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/types.h> 31 #include <sys/stat.h> 32 #include <sys/syscall.h> 33 #include <assert.h> 34 #ifdef RTE_LIBRTE_VHOST_NUMA 35 #include <numaif.h> 36 #endif 37 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 38 #include <linux/userfaultfd.h> 39 #endif 40 #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */ 41 #include <linux/memfd.h> 42 #define MEMFD_SUPPORTED 43 #endif 44 45 #include <rte_common.h> 46 #include <rte_malloc.h> 47 #include <rte_log.h> 48 #include <rte_vfio.h> 49 #include <rte_errno.h> 50 51 #include "iotlb.h" 52 #include "vhost.h" 53 #include "vhost_user.h" 54 55 #define VIRTIO_MIN_MTU 68 56 #define VIRTIO_MAX_MTU 65535 57 58 #define INFLIGHT_ALIGNMENT 64 59 #define INFLIGHT_VERSION 0x1 60 61 static const char *vhost_message_str[VHOST_USER_MAX] = { 62 [VHOST_USER_NONE] = "VHOST_USER_NONE", 63 [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES", 64 [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES", 65 [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER", 66 [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER", 67 [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE", 68 [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE", 69 [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD", 70 [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM", 71 [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR", 72 [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE", 73 [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE", 74 [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK", 75 [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL", 76 [VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR", 77 [VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES", 78 [VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES", 79 [VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM", 80 [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE", 81 [VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP", 82 [VHOST_USER_NET_SET_MTU] = "VHOST_USER_NET_SET_MTU", 83 [VHOST_USER_SET_SLAVE_REQ_FD] = "VHOST_USER_SET_SLAVE_REQ_FD", 84 [VHOST_USER_IOTLB_MSG] = "VHOST_USER_IOTLB_MSG", 85 [VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS", 86 [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS", 87 [VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE", 88 [VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN", 89 [VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END", 90 [VHOST_USER_GET_INFLIGHT_FD] = "VHOST_USER_GET_INFLIGHT_FD", 91 [VHOST_USER_SET_INFLIGHT_FD] = "VHOST_USER_SET_INFLIGHT_FD", 92 [VHOST_USER_SET_STATUS] = "VHOST_USER_SET_STATUS", 93 [VHOST_USER_GET_STATUS] = "VHOST_USER_GET_STATUS", 94 }; 95 96 static int send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx); 97 static int read_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx); 98 99 static void 100 close_msg_fds(struct vhu_msg_context *ctx) 101 { 102 int i; 103 104 for (i = 0; i < ctx->fd_num; i++) { 105 int fd = ctx->fds[i]; 106 107 if (fd == -1) 108 continue; 109 110 ctx->fds[i] = -1; 111 close(fd); 112 } 113 } 114 115 /* 116 * Ensure the expected number of FDs is received, 117 * close all FDs and return an error if this is not the case. 118 */ 119 static int 120 validate_msg_fds(struct virtio_net *dev, struct vhu_msg_context *ctx, int expected_fds) 121 { 122 if (ctx->fd_num == expected_fds) 123 return 0; 124 125 VHOST_LOG_CONFIG(ERR, "(%s) expect %d FDs for request %s, received %d\n", 126 dev->ifname, expected_fds, 127 vhost_message_str[ctx->msg.request.master], 128 ctx->fd_num); 129 130 close_msg_fds(ctx); 131 132 return -1; 133 } 134 135 static uint64_t 136 get_blk_size(int fd) 137 { 138 struct stat stat; 139 int ret; 140 141 ret = fstat(fd, &stat); 142 return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize; 143 } 144 145 static int 146 async_dma_map(struct virtio_net *dev, struct rte_vhost_mem_region *region, bool do_map) 147 { 148 uint64_t host_iova; 149 int ret = 0; 150 151 host_iova = rte_mem_virt2iova((void *)(uintptr_t)region->host_user_addr); 152 if (do_map) { 153 /* Add mapped region into the default container of DPDK. */ 154 ret = rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD, 155 region->host_user_addr, 156 host_iova, 157 region->size); 158 if (ret) { 159 /* 160 * DMA device may bind with kernel driver, in this case, 161 * we don't need to program IOMMU manually. However, if no 162 * device is bound with vfio/uio in DPDK, and vfio kernel 163 * module is loaded, the API will still be called and return 164 * with ENODEV/ENOSUP. 165 * 166 * DPDK vfio only returns ENODEV/ENOSUP in very similar 167 * situations(vfio either unsupported, or supported 168 * but no devices found). Either way, no mappings could be 169 * performed. We treat it as normal case in async path. 170 */ 171 if (rte_errno == ENODEV || rte_errno == ENOTSUP) 172 return 0; 173 174 VHOST_LOG_CONFIG(ERR, "(%s) DMA engine map failed\n", dev->ifname); 175 /* DMA mapping errors won't stop VHST_USER_SET_MEM_TABLE. */ 176 return 0; 177 } 178 179 } else { 180 /* Remove mapped region from the default container of DPDK. */ 181 ret = rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD, 182 region->host_user_addr, 183 host_iova, 184 region->size); 185 if (ret) { 186 /* like DMA map, ignore the kernel driver case when unmap. */ 187 if (rte_errno == EINVAL) 188 return 0; 189 190 VHOST_LOG_CONFIG(ERR, "(%s) DMA engine unmap failed\n", dev->ifname); 191 return ret; 192 } 193 } 194 195 return ret; 196 } 197 198 static void 199 free_mem_region(struct virtio_net *dev) 200 { 201 uint32_t i; 202 struct rte_vhost_mem_region *reg; 203 204 if (!dev || !dev->mem) 205 return; 206 207 for (i = 0; i < dev->mem->nregions; i++) { 208 reg = &dev->mem->regions[i]; 209 if (reg->host_user_addr) { 210 if (dev->async_copy && rte_vfio_is_enabled("vfio")) 211 async_dma_map(dev, reg, false); 212 213 munmap(reg->mmap_addr, reg->mmap_size); 214 close(reg->fd); 215 } 216 } 217 } 218 219 void 220 vhost_backend_cleanup(struct virtio_net *dev) 221 { 222 struct rte_vdpa_device *vdpa_dev; 223 224 vdpa_dev = dev->vdpa_dev; 225 if (vdpa_dev && vdpa_dev->ops->dev_cleanup != NULL) 226 vdpa_dev->ops->dev_cleanup(dev->vid); 227 228 if (dev->mem) { 229 free_mem_region(dev); 230 rte_free(dev->mem); 231 dev->mem = NULL; 232 } 233 234 rte_free(dev->guest_pages); 235 dev->guest_pages = NULL; 236 237 if (dev->log_addr) { 238 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size); 239 dev->log_addr = 0; 240 } 241 242 if (dev->inflight_info) { 243 if (dev->inflight_info->addr) { 244 munmap(dev->inflight_info->addr, 245 dev->inflight_info->size); 246 dev->inflight_info->addr = NULL; 247 } 248 249 if (dev->inflight_info->fd >= 0) { 250 close(dev->inflight_info->fd); 251 dev->inflight_info->fd = -1; 252 } 253 254 rte_free(dev->inflight_info); 255 dev->inflight_info = NULL; 256 } 257 258 if (dev->slave_req_fd >= 0) { 259 close(dev->slave_req_fd); 260 dev->slave_req_fd = -1; 261 } 262 263 if (dev->postcopy_ufd >= 0) { 264 close(dev->postcopy_ufd); 265 dev->postcopy_ufd = -1; 266 } 267 268 dev->postcopy_listening = 0; 269 } 270 271 static void 272 vhost_user_notify_queue_state(struct virtio_net *dev, uint16_t index, 273 int enable) 274 { 275 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 276 struct vhost_virtqueue *vq = dev->virtqueue[index]; 277 278 /* Configure guest notifications on enable */ 279 if (enable && vq->notif_enable != VIRTIO_UNINITIALIZED_NOTIF) 280 vhost_enable_guest_notification(dev, vq, vq->notif_enable); 281 282 if (vdpa_dev && vdpa_dev->ops->set_vring_state) 283 vdpa_dev->ops->set_vring_state(dev->vid, index, enable); 284 285 if (dev->notify_ops->vring_state_changed) 286 dev->notify_ops->vring_state_changed(dev->vid, 287 index, enable); 288 } 289 290 /* 291 * This function just returns success at the moment unless 292 * the device hasn't been initialised. 293 */ 294 static int 295 vhost_user_set_owner(struct virtio_net **pdev, 296 struct vhu_msg_context *ctx, 297 int main_fd __rte_unused) 298 { 299 struct virtio_net *dev = *pdev; 300 301 if (validate_msg_fds(dev, ctx, 0) != 0) 302 return RTE_VHOST_MSG_RESULT_ERR; 303 304 return RTE_VHOST_MSG_RESULT_OK; 305 } 306 307 static int 308 vhost_user_reset_owner(struct virtio_net **pdev, 309 struct vhu_msg_context *ctx, 310 int main_fd __rte_unused) 311 { 312 struct virtio_net *dev = *pdev; 313 314 if (validate_msg_fds(dev, ctx, 0) != 0) 315 return RTE_VHOST_MSG_RESULT_ERR; 316 317 vhost_destroy_device_notify(dev); 318 319 cleanup_device(dev, 0); 320 reset_device(dev); 321 return RTE_VHOST_MSG_RESULT_OK; 322 } 323 324 /* 325 * The features that we support are requested. 326 */ 327 static int 328 vhost_user_get_features(struct virtio_net **pdev, 329 struct vhu_msg_context *ctx, 330 int main_fd __rte_unused) 331 { 332 struct virtio_net *dev = *pdev; 333 uint64_t features = 0; 334 335 if (validate_msg_fds(dev, ctx, 0) != 0) 336 return RTE_VHOST_MSG_RESULT_ERR; 337 338 rte_vhost_driver_get_features(dev->ifname, &features); 339 340 ctx->msg.payload.u64 = features; 341 ctx->msg.size = sizeof(ctx->msg.payload.u64); 342 ctx->fd_num = 0; 343 344 return RTE_VHOST_MSG_RESULT_REPLY; 345 } 346 347 /* 348 * The queue number that we support are requested. 349 */ 350 static int 351 vhost_user_get_queue_num(struct virtio_net **pdev, 352 struct vhu_msg_context *ctx, 353 int main_fd __rte_unused) 354 { 355 struct virtio_net *dev = *pdev; 356 uint32_t queue_num = 0; 357 358 if (validate_msg_fds(dev, ctx, 0) != 0) 359 return RTE_VHOST_MSG_RESULT_ERR; 360 361 rte_vhost_driver_get_queue_num(dev->ifname, &queue_num); 362 363 ctx->msg.payload.u64 = (uint64_t)queue_num; 364 ctx->msg.size = sizeof(ctx->msg.payload.u64); 365 ctx->fd_num = 0; 366 367 return RTE_VHOST_MSG_RESULT_REPLY; 368 } 369 370 /* 371 * We receive the negotiated features supported by us and the virtio device. 372 */ 373 static int 374 vhost_user_set_features(struct virtio_net **pdev, 375 struct vhu_msg_context *ctx, 376 int main_fd __rte_unused) 377 { 378 struct virtio_net *dev = *pdev; 379 uint64_t features = ctx->msg.payload.u64; 380 uint64_t vhost_features = 0; 381 struct rte_vdpa_device *vdpa_dev; 382 383 if (validate_msg_fds(dev, ctx, 0) != 0) 384 return RTE_VHOST_MSG_RESULT_ERR; 385 386 rte_vhost_driver_get_features(dev->ifname, &vhost_features); 387 if (features & ~vhost_features) { 388 VHOST_LOG_CONFIG(ERR, "(%s) received invalid negotiated features.\n", 389 dev->ifname); 390 dev->flags |= VIRTIO_DEV_FEATURES_FAILED; 391 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; 392 393 return RTE_VHOST_MSG_RESULT_ERR; 394 } 395 396 if (dev->flags & VIRTIO_DEV_RUNNING) { 397 if (dev->features == features) 398 return RTE_VHOST_MSG_RESULT_OK; 399 400 /* 401 * Error out if master tries to change features while device is 402 * in running state. The exception being VHOST_F_LOG_ALL, which 403 * is enabled when the live-migration starts. 404 */ 405 if ((dev->features ^ features) & ~(1ULL << VHOST_F_LOG_ALL)) { 406 VHOST_LOG_CONFIG(ERR, "(%s) features changed while device is running.\n", 407 dev->ifname); 408 return RTE_VHOST_MSG_RESULT_ERR; 409 } 410 411 if (dev->notify_ops->features_changed) 412 dev->notify_ops->features_changed(dev->vid, features); 413 } 414 415 dev->features = features; 416 if (dev->features & 417 ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | 418 (1ULL << VIRTIO_F_VERSION_1) | 419 (1ULL << VIRTIO_F_RING_PACKED))) { 420 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf); 421 } else { 422 dev->vhost_hlen = sizeof(struct virtio_net_hdr); 423 } 424 VHOST_LOG_CONFIG(INFO, "(%s) negotiated Virtio features: 0x%" PRIx64 "\n", 425 dev->ifname, dev->features); 426 VHOST_LOG_CONFIG(DEBUG, "(%s) mergeable RX buffers %s, virtio 1 %s\n", 427 dev->ifname, 428 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off", 429 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off"); 430 431 if ((dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) && 432 !(dev->features & (1ULL << VIRTIO_NET_F_MQ))) { 433 /* 434 * Remove all but first queue pair if MQ hasn't been 435 * negotiated. This is safe because the device is not 436 * running at this stage. 