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 "qapi/error.h"
  15 #include "qemu/option.h"
  16 #include "qemu/range.h"
  17 #include "qemu/sockets.h"
  18 #include "sysemu/char.h"
  19 #include "sysemu/sysemu.h"
  20 #include "libqos/libqos.h"
  21 #include "libqos/pci-pc.h"
  22 #include "libqos/virtio-pci.h"
  23 #include "qapi/error.h"
  24
  25 #include "libqos/malloc-pc.h"
  26 #include "hw/virtio/virtio-net.h"
  27
  28 #include <linux/vhost.h>
  29 #include <linux/virtio_ids.h>
  30 #include <linux/virtio_net.h>
  31 #include <sys/vfs.h>
  32
  33 /* GLIB version compatibility flags */
  34 #if !GLIB_CHECK_VERSION(2, 26, 0)
  35 #define G_TIME_SPAN_SECOND              (G_GINT64_CONSTANT(1000000))
  36 #endif
  37
  38 #if GLIB_CHECK_VERSION(2, 28, 0)
  39 #define HAVE_MONOTONIC_TIME
  40 #endif
  41
  42 #define QEMU_CMD_MEM    " -m %d -object memory-backend-file,id=mem,size=%dM,"\
  43                         "mem-path=%s,share=on -numa node,memdev=mem"
  44 #define QEMU_CMD_CHR    " -chardev socket,id=%s,path=%s%s"
  45 #define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=%s,vhostforce"
  46 #define QEMU_CMD_NET    " -device virtio-net-pci,netdev=net0"
  47
  48 #define QEMU_CMD        QEMU_CMD_MEM QEMU_CMD_CHR \
  49                         QEMU_CMD_NETDEV QEMU_CMD_NET
  50
  51 #define HUGETLBFS_MAGIC       0x958458f6
  52
  53 /*********** FROM hw/virtio/vhost-user.c *************************************/
  54
  55 #define VHOST_MEMORY_MAX_NREGIONS    8
  56
  57 #define VHOST_USER_F_PROTOCOL_FEATURES 30
  58 #define VHOST_USER_PROTOCOL_F_MQ 0
  59 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  60
  61 #define VHOST_LOG_PAGE 0x1000
  62
  63 typedef enum VhostUserRequest {
  64     VHOST_USER_NONE = 0,
  65     VHOST_USER_GET_FEATURES = 1,
  66     VHOST_USER_SET_FEATURES = 2,
  67     VHOST_USER_SET_OWNER = 3,
  68     VHOST_USER_RESET_OWNER = 4,
  69     VHOST_USER_SET_MEM_TABLE = 5,
  70     VHOST_USER_SET_LOG_BASE = 6,
  71     VHOST_USER_SET_LOG_FD = 7,
  72     VHOST_USER_SET_VRING_NUM = 8,
  73     VHOST_USER_SET_VRING_ADDR = 9,
  74     VHOST_USER_SET_VRING_BASE = 10,
  75     VHOST_USER_GET_VRING_BASE = 11,
  76     VHOST_USER_SET_VRING_KICK = 12,
  77     VHOST_USER_SET_VRING_CALL = 13,
  78     VHOST_USER_SET_VRING_ERR = 14,
  79     VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  80     VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  81     VHOST_USER_GET_QUEUE_NUM = 17,
  82     VHOST_USER_SET_VRING_ENABLE = 18,
  83     VHOST_USER_MAX
  84 } VhostUserRequest;
  85
  86 typedef struct VhostUserMemoryRegion {
  87     uint64_t guest_phys_addr;
  88     uint64_t memory_size;
  89     uint64_t userspace_addr;
  90     uint64_t mmap_offset;
  91 } VhostUserMemoryRegion;
  92
  93 typedef struct VhostUserMemory {
  94     uint32_t nregions;
  95     uint32_t padding;
  96     VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  97 } VhostUserMemory;
  98
  99 typedef struct VhostUserLog {
 100     uint64_t mmap_size;
 101     uint64_t mmap_offset;
 102 } VhostUserLog;
 103
 104 typedef struct VhostUserMsg {
 105     VhostUserRequest request;
 106
 107 #define VHOST_USER_VERSION_MASK     (0x3)
 108 #define VHOST_USER_REPLY_MASK       (0x1<<2)
 109     uint32_t flags;
 110     uint32_t size; /* the following payload size */
 111     union {
 112 #define VHOST_USER_VRING_IDX_MASK   (0xff)
 113 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 114         uint64_t u64;
 115         struct vhost_vring_state state;
 116         struct vhost_vring_addr addr;
 117         VhostUserMemory memory;
 118         VhostUserLog log;
 119     } payload;
 120 } QEMU_PACKED VhostUserMsg;
 121
 122 static VhostUserMsg m __attribute__ ((unused));
 123 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
