 2146 dev->flags &= ~VIRTIO_DEV_READY; 2147 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; 2148 2149 /* Here we are safe to get the indexes */ 2150 if (vq_is_packed(dev)) { 2151 /* 2152 * Bit[0:14]: avail index 2153 * Bit[15]: avail wrap counter 2154 */ 2155 val = vq->last_avail_idx & 0x7fff; 2156 val |= vq->avail_wrap_counter << 15; 2157 ctx->msg.payload.state.num = val; 2158 } else { 2159 ctx->msg.payload.state.num = vq->last_avail_idx; 2160 } 2161 2162 VHOST_LOG_CONFIG(dev->ifname, INFO, 2163 "vring base idx:%d file:%d\n", 2164 ctx->msg.payload.state.index, ctx->msg.payload.state.num); 2165 /* 2166 * Based on current qemu vhost-user implementation, this message is 2167 * sent and only sent in vhost_vring_stop. 2168 * TODO: cleanup the vring, it isn't usable since here. 2169 */ 2170 if (vq->kickfd >= 0) 2171 close(vq->kickfd); 2172 2173 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD; 2174 2175 if (vq->callfd >= 0) 2176 close(vq->callfd); 2177 2178 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD; 2179 2180 vq->signalled_used_valid = false; 2181 2182 if (vq_is_packed(dev)) { 2183 rte_free(vq->shadow_used_packed); 2184 vq->shadow_used_packed = NULL; 2185 } else { 2186 rte_free(vq->shadow_used_split); 2187 vq->shadow_used_split = NULL; 2188 } 2189 2190 rte_free(vq->batch_copy_elems); 2191 vq->batch_copy_elems = NULL; 2192 2193 rte_free(vq->log_cache); 2194 vq->log_cache = NULL; 2195 2196 ctx->msg.size = sizeof(ctx->msg.payload.state); 2197 ctx->fd_num = 0; 2198 2199 vhost_user_iotlb_flush_all(dev); 2200 2201 vring_invalidate(dev, vq); 2202 2203 return RTE_VHOST_MSG_RESULT_REPLY; 2204 } 2205 2206 /* 2207 * when virtio queues are ready to work, qemu will send us to 2208 * enable the virtio queue pair. 2209 */ 2210 static int 2211 vhost_user_set_vring_enable(struct virtio_net **pdev, 2212 struct vhu_msg_context *ctx, 2213 int main_fd __rte_unused) 2214 { 2215 struct virtio_net *dev = *pdev; 2216 struct vhost_virtqueue *vq; 2217 bool enable = !!ctx->msg.payload.state.num; 2218 int index = (int)ctx->msg.payload.state.index; 2219 2220 VHOST_LOG_CONFIG(dev->ifname, INFO, 2221 "set queue enable: %d to qp idx: %d\n", 2222 enable, index); 2223 2224 vq = dev->virtqueue[index]; 2225 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 2226 /* vhost_user_lock_all_queue_pairs locked all qps */ 2227 vq_assert_lock(dev, vq); 2228 if (enable && vq->async && vq->async->pkts_inflight_n) { 2229 VHOST_LOG_CONFIG(dev->ifname, ERR, 2230 "failed to enable vring. Inflight packets must be completed first\n"); 2231 return RTE_VHOST_MSG_RESULT_ERR; 2232 } 2233 } 2234 2235 vq->enabled = enable; 2236 2237 return RTE_VHOST_MSG_RESULT_OK; 2238 } 2239 2240 static int 2241 vhost_user_get_protocol_features(struct virtio_net **pdev, 2242 struct vhu_msg_context *ctx, 2243 int main_fd __rte_unused) 2244 { 2245 struct virtio_net *dev = *pdev; 2246 uint64_t features, protocol_features; 2247 2248 rte_vhost_driver_get_features(dev->ifname, &features); 2249 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features); 2250 2251 ctx->msg.payload.u64 = protocol_features; 2252 ctx->msg.size = sizeof(ctx->msg.payload.u64); 2253 ctx->fd_num = 0; 2254 2255 return RTE_VHOST_MSG_RESULT_REPLY; 2256 } 2257 2258 static int 2259 vhost_user_set_protocol_features(struct virtio_net **pdev, 2260 struct vhu_msg_context *ctx, 2261 int main_fd __rte_unused) 2262 { 2263 struct virtio_net *dev = *pdev; 2264 uint64_t protocol_features = ctx->msg.payload.u64; 2265 uint64_t backend_protocol_features = 0; 2266 2267 rte_vhost_driver_get_protocol_features(dev->ifname, 2268 &backend_protocol_features); 2269 if (protocol_features & ~backend_protocol_features) { 2270 VHOST_LOG_CONFIG(dev->ifname, ERR, "received invalid protocol features.\n"); 2271 return RTE_VHOST_MSG_RESULT_ERR; 2272 } 2273 2274 dev->protocol_features = protocol_features; 2275 VHOST_LOG_CONFIG(dev->ifname, INFO, 2276 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n", 2277 dev->protocol_features); 2278 2279 return RTE_VHOST_MSG_RESULT_OK; 2280 } 2281 2282 static int 2283 vhost_user_set_log_base(struct virtio_net **pdev, 2284 struct vhu_msg_context *ctx, 2285 int main_fd __rte_unused) 2286 { 2287 struct virtio_net *dev = *pdev; 2288 int fd = ctx->fds[0]; 2289 uint64_t size, off; 2290 uint64_t alignment; 2291 void *addr; 2292 uint32_t i; 2293 2294 if (validate_msg_fds(dev, ctx, 1) != 0) 2295 return RTE_VHOST_MSG_RESULT_ERR; 2296 2297 if (fd < 0) { 2298 VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid log fd: %d\n", fd); 2299 return RTE_VHOST_MSG_RESULT_ERR; 2300 } 2301 2302 if (ctx->msg.size != sizeof(VhostUserLog)) { 2303 VHOST_LOG_CONFIG(dev->ifname, ERR, 2304 "invalid log base msg size: %"PRId32" != %d\n", 2305 ctx->msg.size, (int)sizeof(VhostUserLog)); 2306 goto close_msg_fds; 2307 } 2308 2309 size = ctx->msg.payload.log.mmap_size; 2310 off = ctx->msg.payload.log.mmap_offset; 2311 2312 /* Check for mmap size and offset overflow. */ 2313 if (off >= -size) { 2314 VHOST_LOG_CONFIG(dev->ifname, ERR, 2315 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n", 2316 off, size); 2317 goto close_msg_fds; 2318 } 2319 2320 VHOST_LOG_CONFIG(dev->ifname, INFO, 2321 "log mmap size: %"PRId64", offset: %"PRId64"\n", 2322 size, off); 2323 2324 /* 2325 * mmap from 0 to workaround a hugepage mmap bug: mmap will 2326 * fail when offset is not page size aligned. 