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 /*
  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 "libqtest-single.h"
  17 #include "qemu/module.h"
  18 #include "hw/9pfs/9p.h"
  19 #include "hw/9pfs/9p-synth.h"
  20 #include "libqos/virtio-9p.h"
  21 #include "libqos/qgraph.h"
  22
  23 #define QVIRTIO_9P_TIMEOUT_US (10 * 1000 * 1000)
  24 static QGuestAllocator *alloc;
  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     for (i = 0; (*out)[i]; ++i) {
  76         g_free((*out)[i]);
  77     }
  78     g_free(*out);
  79     *out = NULL;
  80 }
  81
  82 static void pci_config(void *obj, void *data, QGuestAllocator *t_alloc)
  83 {
  84     QVirtio9P *v9p = obj;
  85     alloc = t_alloc;
  86     size_t tag_len = qvirtio_config_readw(v9p->vdev, 0);
  87     char *tag;
  88     int i;
  89
  90     g_assert_cmpint(tag_len, ==, strlen(MOUNT_TAG));
  91
  92     tag = g_malloc(tag_len);
  93     for (i = 0; i < tag_len; i++) {
  94         tag[i] = qvirtio_config_readb(v9p->vdev, i + 2);
  95     }
  96     g_assert_cmpmem(tag, tag_len, MOUNT_TAG, tag_len);
  97     g_free(tag);
  98 }
  99
 100 #define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */
 101
 102 typedef struct {
 103     QTestState *qts;
 104     QVirtio9P *v9p;
 105     uint16_t tag;
 106     uint64_t t_msg;
 107     uint32_t t_size;
 108     uint64_t r_msg;
 109     /* No r_size, it is hardcoded to P9_MAX_SIZE */
 110     size_t t_off;
 111     size_t r_off;
 112     uint32_t free_head;
 113 } P9Req;
 114
 115 static void v9fs_memwrite(P9Req *req, const void *addr, size_t len)
 116 {
 117     qtest_memwrite(req->qts, req->t_msg + req->t_off, addr, len);
 118     req->t_off += len;
 119 }
 120
 121 static void v9fs_memskip(P9Req *req, size_t len)
 122 {
 123     req->r_off += len;
 124 }
 125
 126 static void v9fs_memread(P9Req *req, void *addr, size_t len)
 127 {
 128     qtest_memread(req->qts, req->r_msg + req->r_off, addr, len);
 129     req->r_off += len;
 130 }
 131
 132 static void v9fs_uint8_read(P9Req *req, uint8_t *val)
 133 {
 134     v9fs_memread(req, val, 1);
 135 }
 136
 137 static void v9fs_uint16_write(P9Req *req, uint16_t val)
 138 {
 139     uint16_t le_val = cpu_to_le16(val);
 140
 141     v9fs_memwrite(req, &le_val, 2);
 142 }
 143
 144 static void v9fs_uint16_read(P9Req *req, uint16_t *val)
 145 {
 146     v9fs_memread(req, val, 2);
 147     le16_to_cpus(val);
 148 }
 149
 150 static void v9fs_uint32_write(P9Req *req, uint32_t val)
 151 {
 152     uint32_t le_val = cpu_to_le32(val);
 153
 154     v9fs_memwrite(req, &le_val, 4);
 155 }
 156
 157 static void v9fs_uint64_write(P9Req *req, uint64_t val)
 158 {
 159     uint64_t le_val = cpu_to_le64(val);
 160
 161     v9fs_memwrite(req, &le_val, 8);
 162 }
 163
 164 static void v9fs_uint32_read(P9Req *req, uint32_t *val)
 165 {
 166     v9fs_memread(req, val, 4);
 167     le32_to_cpus(val);
 168 }
 169
 170 static void v9fs_uint64_read(P9Req *req, uint64_t *val)
 171 {
 172     v9fs_memread(req, val, 8);
 173     le64_to_cpus(val);
 174 }
 175
 176 /* len[2] string[len] */
 177 static uint16_t v9fs_string_size(const char *string)
 178 {
 179     size_t len = strlen(string);
 180
 181     g_assert_cmpint(len, <=, UINT16_MAX - 2);
 182
 183     return 2 + len;
 184 }
 185
 186 static void v9fs_string_write(P9Req *req, const char *string)
 187 {
 188     int len = strlen(string);
 189
 190     g_assert_cmpint(len, <=, UINT16_MAX);
 191
 192     v9fs_uint16_write(req, (uint16_t) len);
 193     v9fs_memwrite(req, string, len);
 194 }
 195
 196 static void v9fs_string_read(P9Req *req, uint16_t *len, char **string)
 197 {
 198     uint16_t local_len;
 199
 200     v9fs_uint16_read(req, &local_len);
 201     if (len) {
 202         *len = local_len;
 203     }
 204     if (string) {
 205         *string = g_malloc(local_len + 1);
 206         v9fs_memread(req, *string, local_len);
 207         (*string)[local_len] = 0;
 208     } else {
 209         v9fs_memskip(req, local_len);
 210     }
 211 }
 212
 213  typedef struct {
 214     uint32_t size;
 215     uint8_t id;
 216     uint16_t tag;
 217 } QEMU_PACKED P9Hdr;
 218
 219 static P9Req *v9fs_req_init(QVirtio9P *v9p, uint32_t size, uint8_t id,
 220                             uint16_t tag)
 221 {
 222     P9Req *req = g_new0(P9Req, 1);
 223     uint32_t total_size = 7; /* 9P header has well-known size of 7 bytes */
 224     P9Hdr hdr = {
 225         .id = id,
 226         .tag = cpu_to_le16(tag)
 227     };
 228
 229     g_assert_cmpint(total_size, <=, UINT32_MAX - size);
 230     total_size += size;
 231     hdr.size = cpu_to_le32(total_size);
 232
 233     g_assert_cmpint(total_size, <=, P9_MAX_SIZE);
 234
 235     req->qts = global_qtest;
 236     req->v9p = v9p;
 237     req->t_size = total_size;
 238     req->t_msg = guest_alloc(alloc, req->t_size);
 239     v9fs_memwrite(req, &hdr, 7);
 240     req->tag = tag;
 241     return req;
 242 }
 243
 244 static void v9fs_req_send(P9Req *req)
 245 {
 246     QVirtio9P *v9p = req->v9p;
 247
 248     req->r_msg = guest_alloc(alloc, P9_MAX_SIZE);
 249     req->free_head = qvirtqueue_add(req->qts, v9p->vq, req->t_msg, req->t_size,
 250                                     false, true);
 251     qvirtqueue_add(req->qts, v9p->vq, req->r_msg, P9_MAX_SIZE, true, false);
 252     qvirtqueue_kick(req->qts, v9p->vdev, v9p->vq, req->free_head);
 253     req->t_off = 0;
 254 }
