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