tests/virtio-9p-test.c

   1 /*
   2  * QTest testcase for VirtIO 9P
   3  *
   4  * Copyright (c) 2014 SUSE LINUX Products GmbH
   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 #include "qemu/osdep.h"
  11 #include "libqtest.h"
  12 #include "qemu-common.h"
  13 #include "libqos/libqos-pc.h"
  14 #include "libqos/libqos-spapr.h"
  15 #include "libqos/virtio.h"
  16 #include "libqos/virtio-pci.h"
  17 #include "standard-headers/linux/virtio_ids.h"
  18 #include "standard-headers/linux/virtio_pci.h"
  19 #include "hw/9pfs/9p.h"
  20 #include "hw/9pfs/9p-synth.h"
  21
  22 #define QVIRTIO_9P_TIMEOUT_US (10 * 1000 * 1000)
  23
  24 static const char mount_tag[] = "qtest";
  25
  26 typedef struct {
  27     QVirtioDevice *dev;
  28     QOSState *qs;
  29     QVirtQueue *vq;
  30 } QVirtIO9P;
  31
  32 static QVirtIO9P *qvirtio_9p_start(const char *driver)
  33 {
  34     const char *arch = qtest_get_arch();
  35     const char *cmd = "-fsdev synth,id=fsdev0 "
  36                       "-device %s,fsdev=fsdev0,mount_tag=%s";
  37     QVirtIO9P *v9p = g_new0(QVirtIO9P, 1);
  38
  39     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
  40         v9p->qs = qtest_pc_boot(cmd, driver, mount_tag);
  41     } else if (strcmp(arch, "ppc64") == 0) {
  42         v9p->qs = qtest_spapr_boot(cmd, driver, mount_tag);
  43     } else {
  44         g_printerr("virtio-9p tests are only available on x86 or ppc64\n");
  45         exit(EXIT_FAILURE);
  46     }
  47
  48     return v9p;
  49 }
  50
  51 static void qvirtio_9p_stop(QVirtIO9P *v9p)
  52 {
  53     qtest_shutdown(v9p->qs);
  54     g_free(v9p);
  55 }
  56
  57 static QVirtIO9P *qvirtio_9p_pci_start(void)
  58 {
  59     QVirtIO9P *v9p = qvirtio_9p_start("virtio-9p-pci");
  60     QVirtioPCIDevice *dev = qvirtio_pci_device_find(v9p->qs->pcibus,
  61                                                     VIRTIO_ID_9P);
  62     g_assert_nonnull(dev);
  63     g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_9P);
  64     v9p->dev = (QVirtioDevice *) dev;
  65
  66     qvirtio_pci_device_enable(dev);
  67     qvirtio_reset(v9p->dev);
  68     qvirtio_set_acknowledge(v9p->dev);
  69     qvirtio_set_driver(v9p->dev);
  70
  71     v9p->vq = qvirtqueue_setup(v9p->dev, v9p->qs->alloc, 0);
  72
  73     qvirtio_set_driver_ok(v9p->dev);
  74
  75     return v9p;
  76 }
  77
  78 static void qvirtio_9p_pci_stop(QVirtIO9P *v9p)
  79 {
  80     qvirtqueue_cleanup(v9p->dev->bus, v9p->vq, v9p->qs->alloc);
  81     qvirtio_pci_device_disable(container_of(v9p->dev, QVirtioPCIDevice, vdev));
  82     qvirtio_pci_device_free((QVirtioPCIDevice *)v9p->dev);
  83     qvirtio_9p_stop(v9p);
  84 }
  85
  86 static void pci_config(QVirtIO9P *v9p)
  87 {
  88     size_t tag_len = qvirtio_config_readw(v9p->dev, 0);
  89     char *tag;
  90     int i;
  91
  92     g_assert_cmpint(tag_len, ==, strlen(mount_tag));
  93
  94     tag = g_malloc(tag_len);
  95     for (i = 0; i < tag_len; i++) {
  96         tag[i] = qvirtio_config_readb(v9p->dev, i + 2);
  97     }
  98     g_assert_cmpmem(tag, tag_len, mount_tag, tag_len);
  99     g_free(tag);
 100 }
 101
 102 #define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */
 103
 104 typedef struct {
 105     QVirtIO9P *v9p;
 106     uint16_t tag;
 107     uint64_t t_msg;
 108     uint32_t t_size;
 109     uint64_t r_msg;
 110     /* No r_size, it is hardcoded to P9_MAX_SIZE */
 111     size_t t_off;
 112     size_t r_off;
 113     uint32_t free_head;
 114 } P9Req;
 115
 116 static void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
 117 {
 118     memwrite(req->t_msg + req->t_off, addr, len);
 119     req->t_off += len;
 120 }
 121
 122 static void v9fs_memskip(P9Req *req, size_t len)
 123 {
 124     req->r_off += len;
 125 }
 126
