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 "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 "sysemu/sysemu.h"
  23 #include "libqos/libqos.h"
  24 #include "libqos/pci-pc.h"
  25 #include "libqos/virtio-pci.h"
  26
  27 #include "libqos/malloc-pc.h"
  28 #include "hw/virtio/virtio-net.h"
  29
  30 #include "standard-headers/linux/vhost_types.h"
  31 #include "standard-headers/linux/virtio_ids.h"
  32 #include "standard-headers/linux/virtio_net.h"
  33
  34 #ifdef CONFIG_LINUX
  35 #include <sys/vfs.h>
  36 #endif
  37
  38
  39 #define QEMU_CMD_MEM    " -m %d -object memory-backend-file,id=mem,size=%dM," \
  40                         "mem-path=%s,share=on -numa node,memdev=mem"
  41 #define QEMU_CMD_MEMFD  " -m %d -object memory-backend-memfd,id=mem,size=%dM," \
  42                         " -numa node,memdev=mem"
  43 #define QEMU_CMD_CHR    " -chardev socket,id=%s,path=%s%s"
  44 #define QEMU_CMD_NETDEV " -netdev vhost-user,id=hs0,chardev=%s,vhostforce"
  45
  46 #define HUGETLBFS_MAGIC       0x958458f6
  47
  48 /*********** FROM hw/virtio/vhost-user.c *************************************/
  49
  50 #define VHOST_MEMORY_MAX_NREGIONS    8
  51 #define VHOST_MAX_VIRTQUEUES    0x100
  52
  53 #define VHOST_USER_F_PROTOCOL_FEATURES 30
  54 #define VHOST_USER_PROTOCOL_F_MQ 0
  55 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
  56 #define VHOST_USER_PROTOCOL_F_CROSS_ENDIAN   6
  57
  58 #define VHOST_LOG_PAGE 0x1000
  59
  60 typedef enum VhostUserRequest {
  61     VHOST_USER_NONE = 0,
  62     VHOST_USER_GET_FEATURES = 1,
  63     VHOST_USER_SET_FEATURES = 2,
  64     VHOST_USER_SET_OWNER = 3,
  65     VHOST_USER_RESET_OWNER = 4,
  66     VHOST_USER_SET_MEM_TABLE = 5,
  67     VHOST_USER_SET_LOG_BASE = 6,
  68     VHOST_USER_SET_LOG_FD = 7,
  69     VHOST_USER_SET_VRING_NUM = 8,
  70     VHOST_USER_SET_VRING_ADDR = 9,
  71     VHOST_USER_SET_VRING_BASE = 10,
  72     VHOST_USER_GET_VRING_BASE = 11,
  73     VHOST_USER_SET_VRING_KICK = 12,
  74     VHOST_USER_SET_VRING_CALL = 13,
  75     VHOST_USER_SET_VRING_ERR = 14,
  76     VHOST_USER_GET_PROTOCOL_FEATURES = 15,
  77     VHOST_USER_SET_PROTOCOL_FEATURES = 16,
  78     VHOST_USER_GET_QUEUE_NUM = 17,
  79     VHOST_USER_SET_VRING_ENABLE = 18,
  80     VHOST_USER_MAX
  81 } VhostUserRequest;
  82
  83 typedef struct VhostUserMemoryRegion {
  84     uint64_t guest_phys_addr;
  85     uint64_t memory_size;
  86     uint64_t userspace_addr;
  87     uint64_t mmap_offset;
  88 } VhostUserMemoryRegion;
  89
  90 typedef struct VhostUserMemory {
  91     uint32_t nregions;
  92     uint32_t padding;
  93     VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
  94 } VhostUserMemory;
  95
  96 typedef struct VhostUserLog {
  97     uint64_t mmap_size;
  98     uint64_t mmap_offset;
  99 } VhostUserLog;
 100
 101 typedef struct VhostUserMsg {
 102     VhostUserRequest request;
 103
 104 #define VHOST_USER_VERSION_MASK     (0x3)
 105 #define VHOST_USER_REPLY_MASK       (0x1<<2)
 106     uint32_t flags;
 107     uint32_t size; /* the following payload size */
 108     union {
 109 #define VHOST_USER_VRING_IDX_MASK   (0xff)
 110 #define VHOST_USER_VRING_NOFD_MASK  (0x1<<8)
 111         uint64_t u64;
 112         struct vhost_vring_state state;
 113         struct vhost_vring_addr addr;
 114         VhostUserMemory memory;
 115         VhostUserLog log;
 116     } payload;
 117 } QEMU_PACKED VhostUserMsg;
 118
 119 static VhostUserMsg m __attribute__ ((unused));
 120 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
 121                             + sizeof(m.flags) \
 122                             + sizeof(m.size))
 123
 124 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
 125
 126 /* The version of the protocol we support */
 127 #define VHOST_USER_VERSION    (0x1)
 128 /*****************************************************************************/
 129
 130 enum {
 131     TEST_FLAGS_OK,
 132     TEST_FLAGS_DISCONNECT,
 133     TEST_FLAGS_BAD,
 134     TEST_FLAGS_END,
 135 };
 136
 137 typedef struct TestServer {
 138     gchar *socket_path;
 139     gchar *mig_path;
