tests/vhost-user-test.c

   1 /*
   2  * QTest testcase for the vhost-user
   3  *
   4  * Copyright (c) 2014 Virtual Open Systems Sarl.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  *
   9  */
  10
  11 #include "qemu/osdep.h"
  12
  13 #include "libqtest.h"
  14 #include "qemu/option.h"
  15 #include "qemu/range.h"
  16 #include "qemu/sockets.h"
  17 #include "sysemu/char.h"
  18 #include "sysemu/sysemu.h"
  19 #include "libqos/libqos.h"
  20 #include "libqos/pci-pc.h"
  21 #include "libqos/virtio-pci.h"
  22
  23 #include "libqos/pci-pc.h"
  24 #include "libqos/virtio-pci.h"
  25 #include "libqos/malloc-pc.h"
  26 #include "hw/virtio/virtio-net.h"
  27
  28 #include <linux/vhost.h>
  29 #include <linux/virtio_ids.h>
  30 #include <linux/virtio_net.h>
  31 #include <sys/vfs.h>
  32
  33 /* GLIB version compatibility flags */
  34 #if !GLIB_CHECK_VERSION(2, 26, 0)
  35 #define G_TIME_SPAN_SECOND              (G_GINT64_CONSTANT(1000000))
  36 #endif
  37
  38 #if GLIB_CHECK_VERSION(2, 28, 0)
  39 #define HAVE_MONOTONIC_TIME
  40 #endif
  41
  42 #define QEMU_CMD_MEM    " -m %d -object memory-backend-file,id=mem,size=%dM,"\
  43                         "mem-path=%s,share=on -numa node,memdev=mem"
  44 #define QEMU_CMD_CHR    " -chardev socket,id=%s,path=%s%s"
  45 #define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=%s,vhostforce"
  46 #define QEMU_CMD_NET    " -device virtio-net-pci,netdev=net0"
  47
  48 #define QEMU_CMD        QEMU_CMD_MEM QEMU_CMD_CHR \
  49                         QEMU_CMD_NETDEV QEMU_CMD_NET
  50
  51 #define HUGETLBFS_MAGIC       0x958458f6
  52
  53 /*********** FROM hw/virtio/vhost-user.c *************************************/
  54
  55 #define VHOST_MEMORY_MAX_NREGIONS    8
  56
  57 #define VHOST_USER_F_PROTOCOL_FEATURES 30
  58 #define VHOST_USER_PROTOCOL_F_MQ 0
  59 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  60
  61 #define VHOST_LOG_PAGE 0x1000
  62
  63 typedef enum VhostUserRequest {
  64     VHOST_USER_NONE = 0,
  65     VHOST_USER_GET_FEATURES = 1,
  66     VHOST_USER_SET_FEATURES = 2,
  67     VHOST_USER_SET_OWNER = 3,
  68     VHOST_USER_RESET_OWNER = 4,
  69     VHOST_USER_SET_MEM_TABLE = 5,
  70     VHOST_USER_SET_LOG_BASE = 6,
  71     VHOST_USER_SET_LOG_FD = 7,
  72     VHOST_USER_SET_VRING_NUM = 8,
  73     VHOST_USER_SET_VRING_ADDR = 9,
  74     VHOST_USER_SET_VRING_BASE = 10,
  75     VHOST_USER_GET_VRING_BASE = 11,
  76     VHOST_USER_SET_VRING_KICK = 12,
  77     VHOST_USER_SET_VRING_CALL = 13,
  78     VHOST_USER_SET_VRING_ERR = 14,
  79     VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  80     VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  81     VHOST_USER_GET_QUEUE_NUM = 17,
  82     VHOST_USER_SET_VRING_ENABLE = 18,
  83     VHOST_USER_MAX
  84 } VhostUserRequest;
  85
  86 typedef struct VhostUserMemoryRegion {
  87     uint64_t guest_phys_addr;
  88     uint64_t memory_size;
  89     uint64_t userspace_addr;
  90     uint64_t mmap_offset;
  91 } VhostUserMemoryRegion;
  92
  93 typedef struct VhostUserMemory {
  94     uint32_t nregions;
  95     uint32_t padding;
  96     VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  97 } VhostUserMemory;
  98
  99 typedef struct VhostUserLog {
 100     uint64_t mmap_size;
 101     uint64_t mmap_offset;
 102 } VhostUserLog;
 103
 104 typedef struct VhostUserMsg {
 105     VhostUserRequest request;
 106
 107 #define VHOST_USER_VERSION_MASK     (0x3)
 108 #define VHOST_USER_REPLY_MASK       (0x1<<2)
 109     uint32_t flags;
 110     uint32_t size; /* the following payload size */
 111     union {
 112 #define VHOST_USER_VRING_IDX_MASK   (0xff)
 113 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 114         uint64_t u64;
 115         struct vhost_vring_state state;
 116         struct vhost_vring_addr addr;
 117         VhostUserMemory memory;
 118         VhostUserLog log;
 119     } payload;