 124                             + sizeof(m.flags) \
 125                             + sizeof(m.size))
 126
 127 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
 128
 129 /* The version of the protocol we support */
 130 #define VHOST_USER_VERSION    (0x1)
 131 /*****************************************************************************/
 132
 133 enum {
 134     TEST_FLAGS_OK,
 135     TEST_FLAGS_DISCONNECT,
 136     TEST_FLAGS_BAD,
 137     TEST_FLAGS_END,
 138 };
 139
 140 typedef struct TestServer {
 141     gchar *socket_path;
 142     gchar *mig_path;
 143     gchar *chr_name;
 144     CharBackend chr;
 145     int fds_num;
 146     int fds[VHOST_MEMORY_MAX_NREGIONS];
 147     VhostUserMemory memory;
 148     CompatGMutex data_mutex;
 149     CompatGCond data_cond;
 150     int log_fd;
 151     uint64_t rings;
 152     bool test_fail;
 153     int test_flags;
 154     int queues;
 155 } TestServer;
 156
 157 static const char *tmpfs;
 158 static const char *root;
 159
 160 static void init_virtio_dev(TestServer *s)
 161 {
 162     QPCIBus *bus;
 163     QVirtioPCIDevice *dev;
 164     uint32_t features;
 165
 166     bus = qpci_init_pc(NULL);
 167     g_assert_nonnull(bus);
 168
 169     dev = qvirtio_pci_device_find(bus, VIRTIO_ID_NET);
 170     g_assert_nonnull(dev);
 171
 172     qvirtio_pci_device_enable(dev);
 173     qvirtio_reset(&dev->vdev);
 174     qvirtio_set_acknowledge(&dev->vdev);
 175     qvirtio_set_driver(&dev->vdev);
 176
 177     features = qvirtio_get_features(&dev->vdev);
 178     features = features & VIRTIO_NET_F_MAC;
 179     qvirtio_set_features(&dev->vdev, features);
 180
 181     qvirtio_set_driver_ok(&dev->vdev);
 182 }
 183
 184 static void wait_for_fds(TestServer *s)
 185 {
 186     gint64 end_time;
 187
 188     g_mutex_lock(&s->data_mutex);
 189
 190     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 191     while (!s->fds_num) {
 192         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 193             /* timeout has passed */
 194             g_assert(s->fds_num);
 195             break;
 196         }
 197     }
 198
 199     /* check for sanity */
 200     g_assert_cmpint(s->fds_num, >, 0);
 201     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 202
 203     g_mutex_unlock(&s->data_mutex);
 204 }
 205
 206 static void read_guest_mem(const void *data)
 207 {
 208     TestServer *s = (void *)data;
 209     uint32_t *guest_mem;
 210     int i, j;
 211     size_t size;
 212
 213     wait_for_fds(s);
 214
 215     g_mutex_lock(&s->data_mutex);
 216
 217     /* iterate all regions */
 218     for (i = 0; i < s->fds_num; i++) {
 219
 220         /* We'll check only the region statring at 0x0*/
 221         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 222             continue;
 223         }
 224
 225         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 226
 227         size = s->memory.regions[i].memory_size +
 228             s->memory.regions[i].mmap_offset;
 229
 230         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 231                          MAP_SHARED, s->fds[i], 0);
 232
 233         g_assert(guest_mem != MAP_FAILED);
 234         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 235
 236         for (j = 0; j < 256; j++) {
 237             uint32_t a = readl(s->memory.regions[i].guest_phys_addr + j*4);
 238             uint32_t b = guest_mem[j];
 239
 240             g_assert_cmpint(a, ==, b);
 241         }
 242
 243         munmap(guest_mem, s->memory.regions[i].memory_size);
 244     }
 245
 246     g_mutex_unlock(&s->data_mutex);
 247 }
 248
 249 static void *thread_function(void *data)
 250 {
 251     GMainLoop *loop = data;
 252     g_main_loop_run(loop);
 253     return NULL;
 254 }
 255
 256 static int chr_can_read(void *opaque)
