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_RLINK ? "RLINK" :
 264         id == P9_RUNLINKAT ? "RUNLINKAT" :
 265         id == P9_RFLUSH ? "RFLUSH" :
 266         id == P9_RREADDIR ? "READDIR" :
 267         "<unknown>";
 268 }
 269
 270 static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 271 {
 272     QVirtio9P *v9p = req->v9p;
 273
 274     qvirtio_wait_used_elem(req->qts, v9p->vdev, v9p->vq, req->free_head, len,
 275                            QVIRTIO_9P_TIMEOUT_US);
 276 }
 277
 278 static void v9fs_req_recv(P9Req *req, uint8_t id)
 279 {
 280     P9Hdr hdr;
 281
 282     v9fs_memread(req, &hdr, 7);
 283     hdr.size = ldl_le_p(&hdr.size);
 284     hdr.tag = lduw_le_p(&hdr.tag);
 285
 286     g_assert_cmpint(hdr.size, >=, 7);
 287     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 288     g_assert_cmpint(hdr.tag, ==, req->tag);
 289
 290     if (hdr.id != id) {
 291         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 292                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 293
 294         if (hdr.id == P9_RLERROR) {
 295             uint32_t err;
 296             v9fs_uint32_read(req, &err);
 297             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 298         }
 299     }
 300     g_assert_cmpint(hdr.id, ==, id);
 301 }
 302
 303 static void v9fs_req_free(P9Req *req)
 304 {
 305     guest_free(alloc, req->t_msg);
 306     guest_free(alloc, req->r_msg);
 307     g_free(req);
 308 }
 309
 310 /* size[4] Rlerror tag[2] ecode[4] */
 311 static void v9fs_rlerror(P9Req *req, uint32_t *err)
 312 {
 313     v9fs_req_recv(req, P9_RLERROR);
 314     v9fs_uint32_read(req, err);
 315     v9fs_req_free(req);
 316 }
 317
 318 /* size[4] Tversion tag[2] msize[4] version[s] */
 319 static P9Req *v9fs_tversion(QVirtio9P *v9p, uint32_t msize, const char *version,
 320                             uint16_t tag)
 321 {
 322     P9Req *req;
 323     uint32_t body_size = 4;
 324     uint16_t string_size = v9fs_string_size(version);
 325
 326     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 327     body_size += string_size;
 328     req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
 329
 330     v9fs_uint32_write(req, msize);
 331     v9fs_string_write(req, version);
 332     v9fs_req_send(req);
 333     return req;
 334 }
 335
 336 /* size[4] Rversion tag[2] msize[4] version[s] */
 337 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 338 {
 339     uint32_t msize;
 340
 341     v9fs_req_recv(req, P9_RVERSION);
 342     v9fs_uint32_read(req, &msize);
 343
 344     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 345
 346     if (len || version) {
 347         v9fs_string_read(req, len, version);
 348     }
 349
 350     v9fs_req_free(req);
 351 }
 352
 353 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 354 static P9Req *v9fs_tattach(QVirtio9P *v9p, uint32_t fid, uint32_t n_uname,
 355                            uint16_t tag)
 356 {
 357     const char *uname = ""; /* ignored by QEMU */
 358     const char *aname = ""; /* ignored by QEMU */
 359     P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 360
 361     v9fs_uint32_write(req, fid);
 362     v9fs_uint32_write(req, P9_NOFID);
 363     v9fs_string_write(req, uname);
 364     v9fs_string_write(req, aname);
 365     v9fs_uint32_write(req, n_uname);
 366     v9fs_req_send(req);
 367     return req;
 368 }
 369
 370 typedef char v9fs_qid[13];
 371
 372 /* size[4] Rattach tag[2] qid[13] */
 373 static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 374 {
 375     v9fs_req_recv(req, P9_RATTACH);
 376     if (qid) {
 377         v9fs_memread(req, qid, 13);
 378     }
 379     v9fs_req_free(req);
 380 }
 381
 382 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 383 static P9Req *v9fs_twalk(QVirtio9P *v9p, uint32_t fid, uint32_t newfid,
 384                          uint16_t nwname, char *const wnames[], uint16_t tag)
 385 {
 386     P9Req *req;
 387     int i;
 388     uint32_t body_size = 4 + 4 + 2;
 389
 390     for (i = 0; i < nwname; i++) {
 391         uint16_t wname_size = v9fs_string_size(wnames[i]);
 392
 393         g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 394         body_size += wname_size;
 395     }
 396     req = v9fs_req_init(v9p,  body_size, P9_TWALK, tag);
 397     v9fs_uint32_write(req, fid);
 398     v9fs_uint32_write(req, newfid);
 399     v9fs_uint16_write(req, nwname);
 400     for (i = 0; i < nwname; i++) {
 401         v9fs_string_write(req, wnames[i]);
 402     }
 403     v9fs_req_send(req);
 404     return req;
 405 }
 406
 407 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 408 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 409 {
