tests/qtest/libqos/virtio-9p-client.c

   1 /*
   2  * 9P network client for VirtIO 9P test cases (based on QTest)
   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 /*
  11  * Not so fast! You might want to read the 9p developer docs first:
  12  * https://wiki.qemu.org/Documentation/9p
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "virtio-9p-client.h"
  17
  18 #define QVIRTIO_9P_TIMEOUT_US (10 * 1000 * 1000)
  19 static QGuestAllocator *alloc;
  20
  21 void v9fs_set_allocator(QGuestAllocator *t_alloc)
  22 {
  23     alloc = t_alloc;
  24 }
  25
  26 /*
  27  * Used to auto generate new fids. Start with arbitrary high value to avoid
  28  * collision with hard coded fids in basic test code.
  29  */
  30 static uint32_t fid_generator = 1000;
  31
  32 static uint32_t genfid(void)
  33 {
  34     return fid_generator++;
  35 }
  36
  37 /**
  38  * Splits the @a in string by @a delim into individual (non empty) strings
  39  * and outputs them to @a out. The output array @a out is NULL terminated.
  40  *
  41  * Output array @a out must be freed by calling split_free().
  42  *
  43  * @returns number of individual elements in output array @a out (without the
  44  *          final NULL terminating element)
  45  */
  46 static int split(const char *in, const char *delim, char ***out)
  47 {
  48     int n = 0, i = 0;
  49     char *tmp, *p;
  50
  51     tmp = g_strdup(in);
  52     for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
  53         if (strlen(p) > 0) {
  54             ++n;
  55         }
  56     }
  57     g_free(tmp);
  58
  59     *out = g_new0(char *, n + 1); /* last element NULL delimiter */
  60
  61     tmp = g_strdup(in);
  62     for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
  63         if (strlen(p) > 0) {
  64             (*out)[i++] = g_strdup(p);
  65         }
  66     }
  67     g_free(tmp);
  68
  69     return n;
  70 }
  71
  72 static void split_free(char ***out)
  73 {
  74     int i;
  75     if (!*out) {
  76         return;
  77     }
  78     for (i = 0; (*out)[i]; ++i) {
  79         g_free((*out)[i]);
  80     }
  81     g_free(*out);
  82     *out = NULL;
  83 }
  84
  85 void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
  86 {
  87     qtest_memwrite(req->qts, req->t_msg + req->t_off, addr, len);
  88     req->t_off += len;
  89 }
  90
  91 void v9fs_memskip(P9Req *req, size_t len)
  92 {
  93     req->r_off += len;
  94 }
  95
  96 void v9fs_memread(P9Req *req, void *addr, size_t len)
  97 {
  98     qtest_memread(req->qts, req->r_msg + req->r_off, addr, len);
  99     req->r_off += len;
 100 }
 101
 102 void v9fs_uint8_read(P9Req *req, uint8_t *val)
 103 {
 104     v9fs_memread(req, val, 1);
 105 }
 106
 107 void v9fs_uint16_write(P9Req *req, uint16_t val)
 108 {
 109     uint16_t le_val = cpu_to_le16(val);
 110
 111     v9fs_memwrite(req, &le_val, 2);
 112 }
 113
 114 void v9fs_uint16_read(P9Req *req, uint16_t *val)
 115 {
 116     v9fs_memread(req, val, 2);
 117     le16_to_cpus(val);
 118 }
 119
 120 void v9fs_uint32_write(P9Req *req, uint32_t val)
 121 {
 122     uint32_t le_val = cpu_to_le32(val);
 123
 124     v9fs_memwrite(req, &le_val, 4);
 125 }
 126
 127 void v9fs_uint64_write(P9Req *req, uint64_t val)
 128 {
 129     uint64_t le_val = cpu_to_le64(val);
 130
 131     v9fs_memwrite(req, &le_val, 8);
 132 }
 133
 134 void v9fs_uint32_read(P9Req *req, uint32_t *val)
 135 {
 136     v9fs_memread(req, val, 4);
 137     le32_to_cpus(val);
 138 }
 139
 140 void v9fs_uint64_read(P9Req *req, uint64_t *val)
 141 {
 142     v9fs_memread(req, val, 8);
 143     le64_to_cpus(val);
 144 }
 145
 146 /* len[2] string[len] */
 147 uint16_t v9fs_string_size(const char *string)
 148 {
 149     size_t len = strlen(string);
 150
 151     g_assert_cmpint(len, <=, UINT16_MAX - 2);
 152
 153     return 2 + len;
 154 }
 155
 156 void v9fs_string_write(P9Req *req, const char *string)
 157 {
 158     int len = strlen(string);
 159
 160     g_assert_cmpint(len, <=, UINT16_MAX);
 161
 162     v9fs_uint16_write(req, (uint16_t) len);
