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-single.h"
  14 #include "qapi/error.h"
  15 #include "qapi/qmp/qdict.h"
  16 #include "qemu/config-file.h"
  17 #include "qemu/option.h"
  18 #include "qemu/range.h"
  19 #include "qemu/sockets.h"
  20 #include "chardev/char-fe.h"
  21 #include "qemu/memfd.h"
  22 #include "qemu/module.h"
  23 #include "sysemu/sysemu.h"
  24 #include "libqos/libqos.h"
  25 #include "libqos/pci-pc.h"
  26 #include "libqos/virtio-pci.h"
  27
  28 #include "libqos/malloc-pc.h"
  29 #include "hw/virtio/virtio-net.h"
  30
  31 #include "standard-headers/linux/vhost_types.h"
  32 #include "standard-headers/linux/virtio_ids.h"
  33 #include "standard-headers/linux/virtio_net.h"
  34
  35 #ifdef CONFIG_LINUX
  36 #include <sys/vfs.h>
  37 #endif
  38
  39
  40 #define QEMU_CMD_MEM    " -m %d -object memory-backend-file,id=mem,size=%dM," \
  41                         "mem-path=%s,share=on -numa node,memdev=mem"
  42 #define QEMU_CMD_MEMFD  " -m %d -object memory-backend-memfd,id=mem,size=%dM," \
  43                         " -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=hs0,chardev=%s,vhostforce"
  46
  47 #define HUGETLBFS_MAGIC       0x958458f6
  48
  49 /*********** FROM hw/virtio/vhost-user.c *************************************/
  50
  51 #define VHOST_MEMORY_MAX_NREGIONS    8
  52 #define VHOST_MAX_VIRTQUEUES    0x100
  53
  54 #define VHOST_USER_F_PROTOCOL_FEATURES 30
  55 #define VHOST_USER_PROTOCOL_F_MQ 0
  56 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  57 #define VHOST_USER_PROTOCOL_F_CROSS_ENDIAN   6
  58
  59 #define VHOST_LOG_PAGE 0x1000
  60
  61 typedef enum VhostUserRequest {
  62     VHOST_USER_NONE = 0,
  63     VHOST_USER_GET_FEATURES = 1,
  64     VHOST_USER_SET_FEATURES = 2,
  65     VHOST_USER_SET_OWNER = 3,
  66     VHOST_USER_RESET_OWNER = 4,
  67     VHOST_USER_SET_MEM_TABLE = 5,
  68     VHOST_USER_SET_LOG_BASE = 6,
  69     VHOST_USER_SET_LOG_FD = 7,
  70     VHOST_USER_SET_VRING_NUM = 8,
  71     VHOST_USER_SET_VRING_ADDR = 9,
  72     VHOST_USER_SET_VRING_BASE = 10,
  73     VHOST_USER_GET_VRING_BASE = 11,
  74     VHOST_USER_SET_VRING_KICK = 12,
  75     VHOST_USER_SET_VRING_CALL = 13,
  76     VHOST_USER_SET_VRING_ERR = 14,
  77     VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  78     VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  79     VHOST_USER_GET_QUEUE_NUM = 17,
  80     VHOST_USER_SET_VRING_ENABLE = 18,
  81     VHOST_USER_MAX
  82 } VhostUserRequest;
  83
  84 typedef struct VhostUserMemoryRegion {
  85     uint64_t guest_phys_addr;
  86     uint64_t memory_size;
  87     uint64_t userspace_addr;
  88     uint64_t mmap_offset;
  89 } VhostUserMemoryRegion;
  90
  91 typedef struct VhostUserMemory {
  92     uint32_t nregions;
  93     uint32_t padding;
  94     VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  95 } VhostUserMemory;
  96
  97 typedef struct VhostUserLog {
  98     uint64_t mmap_size;
  99     uint64_t mmap_offset;
 100 } VhostUserLog;
 101
 102 typedef struct VhostUserMsg {
 103     VhostUserRequest request;
 104
 105 #define VHOST_USER_VERSION_MASK     (0x3)
 106 #define VHOST_USER_REPLY_MASK       (0x1<<2)
 107     uint32_t flags;
 108     uint32_t size; /* the following payload size */
 109     union {
 110 #define VHOST_USER_VRING_IDX_MASK   (0xff)
 111 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 112         uint64_t u64;
 113         struct vhost_vring_state state;
 114         struct vhost_vring_addr addr;
 115         VhostUserMemory memory;
 116         VhostUserLog log;
 117     } payload;
 118 } QEMU_PACKED VhostUserMsg;
 119
 120 static VhostUserMsg m __attribute__ ((unused));
 121 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
 122                             + sizeof(m.flags) \
 123                             + sizeof(m.size))
 124
 125 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
 126
 127 /* The version of the protocol we support */
 128 #define VHOST_USER_VERSION    (0x1)
 129 /*****************************************************************************/
 130
 131 enum {
 132     TEST_FLAGS_OK,
 133     TEST_FLAGS_DISCONNECT,
 134     TEST_FLAGS_BAD,
