lib/librte_vhost/vhost_user.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39 #include <sys/mman.h>
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42 #include <assert.h>
  43 #ifdef RTE_LIBRTE_VHOST_NUMA
  44 #include <numaif.h>
  45 #endif
  46
  47 #include <rte_common.h>
  48 #include <rte_malloc.h>
  49 #include <rte_log.h>
  50
  51 #include "iotlb.h"
  52 #include "vhost.h"
  53 #include "vhost_user.h"
  54
  55 #define VIRTIO_MIN_MTU 68
  56 #define VIRTIO_MAX_MTU 65535
  57
  58 static const char *vhost_message_str[VHOST_USER_MAX] = {
  59         [VHOST_USER_NONE] = "VHOST_USER_NONE",
  60         [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES",
  61         [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES",
  62         [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER",
  63         [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER",
  64         [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE",
  65         [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE",
  66         [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD",
  67         [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM",
  68         [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR",
  69         [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE",
  70         [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE",
  71         [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK",
  72         [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL",
  73         [VHOST_USER_SET_VRING_ERR]  = "VHOST_USER_SET_VRING_ERR",
  74         [VHOST_USER_GET_PROTOCOL_FEATURES]  = "VHOST_USER_GET_PROTOCOL_FEATURES",
  75         [VHOST_USER_SET_PROTOCOL_FEATURES]  = "VHOST_USER_SET_PROTOCOL_FEATURES",
  76         [VHOST_USER_GET_QUEUE_NUM]  = "VHOST_USER_GET_QUEUE_NUM",
  77         [VHOST_USER_SET_VRING_ENABLE]  = "VHOST_USER_SET_VRING_ENABLE",
  78         [VHOST_USER_SEND_RARP]  = "VHOST_USER_SEND_RARP",
  79         [VHOST_USER_NET_SET_MTU]  = "VHOST_USER_NET_SET_MTU",
  80         [VHOST_USER_SET_SLAVE_REQ_FD]  = "VHOST_USER_SET_SLAVE_REQ_FD",
  81         [VHOST_USER_IOTLB_MSG]  = "VHOST_USER_IOTLB_MSG",
  82 };
  83
  84 static uint64_t
  85 get_blk_size(int fd)
  86 {
  87         struct stat stat;
  88         int ret;
  89
  90         ret = fstat(fd, &stat);
  91         return ret == -1 ? (uint64_t)-1 : (uint64_t)stat.st_blksize;
  92 }
  93
  94 static void
  95 free_mem_region(struct virtio_net *dev)
  96 {
  97         uint32_t i;
  98         struct rte_vhost_mem_region *reg;
  99
 100         if (!dev || !dev->mem)
 101                 return;
 102
 103         for (i = 0; i < dev->mem->nregions; i++) {
 104                 reg = &dev->mem->regions[i];
 105                 if (reg->host_user_addr) {
 106                         munmap(reg->mmap_addr, reg->mmap_size);
 107                         close(reg->fd);
 108                 }
 109         }
 110 }
 111
 112 void
 113 vhost_backend_cleanup(struct virtio_net *dev)
 114 {
 115         if (dev->mem) {
 116                 free_mem_region(dev);
 117                 rte_free(dev->mem);
 118                 dev->mem = NULL;
 119         }
 120
 121         free(dev->guest_pages);
 122         dev->guest_pages = NULL;
 123
 124         if (dev->log_addr) {
 125                 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
 126                 dev->log_addr = 0;
 127         }
 128
 129         if (dev->slave_req_fd >= 0) {
 130                 close(dev->slave_req_fd);
 131                 dev->slave_req_fd = -1;
 132         }
 133 }
 134
 135 /*
 136  * This function just returns success at the moment unless
 137  * the device hasn't been initialised.
 138  */
 139 static int
 140 vhost_user_set_owner(void)
 141 {
 142         return 0;
 143 }
 144
 145 static int
 146 vhost_user_reset_owner(struct virtio_net *dev)
 147 {
 148         if (dev->flags & VIRTIO_DEV_RUNNING) {
 149                 dev->flags &= ~VIRTIO_DEV_RUNNING;
 150                 dev->notify_ops->destroy_device(dev->vid);
 151         }
 152
 153         cleanup_device(dev, 0);
 154         reset_device(dev);
 155         return 0;
 156 }
 157
 158 /*
 159  * The features that we support are requested.
 160  */
 161 static uint64_t
 162 vhost_user_get_features(struct virtio_net *dev)
 163 {
 164         uint64_t features = 0;
 165
 166         rte_vhost_driver_get_features(dev->ifname, &features);
 167         return features;
 168 }
 169
 170 /*
 171  * We receive the negotiated features supported by us and the virtio device.
 172  */
 173 static int
 174 vhost_user_set_features(struct virtio_net *dev, uint64_t features)
 175 {
 176         uint64_t vhost_features = 0;
 177
 178         rte_vhost_driver_get_features(dev->ifname, &vhost_features);
 179         if (features & ~vhost_features) {
 180                 RTE_LOG(ERR, VHOST_CONFIG,
 181                         "(%d) received invalid negotiated features.\n",
 182                         dev->vid);
 183                 return -1;
 184         }
 185
 186         if ((dev->flags & VIRTIO_DEV_RUNNING) && dev->features != features) {
 187                 if (dev->notify_ops->features_changed)
 188                         dev->notify_ops->features_changed(dev->vid, features);
 189         }
 190
 191         dev->features = features;
 192         if (dev->features &
 193                 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
 194                 dev->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
 195         } else {
 196                 dev->vhost_hlen = sizeof(struct virtio_net_hdr);
 197         }
 198         LOG_DEBUG(VHOST_CONFIG,
 199                 "(%d) mergeable RX buffers %s, virtio 1 %s\n",
 200                 dev->vid,
 201                 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
 202                 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
 203
 204         return 0;
 205 }
 206
 207 /*
 208  * The virtio device sends us the size of the descriptor ring.