 163     v9fs_memwrite(req, string, len);
 164 }
 165
 166 void v9fs_string_read(P9Req *req, uint16_t *len, char **string)
 167 {
 168     uint16_t local_len;
 169
 170     v9fs_uint16_read(req, &local_len);
 171     if (len) {
 172         *len = local_len;
 173     }
 174     if (string) {
 175         *string = g_malloc(local_len + 1);
 176         v9fs_memread(req, *string, local_len);
 177         (*string)[local_len] = 0;
 178     } else {
 179         v9fs_memskip(req, local_len);
 180     }
 181 }
 182
 183 typedef struct {
 184     uint32_t size;
 185     uint8_t id;
 186     uint16_t tag;
 187 } QEMU_PACKED P9Hdr;
 188
 189 P9Req *v9fs_req_init(QVirtio9P *v9p, uint32_t size, uint8_t id,
 190                      uint16_t tag)
 191 {
 192     P9Req *req = g_new0(P9Req, 1);
 193     uint32_t total_size = 7; /* 9P header has well-known size of 7 bytes */
 194     P9Hdr hdr = {
 195         .id = id,
 196         .tag = cpu_to_le16(tag)
 197     };
 198
 199     g_assert_cmpint(total_size, <=, UINT32_MAX - size);
 200     total_size += size;
 201     hdr.size = cpu_to_le32(total_size);
 202
 203     g_assert_cmpint(total_size, <=, P9_MAX_SIZE);
 204
 205     req->qts = global_qtest;
 206     req->v9p = v9p;
 207     req->t_size = total_size;
 208     req->t_msg = guest_alloc(alloc, req->t_size);
 209     v9fs_memwrite(req, &hdr, 7);
 210     req->tag = tag;
 211     return req;
 212 }
 213
 214 void v9fs_req_send(P9Req *req)
 215 {
 216     QVirtio9P *v9p = req->v9p;
 217
 218     req->r_msg = guest_alloc(alloc, P9_MAX_SIZE);
 219     req->free_head = qvirtqueue_add(req->qts, v9p->vq, req->t_msg, req->t_size,
 220                                     false, true);
 221     qvirtqueue_add(req->qts, v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
 222     qvirtqueue_kick(req->qts, v9p->vdev, v9p->vq, req->free_head);
 223     req->t_off = 0;
 224 }
 225
 226 static const char *rmessage_name(uint8_t id)
 227 {
 228     return
 229         id == P9_RLERROR ? "RLERROR" :
 230         id == P9_RVERSION ? "RVERSION" :
 231         id == P9_RATTACH ? "RATTACH" :
 232         id == P9_RWALK ? "RWALK" :
 233         id == P9_RLOPEN ? "RLOPEN" :
 234         id == P9_RWRITE ? "RWRITE" :
 235         id == P9_RMKDIR ? "RMKDIR" :
 236         id == P9_RLCREATE ? "RLCREATE" :
 237         id == P9_RSYMLINK ? "RSYMLINK" :
 238         id == P9_RLINK ? "RLINK" :
 239         id == P9_RUNLINKAT ? "RUNLINKAT" :
 240         id == P9_RFLUSH ? "RFLUSH" :
 241         id == P9_RREADDIR ? "READDIR" :
 242         "<unknown>";
 243 }
 244
 245 void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 246 {
 247     QVirtio9P *v9p = req->v9p;
 248
 249     qvirtio_wait_used_elem(req->qts, v9p->vdev, v9p->vq, req->free_head, len,
 250                            QVIRTIO_9P_TIMEOUT_US);
 251 }
 252
 253 void v9fs_req_recv(P9Req *req, uint8_t id)
 254 {
 255     P9Hdr hdr;
 256
 257     v9fs_memread(req, &hdr, 7);
 258     hdr.size = ldl_le_p(&hdr.size);
 259     hdr.tag = lduw_le_p(&hdr.tag);
 260
 261     g_assert_cmpint(hdr.size, >=, 7);
 262     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 263     g_assert_cmpint(hdr.tag, ==, req->tag);
 264
 265     if (hdr.id != id) {
 266         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 267                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 268
 269         if (hdr.id == P9_RLERROR) {
 270             uint32_t err;
 271             v9fs_uint32_read(req, &err);
 272             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 273         }
 274     }
 275     g_assert_cmpint(hdr.id, ==, id);
 276 }
 277
 278 void v9fs_req_free(P9Req *req)
 279 {
 280     guest_free(alloc, req->t_msg);
 281     guest_free(alloc, req->r_msg);
 282     g_free(req);
 283 }
 284
 285 /* size[4] Rlerror tag[2] ecode[4] */
 286 void v9fs_rlerror(P9Req *req, uint32_t *err)
 287 {
 288     v9fs_req_recv(req, P9_RLERROR);
 289     v9fs_uint32_read(req, err);
 290     v9fs_req_free(req);
 291 }
 292
 293 /* size[4] Tversion tag[2] msize[4] version[s] */
