qemu/tests/virtio-9p-test.c
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   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
  24static const char mount_tag[] = "qtest";
  25
  26typedef struct {
  27    QVirtioDevice *dev;
  28    QOSState *qs;
  29    QVirtQueue *vq;
  30} QVirtIO9P;
  31
  32static 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    global_qtest = v9p->qs->qts;
  48
  49    return v9p;
  50}
  51
  52static void qvirtio_9p_stop(QVirtIO9P *v9p)
  53{
  54    qtest_shutdown(v9p->qs);
  55    g_free(v9p);
  56}
  57
  58static QVirtIO9P *qvirtio_9p_pci_start(void)
  59{
  60    QVirtIO9P *v9p = qvirtio_9p_start("virtio-9p-pci");
  61    QVirtioPCIDevice *dev = qvirtio_pci_device_find(v9p->qs->pcibus,
  62                                                    VIRTIO_ID_9P);
  63    g_assert_nonnull(dev);
  64    g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_9P);
  65    v9p->dev = (QVirtioDevice *) dev;
  66
  67    qvirtio_pci_device_enable(dev);
  68    qvirtio_reset(v9p->dev);
  69    qvirtio_set_acknowledge(v9p->dev);
  70    qvirtio_set_driver(v9p->dev);
  71
  72    v9p->vq = qvirtqueue_setup(v9p->dev, v9p->qs->alloc, 0);
  73
  74    qvirtio_set_driver_ok(v9p->dev);
  75
  76    return v9p;
  77}
  78
  79static void qvirtio_9p_pci_stop(QVirtIO9P *v9p)
  80{
  81    qvirtqueue_cleanup(v9p->dev->bus, v9p->vq, v9p->qs->alloc);
  82    qvirtio_pci_device_disable(container_of(v9p->dev, QVirtioPCIDevice, vdev));
  83    qvirtio_pci_device_free((QVirtioPCIDevice *)v9p->dev);
  84    qvirtio_9p_stop(v9p);
  85}
  86
  87static void pci_config(QVirtIO9P *v9p)
  88{
  89    size_t tag_len = qvirtio_config_readw(v9p->dev, 0);
  90    char *tag;
  91    int i;
  92
  93    g_assert_cmpint(tag_len, ==, strlen(mount_tag));
  94
  95    tag = g_malloc(tag_len);
  96    for (i = 0; i < tag_len; i++) {
  97        tag[i] = qvirtio_config_readb(v9p->dev, i + 2);
  98    }
  99    g_assert_cmpmem(tag, tag_len, mount_tag, tag_len);
 100    g_free(tag);
 101}
 102
 103#define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */
 104
 105typedef struct {
 106    QVirtIO9P *v9p;
 107    uint16_t tag;
 108    uint64_t t_msg;
 109    uint32_t t_size;
 110    uint64_t r_msg;
 111    /* No r_size, it is hardcoded to P9_MAX_SIZE */
 112    size_t t_off;
 113    size_t r_off;
 114    uint32_t free_head;
 115} P9Req;
 116
 117static void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
 118{
 119    memwrite(req->t_msg + req->t_off, addr, len);
 120    req->t_off += len;
 121}
 122
 123static void v9fs_memskip(P9Req *req, size_t len)
 124{
 125    req->r_off += len;
 126}
 127
 128static void v9fs_memread(P9Req *req, void *addr, size_t len)
 129{
 130    memread(req->r_msg + req->r_off, addr, len);
 131    req->r_off += len;
 132}
 133
 134static void v9fs_uint16_write(P9Req *req, uint16_t val)
 135{
 136    uint16_t le_val = cpu_to_le16(val);
 137
 138    v9fs_memwrite(req, &le_val, 2);
 139}
 140
 141static void v9fs_uint16_read(P9Req *req, uint16_t *val)
 142{
 143    v9fs_memread(req, val, 2);
 144    le16_to_cpus(val);
 145}
 146
 147static void v9fs_uint32_write(P9Req *req, uint32_t val)
 148{
 149    uint32_t le_val = cpu_to_le32(val);
 150
 151    v9fs_memwrite(req, &le_val, 4);
 152}
 153
 154static void v9fs_uint64_write(P9Req *req, uint64_t val)
 155{
 156    uint64_t le_val = cpu_to_le64(val);
 157
 158    v9fs_memwrite(req, &le_val, 8);
 159}
 160
 161static void v9fs_uint32_read(P9Req *req, uint32_t *val)
 162{
