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 "sysemu/char.h"
  17 #include "sysemu/sysemu.h"
  18
  19 #include <linux/vhost.h>
  20 #include <sys/vfs.h>
  21 #include <qemu/sockets.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     GMutex data_mutex;
 131     GCond data_cond;
 132     int log_fd;
 133     uint64_t rings;
 134 } TestServer;
 135
 136 #if !GLIB_CHECK_VERSION(2, 32, 0)
 137 static gboolean g_cond_wait_until(CompatGCond cond, CompatGMutex mutex,
 138                                   gint64 end_time)
 139 {
 140     gboolean ret = FALSE;
 141     end_time -= g_get_monotonic_time();
 142     GTimeVal time = { end_time / G_TIME_SPAN_SECOND,
 143                       end_time % G_TIME_SPAN_SECOND };
 144     ret = g_cond_timed_wait(cond, mutex, &time);
 145     return ret;
 146 }
 147 #endif
 148
 149 static const char *tmpfs;
 150 static const char *root;
 151
 152 static void wait_for_fds(TestServer *s)
 153 {
 154     gint64 end_time;
 155
 156     g_mutex_lock(&s->data_mutex);
 157
 158     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 159     while (!s->fds_num) {
 160         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 161             /* timeout has passed */
 162             g_assert(s->fds_num);
 163             break;
 164         }
 165     }
 166
 167     /* check for sanity */
 168     g_assert_cmpint(s->fds_num, >, 0);
 169     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 170
 171     g_mutex_unlock(&s->data_mutex);
 172 }
 173
 174 static void read_guest_mem(const void *data)
 175 {
 176     TestServer *s = (void *)data;
 177     uint32_t *guest_mem;
 178     int i, j;
 179     size_t size;
 180
 181     wait_for_fds(s);
 182
 183     g_mutex_lock(&s->data_mutex);
 184
 185     /* iterate all regions */
 186     for (i = 0; i < s->fds_num; i++) {
 187
 188         /* We'll check only the region statring at 0x0*/
 189         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 190             continue;
 191         }
 192
 193         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 194
 195         size = s->memory.regions[i].memory_size +
 196             s->memory.regions[i].mmap_offset;
 197
 198         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 199                          MAP_SHARED, s->fds[i], 0);
 200
 201         g_assert(guest_mem != MAP_FAILED);
 202         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 203
 204         for (j = 0; j < 256; j++) {
 205             uint32_t a = readl(s->memory.regions[i].guest_phys_addr + j*4);
 206             uint32_t b = guest_mem[j];
 207
 208             g_assert_cmpint(a, ==, b);
 209         }
 210
 211         munmap(guest_mem, s->memory.regions[i].memory_size);
 212     }
 213
 214     g_mutex_unlock(&s->data_mutex);
 215 }
 216
 217 static void *thread_function(void *data)
 218 {
 219     GMainLoop *loop = data;
 220     g_main_loop_run(loop);
 221     return NULL;
 222 }
 223
 224 static int chr_can_read(void *opaque)
 225 {
 226     return VHOST_USER_HDR_SIZE;
 227 }
 228
 229 static void chr_read(void *opaque, const uint8_t *buf, int size)
 230 {
 231     TestServer *s = opaque;
 232     CharDriverState *chr = s->chr;
 233     VhostUserMsg msg;
 234     uint8_t *p = (uint8_t *) &msg;
 235     int fd;
 236
 237     if (size != VHOST_USER_HDR_SIZE) {
 238         g_test_message("Wrong message size received %d\n", size);
 239         return;
 240     }
 241
 242     g_mutex_lock(&s->data_mutex);
 243     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 244
 245     if (msg.size) {
 246         p += VHOST_USER_HDR_SIZE;
 247         size = qemu_chr_fe_read_all(chr, p, msg.size);
 248         if (size != msg.size) {
 249             g_test_message("Wrong message size received %d != %d\n",
 250                            size, msg.size);
 251             return;
 252         }
 253     }
 254
 255     switch (msg.request) {