 294 TVersionRes v9fs_tversion(TVersionOpt opt)
 295 {
 296     P9Req *req;
 297     uint32_t err;
 298     uint32_t body_size = 4;
 299     uint16_t string_size;
 300     uint16_t server_len;
 301     g_autofree char *server_version = NULL;
 302
 303     g_assert(opt.client);
 304
 305     if (!opt.msize) {
 306         opt.msize = P9_MAX_SIZE;
 307     }
 308
 309     if (!opt.tag) {
 310         opt.tag = P9_NOTAG;
 311     }
 312
 313     if (!opt.version) {
 314         opt.version = "9P2000.L";
 315     }
 316
 317     string_size = v9fs_string_size(opt.version);
 318     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 319     body_size += string_size;
 320     req = v9fs_req_init(opt.client, body_size, P9_TVERSION, opt.tag);
 321
 322     v9fs_uint32_write(req, opt.msize);
 323     v9fs_string_write(req, opt.version);
 324     v9fs_req_send(req);
 325
 326     if (!opt.requestOnly) {
 327         v9fs_req_wait_for_reply(req, NULL);
 328         if (opt.expectErr) {
 329             v9fs_rlerror(req, &err);
 330             g_assert_cmpint(err, ==, opt.expectErr);
 331         } else {
 332             v9fs_rversion(req, &server_len, &server_version);
 333             g_assert_cmpmem(server_version, server_len,
 334                             opt.version, strlen(opt.version));
 335         }
 336         req = NULL; /* request was freed */
 337     }
 338
 339     return (TVersionRes) {
 340         .req = req,
 341     };
 342 }
 343
 344 /* size[4] Rversion tag[2] msize[4] version[s] */
 345 void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 346 {
 347     uint32_t msize;
 348
 349     v9fs_req_recv(req, P9_RVERSION);
 350     v9fs_uint32_read(req, &msize);
 351
 352     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 353
 354     if (len || version) {
 355         v9fs_string_read(req, len, version);
 356     }
 357
 358     v9fs_req_free(req);
 359 }
 360
 361 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 362 TAttachRes v9fs_tattach(TAttachOpt opt)
 363 {
 364     uint32_t err;
 365     const char *uname = ""; /* ignored by QEMU */
 366     const char *aname = ""; /* ignored by QEMU */
 367
 368     g_assert(opt.client);
 369     /* expecting either Rattach or Rlerror, but obviously not both */
 370     g_assert(!opt.expectErr || !opt.rattach.qid);
 371
 372     if (!opt.requestOnly) {
 373         v9fs_tversion((TVersionOpt) { .client = opt.client });
 374     }
 375
 376     if (!opt.n_uname) {
 377         opt.n_uname = getuid();
 378     }
 379
 380     P9Req *req = v9fs_req_init(opt.client, 4 + 4 + 2 + 2 + 4, P9_TATTACH,
 381                                opt.tag);
 382
 383     v9fs_uint32_write(req, opt.fid);
 384     v9fs_uint32_write(req, P9_NOFID);
 385     v9fs_string_write(req, uname);
 386     v9fs_string_write(req, aname);
 387     v9fs_uint32_write(req, opt.n_uname);
 388     v9fs_req_send(req);
 389
 390     if (!opt.requestOnly) {
 391         v9fs_req_wait_for_reply(req, NULL);
 392         if (opt.expectErr) {
 393             v9fs_rlerror(req, &err);
 394             g_assert_cmpint(err, ==, opt.expectErr);
 395         } else {
 396             v9fs_rattach(req, opt.rattach.qid);
 397         }
 398         req = NULL; /* request was freed */
 399     }
 400
 401     return (TAttachRes) {
 402         .req = req,
 403     };
 404 }
 405
 406 /* size[4] Rattach tag[2] qid[13] */
 407 void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 408 {
 409     v9fs_req_recv(req, P9_RATTACH);
 410     if (qid) {
 411         v9fs_memread(req, qid, 13);
 412     }
 413     v9fs_req_free(req);
 414 }
 415
 416 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 417 TWalkRes v9fs_twalk(TWalkOpt opt)
 418 {
 419     P9Req *req;
 420     int i;
 421     uint32_t body_size = 4 + 4 + 2;
 422     uint32_t err;
 423     char **wnames = NULL;
 424
 425     g_assert(opt.client);
 426     /* expecting either high- or low-level path, both not both */
 427     g_assert(!opt.path || !(opt.nwname || opt.wnames));
 428     /* expecting either Rwalk or Rlerror, but obviously not both */
