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(
  51                 &blob, result, NULL, result,
  52                 (ndr_pull_flags_fn_t)ndr_pull_tdb_xattrs);
  53
  54         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  55                 DEBUG(0, ("ndr_pull_tdb_xattrs failed: %s\n",
  56                           ndr_errstr(ndr_err)));
  57                 TALLOC_FREE(result);
  58                 return ndr_map_error2ntstatus(ndr_err);;
  59         }
  60
  61         *presult = result;
  62         return NT_STATUS_OK;
  63 }
  64
  65 /*
  66  * marshall tdb_xattrs
  67  */
  68
  69 static NTSTATUS xattr_tdb_push_attrs(TALLOC_CTX *mem_ctx,
  70                                      const struct tdb_xattrs *attribs,
  71                                      TDB_DATA *data)
  72 {
  73         DATA_BLOB blob;
  74         enum ndr_err_code ndr_err;
  75
  76         ndr_err = ndr_push_struct_blob(
  77                 &blob, mem_ctx, NULL, attribs,
  78                 (ndr_push_flags_fn_t)ndr_push_tdb_xattrs);
  79
  80         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  81                 DEBUG(0, ("ndr_push_tdb_xattrs failed: %s\n",
  82                           ndr_errstr(ndr_err)));
  83                 return ndr_map_error2ntstatus(ndr_err);;
  84         }
  85
  86         *data = make_tdb_data(blob.data, blob.length);
  87         return NT_STATUS_OK;
  88 }
  89
  90 /*
  91  * Load tdb_xattrs for a file from the tdb
  92  */
  93
  94 static NTSTATUS xattr_tdb_load_attrs(TALLOC_CTX *mem_ctx,
  95                                      struct db_context *db_ctx,
  96                                      const struct file_id *id,
  97                                      struct tdb_xattrs **presult)
  98 {
  99         uint8 id_buf[16];
 100         NTSTATUS status;
 101         TDB_DATA data;
 102
 103         /* For backwards compatibility only store the dev/inode. */
 104         push_file_id_16((char *)id_buf, id);
 105
 106         if (db_ctx->fetch(db_ctx, mem_ctx,
 107                           make_tdb_data(id_buf, sizeof(id_buf)),
 108                           &data) == -1) {
 109                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 110         }
 111
 112         status = xattr_tdb_pull_attrs(mem_ctx, &data, presult);
 113         TALLOC_FREE(data.dptr);
 114         return status;
 115 }
 116
 117 /*
 118  * fetch_lock the tdb_ea record for a file
 119  */
 120
 121 static struct db_record *xattr_tdb_lock_attrs(TALLOC_CTX *mem_ctx,
 122                                               struct db_context *db_ctx,
 123                                               const struct file_id *id)
 124 {
 125         uint8 id_buf[16];
 126
 127         /* For backwards compatibility only store the dev/inode. */
 128         push_file_id_16((char *)id_buf, id);
 129         return db_ctx->fetch_locked(db_ctx, mem_ctx,
 130                                     make_tdb_data(id_buf, sizeof(id_buf)));
 131 }
 132
 133 /*
 134  * Save tdb_xattrs to a previously fetch_locked record
 135  */
 136
 137 static NTSTATUS xattr_tdb_save_attrs(struct db_record *rec,
 138                                      const struct tdb_xattrs *attribs)
 139 {
 140         TDB_DATA data = tdb_null;
 141         NTSTATUS status;
 142
 143         status = xattr_tdb_push_attrs(talloc_tos(), attribs, &data);
 144
 145         if (!NT_STATUS_IS_OK(status)) {
 146                 DEBUG(0, ("xattr_tdb_push_attrs failed: %s\n",
 147                           nt_errstr(status)));
 148                 return status;
 149         }
 150
 151         status = rec->store(rec, data, 0);
 152
 153         TALLOC_FREE(data.dptr);
 154
 155         return status;
 156 }
 157
 158 /*
 159  * Worker routine for getxattr and fgetxattr
 160  */
 161
 162 static ssize_t xattr_tdb_getattr(struct db_context *db_ctx,
 163                                  const struct file_id *id,
 164                                  const char *name, void *value, size_t size)
 165 {
 166         struct tdb_xattrs *attribs;
 167         uint32_t i;
 168         ssize_t result = -1;
 169         NTSTATUS status;
 170
 171         DEBUG(10, ("xattr_tdb_getattr called for file %s, name %s\n",
 172                    file_id_string_tos(id), name));
 173
 174         status = xattr_tdb_load_attrs(talloc_tos(), db_ctx, id, &attribs);
 175
 176         if (!NT_STATUS_IS_OK(status)) {
 177                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 178                            nt_errstr(status)));
 179                 errno = EINVAL;
 180                 return -1;
 181         }
 182
 183         for (i=0; i<attribs->num_eas; i++) {
 184                 if (strcmp(attribs->eas[i].name, name) == 0) {