 163    v9fs_memread(req, val, 4);
 164    le32_to_cpus(val);
 165}
 166
 167/* len[2] string[len] */
 168static uint16_t v9fs_string_size(const char *string)
 169{
 170    size_t len = strlen(string);
 171
 172    g_assert_cmpint(len, <=, UINT16_MAX - 2);
 173
 174    return 2 + len;
 175}
 176
 177static void v9fs_string_write(P9Req *req, const char *string)
 178{
 179    int len = strlen(string);
 180
 181    g_assert_cmpint(len, <=, UINT16_MAX);
 182
 183    v9fs_uint16_write(req, (uint16_t) len);
 184    v9fs_memwrite(req, string, len);
 185}
 186
 187static void v9fs_string_read(P9Req *req, uint16_t *len, char **string)
 188{
 189    uint16_t local_len;
 190
 191    v9fs_uint16_read(req, &local_len);
 192    if (len) {
 193        *len = local_len;
 194    }
 195    if (string) {
 196        *string = g_malloc(local_len);
 197        v9fs_memread(req, *string, local_len);
 198    } else {
 199        v9fs_memskip(req, local_len);
 200    }
 201}
 202
 203 typedef struct {
 204    uint32_t size;
 205    uint8_t id;
 206    uint16_t tag;
 207} QEMU_PACKED P9Hdr;
 208
 209static P9Req *v9fs_req_init(QVirtIO9P *v9p, uint32_t size, uint8_t id,
 210                            uint16_t tag)
 211{
 212    P9Req *req = g_new0(P9Req, 1);
 213    uint32_t total_size = 7; /* 9P header has well-known size of 7 bytes */
 214    P9Hdr hdr = {
 215        .id = id,
 216        .tag = cpu_to_le16(tag)
 217    };
 218
 219    g_assert_cmpint(total_size, <=, UINT32_MAX - size);
 220    total_size += size;
 221    hdr.size = cpu_to_le32(total_size);
 222
 223    g_assert_cmpint(total_size, <=, P9_MAX_SIZE);
 224
 225    req->v9p = v9p;
 226    req->t_size = total_size;
 227    req->t_msg = guest_alloc(v9p->qs->alloc, req->t_size);
 228    v9fs_memwrite(req, &hdr, 7);
 229    req->tag = tag;
 230    return req;
 231}
 232
 233static void v9fs_req_send(P9Req *req)
 234{
 235    QVirtIO9P *v9p = req->v9p;
 236
 237    req->r_msg = guest_alloc(v9p->qs->alloc, P9_MAX_SIZE);
 238    req->free_head = qvirtqueue_add(v9p->vq, req->t_msg, req->t_size, false,
 239                                    true);
 240    qvirtqueue_add(v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
 241    qvirtqueue_kick(v9p->dev, v9p->vq, req->free_head);
 242    req->t_off = 0;
 243}
 244
 245static const char *rmessage_name(uint8_t id)
 246{
 247    return
 248        id == P9_RLERROR ? "RLERROR" :
 249        id == P9_RVERSION ? "RVERSION" :
 250        id == P9_RATTACH ? "RATTACH" :
 251        id == P9_RWALK ? "RWALK" :
 252        id == P9_RLOPEN ? "RLOPEN" :
 253        id == P9_RWRITE ? "RWRITE" :
 254        id == P9_RFLUSH ? "RFLUSH" :
 255        "<unknown>";
 256}
 257
 258static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 259{
 260    QVirtIO9P *v9p = req->v9p;
 261
 262    qvirtio_wait_used_elem(v9p->dev, v9p->vq, req->free_head, len,
 263                           QVIRTIO_9P_TIMEOUT_US);
 264}
 265
 266static void v9fs_req_recv(P9Req *req, uint8_t id)
 267{
 268    P9Hdr hdr;
 269
 270    v9fs_memread(req, &hdr, 7);
 271    hdr.size = ldl_le_p(&hdr.size);
 272    hdr.tag = lduw_le_p(&hdr.tag);
 273
 274    g_assert_cmpint(hdr.size, >=, 7);
 275    g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 276    g_assert_cmpint(hdr.tag, ==, req->tag);
 277
 278    if (hdr.id != id) {
 279        g_printerr("Received response %d (%s) instead of %d (%s)\n",
 280                   hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 281
 282        if (hdr.id == P9_RLERROR) {