 140     gchar *chr_name;
 141     gchar *tmpfs;
 142     CharBackend chr;
 143     int fds_num;
 144     int fds[VHOST_MEMORY_MAX_NREGIONS];
 145     VhostUserMemory memory;
 146     GMainContext *context;
 147     GMainLoop *loop;
 148     GThread *thread;
 149     GMutex data_mutex;
 150     GCond data_cond;
 151     int log_fd;
 152     uint64_t rings;
 153     bool test_fail;
 154     int test_flags;
 155     int queues;
 156 } TestServer;
 157
 158 static const char *init_hugepagefs(void);
 159 static TestServer *test_server_new(const gchar *name);
 160 static void test_server_free(TestServer *server);
 161 static void test_server_listen(TestServer *server);
 162
 163 enum test_memfd {
 164     TEST_MEMFD_AUTO,
 165     TEST_MEMFD_YES,
 166     TEST_MEMFD_NO,
 167 };
 168
 169 static void append_vhost_opts(TestServer *s, GString *cmd_line,
 170                              const char *chr_opts)
 171 {
 172     g_string_append_printf(cmd_line, QEMU_CMD_CHR QEMU_CMD_NETDEV,
 173                            s->chr_name, s->socket_path,
 174                            chr_opts, s->chr_name);
 175 }
 176
 177 static void append_mem_opts(TestServer *server, GString *cmd_line,
 178                             int size, enum test_memfd memfd)
 179 {
 180     if (memfd == TEST_MEMFD_AUTO) {
 181         memfd = qemu_memfd_check(MFD_ALLOW_SEALING) ? TEST_MEMFD_YES
 182                                                     : TEST_MEMFD_NO;
 183     }
 184
 185     if (memfd == TEST_MEMFD_YES) {
 186         g_string_append_printf(cmd_line, QEMU_CMD_MEMFD, size, size);
 187     } else {
 188         const char *root = init_hugepagefs() ? : server->tmpfs;
 189
 190         g_string_append_printf(cmd_line, QEMU_CMD_MEM, size, size, root);
 191     }
 192 }
 193
 194 static bool wait_for_fds(TestServer *s)
 195 {
 196     gint64 end_time;
 197     bool got_region;
 198     int i;
 199
 200     g_mutex_lock(&s->data_mutex);
 201
 202     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 203     while (!s->fds_num) {
 204         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 205             /* timeout has passed */
 206             g_assert(s->fds_num);
 207             break;
 208         }
 209     }
 210
 211     /* check for sanity */
 212     g_assert_cmpint(s->fds_num, >, 0);
 213     g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
 214
 215     g_mutex_unlock(&s->data_mutex);
 216
 217     got_region = false;
 218     for (i = 0; i < s->memory.nregions; ++i) {
 219         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 220         if (reg->guest_phys_addr == 0) {
 221             got_region = true;
 222             break;
 223         }
 224     }
 225     if (!got_region) {
 226         g_test_skip("No memory at address 0x0");
 227     }
 228     return got_region;
 229 }
 230
 231 static void read_guest_mem_server(QTestState *qts, TestServer *s)
 232 {
 233     uint8_t *guest_mem;
 234     int i, j;
 235     size_t size;
 236
 237     g_mutex_lock(&s->data_mutex);
 238
 239     /* iterate all regions */
 240     for (i = 0; i < s->fds_num; i++) {
 241
 242         /* We'll check only the region statring at 0x0*/
 243         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 244             continue;
 245         }
 246
 247         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 248
 249         size = s->memory.regions[i].memory_size +
 250             s->memory.regions[i].mmap_offset;
 251
 252         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 253                          MAP_SHARED, s->fds[i], 0);
 254
 255         g_assert(guest_mem != MAP_FAILED);
 256         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 257
 258         for (j = 0; j < 1024; j++) {
 259             uint32_t a = qtest_readb(qts, s->memory.regions[i].guest_phys_addr + j);
 260             uint32_t b = guest_mem[j];
 261
 262             g_assert_cmpint(a, ==, b);
 263         }
 264
 265         munmap(guest_mem, s->memory.regions[i].memory_size);
 266     }
 267
 268     g_mutex_unlock(&s->data_mutex);
 269 }
