source3/modules/vfs_cap.c

   1 /*
   2  * CAP VFS module for Samba 3.x Version 0.3
   3  *
   4  * Copyright (C) Tim Potter, 1999-2000
   5  * Copyright (C) Alexander Bokovoy, 2002-2003
   6  * Copyright (C) Stefan (metze) Metzmacher, 2003
   7  * Copyright (C) TAKAHASHI Motonobu (monyo), 2003
   8  * Copyright (C) Jeremy Allison, 2007
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "includes.h"
  26 #include "smbd/smbd.h"
  27
  28 /* cap functions */
  29 static char *capencode(TALLOC_CTX *ctx, const char *from);
  30 static char *capdecode(TALLOC_CTX *ctx, const char *from);
  31
  32 static uint64_t cap_disk_free(vfs_handle_struct *handle,
  33                         const struct smb_filename *smb_fname,
  34                         uint64_t *bsize,
  35                         uint64_t *dfree,
  36                         uint64_t *dsize)
  37 {
  38         char *capname = capencode(talloc_tos(), smb_fname->base_name);
  39         struct smb_filename *cap_smb_fname = NULL;
  40
  41         if (!capname) {
  42                 errno = ENOMEM;
  43                 return (uint64_t)-1;
  44         }
  45         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
  46                                         capname,
  47                                         NULL,
  48                                         NULL,
  49                                         smb_fname->twrp,
  50                                         smb_fname->flags);
  51         if (cap_smb_fname == NULL) {
  52                 TALLOC_FREE(capname);
  53                 errno = ENOMEM;
  54                 return (uint64_t)-1;
  55         }
  56         return SMB_VFS_NEXT_DISK_FREE(handle, cap_smb_fname,
  57                         bsize, dfree, dsize);
  58 }
  59
  60 static int cap_get_quota(vfs_handle_struct *handle,
  61                         const struct smb_filename *smb_fname,
  62                         enum SMB_QUOTA_TYPE qtype,
  63                         unid_t id,
  64                         SMB_DISK_QUOTA *dq)
  65 {
  66         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
  67         struct smb_filename *cap_smb_fname = NULL;
  68
  69         if (!cappath) {
  70                 errno = ENOMEM;
  71                 return -1;
  72         }
  73         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
  74                                         cappath,
  75                                         NULL,
  76                                         NULL,
  77                                         smb_fname->twrp,
  78                                         smb_fname->flags);
  79         if (cap_smb_fname == NULL) {
  80                 TALLOC_FREE(cappath);
  81                 errno = ENOMEM;
  82                 return -1;
  83         }
  84         return SMB_VFS_NEXT_GET_QUOTA(handle, cap_smb_fname, qtype, id, dq);
  85 }
  86
  87 static struct dirent *
  88 cap_readdir(vfs_handle_struct *handle, struct files_struct *dirfsp, DIR *dirp)
  89 {
  90         struct dirent *result;
  91         struct dirent *newdirent;
  92         char *newname;
  93         size_t newnamelen;
  94         DEBUG(3,("cap: cap_readdir\n"));
  95
  96         result = SMB_VFS_NEXT_READDIR(handle, dirfsp, dirp);
  97         if (!result) {
  98                 return NULL;
  99         }
 100
 101         newname = capdecode(talloc_tos(), result->d_name);
 102         if (!newname) {
 103                 return NULL;
 104         }
 105         DEBUG(3,("cap: cap_readdir: %s\n", newname));
 106         newnamelen = strlen(newname)+1;
 107         newdirent = talloc_size(
 108                 talloc_tos(), sizeof(struct dirent) + newnamelen);
 109         if (!newdirent) {
 110                 return NULL;
 111         }
 112         talloc_set_name_const(newdirent, "struct dirent");
 113         memcpy(newdirent, result, sizeof(struct dirent));
 114         memcpy(&newdirent->d_name, newname, newnamelen);
 115         return newdirent;
 116 }
 117
 118 static int cap_mkdirat(vfs_handle_struct *handle,
 119                 struct files_struct *dirfsp,
 120                 const struct smb_filename *smb_fname,
 121                 mode_t mode)
 122 {
 123         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 124         struct smb_filename *cap_smb_fname = NULL;
 125
 126         if (!cappath) {
 127                 errno = ENOMEM;
 128                 return -1;
 129         }
 130
 131         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 132                                         cappath,
 133                                         NULL,
 134                                         NULL,