 127 static void v9fs_memread(P9Req *req, void *addr, size_t len)
 128 {
 129     memread(req->r_msg + req->r_off, addr, len);
 130     req->r_off += len;
 131 }
 132
 133 static void v9fs_uint16_write(P9Req *req, uint16_t val)
 134 {
 135     uint16_t le_val = cpu_to_le16(val);
 136
 137     v9fs_memwrite(req, &le_val, 2);
 138 }
 139
 140 static void v9fs_uint16_read(P9Req *req, uint16_t *val)
 141 {
 142     v9fs_memread(req, val, 2);
 143     le16_to_cpus(val);
 144 }
 145
 146 static void v9fs_uint32_write(P9Req *req, uint32_t val)
 147 {
 148     uint32_t le_val = cpu_to_le32(val);
 149
 150     v9fs_memwrite(req, &le_val, 4);
 151 }
 152
 153 static void v9fs_uint64_write(P9Req *req, uint64_t val)
 154 {
 155     uint64_t le_val = cpu_to_le64(val);
 156
 157     v9fs_memwrite(req, &le_val, 8);
 158 }
 159
 160 static void v9fs_uint32_read(P9Req *req, uint32_t *val)
 161 {
 162     v9fs_memread(req, val, 4);
 163     le32_to_cpus(val);
 164 }
 165
 166 /* len[2] string[len] */
 167 static uint16_t v9fs_string_size(const char *string)
 168 {
 169     size_t len = strlen(string);
 170
 171     g_assert_cmpint(len, <=, UINT16_MAX - 2);
 172
 173     return 2 + len;
 174 }
 175
 176 static void v9fs_string_write(P9Req *req, const char *string)
 177 {
 178     int len = strlen(string);
 179
 180     g_assert_cmpint(len, <=, UINT16_MAX);
 181
 182     v9fs_uint16_write(req, (uint16_t) len);
 183     v9fs_memwrite(req, string, len);
 184 }
 185
 186 static void v9fs_string_read(P9Req *req, uint16_t *len, char **string)
 187 {
 188     uint16_t local_len;
 189
 190     v9fs_uint16_read(req, &local_len);
 191     if (len) {
 192         *len = local_len;
 193     }
 194     if (string) {
 195         *string = g_malloc(local_len);
 196         v9fs_memread(req, *string, local_len);
 197     } else {
 198         v9fs_memskip(req, local_len);
 199     }
 200 }
 201
 202  typedef struct {
 203     uint32_t size;
 204     uint8_t id;
 205     uint16_t tag;
 206 } QEMU_PACKED P9Hdr;
 207
 208 static P9Req *v9fs_req_init(QVirtIO9P *v9p, uint32_t size, uint8_t id,
 209                             uint16_t tag)
 210 {
 211     P9Req *req = g_new0(P9Req, 1);
 212     uint32_t total_size = 7; /* 9P header has well-known size of 7 bytes */
 213     P9Hdr hdr = {
 214         .id = id,
 215         .tag = cpu_to_le16(tag)
 216     };
 217
 218     g_assert_cmpint(total_size, <=, UINT32_MAX - size);
 219     total_size += size;
 220     hdr.size = cpu_to_le32(total_size);
 221
 222     g_assert_cmpint(total_size, <=, P9_MAX_SIZE);
 223
 224     req->v9p = v9p;
 225     req->t_size = total_size;
 226     req->t_msg = guest_alloc(v9p->qs->alloc, req->t_size);
 227     v9fs_memwrite(req, &hdr, 7);
 228     req->tag = tag;
 229     return req;
 230 }
 231
 232 static void v9fs_req_send(P9Req *req)
 233 {
 234     QVirtIO9P *v9p = req->v9p;
 235
 236     req->r_msg = guest_alloc(v9p->qs->alloc, P9_MAX_SIZE);
 237     req->free_head = qvirtqueue_add(v9p->vq, req->t_msg, req->t_size, false,
 238                                     true);
 239     qvirtqueue_add(v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
 240     qvirtqueue_kick(v9p->dev, v9p->vq, req->free_head);
 241     req->t_off = 0;
 242 }
 243
 244 static const char *rmessage_name(uint8_t id)
 245 {
 246     return
 247         id == P9_RLERROR ? "RLERROR" :
 248         id == P9_RVERSION ? "RVERSION" :
 249         id == P9_RATTACH ? "RATTACH" :
 250         id == P9_RWALK ? "RWALK" :
 251         id == P9_RLOPEN ? "RLOPEN" :
 252         id == P9_RWRITE ? "RWRITE" :
 253         id == P9_RFLUSH ? "RFLUSH" :
 254         "<unknown>";
 255 }
 256
 257 static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 258 {
 259     QVirtIO9P *v9p = req->v9p;
 260
 261     qvirtio_wait_used_elem(v9p->dev, v9p->vq, req->free_head, len,