 256     case VHOST_USER_GET_FEATURES:
 257         /* send back features to qemu */
 258         msg.flags |= VHOST_USER_REPLY_MASK;
 259         msg.size = sizeof(m.payload.u64);
 260         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 261             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 262         p = (uint8_t *) &msg;
 263         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 264         break;
 265
 266     case VHOST_USER_SET_FEATURES:
 267         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 268                         !=, 0ULL);
 269         break;
 270
 271     case VHOST_USER_GET_PROTOCOL_FEATURES:
 272         /* send back features to qemu */
 273         msg.flags |= VHOST_USER_REPLY_MASK;
 274         msg.size = sizeof(m.payload.u64);
 275         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 276         p = (uint8_t *) &msg;
 277         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 278         break;
 279
 280     case VHOST_USER_GET_VRING_BASE:
 281         /* send back vring base to qemu */
 282         msg.flags |= VHOST_USER_REPLY_MASK;
 283         msg.size = sizeof(m.payload.state);
 284         msg.payload.state.num = 0;
 285         p = (uint8_t *) &msg;
 286         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 287
 288         assert(msg.payload.state.index < 2);
 289         s->rings &= ~(0x1ULL << msg.payload.state.index);
 290         break;
 291
 292     case VHOST_USER_SET_MEM_TABLE:
 293         /* received the mem table */
 294         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 295         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds, G_N_ELEMENTS(s->fds));
 296
 297         /* signal the test that it can continue */
 298         g_cond_signal(&s->data_cond);
 299         break;
 300
 301     case VHOST_USER_SET_VRING_KICK:
 302     case VHOST_USER_SET_VRING_CALL:
 303         /* consume the fd */
 304         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 305         /*
 306          * This is a non-blocking eventfd.
 307          * The receive function forces it to be blocking,
 308          * so revert it back to non-blocking.
 309          */
 310         qemu_set_nonblock(fd);
 311         break;
 312
 313     case VHOST_USER_SET_LOG_BASE:
 314         if (s->log_fd != -1) {
 315             close(s->log_fd);
 316             s->log_fd = -1;
 317         }
 318         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 319         msg.flags |= VHOST_USER_REPLY_MASK;
 320         msg.size = 0;
 321         p = (uint8_t *) &msg;
 322         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 323
 324         g_cond_signal(&s->data_cond);
 325         break;
 326
 327     case VHOST_USER_SET_VRING_BASE:
 328         assert(msg.payload.state.index < 2);
 329         s->rings |= 0x1ULL << msg.payload.state.index;
 330         break;
 331
 332     default:
 333         break;
 334     }
 335
 336     g_mutex_unlock(&s->data_mutex);
 337 }
 338
 339 static const char *init_hugepagefs(const char *path)
 340 {
 341     struct statfs fs;
 342     int ret;
 343
 344     if (access(path, R_OK | W_OK | X_OK)) {
 345         g_test_message("access on path (%s): %s\n", path, strerror(errno));
 346         return NULL;
 347     }
 348
 349     do {
 350         ret = statfs(path, &fs);
 351     } while (ret != 0 && errno == EINTR);
 352
 353     if (ret != 0) {
 354         g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
 355         return NULL;
 356     }
 357
 358     if (fs.f_type != HUGETLBFS_MAGIC) {
 359         g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
 360         return NULL;
 361     }
 362
 363     return path;
 364 }
 365
 366 static TestServer *test_server_new(const gchar *name)
 367 {
 368     TestServer *server = g_new0(TestServer, 1);
 369