 135     TEST_FLAGS_END,
 136 };
 137
 138 typedef struct TestServer {
 139     gchar *socket_path;
 140     gchar *mig_path;
 141     gchar *chr_name;
 142     gchar *tmpfs;
 143     CharBackend chr;
 144     int fds_num;
 145     int fds[VHOST_MEMORY_MAX_NREGIONS];
 146     VhostUserMemory memory;
 147     GMainContext *context;
 148     GMainLoop *loop;
 149     GThread *thread;
 150     GMutex data_mutex;
 151     GCond data_cond;
 152     int log_fd;
 153     uint64_t rings;
 154     bool test_fail;
 155     int test_flags;
 156     int queues;
 157 } TestServer;
 158
 159 static const char *init_hugepagefs(void);
 160 static TestServer *test_server_new(const gchar *name);
 161 static void test_server_free(TestServer *server);
 162 static void test_server_listen(TestServer *server);
 163
 164 enum test_memfd {
 165     TEST_MEMFD_AUTO,
 166     TEST_MEMFD_YES,
 167     TEST_MEMFD_NO,
 168 };
 169
 170 static void append_vhost_opts(TestServer *s, GString *cmd_line,
 171                              const char *chr_opts)
 172 {
 173     g_string_append_printf(cmd_line, QEMU_CMD_CHR QEMU_CMD_NETDEV,
 174                            s->chr_name, s->socket_path,
 175                            chr_opts, s->chr_name);
 176 }
 177
 178 static void append_mem_opts(TestServer *server, GString *cmd_line,
 179                             int size, enum test_memfd memfd)
 180 {
 181     if (memfd == TEST_MEMFD_AUTO) {
 182         memfd = qemu_memfd_check(MFD_ALLOW_SEALING) ? TEST_MEMFD_YES
 183                                                     : TEST_MEMFD_NO;
 184     }
 185
 186     if (memfd == TEST_MEMFD_YES) {
 187         g_string_append_printf(cmd_line, QEMU_CMD_MEMFD, size, size);
 188     } else {
 189         const char *root = init_hugepagefs() ? : server->tmpfs;
 190
 191         g_string_append_printf(cmd_line, QEMU_CMD_MEM, size, size, root);
 192     }
 193 }
 194
 195 static bool wait_for_fds(TestServer *s)
 196 {
 197     gint64 end_time;
 198     bool got_region;
 199     int i;
 200
 201     g_mutex_lock(&s->data_mutex);
 202
 203     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 204     while (!s->fds_num) {
 205         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 206             /* timeout has passed */
 207             g_assert(s->fds_num);
 208             break;
 209         }
 210     }
 211
 212     /* check for sanity */
 213     g_assert_cmpint(s->fds_num, >, 0);
 214     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 215
 216     g_mutex_unlock(&s->data_mutex);
 217
 218     got_region = false;
 219     for (i = 0; i < s->memory.nregions; ++i) {
 220         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 221         if (reg->guest_phys_addr == 0) {
 222             got_region = true;
 223             break;
 224         }
 225     }
 226     if (!got_region) {
 227         g_test_skip("No memory at address 0x0");
 228     }
 229     return got_region;
 230 }
 231
 232 static void read_guest_mem_server(QTestState *qts, TestServer *s)
 233 {
 234     uint8_t *guest_mem;
 235     int i, j;
 236     size_t size;
 237
 238     g_mutex_lock(&s->data_mutex);
 239
 240     /* iterate all regions */
 241     for (i = 0; i < s->fds_num; i++) {
 242
 243         /* We'll check only the region statring at 0x0*/
 244         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 245             continue;
 246         }
 247
 248         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 249
 250         size = s->memory.regions[i].memory_size +
 251             s->memory.regions[i].mmap_offset;
 252
 253         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 254                          MAP_SHARED, s->fds[i], 0);
 255
 256         g_assert(guest_mem != MAP_FAILED);
 257         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 258
 259         for (j = 0; j < 1024; j++) {
 260             uint32_t a = qtest_readb(qts, s->memory.regions[i].guest_phys_addr + j);
 261             uint32_t b = guest_mem[j];
 262
 263             g_assert_cmpint(a, ==, b);
 264         }
 265
 266         munmap(guest_mem, s->memory.regions[i].memory_size);
 267     }
