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/mman.h>
  21 #include <sys/vfs.h>
  22 #include <qemu/sockets.h>
  23
  24 /* GLIB version compatibility flags */
  25 #if !GLIB_CHECK_VERSION(2, 26, 0)
  26 #define G_TIME_SPAN_SECOND              (G_GINT64_CONSTANT(1000000))
  27 #endif
  28
  29 #if GLIB_CHECK_VERSION(2, 28, 0)
  30 #define HAVE_MONOTONIC_TIME
  31 #endif
  32
  33 #define QEMU_CMD_ACCEL  " -machine accel=tcg"
  34 #define QEMU_CMD_MEM    " -m %d -object memory-backend-file,id=mem,size=%dM,"\
  35                         "mem-path=%s,share=on -numa node,memdev=mem"
  36 #define QEMU_CMD_CHR    " -chardev socket,id=%s,path=%s%s"
  37 #define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=%s,vhostforce"
  38 #define QEMU_CMD_NET    " -device virtio-net-pci,netdev=net0,romfile=./pc-bios/pxe-virtio.rom"
  39
  40 #define QEMU_CMD        QEMU_CMD_ACCEL QEMU_CMD_MEM QEMU_CMD_CHR \
  41                         QEMU_CMD_NETDEV QEMU_CMD_NET
  42
  43 #define HUGETLBFS_MAGIC       0x958458f6
  44
  45 /*********** FROM hw/virtio/vhost-user.c *************************************/
  46
  47 #define VHOST_MEMORY_MAX_NREGIONS    8
  48
  49 #define VHOST_USER_F_PROTOCOL_FEATURES 30
  50 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  51
  52 #define VHOST_LOG_PAGE 0x1000
  53
  54 typedef enum VhostUserRequest {
  55     VHOST_USER_NONE = 0,
  56     VHOST_USER_GET_FEATURES = 1,
  57     VHOST_USER_SET_FEATURES = 2,
  58     VHOST_USER_SET_OWNER = 3,
  59     VHOST_USER_RESET_OWNER = 4,
  60     VHOST_USER_SET_MEM_TABLE = 5,
  61     VHOST_USER_SET_LOG_BASE = 6,
  62     VHOST_USER_SET_LOG_FD = 7,
  63     VHOST_USER_SET_VRING_NUM = 8,
  64     VHOST_USER_SET_VRING_ADDR = 9,
  65     VHOST_USER_SET_VRING_BASE = 10,
  66     VHOST_USER_GET_VRING_BASE = 11,
  67     VHOST_USER_SET_VRING_KICK = 12,
  68     VHOST_USER_SET_VRING_CALL = 13,
  69     VHOST_USER_SET_VRING_ERR = 14,
  70     VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  71     VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  72     VHOST_USER_SET_VRING_ENABLE = 18,
  73     VHOST_USER_MAX
  74 } VhostUserRequest;
  75
  76 typedef struct VhostUserMemoryRegion {
  77     uint64_t guest_phys_addr;
  78     uint64_t memory_size;
  79     uint64_t userspace_addr;
  80     uint64_t mmap_offset;
  81 } VhostUserMemoryRegion;
  82
  83 typedef struct VhostUserMemory {
  84     uint32_t nregions;
  85     uint32_t padding;
  86     VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  87 } VhostUserMemory;
  88
  89 typedef struct VhostUserLog {
  90     uint64_t mmap_size;
  91     uint64_t mmap_offset;
  92 } VhostUserLog;
  93
  94 typedef struct VhostUserMsg {
  95     VhostUserRequest request;
  96
  97 #define VHOST_USER_VERSION_MASK     (0x3)
  98 #define VHOST_USER_REPLY_MASK       (0x1<<2)
  99     uint32_t flags;
 100     uint32_t size; /* the following payload size */
 101     union {
 102 #define VHOST_USER_VRING_IDX_MASK   (0xff)
 103 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 104         uint64_t u64;
 105         struct vhost_vring_state state;
 106         struct vhost_vring_addr addr;
 107         VhostUserMemory memory;
 108         VhostUserLog log;
 109     } payload;
 110 } QEMU_PACKED VhostUserMsg;
 111
 112 static VhostUserMsg m __attribute__ ((unused));
 113 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
 114                             + sizeof(m.flags) \
 115                             + sizeof(m.size))
 116
 117 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
 118
 119 /* The version of the protocol we support */
 120 #define VHOST_USER_VERSION    (0x1)
 121 /*****************************************************************************/
 122
 123 typedef struct TestServer {
 124     gchar *socket_path;
 125     gchar *mig_path;
 126     gchar *chr_name;
 127     CharDriverState *chr;
