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 1252 if (validate_msg_fds(msg, memory->nregions) != 0) 1253 return RTE_VHOST_MSG_RESULT_ERR; 1254 1255 if (memory->nregions > VHOST_MEMORY_MAX_NREGIONS) { 1256 VHOST_LOG_CONFIG(ERR, 1257 "too many memory regions (%u)\n", memory->nregions); 1258 goto close_msg_fds; 1259 } 1260 1261 if (dev->mem && !vhost_memory_changed(memory, dev->mem)) { 1262 VHOST_LOG_CONFIG(INFO, 1263 "(%d) memory regions not changed\n", dev->vid); 1264 1265 close_msg_fds(msg); 1266 1267 return RTE_VHOST_MSG_RESULT_OK; 1268 } 1269 1270 if (dev->mem) { 1271 if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) { 1272 struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev; 1273 1274 if (vdpa_dev && vdpa_dev->ops->dev_close) 1275 vdpa_dev->ops->dev_close(dev->vid); 1276 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; 1277 } 1278 free_mem_region(dev); 1279 rte_free(dev->mem); 1280 dev->mem = NULL; 1281 } 1282 1283 /* Flush IOTLB cache as previous HVAs are now invalid */ 1284 if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) 1285 for (i = 0; i < dev->nr_vring; i++) 1286 vhost_user_iotlb_flush_all(dev->virtqueue[i]); 1287 1288 /* 1289 * If VQ 0 has already been allocated, try to allocate on the same 1290 * NUMA node. It can be reallocated later in numa_realloc(). 1291 */ 1292 if (dev->nr_vring > 0) 1293 numa_node = dev->virtqueue[0]->numa_node; 1294 1295 dev->nr_guest_pages = 0; 1296 if (dev->guest_pages == NULL) { 1297 dev->max_guest_pages = 8; 1298 dev->guest_pages = rte_zmalloc_socket(NULL, 1299 dev->max_guest_pages * 1300 sizeof(struct guest_page), 1301 RTE_CACHE_LINE_SIZE, 1302 numa_node); 1303 if (dev->guest_pages == NULL) { 1304 VHOST_LOG_CONFIG(ERR, 1305 "(%d) failed to allocate memory " 1306 "for dev->guest_pages\n", 1307 dev->vid); 1308 goto close_msg_fds; 1309 } 1310 } 1311 1312 dev->mem = rte_zmalloc_socket("vhost-mem-table", sizeof(struct rte_vhost_memory) + 1313 sizeof(struct rte_vhost_mem_region) * memory->nregions, 0, numa_node); 1314 if (dev->mem == NULL) { 1315 VHOST_LOG_CONFIG(ERR, 1316 "(%d) failed to allocate memory for dev->mem\n", 1317 dev->vid); 1318 goto free_guest_pages; 1319 } 1320 1321 for (i = 0; i < memory->nregions; i++) { 1322 reg = &dev->mem->regions[i]; 1323 1324 reg->guest_phys_addr = memory->regions[i].guest_phys_addr; 1325 reg->guest_user_addr = memory->regions[i].userspace_addr; 1326 reg->size = memory->regions[i].memory_size; 1327 reg->fd = msg->fds[i]; 1328 1329 /* 1330 * Assign invalid file descriptor value to avoid double 1331 * closing on error path. 1332 */ 1333 msg->fds[i] = -1; 1334 1335 mmap_offset = memory->regions[i].mmap_offset; 1336 1337 if (vhost_user_mmap_region(dev, reg, mmap_offset) < 0) { 1338 VHOST_LOG_CONFIG(ERR, "Failed to mmap region %u\n", i); 1339 goto free_mem_table; 1340 } 1341 1342 dev->mem->nregions++; 1343 } 1344 1345 if (vhost_user_postcopy_register(dev, main_fd, msg) < 0) 1346 goto free_mem_table; 1347 1348 for (i = 0; i < dev->nr_vring; i++) { 1349 struct vhost_virtqueue *vq = dev->virtqueue[i]; 1350 1351 if (!vq) 1352 continue; 1353 1354 if (vq->desc || vq->avail || vq->used) { 1355 /* 1356 * If the memory table got updated, the ring addresses 1357 * need to be translated again as virtual addresses have 1358 * changed. 1359 */ 1360 vring_invalidate(dev, vq); 1361 1362 dev = translate_ring_addresses(dev, i); 1363 if (!dev) { 1364 dev = *pdev; 1365 goto free_mem_table; 1366 } 1367 1368 *pdev = dev; 1369 } 1370 } 1371 1372 dump_guest_pages(dev); 1373 1374 return RTE_VHOST_MSG_RESULT_OK; 1375 1376 free_mem_table: 1377 free_mem_region(dev); 1378 rte_free(dev->mem); 1379 dev->mem = NULL; 1380 free_guest_pages: 1381 rte_free(dev->guest_pages); 1382 dev->guest_pages = NULL; 1383 close_msg_fds: 1384 close_msg_fds(msg); 1385 return RTE_VHOST_MSG_RESULT_ERR; 1386 } 1387 1388 static bool 1389 vq_is_ready(struct virtio_net *dev, struct vhost_virtqueue *vq) 1390 { 1391 bool rings_ok; 1392 1393 if (!vq) 1394 return false; 1395 1396 if (vq_is_packed(dev)) 1397 rings_ok = vq->desc_packed && vq->driver_event && 1398 vq->device_event; 1399 else 1400 rings_ok = vq->desc && vq->avail && vq->used; 1401 1402 return rings_ok && 1403 vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD && 1404 vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD && 1405 vq->enabled; 1406 } 1407 1408 #define VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY 2u 1409 1410 static int 1411 virtio_is_ready(struct virtio_net *dev) 1412 { 1413 struct vhost_virtqueue *vq; 1414 uint32_t i, nr_vring = dev->nr_vring; 1415 1416 if (dev->flags & VIRTIO_DEV_READY) 1417 return 1; 1418 1419 if (!dev->nr_vring) 1420 return 0; 1421 1422 if (dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET) { 1423 nr_vring = VIRTIO_BUILTIN_NUM_VQS_TO_BE_READY; 1424 1425 if (dev->nr_vring < nr_vring) 1426 return 0; 1427 } 1428 1429 for (i = 0; i < nr_vring; i++) { 1430 vq = dev->virtqueue[i]; 1431 1432 if (!vq_is_ready(dev, vq)) 1433 return 0; 1434 } 1435 1436 /* If supported, ensure the frontend is really done with config */ 1437 if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_STATUS)) 1438 if (!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK)) 1439 return 0; 1440 1441 dev->flags |= VIRTIO_DEV_READY; 1442 1443 if (!(dev->flags & VIRTIO_DEV_RUNNING)) 1444 VHOST_LOG_CONFIG(INFO, 1445 "virtio is now ready for processing.\n"); 1446 return 1; 1447 } 1448 1449 static void * 1450 inflight_mem_alloc(const char *name, size_t size, int *fd) 1451 { 1452 void *ptr; 1453 int mfd = -1; 1454 char fname[20] = "/tmp/memfd-XXXXXX"; 1455 1456 *fd = -1; 1457 #ifdef MEMFD_SUPPORTED 1458 mfd = memfd_create(name, MFD_CLOEXEC); 1459 #else 1460 RTE_SET_USED(name); 1461 #endif 1462 if (mfd == -1) { 1463 mfd = mkstemp(fname); 1464 if (mfd == -1) { 1465 VHOST_LOG_CONFIG(ERR, 1466 "failed to get inflight buffer fd\n"); 1467 return NULL; 1468 } 1469 1470 unlink(fname); 1471 } 1472 1473 if (ftruncate(mfd, size) == -1) { 1474 VHOST_LOG_CONFIG(ERR, 1475 "failed to alloc inflight buffer\n"); 1476 close(mfd); 1477 return NULL; 1478 } 1479 1480 ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, mfd, 0); 1481 if (ptr == MAP_FAILED) { 1482 VHOST_LOG_CONFIG(ERR, 1483 "failed to mmap inflight buffer\n"); 1484 close(mfd); 1485 return NULL; 1486 } 1487 1488 *fd = mfd; 1489 return ptr; 1490 } 1491 1492 static uint32_t 1493 get_pervq_shm_size_split(uint16_t queue_size) 1494 { 1495 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_split) * 1496 queue_size + sizeof(uint64_t) + 1497 sizeof(uint16_t) * 4, INFLIGHT_ALIGNMENT); 1498 } 1499 1500 static uint32_t 1501 get_pervq_shm_size_packed(uint16_t queue_size) 1502 { 1503 return RTE_ALIGN_MUL_CEIL(sizeof(struct rte_vhost_inflight_desc_packed) 1504 * queue_size + sizeof(uint64_t) + 1505 sizeof(uint16_t) * 6 + sizeof(uint8_t) * 9, 1506 INFLIGHT_ALIGNMENT); 1507 } 1508 1509 static int 1510 vhost_user_get_inflight_fd(struct virtio_net **pdev, 1511 VhostUserMsg *msg, 1512 int main_fd __rte_unused) 1513 { 1514 struct rte_vhost_inflight_info_packed *inflight_packed; 1515 uint64_t pervq_inflight_size, mmap_size; 1516 uint16_t num_queues, queue_size; 1517 struct virtio_net *dev = *pdev; 1518 int fd, i, j; 1519 int numa_node = SOCKET_ID_ANY; 1520 void *addr; 1521 1522 if (msg->size != sizeof(msg->payload.inflight)) { 1523 VHOST_LOG_CONFIG(ERR, 1524 "invalid get_inflight_fd message size is %d\n", 1525 msg->size); 1526 return RTE_VHOST_MSG_RESULT_ERR; 1527 } 1528 1529 /* 1530 * If VQ 0 has already been allocated, try to allocate on the same 1531 * NUMA node. It can be reallocated later in numa_realloc(). 