source3/modules/vfs_xattr_tdb.c

   1 /*
   2  * Store posix-level xattrs in a tdb
   3  *
   4  * Copyright (C) Volker Lendecke, 2007
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "librpc/gen_ndr/xattr.h"
  22 #include "librpc/gen_ndr/ndr_xattr.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_VFS
  26
  27 /*
  28  * unmarshall tdb_xattrs
  29  */
  30
  31 static NTSTATUS xattr_tdb_pull_attrs(TALLOC_CTX *mem_ctx,
  32                                      const TDB_DATA *data,
  33                                      struct tdb_xattrs **presult)
  34 {
  35         DATA_BLOB blob;
  36         enum ndr_err_code ndr_err;
  37         struct tdb_xattrs *result;
  38
  39         if (!(result = TALLOC_ZERO_P(mem_ctx, struct tdb_xattrs))) {
  40                 return NT_STATUS_NO_MEMORY;
  41         }
  42
  43         if (data->dsize == 0) {
  44                 *presult = result;
  45                 return NT_STATUS_OK;
  46         }
  47
  48         blob = data_blob_const(data->dptr, data->dsize);
  49
  50         ndr_err = ndr_pull_struct_blob(&blob, result, result,
  51                 (ndr_pull_flags_fn_t)ndr_pull_tdb_xattrs);
  52
  53         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  54                 DEBUG(0, ("ndr_pull_tdb_xattrs failed: %s\n",
  55                           ndr_errstr(ndr_err)));
  56                 TALLOC_FREE(result);
  57                 return ndr_map_error2ntstatus(ndr_err);;
  58         }
  59
  60         *presult = result;
  61         return NT_STATUS_OK;
  62 }
  63
  64 /*
  65  * marshall tdb_xattrs
  66  */
  67
  68 static NTSTATUS xattr_tdb_push_attrs(TALLOC_CTX *mem_ctx,
  69                                      const struct tdb_xattrs *attribs,
  70                                      TDB_DATA *data)
  71 {
  72         DATA_BLOB blob;
  73         enum ndr_err_code ndr_err;
  74
  75         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, attribs,
  76                 (ndr_push_flags_fn_t)ndr_push_tdb_xattrs);
  77
  78         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  79                 DEBUG(0, ("ndr_push_tdb_xattrs failed: %s\n",
  80                           ndr_errstr(ndr_err)));
  81                 return ndr_map_error2ntstatus(ndr_err);;
  82         }
  83
  84         *data = make_tdb_data(blob.data, blob.length);
  85         return NT_STATUS_OK;
  86 }
  87
  88 /*
  89  * Load tdb_xattrs for a file from the tdb
  90  */
  91
  92 static NTSTATUS xattr_tdb_load_attrs(TALLOC_CTX *mem_ctx,
  93                                      struct db_context *db_ctx,
  94                                      const struct file_id *id,
  95                                      struct tdb_xattrs **presult)
  96 {
  97         uint8 id_buf[16];
  98         NTSTATUS status;
  99         TDB_DATA data;
 100
 101         /* For backwards compatibility only store the dev/inode. */
 102         push_file_id_16((char *)id_buf, id);
 103
 104         if (db_ctx->fetch(db_ctx, mem_ctx,
 105                           make_tdb_data(id_buf, sizeof(id_buf)),
 106                           &data) == -1) {
 107                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 108         }
 109
 110         status = xattr_tdb_pull_attrs(mem_ctx, &data, presult);
 111         TALLOC_FREE(data.dptr);
 112         return status;
 113 }
 114
 115 /*
 116  * fetch_lock the tdb_ea record for a file
 117  */
 118
 119 static struct db_record *xattr_tdb_lock_attrs(TALLOC_CTX *mem_ctx,
 120                                               struct db_context *db_ctx,
 121                                               const struct file_id *id)
 122 {
 123         uint8 id_buf[16];
 124
 125         /* For backwards compatibility only store the dev/inode. */
 126         push_file_id_16((char *)id_buf, id);
 127         return db_ctx->fetch_locked(db_ctx, mem_ctx,
 128                                     make_tdb_data(id_buf, sizeof(id_buf)));
 129 }
 130
 131 /*
 132  * Save tdb_xattrs to a previously fetch_locked record
 133  */
 134
 135 static NTSTATUS xattr_tdb_save_attrs(struct db_record *rec,