 135                                         smb_fname->twrp,
 136                                         smb_fname->flags);
 137         if (cap_smb_fname == NULL) {
 138                 TALLOC_FREE(cappath);
 139                 errno = ENOMEM;
 140                 return -1;
 141         }
 142
 143         return SMB_VFS_NEXT_MKDIRAT(handle,
 144                         dirfsp,
 145                         cap_smb_fname,
 146                         mode);
 147 }
 148
 149 static int cap_openat(vfs_handle_struct *handle,
 150                       const struct files_struct *dirfsp,
 151                       const struct smb_filename *smb_fname_in,
 152                       files_struct *fsp,
 153                       const struct vfs_open_how *how)
 154 {
 155         char *cappath = NULL;
 156         struct smb_filename *smb_fname = NULL;
 157         int ret;
 158         int saved_errno = 0;
 159
 160         cappath = capencode(talloc_tos(), smb_fname_in->base_name);
 161         if (cappath == NULL) {
 162                 errno = ENOMEM;
 163                 return -1;
 164         }
 165
 166         smb_fname = cp_smb_filename(talloc_tos(), smb_fname_in);
 167         if (smb_fname == NULL) {
 168                 TALLOC_FREE(cappath);
 169                 errno = ENOMEM;
 170                 return -1;
 171         }
 172         smb_fname->base_name = cappath;
 173
 174         DBG_DEBUG("cap_open for %s\n", smb_fname_str_dbg(smb_fname));
 175         ret = SMB_VFS_NEXT_OPENAT(handle,
 176                                   dirfsp,
 177                                   smb_fname,
 178                                   fsp,
 179                                   how);
 180         if (ret == -1) {
 181                 saved_errno = errno;
 182         }
 183         TALLOC_FREE(cappath);
 184         TALLOC_FREE(smb_fname);
 185         if (saved_errno != 0) {
 186                 errno = saved_errno;
 187         }
 188         return ret;
 189 }
 190
 191 static int cap_renameat(vfs_handle_struct *handle,
 192                         files_struct *srcfsp,
 193                         const struct smb_filename *smb_fname_src,
 194                         files_struct *dstfsp,
 195                         const struct smb_filename *smb_fname_dst)
 196 {
 197         char *capold = NULL;
 198         char *capnew = NULL;
 199         struct smb_filename *smb_fname_src_tmp = NULL;
 200         struct smb_filename *smb_fname_dst_tmp = NULL;
 201         struct smb_filename *full_fname_src = NULL;
 202         struct smb_filename *full_fname_dst = NULL;
 203         int ret = -1;
 204         int saved_errno = 0;
 205
 206         full_fname_src = full_path_from_dirfsp_atname(talloc_tos(),
 207                                                   srcfsp,
 208                                                   smb_fname_src);
 209         if (full_fname_src == NULL) {
 210                 errno = ENOMEM;
 211                 goto out;
 212         }
 213
 214         full_fname_dst = full_path_from_dirfsp_atname(talloc_tos(),
 215                                                   dstfsp,
 216                                                   smb_fname_dst);
 217         if (full_fname_dst == NULL) {
 218                 errno = ENOMEM;
 219                 goto out;
 220         }
 221
 222         capold = capencode(talloc_tos(), full_fname_src->base_name);
 223         capnew = capencode(talloc_tos(), full_fname_dst->base_name);
 224         if (!capold || !capnew) {
 225                 errno = ENOMEM;
 226                 goto out;
 227         }
 228
 229         /* Setup temporary smb_filename structs. */
 230         smb_fname_src_tmp = cp_smb_filename(talloc_tos(), full_fname_src);
 231         if (smb_fname_src_tmp == NULL) {
 232                 errno = ENOMEM;
 233                 goto out;
 234         }
 235         smb_fname_dst_tmp = cp_smb_filename(talloc_tos(), full_fname_dst);
 236         if (smb_fname_dst_tmp == NULL) {
 237                 errno = ENOMEM;
 238                 goto out;
 239         }
 240
 241         smb_fname_src_tmp->base_name = capold;
 242         smb_fname_dst_tmp->base_name = capnew;
 243
 244         ret = SMB_VFS_NEXT_RENAMEAT(handle,
 245                                 srcfsp->conn->cwd_fsp,
 246                                 smb_fname_src_tmp,
 247                                 dstfsp->conn->cwd_fsp,
 248                                 smb_fname_dst_tmp);
 249
 250  out:
 251
 252         if (ret != 0) {
 253                 saved_errno = errno;
 254         }
 255
 256         TALLOC_FREE(full_fname_src);
 257         TALLOC_FREE(full_fname_dst);
