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"
  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         g_assert_cmpint(qemu_chr_fe_read_all(chr, p, msg.size), ==, msg.size);
 248     }
 249
 250     switch (msg.request) {
 251     case VHOST_USER_GET_FEATURES:
 252         /* send back features to qemu */
 253         msg.flags |= VHOST_USER_REPLY_MASK;
 254         msg.size = sizeof(m.payload.u64);
 255         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 256             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 257         p = (uint8_t *) &msg;
 258         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 259         break;
 260
 261     case VHOST_USER_SET_FEATURES:
 262         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 263                         !=, 0ULL);
 264         break;
 265
 266     case VHOST_USER_GET_PROTOCOL_FEATURES:
 267         /* send back features to qemu */
 268         msg.flags |= VHOST_USER_REPLY_MASK;
 269         msg.size = sizeof(m.payload.u64);
 270         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 271         p = (uint8_t *) &msg;
 272         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 273         break;
 274
 275     case VHOST_USER_GET_VRING_BASE:
 276         /* send back vring base to qemu */
 277         msg.flags |= VHOST_USER_REPLY_MASK;
 278         msg.size = sizeof(m.payload.state);
 279         msg.payload.state.num = 0;
 280         p = (uint8_t *) &msg;
 281         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 282
 283         assert(msg.payload.state.index < 2);
 284         s->rings &= ~(0x1ULL << msg.payload.state.index);
 285         break;
 286
 287     case VHOST_USER_SET_MEM_TABLE:
 288         /* received the mem table */
 289         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 290         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds, G_N_ELEMENTS(s->fds));
 291
 292         /* signal the test that it can continue */
 293         g_cond_signal(&s->data_cond);
 294         break;
 295
 296     case VHOST_USER_SET_VRING_KICK:
 297     case VHOST_USER_SET_VRING_CALL:
 298         /* consume the fd */
 299         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 300         /*
 301          * This is a non-blocking eventfd.
 302          * The receive function forces it to be blocking,
 303          * so revert it back to non-blocking.
 304          */
 305         qemu_set_nonblock(fd);
 306         break;
 307
 308     case VHOST_USER_SET_LOG_BASE:
 309         if (s->log_fd != -1) {
 310             close(s->log_fd);
 311             s->log_fd = -1;
 312         }
 313         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 314         msg.flags |= VHOST_USER_REPLY_MASK;
 315         msg.size = 0;
 316         p = (uint8_t *) &msg;
 317         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 318
 319         g_cond_signal(&s->data_cond);
 320         break;
 321
 322     case VHOST_USER_SET_VRING_BASE:
 323         assert(msg.payload.state.index < 2);
 324         s->rings |= 0x1ULL << msg.payload.state.index;
 325         break;
 326
 327     default:
 328         break;
 329     }
 330
 331     g_mutex_unlock(&s->data_mutex);
 332 }
 333
 334 static const char *init_hugepagefs(const char *path)
 335 {
 336     struct statfs fs;
 337     int ret;
 338
 339     if (access(path, R_OK | W_OK | X_OK)) {
 340         g_test_message("access on path (%s): %s\n", path, strerror(errno));
 341         return NULL;
 342     }
 343
 344     do {
 345         ret = statfs(path, &fs);
 346     } while (ret != 0 && errno == EINTR);
 347
 348     if (ret != 0) {
 349         g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
 350         return NULL;
 351     }
 352
 353     if (fs.f_type != HUGETLBFS_MAGIC) {
 354         g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
 355         return NULL;
 356     }
 357
 358     return path;
 359 }
 360
 361 static TestServer *test_server_new(const gchar *name)
 362 {
 363     TestServer *server = g_new0(TestServer, 1);
 364     gchar *chr_path;
 365
 366     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 367     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 368
 369     chr_path = g_strdup_printf("unix:%s,server,nowait", server->socket_path);
 370     server->chr_name = g_strdup_printf("chr-%s", name);
 371     server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