 268
 269     g_mutex_unlock(&s->data_mutex);
 270 }
 271
 272 static void *thread_function(void *data)
 273 {
 274     GMainLoop *loop = data;
 275     g_main_loop_run(loop);
 276     return NULL;
 277 }
 278
 279 static int chr_can_read(void *opaque)
 280 {
 281     return VHOST_USER_HDR_SIZE;
 282 }
 283
 284 static void chr_read(void *opaque, const uint8_t *buf, int size)
 285 {
 286     TestServer *s = opaque;
 287     CharBackend *chr = &s->chr;
 288     VhostUserMsg msg;
 289     uint8_t *p = (uint8_t *) &msg;
 290     int fd = -1;
 291
 292     if (s->test_fail) {
 293         qemu_chr_fe_disconnect(chr);
 294         /* now switch to non-failure */
 295         s->test_fail = false;
 296     }
 297
 298     if (size != VHOST_USER_HDR_SIZE) {
 299         g_test_message("Wrong message size received %d", size);
 300         return;
 301     }
 302
 303     g_mutex_lock(&s->data_mutex);
 304     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 305
 306     if (msg.size) {
 307         p += VHOST_USER_HDR_SIZE;
 308         size = qemu_chr_fe_read_all(chr, p, msg.size);
 309         if (size != msg.size) {
 310             g_test_message("Wrong message size received %d != %d",
 311                            size, msg.size);
 312             return;
 313         }
 314     }
 315
 316     switch (msg.request) {
 317     case VHOST_USER_GET_FEATURES:
 318         /* send back features to qemu */
 319         msg.flags |= VHOST_USER_REPLY_MASK;
 320         msg.size = sizeof(m.payload.u64);
 321         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 322             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 323         if (s->queues > 1) {
 324             msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
 325         }
 326         if (s->test_flags >= TEST_FLAGS_BAD) {
 327             msg.payload.u64 = 0;
 328             s->test_flags = TEST_FLAGS_END;
 329         }
 330         p = (uint8_t *) &msg;
 331         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 332         break;
 333
 334     case VHOST_USER_SET_FEATURES:
 335         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 336                         !=, 0ULL);
 337         if (s->test_flags == TEST_FLAGS_DISCONNECT) {
 338             qemu_chr_fe_disconnect(chr);
 339             s->test_flags = TEST_FLAGS_BAD;
 340         }
 341         break;
 342
 343     case VHOST_USER_GET_PROTOCOL_FEATURES:
 344         /* send back features to qemu */
 345         msg.flags |= VHOST_USER_REPLY_MASK;
 346         msg.size = sizeof(m.payload.u64);
 347         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 348         msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_CROSS_ENDIAN;
 349         if (s->queues > 1) {
 350             msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
 351         }
 352         p = (uint8_t *) &msg;
 353         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 354         break;
 355
 356     case VHOST_USER_GET_VRING_BASE:
 357         /* send back vring base to qemu */
 358         msg.flags |= VHOST_USER_REPLY_MASK;
 359         msg.size = sizeof(m.payload.state);
 360         msg.payload.state.num = 0;
 361         p = (uint8_t *) &msg;
 362         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 363
 364         assert(msg.payload.state.index < s->queues * 2);
 365         s->rings &= ~(0x1ULL << msg.payload.state.index);
 366         g_cond_broadcast(&s->data_cond);
 367         break;
 368
 369     case VHOST_USER_SET_MEM_TABLE:
 370         /* received the mem table */
 371         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 372         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds,
 373                                             G_N_ELEMENTS(s->fds));
 374
 375         /* signal the test that it can continue */
 376         g_cond_broadcast(&s->data_cond);
 377         break;
 378
 379     case VHOST_USER_SET_VRING_KICK:
 380     case VHOST_USER_SET_VRING_CALL:
 381         /* consume the fd */
 382         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 383         /*
 384          * This is a non-blocking eventfd.