 258         TALLOC_FREE(capold);
 259         TALLOC_FREE(capnew);
 260         TALLOC_FREE(smb_fname_src_tmp);
 261         TALLOC_FREE(smb_fname_dst_tmp);
 262
 263         if (ret != 0) {
 264                 errno = saved_errno;
 265         }
 266
 267         return ret;
 268 }
 269
 270 static int cap_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 271 {
 272         char *cappath;
 273         char *tmp_base_name = NULL;
 274         int ret;
 275
 276         cappath = capencode(talloc_tos(), smb_fname->base_name);
 277
 278         if (!cappath) {
 279                 errno = ENOMEM;
 280                 return -1;
 281         }
 282
 283         tmp_base_name = smb_fname->base_name;
 284         smb_fname->base_name = cappath;
 285
 286         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
 287
 288         smb_fname->base_name = tmp_base_name;
 289         TALLOC_FREE(cappath);
 290
 291         return ret;
 292 }
 293
 294 static int cap_lstat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 295 {
 296         char *cappath;
 297         char *tmp_base_name = NULL;
 298         int ret;
 299
 300         cappath = capencode(talloc_tos(), smb_fname->base_name);
 301
 302         if (!cappath) {
 303                 errno = ENOMEM;
 304                 return -1;
 305         }
 306
 307         tmp_base_name = smb_fname->base_name;
 308         smb_fname->base_name = cappath;
 309
 310         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 311
 312         smb_fname->base_name = tmp_base_name;
 313         TALLOC_FREE(cappath);
 314
 315         return ret;
 316 }
 317
 318 static int cap_unlinkat(vfs_handle_struct *handle,
 319                         struct files_struct *dirfsp,
 320                         const struct smb_filename *smb_fname,
 321                         int flags)
 322 {
 323         struct smb_filename *full_fname = NULL;
 324         struct smb_filename *smb_fname_tmp = NULL;
 325         char *cappath = NULL;
 326         int ret;
 327
 328         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 329                                                   dirfsp,
 330                                                   smb_fname);
 331         if (full_fname == NULL) {
 332                 return -1;
 333         }
 334
 335         cappath = capencode(talloc_tos(), full_fname->base_name);
 336         if (!cappath) {
 337                 TALLOC_FREE(full_fname);
 338                 errno = ENOMEM;
 339                 return -1;
 340         }
 341
 342         /* Setup temporary smb_filename structs. */
 343         smb_fname_tmp = cp_smb_filename(talloc_tos(), full_fname);
 344         TALLOC_FREE(full_fname);
 345         if (smb_fname_tmp == NULL) {
 346                 errno = ENOMEM;
 347                 return -1;
 348         }
 349
 350         smb_fname_tmp->base_name = cappath;
 351
 352         ret = SMB_VFS_NEXT_UNLINKAT(handle,
 353                         dirfsp->conn->cwd_fsp,
 354                         smb_fname_tmp,
 355                         flags);
 356
 357         TALLOC_FREE(smb_fname_tmp);
 358         return ret;
 359 }
 360
 361 static int cap_lchown(vfs_handle_struct *handle,
 362                         const struct smb_filename *smb_fname,
 363                         uid_t uid,
 364                         gid_t gid)
 365 {
 366         struct smb_filename *cap_smb_fname = NULL;
 367         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 368         int ret;
 369         int saved_errno;
 370
 371         if (!cappath) {
 372                 errno = ENOMEM;
 373                 return -1;
 374         }
 375
 376         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 377                                         cappath,
 378                                         NULL,
 379                                         NULL,
 380                                         smb_fname->twrp,
 381                                         smb_fname->flags);
 382         if (cap_smb_fname == NULL) {
 383                 TALLOC_FREE(cappath);
 384                 errno = ENOMEM;
 385                 return -1;
 386         }
 387
 388         ret = SMB_VFS_NEXT_LCHOWN(handle, cap_smb_fname, uid, gid);
 389         saved_errno = errno;
 390         TALLOC_FREE(cappath);
 391         TALLOC_FREE(cap_smb_fname);
 392         errno = saved_errno;
 393         return ret;
 394 }
 395
 396 static int cap_chdir(vfs_handle_struct *handle,
 397                         const struct smb_filename *smb_fname)
 398 {
 399         struct smb_filename *cap_smb_fname = NULL;
 400         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 401         int ret;