 370     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 371     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 372     server->chr_name = g_strdup_printf("chr-%s", name);
 373
 374     g_mutex_init(&server->data_mutex);
 375     g_cond_init(&server->data_cond);
 376
 377     server->log_fd = -1;
 378
 379     return server;
 380 }
 381
 382 static void test_server_create_chr(TestServer *server, const gchar *opt)
 383 {
 384     gchar *chr_path;
 385
 386     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 387     server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
 388     g_free(chr_path);
 389
 390     qemu_chr_add_handlers(server->chr, chr_can_read, chr_read, NULL, server);
 391 }
 392
 393 static void test_server_listen(TestServer *server)
 394 {
 395     test_server_create_chr(server, ",server,nowait");
 396 }
 397
 398 static inline void test_server_connect(TestServer *server)
 399 {
 400     test_server_create_chr(server, ",reconnect=1");
 401 }
 402
 403 #define GET_QEMU_CMD(s)                                         \
 404     g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name,  \
 405                     (s)->socket_path, "", (s)->chr_name)
 406
 407 #define GET_QEMU_CMDE(s, mem, chr_opts, extra, ...)                     \
 408     g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
 409                     (s)->socket_path, (chr_opts), (s)->chr_name, ##__VA_ARGS__)
 410
 411 static gboolean _test_server_free(TestServer *server)
 412 {
 413     int i;
 414
 415     qemu_chr_delete(server->chr);
 416
 417     for (i = 0; i < server->fds_num; i++) {
 418         close(server->fds[i]);
 419     }
 420
 421     if (server->log_fd != -1) {
 422         close(server->log_fd);
 423     }
 424
 425     unlink(server->socket_path);
 426     g_free(server->socket_path);
 427
 428     unlink(server->mig_path);
 429     g_free(server->mig_path);
 430
 431     g_free(server->chr_name);
 432     g_free(server);
 433
 434     return FALSE;
 435 }
 436
 437 static void test_server_free(TestServer *server)
 438 {
 439     g_idle_add((GSourceFunc)_test_server_free, server);
 440 }
 441
 442 static void wait_for_log_fd(TestServer *s)
 443 {
 444     gint64 end_time;
 445
 446     g_mutex_lock(&s->data_mutex);
 447     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 448     while (s->log_fd == -1) {
 449         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 450             /* timeout has passed */
 451             g_assert(s->log_fd != -1);
 452             break;
 453         }
 454     }
 455
 456     g_mutex_unlock(&s->data_mutex);
 457 }
 458
 459 static void write_guest_mem(TestServer *s, uint32_t seed)
 460 {
 461     uint32_t *guest_mem;
 462     int i, j;
 463     size_t size;
 464
 465     wait_for_fds(s);
 466
 467     /* iterate all regions */
 468     for (i = 0; i < s->fds_num; i++) {
 469
 470         /* We'll write only the region statring at 0x0 */
 471         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 472             continue;
 473         }
 474
 475         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 476
 477         size = s->memory.regions[i].memory_size +
 478             s->memory.regions[i].mmap_offset;
 479
 480         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 481                          MAP_SHARED, s->fds[i], 0);
 482
 483         g_assert(guest_mem != MAP_FAILED);
 484         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 485
 486         for (j = 0; j < 256; j++) {
 487             guest_mem[j] = seed + j;
 488         }
 489
 490         munmap(guest_mem, s->memory.regions[i].memory_size);
 491         break;
 492     }
 493 }
 494
 495 static guint64 get_log_size(TestServer *s)
 496 {
 497     guint64 log_size = 0;
 498     int i;
 499
 500     for (i = 0; i < s->memory.nregions; ++i) {
 501         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 502         guint64 last = range_get_last(reg->guest_phys_addr,