1532 */ 1533 if (dev->nr_vring > 0) 1534 numa_node = dev->virtqueue[0]->numa_node; 1535 1536 if (dev->inflight_info == NULL) { 1537 dev->inflight_info = rte_zmalloc_socket("inflight_info", 1538 sizeof(struct inflight_mem_info), 0, numa_node); 1539 if (!dev->inflight_info) { 1540 VHOST_LOG_CONFIG(ERR, 1541 "failed to alloc dev inflight area\n"); 1542 return RTE_VHOST_MSG_RESULT_ERR; 1543 } 1544 dev->inflight_info->fd = -1; 1545 } 1546 1547 num_queues = msg->payload.inflight.num_queues; 1548 queue_size = msg->payload.inflight.queue_size; 1549 1550 VHOST_LOG_CONFIG(INFO, "get_inflight_fd num_queues: %u\n", 1551 msg->payload.inflight.num_queues); 1552 VHOST_LOG_CONFIG(INFO, "get_inflight_fd queue_size: %u\n", 1553 msg->payload.inflight.queue_size); 1554 1555 if (vq_is_packed(dev)) 1556 pervq_inflight_size = get_pervq_shm_size_packed(queue_size); 1557 else 1558 pervq_inflight_size = get_pervq_shm_size_split(queue_size); 1559 1560 mmap_size = num_queues * pervq_inflight_size; 1561 addr = inflight_mem_alloc("vhost-inflight", mmap_size, &fd); 1562 if (!addr) { 1563 VHOST_LOG_CONFIG(ERR, 1564 "failed to alloc vhost inflight area\n"); 1565 msg->payload.inflight.mmap_size = 0; 1566 return RTE_VHOST_MSG_RESULT_ERR; 1567 } 1568 memset(addr, 0, mmap_size); 1569 1570 if (dev->inflight_info->addr) { 1571 munmap(dev->inflight_info->addr, dev->inflight_info->size); 1572 dev->inflight_info->addr = NULL; 1573 } 1574 1575 if (dev->inflight_info->fd >= 0) { 1576 close(dev->inflight_info->fd); 1577 dev->inflight_info->fd = -1; 1578 } 1579 1580 dev->inflight_info->addr = addr; 1581 dev->inflight_info->size = msg->payload.inflight.mmap_size = mmap_size; 1582 dev->inflight_info->fd = msg->fds[0] = fd; 1583 msg->payload.inflight.mmap_offset = 0; 1584 msg->fd_num = 1; 1585 1586 if (vq_is_packed(dev)) { 1587 for (i = 0; i < num_queues; i++) { 1588 inflight_packed = 1589 (struct rte_vhost_inflight_info_packed *)addr; 1590 inflight_packed->used_wrap_counter = 1; 1591 inflight_packed->old_used_wrap_counter = 1; 1592 for (j = 0; j < queue_size; j++) 1593 inflight_packed->desc[j].next = j + 1; 1594 addr = (void *)((char *)addr + pervq_inflight_size); 1595 } 1596 } 1597 1598 VHOST_LOG_CONFIG(INFO, 1599 "send inflight mmap_size: %"PRIu64"\n", 1600 msg->payload.inflight.mmap_size); 1601 VHOST_LOG_CONFIG(INFO, 1602 "send inflight mmap_offset: %"PRIu64"\n", 1603 msg->payload.inflight.mmap_offset); 1604 VHOST_LOG_CONFIG(INFO, 1605 "send inflight fd: %d\n", msg->fds[0]); 1606 1607 return RTE_VHOST_MSG_RESULT_REPLY; 1608 } 1609 1610 static int 1611 vhost_user_set_inflight_fd(struct virtio_net **pdev, VhostUserMsg *msg, 1612 int main_fd __rte_unused) 1613 { 1614 uint64_t mmap_size, mmap_offset; 1615 uint16_t num_queues, queue_size; 1616 struct virtio_net *dev = *pdev; 1617 uint32_t pervq_inflight_size; 1618 struct vhost_virtqueue *vq; 1619 void *addr; 1620 int fd, i; 1621 int numa_node = SOCKET_ID_ANY; 1622 1623 fd = msg->fds[0]; 1624 if (msg->size != sizeof(msg->payload.inflight) || fd < 0) { 1625 VHOST_LOG_CONFIG(ERR, 1626 "invalid set_inflight_fd message size is %d,fd is %d\n", 1627 msg->size, fd); 1628 return RTE_VHOST_MSG_RESULT_ERR; 1629 } 1630 1631 mmap_size = msg->payload.inflight.mmap_size; 1632 mmap_offset = msg->payload.inflight.mmap_offset; 1633 num_queues = msg->payload.inflight.num_queues; 1634 queue_size = msg->payload.inflight.queue_size; 1635 1636 if (vq_is_packed(dev)) 1637 pervq_inflight_size = get_pervq_shm_size_packed(queue_size); 1638 else 1639 pervq_inflight_size = get_pervq_shm_size_split(queue_size); 1640 1641 VHOST_LOG_CONFIG(INFO, 1642 "set_inflight_fd mmap_size: %"PRIu64"\n", mmap_size); 1643 VHOST_LOG_CONFIG(INFO, 1644 "set_inflight_fd mmap_offset: %"PRIu64"\n", mmap_offset); 1645 VHOST_LOG_CONFIG(INFO, 1646 "set_inflight_fd num_queues: %u\n", num_queues); 1647 VHOST_LOG_CONFIG(INFO, 1648 "set_inflight_fd queue_size: %u\n", queue_size); 1649 VHOST_LOG_CONFIG(INFO, 1650 "set_inflight_fd fd: %d\n", fd); 1651 VHOST_LOG_CONFIG(INFO, 1652 "set_inflight_fd pervq_inflight_size: %d\n", 1653 pervq_inflight_size); 1654 1655 /* 1656 * If VQ 0 has already been allocated, try to allocate on the same 1657 * NUMA node. It can be reallocated later in numa_realloc(). 1658 */ 1659 if (dev->nr_vring > 0) 1660 numa_node = dev->virtqueue[0]->numa_node; 1661 1662 if (!dev->inflight_info) { 1663 dev->inflight_info = rte_zmalloc_socket("inflight_info", 1664 sizeof(struct inflight_mem_info), 0, numa_node); 1665 if (dev->inflight_info == NULL) { 1666 VHOST_LOG_CONFIG(ERR, 1667 "failed to alloc dev inflight area\n"); 1668 return RTE_VHOST_MSG_RESULT_ERR; 1669 } 1670 dev->inflight_info->fd = -1; 1671 } 1672 1673 if (dev->inflight_info->addr) { 1674 munmap(dev->inflight_info->addr, dev->inflight_info->size); 1675 dev->inflight_info->addr = NULL; 1676 } 1677 1678 addr = mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, 1679 fd, mmap_offset); 1680 if (addr == MAP_FAILED) { 1681 VHOST_LOG_CONFIG(ERR, "failed to mmap share memory.\n"); 1682 return RTE_VHOST_MSG_RESULT_ERR; 1683 } 1684 1685 if (dev->inflight_info->fd >= 0) { 1686 close(dev->inflight_info->fd); 1687 dev->inflight_info->fd = -1; 1688 } 1689 1690 dev->inflight_info->fd = fd; 1691 dev->inflight_info->addr = addr; 1692 dev->inflight_info->size = mmap_size; 1693 1694 for (i = 0; i < num_queues; i++) { 1695 vq = dev->virtqueue[i]; 1696 if (!vq) 1697 continue; 1698 1699 if (vq_is_packed(dev)) { 1700 vq->inflight_packed = addr; 1701 vq->inflight_packed->desc_num = queue_size; 1702 } else { 1703 vq->inflight_split = addr; 1704 vq->inflight_split->desc_num = queue_size; 1705 } 1706 addr = (void *)((char *)addr + pervq_inflight_size); 1707 } 1708 1709 return RTE_VHOST_MSG_RESULT_OK; 1710 } 1711 1712 static int 1713 vhost_user_set_vring_call(struct virtio_net **pdev, struct VhostUserMsg *msg, 1714 int main_fd __rte_unused) 1715 { 1716 struct virtio_net *dev = *pdev; 1717 struct vhost_vring_file file; 1718 struct vhost_virtqueue *vq; 1719 int expected_fds; 1720 1721 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1722 if (validate_msg_fds(msg, expected_fds) != 0) 1723 return RTE_VHOST_MSG_RESULT_ERR; 1724 1725 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK; 1726 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) 1727 file.fd = VIRTIO_INVALID_EVENTFD; 1728 else 1729 file.fd = msg->fds[0]; 1730 VHOST_LOG_CONFIG(INFO, 1731 "vring call idx:%d file:%d\n", file.index, file.fd); 1732 1733 vq = dev->virtqueue[file.index]; 1734 1735 if (vq->ready) { 1736 vq->ready = false; 1737 vhost_user_notify_queue_state(dev, file.index, 0); 1738 } 1739 1740 if (vq->callfd >= 0) 1741 close(vq->callfd); 1742 1743 vq->callfd = file.fd; 1744 1745 return