 402         int saved_errno = 0;
 403
 404         if (!cappath) {
 405                 errno = ENOMEM;
 406                 return -1;
 407         }
 408         DEBUG(3,("cap: cap_chdir for %s\n", smb_fname->base_name));
 409
 410         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 411                                         cappath,
 412                                         NULL,
 413                                         NULL,
 414                                         smb_fname->twrp,
 415                                         smb_fname->flags);
 416         if (cap_smb_fname == NULL) {
 417                 TALLOC_FREE(cappath);
 418                 errno = ENOMEM;
 419                 return -1;
 420         }
 421         ret = SMB_VFS_NEXT_CHDIR(handle, cap_smb_fname);
 422         if (ret == -1) {
 423                 saved_errno = errno;
 424         }
 425         TALLOC_FREE(cappath);
 426         TALLOC_FREE(cap_smb_fname);
 427         if (saved_errno != 0) {
 428                 errno = saved_errno;
 429         }
 430         return ret;
 431 }
 432
 433 static int cap_symlinkat(vfs_handle_struct *handle,
 434                         const struct smb_filename *link_contents,
 435                         struct files_struct *dirfsp,
 436                         const struct smb_filename *new_smb_fname)
 437 {
 438         struct smb_filename *full_fname = NULL;
 439         char *capold = capencode(talloc_tos(), link_contents->base_name);
 440         char *capnew = NULL;
 441         struct smb_filename *new_link_target = NULL;
 442         struct smb_filename *new_cap_smb_fname = NULL;
 443         int saved_errno = 0;
 444         int ret;
 445
 446         if (capold == NULL) {
 447                 errno = ENOMEM;
 448                 return -1;
 449         }
 450
 451         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 452                                                 dirfsp,
 453                                                 new_smb_fname);
 454         if (full_fname == NULL) {
 455                 return -1;
 456         }
 457
 458         capnew = capencode(talloc_tos(), full_fname->base_name);
 459         if (!capnew) {
 460                 TALLOC_FREE(full_fname);
 461                 errno = ENOMEM;
 462                 return -1;
 463         }
 464
 465         new_link_target = synthetic_smb_fname(talloc_tos(),
 466                                               capold,
 467                                               NULL,
 468                                               NULL,
 469                                               new_smb_fname->twrp,
 470                                               new_smb_fname->flags);
 471         if (new_link_target == NULL) {
 472                 TALLOC_FREE(full_fname);
 473                 TALLOC_FREE(capold);
 474                 TALLOC_FREE(capnew);
 475                 errno = ENOMEM;
 476                 return -1;
 477         }
 478
 479         new_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 480                                         capnew,
 481                                         NULL,
 482                                         NULL,
 483                                         new_smb_fname->twrp,
 484                                         new_smb_fname->flags);
 485         if (new_cap_smb_fname == NULL) {
 486                 TALLOC_FREE(full_fname);
 487                 TALLOC_FREE(capold);
 488                 TALLOC_FREE(capnew);
 489                 TALLOC_FREE(new_link_target);
 490                 errno = ENOMEM;
 491                 return -1;
 492         }
 493         ret = SMB_VFS_NEXT_SYMLINKAT(handle,
 494                         new_link_target,
 495                         handle->conn->cwd_fsp,
 496                         new_cap_smb_fname);
 497         if (ret == -1) {
 498                 saved_errno = errno;
 499         }
 500         TALLOC_FREE(full_fname);
 501         TALLOC_FREE(capold);
 502         TALLOC_FREE(capnew);
 503         TALLOC_FREE(new_link_target);
 504         TALLOC_FREE(new_cap_smb_fname);
 505         if (saved_errno != 0) {
 506                 errno = saved_errno;
 507         }
 508         return ret;
 509 }
 510
 511 static int cap_readlinkat(vfs_handle_struct *handle,
 512                         const struct files_struct *dirfsp,
 513                         const struct smb_filename *smb_fname,
 514                         char *buf,
 515                         size_t bufsiz)
 516 {
 517         struct smb_filename *full_fname = NULL;
 518         struct smb_filename *cap_smb_fname = NULL;
