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
  20 #include <linux/vhost.h>
  21 #include <sys/vfs.h>
  22
  23 /* GLIB version compatibility flags */
  24 #if !GLIB_CHECK_VERSION(2, 26, 0)
  25 #define G_TIME_SPAN_SECOND              (G_GINT64_CONSTANT(1000000))
  26 #endif
  27
  28 #if GLIB_CHECK_VERSION(2, 28, 0)
  29 #define HAVE_MONOTONIC_TIME
  30 #endif
  31
  32 #define QEMU_CMD_ACCEL  " -machine accel=tcg"
  33 #define QEMU_CMD_MEM    " -m %d -object memory-backend-file,id=mem,size=%dM,"\
  34                         "mem-path=%s,share=on -numa node,memdev=mem"
  35 #define QEMU_CMD_CHR    " -chardev socket,id=%s,path=%s%s"
  36 #define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=%s,vhostforce"
  37 #define QEMU_CMD_NET    " -device virtio-net-pci,netdev=net0,romfile=./pc-bios/pxe-virtio.rom"
  38
  39 #define QEMU_CMD        QEMU_CMD_ACCEL QEMU_CMD_MEM QEMU_CMD_CHR \
  40                         QEMU_CMD_NETDEV QEMU_CMD_NET
  41
  42 #define HUGETLBFS_MAGIC       0x958458f6
  43
  44 /*********** FROM hw/virtio/vhost-user.c *************************************/
  45
  46 #define VHOST_MEMORY_MAX_NREGIONS    8
  47
  48 #define VHOST_USER_F_PROTOCOL_FEATURES 30
  49 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  50
  51 #define VHOST_LOG_PAGE 0x1000
  52
  53 typedef enum VhostUserRequest {
  54     VHOST_USER_NONE = 0,
  55     VHOST_USER_GET_FEATURES = 1,
  56     VHOST_USER_SET_FEATURES = 2,
  57     VHOST_USER_SET_OWNER = 3,
  58     VHOST_USER_RESET_OWNER = 4,
  59     VHOST_USER_SET_MEM_TABLE = 5,
  60     VHOST_USER_SET_LOG_BASE = 6,
  61     VHOST_USER_SET_LOG_FD = 7,
  62     VHOST_USER_SET_VRING_NUM = 8,
  63     VHOST_USER_SET_VRING_ADDR = 9,
  64     VHOST_USER_SET_VRING_BASE = 10,
  65     VHOST_USER_GET_VRING_BASE = 11,
  66     VHOST_USER_SET_VRING_KICK = 12,
  67     VHOST_USER_SET_VRING_CALL = 13,
  68     VHOST_USER_SET_VRING_ERR = 14,
  69     VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  70     VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  71     VHOST_USER_SET_VRING_ENABLE = 18,
  72     VHOST_USER_MAX
  73 } VhostUserRequest;
  74
  75 typedef struct VhostUserMemoryRegion {
  76     uint64_t guest_phys_addr;
  77     uint64_t memory_size;
  78     uint64_t userspace_addr;
  79     uint64_t mmap_offset;
  80 } VhostUserMemoryRegion;
  81
  82 typedef struct VhostUserMemory {
  83     uint32_t nregions;
  84     uint32_t padding;
  85     VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  86 } VhostUserMemory;
  87
  88 typedef struct VhostUserLog {
  89     uint64_t mmap_size;
  90     uint64_t mmap_offset;
  91 } VhostUserLog;
  92
  93 typedef struct VhostUserMsg {
  94     VhostUserRequest request;
  95
  96 #define VHOST_USER_VERSION_MASK     (0x3)
  97 #define VHOST_USER_REPLY_MASK       (0x1<<2)
  98     uint32_t flags;
  99     uint32_t size; /* the following payload size */
 100     union {
 101 #define VHOST_USER_VRING_IDX_MASK   (0xff)
 102 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 103         uint64_t u64;
 104         struct vhost_vring_state state;
 105         struct vhost_vring_addr addr;
 106         VhostUserMemory memory;
 107         VhostUserLog log;
 108     } payload;
 109 } QEMU_PACKED VhostUserMsg;
 110
 111 static VhostUserMsg m __attribute__ ((unused));
 112 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
 113                             + sizeof(m.flags) \
 114                             + sizeof(m.size))
 115
 116 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
 117
 118 /* The version of the protocol we support */
 119 #define VHOST_USER_VERSION    (0x1)
 120 /*****************************************************************************/
 121
 122 typedef struct TestServer {
 123     gchar *socket_path;
 124     gchar *mig_path;