RTE_VHOST_MSG_RESULT_OK; 1746 } 1747 1748 static int vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused, 1749 struct VhostUserMsg *msg, 1750 int main_fd __rte_unused) 1751 { 1752 int expected_fds; 1753 1754 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1755 if (validate_msg_fds(msg, expected_fds) != 0) 1756 return RTE_VHOST_MSG_RESULT_ERR; 1757 1758 if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)) 1759 close(msg->fds[0]); 1760 VHOST_LOG_CONFIG(INFO, "not implemented\n"); 1761 1762 return RTE_VHOST_MSG_RESULT_OK; 1763 } 1764 1765 static int 1766 resubmit_desc_compare(const void *a, const void *b) 1767 { 1768 const struct rte_vhost_resubmit_desc *desc0 = a; 1769 const struct rte_vhost_resubmit_desc *desc1 = b; 1770 1771 if (desc1->counter > desc0->counter) 1772 return 1; 1773 1774 return -1; 1775 } 1776 1777 static int 1778 vhost_check_queue_inflights_split(struct virtio_net *dev, 1779 struct vhost_virtqueue *vq) 1780 { 1781 uint16_t i; 1782 uint16_t resubmit_num = 0, last_io, num; 1783 struct vring_used *used = vq->used; 1784 struct rte_vhost_resubmit_info *resubmit; 1785 struct rte_vhost_inflight_info_split *inflight_split; 1786 1787 if (!(dev->protocol_features & 1788 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) 1789 return RTE_VHOST_MSG_RESULT_OK; 1790 1791 /* The frontend may still not support the inflight feature 1792 * although we negotiate the protocol feature. 1793 */ 1794 if ((!vq->inflight_split)) 1795 return RTE_VHOST_MSG_RESULT_OK; 1796 1797 if (!vq->inflight_split->version) { 1798 vq->inflight_split->version = INFLIGHT_VERSION; 1799 return RTE_VHOST_MSG_RESULT_OK; 1800 } 1801 1802 if (vq->resubmit_inflight) 1803 return RTE_VHOST_MSG_RESULT_OK; 1804 1805 inflight_split = vq->inflight_split; 1806 vq->global_counter = 0; 1807 last_io = inflight_split->last_inflight_io; 1808 1809 if (inflight_split->used_idx != used->idx) { 1810 inflight_split->desc[last_io].inflight = 0; 1811 rte_atomic_thread_fence(__ATOMIC_SEQ_CST); 1812 inflight_split->used_idx = used->idx; 1813 } 1814 1815 for (i = 0; i < inflight_split->desc_num; i++) { 1816 if (inflight_split->desc[i].inflight == 1) 1817 resubmit_num++; 1818 } 1819 1820 vq->last_avail_idx += resubmit_num; 1821 1822 if (resubmit_num) { 1823 resubmit = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 1824 0, vq->numa_node); 1825 if (!resubmit) { 1826 VHOST_LOG_CONFIG(ERR, 1827 "failed to allocate memory for resubmit info.\n"); 1828 return RTE_VHOST_MSG_RESULT_ERR; 1829 } 1830 1831 resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", 1832 resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 1833 0, vq->numa_node); 1834 if (!resubmit->resubmit_list) { 1835 VHOST_LOG_CONFIG(ERR, 1836 "failed to allocate memory for inflight desc.\n"); 1837 rte_free(resubmit); 1838 return RTE_VHOST_MSG_RESULT_ERR; 1839 } 1840 1841 num = 0; 1842 for (i = 0; i < vq->inflight_split->desc_num; i++) { 1843 if (vq->inflight_split->desc[i].inflight == 1) { 1844 resubmit->resubmit_list[num].index = i; 1845 resubmit->resubmit_list[num].counter = 1846 inflight_split->desc[i].counter; 1847 num++; 1848 } 1849 } 1850 resubmit->resubmit_num = num; 1851 1852 if (resubmit->resubmit_num > 1) 1853 qsort(resubmit->resubmit_list, resubmit->resubmit_num, 1854 sizeof(struct rte_vhost_resubmit_desc), 1855 resubmit_desc_compare); 1856 1857 vq->global_counter = resubmit->resubmit_list[0].counter + 1; 1858 vq->resubmit_inflight = resubmit; 1859 } 1860 1861 return RTE_VHOST_MSG_RESULT_OK; 1862 } 1863 1864 static int 1865 vhost_check_queue_inflights_packed(struct virtio_net *dev, 1866 struct vhost_virtqueue *vq) 1867 { 1868 uint16_t i; 1869 uint16_t resubmit_num = 0, old_used_idx, num; 1870 struct rte_vhost_resubmit_info *resubmit; 1871 struct rte_vhost_inflight_info_packed *inflight_packed; 1872 1873 if (!(dev->protocol_features & 1874 (1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD))) 1875 return RTE_VHOST_MSG_RESULT_OK; 1876 1877 /* The frontend may still not support the inflight feature 1878 * although we negotiate the protocol feature. 1879 */ 1880 if ((!vq->inflight_packed)) 1881 return RTE_VHOST_MSG_RESULT_OK; 1882 1883 if (!vq->inflight_packed->version) { 1884 vq->inflight_packed->version = INFLIGHT_VERSION; 1885 return RTE_VHOST_MSG_RESULT_OK; 1886 } 1887 1888 if (vq->resubmit_inflight) 1889 return RTE_VHOST_MSG_RESULT_OK; 1890 1891 inflight_packed = vq->inflight_packed; 1892 vq->global_counter = 0; 1893 old_used_idx = inflight_packed->old_used_idx; 1894 1895 if (inflight_packed->used_idx != old_used_idx) { 1896 if (inflight_packed->desc[old_used_idx].inflight == 0) { 1897 inflight_packed->old_used_idx = 1898 inflight_packed->used_idx; 1899 inflight_packed->old_used_wrap_counter = 1900 inflight_packed->used_wrap_counter; 1901 inflight_packed->old_free_head = 1902 inflight_packed->free_head; 1903 } else { 1904 inflight_packed->used_idx = 1905 inflight_packed->old_used_idx; 1906 inflight_packed->used_wrap_counter = 1907 inflight_packed->old_used_wrap_counter; 1908 inflight_packed->free_head = 1909 inflight_packed->old_free_head; 1910 } 1911 } 1912 1913 for (i = 0; i < inflight_packed->desc_num; i++) { 1914 if (inflight_packed->desc[i].inflight == 1) 1915 resubmit_num++; 1916 } 1917 1918 if (resubmit_num) { 1919 resubmit = rte_zmalloc_socket("resubmit", sizeof(struct rte_vhost_resubmit_info), 1920 0, vq->numa_node); 1921 if (resubmit == NULL) { 1922 VHOST_LOG_CONFIG(ERR, 1923 "failed to allocate memory for resubmit info.\n"); 1924 return RTE_VHOST_MSG_RESULT_ERR; 1925 } 1926 1927 resubmit->resubmit_list = rte_zmalloc_socket("resubmit_list", 1928 resubmit_num * sizeof(struct rte_vhost_resubmit_desc), 1929 0, vq->numa_node); 1930 if (resubmit->resubmit_list == NULL) { 1931 VHOST_LOG_CONFIG(ERR, 1932 "failed to allocate memory for resubmit desc.\n"); 1933 rte_free(resubmit); 1934 return RTE_VHOST_MSG_RESULT_ERR; 1935 } 1936 1937 num = 0; 1938 for (i = 0; i < inflight_packed->desc_num; i++) { 1939 if (vq->inflight_packed->desc[i].inflight == 1) { 1940 resubmit->resubmit_list[num].index = i; 1941 resubmit->resubmit_list[num].counter = 1942 inflight_packed->desc[i].counter; 1943 num++; 1944 } 1945 } 1946 resubmit->resubmit_num = num; 1947 1948 if (resubmit->resubmit_num > 1) 1949 qsort(resubmit->resubmit_list, resubmit->resubmit_num, 1950 sizeof(struct rte_vhost_resubmit_desc), 1951 resubmit_desc_compare); 1952 1953 vq->global_counter = resubmit->resubmit_list[0].counter + 1; 1954 vq->resubmit_inflight = resubmit; 1955 } 1956 1957 return RTE_VHOST_MSG_RESULT_OK; 1958 } 1959 1960 static int 1961 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg, 1962 int main_fd __rte_unused) 1963 { 1964 struct virtio_net *dev = *pdev; 1965 struct vhost_vring_file file; 1966 struct vhost_virtqueue *vq; 1967 int expected_fds; 1968 1969 expected_fds = (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) ? 