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         return dev;
 318 }
 319 #else
 320 static struct virtio_net*
 321 numa_realloc(struct virtio_net *dev, int index __rte_unused)
 322 {
 323         return dev;
 324 }
 325 #endif
 326
 327 /* Converts QEMU virtual address to Vhost virtual address. */
 328 static uint64_t
 329 qva_to_vva(struct virtio_net *dev, uint64_t qva)
 330 {
 331         struct rte_vhost_mem_region *reg;
 332         uint32_t i;
 333
 334         /* Find the region where the address lives. */
 335         for (i = 0; i < dev->mem->nregions; i++) {
 336                 reg = &dev->mem->regions[i];
 337
 338                 if (qva >= reg->guest_user_addr &&
 339                     qva <  reg->guest_user_addr + reg->size) {
 340                         return qva - reg->guest_user_addr +
 341                                reg->host_user_addr;
 342                 }
 343         }
 344
 345         return 0;
 346 }
 347
 348
 349 /*
 350  * Converts ring address to Vhost virtual address.
 351  * If IOMMU is enabled, the ring address is a guest IO virtual address,
 352  * else it is a QEMU virtual address.
 353  */
 354 static uint64_t
 355 ring_addr_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
 356                 uint64_t ra, uint64_t size)
 357 {
 358         if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)) {
 359                 uint64_t vva;
 360
 361                 vva = vhost_user_iotlb_cache_find(vq, ra,
 362                                         &size, VHOST_ACCESS_RW);
 363                 if (!vva)
 364                         vhost_user_iotlb_miss(dev, ra, VHOST_ACCESS_RW);
 365
 366                 return vva;
 367         }
 368
 369         return qva_to_vva(dev, ra);
 370 }
 371
 372 /*
 373  * The virtio device sends us the desc, used and avail ring addresses.
 374  * This function then converts these to our address space.
 375  */
 376 static int
 377 vhost_user_set_vring_addr(struct virtio_net *dev, VhostUserMsg *msg)
 378 {
 379         struct vhost_virtqueue *vq;
 380         struct vhost_vring_addr *addr = &msg->payload.addr;
 381
 382         if (dev->mem == NULL)
 383                 return -1;
 384
 385         /* addr->index refers to the queue index. The txq 1, rxq is 0. */
 386         vq = dev->virtqueue[msg->payload.addr.index];
 387
 388         /*
 389          * Rings addresses should not be interpreted as long as the ring is not
 390          * started and enabled
 391          */
 392         memcpy(&vq->ring_addrs, addr, sizeof(*addr));
 393
 394         vring_invalidate(dev, vq);
 395
 396         return 0;
 397 }
 398
 399 static struct virtio_net *
 400 translate_ring_addresses(struct virtio_net *dev, int vq_index)
 401 {
 402         struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
 403         struct vhost_vring_addr *addr = &vq->ring_addrs;
 404
 405         /* The addresses are converted from QEMU virtual to Vhost virtual. */
 406         if (vq->desc && vq->avail && vq->used)
 407                 return dev;
 408
 409         vq->desc = (struct vring_desc *)(uintptr_t)ring_addr_to_vva(dev,
 410                         vq, addr->desc_user_addr, sizeof(struct vring_desc));
 411         if (vq->desc == 0) {
 412                 RTE_LOG(DEBUG, VHOST_CONFIG,
 413                         "(%d) failed to find desc ring address.\n",
 414                         dev->vid);
 415                 return dev;
 416         }
 417
 418         dev = numa_realloc(dev, vq_index);
 419         vq = dev->virtqueue[vq_index];
 420
 421         vq->avail = (struct vring_avail *)(uintptr_t)ring_addr_to_vva(dev,
 422                         vq, addr->avail_user_addr, sizeof(struct vring_avail));
 423         if (vq->avail == 0) {
 424                 RTE_LOG(DEBUG, VHOST_CONFIG,
 425                         "(%d) failed to find avail ring address.\n",
 426                         dev->vid);
 427                 return dev;
 428         }
 429
 430         vq->used = (struct vring_used *)(uintptr_t)ring_addr_to_vva(dev,
 431                         vq, addr->used_user_addr, sizeof(struct vring_used));
 432         if (vq->used == 0) {
 433                 RTE_LOG(DEBUG, VHOST_CONFIG,
 434                         "(%d) failed to find used ring address.\n",
 435                         dev->vid);
 436                 return dev;
 437         }
 438
 439         if (vq->last_used_idx != vq->used->idx) {
 440                 RTE_LOG(WARNING, VHOST_CONFIG,
 441                         "last_used_idx (%u) and vq->used->idx (%u) mismatches; "
 442                         "some packets maybe resent for Tx and dropped for Rx\n",
 443                         vq->last_used_idx, vq->used->idx);
 444                 vq->last_used_idx  = vq->used->idx;
 445                 vq->last_avail_idx = vq->used->idx;
 446         }
 447
 448         vq->log_guest_addr = addr->log_guest_addr;
 449
 450         LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address desc: %p\n",
 451                         dev->vid, vq->desc);
 452         LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address avail: %p\n",
 453                         dev->vid, vq->avail);
 454         LOG_DEBUG(VHOST_CONFIG, "(%d) mapped address used: %p\n",
 455                         dev->vid, vq->used);
 456         LOG_DEBUG(VHOST_CONFIG, "(%d) log_guest_addr: %" PRIx64 "\n",
 457                         dev->vid, vq->log_guest_addr);
 458
 459         return dev;
 460 }
 461
 462 /*
 463  * The virtio device sends us the available ring last used index.