 257 {
 258     return VHOST_USER_HDR_SIZE;
 259 }
 260
 261 static void chr_read(void *opaque, const uint8_t *buf, int size)
 262 {
 263     TestServer *s = opaque;
 264     CharBackend *chr = &s->chr;
 265     VhostUserMsg msg;
 266     uint8_t *p = (uint8_t *) &msg;
 267     int fd;
 268
 269     if (s->test_fail) {
 270         qemu_chr_fe_disconnect(chr);
 271         /* now switch to non-failure */
 272         s->test_fail = false;
 273     }
 274
 275     if (size != VHOST_USER_HDR_SIZE) {
 276         g_test_message("Wrong message size received %d\n", size);
 277         return;
 278     }
 279
 280     g_mutex_lock(&s->data_mutex);
 281     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 282
 283     if (msg.size) {
 284         p += VHOST_USER_HDR_SIZE;
 285         size = qemu_chr_fe_read_all(chr, p, msg.size);
 286         if (size != msg.size) {
 287             g_test_message("Wrong message size received %d != %d\n",
 288                            size, msg.size);
 289             return;
 290         }
 291     }
 292
 293     switch (msg.request) {
 294     case VHOST_USER_GET_FEATURES:
 295         /* send back features to qemu */
 296         msg.flags |= VHOST_USER_REPLY_MASK;
 297         msg.size = sizeof(m.payload.u64);
 298         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 299             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 300         if (s->queues > 1) {
 301             msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
 302         }
 303         if (s->test_flags >= TEST_FLAGS_BAD) {
 304             msg.payload.u64 = 0;
 305             s->test_flags = TEST_FLAGS_END;
 306         }
 307         p = (uint8_t *) &msg;
 308         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 309         break;
 310
 311     case VHOST_USER_SET_FEATURES:
 312         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 313                         !=, 0ULL);
 314         if (s->test_flags == TEST_FLAGS_DISCONNECT) {
 315             qemu_chr_fe_disconnect(chr);
 316             s->test_flags = TEST_FLAGS_BAD;
 317         }
 318         break;
 319
 320     case VHOST_USER_GET_PROTOCOL_FEATURES:
 321         /* send back features to qemu */
 322         msg.flags |= VHOST_USER_REPLY_MASK;
 323         msg.size = sizeof(m.payload.u64);
 324         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 325         if (s->queues > 1) {
 326             msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
 327         }
 328         p = (uint8_t *) &msg;
 329         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 330         break;
 331
 332     case VHOST_USER_GET_VRING_BASE:
 333         /* send back vring base to qemu */
 334         msg.flags |= VHOST_USER_REPLY_MASK;
 335         msg.size = sizeof(m.payload.state);
 336         msg.payload.state.num = 0;
 337         p = (uint8_t *) &msg;
 338         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 339
 340         assert(msg.payload.state.index < s->queues * 2);
 341         s->rings &= ~(0x1ULL << msg.payload.state.index);
 342         break;
 343
 344     case VHOST_USER_SET_MEM_TABLE:
 345         /* received the mem table */
 346         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 347         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds,
 348                                             G_N_ELEMENTS(s->fds));
 349
 350         /* signal the test that it can continue */
 351         g_cond_signal(&s->data_cond);
 352         break;
 353
 354     case VHOST_USER_SET_VRING_KICK:
 355     case VHOST_USER_SET_VRING_CALL:
 356         /* consume the fd */
 357         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 358         /*
 359          * This is a non-blocking eventfd.