 283            uint32_t err;
 284            v9fs_uint32_read(req, &err);
 285            g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 286        }
 287    }
 288    g_assert_cmpint(hdr.id, ==, id);
 289}
 290
 291static void v9fs_req_free(P9Req *req)
 292{
 293    QVirtIO9P *v9p = req->v9p;
 294
 295    guest_free(v9p->qs->alloc, req->t_msg);
 296    guest_free(v9p->qs->alloc, req->r_msg);
 297    g_free(req);
 298}
 299
 300/* size[4] Rlerror tag[2] ecode[4] */
 301static void v9fs_rlerror(P9Req *req, uint32_t *err)
 302{
 303    v9fs_req_recv(req, P9_RLERROR);
 304    v9fs_uint32_read(req, err);
 305    v9fs_req_free(req);
 306}
 307
 308/* size[4] Tversion tag[2] msize[4] version[s] */
 309static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version,
 310                            uint16_t tag)
 311{
 312    P9Req *req;
 313    uint32_t body_size = 4;
 314    uint16_t string_size = v9fs_string_size(version);
 315
 316    g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 317    body_size += string_size;
 318    req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
 319
 320    v9fs_uint32_write(req, msize);
 321    v9fs_string_write(req, version);
 322    v9fs_req_send(req);
 323    return req;
 324}
 325
 326/* size[4] Rversion tag[2] msize[4] version[s] */
 327static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 328{
 329    uint32_t msize;
 330
 331    v9fs_req_recv(req, P9_RVERSION);
 332    v9fs_uint32_read(req, &msize);
 333
 334    g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 335
 336    if (len || version) {
 337        v9fs_string_read(req, len, version);
 338    }
 339
 340    v9fs_req_free(req);
 341}
 342
 343/* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 344static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname,
 345                           uint16_t tag)
 346{
 347    const char *uname = ""; /* ignored by QEMU */
 348    const char *aname = ""; /* ignored by QEMU */
 349    P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 350
 351    v9fs_uint32_write(req, fid);
 352    v9fs_uint32_write(req, P9_NOFID);
 353    v9fs_string_write(req, uname);
 354    v9fs_string_write(req, aname);
 355    v9fs_uint32_write(req, n_uname);
 356    v9fs_req_send(req);
 357    return req;
 358}
 359
 360typedef char v9fs_qid[13];
 361
 362/* size[4] Rattach tag[2] qid[13] */
 363static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 364{
 365    v9fs_req_recv(req, P9_RATTACH);
 366    if (qid) {
 367        v9fs_memread(req, qid, 13);
 368    }
 369    v9fs_req_free(req);
 370}
 371
 372/* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 373static P9Req *v9fs_twalk(QVirtIO9P *v9p, uint32_t fid, uint32_t newfid,
 374                         uint16_t nwname, char *const wnames[], uint16_t tag)
 375{
 376    P9Req *req;
 377    int i;
 378    uint32_t body_size = 4 + 4 + 2;
 379
 380    for (i = 0; i < nwname; i++) {
 381        uint16_t wname_size = v9fs_string_size(wnames[i]);
 382
 383        g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 384        body_size += wname_size;
 385    }
 386    req = v9fs_req_init(v9p,  body_size, P9_TWALK, tag);
 387    v9fs_uint32_write(req, fid);
 388    v9fs_uint32_write(req, newfid);
 389    v9fs_uint16_write(req, nwname);
 390    for (i = 0; i < nwname; i++) {
 391        v9fs_string_write(req, wnames[i]);
 392    }
 393    v9fs_req_send(req);
 394    return req;
 395}
 396