 185                         break;
 186                 }
 187         }
 188
 189         if (i == attribs->num_eas) {
 190                 errno = ENOATTR;
 191                 goto fail;
 192         }
 193
 194         if (attribs->eas[i].value.length > size) {
 195                 errno = ERANGE;
 196                 goto fail;
 197         }
 198
 199         memcpy(value, attribs->eas[i].value.data,
 200                attribs->eas[i].value.length);
 201         result = attribs->eas[i].value.length;
 202
 203  fail:
 204         TALLOC_FREE(attribs);
 205         return result;
 206 }
 207
 208 static ssize_t xattr_tdb_getxattr(struct vfs_handle_struct *handle,
 209                                   const char *path, const char *name,
 210                                   void *value, size_t size)
 211 {
 212         SMB_STRUCT_STAT sbuf;
 213         struct file_id id;
 214         struct db_context *db;
 215
 216         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 217
 218         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 219                 return -1;
 220         }
 221
 222         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 223
 224         return xattr_tdb_getattr(db, &id, name, value, size);
 225 }
 226
 227 static ssize_t xattr_tdb_fgetxattr(struct vfs_handle_struct *handle,
 228                                    struct files_struct *fsp,
 229                                    const char *name, void *value, size_t size)
 230 {
 231         SMB_STRUCT_STAT sbuf;
 232         struct file_id id;
 233         struct db_context *db;
 234
 235         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 236
 237         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 238                 return -1;
 239         }
 240
 241         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 242
 243         return xattr_tdb_getattr(db, &id, name, value, size);
 244 }
 245
 246 /*
 247  * Worker routine for setxattr and fsetxattr
 248  */
 249
 250 static int xattr_tdb_setattr(struct db_context *db_ctx,
 251                              const struct file_id *id, const char *name,
 252                              const void *value, size_t size, int flags)
 253 {
 254         NTSTATUS status;
 255         struct db_record *rec;
 256         struct tdb_xattrs *attribs;
 257         uint32_t i;
 258
 259         DEBUG(10, ("xattr_tdb_setattr called for file %s, name %s\n",
 260                    file_id_string_tos(id), name));
 261
 262         rec = xattr_tdb_lock_attrs(talloc_tos(), db_ctx, id);
 263
 264         if (rec == NULL) {
 265                 DEBUG(0, ("xattr_tdb_lock_attrs failed\n"));
 266                 errno = EINVAL;
 267                 return -1;
 268         }
 269
 270         status = xattr_tdb_pull_attrs(rec, &rec->value, &attribs);
 271
 272         if (!NT_STATUS_IS_OK(status)) {
 273                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 274                            nt_errstr(status)));
 275                 TALLOC_FREE(rec);
 276                 return -1;
 277         }
 278
 279         for (i=0; i<attribs->num_eas; i++) {
 280                 if (strcmp(attribs->eas[i].name, name) == 0) {
 281                         if (flags & XATTR_CREATE) {
 282                                 TALLOC_FREE(rec);
 283                                 errno = EEXIST;
 284                                 return -1;
 285                         }
 286                         break;
 287                 }
 288         }
 289
 290         if (i == attribs->num_eas) {
 291                 struct xattr_EA *tmp;
 292
 293                 if (flags & XATTR_REPLACE) {
 294                         TALLOC_FREE(rec);
 295                         errno = ENOATTR;
 296                         return -1;
 297                 }
 298
 299                 tmp = TALLOC_REALLOC_ARRAY(
 300                         attribs, attribs->eas, struct xattr_EA,
 301                         attribs->num_eas+ 1);
 302
 303                 if (tmp == NULL) {
 304                         DEBUG(0, ("TALLOC_REALLOC_ARRAY failed\n"));
 305                         TALLOC_FREE(rec);
 306                         errno = ENOMEM;
 307                         return -1;
 308                 }
 309
 310                 attribs->eas = tmp;
 311                 attribs->num_eas += 1;
 312         }
 313
 314         attribs->eas[i].name = name;
 315         attribs->eas[i].value.data = CONST_DISCARD(uint8 *, value);
 316         attribs->eas[i].value.length = size;
 317
 318         status = xattr_tdb_save_attrs(rec, attribs);
 319
 320         TALLOC_FREE(rec);
 321
 322         if (!NT_STATUS_IS_OK(status)) {
 323                 DEBUG(1, ("save failed: %s\n", nt_errstr(status)));