 255
 256 static const char *rmessage_name(uint8_t id)
 257 {
 258     return
 259         id == P9_RLERROR ? "RLERROR" :
 260         id == P9_RVERSION ? "RVERSION" :
 261         id == P9_RATTACH ? "RATTACH" :
 262         id == P9_RWALK ? "RWALK" :
 263         id == P9_RLOPEN ? "RLOPEN" :
 264         id == P9_RWRITE ? "RWRITE" :
 265         id == P9_RMKDIR ? "RMKDIR" :
 266         id == P9_RLCREATE ? "RLCREATE" :
 267         id == P9_RSYMLINK ? "RSYMLINK" :
 268         id == P9_RLINK ? "RLINK" :
 269         id == P9_RUNLINKAT ? "RUNLINKAT" :
 270         id == P9_RFLUSH ? "RFLUSH" :
 271         id == P9_RREADDIR ? "READDIR" :
 272         "<unknown>";
 273 }
 274
 275 static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 276 {
 277     QVirtio9P *v9p = req->v9p;
 278
 279     qvirtio_wait_used_elem(req->qts, v9p->vdev, v9p->vq, req->free_head, len,
 280                            QVIRTIO_9P_TIMEOUT_US);
 281 }
 282
 283 static void v9fs_req_recv(P9Req *req, uint8_t id)
 284 {
 285     P9Hdr hdr;
 286
 287     v9fs_memread(req, &hdr, 7);
 288     hdr.size = ldl_le_p(&hdr.size);
 289     hdr.tag = lduw_le_p(&hdr.tag);
 290
 291     g_assert_cmpint(hdr.size, >=, 7);
 292     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 293     g_assert_cmpint(hdr.tag, ==, req->tag);
 294
 295     if (hdr.id != id) {
 296         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 297                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 298
 299         if (hdr.id == P9_RLERROR) {
 300             uint32_t err;
 301             v9fs_uint32_read(req, &err);
 302             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 303         }
 304     }
 305     g_assert_cmpint(hdr.id, ==, id);
 306 }
 307
 308 static void v9fs_req_free(P9Req *req)
 309 {
 310     guest_free(alloc, req->t_msg);
 311     guest_free(alloc, req->r_msg);
 312     g_free(req);
 313 }
 314
 315 /* size[4] Rlerror tag[2] ecode[4] */
 316 static void v9fs_rlerror(P9Req *req, uint32_t *err)
 317 {
 318     v9fs_req_recv(req, P9_RLERROR);
 319     v9fs_uint32_read(req, err);
 320     v9fs_req_free(req);
 321 }
 322
 323 /* size[4] Tversion tag[2] msize[4] version[s] */
 324 static P9Req *v9fs_tversion(QVirtio9P *v9p, uint32_t msize, const char *version,
 325                             uint16_t tag)
 326 {
 327     P9Req *req;
 328     uint32_t body_size = 4;
 329     uint16_t string_size = v9fs_string_size(version);
 330
 331     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 332     body_size += string_size;
 333     req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
 334
 335     v9fs_uint32_write(req, msize);
 336     v9fs_string_write(req, version);
 337     v9fs_req_send(req);
 338     return req;
 339 }
 340
 341 /* size[4] Rversion tag[2] msize[4] version[s] */
 342 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 343 {
 344     uint32_t msize;
 345
 346     v9fs_req_recv(req, P9_RVERSION);
 347     v9fs_uint32_read(req, &msize);
 348
 349     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 350
 351     if (len || version) {
 352         v9fs_string_read(req, len, version);
 353     }
 354
 355     v9fs_req_free(req);
 356 }
 357
 358 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 359 static P9Req *v9fs_tattach(QVirtio9P *v9p, uint32_t fid, uint32_t n_uname,
 360                            uint16_t tag)
 361 {
 362     const char *uname = ""; /* ignored by QEMU */
 363     const char *aname = ""; /* ignored by QEMU */
 364     P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 365
 366     v9fs_uint32_write(req, fid);
 367     v9fs_uint32_write(req, P9_NOFID);
 368     v9fs_string_write(req, uname);
 369     v9fs_string_write(req, aname);
 370     v9fs_uint32_write(req, n_uname);
 371     v9fs_req_send(req);
 372     return req;
 373 }
 374
 375 typedef char v9fs_qid[13];
 376
 377 /* size[4] Rattach tag[2] qid[13] */
 378 static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 379 {
 380     v9fs_req_recv(req, P9_RATTACH);
 381     if (qid) {
 382         v9fs_memread(req, qid, 13);
 383     }
 384     v9fs_req_free(req);
 385 }
 386
 387 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 388 static P9Req *v9fs_twalk(QVirtio9P *v9p, uint32_t fid, uint32_t newfid,
 389                          uint16_t nwname, char *const wnames[], uint16_t tag)
 390 {
 391     P9Req *req;
 392     int i;
 393     uint32_t body_size = 4 + 4 + 2;
 394
 395     for (i = 0; i < nwname; i++) {
 396         uint16_t wname_size = v9fs_string_size(wnames[i]);
 397
 398         g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 399         body_size += wname_size;
 400     }
 401     req = v9fs_req_init(v9p,  body_size, P9_TWALK, tag);
 402     v9fs_uint32_write(req, fid);
 403     v9fs_uint32_write(req, newfid);
 404     v9fs_uint16_write(req, nwname);
 405     for (i = 0; i < nwname; i++) {
 406         v9fs_string_write(req, wnames[i]);
 407     }
 408     v9fs_req_send(req);
 409     return req;
 410 }
 411
 412 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 413 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 414 {
 415     uint16_t local_nwqid;
 416
 417     v9fs_req_recv(req, P9_RWALK);
 418     v9fs_uint16_read(req, &local_nwqid);
 419     if (nwqid) {
 420         *nwqid = local_nwqid;
 421     }
 422     if (wqid) {
 423         *wqid = g_malloc(local_nwqid * 13);