2327 */ 2328 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 2329 alignment = get_blk_size(fd); 2330 close(fd); 2331 if (addr == MAP_FAILED) { 2332 VHOST_LOG_CONFIG(dev->ifname, ERR, "mmap log base failed!\n"); 2333 return RTE_VHOST_MSG_RESULT_ERR; 2334 } 2335 2336 /* 2337 * Free previously mapped log memory on occasionally 2338 * multiple VHOST_USER_SET_LOG_BASE. 2339 */ 2340 if (dev->log_addr) { 2341 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size); 2342 } 2343 dev->log_addr = (uint64_t)(uintptr_t)addr; 2344 dev->log_base = dev->log_addr + off; 2345 dev->log_size = size; 2346 mem_set_dump(addr, size + off, false, alignment); 2347 2348 for (i = 0; i < dev->nr_vring; i++) { 2349 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2350 2351 rte_free(vq->log_cache); 2352 vq->log_cache = NULL; 2353 vq->log_cache_nb_elem = 0; 2354 vq->log_cache = rte_malloc_socket("vq log cache", 2355 sizeof(struct log_cache_entry) * VHOST_LOG_CACHE_NR, 2356 0, vq->numa_node); 2357 /* 2358 * If log cache alloc fail, don't fail migration, but no 2359 * caching will be done, which will impact performance 2360 */ 2361 if (!vq->log_cache) 2362 VHOST_LOG_CONFIG(dev->ifname, ERR, 2363 "failed to allocate VQ logging cache\n"); 2364 } 2365 2366 /* 2367 * The spec is not clear about it (yet), but QEMU doesn't expect 2368 * any payload in the reply. 2369 */ 2370 ctx->msg.size = 0; 2371 ctx->fd_num = 0; 2372 2373 return RTE_VHOST_MSG_RESULT_REPLY; 2374 2375 close_msg_fds: 2376 close_msg_fds(ctx); 2377 return RTE_VHOST_MSG_RESULT_ERR; 2378 } 2379 2380 static int vhost_user_set_log_fd(struct virtio_net **pdev, 2381 struct vhu_msg_context *ctx, 2382 int main_fd __rte_unused) 2383 { 2384 struct virtio_net *dev = *pdev; 2385 2386 if (validate_msg_fds(dev, ctx, 1) != 0) 2387 return RTE_VHOST_MSG_RESULT_ERR; 2388 2389 close(ctx->fds[0]); 2390 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "not implemented.\n"); 2391 2392 return RTE_VHOST_MSG_RESULT_OK; 2393 } 2394 2395 /* 2396 * An rarp packet is constructed and broadcasted to notify switches about 2397 * the new location of the migrated VM, so that packets from outside will 2398 * not be lost after migration. 2399 * 2400 * However, we don't actually "send" a rarp packet here, instead, we set 2401 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it. 2402 */ 2403 static int 2404 vhost_user_send_rarp(struct virtio_net **pdev, 2405 struct vhu_msg_context *ctx, 2406 int main_fd __rte_unused) 2407 { 2408 struct virtio_net *dev = *pdev; 2409 uint8_t *mac = (uint8_t *)&ctx->msg.payload.u64; 2410 struct rte_vdpa_device *vdpa_dev; 2411 2412 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 2413 "MAC: " RTE_ETHER_ADDR_PRT_FMT "\n", 2414 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 2415 memcpy(dev->mac.addr_bytes, mac, 6); 2416 2417 /* 2418 * Set the flag to inject a RARP broadcast packet at 2419 * rte_vhost_dequeue_burst(). 2420 * 2421 * rte_memory_order_release ordering is for making sure the mac is 2422 * copied before the flag is set. 2423 */ 2424 rte_atomic_store_explicit(&dev->broadcast_rarp, 1, rte_memory_order_release); 2425 vdpa_dev = dev->vdpa_dev; 2426 if (vdpa_dev && vdpa_dev->ops->migration_done) 2427 vdpa_dev->ops->migration_done(dev->vid); 2428 2429 return RTE_VHOST_MSG_RESULT_OK; 2430 } 2431 2432 static int 2433 vhost_user_net_set_mtu(struct virtio_net **pdev, 2434 struct vhu_msg_context *ctx, 2435 int main_fd __rte_unused) 2436 { 2437 struct virtio_net *dev = *pdev; 2438 2439 if (ctx->msg.payload.u64 < VIRTIO_MIN_MTU || 2440 ctx->msg.payload.u64 > VIRTIO_MAX_MTU) { 2441 VHOST_LOG_CONFIG(dev->ifname, ERR, 2442 "invalid MTU size (%"PRIu64")\n", 2443 ctx->msg.payload.u64); 2444 2445 return RTE_VHOST_MSG_RESULT_ERR; 2446 } 2447 2448 dev->mtu = ctx->msg.payload.u64; 2449 2450 return RTE_VHOST_MSG_RESULT_OK; 2451 } 2452 2453 static int 2454 vhost_user_set_req_fd(struct virtio_net **pdev, 2455 struct vhu_msg_context *ctx, 2456 int main_fd __rte_unused) 2457 { 2458 struct virtio_net *dev = *pdev; 2459 int fd = ctx->fds[0]; 2460 2461 if (validate_msg_fds(dev, ctx, 1) != 0) 2462 return RTE_VHOST_MSG_RESULT_ERR; 2463 2464 if (fd < 0) { 2465 VHOST_LOG_CONFIG(dev->ifname, ERR, 2466 "invalid file descriptor for backend channel (%d)\n", fd); 2467 return RTE_VHOST_MSG_RESULT_ERR; 2468 } 2469 2470 if (dev->backend_req_fd >= 0) 2471 close(dev->backend_req_fd); 2472 2473 dev->backend_req_fd = fd; 2474 2475 return RTE_VHOST_MSG_RESULT_OK; 2476 } 2477 2478 static int 2479 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) 2480 { 2481 struct vhost_vring_addr *ra; 2482 uint64_t start, end, len; 2483 2484 start = imsg->iova; 2485 end = start + imsg->size; 2486 2487 ra = &vq->ring_addrs; 2488 len = sizeof(struct vring_desc) * vq->size; 2489 