437 */ 438 while (dev->nr_vring > 2) { 439 struct vhost_virtqueue *vq; 440 441 vq = dev->virtqueue[--dev->nr_vring]; 442 if (!vq) 443 continue; 444 445 dev->virtqueue[dev->nr_vring] = NULL; 446 cleanup_vq(vq, 1); 447 cleanup_vq_inflight(dev, vq); 448 free_vq(dev, vq); 449 } 450 } 451 452 vdpa_dev = dev->vdpa_dev; 453 if (vdpa_dev) 454 vdpa_dev->ops->set_features(dev->vid); 455 456 dev->flags &= ~VIRTIO_DEV_FEATURES_FAILED; 457 return RTE_VHOST_MSG_RESULT_OK; 458 } 459 460 /* 461 * The virtio device sends us the size of the descriptor ring. 462 */ 463 static int 464 vhost_user_set_vring_num(struct virtio_net **pdev, 465 struct vhu_msg_context *ctx, 466 int main_fd __rte_unused) 467 { 468 struct virtio_net *dev = *pdev; 469 struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; 470 471 if (validate_msg_fds(dev, ctx, 0) != 0) 472 return RTE_VHOST_MSG_RESULT_ERR; 473 474 if (ctx->msg.payload.state.num > 32768) { 475 VHOST_LOG_CONFIG(ERR, "(%s) invalid virtqueue size %u\n", 476 dev->ifname, ctx->msg.payload.state.num); 477 return RTE_VHOST_MSG_RESULT_ERR; 478 } 479 480 vq->size = ctx->msg.payload.state.num; 481 482 /* VIRTIO 1.0, 2.4 Virtqueues says: 483 * 484 * Queue Size value is always a power of 2. The maximum Queue Size 485 * value is 32768. 486 * 487 * VIRTIO 1.1 2.7 Virtqueues says: 488 * 489 * Packed virtqueues support up to 2^15 entries each. 490 */ 491 if (!vq_is_packed(dev)) { 492 if (vq->size & (vq->size - 1)) { 493 VHOST_LOG_CONFIG(ERR, "(%s) invalid virtqueue size %u\n", 494 dev->ifname, vq->size); 495 return RTE_VHOST_MSG_RESULT_ERR; 496 } 497 } 498 499 if (vq_is_packed(dev)) { 500 rte_free(vq->shadow_used_packed); 501 vq->shadow_used_packed = rte_malloc_socket(NULL, 502 vq->size * 503 sizeof(struct vring_used_elem_packed), 504 RTE_CACHE_LINE_SIZE, vq->numa_node); 505 if (!vq->shadow_used_packed) { 506 VHOST_LOG_CONFIG(ERR, 507 "(%s) failed to allocate memory for shadow used ring.\n", 508 dev->ifname); 509 return RTE_VHOST_MSG_RESULT_ERR; 510 } 511 512 } else { 513 rte_free(vq->shadow_used_split); 514 515 vq->shadow_used_split = rte_malloc_socket(NULL, 516 vq->size * sizeof(struct vring_used_elem), 517 RTE_CACHE_LINE_SIZE, vq->numa_node); 518 519 if (!vq->shadow_used_split) { 520 VHOST_LOG_CONFIG(ERR, 521 "(%s) failed to allocate memory for vq internal data.\n", 522 dev->ifname); 523 return RTE_VHOST_MSG_RESULT_ERR; 524 } 525 } 526 527 rte_free(vq->batch_copy_elems); 528 vq->batch_copy_elems = rte_malloc_socket(NULL, 529 vq->size * sizeof(struct batch_copy_elem), 530 RTE_CACHE_LINE_SIZE, vq->numa_node); 531 if (!vq->batch_copy_elems) { 532 VHOST_LOG_CONFIG(ERR, "(%s) failed to allocate memory for batching copy.\n", 533 dev->ifname); 534 return RTE_VHOST_MSG_RESULT_ERR; 535 } 536 537 return RTE_VHOST_MSG_RESULT_OK; 538 } 539 540 /* 541 * Reallocate virtio_dev, vhost_virtqueue and related data structures to 542 * make them on the same numa node as the memory of vring descriptor. 543 */ 544 #ifdef RTE_LIBRTE_VHOST_NUMA 545 static struct virtio_net* 546 numa_realloc(struct virtio_net *dev, int index) 547 { 548 int node, dev_node; 549 struct virtio_net *old_dev; 550 struct vhost_virtqueue *vq; 551 struct batch_copy_elem *bce; 552 struct guest_page *gp; 553 struct rte_vhost_memory *mem; 554 size_t mem_size; 555 int ret; 556 557 old_dev = dev; 558 vq = dev->virtqueue[index]; 559 560 /* 561 * If VQ is ready, it is too late to reallocate, it certainly already 562 * happened anyway on VHOST_USER_SET_VRING_ADRR. 563 */ 564 if (vq->ready) 565 return dev; 566 567 ret = get_mempolicy(&node, NULL, 0, vq->desc, MPOL_F_NODE | MPOL_F_ADDR); 568 if (ret) { 569 VHOST_LOG_CONFIG(ERR, "(%s) unable to get virtqueue %d numa information.\n", 570 dev->ifname, index); 571 return dev; 572 } 573 574 if (node == vq->numa_node) 575 goto out_dev_realloc; 576 577 vq = rte_realloc_socket(vq, sizeof(*vq), 0, node); 578 if (!vq) { 579 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc virtqueue %d on node %d\n", 580 dev->ifname, index, node); 581 return dev; 582 } 583 584 if (vq != dev->virtqueue[index]) { 585 VHOST_LOG_CONFIG(INFO, "(%s) reallocated virtqueue on node %d\n", 586 dev->ifname, node); 587 dev->virtqueue[index] = vq; 588 vhost_user_iotlb_init(dev, index); 589 } 590 591 if (vq_is_packed(dev)) { 592 struct vring_used_elem_packed *sup; 593 594 sup = rte_realloc_socket(vq->shadow_used_packed, vq->size * sizeof(*sup), 595 RTE_CACHE_LINE_SIZE, node); 596 if (!sup) { 597 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc shadow packed on node %d\n", 598 dev->ifname, node); 599 return dev; 600 } 601 vq->shadow_used_packed = sup; 602 } else { 603 struct vring_used_elem *sus; 604 605 sus = rte_realloc_socket(vq->shadow_used_split, vq->size * sizeof(*sus), 606 RTE_CACHE_LINE_SIZE, node); 607 if (!sus) { 608 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc shadow split on node %d\n", 609 dev->ifname, node); 610 return dev; 611 } 612 vq->shadow_used_split = sus; 613 } 614 615 bce = rte_realloc_socket(vq->batch_copy_elems, vq->size * sizeof(*bce), 616 RTE_CACHE_LINE_SIZE, node); 617 if (!bce) { 618 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc batch copy elem on node %d\n", 619 dev->ifname, node); 620 return dev; 621 } 622 vq->batch_copy_elems = bce; 623 624 if (vq->log_cache) { 625 struct log_cache_entry *lc; 626 627 lc = rte_realloc_socket(vq->log_cache, sizeof(*lc) * VHOST_LOG_CACHE_NR, 0, node); 628 if (!lc) { 629 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc log cache on node %d\n", 630 dev->ifname, node); 631 return dev; 632 } 633 vq->log_cache = lc; 634 } 635 636 if (vq->resubmit_inflight) { 637 struct rte_vhost_resubmit_info *ri; 638 639 ri = rte_realloc_socket(vq->resubmit_inflight, sizeof(*ri), 0, node); 640 if (!ri) { 641 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc resubmit inflight on node %d\n", 642 dev->ifname, node); 643 return dev; 644 } 645 vq->resubmit_inflight = ri; 646 647 if (ri->resubmit_list) { 648 struct rte_vhost_resubmit_desc *rd; 649 650 rd = rte_realloc_socket(ri->resubmit_list, sizeof(*rd) * ri->resubmit_num, 651 0, node); 652 if (!rd) { 653 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc resubmit list on node %d\n", 654 dev->ifname, node); 655 return dev; 656 } 657 ri->resubmit_list = rd; 658 } 659 } 660 661 vq->numa_node = node; 662 663 out_dev_realloc: 664 665 if (dev->flags & VIRTIO_DEV_RUNNING) 666 return dev; 667 668 ret = get_mempolicy(&dev_node, NULL, 0, dev, MPOL_F_NODE | MPOL_F_ADDR); 669 if (ret) { 670 VHOST_LOG_CONFIG(ERR, "(%s) unable to get numa information.\n", dev->ifname); 671 return dev; 672 } 673 674 if (dev_node == node) 675 return dev; 676 677 dev = rte_realloc_socket(old_dev, sizeof(*dev), 0, node); 678 if (!dev) { 679 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc dev on node %d\n", 680 old_dev->ifname, node); 681 return old_dev; 682 } 683 684 VHOST_LOG_CONFIG(INFO, "(%s) reallocated device on node %d\n", dev->ifname, node); 685 vhost_devices[dev->vid] = dev; 686 687 mem_size = sizeof(struct rte_vhost_memory) + 688 sizeof(struct rte_vhost_mem_region) * dev->mem->nregions; 689 mem = rte_realloc_socket(dev->mem, mem_size, 0, node); 690 if (!mem) { 691 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc mem table on node %d\n", 692 dev->ifname, node); 693 return dev; 694 } 695 dev->mem = mem; 696 697 gp = rte_realloc_socket(dev->guest_pages, dev->max_guest_pages * sizeof(*gp), 698 RTE_CACHE_LINE_SIZE, node); 699 if (!gp) { 700 VHOST_LOG_CONFIG(ERR, "(%s) failed to realloc guest pages on node %d\n", 701 dev->ifname, node); 702 return dev; 703 } 704 dev->guest_pages = gp; 705 706 return dev; 707 } 708 #else 709 static struct virtio_net* 710 numa_realloc(struct virtio_net *dev, int index __rte_unused) 711 { 712 return dev; 713 } 714 #endif 715 716 /* Converts QEMU virtual address to Vhost virtual address. */ 717 static uint64_t 718 qva_to_vva(struct virtio_net *dev, uint64_t qva, uint64_t *len) 719 { 720 struct rte_vhost_mem_region *r; 721 uint32_t i; 722 723 if (unlikely(!dev || !dev->mem)) 724 goto out_error; 725 726 /* Find the region where the address lives. */ 727 for (i = 0; i < dev->mem->nregions; i++) { 728 r = &dev->mem->regions[i]; 729 730 if (qva >= r->guest_user_addr && 731 qva < r->guest_user_addr + r->size) { 732 733 if (unlikely(*len > r->guest_user_addr + r->size - qva)) 734 *len = r->guest_user_addr + r->size - qva; 735 736 return qva - r->guest_user_addr + 737 r->host_user_addr; 738 } 739 } 740 out_error: 741 *len = 0; 742 743 return 0; 744 } 745 746 747 /* 748 * Converts ring address to Vhost virtual address. 749 * If IOMMU is enabled, the ring address is a guest IO virtual address, 750 * else it is a QEMU virtual address. 751 */ 752 static uint64_t 753 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq, 754 uint64_t ra, uint64_t *size) 755 { 756 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) { 757 uint64_t vva; 758 759 vhost_user_iotlb_rd_lock(vq); 760 vva = vhost_iova_to_vva(dev, vq, ra, 761 size, VHOST_ACCESS_RW); 762 vhost_user_iotlb_rd_unlock(vq); 763 764 return vva; 765 } 766 767 return qva_to_vva(dev, ra, size); 768 } 769 770 static uint64_t 771 log_addr_to_gpa(struct virtio_net *dev, struct vhost_virtqueue *vq) 772 { 773 uint64_t log_gpa; 774 775 vhost_user_iotlb_rd_lock(vq); 776 log_gpa = translate_log_addr(dev, vq, vq->ring_addrs.log_guest_addr); 777 vhost_user_iotlb_rd_unlock(vq); 778 779 return log_gpa; 780 } 781 782 static struct virtio_net * 783 translate_ring_addresses(struct virtio_net *dev, int vq_index) 784 { 785 struct vhost_virtqueue *vq = dev->virtqueue[vq_index]; 786 struct vhost_vring_addr *addr = &vq->ring_addrs; 787 uint64_t len, expected_len; 788 789 if (addr->flags & (1 << VHOST_VRING_F_LOG)) { 790 vq->log_guest_addr = 791 log_addr_to_gpa(dev, vq); 792 if (vq->log_guest_addr == 0) { 793 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to map log_guest_addr.\n", 794 dev->ifname); 795 return dev; 796 } 797 } 798 799 if (vq_is_packed(dev)) { 800 len = sizeof(struct vring_packed_desc) * vq->size; 801 vq->desc_packed = (struct vring_packed_desc *)(uintptr_t) 802 ring_addr_to_vva(dev, vq, addr->desc_user_addr, &len); 803 if (vq->desc_packed == NULL || 804 len != sizeof(struct vring_packed_desc) * 805 vq->size) { 806 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to map desc_packed ring.\n", 807 dev->ifname); 808 return dev; 809 } 810 811 dev = numa_realloc(dev, vq_index); 812 vq = dev->virtqueue[vq_index]; 813 addr = &vq->ring_addrs; 814 815 len = sizeof(struct vring_packed_desc_event); 816 vq->driver_event = (struct vring_packed_desc_event *) 817 (uintptr_t)ring_addr_to_vva(dev, 818 vq, addr->avail_user_addr, &len); 819 if (vq->driver_event == NULL || 820 len != sizeof(struct vring_packed_desc_event)) { 821 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to find driver area address.\n", 822 dev->ifname); 823 return dev; 824 } 825 826 len = sizeof(struct vring_packed_desc_event); 827 vq->device_event = (struct vring_packed_desc_event *) 828 (uintptr_t)ring_addr_to_vva(dev, 829 vq, addr->used_user_addr, &len); 830 if (vq->device_event == NULL || 831 len != sizeof(struct vring_packed_desc_event)) { 832 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to find device area address.\n", 833 dev->ifname); 834 return dev; 835 } 836 837 vq->access_ok = true; 838 return dev; 839 } 840 841 /* The addresses are converted from QEMU virtual to Vhost virtual. */ 842 if (vq->desc && vq->avail && vq->used) 843 return dev; 844 845 len = sizeof(struct vring_desc) * vq->size; 846 vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev, 847 vq, addr->desc_user_addr, &len); 848 if (vq->desc == 0 || len != sizeof(struct vring_desc) * vq->size) { 849 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to map desc ring.\n", dev->ifname); 850 return dev; 851 } 852 853 dev = numa_realloc(dev, vq_index); 854 vq = dev->virtqueue[vq_index]; 855 addr = &vq->ring_addrs; 856 857 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size; 858 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) 859 len += sizeof(uint16_t); 860 expected_len = len; 861 vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev, 862 vq, addr->avail_user_addr, &len); 863 if (vq->avail == 0 || len != expected_len) { 864 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to map avail ring.