 209  */
 210 static int
 211 vhost_user_set_vring_num(struct virtio_net *dev,
 212                          VhostUserMsg *msg)
 213 {
 214         struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
 215
 216         vq->size = msg->payload.state.num;
 217
 218         if (dev->dequeue_zero_copy) {
 219                 vq->nr_zmbuf = 0;
 220                 vq->last_zmbuf_idx = 0;
 221                 vq->zmbuf_size = vq->size;
 222                 vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
 223                                          sizeof(struct zcopy_mbuf), 0);
 224                 if (vq->zmbufs == NULL) {
 225                         RTE_LOG(WARNING, VHOST_CONFIG,
 226                                 "failed to allocate mem for zero copy; "
 227                                 "zero copy is force disabled\n");
 228                         dev->dequeue_zero_copy = 0;
 229                 }
 230         }
 231
 232         vq->shadow_used_ring = rte_malloc(NULL,
 233                                 vq->size * sizeof(struct vring_used_elem),
 234                                 RTE_CACHE_LINE_SIZE);
 235         if (!vq->shadow_used_ring) {
 236                 RTE_LOG(ERR, VHOST_CONFIG,
 237                         "failed to allocate memory for shadow used ring.\n");
 238                 return -1;
 239         }
 240
 241         vq->batch_copy_elems = rte_malloc(NULL,
 242                                 vq->size * sizeof(struct batch_copy_elem),
 243                                 RTE_CACHE_LINE_SIZE);
 244         if (!vq->batch_copy_elems) {
 245                 RTE_LOG(ERR, VHOST_CONFIG,
 246                         "failed to allocate memory for batching copy.\n");
 247                 return -1;
 248         }
 249
 250         return 0;
 251 }
 252
 253 /*
 254  * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
 255  * same numa node as the memory of vring descriptor.
 256  */
 257 #ifdef RTE_LIBRTE_VHOST_NUMA
 258 static struct virtio_net*
 259 numa_realloc(struct virtio_net *dev, int index)
 260 {
 261         int oldnode, newnode;
 262         struct virtio_net *old_dev;
 263         struct vhost_virtqueue *old_vq, *vq;
 264         int ret;
 265
 266         old_dev = dev;
 267         vq = old_vq = dev->virtqueue[index];
 268
 269         ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
 270                             MPOL_F_NODE | MPOL_F_ADDR);
 271
 272         /* check if we need to reallocate vq */
 273         ret |= get_mempolicy(&oldnode, NULL, 0, old_vq,
 274                              MPOL_F_NODE | MPOL_F_ADDR);
 275         if (ret) {
 276                 RTE_LOG(ERR, VHOST_CONFIG,
 277                         "Unable to get vq numa information.\n");
 278                 return dev;
 279         }
 280         if (oldnode != newnode) {
 281                 RTE_LOG(INFO, VHOST_CONFIG,
 282                         "reallocate vq from %d to %d node\n", oldnode, newnode);
 283                 vq = rte_malloc_socket(NULL, sizeof(*vq), 0, newnode);
 284                 if (!vq)
 285                         return dev;
 286
 287                 memcpy(vq, old_vq, sizeof(*vq));
 288                 rte_free(old_vq);
 289         }
 290
 291         /* check if we need to reallocate dev */
 292         ret = get_mempolicy(&oldnode, NULL, 0, old_dev,
 293                             MPOL_F_NODE | MPOL_F_ADDR);
 294         if (ret) {
 295                 RTE_LOG(ERR, VHOST_CONFIG,
 296                         "Unable to get dev numa information.\n");
 297                 goto out;
 298         }
 299         if (oldnode != newnode) {
 300                 RTE_LOG(INFO, VHOST_CONFIG,
 301                         "reallocate dev from %d to %d node\n",
 302                         oldnode, newnode);
 303                 dev = rte_malloc_socket(NULL, sizeof(*dev), 0, newnode);
 304                 if (!dev) {
 305                         dev = old_dev;
 306                         goto out;
 307                 }
 308
 309                 memcpy(dev, old_dev, sizeof(*dev));
 310                 rte_free(old_dev);
 311         }
 312
 313 out:
 314         dev->virtqueue[index] = vq;
 315         vhost_devices[dev->vid] = dev;
 316
 317         if (old_vq != vq)
 318                 vhost_user_iotlb_init(dev, index);
 319
 320         return dev;
 321 }
 322 #else
 323 static struct virtio_net*
 324 numa_realloc(struct virtio_net *dev, int index __rte_unused)
 325 {
 326         return dev;
 327 }
 328 #endif
 329
 330 /* Converts QEMU virtual address to Vhost virtual address. */
 331 static uint64_t
 332 qva_to_vva(struct virtio_net *dev, uint64_t qva)
 333 {
 334         struct rte_vhost_mem_region *reg;
 335         uint32_t i;
 336
 337         /* Find the region where the address lives. */
 338         for (i = 0; i < dev->mem->nregions; i++) {
 339                 reg = &dev->mem->regions[i];
 340
 341                 if (qva >= reg->guest_user_addr &&
 342                     qva <  reg->guest_user_addr + reg->size) {
 343                         return qva - reg->guest_user_addr +
 344                                reg->host_user_addr;
 345                 }
 346         }
 347
 348         return 0;
 349 }
 350
 351
 352 /*
 353  * Converts ring address to Vhost virtual address.
 354  * If IOMMU is enabled, the ring address is a guest IO virtual address,
 355  * else it is a QEMU virtual address.