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start) 2490 return 1; 2491 2492 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size; 2493 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start) 2494 return 1; 2495 2496 len = sizeof(struct vring_used) + 2497 sizeof(struct vring_used_elem) * vq->size; 2498 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start) 2499 return 1; 2500 2501 if (ra->flags & (1 << VHOST_VRING_F_LOG)) { 2502 len = sizeof(uint64_t); 2503 if (ra->log_guest_addr < end && 2504 (ra->log_guest_addr + len) > start) 2505 return 1; 2506 } 2507 2508 return 0; 2509 } 2510 2511 static int 2512 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) 2513 { 2514 struct vhost_vring_addr *ra; 2515 uint64_t start, end, len; 2516 2517 start = imsg->iova; 2518 end = start + imsg->size; 2519 2520 ra = &vq->ring_addrs; 2521 len = sizeof(struct vring_packed_desc) * vq->size; 2522 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start) 2523 return 1; 2524 2525 len = sizeof(struct vring_packed_desc_event); 2526 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start) 2527 return 1; 2528 2529 len = sizeof(struct vring_packed_desc_event); 2530 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start) 2531 return 1; 2532 2533 if (ra->flags & (1 << VHOST_VRING_F_LOG)) { 2534 len = sizeof(uint64_t); 2535 if (ra->log_guest_addr < end && 2536 (ra->log_guest_addr + len) > start) 2537 return 1; 2538 } 2539 2540 return 0; 2541 } 2542 2543 static int is_vring_iotlb(struct virtio_net *dev, 2544 struct vhost_virtqueue *vq, 2545 struct vhost_iotlb_msg *imsg) 2546 { 2547 if (vq_is_packed(dev)) 2548 return is_vring_iotlb_packed(vq, imsg); 2549 else 2550 return is_vring_iotlb_split(vq, imsg); 2551 } 2552 2553 static int 2554 vhost_user_get_config(struct virtio_net **pdev, 2555 struct vhu_msg_context *ctx, 2556 int main_fd __rte_unused) 2557 { 2558 struct virtio_net *dev = *pdev; 2559 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 2560 int ret = 0; 2561 2562 if (validate_msg_fds(dev, ctx, 0) != 0) 2563 return RTE_VHOST_MSG_RESULT_ERR; 2564 2565 if (!vdpa_dev) { 2566 VHOST_LOG_CONFIG(dev->ifname, ERR, "is not vDPA device!\n"); 2567 return RTE_VHOST_MSG_RESULT_ERR; 2568 } 2569 2570 if (vdpa_dev->ops->get_config) { 2571 ret = vdpa_dev->ops->get_config(dev->vid, 2572 ctx->msg.payload.cfg.region, 2573 ctx->msg.payload.cfg.size); 2574 if (ret != 0) { 2575 ctx->msg.size = 0; 2576 VHOST_LOG_CONFIG(dev->ifname, ERR, "get_config() return error!\n"); 2577 } 2578 } else { 2579 VHOST_LOG_CONFIG(dev->ifname, ERR, "get_config() not supported!\n"); 2580 } 2581 2582 return RTE_VHOST_MSG_RESULT_REPLY; 2583 } 2584 2585 static int 2586 vhost_user_set_config(struct virtio_net **pdev, 2587 struct vhu_msg_context *ctx, 2588 int main_fd __rte_unused) 2589 { 2590 struct virtio_net *dev = *pdev; 2591 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 2592 int ret = 0; 2593 2594 if (validate_msg_fds(dev, ctx, 0) != 0) 2595 return RTE_VHOST_MSG_RESULT_ERR; 2596 2597 if (ctx->msg.payload.cfg.size > VHOST_USER_MAX_CONFIG_SIZE) { 2598 VHOST_LOG_CONFIG(dev->ifname, ERR, 2599 "vhost_user_config size: %"PRIu32", should not be larger than %d\n", 2600 ctx->msg.payload.cfg.size, VHOST_USER_MAX_CONFIG_SIZE); 2601 goto out; 2602 } 2603 2604 if (!vdpa_dev) { 2605 VHOST_LOG_CONFIG(dev->ifname, ERR, "is not vDPA device!\n"); 2606 goto out; 2607 } 2608 2609 if (vdpa_dev->ops->set_config) { 2610 ret = vdpa_dev->ops->set_config(dev->vid, 2611 ctx->msg.payload.cfg.region, 2612 ctx->msg.payload.cfg.offset, 2613 ctx->msg.payload.cfg.size, 2614 ctx->msg.payload.cfg.flags); 2615 if (ret) 2616 VHOST_LOG_CONFIG(dev->ifname, ERR, "set_config() return error!\n"); 2617 } else { 2618 VHOST_LOG_CONFIG(dev->ifname, ERR, "set_config() not supported!\n"); 2619 } 2620 2621 return RTE_VHOST_MSG_RESULT_OK; 2622 2623 out: 2624 return RTE_VHOST_MSG_RESULT_ERR; 2625 } 2626 2627 static int 2628 vhost_user_iotlb_msg(struct virtio_net **pdev, 2629 struct vhu_msg_context *ctx, 2630 int main_fd __rte_unused) 2631 { 2632 struct virtio_net *dev = *pdev; 2633 struct vhost_iotlb_msg *imsg = &ctx->msg.payload.iotlb; 2634 uint16_t i; 2635 uint64_t vva, len, pg_sz; 2636 2637 switch (imsg->type) { 2638 case VHOST_IOTLB_UPDATE: 2639 len = imsg->size; 2640 vva = qva_to_vva(dev, imsg->uaddr, &len); 2641 if (!vva) 2642 return RTE_VHOST_MSG_RESULT_ERR; 2643 2644 pg_sz = hua_to_alignment(dev->mem, (void *)(uintptr_t)vva); 2645 2646 vhost_user_iotlb_cache_insert(dev, imsg->iova, vva, 0, len, pg_sz, imsg->perm); 2647 2648 for (i = 0; i < dev->nr_vring; i++) { 2649 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2650 2651 if (!vq) 2652 continue; 2653 2654 if (is_vring_iotlb(dev, vq, imsg)) { 2655 rte_rwlock_write_lock(&vq->access_lock); 2656 translate_ring_addresses(&dev, &vq); 2657 *pdev = dev; 2658 rte_rwlock_write_unlock(&vq->access_lock); 2659 } 2660 } 2661 break; 2662 case VHOST_IOTLB_INVALIDATE: 2663 vhost_user_iotlb_cache_remove(dev, imsg->iova, imsg->size); 2664 2665 for (i = 0; i < dev->nr_vring; i++) { 2666 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2667 2668 