 372     g_free(chr_path);
 373
 374     qemu_chr_add_handlers(server->chr, chr_can_read, chr_read, NULL, server);
 375
 376     g_mutex_init(&server->data_mutex);
 377     g_cond_init(&server->data_cond);
 378
 379     server->log_fd = -1;
 380
 381     return server;
 382 }
 383
 384 #define GET_QEMU_CMD(s)                                                        \
 385     g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name,                 \
 386                     (s)->socket_path, (s)->chr_name)
 387
 388 #define GET_QEMU_CMDE(s, mem, extra, ...)                                      \
 389     g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name,       \
 390                     (s)->socket_path, (s)->chr_name, ##__VA_ARGS__)
 391
 392 static gboolean _test_server_free(TestServer *server)
 393 {
 394     int i;
 395
 396     qemu_chr_delete(server->chr);
 397
 398     for (i = 0; i < server->fds_num; i++) {
 399         close(server->fds[i]);
 400     }
 401
 402     if (server->log_fd != -1) {
 403         close(server->log_fd);
 404     }
 405
 406     unlink(server->socket_path);
 407     g_free(server->socket_path);
 408
 409     unlink(server->mig_path);
 410     g_free(server->mig_path);
 411
 412     g_free(server->chr_name);
 413     g_free(server);
 414
 415     return FALSE;
 416 }
 417
 418 static void test_server_free(TestServer *server)
 419 {
 420     g_idle_add((GSourceFunc)_test_server_free, server);
 421 }
 422
 423 static void wait_for_log_fd(TestServer *s)
 424 {
 425     gint64 end_time;
 426
 427     g_mutex_lock(&s->data_mutex);
 428     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 429     while (s->log_fd == -1) {
 430         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 431             /* timeout has passed */
 432             g_assert(s->log_fd != -1);
 433             break;
 434         }
 435     }
 436
 437     g_mutex_unlock(&s->data_mutex);
 438 }
 439
 440 static void write_guest_mem(TestServer *s, uint32_t seed)
 441 {
 442     uint32_t *guest_mem;
 443     int i, j;
 444     size_t size;
 445
 446     wait_for_fds(s);
 447
 448     /* iterate all regions */
 449     for (i = 0; i < s->fds_num; i++) {
 450
 451         /* We'll write only the region statring at 0x0 */
 452         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 453             continue;
 454         }
 455
 456         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 457
 458         size = s->memory.regions[i].memory_size +
 459             s->memory.regions[i].mmap_offset;
 460
 461         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 462                          MAP_SHARED, s->fds[i], 0);
 463
 464         g_assert(guest_mem != MAP_FAILED);
 465         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 466
 467         for (j = 0; j < 256; j++) {
 468             guest_mem[j] = seed + j;
 469         }
 470
 471         munmap(guest_mem, s->memory.regions[i].memory_size);
 472         break;
 473     }
 474 }
 475
 476 static guint64 get_log_size(TestServer *s)
 477 {
 478     guint64 log_size = 0;
 479     int i;
 480
 481     for (i = 0; i < s->memory.nregions; ++i) {
 482         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 483         guint64 last = range_get_last(reg->guest_phys_addr,
 484                                        reg->memory_size);
 485         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 486     }
 487
 488     return log_size;
 489 }
 490
 491 typedef struct TestMigrateSource {
 492     GSource source;
 493     TestServer *src;
 494     TestServer *dest;
 495 } TestMigrateSource;
 496
 497 static gboolean
 498 test_migrate_source_check(GSource *source)
 499 {
 500     TestMigrateSource *t = (TestMigrateSource *)source;
 501     gboolean overlap = t->src->rings && t->dest->rings;
 502
 503     g_assert(!overlap);
 504
 505     return FALSE;
 506 }
 507
 508 #if !GLIB_CHECK_VERSION(2,36,0)
 509 /* this callback is unnecessary with glib >2.36, the default
 510  * prepare for the source does the same */
 511 static gboolean
 512 test_migrate_source_prepare(GSource *source, gint *timeout)
 513 {
 514     *timeout = -1;
 515     return FALSE;
 516 }
 517 #endif
 518
 519 GSourceFuncs test_migrate_source_funcs = {
 520 #if !GLIB_CHECK_VERSION(2,36,0)
 521     .prepare = test_migrate_source_prepare,
 522 #endif
 523     .check = test_migrate_source_check,
 524 };
 525