 464  */
 465 static int
 466 vhost_user_set_vring_base(struct virtio_net *dev,
 467                           VhostUserMsg *msg)
 468 {
 469         dev->virtqueue[msg->payload.state.index]->last_used_idx  =
 470                         msg->payload.state.num;
 471         dev->virtqueue[msg->payload.state.index]->last_avail_idx =
 472                         msg->payload.state.num;
 473
 474         return 0;
 475 }
 476
 477 static void
 478 add_one_guest_page(struct virtio_net *dev, uint64_t guest_phys_addr,
 479                    uint64_t host_phys_addr, uint64_t size)
 480 {
 481         struct guest_page *page, *last_page;
 482
 483         if (dev->nr_guest_pages == dev->max_guest_pages) {
 484                 dev->max_guest_pages *= 2;
 485                 dev->guest_pages = realloc(dev->guest_pages,
 486                                         dev->max_guest_pages * sizeof(*page));
 487         }
 488
 489         if (dev->nr_guest_pages > 0) {
 490                 last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
 491                 /* merge if the two pages are continuous */
 492                 if (host_phys_addr == last_page->host_phys_addr +
 493                                       last_page->size) {
 494                         last_page->size += size;
 495                         return;
 496                 }
 497         }
 498
 499         page = &dev->guest_pages[dev->nr_guest_pages++];
 500         page->guest_phys_addr = guest_phys_addr;
 501         page->host_phys_addr  = host_phys_addr;
 502         page->size = size;
 503 }
 504
 505 static void
 506 add_guest_pages(struct virtio_net *dev, struct rte_vhost_mem_region *reg,
 507                 uint64_t page_size)
 508 {
 509         uint64_t reg_size = reg->size;
 510         uint64_t host_user_addr  = reg->host_user_addr;
 511         uint64_t guest_phys_addr = reg->guest_phys_addr;
 512         uint64_t host_phys_addr;
 513         uint64_t size;
 514
 515         host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)host_user_addr);
 516         size = page_size - (guest_phys_addr & (page_size - 1));
 517         size = RTE_MIN(size, reg_size);
 518
 519         add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
 520         host_user_addr  += size;
 521         guest_phys_addr += size;
 522         reg_size -= size;
 523
 524         while (reg_size > 0) {
 525                 size = RTE_MIN(reg_size, page_size);
 526                 host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)
 527                                                   host_user_addr);
 528                 add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
 529
 530                 host_user_addr  += size;
 531                 guest_phys_addr += size;
 532                 reg_size -= size;
 533         }
 534 }
 535
 536 #ifdef RTE_LIBRTE_VHOST_DEBUG
 537 /* TODO: enable it only in debug mode? */
 538 static void
 539 dump_guest_pages(struct virtio_net *dev)
 540 {
 541         uint32_t i;
 542         struct guest_page *page;
 543
 544         for (i = 0; i < dev->nr_guest_pages; i++) {
 545                 page = &dev->guest_pages[i];
 546
 547                 RTE_LOG(INFO, VHOST_CONFIG,
 548                         "guest physical page region %u\n"
 549                         "\t guest_phys_addr: %" PRIx64 "\n"
 550                         "\t host_phys_addr : %" PRIx64 "\n"
 551                         "\t size           : %" PRIx64 "\n",
 552                         i,
 553                         page->guest_phys_addr,
 554                         page->host_phys_addr,
 555                         page->size);
 556         }
 557 }
 558 #else
 559 #define dump_guest_pages(dev)
 560 #endif
 561
 562 static int
 563 vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)
 564 {
 565         struct VhostUserMemory memory = pmsg->payload.memory;
 566         struct rte_vhost_mem_region *reg;
 567         void *mmap_addr;
 568         uint64_t mmap_size;
 569         uint64_t mmap_offset;
 570         uint64_t alignment;
 571         uint32_t i;
 572         int fd;
 573
 574         if (dev->mem) {
 575                 free_mem_region(dev);
 576                 rte_free(dev->mem);
 577                 dev->mem = NULL;
 578         }
 579
 580         dev->nr_guest_pages = 0;
 581         if (!dev->guest_pages) {
 582                 dev->max_guest_pages = 8;
 583                 dev->guest_pages = malloc(dev->max_guest_pages *
 584                                                 sizeof(struct guest_page));
 585                 if (dev->guest_pages == NULL) {
 586                         RTE_LOG(ERR, VHOST_CONFIG,
