source/modules/vfs_acl_tdb.c

   1 /*
   2  * Store Windows ACLs in a tdb.
   3  *
   4  * Copyright (C) Volker Lendecke, 2008
   5  * Copyright (C) Jeremy Allison, 2008
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /* NOTE: This is an experimental module, not yet finished. JRA. */
  22
  23 #include "includes.h"
  24 #include "librpc/gen_ndr/xattr.h"
  25 #include "librpc/gen_ndr/ndr_xattr.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_VFS
  29
  30 static unsigned int ref_count;
  31 static struct db_context *acl_db;
  32
  33 /*******************************************************************
  34  Open acl_db if not already open, increment ref count.
  35 *******************************************************************/
  36
  37 static bool acl_tdb_init(struct db_context **pp_db)
  38 {
  39         const char *dbname;
  40
  41         if (acl_db) {
  42                 *pp_db = acl_db;
  43                 ref_count++;
  44                 return true;
  45         }
  46
  47         dbname = lock_path("file_ntacls.tdb");
  48
  49         if (dbname == NULL) {
  50                 errno = ENOSYS;
  51                 return false;
  52         }
  53
  54         become_root();
  55         *pp_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
  56         unbecome_root();
  57
  58         if (*pp_db == NULL) {
  59 #if defined(ENOTSUP)
  60                 errno = ENOTSUP;
  61 #else
  62                 errno = ENOSYS;
  63 #endif
  64                 return false;
  65         }
  66
  67         ref_count++;
  68         return true;
  69 }
  70
  71 /*******************************************************************
  72  Lower ref count and close acl_db if zero.
  73 *******************************************************************/
  74
  75 static void free_acl_tdb_data(void **pptr)
  76 {
  77         struct db_context **pp_db = (struct db_context **)pptr;
  78
  79         ref_count--;
  80         if (ref_count == 0) {
  81                 TALLOC_FREE(*pp_db);
  82                 acl_db = NULL;
  83         }
  84 }
  85
  86 /*******************************************************************
  87  Fetch_lock the tdb acl record for a file
  88 *******************************************************************/
  89
  90 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
  91                                         struct db_context *db,
  92                                         const struct file_id *id)
  93 {
  94         uint8 id_buf[16];
  95         push_file_id_16((char *)id_buf, id);
  96         return db->fetch_locked(db,
  97                                 mem_ctx,
  98                                 make_tdb_data(id_buf,
  99                                         sizeof(id_buf)));
 100 }
 101
 102 /*******************************************************************
 103  Delete the tdb acl record for a file
 104 *******************************************************************/
 105
 106 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
 107                                 struct db_context *db,
 108                                 SMB_STRUCT_STAT *psbuf)
 109 {
 110         NTSTATUS status;
 111         struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
 112         struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
 113
 114         /*
 115          * If rec == NULL there's not much we can do about it
 116          */
 117
 118         if (rec == NULL) {
 119                 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
 120                 TALLOC_FREE(rec);
 121                 return NT_STATUS_OK;
 122         }
 123
 124         status = rec->delete_rec(rec);
 125         TALLOC_FREE(rec);
 126         return status;
 127 }
 128
 129 /*******************************************************************
 130  Parse out a struct security_descriptor from a DATA_BLOB.
 131 *******************************************************************/
 132
 133 static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
 134                                 uint32 security_info,
 135                                 struct security_descriptor **ppdesc)
 136 {
 137         TALLOC_CTX *ctx = talloc_tos();
 138         struct xattr_NTACL xacl;
 139         enum ndr_err_code ndr_err;
 140         size_t sd_size;
 141
 142         ndr_err = ndr_pull_struct_blob(pblob, ctx, &xacl,
 143                         (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
 144
 145         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 146                 DEBUG(5, ("parse_acl_blob: ndr_pull_xattr_NTACL failed: %s\n",
 147                         ndr_errstr(ndr_err)));
 148                 return ndr_map_error2ntstatus(ndr_err);;
 149         }
 150
 151         if (xacl.version != 2) {
 152                 return NT_STATUS_REVISION_MISMATCH;
 153         }
 154
 155         *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_hs->sd->type | SEC_DESC_SELF_RELATIVE,
 156                         (security_info & OWNER_SECURITY_INFORMATION)
 157                         ? xacl.info.sd_hs->sd->owner_sid : NULL,
 158                         (security_info & GROUP_SECURITY_INFORMATION)
 159                         ? xacl.info.sd_hs->sd->group_sid : NULL,
 160                         (security_info & SACL_SECURITY_INFORMATION)
 161                         ? xacl.info.sd_hs->sd->sacl : NULL,
 162                         (security_info & DACL_SECURITY_INFORMATION)
 163                         ? xacl.info.sd_hs->sd->dacl : NULL,
 164                         &sd_size);