\n", dev->ifname); 865 return dev; 866 } 867 868 len = sizeof(struct vring_used) + 869 sizeof(struct vring_used_elem) * vq->size; 870 if (dev->features & (1ULL << VIRTIO_RING_F_EVENT_IDX)) 871 len += sizeof(uint16_t); 872 expected_len = len; 873 vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev, 874 vq, addr->used_user_addr, &len); 875 if (vq->used == 0 || len != expected_len) { 876 VHOST_LOG_CONFIG(DEBUG, "(%s) failed to map used ring.\n", dev->ifname); 877 return dev; 878 } 879 880 if (vq->last_used_idx != vq->used->idx) { 881 VHOST_LOG_CONFIG(WARNING, "(%s) last_used_idx (%u) and vq->used->idx (%u) mismatches;\n", 882 dev->ifname, 883 vq->last_used_idx, vq->used->idx); 884 vq->last_used_idx = vq->used->idx; 885 vq->last_avail_idx = vq->used->idx; 886 VHOST_LOG_CONFIG(WARNING, "(%s) some packets maybe resent for Tx and dropped for Rx\n", 887 dev->ifname); 888 } 889 890 vq->access_ok = true; 891 892 VHOST_LOG_CONFIG(DEBUG, "(%s) mapped address desc: %p\n", dev->ifname, vq->desc); 893 VHOST_LOG_CONFIG(DEBUG, "(%s) mapped address avail: %p\n", dev->ifname, vq->avail); 894 VHOST_LOG_CONFIG(DEBUG, "(%s) mapped address used: %p\n", dev->ifname, vq->used); 895 VHOST_LOG_CONFIG(DEBUG, "(%s) log_guest_addr: %" PRIx64 "\n", 896 dev->ifname, vq->log_guest_addr); 897 898 return dev; 899 } 900 901 /* 902 * The virtio device sends us the desc, used and avail ring addresses. 903 * This function then converts these to our address space. 904 */ 905 static int 906 vhost_user_set_vring_addr(struct virtio_net **pdev, 907 struct vhu_msg_context *ctx, 908 int main_fd __rte_unused) 909 { 910 struct virtio_net *dev = *pdev; 911 struct vhost_virtqueue *vq; 912 struct vhost_vring_addr *addr = &ctx->msg.payload.addr; 913 bool access_ok; 914 915 if (validate_msg_fds(dev, ctx, 0) != 0) 916 return RTE_VHOST_MSG_RESULT_ERR; 917 918 if (dev->mem == NULL) 919 return RTE_VHOST_MSG_RESULT_ERR; 920 921 /* addr->index refers to the queue index. The txq 1, rxq is 0. */ 922 vq = dev->virtqueue[ctx->msg.payload.addr.index]; 923 924 access_ok = vq->access_ok; 925 926 /* 927 * Rings addresses should not be interpreted as long as the ring is not 928 * started and enabled 929 */ 930 memcpy(&vq->ring_addrs, addr, sizeof(*addr)); 931 932 vring_invalidate(dev, vq); 933 934 if ((vq->enabled && (dev->features & 935 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) || 936 access_ok) { 937 dev = translate_ring_addresses(dev, ctx->msg.payload.addr.index); 938 if (!dev) 939 return RTE_VHOST_MSG_RESULT_ERR; 940 941 *pdev = dev; 942 } 943 944 return RTE_VHOST_MSG_RESULT_OK; 945 } 946 947 /* 948 * The virtio device sends us the available ring last used index. 949 */ 950 static int 951 vhost_user_set_vring_base(struct virtio_net **pdev, 952 struct vhu_msg_context *ctx, 953 int main_fd __rte_unused) 954 { 955 struct virtio_net *dev = *pdev; 956 struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; 957 uint64_t val = ctx->msg.payload.state.num; 958 959 if (validate_msg_fds(dev, ctx, 0) != 0) 960 return RTE_VHOST_MSG_RESULT_ERR; 961 962 if (vq_is_packed(dev)) { 963 /* 964 * Bit[0:14]: avail index 965 * Bit[15]: avail wrap counter 966 */ 967 vq->last_avail_idx = val & 0x7fff; 968 vq->avail_wrap_counter = !!(val & (0x1 << 15)); 969 /* 970 * Set used index to same value as available one, as 971 * their values should be the same since ring processing 972 * was stopped at get time. 973 */ 974 vq->last_used_idx = vq->last_avail_idx; 975 vq->used_wrap_counter = vq->avail_wrap_counter; 976 } else { 977 vq->last_used_idx = ctx->msg.payload.state.num; 978 vq->last_avail_idx = ctx->msg.payload.state.num; 979 } 980 981 VHOST_LOG_CONFIG(INFO, 982 "(%s) vring base idx:%u last_used_idx:%u last_avail_idx:%u.\n", 983 dev->ifname, ctx->msg.payload.state.index, vq->last_used_idx, 984 vq->last_avail_idx); 985 986 return RTE_VHOST_MSG_RESULT_OK; 987 } 988 989 static int 990 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr, 991 uint64_t host_phys_addr, uint64_t size) 992 { 993 struct guest_page *page, *last_page; 994 struct guest_page *old_pages; 995 996 if (dev->nr_guest_pages == dev->max_guest_pages) { 997 dev->max_guest_pages *= 2; 998 old_pages = dev->guest_pages; 999 dev->guest_pages = rte_realloc(dev->guest_pages, 1000 dev->max_guest_pages * sizeof(*page), 1001 RTE_CACHE_LINE_SIZE); 1002 if (dev->guest_pages == NULL) { 1003 VHOST_LOG_CONFIG(ERR, "(%s) cannot realloc guest_pages\n", dev->ifname); 1004 rte_free(old_pages); 1005 return -1; 1006 } 1007 } 1008 1009 if (dev->nr_guest_pages > 0) { 1010 last_page = &dev->guest_pages[dev->nr_guest_pages - 1]; 1011 /* merge if the two pages are continuous */ 1012 if (host_phys_addr == last_page->host_phys_addr + 1013 last_page->size) { 1014 last_page->size += size; 1015 return 0; 1016 } 1017 } 1018 1019 page = &dev->guest_pages[dev->nr_guest_pages++]; 1020 page->guest_phys_addr = guest_phys_addr; 1021 page->host_phys_addr = host_phys_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_phys_addr; 1035 uint64_t size; 1036 1037 host_phys_addr = 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_phys_addr, size) < 0) 1042 return -1; 1043 1044 host_user_addr += size; 1045 guest_phys_addr += size; 1046 reg_size -= size; 1047 1048 while (reg_size > 0) { 1049 size = RTE_MIN(reg_size, page_size); 1050 host_phys_addr = rte_mem_virt2iova((void *)(uintptr_t) 1051 host_user_addr); 1052 if (add_one_guest_page(dev, guest_phys_addr, host_phys_addr, 1053 size) < 0) 1054 return -1; 1055 1056 host_user_addr += size; 1057 guest_phys_addr += size; 1058 reg_size -= size; 1059 } 1060 1061 /* sort guest page array if over binary search threshold */ 1062 if (dev->nr_guest_pages >= VHOST_BINARY_SEARCH_THRESH) { 1063 qsort((void *)dev->guest_pages, dev->nr_guest_pages, 1064 sizeof(struct guest_page), guest_page_addrcmp); 1065 } 1066 1067 return 0; 1068 } 1069 1070 #ifdef RTE_LIBRTE_VHOST_DEBUG 1071 /* TODO: enable it only in debug mode? */ 1072 static void 1073 dump_guest_pages(struct virtio_net *dev) 1074 { 1075 uint32_t i; 1076 struct guest_page *page; 1077 1078 for (i = 0; i < dev->nr_guest_pages; i++) { 1079 page = &dev->guest_pages[i]; 1080 1081 VHOST_LOG_CONFIG(INFO, "(%s) guest physical page region %u\n", 1082 dev->ifname, i); 1083 VHOST_LOG_CONFIG(INFO, "(%s)\tguest_phys_addr: %" PRIx64 "\n", 1084 dev->ifname, page->guest_phys_addr); 1085 VHOST_LOG_CONFIG(INFO, "(%s)\thost_phys_addr : %" PRIx64 "\n", 1086 dev->ifname, page->host_phys_addr); 1087 VHOST_LOG_CONFIG(INFO, "(%s)\tsize : %" PRIx64 "\n", 1088 dev->ifname, page->size); 1089 } 1090 } 1091 #else 1092 #define dump_guest_pages(dev) 1093 #endif 1094 1095 static bool 1096 vhost_memory_changed(struct VhostUserMemory *new, 1097 struct rte_vhost_memory *old) 1098 { 1099 uint32_t i; 1100 1101 if (new->nregions != old->nregions) 1102 return true; 1103 1104 for (i = 0; i < new->nregions; ++i) { 1105 VhostUserMemoryRegion *new_r = &new->regions[i]; 1106 struct rte_vhost_mem_region *old_r = &old->regions[i]; 1107 1108 if (new_r->guest_phys_addr != old_r->guest_phys_addr) 1109 return true; 1110 if (new_r->memory_size != old_r->size) 1111 return true; 1112 if (new_r->userspace_addr != old_r->guest_user_addr) 1113 return true; 1114 } 1115 1116 return false; 1117 } 1118 1119 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 1120 static int 1121 vhost_user_postcopy_region_register(struct virtio_net *dev, 1122 struct rte_vhost_mem_region *reg) 1123 { 1124 struct uffdio_register reg_struct; 1125 1126 /* 1127 * Let's register all the mmapped area to ensure 1128 * alignment on page boundary. 1129 */ 1130 reg_struct.range.start = (uint64_t)(uintptr_t)reg->mmap_addr; 1131 reg_struct.range.len = reg->mmap_size; 1132 reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING; 1133 1134 if (ioctl(dev->postcopy_ufd, UFFDIO_REGISTER, 1135 ®_struct)) { 1136 VHOST_LOG_CONFIG(ERR, "(%s) failed to register ufd for region " 1137 "%" PRIx64 " - %" PRIx64 " (ufd = %d) %s\n", 1138 dev->ifname, 1139 (uint64_t)reg_struct.range.start, 1140 (uint64_t)reg_struct.range.start + 1141 (uint64_t)reg_struct.range.len - 1, 1142 dev->postcopy_ufd, 1143 strerror(errno)); 1144 return -1; 1145 } 1146 1147 VHOST_LOG_CONFIG(INFO, 1148 "(%s)\t userfaultfd registered for range : %" PRIx64 " - %" PRIx64 "\n", 1149 dev->ifname, 1150 (uint64_t)reg_struct.range.start, 1151 (uint64_t)reg_struct.range.start + 1152 (uint64_t)reg_struct.range.len - 1); 1153 1154 return 0; 1155 } 1156 #else 1157 static int 1158 vhost_user_postcopy_region_register(struct virtio_net *dev __rte_unused, 1159 struct rte_vhost_mem_region *reg __rte_unused) 1160 { 1161 return -1; 1162 } 1163 #endif 1164 1165 static int 1166 vhost_user_postcopy_register(struct virtio_net *dev, int main_fd, 1167 struct vhu_msg_context *ctx) 1168 { 1169 struct VhostUserMemory *memory; 1170 struct rte_vhost_mem_region *reg; 1171 struct vhu_msg_context ack_ctx; 1172 uint32_t i; 1173 1174 if (!dev->postcopy_listening) 1175 return 0; 1176 1177 /* 1178 * We haven't a better way right now than sharing 1179 * DPDK's virtual address with Qemu, so that Qemu can 1180 * retrieve the region offset when handling userfaults. 1181 */ 1182 memory = &ctx->msg.payload.memory; 1183 for (i = 0; i < memory->nregions; i++) { 1184 reg = &dev->mem->regions[i]; 1185 memory->regions[i].userspace_addr = reg->host_user_addr; 1186 } 1187 1188 /* Send the addresses back to qemu */ 1189 ctx->fd_num = 0; 1190 send_vhost_reply(dev, main_fd, ctx); 1191 1192 /* Wait for qemu to acknowledge it got the addresses 1193 * we've got to wait before we're allowed to generate faults. 1194 */ 1195 if (read_vhost_message(dev, main_fd, &ack_ctx) <= 0) { 1196 VHOST_LOG_CONFIG(ERR, "(%s) failed to read qemu ack on postcopy set-mem-table\n", 1197 dev->ifname); 1198 return -1; 1199 } 1200 1201 if (validate_msg_fds(dev, &ack_ctx, 0) != 0) 1202 return -1; 1203 1204 if (ack_ctx.msg.request.master != VHOST_USER_SET_MEM_TABLE) { 1205 VHOST_LOG_CONFIG(ERR, "(%s) bad qemu ack on postcopy set-mem-table (%d)\n", 1206 dev->ifname, ack_ctx.msg.request.master); 1207 return -1; 1208 } 1209 1210 /* Now userfault register and we can use the memory */ 1211 for (i = 0; i < memory->nregions; i++) { 1212 reg = &dev->mem->regions[i]; 1213 if (vhost_user_postcopy_region_register(dev, reg) < 0) 1214 return -1; 1215 } 1216 1217 return 0; 1218 } 1219 1220 static int 1221 vhost_user_mmap_region(struct virtio_net *dev, 1222 struct rte_vhost_mem_region *region, 1223 uint64_t mmap_offset) 1224 { 1225 void *mmap_addr; 1226 uint64_t mmap_size; 1227 uint64_t alignment; 1228 int populate; 1229 int ret; 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 if (rte_vfio_is_enabled("vfio")) { 1288 ret = async_dma_map(dev, region, true); 1289 if (ret) { 1290 VHOST_LOG_CONFIG(ERR, 1291 "(%s) configure IOMMU for DMA engine failed\n", 1292 dev->ifname); 1293 return -1; 1294 } 1295 } 1296 } 1297 1298 VHOST_LOG_CONFIG(INFO, "(%s) guest memory region size: 0x%" PRIx64 "\n", 1299 dev->ifname, region->size); 1300 VHOST_LOG_CONFIG(INFO, "(%s)\t guest physical addr: 0x%" PRIx64 "\n", 1301 dev->ifname, region->guest_phys_addr); 1302 VHOST_LOG_CONFIG(INFO, "(%s)\t guest virtual addr: 0x%" PRIx64 "\n", 1303 dev->ifname, region->guest_user_addr); 1304 VHOST_LOG_CONFIG(INFO, "(%s)\t host virtual addr: 0x%" PRIx64 "\n", 1305 dev->ifname, region->host_user_addr); 1306 VHOST_LOG_CONFIG(INFO, "(%s)\t mmap addr : 0x%" PRIx64 "\n", 1307 dev->ifname, (uint64_t)(uintptr_t)mmap_addr); 1308 VHOST_LOG_CONFIG(INFO, "(%s)\t mmap size : 0x%" PRIx64 "\n", 1309 dev->ifname, mmap_size); 1310 VHOST_LOG_CONFIG(INFO, "(%s)\t mmap align: 0x%" PRIx64 "\n", 1311 dev->ifname, alignment); 1312 VHOST_LOG_CONFIG(INFO, "(%s)\t mmap off : 0x%" PRIx64 "\n", 1313 dev->ifname, mmap_offset); 1314 1315 return 0; 1316 } 1317 1318 static int 1319 vhost_user_set_mem_table(struct virtio_net **pdev, 1320 struct vhu_msg_context *ctx, 1321 int main_fd) 