 360          * The receive function forces it to be blocking,
 361          * so revert it back to non-blocking.
 362          */
 363         qemu_set_nonblock(fd);
 364         break;
 365
 366     case VHOST_USER_SET_LOG_BASE:
 367         if (s->log_fd != -1) {
 368             close(s->log_fd);
 369             s->log_fd = -1;
 370         }
 371         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 372         msg.flags |= VHOST_USER_REPLY_MASK;
 373         msg.size = 0;
 374         p = (uint8_t *) &msg;
 375         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 376
 377         g_cond_signal(&s->data_cond);
 378         break;
 379
 380     case VHOST_USER_SET_VRING_BASE:
 381         assert(msg.payload.state.index < s->queues * 2);
 382         s->rings |= 0x1ULL << msg.payload.state.index;
 383         break;
 384
 385     case VHOST_USER_GET_QUEUE_NUM:
 386         msg.flags |= VHOST_USER_REPLY_MASK;
 387         msg.size = sizeof(m.payload.u64);
 388         msg.payload.u64 = s->queues;
 389         p = (uint8_t *) &msg;
 390         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 391         break;
 392
 393     default:
 394         break;
 395     }
 396
 397     g_mutex_unlock(&s->data_mutex);
 398 }
 399
 400 static const char *init_hugepagefs(const char *path)
 401 {
 402     struct statfs fs;
 403     int ret;
 404
 405     if (access(path, R_OK | W_OK | X_OK)) {
 406         g_test_message("access on path (%s): %s\n", path, strerror(errno));
 407         return NULL;
 408     }
 409
 410     do {
 411         ret = statfs(path, &fs);
 412     } while (ret != 0 && errno == EINTR);
 413
 414     if (ret != 0) {
 415         g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
 416         return NULL;
 417     }
 418
 419     if (fs.f_type != HUGETLBFS_MAGIC) {
 420         g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
 421         return NULL;
 422     }
 423
 424     return path;
 425 }
 426
 427 static TestServer *test_server_new(const gchar *name)
 428 {
 429     TestServer *server = g_new0(TestServer, 1);
 430
 431     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 432     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 433     server->chr_name = g_strdup_printf("chr-%s", name);
 434
 435     g_mutex_init(&server->data_mutex);
 436     g_cond_init(&server->data_cond);
 437
 438     server->log_fd = -1;
 439     server->queues = 1;
 440
 441     return server;
 442 }
 443
 444 static void chr_event(void *opaque, int event)
 445 {
 446     TestServer *s = opaque;
 447
 448     if (s->test_flags == TEST_FLAGS_END &&
 449         event == CHR_EVENT_CLOSED) {
 450         s->test_flags = TEST_FLAGS_OK;
 451     }
 452 }
 453
 454 static void test_server_create_chr(TestServer *server, const gchar *opt)
 455 {
 456     gchar *chr_path;
 457     CharDriverState *chr;
 458
 459     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 460     chr = qemu_chr_new(server->chr_name, chr_path);
 461     g_free(chr_path);
 462
 463     qemu_chr_fe_init(&server->chr, chr, &error_abort);
 464     qemu_chr_fe_set_handlers(&server->chr, chr_can_read, chr_read,
 465                              chr_event, server, NULL, true);
 466 }
 467
 468 static void test_server_listen(TestServer *server)
 469 {
 470     test_server_create_chr(server, ",server,nowait");
 471 }
 472
 473 static inline void test_server_connect(TestServer *server)
 474 {
 475     test_server_create_chr(server, ",reconnect=1");
 476 }
 477
 478 #define GET_QEMU_CMD(s)                                         \
 479     g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name,  \
 480                     (s)->socket_path, "", (s)->chr_name)
 481
 482 #define GET_QEMU_CMDE(s, mem, chr_opts, extra, ...)                     \
 483     g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