 429     g_assert(!opt.expectErr || !(opt.rwalk.nwqid || opt.rwalk.wqid));
 430
 431     if (!opt.newfid) {
 432         opt.newfid = genfid();
 433     }
 434
 435     if (opt.path) {
 436         opt.nwname = split(opt.path, "/", &wnames);
 437         opt.wnames = wnames;
 438     }
 439
 440     for (i = 0; i < opt.nwname; i++) {
 441         uint16_t wname_size = v9fs_string_size(opt.wnames[i]);
 442
 443         g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 444         body_size += wname_size;
 445     }
 446     req = v9fs_req_init(opt.client, body_size, P9_TWALK, opt.tag);
 447     v9fs_uint32_write(req, opt.fid);
 448     v9fs_uint32_write(req, opt.newfid);
 449     v9fs_uint16_write(req, opt.nwname);
 450     for (i = 0; i < opt.nwname; i++) {
 451         v9fs_string_write(req, opt.wnames[i]);
 452     }
 453     v9fs_req_send(req);
 454
 455     if (!opt.requestOnly) {
 456         v9fs_req_wait_for_reply(req, NULL);
 457         if (opt.expectErr) {
 458             v9fs_rlerror(req, &err);
 459             g_assert_cmpint(err, ==, opt.expectErr);
 460         } else {
 461             v9fs_rwalk(req, opt.rwalk.nwqid, opt.rwalk.wqid);
 462         }
 463         req = NULL; /* request was freed */
 464     }
 465
 466     split_free(&wnames);
 467
 468     return (TWalkRes) {
 469         .newfid = opt.newfid,
 470         .req = req,
 471     };
 472 }
 473
 474 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 475 void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 476 {
 477     uint16_t local_nwqid;
 478
 479     v9fs_req_recv(req, P9_RWALK);
 480     v9fs_uint16_read(req, &local_nwqid);
 481     if (nwqid) {
 482         *nwqid = local_nwqid;
 483     }
 484     if (wqid) {
 485         *wqid = g_malloc(local_nwqid * 13);
 486         v9fs_memread(req, *wqid, local_nwqid * 13);
 487     }
 488     v9fs_req_free(req);
 489 }
 490
 491 /* size[4] Tgetattr tag[2] fid[4] request_mask[8] */
 492 TGetAttrRes v9fs_tgetattr(TGetAttrOpt opt)
 493 {
 494     P9Req *req;
 495     uint32_t err;
 496
 497     g_assert(opt.client);
 498     /* expecting either Rgetattr or Rlerror, but obviously not both */
 499     g_assert(!opt.expectErr || !opt.rgetattr.attr);
 500
 501     if (!opt.request_mask) {
 502         opt.request_mask = P9_GETATTR_ALL;
 503     }
 504
 505     req = v9fs_req_init(opt.client, 4 + 8, P9_TGETATTR, opt.tag);
 506     v9fs_uint32_write(req, opt.fid);
 507     v9fs_uint64_write(req, opt.request_mask);
 508     v9fs_req_send(req);
 509
 510     if (!opt.requestOnly) {
 511         v9fs_req_wait_for_reply(req, NULL);
 512         if (opt.expectErr) {
 513             v9fs_rlerror(req, &err);
 514             g_assert_cmpint(err, ==, opt.expectErr);
 515         } else {
 516             v9fs_rgetattr(req, opt.rgetattr.attr);
 517         }
 518         req = NULL; /* request was freed */
 519     }
 520
 521     return (TGetAttrRes) { .req = req };
 522 }
 523
 524 /*
 525  * size[4] Rgetattr tag[2] valid[8] qid[13] mode[4] uid[4] gid[4] nlink[8]
 526  *                  rdev[8] size[8] blksize[8] blocks[8]
 527  *                  atime_sec[8] atime_nsec[8] mtime_sec[8] mtime_nsec[8]
 528  *                  ctime_sec[8] ctime_nsec[8] btime_sec[8] btime_nsec[8]
 529  *                  gen[8] data_version[8]
 530  */
 531 void v9fs_rgetattr(P9Req *req, v9fs_attr *attr)
 532 {
 533     v9fs_req_recv(req, P9_RGETATTR);
 534
 535     v9fs_uint64_read(req, &attr->valid);
 536     v9fs_memread(req, &attr->qid, 13);
 537     v9fs_uint32_read(req, &attr->mode);
 538     v9fs_uint32_read(req, &attr->uid);
 539     v9fs_uint32_read(req, &attr->gid);
 540     v9fs_uint64_read(req, &attr->nlink);
 541     v9fs_uint64_read(req, &attr->rdev);
 542     v9fs_uint64_read(req, &attr->size);
 543     v9fs_uint64_read(req, &attr->blksize);
 544     v9fs_uint64_read(req, &attr->blocks);
 545     v9fs_uint64_read(req, &attr->atime_sec);
 546     v9fs_uint64_read(req, &attr->atime_nsec);
 547     v9fs_uint64_read(req, &attr->mtime_sec);
 548     v9fs_uint64_read(req, &attr->mtime_nsec);