 587                                 "(%d) failed to allocate memory "
 588                                 "for dev->guest_pages\n",
 589                                 dev->vid);
 590                         return -1;
 591                 }
 592         }
 593
 594         dev->mem = rte_zmalloc("vhost-mem-table", sizeof(struct rte_vhost_memory) +
 595                 sizeof(struct rte_vhost_mem_region) * memory.nregions, 0);
 596         if (dev->mem == NULL) {
 597                 RTE_LOG(ERR, VHOST_CONFIG,
 598                         "(%d) failed to allocate memory for dev->mem\n",
 599                         dev->vid);
 600                 return -1;
 601         }
 602         dev->mem->nregions = memory.nregions;
 603
 604         for (i = 0; i < memory.nregions; i++) {
 605                 fd  = pmsg->fds[i];
 606                 reg = &dev->mem->regions[i];
 607
 608                 reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
 609                 reg->guest_user_addr = memory.regions[i].userspace_addr;
 610                 reg->size            = memory.regions[i].memory_size;
 611                 reg->fd              = fd;
 612
 613                 mmap_offset = memory.regions[i].mmap_offset;
 614                 mmap_size   = reg->size + mmap_offset;
 615
 616                 /* mmap() without flag of MAP_ANONYMOUS, should be called
 617                  * with length argument aligned with hugepagesz at older
 618                  * longterm version Linux, like 2.6.32 and 3.2.72, or
 619                  * mmap() will fail with EINVAL.
 620                  *
 621                  * to avoid failure, make sure in caller to keep length
 622                  * aligned.
 623                  */
 624                 alignment = get_blk_size(fd);
 625                 if (alignment == (uint64_t)-1) {
 626                         RTE_LOG(ERR, VHOST_CONFIG,
 627                                 "couldn't get hugepage size through fstat\n");
 628                         goto err_mmap;
 629                 }
 630                 mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);
 631
 632                 mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
 633                                  MAP_SHARED | MAP_POPULATE, fd, 0);
 634
 635                 if (mmap_addr == MAP_FAILED) {
 636                         RTE_LOG(ERR, VHOST_CONFIG,
 637                                 "mmap region %u failed.\n", i);
 638                         goto err_mmap;
 639                 }
 640
 641                 reg->mmap_addr = mmap_addr;
 642                 reg->mmap_size = mmap_size;
 643                 reg->host_user_addr = (uint64_t)(uintptr_t)mmap_addr +
 644                                       mmap_offset;
 645
 646                 if (dev->dequeue_zero_copy)
 647                         add_guest_pages(dev, reg, alignment);
 648
 649                 RTE_LOG(INFO, VHOST_CONFIG,
 650                         "guest memory region %u, size: 0x%" PRIx64 "\n"
 651                         "\t guest physical addr: 0x%" PRIx64 "\n"
 652                         "\t guest virtual  addr: 0x%" PRIx64 "\n"
 653                         "\t host  virtual  addr: 0x%" PRIx64 "\n"
 654                         "\t mmap addr : 0x%" PRIx64 "\n"
 655                         "\t mmap size : 0x%" PRIx64 "\n"
 656                         "\t mmap align: 0x%" PRIx64 "\n"
 657                         "\t mmap off  : 0x%" PRIx64 "\n",
 658                         i, reg->size,
 659                         reg->guest_phys_addr,
 660                         reg->guest_user_addr,
 661                         reg->host_user_addr,
 662                         (uint64_t)(uintptr_t)mmap_addr,
 663                         mmap_size,
 664                         alignment,
 665                         mmap_offset);
 666         }
 667
 668         dump_guest_pages(dev);
 669
 670         return 0;
 671
 672 err_mmap:
 673         free_mem_region(dev);
 674         rte_free(dev->mem);
 675         dev->mem = NULL;
 676         return -1;
 677 }
 678
 679 static int
 680 vq_is_ready(struct vhost_virtqueue *vq)
 681 {
 682         return vq && vq->desc && vq->avail && vq->used &&
 683                vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
 684                vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
 685 }
 686
 687 static int
 688 virtio_is_ready(struct virtio_net *dev)
 689 {
 690         struct vhost_virtqueue *vq;
 691         uint32_t i;
 692
 693         if (dev->nr_vring == 0)
 694                 return 0;
 695
 696         for (i = 0; i < dev->nr_vring; i++) {