 397/* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 398static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 399{
 400    uint16_t local_nwqid;
 401
 402    v9fs_req_recv(req, P9_RWALK);
 403    v9fs_uint16_read(req, &local_nwqid);
 404    if (nwqid) {
 405        *nwqid = local_nwqid;
 406    }
 407    if (wqid) {
 408        *wqid = g_malloc(local_nwqid * 13);
 409        v9fs_memread(req, *wqid, local_nwqid * 13);
 410    }
 411    v9fs_req_free(req);
 412}
 413
 414/* size[4] Tlopen tag[2] fid[4] flags[4] */
 415static P9Req *v9fs_tlopen(QVirtIO9P *v9p, uint32_t fid, uint32_t flags,
 416                          uint16_t tag)
 417{
 418    P9Req *req;
 419
 420    req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 421    v9fs_uint32_write(req, fid);
 422    v9fs_uint32_write(req, flags);
 423    v9fs_req_send(req);
 424    return req;
 425}
 426
 427/* size[4] Rlopen tag[2] qid[13] iounit[4] */
 428static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 429{
 430    v9fs_req_recv(req, P9_RLOPEN);
 431    if (qid) {
 432        v9fs_memread(req, qid, 13);
 433    } else {
 434        v9fs_memskip(req, 13);
 435    }
 436    if (iounit) {
 437        v9fs_uint32_read(req, iounit);
 438    }
 439    v9fs_req_free(req);
 440}
 441
 442/* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 443static P9Req *v9fs_twrite(QVirtIO9P *v9p, uint32_t fid, uint64_t offset,
 444                          uint32_t count, const void *data, uint16_t tag)
 445{
 446    P9Req *req;
 447    uint32_t body_size = 4 + 8 + 4;
 448
 449    g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 450    body_size += count;
 451    req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 452    v9fs_uint32_write(req, fid);
 453    v9fs_uint64_write(req, offset);
 454    v9fs_uint32_write(req, count);
 455    v9fs_memwrite(req, data, count);
 456    v9fs_req_send(req);
 457    return req;
 458}
 459
 460/* size[4] Rwrite tag[2] count[4] */
 461static void v9fs_rwrite(P9Req *req, uint32_t *count)
 462{
 463    v9fs_req_recv(req, P9_RWRITE);
 464    if (count) {
 465        v9fs_uint32_read(req, count);
 466    }
 467    v9fs_req_free(req);
 468}
 469
 470/* size[4] Tflush tag[2] oldtag[2] */
 471static P9Req *v9fs_tflush(QVirtIO9P *v9p, uint16_t oldtag, uint16_t tag)
 472{
 473    P9Req *req;
 474
 475    req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 476    v9fs_uint32_write(req, oldtag);
 477    v9fs_req_send(req);
 478    return req;
 479}
 480
 481/* size[4] Rflush tag[2] */
 482static void v9fs_rflush(P9Req *req)
 483{
 484    v9fs_req_recv(req, P9_RFLUSH);
 485    v9fs_req_free(req);
 486}
 487
 488static void fs_version(QVirtIO9P *v9p)
 489{
 490    const char *version = "9P2000.L";
 491    uint16_t server_len;
 492    char *server_version;
 493    P9Req *req;
 494
 495    req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 496    v9fs_req_wait_for_reply(req, NULL);
 497    v9fs_rversion(req, &server_len, &server_version);
 498
 499    g_assert_cmpmem(server_version, server_len, version, strlen(version));
 500
 501    g_free(server_version);
 502}
 503
 504static void fs_attach(QVirtIO9P *v9p)
 505{
 506    P9Req *req;
 507
 508    fs_version(v9p);
 509    req = v9fs_tattach(v9p, 0, getuid(), 0);
 510    v9fs_req_wait_for_reply(req, NULL);
 511    v9fs_rattach(req, NULL);
 512}
 513
 514static void fs_walk(QVirtIO9P *v9p)
 515{
 516    char *wnames[P9_MAXWELEM];
 517    uint16_t nwqid;
 518    v9fs_qid *wqid;
 519    int i;
 520    P9Req *req;
 521
 522    for (i = 0; i < P9_MAXWELEM; i++) {