 165
 166         TALLOC_FREE(xacl.info.sd);
 167
 168         return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
 169 }
 170
 171 /*******************************************************************
 172  Pull a security descriptor into a DATA_BLOB from a tdb store.
 173 *******************************************************************/
 174
 175 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
 176                         vfs_handle_struct *handle,
 177                         files_struct *fsp,
 178                         const char *name,
 179                         DATA_BLOB *pblob)
 180 {
 181         uint8 id_buf[16];
 182         TDB_DATA data;
 183         struct file_id id;
 184         struct db_context *db;
 185         int ret = -1;
 186         SMB_STRUCT_STAT sbuf;
 187
 188         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 189                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 190
 191         if (fsp && fsp->fh->fd != -1) {
 192                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 193         } else {
 194                 if (fsp && fsp->posix_open) {
 195                         ret = SMB_VFS_LSTAT(handle->conn, name, &sbuf);
 196                 } else {
 197                         ret = SMB_VFS_STAT(handle->conn, name, &sbuf);
 198                 }
 199         }
 200
 201         if (ret == -1) {
 202                 return map_nt_error_from_unix(errno);
 203         }
 204
 205         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 206
 207         push_file_id_16((char *)id_buf, &id);
 208
 209         if (db->fetch(db,
 210                         ctx,
 211                         make_tdb_data(id_buf, sizeof(id_buf)),
 212                         &data) == -1) {
 213                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 214         }
 215
 216         pblob->data = data.dptr;
 217         pblob->length = data.dsize;
 218
 219         DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
 220                 (unsigned int)data.dsize, name ));
 221
 222         if (pblob->length == 0 || pblob->data == NULL) {
 223                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 224         }
 225         return NT_STATUS_OK;
 226 }
 227
 228 /*******************************************************************
 229  Create a DATA_BLOB from a security descriptor.
 230 *******************************************************************/
 231
 232 static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
 233 {
 234         struct xattr_NTACL xacl;
 235         struct security_descriptor_hash sd_hs;
 236         enum ndr_err_code ndr_err;
 237         TALLOC_CTX *ctx = talloc_tos();
 238
 239         ZERO_STRUCT(xacl);
 240         ZERO_STRUCT(sd_hs);
 241
 242         xacl.version = 2;
 243         xacl.info.sd_hs = &sd_hs;
 244         xacl.info.sd_hs->sd = CONST_DISCARD(struct security_descriptor *, psd);
 245         memset(&xacl.info.sd_hs->hash[0], '\0', 16);
 246
 247         ndr_err = ndr_push_struct_blob(
 248                         pblob, ctx, &xacl,
 249                         (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
 250
 251         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 252                 DEBUG(5, ("create_acl_blob: ndr_push_xattr_NTACL failed: %s\n",
 253                         ndr_errstr(ndr_err)));
 254                 return ndr_map_error2ntstatus(ndr_err);;
 255         }
 256
 257         return NT_STATUS_OK;
 258 }
 259
 260 /*******************************************************************
 261  Store a DATA_BLOB into a tdb record given an fsp pointer.
 262 *******************************************************************/
 263
 264 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
 265                                 files_struct *fsp,
 266                                 DATA_BLOB *pblob)
 267 {
 268         uint8 id_buf[16];
 269         struct file_id id;
 270         SMB_STRUCT_STAT sbuf;
 271         TDB_DATA data;
 272         struct db_context *db;
 273         struct db_record *rec;
 274         int ret = -1;
 275
 276         DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
 277                         (unsigned int)pblob->length, fsp->fsp_name));
 278
 279         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 280                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 281
 282         if (fsp->fh->fd != -1) {
 283                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 284         } else {
 285                 if (fsp->posix_open) {
 286                         ret = SMB_VFS_LSTAT(handle->conn, fsp->fsp_name, &sbuf);
 287                 } else {
 288                         ret = SMB_VFS_STAT(handle->conn, fsp->fsp_name, &sbuf);
 289                 }
 290         }
 291
 292         if (ret == -1) {
 293                 return map_nt_error_from_unix(errno);
 294         }
 295
 296         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 297
 298         push_file_id_16((char *)id_buf, &id);
 299         rec = db->fetch_locked(db, talloc_tos(),
 300                                 make_tdb_data(id_buf,
 301                                         sizeof(id_buf)));
 302         if (rec == NULL) {
 303                 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
 304                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 305         }
 306         data.dptr = pblob->data;
 307         data.dsize = pblob->length;
 308         return rec->store(rec, data, 0);