 697                 vq = dev->virtqueue[i];
 698
 699                 if (!vq_is_ready(vq))
 700                         return 0;
 701         }
 702
 703         RTE_LOG(INFO, VHOST_CONFIG,
 704                 "virtio is now ready for processing.\n");
 705         return 1;
 706 }
 707
 708 static void
 709 vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
 710 {
 711         struct vhost_vring_file file;
 712         struct vhost_virtqueue *vq;
 713
 714         file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
 715         if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
 716                 file.fd = VIRTIO_INVALID_EVENTFD;
 717         else
 718                 file.fd = pmsg->fds[0];
 719         RTE_LOG(INFO, VHOST_CONFIG,
 720                 "vring call idx:%d file:%d\n", file.index, file.fd);
 721
 722         vq = dev->virtqueue[file.index];
 723         if (vq->callfd >= 0)
 724                 close(vq->callfd);
 725
 726         vq->callfd = file.fd;
 727 }
 728
 729 static void
 730 vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
 731 {
 732         struct vhost_vring_file file;
 733         struct vhost_virtqueue *vq;
 734         struct virtio_net *dev = *pdev;
 735
 736         file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
 737         if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
 738                 file.fd = VIRTIO_INVALID_EVENTFD;
 739         else
 740                 file.fd = pmsg->fds[0];
 741         RTE_LOG(INFO, VHOST_CONFIG,
 742                 "vring kick idx:%d file:%d\n", file.index, file.fd);
 743
 744         /*
 745          * Interpret ring addresses only when ring is started and enabled.
 746          * This is now if protocol features aren't supported.
 747          */
 748         if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
 749                 *pdev = dev = translate_ring_addresses(dev, file.index);
 750                 if (!dev)
 751                         return;
 752         }
 753
 754         vq = dev->virtqueue[file.index];
 755
 756         /*
 757          * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
 758          * the ring starts already enabled. Otherwise, it is enabled via
 759          * the SET_VRING_ENABLE message.
 760          */
 761         if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)))
 762                 vq->enabled = 1;
 763
 764         if (vq->kickfd >= 0)
 765                 close(vq->kickfd);
 766         vq->kickfd = file.fd;
 767 }
 768
 769 static void
 770 free_zmbufs(struct vhost_virtqueue *vq)
 771 {
 772         struct zcopy_mbuf *zmbuf, *next;
 773
 774         for (zmbuf = TAILQ_FIRST(&vq->zmbuf_list);
 775              zmbuf != NULL; zmbuf = next) {
 776                 next = TAILQ_NEXT(zmbuf, next);
 777
 778                 rte_pktmbuf_free(zmbuf->mbuf);
 779                 TAILQ_REMOVE(&vq->zmbuf_list, zmbuf, next);
 780         }
 781
 782         rte_free(vq->zmbufs);
 783 }
 784
 785 /*
 786  * when virtio is stopped, qemu will send us the GET_VRING_BASE message.
 787  */
 788 static int
 789 vhost_user_get_vring_base(struct virtio_net *dev,
 790                           VhostUserMsg *msg)
 791 {
 792         struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
 793
 794         /* We have to stop the queue (virtio) if it is running. */
 795         if (dev->flags & VIRTIO_DEV_RUNNING) {
 796                 dev->flags &= ~VIRTIO_DEV_RUNNING;
 797                 dev->notify_ops->destroy_device(dev->vid);
 798         }
 799
 800         dev->flags &= ~VIRTIO_DEV_READY;
 801
 802         /* Here we are safe to get the last used index */
 803         msg->payload.state.num = vq->last_used_idx;
 804
 805         RTE_LOG(INFO, VHOST_CONFIG,
 806                 "vring base idx:%d file:%d\n", msg->payload.state.index,
 807                 msg->payload.state.num);
 808         /*
 809          * Based on current qemu vhost-user implementation, this message is
 810          * sent and only sent in vhost_vring_stop.
 811          * TODO: cleanup the vring, it isn't usable since here.
 812          */
 813         if (vq->kickfd >= 0)
 814                 close(vq->kickfd);
 815
 816         vq->kickfd = VIRTIO_UNINITIALIZED_EVENTFD;
 817
 818         if (dev->dequeue_zero_copy)
 819                 free_zmbufs(vq);
 820         rte_free(vq->shadow_used_ring);
 821         vq->shadow_used_ring = NULL;
 822
 823         rte_free(vq->batch_copy_elems);
 824         vq->batch_copy_elems = NULL;
 825
 826         return 0;
 827 }
 828
 829 /*
 830  * when virtio queues are ready to work, qemu will send us to
 831  * enable the virtio queue pair.