 549     v9fs_uint64_read(req, &attr->ctime_sec);
 550     v9fs_uint64_read(req, &attr->ctime_nsec);
 551     v9fs_uint64_read(req, &attr->btime_sec);
 552     v9fs_uint64_read(req, &attr->btime_nsec);
 553     v9fs_uint64_read(req, &attr->gen);
 554     v9fs_uint64_read(req, &attr->data_version);
 555
 556     v9fs_req_free(req);
 557 }
 558
 559 /* size[4] Treaddir tag[2] fid[4] offset[8] count[4] */
 560 TReadDirRes v9fs_treaddir(TReadDirOpt opt)
 561 {
 562     P9Req *req;
 563     uint32_t err;
 564
 565     g_assert(opt.client);
 566     /* expecting either Rreaddir or Rlerror, but obviously not both */
 567     g_assert(!opt.expectErr || !(opt.rreaddir.count ||
 568              opt.rreaddir.nentries || opt.rreaddir.entries));
 569
 570     req = v9fs_req_init(opt.client, 4 + 8 + 4, P9_TREADDIR, opt.tag);
 571     v9fs_uint32_write(req, opt.fid);
 572     v9fs_uint64_write(req, opt.offset);
 573     v9fs_uint32_write(req, opt.count);
 574     v9fs_req_send(req);
 575
 576     if (!opt.requestOnly) {
 577         v9fs_req_wait_for_reply(req, NULL);
 578         if (opt.expectErr) {
 579             v9fs_rlerror(req, &err);
 580             g_assert_cmpint(err, ==, opt.expectErr);
 581         } else {
 582             v9fs_rreaddir(req, opt.rreaddir.count, opt.rreaddir.nentries,
 583                           opt.rreaddir.entries);
 584         }
 585         req = NULL; /* request was freed */
 586     }
 587
 588     return (TReadDirRes) { .req = req };
 589 }
 590
 591 /* size[4] Rreaddir tag[2] count[4] data[count] */
 592 void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries,
 593                    struct V9fsDirent **entries)
 594 {
 595     uint32_t local_count;
 596     struct V9fsDirent *e = NULL;
 597     /* only used to avoid a leak if entries was NULL */
 598     struct V9fsDirent *unused_entries = NULL;
 599     uint16_t slen;
 600     uint32_t n = 0;
 601
 602     v9fs_req_recv(req, P9_RREADDIR);
 603     v9fs_uint32_read(req, &local_count);
 604
 605     if (count) {
 606         *count = local_count;
 607     }
 608
 609     for (int32_t togo = (int32_t)local_count;
 610          togo >= 13 + 8 + 1 + 2;
 611          togo -= 13 + 8 + 1 + 2 + slen, ++n)
 612     {
 613         if (!e) {
 614             e = g_new(struct V9fsDirent, 1);
 615             if (entries) {
 616                 *entries = e;
 617             } else {
 618                 unused_entries = e;
 619             }
 620         } else {
 621             e = e->next = g_new(struct V9fsDirent, 1);
 622         }
 623         e->next = NULL;
 624         /* qid[13] offset[8] type[1] name[s] */
 625         v9fs_memread(req, &e->qid, 13);
 626         v9fs_uint64_read(req, &e->offset);
 627         v9fs_uint8_read(req, &e->type);
 628         v9fs_string_read(req, &slen, &e->name);
 629     }
 630
 631     if (nentries) {
 632         *nentries = n;
 633     }
 634
 635     v9fs_free_dirents(unused_entries);
 636     v9fs_req_free(req);
 637 }
 638
 639 void v9fs_free_dirents(struct V9fsDirent *e)
 640 {
 641     struct V9fsDirent *next = NULL;
 642
 643     for (; e; e = next) {
 644         next = e->next;
 645         g_free(e->name);
 646         g_free(e);
 647     }
 648 }
 649
 650 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 651 TLOpenRes v9fs_tlopen(TLOpenOpt opt)
 652 {
 653     P9Req *req;
 654     uint32_t err;
 655
 656     g_assert(opt.client);
 657     /* expecting either Rlopen or Rlerror, but obviously not both */
 658     g_assert(!opt.expectErr || !(opt.rlopen.qid || opt.rlopen.iounit));
 659
 660     req = v9fs_req_init(opt.client,  4 + 4, P9_TLOPEN, opt.tag);
 661     v9fs_uint32_write(req, opt.fid);
 662     v9fs_uint32_write(req, opt.flags);
 663     v9fs_req_send(req);
 664
 665     if (!opt.requestOnly) {
 666         v9fs_req_wait_for_reply(req, NULL);
 667         if (opt.expectErr) {
 668             v9fs_rlerror(req, &err);
 669             g_assert_cmpint(err, ==, opt.expectErr);
 670         } else {
 671             v9fs_rlopen(req, opt.rlopen.qid, opt.rlopen.iounit);