 136                                      const struct tdb_xattrs *attribs)
 137 {
 138         TDB_DATA data = tdb_null;
 139         NTSTATUS status;
 140
 141         status = xattr_tdb_push_attrs(talloc_tos(), attribs, &data);
 142
 143         if (!NT_STATUS_IS_OK(status)) {
 144                 DEBUG(0, ("xattr_tdb_push_attrs failed: %s\n",
 145                           nt_errstr(status)));
 146                 return status;
 147         }
 148
 149         status = rec->store(rec, data, 0);
 150
 151         TALLOC_FREE(data.dptr);
 152
 153         return status;
 154 }
 155
 156 /*
 157  * Worker routine for getxattr and fgetxattr
 158  */
 159
 160 static ssize_t xattr_tdb_getattr(struct db_context *db_ctx,
 161                                  const struct file_id *id,
 162                                  const char *name, void *value, size_t size)
 163 {
 164         struct tdb_xattrs *attribs;
 165         uint32_t i;
 166         ssize_t result = -1;
 167         NTSTATUS status;
 168
 169         DEBUG(10, ("xattr_tdb_getattr called for file %s, name %s\n",
 170                    file_id_string_tos(id), name));
 171
 172         status = xattr_tdb_load_attrs(talloc_tos(), db_ctx, id, &attribs);
 173
 174         if (!NT_STATUS_IS_OK(status)) {
 175                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 176                            nt_errstr(status)));
 177                 errno = EINVAL;
 178                 return -1;
 179         }
 180
 181         for (i=0; i<attribs->num_eas; i++) {
 182                 if (strcmp(attribs->eas[i].name, name) == 0) {
 183                         break;
 184                 }
 185         }
 186
 187         if (i == attribs->num_eas) {
 188                 errno = ENOATTR;
 189                 goto fail;
 190         }
 191
 192         if (attribs->eas[i].value.length > size) {
 193                 errno = ERANGE;
 194                 goto fail;
 195         }
 196
 197         memcpy(value, attribs->eas[i].value.data,
 198                attribs->eas[i].value.length);
 199         result = attribs->eas[i].value.length;
 200
 201  fail:
 202         TALLOC_FREE(attribs);
 203         return result;
 204 }
 205
 206 static ssize_t xattr_tdb_getxattr(struct vfs_handle_struct *handle,
 207                                   const char *path, const char *name,
 208                                   void *value, size_t size)
 209 {
 210         SMB_STRUCT_STAT sbuf;
 211         struct file_id id;
 212         struct db_context *db;
 213
 214         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 215
 216         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 217                 return -1;
 218         }
 219
 220         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 221
 222         return xattr_tdb_getattr(db, &id, name, value, size);
 223 }
 224
 225 static ssize_t xattr_tdb_fgetxattr(struct vfs_handle_struct *handle,
 226                                    struct files_struct *fsp,
 227                                    const char *name, void *value, size_t size)
 228 {
 229         SMB_STRUCT_STAT sbuf;
 230         struct file_id id;
 231         struct db_context *db;
 232
 233         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 234
 235         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 236                 return -1;
 237         }
 238
 239         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 240
 241         return xattr_tdb_getattr(db, &id, name, value, size);
 242 }
 243
 244 /*
 245  * Worker routine for setxattr and fsetxattr
 246  */
 247
 248 static int xattr_tdb_setattr(struct db_context *db_ctx,
 249                              const struct file_id *id, const char *name,
 250                              const void *value, size_t size, int flags)
 251 {
 252         NTSTATUS status;
 253         struct db_record *rec;
 254         struct tdb_xattrs *attribs;
 255         uint32_t i;
 256
 257         DEBUG(10, ("xattr_tdb_setattr called for file %s, name %s\n",
 258                    file_id_string_tos(id), name));
 259