 410     uint16_t local_nwqid;
 411
 412     v9fs_req_recv(req, P9_RWALK);
 413     v9fs_uint16_read(req, &local_nwqid);
 414     if (nwqid) {
 415         *nwqid = local_nwqid;
 416     }
 417     if (wqid) {
 418         *wqid = g_malloc(local_nwqid * 13);
 419         v9fs_memread(req, *wqid, local_nwqid * 13);
 420     }
 421     v9fs_req_free(req);
 422 }
 423
 424 /* size[4] Treaddir tag[2] fid[4] offset[8] count[4] */
 425 static P9Req *v9fs_treaddir(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 426                             uint32_t count, uint16_t tag)
 427 {
 428     P9Req *req;
 429
 430     req = v9fs_req_init(v9p, 4 + 8 + 4, P9_TREADDIR, tag);
 431     v9fs_uint32_write(req, fid);
 432     v9fs_uint64_write(req, offset);
 433     v9fs_uint32_write(req, count);
 434     v9fs_req_send(req);
 435     return req;
 436 }
 437
 438 struct V9fsDirent {
 439     v9fs_qid qid;
 440     uint64_t offset;
 441     uint8_t type;
 442     char *name;
 443     struct V9fsDirent *next;
 444 };
 445
 446 /* size[4] Rreaddir tag[2] count[4] data[count] */
 447 static void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries,
 448                           struct V9fsDirent **entries)
 449 {
 450     uint32_t local_count;
 451     struct V9fsDirent *e = NULL;
 452     uint16_t slen;
 453     uint32_t n = 0;
 454
 455     v9fs_req_recv(req, P9_RREADDIR);
 456     v9fs_uint32_read(req, &local_count);
 457
 458     if (count) {
 459         *count = local_count;
 460     }
 461
 462     for (int32_t togo = (int32_t)local_count;
 463          togo >= 13 + 8 + 1 + 2;
 464          togo -= 13 + 8 + 1 + 2 + slen, ++n)
 465     {
 466         if (!e) {
 467             e = g_malloc(sizeof(struct V9fsDirent));
 468             if (entries) {
 469                 *entries = e;
 470             }
 471         } else {
 472             e = e->next = g_malloc(sizeof(struct V9fsDirent));
 473         }
 474         e->next = NULL;
 475         /* qid[13] offset[8] type[1] name[s] */
 476         v9fs_memread(req, &e->qid, 13);
 477         v9fs_uint64_read(req, &e->offset);
 478         v9fs_uint8_read(req, &e->type);
 479         v9fs_string_read(req, &slen, &e->name);
 480     }
 481
 482     if (nentries) {
 483         *nentries = n;
 484     }
 485
 486     v9fs_req_free(req);
 487 }
 488
 489 static void v9fs_free_dirents(struct V9fsDirent *e)
 490 {
 491     struct V9fsDirent *next = NULL;
 492
 493     for (; e; e = next) {
 494         next = e->next;
 495         g_free(e->name);
 496         g_free(e);
 497     }
 498 }
 499
 500 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 501 static P9Req *v9fs_tlopen(QVirtio9P *v9p, uint32_t fid, uint32_t flags,
 502                           uint16_t tag)
 503 {
 504     P9Req *req;
 505
 506     req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 507     v9fs_uint32_write(req, fid);
 508     v9fs_uint32_write(req, flags);
 509     v9fs_req_send(req);
 510     return req;
 511 }
 512
 513 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 514 static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 515 {
 516     v9fs_req_recv(req, P9_RLOPEN);
 517     if (qid) {
 518         v9fs_memread(req, qid, 13);
 519     } else {
 520         v9fs_memskip(req, 13);
 521     }
 522     if (iounit) {
 523         v9fs_uint32_read(req, iounit);
 524     }
 525     v9fs_req_free(req);
 526 }
 527
 528 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 529 static P9Req *v9fs_twrite(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 530                           uint32_t count, const void *data, uint16_t tag)
 531 {
 532     P9Req *req;
 533     uint32_t body_size = 4 + 8 + 4;
 534
 535     g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 536     body_size += count;
 537     req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 538     v9fs_uint32_write(req, fid);
 539     v9fs_uint64_write(req, offset);
 540     v9fs_uint32_write(req, count);
 541     v9fs_memwrite(req, data, count);
 542     v9fs_req_send(req);
 543     return req;
 544 }
 545
 546 /* size[4] Rwrite tag[2] count[4] */
 547 static void v9fs_rwrite(P9Req *req, uint32_t *count)
 548 {
 549     v9fs_req_recv(req, P9_RWRITE);
 550     if (count) {
 551         v9fs_uint32_read(req, count);
 552     }
 553     v9fs_req_free(req);
 554 }
 555
 556 /* size[4] Tflush tag[2] oldtag[2] */
 557 static P9Req *v9fs_tflush(QVirtio9P *v9p, uint16_t oldtag, uint16_t tag)
 558 {
 559     P9Req *req;
 560
 561     req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 562     v9fs_uint32_write(req, oldtag);