 356  */
 357 static uint64_t
 358 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
 359                 uint64_t ra, uint64_t size)
 360 {
 361         if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
 362                 uint64_t vva;
 363
 364                 vva = vhost_user_iotlb_cache_find(vq, ra,
 365                                         &size, VHOST_ACCESS_RW);
 366                 if (!vva)
 367                         vhost_user_iotlb_miss(dev, ra, VHOST_ACCESS_RW);
 368
 369                 return vva;
 370         }
 371
 372         return qva_to_vva(dev, ra);
 373 }
 374
 375 /*
 376  * The virtio device sends us the desc, used and avail ring addresses.
 377  * This function then converts these to our address space.
 378  */
 379 static int
 380 vhost_user_set_vring_addr(struct virtio_net *dev, VhostUserMsg *msg)
 381 {
 382         struct vhost_virtqueue *vq;
 383         struct vhost_vring_addr *addr = &msg->payload.addr;
 384
 385         if (dev->mem == NULL)
 386                 return -1;
 387
 388         /* addr->index refers to the queue index. The txq 1, rxq is 0. */
 389         vq = dev->virtqueue[msg->payload.addr.index];
 390
 391         /*
 392          * Rings addresses should not be interpreted as long as the ring is not
 393          * started and enabled
 394          */
 395         memcpy(&vq->ring_addrs, addr, sizeof(*addr));
 396
 397         vring_invalidate(dev, vq);
 398
 399         return 0;
 400 }
 401
 402 static struct virtio_net *
 403 translate_ring_addresses(struct virtio_net *dev, int vq_index)
 404 {
 405         struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
 406         struct vhost_vring_addr *addr = &vq->ring_addrs;
 407
 408         /* The addresses are converted from QEMU virtual to Vhost virtual. */
 409         if (vq->desc && vq->avail && vq->used)
 410                 return dev;
 411
 412         vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
 413                         vq, addr->desc_user_addr, sizeof(struct vring_desc));
 414         if (vq->desc == 0) {
 415                 RTE_LOG(DEBUG, VHOST_CONFIG,
 416                         "(%d) failed to find desc ring address.\n",
 417                         dev->vid);
 418                 return dev;
 419         }
 420
 421         dev = numa_realloc(dev, vq_index);
 422         vq = dev->virtqueue[vq_index];
 423         addr = &vq->ring_addrs;
 424
 425         vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
 426                         vq, addr->avail_user_addr, sizeof(struct vring_avail));
 427         if (vq->avail == 0) {
 428                 RTE_LOG(DEBUG, VHOST_CONFIG,
 429                         "(%d) failed to find avail ring address.\n",
 430                         dev->vid);
 431                 return dev;
 432         }
 433
 434         vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
 435                         vq, addr->used_user_addr, sizeof(struct vring_used));
 436         if (vq->used == 0) {
 437                 RTE_LOG(DEBUG, VHOST_CONFIG,
 438                         "(%d) failed to find used ring address.\n",
 439                         dev->vid);
 440                 return dev;
 441         }
 442
 443         if (vq->last_used_idx != vq->used->idx) {
 444                 RTE_LOG(WARNING, VHOST_CONFIG,
 445                         "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
 446                         "some packets maybe resent for Tx and dropped for Rx\n",
 447                         vq->last_used_idx, vq->used->idx);
 448                 vq->last_used_idx  = vq->used->idx;
 449                 vq->last_avail_idx = vq->used->idx;
 450         }
 451
 452         vq->log_guest_addr = addr->log_guest_addr;
 453
 454         LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
 455                         dev->vid, vq->desc);
 456         LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
 457                         dev->vid, vq->avail);
 458         LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
 459                         dev->vid, vq->used);
 460         LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
 461                         dev->vid, vq->log_guest_addr);
 462
 463         return dev;
 464 }
 465
 466 /*
 467  * The virtio device sends us the available ring last used index.
 468  */
 469 static int
 470 vhost_user_set_vring_base(struct virtio_net *dev,
 471                           VhostUserMsg *msg)
 472 {
 473         dev->virtqueue[msg->payload.state.index]->last_used_idx  =
 474                         msg->payload.state.num;
 475         dev->virtqueue[msg->payload.state.index]->last_avail_idx =
 476                         msg->payload.state.num;
 477
 478         return 0;
 479 }
 480
 481 static void
 482 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
 483                    uint64_t host_phys_addr, uint64_t size)
 484 {
 485         struct guest_page *page, *last_page;
 486
 487         if (dev->nr_guest_pages == dev->max_guest_pages) {
 488                 dev->max_guest_pages *= 2;
 489                 dev->guest_pages = realloc(dev->guest_pages,
 490                                         dev->max_guest_pages * sizeof(*page));
 491         }
 492
 493         if (dev->nr_guest_pages > 0) {
 494                 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
 495                 /* merge if the two pages are continuous */
 496                 if (host_phys_addr == last_page->host_phys_addr +
 497                                       last_page->size) {
 498                         last_page->size += size;
 499                         return;
 500                 }
 501         }
 502
 503         page = &dev->guest_pages[dev->nr_guest_pages++];
 504         page->guest_phys_addr = guest_phys_addr;
 505         page->host_phys_addr  = host_phys_addr;
 506         page->size = size;
 507 }
 508
 509 static void
 510 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
 511                 uint64_t page_size)
 512 {
 513         uint64_t reg_size = reg->size;
 514         uint64_t host_user_addr  = reg->host_user_addr;
 515         uint64_t guest_phys_addr = reg->guest_phys_addr;
 516         uint64_t host_phys_addr;
 517         uint64_t size;
 518