if (!vq) 2669 continue; 2670 2671 if (is_vring_iotlb(dev, vq, imsg)) { 2672 rte_rwlock_write_lock(&vq->access_lock); 2673 vring_invalidate(dev, vq); 2674 rte_rwlock_write_unlock(&vq->access_lock); 2675 } 2676 } 2677 break; 2678 default: 2679 VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid IOTLB message type (%d)\n", 2680 imsg->type); 2681 return RTE_VHOST_MSG_RESULT_ERR; 2682 } 2683 2684 return RTE_VHOST_MSG_RESULT_OK; 2685 } 2686 2687 static int 2688 vhost_user_set_postcopy_advise(struct virtio_net **pdev, 2689 struct vhu_msg_context *ctx, 2690 int main_fd __rte_unused) 2691 { 2692 struct virtio_net *dev = *pdev; 2693 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 2694 struct uffdio_api api_struct; 2695 2696 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); 2697 2698 if (dev->postcopy_ufd == -1) { 2699 VHOST_LOG_CONFIG(dev->ifname, ERR, 2700 "userfaultfd not available: %s\n", 2701 strerror(errno)); 2702 return RTE_VHOST_MSG_RESULT_ERR; 2703 } 2704 api_struct.api = UFFD_API; 2705 api_struct.features = 0; 2706 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) { 2707 VHOST_LOG_CONFIG(dev->ifname, ERR, 2708 "UFFDIO_API ioctl failure: %s\n", 2709 strerror(errno)); 2710 close(dev->postcopy_ufd); 2711 dev->postcopy_ufd = -1; 2712 return RTE_VHOST_MSG_RESULT_ERR; 2713 } 2714 ctx->fds[0] = dev->postcopy_ufd; 2715 ctx->fd_num = 1; 2716 2717 return RTE_VHOST_MSG_RESULT_REPLY; 2718 #else 2719 dev->postcopy_ufd = -1; 2720 ctx->fd_num = 0; 2721 2722 return RTE_VHOST_MSG_RESULT_ERR; 2723 #endif 2724 } 2725 2726 static int 2727 vhost_user_set_postcopy_listen(struct virtio_net **pdev, 2728 struct vhu_msg_context *ctx __rte_unused, 2729 int main_fd __rte_unused) 2730 { 2731 struct virtio_net *dev = *pdev; 2732 2733 if (dev->mem && dev->mem->nregions) { 2734 VHOST_LOG_CONFIG(dev->ifname, ERR, 2735 "regions already registered at postcopy-listen\n"); 2736 return RTE_VHOST_MSG_RESULT_ERR; 2737 } 2738 dev->postcopy_listening = 1; 2739 2740 return RTE_VHOST_MSG_RESULT_OK; 2741 } 2742 2743 static int 2744 vhost_user_postcopy_end(struct virtio_net **pdev, 2745 struct vhu_msg_context *ctx, 2746 int main_fd __rte_unused) 2747 { 2748 struct virtio_net *dev = *pdev; 2749 2750 dev->postcopy_listening = 0; 2751 if (dev->postcopy_ufd >= 0) { 2752 close(dev->postcopy_ufd); 2753 dev->postcopy_ufd = -1; 2754 } 2755 2756 ctx->msg.payload.u64 = 0; 2757 ctx->msg.size = sizeof(ctx->msg.payload.u64); 2758 ctx->fd_num = 0; 2759 2760 return RTE_VHOST_MSG_RESULT_REPLY; 2761 } 2762 2763 static int 2764 vhost_user_get_status(struct virtio_net **pdev, 2765 struct vhu_msg_context *ctx, 2766 int main_fd __rte_unused) 2767 { 2768 struct virtio_net *dev = *pdev; 2769 2770 ctx->msg.payload.u64 = dev->status; 2771 ctx->msg.size = sizeof(ctx->msg.payload.u64); 2772 ctx->fd_num = 0; 2773 2774 return RTE_VHOST_MSG_RESULT_REPLY; 2775 } 2776 2777 static int 2778 vhost_user_set_status(struct virtio_net **pdev, 2779 struct vhu_msg_context *ctx, 2780 int main_fd __rte_unused) 2781 { 2782 struct virtio_net *dev = *pdev; 2783 2784 /* As per Virtio specification, the device status is 8bits long */ 2785 if (ctx->msg.payload.u64 > UINT8_MAX) { 2786 VHOST_LOG_CONFIG(dev->ifname, ERR, 2787 "invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n", 2788 ctx->msg.payload.u64); 2789 return RTE_VHOST_MSG_RESULT_ERR; 2790 } 2791 2792 dev->status = ctx->msg.payload.u64; 2793 2794 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) && 2795 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) { 2796 VHOST_LOG_CONFIG(dev->ifname, ERR, 2797 "FEATURES_OK bit is set but feature negotiation failed\n"); 2798 /* 2799 * Clear the bit to let the driver know about the feature 2800 * negotiation failure 2801 */ 2802 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; 2803 } 2804 2805 VHOST_LOG_CONFIG(dev->ifname, INFO, "new device status(0x%08x):\n", dev->status); 2806 VHOST_LOG_CONFIG(dev->ifname, INFO, 2807 "\t-RESET: %u\n", 2808 (dev->status == VIRTIO_DEVICE_STATUS_RESET)); 2809 VHOST_LOG_CONFIG(dev->ifname, INFO, 2810 "\t-ACKNOWLEDGE: %u\n", 2811 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK)); 2812 VHOST_LOG_CONFIG(dev->ifname, INFO, 2813 "\t-DRIVER: %u\n", 2814 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER)); 2815 VHOST_LOG_CONFIG(dev->ifname, INFO, 2816 "\t-FEATURES_OK: %u\n", 2817 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK)); 2818 VHOST_LOG_CONFIG(dev->ifname, INFO, 2819 "\t-DRIVER_OK: %u\n", 2820 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)); 2821 VHOST_LOG_CONFIG(dev->ifname, INFO, 2822 "\t-DEVICE_NEED_RESET: %u\n", 2823 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET)); 2824 VHOST_LOG_CONFIG(dev->ifname, INFO, 2825 "\t-FAILED: %u\n", 2826 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED)); 2827 2828 return RTE_VHOST_MSG_RESULT_OK; 2829 } 2830 2831 #define VHOST_MESSAGE_HANDLERS \ 2832 VHOST_MESSAGE_HANDLER(VHOST_USER_NONE, NULL, false) \ 2833 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_FEATURES, vhost_user_get_features, false) \ 2834 