 832  */
 833 static int
 834 vhost_user_set_vring_enable(struct virtio_net **pdev,
 835                             VhostUserMsg *msg)
 836 {
 837         struct virtio_net *dev = *pdev;
 838         int enable = (int)msg->payload.state.num;
 839
 840         RTE_LOG(INFO, VHOST_CONFIG,
 841                 "set queue enable: %d to qp idx: %d\n",
 842                 enable, msg->payload.state.index);
 843
 844         /*
 845          * Interpret ring addresses only when ring is started and enabled.
 846          * This is now if protocol features are supported.
 847          */
 848         if (enable && (dev->features &
 849                                 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
 850                 dev = translate_ring_addresses(dev, msg->payload.state.index);
 851                 if (!dev)
 852                         return -1;
 853
 854                 *pdev = dev;
 855         }
 856
 857         if (dev->notify_ops->vring_state_changed)
 858                 dev->notify_ops->vring_state_changed(dev->vid,
 859                                 msg->payload.state.index, enable);
 860
 861         dev->virtqueue[msg->payload.state.index]->enabled = enable;
 862
 863         return 0;
 864 }
 865
 866 static void
 867 vhost_user_set_protocol_features(struct virtio_net *dev,
 868                                  uint64_t protocol_features)
 869 {
 870         if (protocol_features & ~VHOST_USER_PROTOCOL_FEATURES)
 871                 return;
 872
 873         dev->protocol_features = protocol_features;
 874 }
 875
 876 static int
 877 vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
 878 {
 879         int fd = msg->fds[0];
 880         uint64_t size, off;
 881         void *addr;
 882
 883         if (fd < 0) {
 884                 RTE_LOG(ERR, VHOST_CONFIG, "invalid log fd: %d\n", fd);
 885                 return -1;
 886         }
 887
 888         if (msg->size != sizeof(VhostUserLog)) {
 889                 RTE_LOG(ERR, VHOST_CONFIG,
 890                         "invalid log base msg size: %"PRId32" != %d\n",
 891                         msg->size, (int)sizeof(VhostUserLog));
 892                 return -1;
 893         }
 894
 895         size = msg->payload.log.mmap_size;
 896         off  = msg->payload.log.mmap_offset;
 897         RTE_LOG(INFO, VHOST_CONFIG,
 898                 "log mmap size: %"PRId64", offset: %"PRId64"\n",
 899                 size, off);
 900
 901         /*
 902          * mmap from 0 to workaround a hugepage mmap bug: mmap will
 903          * fail when offset is not page size aligned.
 904          */
 905         addr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
 906         close(fd);
 907         if (addr == MAP_FAILED) {
 908                 RTE_LOG(ERR, VHOST_CONFIG, "mmap log base failed!\n");
 909                 return -1;
 910         }
 911
 912         /*
 913          * Free previously mapped log memory on occasionally
 914          * multiple VHOST_USER_SET_LOG_BASE.
 915          */
 916         if (dev->log_addr) {
 917                 munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
 918         }
 919         dev->log_addr = (uint64_t)(uintptr_t)addr;
 920         dev->log_base = dev->log_addr + off;
 921         dev->log_size = size;
 922
 923         return 0;
 924 }
 925
 926 /*
 927  * An rarp packet is constructed and broadcasted to notify switches about
 928  * the new location of the migrated VM, so that packets from outside will
 929  * not be lost after migration.
 930  *
 931  * However, we don't actually "send" a rarp packet here, instead, we set
 932  * a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
 933  */
 934 static int
 935 vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
 936 {
 937         uint8_t *mac = (uint8_t *)&msg->payload.u64;
 938
 939         RTE_LOG(DEBUG, VHOST_CONFIG,
 940                 ":: mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
 941                 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 942         memcpy(dev->mac.addr_bytes, mac, 6);
 943
 944         /*
 945          * Set the flag to inject a RARP broadcast packet at
 946          * rte_vhost_dequeue_burst().
 947          *
 948          * rte_smp_wmb() is for making sure the mac is copied
 949          * before the flag is set.