 120 } QEMU_PACKED VhostUserMsg;
 121
 122 static VhostUserMsg m __attribute__ ((unused));
 123 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
 124                             + sizeof(m.flags) \
 125                             + sizeof(m.size))
 126
 127 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
 128
 129 /* The version of the protocol we support */
 130 #define VHOST_USER_VERSION    (0x1)
 131 /*****************************************************************************/
 132
 133 enum {
 134     TEST_FLAGS_OK,
 135     TEST_FLAGS_DISCONNECT,
 136     TEST_FLAGS_BAD,
 137     TEST_FLAGS_END,
 138 };
 139
 140 typedef struct TestServer {
 141     gchar *socket_path;
 142     gchar *mig_path;
 143     gchar *chr_name;
 144     CharDriverState *chr;
 145     int fds_num;
 146     int fds[VHOST_MEMORY_MAX_NREGIONS];
 147     VhostUserMemory memory;
 148     CompatGMutex data_mutex;
 149     CompatGCond data_cond;
 150     int log_fd;
 151     uint64_t rings;
 152     bool test_fail;
 153     int test_flags;
 154     int queues;
 155 } TestServer;
 156
 157 static const char *tmpfs;
 158 static const char *root;
 159
 160 static void init_virtio_dev(TestServer *s)
 161 {
 162     QPCIBus *bus;
 163     QVirtioPCIDevice *dev;
 164     uint32_t features;
 165
 166     bus = qpci_init_pc(NULL);
 167     g_assert_nonnull(bus);
 168
 169     dev = qvirtio_pci_device_find(bus, VIRTIO_ID_NET);
 170     g_assert_nonnull(dev);
 171
 172     qvirtio_pci_device_enable(dev);
 173     qvirtio_reset(&qvirtio_pci, &dev->vdev);
 174     qvirtio_set_acknowledge(&qvirtio_pci, &dev->vdev);
 175     qvirtio_set_driver(&qvirtio_pci, &dev->vdev);
 176
 177     features = qvirtio_get_features(&qvirtio_pci, &dev->vdev);
 178     features = features & VIRTIO_NET_F_MAC;
 179     qvirtio_set_features(&qvirtio_pci, &dev->vdev, features);
 180
 181     qvirtio_set_driver_ok(&qvirtio_pci, &dev->vdev);
 182 }
 183
 184 static void wait_for_fds(TestServer *s)
 185 {
 186     gint64 end_time;
 187
 188     g_mutex_lock(&s->data_mutex);
 189
 190     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 191     while (!s->fds_num) {
 192         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 193             /* timeout has passed */
 194             g_assert(s->fds_num);
 195             break;
 196         }
 197     }
 198
 199     /* check for sanity */
 200     g_assert_cmpint(s->fds_num, >, 0);
 201     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 202
 203     g_mutex_unlock(&s->data_mutex);
 204 }
 205
 206 static void read_guest_mem(const void *data)
 207 {
 208     TestServer *s = (void *)data;
 209     uint32_t *guest_mem;
 210     int i, j;
 211     size_t size;
 212
 213     wait_for_fds(s);
 214
 215     g_mutex_lock(&s->data_mutex);
 216
 217     /* iterate all regions */
 218     for (i = 0; i < s->fds_num; i++) {
 219
 220         /* We'll check only the region statring at 0x0*/
 221         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 222             continue;
 223         }
 224
 225         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 226
 227         size = s->memory.regions[i].memory_size +
 228             s->memory.regions[i].mmap_offset;
 229
 230         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 231                          MAP_SHARED, s->fds[i], 0);
 232
 233         g_assert(guest_mem != MAP_FAILED);
 234         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 235
 236         for (j = 0; j < 256; j++) {
 237             uint32_t a = readl(s->memory.regions[i].guest_phys_addr + j*4);
 238             uint32_t b = guest_mem[j];
 239
 240             g_assert_cmpint(a, ==, b);
 241         }
 242
 243         munmap(guest_mem, s->memory.regions[i].memory_size);
 244     }
 245
 246     g_mutex_unlock(&s->data_mutex);
 247 }
 248
 249 static void *thread_function(void *data)