 563     v9fs_req_send(req);
 564     return req;
 565 }
 566
 567 /* size[4] Rflush tag[2] */
 568 static void v9fs_rflush(P9Req *req)
 569 {
 570     v9fs_req_recv(req, P9_RFLUSH);
 571     v9fs_req_free(req);
 572 }
 573
 574 static void do_version(QVirtio9P *v9p)
 575 {
 576     const char *version = "9P2000.L";
 577     uint16_t server_len;
 578     char *server_version;
 579     P9Req *req;
 580
 581     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 582     v9fs_req_wait_for_reply(req, NULL);
 583     v9fs_rversion(req, &server_len, &server_version);
 584
 585     g_assert_cmpmem(server_version, server_len, version, strlen(version));
 586
 587     g_free(server_version);
 588 }
 589
 590 /* utility function: walk to requested dir and return fid for that dir */
 591 static uint32_t do_walk(QVirtio9P *v9p, const char *path)
 592 {
 593     char **wnames;
 594     P9Req *req;
 595     const uint32_t fid = genfid();
 596
 597     int nwnames = split(path, "/", &wnames);
 598
 599     req = v9fs_twalk(v9p, 0, fid, nwnames, wnames, 0);
 600     v9fs_req_wait_for_reply(req, NULL);
 601     v9fs_rwalk(req, NULL, NULL);
 602
 603     split_free(&wnames);
 604     return fid;
 605 }
 606
 607 static void fs_version(void *obj, void *data, QGuestAllocator *t_alloc)
 608 {
 609     alloc = t_alloc;
 610     do_version(obj);
 611 }
 612
 613 static void do_attach(QVirtio9P *v9p)
 614 {
 615     P9Req *req;
 616
 617     do_version(v9p);
 618     req = v9fs_tattach(v9p, 0, getuid(), 0);
 619     v9fs_req_wait_for_reply(req, NULL);
 620     v9fs_rattach(req, NULL);
 621 }
 622
 623 static void fs_attach(void *obj, void *data, QGuestAllocator *t_alloc)
 624 {
 625     alloc = t_alloc;
 626     do_attach(obj);
 627 }
 628
 629 static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
 630 {
 631     QVirtio9P *v9p = obj;
 632     alloc = t_alloc;
 633     char *wnames[P9_MAXWELEM];
 634     uint16_t nwqid;
 635     v9fs_qid *wqid;
 636     int i;
 637     P9Req *req;
 638
 639     for (i = 0; i < P9_MAXWELEM; i++) {
 640         wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 641     }
 642
 643     do_attach(v9p);
 644     req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 645     v9fs_req_wait_for_reply(req, NULL);
 646     v9fs_rwalk(req, &nwqid, &wqid);
 647
 648     g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 649
 650     for (i = 0; i < P9_MAXWELEM; i++) {
 651         g_free(wnames[i]);
 652     }
 653
 654     g_free(wqid);
 655 }
 656
 657 static bool fs_dirents_contain_name(struct V9fsDirent *e, const char* name)
 658 {
 659     for (; e; e = e->next) {
 660         if (!strcmp(e->name, name)) {
 661             return true;
 662         }
 663     }
 664     return false;
 665 }
 666
 667 /* size[4] Tmkdir tag[2] dfid[4] name[s] mode[4] gid[4] */
 668 static P9Req *v9fs_tmkdir(QVirtio9P *v9p, uint32_t dfid, const char *name,
 669                           uint32_t mode, uint32_t gid, uint16_t tag)
 670 {
 671     P9Req *req;
 672
 673     uint32_t body_size = 4 + 4 + 4;
 674     uint16_t string_size = v9fs_string_size(name);
 675
 676     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 677     body_size += string_size;
 678
 679     req = v9fs_req_init(v9p, body_size, P9_TMKDIR, tag);
 680     v9fs_uint32_write(req, dfid);
 681     v9fs_string_write(req, name);
 682     v9fs_uint32_write(req, mode);
 683     v9fs_uint32_write(req, gid);
 684     v9fs_req_send(req);
 685     return req;
 686 }
 687
 688 /* size[4] Rmkdir tag[2] qid[13] */
 689 static void v9fs_rmkdir(P9Req *req, v9fs_qid *qid)
 690 {
 691     v9fs_req_recv(req, P9_RMKDIR);
 692     if (qid) {
 693         v9fs_memread(req, qid, 13);
 694     } else {
 695         v9fs_memskip(req, 13);
 696     }
 697     v9fs_req_free(req);
 698 }
 699
 700 /* size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4] */
 701 static P9Req *v9fs_tlcreate(QVirtio9P *v9p, uint32_t fid, const char *name,
 702                             uint32_t flags, uint32_t mode, uint32_t gid,
 703                             uint16_t tag)
 704 {
 705     P9Req *req;
 706
 707     uint32_t body_size = 4 + 4 + 4 + 4;
 708     uint16_t string_size = v9fs_string_size(name);
 709
 710     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 711     body_size += string_size;
 712
 713     req = v9fs_req_init(v9p, body_size, P9_TLCREATE, tag);
 714     v9fs_uint32_write(req, fid);
 715     v9fs_string_write(req, name);
 716     v9fs_uint32_write(req, flags);
 717     v9fs_uint32_write(req, mode);
 718     v9fs_uint32_write(req, gid);
 719     v9fs_req_send(req);
 720     return req;
 721 }
 722