 262                            QVIRTIO_9P_TIMEOUT_US);
 263 }
 264
 265 static void v9fs_req_recv(P9Req *req, uint8_t id)
 266 {
 267     P9Hdr hdr;
 268
 269     v9fs_memread(req, &hdr, 7);
 270     hdr.size = ldl_le_p(&hdr.size);
 271     hdr.tag = lduw_le_p(&hdr.tag);
 272
 273     g_assert_cmpint(hdr.size, >=, 7);
 274     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 275     g_assert_cmpint(hdr.tag, ==, req->tag);
 276
 277     if (hdr.id != id) {
 278         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 279                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 280
 281         if (hdr.id == P9_RLERROR) {
 282             uint32_t err;
 283             v9fs_uint32_read(req, &err);
 284             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 285         }
 286     }
 287     g_assert_cmpint(hdr.id, ==, id);
 288 }
 289
 290 static void v9fs_req_free(P9Req *req)
 291 {
 292     QVirtIO9P *v9p = req->v9p;
 293
 294     guest_free(v9p->qs->alloc, req->t_msg);
 295     guest_free(v9p->qs->alloc, req->r_msg);
 296     g_free(req);
 297 }
 298
 299 /* size[4] Rlerror tag[2] ecode[4] */
 300 static void v9fs_rlerror(P9Req *req, uint32_t *err)
 301 {
 302     v9fs_req_recv(req, P9_RLERROR);
 303     v9fs_uint32_read(req, err);
 304     v9fs_req_free(req);
 305 }
 306
 307 /* size[4] Tversion tag[2] msize[4] version[s] */
 308 static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version,
 309                             uint16_t tag)
 310 {
 311     P9Req *req;
 312     uint32_t body_size = 4;
 313     uint16_t string_size = v9fs_string_size(version);
 314
 315     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 316     body_size += string_size;
 317     req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
 318
 319     v9fs_uint32_write(req, msize);
 320     v9fs_string_write(req, version);
 321     v9fs_req_send(req);
 322     return req;
 323 }
 324
 325 /* size[4] Rversion tag[2] msize[4] version[s] */
 326 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 327 {
 328     uint32_t msize;
 329
 330     v9fs_req_recv(req, P9_RVERSION);
 331     v9fs_uint32_read(req, &msize);
 332
 333     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 334
 335     if (len || version) {
 336         v9fs_string_read(req, len, version);
 337     }
 338
 339     v9fs_req_free(req);
 340 }
 341
 342 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 343 static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname,
 344                            uint16_t tag)
 345 {
 346     const char *uname = ""; /* ignored by QEMU */
 347     const char *aname = ""; /* ignored by QEMU */
 348     P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 349
 350     v9fs_uint32_write(req, fid);
 351     v9fs_uint32_write(req, P9_NOFID);
 352     v9fs_string_write(req, uname);
 353     v9fs_string_write(req, aname);
 354     v9fs_uint32_write(req, n_uname);
 355     v9fs_req_send(req);
 356     return req;
 357 }
 358
 359 typedef char v9fs_qid[13];
 360
 361 /* size[4] Rattach tag[2] qid[13] */
 362 static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 363 {
 364     v9fs_req_recv(req, P9_RATTACH);
 365     if (qid) {
 366         v9fs_memread(req, qid, 13);
 367     }
 368     v9fs_req_free(req);
 369 }
 370
 371 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 372 static P9Req *v9fs_twalk(QVirtIO9P *v9p, uint32_t fid, uint32_t newfid,
 373                          uint16_t nwname, char *const wnames[], uint16_t tag)
 374 {
 375     P9Req *req;
 376     int i;
 377     uint32_t body_size = 4 + 4 + 2;
 378
 379     for (i = 0; i < nwname; i++) {
 380         uint16_t wname_size = v9fs_string_size(wnames[i]);
 381
 382         g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 383         body_size += wname_size;