 270
 271 static void *thread_function(void *data)
 272 {
 273     GMainLoop *loop = data;
 274     g_main_loop_run(loop);
 275     return NULL;
 276 }
 277
 278 static int chr_can_read(void *opaque)
 279 {
 280     return VHOST_USER_HDR_SIZE;
 281 }
 282
 283 static void chr_read(void *opaque, const uint8_t *buf, int size)
 284 {
 285     TestServer *s = opaque;
 286     CharBackend *chr = &s->chr;
 287     VhostUserMsg msg;
 288     uint8_t *p = (uint8_t *) &msg;
 289     int fd = -1;
 290
 291     if (s->test_fail) {
 292         qemu_chr_fe_disconnect(chr);
 293         /* now switch to non-failure */
 294         s->test_fail = false;
 295     }
 296
 297     if (size != VHOST_USER_HDR_SIZE) {
 298         g_test_message("Wrong message size received %d", size);
 299         return;
 300     }
 301
 302     g_mutex_lock(&s->data_mutex);
 303     memcpy(p, buf, VHOST_USER_HDR_SIZE);
 304
 305     if (msg.size) {
 306         p += VHOST_USER_HDR_SIZE;
 307         size = qemu_chr_fe_read_all(chr, p, msg.size);
 308         if (size != msg.size) {
 309             g_test_message("Wrong message size received %d != %d",
 310                            size, msg.size);
 311             return;
 312         }
 313     }
 314
 315     switch (msg.request) {
 316     case VHOST_USER_GET_FEATURES:
 317         /* send back features to qemu */
 318         msg.flags |= VHOST_USER_REPLY_MASK;
 319         msg.size = sizeof(m.payload.u64);
 320         msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
 321             0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 322         if (s->queues > 1) {
 323             msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
 324         }
 325         if (s->test_flags >= TEST_FLAGS_BAD) {
 326             msg.payload.u64 = 0;
 327             s->test_flags = TEST_FLAGS_END;
 328         }
 329         p = (uint8_t *) &msg;
 330         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 331         break;
 332
 333     case VHOST_USER_SET_FEATURES:
 334         g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
 335                         !=, 0ULL);
 336         if (s->test_flags == TEST_FLAGS_DISCONNECT) {
 337             qemu_chr_fe_disconnect(chr);
 338             s->test_flags = TEST_FLAGS_BAD;
 339         }
 340         break;
 341
 342     case VHOST_USER_GET_PROTOCOL_FEATURES:
 343         /* send back features to qemu */
 344         msg.flags |= VHOST_USER_REPLY_MASK;
 345         msg.size = sizeof(m.payload.u64);
 346         msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
 347         msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_CROSS_ENDIAN;
 348         if (s->queues > 1) {
 349             msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
 350         }
 351         p = (uint8_t *) &msg;
 352         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 353         break;
 354
 355     case VHOST_USER_GET_VRING_BASE:
 356         /* send back vring base to qemu */
 357         msg.flags |= VHOST_USER_REPLY_MASK;
 358         msg.size = sizeof(m.payload.state);
 359         msg.payload.state.num = 0;
 360         p = (uint8_t *) &msg;
 361         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 362
 363         assert(msg.payload.state.index < s->queues * 2);
 364         s->rings &= ~(0x1ULL << msg.payload.state.index);
 365         g_cond_broadcast(&s->data_cond);
 366         break;
 367
 368     case VHOST_USER_SET_MEM_TABLE:
 369         /* received the mem table */
 370         memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
 371         s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds,
 372                                             G_N_ELEMENTS(s->fds));
 373
 374         /* signal the test that it can continue */
 375         g_cond_broadcast(&s->data_cond);
 376         break;
 377
 378     case VHOST_USER_SET_VRING_KICK:
 379     case VHOST_USER_SET_VRING_CALL:
 380         /* consume the fd */
 381         qemu_chr_fe_get_msgfds(chr, &fd, 1);
 382         /*
 383          * This is a non-blocking eventfd.