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_FEATURES, vhost_user_set_features, false) \ 2835 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_OWNER, vhost_user_set_owner, false) \ 2836 VHOST_MESSAGE_HANDLER(VHOST_USER_RESET_OWNER, vhost_user_reset_owner, false) \ 2837 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_MEM_TABLE, vhost_user_set_mem_table, true) \ 2838 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_LOG_BASE, vhost_user_set_log_base, true) \ 2839 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_LOG_FD, vhost_user_set_log_fd, true) \ 2840 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_NUM, vhost_user_set_vring_num, false) \ 2841 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_ADDR, vhost_user_set_vring_addr, false) \ 2842 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_BASE, vhost_user_set_vring_base, false) \ 2843 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_VRING_BASE, vhost_user_get_vring_base, false) \ 2844 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_KICK, vhost_user_set_vring_kick, true) \ 2845 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_CALL, vhost_user_set_vring_call, true) \ 2846 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_ERR, vhost_user_set_vring_err, true) \ 2847 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_PROTOCOL_FEATURES, vhost_user_get_protocol_features, false) \ 2848 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_PROTOCOL_FEATURES, vhost_user_set_protocol_features, false) \ 2849 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_QUEUE_NUM, vhost_user_get_queue_num, false) \ 2850 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_VRING_ENABLE, vhost_user_set_vring_enable, false) \ 2851 VHOST_MESSAGE_HANDLER(VHOST_USER_SEND_RARP, vhost_user_send_rarp, false) \ 2852 VHOST_MESSAGE_HANDLER(VHOST_USER_NET_SET_MTU, vhost_user_net_set_mtu, false) \ 2853 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_BACKEND_REQ_FD, vhost_user_set_req_fd, true) \ 2854 VHOST_MESSAGE_HANDLER(VHOST_USER_IOTLB_MSG, vhost_user_iotlb_msg, false) \ 2855 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_CONFIG, vhost_user_get_config, false) \ 2856 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_CONFIG, vhost_user_set_config, false) \ 2857 VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_ADVISE, vhost_user_set_postcopy_advise, false) \ 2858 VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_LISTEN, vhost_user_set_postcopy_listen, false) \ 2859 VHOST_MESSAGE_HANDLER(VHOST_USER_POSTCOPY_END, vhost_user_postcopy_end, false) \ 2860 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_INFLIGHT_FD, vhost_user_get_inflight_fd, false) \ 2861 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_INFLIGHT_FD, vhost_user_set_inflight_fd, true) \ 2862 VHOST_MESSAGE_HANDLER(VHOST_USER_SET_STATUS, vhost_user_set_status, false) \ 2863 VHOST_MESSAGE_HANDLER(VHOST_USER_GET_STATUS, vhost_user_get_status, false) 2864 2865 #define VHOST_MESSAGE_HANDLER(id, handler, accepts_fd) \ 2866 [id] = { #id, handler, accepts_fd }, 2867 static vhost_message_handler_t vhost_message_handlers[] = { 2868 VHOST_MESSAGE_HANDLERS 2869 }; 2870 #undef VHOST_MESSAGE_HANDLER 2871 2872 /* return bytes# of read on success or negative val on failure. */ 2873 static int 2874 read_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) 2875 { 2876 int ret; 2877 2878 ret = read_fd_message(dev->ifname, sockfd, (char *)&ctx->msg, VHOST_USER_HDR_SIZE, 2879 ctx->fds, VHOST_MEMORY_MAX_NREGIONS, &ctx->fd_num); 2880 if (ret <= 0) 2881 goto out; 2882 2883 if (ret != VHOST_USER_HDR_SIZE) { 2884 VHOST_LOG_CONFIG(dev->ifname, ERR, "Unexpected header size read\n"); 2885 ret = -1; 2886 goto out; 2887 } 2888 2889 if (ctx->msg.size) { 2890 if (ctx->msg.size > sizeof(ctx->msg.payload)) { 2891 VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid msg size: %d\n", 2892 ctx->msg.size); 2893 ret = -1; 2894 goto out; 2895 } 2896 ret = read(sockfd, &ctx->msg.payload, ctx->msg.size); 2897 if (ret <= 0) 2898 goto out; 2899 if (ret != (int)ctx->msg.size) { 2900 VHOST_LOG_CONFIG(dev->ifname, ERR, "read control message failed\n"); 2901 ret = -1; 2902 goto out; 2903 } 2904 } 2905 2906 out: 2907 if (ret <= 0) 2908 close_msg_fds(ctx); 2909 2910 return ret; 2911 } 2912 2913 static int 2914 send_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) 2915 { 2916 if (!ctx) 2917 return 0; 2918 2919 return send_fd_message(dev->ifname, sockfd, (char *)&ctx->msg, 2920 VHOST_USER_HDR_SIZE + ctx->msg.size, ctx->fds, ctx->fd_num); 2921 } 2922 2923 static int 2924 send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) 2925 { 2926 if (!ctx) 2927 return 0; 2928 2929 ctx->msg.flags &= ~VHOST_USER_VERSION_MASK; 2930 ctx->msg.flags &= ~VHOST_USER_NEED_REPLY; 2931 ctx->msg.flags |= VHOST_USER_VERSION; 2932 ctx->msg.flags |= VHOST_USER_REPLY_MASK; 2933 2934 return send_vhost_message(dev, sockfd, ctx); 2935 } 2936 2937 static int 2938 send_vhost_backend_message(struct virtio_net *dev, struct vhu_msg_context *ctx) 2939 { 2940 return send_vhost_message(dev, dev->backend_req_fd, ctx); 