 250 {
 251     GMainLoop *loop = data;
 252     g_main_loop_run(loop);
 253     return NULL;
 254 }
 255
 256 static int chr_can_read(void *opaque)
 257 {
 258     return VHOST_USER_HDR_SIZE;
 259 }
 260
 261 static void chr_read(void *opaque, const uint8_t *buf, int size)
 262 {
 263     TestServer *s = opaque;
 264     CharDriverState *chr = s->chr;
 265     VhostUserMsg msg;
 266     uint8_t *p = (uint8_t *) &msg;
 267     int fd;
 268
 269     if (s->test_fail) {
 270         qemu_chr_disconnect(chr);
 271         /* now switch to non-failure */
 272         s->test_fail = false;
 273     }
 274
 275     if (size != VHOST_USER_HDR_SIZE) {
 276         g_test_message("Wrong message size received %d\n", size);
 277         return;
 278     }
 279
 280     g_mutex_lock(&s->data_mutex);
 281     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 282
 283     if (msg.size) {
 284         p += VHOST_USER_HDR_SIZE;
 285         size = qemu_chr_fe_read_all(chr, p, msg.size);
 286         if (size != msg.size) {
 287             g_test_message("Wrong message size received %d != %d\n",
 288                            size, msg.size);
 289             return;
 290         }
 291     }
 292
 293     switch (msg.request) {
 294     case VHOST_USER_GET_FEATURES:
 295         /* send back features to qemu */
 296         msg.flags |= VHOST_USER_REPLY_MASK;
 297         msg.size = sizeof(m.payload.u64);
 298         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 299             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 300         if (s->queues > 1) {
 301             msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
 302         }
 303         if (s->test_flags >= TEST_FLAGS_BAD) {
 304             msg.payload.u64 = 0;
 305             s->test_flags = TEST_FLAGS_END;
 306         }
 307         p = (uint8_t *) &msg;
 308         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 309         break;
 310
 311     case VHOST_USER_SET_FEATURES:
 312         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 313                         !=, 0ULL);
 314         if (s->test_flags == TEST_FLAGS_DISCONNECT) {
 315             qemu_chr_disconnect(chr);
 316             s->test_flags = TEST_FLAGS_BAD;
 317         }
 318         break;
 319
 320     case VHOST_USER_GET_PROTOCOL_FEATURES:
 321         /* send back features to qemu */
 322         msg.flags |= VHOST_USER_REPLY_MASK;
 323         msg.size = sizeof(m.payload.u64);
 324         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 325         if (s->queues > 1) {
 326             msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
 327         }
 328         p = (uint8_t *) &msg;
 329         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 330         break;
 331
 332     case VHOST_USER_GET_VRING_BASE:
 333         /* send back vring base to qemu */
 334         msg.flags |= VHOST_USER_REPLY_MASK;
 335         msg.size = sizeof(m.payload.state);
 336         msg.payload.state.num = 0;
 337         p = (uint8_t *) &msg;
 338         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 339
 340         assert(msg.payload.state.index < s->queues * 2);
 341         s->rings &= ~(0x1ULL << msg.payload.state.index);
 342         break;
 343
 344     case VHOST_USER_SET_MEM_TABLE:
 345         /* received the mem table */
 346         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 347         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds, G_N_ELEMENTS(s->fds));
 348
 349         /* signal the test that it can continue */
 350         g_cond_signal(&s->data_cond);
 351         break;
 352
 353     case VHOST_USER_SET_VRING_KICK:
 354     case VHOST_USER_SET_VRING_CALL:
 355         /* consume the fd */
 356         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 357         /*
 358          * This is a non-blocking eventfd.
