source3/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         char *dbname;
  40
  41         if (acl_db) {
  42                 *pp_db = acl_db;
  43                 ref_count++;
  44                 return true;
  45         }
  46
  47         dbname = state_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                 TALLOC_FREE(dbname);
  65                 return false;
  66         }
  67
  68         ref_count++;
  69         TALLOC_FREE(dbname);
  70         return true;
  71 }
  72
  73 /*******************************************************************
  74  Lower ref count and close acl_db if zero.
  75 *******************************************************************/
  76
  77 static void free_acl_tdb_data(void **pptr)
  78 {
  79         struct db_context **pp_db = (struct db_context **)pptr;
  80
  81         ref_count--;
  82         if (ref_count == 0) {
  83                 TALLOC_FREE(*pp_db);
  84                 acl_db = NULL;
  85         }
  86 }
  87
  88 /*******************************************************************
  89  Fetch_lock the tdb acl record for a file
  90 *******************************************************************/
  91
  92 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
  93                                         struct db_context *db,
  94                                         const struct file_id *id)
  95 {
  96         uint8 id_buf[16];
  97
  98         /* For backwards compatibility only store the dev/inode. */
  99         push_file_id_16((char *)id_buf, id);
 100         return db->fetch_locked(db,
 101                                 mem_ctx,
 102                                 make_tdb_data(id_buf,
 103                                         sizeof(id_buf)));
 104 }
 105
 106 /*******************************************************************
 107  Delete the tdb acl record for a file
 108 *******************************************************************/
 109
 110 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
 111                                 struct db_context *db,
 112                                 SMB_STRUCT_STAT *psbuf)
 113 {
 114         NTSTATUS status;
 115         struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
 116         struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
 117
 118         /*
 119          * If rec == NULL there's not much we can do about it
 120          */
 121
 122         if (rec == NULL) {
 123                 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
 124                 TALLOC_FREE(rec);
 125                 return NT_STATUS_OK;
 126         }
 127
 128         status = rec->delete_rec(rec);
 129         TALLOC_FREE(rec);
 130         return status;
 131 }
 132
 133 /*******************************************************************
 134  Parse out a struct security_descriptor from a DATA_BLOB.
 135 *******************************************************************/
 136
 137 static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
 138                                 uint32 security_info,
 139                                 struct security_descriptor **ppdesc)
 140 {
 141         TALLOC_CTX *ctx = talloc_tos();
 142         struct xattr_NTACL xacl;
 143         enum ndr_err_code ndr_err;
 144         size_t sd_size;
 145
 146         ndr_err = ndr_pull_struct_blob(pblob, ctx, NULL, &xacl,
 147                         (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
 148
 149         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 150                 DEBUG(5, ("parse_acl_blob: ndr_pull_xattr_NTACL failed: %s\n",
 151                         ndr_errstr(ndr_err)));
 152                 return ndr_map_error2ntstatus(ndr_err);;
 153         }
 154
 155         if (xacl.version != 2) {
 156                 return NT_STATUS_REVISION_MISMATCH;
 157         }
 158
 159         *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_hs->sd->type | SEC_DESC_SELF_RELATIVE,
 160                         (security_info & OWNER_SECURITY_INFORMATION)
 161                         ? xacl.info.sd_hs->sd->owner_sid : NULL,
 162                         (security_info & GROUP_SECURITY_INFORMATION)
 163                         ? xacl.info.sd_hs->sd->group_sid : NULL,
 164                         (security_info & SACL_SECURITY_INFORMATION)
 165                         ? xacl.info.sd_hs->sd->sacl : NULL,
 166                         (security_info & DACL_SECURITY_INFORMATION)
 167                         ? xacl.info.sd_hs->sd->dacl : NULL,
 168                         &sd_size);