2941 } 2942 2943 static int 2944 send_vhost_backend_message_process_reply(struct virtio_net *dev, struct vhu_msg_context *ctx) 2945 { 2946 struct vhu_msg_context msg_reply; 2947 int ret; 2948 2949 rte_spinlock_lock(&dev->backend_req_lock); 2950 ret = send_vhost_backend_message(dev, ctx); 2951 if (ret < 0) { 2952 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to send config change (%d)\n", ret); 2953 goto out; 2954 } 2955 2956 ret = read_vhost_message(dev, dev->backend_req_fd, &msg_reply); 2957 if (ret <= 0) { 2958 if (ret < 0) 2959 VHOST_LOG_CONFIG(dev->ifname, ERR, 2960 "vhost read backend message reply failed\n"); 2961 else 2962 VHOST_LOG_CONFIG(dev->ifname, INFO, "vhost peer closed\n"); 2963 ret = -1; 2964 goto out; 2965 } 2966 2967 if (msg_reply.msg.request.backend != ctx->msg.request.backend) { 2968 VHOST_LOG_CONFIG(dev->ifname, ERR, 2969 "received unexpected msg type (%u), expected %u\n", 2970 msg_reply.msg.request.backend, ctx->msg.request.backend); 2971 ret = -1; 2972 goto out; 2973 } 2974 2975 ret = msg_reply.msg.payload.u64 ? -1 : 0; 2976 out: 2977 rte_spinlock_unlock(&dev->backend_req_lock); 2978 return ret; 2979 } 2980 2981 /* 2982 * Allocate a queue pair if it hasn't been allocated yet 2983 */ 2984 static int 2985 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, 2986 struct vhu_msg_context *ctx) 2987 { 2988 uint32_t vring_idx; 2989 2990 switch (ctx->msg.request.frontend) { 2991 case VHOST_USER_SET_VRING_KICK: 2992 case VHOST_USER_SET_VRING_CALL: 2993 case VHOST_USER_SET_VRING_ERR: 2994 vring_idx = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 2995 break; 2996 case VHOST_USER_SET_VRING_NUM: 2997 case VHOST_USER_SET_VRING_BASE: 2998 case VHOST_USER_GET_VRING_BASE: 2999 case VHOST_USER_SET_VRING_ENABLE: 3000 vring_idx = ctx->msg.payload.state.index; 3001 break; 3002 case VHOST_USER_SET_VRING_ADDR: 3003 vring_idx = ctx->msg.payload.addr.index; 3004 break; 3005 case VHOST_USER_SET_INFLIGHT_FD: 3006 vring_idx = ctx->msg.payload.inflight.num_queues - 1; 3007 break; 3008 default: 3009 return 0; 3010 } 3011 3012 if (vring_idx >= VHOST_MAX_VRING) { 3013 VHOST_LOG_CONFIG(dev->ifname, ERR, "invalid vring index: %u\n", vring_idx); 3014 return -1; 3015 } 3016 3017 if (dev->virtqueue[vring_idx]) 3018 return 0; 3019 3020 return alloc_vring_queue(dev, vring_idx); 3021 } 3022 3023 static void 3024 vhost_user_lock_all_queue_pairs(struct virtio_net *dev) 3025 __rte_no_thread_safety_analysis 3026 { 3027 unsigned int i = 0; 3028 unsigned int vq_num = 0; 3029 3030 while (vq_num < dev->nr_vring) { 3031 struct vhost_virtqueue *vq = dev->virtqueue[i]; 3032 3033 if (vq) { 3034 rte_rwlock_write_lock(&vq->access_lock); 3035 vq_num++; 3036 } 3037 i++; 3038 } 3039 } 3040 3041 static void 3042 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev) 3043 __rte_no_thread_safety_analysis 3044 { 3045 unsigned int i = 0; 3046 unsigned int vq_num = 0; 3047 3048 while (vq_num < dev->nr_vring) { 3049 struct vhost_virtqueue *vq = dev->virtqueue[i]; 3050 3051 if (vq) { 3052 rte_rwlock_write_unlock(&vq->access_lock); 3053 vq_num++; 3054 } 3055 i++; 3056 } 3057 } 3058 3059 int 3060 vhost_user_msg_handler(int vid, int fd) 3061 { 3062 struct virtio_net *dev; 3063 struct vhu_msg_context ctx; 3064 vhost_message_handler_t *msg_handler; 3065 struct rte_vdpa_device *vdpa_dev; 3066 int msg_result = RTE_VHOST_MSG_RESULT_OK; 3067 int ret; 3068 int unlock_required = 0; 3069 bool handled; 3070 uint32_t request; 3071 uint32_t i; 3072 uint16_t blk_call_fd; 3073 3074 dev = get_device(vid); 3075 if (dev == NULL) 3076 return -1; 3077 3078 if (!dev->notify_ops) { 3079 dev->notify_ops = vhost_driver_callback_get(dev->ifname); 3080 if (!dev->notify_ops) { 3081 VHOST_LOG_CONFIG(dev->ifname, ERR, 3082 "failed to get callback ops for driver\n"); 3083 return -1; 3084 } 3085 } 3086 3087 ctx.msg.request.frontend = VHOST_USER_NONE; 3088 ret = read_vhost_message(dev, fd, &ctx); 3089 if (ret == 0) { 3090 VHOST_LOG_CONFIG(dev->ifname, INFO, "vhost peer closed\n"); 3091 return -1; 3092 } 3093 3094 request = ctx.msg.request.frontend; 3095 if (request > VHOST_USER_NONE && request < RTE_DIM(vhost_message_handlers)) 3096 msg_handler = &vhost_message_handlers[request]; 3097 else 3098 msg_handler = NULL; 3099 3100 if (ret < 0) { 3101 VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost read message %s%s%sfailed\n", 3102 msg_handler != NULL ? "for " : "", 3103 msg_handler != NULL ? msg_handler->description : "", 3104 msg_handler != NULL ? " " : ""); 3105 return -1; 3106 } 3107 3108 if (msg_handler != NULL && msg_handler->description != NULL) { 3109 if (request != VHOST_USER_IOTLB_MSG) 3110 VHOST_LOG_CONFIG(dev->ifname, INFO, 3111 "read message %s\n", 3112 msg_handler->description); 3113 else 3114 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 3115 "read message %s\n", 3116 msg_handler->description); 3117 } else { 3118 VHOST_LOG_CONFIG(dev->ifname, DEBUG, "external request %d\n", request); 3119 } 3120 3121 ret = vhost_user_check_and_alloc_queue_pair(dev, &ctx); 3122 if (ret < 0) { 3123 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to