 359          * The receive function forces it to be blocking,
 360          * so revert it back to non-blocking.
 361          */
 362         qemu_set_nonblock(fd);
 363         break;
 364
 365     case VHOST_USER_SET_LOG_BASE:
 366         if (s->log_fd != -1) {
 367             close(s->log_fd);
 368             s->log_fd = -1;
 369         }
 370         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 371         msg.flags |= VHOST_USER_REPLY_MASK;
 372         msg.size = 0;
 373         p = (uint8_t *) &msg;
 374         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 375
 376         g_cond_signal(&s->data_cond);
 377         break;
 378
 379     case VHOST_USER_SET_VRING_BASE:
 380         assert(msg.payload.state.index < s->queues * 2);
 381         s->rings |= 0x1ULL << msg.payload.state.index;
 382         break;
 383
 384     case VHOST_USER_GET_QUEUE_NUM:
 385         msg.flags |= VHOST_USER_REPLY_MASK;
 386         msg.size = sizeof(m.payload.u64);
 387         msg.payload.u64 = s->queues;
 388         p = (uint8_t *) &msg;
 389         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 390         break;
 391
 392     default:
 393         break;
 394     }
 395
 396     g_mutex_unlock(&s->data_mutex);
 397 }
 398
 399 static const char *init_hugepagefs(const char *path)
 400 {
 401     struct statfs fs;
 402     int ret;
 403
 404     if (access(path, R_OK | W_OK | X_OK)) {
 405         g_test_message("access on path (%s): %s\n", path, strerror(errno));
 406         return NULL;
 407     }
 408
 409     do {
 410         ret = statfs(path, &fs);
 411     } while (ret != 0 && errno == EINTR);
 412
 413     if (ret != 0) {
 414         g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
 415         return NULL;
 416     }
 417
 418     if (fs.f_type != HUGETLBFS_MAGIC) {
 419         g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
 420         return NULL;
 421     }
 422
 423     return path;
 424 }
 425
 426 static TestServer *test_server_new(const gchar *name)
 427 {
 428     TestServer *server = g_new0(TestServer, 1);
 429
 430     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 431     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 432     server->chr_name = g_strdup_printf("chr-%s", name);
 433
 434     g_mutex_init(&server->data_mutex);
 435     g_cond_init(&server->data_cond);
 436
 437     server->log_fd = -1;
 438     server->queues = 1;
 439
 440     return server;
 441 }
 442
 443 static void chr_event(void *opaque, int event)
 444 {
 445     TestServer *s = opaque;
 446
 447     if (s->test_flags == TEST_FLAGS_END &&
 448         event == CHR_EVENT_CLOSED) {
 449         s->test_flags = TEST_FLAGS_OK;
 450     }
 451 }
 452
 453 static void test_server_create_chr(TestServer *server, const gchar *opt)
 454 {
 455     gchar *chr_path;
 456
 457     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 458     server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
 459     g_free(chr_path);
 460
 461     qemu_chr_add_handlers(server->chr, chr_can_read, chr_read,
 462                           chr_event, server);
 463 }
 464
 465 static void test_server_listen(TestServer *server)
 466 {
 467     test_server_create_chr(server, ",server,nowait");
 468 }
 469
 470 static inline void test_server_connect(TestServer *server)
 471 {
 472     test_server_create_chr(server, ",reconnect=1");
 473 }
 474
 475 #define GET_QEMU_CMD(s)                                         \
 476     g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name,  \
 477                     (s)->socket_path, "", (s)->chr_name)
 478
 479 #define GET_QEMU_CMDE(s, mem, chr_opts, extra, ...)                     \
 480     g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
 481                     (s)->socket_path, (chr_opts), (s)->chr_name, ##__VA_ARGS__)