 125     gchar *chr_name;
 126     CharDriverState *chr;
 127     int fds_num;
 128     int fds[VHOST_MEMORY_MAX_NREGIONS];
 129     VhostUserMemory memory;
 130     CompatGMutex data_mutex;
 131     CompatGCond data_cond;
 132     int log_fd;
 133     uint64_t rings;
 134 } TestServer;
 135
 136 static const char *tmpfs;
 137 static const char *root;
 138
 139 static void wait_for_fds(TestServer *s)
 140 {
 141     gint64 end_time;
 142
 143     g_mutex_lock(&s->data_mutex);
 144
 145     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 146     while (!s->fds_num) {
 147         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 148             /* timeout has passed */
 149             g_assert(s->fds_num);
 150             break;
 151         }
 152     }
 153
 154     /* check for sanity */
 155     g_assert_cmpint(s->fds_num, >, 0);
 156     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 157
 158     g_mutex_unlock(&s->data_mutex);
 159 }
 160
 161 static void read_guest_mem(const void *data)
 162 {
 163     TestServer *s = (void *)data;
 164     uint32_t *guest_mem;
 165     int i, j;
 166     size_t size;
 167
 168     wait_for_fds(s);
 169
 170     g_mutex_lock(&s->data_mutex);
 171
 172     /* iterate all regions */
 173     for (i = 0; i < s->fds_num; i++) {
 174
 175         /* We'll check only the region statring at 0x0*/
 176         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 177             continue;
 178         }
 179
 180         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 181
 182         size = s->memory.regions[i].memory_size +
 183             s->memory.regions[i].mmap_offset;
 184
 185         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 186                          MAP_SHARED, s->fds[i], 0);
 187
 188         g_assert(guest_mem != MAP_FAILED);
 189         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 190
 191         for (j = 0; j < 256; j++) {
 192             uint32_t a = readl(s->memory.regions[i].guest_phys_addr + j*4);
 193             uint32_t b = guest_mem[j];
 194
 195             g_assert_cmpint(a, ==, b);
 196         }
 197
 198         munmap(guest_mem, s->memory.regions[i].memory_size);
 199     }
 200
 201     g_mutex_unlock(&s->data_mutex);
 202 }
 203
 204 static void *thread_function(void *data)
 205 {
 206     GMainLoop *loop = data;
 207     g_main_loop_run(loop);
 208     return NULL;
 209 }
 210
 211 static int chr_can_read(void *opaque)
 212 {
 213     return VHOST_USER_HDR_SIZE;
 214 }
 215
 216 static void chr_read(void *opaque, const uint8_t *buf, int size)
 217 {
 218     TestServer *s = opaque;
 219     CharDriverState *chr = s->chr;
 220     VhostUserMsg msg;
 221     uint8_t *p = (uint8_t *) &msg;
 222     int fd;
 223
 224     if (size != VHOST_USER_HDR_SIZE) {
 225         g_test_message("Wrong message size received %d\n", size);
 226         return;
 227     }
 228
 229     g_mutex_lock(&s->data_mutex);
 230     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 231
 232     if (msg.size) {
 233         p += VHOST_USER_HDR_SIZE;
 234         size = qemu_chr_fe_read_all(chr, p, msg.size);
 235         if (size != msg.size) {
 236             g_test_message("Wrong message size received %d != %d\n",
 237                            size, msg.size);
 238             return;
 239         }
 240     }
 241
 242     switch (msg.request) {
 243     case VHOST_USER_GET_FEATURES:
 244         /* send back features to qemu */
 245         msg.flags |= VHOST_USER_REPLY_MASK;
 246         msg.size = sizeof(m.payload.u64);
 247         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 248             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 249         p = (uint8_t *) &msg;
 250         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 251         break;
 252