alloc queue\n"); 3124 return -1; 3125 } 3126 3127 /* 3128 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE 3129 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops 3130 * and device is destroyed. destroy_device waits for queues to be 3131 * inactive, so it is safe. Otherwise taking the access_lock 3132 * would cause a dead lock. 3133 */ 3134 switch (request) { 3135 case VHOST_USER_SET_FEATURES: 3136 case VHOST_USER_SET_PROTOCOL_FEATURES: 3137 case VHOST_USER_SET_OWNER: 3138 case VHOST_USER_SET_MEM_TABLE: 3139 case VHOST_USER_SET_LOG_BASE: 3140 case VHOST_USER_SET_LOG_FD: 3141 case VHOST_USER_SET_VRING_NUM: 3142 case VHOST_USER_SET_VRING_ADDR: 3143 case VHOST_USER_SET_VRING_BASE: 3144 case VHOST_USER_SET_VRING_KICK: 3145 case VHOST_USER_SET_VRING_CALL: 3146 case VHOST_USER_SET_VRING_ERR: 3147 case VHOST_USER_SET_VRING_ENABLE: 3148 case VHOST_USER_SEND_RARP: 3149 case VHOST_USER_NET_SET_MTU: 3150 case VHOST_USER_SET_BACKEND_REQ_FD: 3151 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 3152 vhost_user_lock_all_queue_pairs(dev); 3153 unlock_required = 1; 3154 } 3155 break; 3156 default: 3157 break; 3158 3159 } 3160 3161 handled = false; 3162 if (dev->extern_ops.pre_msg_handle) { 3163 RTE_BUILD_BUG_ON(offsetof(struct vhu_msg_context, msg) != 0); 3164 msg_result = (*dev->extern_ops.pre_msg_handle)(dev->vid, &ctx); 3165 switch (msg_result) { 3166 case RTE_VHOST_MSG_RESULT_REPLY: 3167 send_vhost_reply(dev, fd, &ctx); 3168 /* Fall-through */ 3169 case RTE_VHOST_MSG_RESULT_ERR: 3170 case RTE_VHOST_MSG_RESULT_OK: 3171 handled = true; 3172 goto skip_to_post_handle; 3173 case RTE_VHOST_MSG_RESULT_NOT_HANDLED: 3174 default: 3175 break; 3176 } 3177 } 3178 3179 if (msg_handler == NULL || msg_handler->callback == NULL) 3180 goto skip_to_post_handle; 3181 3182 if (!msg_handler->accepts_fd && validate_msg_fds(dev, &ctx, 0) != 0) { 3183 msg_result = RTE_VHOST_MSG_RESULT_ERR; 3184 } else { 3185 msg_result = msg_handler->callback(&dev, &ctx, fd); 3186 } 3187 3188 switch (msg_result) { 3189 case RTE_VHOST_MSG_RESULT_ERR: 3190 VHOST_LOG_CONFIG(dev->ifname, ERR, 3191 "processing %s failed.\n", 3192 msg_handler->description); 3193 handled = true; 3194 break; 3195 case RTE_VHOST_MSG_RESULT_OK: 3196 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 3197 "processing %s succeeded.\n", 3198 msg_handler->description); 3199 handled = true; 3200 break; 3201 case RTE_VHOST_MSG_RESULT_REPLY: 3202 VHOST_LOG_CONFIG(dev->ifname, DEBUG, 3203 "processing %s succeeded and needs reply.\n", 3204 msg_handler->description); 3205 send_vhost_reply(dev, fd, &ctx); 3206 handled = true; 3207 break; 3208 default: 3209 break; 3210 } 3211 3212 skip_to_post_handle: 3213 if (msg_result != RTE_VHOST_MSG_RESULT_ERR && 3214 dev->extern_ops.post_msg_handle) { 3215 RTE_BUILD_BUG_ON(offsetof(struct vhu_msg_context, msg) != 0); 3216 msg_result = (*dev->extern_ops.post_msg_handle)(dev->vid, &ctx); 3217 switch (msg_result) { 3218 case RTE_VHOST_MSG_RESULT_REPLY: 3219 send_vhost_reply(dev, fd, &ctx); 3220 /* Fall-through */ 3221 case RTE_VHOST_MSG_RESULT_ERR: 3222 case RTE_VHOST_MSG_RESULT_OK: 3223 handled = true; 3224 case RTE_VHOST_MSG_RESULT_NOT_HANDLED: 3225 default: 3226 break; 3227 } 3228 } 3229 3230 /* If message was not handled at this stage, treat it as an error */ 3231 if (!handled) { 3232 VHOST_LOG_CONFIG(dev->ifname, ERR, 3233 "vhost message (req: %d) was not handled.\n", 3234 request); 3235 close_msg_fds(&ctx); 3236 msg_result = RTE_VHOST_MSG_RESULT_ERR; 3237 } 3238 3239 /* 3240 * If the request required a reply that was already sent, 3241 * this optional reply-ack won't be sent as the 3242 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply(). 3243 */ 3244 if (ctx.msg.flags & VHOST_USER_NEED_REPLY) { 3245 ctx.msg.payload.u64 = msg_result == RTE_VHOST_MSG_RESULT_ERR; 3246 ctx.msg.size = sizeof(ctx.msg.payload.u64); 3247 ctx.fd_num = 0; 3248 send_vhost_reply(dev, fd, &ctx); 3249 } else if (msg_result == RTE_VHOST_MSG_RESULT_ERR) { 3250 VHOST_LOG_CONFIG(dev->ifname, ERR, "vhost message handling failed.\n"); 3251 ret = -1; 3252 goto unlock; 3253 } 3254 3255 for (i = 0; i < dev->nr_vring; i++) { 3256 struct vhost_virtqueue *vq = dev->virtqueue[i]; 3257 bool cur_ready = vq_is_ready(dev, vq); 3258 3259 if (cur_ready != (vq && vq->ready)) { 3260 vq->ready = cur_ready; 3261 vhost_user_notify_queue_state(dev, vq, cur_ready); 3262 } 3263 } 3264 3265 unlock: 3266 if (unlock_required) 3267 vhost_user_unlock_all_queue_pairs(dev); 3268 3269 if (ret != 0 || !virtio_is_ready(dev)) 3270 goto out; 3271 3272 /* 3273 * Virtio is now ready. If not done already, it is time 3274 * to notify the application it can process the rings and 3275 * configure the vDPA device if present. 3276 */ 3277 3278 if (!