0 : 1; 1970 if (validate_msg_fds(msg, expected_fds) != 0) 1971 return RTE_VHOST_MSG_RESULT_ERR; 1972 1973 file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK; 1974 if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK) 1975 file.fd = VIRTIO_INVALID_EVENTFD; 1976 else 1977 file.fd = msg->fds[0]; 1978 VHOST_LOG_CONFIG(INFO, 1979 "vring kick idx:%d file:%d\n", file.index, file.fd); 1980 1981 /* Interpret ring addresses only when ring is started. */ 1982 dev = translate_ring_addresses(dev, file.index); 1983 if (!dev) { 1984 if (file.fd != VIRTIO_INVALID_EVENTFD) 1985 close(file.fd); 1986 1987 return RTE_VHOST_MSG_RESULT_ERR; 1988 } 1989 1990 *pdev = dev; 1991 1992 vq = dev->virtqueue[file.index]; 1993 1994 /* 1995 * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated, 1996 * the ring starts already enabled. Otherwise, it is enabled via 1997 * the SET_VRING_ENABLE message. 1998 */ 1999 if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) { 2000 vq->enabled = true; 2001 } 2002 2003 if (vq->ready) { 2004 vq->ready = false; 2005 vhost_user_notify_queue_state(dev, file.index, 0); 2006 } 2007 2008 if (vq->kickfd >= 0) 2009 close(vq->kickfd); 2010 vq->kickfd = file.fd; 2011 2012 if (vq_is_packed(dev)) { 2013 if (vhost_check_queue_inflights_packed(dev, vq)) { 2014 VHOST_LOG_CONFIG(ERR, 2015 "failed to inflights for vq: %d\n", file.index); 2016 return RTE_VHOST_MSG_RESULT_ERR; 2017 } 2018 } else { 2019 if (vhost_check_queue_inflights_split(dev, vq)) { 2020 VHOST_LOG_CONFIG(ERR, 2021 "failed to inflights for vq: %d\n", file.index); 2022 return RTE_VHOST_MSG_RESULT_ERR; 2023 } 2024 } 2025 2026 return RTE_VHOST_MSG_RESULT_OK; 2027 } 2028 2029 /* 2030 * when virtio is stopped, qemu will send us the GET_VRING_BASE message. 2031 */ 2032 static int 2033 vhost_user_get_vring_base(struct virtio_net **pdev, 2034 struct VhostUserMsg *msg, 2035 int main_fd __rte_unused) 2036 { 2037 struct virtio_net *dev = *pdev; 2038 struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index]; 2039 uint64_t val; 2040 2041 if (validate_msg_fds(msg, 0) != 0) 2042 return RTE_VHOST_MSG_RESULT_ERR; 2043 2044 /* We have to stop the queue (virtio) if it is running. */ 2045 vhost_destroy_device_notify(dev); 2046 2047 dev->flags &= ~VIRTIO_DEV_READY; 2048 dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED; 2049 2050 /* Here we are safe to get the indexes */ 2051 if (vq_is_packed(dev)) { 2052 /* 2053 * Bit[0:14]: avail index 2054 * Bit[15]: avail wrap counter 2055 */ 2056 val = vq->last_avail_idx & 0x7fff; 2057 val |= vq->avail_wrap_counter << 15; 2058 msg->payload.state.num = val; 2059 } else { 2060 msg->payload.state.num = vq->last_avail_idx; 2061 } 2062 2063 VHOST_LOG_CONFIG(INFO, 2064 "vring base idx:%d file:%d\n", msg->payload.state.index, 2065 msg->payload.state.num); 2066 /* 2067 * Based on current qemu vhost-user implementation, this message is 2068 * sent and only sent in vhost_vring_stop. 2069 * TODO: cleanup the vring, it isn't usable since here. 2070 */ 2071 if (vq->kickfd >= 0) 2072 close(vq->kickfd); 2073 2074 vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD; 2075 2076 if (vq->callfd >= 0) 2077 close(vq->callfd); 2078 2079 vq->callfd = VIRTIO_UNINITIALIZED_EVENTFD; 2080 2081 vq->signalled_used_valid = false; 2082 2083 if (vq_is_packed(dev)) { 2084 rte_free(vq->shadow_used_packed); 2085 vq->shadow_used_packed = NULL; 2086 } else { 2087 rte_free(vq->shadow_used_split); 2088 vq->shadow_used_split = NULL; 2089 } 2090 2091 rte_free(vq->batch_copy_elems); 2092 vq->batch_copy_elems = NULL; 2093 2094 rte_free(vq->log_cache); 2095 vq->log_cache = NULL; 2096 2097 msg->size = sizeof(msg->payload.state); 2098 msg->fd_num = 0; 2099 2100 vring_invalidate(dev, vq); 2101 2102 return RTE_VHOST_MSG_RESULT_REPLY; 2103 } 2104 2105 /* 2106 * when virtio queues are ready to work, qemu will send us to 2107 * enable the virtio queue pair. 2108 */ 2109 static int 2110 vhost_user_set_vring_enable(struct virtio_net **pdev, 2111 struct VhostUserMsg *msg, 2112 int main_fd __rte_unused) 2113 { 2114 struct virtio_net *dev = *pdev; 2115 bool enable = !!msg->payload.state.num; 2116 int index = (int)msg->payload.state.index; 2117 2118 if (validate_msg_fds(msg, 0) != 0) 2119 return RTE_VHOST_MSG_RESULT_ERR; 2120 2121 VHOST_LOG_CONFIG(INFO, 2122 "set queue enable: %d to qp idx: %d\n", 2123 enable, index); 2124 2125 if (enable && dev->virtqueue[index]->async_registered) { 2126 if (dev->virtqueue[index]->async_pkts_inflight_n) { 2127 VHOST_LOG_CONFIG(ERR, "failed to enable vring. " 2128 "async inflight packets must be completed first\n"); 2129 return RTE_VHOST_MSG_RESULT_ERR; 2130 } 2131 } 2132 2133 dev->virtqueue[index]->enabled = enable; 2134 2135 return RTE_VHOST_MSG_RESULT_OK; 2136 } 2137 2138 static int 2139 vhost_user_get_protocol_features(struct virtio_net **pdev, 2140 struct VhostUserMsg *msg, 2141 int main_fd __rte_unused) 2142 { 2143 struct virtio_net *dev = *pdev; 2144 uint64_t features, protocol_features; 2145 2146 if (validate_msg_fds(msg, 0) != 0) 2147 return RTE_VHOST_MSG_RESULT_ERR; 2148 2149 rte_vhost_driver_get_features(dev->ifname, &features); 2150 rte_vhost_driver_get_protocol_features(dev->ifname, &protocol_features); 2151 2152 msg->payload.u64 = protocol_features; 2153 msg->size = sizeof(msg->payload.u64); 2154 msg->fd_num = 0; 2155 2156 return RTE_VHOST_MSG_RESULT_REPLY; 2157 } 2158 2159 static int 2160 vhost_user_set_protocol_features(struct virtio_net **pdev, 2161 struct VhostUserMsg *msg, 2162 int main_fd __rte_unused) 2163 { 2164 struct virtio_net *dev = *pdev; 2165 uint64_t protocol_features = msg->payload.u64; 2166 uint64_t slave_protocol_features = 0; 2167 2168 if (validate_msg_fds(msg, 0) != 0) 2169 return RTE_VHOST_MSG_RESULT_ERR; 2170 2171 rte_vhost_driver_get_protocol_features(dev->ifname, 2172 &slave_protocol_features); 2173 if (protocol_features & ~slave_protocol_features) { 2174 VHOST_LOG_CONFIG(ERR, 2175 "(%d) received invalid protocol features.\n", 2176 dev->vid); 2177 return RTE_VHOST_MSG_RESULT_ERR; 2178 } 2179 2180 dev->protocol_features = protocol_features; 2181 VHOST_LOG_CONFIG(INFO, 2182 "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n", 2183 dev->protocol_features); 2184 2185 return RTE_VHOST_MSG_RESULT_OK; 2186 } 2187 2188 static int 2189 vhost_user_set_log_base(struct virtio_net **pdev, struct VhostUserMsg *msg, 2190 int main_fd __rte_unused) 2191 { 2192 struct virtio_net *dev = *pdev; 2193 int fd = msg->fds[0]; 2194 uint64_t size, off; 2195 void *addr; 2196 uint32_t i; 2197 2198 if (validate_msg_fds(msg, 1) != 0) 2199 return RTE_VHOST_MSG_RESULT_ERR; 2200 2201 if (fd < 0) { 2202 VHOST_LOG_CONFIG(ERR, "invalid log fd: %d\n", fd); 2203 return RTE_VHOST_MSG_RESULT_ERR; 2204 } 2205 2206 if (msg->size != sizeof(VhostUserLog)) { 2207 VHOST_LOG_CONFIG(ERR, 2208 "invalid log base msg size: %"PRId32" != %d\n", 2209 msg->size, (int)sizeof(VhostUserLog)); 2210 goto close_msg_fds; 2211 } 2212 2213 size = msg->payload.log.mmap_size; 2214 off = msg->payload.log.mmap_offset; 2215 2216 /* Check for mmap size and offset overflow. */ 2217 if (off >= -size) { 2218 VHOST_LOG_CONFIG(ERR, 2219 "log offset %#"PRIx64" and log size %#"PRIx64" overflow\n", 2220 off, size); 2221 goto close_msg_fds; 2222 } 2223 2224 VHOST_LOG_CONFIG(INFO, 2225 "log mmap size: %"PRId64", offset: %"PRId64"\n", 2226 size, off); 2227 2228 /* 2229 * mmap from 0 to workaround a hugepage mmap bug: mmap will 2230 * fail when offset is not page size aligned. 