 385          * The receive function forces it to be blocking,
 386          * so revert it back to non-blocking.
 387          */
 388         qemu_set_nonblock(fd);
 389         break;
 390
 391     case VHOST_USER_SET_LOG_BASE:
 392         if (s->log_fd != -1) {
 393             close(s->log_fd);
 394             s->log_fd = -1;
 395         }
 396         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 397         msg.flags |= VHOST_USER_REPLY_MASK;
 398         msg.size = 0;
 399         p = (uint8_t *) &msg;
 400         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 401
 402         g_cond_broadcast(&s->data_cond);
 403         break;
 404
 405     case VHOST_USER_SET_VRING_BASE:
 406         assert(msg.payload.state.index < s->queues * 2);
 407         s->rings |= 0x1ULL << msg.payload.state.index;
 408         g_cond_broadcast(&s->data_cond);
 409         break;
 410
 411     case VHOST_USER_GET_QUEUE_NUM:
 412         msg.flags |= VHOST_USER_REPLY_MASK;
 413         msg.size = sizeof(m.payload.u64);
 414         msg.payload.u64 = s->queues;
 415         p = (uint8_t *) &msg;
 416         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 417         break;
 418
 419     default:
 420         break;
 421     }
 422
 423     g_mutex_unlock(&s->data_mutex);
 424 }
 425
 426 static const char *init_hugepagefs(void)
 427 {
 428 #ifdef CONFIG_LINUX
 429     static const char *hugepagefs;
 430     const char *path = getenv("QTEST_HUGETLBFS_PATH");
 431     struct statfs fs;
 432     int ret;
 433
 434     if (hugepagefs) {
 435         return hugepagefs;
 436     }
 437     if (!path) {
 438         return NULL;
 439     }
 440
 441     if (access(path, R_OK | W_OK | X_OK)) {
 442         g_test_message("access on path (%s): %s", path, strerror(errno));
 443         g_test_fail();
 444         return NULL;
 445     }
 446
 447     do {
 448         ret = statfs(path, &fs);
 449     } while (ret != 0 && errno == EINTR);
 450
 451     if (ret != 0) {
 452         g_test_message("statfs on path (%s): %s", path, strerror(errno));
 453         g_test_fail();
 454         return NULL;
 455     }
 456
 457     if (fs.f_type != HUGETLBFS_MAGIC) {
 458         g_test_message("Warning: path not on HugeTLBFS: %s", path);
 459         g_test_fail();
 460         return NULL;
 461     }
 462
 463     hugepagefs = path;
 464     return hugepagefs;
 465 #else
 466     return NULL;
 467 #endif
 468 }
 469
 470 static TestServer *test_server_new(const gchar *name)
 471 {
 472     TestServer *server = g_new0(TestServer, 1);
 473     char template[] = "/tmp/vhost-test-XXXXXX";
 474     const char *tmpfs;
 475
 476     server->context = g_main_context_new();
 477     server->loop = g_main_loop_new(server->context, FALSE);
 478
 479     /* run the main loop thread so the chardev may operate */
 480     server->thread = g_thread_new(NULL, thread_function, server->loop);
 481
 482     tmpfs = mkdtemp(template);
 483     if (!tmpfs) {
 484         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
 485     }
 486     g_assert(tmpfs);
 487
 488     server->tmpfs = g_strdup(tmpfs);
 489     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 490     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 491     server->chr_name = g_strdup_printf("chr-%s", name);
 492
 493     g_mutex_init(&server->data_mutex);
 494     g_cond_init(&server->data_cond);
 495
 496     server->log_fd = -1;
 497     server->queues = 1;
 498
 499     return server;
 500 }
 501