 128     int fds_num;
 129     int fds[VHOST_MEMORY_MAX_NREGIONS];
 130     VhostUserMemory memory;
 131     GMutex data_mutex;
 132     GCond data_cond;
 133     int log_fd;
 134     uint64_t rings;
 135 } TestServer;
 136
 137 #if !GLIB_CHECK_VERSION(2, 32, 0)
 138 static gboolean g_cond_wait_until(CompatGCond cond, CompatGMutex mutex,
 139                                   gint64 end_time)
 140 {
 141     gboolean ret = FALSE;
 142     end_time -= g_get_monotonic_time();
 143     GTimeVal time = { end_time / G_TIME_SPAN_SECOND,
 144                       end_time % G_TIME_SPAN_SECOND };
 145     ret = g_cond_timed_wait(cond, mutex, &time);
 146     return ret;
 147 }
 148 #endif
 149
 150 static const char *tmpfs;
 151 static const char *root;
 152
 153 static void wait_for_fds(TestServer *s)
 154 {
 155     gint64 end_time;
 156
 157     g_mutex_lock(&s->data_mutex);
 158
 159     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 160     while (!s->fds_num) {
 161         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 162             /* timeout has passed */
 163             g_assert(s->fds_num);
 164             break;
 165         }
 166     }
 167
 168     /* check for sanity */
 169     g_assert_cmpint(s->fds_num, >, 0);
 170     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 171
 172     g_mutex_unlock(&s->data_mutex);
 173 }
 174
 175 static void read_guest_mem(const void *data)
 176 {
 177     TestServer *s = (void *)data;
 178     uint32_t *guest_mem;
 179     int i, j;
 180     size_t size;
 181
 182     wait_for_fds(s);
 183
 184     g_mutex_lock(&s->data_mutex);
 185
 186     /* iterate all regions */
 187     for (i = 0; i < s->fds_num; i++) {
 188
 189         /* We'll check only the region statring at 0x0*/
 190         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 191             continue;
 192         }
 193
 194         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 195
 196         size = s->memory.regions[i].memory_size +
 197             s->memory.regions[i].mmap_offset;
 198
 199         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 200                          MAP_SHARED, s->fds[i], 0);
 201
 202         g_assert(guest_mem != MAP_FAILED);
 203         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 204
 205         for (j = 0; j < 256; j++) {
 206             uint32_t a = readl(s->memory.regions[i].guest_phys_addr + j*4);
 207             uint32_t b = guest_mem[j];
 208
 209             g_assert_cmpint(a, ==, b);
 210         }
 211
 212         munmap(guest_mem, s->memory.regions[i].memory_size);
 213     }
 214
 215     g_mutex_unlock(&s->data_mutex);
 216 }
 217
 218 static void *thread_function(void *data)
 219 {
 220     GMainLoop *loop = data;
 221     g_main_loop_run(loop);
 222     return NULL;
 223 }
 224
 225 static int chr_can_read(void *opaque)
 226 {
 227     return VHOST_USER_HDR_SIZE;
 228 }
 229
 230 static void chr_read(void *opaque, const uint8_t *buf, int size)
 231 {
 232     TestServer *s = opaque;
 233     CharDriverState *chr = s->chr;
 234     VhostUserMsg msg;
 235     uint8_t *p = (uint8_t *) &msg;
 236     int fd;
 237
 238     if (size != VHOST_USER_HDR_SIZE) {
 239         g_test_message("Wrong message size received %d\n", size);
 240         return;
 241     }
 242
 243     g_mutex_lock(&s->data_mutex);
 244     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 245
 246     if (msg.size) {
 247         p += VHOST_USER_HDR_SIZE;
 248         size = qemu_chr_fe_read_all(chr, p, msg.size);
 249         if (size != msg.size) {
 250             g_test_message("Wrong message size received %d != %d\n",
 251                            size, msg.size);
 252             return;
 253         }
 254     }
 255
 256     switch (msg.request) {
 257     case VHOST_USER_GET_FEATURES:
 258         /* send back features to qemu */
