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_RFLUSH ? "RFLUSH" :
 262         id == P9_RREADDIR ? "READDIR" :
 263         "<unknown>";
 264 }
 265
 266 static void v9fs_req_wait_for_reply(P9Req *req, uint32_t *len)
 267 {
 268     QVirtio9P *v9p = req->v9p;
 269
 270     qvirtio_wait_used_elem(req->qts, v9p->vdev, v9p->vq, req->free_head, len,
 271                            QVIRTIO_9P_TIMEOUT_US);
 272 }
 273
 274 static void v9fs_req_recv(P9Req *req, uint8_t id)
 275 {
 276     P9Hdr hdr;
 277
 278     v9fs_memread(req, &hdr, 7);
 279     hdr.size = ldl_le_p(&hdr.size);
 280     hdr.tag = lduw_le_p(&hdr.tag);
 281
 282     g_assert_cmpint(hdr.size, >=, 7);
 283     g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE);
 284     g_assert_cmpint(hdr.tag, ==, req->tag);
 285
 286     if (hdr.id != id) {
 287         g_printerr("Received response %d (%s) instead of %d (%s)\n",
 288                    hdr.id, rmessage_name(hdr.id), id, rmessage_name(id));
 289
 290         if (hdr.id == P9_RLERROR) {
 291             uint32_t err;
 292             v9fs_uint32_read(req, &err);
 293             g_printerr("Rlerror has errno %d (%s)\n", err, strerror(err));
 294         }
 295     }
 296     g_assert_cmpint(hdr.id, ==, id);
 297 }
 298
 299 static void v9fs_req_free(P9Req *req)
 300 {
 301     guest_free(alloc, req->t_msg);
 302     guest_free(alloc, req->r_msg);
 303     g_free(req);
 304 }
 305
 306 /* size[4] Rlerror tag[2] ecode[4] */
 307 static void v9fs_rlerror(P9Req *req, uint32_t *err)
 308 {
 309     v9fs_req_recv(req, P9_RLERROR);
 310     v9fs_uint32_read(req, err);
 311     v9fs_req_free(req);
 312 }
 313
 314 /* size[4] Tversion tag[2] msize[4] version[s] */
 315 static P9Req *v9fs_tversion(QVirtio9P *v9p, uint32_t msize, const char *version,
 316                             uint16_t tag)
 317 {
 318     P9Req *req;
 319     uint32_t body_size = 4;
 320     uint16_t string_size = v9fs_string_size(version);
 321
 322     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 323     body_size += string_size;
 324     req = v9fs_req_init(v9p, body_size, P9_TVERSION, tag);
 325
 326     v9fs_uint32_write(req, msize);
 327     v9fs_string_write(req, version);
 328     v9fs_req_send(req);
 329     return req;
 330 }
 331
 332 /* size[4] Rversion tag[2] msize[4] version[s] */
 333 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version)
 334 {
 335     uint32_t msize;
 336
 337     v9fs_req_recv(req, P9_RVERSION);
 338     v9fs_uint32_read(req, &msize);
 339
 340     g_assert_cmpint(msize, ==, P9_MAX_SIZE);
 341
 342     if (len || version) {
 343         v9fs_string_read(req, len, version);
 344     }
 345
 346     v9fs_req_free(req);
 347 }
 348
 349 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */
 350 static P9Req *v9fs_tattach(QVirtio9P *v9p, uint32_t fid, uint32_t n_uname,
 351                            uint16_t tag)
 352 {
 353     const char *uname = ""; /* ignored by QEMU */
 354     const char *aname = ""; /* ignored by QEMU */
 355     P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, tag);
 356
 357     v9fs_uint32_write(req, fid);
 358     v9fs_uint32_write(req, P9_NOFID);
 359     v9fs_string_write(req, uname);
 360     v9fs_string_write(req, aname);
 361     v9fs_uint32_write(req, n_uname);
 362     v9fs_req_send(req);
 363     return req;
 364 }
 365
 366 typedef char v9fs_qid[13];
 367
 368 /* size[4] Rattach tag[2] qid[13] */
