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