 169
 170         TALLOC_FREE(xacl.info.sd);
 171
 172         return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
 173 }
 174
 175 /*******************************************************************
 176  Pull a security descriptor into a DATA_BLOB from a tdb store.
 177 *******************************************************************/
 178
 179 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
 180                         vfs_handle_struct *handle,
 181                         files_struct *fsp,
 182                         const char *name,
 183                         DATA_BLOB *pblob)
 184 {
 185         uint8 id_buf[16];
 186         TDB_DATA data;
 187         struct file_id id;
 188         struct db_context *db;
 189         int ret = -1;
 190         SMB_STRUCT_STAT sbuf;
 191
 192         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 193                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 194
 195         if (fsp && fsp->fh->fd != -1) {
 196                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 197         } else {
 198                 if (fsp && fsp->posix_open) {
 199                         ret = vfs_lstat_smb_fname(handle->conn, name, &sbuf);
 200                 } else {
 201                         ret = vfs_stat_smb_fname(handle->conn, name, &sbuf);
 202                 }
 203         }
 204
 205         if (ret == -1) {
 206                 return map_nt_error_from_unix(errno);
 207         }
 208
 209         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 210
 211         /* For backwards compatibility only store the dev/inode. */
 212         push_file_id_16((char *)id_buf, &id);
 213
 214         if (db->fetch(db,
 215                         ctx,
 216                         make_tdb_data(id_buf, sizeof(id_buf)),
 217                         &data) == -1) {
 218                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 219         }
 220
 221         pblob->data = data.dptr;
 222         pblob->length = data.dsize;
 223
 224         DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
 225                 (unsigned int)data.dsize, name ));
 226
 227         if (pblob->length == 0 || pblob->data == NULL) {
 228                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 229         }
 230         return NT_STATUS_OK;
 231 }
 232
 233 /*******************************************************************
 234  Create a DATA_BLOB from a security descriptor.
 235 *******************************************************************/
 236
 237 static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
 238 {
 239         struct xattr_NTACL xacl;
 240         struct security_descriptor_hash sd_hs;
 241         enum ndr_err_code ndr_err;
 242         TALLOC_CTX *ctx = talloc_tos();
 243
 244         ZERO_STRUCT(xacl);
 245         ZERO_STRUCT(sd_hs);
 246
 247         xacl.version = 2;
 248         xacl.info.sd_hs = &sd_hs;
 249         xacl.info.sd_hs->sd = CONST_DISCARD(struct security_descriptor *, psd);
 250         memset(&xacl.info.sd_hs->hash[0], '\0', 16);
 251
 252         ndr_err = ndr_push_struct_blob(
 253                         pblob, ctx, NULL, &xacl,
 254                         (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
 255
 256         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 257                 DEBUG(5, ("create_acl_blob: ndr_push_xattr_NTACL failed: %s\n",
 258                         ndr_errstr(ndr_err)));
 259                 return ndr_map_error2ntstatus(ndr_err);;
 260         }
 261
 262         return NT_STATUS_OK;
 263 }
 264
 265 /*******************************************************************
 266  Store a DATA_BLOB into a tdb record given an fsp pointer.
 267 *******************************************************************/
 268
 269 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
 270                                 files_struct *fsp,
 271                                 DATA_BLOB *pblob)
 272 {
 273         uint8 id_buf[16];
 274         struct file_id id;
 275         TDB_DATA data;
 276         struct db_context *db;
 277         struct db_record *rec;
 278         int ret = -1;
 279
 280         DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
 281                   (unsigned int)pblob->length, fsp_str_dbg(fsp)));
 282
 283         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 284                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 285
 286         if (fsp->fh->fd != -1) {
 287                 ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
 288         } else {
 289                 if (fsp->posix_open) {
 290                         ret = SMB_VFS_LSTAT(handle->conn, fsp->fsp_name);
 291                 } else {
 292                         ret = SMB_VFS_STAT(handle->conn, fsp->fsp_name);
 293                 }
 294         }
 295
 296         if (ret == -1) {
 297                 return map_nt_error_from_unix(errno);
 298         }
 299
 300         id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
 301
 302         /* For backwards compatibility only store the dev/inode. */
 303         push_file_id_16((char *)id_buf, &id);
 304         rec = db->fetch_locked(db, talloc_tos(),
 305                                 make_tdb_data(id_buf,
 306                                         sizeof(id_buf)));
 307         if (rec == NULL) {
 308                 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
 309                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 310         }
 311         data.dptr = pblob->data;
 312         data.dsize = pblob->length;
 313         return rec->store(rec, data, 0);