 384          * The receive function forces it to be blocking,
 385          * so revert it back to non-blocking.
 386          */
 387         qemu_set_nonblock(fd);
 388         break;
 389
 390     case VHOST_USER_SET_LOG_BASE:
 391         if (s->log_fd != -1) {
 392             close(s->log_fd);
 393             s->log_fd = -1;
 394         }
 395         qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
 396         msg.flags |= VHOST_USER_REPLY_MASK;
 397         msg.size = 0;
 398         p = (uint8_t *) &msg;
 399         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
 400
 401         g_cond_broadcast(&s->data_cond);
 402         break;
 403
 404     case VHOST_USER_SET_VRING_BASE:
 405         assert(msg.payload.state.index < s->queues * 2);
 406         s->rings |= 0x1ULL << msg.payload.state.index;
 407         g_cond_broadcast(&s->data_cond);
 408         break;
 409
 410     case VHOST_USER_GET_QUEUE_NUM:
 411         msg.flags |= VHOST_USER_REPLY_MASK;
 412         msg.size = sizeof(m.payload.u64);
 413         msg.payload.u64 = s->queues;
 414         p = (uint8_t *) &msg;
 415         qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
 416         break;
 417
 418     default:
 419         break;
 420     }
 421
 422     g_mutex_unlock(&s->data_mutex);
 423 }
 424
 425 static const char *init_hugepagefs(void)
 426 {
 427 #ifdef CONFIG_LINUX
 428     static const char *hugepagefs;
 429     const char *path = getenv("QTEST_HUGETLBFS_PATH");
 430     struct statfs fs;
 431     int ret;
 432
 433     if (hugepagefs) {
 434         return hugepagefs;
 435     }
 436     if (!path) {
 437         return NULL;
 438     }
 439
 440     if (access(path, R_OK | W_OK | X_OK)) {
 441         g_test_message("access on path (%s): %s", path, strerror(errno));
 442         g_test_fail();
 443         return NULL;
 444     }
 445
 446     do {
 447         ret = statfs(path, &fs);
 448     } while (ret != 0 && errno == EINTR);
 449
 450     if (ret != 0) {
 451         g_test_message("statfs on path (%s): %s", path, strerror(errno));
 452         g_test_fail();
 453         return NULL;
 454     }
 455
 456     if (fs.f_type != HUGETLBFS_MAGIC) {
 457         g_test_message("Warning: path not on HugeTLBFS: %s", path);
 458         g_test_fail();
 459         return NULL;
 460     }
 461
 462     hugepagefs = path;
 463     return hugepagefs;
 464 #else
 465     return NULL;
 466 #endif
 467 }
 468
 469 static TestServer *test_server_new(const gchar *name)
 470 {
 471     TestServer *server = g_new0(TestServer, 1);
 472     char template[] = "/tmp/vhost-test-XXXXXX";
 473     const char *tmpfs;
 474
 475     server->context = g_main_context_new();
 476     server->loop = g_main_loop_new(server->context, FALSE);
 477
 478     /* run the main loop thread so the chardev may operate */
 479     server->thread = g_thread_new(NULL, thread_function, server->loop);
 480
 481     tmpfs = mkdtemp(template);
 482     if (!tmpfs) {
 483         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
 484     }
 485     g_assert(tmpfs);
 486
 487     server->tmpfs = g_strdup(tmpfs);
 488     server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
 489     server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
 490     server->chr_name = g_strdup_printf("chr-%s", name);
 491
 492     g_mutex_init(&server->data_mutex);
 493     g_cond_init(&server->data_cond);
 494
 495     server->log_fd = -1;
 496     server->queues = 1;
 497
 498     return server;
 499 }
 500