 309 }
 310
 311 /*******************************************************************
 312  Store a DATA_BLOB into a tdb record given a pathname.
 313 *******************************************************************/
 314
 315 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
 316                                         const char *fname,
 317                                         DATA_BLOB *pblob)
 318 {
 319         uint8 id_buf[16];
 320         struct file_id id;
 321         TDB_DATA data;
 322         SMB_STRUCT_STAT sbuf;
 323         struct db_context *db;
 324         struct db_record *rec;
 325         int ret = -1;
 326
 327         DEBUG(10,("store_acl_blob_pathname: storing blob "
 328                         "length %u on file %s\n",
 329                         (unsigned int)pblob->length, fname));
 330
 331         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 332                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 333
 334         if (lp_posix_pathnames()) {
 335                 ret = SMB_VFS_LSTAT(handle->conn, fname, &sbuf);
 336         } else {
 337                 ret = SMB_VFS_STAT(handle->conn, fname, &sbuf);
 338         }
 339
 340         if (ret == -1) {
 341                 return map_nt_error_from_unix(errno);
 342         }
 343
 344         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 345         push_file_id_16((char *)id_buf, &id);
 346
 347         rec = db->fetch_locked(db, talloc_tos(),
 348                                 make_tdb_data(id_buf,
 349                                         sizeof(id_buf)));
 350         if (rec == NULL) {
 351                 DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
 352                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 353         }
 354         data.dptr = pblob->data;
 355         data.dsize = pblob->length;
 356         return rec->store(rec, data, 0);
 357 }
 358
 359 /*******************************************************************
 360  Store a DATA_BLOB into an tdb given a pathname.
 361 *******************************************************************/
 362
 363 static NTSTATUS get_nt_acl_tdb_internal(vfs_handle_struct *handle,
 364                                         files_struct *fsp,
 365                                         const char *name,
 366                                         uint32 security_info,
 367                                         struct security_descriptor **ppdesc)
 368 {
 369         TALLOC_CTX *ctx = talloc_tos();
 370         DATA_BLOB blob;
 371         NTSTATUS status;
 372
 373         if (fsp && name == NULL) {
 374                 name = fsp->fsp_name;
 375         }
 376
 377         DEBUG(10, ("get_nt_acl_tdb_internal: name=%s\n", name));
 378
 379         status = get_acl_blob(ctx, handle, fsp, name, &blob);
 380         if (!NT_STATUS_IS_OK(status)) {
 381                 DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
 382                 return status;
 383         }
 384
 385         status = parse_acl_blob(&blob, security_info, ppdesc);
 386         if (!NT_STATUS_IS_OK(status)) {
 387                 DEBUG(10, ("parse_acl_blob returned %s\n",
 388                                 nt_errstr(status)));
 389                 return status;
 390         }
 391
 392         TALLOC_FREE(blob.data);
 393         return status;
 394 }
 395
 396 /*********************************************************************
 397  Create a default security descriptor for a file in case no inheritance
 398  exists. All permissions to the owner and SYSTEM.