 369 static void v9fs_rattach(P9Req *req, v9fs_qid *qid)
 370 {
 371     v9fs_req_recv(req, P9_RATTACH);
 372     if (qid) {
 373         v9fs_memread(req, qid, 13);
 374     }
 375     v9fs_req_free(req);
 376 }
 377
 378 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */
 379 static P9Req *v9fs_twalk(QVirtio9P *v9p, uint32_t fid, uint32_t newfid,
 380                          uint16_t nwname, char *const wnames[], uint16_t tag)
 381 {
 382     P9Req *req;
 383     int i;
 384     uint32_t body_size = 4 + 4 + 2;
 385
 386     for (i = 0; i < nwname; i++) {
 387         uint16_t wname_size = v9fs_string_size(wnames[i]);
 388
 389         g_assert_cmpint(body_size, <=, UINT32_MAX - wname_size);
 390         body_size += wname_size;
 391     }
 392     req = v9fs_req_init(v9p,  body_size, P9_TWALK, tag);
 393     v9fs_uint32_write(req, fid);
 394     v9fs_uint32_write(req, newfid);
 395     v9fs_uint16_write(req, nwname);
 396     for (i = 0; i < nwname; i++) {
 397         v9fs_string_write(req, wnames[i]);
 398     }
 399     v9fs_req_send(req);
 400     return req;
 401 }
 402
 403 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */
 404 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid)
 405 {
 406     uint16_t local_nwqid;
 407
 408     v9fs_req_recv(req, P9_RWALK);
 409     v9fs_uint16_read(req, &local_nwqid);
 410     if (nwqid) {
 411         *nwqid = local_nwqid;
 412     }
 413     if (wqid) {
 414         *wqid = g_malloc(local_nwqid * 13);
 415         v9fs_memread(req, *wqid, local_nwqid * 13);
 416     }
 417     v9fs_req_free(req);
 418 }
 419
 420 /* size[4] Treaddir tag[2] fid[4] offset[8] count[4] */
 421 static P9Req *v9fs_treaddir(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 422                             uint32_t count, uint16_t tag)
 423 {
 424     P9Req *req;
 425
 426     req = v9fs_req_init(v9p, 4 + 8 + 4, P9_TREADDIR, tag);
 427     v9fs_uint32_write(req, fid);
 428     v9fs_uint64_write(req, offset);
 429     v9fs_uint32_write(req, count);
 430     v9fs_req_send(req);
 431     return req;
 432 }
 433
 434 struct V9fsDirent {
 435     v9fs_qid qid;
 436     uint64_t offset;
 437     uint8_t type;
 438     char *name;
 439     struct V9fsDirent *next;
 440 };
 441
 442 /* size[4] Rreaddir tag[2] count[4] data[count] */
 443 static void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries,
 444                           struct V9fsDirent **entries)
 445 {
 446     uint32_t local_count;
 447     struct V9fsDirent *e = NULL;
 448     uint16_t slen;
 449     uint32_t n = 0;
 450
 451     v9fs_req_recv(req, P9_RREADDIR);
 452     v9fs_uint32_read(req, &local_count);
 453
 454     if (count) {
 455         *count = local_count;
 456     }
 457
 458     for (int32_t togo = (int32_t)local_count;
 459          togo >= 13 + 8 + 1 + 2;
 460          togo -= 13 + 8 + 1 + 2 + slen, ++n)
 461     {
 462         if (!e) {
 463             e = g_malloc(sizeof(struct V9fsDirent));
 464             if (entries) {
 465                 *entries = e;
 466             }
 467         } else {
 468             e = e->next = g_malloc(sizeof(struct V9fsDirent));
 469         }
 470         e->next = NULL;
 471         /* qid[13] offset[8] type[1] name[s] */
 472         v9fs_memread(req, &e->qid, 13);
 473         v9fs_uint64_read(req, &e->offset);
 474         v9fs_uint8_read(req, &e->type);
 475         v9fs_string_read(req, &slen, &e->name);
 476     }
 477