 384     }
 385     req = v9fs_req_init(v9p,  body_size, P9_TWALK, tag);
 386     v9fs_uint32_write(req, fid);
 387     v9fs_uint32_write(req, newfid);
 388     v9fs_uint16_write(req, nwname);
 389     for (i = 0; i < nwname; i++) {
 390         v9fs_string_write(req, wnames[i]);
 391     }
 392     v9fs_req_send(req);
 393     return req;
 394 }
 395
 396 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 397 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 398 {
 399     uint16_t local_nwqid;
 400
 401     v9fs_req_recv(req, P9_RWALK);
 402     v9fs_uint16_read(req, &local_nwqid);
 403     if (nwqid) {
 404         *nwqid = local_nwqid;
 405     }
 406     if (wqid) {
 407         *wqid = g_malloc(local_nwqid * 13);
 408         v9fs_memread(req, *wqid, local_nwqid * 13);
 409     }
 410     v9fs_req_free(req);
 411 }
 412
 413 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 414 static P9Req *v9fs_tlopen(QVirtIO9P *v9p, uint32_t fid, uint32_t flags,
 415                           uint16_t tag)
 416 {
 417     P9Req *req;
 418
 419     req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 420     v9fs_uint32_write(req, fid);
 421     v9fs_uint32_write(req, flags);
 422     v9fs_req_send(req);
 423     return req;
 424 }
 425
 426 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 427 static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 428 {
 429     v9fs_req_recv(req, P9_RLOPEN);
 430     if (qid) {
 431         v9fs_memread(req, qid, 13);
 432     } else {
 433         v9fs_memskip(req, 13);
 434     }
 435     if (iounit) {
 436         v9fs_uint32_read(req, iounit);
 437     }
 438     v9fs_req_free(req);
 439 }
 440
 441 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 442 static P9Req *v9fs_twrite(QVirtIO9P *v9p, uint32_t fid, uint64_t offset,
 443                           uint32_t count, const void *data, uint16_t tag)
 444 {
 445     P9Req *req;
 446     uint32_t body_size = 4 + 8 + 4;
 447
 448     g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 449     body_size += count;
 450     req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 451     v9fs_uint32_write(req, fid);
 452     v9fs_uint64_write(req, offset);
 453     v9fs_uint32_write(req, count);
 454     v9fs_memwrite(req, data, count);
 455     v9fs_req_send(req);
 456     return req;
 457 }
 458
 459 /* size[4] Rwrite tag[2] count[4] */
 460 static void v9fs_rwrite(P9Req *req, uint32_t *count)
 461 {
 462     v9fs_req_recv(req, P9_RWRITE);
 463     if (count) {
 464         v9fs_uint32_read(req, count);
 465     }
 466     v9fs_req_free(req);
 467 }
 468
 469 /* size[4] Tflush tag[2] oldtag[2] */
 470 static P9Req *v9fs_tflush(QVirtIO9P *v9p, uint16_t oldtag, uint16_t tag)
 471 {
 472     P9Req *req;
 473
 474     req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 475     v9fs_uint32_write(req, oldtag);
 476     v9fs_req_send(req);
 477     return req;
 478 }
 479
 480 /* size[4] Rflush tag[2] */
 481 static void v9fs_rflush(P9Req *req)
 482 {
 483     v9fs_req_recv(req, P9_RFLUSH);
 484     v9fs_req_free(req);
 485 }
 486
 487 static void fs_version(QVirtIO9P *v9p)
 488 {
 489     const char *version = "9P2000.L";
 490     uint16_t server_len;
 491     char *server_version;
 492     P9Req *req;
 493
 494     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 495     v9fs_req_wait_for_reply(req, NULL);
 496     v9fs_rversion(req, &server_len, &server_version);
 497
 498     g_assert_cmpmem(server_version, server_len, version, strlen(version));
 499
 500     g_free(server_version);
 501 }
 502
 503 static void fs_attach(QVirtIO9P *v9p)
 504 {
 505     P9Req *req;
 506
 507     fs_version(v9p);
 508     req = v9fs_tattach(v9p, 0, getuid(), 0);
 509     v9fs_req_wait_for_reply(req, NULL);
