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 "system/filesys.h"
  22 #include "smbd/smbd.h"
  23 #include "librpc/gen_ndr/xattr.h"
  24 #include "librpc/gen_ndr/ndr_xattr.h"
  25 #include "../librpc/gen_ndr/ndr_netlogon.h"
  26 #include "dbwrap/dbwrap.h"
  27 #include "dbwrap/dbwrap_open.h"
  28 #include "util_tdb.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_VFS
  32
  33 /*
  34  * unmarshall tdb_xattrs
  35  */
  36
  37 static NTSTATUS xattr_tdb_pull_attrs(TALLOC_CTX *mem_ctx,
  38                                      const TDB_DATA *data,
  39                                      struct tdb_xattrs **presult)
  40 {
  41         DATA_BLOB blob;
  42         enum ndr_err_code ndr_err;
  43         struct tdb_xattrs *result;
  44
  45         if (!(result = talloc_zero(mem_ctx, struct tdb_xattrs))) {
  46                 return NT_STATUS_NO_MEMORY;
  47         }
  48
  49         if (data->dsize == 0) {
  50                 *presult = result;
  51                 return NT_STATUS_OK;
  52         }
  53
  54         blob = data_blob_const(data->dptr, data->dsize);
  55
  56         ndr_err = ndr_pull_struct_blob(&blob, result, result,
  57                 (ndr_pull_flags_fn_t)ndr_pull_tdb_xattrs);
  58
  59         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  60                 DEBUG(0, ("ndr_pull_tdb_xattrs failed: %s\n",
  61                           ndr_errstr(ndr_err)));
  62                 TALLOC_FREE(result);
  63                 return ndr_map_error2ntstatus(ndr_err);
  64         }
  65
  66         *presult = result;
  67         return NT_STATUS_OK;
  68 }
  69
  70 /*
  71  * marshall tdb_xattrs
  72  */
  73
  74 static NTSTATUS xattr_tdb_push_attrs(TALLOC_CTX *mem_ctx,
  75                                      const struct tdb_xattrs *attribs,
  76                                      TDB_DATA *data)
  77 {
  78         DATA_BLOB blob;
  79         enum ndr_err_code ndr_err;
  80
  81         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, attribs,
  82                 (ndr_push_flags_fn_t)ndr_push_tdb_xattrs);
  83
  84         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  85                 DEBUG(0, ("ndr_push_tdb_xattrs failed: %s\n",
  86                           ndr_errstr(ndr_err)));
  87                 return ndr_map_error2ntstatus(ndr_err);
  88         }
  89
  90         *data = make_tdb_data(blob.data, blob.length);
  91         return NT_STATUS_OK;
  92 }
  93
  94 /*
  95  * Load tdb_xattrs for a file from the tdb
  96  */
  97
  98 static NTSTATUS xattr_tdb_load_attrs(TALLOC_CTX *mem_ctx,
  99                                      struct db_context *db_ctx,
 100                                      const struct file_id *id,
 101                                      struct tdb_xattrs **presult)
 102 {
 103         uint8 id_buf[16];
 104         NTSTATUS status;
 105         TDB_DATA data;
 106
 107         /* For backwards compatibility only store the dev/inode. */
 108         push_file_id_16((char *)id_buf, id);
 109
 110         status = dbwrap_fetch(db_ctx, mem_ctx,
 111                               make_tdb_data(id_buf, sizeof(id_buf)),
 112                               &data);
 113         if (!NT_STATUS_IS_OK(status)) {
 114                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 115         }
 116
 117         status = xattr_tdb_pull_attrs(mem_ctx, &data, presult);
 118         TALLOC_FREE(data.dptr);
 119         return status;
 120 }
 121
 122 /*
 123  * fetch_lock the tdb_ea record for a file
 124  */
 125
 126 static struct db_record *xattr_tdb_lock_attrs(TALLOC_CTX *mem_ctx,
 127                                               struct db_context *db_ctx,
 128                                               const struct file_id *id)
 129 {
 130         uint8 id_buf[16];
 131
 132         /* For backwards compatibility only store the dev/inode. */
 133         push_file_id_16((char *)id_buf, id);
 134         return dbwrap_fetch_locked(db_ctx, mem_ctx,
 135                                    make_tdb_data(id_buf, sizeof(id_buf)));
 136 }
 137
 138 /*
 139  * Save tdb_xattrs to a previously fetch_locked record
 140  */
 141