 723 /* size[4] Rlcreate tag[2] qid[13] iounit[4] */
 724 static void v9fs_rlcreate(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 725 {
 726     v9fs_req_recv(req, P9_RLCREATE);
 727     if (qid) {
 728         v9fs_memread(req, qid, 13);
 729     } else {
 730         v9fs_memskip(req, 13);
 731     }
 732     if (iounit) {
 733         v9fs_uint32_read(req, iounit);
 734     }
 735     v9fs_req_free(req);
 736 }
 737
 738 /* size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4] */
 739 static P9Req *v9fs_tsymlink(QVirtio9P *v9p, uint32_t fid, const char *name,
 740                             const char *symtgt, uint32_t gid, uint16_t tag)
 741 {
 742     P9Req *req;
 743
 744     uint32_t body_size = 4 + 4;
 745     uint16_t string_size = v9fs_string_size(name) + v9fs_string_size(symtgt);
 746
 747     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 748     body_size += string_size;
 749
 750     req = v9fs_req_init(v9p, body_size, P9_TSYMLINK, tag);
 751     v9fs_uint32_write(req, fid);
 752     v9fs_string_write(req, name);
 753     v9fs_string_write(req, symtgt);
 754     v9fs_uint32_write(req, gid);
 755     v9fs_req_send(req);
 756     return req;
 757 }
 758
 759 /* size[4] Rsymlink tag[2] qid[13] */
 760 static void v9fs_rsymlink(P9Req *req, v9fs_qid *qid)
 761 {
 762     v9fs_req_recv(req, P9_RSYMLINK);
 763     if (qid) {
 764         v9fs_memread(req, qid, 13);
 765     } else {
 766         v9fs_memskip(req, 13);
 767     }
 768     v9fs_req_free(req);
 769 }
 770
 771 /* size[4] Tlink tag[2] dfid[4] fid[4] name[s] */
 772 static P9Req *v9fs_tlink(QVirtio9P *v9p, uint32_t dfid, uint32_t fid,
 773                          const char *name, uint16_t tag)
 774 {
 775     P9Req *req;
 776
 777     uint32_t body_size = 4 + 4;
 778     uint16_t string_size = v9fs_string_size(name);
 779
 780     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 781     body_size += string_size;
 782
 783     req = v9fs_req_init(v9p, body_size, P9_TLINK, tag);
 784     v9fs_uint32_write(req, dfid);
 785     v9fs_uint32_write(req, fid);
 786     v9fs_string_write(req, name);
 787     v9fs_req_send(req);
 788     return req;
 789 }
 790
 791 /* size[4] Rlink tag[2] */
 792 static void v9fs_rlink(P9Req *req)
 793 {
 794     v9fs_req_recv(req, P9_RLINK);
 795     v9fs_req_free(req);
 796 }
 797
 798 /* size[4] Tunlinkat tag[2] dirfd[4] name[s] flags[4] */
 799 static P9Req *v9fs_tunlinkat(QVirtio9P *v9p, uint32_t dirfd, const char *name,
 800                              uint32_t flags, uint16_t tag)
 801 {
 802     P9Req *req;
 803
 804     uint32_t body_size = 4 + 4;
 805     uint16_t string_size = v9fs_string_size(name);
 806
 807     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 808     body_size += string_size;
 809
 810     req = v9fs_req_init(v9p, body_size, P9_TUNLINKAT, tag);
 811     v9fs_uint32_write(req, dirfd);
 812     v9fs_string_write(req, name);
 813     v9fs_uint32_write(req, flags);
 814     v9fs_req_send(req);
 815     return req;
 816 }
 817
 818 /* size[4] Runlinkat tag[2] */
 819 static void v9fs_runlinkat(P9Req *req)
 820 {
 821     v9fs_req_recv(req, P9_RUNLINKAT);
 822     v9fs_req_free(req);
 823 }
 824
 825 /* basic readdir test where reply fits into a single response message */
 826 static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
 827 {
 828     QVirtio9P *v9p = obj;
 829     alloc = t_alloc;
 830     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 831     uint16_t nqid;
 832     v9fs_qid qid;
 833     uint32_t count, nentries;
 834     struct V9fsDirent *entries = NULL;
 835     P9Req *req;
 836
 837     do_attach(v9p);
 838     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 839     v9fs_req_wait_for_reply(req, NULL);
 840     v9fs_rwalk(req, &nqid, NULL);
 841     g_assert_cmpint(nqid, ==, 1);
 842
 843     req = v9fs_tlopen(v9p, 1, O_DIRECTORY, 0);
 844     v9fs_req_wait_for_reply(req, NULL);
 845     v9fs_rlopen(req, &qid, NULL);
 846
 847     /*
 848      * submit count = msize - 11, because 11 is the header size of Rreaddir
 849      */
 850     req = v9fs_treaddir(v9p, 1, 0, P9_MAX_SIZE - 11, 0);
 851     v9fs_req_wait_for_reply(req, NULL);
 852     v9fs_rreaddir(req, &count, &nentries, &entries);
 853
 854     /*
 855      * Assuming msize (P9_MAX_SIZE) is large enough so we can retrieve all
 856      * dir entries with only one readdir request.
 857      */
 858     g_assert_cmpint(
 859         nentries, ==,
 860         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 861     );
 862
 863     /*
 864      * Check all file names exist in returned entries, ignore their order
 865      * though.