 314 }
 315
 316 /*******************************************************************
 317  Store a DATA_BLOB into a tdb record given a pathname.
 318 *******************************************************************/
 319
 320 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
 321                                         const char *fname,
 322                                         DATA_BLOB *pblob)
 323 {
 324         uint8 id_buf[16];
 325         struct file_id id;
 326         TDB_DATA data;
 327         SMB_STRUCT_STAT sbuf;
 328         struct db_context *db;
 329         struct db_record *rec;
 330         int ret = -1;
 331
 332         DEBUG(10,("store_acl_blob_pathname: storing blob "
 333                         "length %u on file %s\n",
 334                         (unsigned int)pblob->length, fname));
 335
 336         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 337                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 338
 339         if (lp_posix_pathnames()) {
 340                 ret = vfs_lstat_smb_fname(handle->conn, fname, &sbuf);
 341         } else {
 342                 ret = vfs_stat_smb_fname(handle->conn, fname, &sbuf);
 343         }
 344
 345         if (ret == -1) {
 346                 return map_nt_error_from_unix(errno);
 347         }
 348
 349         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 350
 351         /* For backwards compatibility only store the dev/inode. */
 352         push_file_id_16((char *)id_buf, &id);
 353
 354         rec = db->fetch_locked(db, talloc_tos(),
 355                                 make_tdb_data(id_buf,
 356                                         sizeof(id_buf)));
 357         if (rec == NULL) {
 358                 DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
 359                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 360         }
 361         data.dptr = pblob->data;
 362         data.dsize = pblob->length;
 363         return rec->store(rec, data, 0);
 364 }
 365
 366 /*******************************************************************
 367  Store a DATA_BLOB into an tdb given a pathname.
 368 *******************************************************************/
 369
 370 static NTSTATUS get_nt_acl_tdb_internal(vfs_handle_struct *handle,
 371                                         files_struct *fsp,
 372                                         const char *name,
 373                                         uint32 security_info,
 374                                         struct security_descriptor **ppdesc)
 375 {
 376         TALLOC_CTX *ctx = talloc_tos();
 377         DATA_BLOB blob;
 378         NTSTATUS status;
 379
 380         if (fsp && name == NULL) {
 381                 name = fsp->fsp_name->base_name;
 382         }
 383
 384         DEBUG(10, ("get_nt_acl_tdb_internal: name=%s\n", name));
 385
 386         status = get_acl_blob(ctx, handle, fsp, name, &blob);
 387         if (!NT_STATUS_IS_OK(status)) {
 388                 DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
 389                 return status;
 390         }
 391
 392         status = parse_acl_blob(&blob, security_info, ppdesc);
 393         if (!NT_STATUS_IS_OK(status)) {
 394                 DEBUG(10, ("parse_acl_blob returned %s\n",
 395                                 nt_errstr(status)));
 396                 return status;
 397         }
 398
 399         TALLOC_FREE(blob.data);
 400         return status;
 401 }
 402
 403 /*********************************************************************
 404  Create a default security descriptor for a file in case no inheritance
 405  exists. All permissions to the owner and SYSTEM.