 424         v9fs_memread(req, *wqid, local_nwqid * 13);
 425     }
 426     v9fs_req_free(req);
 427 }
 428
 429 /* size[4] Treaddir tag[2] fid[4] offset[8] count[4] */
 430 static P9Req *v9fs_treaddir(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 431                             uint32_t count, uint16_t tag)
 432 {
 433     P9Req *req;
 434
 435     req = v9fs_req_init(v9p, 4 + 8 + 4, P9_TREADDIR, tag);
 436     v9fs_uint32_write(req, fid);
 437     v9fs_uint64_write(req, offset);
 438     v9fs_uint32_write(req, count);
 439     v9fs_req_send(req);
 440     return req;
 441 }
 442
 443 struct V9fsDirent {
 444     v9fs_qid qid;
 445     uint64_t offset;
 446     uint8_t type;
 447     char *name;
 448     struct V9fsDirent *next;
 449 };
 450
 451 /* size[4] Rreaddir tag[2] count[4] data[count] */
 452 static void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries,
 453                           struct V9fsDirent **entries)
 454 {
 455     uint32_t local_count;
 456     struct V9fsDirent *e = NULL;
 457     uint16_t slen;
 458     uint32_t n = 0;
 459
 460     v9fs_req_recv(req, P9_RREADDIR);
 461     v9fs_uint32_read(req, &local_count);
 462
 463     if (count) {
 464         *count = local_count;
 465     }
 466
 467     for (int32_t togo = (int32_t)local_count;
 468          togo >= 13 + 8 + 1 + 2;
 469          togo -= 13 + 8 + 1 + 2 + slen, ++n)
 470     {
 471         if (!e) {
 472             e = g_malloc(sizeof(struct V9fsDirent));
 473             if (entries) {
 474                 *entries = e;
 475             }
 476         } else {
 477             e = e->next = g_malloc(sizeof(struct V9fsDirent));
 478         }
 479         e->next = NULL;
 480         /* qid[13] offset[8] type[1] name[s] */
 481         v9fs_memread(req, &e->qid, 13);
 482         v9fs_uint64_read(req, &e->offset);
 483         v9fs_uint8_read(req, &e->type);
 484         v9fs_string_read(req, &slen, &e->name);
 485     }
 486
 487     if (nentries) {
 488         *nentries = n;
 489     }
 490
 491     v9fs_req_free(req);
 492 }
 493
 494 static void v9fs_free_dirents(struct V9fsDirent *e)
 495 {
 496     struct V9fsDirent *next = NULL;
 497
 498     for (; e; e = next) {
 499         next = e->next;
 500         g_free(e->name);
 501         g_free(e);
 502     }
 503 }
 504
 505 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 506 static P9Req *v9fs_tlopen(QVirtio9P *v9p, uint32_t fid, uint32_t flags,
 507                           uint16_t tag)
 508 {
 509     P9Req *req;
 510
 511     req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 512     v9fs_uint32_write(req, fid);
 513     v9fs_uint32_write(req, flags);
 514     v9fs_req_send(req);
 515     return req;
 516 }
 517
 518 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 519 static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 520 {
 521     v9fs_req_recv(req, P9_RLOPEN);
 522     if (qid) {
 523         v9fs_memread(req, qid, 13);
 524     } else {
 525         v9fs_memskip(req, 13);
 526     }
 527     if (iounit) {
 528         v9fs_uint32_read(req, iounit);
 529     }
 530     v9fs_req_free(req);
 531 }
 532
 533 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 534 static P9Req *v9fs_twrite(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 535                           uint32_t count, const void *data, uint16_t tag)
 536 {
 537     P9Req *req;
 538     uint32_t body_size = 4 + 8 + 4;
 539
 540     g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 541     body_size += count;
 542     req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 543     v9fs_uint32_write(req, fid);
 544     v9fs_uint64_write(req, offset);
 545     v9fs_uint32_write(req, count);
 546     v9fs_memwrite(req, data, count);
 547     v9fs_req_send(req);
 548     return req;
 549 }
 550
 551 /* size[4] Rwrite tag[2] count[4] */
 552 static void v9fs_rwrite(P9Req *req, uint32_t *count)
 553 {
 554     v9fs_req_recv(req, P9_RWRITE);
 555     if (count) {
 556         v9fs_uint32_read(req, count);
 557     }
 558     v9fs_req_free(req);
 559 }
 560
 561 /* size[4] Tflush tag[2] oldtag[2] */
 562 static P9Req *v9fs_tflush(QVirtio9P *v9p, uint16_t oldtag, uint16_t tag)
 563 {
 564     P9Req *req;
 565
 566     req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 567     v9fs_uint32_write(req, oldtag);
 568     v9fs_req_send(req);
 569     return req;
 570 }
 571
 572 /* size[4] Rflush tag[2] */
 573 static void v9fs_rflush(P9Req *req)
 574 {
 575     v9fs_req_recv(req, P9_RFLUSH);
 576     v9fs_req_free(req);
 577 }
 578
 579 static void do_version(QVirtio9P *v9p)
 580 {
 581     const char *version = "9P2000.L";
 582     uint16_t server_len;
 583     char *server_version;
 584     P9Req *req;
 585
 586     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 587     v9fs_req_wait_for_reply(req, NULL);
 588     v9fs_rversion(req, &server_len, &server_version);
 589
 590     g_assert_cmpmem(server_version, server_len, version, strlen(version));
 591
 592     g_free(server_version);
 593 }
 594
 595 /* utility function: walk to requested dir and return fid for that dir */
 596 static uint32_t do_walk(QVirtio9P *v9p, const char *path)
 597 {
 598     char **wnames;
 599     P9Req *req;
 600     const uint32_t fid = genfid();
 601
 602     int nwnames = split(path, "/", &wnames);
 603
 604     req = v9fs_twalk(v9p, 0, fid, nwnames, wnames, 0);