 484                     (s)->socket_path, (chr_opts), (s)->chr_name, ##__VA_ARGS__)
 485
 486 static gboolean _test_server_free(TestServer *server)
 487 {
 488     int i;
 489     CharDriverState *chr = qemu_chr_fe_get_driver(&server->chr);
 490
 491     qemu_chr_fe_deinit(&server->chr);
 492     qemu_chr_delete(chr);
 493
 494     for (i = 0; i < server->fds_num; i++) {
 495         close(server->fds[i]);
 496     }
 497
 498     if (server->log_fd != -1) {
 499         close(server->log_fd);
 500     }
 501
 502     unlink(server->socket_path);
 503     g_free(server->socket_path);
 504
 505     unlink(server->mig_path);
 506     g_free(server->mig_path);
 507
 508     g_free(server->chr_name);
 509     g_free(server);
 510
 511     return FALSE;
 512 }
 513
 514 static void test_server_free(TestServer *server)
 515 {
 516     g_idle_add((GSourceFunc)_test_server_free, server);
 517 }
 518
 519 static void wait_for_log_fd(TestServer *s)
 520 {
 521     gint64 end_time;
 522
 523     g_mutex_lock(&s->data_mutex);
 524     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 525     while (s->log_fd == -1) {
 526         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 527             /* timeout has passed */
 528             g_assert(s->log_fd != -1);
 529             break;
 530         }
 531     }
 532
 533     g_mutex_unlock(&s->data_mutex);
 534 }
 535
 536 static void write_guest_mem(TestServer *s, uint32_t seed)
 537 {
 538     uint32_t *guest_mem;
 539     int i, j;
 540     size_t size;
 541
 542     wait_for_fds(s);
 543
 544     /* iterate all regions */
 545     for (i = 0; i < s->fds_num; i++) {
 546
 547         /* We'll write only the region statring at 0x0 */
 548         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 549             continue;
 550         }
 551
 552         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 553
 554         size = s->memory.regions[i].memory_size +
 555             s->memory.regions[i].mmap_offset;
 556
 557         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 558                          MAP_SHARED, s->fds[i], 0);
 559
 560         g_assert(guest_mem != MAP_FAILED);
 561         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 562
 563         for (j = 0; j < 256; j++) {
 564             guest_mem[j] = seed + j;
 565         }
 566
 567         munmap(guest_mem, s->memory.regions[i].memory_size);
 568         break;
 569     }
 570 }
 571
 572 static guint64 get_log_size(TestServer *s)
 573 {
 574     guint64 log_size = 0;
 575     int i;
 576
 577     for (i = 0; i < s->memory.nregions; ++i) {
 578         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 579         guint64 last = range_get_last(reg->guest_phys_addr,
 580                                        reg->memory_size);
 581         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 582     }
 583
 584     return log_size;
 585 }
 586
 587 typedef struct TestMigrateSource {
 588     GSource source;
 589     TestServer *src;
 590     TestServer *dest;
 591 } TestMigrateSource;
 592
 593 static gboolean
 594 test_migrate_source_check(GSource *source)
 595 {
 596     TestMigrateSource *t = (TestMigrateSource *)source;
 597     gboolean overlap = t->src->rings && t->dest->rings;
 598
 599     g_assert(!overlap);
 600
 601     return FALSE;
 602 }
 603
 604 #if !GLIB_CHECK_VERSION(2,36,0)
 605 /* this callback is unnecessary with glib >2.36, the default
 606  * prepare for the source does the same */
 607 static gboolean
 608 test_migrate_source_prepare(GSource *source, gint *timeout)
 609 {
 610     *timeout = -1;
 611     return FALSE;
 612 }
 613 #endif
 614
 615 GSourceFuncs test_migrate_source_funcs = {
 616 #if !GLIB_CHECK_VERSION(2,36,0)
 617     .prepare = test_migrate_source_prepare,