 406 *********************************************************************/
 407
 408 static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
 409                                                 SMB_STRUCT_STAT *psbuf)
 410 {
 411         struct dom_sid owner_sid, group_sid;
 412         size_t sd_size;
 413         struct security_ace *pace = NULL;
 414         struct security_acl *pacl = NULL;
 415
 416         uid_to_sid(&owner_sid, psbuf->st_ex_uid);
 417         gid_to_sid(&group_sid, psbuf->st_ex_gid);
 418
 419         pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
 420         if (!pace) {
 421                 return NULL;
 422         }
 423
 424         init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
 425                         SEC_RIGHTS_FILE_ALL, 0);
 426         init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
 427                         SEC_RIGHTS_FILE_ALL, 0);
 428
 429         pacl = make_sec_acl(mem_ctx,
 430                                 NT4_ACL_REVISION,
 431                                 2,
 432                                 pace);
 433         if (!pacl) {
 434                 return NULL;
 435         }
 436         return make_sec_desc(mem_ctx,
 437                         SECURITY_DESCRIPTOR_REVISION_1,
 438                         SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
 439                         &owner_sid,
 440                         &group_sid,
 441                         NULL,
 442                         pacl,
 443                         &sd_size);
 444 }
 445
 446 /*********************************************************************
 447 *********************************************************************/
 448
 449 static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
 450                                         struct smb_filename *smb_fname,
 451                                         files_struct *fsp,
 452                                         bool container)
 453 {
 454         TALLOC_CTX *ctx = talloc_tos();
 455         NTSTATUS status;
 456         struct security_descriptor *parent_desc = NULL;
 457         struct security_descriptor *psd = NULL;
 458         DATA_BLOB blob;
 459         size_t size;
 460         char *parent_name;
 461
 462         if (!parent_dirname(ctx, smb_fname->base_name, &parent_name, NULL)) {
 463                 return NT_STATUS_NO_MEMORY;
 464         }
 465
 466         DEBUG(10,("inherit_new_acl: check directory %s\n",
 467                         parent_name));
 468
 469         status = get_nt_acl_tdb_internal(handle,
 470                                         NULL,
 471                                         parent_name,
 472                                         (OWNER_SECURITY_INFORMATION |
 473                                          GROUP_SECURITY_INFORMATION |
 474                                          DACL_SECURITY_INFORMATION),
 475                                         &parent_desc);
 476         if (NT_STATUS_IS_OK(status)) {
 477                 /* Create an inherited descriptor from the parent. */
 478
 479                 if (DEBUGLEVEL >= 10) {
 480                         DEBUG(10,("inherit_new_acl: parent acl is:\n"));
 481                         NDR_PRINT_DEBUG(security_descriptor, parent_desc);
 482                 }
 483
 484                 status = se_create_child_secdesc(ctx,
 485                                 &psd,
 486                                 &size,
 487                                 parent_desc,
 488                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
 489                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
 490                                 container);
 491                 if (!NT_STATUS_IS_OK(status)) {
 492                         return status;
 493                 }
 494
 495                 if (DEBUGLEVEL >= 10) {
 496                         DEBUG(10,("inherit_new_acl: child acl is:\n"));
 497                         NDR_PRINT_DEBUG(security_descriptor, psd);
 498                 }
 499
 500         } else {
 501                 DEBUG(10,("inherit_new_acl: directory %s failed "
 502                         "to get acl %s\n",
 503                         parent_name,
 504                         nt_errstr(status) ));
 505         }
 506
 507         if (!psd || psd->dacl == NULL) {
 508                 int ret;
 509
 510                 TALLOC_FREE(psd);
 511                 if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
 512                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
 513                 } else {
 514                         if (fsp && fsp->posix_open) {
 515                                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname);
 516                         } else {
 517                                 ret = SMB_VFS_STAT(handle->conn, smb_fname);
 518                         }
 519                 }
 520                 if (ret == -1) {
 521                         return map_nt_error_from_unix(errno);
 522                 }
 523                 psd = default_file_sd(ctx, &smb_fname->st);
 524                 if (!psd) {
 525                         return NT_STATUS_NO_MEMORY;
 526                 }
 527
 528                 if (DEBUGLEVEL >= 10) {
 529                         DEBUG(10,("inherit_new_acl: default acl is:\n"));
 530                         NDR_PRINT_DEBUG(security_descriptor, psd);
 531                 }
 532         }
 533
 534         status = create_acl_blob(psd, &blob);
 535         if (!NT_STATUS_IS_OK(status)) {
 536                 return status;
 537         }
 538         if (fsp) {
 539                 return store_acl_blob_fsp(handle, fsp, &blob);
 540         } else {
 541                 return store_acl_blob_pathname(handle, smb_fname->base_name,
 542                                                &blob);
