tests/qtest/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-single.h"
  12 #include "qemu/module.h"
  13 #include "hw/9pfs/9p.h"
  14 #include "hw/9pfs/9p-synth.h"
  15 #include "libqos/virtio-9p.h"
  16 #include "libqos/qgraph.h"
  17
  18 #define QVIRTIO_9P_TIMEOUT_US (10 * 1000 * 1000)
  19 static QGuestAllocator *alloc;
  20
  21 /*
  22  * Used to auto generate new fids. Start with arbitrary high value to avoid
  23  * collision with hard coded fids in basic test code.
  24  */
  25 static uint32_t fid_generator = 1000;
  26
  27 static uint32_t genfid(void)
  28 {
  29     return fid_generator++;
  30 }
  31
  32 /**
  33  * Splits the @a in string by @a delim into individual (non empty) strings
  34  * and outputs them to @a out. The output array @a out is NULL terminated.
  35  *
  36  * Output array @a out must be freed by calling split_free().
  37  *
  38  * @returns number of individual elements in output array @a out (without the
  39  *          final NULL terminating element)
  40  */
  41 static int split(const char *in, const char *delim, char ***out)
  42 {
  43     int n = 0, i = 0;
  44     char *tmp, *p;
  45
  46     tmp = g_strdup(in);
  47     for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
  48         if (strlen(p) > 0) {
  49             ++n;
  50         }
  51     }
  52     g_free(tmp);
  53
  54     *out = g_new0(char *, n + 1); /* last element NULL delimiter */
  55
  56     tmp = g_strdup(in);
  57     for (p = strtok(tmp, delim); p != NULL; p = strtok(NULL, delim)) {
  58         if (strlen(p) > 0) {
  59             (*out)[i++] = g_strdup(p);
  60         }
  61     }
  62     g_free(tmp);
  63
  64     return n;
  65 }
  66
  67 static void split_free(char ***out)
  68 {
  69     int i;
  70     for (i = 0; (*out)[i]; ++i) {
  71         g_free((*out)[i]);
  72     }
  73     g_free(*out);
  74     *out = NULL;
  75 }
  76
  77 static void pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
  78 {
  79     QVirtio9P *v9p = obj;
  80     alloc = t_alloc;
  81     size_t tag_len = qvirtio_config_readw(v9p->vdev, 0);
  82     char *tag;
  83     int i;
  84
  85     g_assert_cmpint(tag_len, ==, strlen(MOUNT_TAG));
  86
  87     tag = g_malloc(tag_len);
  88     for (i = 0; i < tag_len; i++) {
  89         tag[i] = qvirtio_config_readb(v9p->vdev, i + 2);
  90     }
  91     g_assert_cmpmem(tag, tag_len, MOUNT_TAG, tag_len);
  92     g_free(tag);
  93 }
  94
  95 #define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */
  96
  97 typedef struct {
  98     QTestState *qts;
  99     QVirtio9P *v9p;
 100     uint16_t tag;
 101     uint64_t t_msg;
 102     uint32_t t_size;
 103     uint64_t r_msg;
 104     /* No r_size, it is hardcoded to P9_MAX_SIZE */
 105     size_t t_off;
 106     size_t r_off;
 107     uint32_t free_head;
 108 } P9Req;
 109
 110 static void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
 111 {
 112     qtest_memwrite(req->qts, req->t_msg + req->t_off, addr, len);
 113     req->t_off += len;
 114 }
 115
 116 static void v9fs_memskip(P9Req *req, size_t len)
 117 {
 118     req->r_off += len;
 119 }
 120
 121 static void v9fs_memread(P9Req *req, void *addr, size_t len)
 122 {
 123     qtest_memread(req->qts, req->r_msg + req->r_off, addr, len);
 124     req->r_off += len;
 125 }
 126
 127 static void v9fs_uint8_read(P9Req *req, uint8_t *val)
 128 {
 129     v9fs_memread(req, val, 1);
 130 }
 131
 132 static void v9fs_uint16_write(P9Req *req, uint16_t val)
 133 {
 134     uint16_t le_val = cpu_to_le16(val);
 135
 136     v9fs_memwrite(req, &le_val, 2);
 137 }
 138
 139 static void v9fs_uint16_read(P9Req *req, uint16_t *val)
 140 {
 141     v9fs_memread(req, val, 2);
 142     le16_to_cpus(val);
 143 }
 144
 145 static void v9fs_uint32_write(P9Req *req, uint32_t val)
 146 {
 147     uint32_t le_val = cpu_to_le32(val);
 148
 149     v9fs_memwrite(req, &le_val, 4);
 150 }
 151
 152 static void v9fs_uint64_write(P9Req *req, uint64_t val)
 153 {
 154     uint64_t le_val = cpu_to_le64(val);
 155
 156     v9fs_memwrite(req, &le_val, 8);
 157 }
 158
 159 static void v9fs_uint32_read(P9Req *req, uint32_t *val)
 160 {
 161     v9fs_memread(req, val, 4);
 162     le32_to_cpus(val);
 163 }
 164
 165 static void v9fs_uint64_read(P9Req *req, uint64_t *val)
 166 {
 167     v9fs_memread(req, val, 8);
 168     le64_to_cpus(val);
 169 }
 170
 171 /* len[2] string[len] */
 172 static uint16_t v9fs_string_size(const char *string)
 173 {
 174     size_t len = strlen(string);
 175
 176     g_assert_cmpint(len, <=, UINT16_MAX - 2);
 177
 178     return 2 + len;
 179 }
 180
 181 static void v9fs_string_write(P9Req *req, const char *string)
 182 {
 183     int len = strlen(string);
 184
 185     g_assert_cmpint(len, <=, UINT16_MAX);
 186
 187     v9fs_uint16_write(req, (uint16_t) len);
 188     v9fs_memwrite(req, string, len);
 189 }
 190
 191 static void v9fs_string_read(P9Req *req, uint16_t *len, char **string)
 192 {
 193     uint16_t local_len;
 194
 195     v9fs_uint16_read(req, &local_len);
 196     if (len) {
 197         *len = local_len;
 198     }
 199     if (string) {
 200         *string = g_malloc(local_len + 1);
 201         v9fs_memread(req, *string, local_len);
 202         (*string)[local_len] = 0;
 203     } else {
 204         v9fs_memskip(req, local_len);
 205     }
 206 }
 207
 208  typedef struct {
 209     uint32_t size;
 210     uint8_t id;
 211     uint16_t tag;
 212 } QEMU_PACKED P9Hdr;
 213
 214 static P9Req *v9fs_req_init(QVirtio9P *v9p, uint32_t size, uint8_t id,