 501 static void chr_event(void *opaque, int event)
 502 {
 503     TestServer *s = opaque;
 504
 505     if (s->test_flags == TEST_FLAGS_END &&
 506         event == CHR_EVENT_CLOSED) {
 507         s->test_flags = TEST_FLAGS_OK;
 508     }
 509 }
 510
 511 static void test_server_create_chr(TestServer *server, const gchar *opt)
 512 {
 513     gchar *chr_path;
 514     Chardev *chr;
 515
 516     chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
 517     chr = qemu_chr_new(server->chr_name, chr_path, server->context);
 518     g_free(chr_path);
 519
 520     g_assert_nonnull(chr);
 521     qemu_chr_fe_init(&server->chr, chr, &error_abort);
 522     qemu_chr_fe_set_handlers(&server->chr, chr_can_read, chr_read,
 523                              chr_event, NULL, server, server->context, true);
 524 }
 525
 526 static void test_server_listen(TestServer *server)
 527 {
 528     test_server_create_chr(server, ",server,nowait");
 529 }
 530
 531 static void test_server_free(TestServer *server)
 532 {
 533     int i, ret;
 534
 535     /* finish the helper thread and dispatch pending sources */
 536     g_main_loop_quit(server->loop);
 537     g_thread_join(server->thread);
 538     while (g_main_context_pending(NULL)) {
 539         g_main_context_iteration(NULL, TRUE);
 540     }
 541
 542     unlink(server->socket_path);
 543     g_free(server->socket_path);
 544
 545     unlink(server->mig_path);
 546     g_free(server->mig_path);
 547
 548     ret = rmdir(server->tmpfs);
 549     if (ret != 0) {
 550         g_test_message("unable to rmdir: path (%s): %s",
 551                        server->tmpfs, strerror(errno));
 552     }
 553     g_free(server->tmpfs);
 554
 555     qemu_chr_fe_deinit(&server->chr, true);
 556
 557     for (i = 0; i < server->fds_num; i++) {
 558         close(server->fds[i]);
 559     }
 560
 561     if (server->log_fd != -1) {
 562         close(server->log_fd);
 563     }
 564
 565     g_free(server->chr_name);
 566
 567     g_main_loop_unref(server->loop);
 568     g_main_context_unref(server->context);
 569     g_cond_clear(&server->data_cond);
 570     g_mutex_clear(&server->data_mutex);
 571     g_free(server);
 572 }
 573
 574 static void wait_for_log_fd(TestServer *s)
 575 {
 576     gint64 end_time;
 577
 578     g_mutex_lock(&s->data_mutex);
 579     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 580     while (s->log_fd == -1) {
 581         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 582             /* timeout has passed */
 583             g_assert(s->log_fd != -1);
 584             break;
 585         }
 586     }
 587
 588     g_mutex_unlock(&s->data_mutex);
 589 }
 590
 591 static void write_guest_mem(TestServer *s, uint32_t seed)
 592 {
 593     uint32_t *guest_mem;
 594     int i, j;
 595     size_t size;
 596
 597     /* iterate all regions */
 598     for (i = 0; i < s->fds_num; i++) {
 599
 600         /* We'll write only the region statring at 0x0 */
 601         if (s->memory.regions[i].guest_phys_addr != 0x0) {
 602             continue;
 603         }
 604
 605         g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
 606
 607         size = s->memory.regions[i].memory_size +
 608             s->memory.regions[i].mmap_offset;
 609
 610         guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
 611                          MAP_SHARED, s->fds[i], 0);
 612
 613         g_assert(guest_mem != MAP_FAILED);
 614         guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
 615