 618 #endif
 619     .check = test_migrate_source_check,
 620 };
 621
 622 static void test_migrate(void)
 623 {
 624     TestServer *s = test_server_new("src");
 625     TestServer *dest = test_server_new("dest");
 626     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 627     QTestState *global = global_qtest, *from, *to;
 628     GSource *source;
 629     gchar *cmd;
 630     QDict *rsp;
 631     guint8 *log;
 632     guint64 size;
 633
 634     test_server_listen(s);
 635     test_server_listen(dest);
 636
 637     cmd = GET_QEMU_CMDE(s, 2, "", "");
 638     from = qtest_start(cmd);
 639     g_free(cmd);
 640
 641     init_virtio_dev(s);
 642     wait_for_fds(s);
 643     size = get_log_size(s);
 644     g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 645
 646     cmd = GET_QEMU_CMDE(dest, 2, "", " -incoming %s", uri);
 647     to = qtest_init(cmd);
 648     g_free(cmd);
 649
 650     source = g_source_new(&test_migrate_source_funcs,
 651                           sizeof(TestMigrateSource));
 652     ((TestMigrateSource *)source)->src = s;
 653     ((TestMigrateSource *)source)->dest = dest;
 654     g_source_attach(source, NULL);
 655
 656     /* slow down migration to have time to fiddle with log */
 657     /* TODO: qtest could learn to break on some places */
 658     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 659               "'arguments': { 'value': 10 } }");
 660     g_assert(qdict_haskey(rsp, "return"));
 661     QDECREF(rsp);
 662
 663     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 664                           "'arguments': { 'uri': '%s' } }",
 665                           uri);
 666     rsp = qmp(cmd);
 667     g_free(cmd);
 668     g_assert(qdict_haskey(rsp, "return"));
 669     QDECREF(rsp);
 670
 671     wait_for_log_fd(s);
 672
 673     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 674     g_assert(log != MAP_FAILED);
 675
 676     /* modify first page */
 677     write_guest_mem(s, 0x42);
 678     log[0] = 1;
 679     munmap(log, size);
 680
 681     /* speed things up */
 682     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 683               "'arguments': { 'value': 0 } }");
 684     g_assert(qdict_haskey(rsp, "return"));
 685     QDECREF(rsp);
 686
 687     qmp_eventwait("STOP");
 688
 689     global_qtest = to;
 690     qmp_eventwait("RESUME");
 691
 692     read_guest_mem(dest);
 693
 694     g_source_destroy(source);
 695     g_source_unref(source);
 696
 697     qtest_quit(to);
 698     test_server_free(dest);
 699     qtest_quit(from);
 700     test_server_free(s);
 701     g_free(uri);
 702
 703     global_qtest = global;
 704 }
 705
 706 static void wait_for_rings_started(TestServer *s, size_t count)
 707 {
 708     gint64 end_time;
 709
 710     g_mutex_lock(&s->data_mutex);
 711     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 712     while (ctpop64(s->rings) != count) {
 713         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 714             /* timeout has passed */
 715             g_assert_cmpint(ctpop64(s->rings), ==, count);
 716             break;
 717         }
 718     }
 719
 720     g_mutex_unlock(&s->data_mutex);
 721 }
 722
 723 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 724 static gboolean
 725 reconnect_cb(gpointer user_data)
 726 {
 727     TestServer *s = user_data;
 728
 729     qemu_chr_fe_disconnect(&s->chr);
 730
 731     return FALSE;
 732 }
 733
 734 static gpointer
 735 connect_thread(gpointer data)
 736 {
 737     TestServer *s = data;
 738
 739     /* wait for qemu to start before first try, to avoid extra warnings */
 740     g_usleep(G_USEC_PER_SEC);
 741     test_server_connect(s);
 742
 743     return NULL;
 744 }
 745
 746 static void test_reconnect_subprocess(void)
 747 {
 748     TestServer *s = test_server_new("reconnect");