 215                             uint16_t tag)
 216 {
 217     P9Req *req = g_new0(P9Req, 1);
 218     uint32_t total_size = 7; /* 9P header has well-known size of 7 bytes */
 219     P9Hdr hdr = {
 220         .id = id,
 221         .tag = cpu_to_le16(tag)
 222     };
 223
 224     g_assert_cmpint(total_size, <=, UINT32_MAX - size);
 225     total_size += size;
 226     hdr.size = cpu_to_le32(total_size);
 227
 228     g_assert_cmpint(total_size, <=, P9_MAX_SIZE);
 229
 230     req->qts = global_qtest;
 231     req->v9p = v9p;
 232     req->t_size = total_size;
 233     req->t_msg = guest_alloc(alloc, req->t_size);
 234     v9fs_memwrite(req, &hdr, 7);
 235     req->tag = tag;
 236     return req;
 237 }
 238
 239 static void v9fs_req_send(P9Req *req)
 240 {
 241     QVirtio9P *v9p = req->v9p;
 242
 243     req->r_msg = guest_alloc(alloc, P9_MAX_SIZE);
 244     req->free_head = qvirtqueue_add(req->qts, v9p->vq, req->t_msg, req->t_size,
 245                                     false, true);
 246     qvirtqueue_add(req->qts, v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
 247     qvirtqueue_kick(req->qts, v9p->vdev, v9p->vq, req->free_head);
 248     req->t_off = 0;
 249 }
 250
 251 static const char *rmessage_name(uint8_t id)
 252 {
 253     return
 254         id == P9_RLERROR ? "RLERROR" :
 255         id == P9_RVERSION ? "RVERSION" :
 256         id == P9_RATTACH ? "RATTACH" :
 257         id == P9_RWALK ? "RWALK" :
 258         id == P9_RLOPEN ? "RLOPEN" :
 259         id == P9_RWRITE ? "RWRITE" :
 260         id == P9_RMKDIR ? "RMKDIR" :
 261         id == P9_RLCREATE ? "RLCREATE" :
 262         id == P9_RSYMLINK ? "RSYMLINK" :
 263         id == P9_RUNLINKAT ? "RUNLINKAT" :
 264         id == P9_RFLUSH ? "RFLUSH" :
 265         id == P9_RREADDIR ? "READDIR" :
 266         "<unknown>";
 267 }
 268
 269 static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 270 {
 271     QVirtio9P *v9p = req->v9p;
 272
 273     qvirtio_wait_used_elem(req->qts, v9p->vdev, v9p->vq, req->free_head, len,
 274                            QVIRTIO_9P_TIMEOUT_US);
 275 }
 276
 277 static void v9fs_req_recv(P9Req *req, uint8_t id)
 278 {
 279     P9Hdr hdr;
 280
 281     v9fs_memread(req, &hdr, 7);
 282     hdr.size = ldl_le_p(&hdr.size);
 283     hdr.tag = lduw_le_p(&hdr.tag);
 284
 285     g_assert_cmpint(hdr.size, >=, 7);
 286     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 287     g_assert_cmpint(hdr.tag, ==, req->tag);
 288
 289     if (hdr.id != id) {
 290         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 291                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 292
 293         if (hdr.id == P9_RLERROR) {
 294             uint32_t err;
 295             v9fs_uint32_read(req, &err);
 296             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 297         }
 298     }
 299     g_assert_cmpint(hdr.id, ==, id);
 300 }
 301
 302 static void v9fs_req_free(P9Req *req)
 303 {
 304     guest_free(alloc, req->t_msg);
 305     guest_free(alloc, req->r_msg);
 306     g_free(req);
 307 }
 308
 309 /* size[4] Rlerror tag[2] ecode[4] */
 310 static void v9fs_rlerror(P9Req *req, uint32_t *err)
 311 {
 312     v9fs_req_recv(req, P9_RLERROR);
 313     v9fs_uint32_read(req, err);
 314     v9fs_req_free(req);
 315 }
 316
 317 /* size[4] Tversion tag[2] msize[4] version[s] */
 318 static P9Req *v9fs_tversion(QVirtio9P *v9p, uint32_t msize, const char *version,
 319                             uint16_t tag)
 320 {
 321     P9Req *req;
 322     uint32_t body_size = 4;
 323     uint16_t string_size = v9fs_string_size(version);
 324
 325     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 326     body_size += string_size;
 327     req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
 328
 329     v9fs_uint32_write(req, msize);
 330     v9fs_string_write(req, version);
 331     v9fs_req_send(req);
 332     return req;
 333 }
 334
 335 /* size[4] Rversion tag[2] msize[4] version[s] */
 336 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 337 {
 338     uint32_t msize;
 339
 340     v9fs_req_recv(req, P9_RVERSION);
 341     v9fs_uint32_read(req, &msize);
 342
 343     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 344
 345     if (len || version) {
 346         v9fs_string_read(req, len, version);
 347     }
 348
 349     v9fs_req_free(req);
 350 }
 351
 352 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 353 static P9Req *v9fs_tattach(QVirtio9P *v9p, uint32_t fid, uint32_t n_uname,
 354                            uint16_t tag)
 355 {
 356     const char *uname = ""; /* ignored by QEMU */
 357     const char *aname = ""; /* ignored by QEMU */
 358     P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 359
 360     v9fs_uint32_write(req, fid);
 361     v9fs_uint32_write(req, P9_NOFID);
 362     v9fs_string_write(req, uname);
 363     v9fs_string_write(req, aname);
 364     v9fs_uint32_write(req, n_uname);
 365     v9fs_req_send(req);
 366     return req;
 367 }
 368
 369 typedef char v9fs_qid[13];
 370
 371 /* size[4] Rattach tag[2] qid[13] */
 372 static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 373 {
 374     v9fs_req_recv(req, P9_RATTACH);
 375     if (qid) {
 376         v9fs_memread(req, qid, 13);
 377     }
 378     v9fs_req_free(req);
 379 }
 380
 381 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 382 static P9Req *v9fs_twalk(QVirtio9P *v9p, uint32_t fid, uint32_t newfid,