 260         rec = xattr_tdb_lock_attrs(talloc_tos(), db_ctx, id);
 261
 262         if (rec == NULL) {
 263                 DEBUG(0, ("xattr_tdb_lock_attrs failed\n"));
 264                 errno = EINVAL;
 265                 return -1;
 266         }
 267
 268         status = xattr_tdb_pull_attrs(rec, &rec->value, &attribs);
 269
 270         if (!NT_STATUS_IS_OK(status)) {
 271                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 272                            nt_errstr(status)));
 273                 TALLOC_FREE(rec);
 274                 return -1;
 275         }
 276
 277         for (i=0; i<attribs->num_eas; i++) {
 278                 if (strcmp(attribs->eas[i].name, name) == 0) {
 279                         if (flags & XATTR_CREATE) {
 280                                 TALLOC_FREE(rec);
 281                                 errno = EEXIST;
 282                                 return -1;
 283                         }
 284                         break;
 285                 }
 286         }
 287
 288         if (i == attribs->num_eas) {
 289                 struct xattr_EA *tmp;
 290
 291                 if (flags & XATTR_REPLACE) {
 292                         TALLOC_FREE(rec);
 293                         errno = ENOATTR;
 294                         return -1;
 295                 }
 296
 297                 tmp = TALLOC_REALLOC_ARRAY(
 298                         attribs, attribs->eas, struct xattr_EA,
 299                         attribs->num_eas+ 1);
 300
 301                 if (tmp == NULL) {
 302                         DEBUG(0, ("TALLOC_REALLOC_ARRAY failed\n"));
 303                         TALLOC_FREE(rec);
 304                         errno = ENOMEM;
 305                         return -1;
 306                 }
 307
 308                 attribs->eas = tmp;
 309                 attribs->num_eas += 1;
 310         }
 311
 312         attribs->eas[i].name = name;
 313         attribs->eas[i].value.data = CONST_DISCARD(uint8 *, value);
 314         attribs->eas[i].value.length = size;
 315
 316         status = xattr_tdb_save_attrs(rec, attribs);
 317
 318         TALLOC_FREE(rec);
 319
 320         if (!NT_STATUS_IS_OK(status)) {
 321                 DEBUG(1, ("save failed: %s\n", nt_errstr(status)));
 322                 return -1;
 323         }
 324
 325         return 0;
 326 }
 327
 328 static int xattr_tdb_setxattr(struct vfs_handle_struct *handle,
 329                               const char *path, const char *name,
 330                               const void *value, size_t size, int flags)
 331 {
 332         SMB_STRUCT_STAT sbuf;
 333         struct file_id id;
 334         struct db_context *db;
 335
 336         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 337
 338         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 339                 return -1;
 340         }
 341
 342         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 343
 344         return xattr_tdb_setattr(db, &id, name, value, size, flags);
 345 }
 346
 347 static int xattr_tdb_fsetxattr(struct vfs_handle_struct *handle,
 348                                struct files_struct *fsp,
 349                                const char *name, const void *value,
 350                                size_t size, int flags)
 351 {
 352         SMB_STRUCT_STAT sbuf;
 353         struct file_id id;
 354         struct db_context *db;
 355
 356         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 357
 358         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 359                 return -1;
 360         }
 361
 362         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 363
 364         return xattr_tdb_setattr(db, &id, name, value, size, flags);
 365 }
 366
 367 /*
 368  * Worker routine for listxattr and flistxattr
 369  */
 370
 371 static ssize_t xattr_tdb_listattr(struct db_context *db_ctx,
 372                                   const struct file_id *id, char *list,
 373                                   size_t size)
 374 {
 375         NTSTATUS status;
 376         struct tdb_xattrs *attribs;
 377         uint32_t i;