 510     v9fs_rattach(req, NULL);
 511 }
 512
 513 static void fs_walk(QVirtIO9P *v9p)
 514 {
 515     char *wnames[P9_MAXWELEM];
 516     uint16_t nwqid;
 517     v9fs_qid *wqid;
 518     int i;
 519     P9Req *req;
 520
 521     for (i = 0; i < P9_MAXWELEM; i++) {
 522         wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 523     }
 524
 525     fs_attach(v9p);
 526     req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 527     v9fs_req_wait_for_reply(req, NULL);
 528     v9fs_rwalk(req, &nwqid, &wqid);
 529
 530     g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 531
 532     for (i = 0; i < P9_MAXWELEM; i++) {
 533         g_free(wnames[i]);
 534     }
 535
 536     g_free(wqid);
 537 }
 538
 539 static void fs_walk_no_slash(QVirtIO9P *v9p)
 540 {
 541     char *const wnames[] = { g_strdup(" /") };
 542     P9Req *req;
 543     uint32_t err;
 544
 545     fs_attach(v9p);
 546     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 547     v9fs_req_wait_for_reply(req, NULL);
 548     v9fs_rlerror(req, &err);
 549
 550     g_assert_cmpint(err, ==, ENOENT);
 551
 552     g_free(wnames[0]);
 553 }
 554
 555 static void fs_walk_dotdot(QVirtIO9P *v9p)
 556 {
 557     char *const wnames[] = { g_strdup("..") };
 558     v9fs_qid root_qid, *wqid;
 559     P9Req *req;
 560
 561     fs_version(v9p);
 562     req = v9fs_tattach(v9p, 0, getuid(), 0);
 563     v9fs_req_wait_for_reply(req, NULL);
 564     v9fs_rattach(req, &root_qid);
 565
 566     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 567     v9fs_req_wait_for_reply(req, NULL);
 568     v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 569
 570     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 571
 572     g_free(wqid);
 573     g_free(wnames[0]);
 574 }
 575
 576 static void fs_lopen(QVirtIO9P *v9p)
 577 {
 578     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
 579     P9Req *req;
 580
 581     fs_attach(v9p);
 582     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 583     v9fs_req_wait_for_reply(req, NULL);
 584     v9fs_rwalk(req, NULL, NULL);
 585
 586     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 587     v9fs_req_wait_for_reply(req, NULL);
 588     v9fs_rlopen(req, NULL, NULL);
 589
 590     g_free(wnames[0]);
 591 }
 592
 593 static void fs_write(QVirtIO9P *v9p)
 594 {
 595     static const uint32_t write_count = P9_MAX_SIZE / 2;
 596     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
 597     char *buf = g_malloc0(write_count);
 598     uint32_t count;
 599     P9Req *req;
 600
 601     fs_attach(v9p);
 602     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 603     v9fs_req_wait_for_reply(req, NULL);
 604     v9fs_rwalk(req, NULL, NULL);
 605
 606     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 607     v9fs_req_wait_for_reply(req, NULL);
 608     v9fs_rlopen(req, NULL, NULL);
 609
 610     req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
 611     v9fs_req_wait_for_reply(req, NULL);
 612     v9fs_rwrite(req, &count);
 613     g_assert_cmpint(count, ==, write_count);
 614
 615     g_free(buf);
 616     g_free(wnames[0]);
 617 }
 618
 619 static void fs_flush_success(QVirtIO9P *v9p)
 620 {
 621     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 622     P9Req *req, *flush_req;
 623     uint32_t reply_len;
 624     uint8_t should_block;
 625
 626     fs_attach(v9p);
 627     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 628     v9fs_req_wait_for_reply(req, NULL);
 629     v9fs_rwalk(req, NULL, NULL);
 630
 631     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 632     v9fs_req_wait_for_reply(req, NULL);
 633     v9fs_rlopen(req, NULL, NULL);
 634
 635     /* This will cause the 9p server to try to write data to the backend,
 636      * until the write request gets cancelled.