 478     if (nentries) {
 479         *nentries = n;
 480     }
 481
 482     v9fs_req_free(req);
 483 }
 484
 485 static void v9fs_free_dirents(struct V9fsDirent *e)
 486 {
 487     struct V9fsDirent *next = NULL;
 488
 489     for (; e; e = next) {
 490         next = e->next;
 491         g_free(e->name);
 492         g_free(e);
 493     }
 494 }
 495
 496 /* size[4] Tlopen tag[2] fid[4] flags[4] */
 497 static P9Req *v9fs_tlopen(QVirtio9P *v9p, uint32_t fid, uint32_t flags,
 498                           uint16_t tag)
 499 {
 500     P9Req *req;
 501
 502     req = v9fs_req_init(v9p,  4 + 4, P9_TLOPEN, tag);
 503     v9fs_uint32_write(req, fid);
 504     v9fs_uint32_write(req, flags);
 505     v9fs_req_send(req);
 506     return req;
 507 }
 508
 509 /* size[4] Rlopen tag[2] qid[13] iounit[4] */
 510 static void v9fs_rlopen(P9Req *req, v9fs_qid *qid, uint32_t *iounit)
 511 {
 512     v9fs_req_recv(req, P9_RLOPEN);
 513     if (qid) {
 514         v9fs_memread(req, qid, 13);
 515     } else {
 516         v9fs_memskip(req, 13);
 517     }
 518     if (iounit) {
 519         v9fs_uint32_read(req, iounit);
 520     }
 521     v9fs_req_free(req);
 522 }
 523
 524 /* size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count] */
 525 static P9Req *v9fs_twrite(QVirtio9P *v9p, uint32_t fid, uint64_t offset,
 526                           uint32_t count, const void *data, uint16_t tag)
 527 {
 528     P9Req *req;
 529     uint32_t body_size = 4 + 8 + 4;
 530
 531     g_assert_cmpint(body_size, <=, UINT32_MAX - count);
 532     body_size += count;
 533     req = v9fs_req_init(v9p,  body_size, P9_TWRITE, tag);
 534     v9fs_uint32_write(req, fid);
 535     v9fs_uint64_write(req, offset);
 536     v9fs_uint32_write(req, count);
 537     v9fs_memwrite(req, data, count);
 538     v9fs_req_send(req);
 539     return req;
 540 }
 541
 542 /* size[4] Rwrite tag[2] count[4] */
 543 static void v9fs_rwrite(P9Req *req, uint32_t *count)
 544 {
 545     v9fs_req_recv(req, P9_RWRITE);
 546     if (count) {
 547         v9fs_uint32_read(req, count);
 548     }
 549     v9fs_req_free(req);
 550 }
 551
 552 /* size[4] Tflush tag[2] oldtag[2] */
 553 static P9Req *v9fs_tflush(QVirtio9P *v9p, uint16_t oldtag, uint16_t tag)
 554 {
 555     P9Req *req;
 556
 557     req = v9fs_req_init(v9p,  2, P9_TFLUSH, tag);
 558     v9fs_uint32_write(req, oldtag);
 559     v9fs_req_send(req);
 560     return req;
 561 }
 562
 563 /* size[4] Rflush tag[2] */
 564 static void v9fs_rflush(P9Req *req)
 565 {
 566     v9fs_req_recv(req, P9_RFLUSH);
 567     v9fs_req_free(req);
 568 }
 569
 570 static void do_version(QVirtio9P *v9p)
 571 {
 572     const char *version = "9P2000.L";
 573     uint16_t server_len;
 574     char *server_version;
 575     P9Req *req;
 576
 577     req = v9fs_tversion(v9p, P9_MAX_SIZE, version, P9_NOTAG);
 578     v9fs_req_wait_for_reply(req, NULL);
 579     v9fs_rversion(req, &server_len, &server_version);
 580
 581     g_assert_cmpmem(server_version, server_len, version, strlen(version));
 582
 583     g_free(server_version);
 584 }
 585
 586 static void fs_version(void *obj, void *data, QGuestAllocator *t_alloc)
 587 {
 588     alloc = t_alloc;
 589     do_version(obj);
 590 }
 591
 592 static void do_attach(QVirtio9P *v9p)
 593 {
 594     P9Req *req;
 595
 596     do_version(v9p);
 597     req = v9fs_tattach(v9p, 0, getuid(), 0);
 598     v9fs_req_wait_for_reply(req, NULL);
 599     v9fs_rattach(req, NULL);