 259         msg.flags |= VHOST_USER_REPLY_MASK;
 260         msg.size = sizeof(m.payload.u64);
 261         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 262             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 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_SET_FEATURES:
 268         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 269                         !=, 0ULL);
 270         break;
 271
 272     case VHOST_USER_GET_PROTOCOL_FEATURES:
 273         /* send back features to qemu */
 274         msg.flags |= VHOST_USER_REPLY_MASK;
 275         msg.size = sizeof(m.payload.u64);
 276         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 277         p = (uint8_t *) &msg;
 278         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 279         break;
 280
 281     case VHOST_USER_GET_VRING_BASE:
 282         /* send back vring base to qemu */
 283         msg.flags |= VHOST_USER_REPLY_MASK;
 284         msg.size = sizeof(m.payload.state);
 285         msg.payload.state.num = 0;
 286         p = (uint8_t *) &msg;
 287         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 288
 289         assert(msg.payload.state.index < 2);
 290         s->rings &= ~(0x1ULL << msg.payload.state.index);
 291         break;
 292
 293     case VHOST_USER_SET_MEM_TABLE:
 294         /* received the mem table */
 295         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 296         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds, G_N_ELEMENTS(s->fds));
 297
 298         /* signal the test that it can continue */
 299         g_cond_signal(&s->data_cond);
 300         break;
 301
 302     case VHOST_USER_SET_VRING_KICK:
 303     case VHOST_USER_SET_VRING_CALL:
 304         /* consume the fd */
 305         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 306         /*
 307          * This is a non-blocking eventfd.
 308          * The receive function forces it to be blocking,
 309          * so revert it back to non-blocking.
 310          */
 311         qemu_set_nonblock(fd);
 312         break;
 313
 314     case VHOST_USER_SET_LOG_BASE:
 315         if (s->log_fd != -1) {
 316             close(s->log_fd);
 317             s->log_fd = -1;
 318         }
 319         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 320         msg.flags |= VHOST_USER_REPLY_MASK;
 321         msg.size = 0;
 322         p = (uint8_t *) &msg;
 323         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 324
 325         g_cond_signal(&s->data_cond);
 326         break;
 327
 328     case VHOST_USER_SET_VRING_BASE:
 329         assert(msg.payload.state.index < 2);
 330         s->rings |= 0x1ULL << msg.payload.state.index;
 331         break;
 332
 333     default:
 334         break;
 335     }
 336
 337     g_mutex_unlock(&s->data_mutex);
 338 }
 339
 340 static const char *init_hugepagefs(const char *path)
 341 {
 342     struct statfs fs;
 343     int ret;
 344
 345     if (access(path, R_OK | W_OK | X_OK)) {
 346         g_test_message("access on path (%s): %s\n", path, strerror(errno));
 347         return NULL;
 348     }
 349
 350     do {
 351         ret = statfs(path, &fs);
 352     } while (ret != 0 && errno == EINTR);
 353
 354     if (ret != 0) {
 355         g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
 356         return NULL;
 357     }
 358
 359     if (fs.f_type != HUGETLBFS_MAGIC) {
 360         g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
 361         return NULL;
 362     }
 363
 364     return path;
 365 }
 366
 367 static TestServer *test_server_new(const gchar *name)
 368 {
 369     TestServer *server = g_new0(TestServer, 1);
 370
 371     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 372     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 373     server->chr_name = g_strdup_printf("chr-%s", name);
 374
 375     g_mutex_init(&server->data_mutex);