 142 static NTSTATUS xattr_tdb_save_attrs(struct db_record *rec,
 143                                      const struct tdb_xattrs *attribs)
 144 {
 145         TDB_DATA data = tdb_null;
 146         NTSTATUS status;
 147
 148         status = xattr_tdb_push_attrs(talloc_tos(), attribs, &data);
 149
 150         if (!NT_STATUS_IS_OK(status)) {
 151                 DEBUG(0, ("xattr_tdb_push_attrs failed: %s\n",
 152                           nt_errstr(status)));
 153                 return status;
 154         }
 155
 156         status = dbwrap_record_store(rec, data, 0);
 157
 158         TALLOC_FREE(data.dptr);
 159
 160         return status;
 161 }
 162
 163 /*
 164  * Worker routine for getxattr and fgetxattr
 165  */
 166
 167 static ssize_t xattr_tdb_getattr(struct db_context *db_ctx,
 168                                  const struct file_id *id,
 169                                  const char *name, void *value, size_t size)
 170 {
 171         struct tdb_xattrs *attribs;
 172         uint32_t i;
 173         ssize_t result = -1;
 174         NTSTATUS status;
 175
 176         DEBUG(10, ("xattr_tdb_getattr called for file %s, name %s\n",
 177                    file_id_string_tos(id), name));
 178
 179         status = xattr_tdb_load_attrs(talloc_tos(), db_ctx, id, &attribs);
 180
 181         if (!NT_STATUS_IS_OK(status)) {
 182                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 183                            nt_errstr(status)));
 184                 errno = EINVAL;
 185                 return -1;
 186         }
 187
 188         for (i=0; i<attribs->num_eas; i++) {
 189                 if (strcmp(attribs->eas[i].name, name) == 0) {
 190                         break;
 191                 }
 192         }
 193
 194         if (i == attribs->num_eas) {
 195                 errno = ENOATTR;
 196                 goto fail;
 197         }
 198
 199         if (attribs->eas[i].value.length > size) {
 200                 errno = ERANGE;
 201                 goto fail;
 202         }
 203
 204         memcpy(value, attribs->eas[i].value.data,
 205                attribs->eas[i].value.length);
 206         result = attribs->eas[i].value.length;
 207
 208  fail:
 209         TALLOC_FREE(attribs);
 210         return result;
 211 }
 212
 213 static ssize_t xattr_tdb_getxattr(struct vfs_handle_struct *handle,
 214                                   const char *path, const char *name,
 215                                   void *value, size_t size)
 216 {
 217         SMB_STRUCT_STAT sbuf;
 218         struct file_id id;
 219         struct db_context *db;
 220
 221         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 222
 223         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 224                 return -1;
 225         }
 226
 227         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 228
 229         return xattr_tdb_getattr(db, &id, name, value, size);
 230 }
 231
 232 static ssize_t xattr_tdb_fgetxattr(struct vfs_handle_struct *handle,
 233                                    struct files_struct *fsp,
 234                                    const char *name, void *value, size_t size)
 235 {
 236         SMB_STRUCT_STAT sbuf;
 237         struct file_id id;
 238         struct db_context *db;
 239
 240         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 241
 242         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 243                 return -1;
 244         }
 245
 246         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 247
 248         return xattr_tdb_getattr(db, &id, name, value, size);
 249 }
 250
 251 /*
 252  * Worker routine for setxattr and fsetxattr
 253  */
 254
 255 static int xattr_tdb_setattr(struct db_context *db_ctx,
 256                              const struct file_id *id, const char *name,
 257                              const void *value, size_t size, int flags)
 258 {
 259         NTSTATUS status;
 260         struct db_record *rec;
 261         struct tdb_xattrs *attribs;
 262         uint32_t i;
 263         TDB_DATA data;
 264
 265         DEBUG(10, ("xattr_tdb_setattr called for file %s, name %s\n",
 266                    file_id_string_tos(id), name));