 672         }
 673         req = NULL; /* request was freed */
 674     }
 675
 676     return (TLOpenRes) { .req = req };
 677 }
 678
 679 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 680 void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 681 {
 682     v9fs_req_recv(req, P9_RLOPEN);
 683     if (qid) {
 684         v9fs_memread(req, qid, 13);
 685     } else {
 686         v9fs_memskip(req, 13);
 687     }
 688     if (iounit) {
 689         v9fs_uint32_read(req, iounit);
 690     }
 691     v9fs_req_free(req);
 692 }
 693
 694 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 695 TWriteRes v9fs_twrite(TWriteOpt opt)
 696 {
 697     P9Req *req;
 698     uint32_t err;
 699     uint32_t body_size = 4 + 8 + 4;
 700     uint32_t written = 0;
 701
 702     g_assert(opt.client);
 703
 704     g_assert_cmpint(body_size, <=, UINT32_MAX - opt.count);
 705     body_size += opt.count;
 706     req = v9fs_req_init(opt.client, body_size, P9_TWRITE, opt.tag);
 707     v9fs_uint32_write(req, opt.fid);
 708     v9fs_uint64_write(req, opt.offset);
 709     v9fs_uint32_write(req, opt.count);
 710     v9fs_memwrite(req, opt.data, opt.count);
 711     v9fs_req_send(req);
 712
 713     if (!opt.requestOnly) {
 714         v9fs_req_wait_for_reply(req, NULL);
 715         if (opt.expectErr) {
 716             v9fs_rlerror(req, &err);
 717             g_assert_cmpint(err, ==, opt.expectErr);
 718         } else {
 719             v9fs_rwrite(req, &written);
 720         }
 721         req = NULL; /* request was freed */
 722     }
 723
 724     return (TWriteRes) {
 725         .req = req,
 726         .count = written
 727     };
 728 }
 729
 730 /* size[4] Rwrite tag[2] count[4] */
 731 void v9fs_rwrite(P9Req *req, uint32_t *count)
 732 {
 733     v9fs_req_recv(req, P9_RWRITE);
 734     if (count) {
 735         v9fs_uint32_read(req, count);
 736     }
 737     v9fs_req_free(req);
 738 }
 739
 740 /* size[4] Tflush tag[2] oldtag[2] */
 741 TFlushRes v9fs_tflush(TFlushOpt opt)
 742 {
 743     P9Req *req;
 744     uint32_t err;
 745
 746     g_assert(opt.client);
 747
 748     req = v9fs_req_init(opt.client, 2, P9_TFLUSH, opt.tag);
 749     v9fs_uint32_write(req, opt.oldtag);
 750     v9fs_req_send(req);
 751
 752     if (!opt.requestOnly) {
 753         v9fs_req_wait_for_reply(req, NULL);
 754         if (opt.expectErr) {
 755             v9fs_rlerror(req, &err);
 756             g_assert_cmpint(err, ==, opt.expectErr);
 757         } else {
 758             v9fs_rflush(req);
 759         }
 760         req = NULL; /* request was freed */
 761     }
 762
 763     return (TFlushRes) { .req = req };
 764 }
 765
 766 /* size[4] Rflush tag[2] */
 767 void v9fs_rflush(P9Req *req)
 768 {
 769     v9fs_req_recv(req, P9_RFLUSH);
 770     v9fs_req_free(req);
 771 }
 772
 773 /* size[4] Tmkdir tag[2] dfid[4] name[s] mode[4] gid[4] */
 774 TMkdirRes v9fs_tmkdir(TMkdirOpt opt)
 775 {
 776     P9Req *req;
 777     uint32_t err;
 778
 779     g_assert(opt.client);
 780     /* expecting either hi-level atPath or low-level dfid, but not both */
 781     g_assert(!opt.atPath || !opt.dfid);
 782     /* expecting either Rmkdir or Rlerror, but obviously not both */
 783     g_assert(!opt.expectErr || !opt.rmkdir.qid);
 784
 785     if (opt.atPath) {
 786         opt.dfid = v9fs_twalk((TWalkOpt) { .client = opt.client,
 787                                            .path = opt.atPath }).newfid;
 788     }
 789
 790     if (!opt.mode) {
 791         opt.mode = 0750;
 792     }
 793
 794     uint32_t body_size = 4 + 4 + 4;
 795     uint16_t string_size = v9fs_string_size(opt.name);
 796
 797     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 798     body_size += string_size;
 799
 800     req = v9fs_req_init(opt.client, body_size, P9_TMKDIR, opt.tag);
 801     v9fs_uint32_write(req, opt.dfid);
 802     v9fs_string_write(req, opt.name);
 803     v9fs_uint32_write(req, opt.mode);
 804     v9fs_uint32_write(req, opt.gid);
 805     v9fs_req_send(req);
 806
 807     if (!opt.requestOnly) {