 616         for (j = 0; j < 256; j++) {
 617             guest_mem[j] = seed + j;
 618         }
 619
 620         munmap(guest_mem, s->memory.regions[i].memory_size);
 621         break;
 622     }
 623 }
 624
 625 static guint64 get_log_size(TestServer *s)
 626 {
 627     guint64 log_size = 0;
 628     int i;
 629
 630     for (i = 0; i < s->memory.nregions; ++i) {
 631         VhostUserMemoryRegion *reg = &s->memory.regions[i];
 632         guint64 last = range_get_last(reg->guest_phys_addr,
 633                                        reg->memory_size);
 634         log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
 635     }
 636
 637     return log_size;
 638 }
 639
 640 typedef struct TestMigrateSource {
 641     GSource source;
 642     TestServer *src;
 643     TestServer *dest;
 644 } TestMigrateSource;
 645
 646 static gboolean
 647 test_migrate_source_check(GSource *source)
 648 {
 649     TestMigrateSource *t = (TestMigrateSource *)source;
 650     gboolean overlap = t->src->rings && t->dest->rings;
 651
 652     g_assert(!overlap);
 653
 654     return FALSE;
 655 }
 656
 657 GSourceFuncs test_migrate_source_funcs = {
 658     .check = test_migrate_source_check,
 659 };
 660
 661 static void vhost_user_test_cleanup(void *s)
 662 {
 663     TestServer *server = s;
 664
 665     qos_invalidate_command_line();
 666     test_server_free(server);
 667 }
 668
 669 static void *vhost_user_test_setup(GString *cmd_line, void *arg)
 670 {
 671     TestServer *server = test_server_new("vhost-user-test");
 672     test_server_listen(server);
 673
 674     append_mem_opts(server, cmd_line, 256, TEST_MEMFD_AUTO);
 675     append_vhost_opts(server, cmd_line, "");
 676
 677     g_test_queue_destroy(vhost_user_test_cleanup, server);
 678
 679     return server;
 680 }
 681
 682 static void *vhost_user_test_setup_memfd(GString *cmd_line, void *arg)
 683 {
 684     TestServer *server = test_server_new("vhost-user-test");
 685     test_server_listen(server);
 686
 687     append_mem_opts(server, cmd_line, 256, TEST_MEMFD_YES);
 688     append_vhost_opts(server, cmd_line, "");
 689
 690     g_test_queue_destroy(vhost_user_test_cleanup, server);
 691
 692     return server;
 693 }
 694
 695 static void test_read_guest_mem(void *obj, void *arg, QGuestAllocator *alloc)
 696 {
 697     TestServer *server = arg;
 698
 699     if (!wait_for_fds(server)) {
 700         return;
 701     }
 702
 703     read_guest_mem_server(global_qtest, server);
 704 }
 705
 706 static void test_migrate(void *obj, void *arg, QGuestAllocator *alloc)
 707 {
 708     TestServer *s = arg;
 709     TestServer *dest = test_server_new("dest");
 710     GString *dest_cmdline = g_string_new(qos_get_current_command_line());
 711     char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
 712     QTestState *to;
 713     GSource *source;
 714     QDict *rsp;
 715     guint8 *log;
 716     guint64 size;
 717
 718     if (!wait_for_fds(s)) {
 719         return;
 720     }
 721
 722     size = get_log_size(s);
 723     g_assert_cmpint(size, ==, (256 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
 724
 725     test_server_listen(dest);
 726     g_string_append_printf(dest_cmdline, " -incoming %s", uri);
 727     append_mem_opts(dest, dest_cmdline, 256, TEST_MEMFD_AUTO);
 728     append_vhost_opts(dest, dest_cmdline, "");
 729     to = qtest_init(dest_cmdline->str);
 730
 731     /* This would be where you call qos_allocate_objects(to, NULL), if you want
 732      * to talk to the QVirtioNet object on the destination.