 482
 483 static gboolean _test_server_free(TestServer *server)
 484 {
 485     int i;
 486
 487     qemu_chr_delete(server->chr);
 488
 489     for (i = 0; i < server->fds_num; i++) {
 490         close(server->fds[i]);
 491     }
 492
 493     if (server->log_fd != -1) {
 494         close(server->log_fd);
 495     }
 496
 497     unlink(server->socket_path);
 498     g_free(server->socket_path);
 499
 500     unlink(server->mig_path);
 501     g_free(server->mig_path);
 502
 503     g_free(server->chr_name);
 504     g_free(server);
 505
 506     return FALSE;
 507 }
 508
 509 static void test_server_free(TestServer *server)
 510 {
 511     g_idle_add((GSourceFunc)_test_server_free, server);
 512 }
 513
 514 static void wait_for_log_fd(TestServer *s)
 515 {
 516     gint64 end_time;
 517
 518     g_mutex_lock(&s->data_mutex);
 519     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 520     while (s->log_fd == -1) {
 521         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 522             /* timeout has passed */
 523             g_assert(s->log_fd != -1);
 524             break;
 525         }
 526     }
 527
 528     g_mutex_unlock(&s->data_mutex);
 529 }
 530
 531 static void write_guest_mem(TestServer *s, uint32_t seed)
 532 {
 533     uint32_t *guest_mem;
 534     int i, j;
 535     size_t size;
 536
 537     wait_for_fds(s);
 538
 539     /* iterate all regions */
 540     for (i = 0; i < s->fds_num; i++) {
 541
 542         /* We'll write only the region statring at 0x0 */
 543         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 544             continue;
 545         }
 546
 547         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 548
 549         size = s->memory.regions[i].memory_size +
 550             s->memory.regions[i].mmap_offset;
 551
 552         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 553                          MAP_SHARED, s->fds[i], 0);
 554
 555         g_assert(guest_mem != MAP_FAILED);
 556         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 557
 558         for (j = 0; j < 256; j++) {
 559             guest_mem[j] = seed + j;
 560         }
 561
 562         munmap(guest_mem, s->memory.regions[i].memory_size);
 563         break;
 564     }
 565 }
 566
 567 static guint64 get_log_size(TestServer *s)
 568 {
 569     guint64 log_size = 0;
 570     int i;
 571
 572     for (i = 0; i < s->memory.nregions; ++i) {
 573         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 574         guint64 last = range_get_last(reg->guest_phys_addr,
 575                                        reg->memory_size);
 576         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 577     }
 578
 579     return log_size;
 580 }
 581
 582 typedef struct TestMigrateSource {
 583     GSource source;
 584     TestServer *src;
 585     TestServer *dest;
 586 } TestMigrateSource;
 587
 588 static gboolean
 589 test_migrate_source_check(GSource *source)
 590 {
 591     TestMigrateSource *t = (TestMigrateSource *)source;
 592     gboolean overlap = t->src->rings && t->dest->rings;
 593
 594     g_assert(!overlap);
 595
 596     return FALSE;
 597 }
 598
 599 #if !GLIB_CHECK_VERSION(2,36,0)
 600 /* this callback is unnecessary with glib >2.36, the default
 601  * prepare for the source does the same */
 602 static gboolean
 603 test_migrate_source_prepare(GSource *source, gint *timeout)
 604 {
 605     *timeout = -1;
 606     return FALSE;
 607 }
 608 #endif
 609
 610 GSourceFuncs test_migrate_source_funcs = {
 611 #if !GLIB_CHECK_VERSION(2,36,0)
 612     .prepare = test_migrate_source_prepare,
 613 #endif
 614     .check = test_migrate_source_check,
 615 };
 616
 617 static void test_migrate(void)
 618 {
 619     TestServer *s = test_server_new("src");
 620     TestServer *dest = test_server_new("dest");
