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