 519         char *cappath = NULL;
 520         int saved_errno = 0;
 521         int ret;
 522
 523         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 524                                                 dirfsp,
 525                                                 smb_fname);
 526         if (full_fname == NULL) {
 527                 return -1;
 528         }
 529
 530         cappath = capencode(talloc_tos(), full_fname->base_name);
 531         if (cappath == NULL) {
 532                 TALLOC_FREE(full_fname);
 533                 errno = ENOMEM;
 534                 return -1;
 535         }
 536         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 537                                         cappath,
 538                                         NULL,
 539                                         NULL,
 540                                         smb_fname->twrp,
 541                                         smb_fname->flags);
 542         if (cap_smb_fname == NULL) {
 543                 TALLOC_FREE(full_fname);
 544                 TALLOC_FREE(cappath);
 545                 errno = ENOMEM;
 546                 return -1;
 547         }
 548         ret = SMB_VFS_NEXT_READLINKAT(handle,
 549                         handle->conn->cwd_fsp,
 550                         cap_smb_fname,
 551                         buf,
 552                         bufsiz);
 553         if (ret == -1) {
 554                 saved_errno = errno;
 555         }
 556         TALLOC_FREE(full_fname);
 557         TALLOC_FREE(cappath);
 558         TALLOC_FREE(cap_smb_fname);
 559         if (saved_errno != 0) {
 560                 errno = saved_errno;
 561         }
 562         return ret;
 563 }
 564
 565 static int cap_linkat(vfs_handle_struct *handle,
 566                 files_struct *srcfsp,
 567                 const struct smb_filename *old_smb_fname,
 568                 files_struct *dstfsp,
 569                 const struct smb_filename *new_smb_fname,
 570                 int flags)
 571 {
 572         struct smb_filename *old_full_fname = NULL;
 573         struct smb_filename *new_full_fname = NULL;
 574         char *capold = NULL;
 575         char *capnew = NULL;
 576         struct smb_filename *old_cap_smb_fname = NULL;
 577         struct smb_filename *new_cap_smb_fname = NULL;
 578         int saved_errno = 0;
 579         int ret;
 580
 581         /* Process 'old' name. */
 582         old_full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 583                                                 srcfsp,
 584                                                 old_smb_fname);
 585         if (old_full_fname == NULL) {
 586                 goto nomem_out;
 587         }
 588         capold = capencode(talloc_tos(), old_full_fname->base_name);
 589         if (capold == NULL) {
 590                 goto nomem_out;
 591         }
 592         TALLOC_FREE(old_full_fname);
 593         old_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 594                                         capold,
 595                                         NULL,
 596                                         NULL,
 597                                         old_smb_fname->twrp,
 598                                         old_smb_fname->flags);
 599         if (old_cap_smb_fname == NULL) {
 600                 goto nomem_out;
 601         }
 602
 603         /* Process 'new' name. */
 604         new_full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 605                                                 dstfsp,
 606                                                 new_smb_fname);
 607         if (new_full_fname == NULL) {
 608                 goto nomem_out;
 609         }
 610         capnew = capencode(talloc_tos(), new_full_fname->base_name);
 611         if (capnew == NULL) {
 612                 goto nomem_out;
 613         }
 614         TALLOC_FREE(new_full_fname);
 615         new_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 616                                         capnew,
 617                                         NULL,
 618                                         NULL,
 619                                         new_smb_fname->twrp,
 620                                         new_smb_fname->flags);
 621         if (new_cap_smb_fname == NULL) {
 622                 goto nomem_out;
 623         }
 624
 625         ret = SMB_VFS_NEXT_LINKAT(handle,
 626                         handle->conn->cwd_fsp,
 627                         old_cap_smb_fname,
 628                         handle->conn->cwd_fsp,
 629                         new_cap_smb_fname,
 630                         flags);