 621     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 622     QTestState *global = global_qtest, *from, *to;
 623     GSource *source;
 624     gchar *cmd;
 625     QDict *rsp;
 626     guint8 *log;
 627     guint64 size;
 628
 629     test_server_listen(s);
 630     test_server_listen(dest);
 631
 632     cmd = GET_QEMU_CMDE(s, 2, "", "");
 633     from = qtest_start(cmd);
 634     g_free(cmd);
 635
 636     init_virtio_dev(s);
 637     wait_for_fds(s);
 638     size = get_log_size(s);
 639     g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 640
 641     cmd = GET_QEMU_CMDE(dest, 2, "", " -incoming %s", uri);
 642     to = qtest_init(cmd);
 643     g_free(cmd);
 644
 645     source = g_source_new(&test_migrate_source_funcs,
 646                           sizeof(TestMigrateSource));
 647     ((TestMigrateSource *)source)->src = s;
 648     ((TestMigrateSource *)source)->dest = dest;
 649     g_source_attach(source, NULL);
 650
 651     /* slow down migration to have time to fiddle with log */
 652     /* TODO: qtest could learn to break on some places */
 653     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 654               "'arguments': { 'value': 10 } }");
 655     g_assert(qdict_haskey(rsp, "return"));
 656     QDECREF(rsp);
 657
 658     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 659                           "'arguments': { 'uri': '%s' } }",
 660                           uri);
 661     rsp = qmp(cmd);
 662     g_free(cmd);
 663     g_assert(qdict_haskey(rsp, "return"));
 664     QDECREF(rsp);
 665
 666     wait_for_log_fd(s);
 667
 668     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 669     g_assert(log != MAP_FAILED);
 670
 671     /* modify first page */
 672     write_guest_mem(s, 0x42);
 673     log[0] = 1;
 674     munmap(log, size);
 675
 676     /* speed things up */
 677     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 678               "'arguments': { 'value': 0 } }");
 679     g_assert(qdict_haskey(rsp, "return"));
 680     QDECREF(rsp);
 681
 682     qmp_eventwait("STOP");
 683
 684     global_qtest = to;
 685     qmp_eventwait("RESUME");
 686
 687     read_guest_mem(dest);
 688
 689     g_source_destroy(source);
 690     g_source_unref(source);
 691
 692     qtest_quit(to);
 693     test_server_free(dest);
 694     qtest_quit(from);
 695     test_server_free(s);
 696     g_free(uri);
 697
 698     global_qtest = global;
 699 }
 700
 701 static void wait_for_rings_started(TestServer *s, size_t count)
 702 {
 703     gint64 end_time;
 704
 705     g_mutex_lock(&s->data_mutex);
 706     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 707     while (ctpop64(s->rings) != count) {
 708         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 709             /* timeout has passed */
 710             g_assert_cmpint(ctpop64(s->rings), ==, count);
 711             break;
 712         }
 713     }
 714
 715     g_mutex_unlock(&s->data_mutex);
 716 }
 717
 718 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 719 static gboolean
 720 reconnect_cb(gpointer user_data)
 721 {
 722     TestServer *s = user_data;
 723
 724     qemu_chr_disconnect(s->chr);
 725
 726     return FALSE;
 727 }
 728
 729 static gpointer
 730 connect_thread(gpointer data)
 731 {
 732     TestServer *s = data;
 733
 734     /* wait for qemu to start before first try, to avoid extra warnings */
 735     g_usleep(G_USEC_PER_SEC);
 736     test_server_connect(s);
 737
 738     return NULL;
 739 }
 740
 741 static void test_reconnect_subprocess(void)
 742 {
 743     TestServer *s = test_server_new("reconnect");
 744     char *cmd;
 745
 746     g_thread_new("connect", connect_thread, s);
 747     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 748     qtest_start(cmd);
 749     g_free(cmd);
 750