 378         size_t len = 0;
 379
 380         status = xattr_tdb_load_attrs(talloc_tos(), db_ctx, id, &attribs);
 381
 382         if (!NT_STATUS_IS_OK(status)) {
 383                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 384                            nt_errstr(status)));
 385                 errno = EINVAL;
 386                 return -1;
 387         }
 388
 389         DEBUG(10, ("xattr_tdb_listattr: Found %d xattrs\n",
 390                    attribs->num_eas));
 391
 392         for (i=0; i<attribs->num_eas; i++) {
 393                 size_t tmp;
 394
 395                 DEBUG(10, ("xattr_tdb_listattr: xattrs[i].name: %s\n",
 396                            attribs->eas[i].name));
 397
 398                 tmp = strlen(attribs->eas[i].name);
 399
 400                 /*
 401                  * Try to protect against overflow
 402                  */
 403
 404                 if (len + (tmp+1) < len) {
 405                         TALLOC_FREE(attribs);
 406                         errno = EINVAL;
 407                         return -1;
 408                 }
 409
 410                 /*
 411                  * Take care of the terminating NULL
 412                  */
 413                 len += (tmp + 1);
 414         }
 415
 416         if (len > size) {
 417                 TALLOC_FREE(attribs);
 418                 errno = ERANGE;
 419                 return -1;
 420         }
 421
 422         len = 0;
 423
 424         for (i=0; i<attribs->num_eas; i++) {
 425                 strlcpy(list+len, attribs->eas[i].name,
 426                         size-len);
 427                 len += (strlen(attribs->eas[i].name) + 1);
 428         }
 429
 430         TALLOC_FREE(attribs);
 431         return len;
 432 }
 433
 434 static ssize_t xattr_tdb_listxattr(struct vfs_handle_struct *handle,
 435                                    const char *path, char *list, size_t size)
 436 {
 437         SMB_STRUCT_STAT sbuf;
 438         struct file_id id;
 439         struct db_context *db;
 440
 441         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 442
 443         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 444                 return -1;
 445         }
 446
 447         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 448
 449         return xattr_tdb_listattr(db, &id, list, size);
 450 }
 451
 452 static ssize_t xattr_tdb_flistxattr(struct vfs_handle_struct *handle,
 453                                     struct files_struct *fsp, char *list,
 454                                     size_t size)
 455 {
 456         SMB_STRUCT_STAT sbuf;
 457         struct file_id id;
 458         struct db_context *db;
 459
 460         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 461
 462         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 463                 return -1;
 464         }
 465
 466         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 467
 468         return xattr_tdb_listattr(db, &id, list, size);
 469 }
 470
 471 /*
 472  * Worker routine for removexattr and fremovexattr
 473  */
 474
 475 static int xattr_tdb_removeattr(struct db_context *db_ctx,
 476                                 const struct file_id *id, const char *name)
 477 {
 478         NTSTATUS status;
 479         struct db_record *rec;
 480         struct tdb_xattrs *attribs;
 481         uint32_t i;
 482
 483         rec = xattr_tdb_lock_attrs(talloc_tos(), db_ctx, id);
 484
 485         if (rec == NULL) {
 486                 DEBUG(0, ("xattr_tdb_lock_attrs failed\n"));
 487                 errno = EINVAL;
 488                 return -1;
 489         }
 490
 491         status = xattr_tdb_pull_attrs(rec, &rec->value, &attribs);
 492
 493         if (!NT_STATUS_IS_OK(status)) {
 494                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 495                            nt_errstr(status)));
 496                 TALLOC_FREE(rec);
 497                 return -1;
 498         }
 499
 500         for (i=0; i<attribs->num_eas; i++) {
 501                 if (strcmp(attribs->eas[i].name, name) == 0) {
 502                         break;