 383                          uint16_t nwname, char *const wnames[], uint16_t tag)
 384 {
 385     P9Req *req;
 386     int i;
 387     uint32_t body_size = 4 + 4 + 2;
 388
 389     for (i = 0; i < nwname; i++) {
 390         uint16_t wname_size = v9fs_string_size(wnames[i]);
 391
 392         g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 393         body_size += wname_size;
 394     }
 395     req = v9fs_req_init(v9p,  body_size, P9_TWALK, tag);
 396     v9fs_uint32_write(req, fid);
 397     v9fs_uint32_write(req, newfid);
 398     v9fs_uint16_write(req, nwname);
 399     for (i = 0; i < nwname; i++) {
 400         v9fs_string_write(req, wnames[i]);
 401     }
 402     v9fs_req_send(req);
 403     return req;
 404 }
 405
 406 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 407 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 408 {
 409     uint16_t local_nwqid;
 410
 411     v9fs_req_recv(req, P9_RWALK);
 412     v9fs_uint16_read(req, &local_nwqid);
 413     if (nwqid) {
 414         *nwqid = local_nwqid;
 415     }
 416     if (wqid) {
 417         *wqid = g_malloc(local_nwqid * 13);
 418         v9fs_memread(req, *wqid, local_nwqid * 13);
 419     }
 420     v9fs_req_free(req);
 421 }
 422
 423 /* size[4] Treaddir tag[2] fid[4] offset[8] count[4] */
 424 static P9Req *v9fs_treaddir(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 425                             uint32_t count, uint16_t tag)
 426 {
 427     P9Req *req;
 428
 429     req = v9fs_req_init(v9p, 4 + 8 + 4, P9_TREADDIR, tag);
 430     v9fs_uint32_write(req, fid);
 431     v9fs_uint64_write(req, offset);
 432     v9fs_uint32_write(req, count);
 433     v9fs_req_send(req);
 434     return req;
 435 }
 436
 437 struct V9fsDirent {
 438     v9fs_qid qid;
 439     uint64_t offset;
 440     uint8_t type;
 441     char *name;
 442     struct V9fsDirent *next;
 443 };
 444
 445 /* size[4] Rreaddir tag[2] count[4] data[count] */
 446 static void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries,
 447                           struct V9fsDirent **entries)
 448 {
 449     uint32_t local_count;
 450     struct V9fsDirent *e = NULL;
 451     uint16_t slen;
 452     uint32_t n = 0;
 453
 454     v9fs_req_recv(req, P9_RREADDIR);
 455     v9fs_uint32_read(req, &local_count);
 456
 457     if (count) {
 458         *count = local_count;
 459     }
 460
 461     for (int32_t togo = (int32_t)local_count;
 462          togo >= 13 + 8 + 1 + 2;
 463          togo -= 13 + 8 + 1 + 2 + slen, ++n)
 464     {
 465         if (!e) {
 466             e = g_malloc(sizeof(struct V9fsDirent));
 467             if (entries) {
 468                 *entries = e;
 469             }
 470         } else {
 471             e = e->next = g_malloc(sizeof(struct V9fsDirent));
 472         }
 473         e->next = NULL;
 474         /* qid[13] offset[8] type[1] name[s] */
 475         v9fs_memread(req, &e->qid, 13);
 476         v9fs_uint64_read(req, &e->offset);
 477         v9fs_uint8_read(req, &e->type);
 478         v9fs_string_read(req, &slen, &e->name);
 479     }
 480
 481     if (nentries) {
 482         *nentries = n;
 483     }
 484
 485     v9fs_req_free(req);
 486 }
 487
 488 static void v9fs_free_dirents(struct V9fsDirent *e)
 489 {
 490     struct V9fsDirent *next = NULL;
 491
 492     for (; e; e = next) {
 493         next = e->next;
 494         g_free(e->name);
 495         g_free(e);
 496     }
 497 }
 498
 499 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 500 static P9Req *v9fs_tlopen(QVirtio9P *v9p, uint32_t fid, uint32_t flags,
 501                           uint16_t tag)
 502 {
 503     P9Req *req;
 504
 505     req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 506     v9fs_uint32_write(req, fid);
 507     v9fs_uint32_write(req, flags);
 508     v9fs_req_send(req);
 509     return req;
 510 }
 511
 512 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 513 static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 514 {
 515     v9fs_req_recv(req, P9_RLOPEN);
 516     if (qid) {
 517         v9fs_memread(req, qid, 13);
 518     } else {
 519         v9fs_memskip(req, 13);
 520     }
 521     if (iounit) {
 522         v9fs_uint32_read(req, iounit);
 523     }
 524     v9fs_req_free(req);
 525 }
 526
 527 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 528 static P9Req *v9fs_twrite(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 529                           uint32_t count, const void *data, uint16_t tag)
 530 {
 531     P9Req *req;
 532     uint32_t body_size = 4 + 8 + 4;
 533
 534     g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 535     body_size += count;
 536     req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 537     v9fs_uint32_write(req, fid);
 538     v9fs_uint64_write(req, offset);
 539     v9fs_uint32_write(req, count);
 540     v9fs_memwrite(req, data, count);
 541     v9fs_req_send(req);
 542     return req;
 543 }
 544
 545 /* size[4] Rwrite tag[2] count[4] */
 546 static void v9fs_rwrite(P9Req *req, uint32_t *count)
 547 {
 548     v9fs_req_recv(req, P9_RWRITE);
 549     if (count) {
 550         v9fs_uint32_read(req, count);
 551     }
 552     v9fs_req_free(req);
 553 }
 554
 555 /* size[4] Tflush tag[2] oldtag[2] */
 556 static P9Req *v9fs_tflush(QVirtio9P *v9p, uint16_t oldtag, uint16_t tag)
 557 {
 558     P9Req *req;
 559
 560     req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 561     v9fs_uint32_write(req, oldtag);
 562     v9fs_req_send(req);
 563     return req;
 564 }
 565