1322 { 1323 struct virtio_net *dev = *pdev; 1324 struct VhostUserMemory *memory = &ctx->msg.payload.memory; 1325 struct rte_vhost_mem_region *reg; 1326 int numa_node = SOCKET_ID_ANY; 1327 uint64_t mmap_offset; 1328 uint32_t i; 1329 bool async_notify = false; 1330 1331 if (validate_msg_fds(dev, ctx, memory->nregions) != 0) 1332 return RTE_VHOST_MSG_RESULT_ERR; 1333 1334 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) { 1335 VHOST_LOG_CONFIG(ERR, "(%s) too many memory regions (%u)\n", 1336 dev->ifname, memory->nregions); 1337 goto close_msg_fds; 1338 } 1339 1340 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) { 1341 VHOST_LOG_CONFIG(INFO, "(%s) memory regions not changed\n", dev->ifname); 1342 1343 close_msg_fds(ctx); 1344 1345 return RTE_VHOST_MSG_RESULT_OK; 1346 } 1347 1348 if (dev->mem) { 1349 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) { 1350 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 1351 1352 if (vdpa_dev && vdpa_dev->ops->dev_close) 1353 vdpa_dev->ops->dev_close(dev->vid); 1354 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; 1355 } 1356 1357 /* notify the vhost application to stop DMA transfers */ 1358 if (dev->async_copy && dev->notify_ops->vring_state_changed) { 1359 for (i = 0; i < dev->nr_vring; i++) { 1360 dev->notify_ops->vring_state_changed(dev->vid, 1361 i, 0); 1362 } 1363 async_notify = true; 1364 } 1365 1366 free_mem_region(dev); 1367 rte_free(dev->mem); 1368 dev->mem = NULL; 1369 } 1370 1371 /* Flush IOTLB cache as previous HVAs are now invalid */ 1372 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 1373 for (i = 0; i < dev->nr_vring; i++) 1374 vhost_user_iotlb_flush_all(dev->virtqueue[i]); 1375 1376 /* 1377 * If VQ 0 has already been allocated, try to allocate on the same 1378 * NUMA node. It can be reallocated later in numa_realloc(). 1379 */ 1380 if (dev->nr_vring > 0) 1381 numa_node = dev->virtqueue[0]->numa_node; 1382 1383 dev->nr_guest_pages = 0; 1384 if (dev->guest_pages == NULL) { 1385 dev->max_guest_pages = 8; 1386 dev->guest_pages = rte_zmalloc_socket(NULL, 1387 dev->max_guest_pages * 1388 sizeof(struct guest_page), 1389 RTE_CACHE_LINE_SIZE, 1390 numa_node); 1391 if (dev->guest_pages == NULL) { 1392 VHOST_LOG_CONFIG(ERR, 1393 "(%s) failed to allocate memory for dev->guest_pages\n", 1394 dev->ifname); 1395 goto close_msg_fds; 1396 } 1397 } 1398 1399 dev->mem = rte_zmalloc_socket("vhost-mem-table", sizeof(struct rte_vhost_memory) + 1400 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0, numa_node); 1401 if (dev->mem == NULL) { 1402 VHOST_LOG_CONFIG(ERR, 1403 "(%s) failed to allocate memory for dev->mem\n", 1404 dev->ifname); 1405 goto free_guest_pages; 1406 } 1407 1408 for (i = 0; i < memory->nregions; i++) { 1409 reg = &dev->mem->regions[i]; 1410 1411 reg->guest_phys_addr = memory->regions[i].guest_phys_addr; 1412 reg->guest_user_addr = memory->regions[i].userspace_addr; 1413 reg->size = memory->regions[i].memory_size; 1414 reg->fd = ctx->fds[i]; 1415 1416 /* 1417 * Assign invalid file descriptor value to avoid double 1418 * closing on error path. 1419 */ 1420 ctx->fds[i] = -1; 1421 1422 mmap_offset = memory->regions[i].mmap_offset; 1423 1424 if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) { 1425 VHOST_LOG_CONFIG(ERR, "(%s) failed to mmap region %u\n", dev->ifname, i); 1426 goto free_mem_table; 1427 } 1428 1429 dev->mem->nregions++; 1430 } 1431 1432 if (vhost_user_postcopy_register(dev, main_fd, ctx) < 0) 1433 goto free_mem_table; 1434 1435 for (i = 0; i < dev->nr_vring; i++) { 1436 struct vhost_virtqueue *vq = dev->virtqueue[i]; 1437 1438 if (!vq) 1439 continue; 1440 1441 if (vq->desc || vq->avail || vq->used) { 1442 /* 1443 * If the memory table got updated, the ring addresses 1444 * need to be translated again as virtual addresses have 1445 * changed. 1446 */ 1447 vring_invalidate(dev, vq); 1448 1449 dev = translate_ring_addresses(dev, i); 1450 if (!dev) { 1451 dev = *pdev; 1452 goto free_mem_table; 1453 } 1454 1455 *pdev = dev; 1456 } 1457 } 1458 1459 dump_guest_pages(dev); 1460 1461 if (async_notify) { 1462 for (i = 0; i < dev->nr_vring; i++) 1463 dev->notify_ops->vring_state_changed(dev->vid, i, 1); 1464 } 1465 1466 return RTE_VHOST_MSG_RESULT_OK; 1467 1468 free_mem_table: 1469 free_mem_region(dev); 1470 rte_free(dev->mem); 1471 dev->mem = NULL; 1472 1473 free_guest_pages: 1474 rte_free(dev->guest_pages); 1475 dev->guest_pages = NULL; 1476 close_msg_fds: 1477 close_msg_fds(ctx); 1478 return RTE_VHOST_MSG_RESULT_ERR; 1479 } 1480 1481 static bool 1482 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq) 1483 { 1484 bool rings_ok; 1485 1486 if (!vq) 1487 return false; 1488 1489 if (vq_is_packed(dev)) 1490 rings_ok = vq->desc_packed && vq->driver_event && 1491 vq->device_event; 1492 else 1493 rings_ok = vq->desc && vq->avail && vq->used; 1494 1495 return rings_ok && 1496 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD && 1497 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD && 1498 vq->enabled; 1499 } 1500 1501 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u 1502 1503 static int 1504 virtio_is_ready(struct virtio_net *dev) 1505 { 1506 struct vhost_virtqueue *vq; 1507 uint32_t i, nr_vring = dev->nr_vring; 1508 1509 if (dev->flags & VIRTIO_DEV_READY) 1510 return 1; 1511 1512 if (!dev->nr_vring) 1513 return 0; 1514 1515 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) { 1516 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY; 1517 1518 if (dev->nr_vring < nr_vring) 1519 return 0; 1520 } 1521 1522 for (i = 0; i < nr_vring; i++) { 1523 vq = dev->virtqueue[i]; 1524 1525 if (!vq_is_ready(dev, vq)) 1526 return 0; 1527 } 1528 1529 /* If supported, ensure the frontend is really done with config */ 1530 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS)) 1531 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)) 1532 return 0; 1533 1534 dev->flags |= VIRTIO_DEV_READY; 1535 1536 if (!(dev->flags & VIRTIO_DEV_RUNNING)) 1537 VHOST_LOG_CONFIG(INFO, "(%s) virtio is now ready for processing.\n", dev->ifname); 1538 return 1; 1539 } 1540 1541 static void * 1542 inflight_mem_alloc(struct virtio_net *dev, const char *name, size_t size, int *fd) 1543 { 1544 void *ptr; 1545 int mfd = -1; 1546 char fname[20] = "/tmp/memfd-XXXXXX"; 1547 1548 *fd = -1; 1549 #ifdef MEMFD_SUPPORTED 1550 mfd = memfd_create(name, MFD_CLOEXEC); 1551 #else 1552 RTE_SET_USED(name); 1553 #endif 1554 if (mfd == -1) { 1555 mfd = mkstemp(fname); 1556 if (mfd == -1) { 1557 VHOST_LOG_CONFIG(ERR, "(%s) failed to get inflight buffer fd\n", 1558 dev->ifname); 1559 return NULL; 1560 } 1561 1562 unlink(fname); 1563 } 1564 1565 if (ftruncate(mfd, size) == -1) { 1566 VHOST_LOG_CONFIG(ERR, "(%s) failed to alloc inflight buffer\n", dev->ifname); 1567 close(mfd); 1568 return NULL; 1569 } 1570 1571 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0); 1572 if (ptr == MAP_FAILED) { 1573 VHOST_LOG_CONFIG(ERR, "(%s) failed to mmap inflight buffer\n", dev->ifname); 1574 close(mfd); 1575 return NULL; 1576 } 1577 1578 *fd = mfd; 1579 return ptr; 1580 } 1581 1582 static uint32_t 1583 get_pervq_shm_size_split(uint16_t queue_size) 1584 { 1585 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) * 1586 queue_size + sizeof(uint64_t) + 1587 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT); 1588 } 1589 1590 static uint32_t 1591 get_pervq_shm_size_packed(uint16_t queue_size) 1592 { 1593 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed) 1594 * queue_size + sizeof(uint64_t) + 1595 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9, 1596 INFLIGHT_ALIGNMENT); 1597 } 1598 1599 static int 1600 vhost_user_get_inflight_fd(struct virtio_net **pdev, 1601 struct vhu_msg_context *ctx, 1602 int main_fd __rte_unused) 1603 { 1604 struct rte_vhost_inflight_info_packed *inflight_packed; 1605 uint64_t pervq_inflight_size, mmap_size; 1606 uint16_t num_queues, queue_size; 1607 struct virtio_net *dev = *pdev; 1608 int fd, i, j; 1609 int numa_node = SOCKET_ID_ANY; 1610 void *addr; 1611 1612 if (ctx->msg.size != sizeof(ctx->msg.payload.inflight)) { 1613 VHOST_LOG_CONFIG(ERR, "(%s) invalid get_inflight_fd message size is %d\n", 1614 dev->ifname, ctx->msg.size); 1615 return RTE_VHOST_MSG_RESULT_ERR; 1616 } 1617 1618 /* 1619 * If VQ 0 has already been allocated, try to allocate on the same 1620 * NUMA node. It can be reallocated later in numa_realloc(). 1621 */ 1622 if (dev->nr_vring > 0) 1623 numa_node = dev->virtqueue[0]->numa_node; 1624 1625 if (dev->inflight_info == NULL) { 1626 dev->inflight_info = rte_zmalloc_socket("inflight_info", 1627 sizeof(struct inflight_mem_info), 0, numa_node); 1628 if (!dev->inflight_info) { 1629 VHOST_LOG_CONFIG(ERR, "(%s) failed to alloc dev inflight area\n", 1630 dev->ifname); 1631 return RTE_VHOST_MSG_RESULT_ERR; 1632 } 1633 dev->inflight_info->fd = -1; 1634 } 1635 1636 num_queues = ctx->msg.payload.inflight.num_queues; 1637 queue_size = ctx->msg.payload.inflight.queue_size; 1638 1639 VHOST_LOG_CONFIG(INFO, "(%s) get_inflight_fd num_queues: %u\n", 1640 dev->ifname, ctx->msg.payload.inflight.num_queues); 1641 VHOST_LOG_CONFIG(INFO, "(%s) get_inflight_fd queue_size: %u\n", 1642 dev->ifname, ctx->msg.payload.inflight.queue_size); 1643 1644 if (vq_is_packed(dev)) 1645 pervq_inflight_size = get_pervq_shm_size_packed(queue_size); 1646 else 1647 pervq_inflight_size = get_pervq_shm_size_split(queue_size); 1648 1649 mmap_size = num_queues * pervq_inflight_size; 1650 addr = inflight_mem_alloc(dev, "vhost-inflight", mmap_size, &fd); 1651 if (!addr) { 1652 VHOST_LOG_CONFIG(ERR, "(%s) failed to alloc vhost inflight area\n", dev->ifname); 1653 ctx->msg.payload.inflight.mmap_size = 0; 1654 return RTE_VHOST_MSG_RESULT_ERR; 1655 } 1656 memset(addr, 0, mmap_size); 1657 1658 if (dev->inflight_info->addr) { 1659 munmap(dev->inflight_info->addr, dev->inflight_info->size); 1660 dev->inflight_info->addr = NULL; 1661 } 1662 1663 if (dev->inflight_info->fd >= 0) { 1664 close(dev->inflight_info->fd); 1665 dev->inflight_info->fd = -1; 1666 } 1667 1668 dev->inflight_info->addr = addr; 1669 dev->inflight_info->size = ctx->msg.payload.inflight.mmap_size = mmap_size; 1670 dev->inflight_info->fd = ctx->fds[0] = fd; 1671 ctx->msg.payload.inflight.mmap_offset = 0; 1672 ctx->fd_num = 1; 1673 1674 if (vq_is_packed(dev)) { 1675 for (i = 0; i < num_queues; i++) { 1676 inflight_packed = 1677 (struct rte_vhost_inflight_info_packed *)addr; 1678 inflight_packed->used_wrap_counter = 1; 1679 inflight_packed->old_used_wrap_counter = 1; 1680 for (j = 0; j < queue_size; j++) 1681 inflight_packed->desc[j].next = j + 1; 1682 addr = (void *)((char *)addr + pervq_inflight_size); 1683 } 1684 } 1685 1686 VHOST_LOG_CONFIG(INFO, "(%s) send inflight mmap_size: %"PRIu64"\n", 1687 dev->ifname, ctx->msg.payload.inflight.mmap_size); 1688 VHOST_LOG_CONFIG(INFO, "(%s) send inflight mmap_offset: %"PRIu64"\n", 1689 dev->ifname, ctx->msg.payload.inflight.mmap_offset); 1690 VHOST_LOG_CONFIG(INFO, "(%s) send inflight fd: %d\n", dev->ifname, ctx->fds[0]); 1691 1692 return RTE_VHOST_MSG_RESULT_REPLY; 1693 } 1694 1695 static int 1696 vhost_user_set_inflight_fd(struct virtio_net **pdev, 1697 struct vhu_msg_context *ctx, 1698 int main_fd __rte_unused) 1699 { 1700 uint64_t mmap_size, mmap_offset; 1701 uint16_t num_queues, queue_size; 1702 struct virtio_net *dev = *pdev; 1703 uint32_t pervq_inflight_size; 1704 struct vhost_virtqueue *vq; 1705 void *addr; 1706 int fd, i; 1707 int numa_node = SOCKET_ID_ANY; 1708 1709 fd = ctx->fds[0]; 1710 if (ctx->msg.size != sizeof(ctx->msg.payload.inflight) || fd < 0) { 1711 VHOST_LOG_CONFIG(ERR, "(%s) invalid set_inflight_fd message size is %d,fd is %d\n", 1712 dev->ifname, ctx->msg.size, fd); 1713 return RTE_VHOST_MSG_RESULT_ERR; 1714 } 1715 1716 mmap_size = ctx->msg.payload.inflight.mmap_size; 1717 mmap_offset = ctx->msg.payload.inflight.mmap_offset; 1718 num_queues = ctx->msg.payload.inflight.num_queues; 1719 queue_size = ctx->msg.payload.inflight.queue_size; 1720 1721 if (vq_is_packed(dev)) 1722 pervq_inflight_size = get_pervq_shm_size_packed(queue_size); 1723 else 1724 pervq_inflight_size = get_pervq_shm_size_split(queue_size); 1725 1726 VHOST_LOG_CONFIG(INFO, "(%s) set_inflight_fd mmap_size: %"PRIu64"\n", 1727 dev->ifname, mmap_size); 1728 VHOST_LOG_CONFIG(INFO, "(%s) set_inflight_fd mmap_offset: %"PRIu64"\n", 1729 dev->ifname, mmap_offset); 1730 VHOST_LOG_CONFIG(INFO, "(%s) set_inflight_fd num_queues: %u\n", dev->ifname, num_queues); 1731 VHOST_LOG_CONFIG(INFO, "(%s) set_inflight_fd queue_size: %u\n", dev->ifname, queue_size); 1732 VHOST_LOG_CONFIG(INFO, "(%s) set_inflight_fd fd: %d\n", dev->ifname, fd); 1733 VHOST_LOG_CONFIG(INFO, "(%s) set_inflight_fd pervq_inflight_size: %d\n", 1734 dev->ifname, pervq_inflight_size); 1735 1736 /* 1737 * If VQ 0 has already been allocated, try to allocate on the same 1738 * NUMA node. It can be reallocated later in numa_realloc(). 