 503                 }
 504         }
 505
 506         if (i == attribs->num_eas) {
 507                 TALLOC_FREE(rec);
 508                 errno = ENOATTR;
 509                 return -1;
 510         }
 511
 512         attribs->eas[i] =
 513                 attribs->eas[attribs->num_eas-1];
 514         attribs->num_eas -= 1;
 515
 516         if (attribs->num_eas == 0) {
 517                 rec->delete_rec(rec);
 518                 TALLOC_FREE(rec);
 519                 return 0;
 520         }
 521
 522         status = xattr_tdb_save_attrs(rec, attribs);
 523
 524         TALLOC_FREE(rec);
 525
 526         if (!NT_STATUS_IS_OK(status)) {
 527                 DEBUG(1, ("save failed: %s\n", nt_errstr(status)));
 528                 return -1;
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int xattr_tdb_removexattr(struct vfs_handle_struct *handle,
 535                                  const char *path, const char *name)
 536 {
 537         SMB_STRUCT_STAT sbuf;
 538         struct file_id id;
 539         struct db_context *db;
 540
 541         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 542
 543         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 544                 return -1;
 545         }
 546
 547         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 548
 549         return xattr_tdb_removeattr(db, &id, name);
 550 }
 551
 552 static int xattr_tdb_fremovexattr(struct vfs_handle_struct *handle,
 553                                   struct files_struct *fsp, const char *name)
 554 {
 555         SMB_STRUCT_STAT sbuf;
 556         struct file_id id;
 557         struct db_context *db;
 558
 559         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 560
 561         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 562                 return -1;
 563         }
 564
 565         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 566
 567         return xattr_tdb_removeattr(db, &id, name);
 568 }
 569
 570 /*
 571  * Open the tdb file upon VFS_CONNECT
 572  */
 573
 574 static bool xattr_tdb_init(int snum, struct db_context **p_db)
 575 {
 576         struct db_context *db;
 577         const char *dbname;
 578         char *def_dbname;
 579
 580         def_dbname = state_path("xattr.tdb");
 581         if (def_dbname == NULL) {
 582                 errno = ENOSYS;
 583                 return false;
 584         }
 585
 586         dbname = lp_parm_const_string(snum, "xattr_tdb", "file", def_dbname);
 587
 588         /* now we know dbname is not NULL */
 589
 590         become_root();
 591         db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
 592         unbecome_root();
 593
 594         if (db == NULL) {
 595 #if defined(ENOTSUP)
 596                 errno = ENOTSUP;
 597 #else
 598                 errno = ENOSYS;
 599 #endif
 600                 TALLOC_FREE(def_dbname);
 601                 return false;
 602         }
 603
 604         *p_db = db;
 605         TALLOC_FREE(def_dbname);
 606         return true;
 607 }
 608
 609 /*
 610  * On unlink we need to delete the tdb record
 611  */
 612 static int xattr_tdb_unlink(vfs_handle_struct *handle,
 613                             const struct smb_filename *smb_fname)
 614 {
 615         struct smb_filename *smb_fname_tmp = NULL;
 616         struct file_id id;
 617         struct db_context *db;
 618         struct db_record *rec;
 619         NTSTATUS status;
 620         int ret = -1;
 621         bool remove_record = false;
 622
 623         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 624
 625         status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
 626         if (!NT_STATUS_IS_OK(status)) {
 627                 errno = map_errno_from_nt_status(status);
 628                 return -1;
 629         }
 630
 631         if (lp_posix_pathnames()) {
 632                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
 633         } else {
 634                 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
 635         }
 636         if (ret == -1) {
 637                 goto out;
 638         }
 639
