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);
 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 t_size = 7 + size; /* 9P header has well-known size of 7 bytes */
 213     P9Hdr hdr = {
 214         .size = cpu_to_le32(t_size),
 215         .id = id,
 216         .tag = cpu_to_le16(tag)
 217     };
 218
 219     g_assert_cmpint(t_size, <=, P9_MAX_SIZE);
 220
 221     req->v9p = v9p;
 222     req->t_size = t_size;
 223     req->t_msg = guest_alloc(v9p->qs->alloc, req->t_size);
 224     v9fs_memwrite(req, &hdr, 7);
 225     req->tag = tag;
 226     return req;
 227 }
 228
 229 static void v9fs_req_send(P9Req *req)
 230 {
 231     QVirtIO9P *v9p = req->v9p;
 232
 233     req->r_msg = guest_alloc(v9p->qs->alloc, P9_MAX_SIZE);
 234     req->free_head = qvirtqueue_add(v9p->vq, req->t_msg, req->t_size, false,
 235                                     true);
 236     qvirtqueue_add(v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
 237     qvirtqueue_kick(v9p->dev, v9p->vq, req->free_head);
 238     req->t_off = 0;
 239 }
 240
 241 static const char *rmessage_name(uint8_t id)
 242 {
 243     return
 244         id == P9_RLERROR ? "RLERROR" :
 245         id == P9_RVERSION ? "RVERSION" :
 246         id == P9_RATTACH ? "RATTACH" :
 247         id == P9_RWALK ? "RWALK" :
 248         id == P9_RLOPEN ? "RLOPEN" :
 249         id == P9_RWRITE ? "RWRITE" :
 250         id == P9_RFLUSH ? "RFLUSH" :
 251         "<unknown>";
 252 }
 253
 254 static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 255 {
 256     QVirtIO9P *v9p = req->v9p;
 257
 258     qvirtio_wait_used_elem(v9p->dev, v9p->vq, req->free_head, len,
 259                            QVIRTIO_9P_TIMEOUT_US);
 260 }
 261
 262 static void v9fs_req_recv(P9Req *req, uint8_t id)
 263 {
 264     P9Hdr hdr;
 265
 266     v9fs_memread(req, &hdr, 7);
 267     hdr.size = ldl_le_p(&hdr.size);
 268     hdr.tag = lduw_le_p(&hdr.tag);
 269
 270     g_assert_cmpint(hdr.size, >=, 7);
 271     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 272     g_assert_cmpint(hdr.tag, ==, req->tag);
 273
 274     if (hdr.id != id) {
 275         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 276                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 277
 278         if (hdr.id == P9_RLERROR) {
 279             uint32_t err;
 280             v9fs_uint32_read(req, &err);
 281             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 282         }
 283     }
 284     g_assert_cmpint(hdr.id, ==, id);
 285 }
 286
 287 static void v9fs_req_free(P9Req *req)
 288 {
 289     QVirtIO9P *v9p = req->v9p;
 290
 291     guest_free(v9p->qs->alloc, req->t_msg);
 292     guest_free(v9p->qs->alloc, req->r_msg);
 293     g_free(req);
 294 }
 295
 296 /* size[4] Rlerror tag[2] ecode[4] */
 297 static void v9fs_rlerror(P9Req *req, uint32_t *err)
 298 {
 299     v9fs_req_recv(req, P9_RLERROR);
 300     v9fs_uint32_read(req, err);
 301     v9fs_req_free(req);
 302 }
 303
 304 /* size[4] Tversion tag[2] msize[4] version[s] */
 305 static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version,
 306                             uint16_t tag)
 307 {
 308     P9Req *req = v9fs_req_init(v9p, 4 + v9fs_string_size(version), P9_TVERSION,
 309                                tag);
 310
 311     v9fs_uint32_write(req, msize);
 312     v9fs_string_write(req, version);
 313     v9fs_req_send(req);
 314     return req;
 315 }
 316
 317 /* size[4] Rversion tag[2] msize[4] version[s] */
 318 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 319 {
 320     uint32_t msize;
 321
 322     v9fs_req_recv(req, P9_RVERSION);
 323     v9fs_uint32_read(req, &msize);
 324
 325     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 326
 327     if (len || version) {
 328         v9fs_string_read(req, len, version);
 329     }
 330
 331     v9fs_req_free(req);
 332 }
 333
 334 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 335 static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname,
 336                            uint16_t tag)
 337 {
 338     const char *uname = ""; /* ignored by QEMU */
 339     const char *aname = ""; /* ignored by QEMU */
 340     P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 341
 342     v9fs_uint32_write(req, fid);