 376     g_cond_init(&server->data_cond);
 377
 378     server->log_fd = -1;
 379
 380     return server;
 381 }
 382
 383 static void test_server_create_chr(TestServer *server, const gchar *opt)
 384 {
 385     gchar *chr_path;
 386
 387     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 388     server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
 389     g_free(chr_path);
 390
 391     qemu_chr_add_handlers(server->chr, chr_can_read, chr_read, NULL, server);
 392 }
 393
 394 static void test_server_listen(TestServer *server)
 395 {
 396     test_server_create_chr(server, ",server,nowait");
 397 }
 398
 399 static inline void test_server_connect(TestServer *server)
 400 {
 401     test_server_create_chr(server, ",reconnect=1");
 402 }
 403
 404 #define GET_QEMU_CMD(s)                                         \
 405     g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name,  \
 406                     (s)->socket_path, "", (s)->chr_name)
 407
 408 #define GET_QEMU_CMDE(s, mem, chr_opts, extra, ...)                     \
 409     g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
 410                     (s)->socket_path, (chr_opts), (s)->chr_name, ##__VA_ARGS__)
 411
 412 static gboolean _test_server_free(TestServer *server)
 413 {
 414     int i;
 415
 416     qemu_chr_delete(server->chr);
 417
 418     for (i = 0; i < server->fds_num; i++) {
 419         close(server->fds[i]);
 420     }
 421
 422     if (server->log_fd != -1) {
 423         close(server->log_fd);
 424     }
 425
 426     unlink(server->socket_path);
 427     g_free(server->socket_path);
 428
 429     unlink(server->mig_path);
 430     g_free(server->mig_path);
 431
 432     g_free(server->chr_name);
 433     g_free(server);
 434
 435     return FALSE;
 436 }
 437
 438 static void test_server_free(TestServer *server)
 439 {
 440     g_idle_add((GSourceFunc)_test_server_free, server);
 441 }
 442
 443 static void wait_for_log_fd(TestServer *s)
 444 {
 445     gint64 end_time;
 446
 447     g_mutex_lock(&s->data_mutex);
 448     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 449     while (s->log_fd == -1) {
 450         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 451             /* timeout has passed */
 452             g_assert(s->log_fd != -1);
 453             break;
 454         }
 455     }
 456
 457     g_mutex_unlock(&s->data_mutex);
 458 }
 459
 460 static void write_guest_mem(TestServer *s, uint32_t seed)
 461 {
 462     uint32_t *guest_mem;
 463     int i, j;
 464     size_t size;
 465
 466     wait_for_fds(s);
 467
 468     /* iterate all regions */
 469     for (i = 0; i < s->fds_num; i++) {
 470
 471         /* We'll write only the region statring at 0x0 */
 472         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 473             continue;
 474         }
 475
 476         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 477
 478         size = s->memory.regions[i].memory_size +
 479             s->memory.regions[i].mmap_offset;
 480
 481         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 482                          MAP_SHARED, s->fds[i], 0);
 483
 484         g_assert(guest_mem != MAP_FAILED);
 485         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 486
 487         for (j = 0; j < 256; j++) {
 488             guest_mem[j] = seed + j;
 489         }
 490
 491         munmap(guest_mem, s->memory.regions[i].memory_size);
 492         break;
 493     }
 494 }
 495
 496 static guint64 get_log_size(TestServer *s)
 497 {
 498     guint64 log_size = 0;
 499     int i;
 500
 501     for (i = 0; i < s->memory.nregions; ++i) {
 502         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 503         guint64 last = range_get_last(reg->guest_phys_addr,
 504                                        reg->memory_size);
 505         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 506     }
