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