 866      */
 867     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 868     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 869     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 870         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 871         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 872         g_free(name);
 873     }
 874
 875     v9fs_free_dirents(entries);
 876     g_free(wnames[0]);
 877 }
 878
 879 /* readdir test where overall request is split over several messages */
 880 static void do_readdir_split(QVirtio9P *v9p, uint32_t count)
 881 {
 882     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 883     uint16_t nqid;
 884     v9fs_qid qid;
 885     uint32_t nentries, npartialentries;
 886     struct V9fsDirent *entries, *tail, *partialentries;
 887     P9Req *req;
 888     int fid;
 889     uint64_t offset;
 890
 891     do_attach(v9p);
 892
 893     fid = 1;
 894     offset = 0;
 895     entries = NULL;
 896     nentries = 0;
 897     tail = NULL;
 898
 899     req = v9fs_twalk(v9p, 0, fid, 1, wnames, 0);
 900     v9fs_req_wait_for_reply(req, NULL);
 901     v9fs_rwalk(req, &nqid, NULL);
 902     g_assert_cmpint(nqid, ==, 1);
 903
 904     req = v9fs_tlopen(v9p, fid, O_DIRECTORY, 0);
 905     v9fs_req_wait_for_reply(req, NULL);
 906     v9fs_rlopen(req, &qid, NULL);
 907
 908     /*
 909      * send as many Treaddir requests as required to get all directory
 910      * entries
 911      */
 912     while (true) {
 913         npartialentries = 0;
 914         partialentries = NULL;
 915
 916         req = v9fs_treaddir(v9p, fid, offset, count, 0);
 917         v9fs_req_wait_for_reply(req, NULL);
 918         v9fs_rreaddir(req, &count, &npartialentries, &partialentries);
 919         if (npartialentries > 0 && partialentries) {
 920             if (!entries) {
 921                 entries = partialentries;
 922                 nentries = npartialentries;
 923                 tail = partialentries;
 924             } else {
 925                 tail->next = partialentries;
 926                 nentries += npartialentries;
 927             }
 928             while (tail->next) {
 929                 tail = tail->next;
 930             }
 931             offset = tail->offset;
 932         } else {
 933             break;
 934         }
 935     }
 936
 937     g_assert_cmpint(
 938         nentries, ==,
 939         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 940     );
 941
 942     /*
 943      * Check all file names exist in returned entries, ignore their order
 944      * though.
 945      */
 946     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 947     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 948     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 949         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 950         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 951         g_free(name);
 952     }
 953
 954     v9fs_free_dirents(entries);
 955
 956     g_free(wnames[0]);
 957 }
 958
 959 static void fs_walk_no_slash(void *obj, void *data, QGuestAllocator *t_alloc)
 960 {
 961     QVirtio9P *v9p = obj;
 962     alloc = t_alloc;
 963     char *const wnames[] = { g_strdup(" /") };
 964     P9Req *req;
 965     uint32_t err;
 966
 967     do_attach(v9p);
 968     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 969     v9fs_req_wait_for_reply(req, NULL);
 970     v9fs_rlerror(req, &err);
 971
 972     g_assert_cmpint(err, ==, ENOENT);
 973
 974     g_free(wnames[0]);
 975 }
 976
 977 static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
 978 {
 979     QVirtio9P *v9p = obj;
 980     alloc = t_alloc;
 981     char *const wnames[] = { g_strdup("..") };
 982     v9fs_qid root_qid, *wqid;
 983     P9Req *req;
 984
 985     do_version(v9p);
 986     req = v9fs_tattach(v9p, 0, getuid(), 0);
 987     v9fs_req_wait_for_reply(req, NULL);
 988     v9fs_rattach(req, &root_qid);
 989
 990     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 991     v9fs_req_wait_for_reply(req, NULL);
 992     v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 993
 994     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 995
 996     g_free(wqid);
 997     g_free(wnames[0]);
 998 }
 999
1000 static void fs_lopen(void *obj, void *data, QGuestAllocator *t_alloc)
1001 {
1002     QVirtio9P *v9p = obj;
1003     alloc = t_alloc;
1004     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
1005     P9Req *req;
1006
1007     do_attach(v9p);
1008     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1009     v9fs_req_wait_for_reply(req, NULL);
1010     v9fs_rwalk(req, NULL, NULL);
1011
1012     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1013     v9fs_req_wait_for_reply(req, NULL);
1014     v9fs_rlopen(req, NULL, NULL);
1015
1016     g_free(wnames[0]);
1017 }
1018
1019 static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
1020 {
1021     QVirtio9P *v9p = obj;
1022     alloc = t_alloc;
1023     static const uint32_t write_count = P9_MAX_SIZE / 2;
1024     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
1025     char *buf = g_malloc0(write_count);
1026     uint32_t count;
1027     P9Req *req;
1028
1029     do_attach(v9p);
1030     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1031     v9fs_req_wait_for_reply(req, NULL);
1032     v9fs_rwalk(req, NULL, NULL);
1033
1034     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1035     v9fs_req_wait_for_reply(req, NULL);
1036     v9fs_rlopen(req, NULL, NULL);
1037
1038     req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
1039     v9fs_req_wait_for_reply(req, NULL);
1040     v9fs_rwrite(req, &count);
1041     g_assert_cmpint(count, ==, write_count);
1042
1043     g_free(buf);
1044     g_free(wnames[0]);
1045 }
1046
1047 static void fs_flush_success(void *obj, void *data, QGuestAllocator *t_alloc)
1048 {
1049     QVirtio9P *v9p = obj;
1050     alloc = t_alloc;
1051     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
1052     P9Req *req, *flush_req;
1053     uint32_t reply_len;
1054     uint8_t should_block;
1055
1056     do_attach(v9p);
1057     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1058     v9fs_req_wait_for_reply(req, NULL);
1059     v9fs_rwalk(req, NULL, NULL);
1060
1061     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1062     v9fs_req_wait_for_reply(req, NULL);
1063     v9fs_rlopen(req, NULL, NULL);
1064
1065     /* This will cause the 9p server to try to write data to the backend,
1066      * until the write request gets cancelled.
1067      */
1068     should_block = 1;
1069     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
1070
1071     flush_req = v9fs_tflush(v9p, req->tag, 1);
1072
1073     /* The write request is supposed to be flushed: the server should just
1074      * mark the write request as used and reply to the flush request.
