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