(dev->flags & VIRTIO_DEV_RUNNING)) { 3279 if (dev->notify_ops->new_device(dev->vid) == 0) 3280 dev->flags |= VIRTIO_DEV_RUNNING; 3281 } 3282 3283 vdpa_dev = dev->vdpa_dev; 3284 if (!vdpa_dev) 3285 goto out; 3286 3287 if (vdpa_dev->type == RTE_VHOST_VDPA_DEVICE_TYPE_BLK) { 3288 if (request == VHOST_USER_SET_VRING_CALL) { 3289 blk_call_fd = ctx.msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 3290 if (blk_call_fd != dev->nr_vring - 1) 3291 goto out; 3292 } else { 3293 goto out; 3294 } 3295 } 3296 3297 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 3298 if (vdpa_dev->ops->dev_conf(dev->vid)) 3299 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to configure vDPA device\n"); 3300 else 3301 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED; 3302 } 3303 3304 out: 3305 return ret; 3306 } 3307 3308 static int 3309 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm) 3310 { 3311 int ret; 3312 struct vhu_msg_context ctx = { 3313 .msg = { 3314 .request.backend = VHOST_USER_BACKEND_IOTLB_MSG, 3315 .flags = VHOST_USER_VERSION, 3316 .size = sizeof(ctx.msg.payload.iotlb), 3317 .payload.iotlb = { 3318 .iova = iova, 3319 .perm = perm, 3320 .type = VHOST_IOTLB_MISS, 3321 }, 3322 }, 3323 }; 3324 3325 ret = send_vhost_message(dev, dev->backend_req_fd, &ctx); 3326 if (ret < 0) { 3327 VHOST_LOG_CONFIG(dev->ifname, ERR, 3328 "failed to send IOTLB miss message (%d)\n", 3329 ret); 3330 return ret; 3331 } 3332 3333 return 0; 3334 } 3335 3336 int 3337 rte_vhost_backend_config_change(int vid, bool need_reply) 3338 { 3339 struct vhu_msg_context ctx = { 3340 .msg = { 3341 .request.backend = VHOST_USER_BACKEND_CONFIG_CHANGE_MSG, 3342 .flags = VHOST_USER_VERSION, 3343 .size = 0, 3344 } 3345 }; 3346 struct virtio_net *dev; 3347 int ret; 3348 3349 dev = get_device(vid); 3350 if (!dev) 3351 return -ENODEV; 3352 3353 if (!need_reply) { 3354 ret = send_vhost_backend_message(dev, &ctx); 3355 } else { 3356 ctx.msg.flags |= VHOST_USER_NEED_REPLY; 3357 ret = send_vhost_backend_message_process_reply(dev, &ctx); 3358 } 3359 3360 if (ret < 0) 3361 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to send config change (%d)\n", ret); 3362 return ret; 3363 } 3364 3365 static int vhost_user_backend_set_vring_host_notifier(struct virtio_net *dev, 3366 int index, int fd, 3367 uint64_t offset, 3368 uint64_t size) 3369 { 3370 int ret; 3371 struct vhu_msg_context ctx = { 3372 .msg = { 3373 .request.backend = VHOST_USER_BACKEND_VRING_HOST_NOTIFIER_MSG, 3374 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY, 3375 .size = sizeof(ctx.msg.payload.area), 3376 .payload.area = { 3377 .u64 = index & VHOST_USER_VRING_IDX_MASK, 3378 .size = size, 3379 .offset = offset, 3380 }, 3381 }, 3382 }; 3383 3384 if (fd < 0) 3385 ctx.msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK; 3386 else { 3387 ctx.fds[0] = fd; 3388 ctx.fd_num = 1; 3389 } 3390 3391 ret = send_vhost_backend_message_process_reply(dev, &ctx); 3392 if (ret < 0) 3393 VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to set host notifier (%d)\n", ret); 3394 3395 return ret; 3396 } 3397 3398 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable) 3399 { 3400 struct virtio_net *dev; 3401 struct rte_vdpa_device *vdpa_dev; 3402 int vfio_device_fd, ret = 0; 3403 uint64_t offset, size; 3404 unsigned int i, q_start, q_last; 3405 3406 dev = get_device(vid); 3407 if (!dev) 3408 return -ENODEV; 3409 3410 vdpa_dev = dev->vdpa_dev; 3411 if (vdpa_dev == NULL) 3412 return -ENODEV; 3413 3414 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) || 3415 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) || 3416 !(dev->protocol_features & 3417 (1ULL << VHOST_USER_PROTOCOL_F_BACKEND_REQ)) || 3418 !(dev->protocol_features & 3419 (1ULL << VHOST_USER_PROTOCOL_F_BACKEND_SEND_FD)) || 3420 !(dev->protocol_features & 3421 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER))) 3422 return -ENOTSUP; 3423 3424 if (qid == RTE_VHOST_QUEUE_ALL) { 3425 q_start = 0; 3426 q_last = dev->nr_vring - 1; 3427 } else { 3428 if (qid >= dev->nr_vring) 3429 return -EINVAL; 3430 q_start = qid; 3431 q_last = qid; 3432 } 3433 3434 if (vdpa_dev->ops->get_vfio_device_fd == NULL) 3435 return -ENOTSUP; 3436 if (vdpa_dev->ops->get_notify_area == NULL) 3437 return -ENOTSUP; 3438 3439 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid); 3440 if (vfio_device_fd < 0) 3441 return -ENOTSUP; 3442 3443 if (enable) { 3444 for (i = q_start; i <= q_last; i++) { 3445 if (vdpa_dev->ops->get_notify_area(vid, i, &offset, 3446 &size) < 0) { 3447 ret = -ENOTSUP; 3448 goto disable; 3449 } 3450 3451 if (vhost_user_backend_set_vring_host_notifier(dev, i, 3452 vfio_device_fd, offset, size) < 0) { 3453 ret = -EFAULT; 3454 goto disable; 3455 } 3456 } 3457 } else { 3458 disable: 3459 for (i = q_start; i <= q_last; i++) { 3460 vhost_user_backend_set_vring_host_notifier(dev, i, -1, 3461 0, 0); 3462 } 3463 } 3464 3465 return ret; 3466 } 3467 3468 static int 3469 vhost_user_inject_irq(struct virtio_net *dev __rte_unused, struct vhost_virtqueue *vq) 3470 { 3471 if (vq->callfd < 0) 3472 return -1; 3473 3474 return eventfd_write(vq->callfd, (eventfd_t)1); 3475 } 3476 3477 static struct vhost_backend_ops vhost_user_backend_ops = { 3478 .iotlb_miss = vhost_user_iotlb_miss, 3479 .inject_irq = vhost_user_inject_irq, 3480 }; 3481 3482 int 3483 vhost_user_new_device(void) 3484 { 3485 return vhost_new_device(&vhost_user_backend_ops); 3486 } 3487