1075      */
1076     v9fs_req_wait_for_reply(req, &reply_len);
1077     g_assert_cmpint(reply_len, ==, 0);
1078     v9fs_req_free(req);
1079     v9fs_rflush(flush_req);
1080
1081     g_free(wnames[0]);
1082 }
1083
1084 static void fs_flush_ignored(void *obj, void *data, QGuestAllocator *t_alloc)
1085 {
1086     QVirtio9P *v9p = obj;
1087     alloc = t_alloc;
1088     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
1089     P9Req *req, *flush_req;
1090     uint32_t count;
1091     uint8_t should_block;
1092
1093     do_attach(v9p);
1094     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1095     v9fs_req_wait_for_reply(req, NULL);
1096     v9fs_rwalk(req, NULL, NULL);
1097
1098     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1099     v9fs_req_wait_for_reply(req, NULL);
1100     v9fs_rlopen(req, NULL, NULL);
1101
1102     /* This will cause the write request to complete right away, before it
1103      * could be actually cancelled.
1104      */
1105     should_block = 0;
1106     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
1107
1108     flush_req = v9fs_tflush(v9p, req->tag, 1);
1109
1110     /* The write request is supposed to complete. The server should
1111      * reply to the write request and the flush request.
1112      */
1113     v9fs_req_wait_for_reply(req, NULL);
1114     v9fs_rwrite(req, &count);
1115     g_assert_cmpint(count, ==, sizeof(should_block));
1116     v9fs_rflush(flush_req);
1117
1118     g_free(wnames[0]);
1119 }
1120
1121 static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
1122 {
1123     char *const name = g_strdup(cname);
1124     uint32_t fid;
1125     P9Req *req;
1126
1127     fid = do_walk(v9p, path);
1128
1129     req = v9fs_tmkdir(v9p, fid, name, 0750, 0, 0);
1130     v9fs_req_wait_for_reply(req, NULL);
1131     v9fs_rmkdir(req, NULL);
1132
1133     g_free(name);
1134 }
1135
1136 /* create a regular file with Tlcreate and return file's fid */
1137 static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
1138                            const char *cname)
1139 {
1140     char *const name = g_strdup(cname);
1141     uint32_t fid;
1142     P9Req *req;
1143
1144     fid = do_walk(v9p, path);
1145
1146     req = v9fs_tlcreate(v9p, fid, name, 0, 0750, 0, 0);
1147     v9fs_req_wait_for_reply(req, NULL);
1148     v9fs_rlcreate(req, NULL, NULL);
1149
1150     g_free(name);
1151     return fid;
1152 }
1153
1154 /* create symlink named @a clink in directory @a path pointing to @a to */
1155 static void do_symlink(QVirtio9P *v9p, const char *path, const char *clink,
1156                        const char *to)
1157 {
1158     char *const name = g_strdup(clink);
1159     char *const dst = g_strdup(to);
1160     uint32_t fid;
1161     P9Req *req;
1162
1163     fid = do_walk(v9p, path);
1164
1165     req = v9fs_tsymlink(v9p, fid, name, dst, 0, 0);
1166     v9fs_req_wait_for_reply(req, NULL);
1167     v9fs_rsymlink(req, NULL);
1168
1169     g_free(dst);
1170     g_free(name);
1171 }
1172
1173 /* create a hard link named @a clink in directory @a path pointing to @a to */
1174 static void do_hardlink(QVirtio9P *v9p, const char *path, const char *clink,
1175                         const char *to)
1176 {
1177     uint32_t dfid, fid;
1178     P9Req *req;
1179
1180     dfid = do_walk(v9p, path);
1181     fid = do_walk(v9p, to);
1182
1183     req = v9fs_tlink(v9p, dfid, fid, clink, 0);
1184     v9fs_req_wait_for_reply(req, NULL);
1185     v9fs_rlink(req);
1186 }
1187
1188 static void do_unlinkat(QVirtio9P *v9p, const char *atpath, const char *rpath,
1189                         uint32_t flags)
1190 {
1191     char *const name = g_strdup(rpath);
1192     uint32_t fid;
1193     P9Req *req;
1194
1195     fid = do_walk(v9p, atpath);
1196
1197     req = v9fs_tunlinkat(v9p, fid, name, flags, 0);
1198     v9fs_req_wait_for_reply(req, NULL);
1199     v9fs_runlinkat(req);
1200
1201     g_free(name);
1202 }
1203
1204 static void fs_readdir_split_128(void *obj, void *data,
1205                                  QGuestAllocator *t_alloc)
1206 {
1207     alloc = t_alloc;
1208     do_readdir_split(obj, 128);
1209 }
1210
1211 static void fs_readdir_split_256(void *obj, void *data,
1212                                  QGuestAllocator *t_alloc)
1213 {
1214     alloc = t_alloc;
1215     do_readdir_split(obj, 256);
1216 }
1217
1218 static void fs_readdir_split_512(void *obj, void *data,
1219                                  QGuestAllocator *t_alloc)
1220 {
1221     alloc = t_alloc;
1222     do_readdir_split(obj, 512);
1223 }
1224
1225
1226 /* tests using the 9pfs 'local' fs driver */
1227
1228 static void fs_create_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1229 {
1230     QVirtio9P *v9p = obj;
1231     alloc = t_alloc;
1232     struct stat st;
1233     char *root_path = virtio_9p_test_path("");