 253     case VHOST_USER_SET_FEATURES:
 254         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 255                         !=, 0ULL);
 256         break;
 257
 258     case VHOST_USER_GET_PROTOCOL_FEATURES:
 259         /* send back features to qemu */
 260         msg.flags |= VHOST_USER_REPLY_MASK;
 261         msg.size = sizeof(m.payload.u64);
 262         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 263         p = (uint8_t *) &msg;
 264         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 265         break;
 266
 267     case VHOST_USER_GET_VRING_BASE:
 268         /* send back vring base to qemu */
 269         msg.flags |= VHOST_USER_REPLY_MASK;
 270         msg.size = sizeof(m.payload.state);
 271         msg.payload.state.num = 0;
 272         p = (uint8_t *) &msg;
 273         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 274
 275         assert(msg.payload.state.index < 2);
 276         s->rings &= ~(0x1ULL << msg.payload.state.index);
 277         break;
 278
 279     case VHOST_USER_SET_MEM_TABLE:
 280         /* received the mem table */
 281         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 282         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds, G_N_ELEMENTS(s->fds));
 283
 284         /* signal the test that it can continue */
 285         g_cond_signal(&s->data_cond);
 286         break;
 287
 288     case VHOST_USER_SET_VRING_KICK:
 289     case VHOST_USER_SET_VRING_CALL:
 290         /* consume the fd */
 291         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 292         /*
 293          * This is a non-blocking eventfd.
 294          * The receive function forces it to be blocking,
 295          * so revert it back to non-blocking.
 296          */
 297         qemu_set_nonblock(fd);
 298         break;
 299
 300     case VHOST_USER_SET_LOG_BASE:
 301         if (s->log_fd != -1) {
 302             close(s->log_fd);
 303             s->log_fd = -1;
 304         }
 305         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 306         msg.flags |= VHOST_USER_REPLY_MASK;
 307         msg.size = 0;
 308         p = (uint8_t *) &msg;
 309         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 310
 311         g_cond_signal(&s->data_cond);
 312         break;
 313
 314     case VHOST_USER_SET_VRING_BASE:
 315         assert(msg.payload.state.index < 2);
 316         s->rings |= 0x1ULL << msg.payload.state.index;
 317         break;
 318
 319     default:
 320         break;
 321     }
 322
 323     g_mutex_unlock(&s->data_mutex);
 324 }
 325
 326 static const char *init_hugepagefs(const char *path)
 327 {
 328     struct statfs fs;
 329     int ret;
 330
 331     if (access(path, R_OK | W_OK | X_OK)) {
 332         g_test_message("access on path (%s): %s\n", path, strerror(errno));
 333         return NULL;
 334     }
 335
 336     do {
 337         ret = statfs(path, &fs);
 338     } while (ret != 0 && errno == EINTR);
 339
 340     if (ret != 0) {
 341         g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
 342         return NULL;
 343     }
 344
 345     if (fs.f_type != HUGETLBFS_MAGIC) {
 346         g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
 347         return NULL;
 348     }
 349
 350     return path;
 351 }
 352
 353 static TestServer *test_server_new(const gchar *name)
 354 {
 355     TestServer *server = g_new0(TestServer, 1);
 356
 357     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 358     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 359     server->chr_name = g_strdup_printf("chr-%s", name);
 360
 361     g_mutex_init(&server->data_mutex);
 362     g_cond_init(&server->data_cond);
 363
 364     server->log_fd = -1;
 365
 366     return server;
 367 }
 368
 369 static void test_server_create_chr(TestServer *server, const gchar *opt)