 631         if (ret == -1) {
 632                 saved_errno = errno;
 633         }
 634         TALLOC_FREE(old_full_fname);
 635         TALLOC_FREE(old_full_fname);
 636         TALLOC_FREE(capold);
 637         TALLOC_FREE(capnew);
 638         TALLOC_FREE(old_cap_smb_fname);
 639         TALLOC_FREE(new_cap_smb_fname);
 640         if (saved_errno != 0) {
 641                 errno = saved_errno;
 642         }
 643         return ret;
 644
 645   nomem_out:
 646
 647         TALLOC_FREE(old_full_fname);
 648         TALLOC_FREE(old_full_fname);
 649         TALLOC_FREE(capold);
 650         TALLOC_FREE(capnew);
 651         TALLOC_FREE(old_cap_smb_fname);
 652         TALLOC_FREE(new_cap_smb_fname);
 653         errno = ENOMEM;
 654         return -1;
 655 }
 656
 657 static int cap_mknodat(vfs_handle_struct *handle,
 658                 files_struct *dirfsp,
 659                 const struct smb_filename *smb_fname,
 660                 mode_t mode,
 661                 SMB_DEV_T dev)
 662 {
 663         struct smb_filename *full_fname = NULL;
 664         struct smb_filename *cap_smb_fname = NULL;
 665         char *cappath = NULL;
 666         int ret;
 667         int saved_errno = 0;
 668
 669         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 670                                                 dirfsp,
 671                                                 smb_fname);
 672         if (full_fname == NULL) {
 673                 return -1;
 674         }
 675
 676         cappath = capencode(talloc_tos(), full_fname->base_name);
 677         if (!cappath) {
 678                 TALLOC_FREE(full_fname);
 679                 errno = ENOMEM;
 680                 return -1;
 681         }
 682         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 683                                         cappath,
 684                                         NULL,
 685                                         NULL,
 686                                         smb_fname->twrp,
 687                                         smb_fname->flags);
 688         if (cap_smb_fname == NULL) {
 689                 TALLOC_FREE(full_fname);
 690                 TALLOC_FREE(cappath);
 691                 errno = ENOMEM;
 692                 return -1;
 693         }
 694         ret = SMB_VFS_NEXT_MKNODAT(handle,
 695                         handle->conn->cwd_fsp,
 696                         cap_smb_fname,
 697                         mode,
 698                         dev);
 699         if (ret == -1) {
 700                 saved_errno = errno;
 701         }
 702         TALLOC_FREE(full_fname);
 703         TALLOC_FREE(cappath);
 704         TALLOC_FREE(cap_smb_fname);
 705         if (saved_errno != 0) {
 706                 errno = saved_errno;
 707         }
 708         return ret;
 709 }
 710
 711 static struct smb_filename *cap_realpath(vfs_handle_struct *handle,
 712                         TALLOC_CTX *ctx,
 713                         const struct smb_filename *smb_fname)
 714 {
 715         /* monyo need capencode'ed and capdecode'ed? */
 716         struct smb_filename *cap_smb_fname = NULL;
 717         struct smb_filename *return_fname = NULL;
 718         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 719         int saved_errno = 0;
 720
 721         if (!cappath) {
 722                 errno = ENOMEM;
 723                 return NULL;
 724         }
 725         cap_smb_fname = synthetic_smb_fname(ctx,
 726                                         cappath,
 727                                         NULL,
 728                                         NULL,
 729                                         smb_fname->twrp,
 730                                         smb_fname->flags);
 731         if (cap_smb_fname == NULL) {
 732                 TALLOC_FREE(cappath);
 733                 errno = ENOMEM;
 734                 return NULL;
 735         }
 736         return_fname = SMB_VFS_NEXT_REALPATH(handle, ctx, cap_smb_fname);
 737         if (return_fname == NULL) {
 738                 saved_errno = errno;
 739         }
 740         TALLOC_FREE(cappath);
 741         TALLOC_FREE(cap_smb_fname);
 742         if (saved_errno != 0) {
 743                 errno = saved_errno;
 744         }
 745         return return_fname;
 746 }
 747
 748 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
 749 {
 750         char *cappath = capencode(talloc_tos(), path);
 751
 752         if (!cappath) {
 753                 errno = ENOMEM;
 754                 return -1;
 755         }
 756         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
 757 }
 758
 759 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