 267
 268         rec = xattr_tdb_lock_attrs(talloc_tos(), db_ctx, id);
 269
 270         if (rec == NULL) {
 271                 DEBUG(0, ("xattr_tdb_lock_attrs failed\n"));
 272                 errno = EINVAL;
 273                 return -1;
 274         }
 275
 276         data = dbwrap_record_get_value(rec);
 277
 278         status = xattr_tdb_pull_attrs(rec, &data, &attribs);
 279
 280         if (!NT_STATUS_IS_OK(status)) {
 281                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 282                            nt_errstr(status)));
 283                 TALLOC_FREE(rec);
 284                 return -1;
 285         }
 286
 287         for (i=0; i<attribs->num_eas; i++) {
 288                 if (strcmp(attribs->eas[i].name, name) == 0) {
 289                         if (flags & XATTR_CREATE) {
 290                                 TALLOC_FREE(rec);
 291                                 errno = EEXIST;
 292                                 return -1;
 293                         }
 294                         break;
 295                 }
 296         }
 297
 298         if (i == attribs->num_eas) {
 299                 struct xattr_EA *tmp;
 300
 301                 if (flags & XATTR_REPLACE) {
 302                         TALLOC_FREE(rec);
 303                         errno = ENOATTR;
 304                         return -1;
 305                 }
 306
 307                 tmp = talloc_realloc(
 308                         attribs, attribs->eas, struct xattr_EA,
 309                         attribs->num_eas+ 1);
 310
 311                 if (tmp == NULL) {
 312                         DEBUG(0, ("talloc_realloc failed\n"));
 313                         TALLOC_FREE(rec);
 314                         errno = ENOMEM;
 315                         return -1;
 316                 }
 317
 318                 attribs->eas = tmp;
 319                 attribs->num_eas += 1;
 320         }
 321
 322         attribs->eas[i].name = name;
 323         attribs->eas[i].value.data = discard_const_p(uint8, value);
 324         attribs->eas[i].value.length = size;
 325
 326         status = xattr_tdb_save_attrs(rec, attribs);
 327
 328         TALLOC_FREE(rec);
 329
 330         if (!NT_STATUS_IS_OK(status)) {
 331                 DEBUG(1, ("save failed: %s\n", nt_errstr(status)));
 332                 return -1;
 333         }
 334
 335         return 0;
 336 }
 337
 338 static int xattr_tdb_setxattr(struct vfs_handle_struct *handle,
 339                               const char *path, const char *name,
 340                               const void *value, size_t size, int flags)
 341 {
 342         SMB_STRUCT_STAT sbuf;
 343         struct file_id id;
 344         struct db_context *db;
 345
 346         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 347
 348         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 349                 return -1;
 350         }
 351
 352         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 353
 354         return xattr_tdb_setattr(db, &id, name, value, size, flags);
 355 }
 356
 357 static int xattr_tdb_fsetxattr(struct vfs_handle_struct *handle,
 358                                struct files_struct *fsp,
 359                                const char *name, const void *value,
 360                                size_t size, int flags)
 361 {
 362         SMB_STRUCT_STAT sbuf;
 363         struct file_id id;
 364         struct db_context *db;
 365
 366         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 367
 368         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 369                 return -1;
 370         }
 371
 372         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 373
 374         return xattr_tdb_setattr(db, &id, name, value, size, flags);
 375 }
 376
 377 /*
 378  * Worker routine for listxattr and flistxattr
 379  */
 380
 381 static ssize_t xattr_tdb_listattr(struct db_context *db_ctx,
 382                                   const struct file_id *id, char *list,
 383                                   size_t size)
 384 {
 385         NTSTATUS status;
 386         struct tdb_xattrs *attribs;
 387         uint32_t i;