 324                 return -1;
 325         }
 326
 327         return 0;
 328 }
 329
 330 static int xattr_tdb_setxattr(struct vfs_handle_struct *handle,
 331                               const char *path, const char *name,
 332                               const void *value, size_t size, int flags)
 333 {
 334         SMB_STRUCT_STAT sbuf;
 335         struct file_id id;
 336         struct db_context *db;
 337
 338         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 339
 340         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 341                 return -1;
 342         }
 343
 344         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 345
 346         return xattr_tdb_setattr(db, &id, name, value, size, flags);
 347 }
 348
 349 static int xattr_tdb_fsetxattr(struct vfs_handle_struct *handle,
 350                                struct files_struct *fsp,
 351                                const char *name, const void *value,
 352                                size_t size, int flags)
 353 {
 354         SMB_STRUCT_STAT sbuf;
 355         struct file_id id;
 356         struct db_context *db;
 357
 358         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 359
 360         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 361                 return -1;
 362         }
 363
 364         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 365
 366         return xattr_tdb_setattr(db, &id, name, value, size, flags);
 367 }
 368
 369 /*
 370  * Worker routine for listxattr and flistxattr
 371  */
 372
 373 static ssize_t xattr_tdb_listattr(struct db_context *db_ctx,
 374                                   const struct file_id *id, char *list,
 375                                   size_t size)
 376 {
 377         NTSTATUS status;
 378         struct tdb_xattrs *attribs;
 379         uint32_t i;
 380         size_t len = 0;
 381
 382         status = xattr_tdb_load_attrs(talloc_tos(), db_ctx, id, &attribs);
 383
 384         if (!NT_STATUS_IS_OK(status)) {
 385                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 386                            nt_errstr(status)));
 387                 errno = EINVAL;
 388                 return -1;
 389         }
 390
 391         DEBUG(10, ("xattr_tdb_listattr: Found %d xattrs\n",
 392                    attribs->num_eas));
 393
 394         for (i=0; i<attribs->num_eas; i++) {
 395                 size_t tmp;
 396
 397                 DEBUG(10, ("xattr_tdb_listattr: xattrs[i].name: %s\n",
 398                            attribs->eas[i].name));
 399
 400                 tmp = strlen(attribs->eas[i].name);
 401
 402                 /*
 403                  * Try to protect against overflow
 404                  */
 405
 406                 if (len + (tmp+1) < len) {
 407                         TALLOC_FREE(attribs);
 408                         errno = EINVAL;
 409                         return -1;
 410                 }
 411
 412                 /*
 413                  * Take care of the terminating NULL
 414                  */
 415                 len += (tmp + 1);
 416         }
 417
 418         if (len > size) {
 419                 TALLOC_FREE(attribs);
 420                 errno = ERANGE;
 421                 return -1;
 422         }
 423
 424         len = 0;
 425
 426         for (i=0; i<attribs->num_eas; i++) {
 427                 strlcpy(list+len, attribs->eas[i].name,
 428                         size-len);
 429                 len += (strlen(attribs->eas[i].name) + 1);
 430         }
 431
 432         TALLOC_FREE(attribs);
 433         return len;
 434 }
 435
 436 static ssize_t xattr_tdb_listxattr(struct vfs_handle_struct *handle,
 437                                    const char *path, char *list, size_t size)
 438 {
 439         SMB_STRUCT_STAT sbuf;
 440         struct file_id id;
 441         struct db_context *db;
 442
 443         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 444
 445         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 446                 return -1;
 447         }
 448
 449         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 450
 451         return xattr_tdb_listattr(db, &id, list, size);
 452 }
 453
 454 static ssize_t xattr_tdb_flistxattr(struct vfs_handle_struct *handle,
 455                                     struct files_struct *fsp, char *list,
 456                                     size_t size)
 457 {
 458         SMB_STRUCT_STAT sbuf;
 459         struct file_id id;
 460         struct db_context *db;
 461
 462         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 463
 464         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 465                 return -1;
 466         }