 399 *********************************************************************/
 400
 401 static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
 402                                                 SMB_STRUCT_STAT *psbuf)
 403 {
 404         struct dom_sid owner_sid, group_sid;
 405         size_t sd_size;
 406         struct security_ace *pace = NULL;
 407         struct security_acl *pacl = NULL;
 408
 409         uid_to_sid(&owner_sid, psbuf->st_uid);
 410         gid_to_sid(&group_sid, psbuf->st_gid);
 411
 412         pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
 413         if (!pace) {
 414                 return NULL;
 415         }
 416
 417         init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
 418                         SEC_RIGHTS_FILE_ALL, 0);
 419         init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
 420                         SEC_RIGHTS_FILE_ALL, 0);
 421
 422         pacl = make_sec_acl(mem_ctx,
 423                                 NT4_ACL_REVISION,
 424                                 2,
 425                                 pace);
 426         if (!pacl) {
 427                 return NULL;
 428         }
 429         return make_sec_desc(mem_ctx,
 430                         SECURITY_DESCRIPTOR_REVISION_1,
 431                         SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
 432                         &owner_sid,
 433                         &group_sid,
 434                         NULL,
 435                         pacl,
 436                         &sd_size);
 437 }
 438
 439 /*********************************************************************
 440 *********************************************************************/
 441
 442 static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
 443                                         const char *fname,
 444                                         files_struct *fsp,
 445                                         bool container)
 446 {
 447         TALLOC_CTX *ctx = talloc_tos();
 448         NTSTATUS status;
 449         struct security_descriptor *parent_desc = NULL;
 450         struct security_descriptor *psd = NULL;
 451         DATA_BLOB blob;
 452         size_t size;
 453         char *parent_name;
 454
 455         if (!parent_dirname_talloc(ctx,
 456                                 fname,
 457                                 &parent_name,
 458                                 NULL)) {
 459                 return NT_STATUS_NO_MEMORY;
 460         }
 461
 462         DEBUG(10,("inherit_new_acl: check directory %s\n",
 463                         parent_name));
 464
 465         status = get_nt_acl_tdb_internal(handle,
 466                                         NULL,
 467                                         parent_name,
 468                                         (OWNER_SECURITY_INFORMATION |
 469                                          GROUP_SECURITY_INFORMATION |
 470                                          DACL_SECURITY_INFORMATION),
 471                                         &parent_desc);
 472         if (NT_STATUS_IS_OK(status)) {
 473                 /* Create an inherited descriptor from the parent. */
 474
 475                 if (DEBUGLEVEL >= 10) {
 476                         DEBUG(10,("inherit_new_acl: parent acl is:\n"));
 477                         NDR_PRINT_DEBUG(security_descriptor, parent_desc);
 478                 }
 479
 480                 status = se_create_child_secdesc(ctx,
 481                                 &psd,
 482                                 &size,
 483                                 parent_desc,
 484                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
 485                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
 486                                 container);
 487                 if (!NT_STATUS_IS_OK(status)) {
 488                         return status;
 489                 }
 490
 491                 if (DEBUGLEVEL >= 10) {
 492                         DEBUG(10,("inherit_new_acl: child acl is:\n"));
 493                         NDR_PRINT_DEBUG(security_descriptor, psd);
 494                 }
 495
 496         } else {
 497                 DEBUG(10,("inherit_new_acl: directory %s failed "
 498                         "to get acl %s\n",
 499                         parent_name,
 500                         nt_errstr(status) ));
 501         }
 502
 503         if (!psd || psd->dacl == NULL) {
 504                 SMB_STRUCT_STAT sbuf;
 505                 int ret;
 506
 507                 TALLOC_FREE(psd);
 508                 if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
 509                         ret = SMB_VFS_FSTAT(fsp, &sbuf);
 510                 } else {
 511                         if (fsp && fsp->posix_open) {
 512                                 ret = SMB_VFS_LSTAT(handle->conn,fname, &sbuf);
 513                         } else {
 514                                 ret = SMB_VFS_STAT(handle->conn,fname, &sbuf);
 515                         }
 516                 }
 517                 if (ret == -1) {
 518                         return map_nt_error_from_unix(errno);
 519                 }
 520                 psd = default_file_sd(ctx, &sbuf);
 521                 if (!psd) {
 522                         return NT_STATUS_NO_MEMORY;
 523                 }
 524
 525                 if (DEBUGLEVEL >= 10) {
 526                         DEBUG(10,("inherit_new_acl: default acl is:\n"));
 527                         NDR_PRINT_DEBUG(security_descriptor, psd);
 528                 }
 529         }
 530
 531         status = create_acl_blob(psd, &blob);
 532         if (!NT_STATUS_IS_OK(status)) {
 533                 return status;
 534         }
 535         if (fsp) {
 536                 return store_acl_blob_fsp(handle, fsp, &blob);
 537         } else {
 538                 return store_acl_blob_pathname(handle, fname, &blob);