 600 }
 601
 602 static void fs_attach(void *obj, void *data, QGuestAllocator *t_alloc)
 603 {
 604     alloc = t_alloc;
 605     do_attach(obj);
 606 }
 607
 608 static void fs_walk(void *obj, void *data, QGuestAllocator *t_alloc)
 609 {
 610     QVirtio9P *v9p = obj;
 611     alloc = t_alloc;
 612     char *wnames[P9_MAXWELEM];
 613     uint16_t nwqid;
 614     v9fs_qid *wqid;
 615     int i;
 616     P9Req *req;
 617
 618     for (i = 0; i < P9_MAXWELEM; i++) {
 619         wnames[i] = g_strdup_printf(QTEST_V9FS_SYNTH_WALK_FILE, i);
 620     }
 621
 622     do_attach(v9p);
 623     req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames, 0);
 624     v9fs_req_wait_for_reply(req, NULL);
 625     v9fs_rwalk(req, &nwqid, &wqid);
 626
 627     g_assert_cmpint(nwqid, ==, P9_MAXWELEM);
 628
 629     for (i = 0; i < P9_MAXWELEM; i++) {
 630         g_free(wnames[i]);
 631     }
 632
 633     g_free(wqid);
 634 }
 635
 636 static bool fs_dirents_contain_name(struct V9fsDirent *e, const char* name)
 637 {
 638     for (; e; e = e->next) {
 639         if (!strcmp(e->name, name)) {
 640             return true;
 641         }
 642     }
 643     return false;
 644 }
 645
 646 /* size[4] Tmkdir tag[2] dfid[4] name[s] mode[4] gid[4] */
 647 static P9Req *v9fs_tmkdir(QVirtio9P *v9p, uint32_t dfid, const char *name,
 648                           uint32_t mode, uint32_t gid, uint16_t tag)
 649 {
 650     P9Req *req;
 651
 652     uint32_t body_size = 4 + 4 + 4;
 653     uint16_t string_size = v9fs_string_size(name);
 654
 655     g_assert_cmpint(body_size, <=, UINT32_MAX - string_size);
 656     body_size += string_size;
 657
 658     req = v9fs_req_init(v9p, body_size, P9_TMKDIR, tag);
 659     v9fs_uint32_write(req, dfid);
 660     v9fs_string_write(req, name);
 661     v9fs_uint32_write(req, mode);
 662     v9fs_uint32_write(req, gid);
 663     v9fs_req_send(req);
 664     return req;
 665 }
 666
 667 /* size[4] Rmkdir tag[2] qid[13] */
 668 static void v9fs_rmkdir(P9Req *req, v9fs_qid *qid)
 669 {
 670     v9fs_req_recv(req, P9_RMKDIR);
 671     if (qid) {
 672         v9fs_memread(req, qid, 13);
 673     } else {
 674         v9fs_memskip(req, 13);
 675     }
 676     v9fs_req_free(req);
 677 }
 678
 679 /* basic readdir test where reply fits into a single response message */
 680 static void fs_readdir(void *obj, void *data, QGuestAllocator *t_alloc)
 681 {
 682     QVirtio9P *v9p = obj;
 683     alloc = t_alloc;
 684     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 685     uint16_t nqid;
 686     v9fs_qid qid;
 687     uint32_t count, nentries;
 688     struct V9fsDirent *entries = NULL;
 689     P9Req *req;
 690
 691     do_attach(v9p);
 692     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 693     v9fs_req_wait_for_reply(req, NULL);
 694     v9fs_rwalk(req, &nqid, NULL);
 695     g_assert_cmpint(nqid, ==, 1);
 696
 697     req = v9fs_tlopen(v9p, 1, O_DIRECTORY, 0);
 698     v9fs_req_wait_for_reply(req, NULL);
 699     v9fs_rlopen(req, &qid, NULL);
 700
 701     /*
 702      * submit count = msize - 11, because 11 is the header size of Rreaddir
 703      */
 704     req = v9fs_treaddir(v9p, 1, 0, P9_MAX_SIZE - 11, 0);
 705     v9fs_req_wait_for_reply(req, NULL);
 706     v9fs_rreaddir(req, &count, &nentries, &entries);
 707
 708     /*
 709      * Assuming msize (P9_MAX_SIZE) is large enough so we can retrieve all
 710      * dir entries with only one readdir request.