 519         host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)host_user_addr);
 520         size = page_size - (guest_phys_addr & (page_size - 1));
 521         size = RTE_MIN(size, reg_size);
 522
 523         add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
 524         host_user_addr  += size;
 525         guest_phys_addr += size;
 526         reg_size -= size;
 527
 528         while (reg_size > 0) {
 529                 size = RTE_MIN(reg_size, page_size);
 530                 host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)
 531                                                   host_user_addr);
 532                 add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
 533
 534                 host_user_addr  += size;
 535                 guest_phys_addr += size;
 536                 reg_size -= size;
 537         }
 538 }
 539
 540 #ifdef RTE_LIBRTE_VHOST_DEBUG
 541 /* TODO: enable it only in debug mode? */
 542 static void
 543 dump_guest_pages(struct virtio_net *dev)
 544 {
 545         uint32_t i;
 546         struct guest_page *page;
 547
 548         for (i = 0; i < dev->nr_guest_pages; i++) {
 549                 page = &dev->guest_pages[i];
 550
 551                 RTE_LOG(INFO, VHOST_CONFIG,
 552                         "guest physical page region %u\n"
 553                         "\t guest_phys_addr: %" PRIx64 "\n"
 554                         "\t host_phys_addr : %" PRIx64 "\n"
 555                         "\t size           : %" PRIx64 "\n",
 556                         i,
 557                         page->guest_phys_addr,
 558                         page->host_phys_addr,
 559                         page->size);
 560         }
 561 }
 562 #else
 563 #define dump_guest_pages(dev)
 564 #endif
 565
 566 static int
 567 vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)
 568 {
 569         struct VhostUserMemory memory = pmsg->payload.memory;
 570         struct rte_vhost_mem_region *reg;
 571         void *mmap_addr;
 572         uint64_t mmap_size;
 573         uint64_t mmap_offset;
 574         uint64_t alignment;
 575         uint32_t i;
 576         int fd;
 577
 578         if (dev->mem) {
 579                 free_mem_region(dev);
 580                 rte_free(dev->mem);
 581                 dev->mem = NULL;
 582         }
 583
 584         dev->nr_guest_pages = 0;
 585         if (!dev->guest_pages) {
 586                 dev->max_guest_pages = 8;
 587                 dev->guest_pages = malloc(dev->max_guest_pages *
 588                                                 sizeof(struct guest_page));
 589                 if (dev->guest_pages == NULL) {
 590                         RTE_LOG(ERR, VHOST_CONFIG,
 591                                 "(%d) failed to allocate memory "
 592                                 "for dev->guest_pages\n",
 593                                 dev->vid);
 594                         return -1;
 595                 }
 596         }
 597
 598         dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
 599                 sizeof(struct rte_vhost_mem_region) * memory.nregions, 0);
 600         if (dev->mem == NULL) {
 601                 RTE_LOG(ERR, VHOST_CONFIG,
 602                         "(%d) failed to allocate memory for dev->mem\n",
 603                         dev->vid);
 604                 return -1;
 605         }
 606         dev->mem->nregions = memory.nregions;
 607
 608         for (i = 0; i < memory.nregions; i++) {
 609                 fd  = pmsg->fds[i];
 610                 reg = &dev->mem->regions[i];
 611
 612                 reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
 613                 reg->guest_user_addr = memory.regions[i].userspace_addr;
 614                 reg->size            = memory.regions[i].memory_size;
 615                 reg->fd              = fd;
 616
 617                 mmap_offset = memory.regions[i].mmap_offset;
 618                 mmap_size   = reg->size + mmap_offset;
 619
 620                 /* mmap() without flag of MAP_ANONYMOUS, should be called
 621                  * with length argument aligned with hugepagesz at older
 622                  * longterm version Linux, like 2.6.32 and 3.2.72, or
 623                  * mmap() will fail with EINVAL.
 624                  *
 625                  * to avoid failure, make sure in caller to keep length
 626                  * aligned.
 627                  */
 628                 alignment = get_blk_size(fd);
 629                 if (alignment == (uint64_t)-1) {
 630                         RTE_LOG(ERR, VHOST_CONFIG,
 631                                 "couldn't get hugepage size through fstat\n");
 632                         goto err_mmap;
 633                 }
 634                 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
 635
 636                 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
 637                                  MAP_SHARED | MAP_POPULATE, fd, 0);
 638
 639                 if (mmap_addr == MAP_FAILED) {
 640                         RTE_LOG(ERR, VHOST_CONFIG,
 641                                 "mmap region %u failed.\n", i);
 642                         goto err_mmap;
 643                 }
 644
 645                 reg->mmap_addr = mmap_addr;
 646                 reg->mmap_size = mmap_size;
 647                 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
 648                                       mmap_offset;
 649
 650                 if (dev->dequeue_zero_copy)
 651                         add_guest_pages(dev, reg, alignment);
 652
 653                 RTE_LOG(INFO, VHOST_CONFIG,
 654                         "guest memory region %u, size: 0x%" PRIx64 "\n"
 655                         "\t guest physical addr: 0x%" PRIx64 "\n"
 656                         "\t guest virtual  addr: 0x%" PRIx64 "\n"
 657                         "\t host  virtual  addr: 0x%" PRIx64 "\n"
 658                         "\t mmap addr : 0x%" PRIx64 "\n"
 659                         "\t mmap size : 0x%" PRIx64 "\n"
 660                         "\t mmap align: 0x%" PRIx64 "\n"
 661                         "\t mmap off  : 0x%" PRIx64 "\n",
 662                         i, reg->size,
 663                         reg->guest_phys_addr,
 664                         reg->guest_user_addr,