 749     char *cmd;
 750
 751     g_thread_new("connect", connect_thread, s);
 752     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 753     qtest_start(cmd);
 754     g_free(cmd);
 755
 756     init_virtio_dev(s);
 757     wait_for_fds(s);
 758     wait_for_rings_started(s, 2);
 759
 760     /* reconnect */
 761     s->fds_num = 0;
 762     s->rings = 0;
 763     g_idle_add(reconnect_cb, s);
 764     wait_for_fds(s);
 765     wait_for_rings_started(s, 2);
 766
 767     qtest_end();
 768     test_server_free(s);
 769     return;
 770 }
 771
 772 static void test_reconnect(void)
 773 {
 774     gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
 775                                   qtest_get_arch());
 776     g_test_trap_subprocess(path, 0, 0);
 777     g_test_trap_assert_passed();
 778     g_free(path);
 779 }
 780
 781 static void test_connect_fail_subprocess(void)
 782 {
 783     TestServer *s = test_server_new("connect-fail");
 784     char *cmd;
 785
 786     s->test_fail = true;
 787     g_thread_new("connect", connect_thread, s);
 788     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 789     qtest_start(cmd);
 790     g_free(cmd);
 791
 792     init_virtio_dev(s);
 793     wait_for_fds(s);
 794     wait_for_rings_started(s, 2);
 795
 796     qtest_end();
 797     test_server_free(s);
 798 }
 799
 800 static void test_connect_fail(void)
 801 {
 802     gchar *path = g_strdup_printf("/%s/vhost-user/connect-fail/subprocess",
 803                                   qtest_get_arch());
 804     g_test_trap_subprocess(path, 0, 0);
 805     g_test_trap_assert_passed();
 806     g_free(path);
 807 }
 808
 809 static void test_flags_mismatch_subprocess(void)
 810 {
 811     TestServer *s = test_server_new("flags-mismatch");
 812     char *cmd;
 813
 814     s->test_flags = TEST_FLAGS_DISCONNECT;
 815     g_thread_new("connect", connect_thread, s);
 816     cmd = GET_QEMU_CMDE(s, 2, ",server", "");
 817     qtest_start(cmd);
 818     g_free(cmd);
 819
 820     init_virtio_dev(s);
 821     wait_for_fds(s);
 822     wait_for_rings_started(s, 2);
 823
 824     qtest_end();
 825     test_server_free(s);
 826 }
 827
 828 static void test_flags_mismatch(void)
 829 {
 830     gchar *path = g_strdup_printf("/%s/vhost-user/flags-mismatch/subprocess",
 831                                   qtest_get_arch());
 832     g_test_trap_subprocess(path, 0, 0);
 833     g_test_trap_assert_passed();
 834     g_free(path);
 835 }
 836
 837 #endif
 838
 839 static QVirtioPCIDevice *virtio_net_pci_init(QPCIBus *bus, int slot)
 840 {
 841     QVirtioPCIDevice *dev;
 842
 843     dev = qvirtio_pci_device_find(bus, VIRTIO_ID_NET);
 844     g_assert(dev != NULL);
 845     g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_NET);
 846
 847     qvirtio_pci_device_enable(dev);
 848     qvirtio_reset(&dev->vdev);
 849     qvirtio_set_acknowledge(&dev->vdev);
 850     qvirtio_set_driver(&dev->vdev);
 851
 852     return dev;
 853 }
 854
 855 static void driver_init(QVirtioDevice *dev)
 856 {
 857     uint32_t features;
 858
 859     features = qvirtio_get_features(dev);
 860     features = features & ~(QVIRTIO_F_BAD_FEATURE |
 861                             (1u << VIRTIO_RING_F_INDIRECT_DESC) |
 862                             (1u << VIRTIO_RING_F_EVENT_IDX));
 863     qvirtio_set_features(dev, features);
 864
 865     qvirtio_set_driver_ok(dev);
 866 }
 867
 868 #define PCI_SLOT                0x04
 869
 870 static void test_multiqueue(void)
 871 {
 872     const int queues = 2;
 873     TestServer *s = test_server_new("mq");
 874     QVirtioPCIDevice *dev;
 875     QPCIBus *bus;
 876     QVirtQueuePCI *vq[queues * 2];
 877     QGuestAllocator *alloc;
 878     char *cmd;
 879     int i;
 880
 881     s->queues = queues;
 882     test_server_listen(s);
 883