 711      */
 712     g_assert_cmpint(
 713         nentries, ==,
 714         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 715     );
 716
 717     /*
 718      * Check all file names exist in returned entries, ignore their order
 719      * though.
 720      */
 721     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 722     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 723     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 724         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 725         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 726         g_free(name);
 727     }
 728
 729     v9fs_free_dirents(entries);
 730     g_free(wnames[0]);
 731 }
 732
 733 /* readdir test where overall request is split over several messages */
 734 static void do_readdir_split(QVirtio9P *v9p, uint32_t count)
 735 {
 736     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_READDIR_DIR) };
 737     uint16_t nqid;
 738     v9fs_qid qid;
 739     uint32_t nentries, npartialentries;
 740     struct V9fsDirent *entries, *tail, *partialentries;
 741     P9Req *req;
 742     int fid;
 743     uint64_t offset;
 744
 745     do_attach(v9p);
 746
 747     fid = 1;
 748     offset = 0;
 749     entries = NULL;
 750     nentries = 0;
 751     tail = NULL;
 752
 753     req = v9fs_twalk(v9p, 0, fid, 1, wnames, 0);
 754     v9fs_req_wait_for_reply(req, NULL);
 755     v9fs_rwalk(req, &nqid, NULL);
 756     g_assert_cmpint(nqid, ==, 1);
 757
 758     req = v9fs_tlopen(v9p, fid, O_DIRECTORY, 0);
 759     v9fs_req_wait_for_reply(req, NULL);
 760     v9fs_rlopen(req, &qid, NULL);
 761
 762     /*
 763      * send as many Treaddir requests as required to get all directory
 764      * entries
 765      */
 766     while (true) {
 767         npartialentries = 0;
 768         partialentries = NULL;
 769
 770         req = v9fs_treaddir(v9p, fid, offset, count, 0);
 771         v9fs_req_wait_for_reply(req, NULL);
 772         v9fs_rreaddir(req, &count, &npartialentries, &partialentries);
 773         if (npartialentries > 0 && partialentries) {
 774             if (!entries) {
 775                 entries = partialentries;
 776                 nentries = npartialentries;
 777                 tail = partialentries;
 778             } else {
 779                 tail->next = partialentries;
 780                 nentries += npartialentries;
 781             }
 782             while (tail->next) {
 783                 tail = tail->next;
 784             }
 785             offset = tail->offset;
 786         } else {
 787             break;
 788         }
 789     }
 790
 791     g_assert_cmpint(
 792         nentries, ==,
 793         QTEST_V9FS_SYNTH_READDIR_NFILES + 2 /* "." and ".." */
 794     );
 795
 796     /*
 797      * Check all file names exist in returned entries, ignore their order
 798      * though.