1739 */ 1740 if (dev->nr_vring > 0) 1741 numa_node = dev->virtqueue[0]->numa_node; 1742 1743 if (!dev->inflight_info) { 1744 dev->inflight_info = rte_zmalloc_socket("inflight_info", 1745 sizeof(struct inflight_mem_info), 0, numa_node); 1746 if (dev->inflight_info == NULL) { 1747 VHOST_LOG_CONFIG(ERR, "(%s) failed to alloc dev inflight area\n", 1748 dev->ifname); 1749 return RTE_VHOST_MSG_RESULT_ERR; 1750 } 1751 dev->inflight_info->fd = -1; 1752 } 1753 1754 if (dev->inflight_info->addr) { 1755 munmap(dev->inflight_info->addr, dev->inflight_info->size); 1756 dev->inflight_info->addr = NULL; 1757 } 1758 1759 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, 1760 fd, mmap_offset); 1761 if (addr == MAP_FAILED) { 1762 VHOST_LOG_CONFIG(ERR, "(%s) failed to mmap share memory.\n", dev->ifname); 1763 return RTE_VHOST_MSG_RESULT_ERR; 1764 } 1765 1766 if (dev->inflight_info->fd >= 0) { 1767 close(dev->inflight_info->fd); 1768 dev->inflight_info->fd = -1; 1769 } 1770 1771 dev->inflight_info->fd = fd; 1772 dev->inflight_info->addr = addr; 1773 dev->inflight_info->size = mmap_size; 1774 1775 for (i = 0; i < num_queues; i++) { 1776 vq = dev->virtqueue[i]; 1777 if (!vq) 1778 continue; 1779 1780 if (vq_is_packed(dev)) { 1781 vq->inflight_packed = addr; 1782 vq->inflight_packed->desc_num = queue_size; 1783 } else { 1784 vq->inflight_split = addr; 1785 vq->inflight_split->desc_num = queue_size; 1786 } 1787 addr = (void *)((char *)addr + pervq_inflight_size); 1788 } 1789 1790 return RTE_VHOST_MSG_RESULT_OK; 1791 } 1792 1793 static int 1794 vhost_user_set_vring_call(struct virtio_net **pdev, 1795 struct vhu_msg_context *ctx, 1796 int main_fd __rte_unused) 1797 { 1798 struct virtio_net *dev = *pdev; 1799 struct vhost_vring_file file; 1800 struct vhost_virtqueue *vq; 1801 int expected_fds; 1802 1803 expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1804 if (validate_msg_fds(dev, ctx, expected_fds) != 0) 1805 return RTE_VHOST_MSG_RESULT_ERR; 1806 1807 file.index = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 1808 if (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) 1809 file.fd = VIRTIO_INVALID_EVENTFD; 1810 else 1811 file.fd = ctx->fds[0]; 1812 VHOST_LOG_CONFIG(INFO, "(%s) vring call idx:%d file:%d\n", 1813 dev->ifname, file.index, file.fd); 1814 1815 vq = dev->virtqueue[file.index]; 1816 1817 if (vq->ready) { 1818 vq->ready = false; 1819 vhost_user_notify_queue_state(dev, file.index, 0); 1820 } 1821 1822 if (vq->callfd >= 0) 1823 close(vq->callfd); 1824 1825 vq->callfd = file.fd; 1826 1827 return RTE_VHOST_MSG_RESULT_OK; 1828 } 1829 1830 static int vhost_user_set_vring_err(struct virtio_net **pdev, 1831 struct vhu_msg_context *ctx, 1832 int main_fd __rte_unused) 1833 { 1834 struct virtio_net *dev = *pdev; 1835 int expected_fds; 1836 1837 expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1838 if (validate_msg_fds(dev, ctx, expected_fds) != 0) 1839 return RTE_VHOST_MSG_RESULT_ERR; 1840 1841 if (!(ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK)) 1842 close(ctx->fds[0]); 1843 VHOST_LOG_CONFIG(INFO, "(%s) not implemented\n", dev->ifname); 1844 1845 return RTE_VHOST_MSG_RESULT_OK; 1846 } 1847 1848 static int 1849 resubmit_desc_compare(const void *a, const void *b) 1850 { 1851 const struct rte_vhost_resubmit_desc *desc0 = a; 1852 const struct rte_vhost_resubmit_desc *desc1 = b; 1853 1854 if (desc1->counter > desc0->counter) 1855 return 1; 1856 1857 return -1; 1858 } 1859 1860 static int 1861 vhost_check_queue_inflights_split(struct virtio_net *dev, 1862 struct vhost_virtqueue *vq) 1863 { 1864 uint16_t i; 1865 uint16_t resubmit_num = 0, last_io, num; 1866 struct vring_used *used = vq->used; 1867 struct rte_vhost_resubmit_info *resubmit; 1868 struct rte_vhost_inflight_info_split *inflight_split; 1869 1870 if (!(dev->protocol_features & 1871 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) 1872 return RTE_VHOST_MSG_RESULT_OK; 1873 1874 /* The frontend may still not support the inflight feature 1875 * although we negotiate the protocol feature. 1876 */ 1877 if ((!vq->inflight_split)) 1878 return RTE_VHOST_MSG_RESULT_OK; 1879 1880 if (!vq->inflight_split->version) { 1881 vq->inflight_split->version = INFLIGHT_VERSION; 1882 return RTE_VHOST_MSG_RESULT_OK; 1883 } 1884 1885 if (vq->resubmit_inflight) 1886 return RTE_VHOST_MSG_RESULT_OK; 1887 1888 inflight_split = vq->inflight_split; 1889 vq->global_counter = 0; 1890 last_io = inflight_split->last_inflight_io; 1891 1892 if (inflight_split->used_idx != used->idx) { 1893 inflight_split->desc[last_io].inflight = 0; 1894 rte_atomic_thread_fence(__ATOMIC_SEQ_CST); 1895 inflight_split->used_idx = used->idx; 1896 } 1897 1898 for (i = 0; i < inflight_split->desc_num; i++) { 1899 if (inflight_split->desc[i].inflight == 1) 1900 resubmit_num++; 1901 } 1902 1903 vq->last_avail_idx += resubmit_num; 1904 1905 if (resubmit_num) { 1906 resubmit = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 1907 0, vq->numa_node); 1908 if (!resubmit) { 1909 VHOST_LOG_CONFIG(ERR, 1910 "(%s) failed to allocate memory for resubmit info.\n", 1911 dev->ifname); 1912 return RTE_VHOST_MSG_RESULT_ERR; 1913 } 1914 1915 resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", 1916 resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 1917 0, vq->numa_node); 1918 if (!resubmit->resubmit_list) { 1919 VHOST_LOG_CONFIG(ERR, 1920 "(%s) failed to allocate memory for inflight desc.\n", 1921 dev->ifname); 1922 rte_free(resubmit); 1923 return RTE_VHOST_MSG_RESULT_ERR; 1924 } 1925 1926 num = 0; 1927 for (i = 0; i < vq->inflight_split->desc_num; i++) { 1928 if (vq->inflight_split->desc[i].inflight == 1) { 1929 resubmit->resubmit_list[num].index = i; 1930 resubmit->resubmit_list[num].counter = 1931 inflight_split->desc[i].counter; 1932 num++; 1933 } 1934 } 1935 resubmit->resubmit_num = num; 1936 1937 if (resubmit->resubmit_num > 1) 1938 qsort(resubmit->resubmit_list, resubmit->resubmit_num, 1939 sizeof(struct rte_vhost_resubmit_desc), 1940 resubmit_desc_compare); 1941 1942 vq->global_counter = resubmit->resubmit_list[0].counter + 1; 1943 vq->resubmit_inflight = resubmit; 1944 } 1945 1946 return RTE_VHOST_MSG_RESULT_OK; 1947 } 1948 1949 static int 1950 vhost_check_queue_inflights_packed(struct virtio_net *dev, 1951 struct vhost_virtqueue *vq) 1952 { 1953 uint16_t i; 1954 uint16_t resubmit_num = 0, old_used_idx, num; 1955 struct rte_vhost_resubmit_info *resubmit; 1956 struct rte_vhost_inflight_info_packed *inflight_packed; 1957 1958 if (!(dev->protocol_features & 1959 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) 1960 return RTE_VHOST_MSG_RESULT_OK; 1961 1962 /* The frontend may still not support the inflight feature 1963 * although we negotiate the protocol feature. 1964 */ 1965 if ((!vq->inflight_packed)) 1966 return RTE_VHOST_MSG_RESULT_OK; 1967 1968 if (!vq->inflight_packed->version) { 1969 vq->inflight_packed->version = INFLIGHT_VERSION; 1970 return RTE_VHOST_MSG_RESULT_OK; 1971 } 1972 1973 if (vq->resubmit_inflight) 1974 return RTE_VHOST_MSG_RESULT_OK; 1975 1976 inflight_packed = vq->inflight_packed; 1977 vq->global_counter = 0; 1978 old_used_idx = inflight_packed->old_used_idx; 1979 1980 if (inflight_packed->used_idx != old_used_idx) { 1981 if (inflight_packed->desc[old_used_idx].inflight == 0) { 1982 inflight_packed->old_used_idx = 1983 inflight_packed->used_idx; 1984 inflight_packed->old_used_wrap_counter = 1985 inflight_packed->used_wrap_counter; 1986 inflight_packed->old_free_head = 1987 inflight_packed->free_head; 1988 } else { 1989 inflight_packed->used_idx = 1990 inflight_packed->old_used_idx; 1991 inflight_packed->used_wrap_counter = 1992 inflight_packed->old_used_wrap_counter; 1993 inflight_packed->free_head = 1994 inflight_packed->old_free_head; 1995 } 1996 } 1997 1998 for (i = 0; i < inflight_packed->desc_num; i++) { 1999 if (inflight_packed->desc[i].inflight == 1) 2000 resubmit_num++; 2001 } 2002 2003 if (resubmit_num) { 2004 resubmit = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 2005 0, vq->numa_node); 2006 if (resubmit == NULL) { 2007 VHOST_LOG_CONFIG(ERR, 2008 "(%s) failed to allocate memory for resubmit info.\n", 2009 dev->ifname); 2010 return RTE_VHOST_MSG_RESULT_ERR; 2011 } 2012 2013 resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", 2014 resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 2015 0, vq->numa_node); 2016 if (resubmit->resubmit_list == NULL) { 2017 VHOST_LOG_CONFIG(ERR, 2018 "(%s) failed to allocate memory for resubmit desc.\n", 2019 dev->ifname); 2020 rte_free(resubmit); 2021 return RTE_VHOST_MSG_RESULT_ERR; 2022 } 2023 2024 num = 0; 2025 for (i = 0; i < inflight_packed->desc_num; i++) { 2026 if (vq->inflight_packed->desc[i].inflight == 1) { 2027 resubmit->resubmit_list[num].index = i; 2028 resubmit->resubmit_list[num].counter = 2029 inflight_packed->desc[i].counter; 2030 num++; 2031 } 2032 } 2033 resubmit->resubmit_num = num; 2034 2035 if (resubmit->resubmit_num > 1) 2036 qsort(resubmit->resubmit_list, resubmit->resubmit_num, 2037 sizeof(struct rte_vhost_resubmit_desc), 2038 resubmit_desc_compare); 2039 2040 vq->global_counter = resubmit->resubmit_list[0].counter + 1; 2041 vq->resubmit_inflight = resubmit; 2042 } 2043 2044 return RTE_VHOST_MSG_RESULT_OK; 2045 } 2046 2047 static int 2048 vhost_user_set_vring_kick(struct virtio_net **pdev, 2049 struct vhu_msg_context *ctx, 2050 int main_fd __rte_unused) 2051 { 2052 struct virtio_net *dev = *pdev; 2053 struct vhost_vring_file file; 2054 struct vhost_virtqueue *vq; 2055 int expected_fds; 2056 2057 expected_fds = (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 2058 if (validate_msg_fds(dev, ctx, expected_fds) != 0) 2059 return RTE_VHOST_MSG_RESULT_ERR; 2060 2061 file.index = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 2062 if (ctx->msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK) 2063 file.fd = VIRTIO_INVALID_EVENTFD; 2064 else 2065 file.fd = ctx->fds[0]; 2066 VHOST_LOG_CONFIG(INFO, "(%s) vring kick idx:%d file:%d\n", 2067 dev->ifname, file.index, file.fd); 2068 2069 /* Interpret ring addresses only when ring is started. */ 2070 dev = translate_ring_addresses(dev, file.index); 2071 if (!dev) { 2072 if (file.fd != VIRTIO_INVALID_EVENTFD) 2073 close(file.fd); 2074 2075 return RTE_VHOST_MSG_RESULT_ERR; 2076 } 2077 2078 *pdev = dev; 2079 2080 vq = dev->virtqueue[file.index]; 2081 2082 /* 2083 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated, 2084 * the ring starts already enabled. Otherwise, it is enabled via 2085 * the SET_VRING_ENABLE message. 2086 */ 2087 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) { 2088 vq->enabled = true; 2089 } 2090 2091 if (vq->ready) { 2092 vq->ready = false; 2093 vhost_user_notify_queue_state(dev, file.index, 0); 2094 } 2095 2096 if (vq->kickfd >= 0) 2097 close(vq->kickfd); 2098 vq->kickfd = file.fd; 2099 2100 if (vq_is_packed(dev)) { 2101 if (vhost_check_queue_inflights_packed(dev, vq)) { 2102 VHOST_LOG_CONFIG(ERR, "(%s) failed to inflights for vq: %d\n", 2103 dev->ifname, file.index); 2104 return RTE_VHOST_MSG_RESULT_ERR; 2105 } 2106 } else { 2107 if (vhost_check_queue_inflights_split(dev, vq)) { 2108 VHOST_LOG_CONFIG(ERR, "(%s) failed to inflights for vq: %d\n", 2109 dev->ifname, file.index); 2110 return RTE_VHOST_MSG_RESULT_ERR; 2111 } 2112 } 2113 2114 return RTE_VHOST_MSG_RESULT_OK; 2115 } 2116 2117 /* 2118 * when virtio is stopped, qemu will send us the GET_VRING_BASE message. 