 503                                        reg->memory_size);
 504         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 505     }
 506
 507     return log_size;
 508 }
 509
 510 typedef struct TestMigrateSource {
 511     GSource source;
 512     TestServer *src;
 513     TestServer *dest;
 514 } TestMigrateSource;
 515
 516 static gboolean
 517 test_migrate_source_check(GSource *source)
 518 {
 519     TestMigrateSource *t = (TestMigrateSource *)source;
 520     gboolean overlap = t->src->rings && t->dest->rings;
 521
 522     g_assert(!overlap);
 523
 524     return FALSE;
 525 }
 526
 527 #if !GLIB_CHECK_VERSION(2,36,0)
 528 /* this callback is unnecessary with glib >2.36, the default
 529  * prepare for the source does the same */
 530 static gboolean
 531 test_migrate_source_prepare(GSource *source, gint *timeout)
 532 {
 533     *timeout = -1;
 534     return FALSE;
 535 }
 536 #endif
 537
 538 GSourceFuncs test_migrate_source_funcs = {
 539 #if !GLIB_CHECK_VERSION(2,36,0)
 540     .prepare = test_migrate_source_prepare,
 541 #endif
 542     .check = test_migrate_source_check,
 543 };
 544
 545 static void test_migrate(void)
 546 {
 547     TestServer *s = test_server_new("src");
 548     TestServer *dest = test_server_new("dest");
 549     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 550     QTestState *global = global_qtest, *from, *to;
 551     GSource *source;
 552     gchar *cmd;
 553     QDict *rsp;
 554     guint8 *log;
 555     guint64 size;
 556
 557     test_server_listen(s);
 558     test_server_listen(dest);
 559
 560     cmd = GET_QEMU_CMDE(s, 2, "", "");
 561     from = qtest_start(cmd);
 562     g_free(cmd);
 563
 564     wait_for_fds(s);
 565     size = get_log_size(s);
 566     g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 567
 568     cmd = GET_QEMU_CMDE(dest, 2, "", " -incoming %s", uri);
 569     to = qtest_init(cmd);
 570     g_free(cmd);
 571
 572     source = g_source_new(&test_migrate_source_funcs,
 573                           sizeof(TestMigrateSource));
 574     ((TestMigrateSource *)source)->src = s;
 575     ((TestMigrateSource *)source)->dest = dest;
 576     g_source_attach(source, NULL);
 577
 578     /* slow down migration to have time to fiddle with log */
 579     /* TODO: qtest could learn to break on some places */
 580     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 581               "'arguments': { 'value': 10 } }");
 582     g_assert(qdict_haskey(rsp, "return"));
 583     QDECREF(rsp);
 584
 585     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 586                           "'arguments': { 'uri': '%s' } }",
 587                           uri);
 588     rsp = qmp(cmd);
 589     g_free(cmd);
 590     g_assert(qdict_haskey(rsp, "return"));
 591     QDECREF(rsp);
 592
 593     wait_for_log_fd(s);
 594
 595     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 596     g_assert(log != MAP_FAILED);
 597
 598     /* modify first page */
 599     write_guest_mem(s, 0x42);
 600     log[0] = 1;
 601     munmap(log, size);
 602
 603     /* speed things up */
 604     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 605               "'arguments': { 'value': 0 } }");
 606     g_assert(qdict_haskey(rsp, "return"));
 607     QDECREF(rsp);
 608
 609     qmp_eventwait("STOP");
 610
 611     global_qtest = to;
 612     qmp_eventwait("RESUME");
 613
 614     read_guest_mem(dest);
 615
 616     g_source_destroy(source);
 617     g_source_unref(source);
 618
 619     qtest_quit(to);
 620     test_server_free(dest);
 621     qtest_quit(from);
 622     test_server_free(s);
 623     g_free(uri);
 624
 625     global_qtest = global;
 626 }
 627
 628 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 629 static void wait_for_rings_started(TestServer *s, size_t count)
 630 {
 631     gint64 end_time;
 632
 633     g_mutex_lock(&s->data_mutex);
 634     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 635     while (ctpop64(s->rings) != count) {