 543         }
 544 }
 545
 546 /*********************************************************************
 547  Check ACL on open. For new files inherit from parent directory.
 548 *********************************************************************/
 549
 550 static int open_acl_tdb(vfs_handle_struct *handle,
 551                                         struct smb_filename *smb_fname,
 552                                         files_struct *fsp,
 553                                         int flags,
 554                                         mode_t mode)
 555 {
 556         uint32_t access_granted = 0;
 557         struct security_descriptor *pdesc = NULL;
 558         bool file_existed = true;
 559         NTSTATUS status;
 560
 561         status = get_nt_acl_tdb_internal(handle,
 562                                         NULL,
 563                                         smb_fname->base_name,
 564                                         (OWNER_SECURITY_INFORMATION |
 565                                          GROUP_SECURITY_INFORMATION |
 566                                          DACL_SECURITY_INFORMATION),
 567                                         &pdesc);
 568         if (NT_STATUS_IS_OK(status)) {
 569                 /* See if we can access it. */
 570                 status = smb1_file_se_access_check(pdesc,
 571                                         handle->conn->server_info->ptok,
 572                                         fsp->access_mask,
 573                                         &access_granted);
 574                 if (!NT_STATUS_IS_OK(status)) {
 575                         DEBUG(10,("open_acl_tdb: file %s open "
 576                                 "refused with error %s\n",
 577                                 smb_fname_str_dbg(smb_fname),
 578                                 nt_errstr(status) ));
 579                         errno = map_errno_from_nt_status(status);
 580                         return -1;
 581                 }
 582         } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 583                 file_existed = false;
 584         }
 585
 586         DEBUG(10,("open_acl_tdb: get_nt_acl_attr_internal for "
 587                 "file %s returned %s\n",
 588                 smb_fname_str_dbg(smb_fname),
 589                 nt_errstr(status) ));
 590
 591         fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 592
 593         if (!file_existed && fsp->fh->fd != -1) {
 594                 /* File was created. Inherit from parent directory. */
 595                 status = fsp_set_smb_fname(fsp, smb_fname);
 596                 if (!NT_STATUS_IS_OK(status)) {
 597                         errno = map_errno_from_nt_status(status);
 598                         return -1;
 599                 }
 600                 inherit_new_acl(handle, smb_fname, fsp, false);
 601         }
 602         return fsp->fh->fd;
 603 }
 604
 605 /*********************************************************************
 606  On unlink we need to delete the tdb record (if using tdb).
 607 *********************************************************************/
 608
 609 static int unlink_acl_tdb(vfs_handle_struct *handle,
 610                           const struct smb_filename *smb_fname)
 611 {
 612         struct smb_filename *smb_fname_tmp = NULL;
 613         struct db_context *db;
 614         NTSTATUS status;
 615         int ret = -1;
 616
 617         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 618
 619         status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
 620         if (!NT_STATUS_IS_OK(status)) {
 621                 errno = map_errno_from_nt_status(status);
 622                 goto out;
 623         }
 624
 625         if (lp_posix_pathnames()) {
 626                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
 627         } else {
 628                 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
 629         }
 630
 631         if (ret == -1) {
 632                 goto out;
 633         }
 634
 635         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 636
 637         if (ret == -1) {
 638                 goto out;
 639         }
 640
 641         acl_tdb_delete(handle, db, &smb_fname_tmp->st);
 642  out:
 643         return ret;
 644 }
 645
 646 /*********************************************************************
 647  Store an inherited SD on mkdir.
 648 *********************************************************************/
 649
 650 static int mkdir_acl_tdb(vfs_handle_struct *handle, const char *path, mode_t mode)
 651 {
 652         struct smb_filename *smb_fname = NULL;
 653         int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 654         NTSTATUS status;
 655
 656         if (ret == -1) {
 657                 return ret;
 658         }
 659
 660         status = create_synthetic_smb_fname(talloc_tos(), path, NULL, NULL,
 661                                             &smb_fname);
 662         if (!NT_STATUS_IS_OK(status)) {
 663                 errno = map_errno_from_nt_status(status);
 664                 return -1;
 665         }
 666
 667         /* New directory - inherit from parent. */
 668         inherit_new_acl(handle, smb_fname, NULL, true);
 669         TALLOC_FREE(smb_fname);
 670         return ret;