 343     v9fs_uint32_write(req, P9_NOFID);
 344     v9fs_string_write(req, uname);
 345     v9fs_string_write(req, aname);
 346     v9fs_uint32_write(req, n_uname);
 347     v9fs_req_send(req);
 348     return req;
 349 }
 350
 351 typedef char v9fs_qid[13];
 352
 353 /* size[4] Rattach tag[2] qid[13] */
 354 static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 355 {
 356     v9fs_req_recv(req, P9_RATTACH);
 357     if (qid) {
 358         v9fs_memread(req, qid, 13);
 359     }
 360     v9fs_req_free(req);
 361 }
 362
 363 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 364 static P9Req *v9fs_twalk(QVirtIO9P *v9p, uint32_t fid, uint32_t newfid,
 365                          uint16_t nwname, char *const wnames[], uint16_t tag)
 366 {
 367     P9Req *req;
 368     int i;
 369     uint32_t size = 4 + 4 + 2;
 370
 371     for (i = 0; i < nwname; i++) {
 372         size += v9fs_string_size(wnames[i]);
 373     }
 374     req = v9fs_req_init(v9p,  size, P9_TWALK, tag);
 375     v9fs_uint32_write(req, fid);
 376     v9fs_uint32_write(req, newfid);
 377     v9fs_uint16_write(req, nwname);
 378     for (i = 0; i < nwname; i++) {
 379         v9fs_string_write(req, wnames[i]);
 380     }
 381     v9fs_req_send(req);
 382     return req;
 383 }
 384
 385 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 386 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 387 {
 388     uint16_t local_nwqid;
 389
 390     v9fs_req_recv(req, P9_RWALK);
 391     v9fs_uint16_read(req, &local_nwqid);
 392     if (nwqid) {
 393         *nwqid = local_nwqid;
 394     }
 395     if (wqid) {
 396         *wqid = g_malloc(local_nwqid * 13);
 397         v9fs_memread(req, *wqid, local_nwqid * 13);
 398     }
 399     v9fs_req_free(req);
 400 }
 401
 402 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 403 static P9Req *v9fs_tlopen(QVirtIO9P *v9p, uint32_t fid, uint32_t flags,
 404                           uint16_t tag)
 405 {
 406     P9Req *req;
 407
 408     req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 409     v9fs_uint32_write(req, fid);
 410     v9fs_uint32_write(req, flags);
 411     v9fs_req_send(req);
 412     return req;
 413 }
 414
 415 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 416 static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 417 {
 418     v9fs_req_recv(req, P9_RLOPEN);
 419     if (qid) {
 420         v9fs_memread(req, qid, 13);
 421     } else {
 422         v9fs_memskip(req, 13);
 423     }
 424     if (iounit) {
 425         v9fs_uint32_read(req, iounit);
 426     }
 427     v9fs_req_free(req);
 428 }
 429
 430 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 431 static P9Req *v9fs_twrite(QVirtIO9P *v9p, uint32_t fid, uint64_t offset,
 432                           uint32_t count, const void *data, uint16_t tag)
 433 {
 434     P9Req *req;
 435     uint32_t body_size = 4 + 8 + 4;
 436
 437     g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 438     body_size += count;
 439     req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 440     v9fs_uint32_write(req, fid);
 441     v9fs_uint64_write(req, offset);
 442     v9fs_uint32_write(req, count);
 443     v9fs_memwrite(req, data, count);
 444     v9fs_req_send(req);
 445     return req;
 446 }
 447
 448 /* size[4] Rwrite tag[2] count[4] */
 449 static void v9fs_rwrite(P9Req *req, uint32_t *count)
 450 {
 451     v9fs_req_recv(req, P9_RWRITE);
 452     if (count) {
 453         v9fs_uint32_read(req, count);
 454     }
 455     v9fs_req_free(req);
 456 }
 457
 458 /* size[4] Tflush tag[2] oldtag[2] */
 459 static P9Req *v9fs_tflush(QVirtIO9P *v9p, uint16_t oldtag, uint16_t tag)
 460 {
 461     P9Req *req;
 462
 463     req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 464     v9fs_uint32_write(req, oldtag);
 465     v9fs_req_send(req);
 466     return req;
 467 }
 468
 469 /* size[4] Rflush tag[2] */
 470 static void v9fs_rflush(P9Req *req)
 471 {
 472     v9fs_req_recv(req, P9_RFLUSH);
 473     v9fs_req_free(req);
 474 }
 475
 476 static void fs_version(QVirtIO9P *v9p)
 477 {
 478     const char *version = "9P2000.L";
 479     uint16_t server_len;
 480     char *server_version;
 481     P9Req *req;
 482
 483     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 484     v9fs_req_wait_for_reply(req, NULL);