 808         v9fs_req_wait_for_reply(req, NULL);
 809         if (opt.expectErr) {
 810             v9fs_rlerror(req, &err);
 811             g_assert_cmpint(err, ==, opt.expectErr);
 812         } else {
 813             v9fs_rmkdir(req, opt.rmkdir.qid);
 814         }
 815         req = NULL; /* request was freed */
 816     }
 817
 818     return (TMkdirRes) { .req = req };
 819 }
 820
 821 /* size[4] Rmkdir tag[2] qid[13] */
 822 void v9fs_rmkdir(P9Req *req, v9fs_qid *qid)
 823 {
 824     v9fs_req_recv(req, P9_RMKDIR);
 825     if (qid) {
 826         v9fs_memread(req, qid, 13);
 827     } else {
 828         v9fs_memskip(req, 13);
 829     }
 830     v9fs_req_free(req);
 831 }
 832
 833 /* size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4] */
 834 TlcreateRes v9fs_tlcreate(TlcreateOpt opt)
 835 {
 836     P9Req *req;
 837     uint32_t err;
 838
 839     g_assert(opt.client);
 840     /* expecting either hi-level atPath or low-level fid, but not both */
 841     g_assert(!opt.atPath || !opt.fid);
 842     /* expecting either Rlcreate or Rlerror, but obviously not both */
 843     g_assert(!opt.expectErr || !(opt.rlcreate.qid || opt.rlcreate.iounit));
 844
 845     if (opt.atPath) {
 846         opt.fid = v9fs_twalk((TWalkOpt) { .client = opt.client,
 847                                           .path = opt.atPath }).newfid;
 848     }
 849
 850     if (!opt.mode) {
 851         opt.mode = 0750;
 852     }
 853
 854     uint32_t body_size = 4 + 4 + 4 + 4;
 855     uint16_t string_size = v9fs_string_size(opt.name);
 856
 857     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 858     body_size += string_size;
 859
 860     req = v9fs_req_init(opt.client, body_size, P9_TLCREATE, opt.tag);
 861     v9fs_uint32_write(req, opt.fid);
 862     v9fs_string_write(req, opt.name);
 863     v9fs_uint32_write(req, opt.flags);
 864     v9fs_uint32_write(req, opt.mode);
 865     v9fs_uint32_write(req, opt.gid);
 866     v9fs_req_send(req);
 867
 868     if (!opt.requestOnly) {
 869         v9fs_req_wait_for_reply(req, NULL);
 870         if (opt.expectErr) {
 871             v9fs_rlerror(req, &err);
 872             g_assert_cmpint(err, ==, opt.expectErr);
 873         } else {
 874             v9fs_rlcreate(req, opt.rlcreate.qid, opt.rlcreate.iounit);
 875         }
 876         req = NULL; /* request was freed */
 877     }
 878
 879     return (TlcreateRes) { .req = req };
 880 }
 881
 882 /* size[4] Rlcreate tag[2] qid[13] iounit[4] */
 883 void v9fs_rlcreate(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 884 {
 885     v9fs_req_recv(req, P9_RLCREATE);
 886     if (qid) {
 887         v9fs_memread(req, qid, 13);
 888     } else {
 889         v9fs_memskip(req, 13);
 890     }
 891     if (iounit) {
 892         v9fs_uint32_read(req, iounit);
 893     }
 894     v9fs_req_free(req);
 895 }
 896
 897 /* size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4] */
 898 TsymlinkRes v9fs_tsymlink(TsymlinkOpt opt)
 899 {
 900     P9Req *req;
 901     uint32_t err;
 902
 903     g_assert(opt.client);
 904     /* expecting either hi-level atPath or low-level fid, but not both */
 905     g_assert(!opt.atPath || !opt.fid);
 906     /* expecting either Rsymlink or Rlerror, but obviously not both */
 907     g_assert(!opt.expectErr || !opt.rsymlink.qid);
 908
 909     if (opt.atPath) {
 910         opt.fid = v9fs_twalk((TWalkOpt) { .client = opt.client,
 911                                           .path = opt.atPath }).newfid;
 912     }
 913
 914     uint32_t body_size = 4 + 4;
 915     uint16_t string_size = v9fs_string_size(opt.name) +
 916                            v9fs_string_size(opt.symtgt);
 917
 918     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 919     body_size += string_size;
 920
 921     req = v9fs_req_init(opt.client, body_size, P9_TSYMLINK, opt.tag);
 922     v9fs_uint32_write(req, opt.fid);
 923     v9fs_string_write(req, opt.name);
 924     v9fs_string_write(req, opt.symtgt);
 925     v9fs_uint32_write(req, opt.gid);
 926     v9fs_req_send(req);
 927