2231 */ 2232 addr = mmap(0, size + off, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 2233 close(fd); 2234 if (addr == MAP_FAILED) { 2235 VHOST_LOG_CONFIG(ERR, "mmap log base failed!\n"); 2236 return RTE_VHOST_MSG_RESULT_ERR; 2237 } 2238 2239 /* 2240 * Free previously mapped log memory on occasionally 2241 * multiple VHOST_USER_SET_LOG_BASE. 2242 */ 2243 if (dev->log_addr) { 2244 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size); 2245 } 2246 dev->log_addr = (uint64_t)(uintptr_t)addr; 2247 dev->log_base = dev->log_addr + off; 2248 dev->log_size = size; 2249 2250 for (i = 0; i < dev->nr_vring; i++) { 2251 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2252 2253 rte_free(vq->log_cache); 2254 vq->log_cache = NULL; 2255 vq->log_cache_nb_elem = 0; 2256 vq->log_cache = rte_malloc_socket("vq log cache", 2257 sizeof(struct log_cache_entry) * VHOST_LOG_CACHE_NR, 2258 0, vq->numa_node); 2259 /* 2260 * If log cache alloc fail, don't fail migration, but no 2261 * caching will be done, which will impact performance 2262 */ 2263 if (!vq->log_cache) 2264 VHOST_LOG_CONFIG(ERR, "Failed to allocate VQ logging cache\n"); 2265 } 2266 2267 /* 2268 * The spec is not clear about it (yet), but QEMU doesn't expect 2269 * any payload in the reply. 2270 */ 2271 msg->size = 0; 2272 msg->fd_num = 0; 2273 2274 return RTE_VHOST_MSG_RESULT_REPLY; 2275 2276 close_msg_fds: 2277 close_msg_fds(msg); 2278 return RTE_VHOST_MSG_RESULT_ERR; 2279 } 2280 2281 static int vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused, 2282 struct VhostUserMsg *msg, 2283 int main_fd __rte_unused) 2284 { 2285 if (validate_msg_fds(msg, 1) != 0) 2286 return RTE_VHOST_MSG_RESULT_ERR; 2287 2288 close(msg->fds[0]); 2289 VHOST_LOG_CONFIG(INFO, "not implemented.\n"); 2290 2291 return RTE_VHOST_MSG_RESULT_OK; 2292 } 2293 2294 /* 2295 * An rarp packet is constructed and broadcasted to notify switches about 2296 * the new location of the migrated VM, so that packets from outside will 2297 * not be lost after migration. 2298 * 2299 * However, we don't actually "send" a rarp packet here, instead, we set 2300 * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it. 2301 */ 2302 static int 2303 vhost_user_send_rarp(struct virtio_net **pdev, struct VhostUserMsg *msg, 2304 int main_fd __rte_unused) 2305 { 2306 struct virtio_net *dev = *pdev; 2307 uint8_t *mac = (uint8_t *)&msg->payload.u64; 2308 struct rte_vdpa_device *vdpa_dev; 2309 2310 if (validate_msg_fds(msg, 0) != 0) 2311 return RTE_VHOST_MSG_RESULT_ERR; 2312 2313 VHOST_LOG_CONFIG(DEBUG, 2314 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n", 2315 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 2316 memcpy(dev->mac.addr_bytes, mac, 6); 2317 2318 /* 2319 * Set the flag to inject a RARP broadcast packet at 2320 * rte_vhost_dequeue_burst(). 2321 * 2322 * __ATOMIC_RELEASE ordering is for making sure the mac is 2323 * copied before the flag is set. 2324 */ 2325 __atomic_store_n(&dev->broadcast_rarp, 1, __ATOMIC_RELEASE); 2326 vdpa_dev = dev->vdpa_dev; 2327 if (vdpa_dev && vdpa_dev->ops->migration_done) 2328 vdpa_dev->ops->migration_done(dev->vid); 2329 2330 return RTE_VHOST_MSG_RESULT_OK; 2331 } 2332 2333 static int 2334 vhost_user_net_set_mtu(struct virtio_net **pdev, struct VhostUserMsg *msg, 2335 int main_fd __rte_unused) 2336 { 2337 struct virtio_net *dev = *pdev; 2338 2339 if (validate_msg_fds(msg, 0) != 0) 2340 return RTE_VHOST_MSG_RESULT_ERR; 2341 2342 if (msg->payload.u64 < VIRTIO_MIN_MTU || 2343 msg->payload.u64 > VIRTIO_MAX_MTU) { 2344 VHOST_LOG_CONFIG(ERR, "Invalid MTU size (%"PRIu64")\n", 2345 msg->payload.u64); 2346 2347 return RTE_VHOST_MSG_RESULT_ERR; 2348 } 2349 2350 dev->mtu = msg->payload.u64; 2351 2352 return RTE_VHOST_MSG_RESULT_OK; 2353 } 2354 2355 static int 2356 vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg, 2357 int main_fd __rte_unused) 2358 { 2359 struct virtio_net *dev = *pdev; 2360 int fd = msg->fds[0]; 2361 2362 if (validate_msg_fds(msg, 1) != 0) 2363 return RTE_VHOST_MSG_RESULT_ERR; 2364 2365 if (fd < 0) { 2366 VHOST_LOG_CONFIG(ERR, 2367 "Invalid file descriptor for slave channel (%d)\n", 2368 fd); 2369 return RTE_VHOST_MSG_RESULT_ERR; 2370 } 2371 2372 if (dev->slave_req_fd >= 0) 2373 close(dev->slave_req_fd); 2374 2375 dev->slave_req_fd = fd; 2376 2377 return RTE_VHOST_MSG_RESULT_OK; 2378 } 2379 2380 static int 2381 is_vring_iotlb_split(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) 2382 { 2383 struct vhost_vring_addr *ra; 2384 uint64_t start, end, len; 2385 2386 start = imsg->iova; 2387 end = start + imsg->size; 2388 2389 ra = &vq->ring_addrs; 2390 len = sizeof(struct vring_desc) * vq->size; 2391 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start) 2392 return 1; 2393 2394 len = sizeof(struct vring_avail) + sizeof(uint16_t) * vq->size; 2395 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start) 2396 return 1; 2397 2398 len = sizeof(struct vring_used) + 2399 sizeof(struct vring_used_elem) * vq->size; 2400 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start) 2401 return 1; 2402 2403 if (ra->flags & (1 << VHOST_VRING_F_LOG)) { 2404 len = sizeof(uint64_t); 2405 if (ra->log_guest_addr < end && 2406 (ra->log_guest_addr + len) > start) 2407 return 1; 2408 } 2409 2410 return 0; 2411 } 2412 2413 static int 2414 is_vring_iotlb_packed(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg) 2415 { 2416 struct vhost_vring_addr *ra; 2417 uint64_t start, end, len; 2418 2419 start = imsg->iova; 2420 end = start + imsg->size; 2421 2422 ra = &vq->ring_addrs; 2423 len = sizeof(struct vring_packed_desc) * vq->size; 2424 if (ra->desc_user_addr < end && (ra->desc_user_addr + len) > start) 2425 return 1; 2426 2427 len = sizeof(struct vring_packed_desc_event); 2428 if (ra->avail_user_addr < end && (ra->avail_user_addr + len) > start) 2429 return 1; 2430 2431 len = sizeof(struct vring_packed_desc_event); 2432 if (ra->used_user_addr < end && (ra->used_user_addr + len) > start) 2433 return 1; 2434 2435 if (ra->flags & (1 << VHOST_VRING_F_LOG)) { 2436 len = sizeof(uint64_t); 2437 if (ra->log_guest_addr < end && 2438 (ra->log_guest_addr + len) > start) 2439 return 1; 2440 } 2441 2442 return 0; 2443 } 2444 2445 static int is_vring_iotlb(struct virtio_net *dev, 2446 struct vhost_virtqueue *vq, 2447 struct vhost_iotlb_msg *imsg) 2448 { 2449 if (vq_is_packed(dev)) 2450 return is_vring_iotlb_packed(vq, imsg); 2451 else 2452 return is_vring_iotlb_split(vq, imsg); 2453 } 2454 2455 static int 2456 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg, 2457 int main_fd __rte_unused) 2458 { 2459 struct virtio_net *dev = *pdev; 2460 struct vhost_iotlb_msg *imsg = &msg->payload.iotlb; 2461 uint16_t i; 2462 uint64_t vva, len; 2463 2464 if (validate_msg_fds(msg, 0) != 0) 2465 return RTE_VHOST_MSG_RESULT_ERR; 2466 2467 switch (imsg->type) { 2468 case VHOST_IOTLB_UPDATE: 2469 len = imsg->size; 2470 vva = qva_to_vva(dev, imsg->uaddr, &len); 2471 if (!vva) 2472 return RTE_VHOST_MSG_RESULT_ERR; 2473 2474 for (i = 0; i < dev->nr_vring; i++) { 2475 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2476 2477 if (!vq) 2478 continue; 2479 2480 