 507
 508     return log_size;
 509 }
 510
 511 typedef struct TestMigrateSource {
 512     GSource source;
 513     TestServer *src;
 514     TestServer *dest;
 515 } TestMigrateSource;
 516
 517 static gboolean
 518 test_migrate_source_check(GSource *source)
 519 {
 520     TestMigrateSource *t = (TestMigrateSource *)source;
 521     gboolean overlap = t->src->rings && t->dest->rings;
 522
 523     g_assert(!overlap);
 524
 525     return FALSE;
 526 }
 527
 528 #if !GLIB_CHECK_VERSION(2,36,0)
 529 /* this callback is unnecessary with glib >2.36, the default
 530  * prepare for the source does the same */
 531 static gboolean
 532 test_migrate_source_prepare(GSource *source, gint *timeout)
 533 {
 534     *timeout = -1;
 535     return FALSE;
 536 }
 537 #endif
 538
 539 GSourceFuncs test_migrate_source_funcs = {
 540 #if !GLIB_CHECK_VERSION(2,36,0)
 541     .prepare = test_migrate_source_prepare,
 542 #endif
 543     .check = test_migrate_source_check,
 544 };
 545
 546 static void test_migrate(void)
 547 {
 548     TestServer *s = test_server_new("src");
 549     TestServer *dest = test_server_new("dest");
 550     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 551     QTestState *global = global_qtest, *from, *to;
 552     GSource *source;
 553     gchar *cmd;
 554     QDict *rsp;
 555     guint8 *log;
 556     guint64 size;
 557
 558     test_server_listen(s);
 559     test_server_listen(dest);
 560
 561     cmd = GET_QEMU_CMDE(s, 2, "", "");
 562     from = qtest_start(cmd);
 563     g_free(cmd);
 564
 565     wait_for_fds(s);
 566     size = get_log_size(s);
 567     g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 568
 569     cmd = GET_QEMU_CMDE(dest, 2, "", " -incoming %s", uri);
 570     to = qtest_init(cmd);
 571     g_free(cmd);
 572
 573     source = g_source_new(&test_migrate_source_funcs,
 574                           sizeof(TestMigrateSource));
 575     ((TestMigrateSource *)source)->src = s;
 576     ((TestMigrateSource *)source)->dest = dest;
 577     g_source_attach(source, NULL);
 578
 579     /* slow down migration to have time to fiddle with log */
 580     /* TODO: qtest could learn to break on some places */
 581     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 582               "'arguments': { 'value': 10 } }");
 583     g_assert(qdict_haskey(rsp, "return"));
 584     QDECREF(rsp);
 585
 586     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 587                           "'arguments': { 'uri': '%s' } }",
 588                           uri);
 589     rsp = qmp(cmd);
 590     g_free(cmd);
 591     g_assert(qdict_haskey(rsp, "return"));
 592     QDECREF(rsp);
 593
 594     wait_for_log_fd(s);
 595
 596     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 597     g_assert(log != MAP_FAILED);
 598
 599     /* modify first page */
 600     write_guest_mem(s, 0x42);
 601     log[0] = 1;
 602     munmap(log, size);
 603
 604     /* speed things up */
 605     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 606               "'arguments': { 'value': 0 } }");
 607     g_assert(qdict_haskey(rsp, "return"));
 608     QDECREF(rsp);
 609
 610     qmp_eventwait("STOP");
 611
 612     global_qtest = to;
 613     qmp_eventwait("RESUME");
 614
 615     read_guest_mem(dest);
 616
 617     g_source_destroy(source);
 618     g_source_unref(source);
 619
 620     qtest_quit(to);
 621     test_server_free(dest);
 622     qtest_quit(from);
 623     test_server_free(s);
 624     g_free(uri);
 625
 626     global_qtest = global;
 627 }
 628
 629 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 630 static void wait_for_rings_started(TestServer *s, size_t count)
 631 {
 632     gint64 end_time;
 633
 634     g_mutex_lock(&s->data_mutex);
 635     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 636     while (ctpop64(s->rings) != count) {
