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