 733      */
 734
 735     source = g_source_new(&test_migrate_source_funcs,
 736                           sizeof(TestMigrateSource));
 737     ((TestMigrateSource *)source)->src = s;
 738     ((TestMigrateSource *)source)->dest = dest;
 739     g_source_attach(source, s->context);
 740
 741     /* slow down migration to have time to fiddle with log */
 742     /* TODO: qtest could learn to break on some places */
 743     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 744               "'arguments': { 'value': 10 } }");
 745     g_assert(qdict_haskey(rsp, "return"));
 746     qobject_unref(rsp);
 747
 748     rsp = qmp("{ 'execute': 'migrate', 'arguments': { 'uri': %s } }", uri);
 749     g_assert(qdict_haskey(rsp, "return"));
 750     qobject_unref(rsp);
 751
 752     wait_for_log_fd(s);
 753
 754     log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
 755     g_assert(log != MAP_FAILED);
 756
 757     /* modify first page */
 758     write_guest_mem(s, 0x42);
 759     log[0] = 1;
 760     munmap(log, size);
 761
 762     /* speed things up */
 763     rsp = qmp("{ 'execute': 'migrate_set_speed',"
 764               "'arguments': { 'value': 0 } }");
 765     g_assert(qdict_haskey(rsp, "return"));
 766     qobject_unref(rsp);
 767
 768     qmp_eventwait("STOP");
 769     qtest_qmp_eventwait(to, "RESUME");
 770
 771     g_assert(wait_for_fds(dest));
 772     read_guest_mem_server(to, dest);
 773
 774     g_source_destroy(source);
 775     g_source_unref(source);
 776
 777     qtest_quit(to);
 778     test_server_free(dest);
 779     g_free(uri);
 780 }
 781
 782 static void wait_for_rings_started(TestServer *s, size_t count)
 783 {
 784     gint64 end_time;
 785
 786     g_mutex_lock(&s->data_mutex);
 787     end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 788     while (ctpop64(s->rings) != count) {
 789         if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
 790             /* timeout has passed */
 791             g_assert_cmpint(ctpop64(s->rings), ==, count);
 792             break;
 793         }
 794     }
 795
 796     g_mutex_unlock(&s->data_mutex);
 797 }
 798
 799 static inline void test_server_connect(TestServer *server)
 800 {
 801     test_server_create_chr(server, ",reconnect=1");
 802 }
 803
 804 static gboolean
 805 reconnect_cb(gpointer user_data)
 806 {
 807     TestServer *s = user_data;
 808
 809     qemu_chr_fe_disconnect(&s->chr);
 810
 811     return FALSE;
 812 }
 813
 814 static gpointer
 815 connect_thread(gpointer data)
 816 {
 817     TestServer *s = data;
 818
 819     /* wait for qemu to start before first try, to avoid extra warnings */
 820     g_usleep(G_USEC_PER_SEC);
 821     test_server_connect(s);
 822
 823     return NULL;
 824 }
 825
 826 static void *vhost_user_test_setup_reconnect(GString *cmd_line, void *arg)
 827 {
 828     TestServer *s = test_server_new("reconnect");
 829
 830     g_thread_new("connect", connect_thread, s);
 831     append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
 832     append_vhost_opts(s, cmd_line, ",server");
 833
 834     g_test_queue_destroy(vhost_user_test_cleanup, s);
 835
 836     return s;
 837 }
 838
 839 static void test_reconnect(void *obj, void *arg, QGuestAllocator *alloc)
 840 {
 841     TestServer *s = arg;
 842     GSource *src;
 843
 844     if (!wait_for_fds(s)) {
 845         return;
 846     }
 847
 848     wait_for_rings_started(s, 2);
 849
 850     /* reconnect */
 851     s->fds_num = 0;
 852     s->rings = 0;
 853     src = g_idle_source_new();
 854     g_source_set_callback(src, reconnect_cb, s, NULL);
 855     g_source_attach(src, s->context);
 856     g_source_unref(src);