 760 {
 761         char *cappath = capencode(talloc_tos(), path);
 762
 763         if (!cappath) {
 764                 errno = ENOMEM;
 765                 return -1;
 766         }
 767         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
 768 }
 769
 770 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
 771 {
 772         char *cappath = capencode(talloc_tos(), path);
 773
 774         if (!cappath) {
 775                 errno = ENOMEM;
 776                 return -1;
 777         }
 778         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
 779 }
 780
 781 static NTSTATUS cap_create_dfs_pathat(vfs_handle_struct *handle,
 782                         files_struct *dirfsp,
 783                         const struct smb_filename *smb_fname,
 784                         const struct referral *reflist,
 785                         size_t referral_count)
 786 {
 787         char *cappath = capencode(talloc_tos(), smb_fname->base_name);
 788         struct smb_filename *cap_smb_fname = NULL;
 789         NTSTATUS status;
 790
 791         if (cappath == NULL) {
 792                 return NT_STATUS_NO_MEMORY;
 793         }
 794         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 795                                         cappath,
 796                                         NULL,
 797                                         NULL,
 798                                         smb_fname->twrp,
 799                                         smb_fname->flags);
 800         if (cap_smb_fname == NULL) {
 801                 TALLOC_FREE(cappath);
 802                 return NT_STATUS_NO_MEMORY;
 803         }
 804         status = SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
 805                         dirfsp,
 806                         cap_smb_fname,
 807                         reflist,
 808                         referral_count);
 809         TALLOC_FREE(cappath);
 810         TALLOC_FREE(cap_smb_fname);
 811         return status;
 812 }
 813
 814 static NTSTATUS cap_read_dfs_pathat(struct vfs_handle_struct *handle,
 815                         TALLOC_CTX *mem_ctx,
 816                         struct files_struct *dirfsp,
 817                         struct smb_filename *smb_fname,
 818                         struct referral **ppreflist,
 819                         size_t *preferral_count)
 820 {
 821         struct smb_filename *full_fname = NULL;
 822         struct smb_filename *cap_smb_fname = NULL;
 823         char *cappath = NULL;
 824         NTSTATUS status;
 825
 826         full_fname = full_path_from_dirfsp_atname(talloc_tos(),
 827                                                 dirfsp,
 828                                                 smb_fname);
 829         if (full_fname == NULL) {
 830                 return NT_STATUS_NO_MEMORY;
 831         }
 832         cappath = capencode(talloc_tos(), full_fname->base_name);
 833         if (cappath == NULL) {
 834                 TALLOC_FREE(full_fname);
 835                 return NT_STATUS_NO_MEMORY;
 836         }
 837         cap_smb_fname = synthetic_smb_fname(talloc_tos(),
 838                                 cappath,
 839                                 NULL,
 840                                 NULL,
 841                                 smb_fname->twrp,
 842                                 smb_fname->flags);
 843         if (cap_smb_fname == NULL) {
 844                 TALLOC_FREE(full_fname);
 845                 TALLOC_FREE(cappath);
 846                 return NT_STATUS_NO_MEMORY;
 847         }
 848
 849         status = SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
 850                         mem_ctx,
 851                         handle->conn->cwd_fsp,
 852                         cap_smb_fname,
 853                         ppreflist,
 854                         preferral_count);
 855
 856         if (NT_STATUS_IS_OK(status)) {
 857                 /* Return any stat(2) info. */
 858                 smb_fname->st = cap_smb_fname->st;
 859         }
 860
 861         TALLOC_FREE(full_fname);
 862         TALLOC_FREE(cappath);
 863         TALLOC_FREE(cap_smb_fname);
 864         return status;
 865 }
 866
 867 static struct vfs_fn_pointers vfs_cap_fns = {
 868         .disk_free_fn = cap_disk_free,
 869         .get_quota_fn = cap_get_quota,
 870         .readdir_fn = cap_readdir,
 871         .mkdirat_fn = cap_mkdirat,
 872         .openat_fn = cap_openat,
 873         .renameat_fn = cap_renameat,
 874         .stat_fn = cap_stat,
 875         .lstat_fn = cap_lstat,
 876         .unlinkat_fn = cap_unlinkat,
 877         .lchown_fn = cap_lchown,
 878         .chdir_fn = cap_chdir,