 467
 468         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 469
 470         return xattr_tdb_listattr(db, &id, list, size);
 471 }
 472
 473 /*
 474  * Worker routine for removexattr and fremovexattr
 475  */
 476
 477 static int xattr_tdb_removeattr(struct db_context *db_ctx,
 478                                 const struct file_id *id, const char *name)
 479 {
 480         NTSTATUS status;
 481         struct db_record *rec;
 482         struct tdb_xattrs *attribs;
 483         uint32_t i;
 484
 485         rec = xattr_tdb_lock_attrs(talloc_tos(), db_ctx, id);
 486
 487         if (rec == NULL) {
 488                 DEBUG(0, ("xattr_tdb_lock_attrs failed\n"));
 489                 errno = EINVAL;
 490                 return -1;
 491         }
 492
 493         status = xattr_tdb_pull_attrs(rec, &rec->value, &attribs);
 494
 495         if (!NT_STATUS_IS_OK(status)) {
 496                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 497                            nt_errstr(status)));
 498                 TALLOC_FREE(rec);
 499                 return -1;
 500         }
 501
 502         for (i=0; i<attribs->num_eas; i++) {
 503                 if (strcmp(attribs->eas[i].name, name) == 0) {
 504                         break;
 505                 }
 506         }
 507
 508         if (i == attribs->num_eas) {
 509                 TALLOC_FREE(rec);
 510                 errno = ENOATTR;
 511                 return -1;
 512         }
 513
 514         attribs->eas[i] =
 515                 attribs->eas[attribs->num_eas-1];
 516         attribs->num_eas -= 1;
 517
 518         if (attribs->num_eas == 0) {
 519                 rec->delete_rec(rec);
 520                 TALLOC_FREE(rec);
 521                 return 0;
 522         }
 523
 524         status = xattr_tdb_save_attrs(rec, attribs);
 525
 526         TALLOC_FREE(rec);
 527
 528         if (!NT_STATUS_IS_OK(status)) {
 529                 DEBUG(1, ("save failed: %s\n", nt_errstr(status)));
 530                 return -1;
 531         }
 532
 533         return 0;
 534 }
 535
 536 static int xattr_tdb_removexattr(struct vfs_handle_struct *handle,
 537                                  const char *path, const char *name)
 538 {
 539         SMB_STRUCT_STAT sbuf;
 540         struct file_id id;
 541         struct db_context *db;
 542
 543         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 544
 545         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 546                 return -1;
 547         }
 548
 549         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 550
 551         return xattr_tdb_removeattr(db, &id, name);
 552 }
 553
 554 static int xattr_tdb_fremovexattr(struct vfs_handle_struct *handle,
 555                                   struct files_struct *fsp, const char *name)
 556 {
 557         SMB_STRUCT_STAT sbuf;
 558         struct file_id id;
 559         struct db_context *db;
 560
 561         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 562
 563         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 564                 return -1;
 565         }
 566
 567         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 568
 569         return xattr_tdb_removeattr(db, &id, name);
 570 }
 571
 572 /*
 573  * Open the tdb file upon VFS_CONNECT
 574  */
 575
 576 static bool xattr_tdb_init(int snum, struct db_context **p_db)
 577 {
 578         struct db_context *db;
 579         const char *dbname;
 580         char *def_dbname;
 581
 582         def_dbname = state_path("xattr.tdb");
 583         if (def_dbname == NULL) {
 584                 errno = ENOSYS;
 585                 return false;
 586         }
 587
 588         dbname = lp_parm_const_string(snum, "xattr_tdb", "file", def_dbname);
 589
 590         /* now we know dbname is not NULL */
 591
 592         become_root();
 593         db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
 594         unbecome_root();
 595
 596         if (db == NULL) {
 597 #if defined(ENOTSUP)
 598                 errno = ENOTSUP;
 599 #else
 600                 errno = ENOSYS;
 601 #endif
 602                 TALLOC_FREE(def_dbname);
 603                 return false;
 604         }
 605
 606         *p_db = db;
 607         TALLOC_FREE(def_dbname);
 608         return true;
 609 }
 610
 611 /*
 612  * On unlink we need to delete the tdb record
 613  */
 614 static int xattr_tdb_unlink(vfs_handle_struct *handle,
 615                             const struct smb_filename *smb_fname)
 616 {
 617         struct smb_filename *smb_fname_tmp = NULL;
 618         struct file_id id;
 619         struct db_context *db;
 620         struct db_record *rec;
 621         NTSTATUS status;
 622         int ret = -1;