 636         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 637             /* timeout has passed */
 638             g_assert_cmpint(ctpop64(s->rings), ==, count);
 639             break;
 640         }
 641     }
 642
 643     g_mutex_unlock(&s->data_mutex);
 644 }
 645
 646 static gboolean
 647 reconnect_cb(gpointer user_data)
 648 {
 649     TestServer *s = user_data;
 650
 651     qemu_chr_disconnect(s->chr);
 652
 653     return FALSE;
 654 }
 655
 656 static gpointer
 657 connect_thread(gpointer data)
 658 {
 659     TestServer *s = data;
 660
 661     /* wait for qemu to start before first try, to avoid extra warnings */
 662     g_usleep(G_USEC_PER_SEC);
 663     test_server_connect(s);
 664
 665     return NULL;
 666 }
 667
 668 static void test_reconnect_subprocess(void)
 669 {
 670     TestServer *s = test_server_new("reconnect");
 671     char *cmd;
 672
 673     g_thread_new("connect", connect_thread, s);
 674     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 675     qtest_start(cmd);
 676     g_free(cmd);
 677
 678     wait_for_fds(s);
 679     wait_for_rings_started(s, 2);
 680
 681     /* reconnect */
 682     s->fds_num = 0;
 683     s->rings = 0;
 684     g_idle_add(reconnect_cb, s);
 685     wait_for_fds(s);
 686     wait_for_rings_started(s, 2);
 687
 688     qtest_end();
 689     test_server_free(s);
 690     return;
 691 }
 692
 693 static void test_reconnect(void)
 694 {
 695     gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
 696                                   qtest_get_arch());
 697     g_test_trap_subprocess(path, 0, 0);
 698     g_test_trap_assert_passed();
 699 }
 700 #endif
 701
 702 int main(int argc, char **argv)
 703 {
 704     QTestState *s = NULL;
 705     TestServer *server = NULL;
 706     const char *hugefs;
 707     char *qemu_cmd = NULL;
 708     int ret;
 709     char template[] = "/tmp/vhost-test-XXXXXX";
 710     GMainLoop *loop;
 711     GThread *thread;
 712
 713     g_test_init(&argc, &argv, NULL);
 714
 715     module_call_init(MODULE_INIT_QOM);
 716     qemu_add_opts(&qemu_chardev_opts);
 717
 718     tmpfs = mkdtemp(template);
 719     if (!tmpfs) {
 720         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 721     }
 722     g_assert(tmpfs);
 723
 724     hugefs = getenv("QTEST_HUGETLBFS_PATH");
 725     if (hugefs) {
 726         root = init_hugepagefs(hugefs);
 727         g_assert(root);
 728     } else {
 729         root = tmpfs;
 730     }
 731
 732     server = test_server_new("test");
 733     test_server_listen(server);
 734
 735     loop = g_main_loop_new(NULL, FALSE);
 736     /* run the main loop thread so the chardev may operate */
 737     thread = g_thread_new(NULL, thread_function, loop);
 738
 739     qemu_cmd = GET_QEMU_CMD(server);
 740
 741     s = qtest_start(qemu_cmd);
 742     g_free(qemu_cmd);
 743
 744     qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
 745     qtest_add_func("/vhost-user/migrate", test_migrate);
 746 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 747     qtest_add_func("/vhost-user/reconnect/subprocess",
 748                    test_reconnect_subprocess);
 749     qtest_add_func("/vhost-user/reconnect", test_reconnect);
 750 #endif
 751
 752     ret = g_test_run();
 753
 754     if (s) {
 755         qtest_quit(s);
 756     }
 757
 758     /* cleanup */
 759     test_server_free(server);
 760
 761     /* finish the helper thread and dispatch pending sources */
 762     g_main_loop_quit(loop);
 763     g_thread_join(thread);
 764     while (g_main_context_pending(NULL)) {
 765         g_main_context_iteration (NULL, TRUE);
 766     }
 767     g_main_loop_unref(loop);
 768
 769     ret = rmdir(tmpfs);
 770     if (ret != 0) {
 771         g_test_message("unable to rmdir: path (%s): %s\n",
 772                        tmpfs, strerror(errno));
 773     }
 774     g_assert_cmpint(ret, ==, 0);
 775
 776     return ret;
 777 }