 539         }
 540 }
 541
 542 /*********************************************************************
 543  Check ACL on open. For new files inherit from parent directory.
 544 *********************************************************************/
 545
 546 static int open_acl_tdb(vfs_handle_struct *handle,
 547                                         const char *fname,
 548                                         files_struct *fsp,
 549                                         int flags,
 550                                         mode_t mode)
 551 {
 552         uint32_t access_granted = 0;
 553         struct security_descriptor *pdesc = NULL;
 554         bool file_existed = true;
 555         NTSTATUS status = get_nt_acl_tdb_internal(handle,
 556                                         NULL,
 557                                         fname,
 558                                         (OWNER_SECURITY_INFORMATION |
 559                                          GROUP_SECURITY_INFORMATION |
 560                                          DACL_SECURITY_INFORMATION),
 561                                         &pdesc);
 562         if (NT_STATUS_IS_OK(status)) {
 563                 /* See if we can access it. */
 564                 status = smb1_file_se_access_check(pdesc,
 565                                         handle->conn->server_info->ptok,
 566                                         fsp->access_mask,
 567                                         &access_granted);
 568                 if (!NT_STATUS_IS_OK(status)) {
 569                         DEBUG(10,("open_acl_tdb: file %s open "
 570                                 "refused with error %s\n",
 571                                 fname,
 572                                 nt_errstr(status) ));
 573                         errno = map_errno_from_nt_status(status);
 574                         return -1;
 575                 }
 576         } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 577                 file_existed = false;
 578         }
 579
 580         DEBUG(10,("open_acl_tdb: get_nt_acl_attr_internal for "
 581                 "file %s returned %s\n",
 582                 fname,
 583                 nt_errstr(status) ));
 584
 585         fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
 586
 587         if (!file_existed && fsp->fh->fd != -1) {
 588                 /* File was created. Inherit from parent directory. */
 589                 string_set(&fsp->fsp_name, fname);
 590                 inherit_new_acl(handle, fname, fsp, false);
 591         }
 592
 593         return fsp->fh->fd;
 594 }
 595
 596 /*********************************************************************
 597  On unlink we need to delete the tdb record (if using tdb).
 598 *********************************************************************/
 599
 600 static int unlink_acl_tdb(vfs_handle_struct *handle, const char *path)
 601 {
 602         SMB_STRUCT_STAT sbuf;
 603         struct db_context *db;
 604         int ret = -1;
 605
 606         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 607
 608         if (lp_posix_pathnames()) {
 609                 ret = SMB_VFS_LSTAT(handle->conn, path, &sbuf);
 610         } else {
 611                 ret = SMB_VFS_STAT(handle->conn, path, &sbuf);
 612         }
 613
 614         if (ret == -1) {
 615                 return -1;
 616         }
 617
 618         ret = SMB_VFS_NEXT_UNLINK(handle, path);
 619
 620         if (ret == -1) {
 621                 return -1;
 622         }
 623
 624         acl_tdb_delete(handle, db, &sbuf);
 625         return 0;
 626 }
 627
 628 /*********************************************************************
 629  Store an inherited SD on mkdir.
 630 *********************************************************************/
 631
 632 static int mkdir_acl_tdb(vfs_handle_struct *handle, const char *path, mode_t mode)
 633 {
 634         int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 635
 636         if (ret == -1) {
 637                 return ret;
 638         }
 639         /* New directory - inherit from parent. */
 640         inherit_new_acl(handle, path, NULL, true);
 641         return ret;
 642 }
 643
 644 /*********************************************************************
 645  On rmdir we need to delete the tdb record (if using tdb).
 646 *********************************************************************/
 647
 648 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
 649 {
 650
 651         SMB_STRUCT_STAT sbuf;
 652         struct db_context *db;
 653         int ret = -1;
 654
 655         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 656
 657         if (lp_posix_pathnames()) {
 658                 ret = SMB_VFS_LSTAT(handle->conn, path, &sbuf);
 659         } else {
 660                 ret = SMB_VFS_STAT(handle->conn, path, &sbuf);
 661         }
 662
 663         if (ret == -1) {
 664                 return -1;
 665         }
 666
 667         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 668         if (ret == -1) {
 669                 return -1;
 670         }
 671
 672         acl_tdb_delete(handle, db, &sbuf);
 673         return 0;