 502 static void chr_event(void *opaque, int event)
 503 {
 504     TestServer *s = opaque;
 505
 506     if (s->test_flags == TEST_FLAGS_END &&
 507         event == CHR_EVENT_CLOSED) {
 508         s->test_flags = TEST_FLAGS_OK;
 509     }
 510 }
 511
 512 static void test_server_create_chr(TestServer *server, const gchar *opt)
 513 {
 514     gchar *chr_path;
 515     Chardev *chr;
 516
 517     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 518     chr = qemu_chr_new(server->chr_name, chr_path, server->context);
 519     g_free(chr_path);
 520
 521     g_assert_nonnull(chr);
 522     qemu_chr_fe_init(&server->chr, chr, &error_abort);
 523     qemu_chr_fe_set_handlers(&server->chr, chr_can_read, chr_read,
 524                              chr_event, NULL, server, server->context, true);
 525 }
 526
 527 static void test_server_listen(TestServer *server)
 528 {
 529     test_server_create_chr(server, ",server,nowait");
 530 }
 531
 532 static void test_server_free(TestServer *server)
 533 {
 534     int i, ret;
 535
 536     /* finish the helper thread and dispatch pending sources */
 537     g_main_loop_quit(server->loop);
 538     g_thread_join(server->thread);
 539     while (g_main_context_pending(NULL)) {
 540         g_main_context_iteration(NULL, TRUE);
 541     }
 542
 543     unlink(server->socket_path);
 544     g_free(server->socket_path);
 545
 546     unlink(server->mig_path);
 547     g_free(server->mig_path);
 548
 549     ret = rmdir(server->tmpfs);
 550     if (ret != 0) {
 551         g_test_message("unable to rmdir: path (%s): %s",
 552                        server->tmpfs, strerror(errno));
 553     }
 554     g_free(server->tmpfs);
 555
 556     qemu_chr_fe_deinit(&server->chr, true);
 557
 558     for (i = 0; i < server->fds_num; i++) {
 559         close(server->fds[i]);
 560     }
 561
 562     if (server->log_fd != -1) {
 563         close(server->log_fd);
 564     }
 565
 566     g_free(server->chr_name);
 567
 568     g_main_loop_unref(server->loop);
 569     g_main_context_unref(server->context);
 570     g_cond_clear(&server->data_cond);
 571     g_mutex_clear(&server->data_mutex);
 572     g_free(server);
 573 }
 574
 575 static void wait_for_log_fd(TestServer *s)
 576 {
 577     gint64 end_time;
 578
 579     g_mutex_lock(&s->data_mutex);
 580     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 581     while (s->log_fd == -1) {
 582         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 583             /* timeout has passed */
 584             g_assert(s->log_fd != -1);
 585             break;
 586         }
 587     }
 588
 589     g_mutex_unlock(&s->data_mutex);
 590 }
 591
 592 static void write_guest_mem(TestServer *s, uint32_t seed)
 593 {
 594     uint32_t *guest_mem;
 595     int i, j;
 596     size_t size;
 597
 598     /* iterate all regions */
 599     for (i = 0; i < s->fds_num; i++) {
 600
 601         /* We'll write only the region statring at 0x0 */
 602         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 603             continue;
 604         }
 605
 606         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 607
 608         size = s->memory.regions[i].memory_size +
 609             s->memory.regions[i].mmap_offset;
 610
 611         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 612                          MAP_SHARED, s->fds[i], 0);
 613
 614         g_assert(guest_mem != MAP_FAILED);
 615         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 616
 617         for (j = 0; j < 256; j++) {