 566 /* size[4] Rflush tag[2] */
 567 static void v9fs_rflush(P9Req *req)
 568 {
 569     v9fs_req_recv(req, P9_RFLUSH);
 570     v9fs_req_free(req);
 571 }
 572
 573 static void do_version(QVirtio9P *v9p)
 574 {
 575     const char *version = "9P2000.L";
 576     uint16_t server_len;
 577     char *server_version;
 578     P9Req *req;
 579
 580     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 581     v9fs_req_wait_for_reply(req, NULL);
 582     v9fs_rversion(req, &server_len, &server_version);
 583
 584     g_assert_cmpmem(server_version, server_len, version, strlen(version));
 585
 586     g_free(server_version);
 587 }
 588
 589 /* utility function: walk to requested dir and return fid for that dir */
 590 static uint32_t do_walk(QVirtio9P *v9p, const char *path)
 591 {
 592     char **wnames;
 593     P9Req *req;
 594     const uint32_t fid = genfid();
 595
 596     int nwnames = split(path, "/", &wnames);
 597
 598     req = v9fs_twalk(v9p, 0, fid, nwnames, wnames, 0);
 599     v9fs_req_wait_for_reply(req, NULL);
 600     v9fs_rwalk(req, NULL, NULL);
 601
 602     split_free(&wnames);
 603     return fid;
 604 }
 605
 606 static void fs_version(void *obj, void *data, QGuestAllocator *t_alloc)
 607 {
 608     alloc = t_alloc;
 609     do_version(obj);
 610 }
 611
 612 static void do_attach(QVirtio9P *v9p)
 613 {
 614     P9Req *req;
 615
 616     do_version(v9p);
 617     req = v9fs_tattach(v9p, 0, getuid(), 0);
 618     v9fs_req_wait_for_reply(req, NULL);
 619     v9fs_rattach(req, NULL);
 620 }
 621
 622 static void fs_attach(void *obj, void *data, QGuestAllocator *t_alloc)
 623 {
 624     alloc = t_alloc;
 625     do_attach(obj);
 626 }
 627
 628 static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
 629 {
 630     QVirtio9P *v9p = obj;
 631     alloc = t_alloc;
 632     char *wnames[P9_MAXWELEM];
 633     uint16_t nwqid;
 634     v9fs_qid *wqid;
 635     int i;
 636     P9Req *req;
 637
 638     for (i = 0; i < P9_MAXWELEM; i++) {
 639         wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 640     }
 641
 642     do_attach(v9p);
 643     req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 644     v9fs_req_wait_for_reply(req, NULL);
 645     v9fs_rwalk(req, &nwqid, &wqid);
 646
 647     g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 648
 649     for (i = 0; i < P9_MAXWELEM; i++) {
 650         g_free(wnames[i]);
 651     }
 652
 653     g_free(wqid);
 654 }
 655
 656 static bool fs_dirents_contain_name(struct V9fsDirent *e, const char* name)
 657 {
 658     for (; e; e = e->next) {
 659         if (!strcmp(e->name, name)) {
 660             return true;
 661         }
 662     }
 663     return false;
 664 }
 665
 666 /* size[4] Tmkdir tag[2] dfid[4] name[s] mode[4] gid[4] */
 667 static P9Req *v9fs_tmkdir(QVirtio9P *v9p, uint32_t dfid, const char *name,
 668                           uint32_t mode, uint32_t gid, uint16_t tag)
 669 {
 670     P9Req *req;
 671
 672     uint32_t body_size = 4 + 4 + 4;
 673     uint16_t string_size = v9fs_string_size(name);
 674
 675     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 676     body_size += string_size;
 677
 678     req = v9fs_req_init(v9p, body_size, P9_TMKDIR, tag);
 679     v9fs_uint32_write(req, dfid);
 680     v9fs_string_write(req, name);
 681     v9fs_uint32_write(req, mode);
 682     v9fs_uint32_write(req, gid);
 683     v9fs_req_send(req);
 684     return req;
 685 }
 686
 687 /* size[4] Rmkdir tag[2] qid[13] */
 688 static void v9fs_rmkdir(P9Req *req, v9fs_qid *qid)
 689 {
 690     v9fs_req_recv(req, P9_RMKDIR);
 691     if (qid) {
 692         v9fs_memread(req, qid, 13);
 693     } else {
 694         v9fs_memskip(req, 13);
 695     }
 696     v9fs_req_free(req);
 697 }
 698
 699 /* size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4] */
 700 static P9Req *v9fs_tlcreate(QVirtio9P *v9p, uint32_t fid, const char *name,
 701                             uint32_t flags, uint32_t mode, uint32_t gid,
 702                             uint16_t tag)
 703 {
 704     P9Req *req;
 705
 706     uint32_t body_size = 4 + 4 + 4 + 4;
 707     uint16_t string_size = v9fs_string_size(name);
 708
 709     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 710     body_size += string_size;
 711
 712     req = v9fs_req_init(v9p, body_size, P9_TLCREATE, tag);
 713     v9fs_uint32_write(req, fid);
 714     v9fs_string_write(req, name);
 715     v9fs_uint32_write(req, flags);
 716     v9fs_uint32_write(req, mode);
 717     v9fs_uint32_write(req, gid);
 718     v9fs_req_send(req);
 719     return req;
 720 }
 721
 722 /* size[4] Rlcreate tag[2] qid[13] iounit[4] */
 723 static void v9fs_rlcreate(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 724 {
 725     v9fs_req_recv(req, P9_RLCREATE);
 726     if (qid) {
 727         v9fs_memread(req, qid, 13);
 728     } else {
 729         v9fs_memskip(req, 13);
 730     }
 731     if (iounit) {
 732         v9fs_uint32_read(req, iounit);
 733     }
 734     v9fs_req_free(req);
 735 }
 736
 737 /* size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4] */
 738 static P9Req *v9fs_tsymlink(QVirtio9P *v9p, uint32_t fid, const char *name,
 739                             const char *symtgt, uint32_t gid, uint16_t tag)
 740 {
 741     P9Req *req;
 742
 743     uint32_t body_size = 4 + 4;
 744     uint16_t string_size = v9fs_string_size(name) + v9fs_string_size(symtgt);
 745
 746     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 747     body_size += string_size;
 748