 388         size_t len = 0;
 389
 390         status = xattr_tdb_load_attrs(talloc_tos(), db_ctx, id, &attribs);
 391
 392         if (!NT_STATUS_IS_OK(status)) {
 393                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 394                            nt_errstr(status)));
 395                 errno = EINVAL;
 396                 return -1;
 397         }
 398
 399         DEBUG(10, ("xattr_tdb_listattr: Found %d xattrs\n",
 400                    attribs->num_eas));
 401
 402         for (i=0; i<attribs->num_eas; i++) {
 403                 size_t tmp;
 404
 405                 DEBUG(10, ("xattr_tdb_listattr: xattrs[i].name: %s\n",
 406                            attribs->eas[i].name));
 407
 408                 tmp = strlen(attribs->eas[i].name);
 409
 410                 /*
 411                  * Try to protect against overflow
 412                  */
 413
 414                 if (len + (tmp+1) < len) {
 415                         TALLOC_FREE(attribs);
 416                         errno = EINVAL;
 417                         return -1;
 418                 }
 419
 420                 /*
 421                  * Take care of the terminating NULL
 422                  */
 423                 len += (tmp + 1);
 424         }
 425
 426         if (len > size) {
 427                 TALLOC_FREE(attribs);
 428                 errno = ERANGE;
 429                 return len;
 430         }
 431
 432         len = 0;
 433
 434         for (i=0; i<attribs->num_eas; i++) {
 435                 strlcpy(list+len, attribs->eas[i].name,
 436                         size-len);
 437                 len += (strlen(attribs->eas[i].name) + 1);
 438         }
 439
 440         TALLOC_FREE(attribs);
 441         return len;
 442 }
 443
 444 static ssize_t xattr_tdb_listxattr(struct vfs_handle_struct *handle,
 445                                    const char *path, char *list, size_t size)
 446 {
 447         SMB_STRUCT_STAT sbuf;
 448         struct file_id id;
 449         struct db_context *db;
 450
 451         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 452
 453         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 454                 return -1;
 455         }
 456
 457         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 458
 459         return xattr_tdb_listattr(db, &id, list, size);
 460 }
 461
 462 static ssize_t xattr_tdb_flistxattr(struct vfs_handle_struct *handle,
 463                                     struct files_struct *fsp, char *list,
 464                                     size_t size)
 465 {
 466         SMB_STRUCT_STAT sbuf;
 467         struct file_id id;
 468         struct db_context *db;
 469
 470         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 471
 472         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 473                 return -1;
 474         }
 475
 476         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 477
 478         return xattr_tdb_listattr(db, &id, list, size);
 479 }
 480
 481 /*
 482  * Worker routine for removexattr and fremovexattr
 483  */
 484
 485 static int xattr_tdb_removeattr(struct db_context *db_ctx,
 486                                 const struct file_id *id, const char *name)
 487 {
 488         NTSTATUS status;
 489         struct db_record *rec;
 490         struct tdb_xattrs *attribs;
 491         uint32_t i;
 492         TDB_DATA value;
 493
 494         rec = xattr_tdb_lock_attrs(talloc_tos(), db_ctx, id);
 495
 496         if (rec == NULL) {
 497                 DEBUG(0, ("xattr_tdb_lock_attrs failed\n"));
 498                 errno = EINVAL;
 499                 return -1;
 500         }
 501
 502         value = dbwrap_record_get_value(rec);
 503
 504         status = xattr_tdb_pull_attrs(rec, &value, &attribs);
 505
 506         if (!NT_STATUS_IS_OK(status)) {
 507                 DEBUG(10, ("xattr_tdb_fetch_attrs failed: %s\n",
 508                            nt_errstr(status)));
 509                 TALLOC_FREE(rec);
 510                 return -1;
 511         }
 512
 513         for (i=0; i<attribs->num_eas; i++) {
 514                 if (strcmp(attribs->eas[i].name, name) == 0) {
 515                         break;