 665                         reg->host_user_addr,
 666                         (uint64_t)(uintptr_t)mmap_addr,
 667                         mmap_size,
 668                         alignment,
 669                         mmap_offset);
 670         }
 671
 672         dump_guest_pages(dev);
 673
 674         return 0;
 675
 676 err_mmap:
 677         free_mem_region(dev);
 678         rte_free(dev->mem);
 679         dev->mem = NULL;
 680         return -1;
 681 }
 682
 683 static int
 684 vq_is_ready(struct vhost_virtqueue *vq)
 685 {
 686         return vq && vq->desc && vq->avail && vq->used &&
 687                vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
 688                vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
 689 }
 690
 691 static int
 692 virtio_is_ready(struct virtio_net *dev)
 693 {
 694         struct vhost_virtqueue *vq;
 695         uint32_t i;
 696
 697         if (dev->nr_vring == 0)
 698                 return 0;
 699
 700         for (i = 0; i < dev->nr_vring; i++) {
 701                 vq = dev->virtqueue[i];
 702
 703                 if (!vq_is_ready(vq))
 704                         return 0;
 705         }
 706
 707         RTE_LOG(INFO, VHOST_CONFIG,
 708                 "virtio is now ready for processing.\n");
 709         return 1;
 710 }
 711
 712 static void
 713 vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
 714 {
 715         struct vhost_vring_file file;
 716         struct vhost_virtqueue *vq;
 717
 718         file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
 719         if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
 720                 file.fd = VIRTIO_INVALID_EVENTFD;
 721         else
 722                 file.fd = pmsg->fds[0];
 723         RTE_LOG(INFO, VHOST_CONFIG,
 724                 "vring call idx:%d file:%d\n", file.index, file.fd);
 725
 726         vq = dev->virtqueue[file.index];
 727         if (vq->callfd >= 0)
 728                 close(vq->callfd);
 729
 730         vq->callfd = file.fd;
 731 }
 732
 733 static void
 734 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
 735 {
 736         struct vhost_vring_file file;
 737         struct vhost_virtqueue *vq;
 738         struct virtio_net *dev = *pdev;
 739
 740         file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
 741         if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
 742                 file.fd = VIRTIO_INVALID_EVENTFD;
 743         else
 744                 file.fd = pmsg->fds[0];
 745         RTE_LOG(INFO, VHOST_CONFIG,
 746                 "vring kick idx:%d file:%d\n", file.index, file.fd);
 747
 748         /*
 749          * Interpret ring addresses only when ring is started and enabled.
 750          * This is now if protocol features aren't supported.
 751          */
 752         if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
 753                 *pdev = dev = translate_ring_addresses(dev, file.index);
 754                 if (!dev)
 755                         return;
 756         }
 757
 758         vq = dev->virtqueue[file.index];
 759
 760         /*
 761          * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
 762          * the ring starts already enabled. Otherwise, it is enabled via
 763          * the SET_VRING_ENABLE message.
 764          */
 765         if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)))
 766                 vq->enabled = 1;
 767
 768         if (vq->kickfd >= 0)
 769                 close(vq->kickfd);
 770         vq->kickfd = file.fd;
 771 }
 772
 773 static void
 774 free_zmbufs(struct vhost_virtqueue *vq)
 775 {
 776         struct zcopy_mbuf *zmbuf, *next;
 777
 778         for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
 779              zmbuf != NULL; zmbuf = next) {
 780                 next = TAILQ_NEXT(zmbuf, next);
 781
 782                 rte_pktmbuf_free(zmbuf->mbuf);
 783                 TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
 784         }
 785
 786         rte_free(vq->zmbufs);
 787 }
 788
 789 /*
 790  * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
 791  */
 792 static int
 793 vhost_user_get_vring_base(struct virtio_net *dev,
 794                           VhostUserMsg *msg)
 795 {
 796         struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
 797
 798         /* We have to stop the queue (virtio) if it is running. */
 799         if (dev->flags & VIRTIO_DEV_RUNNING) {
 800                 dev->flags &= ~VIRTIO_DEV_RUNNING;
 801                 dev->notify_ops->destroy_device(dev->vid);
 802         }
 803
 804         dev->flags &= ~VIRTIO_DEV_READY;
 805
 806         /* Here we are safe to get the last used index */
 807         msg->payload.state.num = vq->last_used_idx;
 808
 809         RTE_LOG(INFO, VHOST_CONFIG,
 810                 "vring base idx:%d file:%d\n", msg->payload.state.index,
 811                 msg->payload.state.num);
 812         /*
 813          * Based on current qemu vhost-user implementation, this message is
 814          * sent and only sent in vhost_vring_stop.
 815          * TODO: cleanup the vring, it isn't usable since here.
 816          */
 817         if (vq->kickfd >= 0)
 818                 close(vq->kickfd);
 819
 820         vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
 821
 822         if (dev->dequeue_zero_copy)
 823                 free_zmbufs(vq);
 824         rte_free(vq->shadow_used_ring);
 825         vq->shadow_used_ring = NULL;
 826
 827         rte_free(vq->batch_copy_elems);
 828         vq->batch_copy_elems = NULL;
 829
 830         return 0;
 831 }
 832
 833 /*
 834  * when virtio queues are ready to work, qemu will send us to
 835  * enable the virtio queue pair.
 836  */
 837 static int
 838 vhost_user_set_vring_enable(struct virtio_net **pdev,
 839                             VhostUserMsg *msg)
 840 {
 841         struct virtio_net *dev = *pdev;
 842         int enable = (int)msg->payload.state.num;
 843
 844         RTE_LOG(INFO, VHOST_CONFIG,
 845                 "set queue enable: %d to qp idx: %d\n",
 846                 enable, msg->payload.state.index);
 847
 848         /*
 849          * Interpret ring addresses only when ring is started and enabled.
 850          * This is now if protocol features are supported.