 749     req = v9fs_req_init(v9p, body_size, P9_TSYMLINK, tag);
 750     v9fs_uint32_write(req, fid);
 751     v9fs_string_write(req, name);
 752     v9fs_string_write(req, symtgt);
 753     v9fs_uint32_write(req, gid);
 754     v9fs_req_send(req);
 755     return req;
 756 }
 757
 758 /* size[4] Rsymlink tag[2] qid[13] */
 759 static void v9fs_rsymlink(P9Req *req, v9fs_qid *qid)
 760 {
 761     v9fs_req_recv(req, P9_RSYMLINK);
 762     if (qid) {
 763         v9fs_memread(req, qid, 13);
 764     } else {
 765         v9fs_memskip(req, 13);
 766     }
 767     v9fs_req_free(req);
 768 }
 769
 770 /* size[4] Tunlinkat tag[2] dirfd[4] name[s] flags[4] */
 771 static P9Req *v9fs_tunlinkat(QVirtio9P *v9p, uint32_t dirfd, const char *name,
 772                              uint32_t flags, uint16_t tag)
 773 {
 774     P9Req *req;
 775
 776     uint32_t body_size = 4 + 4;
 777     uint16_t string_size = v9fs_string_size(name);
 778
 779     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 780     body_size += string_size;
 781
 782     req = v9fs_req_init(v9p, body_size, P9_TUNLINKAT, tag);
 783     v9fs_uint32_write(req, dirfd);
 784     v9fs_string_write(req, name);
 785     v9fs_uint32_write(req, flags);
 786     v9fs_req_send(req);
 787     return req;
 788 }
 789
 790 /* size[4] Runlinkat tag[2] */
 791 static void v9fs_runlinkat(P9Req *req)
 792 {
 793     v9fs_req_recv(req, P9_RUNLINKAT);
 794     v9fs_req_free(req);
 795 }
 796
 797 /* basic readdir test where reply fits into a single response message */
 798 static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
 799 {
 800     QVirtio9P *v9p = obj;
 801     alloc = t_alloc;
 802     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 803     uint16_t nqid;
 804     v9fs_qid qid;
 805     uint32_t count, nentries;
 806     struct V9fsDirent *entries = NULL;
 807     P9Req *req;
 808
 809     do_attach(v9p);
 810     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 811     v9fs_req_wait_for_reply(req, NULL);
 812     v9fs_rwalk(req, &nqid, NULL);
 813     g_assert_cmpint(nqid, ==, 1);
 814
 815     req = v9fs_tlopen(v9p, 1, O_DIRECTORY, 0);
 816     v9fs_req_wait_for_reply(req, NULL);
 817     v9fs_rlopen(req, &qid, NULL);
 818
 819     /*
 820      * submit count = msize - 11, because 11 is the header size of Rreaddir
 821      */
 822     req = v9fs_treaddir(v9p, 1, 0, P9_MAX_SIZE - 11, 0);
 823     v9fs_req_wait_for_reply(req, NULL);
 824     v9fs_rreaddir(req, &count, &nentries, &entries);
 825
 826     /*
 827      * Assuming msize (P9_MAX_SIZE) is large enough so we can retrieve all
 828      * dir entries with only one readdir request.
 829      */
 830     g_assert_cmpint(
 831         nentries, ==,
 832         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 833     );
 834
 835     /*
 836      * Check all file names exist in returned entries, ignore their order
 837      * though.
 838      */
 839     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 840     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 841     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 842         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 843         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 844         g_free(name);
 845     }
 846
 847     v9fs_free_dirents(entries);
 848     g_free(wnames[0]);
 849 }
 850
 851 /* readdir test where overall request is split over several messages */
 852 static void do_readdir_split(QVirtio9P *v9p, uint32_t count)
 853 {
 854     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 855     uint16_t nqid;
 856     v9fs_qid qid;
 857     uint32_t nentries, npartialentries;
 858     struct V9fsDirent *entries, *tail, *partialentries;
 859     P9Req *req;
 860     int fid;
 861     uint64_t offset;
 862
 863     do_attach(v9p);
 864
 865     fid = 1;
 866     offset = 0;
 867     entries = NULL;
 868     nentries = 0;
 869     tail = NULL;
 870
 871     req = v9fs_twalk(v9p, 0, fid, 1, wnames, 0);
 872     v9fs_req_wait_for_reply(req, NULL);
 873     v9fs_rwalk(req, &nqid, NULL);
 874     g_assert_cmpint(nqid, ==, 1);
 875
 876     req = v9fs_tlopen(v9p, fid, O_DIRECTORY, 0);
 877     v9fs_req_wait_for_reply(req, NULL);
 878     v9fs_rlopen(req, &qid, NULL);
 879
 880     /*
 881      * send as many Treaddir requests as required to get all directory
 882      * entries
 883      */
 884     while (true) {
 885         npartialentries = 0;
 886         partialentries = NULL;
 887
 888         req = v9fs_treaddir(v9p, fid, offset, count, 0);
 889         v9fs_req_wait_for_reply(req, NULL);
 890         v9fs_rreaddir(req, &count, &npartialentries, &partialentries);
 891         if (npartialentries > 0 && partialentries) {
 892             if (!entries) {
 893                 entries = partialentries;
 894                 nentries = npartialentries;
 895                 tail = partialentries;
 896             } else {
 897                 tail->next = partialentries;
 898                 nentries += npartialentries;
 899             }
 900             while (tail->next) {
 901                 tail = tail->next;
 902             }
 903             offset = tail->offset;
 904         } else {
 905             break;
 906         }
 907     }
 908
 909     g_assert_cmpint(
 910         nentries, ==,
 911         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 912     );
 913
 914     /*
 915      * Check all file names exist in returned entries, ignore their order
 916      * though.