 523        wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 524    }
 525
 526    fs_attach(v9p);
 527    req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 528    v9fs_req_wait_for_reply(req, NULL);
 529    v9fs_rwalk(req, &nwqid, &wqid);
 530
 531    g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 532
 533    for (i = 0; i < P9_MAXWELEM; i++) {
 534        g_free(wnames[i]);
 535    }
 536
 537    g_free(wqid);
 538}
 539
 540static void fs_walk_no_slash(QVirtIO9P *v9p)
 541{
 542    char *const wnames[] = { g_strdup(" /") };
 543    P9Req *req;
 544    uint32_t err;
 545
 546    fs_attach(v9p);
 547    req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 548    v9fs_req_wait_for_reply(req, NULL);
 549    v9fs_rlerror(req, &err);
 550
 551    g_assert_cmpint(err, ==, ENOENT);
 552
 553    g_free(wnames[0]);
 554}
 555
 556static void fs_walk_dotdot(QVirtIO9P *v9p)
 557{
 558    char *const wnames[] = { g_strdup("..") };
 559    v9fs_qid root_qid, *wqid;
 560    P9Req *req;
 561
 562    fs_version(v9p);
 563    req = v9fs_tattach(v9p, 0, getuid(), 0);
 564    v9fs_req_wait_for_reply(req, NULL);
 565    v9fs_rattach(req, &root_qid);
 566
 567    req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 568    v9fs_req_wait_for_reply(req, NULL);
 569    v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 570
 571    g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 572
 573    g_free(wqid);
 574    g_free(wnames[0]);
 575}
 576
 577static void fs_lopen(QVirtIO9P *v9p)
 578{
 579    char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
 580    P9Req *req;
 581
 582    fs_attach(v9p);
 583    req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 584    v9fs_req_wait_for_reply(req, NULL);
 585    v9fs_rwalk(req, NULL, NULL);
 586
 587    req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 588    v9fs_req_wait_for_reply(req, NULL);
 589    v9fs_rlopen(req, NULL, NULL);
 590
 591    g_free(wnames[0]);
 592}
 593
 594static void fs_write(QVirtIO9P *v9p)
 595{
 596    static const uint32_t write_count = P9_MAX_SIZE / 2;
 597    char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
 598    char *buf = g_malloc0(write_count);
 599    uint32_t count;
 600    P9Req *req;
 601
 602    fs_attach(v9p);
 603    req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 604    v9fs_req_wait_for_reply(req, NULL);
 605    v9fs_rwalk(req, NULL, NULL);
 606
 607    req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 608    v9fs_req_wait_for_reply(req, NULL);
 609    v9fs_rlopen(req, NULL, NULL);
 610
 611    req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
 612    v9fs_req_wait_for_reply(req, NULL);
 613    v9fs_rwrite(req, &count);
 614    g_assert_cmpint(count, ==, write_count);
 615
 616    g_free(buf);
 617    g_free(wnames[0]);
 618}
 619
 620static void fs_flush_success(QVirtIO9P *v9p)
 621{
 622    char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 623    P9Req *req, *flush_req;
 624    uint32_t reply_len;
 625    uint8_t should_block;
 626
 627    fs_attach(v9p);
 628    req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 629    v9fs_req_wait_for_reply(req, NULL);
 630    v9fs_rwalk(req, NULL, NULL);
 631
 632    req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 633    v9fs_req_wait_for_reply(req, NULL);
 634    v9fs_rlopen(req, NULL, NULL);
 635
 636    /* This will cause the 9p server to try to write data to the backend,
 637     * until the write request gets cancelled.