 950          */
 951         rte_smp_wmb();
 952         rte_atomic16_set(&dev->broadcast_rarp, 1);
 953
 954         return 0;
 955 }
 956
 957 static int
 958 vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
 959 {
 960         if (msg->payload.u64 < VIRTIO_MIN_MTU ||
 961                         msg->payload.u64 > VIRTIO_MAX_MTU) {
 962                 RTE_LOG(ERR, VHOST_CONFIG, "Invalid MTU size (%"PRIu64")\n",
 963                                 msg->payload.u64);
 964
 965                 return -1;
 966         }
 967
 968         dev->mtu = msg->payload.u64;
 969
 970         return 0;
 971 }
 972
 973 static int
 974 vhost_user_set_req_fd(struct virtio_net *dev, struct VhostUserMsg *msg)
 975 {
 976         int fd = msg->fds[0];
 977
 978         if (fd < 0) {
 979                 RTE_LOG(ERR, VHOST_CONFIG,
 980                                 "Invalid file descriptor for slave channel (%d)\n",
 981                                 fd);
 982                 return -1;
 983         }
 984
 985         dev->slave_req_fd = fd;
 986
 987         return 0;
 988 }
 989
 990 static int
 991 is_vring_iotlb_update(struct vhost_virtqueue *vq, struct vhost_iotlb_msg *imsg)
 992 {
 993         struct vhost_vring_addr *ra;
 994         uint64_t start, end;
 995
 996         start = imsg->iova;
 997         end = start + imsg->size;
 998
 999         ra = &vq->ring_addrs;
1000         if (ra->desc_user_addr >= start && ra->desc_user_addr < end)
1001                 return 1;
1002         if (ra->avail_user_addr >= start && ra->avail_user_addr < end)
1003                 return 1;
1004         if (ra->used_user_addr >= start && ra->used_user_addr < end)
1005                 return 1;
1006
1007         return 0;
1008 }
1009
1010 static int
1011 is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
1012                                 struct vhost_iotlb_msg *imsg)
1013 {
1014         uint64_t istart, iend, vstart, vend;
1015
1016         istart = imsg->iova;
1017         iend = istart + imsg->size - 1;
1018
1019         vstart = (uintptr_t)vq->desc;
1020         vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
1021         if (vstart <= iend && istart <= vend)
1022                 return 1;
1023
1024         vstart = (uintptr_t)vq->avail;
1025         vend = vstart + sizeof(struct vring_avail);
1026         vend += sizeof(uint16_t) * vq->size - 1;
1027         if (vstart <= iend && istart <= vend)
1028                 return 1;
1029
1030         vstart = (uintptr_t)vq->used;
1031         vend = vstart + sizeof(struct vring_used);
1032         vend += sizeof(struct vring_used_elem) * vq->size - 1;
1033         if (vstart <= iend && istart <= vend)
1034                 return 1;
1035
1036         return 0;
1037 }
1038
1039 static int
1040 vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg)
1041 {
1042         struct virtio_net *dev = *pdev;
1043         struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
1044         uint16_t i;
1045         uint64_t vva;
1046
1047         switch (imsg->type) {
1048         case VHOST_IOTLB_UPDATE:
1049                 vva = qva_to_vva(dev, imsg->uaddr);
1050                 if (!vva)
1051                         return -1;
1052
1053                 for (i = 0; i < dev->nr_vring; i++) {
1054                         struct vhost_virtqueue *vq = dev->virtqueue[i];
1055
1056                         vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
1057                                         imsg->size, imsg->perm);
1058
1059                         if (is_vring_iotlb_update(vq, imsg))
1060                                 *pdev = dev = translate_ring_addresses(dev, i);
1061                 }
1062                 break;
1063         case VHOST_IOTLB_INVALIDATE:
1064                 for (i = 0; i < dev->nr_vring; i++) {
1065                         struct vhost_virtqueue *vq = dev->virtqueue[i];
1066
1067                         vhost_user_iotlb_cache_remove(vq, imsg->iova,
1068                                         imsg->size);
1069
1070                         if (is_vring_iotlb_invalidate(vq, imsg))
1071                                 vring_invalidate(dev, vq);
1072                 }
1073                 break;
1074         default:
1075                 RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
1076                                 imsg->type);
1077                 return -1;
1078         }
1079
1080         return 0;
1081 }
1082
1083 /* return bytes# of read on success or negative val on failure. */
1084 static int
1085 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
1086 {
1087         int ret;
1088
1089         ret = read_fd_message(sockfd, (char *)msg, VHOST_USER_HDR_SIZE,
1090                 msg->fds, VHOST_MEMORY_MAX_NREGIONS);
1091         if (ret <= 0)
1092                 return ret;
1093
1094         if (msg && msg->size) {
1095                 if (msg->size > sizeof(msg->payload)) {
1096                         RTE_LOG(ERR, VHOST_CONFIG,
1097                                 "invalid msg size: %d\n", msg->size);