 751     init_virtio_dev(s);
 752     wait_for_fds(s);
 753     wait_for_rings_started(s, 2);
 754
 755     /* reconnect */
 756     s->fds_num = 0;
 757     s->rings = 0;
 758     g_idle_add(reconnect_cb, s);
 759     wait_for_fds(s);
 760     wait_for_rings_started(s, 2);
 761
 762     qtest_end();
 763     test_server_free(s);
 764     return;
 765 }
 766
 767 static void test_reconnect(void)
 768 {
 769     gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
 770                                   qtest_get_arch());
 771     g_test_trap_subprocess(path, 0, 0);
 772     g_test_trap_assert_passed();
 773     g_free(path);
 774 }
 775
 776 static void test_connect_fail_subprocess(void)
 777 {
 778     TestServer *s = test_server_new("connect-fail");
 779     char *cmd;
 780
 781     s->test_fail = true;
 782     g_thread_new("connect", connect_thread, s);
 783     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 784     qtest_start(cmd);
 785     g_free(cmd);
 786
 787     init_virtio_dev(s);
 788     wait_for_fds(s);
 789     wait_for_rings_started(s, 2);
 790
 791     qtest_end();
 792     test_server_free(s);
 793 }
 794
 795 static void test_connect_fail(void)
 796 {
 797     gchar *path = g_strdup_printf("/%s/vhost-user/connect-fail/subprocess",
 798                                   qtest_get_arch());
 799     g_test_trap_subprocess(path, 0, 0);
 800     g_test_trap_assert_passed();
 801     g_free(path);
 802 }
 803
 804 static void test_flags_mismatch_subprocess(void)
 805 {
 806     TestServer *s = test_server_new("flags-mismatch");
 807     char *cmd;
 808
 809     s->test_flags = TEST_FLAGS_DISCONNECT;
 810     g_thread_new("connect", connect_thread, s);
 811     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 812     qtest_start(cmd);
 813     g_free(cmd);
 814
 815     init_virtio_dev(s);
 816     wait_for_fds(s);
 817     wait_for_rings_started(s, 2);
 818
 819     qtest_end();
 820     test_server_free(s);
 821 }
 822
 823 static void test_flags_mismatch(void)
 824 {
 825     gchar *path = g_strdup_printf("/%s/vhost-user/flags-mismatch/subprocess",
 826                                   qtest_get_arch());
 827     g_test_trap_subprocess(path, 0, 0);
 828     g_test_trap_assert_passed();
 829     g_free(path);
 830 }
 831
 832 #endif
 833
 834 static QVirtioPCIDevice *virtio_net_pci_init(QPCIBus *bus, int slot)
 835 {
 836     QVirtioPCIDevice *dev;
 837
 838     dev = qvirtio_pci_device_find(bus, VIRTIO_ID_NET);
 839     g_assert(dev != NULL);
 840     g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_NET);
 841
 842     qvirtio_pci_device_enable(dev);
 843     qvirtio_reset(&qvirtio_pci, &dev->vdev);
 844     qvirtio_set_acknowledge(&qvirtio_pci, &dev->vdev);
 845     qvirtio_set_driver(&qvirtio_pci, &dev->vdev);
 846
 847     return dev;
 848 }
 849
 850 static void driver_init(const QVirtioBus *bus, QVirtioDevice *dev)
 851 {
 852     uint32_t features;
 853
 854     features = qvirtio_get_features(bus, dev);
 855     features = features & ~(QVIRTIO_F_BAD_FEATURE |
 856                             (1u << VIRTIO_RING_F_INDIRECT_DESC) |
 857                             (1u << VIRTIO_RING_F_EVENT_IDX));
 858     qvirtio_set_features(bus, dev, features);
 859
 860     qvirtio_set_driver_ok(bus, dev);
 861 }
 862
 863 #define PCI_SLOT                0x04
 864
 865 static void test_multiqueue(void)
 866 {
 867     const int queues = 2;
 868     TestServer *s = test_server_new("mq");
 869     QVirtioPCIDevice *dev;
 870     QPCIBus *bus;
 871     QVirtQueuePCI *vq[queues * 2];
 872     QGuestAllocator *alloc;
 873     char *cmd;
 874     int i;
 875
 876     s->queues = queues;
 877     test_server_listen(s);
 878
 879     cmd = g_strdup_printf(QEMU_CMD_MEM QEMU_CMD_CHR QEMU_CMD_NETDEV ",queues=%d "