 928     if (!opt.requestOnly) {
 929         v9fs_req_wait_for_reply(req, NULL);
 930         if (opt.expectErr) {
 931             v9fs_rlerror(req, &err);
 932             g_assert_cmpint(err, ==, opt.expectErr);
 933         } else {
 934             v9fs_rsymlink(req, opt.rsymlink.qid);
 935         }
 936         req = NULL; /* request was freed */
 937     }
 938
 939     return (TsymlinkRes) { .req = req };
 940 }
 941
 942 /* size[4] Rsymlink tag[2] qid[13] */
 943 void v9fs_rsymlink(P9Req *req, v9fs_qid *qid)
 944 {
 945     v9fs_req_recv(req, P9_RSYMLINK);
 946     if (qid) {
 947         v9fs_memread(req, qid, 13);
 948     } else {
 949         v9fs_memskip(req, 13);
 950     }
 951     v9fs_req_free(req);
 952 }
 953
 954 /* size[4] Tlink tag[2] dfid[4] fid[4] name[s] */
 955 TlinkRes v9fs_tlink(TlinkOpt opt)
 956 {
 957     P9Req *req;
 958     uint32_t err;
 959
 960     g_assert(opt.client);
 961     /* expecting either hi-level atPath or low-level dfid, but not both */
 962     g_assert(!opt.atPath || !opt.dfid);
 963     /* expecting either hi-level toPath or low-level fid, but not both */
 964     g_assert(!opt.toPath || !opt.fid);
 965
 966     if (opt.atPath) {
 967         opt.dfid = v9fs_twalk((TWalkOpt) { .client = opt.client,
 968                                            .path = opt.atPath }).newfid;
 969     }
 970     if (opt.toPath) {
 971         opt.fid = v9fs_twalk((TWalkOpt) { .client = opt.client,
 972                                           .path = opt.toPath }).newfid;
 973     }
 974
 975     uint32_t body_size = 4 + 4;
 976     uint16_t string_size = v9fs_string_size(opt.name);
 977
 978     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 979     body_size += string_size;
 980
 981     req = v9fs_req_init(opt.client, body_size, P9_TLINK, opt.tag);
 982     v9fs_uint32_write(req, opt.dfid);
 983     v9fs_uint32_write(req, opt.fid);
 984     v9fs_string_write(req, opt.name);
 985     v9fs_req_send(req);
 986
 987     if (!opt.requestOnly) {
 988         v9fs_req_wait_for_reply(req, NULL);
 989         if (opt.expectErr) {
 990             v9fs_rlerror(req, &err);
 991             g_assert_cmpint(err, ==, opt.expectErr);
 992         } else {
 993             v9fs_rlink(req);
 994         }
 995         req = NULL; /* request was freed */
 996     }
 997
 998     return (TlinkRes) { .req = req };
 999 }
1000
1001 /* size[4] Rlink tag[2] */
1002 void v9fs_rlink(P9Req *req)
1003 {
1004     v9fs_req_recv(req, P9_RLINK);
1005     v9fs_req_free(req);
1006 }
1007
1008 /* size[4] Tunlinkat tag[2] dirfd[4] name[s] flags[4] */
1009 TunlinkatRes v9fs_tunlinkat(TunlinkatOpt opt)
1010 {
1011     P9Req *req;
1012     uint32_t err;
1013
1014     g_assert(opt.client);
1015     /* expecting either hi-level atPath or low-level dirfd, but not both */
1016     g_assert(!opt.atPath || !opt.dirfd);
1017
1018     if (opt.atPath) {
1019         opt.dirfd = v9fs_twalk((TWalkOpt) { .client = opt.client,
1020                                             .path = opt.atPath }).newfid;
1021     }
1022
1023     uint32_t body_size = 4 + 4;
1024     uint16_t string_size = v9fs_string_size(opt.name);
1025
1026     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
1027     body_size += string_size;
1028
1029     req = v9fs_req_init(opt.client, body_size, P9_TUNLINKAT, opt.tag);
1030     v9fs_uint32_write(req, opt.dirfd);
1031     v9fs_string_write(req, opt.name);
1032     v9fs_uint32_write(req, opt.flags);
1033     v9fs_req_send(req);
1034
1035     if (!opt.requestOnly) {
1036         v9fs_req_wait_for_reply(req, NULL);
1037         if (opt.expectErr) {
1038             v9fs_rlerror(req, &err);
1039             g_assert_cmpint(err, ==, opt.expectErr);
1040         } else {
1041             v9fs_runlinkat(req);
1042         }
1043         req = NULL; /* request was freed */
1044     }
1045
1046     return (TunlinkatRes) { .req = req };
1047 }
1048
1049 /* size[4] Runlinkat tag[2] */
1050 void v9fs_runlinkat(P9Req *req)
1051 {
1052     v9fs_req_recv(req, P9_RUNLINKAT);
1053     v9fs_req_free(req);
1054 }