1098                         return -1;
1099                 }
1100                 ret = read(sockfd, &msg->payload, msg->size);
1101                 if (ret <= 0)
1102                         return ret;
1103                 if (ret != (int)msg->size) {
1104                         RTE_LOG(ERR, VHOST_CONFIG,
1105                                 "read control message failed\n");
1106                         return -1;
1107                 }
1108         }
1109
1110         return ret;
1111 }
1112
1113 static int
1114 send_vhost_message(int sockfd, struct VhostUserMsg *msg)
1115 {
1116         if (!msg)
1117                 return 0;
1118
1119         return send_fd_message(sockfd, (char *)msg,
1120                 VHOST_USER_HDR_SIZE + msg->size, NULL, 0);
1121 }
1122
1123 static int
1124 send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
1125 {
1126         if (!msg)
1127                 return 0;
1128
1129         msg->flags &= ~VHOST_USER_VERSION_MASK;
1130         msg->flags &= ~VHOST_USER_NEED_REPLY;
1131         msg->flags |= VHOST_USER_VERSION;
1132         msg->flags |= VHOST_USER_REPLY_MASK;
1133
1134         return send_vhost_message(sockfd, msg);
1135 }
1136
1137 /*
1138  * Allocate a queue pair if it hasn't been allocated yet
1139  */
1140 static int
1141 vhost_user_check_and_alloc_queue_pair(struct virtio_net *dev, VhostUserMsg *msg)
1142 {
1143         uint16_t vring_idx;
1144
1145         switch (msg->request.master) {
1146         case VHOST_USER_SET_VRING_KICK:
1147         case VHOST_USER_SET_VRING_CALL:
1148         case VHOST_USER_SET_VRING_ERR:
1149                 vring_idx = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
1150                 break;
1151         case VHOST_USER_SET_VRING_NUM:
1152         case VHOST_USER_SET_VRING_BASE:
1153         case VHOST_USER_SET_VRING_ENABLE:
1154                 vring_idx = msg->payload.state.index;
1155                 break;
1156         case VHOST_USER_SET_VRING_ADDR:
1157                 vring_idx = msg->payload.addr.index;
1158                 break;
1159         default:
1160                 return 0;
1161         }
1162
1163         if (vring_idx >= VHOST_MAX_VRING) {
1164                 RTE_LOG(ERR, VHOST_CONFIG,
1165                         "invalid vring index: %u\n", vring_idx);
1166                 return -1;
1167         }
1168
1169         if (dev->virtqueue[vring_idx])
1170                 return 0;
1171
1172         return alloc_vring_queue(dev, vring_idx);
1173 }
1174
1175 int
1176 vhost_user_msg_handler(int vid, int fd)
1177 {
1178         struct virtio_net *dev;
1179         struct VhostUserMsg msg;
1180         int ret;
1181
1182         dev = get_device(vid);
1183         if (dev == NULL)
1184                 return -1;
1185
1186         if (!dev->notify_ops) {
1187                 dev->notify_ops = vhost_driver_callback_get(dev->ifname);
1188                 if (!dev->notify_ops) {
1189                         RTE_LOG(ERR, VHOST_CONFIG,
1190                                 "failed to get callback ops for driver %s\n",
1191                                 dev->ifname);
1192                         return -1;
1193                 }
1194         }
1195
1196         ret = read_vhost_message(fd, &msg);
1197         if (ret <= 0 || msg.request.master >= VHOST_USER_MAX) {
1198                 if (ret < 0)
1199                         RTE_LOG(ERR, VHOST_CONFIG,
1200                                 "vhost read message failed\n");
1201                 else if (ret == 0)
1202                         RTE_LOG(INFO, VHOST_CONFIG,
1203                                 "vhost peer closed\n");
1204                 else
1205                         RTE_LOG(ERR, VHOST_CONFIG,
1206                                 "vhost read incorrect message\n");
1207
1208                 return -1;
1209         }
1210
1211         ret = 0;
1212         if (msg.request.master != VHOST_USER_IOTLB_MSG)
1213                 RTE_LOG(INFO, VHOST_CONFIG, "read message %s\n",
1214                         vhost_message_str[msg.request.master]);
1215         else
1216                 RTE_LOG(DEBUG, VHOST_CONFIG, "read message %s\n",
1217                         vhost_message_str[msg.request.master]);
1218
1219         ret = vhost_user_check_and_alloc_queue_pair(dev, &msg);
1220         if (ret < 0) {
1221                 RTE_LOG(ERR, VHOST_CONFIG,
1222                         "failed to alloc queue\n");
1223                 return -1;
1224         }
1225
1226         switch (msg.request.master) {
1227         case VHOST_USER_GET_FEATURES:
1228                 msg.payload.u64 = vhost_user_get_features(dev);
1229                 msg.size = sizeof(msg.payload.u64);
1230                 send_vhost_reply(fd, &msg);
1231                 break;
1232         case VHOST_USER_SET_FEATURES:
1233                 vhost_user_set_features(dev, msg.payload.u64);
1234                 break;
1235
1236         case VHOST_USER_GET_PROTOCOL_FEATURES:
1237                 msg.payload.u64 = VHOST_USER_PROTOCOL_FEATURES;
1238                 msg.size = sizeof(msg.payload.u64);