 605     v9fs_req_wait_for_reply(req, NULL);
 606     v9fs_rwalk(req, NULL, NULL);
 607
 608     split_free(&wnames);
 609     return fid;
 610 }
 611
 612 static void fs_version(void *obj, void *data, QGuestAllocator *t_alloc)
 613 {
 614     alloc = t_alloc;
 615     do_version(obj);
 616 }
 617
 618 static void do_attach(QVirtio9P *v9p)
 619 {
 620     P9Req *req;
 621
 622     do_version(v9p);
 623     req = v9fs_tattach(v9p, 0, getuid(), 0);
 624     v9fs_req_wait_for_reply(req, NULL);
 625     v9fs_rattach(req, NULL);
 626 }
 627
 628 static void fs_attach(void *obj, void *data, QGuestAllocator *t_alloc)
 629 {
 630     alloc = t_alloc;
 631     do_attach(obj);
 632 }
 633
 634 static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
 635 {
 636     QVirtio9P *v9p = obj;
 637     alloc = t_alloc;
 638     char *wnames[P9_MAXWELEM];
 639     uint16_t nwqid;
 640     v9fs_qid *wqid;
 641     int i;
 642     P9Req *req;
 643
 644     for (i = 0; i < P9_MAXWELEM; i++) {
 645         wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 646     }
 647
 648     do_attach(v9p);
 649     req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 650     v9fs_req_wait_for_reply(req, NULL);
 651     v9fs_rwalk(req, &nwqid, &wqid);
 652
 653     g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 654
 655     for (i = 0; i < P9_MAXWELEM; i++) {
 656         g_free(wnames[i]);
 657     }
 658
 659     g_free(wqid);
 660 }
 661
 662 static bool fs_dirents_contain_name(struct V9fsDirent *e, const char* name)
 663 {
 664     for (; e; e = e->next) {
 665         if (!strcmp(e->name, name)) {
 666             return true;
 667         }
 668     }
 669     return false;
 670 }
 671
 672 /* size[4] Tmkdir tag[2] dfid[4] name[s] mode[4] gid[4] */
 673 static P9Req *v9fs_tmkdir(QVirtio9P *v9p, uint32_t dfid, const char *name,
 674                           uint32_t mode, uint32_t gid, uint16_t tag)
 675 {
 676     P9Req *req;
 677
 678     uint32_t body_size = 4 + 4 + 4;
 679     uint16_t string_size = v9fs_string_size(name);
 680
 681     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 682     body_size += string_size;
 683
 684     req = v9fs_req_init(v9p, body_size, P9_TMKDIR, tag);
 685     v9fs_uint32_write(req, dfid);
 686     v9fs_string_write(req, name);
 687     v9fs_uint32_write(req, mode);
 688     v9fs_uint32_write(req, gid);
 689     v9fs_req_send(req);
 690     return req;
 691 }
 692
 693 /* size[4] Rmkdir tag[2] qid[13] */
 694 static void v9fs_rmkdir(P9Req *req, v9fs_qid *qid)
 695 {
 696     v9fs_req_recv(req, P9_RMKDIR);
 697     if (qid) {
 698         v9fs_memread(req, qid, 13);
 699     } else {
 700         v9fs_memskip(req, 13);
 701     }
 702     v9fs_req_free(req);
 703 }
 704
 705 /* size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4] */
 706 static P9Req *v9fs_tlcreate(QVirtio9P *v9p, uint32_t fid, const char *name,
 707                             uint32_t flags, uint32_t mode, uint32_t gid,
 708                             uint16_t tag)
 709 {
 710     P9Req *req;
 711
 712     uint32_t body_size = 4 + 4 + 4 + 4;
 713     uint16_t string_size = v9fs_string_size(name);
 714
 715     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 716     body_size += string_size;
 717
 718     req = v9fs_req_init(v9p, body_size, P9_TLCREATE, tag);
 719     v9fs_uint32_write(req, fid);
 720     v9fs_string_write(req, name);
 721     v9fs_uint32_write(req, flags);
 722     v9fs_uint32_write(req, mode);
 723     v9fs_uint32_write(req, gid);
 724     v9fs_req_send(req);
 725     return req;
 726 }
 727
 728 /* size[4] Rlcreate tag[2] qid[13] iounit[4] */
 729 static void v9fs_rlcreate(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 730 {
 731     v9fs_req_recv(req, P9_RLCREATE);
 732     if (qid) {
 733         v9fs_memread(req, qid, 13);
 734     } else {
 735         v9fs_memskip(req, 13);
 736     }
 737     if (iounit) {
 738         v9fs_uint32_read(req, iounit);
 739     }
 740     v9fs_req_free(req);
 741 }
 742
 743 /* size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4] */
 744 static P9Req *v9fs_tsymlink(QVirtio9P *v9p, uint32_t fid, const char *name,
 745                             const char *symtgt, uint32_t gid, uint16_t tag)
 746 {
 747     P9Req *req;
 748
 749     uint32_t body_size = 4 + 4;
 750     uint16_t string_size = v9fs_string_size(name) + v9fs_string_size(symtgt);
 751
 752     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 753     body_size += string_size;
 754
 755     req = v9fs_req_init(v9p, body_size, P9_TSYMLINK, tag);
 756     v9fs_uint32_write(req, fid);
 757     v9fs_string_write(req, name);
 758     v9fs_string_write(req, symtgt);
 759     v9fs_uint32_write(req, gid);
 760     v9fs_req_send(req);
 761     return req;
 762 }
 763
 764 /* size[4] Rsymlink tag[2] qid[13] */
 765 static void v9fs_rsymlink(P9Req *req, v9fs_qid *qid)
 766 {
 767     v9fs_req_recv(req, P9_RSYMLINK);
 768     if (qid) {
 769         v9fs_memread(req, qid, 13);
 770     } else {
 771         v9fs_memskip(req, 13);
 772     }
 773     v9fs_req_free(req);
 774 }
 775
 776 /* size[4] Tlink tag[2] dfid[4] fid[4] name[s] */
 777 static P9Req *v9fs_tlink(QVirtio9P *v9p, uint32_t dfid, uint32_t fid,
 778                          const char *name, uint16_t tag)
 779 {
 780     P9Req *req;
 781
 782     uint32_t body_size = 4 + 4;
 783     uint16_t string_size = v9fs_string_size(name);
 784