2119 */ 2120 static int 2121 vhost_user_get_vring_base(struct virtio_net **pdev, 2122 struct vhu_msg_context *ctx, 2123 int main_fd __rte_unused) 2124 { 2125 struct virtio_net *dev = *pdev; 2126 struct vhost_virtqueue *vq = dev->virtqueue[ctx->msg.payload.state.index]; 2127 uint64_t val; 2128 2129 if (validate_msg_fds(dev, ctx, 0) != 0) 2130 return RTE_VHOST_MSG_RESULT_ERR; 2131 2132 /* We have to stop the queue (virtio) if it is running. */ 2133 vhost_destroy_device_notify(dev); 2134 2135 dev->flags &= ~VIRTIO_DEV_READY; 2136 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; 2137 2138 /* Here we are safe to get the indexes */ 2139 if (vq_is_packed(dev)) { 2140 /* 2141 * Bit[0:14]: avail index 2142 * Bit[15]: avail wrap counter 2143 */ 2144 val = vq->last_avail_idx & 0x7fff; 2145 val |= vq->avail_wrap_counter << 15; 2146 ctx->msg.payload.state.num = val; 2147 } else { 2148 ctx->msg.payload.state.num = vq->last_avail_idx; 2149 } 2150 2151 VHOST_LOG_CONFIG(INFO, "(%s) vring base idx:%d file:%d\n", 2152 dev->ifname, ctx->msg.payload.state.index, 2153 ctx->msg.payload.state.num); 2154 /* 2155 * Based on current qemu vhost-user implementation, this message is 2156 * sent and only sent in vhost_vring_stop. 2157 * TODO: cleanup the vring, it isn't usable since here. 2158 */ 2159 if (vq->kickfd >= 0) 2160 close(vq->kickfd); 2161 2162 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD; 2163 2164 if (vq->callfd >= 0) 2165 close(vq->callfd); 2166 2167 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD; 2168 2169 vq->signalled_used_valid = false; 2170 2171 if (vq_is_packed(dev)) { 2172 rte_free(vq->shadow_used_packed); 2173 vq->shadow_used_packed = NULL; 2174 } else { 2175 rte_free(vq->shadow_used_split); 2176 vq->shadow_used_split = NULL; 2177 } 2178 2179 rte_free(vq->batch_copy_elems); 2180 vq->batch_copy_elems = NULL; 2181 2182 rte_free(vq->log_cache); 2183 vq->log_cache = NULL; 2184 2185 ctx->msg.size = sizeof(ctx->msg.payload.state); 2186 ctx->fd_num = 0; 2187 2188 vhost_user_iotlb_flush_all(vq); 2189 2190 vring_invalidate(dev, vq); 2191 2192 return RTE_VHOST_MSG_RESULT_REPLY; 2193 } 2194 2195 /* 2196 * when virtio queues are ready to work, qemu will send us to 2197 * enable the virtio queue pair. 2198 */ 2199 static int 2200 vhost_user_set_vring_enable(struct virtio_net **pdev, 2201 struct vhu_msg_context *ctx, 2202 int main_fd __rte_unused) 2203 { 2204 struct virtio_net *dev = *pdev; 2205 bool enable = !!ctx->msg.payload.state.num; 2206 int index = (int)ctx->msg.payload.state.index; 2207 2208 if (validate_msg_fds(dev, ctx, 0) != 0) 2209 return RTE_VHOST_MSG_RESULT_ERR; 2210 2211 VHOST_LOG_CONFIG(INFO, "(%s) set queue enable: %d to qp idx: %d\n", 2212 dev->ifname, enable, index); 2213 2214 if (enable && dev->virtqueue[index]->async) { 2215 if (dev->virtqueue[index]->async->pkts_inflight_n) { 2216 VHOST_LOG_CONFIG(ERR, 2217 "(%s) failed to enable vring. Inflight packets must be completed first\n", 2218 dev->ifname); 2219 return RTE_VHOST_MSG_RESULT_ERR; 2220 } 2221 } 2222 2223 dev->virtqueue[index]->enabled = enable; 2224 2225 return RTE_VHOST_MSG_RESULT_OK; 2226 } 2227 2228 static int 2229 vhost_user_get_protocol_features(struct virtio_net **pdev, 2230 struct vhu_msg_context *ctx, 2231 int main_fd __rte_unused) 2232 { 2233 struct virtio_net *dev = *pdev; 2234 uint64_t features, protocol_features; 2235 2236 if (validate_msg_fds(dev, ctx, 0) != 0) 2237 return RTE_VHOST_MSG_RESULT_ERR; 2238 2239 rte_vhost_driver_get_features(dev->ifname, &features); 2240 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features); 2241 2242 ctx->msg.payload.u64 = protocol_features; 2243 ctx->msg.size = sizeof(ctx->msg.payload.u64); 2244 ctx->fd_num = 0; 2245 2246 return RTE_VHOST_MSG_RESULT_REPLY; 2247 } 2248 2249 static int 2250 vhost_user_set_protocol_features(struct virtio_net **pdev, 2251 struct vhu_msg_context *ctx, 2252 int main_fd __rte_unused) 2253 { 2254 struct virtio_net *dev = *pdev; 2255 uint64_t protocol_features = ctx->msg.payload.u64; 2256 uint64_t slave_protocol_features = 0; 2257 2258 if (validate_msg_fds(dev, ctx, 0) != 0) 2259 return RTE_VHOST_MSG_RESULT_ERR; 2260 2261 rte_vhost_driver_get_protocol_features(dev->ifname, 2262 &slave_protocol_features); 2263 if (protocol_features & ~slave_protocol_features) { 2264 VHOST_LOG_CONFIG(ERR, "(%s) received invalid protocol features.\n", dev->ifname); 2265 return RTE_VHOST_MSG_RESULT_ERR; 2266 } 2267 2268 dev->protocol_features = protocol_features; 2269 VHOST_LOG_CONFIG(INFO, "(%s) negotiated Vhost-user protocol features: 0x%" PRIx64 "\n", 2270 dev->ifname, dev->protocol_features); 2271 2272 return RTE_VHOST_MSG_RESULT_OK; 2273 } 2274 2275 static int 2276 vhost_user_set_log_base(struct virtio_net **pdev, 2277 struct vhu_msg_context *ctx, 2278 int main_fd __rte_unused) 2279 { 2280 struct virtio_net *dev = *pdev; 2281 int fd = ctx->fds[0]; 2282 uint64_t size, off; 2283 void *addr; 2284 uint32_t i; 2285 2286 if (validate_msg_fds(dev, ctx, 1) != 0) 2287 return RTE_VHOST_MSG_RESULT_ERR; 2288 2289 if (fd < 0) { 2290 VHOST_LOG_CONFIG(ERR, "(%s) invalid log fd: %d\n", dev->ifname, fd); 2291 return RTE_VHOST_MSG_RESULT_ERR; 2292 } 2293 2294 if (ctx->msg.size != sizeof(VhostUserLog)) { 2295 VHOST_LOG_CONFIG(ERR, "(%s) invalid log base msg size: %"PRId32" != %d\n", 2296 dev->ifname, ctx->msg.size, (int)sizeof(VhostUserLog)); 2297 goto close_msg_fds; 2298 } 2299 2300 size = ctx->msg.payload.log.mmap_size; 2301 off = ctx->msg.payload.log.mmap_offset; 2302 2303 /* Check for mmap size and offset overflow. */ 2304 if (off >= -size) { 2305 VHOST_LOG_CONFIG(ERR, 2306 "(%s) log offset %#"PRIx64" and log size %#"PRIx64" overflow\n", 2307 dev->ifname, off, size); 2308 goto close_msg_fds; 2309 } 2310 2311 VHOST_LOG_CONFIG(INFO, "(%s) log mmap size: %"PRId64", offset: %"PRId64"\n", 2312 dev->ifname, size, off); 2313 2314 /* 2315 * mmap from 0 to workaround a hugepage mmap bug: mmap will 2316 * fail when offset is not page size aligned. 2317 */ 2318 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 2319 close(fd); 2320 if (addr == MAP_FAILED) { 2321 VHOST_LOG_CONFIG(ERR, "(%s) mmap log base failed!\n", dev->ifname); 2322 return RTE_VHOST_MSG_RESULT_ERR; 2323 } 2324 2325 /* 2326 * Free previously mapped log memory on occasionally 2327 * multiple VHOST_USER_SET_LOG_BASE. 2328 */ 2329 if (dev->log_addr) { 2330 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size); 2331 } 2332 dev->log_addr = (uint64_t)(uintptr_t)addr; 2333 dev->log_base = dev->log_addr + off; 2334 dev->log_size = size; 2335 2336 for (i = 0; i < dev->nr_vring; i++) { 2337 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2338 2339 rte_free(vq->log_cache); 2340 vq->log_cache = NULL; 2341 vq->log_cache_nb_elem = 0; 2342 vq->log_cache = rte_malloc_socket("vq log cache", 2343 sizeof(struct log_cache_entry) * VHOST_LOG_CACHE_NR, 2344 0, vq->numa_node); 2345 /* 2346 * If log cache alloc fail, don't fail migration, but no 2347 * caching will be done, which will impact performance 2348 */ 2349 if (!vq->log_cache) 2350 VHOST_LOG_CONFIG(ERR, "(%s) failed to allocate VQ logging cache\n", 2351 dev->ifname); 2352 } 2353 2354 /* 2355 * The spec is not clear about it (yet), but QEMU doesn't expect 2356 * any payload in the reply. 2357 */ 2358 ctx->msg.size = 0; 2359 ctx->fd_num = 0; 2360 2361 return RTE_VHOST_MSG_RESULT_REPLY; 2362 2363 close_msg_fds: 2364 close_msg_fds(ctx); 2365 return RTE_VHOST_MSG_RESULT_ERR; 2366 } 2367 2368 static int vhost_user_set_log_fd(struct virtio_net **pdev, 2369 struct vhu_msg_context *ctx, 2370 int main_fd __rte_unused) 2371 { 2372 struct virtio_net *dev = *pdev; 2373 2374 if (validate_msg_fds(dev, ctx, 1) != 0) 2375 return RTE_VHOST_MSG_RESULT_ERR; 2376 2377 close(ctx->fds[0]); 2378 VHOST_LOG_CONFIG(INFO, "(%s) not implemented.\n", dev->ifname); 2379 2380 return RTE_VHOST_MSG_RESULT_OK; 2381 } 2382 2383 /* 2384 * An rarp packet is constructed and broadcasted to notify switches about 2385 * the new location of the migrated VM, so that packets from outside will 2386 * not be lost after migration. 2387 * 2388 * However, we don't actually "send" a rarp packet here, instead, we set 2389 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it. 2390 */ 2391 static int 2392 vhost_user_send_rarp(struct virtio_net **pdev, 2393 struct vhu_msg_context *ctx, 2394 int main_fd __rte_unused) 2395 { 2396 struct virtio_net *dev = *pdev; 2397 uint8_t *mac = (uint8_t *)&ctx->msg.payload.u64; 2398 struct rte_vdpa_device *vdpa_dev; 2399 2400 if (validate_msg_fds(dev, ctx, 0) != 0) 2401 return RTE_VHOST_MSG_RESULT_ERR; 2402 2403 VHOST_LOG_CONFIG(DEBUG, "(%s) MAC: " RTE_ETHER_ADDR_PRT_FMT "\n", 2404 dev->ifname, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 2405 memcpy(dev->mac.addr_bytes, mac, 6); 2406 2407 /* 2408 * Set the flag to inject a RARP broadcast packet at 2409 * rte_vhost_dequeue_burst(). 2410 * 2411 * __ATOMIC_RELEASE ordering is for making sure the mac is 2412 * copied before the flag is set. 2413 */ 2414 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE); 2415 vdpa_dev = dev->vdpa_dev; 2416 if (vdpa_dev && vdpa_dev->ops->migration_done) 2417 vdpa_dev->ops->migration_done(dev->vid); 2418 2419 return RTE_VHOST_MSG_RESULT_OK; 2420 } 2421 2422 static int 2423 vhost_user_net_set_mtu(struct virtio_net **pdev, 2424 struct vhu_msg_context *ctx, 2425 int main_fd __rte_unused) 2426 { 2427 struct virtio_net *dev = *pdev; 2428 2429 if (validate_msg_fds(dev, ctx, 0) != 0) 2430 return RTE_VHOST_MSG_RESULT_ERR; 2431 2432 if (ctx->msg.payload.u64 < VIRTIO_MIN_MTU || 2433 ctx->msg.payload.u64 > VIRTIO_MAX_MTU) { 2434 VHOST_LOG_CONFIG(ERR, "(%s) invalid MTU size (%"PRIu64")\n", 2435 dev->ifname, ctx->msg.payload.u64); 2436 2437 return RTE_VHOST_MSG_RESULT_ERR; 2438 } 2439 2440 dev->mtu = ctx->msg.payload.u64; 2441 2442 return RTE_VHOST_MSG_RESULT_OK; 2443 } 2444 2445 static int 2446 vhost_user_set_req_fd(struct virtio_net **pdev, 2447 struct vhu_msg_context *ctx, 2448 int main_fd __rte_unused) 2449 { 2450 struct virtio_net *dev = *pdev; 2451 int fd = ctx->fds[0]; 2452 2453 if (validate_msg_fds(dev, ctx, 1) != 0) 2454 return RTE_VHOST_MSG_RESULT_ERR; 2455 2456 if (fd < 0) { 2457 VHOST_LOG_CONFIG(ERR, "(%s) invalid file descriptor for slave channel (%d)\n", 2458 dev->ifname, fd); 2459 return RTE_VHOST_MSG_RESULT_ERR; 2460 } 2461 2462 if (dev->slave_req_fd >= 0) 2463 close(dev->slave_req_fd); 2464 2465 dev->slave_req_fd = fd; 2466 2467 return RTE_VHOST_MSG_RESULT_OK; 2468 } 2469 2470 static int 2471 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) 2472 { 2473 struct vhost_vring_addr *ra; 2474 uint64_t start, end, len; 2475 2476 start = imsg->iova; 2477 end = start + imsg->size; 2478 2479 ra = &vq->ring_addrs; 2480 len = sizeof(struct vring_desc) * vq->size; 2481 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start) 2482 return 1; 2483 2484 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size; 2485 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start) 2486 return 1; 2487 2488 len = sizeof(struct vring_used) + 2489 sizeof(struct vring_used_elem) * vq->size; 2490 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start) 2491 return 1; 2492 2493 if (ra->flags & (1 << VHOST_VRING_F_LOG)) { 2494 len = sizeof(uint64_t); 2495 if (ra->log_guest_addr < end && 2496 (ra->log_guest_addr + len) > start) 2497 return 1; 2498 } 2499 2500 return 0; 2501 } 2502 2503 static int 2504 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) 2505 { 2506 struct vhost_vring_addr *ra; 2507 uint64_t start, end, len; 2508 2509 start = imsg->iova; 2510 end = start + imsg->size; 2511 2512 ra = &vq->ring_addrs; 2513 len = sizeof(struct vring_packed_desc) * vq->size; 2514 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start) 2515 return 1; 2516 2517 len = sizeof(struct vring_packed_desc_event); 2518 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start) 2519 return 1; 2520 2521 len = sizeof(struct vring_packed_desc_event); 2522 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start) 2523 return 1; 2524 2525 if (ra->flags & (1 << VHOST_VRING_F_LOG)) { 2526 len = sizeof(uint64_t); 2527 if (ra->log_guest_addr < end && 2528 (ra->log_guest_addr + len) > start) 2529 return 1; 2530 } 2531 2532 return 0; 2533 } 2534 2535 static int is_vring_iotlb(struct virtio_net *dev, 2536 struct vhost_virtqueue *vq, 2537 struct vhost_iotlb_msg *imsg) 2538 { 2539 if (vq_is_packed(dev)) 2540 return is_vring_iotlb_packed(vq, imsg); 2541 else 2542 return is_vring_iotlb_split(vq, imsg); 2543 } 2544 2545 static int 2546 vhost_user_iotlb_msg(struct virtio_net **pdev, 2547 struct vhu_msg_context *ctx, 2548 int main_fd __rte_unused) 2549 { 2550 struct virtio_net *dev = *pdev; 2551 struct vhost_iotlb_msg *imsg = &ctx->msg.payload.iotlb; 2552 uint16_t i; 2553 uint64_t vva, len; 2554 2555 if (validate_msg_fds(dev, ctx, 0) != 0) 2556 return RTE_VHOST_MSG_RESULT_ERR; 2557 2558 switch (imsg->type) { 2559 case VHOST_IOTLB_UPDATE: 2560 len = imsg->size; 2561 vva = qva_to_vva(dev, imsg->uaddr, &len); 2562 if (!vva) 2563 return RTE_VHOST_MSG_RESULT_ERR; 2564 2565 for (i = 0; i < dev->nr_vring; i++) { 2566 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2567 2568 if (!vq) 2569 continue; 2570 2571 vhost_user_iotlb_cache_insert(dev, vq, imsg->iova, vva, 2572 len, imsg->perm); 2573 2574 if (is_vring_iotlb(dev, vq, imsg)) 2575 *pdev = dev = translate_ring_addresses(dev, i); 2576 } 2577 break; 2578 case VHOST_IOTLB_INVALIDATE: 2579 for (i = 0; i < dev->nr_vring; i++) { 2580 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2581 2582 if (!vq) 2583 continue; 2584 2585 vhost_user_iotlb_cache_remove(vq, imsg->iova, 2586 imsg->size); 2587 2588 if (is_vring_iotlb(dev, vq, imsg)) 2589 vring_invalidate(dev, vq); 2590 } 2591 break; 2592 default: 2593 VHOST_LOG_CONFIG(ERR, "(%s) invalid IOTLB message type (%d)\n", 2594 dev->ifname, imsg->type); 2595 return RTE_VHOST_MSG_RESULT_ERR; 2596 } 2597 2598 return RTE_VHOST_MSG_RESULT_OK; 2599 } 2600 2601 static int 2602 vhost_user_set_postcopy_advise(struct virtio_net **pdev, 2603 struct vhu_msg_context *ctx, 2604 int main_fd __rte_unused) 2605 { 2606 struct virtio_net *dev = *pdev; 2607 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 2608 struct uffdio_api api_struct; 2609 2610 if (validate_msg_fds(dev, ctx, 0) != 0) 2611 return RTE_VHOST_MSG_RESULT_ERR; 2612 2613 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); 2614 2615 if (dev->postcopy_ufd == -1) { 2616 VHOST_LOG_CONFIG(ERR, "(%s) userfaultfd not available: %s\n", 2617 dev->ifname, strerror(errno)); 2618 return RTE_VHOST_MSG_RESULT_ERR; 2619 } 2620 api_struct.api = UFFD_API; 2621 api_struct.features = 0; 2622 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) { 2623 VHOST_LOG_CONFIG(ERR, "(%s) UFFDIO_API ioctl failure: %s\n", 2624 dev->ifname, strerror(errno)); 2625 close(dev->postcopy_ufd); 2626 dev->postcopy_ufd = -1; 2627 return RTE_VHOST_MSG_RESULT_ERR; 2628 } 2629 ctx->fds[0] = dev->postcopy_ufd; 2630 ctx->fd_num = 1; 2631 2632 return RTE_VHOST_MSG_RESULT_REPLY; 2633 #else 2634 dev->postcopy_ufd = -1; 2635 ctx->fd_num = 0; 2636 2637 return RTE_VHOST_MSG_RESULT_ERR; 2638 #endif 2639 } 2640 2641 static int 2642 vhost_user_set_postcopy_listen(struct virtio_net **pdev, 2643 struct vhu_msg_context *ctx __rte_unused, 2644 int main_fd __rte_unused) 2645 { 2646 struct virtio_net *dev = *pdev; 2647 2648 if (validate_msg_fds(dev, ctx, 0) != 0) 2649 return RTE_VHOST_MSG_RESULT_ERR; 2650 2651 if (dev->mem && dev->mem->nregions) { 2652 VHOST_LOG_CONFIG(ERR, "(%s) regions already registered at postcopy-listen\n", 2653 dev->ifname); 2654 return RTE_VHOST_MSG_RESULT_ERR; 2655 } 2656 dev->postcopy_listening = 1; 2657 2658 return RTE_VHOST_MSG_RESULT_OK; 2659 } 2660 2661 static int 2662 vhost_user_postcopy_end(struct virtio_net **pdev, 2663 struct vhu_msg_context *ctx, 2664 int main_fd __rte_unused) 2665 { 2666 struct virtio_net *dev = *pdev; 2667 2668 if (validate_msg_fds(dev, ctx, 0) != 0) 2669 return RTE_VHOST_MSG_RESULT_ERR; 2670 2671 dev->postcopy_listening = 0; 2672 if (dev->postcopy_ufd >= 0) { 2673 close(dev->postcopy_ufd); 2674 dev->postcopy_ufd = -1; 2675 } 2676 2677 ctx->msg.payload.u64 = 0; 2678 ctx->msg.size = sizeof(ctx->msg.payload.u64); 2679 ctx->fd_num = 0; 2680 2681 return RTE_VHOST_MSG_RESULT_REPLY; 2682 } 2683 2684 static int 2685 vhost_user_get_status(struct virtio_net **pdev, 2686 struct vhu_msg_context *ctx, 2687 int main_fd __rte_unused) 2688 { 2689 struct virtio_net *dev = *pdev; 2690 2691 if (validate_msg_fds(dev, ctx, 0) != 0) 2692 return RTE_VHOST_MSG_RESULT_ERR; 2693 2694 ctx->msg.payload.u64 = dev->status; 2695 ctx->msg.size = sizeof(ctx->msg.payload.u64); 2696 ctx->fd_num = 0; 2697 2698 return RTE_VHOST_MSG_RESULT_REPLY; 2699 } 2700 2701 static int 2702 vhost_user_set_status(struct virtio_net **pdev, 2703 struct vhu_msg_context *ctx, 2704 int main_fd __rte_unused) 2705 { 2706 struct virtio_net *dev = *pdev; 2707 2708 if (validate_msg_fds(dev, ctx, 0) != 0) 2709 return RTE_VHOST_MSG_RESULT_ERR; 2710 2711 /* As per Virtio specification, the device status is 8bits long */ 2712 if (ctx->msg.payload.u64 > UINT8_MAX) { 2713 VHOST_LOG_CONFIG(ERR, "(%s) invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n", 2714 dev->ifname, ctx->msg.payload.u64); 2715 return RTE_VHOST_MSG_RESULT_ERR; 2716 } 2717 2718 dev->status = ctx->msg.payload.u64; 2719 2720 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) && 2721 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) { 2722 VHOST_LOG_CONFIG(ERR, 2723 "(%s) FEATURES_OK bit is set but feature negotiation failed\n", 2724 dev->ifname); 2725 /* 2726 * Clear the bit to let the driver know about the feature 2727 * negotiation failure 2728 */ 2729 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; 2730 } 2731 2732 VHOST_LOG_CONFIG(INFO, "(%s) new device status(0x%08x):\n", dev->ifname, 2733 dev->status); 2734 VHOST_LOG_CONFIG(INFO, "(%s)\t-RESET: %u\n", dev->ifname, 2735 (dev->status == VIRTIO_DEVICE_STATUS_RESET)); 2736 VHOST_LOG_CONFIG(INFO, "(%s)\t-ACKNOWLEDGE: %u\n", dev->ifname, 2737 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK)); 2738 VHOST_LOG_CONFIG(INFO, "(%s)\t-DRIVER: %u\n", dev->ifname, 2739 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER)); 2740 VHOST_LOG_CONFIG(INFO, "(%s)\t-FEATURES_OK: %u\n", dev->ifname, 2741 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK)); 2742 VHOST_LOG_CONFIG(INFO, "(%s)\t-DRIVER_OK: %u\n", dev->ifname, 2743 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)); 2744 VHOST_LOG_CONFIG(INFO, "(%s)\t-DEVICE_NEED_RESET: %u\n", dev->ifname, 2745 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET)); 2746 VHOST_LOG_CONFIG(INFO, "(%s)\t-FAILED: %u\n", dev->ifname, 2747 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED)); 2748 2749 return RTE_VHOST_MSG_RESULT_OK; 2750 } 2751 2752 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, 2753 struct vhu_msg_context *ctx, 2754 int main_fd); 2755 2756 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = { 2757 [VHOST_USER_NONE] = NULL, 2758 [VHOST_USER_GET_FEATURES] = vhost_user_get_features, 2759 [VHOST_USER_SET_FEATURES] = vhost_user_set_features, 2760 [VHOST_USER_SET_OWNER] = vhost_user_set_owner, 2761 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner, 2762 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table, 2763 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base, 2764 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd, 2765 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num, 2766 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr, 2767 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base, 2768 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base, 2769 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick, 2770 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call, 2771 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err, 2772 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features, 2773 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features, 2774 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num, 2775 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable, 2776 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp, 2777 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu, 2778 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd, 2779 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg, 2780 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise, 2781 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen, 2782 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end, 2783 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd, 2784 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd, 2785 [VHOST_USER_SET_STATUS] = vhost_user_set_status, 2786 [VHOST_USER_GET_STATUS] = vhost_user_get_status, 2787 }; 2788 2789 /* return bytes# of read on success or negative val on failure. */ 2790 static int 2791 read_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) 2792 { 2793 int ret; 2794 2795 ret = read_fd_message(dev->ifname, sockfd, (char *)&ctx->msg, VHOST_USER_HDR_SIZE, 2796 ctx->fds, VHOST_MEMORY_MAX_NREGIONS, &ctx->fd_num); 2797 if (ret <= 0) { 2798 return ret; 2799 } else if (ret != VHOST_USER_HDR_SIZE) { 2800 VHOST_LOG_CONFIG(ERR, "(%s) Unexpected header size read\n", dev->ifname); 2801 close_msg_fds(ctx); 2802 return -1; 2803 } 2804 2805 if (ctx->msg.size) { 2806 if (ctx->msg.size > sizeof(ctx->msg.payload)) { 2807 VHOST_LOG_CONFIG(ERR, "(%s) invalid msg size: %d\n", 2808 dev->ifname, ctx->msg.size); 2809 return -1; 2810 } 2811 ret = read(sockfd, &ctx->msg.payload, ctx->msg.size); 2812 if (ret <= 0) 2813 return ret; 2814 if (ret != (int)ctx->msg.size) { 2815 VHOST_LOG_CONFIG(ERR, "(%s) read control message failed\n", dev->ifname); 2816 return -1; 2817 } 2818 } 2819 2820 return ret; 2821 } 2822 2823 static int 2824 send_vhost_message(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) 2825 { 2826 if (!ctx) 2827 return 0; 2828 2829 return send_fd_message(dev->ifname, sockfd, (char *)&ctx->msg, 2830 VHOST_USER_HDR_SIZE + ctx->msg.size, ctx->fds, ctx->fd_num); 2831 } 2832 2833 static int 2834 send_vhost_reply(struct virtio_net *dev, int sockfd, struct vhu_msg_context *ctx) 2835 { 2836 if (!ctx) 2837 return 0; 2838 2839 ctx->msg.flags &= ~VHOST_USER_VERSION_MASK; 2840 ctx->msg.flags &= ~VHOST_USER_NEED_REPLY; 2841 ctx->msg.flags |= VHOST_USER_VERSION; 2842 ctx->msg.flags |= VHOST_USER_REPLY_MASK; 2843 2844 return send_vhost_message(dev, sockfd, ctx); 2845 } 2846 2847 static int 2848 send_vhost_slave_message(struct virtio_net *dev, 2849 struct vhu_msg_context *ctx) 2850 { 2851 int ret; 2852 2853 if (ctx->msg.flags & VHOST_USER_NEED_REPLY) 2854 rte_spinlock_lock(&dev->slave_req_lock); 2855 2856 ret = send_vhost_message(dev, dev->slave_req_fd, ctx); 2857 if (ret < 0 && (ctx->msg.flags & VHOST_USER_NEED_REPLY)) 2858 rte_spinlock_unlock(&dev->slave_req_lock); 2859 2860 return ret; 2861 } 2862 2863 /* 2864 * Allocate a queue pair if it hasn't been allocated yet 2865 */ 2866 static int 2867 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, 2868 struct vhu_msg_context *ctx) 2869 { 2870 uint32_t vring_idx; 2871 2872 switch (ctx->msg.request.master) { 2873 case VHOST_USER_SET_VRING_KICK: 2874 case VHOST_USER_SET_VRING_CALL: 2875 case VHOST_USER_SET_VRING_ERR: 2876 vring_idx = ctx->msg.payload.u64 & VHOST_USER_VRING_IDX_MASK; 2877 break; 2878 case VHOST_USER_SET_VRING_NUM: 2879 case VHOST_USER_SET_VRING_BASE: 2880 case VHOST_USER_GET_VRING_BASE: 2881 case VHOST_USER_SET_VRING_ENABLE: 2882 vring_idx = ctx->msg.payload.state.index; 2883 break; 2884 case VHOST_USER_SET_VRING_ADDR: 2885 vring_idx = ctx->msg.payload.addr.index; 2886 break; 2887 default: 2888 return 0; 2889 } 2890 2891 if (vring_idx >= VHOST_MAX_VRING) { 2892 VHOST_LOG_CONFIG(ERR, "(%s) invalid vring index: %u\n", dev->ifname, vring_idx); 2893 return -1; 2894 } 2895 2896 if (dev->virtqueue[vring_idx]) 2897 return 0; 2898 2899 return alloc_vring_queue(dev, vring_idx); 2900 } 2901 2902 static void 2903 vhost_user_lock_all_queue_pairs(struct virtio_net *dev) 2904 { 2905 unsigned int i = 0; 2906 unsigned int vq_num = 0; 2907 2908 while (vq_num < dev->nr_vring) { 2909 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2910 2911 if (vq) { 2912 