 674 }
 675
 676 /*********************************************************************
 677  Fetch a security descriptor given an fsp.
 678 *********************************************************************/
 679
 680 static NTSTATUS fget_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 681         uint32 security_info, struct security_descriptor **ppdesc)
 682 {
 683         NTSTATUS status = get_nt_acl_tdb_internal(handle, fsp,
 684                                 NULL, security_info, ppdesc);
 685         if (NT_STATUS_IS_OK(status)) {
 686                 if (DEBUGLEVEL >= 10) {
 687                         DEBUG(10,("fget_nt_acl_tdb: returning tdb sd for file %s\n",
 688                                 fsp->fsp_name));
 689                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 690                 }
 691                 return NT_STATUS_OK;
 692         }
 693
 694         DEBUG(10,("fget_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 695                         fsp->fsp_name,
 696                         nt_errstr(status) ));
 697
 698         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
 699                         security_info, ppdesc);
 700 }
 701
 702 /*********************************************************************
 703  Fetch a security descriptor given a pathname.
 704 *********************************************************************/
 705
 706 static NTSTATUS get_nt_acl_tdb(vfs_handle_struct *handle,
 707         const char *name, uint32 security_info, struct security_descriptor **ppdesc)
 708 {
 709         NTSTATUS status = get_nt_acl_tdb_internal(handle, NULL,
 710                                 name, security_info, ppdesc);
 711         if (NT_STATUS_IS_OK(status)) {
 712                 if (DEBUGLEVEL >= 10) {
 713                         DEBUG(10,("get_nt_acl_tdb: returning tdb sd for file %s\n",
 714                                 name));
 715                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 716                 }
 717                 return NT_STATUS_OK;
 718         }
 719
 720         DEBUG(10,("get_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 721                         name,
 722                         nt_errstr(status) ));
 723
 724         return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
 725                         security_info, ppdesc);
 726 }
 727
 728 /*********************************************************************
 729  Store a security descriptor given an fsp.
 730 *********************************************************************/
 731
 732 static NTSTATUS fset_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 733         uint32 security_info_sent, const struct security_descriptor *psd)
 734 {
 735         NTSTATUS status;
 736         DATA_BLOB blob;
 737
 738         if (DEBUGLEVEL >= 10) {
 739                 DEBUG(10,("fset_nt_acl_tdb: incoming sd for file %s\n",
 740                         fsp->fsp_name));
 741                 NDR_PRINT_DEBUG(security_descriptor,
 742                         CONST_DISCARD(struct security_descriptor *,psd));
 743         }
 744
 745         status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 746         if (!NT_STATUS_IS_OK(status)) {
 747                 return status;
 748         }
 749
 750         /* Ensure owner and group are set. */
 751         if (!psd->owner_sid || !psd->group_sid) {
 752                 int ret;
 753                 SMB_STRUCT_STAT sbuf;
 754                 DOM_SID owner_sid, group_sid;
 755                 struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
 756
 757                 if (!nc_psd) {
 758                         return NT_STATUS_OK;
 759                 }
 760                 if (fsp->is_directory || fsp->fh->fd == -1) {
 761                         if (fsp->posix_open) {
 762                                 ret = SMB_VFS_LSTAT(fsp->conn,fsp->fsp_name, &sbuf);
 763                         } else {
 764                                 ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
 765                         }
 766                 } else {
 767                         ret = SMB_VFS_FSTAT(fsp, &sbuf);
 768                 }
 769                 if (ret == -1) {
 770                         /* Lower level acl set succeeded,
 771                          * so still return OK. */
 772                         return NT_STATUS_OK;
 773                 }
 774                 create_file_sids(&sbuf, &owner_sid, &group_sid);
 775                 /* This is safe as nc_psd is discarded at fn exit. */
 776                 nc_psd->owner_sid = &owner_sid;
 777                 nc_psd->group_sid = &group_sid;
 778                 security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
 779                 psd = nc_psd;
 780         }
 781
 782 #if 0
 783         if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
 784                         psd->dacl != NULL &&
 785                         (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
 786                                 SE_DESC_DACL_AUTO_INHERIT_REQ))==
 787                                 (SE_DESC_DACL_AUTO_INHERITED|
 788                                 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
 789                 struct security_descriptor *new_psd = NULL;
 790                 status = append_parent_acl(fsp, psd, &new_psd);
 791                 if (!NT_STATUS_IS_OK(status)) {
 792                         /* Lower level acl set succeeded,
 793                          * so still return OK. */
 794                         return NT_STATUS_OK;
 795                 }
 796                 psd = new_psd;
 797         }
 798 #endif
 799
 800         if (DEBUGLEVEL >= 10) {
 801                 DEBUG(10,("fset_nt_acl_tdb: storing tdb sd for file %s\n",
 802                         fsp->fsp_name));
 803                 NDR_PRINT_DEBUG(security_descriptor,
 804                         CONST_DISCARD(struct security_descriptor *,psd));
 805         }
 806         create_acl_blob(psd, &blob);
 807         store_acl_blob_fsp(handle, fsp, &blob);
 808
 809         return NT_STATUS_OK;