 851          */
 852         if (enable && (dev->features &
 853                                 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
 854                 dev = translate_ring_addresses(dev, msg->payload.state.index);
 855                 if (!dev)
 856                         return -1;
 857
 858                 *pdev = dev;
 859         }
 860
 861         if (dev->notify_ops->vring_state_changed)
 862                 dev->notify_ops->vring_state_changed(dev->vid,
 863                                 msg->payload.state.index, enable);
 864
 865         dev->virtqueue[msg->payload.state.index]->enabled = enable;
 866
 867         return 0;
 868 }
 869
 870 static void
 871 vhost_user_set_protocol_features(struct virtio_net *dev,
 872                                  uint64_t protocol_features)
 873 {
 874         if (protocol_features & ~VHOST_USER_PROTOCOL_FEATURES)
 875                 return;
 876
 877         dev->protocol_features = protocol_features;
 878 }
 879
 880 static int
 881 vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
 882 {
 883         int fd = msg->fds[0];
 884         uint64_t size, off;
 885         void *addr;
 886
 887         if (fd < 0) {
 888                 RTE_LOG(ERR, VHOST_CONFIG, "invalid log fd: %d\n", fd);
 889                 return -1;
 890         }
 891
 892         if (msg->size != sizeof(VhostUserLog)) {
 893                 RTE_LOG(ERR, VHOST_CONFIG,
 894                         "invalid log base msg size: %"PRId32" != %d\n",
 895                         msg->size, (int)sizeof(VhostUserLog));
 896                 return -1;
 897         }
 898
 899         size = msg->payload.log.mmap_size;
 900         off  = msg->payload.log.mmap_offset;
 901         RTE_LOG(INFO, VHOST_CONFIG,
 902                 "log mmap size: %"PRId64", offset: %"PRId64"\n",
 903                 size, off);
 904
 905         /*
 906          * mmap from 0 to workaround a hugepage mmap bug: mmap will
 907          * fail when offset is not page size aligned.
 908          */
 909         addr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
 910         close(fd);
 911         if (addr == MAP_FAILED) {
 912                 RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");
 913                 return -1;
 914         }
 915
 916         /*
 917          * Free previously mapped log memory on occasionally
 918          * multiple VHOST_USER_SET_LOG_BASE.
 919          */
 920         if (dev->log_addr) {
 921                 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
 922         }
 923         dev->log_addr = (uint64_t)(uintptr_t)addr;
 924         dev->log_base = dev->log_addr + off;
 925         dev->log_size = size;
 926
 927         return 0;
 928 }
 929
 930 /*
 931  * An rarp packet is constructed and broadcasted to notify switches about
 932  * the new location of the migrated VM, so that packets from outside will
 933  * not be lost after migration.
 934  *
 935  * However, we don't actually "send" a rarp packet here, instead, we set
 936  * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
 937  */
 938 static int
 939 vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
 940 {
 941         uint8_t *mac = (uint8_t *)&msg->payload.u64;
 942
 943         RTE_LOG(DEBUG, VHOST_CONFIG,
 944                 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
 945                 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 946         memcpy(dev->mac.addr_bytes, mac, 6);
 947
 948         /*
 949          * Set the flag to inject a RARP broadcast packet at
 950          * rte_vhost_dequeue_burst().
 951          *
 952          * rte_smp_wmb() is for making sure the mac is copied
 953          * before the flag is set.
 954          */
 955         rte_smp_wmb();
 956         rte_atomic16_set(&dev->broadcast_rarp, 1);
 957
 958         return 0;
 959 }
 960
 961 static int
 962 vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
 963 {
 964         if (msg->payload.u64 < VIRTIO_MIN_MTU ||
 965                         msg->payload.u64 > VIRTIO_MAX_MTU) {
 966                 RTE_LOG(ERR, VHOST_CONFIG, "Invalid MTU size (%"PRIu64")\n",
 967                                 msg->payload.u64);
 968
 969                 return -1;
 970         }
 971
 972         dev->mtu = msg->payload.u64;
 973
 974         return 0;
 975 }
 976
 977 static int
 978 vhost_user_set_req_fd(struct virtio_net *dev, struct VhostUserMsg *msg)
 979 {
 980         int fd = msg->fds[0];
 981
 982         if (fd < 0) {
 983                 RTE_LOG(ERR, VHOST_CONFIG,
 984                                 "Invalid file descriptor for slave channel (%d)\n",
 985                                 fd);
 986                 return -1;
 987         }
 988
 989         dev->slave_req_fd = fd;
 990
 991         return 0;
 992 }
 993
 994 static int
 995 is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
 996 {
 997         struct vhost_vring_addr *ra;
 998         uint64_t start, end;
 999
1000         start = imsg->iova;
1001         end = start + imsg->size;
1002
1003         ra = &vq->ring_addrs;
1004         if (ra->desc_user_addr >= start && ra->desc_user_addr < end)
1005                 return 1;
1006         if (ra->avail_user_addr >= start && ra->avail_user_addr < end)
1007                 return 1;
1008         if (ra->used_user_addr >= start && ra->used_user_addr < end)
1009                 return 1;
1010
1011         return 0;
1012 }
1013
1014 static int
1015 is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
1016                                 struct vhost_iotlb_msg *imsg)
1017 {
1018         uint64_t istart, iend, vstart, vend;
1019
1020         istart = imsg->iova;
1021         iend = istart + imsg->size - 1;
1022
1023         vstart = (uintptr_t)vq->desc;
1024         vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
1025         if (vstart <= iend && istart <= vend)
1026                 return 1;
1027
1028         vstart = (uintptr_t)vq->avail;
1029         vend = vstart + sizeof(struct vring_avail);
1030         vend += sizeof(uint16_t) * vq->size - 1;
1031         if (vstart <= iend && istart <= vend)
1032                 return 1;
1033
1034         vstart = (uintptr_t)vq->used;
1035         vend = vstart + sizeof(struct vring_used);