rte_spinlock_lock(&vq->access_lock); 2913 vq_num++; 2914 } 2915 i++; 2916 } 2917 } 2918 2919 static void 2920 vhost_user_unlock_all_queue_pairs(struct virtio_net *dev) 2921 { 2922 unsigned int i = 0; 2923 unsigned int vq_num = 0; 2924 2925 while (vq_num < dev->nr_vring) { 2926 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2927 2928 if (vq) { 2929 rte_spinlock_unlock(&vq->access_lock); 2930 vq_num++; 2931 } 2932 i++; 2933 } 2934 } 2935 2936 int 2937 vhost_user_msg_handler(int vid, int fd) 2938 { 2939 struct virtio_net *dev; 2940 struct vhu_msg_context ctx; 2941 struct rte_vdpa_device *vdpa_dev; 2942 int ret; 2943 int unlock_required = 0; 2944 bool handled; 2945 int request; 2946 uint32_t i; 2947 2948 dev = get_device(vid); 2949 if (dev == NULL) 2950 return -1; 2951 2952 if (!dev->notify_ops) { 2953 dev->notify_ops = vhost_driver_callback_get(dev->ifname); 2954 if (!dev->notify_ops) { 2955 VHOST_LOG_CONFIG(ERR, "(%s) failed to get callback ops for driver\n", 2956 dev->ifname); 2957 return -1; 2958 } 2959 } 2960 2961 ret = read_vhost_message(dev, fd, &ctx); 2962 if (ret <= 0) { 2963 if (ret < 0) 2964 VHOST_LOG_CONFIG(ERR, "(%s) vhost read message failed\n", dev->ifname); 2965 else 2966 VHOST_LOG_CONFIG(INFO, "(%s) vhost peer closed\n", dev->ifname); 2967 2968 return -1; 2969 } 2970 2971 ret = 0; 2972 request = ctx.msg.request.master; 2973 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX && 2974 vhost_message_str[request]) { 2975 if (request != VHOST_USER_IOTLB_MSG) 2976 VHOST_LOG_CONFIG(INFO, "(%s) read message %s\n", 2977 dev->ifname, vhost_message_str[request]); 2978 else 2979 VHOST_LOG_CONFIG(DEBUG, "(%s) read message %s\n", 2980 dev->ifname, vhost_message_str[request]); 2981 } else { 2982 VHOST_LOG_CONFIG(DEBUG, "(%s) external request %d\n", dev->ifname, request); 2983 } 2984 2985 ret = vhost_user_check_and_alloc_queue_pair(dev, &ctx); 2986 if (ret < 0) { 2987 VHOST_LOG_CONFIG(ERR, "(%s) failed to alloc queue\n", dev->ifname); 2988 return -1; 2989 } 2990 2991 /* 2992 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE 2993 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops 2994 * and device is destroyed. destroy_device waits for queues to be 2995 * inactive, so it is safe. Otherwise taking the access_lock 2996 * would cause a dead lock. 2997 */ 2998 switch (request) { 2999 case VHOST_USER_SET_FEATURES: 3000 case VHOST_USER_SET_PROTOCOL_FEATURES: 3001 case VHOST_USER_SET_OWNER: 3002 case VHOST_USER_SET_MEM_TABLE: 3003 case VHOST_USER_SET_LOG_BASE: 3004 case VHOST_USER_SET_LOG_FD: 3005 case VHOST_USER_SET_VRING_NUM: 3006 case VHOST_USER_SET_VRING_ADDR: 3007 case VHOST_USER_SET_VRING_BASE: 3008 case VHOST_USER_SET_VRING_KICK: 3009 case VHOST_USER_SET_VRING_CALL: 3010 case VHOST_USER_SET_VRING_ERR: 3011 case VHOST_USER_SET_VRING_ENABLE: 3012 case VHOST_USER_SEND_RARP: 3013 case VHOST_USER_NET_SET_MTU: 3014 case VHOST_USER_SET_SLAVE_REQ_FD: 3015 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 3016 vhost_user_lock_all_queue_pairs(dev); 3017 unlock_required = 1; 3018 } 3019 break; 3020 default: 3021 break; 3022 3023 } 3024 3025 handled = false; 3026 if (dev->extern_ops.pre_msg_handle) { 3027 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid, 3028 (void *)&ctx.msg); 3029 switch (ret) { 3030 case RTE_VHOST_MSG_RESULT_REPLY: 3031 send_vhost_reply(dev, fd, &ctx); 3032 /* Fall-through */ 3033 case RTE_VHOST_MSG_RESULT_ERR: 3034 case RTE_VHOST_MSG_RESULT_OK: 3035 handled = true; 3036 goto skip_to_post_handle; 3037 case RTE_VHOST_MSG_RESULT_NOT_HANDLED: 3038 default: 3039 break; 3040 } 3041 } 3042 3043 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) { 3044 if (!vhost_message_handlers[request]) 3045 goto skip_to_post_handle; 3046 ret = vhost_message_handlers[request](&dev, &ctx, fd); 3047 3048 switch (ret) { 3049 case RTE_VHOST_MSG_RESULT_ERR: 3050 VHOST_LOG_CONFIG(ERR, "(%s) processing %s failed.\n", 3051 dev->ifname, vhost_message_str[request]); 3052 handled = true; 3053 break; 3054 case RTE_VHOST_MSG_RESULT_OK: 3055 VHOST_LOG_CONFIG(DEBUG, "(%s) processing %s succeeded.\n", 3056 dev->ifname, vhost_message_str[request]); 3057 handled = true; 3058 break; 3059 case RTE_VHOST_MSG_RESULT_REPLY: 3060 VHOST_LOG_CONFIG(DEBUG, "(%s) processing %s succeeded and needs reply.\n", 3061 dev->ifname, vhost_message_str[request]); 3062 send_vhost_reply(dev, fd, &ctx); 3063 handled = true; 3064 break; 3065 default: 3066 break; 3067 } 3068 } 3069 3070 skip_to_post_handle: 3071 if (ret != RTE_VHOST_MSG_RESULT_ERR && 3072 dev->extern_ops.post_msg_handle) { 3073 ret = (*dev->extern_ops.post_msg_handle)(dev->vid, 3074 (void *)&ctx.msg); 3075 switch (ret) { 3076 case RTE_VHOST_MSG_RESULT_REPLY: 3077 send_vhost_reply(dev, fd, &ctx); 3078 /* Fall-through */ 3079 case RTE_VHOST_MSG_RESULT_ERR: 3080 case RTE_VHOST_MSG_RESULT_OK: 3081 handled = true; 3082 case RTE_VHOST_MSG_RESULT_NOT_HANDLED: 3083 default: 3084 break; 3085 } 3086 } 3087 3088 /* If message was not handled at this stage, treat it as an error */ 3089 if (!handled) { 3090 VHOST_LOG_CONFIG(ERR, "(%s) vhost message (req: %d) was not handled.\n", 3091 dev->ifname, request); 3092 close_msg_fds(&ctx); 3093 ret = RTE_VHOST_MSG_RESULT_ERR; 3094 } 3095 3096 /* 3097 * If the request required a reply that was already sent, 3098 * this optional reply-ack won't be sent as the 3099 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply(). 3100 */ 3101 if (ctx.msg.flags & VHOST_USER_NEED_REPLY) { 3102 ctx.msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR; 3103 ctx.msg.size = sizeof(ctx.msg.payload.u64); 3104 ctx.fd_num = 0; 3105 send_vhost_reply(dev, fd, &ctx); 3106 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) { 3107 VHOST_LOG_CONFIG(ERR, "(%s) vhost message handling failed.\n", dev->ifname); 3108 return -1; 3109 } 3110 3111 for (i = 0; i < dev->nr_vring; i++) { 3112 struct vhost_virtqueue *vq = dev->virtqueue[i]; 3113 bool cur_ready = vq_is_ready(dev, vq); 3114 3115 if (cur_ready != (vq && vq->ready)) { 3116 vq->ready = cur_ready; 3117 vhost_user_notify_queue_state(dev, i, cur_ready); 3118 } 3119 } 3120 3121 if (unlock_required) 3122 vhost_user_unlock_all_queue_pairs(dev); 3123 3124 if (!virtio_is_ready(dev)) 3125 goto out; 3126 3127 /* 3128 * Virtio is now ready. If not done already, it is time 3129 * to notify the application it can process the rings and 3130 * configure the vDPA device if present. 3131 */ 3132 3133 if (!(dev->flags & VIRTIO_DEV_RUNNING)) { 3134 if (dev->notify_ops->new_device(dev->vid) == 0) 3135 dev->flags |= VIRTIO_DEV_RUNNING; 3136 } 3137 3138 vdpa_dev = dev->vdpa_dev; 3139 if (!vdpa_dev) 3140 goto out; 3141 3142 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 3143 if (vdpa_dev->ops->dev_conf(dev->vid)) 3144 VHOST_LOG_CONFIG(ERR, "(%s) failed to configure vDPA device\n", 3145 dev->ifname); 3146 else 3147 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED; 3148 } 3149 3150 out: 3151 return 0; 3152 } 3153 3154 static int process_slave_message_reply(struct virtio_net *dev, 3155 const struct vhu_msg_context *ctx) 3156 { 3157 struct vhu_msg_context msg_reply; 3158 int ret; 3159 3160 if ((ctx->msg.flags & VHOST_USER_NEED_REPLY) == 0) 3161 return 0; 3162 3163 ret = read_vhost_message(dev, dev->slave_req_fd, &msg_reply); 3164 if (ret <= 0) { 3165 if (ret < 0) 3166 VHOST_LOG_CONFIG(ERR, "(%s) vhost read slave message reply failed\n", 3167 dev->ifname); 3168 else 3169 VHOST_LOG_CONFIG(INFO, "(%s) vhost peer closed\n", dev->ifname); 3170 ret = -1; 3171 goto out; 3172 } 3173 3174 ret = 0; 3175 if (msg_reply.msg.request.slave != ctx->msg.request.slave) { 3176 VHOST_LOG_CONFIG(ERR, "(%s) received unexpected msg type (%u), expected %u\n", 3177 dev->ifname, msg_reply.msg.request.slave, ctx->msg.request.slave); 3178 ret = -1; 3179 goto out; 3180 } 3181 3182 ret = msg_reply.msg.payload.u64 ? -1 : 0; 3183 3184 out: 3185 rte_spinlock_unlock(&dev->slave_req_lock); 3186 return ret; 3187 } 3188 3189 int 3190 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm) 3191 { 3192 int ret; 3193 struct vhu_msg_context ctx = { 3194 .msg = { 3195 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG, 3196 .flags = VHOST_USER_VERSION, 3197 .size = sizeof(ctx.msg.payload.iotlb), 3198 .payload.iotlb = { 3199 .iova = iova, 3200 .perm = perm, 3201 .type = VHOST_IOTLB_MISS, 3202 }, 3203 }, 3204 }; 3205 3206 ret = send_vhost_message(dev, dev->slave_req_fd, &ctx); 3207 if (ret < 0) { 3208 VHOST_LOG_CONFIG(ERR, "(%s) failed to send IOTLB miss message (%d)\n", 3209 dev->ifname, ret); 3210 return ret; 3211 } 3212 3213 return 0; 3214 } 3215 3216 static int 3217 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply) 3218 { 3219 int ret; 3220 struct vhu_msg_context ctx = { 3221 .msg = { 3222 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG, 3223 .flags = VHOST_USER_VERSION, 3224 .size = 0, 3225 } 3226 }; 3227 3228 if (need_reply) 3229 ctx.msg.flags |= VHOST_USER_NEED_REPLY; 3230 3231 ret = send_vhost_slave_message(dev, &ctx); 3232 if (ret < 0) { 3233 VHOST_LOG_CONFIG(ERR, "(%s) failed to send config change (%d)\n", 3234 dev->ifname, ret); 3235 return ret; 3236 } 3237 3238 return process_slave_message_reply(dev, &ctx); 3239 } 3240 3241 int 3242 rte_vhost_slave_config_change(int vid, bool need_reply) 3243 { 3244 struct virtio_net *dev; 3245 3246 dev = get_device(vid); 3247 if (!dev) 3248 return -ENODEV; 3249 3250 return vhost_user_slave_config_change(dev, need_reply); 3251 } 3252 3253 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev, 3254 int index, int fd, 3255 uint64_t offset, 3256 uint64_t size) 3257 { 3258 int ret; 3259 struct vhu_msg_context ctx = { 3260 .msg = { 3261 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG, 3262 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY, 3263 .size = sizeof(ctx.msg.payload.area), 3264 .payload.area = { 3265 .u64 = index & VHOST_USER_VRING_IDX_MASK, 3266 .size = size, 3267 .offset = offset, 3268 }, 3269 }, 3270 }; 3271 3272 if (fd < 0) 3273 ctx.msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK; 3274 else { 3275 ctx.fds[0] = fd; 3276 ctx.fd_num = 1; 3277 } 3278 3279 ret = send_vhost_slave_message(dev, &ctx); 3280 if (ret < 0) { 3281 VHOST_LOG_CONFIG(ERR, "(%s) failed to set host notifier (%d)\n", 3282 dev->ifname, ret); 3283 return ret; 3284 } 3285 3286 return process_slave_message_reply(dev, &ctx); 3287 } 3288 3289 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable) 3290 { 3291 struct virtio_net *dev; 3292 struct rte_vdpa_device *vdpa_dev; 3293 int vfio_device_fd, ret = 0; 3294 uint64_t offset, size; 3295 unsigned int i, q_start, q_last; 3296 3297 dev = get_device(vid); 3298 if (!dev) 3299 return -ENODEV; 3300 3301 vdpa_dev = dev->vdpa_dev; 3302 if (vdpa_dev == NULL) 3303 return -ENODEV; 3304 3305 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) || 3306 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) || 3307 !(dev->protocol_features & 3308 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) || 3309 !(dev->protocol_features & 3310 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) || 3311 !(dev->protocol_features & 3312 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER))) 3313 return -ENOTSUP; 3314 3315 if (qid == RTE_VHOST_QUEUE_ALL) { 3316 q_start = 0; 3317 q_last = dev->nr_vring - 1; 3318 } else { 3319 if (qid >= dev->nr_vring) 3320 return -EINVAL; 3321 q_start = qid; 3322 q_last = qid; 3323 } 3324 3325 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP); 3326 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP); 3327 3328 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid); 3329 if (vfio_device_fd < 0) 3330 return -ENOTSUP; 3331 3332 if (enable) { 3333 for (i = q_start; i <= q_last; i++) { 3334 if (vdpa_dev->ops->get_notify_area(vid, i, &offset, 3335 &size) < 0) { 3336 ret = -ENOTSUP; 3337 goto disable; 3338 } 3339 3340 if (vhost_user_slave_set_vring_host_notifier(dev, i, 3341 vfio_device_fd, offset, size) < 0) { 3342 ret = -EFAULT; 3343 goto disable; 3344 } 3345 } 3346 } else { 3347 disable: 3348 for (i = q_start; i <= q_last; i++) { 3349 vhost_user_slave_set_vring_host_notifier(dev, i, -1, 3350 0, 0); 3351 } 3352 } 3353 3354 return ret; 3355 } 3356