 785     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 786     body_size += string_size;
 787
 788     req = v9fs_req_init(v9p, body_size, P9_TLINK, tag);
 789     v9fs_uint32_write(req, dfid);
 790     v9fs_uint32_write(req, fid);
 791     v9fs_string_write(req, name);
 792     v9fs_req_send(req);
 793     return req;
 794 }
 795
 796 /* size[4] Rlink tag[2] */
 797 static void v9fs_rlink(P9Req *req)
 798 {
 799     v9fs_req_recv(req, P9_RLINK);
 800     v9fs_req_free(req);
 801 }
 802
 803 /* size[4] Tunlinkat tag[2] dirfd[4] name[s] flags[4] */
 804 static P9Req *v9fs_tunlinkat(QVirtio9P *v9p, uint32_t dirfd, const char *name,
 805                              uint32_t flags, uint16_t tag)
 806 {
 807     P9Req *req;
 808
 809     uint32_t body_size = 4 + 4;
 810     uint16_t string_size = v9fs_string_size(name);
 811
 812     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 813     body_size += string_size;
 814
 815     req = v9fs_req_init(v9p, body_size, P9_TUNLINKAT, tag);
 816     v9fs_uint32_write(req, dirfd);
 817     v9fs_string_write(req, name);
 818     v9fs_uint32_write(req, flags);
 819     v9fs_req_send(req);
 820     return req;
 821 }
 822
 823 /* size[4] Runlinkat tag[2] */
 824 static void v9fs_runlinkat(P9Req *req)
 825 {
 826     v9fs_req_recv(req, P9_RUNLINKAT);
 827     v9fs_req_free(req);
 828 }
 829
 830 /* basic readdir test where reply fits into a single response message */
 831 static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
 832 {
 833     QVirtio9P *v9p = obj;
 834     alloc = t_alloc;
 835     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 836     uint16_t nqid;
 837     v9fs_qid qid;
 838     uint32_t count, nentries;
 839     struct V9fsDirent *entries = NULL;
 840     P9Req *req;
 841
 842     do_attach(v9p);
 843     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 844     v9fs_req_wait_for_reply(req, NULL);
 845     v9fs_rwalk(req, &nqid, NULL);
 846     g_assert_cmpint(nqid, ==, 1);
 847
 848     req = v9fs_tlopen(v9p, 1, O_DIRECTORY, 0);
 849     v9fs_req_wait_for_reply(req, NULL);
 850     v9fs_rlopen(req, &qid, NULL);
 851
 852     /*
 853      * submit count = msize - 11, because 11 is the header size of Rreaddir
 854      */
 855     req = v9fs_treaddir(v9p, 1, 0, P9_MAX_SIZE - 11, 0);
 856     v9fs_req_wait_for_reply(req, NULL);
 857     v9fs_rreaddir(req, &count, &nentries, &entries);
 858
 859     /*
 860      * Assuming msize (P9_MAX_SIZE) is large enough so we can retrieve all
 861      * dir entries with only one readdir request.
 862      */
 863     g_assert_cmpint(
 864         nentries, ==,
 865         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 866     );
 867
 868     /*
 869      * Check all file names exist in returned entries, ignore their order
 870      * though.
 871      */
 872     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 873     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 874     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 875         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 876         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 877         g_free(name);
 878     }
 879
 880     v9fs_free_dirents(entries);
 881     g_free(wnames[0]);
 882 }
 883
 884 /* readdir test where overall request is split over several messages */
 885 static void do_readdir_split(QVirtio9P *v9p, uint32_t count)
 886 {
 887     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 888     uint16_t nqid;
 889     v9fs_qid qid;
 890     uint32_t nentries, npartialentries;
 891     struct V9fsDirent *entries, *tail, *partialentries;
 892     P9Req *req;
 893     int fid;
 894     uint64_t offset;
 895
 896     do_attach(v9p);
 897
 898     fid = 1;
 899     offset = 0;
 900     entries = NULL;
 901     nentries = 0;
 902     tail = NULL;
 903
 904     req = v9fs_twalk(v9p, 0, fid, 1, wnames, 0);
 905     v9fs_req_wait_for_reply(req, NULL);
 906     v9fs_rwalk(req, &nqid, NULL);
 907     g_assert_cmpint(nqid, ==, 1);
 908
 909     req = v9fs_tlopen(v9p, fid, O_DIRECTORY, 0);
 910     v9fs_req_wait_for_reply(req, NULL);
 911     v9fs_rlopen(req, &qid, NULL);
 912
 913     /*
 914      * send as many Treaddir requests as required to get all directory
 915      * entries
 916      */
 917     while (true) {
 918         npartialentries = 0;
 919         partialentries = NULL;
 920
 921         req = v9fs_treaddir(v9p, fid, offset, count, 0);
 922         v9fs_req_wait_for_reply(req, NULL);
 923         v9fs_rreaddir(req, &count, &npartialentries, &partialentries);
 924         if (npartialentries > 0 && partialentries) {
 925             if (!entries) {
 926                 entries = partialentries;
 927                 nentries = npartialentries;
 928                 tail = partialentries;
 929             } else {
 930                 tail->next = partialentries;
 931                 nentries += npartialentries;
 932             }
 933             while (tail->next) {
 934                 tail = tail->next;
 935             }
 936             offset = tail->offset;
 937         } else {
 938             break;
 939         }
 940     }
 941
 942     g_assert_cmpint(
 943         nentries, ==,
 944         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 945     );
 946
 947     /*
 948      * Check all file names exist in returned entries, ignore their order
 949      * though.