 917      */
 918     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 919     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 920     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 921         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 922         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 923         g_free(name);
 924     }
 925
 926     v9fs_free_dirents(entries);
 927
 928     g_free(wnames[0]);
 929 }
 930
 931 static void fs_walk_no_slash(void *obj, void *data, QGuestAllocator *t_alloc)
 932 {
 933     QVirtio9P *v9p = obj;
 934     alloc = t_alloc;
 935     char *const wnames[] = { g_strdup(" /") };
 936     P9Req *req;
 937     uint32_t err;
 938
 939     do_attach(v9p);
 940     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 941     v9fs_req_wait_for_reply(req, NULL);
 942     v9fs_rlerror(req, &err);
 943
 944     g_assert_cmpint(err, ==, ENOENT);
 945
 946     g_free(wnames[0]);
 947 }
 948
 949 static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
 950 {
 951     QVirtio9P *v9p = obj;
 952     alloc = t_alloc;
 953     char *const wnames[] = { g_strdup("..") };
 954     v9fs_qid root_qid, *wqid;
 955     P9Req *req;
 956
 957     do_version(v9p);
 958     req = v9fs_tattach(v9p, 0, getuid(), 0);
 959     v9fs_req_wait_for_reply(req, NULL);
 960     v9fs_rattach(req, &root_qid);
 961
 962     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 963     v9fs_req_wait_for_reply(req, NULL);
 964     v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 965
 966     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 967
 968     g_free(wqid);
 969     g_free(wnames[0]);
 970 }
 971
 972 static void fs_lopen(void *obj, void *data, QGuestAllocator *t_alloc)
 973 {
 974     QVirtio9P *v9p = obj;
 975     alloc = t_alloc;
 976     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
 977     P9Req *req;
 978
 979     do_attach(v9p);
 980     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 981     v9fs_req_wait_for_reply(req, NULL);
 982     v9fs_rwalk(req, NULL, NULL);
 983
 984     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 985     v9fs_req_wait_for_reply(req, NULL);
 986     v9fs_rlopen(req, NULL, NULL);
 987
 988     g_free(wnames[0]);
 989 }
 990
 991 static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
 992 {
 993     QVirtio9P *v9p = obj;
 994     alloc = t_alloc;
 995     static const uint32_t write_count = P9_MAX_SIZE / 2;
 996     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
 997     char *buf = g_malloc0(write_count);
 998     uint32_t count;
 999     P9Req *req;
1000
1001     do_attach(v9p);
1002     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1003     v9fs_req_wait_for_reply(req, NULL);
1004     v9fs_rwalk(req, NULL, NULL);
1005
1006     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1007     v9fs_req_wait_for_reply(req, NULL);
1008     v9fs_rlopen(req, NULL, NULL);
1009
1010     req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
1011     v9fs_req_wait_for_reply(req, NULL);
1012     v9fs_rwrite(req, &count);
1013     g_assert_cmpint(count, ==, write_count);
1014
1015     g_free(buf);
1016     g_free(wnames[0]);
1017 }
1018
1019 static void fs_flush_success(void *obj, void *data, QGuestAllocator *t_alloc)
1020 {
1021     QVirtio9P *v9p = obj;
1022     alloc = t_alloc;
1023     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
1024     P9Req *req, *flush_req;
1025     uint32_t reply_len;
1026     uint8_t should_block;
1027
1028     do_attach(v9p);
1029     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1030     v9fs_req_wait_for_reply(req, NULL);
1031     v9fs_rwalk(req, NULL, NULL);
1032
1033     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1034     v9fs_req_wait_for_reply(req, NULL);
1035     v9fs_rlopen(req, NULL, NULL);
1036
1037     /* This will cause the 9p server to try to write data to the backend,
1038      * until the write request gets cancelled.
1039      */
1040     should_block = 1;
1041     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
1042
1043     flush_req = v9fs_tflush(v9p, req->tag, 1);
1044
1045     /* The write request is supposed to be flushed: the server should just
1046      * mark the write request as used and reply to the flush request.
1047      */
1048     v9fs_req_wait_for_reply(req, &reply_len);
1049     g_assert_cmpint(reply_len, ==, 0);
1050     v9fs_req_free(req);
1051     v9fs_rflush(flush_req);
1052
1053     g_free(wnames[0]);
1054 }
1055
1056 static void fs_flush_ignored(void *obj, void *data, QGuestAllocator *t_alloc)
1057 {
1058     QVirtio9P *v9p = obj;
1059     alloc = t_alloc;
1060     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
1061     P9Req *req, *flush_req;
1062     uint32_t count;
1063     uint8_t should_block;
1064
1065     do_attach(v9p);
1066     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1067     v9fs_req_wait_for_reply(req, NULL);
1068     v9fs_rwalk(req, NULL, NULL);
1069
1070     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1071     v9fs_req_wait_for_reply(req, NULL);
1072     v9fs_rlopen(req, NULL, NULL);
1073
1074     /* This will cause the write request to complete right away, before it
1075      * could be actually cancelled.