1239                 send_vhost_reply(fd, &msg);
1240                 break;
1241         case VHOST_USER_SET_PROTOCOL_FEATURES:
1242                 vhost_user_set_protocol_features(dev, msg.payload.u64);
1243                 break;
1244
1245         case VHOST_USER_SET_OWNER:
1246                 vhost_user_set_owner();
1247                 break;
1248         case VHOST_USER_RESET_OWNER:
1249                 vhost_user_reset_owner(dev);
1250                 break;
1251
1252         case VHOST_USER_SET_MEM_TABLE:
1253                 ret = vhost_user_set_mem_table(dev, &msg);
1254                 break;
1255
1256         case VHOST_USER_SET_LOG_BASE:
1257                 vhost_user_set_log_base(dev, &msg);
1258
1259                 /* it needs a reply */
1260                 msg.size = sizeof(msg.payload.u64);
1261                 send_vhost_reply(fd, &msg);
1262                 break;
1263         case VHOST_USER_SET_LOG_FD:
1264                 close(msg.fds[0]);
1265                 RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
1266                 break;
1267
1268         case VHOST_USER_SET_VRING_NUM:
1269                 vhost_user_set_vring_num(dev, &msg);
1270                 break;
1271         case VHOST_USER_SET_VRING_ADDR:
1272                 vhost_user_set_vring_addr(dev, &msg);
1273                 break;
1274         case VHOST_USER_SET_VRING_BASE:
1275                 vhost_user_set_vring_base(dev, &msg);
1276                 break;
1277
1278         case VHOST_USER_GET_VRING_BASE:
1279                 vhost_user_get_vring_base(dev, &msg);
1280                 msg.size = sizeof(msg.payload.state);
1281                 send_vhost_reply(fd, &msg);
1282                 break;
1283
1284         case VHOST_USER_SET_VRING_KICK:
1285                 vhost_user_set_vring_kick(&dev, &msg);
1286                 break;
1287         case VHOST_USER_SET_VRING_CALL:
1288                 vhost_user_set_vring_call(dev, &msg);
1289                 break;
1290
1291         case VHOST_USER_SET_VRING_ERR:
1292                 if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
1293                         close(msg.fds[0]);
1294                 RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
1295                 break;
1296
1297         case VHOST_USER_GET_QUEUE_NUM:
1298                 msg.payload.u64 = VHOST_MAX_QUEUE_PAIRS;
1299                 msg.size = sizeof(msg.payload.u64);
1300                 send_vhost_reply(fd, &msg);
1301                 break;
1302
1303         case VHOST_USER_SET_VRING_ENABLE:
1304                 vhost_user_set_vring_enable(&dev, &msg);
1305                 break;
1306         case VHOST_USER_SEND_RARP:
1307                 vhost_user_send_rarp(dev, &msg);
1308                 break;
1309
1310         case VHOST_USER_NET_SET_MTU:
1311                 ret = vhost_user_net_set_mtu(dev, &msg);
1312                 break;
1313
1314         case VHOST_USER_SET_SLAVE_REQ_FD:
1315                 ret = vhost_user_set_req_fd(dev, &msg);
1316                 break;
1317
1318         case VHOST_USER_IOTLB_MSG:
1319                 ret = vhost_user_iotlb_msg(&dev, &msg);
1320                 break;
1321
1322         default:
1323                 ret = -1;
1324                 break;
1325
1326         }
1327
1328         if (msg.flags & VHOST_USER_NEED_REPLY) {
1329                 msg.payload.u64 = !!ret;
1330                 msg.size = sizeof(msg.payload.u64);
1331                 send_vhost_reply(fd, &msg);
1332         }
1333
1334         if (!(dev->flags & VIRTIO_DEV_RUNNING) && virtio_is_ready(dev)) {
1335                 dev->flags |= VIRTIO_DEV_READY;
1336
1337                 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
1338                         if (dev->dequeue_zero_copy) {
1339                                 RTE_LOG(INFO, VHOST_CONFIG,
1340                                                 "dequeue zero copy is enabled\n");
1341                         }
1342
1343                         if (dev->notify_ops->new_device(dev->vid) == 0)
1344                                 dev->flags |= VIRTIO_DEV_RUNNING;
1345                 }
1346         }
1347
1348         return 0;
1349 }
1350
1351 int
1352 vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
1353 {
1354         int ret;
1355         struct VhostUserMsg msg = {
1356                 .request.slave = VHOST_USER_SLAVE_IOTLB_MSG,
1357                 .flags = VHOST_USER_VERSION,
1358                 .size = sizeof(msg.payload.iotlb),
1359                 .payload.iotlb = {
1360                         .iova = iova,
1361                         .perm = perm,
1362                         .type = VHOST_IOTLB_MISS,
1363                 },
1364         };
1365
1366         ret = send_vhost_message(dev->slave_req_fd, &msg);
1367         if (ret < 0) {
1368                 RTE_LOG(ERR, VHOST_CONFIG,
1369                                 "Failed to send IOTLB miss message (%d)\n",
1370                                 ret);
1371                 return ret;
1372         }
1373
1374         return 0;
1375 }