 370 {
 371     gchar *chr_path;
 372
 373     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 374     server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
 375     g_free(chr_path);
 376
 377     qemu_chr_add_handlers(server->chr, chr_can_read, chr_read, NULL, server);
 378 }
 379
 380 static void test_server_listen(TestServer *server)
 381 {
 382     test_server_create_chr(server, ",server,nowait");
 383 }
 384
 385 static inline void test_server_connect(TestServer *server)
 386 {
 387     test_server_create_chr(server, ",reconnect=1");
 388 }
 389
 390 #define GET_QEMU_CMD(s)                                         \
 391     g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name,  \
 392                     (s)->socket_path, "", (s)->chr_name)
 393
 394 #define GET_QEMU_CMDE(s, mem, chr_opts, extra, ...)                     \
 395     g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
 396                     (s)->socket_path, (chr_opts), (s)->chr_name, ##__VA_ARGS__)
 397
 398 static gboolean _test_server_free(TestServer *server)
 399 {
 400     int i;
 401
 402     qemu_chr_delete(server->chr);
 403
 404     for (i = 0; i < server->fds_num; i++) {
 405         close(server->fds[i]);
 406     }
 407
 408     if (server->log_fd != -1) {
 409         close(server->log_fd);
 410     }
 411
 412     unlink(server->socket_path);
 413     g_free(server->socket_path);
 414
 415     unlink(server->mig_path);
 416     g_free(server->mig_path);
 417
 418     g_free(server->chr_name);
 419     g_free(server);
 420
 421     return FALSE;
 422 }
 423
 424 static void test_server_free(TestServer *server)
 425 {
 426     g_idle_add((GSourceFunc)_test_server_free, server);
 427 }
 428
 429 static void wait_for_log_fd(TestServer *s)
 430 {
 431     gint64 end_time;
 432
 433     g_mutex_lock(&s->data_mutex);
 434     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 435     while (s->log_fd == -1) {
 436         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 437             /* timeout has passed */
 438             g_assert(s->log_fd != -1);
 439             break;
 440         }
 441     }
 442
 443     g_mutex_unlock(&s->data_mutex);
 444 }
 445
 446 static void write_guest_mem(TestServer *s, uint32_t seed)
 447 {
 448     uint32_t *guest_mem;
 449     int i, j;
 450     size_t size;
 451
 452     wait_for_fds(s);
 453
 454     /* iterate all regions */
 455     for (i = 0; i < s->fds_num; i++) {
 456
 457         /* We'll write only the region statring at 0x0 */
 458         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 459             continue;
 460         }
 461
 462         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 463
 464         size = s->memory.regions[i].memory_size +
 465             s->memory.regions[i].mmap_offset;
 466
 467         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 468                          MAP_SHARED, s->fds[i], 0);
 469
 470         g_assert(guest_mem != MAP_FAILED);
 471         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 472
 473         for (j = 0; j < 256; j++) {
 474             guest_mem[j] = seed + j;
 475         }
 476
 477         munmap(guest_mem, s->memory.regions[i].memory_size);
 478         break;
 479     }
 480 }
 481
 482 static guint64 get_log_size(TestServer *s)
 483 {
 484     guint64 log_size = 0;
 485     int i;
 486
 487     for (i = 0; i < s->memory.nregions; ++i) {
 488         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 489         guint64 last = range_get_last(reg->guest_phys_addr,
 490                                        reg->memory_size);
 491         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 492     }
 493
 494     return log_size;
 495 }
 496
 497 typedef struct TestMigrateSource {
 498     GSource source;
 499     TestServer *src;