 618             guest_mem[j] = seed + j;
 619         }
 620
 621         munmap(guest_mem, s->memory.regions[i].memory_size);
 622         break;
 623     }
 624 }
 625
 626 static guint64 get_log_size(TestServer *s)
 627 {
 628     guint64 log_size = 0;
 629     int i;
 630
 631     for (i = 0; i < s->memory.nregions; ++i) {
 632         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 633         guint64 last = range_get_last(reg->guest_phys_addr,
 634                                        reg->memory_size);
 635         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 636     }
 637
 638     return log_size;
 639 }
 640
 641 typedef struct TestMigrateSource {
 642     GSource source;
 643     TestServer *src;
 644     TestServer *dest;
 645 } TestMigrateSource;
 646
 647 static gboolean
 648 test_migrate_source_check(GSource *source)
 649 {
 650     TestMigrateSource *t = (TestMigrateSource *)source;
 651     gboolean overlap = t->src->rings && t->dest->rings;
 652
 653     g_assert(!overlap);
 654
 655     return FALSE;
 656 }
 657
 658 GSourceFuncs test_migrate_source_funcs = {
 659     .check = test_migrate_source_check,
 660 };
 661
 662 static void vhost_user_test_cleanup(void *s)
 663 {
 664     TestServer *server = s;
 665
 666     qos_invalidate_command_line();
 667     test_server_free(server);
 668 }
 669
 670 static void *vhost_user_test_setup(GString *cmd_line, void *arg)
 671 {
 672     TestServer *server = test_server_new("vhost-user-test");
 673     test_server_listen(server);
 674
 675     append_mem_opts(server, cmd_line, 256, TEST_MEMFD_AUTO);
 676     append_vhost_opts(server, cmd_line, "");
 677
 678     g_test_queue_destroy(vhost_user_test_cleanup, server);
 679
 680     return server;
 681 }
 682
 683 static void *vhost_user_test_setup_memfd(GString *cmd_line, void *arg)
 684 {
 685     TestServer *server = test_server_new("vhost-user-test");
 686     test_server_listen(server);
 687
 688     append_mem_opts(server, cmd_line, 256, TEST_MEMFD_YES);
 689     append_vhost_opts(server, cmd_line, "");
 690
 691     g_test_queue_destroy(vhost_user_test_cleanup, server);
 692
 693     return server;
 694 }
 695
 696 static void test_read_guest_mem(void *obj, void *arg, QGuestAllocator *alloc)
 697 {
 698     TestServer *server = arg;
 699
 700     if (!wait_for_fds(server)) {
 701         return;
 702     }
 703
 704     read_guest_mem_server(global_qtest, server);
 705 }
 706
 707 static void test_migrate(void *obj, void *arg, QGuestAllocator *alloc)
 708 {
 709     TestServer *s = arg;
 710     TestServer *dest = test_server_new("dest");
 711     GString *dest_cmdline = g_string_new(qos_get_current_command_line());
 712     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 713     QTestState *to;
 714     GSource *source;
 715     QDict *rsp;
 716     guint8 *log;
 717     guint64 size;
 718
 719     if (!wait_for_fds(s)) {
 720         return;
 721     }
 722
 723     size = get_log_size(s);
 724     g_assert_cmpint(size, ==, (256 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 725
 726     test_server_listen(dest);
 727     g_string_append_printf(dest_cmdline, " -incoming %s", uri);
 728     append_mem_opts(dest, dest_cmdline, 256, TEST_MEMFD_AUTO);
 729     append_vhost_opts(dest, dest_cmdline, "");
 730     to = qtest_init(dest_cmdline->str);
 731
 732     /* This would be where you call qos_allocate_objects(to, NULL), if you want
 733      * to talk to the QVirtioNet object on the destination.