1076      */
1077     should_block = 0;
1078     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
1079
1080     flush_req = v9fs_tflush(v9p, req->tag, 1);
1081
1082     /* The write request is supposed to complete. The server should
1083      * reply to the write request and the flush request.
1084      */
1085     v9fs_req_wait_for_reply(req, NULL);
1086     v9fs_rwrite(req, &count);
1087     g_assert_cmpint(count, ==, sizeof(should_block));
1088     v9fs_rflush(flush_req);
1089
1090     g_free(wnames[0]);
1091 }
1092
1093 static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
1094 {
1095     char *const name = g_strdup(cname);
1096     uint32_t fid;
1097     P9Req *req;
1098
1099     fid = do_walk(v9p, path);
1100
1101     req = v9fs_tmkdir(v9p, fid, name, 0750, 0, 0);
1102     v9fs_req_wait_for_reply(req, NULL);
1103     v9fs_rmkdir(req, NULL);
1104
1105     g_free(name);
1106 }
1107
1108 /* create a regular file with Tlcreate and return file's fid */
1109 static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
1110                            const char *cname)
1111 {
1112     char *const name = g_strdup(cname);
1113     uint32_t fid;
1114     P9Req *req;
1115
1116     fid = do_walk(v9p, path);
1117
1118     req = v9fs_tlcreate(v9p, fid, name, 0, 0750, 0, 0);
1119     v9fs_req_wait_for_reply(req, NULL);
1120     v9fs_rlcreate(req, NULL, NULL);
1121
1122     g_free(name);
1123     return fid;
1124 }
1125
1126 /* create symlink named @a clink in directory @a path pointing to @a to */
1127 static void do_symlink(QVirtio9P *v9p, const char *path, const char *clink,
1128                        const char *to)
1129 {
1130     char *const name = g_strdup(clink);
1131     char *const dst = g_strdup(to);
1132     uint32_t fid;
1133     P9Req *req;
1134
1135     fid = do_walk(v9p, path);
1136
1137     req = v9fs_tsymlink(v9p, fid, name, dst, 0, 0);
1138     v9fs_req_wait_for_reply(req, NULL);
1139     v9fs_rsymlink(req, NULL);
1140
1141     g_free(dst);
1142     g_free(name);
1143 }
1144
1145 static void do_unlinkat(QVirtio9P *v9p, const char *atpath, const char *rpath,
1146                         uint32_t flags)
1147 {
1148     char *const name = g_strdup(rpath);
1149     uint32_t fid;
1150     P9Req *req;
1151
1152     fid = do_walk(v9p, atpath);
1153
1154     req = v9fs_tunlinkat(v9p, fid, name, flags, 0);
1155     v9fs_req_wait_for_reply(req, NULL);
1156     v9fs_runlinkat(req);
1157
1158     g_free(name);
1159 }
1160
1161 static void fs_readdir_split_128(void *obj, void *data,
1162                                  QGuestAllocator *t_alloc)
1163 {
1164     alloc = t_alloc;
1165     do_readdir_split(obj, 128);
1166 }
1167
1168 static void fs_readdir_split_256(void *obj, void *data,
1169                                  QGuestAllocator *t_alloc)
1170 {
1171     alloc = t_alloc;
1172     do_readdir_split(obj, 256);
1173 }
1174
1175 static void fs_readdir_split_512(void *obj, void *data,
1176                                  QGuestAllocator *t_alloc)
1177 {
1178     alloc = t_alloc;
1179     do_readdir_split(obj, 512);
1180 }
1181
1182
1183 /* tests using the 9pfs 'local' fs driver */
1184
1185 static void fs_create_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1186 {
1187     QVirtio9P *v9p = obj;
1188     alloc = t_alloc;
1189     struct stat st;
1190     char *root_path = virtio_9p_test_path("");
1191     char *new_dir = virtio_9p_test_path("01");
1192
1193     g_assert(root_path != NULL);
1194
1195     do_attach(v9p);
1196     do_mkdir(v9p, "/", "01");
1197
1198     /* check if created directory really exists now ... */
1199     g_assert(stat(new_dir, &st) == 0);
1200     /* ... and is actually a directory */
1201     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1202
1203     g_free(new_dir);
1204     g_free(root_path);
1205 }
1206
1207 static void fs_unlinkat_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1208 {
1209     QVirtio9P *v9p = obj;
1210     alloc = t_alloc;
1211     struct stat st;
1212     char *root_path = virtio_9p_test_path("");
1213     char *new_dir = virtio_9p_test_path("02");
1214
1215     g_assert(root_path != NULL);
1216
1217     do_attach(v9p);
1218     do_mkdir(v9p, "/", "02");
1219
1220     /* check if created directory really exists now ... */
1221     g_assert(stat(new_dir, &st) == 0);
1222     /* ... and is actually a directory */
1223     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1224
1225     do_unlinkat(v9p, "/", "02", AT_REMOVEDIR);
1226     /* directory should be gone now */
1227     g_assert(stat(new_dir, &st) != 0);
1228
1229     g_free(new_dir);
1230     g_free(root_path);
1231 }
1232
1233 static void fs_create_file(void *obj, void *data, QGuestAllocator *t_alloc)
1234 {
1235     QVirtio9P *v9p = obj;
1236     alloc = t_alloc;
1237     struct stat st;
1238     char *new_file = virtio_9p_test_path("03/1st_file");
1239
1240     do_attach(v9p);
1241     do_mkdir(v9p, "/", "03");
1242     do_lcreate(v9p, "03", "1st_file");
1243
1244     /* check if created file exists now ... */
1245     g_assert(stat(new_file, &st) == 0);
1246     /* ... and is a regular file */
1247     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1248
1249     g_free(new_file);
1250 }
1251