 500     TestServer *dest;
 501 } TestMigrateSource;
 502
 503 static gboolean
 504 test_migrate_source_check(GSource *source)
 505 {
 506     TestMigrateSource *t = (TestMigrateSource *)source;
 507     gboolean overlap = t->src->rings && t->dest->rings;
 508
 509     g_assert(!overlap);
 510
 511     return FALSE;
 512 }
 513
 514 #if !GLIB_CHECK_VERSION(2,36,0)
 515 /* this callback is unnecessary with glib >2.36, the default
 516  * prepare for the source does the same */
 517 static gboolean
 518 test_migrate_source_prepare(GSource *source, gint *timeout)
 519 {
 520     *timeout = -1;
 521     return FALSE;
 522 }
 523 #endif
 524
 525 GSourceFuncs test_migrate_source_funcs = {
 526 #if !GLIB_CHECK_VERSION(2,36,0)
 527     .prepare = test_migrate_source_prepare,
 528 #endif
 529     .check = test_migrate_source_check,
 530 };
 531
 532 static void test_migrate(void)
 533 {
 534     TestServer *s = test_server_new("src");
 535     TestServer *dest = test_server_new("dest");
 536     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 537     QTestState *global = global_qtest, *from, *to;
 538     GSource *source;
 539     gchar *cmd;
 540     QDict *rsp;
 541     guint8 *log;
 542     guint64 size;
 543
 544     test_server_listen(s);
 545     test_server_listen(dest);
 546
 547     cmd = GET_QEMU_CMDE(s, 2, "", "");
 548     from = qtest_start(cmd);
 549     g_free(cmd);
 550
 551     wait_for_fds(s);
 552     size = get_log_size(s);
 553     g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 554
 555     cmd = GET_QEMU_CMDE(dest, 2, "", " -incoming %s", uri);
 556     to = qtest_init(cmd);
 557     g_free(cmd);
 558
 559     source = g_source_new(&test_migrate_source_funcs,
 560                           sizeof(TestMigrateSource));
 561     ((TestMigrateSource *)source)->src = s;
 562     ((TestMigrateSource *)source)->dest = dest;
 563     g_source_attach(source, NULL);
 564
 565     /* slow down migration to have time to fiddle with log */
 566     /* TODO: qtest could learn to break on some places */
 567     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 568               "'arguments': { 'value': 10 } }");
 569     g_assert(qdict_haskey(rsp, "return"));
 570     QDECREF(rsp);
 571
 572     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 573                           "'arguments': { 'uri': '%s' } }",
 574                           uri);
 575     rsp = qmp(cmd);
 576     g_free(cmd);
 577     g_assert(qdict_haskey(rsp, "return"));
 578     QDECREF(rsp);
 579
 580     wait_for_log_fd(s);
 581
 582     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 583     g_assert(log != MAP_FAILED);
 584
 585     /* modify first page */
 586     write_guest_mem(s, 0x42);
 587     log[0] = 1;
 588     munmap(log, size);
 589
 590     /* speed things up */
 591     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 592               "'arguments': { 'value': 0 } }");
 593     g_assert(qdict_haskey(rsp, "return"));
 594     QDECREF(rsp);
 595
 596     qmp_eventwait("STOP");
 597
 598     global_qtest = to;
 599     qmp_eventwait("RESUME");
 600
 601     read_guest_mem(dest);
 602
 603     g_source_destroy(source);
 604     g_source_unref(source);
 605
 606     qtest_quit(to);
 607     test_server_free(dest);
 608     qtest_quit(from);
 609     test_server_free(s);
 610     g_free(uri);
 611
 612     global_qtest = global;
 613 }
 614
 615 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 616 static void wait_for_rings_started(TestServer *s, size_t count)
 617 {
 618     gint64 end_time;
 619
 620     g_mutex_lock(&s->data_mutex);
 621     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 622     while (ctpop64(s->rings) != count) {
 623         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 624             /* timeout has passed */