 799      */
 800     g_assert_cmpint(fs_dirents_contain_name(entries, "."), ==, true);
 801     g_assert_cmpint(fs_dirents_contain_name(entries, ".."), ==, true);
 802     for (int i = 0; i < QTEST_V9FS_SYNTH_READDIR_NFILES; ++i) {
 803         char *name = g_strdup_printf(QTEST_V9FS_SYNTH_READDIR_FILE, i);
 804         g_assert_cmpint(fs_dirents_contain_name(entries, name), ==, true);
 805         g_free(name);
 806     }
 807
 808     v9fs_free_dirents(entries);
 809
 810     g_free(wnames[0]);
 811 }
 812
 813 static void fs_walk_no_slash(void *obj, void *data, QGuestAllocator *t_alloc)
 814 {
 815     QVirtio9P *v9p = obj;
 816     alloc = t_alloc;
 817     char *const wnames[] = { g_strdup(" /") };
 818     P9Req *req;
 819     uint32_t err;
 820
 821     do_attach(v9p);
 822     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 823     v9fs_req_wait_for_reply(req, NULL);
 824     v9fs_rlerror(req, &err);
 825
 826     g_assert_cmpint(err, ==, ENOENT);
 827
 828     g_free(wnames[0]);
 829 }
 830
 831 static void fs_walk_dotdot(void *obj, void *data, QGuestAllocator *t_alloc)
 832 {
 833     QVirtio9P *v9p = obj;
 834     alloc = t_alloc;
 835     char *const wnames[] = { g_strdup("..") };
 836     v9fs_qid root_qid, *wqid;
 837     P9Req *req;
 838
 839     do_version(v9p);
 840     req = v9fs_tattach(v9p, 0, getuid(), 0);
 841     v9fs_req_wait_for_reply(req, NULL);
 842     v9fs_rattach(req, &root_qid);
 843
 844     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 845     v9fs_req_wait_for_reply(req, NULL);
 846     v9fs_rwalk(req, NULL, &wqid); /* We now we'll get one qid */
 847
 848     g_assert_cmpmem(&root_qid, 13, wqid[0], 13);
 849
 850     g_free(wqid);
 851     g_free(wnames[0]);
 852 }
 853
 854 static void fs_lopen(void *obj, void *data, QGuestAllocator *t_alloc)
 855 {
 856     QVirtio9P *v9p = obj;
 857     alloc = t_alloc;
 858     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_LOPEN_FILE) };
 859     P9Req *req;
 860
 861     do_attach(v9p);
 862     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 863     v9fs_req_wait_for_reply(req, NULL);
 864     v9fs_rwalk(req, NULL, NULL);
 865
 866     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 867     v9fs_req_wait_for_reply(req, NULL);
 868     v9fs_rlopen(req, NULL, NULL);
 869
 870     g_free(wnames[0]);
 871 }
 872
 873 static void fs_write(void *obj, void *data, QGuestAllocator *t_alloc)
 874 {
 875     QVirtio9P *v9p = obj;
 876     alloc = t_alloc;
 877     static const uint32_t write_count = P9_MAX_SIZE / 2;
 878     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_WRITE_FILE) };
 879     char *buf = g_malloc0(write_count);
 880     uint32_t count;
 881     P9Req *req;
 882
 883     do_attach(v9p);
 884     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 885     v9fs_req_wait_for_reply(req, NULL);
 886     v9fs_rwalk(req, NULL, NULL);
 887
 888     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 889     v9fs_req_wait_for_reply(req, NULL);
 890     v9fs_rlopen(req, NULL, NULL);
 891
 892     req = v9fs_twrite(v9p, 1, 0, write_count, buf, 0);
 893     v9fs_req_wait_for_reply(req, NULL);
 894     v9fs_rwrite(req, &count);
 895     g_assert_cmpint(count, ==, write_count);
 896
 897     g_free(buf);
 898     g_free(wnames[0]);
 899 }
 900
 901 static void fs_flush_success(void *obj, void *data, QGuestAllocator *t_alloc)
 902 {
 903     QVirtio9P *v9p = obj;
 904     alloc = t_alloc;
 905     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 906     P9Req *req, *flush_req;
 907     uint32_t reply_len;
 908     uint8_t should_block;
 909
 910     do_attach(v9p);
 911     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 912     v9fs_req_wait_for_reply(req, NULL);
 913     v9fs_rwalk(req, NULL, NULL);
 914
 915     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 916     v9fs_req_wait_for_reply(req, NULL);
 917     v9fs_rlopen(req, NULL, NULL);
 918
 919     /* This will cause the 9p server to try to write data to the backend,
 920      * until the write request gets cancelled.