vhost_user_iotlb_cache_insert(vq, imsg->iova, vva, 2481 len, imsg->perm); 2482 2483 if (is_vring_iotlb(dev, vq, imsg)) 2484 *pdev = dev = translate_ring_addresses(dev, i); 2485 } 2486 break; 2487 case VHOST_IOTLB_INVALIDATE: 2488 for (i = 0; i < dev->nr_vring; i++) { 2489 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2490 2491 if (!vq) 2492 continue; 2493 2494 vhost_user_iotlb_cache_remove(vq, imsg->iova, 2495 imsg->size); 2496 2497 if (is_vring_iotlb(dev, vq, imsg)) 2498 vring_invalidate(dev, vq); 2499 } 2500 break; 2501 default: 2502 VHOST_LOG_CONFIG(ERR, "Invalid IOTLB message type (%d)\n", 2503 imsg->type); 2504 return RTE_VHOST_MSG_RESULT_ERR; 2505 } 2506 2507 return RTE_VHOST_MSG_RESULT_OK; 2508 } 2509 2510 static int 2511 vhost_user_set_postcopy_advise(struct virtio_net **pdev, 2512 struct VhostUserMsg *msg, 2513 int main_fd __rte_unused) 2514 { 2515 struct virtio_net *dev = *pdev; 2516 #ifdef RTE_LIBRTE_VHOST_POSTCOPY 2517 struct uffdio_api api_struct; 2518 2519 if (validate_msg_fds(msg, 0) != 0) 2520 return RTE_VHOST_MSG_RESULT_ERR; 2521 2522 dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); 2523 2524 if (dev->postcopy_ufd == -1) { 2525 VHOST_LOG_CONFIG(ERR, "Userfaultfd not available: %s\n", 2526 strerror(errno)); 2527 return RTE_VHOST_MSG_RESULT_ERR; 2528 } 2529 api_struct.api = UFFD_API; 2530 api_struct.features = 0; 2531 if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) { 2532 VHOST_LOG_CONFIG(ERR, "UFFDIO_API ioctl failure: %s\n", 2533 strerror(errno)); 2534 close(dev->postcopy_ufd); 2535 dev->postcopy_ufd = -1; 2536 return RTE_VHOST_MSG_RESULT_ERR; 2537 } 2538 msg->fds[0] = dev->postcopy_ufd; 2539 msg->fd_num = 1; 2540 2541 return RTE_VHOST_MSG_RESULT_REPLY; 2542 #else 2543 dev->postcopy_ufd = -1; 2544 msg->fd_num = 0; 2545 2546 return RTE_VHOST_MSG_RESULT_ERR; 2547 #endif 2548 } 2549 2550 static int 2551 vhost_user_set_postcopy_listen(struct virtio_net **pdev, 2552 struct VhostUserMsg *msg __rte_unused, 2553 int main_fd __rte_unused) 2554 { 2555 struct virtio_net *dev = *pdev; 2556 2557 if (validate_msg_fds(msg, 0) != 0) 2558 return RTE_VHOST_MSG_RESULT_ERR; 2559 2560 if (dev->mem && dev->mem->nregions) { 2561 VHOST_LOG_CONFIG(ERR, 2562 "Regions already registered at postcopy-listen\n"); 2563 return RTE_VHOST_MSG_RESULT_ERR; 2564 } 2565 dev->postcopy_listening = 1; 2566 2567 return RTE_VHOST_MSG_RESULT_OK; 2568 } 2569 2570 static int 2571 vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg, 2572 int main_fd __rte_unused) 2573 { 2574 struct virtio_net *dev = *pdev; 2575 2576 if (validate_msg_fds(msg, 0) != 0) 2577 return RTE_VHOST_MSG_RESULT_ERR; 2578 2579 dev->postcopy_listening = 0; 2580 if (dev->postcopy_ufd >= 0) { 2581 close(dev->postcopy_ufd); 2582 dev->postcopy_ufd = -1; 2583 } 2584 2585 msg->payload.u64 = 0; 2586 msg->size = sizeof(msg->payload.u64); 2587 msg->fd_num = 0; 2588 2589 return RTE_VHOST_MSG_RESULT_REPLY; 2590 } 2591 2592 static int 2593 vhost_user_get_status(struct virtio_net **pdev, struct VhostUserMsg *msg, 2594 int main_fd __rte_unused) 2595 { 2596 struct virtio_net *dev = *pdev; 2597 2598 if (validate_msg_fds(msg, 0) != 0) 2599 return RTE_VHOST_MSG_RESULT_ERR; 2600 2601 msg->payload.u64 = dev->status; 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_set_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 /* As per Virtio specification, the device status is 8bits long */ 2618 if (msg->payload.u64 > UINT8_MAX) { 2619 VHOST_LOG_CONFIG(ERR, "Invalid VHOST_USER_SET_STATUS payload 0x%" PRIx64 "\n", 2620 msg->payload.u64); 2621 return RTE_VHOST_MSG_RESULT_ERR; 2622 } 2623 2624 dev->status = msg->payload.u64; 2625 2626 if ((dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK) && 2627 (dev->flags & VIRTIO_DEV_FEATURES_FAILED)) { 2628 VHOST_LOG_CONFIG(ERR, "FEATURES_OK bit is set but feature negotiation failed\n"); 2629 /* 2630 * Clear the bit to let the driver know about the feature 2631 * negotiation failure 2632 */ 2633 dev->status &= ~VIRTIO_DEVICE_STATUS_FEATURES_OK; 2634 } 2635 2636 VHOST_LOG_CONFIG(INFO, "New device status(0x%08x):\n" 2637 "\t-RESET: %u\n" 2638 "\t-ACKNOWLEDGE: %u\n" 2639 "\t-DRIVER: %u\n" 2640 "\t-FEATURES_OK: %u\n" 2641 "\t-DRIVER_OK: %u\n" 2642 "\t-DEVICE_NEED_RESET: %u\n" 2643 "\t-FAILED: %u\n", 2644 dev->status, 2645 (dev->status == VIRTIO_DEVICE_STATUS_RESET), 2646 !!(dev->status & VIRTIO_DEVICE_STATUS_ACK), 2647 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER), 2648 !!(dev->status & VIRTIO_DEVICE_STATUS_FEATURES_OK), 2649 !!(dev->status & VIRTIO_DEVICE_STATUS_DRIVER_OK), 2650 !!(dev->status & VIRTIO_DEVICE_STATUS_DEV_NEED_RESET), 2651 !!(dev->status & VIRTIO_DEVICE_STATUS_FAILED)); 2652 2653 return RTE_VHOST_MSG_RESULT_OK; 2654 } 2655 2656 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, 2657 struct VhostUserMsg *msg, 2658 int main_fd); 2659 static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = { 2660 [VHOST_USER_NONE] = NULL, 2661 [VHOST_USER_GET_FEATURES] = vhost_user_get_features, 2662 [VHOST_USER_SET_FEATURES] = vhost_user_set_features, 2663 [VHOST_USER_SET_OWNER] = vhost_user_set_owner, 2664 [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner, 2665 [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table, 2666 [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base, 2667 [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd, 2668 [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num, 2669 [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr, 2670 [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base, 2671 [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base, 2672 [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick, 2673 [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call, 2674 [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err, 2675 [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features, 2676 [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features, 2677 [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num, 2678 [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable, 2679 [VHOST_USER_SEND_RARP] = vhost_user_send_rarp, 2680 [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu, 2681 [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd, 2682 [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg, 2683 [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise, 2684 [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen, 2685 [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end, 2686 [VHOST_USER_GET_INFLIGHT_FD] = vhost_user_get_inflight_fd, 2687 [VHOST_USER_SET_INFLIGHT_FD] = vhost_user_set_inflight_fd, 2688 [VHOST_USER_SET_STATUS] = vhost_user_set_status, 2689 [VHOST_USER_GET_STATUS] = vhost_user_get_status, 2690 }; 2691 2692 /* return bytes# of read on success or negative val on failure. */ 2693 static int 2694 read_vhost_message(int sockfd, struct VhostUserMsg *msg) 2695 { 2696 int ret; 2697 2698 ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE, 2699 msg->fds, VHOST_MEMORY_MAX_NREGIONS, &msg->fd_num); 2700 if (ret <= 0) { 2701 return ret; 2702 } else if (ret != VHOST_USER_HDR_SIZE) { 2703 VHOST_LOG_CONFIG(ERR, "Unexpected