 734      */
 735
 736     source = g_source_new(&test_migrate_source_funcs,
 737                           sizeof(TestMigrateSource));
 738     ((TestMigrateSource *)source)->src = s;
 739     ((TestMigrateSource *)source)->dest = dest;
 740     g_source_attach(source, s->context);
 741
 742     /* slow down migration to have time to fiddle with log */
 743     /* TODO: qtest could learn to break on some places */
 744     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 745               "'arguments': { 'value': 10 } }");
 746     g_assert(qdict_haskey(rsp, "return"));
 747     qobject_unref(rsp);
 748
 749     rsp = qmp("{ 'execute': 'migrate', 'arguments': { 'uri': %s } }", uri);
 750     g_assert(qdict_haskey(rsp, "return"));
 751     qobject_unref(rsp);
 752
 753     wait_for_log_fd(s);
 754
 755     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 756     g_assert(log != MAP_FAILED);
 757
 758     /* modify first page */
 759     write_guest_mem(s, 0x42);
 760     log[0] = 1;
 761     munmap(log, size);
 762
 763     /* speed things up */
 764     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 765               "'arguments': { 'value': 0 } }");
 766     g_assert(qdict_haskey(rsp, "return"));
 767     qobject_unref(rsp);
 768
 769     qmp_eventwait("STOP");
 770     qtest_qmp_eventwait(to, "RESUME");
 771
 772     g_assert(wait_for_fds(dest));
 773     read_guest_mem_server(to, dest);
 774
 775     g_source_destroy(source);
 776     g_source_unref(source);
 777
 778     qtest_quit(to);
 779     test_server_free(dest);
 780     g_free(uri);
 781 }
 782
 783 static void wait_for_rings_started(TestServer *s, size_t count)
 784 {
 785     gint64 end_time;
 786
 787     g_mutex_lock(&s->data_mutex);
 788     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 789     while (ctpop64(s->rings) != count) {
 790         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 791             /* timeout has passed */
 792             g_assert_cmpint(ctpop64(s->rings), ==, count);
 793             break;
 794         }
 795     }
 796
 797     g_mutex_unlock(&s->data_mutex);
 798 }
 799
 800 static inline void test_server_connect(TestServer *server)
 801 {
 802     test_server_create_chr(server, ",reconnect=1");
 803 }
 804
 805 static gboolean
 806 reconnect_cb(gpointer user_data)
 807 {
 808     TestServer *s = user_data;
 809
 810     qemu_chr_fe_disconnect(&s->chr);
 811
 812     return FALSE;
 813 }
 814
 815 static gpointer
 816 connect_thread(gpointer data)
 817 {
 818     TestServer *s = data;
 819
 820     /* wait for qemu to start before first try, to avoid extra warnings */
 821     g_usleep(G_USEC_PER_SEC);
 822     test_server_connect(s);
 823
 824     return NULL;
 825 }
 826
 827 static void *vhost_user_test_setup_reconnect(GString *cmd_line, void *arg)
 828 {
 829     TestServer *s = test_server_new("reconnect");
 830
 831     g_thread_new("connect", connect_thread, s);
 832     append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
 833     append_vhost_opts(s, cmd_line, ",server");
 834
 835     g_test_queue_destroy(vhost_user_test_cleanup, s);
 836
 837     return s;
 838 }
 839
 840 static void test_reconnect(void *obj, void *arg, QGuestAllocator *alloc)
 841 {
 842     TestServer *s = arg;
 843     GSource *src;
 844
 845     if (!wait_for_fds(s)) {
 846         return;
 847     }
 848
 849     wait_for_rings_started(s, 2);
 850
 851     /* reconnect */
 852     s->fds_num = 0;
 853     s->rings = 0;
 854     src = g_idle_source_new();
 855     g_source_set_callback(src, reconnect_cb, s, NULL);
 856     g_source_attach(src, s->context);
 857     g_source_unref(src);