 921      */
 922     should_block = 1;
 923     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 924
 925     flush_req = v9fs_tflush(v9p, req->tag, 1);
 926
 927     /* The write request is supposed to be flushed: the server should just
 928      * mark the write request as used and reply to the flush request.
 929      */
 930     v9fs_req_wait_for_reply(req, &reply_len);
 931     g_assert_cmpint(reply_len, ==, 0);
 932     v9fs_req_free(req);
 933     v9fs_rflush(flush_req);
 934
 935     g_free(wnames[0]);
 936 }
 937
 938 static void fs_flush_ignored(void *obj, void *data, QGuestAllocator *t_alloc)
 939 {
 940     QVirtio9P *v9p = obj;
 941     alloc = t_alloc;
 942     char *const wnames[] = { g_strdup(QTEST_V9FS_SYNTH_FLUSH_FILE) };
 943     P9Req *req, *flush_req;
 944     uint32_t count;
 945     uint8_t should_block;
 946
 947     do_attach(v9p);
 948     req = v9fs_twalk(v9p, 0, 1, 1, wnames, 0);
 949     v9fs_req_wait_for_reply(req, NULL);
 950     v9fs_rwalk(req, NULL, NULL);
 951
 952     req = v9fs_tlopen(v9p, 1, O_WRONLY, 0);
 953     v9fs_req_wait_for_reply(req, NULL);
 954     v9fs_rlopen(req, NULL, NULL);
 955
 956     /* This will cause the write request to complete right away, before it
 957      * could be actually cancelled.
 958      */
 959     should_block = 0;
 960     req = v9fs_twrite(v9p, 1, 0, sizeof(should_block), &should_block, 0);
 961
 962     flush_req = v9fs_tflush(v9p, req->tag, 1);
 963
 964     /* The write request is supposed to complete. The server should
 965      * reply to the write request and the flush request.
 966      */
 967     v9fs_req_wait_for_reply(req, NULL);
 968     v9fs_rwrite(req, &count);
 969     g_assert_cmpint(count, ==, sizeof(should_block));
 970     v9fs_rflush(flush_req);
 971
 972     g_free(wnames[0]);
 973 }
 974
 975 static void do_mkdir(QVirtio9P *v9p, const char *path, const char *cname)
 976 {
 977     char **wnames;
 978     char *const name = g_strdup(cname);
 979     P9Req *req;
 980     const uint32_t fid = genfid();
 981
 982     int nwnames = split(path, "/", &wnames);
 983
 984     req = v9fs_twalk(v9p, 0, fid, nwnames, wnames, 0);
 985     v9fs_req_wait_for_reply(req, NULL);
 986     v9fs_rwalk(req, NULL, NULL);
 987
 988     req = v9fs_tmkdir(v9p, fid, name, 0750, 0, 0);
 989     v9fs_req_wait_for_reply(req, NULL);
 990     v9fs_rmkdir(req, NULL);
 991
 992     g_free(name);
 993     split_free(&wnames);
 994 }
 995
 996 static void fs_readdir_split_128(void *obj, void *data,
 997                                  QGuestAllocator *t_alloc)
 998 {
 999     alloc = t_alloc;
1000     do_readdir_split(obj, 128);
1001 }
1002
1003 static void fs_readdir_split_256(void *obj, void *data,
1004                                  QGuestAllocator *t_alloc)
1005 {
1006     alloc = t_alloc;
1007     do_readdir_split(obj, 256);
1008 }
1009
1010 static void fs_readdir_split_512(void *obj, void *data,
1011                                  QGuestAllocator *t_alloc)
1012 {
1013     alloc = t_alloc;
1014     do_readdir_split(obj, 512);
1015 }
1016
1017
1018 /* tests using the 9pfs 'local' fs driver */