1036         vend += sizeof(struct vring_used_elem) * vq->size - 1;
1037         if (vstart <= iend && istart <= vend)
1038                 return 1;
1039
1040         return 0;
1041 }
1042
1043 static int
1044 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg)
1045 {
1046         struct virtio_net *dev = *pdev;
1047         struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
1048         uint16_t i;
1049         uint64_t vva;
1050
1051         switch (imsg->type) {
1052         case VHOST_IOTLB_UPDATE:
1053                 vva = qva_to_vva(dev, imsg->uaddr);
1054                 if (!vva)
1055                         return -1;
1056
1057                 for (i = 0; i < dev->nr_vring; i++) {
1058                         struct vhost_virtqueue *vq = dev->virtqueue[i];
1059
1060                         vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
1061                                         imsg->size, imsg->perm);
1062
1063                         if (is_vring_iotlb_update(vq, imsg))
1064                                 *pdev = dev = translate_ring_addresses(dev, i);
1065                 }
1066                 break;
1067         case VHOST_IOTLB_INVALIDATE:
1068                 for (i = 0; i < dev->nr_vring; i++) {
1069                         struct vhost_virtqueue *vq = dev->virtqueue[i];
1070
1071                         vhost_user_iotlb_cache_remove(vq, imsg->iova,
1072                                         imsg->size);
1073
1074                         if (is_vring_iotlb_invalidate(vq, imsg))
1075                                 vring_invalidate(dev, vq);
1076                 }
1077                 break;
1078         default:
1079                 RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
1080                                 imsg->type);
1081                 return -1;
1082         }
1083
1084         return 0;
1085 }
1086
1087 /* return bytes# of read on success or negative val on failure. */
1088 static int
1089 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
1090 {
1091         int ret;
1092
1093         ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
1094                 msg->fds, VHOST_MEMORY_MAX_NREGIONS);
1095         if (ret <= 0)
1096                 return ret;
1097
1098         if (msg && msg->size) {
1099                 if (msg->size > sizeof(msg->payload)) {
1100                         RTE_LOG(ERR, VHOST_CONFIG,
1101                                 "invalid msg size: %d\n", msg->size);
1102                         return -1;
1103                 }
1104                 ret = read(sockfd, &msg->payload, msg->size);
1105                 if (ret <= 0)
1106                         return ret;
1107                 if (ret != (int)msg->size) {
1108                         RTE_LOG(ERR, VHOST_CONFIG,
1109                                 "read control message failed\n");
1110                         return -1;
1111                 }
1112         }
1113
1114         return ret;
1115 }
1116
1117 static int
1118 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
1119 {
1120         if (!msg)
1121                 return 0;
1122
1123         return send_fd_message(sockfd, (char *)msg,
1124                 VHOST_USER_HDR_SIZE + msg->size, NULL, 0);
1125 }
1126
1127 static int
1128 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
1129 {
1130         if (!msg)
1131                 return 0;
1132
1133         msg->flags &= ~VHOST_USER_VERSION_MASK;
1134         msg->flags &= ~VHOST_USER_NEED_REPLY;
1135         msg->flags |= VHOST_USER_VERSION;
1136         msg->flags |= VHOST_USER_REPLY_MASK;
1137
1138         return send_vhost_message(sockfd, msg);
1139 }
1140
1141 /*
1142  * Allocate a queue pair if it hasn't been allocated yet
1143  */
1144 static int
1145 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, VhostUserMsg *msg)
1146 {
1147         uint16_t vring_idx;
1148
1149         switch (msg->request.master) {
1150         case VHOST_USER_SET_VRING_KICK:
1151         case VHOST_USER_SET_VRING_CALL:
1152         case VHOST_USER_SET_VRING_ERR:
1153                 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1154                 break;
1155         case VHOST_USER_SET_VRING_NUM:
1156         case VHOST_USER_SET_VRING_BASE:
1157         case VHOST_USER_SET_VRING_ENABLE:
1158                 vring_idx = msg->payload.state.index;
1159                 break;
1160         case VHOST_USER_SET_VRING_ADDR:
1161                 vring_idx = msg->payload.addr.index;
1162                 break;
1163         default:
1164                 return 0;
1165         }
1166
1167         if (vring_idx >= VHOST_MAX_VRING) {
1168                 RTE_LOG(ERR, VHOST_CONFIG,
1169                         "invalid vring index: %u\n", vring_idx);
1170                 return -1;
1171         }
1172
1173         if (dev->virtqueue[vring_idx])
1174                 return 0;
1175
1176         return alloc_vring_queue(dev, vring_idx);
1177 }
1178
1179 int
1180 vhost_user_msg_handler(int vid, int fd)
1181 {
1182         struct virtio_net *dev;
1183         struct VhostUserMsg msg;
1184         int ret;
1185
1186         dev = get_device(vid);
1187         if (dev == NULL)
1188                 return -1;
1189
1190         if (!dev->notify_ops) {
1191                 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
1192                 if (!dev->notify_ops) {
1193                         RTE_LOG(ERR, VHOST_CONFIG,
1194                                 "failed to get callback ops for driver %s\n",
1195                                 dev->ifname);
1196                         return -1;
1197                 }
1198         }
1199
1200         ret = read_vhost_message(fd, &msg);
1201         if (ret <= 0 || msg.request.master >= VHOST_USER_MAX) {
1202                 if (ret < 0)
1203                         RTE_LOG(ERR, VHOST_CONFIG,
1204                                 "vhost read message failed\n");
1205                 else if (ret == 0)
1206                         RTE_LOG(INFO, VHOST_CONFIG,
1207                                 "vhost peer closed\n");
1208                 else
1209                         RTE_LOG(ERR, VHOST_CONFIG,
1210                                 "vhost read incorrect message\n");
1211
1212                 return -1;
1213         }
1214
1215         ret = 0;