 810 }
 811
 812 /*******************************************************************
 813  Handle opening the storage tdb if so configured.
 814 *******************************************************************/
 815
 816 static int connect_acl_tdb(struct vfs_handle_struct *handle,
 817                                 const char *service,
 818                                 const char *user)
 819 {
 820         struct db_context *db;
 821         int res;
 822
 823         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 824         if (res < 0) {
 825                 return res;
 826         }
 827
 828         if (!acl_tdb_init(&db)) {
 829                 SMB_VFS_NEXT_DISCONNECT(handle);
 830                 return -1;
 831         }
 832
 833         SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_tdb_data,
 834                                 struct db_context, return -1);
 835
 836         return 0;
 837 }
 838
 839 /*********************************************************************
 840  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 841 *********************************************************************/
 842
 843 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
 844                               const char *path,
 845                               SMB_ACL_TYPE_T type,
 846                               SMB_ACL_T theacl)
 847 {
 848         SMB_STRUCT_STAT sbuf;
 849         struct db_context *db;
 850         int ret = -1;
 851
 852         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 853
 854         if (lp_posix_pathnames()) {
 855                 ret = SMB_VFS_LSTAT(handle->conn, path, &sbuf);
 856         } else {
 857                 ret = SMB_VFS_STAT(handle->conn, path, &sbuf);
 858         }
 859
 860         if (ret == -1) {
 861                 return -1;
 862         }
 863
 864         ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
 865                                                 path,
 866                                                 type,
 867                                                 theacl);
 868         if (ret == -1) {
 869                 return -1;
 870         }
 871
 872         acl_tdb_delete(handle, db, &sbuf);
 873         return 0;
 874 }
 875
 876 /*********************************************************************
 877  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 878 *********************************************************************/
 879
 880 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
 881                             files_struct *fsp,
 882                             SMB_ACL_T theacl)
 883 {
 884         SMB_STRUCT_STAT sbuf;
 885         struct db_context *db;
 886         int ret;
 887
 888         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 889
 890         if (fsp->is_directory || fsp->fh->fd == -1) {
 891                 if (fsp->posix_open) {
 892                         ret = SMB_VFS_LSTAT(fsp->conn,fsp->fsp_name, &sbuf);
 893                 } else {
 894                         ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
 895                 }
 896         } else {
 897                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 898         }
 899         if (ret == -1) {
 900                 return -1;
 901         }
 902
 903         ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
 904                                                 fsp,
 905                                                 theacl);
 906         if (ret == -1) {
 907                 return -1;
 908         }
 909
 910         acl_tdb_delete(handle, db, &sbuf);
 911         return 0;
 912 }
 913
 914 /* VFS operations structure */
 915
 916 static vfs_op_tuple skel_op_tuples[] =
 917 {
 918         {SMB_VFS_OP(connect_acl_tdb), SMB_VFS_OP_CONNECT,  SMB_VFS_LAYER_TRANSPARENT},
 919
 920         {SMB_VFS_OP(mkdir_acl_tdb), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
 921         {SMB_VFS_OP(rmdir_acl_tdb), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
 922
 923         {SMB_VFS_OP(open_acl_tdb),  SMB_VFS_OP_OPEN,  SMB_VFS_LAYER_TRANSPARENT},
 924         {SMB_VFS_OP(unlink_acl_tdb), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
 925
 926         /* NT File ACL operations */
 927
 928         {SMB_VFS_OP(fget_nt_acl_tdb),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 929         {SMB_VFS_OP(get_nt_acl_tdb), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
 930         {SMB_VFS_OP(fset_nt_acl_tdb),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 931
 932         /* POSIX ACL operations. */
 933         {SMB_VFS_OP(sys_acl_set_file_tdb), SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
 934         {SMB_VFS_OP(sys_acl_set_fd_tdb), SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
 935
 936         {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
 937 };
 938
 939 NTSTATUS vfs_acl_tdb_init(void)
 940 {
 941         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb", skel_op_tuples);
 942 }