1019
1020 static void fs_create_dir(void *obj, void *data, QGuestAllocator *t_alloc)
1021 {
1022     QVirtio9P *v9p = obj;
1023     alloc = t_alloc;
1024     struct stat st;
1025     char *root_path = virtio_9p_test_path("");
1026     char *new_dir = virtio_9p_test_path("01");
1027
1028     g_assert(root_path != NULL);
1029
1030     do_attach(v9p);
1031     do_mkdir(v9p, "/", "01");
1032
1033     /* check if created directory really exists now ... */
1034     g_assert(stat(new_dir, &st) == 0);
1035     /* ... and is actually a directory */
1036     g_assert((st.st_mode & S_IFMT) == S_IFDIR);
1037
1038     g_free(new_dir);
1039     g_free(root_path);
1040 }
1041
1042 static void *assign_9p_local_driver(GString *cmd_line, void *arg)
1043 {
1044     virtio_9p_assign_local_driver(cmd_line, "security_model=mapped-xattr");
1045     return arg;
1046 }
1047
1048 static void register_virtio_9p_test(void)
1049 {
1050
1051     QOSGraphTestOptions opts = {
1052     };
1053
1054     /* 9pfs test cases using the 'synth' filesystem driver */
1055     qos_add_test("synth/config", "virtio-9p", pci_config, &opts);
1056     qos_add_test("synth/version/basic", "virtio-9p", fs_version,  &opts);
1057     qos_add_test("synth/attach/basic", "virtio-9p", fs_attach,  &opts);
1058     qos_add_test("synth/walk/basic", "virtio-9p", fs_walk,  &opts);
1059     qos_add_test("synth/walk/no_slash", "virtio-9p", fs_walk_no_slash,
1060                   &opts);
1061     qos_add_test("synth/walk/dotdot_from_root", "virtio-9p",
1062                  fs_walk_dotdot,  &opts);
1063     qos_add_test("synth/lopen/basic", "virtio-9p", fs_lopen,  &opts);
1064     qos_add_test("synth/write/basic", "virtio-9p", fs_write,  &opts);
1065     qos_add_test("synth/flush/success", "virtio-9p", fs_flush_success,
1066                   &opts);
1067     qos_add_test("synth/flush/ignored", "virtio-9p", fs_flush_ignored,
1068                   &opts);
1069     qos_add_test("synth/readdir/basic", "virtio-9p", fs_readdir,  &opts);
1070     qos_add_test("synth/readdir/split_512", "virtio-9p",
1071                  fs_readdir_split_512,  &opts);
1072     qos_add_test("synth/readdir/split_256", "virtio-9p",
1073                  fs_readdir_split_256,  &opts);
1074     qos_add_test("synth/readdir/split_128", "virtio-9p",
1075                  fs_readdir_split_128,  &opts);
1076
1077
1078     /* 9pfs test cases using the 'local' filesystem driver */
1079     opts.before = assign_9p_local_driver;
1080     qos_add_test("local/config", "virtio-9p", pci_config,  &opts);
1081     qos_add_test("local/create_dir", "virtio-9p", fs_create_dir, &opts);
1082 }
1083
1084 libqos_init(register_virtio_9p_test);
1085
1086 static void __attribute__((constructor)) construct_9p_test(void)
1087 {
1088     /* make sure test dir for the 'local' tests exists */
1089     virtio_9p_create_local_test_dir();
1090 }
1091
1092 static void __attribute__((destructor)) destruct_9p_test(void)
1093 {
1094     /* remove previously created test dir when test suite completed */
1095     virtio_9p_remove_local_test_dir();
1096 }