 485     v9fs_rversion(req, &server_len, &server_version);
 486
 487     g_assert_cmpmem(server_version, server_len, version, strlen(version));
 488
 489     g_free(server_version);
 490 }
 491
 492 static void fs_attach(QVirtIO9P *v9p)
 493 {
 494     P9Req *req;
 495
 496     fs_version(v9p);
 497     req = v9fs_tattach(v9p, 0, getuid(), 0);
 498     v9fs_req_wait_for_reply(req, NULL);
 499     v9fs_rattach(req, NULL);
 500 }
 501
 502 static void fs_walk(QVirtIO9P *v9p)
 503 {
 504     char *wnames[P9_MAXWELEM];
 505     uint16_t nwqid;
 506     v9fs_qid *wqid;
 507     int i;
 508     P9Req *req;
 509
 510     for (i = 0; i < P9_MAXWELEM; i++) {
 511         wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 512     }
 513
 514     fs_attach(v9p);
 515     req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 516     v9fs_req_wait_for_reply(req, NULL);
 517     v9fs_rwalk(req, &nwqid, &wqid);
 518
 519     g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 520
 521     for (i = 0; i < P9_MAXWELEM; i++) {
 522         g_free(wnames[i]);
 523     }
 524
 525     g_free(wqid);
 526 }
 527
 528 static void fs_walk_no_slash(QVirtIO9P *v9p)
 529 {
 530     char *const wnames[] = { g_strdup(" /") };
 531     P9Req *req;
 532     uint32_t err;
 533
 534     fs_attach(v9p);
 535     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 536     v9fs_req_wait_for_reply(req, NULL);
 537     v9fs_rlerror(req, &err);
 538
 539     g_assert_cmpint(err, ==, ENOENT);
 540
 541     g_free(wnames[0]);
 542 }
 543
 544 static void fs_walk_dotdot(QVirtIO9P *v9p)
 545 {
 546     char *const wnames[] = { g_strdup("..") };
 547     v9fs_qid root_qid, *wqid;
 548     P9Req *req;
 549
 550     fs_version(v9p);
 551     req = v9fs_tattach(v9p, 0, getuid(), 0);
 552     v9fs_req_wait_for_reply(req, NULL);
 553     v9fs_rattach(req, &root_qid);
 554
 555     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 556     v9fs_req_wait_for_reply(req, NULL);
 557     v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 558
 559     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 560
 561     g_free(wqid);
 562     g_free(wnames[0]);
 563 }
 564
 565 static void fs_lopen(QVirtIO9P *v9p)
 566 {
 567     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
 568     P9Req *req;
 569
 570     fs_attach(v9p);
 571     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 572     v9fs_req_wait_for_reply(req, NULL);
 573     v9fs_rwalk(req, NULL, NULL);
 574
 575     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 576     v9fs_req_wait_for_reply(req, NULL);
 577     v9fs_rlopen(req, NULL, NULL);
 578
 579     g_free(wnames[0]);
 580 }
 581
 582 static void fs_write(QVirtIO9P *v9p)
 583 {
 584     static const uint32_t write_count = P9_MAX_SIZE / 2;
 585     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
 586     char *buf = g_malloc0(write_count);
 587     uint32_t count;
 588     P9Req *req;
 589
 590     fs_attach(v9p);
 591     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 592     v9fs_req_wait_for_reply(req, NULL);
 593     v9fs_rwalk(req, NULL, NULL);
 594
 595     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 596     v9fs_req_wait_for_reply(req, NULL);
 597     v9fs_rlopen(req, NULL, NULL);
 598
 599     req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
 600     v9fs_req_wait_for_reply(req, NULL);
 601     v9fs_rwrite(req, &count);
 602     g_assert_cmpint(count, ==, write_count);
 603
 604     g_free(buf);
 605     g_free(wnames[0]);
 606 }
 607
 608 static void fs_flush_success(QVirtIO9P *v9p)
 609 {
 610     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 611     P9Req *req, *flush_req;
 612     uint32_t reply_len;
 613     uint8_t should_block;
 614
 615     fs_attach(v9p);
 616     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 617     v9fs_req_wait_for_reply(req, NULL);
 618     v9fs_rwalk(req, NULL, NULL);
 619
 620     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 621     v9fs_req_wait_for_reply(req, NULL);
 622     v9fs_rlopen(req, NULL, NULL);
 623
 624     /* This will cause the 9p server to try to write data to the backend,
 625      * until the write request gets cancelled.
