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