 625             g_assert_cmpint(ctpop64(s->rings), ==, count);
 626             break;
 627         }
 628     }
 629
 630     g_mutex_unlock(&s->data_mutex);
 631 }
 632
 633 static gboolean
 634 reconnect_cb(gpointer user_data)
 635 {
 636     TestServer *s = user_data;
 637
 638     qemu_chr_disconnect(s->chr);
 639
 640     return FALSE;
 641 }
 642
 643 static gpointer
 644 connect_thread(gpointer data)
 645 {
 646     TestServer *s = data;
 647
 648     /* wait for qemu to start before first try, to avoid extra warnings */
 649     g_usleep(G_USEC_PER_SEC);
 650     test_server_connect(s);
 651
 652     return NULL;
 653 }
 654
 655 static void test_reconnect_subprocess(void)
 656 {
 657     TestServer *s = test_server_new("reconnect");
 658     char *cmd;
 659
 660     g_thread_new("connect", connect_thread, s);
 661     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 662     qtest_start(cmd);
 663     g_free(cmd);
 664
 665     wait_for_fds(s);
 666     wait_for_rings_started(s, 2);
 667
 668     /* reconnect */
 669     s->fds_num = 0;
 670     s->rings = 0;
 671     g_idle_add(reconnect_cb, s);
 672     wait_for_fds(s);
 673     wait_for_rings_started(s, 2);
 674
 675     qtest_end();
 676     test_server_free(s);
 677     return;
 678 }
 679
 680 static void test_reconnect(void)
 681 {
 682     gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
 683                                   qtest_get_arch());
 684     g_test_trap_subprocess(path, 0, 0);
 685     g_test_trap_assert_passed();
 686     g_free(path);
 687 }
 688 #endif
 689
 690 int main(int argc, char **argv)
 691 {
 692     QTestState *s = NULL;
 693     TestServer *server = NULL;
 694     const char *hugefs;
 695     char *qemu_cmd = NULL;
 696     int ret;
 697     char template[] = "/tmp/vhost-test-XXXXXX";
 698     GMainLoop *loop;
 699     GThread *thread;
 700
 701     g_test_init(&argc, &argv, NULL);
 702
 703     module_call_init(MODULE_INIT_QOM);
 704     qemu_add_opts(&qemu_chardev_opts);
 705
 706     tmpfs = mkdtemp(template);
 707     if (!tmpfs) {
 708         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 709     }
 710     g_assert(tmpfs);
 711
 712     hugefs = getenv("QTEST_HUGETLBFS_PATH");
 713     if (hugefs) {
 714         root = init_hugepagefs(hugefs);
 715         g_assert(root);
 716     } else {
 717         root = tmpfs;
 718     }
 719
 720     server = test_server_new("test");
 721     test_server_listen(server);
 722
 723     loop = g_main_loop_new(NULL, FALSE);
 724     /* run the main loop thread so the chardev may operate */
 725     thread = g_thread_new(NULL, thread_function, loop);
 726
 727     qemu_cmd = GET_QEMU_CMD(server);
 728
 729     s = qtest_start(qemu_cmd);
 730     g_free(qemu_cmd);
 731
 732     qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
 733     qtest_add_func("/vhost-user/migrate", test_migrate);
 734 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 735     qtest_add_func("/vhost-user/reconnect/subprocess",
 736                    test_reconnect_subprocess);
 737     qtest_add_func("/vhost-user/reconnect", test_reconnect);
 738 #endif
 739
 740     ret = g_test_run();
 741
 742     if (s) {
 743         qtest_quit(s);
 744     }
 745
 746     /* cleanup */
 747     test_server_free(server);
 748
 749     /* finish the helper thread and dispatch pending sources */
 750     g_main_loop_quit(loop);
 751     g_thread_join(thread);
 752     while (g_main_context_pending(NULL)) {
 753         g_main_context_iteration (NULL, TRUE);
 754     }
 755     g_main_loop_unref(loop);
 756
 757     ret = rmdir(tmpfs);
 758     if (ret != 0) {
 759         g_test_message("unable to rmdir: path (%s): %s\n",
 760                        tmpfs, strerror(errno));
 761     }
 762     g_assert_cmpint(ret, ==, 0);
 763
 764     return ret;
 765 }