 880                           "-device virtio-net-pci,netdev=net0,mq=on,vectors=%d",
 881                           512, 512, root, s->chr_name,
 882                           s->socket_path, "", s->chr_name,
 883                           queues, queues * 2 + 2);
 884     qtest_start(cmd);
 885     g_free(cmd);
 886
 887     bus = qpci_init_pc(NULL);
 888     dev = virtio_net_pci_init(bus, PCI_SLOT);
 889
 890     alloc = pc_alloc_init();
 891     for (i = 0; i < queues * 2; i++) {
 892         vq[i] = (QVirtQueuePCI *)qvirtqueue_setup(&qvirtio_pci, &dev->vdev,
 893                                               alloc, i);
 894     }
 895
 896     driver_init(&qvirtio_pci, &dev->vdev);
 897     wait_for_rings_started(s, queues * 2);
 898
 899     /* End test */
 900     for (i = 0; i < queues * 2; i++) {
 901         qvirtqueue_cleanup(&qvirtio_pci, &vq[i]->vq, alloc);
 902     }
 903     pc_alloc_uninit(alloc);
 904     qvirtio_pci_device_disable(dev);
 905     g_free(dev->pdev);
 906     g_free(dev);
 907     qpci_free_pc(bus);
 908     qtest_end();
 909
 910     test_server_free(s);
 911 }
 912
 913 int main(int argc, char **argv)
 914 {
 915     QTestState *s = NULL;
 916     TestServer *server = NULL;
 917     const char *hugefs;
 918     char *qemu_cmd = NULL;
 919     int ret;
 920     char template[] = "/tmp/vhost-test-XXXXXX";
 921     GMainLoop *loop;
 922     GThread *thread;
 923
 924     g_test_init(&argc, &argv, NULL);
 925
 926     module_call_init(MODULE_INIT_QOM);
 927     qemu_add_opts(&qemu_chardev_opts);
 928
 929     tmpfs = mkdtemp(template);
 930     if (!tmpfs) {
 931         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 932     }
 933     g_assert(tmpfs);
 934
 935     hugefs = getenv("QTEST_HUGETLBFS_PATH");
 936     if (hugefs) {
 937         root = init_hugepagefs(hugefs);
 938         g_assert(root);
 939     } else {
 940         root = tmpfs;
 941     }
 942
 943     server = test_server_new("test");
 944     test_server_listen(server);
 945
 946     loop = g_main_loop_new(NULL, FALSE);
 947     /* run the main loop thread so the chardev may operate */
 948     thread = g_thread_new(NULL, thread_function, loop);
 949
 950     qemu_cmd = GET_QEMU_CMD(server);
 951
 952     s = qtest_start(qemu_cmd);
 953     g_free(qemu_cmd);
 954     init_virtio_dev(server);
 955
 956     qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
 957     qtest_add_func("/vhost-user/migrate", test_migrate);
 958     qtest_add_func("/vhost-user/multiqueue", test_multiqueue);
 959 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 960     qtest_add_func("/vhost-user/reconnect/subprocess",
 961                    test_reconnect_subprocess);
 962     qtest_add_func("/vhost-user/reconnect", test_reconnect);
 963     qtest_add_func("/vhost-user/connect-fail/subprocess",
 964                    test_connect_fail_subprocess);
 965     qtest_add_func("/vhost-user/connect-fail", test_connect_fail);
 966     qtest_add_func("/vhost-user/flags-mismatch/subprocess",
 967                    test_flags_mismatch_subprocess);
 968     qtest_add_func("/vhost-user/flags-mismatch", test_flags_mismatch);
 969 #endif
 970
 971     ret = g_test_run();
 972
 973     if (s) {
 974         qtest_quit(s);
 975     }
 976
 977     /* cleanup */
 978     test_server_free(server);
 979
 980     /* finish the helper thread and dispatch pending sources */
 981     g_main_loop_quit(loop);
 982     g_thread_join(thread);
 983     while (g_main_context_pending(NULL)) {
 984         g_main_context_iteration (NULL, TRUE);
 985     }
 986     g_main_loop_unref(loop);
 987
 988     ret = rmdir(tmpfs);
 989     if (ret != 0) {
 990         g_test_message("unable to rmdir: path (%s): %s\n",
 991                        tmpfs, strerror(errno));
 992     }
 993     g_assert_cmpint(ret, ==, 0);
 994
 995     return ret;
 996 }