 637         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 638             /* timeout has passed */
 639             g_assert_cmpint(ctpop64(s->rings), ==, count);
 640             break;
 641         }
 642     }
 643
 644     g_mutex_unlock(&s->data_mutex);
 645 }
 646
 647 static gboolean
 648 reconnect_cb(gpointer user_data)
 649 {
 650     TestServer *s = user_data;
 651
 652     qemu_chr_disconnect(s->chr);
 653
 654     return FALSE;
 655 }
 656
 657 static gpointer
 658 connect_thread(gpointer data)
 659 {
 660     TestServer *s = data;
 661
 662     /* wait for qemu to start before first try, to avoid extra warnings */
 663     g_usleep(G_USEC_PER_SEC);
 664     test_server_connect(s);
 665
 666     return NULL;
 667 }
 668
 669 static void test_reconnect_subprocess(void)
 670 {
 671     TestServer *s = test_server_new("reconnect");
 672     char *cmd;
 673
 674     g_thread_new("connect", connect_thread, s);
 675     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 676     qtest_start(cmd);
 677     g_free(cmd);
 678
 679     wait_for_fds(s);
 680     wait_for_rings_started(s, 2);
 681
 682     /* reconnect */
 683     s->fds_num = 0;
 684     s->rings = 0;
 685     g_idle_add(reconnect_cb, s);
 686     wait_for_fds(s);
 687     wait_for_rings_started(s, 2);
 688
 689     qtest_end();
 690     test_server_free(s);
 691     return;
 692 }
 693
 694 static void test_reconnect(void)
 695 {
 696     gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
 697                                   qtest_get_arch());
 698     g_test_trap_subprocess(path, 0, 0);
 699     g_test_trap_assert_passed();
 700 }
 701 #endif
 702
 703 int main(int argc, char **argv)
 704 {
 705     QTestState *s = NULL;
 706     TestServer *server = NULL;
 707     const char *hugefs;
 708     char *qemu_cmd = NULL;
 709     int ret;
 710     char template[] = "/tmp/vhost-test-XXXXXX";
 711     GMainLoop *loop;
 712     GThread *thread;
 713
 714     g_test_init(&argc, &argv, NULL);
 715
 716     module_call_init(MODULE_INIT_QOM);
 717     qemu_add_opts(&qemu_chardev_opts);
 718
 719     tmpfs = mkdtemp(template);
 720     if (!tmpfs) {
 721         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 722     }
 723     g_assert(tmpfs);
 724
 725     hugefs = getenv("QTEST_HUGETLBFS_PATH");
 726     if (hugefs) {
 727         root = init_hugepagefs(hugefs);
 728         g_assert(root);
 729     } else {
 730         root = tmpfs;
 731     }
 732
 733     server = test_server_new("test");
 734     test_server_listen(server);
 735
 736     loop = g_main_loop_new(NULL, FALSE);
 737     /* run the main loop thread so the chardev may operate */
 738     thread = g_thread_new(NULL, thread_function, loop);
 739
 740     qemu_cmd = GET_QEMU_CMD(server);
 741
 742     s = qtest_start(qemu_cmd);
 743     g_free(qemu_cmd);
 744
 745     qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
 746     qtest_add_func("/vhost-user/migrate", test_migrate);
 747 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 748     qtest_add_func("/vhost-user/reconnect/subprocess",
 749                    test_reconnect_subprocess);
 750     qtest_add_func("/vhost-user/reconnect", test_reconnect);
 751 #endif
 752
 753     ret = g_test_run();
 754
 755     if (s) {
 756         qtest_quit(s);
 757     }
 758
 759     /* cleanup */
 760     test_server_free(server);
 761
 762     /* finish the helper thread and dispatch pending sources */
 763     g_main_loop_quit(loop);
 764     g_thread_join(thread);
 765     while (g_main_context_pending(NULL)) {
 766         g_main_context_iteration (NULL, TRUE);
 767     }
 768     g_main_loop_unref(loop);
 769
 770     ret = rmdir(tmpfs);
 771     if (ret != 0) {
 772         g_test_message("unable to rmdir: path (%s): %s\n",
 773                        tmpfs, strerror(errno));
 774     }
 775     g_assert_cmpint(ret, ==, 0);
 776
 777     return ret;
 778 }