1216         if (msg.request.master != VHOST_USER_IOTLB_MSG)
1217                 RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
1218                         vhost_message_str[msg.request.master]);
1219         else
1220                 RTE_LOG(DEBUG, VHOST_CONFIG, "read message %s\n",
1221                         vhost_message_str[msg.request.master]);
1222
1223         ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
1224         if (ret < 0) {
1225                 RTE_LOG(ERR, VHOST_CONFIG,
1226                         "failed to alloc queue\n");
1227                 return -1;
1228         }
1229
1230         switch (msg.request.master) {
1231         case VHOST_USER_GET_FEATURES:
1232                 msg.payload.u64 = vhost_user_get_features(dev);
1233                 msg.size = sizeof(msg.payload.u64);
1234                 send_vhost_reply(fd, &msg);
1235                 break;
1236         case VHOST_USER_SET_FEATURES:
1237                 vhost_user_set_features(dev, msg.payload.u64);
1238                 break;
1239
1240         case VHOST_USER_GET_PROTOCOL_FEATURES:
1241                 msg.payload.u64 = VHOST_USER_PROTOCOL_FEATURES;
1242                 msg.size = sizeof(msg.payload.u64);
1243                 send_vhost_reply(fd, &msg);
1244                 break;
1245         case VHOST_USER_SET_PROTOCOL_FEATURES:
1246                 vhost_user_set_protocol_features(dev, msg.payload.u64);
1247                 break;
1248
1249         case VHOST_USER_SET_OWNER:
1250                 vhost_user_set_owner();
1251                 break;
1252         case VHOST_USER_RESET_OWNER:
1253                 vhost_user_reset_owner(dev);
1254                 break;
1255
1256         case VHOST_USER_SET_MEM_TABLE:
1257                 ret = vhost_user_set_mem_table(dev, &msg);
1258                 break;
1259
1260         case VHOST_USER_SET_LOG_BASE:
1261                 vhost_user_set_log_base(dev, &msg);
1262
1263                 /* it needs a reply */
1264                 msg.size = sizeof(msg.payload.u64);
1265                 send_vhost_reply(fd, &msg);
1266                 break;
1267         case VHOST_USER_SET_LOG_FD:
1268                 close(msg.fds[0]);
1269                 RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
1270                 break;
1271
1272         case VHOST_USER_SET_VRING_NUM:
1273                 vhost_user_set_vring_num(dev, &msg);
1274                 break;
1275         case VHOST_USER_SET_VRING_ADDR:
1276                 vhost_user_set_vring_addr(dev, &msg);
1277                 break;
1278         case VHOST_USER_SET_VRING_BASE:
1279                 vhost_user_set_vring_base(dev, &msg);
1280                 break;
1281
1282         case VHOST_USER_GET_VRING_BASE:
1283                 vhost_user_get_vring_base(dev, &msg);
1284                 msg.size = sizeof(msg.payload.state);
1285                 send_vhost_reply(fd, &msg);
1286                 break;
1287
1288         case VHOST_USER_SET_VRING_KICK:
1289                 vhost_user_set_vring_kick(&dev, &msg);
1290                 break;
1291         case VHOST_USER_SET_VRING_CALL:
1292                 vhost_user_set_vring_call(dev, &msg);
1293                 break;
1294
1295         case VHOST_USER_SET_VRING_ERR:
1296                 if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1297                         close(msg.fds[0]);
1298                 RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
1299                 break;
1300
1301         case VHOST_USER_GET_QUEUE_NUM:
1302                 msg.payload.u64 = VHOST_MAX_QUEUE_PAIRS;
1303                 msg.size = sizeof(msg.payload.u64);
1304                 send_vhost_reply(fd, &msg);
1305                 break;
1306
1307         case VHOST_USER_SET_VRING_ENABLE:
1308                 vhost_user_set_vring_enable(&dev, &msg);
1309                 break;
1310         case VHOST_USER_SEND_RARP:
1311                 vhost_user_send_rarp(dev, &msg);
1312                 break;
1313
1314         case VHOST_USER_NET_SET_MTU:
1315                 ret = vhost_user_net_set_mtu(dev, &msg);
1316                 break;
1317
1318         case VHOST_USER_SET_SLAVE_REQ_FD:
1319                 ret = vhost_user_set_req_fd(dev, &msg);
1320                 break;
1321
1322         case VHOST_USER_IOTLB_MSG:
1323                 ret = vhost_user_iotlb_msg(&dev, &msg);
1324                 break;
1325
1326         default:
1327                 ret = -1;
1328                 break;
1329
1330         }
1331
1332         if (msg.flags & VHOST_USER_NEED_REPLY) {
1333                 msg.payload.u64 = !!ret;
1334                 msg.size = sizeof(msg.payload.u64);
1335                 send_vhost_reply(fd, &msg);
1336         }
1337
1338         if (!(dev->flags & VIRTIO_DEV_RUNNING) && virtio_is_ready(dev)) {
1339                 dev->flags |= VIRTIO_DEV_READY;
1340
1341                 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
1342                         if (dev->dequeue_zero_copy) {
1343                                 RTE_LOG(INFO, VHOST_CONFIG,
1344                                                 "dequeue zero copy is enabled\n");
1345                         }
1346
1347                         if (dev->notify_ops->new_device(dev->vid) == 0)
1348                                 dev->flags |= VIRTIO_DEV_RUNNING;
1349                 }
1350         }
1351
1352         return 0;
1353 }
1354
1355 int
1356 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
1357 {
1358         int ret;
1359         struct VhostUserMsg msg = {
1360                 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
1361                 .flags = VHOST_USER_VERSION,
1362                 .size = sizeof(msg.payload.iotlb),
1363                 .payload.iotlb = {
1364                         .iova = iova,
1365                         .perm = perm,
1366                         .type = VHOST_IOTLB_MISS,
1367                 },
1368         };
1369
1370         ret = send_vhost_message(dev->slave_req_fd, &msg);
1371         if (ret < 0) {
1372                 RTE_LOG(ERR, VHOST_CONFIG,
1373                                 "Failed to send IOTLB miss message (%d)\n",
1374                                 ret);
1375                 return ret;
1376         }
1377
1378         return 0;
1379 }