 516                 }
 517         }
 518
 519         if (i == attribs->num_eas) {
 520                 TALLOC_FREE(rec);
 521                 errno = ENOATTR;
 522                 return -1;
 523         }
 524
 525         attribs->eas[i] =
 526                 attribs->eas[attribs->num_eas-1];
 527         attribs->num_eas -= 1;
 528
 529         if (attribs->num_eas == 0) {
 530                 dbwrap_record_delete(rec);
 531                 TALLOC_FREE(rec);
 532                 return 0;
 533         }
 534
 535         status = xattr_tdb_save_attrs(rec, attribs);
 536
 537         TALLOC_FREE(rec);
 538
 539         if (!NT_STATUS_IS_OK(status)) {
 540                 DEBUG(1, ("save failed: %s\n", nt_errstr(status)));
 541                 return -1;
 542         }
 543
 544         return 0;
 545 }
 546
 547 static int xattr_tdb_removexattr(struct vfs_handle_struct *handle,
 548                                  const char *path, const char *name)
 549 {
 550         SMB_STRUCT_STAT sbuf;
 551         struct file_id id;
 552         struct db_context *db;
 553
 554         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 555
 556         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 557                 return -1;
 558         }
 559
 560         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 561
 562         return xattr_tdb_removeattr(db, &id, name);
 563 }
 564
 565 static int xattr_tdb_fremovexattr(struct vfs_handle_struct *handle,
 566                                   struct files_struct *fsp, const char *name)
 567 {
 568         SMB_STRUCT_STAT sbuf;
 569         struct file_id id;
 570         struct db_context *db;
 571
 572         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 573
 574         if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
 575                 return -1;
 576         }
 577
 578         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 579
 580         return xattr_tdb_removeattr(db, &id, name);
 581 }
 582
 583 /*
 584  * Open the tdb file upon VFS_CONNECT
 585  */
 586
 587 static bool xattr_tdb_init(int snum, struct db_context **p_db)
 588 {
 589         struct db_context *db;
 590         const char *dbname;
 591         char *def_dbname;
 592
 593         def_dbname = state_path("xattr.tdb");
 594         if (def_dbname == NULL) {
 595                 errno = ENOSYS;
 596                 return false;
 597         }
 598
 599         dbname = lp_parm_const_string(snum, "xattr_tdb", "file", def_dbname);
 600
 601         /* now we know dbname is not NULL */
 602
 603         become_root();
 604         db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
 605                      DBWRAP_LOCK_ORDER_2);
 606         unbecome_root();
 607
 608         if (db == NULL) {
 609 #if defined(ENOTSUP)
 610                 errno = ENOTSUP;
 611 #else
 612                 errno = ENOSYS;
 613 #endif
 614                 TALLOC_FREE(def_dbname);
 615                 return false;
 616         }
 617
 618         *p_db = db;
 619         TALLOC_FREE(def_dbname);
 620         return true;
 621 }
 622
 623 /*
 624  * On unlink we need to delete the tdb record
 625  */
 626 static int xattr_tdb_unlink(vfs_handle_struct *handle,
 627                             const struct smb_filename *smb_fname)
 628 {
 629         struct smb_filename *smb_fname_tmp = NULL;
 630         struct file_id id;
 631         struct db_context *db;
 632         struct db_record *rec;
 633         NTSTATUS status;
 634         int ret = -1;
 635         bool remove_record = false;
 636
 637         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 638
 639         status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
 640         if (!NT_STATUS_IS_OK(status)) {
 641                 errno = map_errno_from_nt_status(status);
 642                 return -1;
 643         }
 644
 645         if (lp_posix_pathnames()) {
 646                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
 647         } else {
 648                 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
 649         }
 650         if (ret == -1) {
 651                 goto out;
 652         }
 653