 879         .symlinkat_fn = cap_symlinkat,
 880         .readlinkat_fn = cap_readlinkat,
 881         .linkat_fn = cap_linkat,
 882         .mknodat_fn = cap_mknodat,
 883         .realpath_fn = cap_realpath,
 884         .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
 885         .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
 886         .fgetxattr_fn = cap_fgetxattr,
 887         .fremovexattr_fn = cap_fremovexattr,
 888         .fsetxattr_fn = cap_fsetxattr,
 889         .create_dfs_pathat_fn = cap_create_dfs_pathat,
 890         .read_dfs_pathat_fn = cap_read_dfs_pathat
 891 };
 892
 893 static_decl_vfs;
 894 NTSTATUS vfs_cap_init(TALLOC_CTX *ctx)
 895 {
 896         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap",
 897                                 &vfs_cap_fns);
 898 }
 899
 900 /* For CAP functions */
 901 #define hex_tag ':'
 902 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 903 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 904 #define is_hex(s)               ((s)[0] == hex_tag)
 905
 906 static unsigned char hex2bin_table[256] = {
 907 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 908 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 909 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 910 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 911 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 912 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 913 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 914 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 915 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 916 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 917 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 918 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 919 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 920 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 921 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 922 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 923 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 924 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 925 };
 926 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 927
 928 /*******************************************************************
 929   original code -> ":xx"  - CAP format
 930 ********************************************************************/
 931
 932 static char *capencode(TALLOC_CTX *ctx, const char *from)
 933 {
 934         char *out = NULL;
 935         const char *p1;
 936         char *to = NULL;
 937         size_t len = 0;
 938
 939         for (p1 = from; *p1; p1++) {
 940                 if ((unsigned char)*p1 >= 0x80) {
 941                         len += 3;
 942                 } else {
 943                         len++;
 944                 }
 945         }
 946         len++;
 947
 948         to = talloc_array(ctx, char, len);
 949         if (!to) {
 950                 return NULL;
 951         }
 952
 953         for (out = to; *from;) {
 954                 /* buffer husoku error */
 955                 if ((unsigned char)*from >= 0x80) {
 956                         *out++ = hex_tag;
 957                         *out++ = bin2hex (((*from)>>4)&0x0f);
 958                         *out++ = bin2hex ((*from)&0x0f);
 959                         from++;
 960                 } else {
 961                         *out++ = *from++;
 962                 }
 963         }
 964         *out = '\0';
 965         return to;
 966 }
 967
 968 /*******************************************************************
 969   CAP -> original code
 970 ********************************************************************/
 971 /* ":xx" -> a byte */
 972
 973 static char *capdecode(TALLOC_CTX *ctx, const char *from)
 974 {
 975         const char *p1;
 976         char *out = NULL;
 977         char *to = NULL;
 978         size_t len = 0;
 979
 980         for (p1 = from; *p1; len++) {
 981                 if (is_hex(p1)) {
 982                         p1 += 3;
 983                 } else {
 984                         p1++;
 985                 }
 986         }
 987         len++;
 988
 989         to = talloc_array(ctx, char, len);
 990         if (!to) {
 991                 return NULL;
 992         }
 993
 994         for (out = to; *from;) {
 995                 if (is_hex(from)) {
 996                         *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
 997                         from += 3;
 998                 } else {
 999                         *out++ = *from++;
1000                 }
1001         }
1002         *out = '\0';
1003         return to;
1004 }