 623         bool remove_record = false;
 624
 625         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 626
 627         status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
 628         if (!NT_STATUS_IS_OK(status)) {
 629                 errno = map_errno_from_nt_status(status);
 630                 return -1;
 631         }
 632
 633         if (lp_posix_pathnames()) {
 634                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
 635         } else {
 636                 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
 637         }
 638         if (ret == -1) {
 639                 goto out;
 640         }
 641
 642         if (smb_fname_tmp->st.st_ex_nlink == 1) {
 643                 /* Only remove record on last link to file. */
 644                 remove_record = true;
 645         }
 646
 647         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 648
 649         if (ret == -1) {
 650                 goto out;
 651         }
 652
 653         if (!remove_record) {
 654                 goto out;
 655         }
 656
 657         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &smb_fname_tmp->st);
 658
 659         rec = xattr_tdb_lock_attrs(talloc_tos(), db, &id);
 660
 661         /*
 662          * If rec == NULL there's not much we can do about it
 663          */
 664
 665         if (rec != NULL) {
 666                 rec->delete_rec(rec);
 667                 TALLOC_FREE(rec);
 668         }
 669
 670  out:
 671         TALLOC_FREE(smb_fname_tmp);
 672         return ret;
 673 }
 674
 675 /*
 676  * On rmdir we need to delete the tdb record
 677  */
 678 static int xattr_tdb_rmdir(vfs_handle_struct *handle, const char *path)
 679 {
 680         SMB_STRUCT_STAT sbuf;
 681         struct file_id id;
 682         struct db_context *db;
 683         struct db_record *rec;
 684         int ret;
 685
 686         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 687
 688         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 689                 return -1;
 690         }
 691
 692         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 693
 694         if (ret == -1) {
 695                 return -1;
 696         }
 697
 698         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 699
 700         rec = xattr_tdb_lock_attrs(talloc_tos(), db, &id);
 701
 702         /*
 703          * If rec == NULL there's not much we can do about it
 704          */
 705
 706         if (rec != NULL) {
 707                 rec->delete_rec(rec);
 708                 TALLOC_FREE(rec);
 709         }
 710
 711         return 0;
 712 }
 713
 714 /*
 715  * Destructor for the VFS private data
 716  */
 717
 718 static void close_xattr_db(void **data)
 719 {
 720         struct db_context **p_db = (struct db_context **)data;
 721         TALLOC_FREE(*p_db);
 722 }
 723
 724 static int xattr_tdb_connect(vfs_handle_struct *handle, const char *service,
 725                           const char *user)
 726 {
 727         fstring sname;
 728         int res, snum;
 729         struct db_context *db;
 730
 731         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 732         if (res < 0) {
 733                 return res;
 734         }
 735
 736         snum = find_service(service, sname);
 737         if (snum == -1) {
 738                 /*
 739                  * Should not happen, but we should not fail just *here*.
 740                  */
 741                 return 0;
 742         }
 743
 744         if (!xattr_tdb_init(snum, &db)) {
 745                 DEBUG(5, ("Could not init xattr tdb\n"));
 746                 lp_do_parameter(snum, "ea support", "False");
 747                 return 0;
 748         }
 749
 750         lp_do_parameter(snum, "ea support", "True");
 751
 752         SMB_VFS_HANDLE_SET_DATA(handle, db, close_xattr_db,
 753                                 struct db_context, return -1);
 754
 755         return 0;
 756 }
 757
 758 static struct vfs_fn_pointers vfs_xattr_tdb_fns = {
 759         .getxattr = xattr_tdb_getxattr,
 760         .fgetxattr = xattr_tdb_fgetxattr,
 761         .setxattr = xattr_tdb_setxattr,
 762         .fsetxattr = xattr_tdb_fsetxattr,
 763         .listxattr = xattr_tdb_listxattr,
 764         .flistxattr = xattr_tdb_flistxattr,
 765         .removexattr = xattr_tdb_removexattr,
 766         .fremovexattr = xattr_tdb_fremovexattr,
 767         .unlink = xattr_tdb_unlink,
 768         .rmdir = xattr_tdb_rmdir,
 769         .connect_fn = xattr_tdb_connect,
 770 };
 771
 772 NTSTATUS vfs_xattr_tdb_init(void);
 773 NTSTATUS vfs_xattr_tdb_init(void)
 774 {
 775         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "xattr_tdb",
 776                                 &vfs_xattr_tdb_fns);
 777 }