header size read\n"); 2704 close_msg_fds(msg); 2705 return -1; 2706 } 2707 2708 if (msg->size) { 2709 if (msg->size > sizeof(msg->payload)) { 2710 VHOST_LOG_CONFIG(ERR, 2711 "invalid msg size: %d\n", msg->size); 2712 return -1; 2713 } 2714 ret = read(sockfd, &msg->payload, msg->size); 2715 if (ret <= 0) 2716 return ret; 2717 if (ret != (int)msg->size) { 2718 VHOST_LOG_CONFIG(ERR, 2719 "read control message failed\n"); 2720 return -1; 2721 } 2722 } 2723 2724 return ret; 2725 } 2726 2727 static int 2728 send_vhost_message(int sockfd, struct VhostUserMsg *msg) 2729 { 2730 if (!msg) 2731 return 0; 2732 2733 return send_fd_message(sockfd, (char *)msg, 2734 VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num); 2735 } 2736 2737 static int 2738 send_vhost_reply(int sockfd, struct VhostUserMsg *msg) 2739 { 2740 if (!msg) 2741 return 0; 2742 2743 msg->flags &= ~VHOST_USER_VERSION_MASK; 2744 msg->flags &= ~VHOST_USER_NEED_REPLY; 2745 msg->flags |= VHOST_USER_VERSION; 2746 msg->flags |= VHOST_USER_REPLY_MASK; 2747 2748 return send_vhost_message(sockfd, msg); 2749 } 2750 2751 static int 2752 send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg) 2753 { 2754 int ret; 2755 2756 if (msg->flags & VHOST_USER_NEED_REPLY) 2757 rte_spinlock_lock(&dev->slave_req_lock); 2758 2759 ret = send_vhost_message(dev->slave_req_fd, msg); 2760 if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY)) 2761 rte_spinlock_unlock(&dev->slave_req_lock); 2762 2763 return ret; 2764 } 2765 2766 /* 2767 * Allocate a queue pair if it hasn't been allocated yet 2768 */ 2769 static int 2770 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, 2771 struct VhostUserMsg *msg) 2772 { 2773 uint32_t vring_idx; 2774 2775 switch (msg->request.master) { 2776 case VHOST_USER_SET_VRING_KICK: 2777 case VHOST_USER_SET_VRING_CALL: 2778 case VHOST_USER_SET_VRING_ERR: 2779 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK; 2780 break; 2781 case VHOST_USER_SET_VRING_NUM: 2782 case VHOST_USER_SET_VRING_BASE: 2783 case VHOST_USER_SET_VRING_ENABLE: 2784 vring_idx = msg->payload.state.index; 2785 break; 2786 case VHOST_USER_SET_VRING_ADDR: 2787 vring_idx = msg->payload.addr.index; 2788 break; 2789 default: 2790 return 0; 2791 } 2792 2793 if (vring_idx >= VHOST_MAX_VRING) { 2794 VHOST_LOG_CONFIG(ERR, 2795 "invalid vring index: %u\n", vring_idx); 2796 return -1; 2797 } 2798 2799 if (dev->virtqueue[vring_idx]) 2800 return 0; 2801 2802 return alloc_vring_queue(dev, vring_idx); 2803 } 2804 2805 static void 2806 vhost_user_lock_all_queue_pairs(struct virtio_net *dev) 2807 { 2808 unsigned int i = 0; 2809 unsigned int vq_num = 0; 2810 2811 while (vq_num < dev->nr_vring) { 2812 struct vhost_virtqueue *vq = dev->virtqueue[i]; 2813 2814 if (vq) { 2815 rte_spinlock_lock(&vq->access_lock); 2816 vq_num++; 2817 } 2818 i++; 2819 } 2820 } 2821 2822 static void 2823 vhost_user_unlock_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_unlock(&vq->access_lock); 2833 vq_num++; 2834 } 2835 i++; 2836 } 2837 } 2838 2839 int 2840 vhost_user_msg_handler(int vid, int fd) 2841 { 2842 struct virtio_net *dev; 2843 struct VhostUserMsg msg; 2844 struct rte_vdpa_device *vdpa_dev; 2845 int ret; 2846 int unlock_required = 0; 2847 bool handled; 2848 int request; 2849 uint32_t i; 2850 2851 dev = get_device(vid); 2852 if (dev == NULL) 2853 return -1; 2854 2855 if (!dev->notify_ops) { 2856 dev->notify_ops = vhost_driver_callback_get(dev->ifname); 2857 if (!dev->notify_ops) { 2858 VHOST_LOG_CONFIG(ERR, 2859 "failed to get callback ops for driver %s\n", 2860 dev->ifname); 2861 return -1; 2862 } 2863 } 2864 2865 ret = read_vhost_message(fd, &msg); 2866 if (ret <= 0) { 2867 if (ret < 0) 2868 VHOST_LOG_CONFIG(ERR, 2869 "vhost read message failed\n"); 2870 else 2871 VHOST_LOG_CONFIG(INFO, 2872 "vhost peer closed\n"); 2873 2874 return -1; 2875 } 2876 2877 ret = 0; 2878 request = msg.request.master; 2879 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX && 2880 vhost_message_str[request]) { 2881 if (request != VHOST_USER_IOTLB_MSG) 2882 VHOST_LOG_CONFIG(INFO, "read message %s\n", 2883 vhost_message_str[request]); 2884 else 2885 VHOST_LOG_CONFIG(DEBUG, "read message %s\n", 2886 vhost_message_str[request]); 2887 } else { 2888 VHOST_LOG_CONFIG(DEBUG, "External request %d\n", request); 2889 } 2890 2891 ret = vhost_user_check_and_alloc_queue_pair(dev, &msg); 2892 if (ret < 0) { 2893 VHOST_LOG_CONFIG(ERR, 2894 "failed to alloc queue\n"); 2895 return -1; 2896 } 2897 2898 /* 2899 * Note: we don't lock all queues on VHOST_USER_GET_VRING_BASE 2900 * and VHOST_USER_RESET_OWNER, since it is sent when virtio stops 2901 * and device is destroyed. destroy_device waits for queues to be 2902 * inactive, so it is safe. Otherwise taking the access_lock 2903 * would cause a dead lock. 2904 */ 2905 switch (request) { 2906 case VHOST_USER_SET_FEATURES: 2907 case VHOST_USER_SET_PROTOCOL_FEATURES: 2908 case VHOST_USER_SET_OWNER: 2909 case VHOST_USER_SET_MEM_TABLE: 2910 case VHOST_USER_SET_LOG_BASE: 2911 case VHOST_USER_SET_LOG_FD: 2912 case VHOST_USER_SET_VRING_NUM: 2913 case VHOST_USER_SET_VRING_ADDR: 2914 case VHOST_USER_SET_VRING_BASE: 2915 case VHOST_USER_SET_VRING_KICK: 2916 case VHOST_USER_SET_VRING_CALL: 2917 case VHOST_USER_SET_VRING_ERR: 2918 case VHOST_USER_SET_VRING_ENABLE: 2919 case VHOST_USER_SEND_RARP: 2920 case VHOST_USER_NET_SET_MTU: 2921 case VHOST_USER_SET_SLAVE_REQ_FD: 2922 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 2923 vhost_user_lock_all_queue_pairs(dev); 2924 unlock_required = 1; 2925 } 2926 break; 2927 default: 2928 break; 2929 2930 } 2931 2932 handled = false; 2933 if (dev->extern_ops.pre_msg_handle) { 2934 ret = (*dev->extern_ops.pre_msg_handle)(dev->vid, 2935 (void *)&msg); 2936 switch (ret) { 2937 case RTE_VHOST_MSG_RESULT_REPLY: 2938 send_vhost_reply(fd, &msg); 2939 /* Fall-through */ 2940 case RTE_VHOST_MSG_RESULT_ERR: 2941 case RTE_VHOST_MSG_RESULT_OK: 2942 handled = true; 2943 goto skip_to_post_handle; 2944 case RTE_VHOST_MSG_RESULT_NOT_HANDLED: 2945 default: 2946 break; 2947 } 2948 } 2949 2950 if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) { 2951 if (!vhost_message_handlers[request]) 2952 goto skip_to_post_handle; 2953 ret = vhost_message_handlers[request](&dev, &msg, fd); 2954 2955 switch (ret) { 2956 case RTE_VHOST_MSG_RESULT_ERR: 2957 VHOST_LOG_CONFIG(ERR, 2958 "Processing %s failed.\n", 2959 vhost_message_str[request]); 2960 handled = true; 2961 break; 2962 case RTE_VHOST_MSG_RESULT_OK: 2963 VHOST_LOG_CONFIG(DEBUG, 2964 "Processing %s succeeded.\n", 2965 vhost_message_str[request]); 2966 handled = true; 2967 break; 2968 case RTE_VHOST_MSG_RESULT_REPLY: 2969 VHOST_LOG_CONFIG(DEBUG, 2970 "Processing %s succeeded and needs reply.\n", 2971 vhost_message_str[request]); 2972 send_vhost_reply(fd, &msg); 2973 handled = true; 2974 break; 2975 default: 2976 break; 2977 } 2978 } 2979 2980 skip_to_post_handle: 2981 if (ret != RTE_VHOST_MSG_RESULT_ERR && 2982 dev->extern_ops.post_msg_handle) { 2983 ret = (*dev->extern_ops.post_msg_handle)(dev->vid, 2984 (void *)&msg); 2985 switch (ret) { 2986 case RTE_VHOST_MSG_RESULT_REPLY: 2987 send_vhost_reply(fd, &msg); 2988 /* Fall-through */ 2989 case RTE_VHOST_MSG_RESULT_ERR: 2990 case RTE_VHOST_MSG_RESULT_OK: 2991 handled = true; 2992 case RTE_VHOST_MSG_RESULT_NOT_HANDLED: 2993 default: 2994 break; 2995 } 2996 } 2997 2998 if (unlock_required) 2999 vhost_user_unlock_all_queue_pairs(dev); 3000 3001 /* If message was not handled at this stage, treat it as an error */ 3002 if (!handled) { 3003 VHOST_LOG_CONFIG(ERR, 3004 "vhost message (req: %d) was not handled.