1234     char *new_dir = virtio_9p_test_path("01");
1235
1236     g_assert(root_path != NULL);
1237
1238     do_attach(v9p);
1239     do_mkdir(v9p, "/", "01");
1240
1241     /* check if created directory really exists now ... */
1242     g_assert(stat(new_dir, &st) == 0);
1243     /* ... and is actually a directory */
1244     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1245
1246     g_free(new_dir);
1247     g_free(root_path);
1248 }
1249
1250 static void fs_unlinkat_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1251 {
1252     QVirtio9P *v9p = obj;
1253     alloc = t_alloc;
1254     struct stat st;
1255     char *root_path = virtio_9p_test_path("");
1256     char *new_dir = virtio_9p_test_path("02");
1257
1258     g_assert(root_path != NULL);
1259
1260     do_attach(v9p);
1261     do_mkdir(v9p, "/", "02");
1262
1263     /* check if created directory really exists now ... */
1264     g_assert(stat(new_dir, &st) == 0);
1265     /* ... and is actually a directory */
1266     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1267
1268     do_unlinkat(v9p, "/", "02", AT_REMOVEDIR);
1269     /* directory should be gone now */
1270     g_assert(stat(new_dir, &st) != 0);
1271
1272     g_free(new_dir);
1273     g_free(root_path);
1274 }
1275
1276 static void fs_create_file(void *obj, void *data, QGuestAllocator *t_alloc)
1277 {
1278     QVirtio9P *v9p = obj;
1279     alloc = t_alloc;
1280     struct stat st;
1281     char *new_file = virtio_9p_test_path("03/1st_file");
1282
1283     do_attach(v9p);
1284     do_mkdir(v9p, "/", "03");
1285     do_lcreate(v9p, "03", "1st_file");
1286
1287     /* check if created file exists now ... */
1288     g_assert(stat(new_file, &st) == 0);
1289     /* ... and is a regular file */
1290     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1291
1292     g_free(new_file);
1293 }
1294
1295 static void fs_unlinkat_file(void *obj, void *data, QGuestAllocator *t_alloc)
1296 {
1297     QVirtio9P *v9p = obj;
1298     alloc = t_alloc;
1299     struct stat st;
1300     char *new_file = virtio_9p_test_path("04/doa_file");
1301
1302     do_attach(v9p);
1303     do_mkdir(v9p, "/", "04");
1304     do_lcreate(v9p, "04", "doa_file");
1305
1306     /* check if created file exists now ... */
1307     g_assert(stat(new_file, &st) == 0);
1308     /* ... and is a regular file */
1309     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1310
1311     do_unlinkat(v9p, "04", "doa_file", 0);
1312     /* file should be gone now */
1313     g_assert(stat(new_file, &st) != 0);
1314
1315     g_free(new_file);
1316 }
1317
1318 static void fs_symlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
1319 {
1320     QVirtio9P *v9p = obj;
1321     alloc = t_alloc;
1322     struct stat st;
1323     char *real_file = virtio_9p_test_path("05/real_file");
1324     char *symlink_file = virtio_9p_test_path("05/symlink_file");
1325
1326     do_attach(v9p);
1327     do_mkdir(v9p, "/", "05");
1328     do_lcreate(v9p, "05", "real_file");
1329     g_assert(stat(real_file, &st) == 0);
1330     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1331
1332     do_symlink(v9p, "05", "symlink_file", "real_file");
1333
1334     /* check if created link exists now */
1335     g_assert(stat(symlink_file, &st) == 0);
1336
1337     g_free(symlink_file);
1338     g_free(real_file);
1339 }
1340
1341 static void fs_unlinkat_symlink(void *obj, void *data,
1342                                 QGuestAllocator *t_alloc)
1343 {
1344     QVirtio9P *v9p = obj;
1345     alloc = t_alloc;
1346     struct stat st;
1347     char *real_file = virtio_9p_test_path("06/real_file");
1348     char *symlink_file = virtio_9p_test_path("06/symlink_file");
1349
1350     do_attach(v9p);
1351     do_mkdir(v9p, "/", "06");
1352     do_lcreate(v9p, "06", "real_file");
1353     g_assert(stat(real_file, &st) == 0);
1354     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1355
1356     do_symlink(v9p, "06", "symlink_file", "real_file");
1357     g_assert(stat(symlink_file, &st) == 0);
1358
1359     do_unlinkat(v9p, "06", "symlink_file", 0);
1360     /* symlink should be gone now */
1361     g_assert(stat(symlink_file, &st) != 0);
1362
1363     g_free(symlink_file);
1364     g_free(real_file);
1365 }
1366
1367 static void fs_hardlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
1368 {
1369     QVirtio9P *v9p = obj;
1370     alloc = t_alloc;
1371     struct stat st_real, st_link;
1372     char *real_file = virtio_9p_test_path("07/real_file");
1373     char *hardlink_file = virtio_9p_test_path("07/hardlink_file");
1374
1375     do_attach(v9p);
1376     do_mkdir(v9p, "/", "07");
1377     do_lcreate(v9p, "07", "real_file");
1378     g_assert(stat(real_file, &st_real) == 0);
1379     g_assert((st_real.st_mode & S_IFMT) == S_IFREG);