 626      */
 627     should_block = 1;
 628     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 629
 630     flush_req = v9fs_tflush(v9p, req->tag, 1);
 631
 632     /* The write request is supposed to be flushed: the server should just
 633      * mark the write request as used and reply to the flush request.
 634      */
 635     v9fs_req_wait_for_reply(req, &reply_len);
 636     g_assert_cmpint(reply_len, ==, 0);
 637     v9fs_req_free(req);
 638     v9fs_rflush(flush_req);
 639
 640     g_free(wnames[0]);
 641 }
 642
 643 static void fs_flush_ignored(QVirtIO9P *v9p)
 644 {
 645     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 646     P9Req *req, *flush_req;
 647     uint32_t count;
 648     uint8_t should_block;
 649
 650     fs_attach(v9p);
 651     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 652     v9fs_req_wait_for_reply(req, NULL);
 653     v9fs_rwalk(req, NULL, NULL);
 654
 655     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 656     v9fs_req_wait_for_reply(req, NULL);
 657     v9fs_rlopen(req, NULL, NULL);
 658
 659     /* This will cause the write request to complete right away, before it
 660      * could be actually cancelled.
 661      */
 662     should_block = 0;
 663     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 664
 665     flush_req = v9fs_tflush(v9p, req->tag, 1);
 666
 667     /* The write request is supposed to complete. The server should
 668      * reply to the write request and the flush request.
 669      */
 670     v9fs_req_wait_for_reply(req, NULL);
 671     v9fs_rwrite(req, &count);
 672     g_assert_cmpint(count, ==, sizeof(should_block));
 673     v9fs_rflush(flush_req);
 674
 675     g_free(wnames[0]);
 676 }
 677
 678 typedef void (*v9fs_test_fn)(QVirtIO9P *v9p);
 679
 680 static void v9fs_run_pci_test(gconstpointer data)
 681 {
 682     v9fs_test_fn fn = data;
 683     QVirtIO9P *v9p = qvirtio_9p_pci_start();
 684
 685     if (fn) {
 686         fn(v9p);
 687     }
 688     qvirtio_9p_pci_stop(v9p);
 689 }
 690
 691 static void v9fs_qtest_pci_add(const char *path, v9fs_test_fn fn)
 692 {
 693     qtest_add_data_func(path, fn, v9fs_run_pci_test);
 694 }
 695
 696 int main(int argc, char **argv)
 697 {
 698     g_test_init(&argc, &argv, NULL);
 699     v9fs_qtest_pci_add("/virtio/9p/pci/nop", NULL);
 700     v9fs_qtest_pci_add("/virtio/9p/pci/config", pci_config);
 701     v9fs_qtest_pci_add("/virtio/9p/pci/fs/version/basic", fs_version);
 702     v9fs_qtest_pci_add("/virtio/9p/pci/fs/attach/basic", fs_attach);
 703     v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/basic", fs_walk);
 704     v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/no_slash", fs_walk_no_slash);
 705     v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/dotdot_from_root",
 706                        fs_walk_dotdot);
 707     v9fs_qtest_pci_add("/virtio/9p/pci/fs/lopen/basic", fs_lopen);
 708     v9fs_qtest_pci_add("/virtio/9p/pci/fs/write/basic", fs_write);
 709     v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/success", fs_flush_success);
 710     v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/ignored", fs_flush_ignored);
 711
 712     return g_test_run();
 713 }