 857     g_assert(wait_for_fds(s));
 858     wait_for_rings_started(s, 2);
 859 }
 860
 861 static void *vhost_user_test_setup_connect_fail(GString *cmd_line, void *arg)
 862 {
 863     TestServer *s = test_server_new("connect-fail");
 864
 865     s->test_fail = true;
 866
 867     g_thread_new("connect", connect_thread, s);
 868     append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
 869     append_vhost_opts(s, cmd_line, ",server");
 870
 871     g_test_queue_destroy(vhost_user_test_cleanup, s);
 872
 873     return s;
 874 }
 875
 876 static void *vhost_user_test_setup_flags_mismatch(GString *cmd_line, void *arg)
 877 {
 878     TestServer *s = test_server_new("flags-mismatch");
 879
 880     s->test_flags = TEST_FLAGS_DISCONNECT;
 881
 882     g_thread_new("connect", connect_thread, s);
 883     append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
 884     append_vhost_opts(s, cmd_line, ",server");
 885
 886     g_test_queue_destroy(vhost_user_test_cleanup, s);
 887
 888     return s;
 889 }
 890
 891 static void test_vhost_user_started(void *obj, void *arg, QGuestAllocator *alloc)
 892 {
 893     TestServer *s = arg;
 894
 895     if (!wait_for_fds(s)) {
 896         return;
 897     }
 898     wait_for_rings_started(s, 2);
 899 }
 900
 901 static void *vhost_user_test_setup_multiqueue(GString *cmd_line, void *arg)
 902 {
 903     TestServer *s = vhost_user_test_setup(cmd_line, arg);
 904
 905     s->queues = 2;
 906     g_string_append_printf(cmd_line,
 907                            " -set netdev.hs0.queues=%d"
 908                            " -global virtio-net-pci.vectors=%d",
 909                            s->queues, s->queues * 2 + 2);
 910
 911     return s;
 912 }
 913
 914 static void test_multiqueue(void *obj, void *arg, QGuestAllocator *alloc)
 915 {
 916     TestServer *s = arg;
 917
 918     wait_for_rings_started(s, s->queues * 2);
 919 }
 920
 921 static void register_vhost_user_test(void)
 922 {
 923     QOSGraphTestOptions opts = {
 924         .before = vhost_user_test_setup,
 925         .subprocess = true,
 926     };
 927
 928     qemu_add_opts(&qemu_chardev_opts);
 929
 930     qos_add_test("vhost-user/read-guest-mem/memfile",
 931                  "virtio-net",
 932                  test_read_guest_mem, &opts);
 933
 934     if (qemu_memfd_check(MFD_ALLOW_SEALING)) {
 935         opts.before = vhost_user_test_setup_memfd;
 936         qos_add_test("vhost-user/read-guest-mem/memfd",
 937                      "virtio-net",
 938                      test_read_guest_mem, &opts);
 939     }
 940
 941     qos_add_test("vhost-user/migrate",
 942                  "virtio-net",
 943                  test_migrate, &opts);
 944
 945     /* keeps failing on build-system since Aug 15 2017 */
 946     if (getenv("QTEST_VHOST_USER_FIXME")) {
 947         opts.before = vhost_user_test_setup_reconnect;
 948         qos_add_test("vhost-user/reconnect", "virtio-net",
 949                      test_reconnect, &opts);
 950
 951         opts.before = vhost_user_test_setup_connect_fail;
 952         qos_add_test("vhost-user/connect-fail", "virtio-net",
 953                      test_vhost_user_started, &opts);
 954
 955         opts.before = vhost_user_test_setup_flags_mismatch;
 956         qos_add_test("vhost-user/flags-mismatch", "virtio-net",
 957                      test_vhost_user_started, &opts);
 958     }
 959
 960     opts.before = vhost_user_test_setup_multiqueue;
 961     opts.edge.extra_device_opts = "mq=on";
 962     qos_add_test("vhost-user/multiqueue",
 963                  "virtio-net",
 964                  test_multiqueue, &opts);
 965 }
 966 libqos_init(register_vhost_user_test);