 884     cmd = g_strdup_printf(QEMU_CMD_MEM QEMU_CMD_CHR QEMU_CMD_NETDEV ",queues=%d "
 885                           "-device virtio-net-pci,netdev=net0,mq=on,vectors=%d",
 886                           512, 512, root, s->chr_name,
 887                           s->socket_path, "", s->chr_name,
 888                           queues, queues * 2 + 2);
 889     qtest_start(cmd);
 890     g_free(cmd);
 891
 892     bus = qpci_init_pc(NULL);
 893     dev = virtio_net_pci_init(bus, PCI_SLOT);
 894
 895     alloc = pc_alloc_init();
 896     for (i = 0; i < queues * 2; i++) {
 897         vq[i] = (QVirtQueuePCI *)qvirtqueue_setup(&dev->vdev, alloc, i);
 898     }
 899
 900     driver_init(&dev->vdev);
 901     wait_for_rings_started(s, queues * 2);
 902
 903     /* End test */
 904     for (i = 0; i < queues * 2; i++) {
 905         qvirtqueue_cleanup(dev->vdev.bus, &vq[i]->vq, alloc);
 906     }
 907     pc_alloc_uninit(alloc);
 908     qvirtio_pci_device_disable(dev);
 909     g_free(dev->pdev);
 910     g_free(dev);
 911     qpci_free_pc(bus);
 912     qtest_end();
 913
 914     test_server_free(s);
 915 }
 916
 917 int main(int argc, char **argv)
 918 {
 919     QTestState *s = NULL;
 920     TestServer *server = NULL;
 921     const char *hugefs;
 922     char *qemu_cmd = NULL;
 923     int ret;
 924     char template[] = "/tmp/vhost-test-XXXXXX";
 925     GMainLoop *loop;
 926     GThread *thread;
 927
 928     g_test_init(&argc, &argv, NULL);
 929
 930     module_call_init(MODULE_INIT_QOM);
 931     qemu_add_opts(&qemu_chardev_opts);
 932
 933     tmpfs = mkdtemp(template);
 934     if (!tmpfs) {
 935         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 936     }
 937     g_assert(tmpfs);
 938
 939     hugefs = getenv("QTEST_HUGETLBFS_PATH");
 940     if (hugefs) {
 941         root = init_hugepagefs(hugefs);
 942         g_assert(root);
 943     } else {
 944         root = tmpfs;
 945     }
 946
 947     server = test_server_new("test");
 948     test_server_listen(server);
 949
 950     loop = g_main_loop_new(NULL, FALSE);
 951     /* run the main loop thread so the chardev may operate */
 952     thread = g_thread_new(NULL, thread_function, loop);
 953
 954     qemu_cmd = GET_QEMU_CMD(server);
 955
 956     s = qtest_start(qemu_cmd);
 957     g_free(qemu_cmd);
 958     init_virtio_dev(server);
 959
 960     qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
 961     qtest_add_func("/vhost-user/migrate", test_migrate);
 962     qtest_add_func("/vhost-user/multiqueue", test_multiqueue);
 963 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 964     qtest_add_func("/vhost-user/reconnect/subprocess",
 965                    test_reconnect_subprocess);
 966     qtest_add_func("/vhost-user/reconnect", test_reconnect);
 967     qtest_add_func("/vhost-user/connect-fail/subprocess",
 968                    test_connect_fail_subprocess);
 969     qtest_add_func("/vhost-user/connect-fail", test_connect_fail);
 970     qtest_add_func("/vhost-user/flags-mismatch/subprocess",
 971                    test_flags_mismatch_subprocess);
 972     qtest_add_func("/vhost-user/flags-mismatch", test_flags_mismatch);
 973 #endif
 974
 975     ret = g_test_run();
 976
 977     if (s) {
 978         qtest_quit(s);
 979     }
 980
 981     /* cleanup */
 982     test_server_free(server);
 983
 984     /* finish the helper thread and dispatch pending sources */
 985     g_main_loop_quit(loop);
 986     g_thread_join(thread);
 987     while (g_main_context_pending(NULL)) {
 988         g_main_context_iteration (NULL, TRUE);
 989     }
 990     g_main_loop_unref(loop);
 991
 992     ret = rmdir(tmpfs);
 993     if (ret != 0) {
 994         g_test_message("unable to rmdir: path (%s): %s\n",
 995                        tmpfs, strerror(errno));
 996     }
 997     g_assert_cmpint(ret, ==, 0);
 998
 999     return ret;
1000 }