 858     g_assert(wait_for_fds(s));
 859     wait_for_rings_started(s, 2);
 860 }
 861
 862 static void *vhost_user_test_setup_connect_fail(GString *cmd_line, void *arg)
 863 {
 864     TestServer *s = test_server_new("connect-fail");
 865
 866     s->test_fail = true;
 867
 868     g_thread_new("connect", connect_thread, s);
 869     append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
 870     append_vhost_opts(s, cmd_line, ",server");
 871
 872     g_test_queue_destroy(vhost_user_test_cleanup, s);
 873
 874     return s;
 875 }
 876
 877 static void *vhost_user_test_setup_flags_mismatch(GString *cmd_line, void *arg)
 878 {
 879     TestServer *s = test_server_new("flags-mismatch");
 880
 881     s->test_flags = TEST_FLAGS_DISCONNECT;
 882
 883     g_thread_new("connect", connect_thread, s);
 884     append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
 885     append_vhost_opts(s, cmd_line, ",server");
 886
 887     g_test_queue_destroy(vhost_user_test_cleanup, s);
 888
 889     return s;
 890 }
 891
 892 static void test_vhost_user_started(void *obj, void *arg, QGuestAllocator *alloc)
 893 {
 894     TestServer *s = arg;
 895
 896     if (!wait_for_fds(s)) {
 897         return;
 898     }
 899     wait_for_rings_started(s, 2);
 900 }
 901
 902 static void *vhost_user_test_setup_multiqueue(GString *cmd_line, void *arg)
 903 {
 904     TestServer *s = vhost_user_test_setup(cmd_line, arg);
 905
 906     s->queues = 2;
 907     g_string_append_printf(cmd_line,
 908                            " -set netdev.hs0.queues=%d"
 909                            " -global virtio-net-pci.vectors=%d",
 910                            s->queues, s->queues * 2 + 2);
 911
 912     return s;
 913 }
 914
 915 static void test_multiqueue(void *obj, void *arg, QGuestAllocator *alloc)
 916 {
 917     TestServer *s = arg;
 918
 919     wait_for_rings_started(s, s->queues * 2);
 920 }
 921
 922 static void register_vhost_user_test(void)
 923 {
 924     QOSGraphTestOptions opts = {
 925         .before = vhost_user_test_setup,
 926         .subprocess = true,
 927     };
 928
 929     qemu_add_opts(&qemu_chardev_opts);
 930
 931     qos_add_test("vhost-user/read-guest-mem/memfile",
 932                  "virtio-net",
 933                  test_read_guest_mem, &opts);
 934
 935     if (qemu_memfd_check(MFD_ALLOW_SEALING)) {
 936         opts.before = vhost_user_test_setup_memfd;
 937         qos_add_test("vhost-user/read-guest-mem/memfd",
 938                      "virtio-net",
 939                      test_read_guest_mem, &opts);
 940     }
 941
 942     qos_add_test("vhost-user/migrate",
 943                  "virtio-net",
 944                  test_migrate, &opts);
 945
 946     /* keeps failing on build-system since Aug 15 2017 */
 947     if (getenv("QTEST_VHOST_USER_FIXME")) {
 948         opts.before = vhost_user_test_setup_reconnect;
 949         qos_add_test("vhost-user/reconnect", "virtio-net",
 950                      test_reconnect, &opts);
 951
 952         opts.before = vhost_user_test_setup_connect_fail;
 953         qos_add_test("vhost-user/connect-fail", "virtio-net",
 954                      test_vhost_user_started, &opts);
 955
 956         opts.before = vhost_user_test_setup_flags_mismatch;
 957         qos_add_test("vhost-user/flags-mismatch", "virtio-net",
 958                      test_vhost_user_started, &opts);
 959     }
 960
 961     opts.before = vhost_user_test_setup_multiqueue;
 962     opts.edge.extra_device_opts = "mq=on";
 963     qos_add_test("vhost-user/multiqueue",
 964                  "virtio-net",
 965                  test_multiqueue, &opts);
 966 }
 967 libqos_init(register_vhost_user_test);