1252 static void fs_unlinkat_file(void *obj, void *data, QGuestAllocator *t_alloc)
1253 {
1254     QVirtio9P *v9p = obj;
1255     alloc = t_alloc;
1256     struct stat st;
1257     char *new_file = virtio_9p_test_path("04/doa_file");
1258
1259     do_attach(v9p);
1260     do_mkdir(v9p, "/", "04");
1261     do_lcreate(v9p, "04", "doa_file");
1262
1263     /* check if created file exists now ... */
1264     g_assert(stat(new_file, &st) == 0);
1265     /* ... and is a regular file */
1266     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1267
1268     do_unlinkat(v9p, "04", "doa_file", 0);
1269     /* file should be gone now */
1270     g_assert(stat(new_file, &st) != 0);
1271
1272     g_free(new_file);
1273 }
1274
1275 static void fs_symlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
1276 {
1277     QVirtio9P *v9p = obj;
1278     alloc = t_alloc;
1279     struct stat st;
1280     char *real_file = virtio_9p_test_path("05/real_file");
1281     char *symlink_file = virtio_9p_test_path("05/symlink_file");
1282
1283     do_attach(v9p);
1284     do_mkdir(v9p, "/", "05");
1285     do_lcreate(v9p, "05", "real_file");
1286     g_assert(stat(real_file, &st) == 0);
1287     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1288
1289     do_symlink(v9p, "05", "symlink_file", "real_file");
1290
1291     /* check if created link exists now */
1292     g_assert(stat(symlink_file, &st) == 0);
1293
1294     g_free(symlink_file);
1295     g_free(real_file);
1296 }
1297
1298 static void fs_unlinkat_symlink(void *obj, void *data,
1299                                 QGuestAllocator *t_alloc)
1300 {
1301     QVirtio9P *v9p = obj;
1302     alloc = t_alloc;
1303     struct stat st;
1304     char *real_file = virtio_9p_test_path("06/real_file");
1305     char *symlink_file = virtio_9p_test_path("06/symlink_file");
1306
1307     do_attach(v9p);
1308     do_mkdir(v9p, "/", "06");
1309     do_lcreate(v9p, "06", "real_file");
1310     g_assert(stat(real_file, &st) == 0);
1311     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1312
1313     do_symlink(v9p, "06", "symlink_file", "real_file");
1314     g_assert(stat(symlink_file, &st) == 0);
1315
1316     do_unlinkat(v9p, "06", "symlink_file", 0);
1317     /* symlink should be gone now */
1318     g_assert(stat(symlink_file, &st) != 0);
1319
1320     g_free(symlink_file);
1321     g_free(real_file);
1322 }
1323
1324 static void *assign_9p_local_driver(GString *cmd_line, void *arg)
1325 {
1326     virtio_9p_assign_local_driver(cmd_line, "security_model=mapped-xattr");
1327     return arg;
1328 }
1329
1330 static void register_virtio_9p_test(void)
1331 {
1332
1333     QOSGraphTestOptions opts = {
1334     };
1335
1336     /* 9pfs test cases using the 'synth' filesystem driver */
1337     qos_add_test("synth/config", "virtio-9p", pci_config, &opts);
1338     qos_add_test("synth/version/basic", "virtio-9p", fs_version,  &opts);
1339     qos_add_test("synth/attach/basic", "virtio-9p", fs_attach,  &opts);
1340     qos_add_test("synth/walk/basic", "virtio-9p", fs_walk,  &opts);
1341     qos_add_test("synth/walk/no_slash", "virtio-9p", fs_walk_no_slash,
1342                   &opts);
1343     qos_add_test("synth/walk/dotdot_from_root", "virtio-9p",
1344                  fs_walk_dotdot,  &opts);
1345     qos_add_test("synth/lopen/basic", "virtio-9p", fs_lopen,  &opts);
1346     qos_add_test("synth/write/basic", "virtio-9p", fs_write,  &opts);
1347     qos_add_test("synth/flush/success", "virtio-9p", fs_flush_success,
1348                   &opts);
1349     qos_add_test("synth/flush/ignored", "virtio-9p", fs_flush_ignored,
1350                   &opts);
1351     qos_add_test("synth/readdir/basic", "virtio-9p", fs_readdir,  &opts);
1352     qos_add_test("synth/readdir/split_512", "virtio-9p",
1353                  fs_readdir_split_512,  &opts);
1354     qos_add_test("synth/readdir/split_256", "virtio-9p",
1355                  fs_readdir_split_256,  &opts);
1356     qos_add_test("synth/readdir/split_128", "virtio-9p",
1357                  fs_readdir_split_128,  &opts);
1358
1359
1360     /* 9pfs test cases using the 'local' filesystem driver */
1361     opts.before = assign_9p_local_driver;
1362     qos_add_test("local/config", "virtio-9p", pci_config,  &opts);
1363     qos_add_test("local/create_dir", "virtio-9p", fs_create_dir, &opts);
1364     qos_add_test("local/unlinkat_dir", "virtio-9p", fs_unlinkat_dir, &opts);
1365     qos_add_test("local/create_file", "virtio-9p", fs_create_file, &opts);
1366     qos_add_test("local/unlinkat_file", "virtio-9p", fs_unlinkat_file, &opts);
1367     qos_add_test("local/symlink_file", "virtio-9p", fs_symlink_file, &opts);
1368     qos_add_test("local/unlinkat_symlink", "virtio-9p", fs_unlinkat_symlink,
1369                  &opts);
1370 }
1371
1372 libqos_init(register_virtio_9p_test);
1373
1374 static void __attribute__((constructor)) construct_9p_test(void)
1375 {
1376     /* make sure test dir for the 'local' tests exists */
1377     virtio_9p_create_local_test_dir();
1378 }
1379
1380 static void __attribute__((destructor)) destruct_9p_test(void)
1381 {
1382     /* remove previously created test dir when test suite completed */
1383     virtio_9p_remove_local_test_dir();
1384 }