 950      */
 951     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 952     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 953     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 954         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 955         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 956         g_free(name);
 957     }
 958
 959     v9fs_free_dirents(entries);
 960
 961     g_free(wnames[0]);
 962 }
 963
 964 static void fs_walk_no_slash(void *obj, void *data, QGuestAllocator *t_alloc)
 965 {
 966     QVirtio9P *v9p = obj;
 967     alloc = t_alloc;
 968     char *const wnames[] = { g_strdup(" /") };
 969     P9Req *req;
 970     uint32_t err;
 971
 972     do_attach(v9p);
 973     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 974     v9fs_req_wait_for_reply(req, NULL);
 975     v9fs_rlerror(req, &err);
 976
 977     g_assert_cmpint(err, ==, ENOENT);
 978
 979     g_free(wnames[0]);
 980 }
 981
 982 static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
 983 {
 984     QVirtio9P *v9p = obj;
 985     alloc = t_alloc;
 986     char *const wnames[] = { g_strdup("..") };
 987     v9fs_qid root_qid, *wqid;
 988     P9Req *req;
 989
 990     do_version(v9p);
 991     req = v9fs_tattach(v9p, 0, getuid(), 0);
 992     v9fs_req_wait_for_reply(req, NULL);
 993     v9fs_rattach(req, &root_qid);
 994
 995     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 996     v9fs_req_wait_for_reply(req, NULL);
 997     v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 998
 999     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
1000
1001     g_free(wqid);
1002     g_free(wnames[0]);
1003 }
1004
1005 static void fs_lopen(void *obj, void *data, QGuestAllocator *t_alloc)
1006 {
1007     QVirtio9P *v9p = obj;
1008     alloc = t_alloc;
1009     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
1010     P9Req *req;
1011
1012     do_attach(v9p);
1013     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1014     v9fs_req_wait_for_reply(req, NULL);
1015     v9fs_rwalk(req, NULL, NULL);
1016
1017     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1018     v9fs_req_wait_for_reply(req, NULL);
1019     v9fs_rlopen(req, NULL, NULL);
1020
1021     g_free(wnames[0]);
1022 }
1023
1024 static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
1025 {
1026     QVirtio9P *v9p = obj;
1027     alloc = t_alloc;
1028     static const uint32_t write_count = P9_MAX_SIZE / 2;
1029     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
1030     char *buf = g_malloc0(write_count);
1031     uint32_t count;
1032     P9Req *req;
1033
1034     do_attach(v9p);
1035     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1036     v9fs_req_wait_for_reply(req, NULL);
1037     v9fs_rwalk(req, NULL, NULL);
1038
1039     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1040     v9fs_req_wait_for_reply(req, NULL);
1041     v9fs_rlopen(req, NULL, NULL);
1042
1043     req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
1044     v9fs_req_wait_for_reply(req, NULL);
1045     v9fs_rwrite(req, &count);
1046     g_assert_cmpint(count, ==, write_count);
1047
1048     g_free(buf);
1049     g_free(wnames[0]);
1050 }
1051
1052 static void fs_flush_success(void *obj, void *data, QGuestAllocator *t_alloc)
1053 {
1054     QVirtio9P *v9p = obj;
1055     alloc = t_alloc;
1056     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
1057     P9Req *req, *flush_req;
1058     uint32_t reply_len;
1059     uint8_t should_block;
1060
1061     do_attach(v9p);
1062     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1063     v9fs_req_wait_for_reply(req, NULL);
1064     v9fs_rwalk(req, NULL, NULL);
1065
1066     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1067     v9fs_req_wait_for_reply(req, NULL);
1068     v9fs_rlopen(req, NULL, NULL);
1069
1070     /* This will cause the 9p server to try to write data to the backend,
1071      * until the write request gets cancelled.
1072      */
1073     should_block = 1;
1074     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
1075
1076     flush_req = v9fs_tflush(v9p, req->tag, 1);
1077
1078     /* The write request is supposed to be flushed: the server should just
1079      * mark the write request as used and reply to the flush request.
1080      */
1081     v9fs_req_wait_for_reply(req, &reply_len);
1082     g_assert_cmpint(reply_len, ==, 0);
1083     v9fs_req_free(req);
1084     v9fs_rflush(flush_req);
1085
1086     g_free(wnames[0]);
1087 }
1088
1089 static void fs_flush_ignored(void *obj, void *data, QGuestAllocator *t_alloc)
1090 {
1091     QVirtio9P *v9p = obj;
1092     alloc = t_alloc;
1093     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
1094     P9Req *req, *flush_req;
1095     uint32_t count;
1096     uint8_t should_block;
1097
1098     do_attach(v9p);
1099     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
1100     v9fs_req_wait_for_reply(req, NULL);
1101     v9fs_rwalk(req, NULL, NULL);
1102
1103     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
1104     v9fs_req_wait_for_reply(req, NULL);
1105     v9fs_rlopen(req, NULL, NULL);
1106
1107     /* This will cause the write request to complete right away, before it
1108      * could be actually cancelled.
1109      */
1110     should_block = 0;
1111     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
1112
1113     flush_req = v9fs_tflush(v9p, req->tag, 1);
1114
1115     /* The write request is supposed to complete. The server should
1116      * reply to the write request and the flush request.
1117      */
1118     v9fs_req_wait_for_reply(req, NULL);
1119     v9fs_rwrite(req, &count);
1120     g_assert_cmpint(count, ==, sizeof(should_block));
1121     v9fs_rflush(flush_req);
1122
1123     g_free(wnames[0]);
1124 }
1125
1126 static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
1127 {
1128     char *const name = g_strdup(cname);
1129     uint32_t fid;
1130     P9Req *req;
1131
1132     fid = do_walk(v9p, path);
1133
1134     req = v9fs_tmkdir(v9p, fid, name, 0750, 0, 0);
1135     v9fs_req_wait_for_reply(req, NULL);
1136     v9fs_rmkdir(req, NULL);
1137
1138     g_free(name);
1139 }
1140
1141 /* create a regular file with Tlcreate and return file's fid */