 640         if (smb_fname_tmp->st.st_ex_nlink == 1) {
 641                 /* Only remove record on last link to file. */
 642                 remove_record = true;
 643         }
 644
 645         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 646
 647         if (ret == -1) {
 648                 goto out;
 649         }
 650
 651         if (!remove_record) {
 652                 goto out;
 653         }
 654
 655         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &smb_fname_tmp->st);
 656
 657         rec = xattr_tdb_lock_attrs(talloc_tos(), db, &id);
 658
 659         /*
 660          * If rec == NULL there's not much we can do about it
 661          */
 662
 663         if (rec != NULL) {
 664                 rec->delete_rec(rec);
 665                 TALLOC_FREE(rec);
 666         }
 667
 668  out:
 669         TALLOC_FREE(smb_fname_tmp);
 670         return ret;
 671 }
 672
 673 /*
 674  * On rmdir we need to delete the tdb record
 675  */
 676 static int xattr_tdb_rmdir(vfs_handle_struct *handle, const char *path)
 677 {
 678         SMB_STRUCT_STAT sbuf;
 679         struct file_id id;
 680         struct db_context *db;
 681         struct db_record *rec;
 682         int ret;
 683
 684         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 685
 686         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 687                 return -1;
 688         }
 689
 690         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 691
 692         if (ret == -1) {
 693                 return -1;
 694         }
 695
 696         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 697
 698         rec = xattr_tdb_lock_attrs(talloc_tos(), db, &id);
 699
 700         /*
 701          * If rec == NULL there's not much we can do about it
 702          */
 703
 704         if (rec != NULL) {
 705                 rec->delete_rec(rec);
 706                 TALLOC_FREE(rec);
 707         }
 708
 709         return 0;
 710 }
 711
 712 /*
 713  * Destructor for the VFS private data
 714  */
 715
 716 static void close_xattr_db(void **data)
 717 {
 718         struct db_context **p_db = (struct db_context **)data;
 719         TALLOC_FREE(*p_db);
 720 }
 721
 722 static int xattr_tdb_connect(vfs_handle_struct *handle, const char *service,
 723                           const char *user)
 724 {
 725         fstring sname;
 726         int res, snum;
 727         struct db_context *db;
 728
 729         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 730         if (res < 0) {
 731                 return res;
 732         }
 733
 734         fstrcpy(sname, service);
 735         snum = find_service(sname);
 736         if (snum == -1) {
 737                 /*
 738                  * Should not happen, but we should not fail just *here*.
 739                  */
 740                 return 0;
 741         }
 742
 743         if (!xattr_tdb_init(snum, &db)) {
 744                 DEBUG(5, ("Could not init xattr tdb\n"));
 745                 lp_do_parameter(snum, "ea support", "False");
 746                 return 0;
 747         }
 748
 749         lp_do_parameter(snum, "ea support", "True");
 750
 751         SMB_VFS_HANDLE_SET_DATA(handle, db, close_xattr_db,
 752                                 struct db_context, return -1);
 753
 754         return 0;
 755 }
 756
 757 static struct vfs_fn_pointers vfs_xattr_tdb_fns = {
 758         .getxattr = xattr_tdb_getxattr,
 759         .fgetxattr = xattr_tdb_fgetxattr,
 760         .setxattr = xattr_tdb_setxattr,
 761         .fsetxattr = xattr_tdb_fsetxattr,
 762         .listxattr = xattr_tdb_listxattr,
 763         .flistxattr = xattr_tdb_flistxattr,
 764         .removexattr = xattr_tdb_removexattr,
 765         .fremovexattr = xattr_tdb_fremovexattr,
 766         .unlink = xattr_tdb_unlink,
 767         .rmdir = xattr_tdb_rmdir,
 768         .connect_fn = xattr_tdb_connect,
 769 };
 770
 771 NTSTATUS vfs_xattr_tdb_init(void);
 772 NTSTATUS vfs_xattr_tdb_init(void)
 773 {
 774         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "xattr_tdb",
 775                                 &vfs_xattr_tdb_fns);
 776 }