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