1142 static uint32_t do_lcreate(QVirtio9P *v9p, const char *path,
1143                            const char *cname)
1144 {
1145     char *const name = g_strdup(cname);
1146     uint32_t fid;
1147     P9Req *req;
1148
1149     fid = do_walk(v9p, path);
1150
1151     req = v9fs_tlcreate(v9p, fid, name, 0, 0750, 0, 0);
1152     v9fs_req_wait_for_reply(req, NULL);
1153     v9fs_rlcreate(req, NULL, NULL);
1154
1155     g_free(name);
1156     return fid;
1157 }
1158
1159 /* create symlink named @a clink in directory @a path pointing to @a to */
1160 static void do_symlink(QVirtio9P *v9p, const char *path, const char *clink,
1161                        const char *to)
1162 {
1163     char *const name = g_strdup(clink);
1164     char *const dst = g_strdup(to);
1165     uint32_t fid;
1166     P9Req *req;
1167
1168     fid = do_walk(v9p, path);
1169
1170     req = v9fs_tsymlink(v9p, fid, name, dst, 0, 0);
1171     v9fs_req_wait_for_reply(req, NULL);
1172     v9fs_rsymlink(req, NULL);
1173
1174     g_free(dst);
1175     g_free(name);
1176 }
1177
1178 /* create a hard link named @a clink in directory @a path pointing to @a to */
1179 static void do_hardlink(QVirtio9P *v9p, const char *path, const char *clink,
1180                         const char *to)
1181 {
1182     uint32_t dfid, fid;
1183     P9Req *req;
1184
1185     dfid = do_walk(v9p, path);
1186     fid = do_walk(v9p, to);
1187
1188     req = v9fs_tlink(v9p, dfid, fid, clink, 0);
1189     v9fs_req_wait_for_reply(req, NULL);
1190     v9fs_rlink(req);
1191 }
1192
1193 static void do_unlinkat(QVirtio9P *v9p, const char *atpath, const char *rpath,
1194                         uint32_t flags)
1195 {
1196     char *const name = g_strdup(rpath);
1197     uint32_t fid;
1198     P9Req *req;
1199
1200     fid = do_walk(v9p, atpath);
1201
1202     req = v9fs_tunlinkat(v9p, fid, name, flags, 0);
1203     v9fs_req_wait_for_reply(req, NULL);
1204     v9fs_runlinkat(req);
1205
1206     g_free(name);
1207 }
1208
1209 static void fs_readdir_split_128(void *obj, void *data,
1210                                  QGuestAllocator *t_alloc)
1211 {
1212     alloc = t_alloc;
1213     do_readdir_split(obj, 128);
1214 }
1215
1216 static void fs_readdir_split_256(void *obj, void *data,
1217                                  QGuestAllocator *t_alloc)
1218 {
1219     alloc = t_alloc;
1220     do_readdir_split(obj, 256);
1221 }
1222
1223 static void fs_readdir_split_512(void *obj, void *data,
1224                                  QGuestAllocator *t_alloc)
1225 {
1226     alloc = t_alloc;
1227     do_readdir_split(obj, 512);
1228 }
1229
1230
1231 /* tests using the 9pfs 'local' fs driver */
1232
1233 static void fs_create_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1234 {
1235     QVirtio9P *v9p = obj;
1236     alloc = t_alloc;
1237     struct stat st;
1238     char *root_path = virtio_9p_test_path("");
1239     char *new_dir = virtio_9p_test_path("01");
1240
1241     g_assert(root_path != NULL);
1242
1243     do_attach(v9p);
1244     do_mkdir(v9p, "/", "01");
1245
1246     /* check if created directory really exists now ... */
1247     g_assert(stat(new_dir, &st) == 0);
1248     /* ... and is actually a directory */
1249     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1250
1251     g_free(new_dir);
1252     g_free(root_path);
1253 }
1254
1255 static void fs_unlinkat_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1256 {
1257     QVirtio9P *v9p = obj;
1258     alloc = t_alloc;
1259     struct stat st;
1260     char *root_path = virtio_9p_test_path("");
1261     char *new_dir = virtio_9p_test_path("02");
1262
1263     g_assert(root_path != NULL);
1264
1265     do_attach(v9p);
1266     do_mkdir(v9p, "/", "02");
1267
1268     /* check if created directory really exists now ... */
1269     g_assert(stat(new_dir, &st) == 0);
1270     /* ... and is actually a directory */
1271     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1272
1273     do_unlinkat(v9p, "/", "02", AT_REMOVEDIR);
1274     /* directory should be gone now */
1275     g_assert(stat(new_dir, &st) != 0);
1276
1277     g_free(new_dir);
1278     g_free(root_path);
1279 }
1280
1281 static void fs_create_file(void *obj, void *data, QGuestAllocator *t_alloc)
1282 {
1283     QVirtio9P *v9p = obj;
1284     alloc = t_alloc;
1285     struct stat st;
1286     char *new_file = virtio_9p_test_path("03/1st_file");
1287
1288     do_attach(v9p);
1289     do_mkdir(v9p, "/", "03");
1290     do_lcreate(v9p, "03", "1st_file");
1291
1292     /* check if created file exists now ... */
1293     g_assert(stat(new_file, &st) == 0);
1294     /* ... and is a regular file */
1295     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1296
1297     g_free(new_file);
1298 }
1299
1300 static void fs_unlinkat_file(void *obj, void *data, QGuestAllocator *t_alloc)
1301 {
1302     QVirtio9P *v9p = obj;
1303     alloc = t_alloc;
1304     struct stat st;
1305     char *new_file = virtio_9p_test_path("04/doa_file");
1306
1307     do_attach(v9p);
1308     do_mkdir(v9p, "/", "04");
1309     do_lcreate(v9p, "04", "doa_file");
1310
1311     /* check if created file exists now ... */
1312     g_assert(stat(new_file, &st) == 0);
1313     /* ... and is a regular file */
1314     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1315
1316     do_unlinkat(v9p, "04", "doa_file", 0);
1317     /* file should be gone now */
1318     g_assert(stat(new_file, &st) != 0);
1319
1320     g_free(new_file);
1321 }
1322
1323 static void fs_symlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
1324 {
1325     QVirtio9P *v9p = obj;
1326     alloc = t_alloc;
1327     struct stat st;
1328     char *real_file = virtio_9p_test_path("05/real_file");
1329     char *symlink_file = virtio_9p_test_path("05/symlink_file");
1330
1331     do_attach(v9p);
1332     do_mkdir(v9p, "/", "05");
1333     do_lcreate(v9p, "05", "real_file");
1334     g_assert(stat(real_file, &st) == 0);
1335     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1336
1337     do_symlink(v9p, "05", "symlink_file", "real_file");
1338
1339     /* check if created link exists now */
1340     g_assert(stat(symlink_file, &st) == 0);
1341
1342     g_free(symlink_file);
1343     g_free(real_file);
1344 }