1380
1381     do_hardlink(v9p, "07", "hardlink_file", "07/real_file");
1382
1383     /* check if link exists now ... */
1384     g_assert(stat(hardlink_file, &st_link) == 0);
1385     /* ... and it's a hard link, right? */
1386     g_assert((st_link.st_mode & S_IFMT) == S_IFREG);
1387     g_assert(st_link.st_dev == st_real.st_dev);
1388     g_assert(st_link.st_ino == st_real.st_ino);
1389
1390     g_free(hardlink_file);
1391     g_free(real_file);
1392 }
1393
1394 static void fs_unlinkat_hardlink(void *obj, void *data,
1395                                  QGuestAllocator *t_alloc)
1396 {
1397     QVirtio9P *v9p = obj;
1398     alloc = t_alloc;
1399     struct stat st_real, st_link;
1400     char *real_file = virtio_9p_test_path("08/real_file");
1401     char *hardlink_file = virtio_9p_test_path("08/hardlink_file");
1402
1403     do_attach(v9p);
1404     do_mkdir(v9p, "/", "08");
1405     do_lcreate(v9p, "08", "real_file");
1406     g_assert(stat(real_file, &st_real) == 0);
1407     g_assert((st_real.st_mode & S_IFMT) == S_IFREG);
1408
1409     do_hardlink(v9p, "08", "hardlink_file", "08/real_file");
1410     g_assert(stat(hardlink_file, &st_link) == 0);
1411
1412     do_unlinkat(v9p, "08", "hardlink_file", 0);
1413     /* symlink should be gone now */
1414     g_assert(stat(hardlink_file, &st_link) != 0);
1415     /* and old file should still exist */
1416     g_assert(stat(real_file, &st_real) == 0);
1417
1418     g_free(hardlink_file);
1419     g_free(real_file);
1420 }
1421
1422 static void *assign_9p_local_driver(GString *cmd_line, void *arg)
1423 {
1424     virtio_9p_assign_local_driver(cmd_line, "security_model=mapped-xattr");
1425     return arg;
1426 }
1427
1428 static void register_virtio_9p_test(void)
1429 {
1430
1431     QOSGraphTestOptions opts = {
1432     };
1433
1434     /* 9pfs test cases using the 'synth' filesystem driver */
1435     qos_add_test("synth/config", "virtio-9p", pci_config, &opts);
1436     qos_add_test("synth/version/basic", "virtio-9p", fs_version,  &opts);
1437     qos_add_test("synth/attach/basic", "virtio-9p", fs_attach,  &opts);
1438     qos_add_test("synth/walk/basic", "virtio-9p", fs_walk,  &opts);
1439     qos_add_test("synth/walk/no_slash", "virtio-9p", fs_walk_no_slash,
1440                   &opts);
1441     qos_add_test("synth/walk/dotdot_from_root", "virtio-9p",
1442                  fs_walk_dotdot,  &opts);
1443     qos_add_test("synth/lopen/basic", "virtio-9p", fs_lopen,  &opts);
1444     qos_add_test("synth/write/basic", "virtio-9p", fs_write,  &opts);
1445     qos_add_test("synth/flush/success", "virtio-9p", fs_flush_success,
1446                   &opts);
1447     qos_add_test("synth/flush/ignored", "virtio-9p", fs_flush_ignored,
1448                   &opts);
1449     qos_add_test("synth/readdir/basic", "virtio-9p", fs_readdir,  &opts);
1450     qos_add_test("synth/readdir/split_512", "virtio-9p",
1451                  fs_readdir_split_512,  &opts);
1452     qos_add_test("synth/readdir/split_256", "virtio-9p",
1453                  fs_readdir_split_256,  &opts);
1454     qos_add_test("synth/readdir/split_128", "virtio-9p",
1455                  fs_readdir_split_128,  &opts);
1456
1457
1458     /* 9pfs test cases using the 'local' filesystem driver */
1459
1460     /*
1461      * XXX: Until we are sure that these tests can run everywhere,
1462      * keep them as "slow" so that they aren't run with "make check".
1463      */
1464     if (!g_test_slow()) {
1465         return;
1466     }
1467
1468     opts.before = assign_9p_local_driver;
1469     qos_add_test("local/config", "virtio-9p", pci_config,  &opts);
1470     qos_add_test("local/create_dir", "virtio-9p", fs_create_dir, &opts);
1471     qos_add_test("local/unlinkat_dir", "virtio-9p", fs_unlinkat_dir, &opts);
1472     qos_add_test("local/create_file", "virtio-9p", fs_create_file, &opts);
1473     qos_add_test("local/unlinkat_file", "virtio-9p", fs_unlinkat_file, &opts);
1474     qos_add_test("local/symlink_file", "virtio-9p", fs_symlink_file, &opts);
1475     qos_add_test("local/unlinkat_symlink", "virtio-9p", fs_unlinkat_symlink,
1476                  &opts);
1477     qos_add_test("local/hardlink_file", "virtio-9p", fs_hardlink_file, &opts);
1478     qos_add_test("local/unlinkat_hardlink", "virtio-9p", fs_unlinkat_hardlink,
1479                  &opts);
1480 }
1481
1482 libqos_init(register_virtio_9p_test);
1483
1484 static void __attribute__((constructor)) construct_9p_test(void)
1485 {
1486     /* make sure test dir for the 'local' tests exists */
1487     virtio_9p_create_local_test_dir();
1488 }
1489
1490 static void __attribute__((destructor)) destruct_9p_test(void)
1491 {
1492     /* remove previously created test dir when test suite completed */
1493     virtio_9p_remove_local_test_dir();
1494 }