\n", request); 3005 close_msg_fds(&msg); 3006 ret = RTE_VHOST_MSG_RESULT_ERR; 3007 } 3008 3009 /* 3010 * If the request required a reply that was already sent, 3011 * this optional reply-ack won't be sent as the 3012 * VHOST_USER_NEED_REPLY was cleared in send_vhost_reply(). 3013 */ 3014 if (msg.flags & VHOST_USER_NEED_REPLY) { 3015 msg.payload.u64 = ret == RTE_VHOST_MSG_RESULT_ERR; 3016 msg.size = sizeof(msg.payload.u64); 3017 msg.fd_num = 0; 3018 send_vhost_reply(fd, &msg); 3019 } else if (ret == RTE_VHOST_MSG_RESULT_ERR) { 3020 VHOST_LOG_CONFIG(ERR, 3021 "vhost message handling failed.\n"); 3022 return -1; 3023 } 3024 3025 for (i = 0; i < dev->nr_vring; i++) { 3026 struct vhost_virtqueue *vq = dev->virtqueue[i]; 3027 bool cur_ready = vq_is_ready(dev, vq); 3028 3029 if (cur_ready != (vq && vq->ready)) { 3030 vq->ready = cur_ready; 3031 vhost_user_notify_queue_state(dev, i, cur_ready); 3032 } 3033 } 3034 3035 3036 if (!virtio_is_ready(dev)) 3037 goto out; 3038 3039 /* 3040 * Virtio is now ready. If not done already, it is time 3041 * to notify the application it can process the rings and 3042 * configure the vDPA device if present. 3043 */ 3044 3045 if (!(dev->flags & VIRTIO_DEV_RUNNING)) { 3046 if (dev->notify_ops->new_device(dev->vid) == 0) 3047 dev->flags |= VIRTIO_DEV_RUNNING; 3048 } 3049 3050 vdpa_dev = dev->vdpa_dev; 3051 if (!vdpa_dev) 3052 goto out; 3053 3054 if (!(dev->flags & VIRTIO_DEV_VDPA_CONFIGURED)) { 3055 if (vdpa_dev->ops->dev_conf(dev->vid)) 3056 VHOST_LOG_CONFIG(ERR, 3057 "Failed to configure vDPA device\n"); 3058 else 3059 dev->flags |= VIRTIO_DEV_VDPA_CONFIGURED; 3060 } 3061 3062 out: 3063 return 0; 3064 } 3065 3066 static int process_slave_message_reply(struct virtio_net *dev, 3067 const struct VhostUserMsg *msg) 3068 { 3069 struct VhostUserMsg msg_reply; 3070 int ret; 3071 3072 if ((msg->flags & VHOST_USER_NEED_REPLY) == 0) 3073 return 0; 3074 3075 ret = read_vhost_message(dev->slave_req_fd, &msg_reply); 3076 if (ret <= 0) { 3077 if (ret < 0) 3078 VHOST_LOG_CONFIG(ERR, 3079 "vhost read slave message reply failed\n"); 3080 else 3081 VHOST_LOG_CONFIG(INFO, 3082 "vhost peer closed\n"); 3083 ret = -1; 3084 goto out; 3085 } 3086 3087 ret = 0; 3088 if (msg_reply.request.slave != msg->request.slave) { 3089 VHOST_LOG_CONFIG(ERR, 3090 "Received unexpected msg type (%u), expected %u\n", 3091 msg_reply.request.slave, msg->request.slave); 3092 ret = -1; 3093 goto out; 3094 } 3095 3096 ret = msg_reply.payload.u64 ? -1 : 0; 3097 3098 out: 3099 rte_spinlock_unlock(&dev->slave_req_lock); 3100 return ret; 3101 } 3102 3103 int 3104 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm) 3105 { 3106 int ret; 3107 struct VhostUserMsg msg = { 3108 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG, 3109 .flags = VHOST_USER_VERSION, 3110 .size = sizeof(msg.payload.iotlb), 3111 .payload.iotlb = { 3112 .iova = iova, 3113 .perm = perm, 3114 .type = VHOST_IOTLB_MISS, 3115 }, 3116 }; 3117 3118 ret = send_vhost_message(dev->slave_req_fd, &msg); 3119 if (ret < 0) { 3120 VHOST_LOG_CONFIG(ERR, 3121 "Failed to send IOTLB miss message (%d)\n", 3122 ret); 3123 return ret; 3124 } 3125 3126 return 0; 3127 } 3128 3129 static int 3130 vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply) 3131 { 3132 int ret; 3133 struct VhostUserMsg msg = { 3134 .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG, 3135 .flags = VHOST_USER_VERSION, 3136 .size = 0, 3137 }; 3138 3139 if (need_reply) 3140 msg.flags |= VHOST_USER_NEED_REPLY; 3141 3142 ret = send_vhost_slave_message(dev, &msg); 3143 if (ret < 0) { 3144 VHOST_LOG_CONFIG(ERR, 3145 "Failed to send config change (%d)\n", 3146 ret); 3147 return ret; 3148 } 3149 3150 return process_slave_message_reply(dev, &msg); 3151 } 3152 3153 int 3154 rte_vhost_slave_config_change(int vid, bool need_reply) 3155 { 3156 struct virtio_net *dev; 3157 3158 dev = get_device(vid); 3159 if (!dev) 3160 return -ENODEV; 3161 3162 return vhost_user_slave_config_change(dev, need_reply); 3163 } 3164 3165 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev, 3166 int index, int fd, 3167 uint64_t offset, 3168 uint64_t size) 3169 { 3170 int ret; 3171 struct VhostUserMsg msg = { 3172 .request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG, 3173 .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY, 3174 .size = sizeof(msg.payload.area), 3175 .payload.area = { 3176 .u64 = index & VHOST_USER_VRING_IDX_MASK, 3177 .size = size, 3178 .offset = offset, 3179 }, 3180 }; 3181 3182 if (fd < 0) 3183 msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK; 3184 else { 3185 msg.fds[0] = fd; 3186 msg.fd_num = 1; 3187 } 3188 3189 ret = send_vhost_slave_message(dev, &msg); 3190 if (ret < 0) { 3191 VHOST_LOG_CONFIG(ERR, 3192 "Failed to set host notifier (%d)\n", ret); 3193 return ret; 3194 } 3195 3196 return process_slave_message_reply(dev, &msg); 3197 } 3198 3199 int rte_vhost_host_notifier_ctrl(int vid, uint16_t qid, bool enable) 3200 { 3201 struct virtio_net *dev; 3202 struct rte_vdpa_device *vdpa_dev; 3203 int vfio_device_fd, ret = 0; 3204 uint64_t offset, size; 3205 unsigned int i, q_start, q_last; 3206 3207 dev = get_device(vid); 3208 if (!dev) 3209 return -ENODEV; 3210 3211 vdpa_dev = dev->vdpa_dev; 3212 if (vdpa_dev == NULL) 3213 return -ENODEV; 3214 3215 if (!(dev->features & (1ULL << VIRTIO_F_VERSION_1)) || 3216 !(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)) || 3217 !(dev->protocol_features & 3218 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ)) || 3219 !(dev->protocol_features & 3220 (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) || 3221 !(dev->protocol_features & 3222 (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER))) 3223 return -ENOTSUP; 3224 3225 if (qid == RTE_VHOST_QUEUE_ALL) { 3226 q_start = 0; 3227 q_last = dev->nr_vring - 1; 3228 } else { 3229 if (qid >= dev->nr_vring) 3230 return -EINVAL; 3231 q_start = qid; 3232 q_last = qid; 3233 } 3234 3235 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_vfio_device_fd, -ENOTSUP); 3236 RTE_FUNC_PTR_OR_ERR_RET(vdpa_dev->ops->get_notify_area, -ENOTSUP); 3237 3238 vfio_device_fd = vdpa_dev->ops->get_vfio_device_fd(vid); 3239 if (vfio_device_fd < 0) 3240 return -ENOTSUP; 3241 3242 if (enable) { 3243 for (i = q_start; i <= q_last; i++) { 3244 if (vdpa_dev->ops->get_notify_area(vid, i, &offset, 3245 &size) < 0) { 3246 ret = -ENOTSUP; 3247 goto disable; 3248 } 3249 3250 if (vhost_user_slave_set_vring_host_notifier(dev, i, 3251 vfio_device_fd, offset, size) < 0) { 3252 ret = -EFAULT; 3253 goto disable; 3254 } 3255 } 3256 } else { 3257 disable: 3258 for (i = q_start; i <= q_last; i++) { 3259 vhost_user_slave_set_vring_host_notifier(dev, i, -1, 3260 0, 0); 3261 } 3262 } 3263 3264 return ret; 3265 } 3266