1345
1346 static void fs_unlinkat_symlink(void *obj, void *data,
1347                                 QGuestAllocator *t_alloc)
1348 {
1349     QVirtio9P *v9p = obj;
1350     alloc = t_alloc;
1351     struct stat st;
1352     char *real_file = virtio_9p_test_path("06/real_file");
1353     char *symlink_file = virtio_9p_test_path("06/symlink_file");
1354
1355     do_attach(v9p);
1356     do_mkdir(v9p, "/", "06");
1357     do_lcreate(v9p, "06", "real_file");
1358     g_assert(stat(real_file, &st) == 0);
1359     g_assert((st.st_mode & S_IFMT) == S_IFREG);
1360
1361     do_symlink(v9p, "06", "symlink_file", "real_file");
1362     g_assert(stat(symlink_file, &st) == 0);
1363
1364     do_unlinkat(v9p, "06", "symlink_file", 0);
1365     /* symlink should be gone now */
1366     g_assert(stat(symlink_file, &st) != 0);
1367
1368     g_free(symlink_file);
1369     g_free(real_file);
1370 }
1371
1372 static void fs_hardlink_file(void *obj, void *data, QGuestAllocator *t_alloc)
1373 {
1374     QVirtio9P *v9p = obj;
1375     alloc = t_alloc;
1376     struct stat st_real, st_link;
1377     char *real_file = virtio_9p_test_path("07/real_file");
1378     char *hardlink_file = virtio_9p_test_path("07/hardlink_file");
1379
1380     do_attach(v9p);
1381     do_mkdir(v9p, "/", "07");
1382     do_lcreate(v9p, "07", "real_file");
1383     g_assert(stat(real_file, &st_real) == 0);
1384     g_assert((st_real.st_mode & S_IFMT) == S_IFREG);
1385
1386     do_hardlink(v9p, "07", "hardlink_file", "07/real_file");
1387
1388     /* check if link exists now ... */
1389     g_assert(stat(hardlink_file, &st_link) == 0);
1390     /* ... and it's a hard link, right? */
1391     g_assert((st_link.st_mode & S_IFMT) == S_IFREG);
1392     g_assert(st_link.st_dev == st_real.st_dev);
1393     g_assert(st_link.st_ino == st_real.st_ino);
1394
1395     g_free(hardlink_file);
1396     g_free(real_file);
1397 }
1398
1399 static void fs_unlinkat_hardlink(void *obj, void *data,
1400                                  QGuestAllocator *t_alloc)
1401 {
1402     QVirtio9P *v9p = obj;
1403     alloc = t_alloc;
1404     struct stat st_real, st_link;
1405     char *real_file = virtio_9p_test_path("08/real_file");
1406     char *hardlink_file = virtio_9p_test_path("08/hardlink_file");
1407
1408     do_attach(v9p);
1409     do_mkdir(v9p, "/", "08");
1410     do_lcreate(v9p, "08", "real_file");
1411     g_assert(stat(real_file, &st_real) == 0);
1412     g_assert((st_real.st_mode & S_IFMT) == S_IFREG);
1413
1414     do_hardlink(v9p, "08", "hardlink_file", "08/real_file");
1415     g_assert(stat(hardlink_file, &st_link) == 0);
1416
1417     do_unlinkat(v9p, "08", "hardlink_file", 0);
1418     /* symlink should be gone now */
1419     g_assert(stat(hardlink_file, &st_link) != 0);
1420     /* and old file should still exist */
1421     g_assert(stat(real_file, &st_real) == 0);
1422
1423     g_free(hardlink_file);
1424     g_free(real_file);
1425 }
1426
1427 static void *assign_9p_local_driver(GString *cmd_line, void *arg)
1428 {
1429     virtio_9p_assign_local_driver(cmd_line, "security_model=mapped-xattr");
1430     return arg;
1431 }
1432
1433 static void register_virtio_9p_test(void)
1434 {
1435
1436     QOSGraphTestOptions opts = {
1437     };
1438
1439     /* 9pfs test cases using the 'synth' filesystem driver */
1440     qos_add_test("synth/config", "virtio-9p", pci_config, &opts);
1441     qos_add_test("synth/version/basic", "virtio-9p", fs_version,  &opts);
1442     qos_add_test("synth/attach/basic", "virtio-9p", fs_attach,  &opts);
1443     qos_add_test("synth/walk/basic", "virtio-9p", fs_walk,  &opts);
1444     qos_add_test("synth/walk/no_slash", "virtio-9p", fs_walk_no_slash,
1445                   &opts);
1446     qos_add_test("synth/walk/dotdot_from_root", "virtio-9p",
1447                  fs_walk_dotdot,  &opts);
1448     qos_add_test("synth/lopen/basic", "virtio-9p", fs_lopen,  &opts);
1449     qos_add_test("synth/write/basic", "virtio-9p", fs_write,  &opts);
1450     qos_add_test("synth/flush/success", "virtio-9p", fs_flush_success,
1451                   &opts);
1452     qos_add_test("synth/flush/ignored", "virtio-9p", fs_flush_ignored,
1453                   &opts);
1454     qos_add_test("synth/readdir/basic", "virtio-9p", fs_readdir,  &opts);
1455     qos_add_test("synth/readdir/split_512", "virtio-9p",
1456                  fs_readdir_split_512,  &opts);
1457     qos_add_test("synth/readdir/split_256", "virtio-9p",
1458                  fs_readdir_split_256,  &opts);
1459     qos_add_test("synth/readdir/split_128", "virtio-9p",
1460                  fs_readdir_split_128,  &opts);
1461
1462
1463     /* 9pfs test cases using the 'local' filesystem driver */
1464
1465     /*
1466      * XXX: Until we are sure that these tests can run everywhere,
1467      * keep them as "slow" so that they aren't run with "make check".
1468      */
1469     if (!g_test_slow()) {
1470         return;
1471     }
1472
1473     opts.before = assign_9p_local_driver;
1474     qos_add_test("local/config", "virtio-9p", pci_config,  &opts);
1475     qos_add_test("local/create_dir", "virtio-9p", fs_create_dir, &opts);
1476     qos_add_test("local/unlinkat_dir", "virtio-9p", fs_unlinkat_dir, &opts);
1477     qos_add_test("local/create_file", "virtio-9p", fs_create_file, &opts);
1478     qos_add_test("local/unlinkat_file", "virtio-9p", fs_unlinkat_file, &opts);
1479     qos_add_test("local/symlink_file", "virtio-9p", fs_symlink_file, &opts);
1480     qos_add_test("local/unlinkat_symlink", "virtio-9p", fs_unlinkat_symlink,
1481                  &opts);
1482     qos_add_test("local/hardlink_file", "virtio-9p", fs_hardlink_file, &opts);
1483     qos_add_test("local/unlinkat_hardlink", "virtio-9p", fs_unlinkat_hardlink,
1484                  &opts);
1485 }
1486
1487 libqos_init(register_virtio_9p_test);
1488
1489 static void __attribute__((constructor)) construct_9p_test(void)
1490 {
1491     /* make sure test dir for the 'local' tests exists */
1492     virtio_9p_create_local_test_dir();
1493 }
1494
1495 static void __attribute__((destructor)) destruct_9p_test(void)
1496 {
1497     /* remove previously created test dir when test suite completed */
1498     virtio_9p_remove_local_test_dir();
1499 }