 526 static void test_migrate(void)
 527 {
 528     TestServer *s = test_server_new("src");
 529     TestServer *dest = test_server_new("dest");
 530     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 531     QTestState *global = global_qtest, *from, *to;
 532     GSource *source;
 533     gchar *cmd;
 534     QDict *rsp;
 535     guint8 *log;
 536     guint64 size;
 537
 538     cmd = GET_QEMU_CMDE(s, 2, "");
 539     from = qtest_start(cmd);
 540     g_free(cmd);
 541
 542     wait_for_fds(s);
 543     size = get_log_size(s);
 544     g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 545
 546     cmd = GET_QEMU_CMDE(dest, 2, " -incoming %s", uri);
 547     to = qtest_init(cmd);
 548     g_free(cmd);
 549
 550     source = g_source_new(&test_migrate_source_funcs,
 551                           sizeof(TestMigrateSource));
 552     ((TestMigrateSource *)source)->src = s;
 553     ((TestMigrateSource *)source)->dest = dest;
 554     g_source_attach(source, NULL);
 555
 556     /* slow down migration to have time to fiddle with log */
 557     /* TODO: qtest could learn to break on some places */
 558     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 559               "'arguments': { 'value': 10 } }");
 560     g_assert(qdict_haskey(rsp, "return"));
 561     QDECREF(rsp);
 562
 563     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 564                           "'arguments': { 'uri': '%s' } }",
 565                           uri);
 566     rsp = qmp(cmd);
 567     g_free(cmd);
 568     g_assert(qdict_haskey(rsp, "return"));
 569     QDECREF(rsp);
 570
 571     wait_for_log_fd(s);
 572
 573     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 574     g_assert(log != MAP_FAILED);
 575
 576     /* modify first page */
 577     write_guest_mem(s, 0x42);
 578     log[0] = 1;
 579     munmap(log, size);
 580
 581     /* speed things up */
 582     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 583               "'arguments': { 'value': 0 } }");
 584     g_assert(qdict_haskey(rsp, "return"));
 585     QDECREF(rsp);
 586
 587     qmp_eventwait("STOP");
 588
 589     global_qtest = to;
 590     qmp_eventwait("RESUME");
 591
 592     read_guest_mem(dest);
 593
 594     g_source_destroy(source);
 595     g_source_unref(source);
 596
 597     qtest_quit(to);
 598     test_server_free(dest);
 599     qtest_quit(from);
 600     test_server_free(s);
 601     g_free(uri);
 602
 603     global_qtest = global;
 604 }
 605
 606 int main(int argc, char **argv)
 607 {
 608     QTestState *s = NULL;
 609     TestServer *server = NULL;
 610     const char *hugefs;
 611     char *qemu_cmd = NULL;
 612     int ret;
 613     char template[] = "/tmp/vhost-test-XXXXXX";
 614     GMainLoop *loop;
 615     GThread *thread;
 616
 617     g_test_init(&argc, &argv, NULL);
 618
 619     module_call_init(MODULE_INIT_QOM);
 620     qemu_add_opts(&qemu_chardev_opts);
 621
 622     tmpfs = mkdtemp(template);
 623     if (!tmpfs) {
 624         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 625     }
 626     g_assert(tmpfs);
 627
 628     hugefs = getenv("QTEST_HUGETLBFS_PATH");
 629     if (hugefs) {
 630         root = init_hugepagefs(hugefs);
 631         g_assert(root);
 632     } else {
 633         root = tmpfs;
 634     }
 635
 636     server = test_server_new("test");
 637
 638     loop = g_main_loop_new(NULL, FALSE);
 639     /* run the main loop thread so the chardev may operate */
 640     thread = g_thread_new(NULL, thread_function, loop);
 641
 642     qemu_cmd = GET_QEMU_CMD(server);
 643
 644     s = qtest_start(qemu_cmd);
 645     g_free(qemu_cmd);
 646
 647     qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
 648     qtest_add_func("/vhost-user/migrate", test_migrate);
 649
 650     ret = g_test_run();
 651
 652     if (s) {
 653         qtest_quit(s);
 654     }
 655
 656     /* cleanup */
 657     test_server_free(server);
 658
 659     /* finish the helper thread and dispatch pending sources */
 660     g_main_loop_quit(loop);
 661     g_thread_join(thread);
 662     while (g_main_context_pending(NULL)) {
 663         g_main_context_iteration (NULL, TRUE);
 664     }
 665     g_main_loop_unref(loop);
 666
 667     ret = rmdir(tmpfs);
 668     if (ret != 0) {
 669         g_test_message("unable to rmdir: path (%s): %s\n",
 670                        tmpfs, strerror(errno));
 671     }
 672     g_assert_cmpint(ret, ==, 0);
 673
 674     return ret;
 675 }