 637      */
 638     should_block = 1;
 639     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 640
 641     flush_req = v9fs_tflush(v9p, req->tag, 1);
 642
 643     /* The write request is supposed to be flushed: the server should just
 644      * mark the write request as used and reply to the flush request.
 645      */
 646     v9fs_req_wait_for_reply(req, &reply_len);
 647     g_assert_cmpint(reply_len, ==, 0);
 648     v9fs_req_free(req);
 649     v9fs_rflush(flush_req);
 650
 651     g_free(wnames[0]);
 652 }
 653
 654 static void fs_flush_ignored(QVirtIO9P *v9p)
 655 {
 656     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 657     P9Req *req, *flush_req;
 658     uint32_t count;
 659     uint8_t should_block;
 660
 661     fs_attach(v9p);
 662     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 663     v9fs_req_wait_for_reply(req, NULL);
 664     v9fs_rwalk(req, NULL, NULL);
 665
 666     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 667     v9fs_req_wait_for_reply(req, NULL);
 668     v9fs_rlopen(req, NULL, NULL);
 669
 670     /* This will cause the write request to complete right away, before it
 671      * could be actually cancelled.
 672      */
 673     should_block = 0;
 674     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 675
 676     flush_req = v9fs_tflush(v9p, req->tag, 1);
 677
 678     /* The write request is supposed to complete. The server should
 679      * reply to the write request and the flush request.
 680      */
 681     v9fs_req_wait_for_reply(req, NULL);
 682     v9fs_rwrite(req, &count);
 683     g_assert_cmpint(count, ==, sizeof(should_block));
 684     v9fs_rflush(flush_req);
 685
 686     g_free(wnames[0]);
 687 }
 688
 689 typedef void (*v9fs_test_fn)(QVirtIO9P *v9p);
 690
 691 static void v9fs_run_pci_test(gconstpointer data)
 692 {
 693     v9fs_test_fn fn = data;
 694     QVirtIO9P *v9p = qvirtio_9p_pci_start();
 695
 696     if (fn) {
 697         fn(v9p);
 698     }
 699     qvirtio_9p_pci_stop(v9p);
 700 }
 701
 702 static void v9fs_qtest_pci_add(const char *path, v9fs_test_fn fn)
 703 {
 704     qtest_add_data_func(path, fn, v9fs_run_pci_test);
 705 }
 706
 707 int main(int argc, char **argv)
 708 {
 709     g_test_init(&argc, &argv, NULL);
 710     v9fs_qtest_pci_add("/virtio/9p/pci/nop", NULL);
 711     v9fs_qtest_pci_add("/virtio/9p/pci/config", pci_config);
 712     v9fs_qtest_pci_add("/virtio/9p/pci/fs/version/basic", fs_version);
 713     v9fs_qtest_pci_add("/virtio/9p/pci/fs/attach/basic", fs_attach);
 714     v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/basic", fs_walk);
 715     v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/no_slash", fs_walk_no_slash);
 716     v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/dotdot_from_root",
 717                        fs_walk_dotdot);
 718     v9fs_qtest_pci_add("/virtio/9p/pci/fs/lopen/basic", fs_lopen);
 719     v9fs_qtest_pci_add("/virtio/9p/pci/fs/write/basic", fs_write);
 720     v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/success", fs_flush_success);
 721     v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/ignored", fs_flush_ignored);
 722
 723     return g_test_run();
 724 }