 638     */
 639    should_block = 1;
 640    req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 641
 642    flush_req = v9fs_tflush(v9p, req->tag, 1);
 643
 644    /* The write request is supposed to be flushed: the server should just
 645     * mark the write request as used and reply to the flush request.
 646     */
 647    v9fs_req_wait_for_reply(req, &reply_len);
 648    g_assert_cmpint(reply_len, ==, 0);
 649    v9fs_req_free(req);
 650    v9fs_rflush(flush_req);
 651
 652    g_free(wnames[0]);
 653}
 654
 655static void fs_flush_ignored(QVirtIO9P *v9p)
 656{
 657    char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 658    P9Req *req, *flush_req;
 659    uint32_t count;
 660    uint8_t should_block;
 661
 662    fs_attach(v9p);
 663    req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 664    v9fs_req_wait_for_reply(req, NULL);
 665    v9fs_rwalk(req, NULL, NULL);
 666
 667    req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 668    v9fs_req_wait_for_reply(req, NULL);
 669    v9fs_rlopen(req, NULL, NULL);
 670
 671    /* This will cause the write request to complete right away, before it
 672     * could be actually cancelled.
 673     */
 674    should_block = 0;
 675    req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 676
 677    flush_req = v9fs_tflush(v9p, req->tag, 1);
 678
 679    /* The write request is supposed to complete. The server should
 680     * reply to the write request and the flush request.
 681     */
 682    v9fs_req_wait_for_reply(req, NULL);
 683    v9fs_rwrite(req, &count);
 684    g_assert_cmpint(count, ==, sizeof(should_block));
 685    v9fs_rflush(flush_req);
 686
 687    g_free(wnames[0]);
 688}
 689
 690typedef void (*v9fs_test_fn)(QVirtIO9P *v9p);
 691
 692static void v9fs_run_pci_test(gconstpointer data)
 693{
 694    v9fs_test_fn fn = data;
 695    QVirtIO9P *v9p = qvirtio_9p_pci_start();
 696
 697    if (fn) {
 698        fn(v9p);
 699    }
 700    qvirtio_9p_pci_stop(v9p);
 701}
 702
 703static void v9fs_qtest_pci_add(const char *path, v9fs_test_fn fn)
 704{
 705    qtest_add_data_func(path, fn, v9fs_run_pci_test);
 706}
 707
 708int main(int argc, char **argv)
 709{
 710    g_test_init(&argc, &argv, NULL);
 711    v9fs_qtest_pci_add("/virtio/9p/pci/nop", NULL);
 712    v9fs_qtest_pci_add("/virtio/9p/pci/config", pci_config);
 713    v9fs_qtest_pci_add("/virtio/9p/pci/fs/version/basic", fs_version);
 714    v9fs_qtest_pci_add("/virtio/9p/pci/fs/attach/basic", fs_attach);
 715    v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/basic", fs_walk);
 716    v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/no_slash", fs_walk_no_slash);
 717    v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/dotdot_from_root",
 718                       fs_walk_dotdot);
 719    v9fs_qtest_pci_add("/virtio/9p/pci/fs/lopen/basic", fs_lopen);
 720    v9fs_qtest_pci_add("/virtio/9p/pci/fs/write/basic", fs_write);
 721    v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/success", fs_flush_success);
 722    v9fs_qtest_pci_add("/virtio/9p/pci/fs/flush/ignored", fs_flush_ignored);
 723
 724    return g_test_run();
 725}
 726