 654         if (smb_fname_tmp->st.st_ex_nlink == 1) {
 655                 /* Only remove record on last link to file. */
 656                 remove_record = true;
 657         }
 658
 659         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 660
 661         if (ret == -1) {
 662                 goto out;
 663         }
 664
 665         if (!remove_record) {
 666                 goto out;
 667         }
 668
 669         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &smb_fname_tmp->st);
 670
 671         rec = xattr_tdb_lock_attrs(talloc_tos(), db, &id);
 672
 673         /*
 674          * If rec == NULL there's not much we can do about it
 675          */
 676
 677         if (rec != NULL) {
 678                 dbwrap_record_delete(rec);
 679                 TALLOC_FREE(rec);
 680         }
 681
 682  out:
 683         TALLOC_FREE(smb_fname_tmp);
 684         return ret;
 685 }
 686
 687 /*
 688  * On rmdir we need to delete the tdb record
 689  */
 690 static int xattr_tdb_rmdir(vfs_handle_struct *handle, const char *path)
 691 {
 692         SMB_STRUCT_STAT sbuf;
 693         struct file_id id;
 694         struct db_context *db;
 695         struct db_record *rec;
 696         int ret;
 697
 698         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 699
 700         if (vfs_stat_smb_fname(handle->conn, path, &sbuf) == -1) {
 701                 return -1;
 702         }
 703
 704         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 705
 706         if (ret == -1) {
 707                 return -1;
 708         }
 709
 710         id = SMB_VFS_FILE_ID_CREATE(handle->conn, &sbuf);
 711
 712         rec = xattr_tdb_lock_attrs(talloc_tos(), db, &id);
 713
 714         /*
 715          * If rec == NULL there's not much we can do about it
 716          */
 717
 718         if (rec != NULL) {
 719                 dbwrap_record_delete(rec);
 720                 TALLOC_FREE(rec);
 721         }
 722
 723         return 0;
 724 }
 725
 726 /*
 727  * Destructor for the VFS private data
 728  */
 729
 730 static void close_xattr_db(void **data)
 731 {
 732         struct db_context **p_db = (struct db_context **)data;
 733         TALLOC_FREE(*p_db);
 734 }
 735
 736 static int xattr_tdb_connect(vfs_handle_struct *handle, const char *service,
 737                           const char *user)
 738 {
 739         char *sname = NULL;
 740         int res, snum;
 741         struct db_context *db;
 742
 743         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 744         if (res < 0) {
 745                 return res;
 746         }
 747
 748         snum = find_service(talloc_tos(), service, &sname);
 749         if (snum == -1 || sname == NULL) {
 750                 /*
 751                  * Should not happen, but we should not fail just *here*.
 752                  */
 753                 return 0;
 754         }
 755
 756         if (!xattr_tdb_init(snum, &db)) {
 757                 DEBUG(5, ("Could not init xattr tdb\n"));
 758                 lp_do_parameter(snum, "ea support", "False");
 759                 return 0;
 760         }
 761
 762         lp_do_parameter(snum, "ea support", "True");
 763
 764         SMB_VFS_HANDLE_SET_DATA(handle, db, close_xattr_db,
 765                                 struct db_context, return -1);
 766
 767         return 0;
 768 }
 769
 770 static struct vfs_fn_pointers vfs_xattr_tdb_fns = {
 771         .getxattr_fn = xattr_tdb_getxattr,
 772         .fgetxattr_fn = xattr_tdb_fgetxattr,
 773         .setxattr_fn = xattr_tdb_setxattr,
 774         .fsetxattr_fn = xattr_tdb_fsetxattr,
 775         .listxattr_fn = xattr_tdb_listxattr,
 776         .flistxattr_fn = xattr_tdb_flistxattr,
 777         .removexattr_fn = xattr_tdb_removexattr,
 778         .fremovexattr_fn = xattr_tdb_fremovexattr,
 779         .unlink_fn = xattr_tdb_unlink,
 780         .rmdir_fn = xattr_tdb_rmdir,
 781         .connect_fn = xattr_tdb_connect,
 782 };
 783
 784 NTSTATUS vfs_xattr_tdb_init(void);
 785 NTSTATUS vfs_xattr_tdb_init(void)
 786 {
 787         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "xattr_tdb",
 788                                 &vfs_xattr_tdb_fns);
 789 }