 671 }
 672
 673 /*********************************************************************
 674  On rmdir we need to delete the tdb record (if using tdb).
 675 *********************************************************************/
 676
 677 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
 678 {
 679
 680         SMB_STRUCT_STAT sbuf;
 681         struct db_context *db;
 682         int ret = -1;
 683
 684         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 685
 686         if (lp_posix_pathnames()) {
 687                 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
 688         } else {
 689                 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
 690         }
 691
 692         if (ret == -1) {
 693                 return -1;
 694         }
 695
 696         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 697         if (ret == -1) {
 698                 return -1;
 699         }
 700
 701         acl_tdb_delete(handle, db, &sbuf);
 702         return 0;
 703 }
 704
 705 /*********************************************************************
 706  Fetch a security descriptor given an fsp.
 707 *********************************************************************/
 708
 709 static NTSTATUS fget_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 710         uint32 security_info, struct security_descriptor **ppdesc)
 711 {
 712         NTSTATUS status = get_nt_acl_tdb_internal(handle, fsp,
 713                                 NULL, security_info, ppdesc);
 714         if (NT_STATUS_IS_OK(status)) {
 715                 if (DEBUGLEVEL >= 10) {
 716                         DEBUG(10,("fget_nt_acl_tdb: returning tdb sd for file %s\n",
 717                                   fsp_str_dbg(fsp)));
 718                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 719                 }
 720                 return NT_STATUS_OK;
 721         }
 722
 723         DEBUG(10,("fget_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 724                   fsp_str_dbg(fsp), nt_errstr(status)));
 725
 726         return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
 727                         security_info, ppdesc);
 728 }
 729
 730 /*********************************************************************
 731  Fetch a security descriptor given a pathname.
 732 *********************************************************************/
 733
 734 static NTSTATUS get_nt_acl_tdb(vfs_handle_struct *handle,
 735         const char *name, uint32 security_info, struct security_descriptor **ppdesc)
 736 {
 737         NTSTATUS status = get_nt_acl_tdb_internal(handle, NULL,
 738                                 name, security_info, ppdesc);
 739         if (NT_STATUS_IS_OK(status)) {
 740                 if (DEBUGLEVEL >= 10) {
 741                         DEBUG(10,("get_nt_acl_tdb: returning tdb sd for file %s\n",
 742                                 name));
 743                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 744                 }
 745                 return NT_STATUS_OK;
 746         }
 747
 748         DEBUG(10,("get_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 749                         name,
 750                         nt_errstr(status) ));
 751
 752         return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
 753                         security_info, ppdesc);
 754 }
 755
 756 /*********************************************************************
 757  Store a security descriptor given an fsp.
 758 *********************************************************************/
 759
 760 static NTSTATUS fset_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 761         uint32 security_info_sent, const struct security_descriptor *psd)
 762 {
 763         NTSTATUS status;
 764         DATA_BLOB blob;
 765
 766         if (DEBUGLEVEL >= 10) {
 767                 DEBUG(10,("fset_nt_acl_tdb: incoming sd for file %s\n",
 768                           fsp_str_dbg(fsp)));
 769                 NDR_PRINT_DEBUG(security_descriptor,
 770                         CONST_DISCARD(struct security_descriptor *,psd));
 771         }
 772
 773         status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
 774         if (!NT_STATUS_IS_OK(status)) {
 775                 return status;
 776         }
 777
 778         /* Ensure owner and group are set. */
 779         if (!psd->owner_sid || !psd->group_sid) {
 780                 int ret;
 781                 DOM_SID owner_sid, group_sid;
 782                 struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
 783
 784                 if (!nc_psd) {
 785                         return NT_STATUS_OK;
 786                 }
 787                 if (fsp->is_directory || fsp->fh->fd == -1) {
 788                         if (fsp->posix_open) {
 789                                 ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
 790                         } else {
 791                                 ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
 792                         }
 793                 } else {
 794                         ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
 795                 }
 796                 if (ret == -1) {
 797                         /* Lower level acl set succeeded,
 798                          * so still return OK. */
 799                         return NT_STATUS_OK;
 800                 }
 801                 create_file_sids(&fsp->fsp_name->st, &owner_sid, &group_sid);
 802                 /* This is safe as nc_psd is discarded at fn exit. */
 803                 nc_psd->owner_sid = &owner_sid;
 804                 nc_psd->group_sid = &group_sid;
 805                 security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
 806                 psd = nc_psd;
 807         }
 808
 809 #if 0
 810         if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
 811                         psd->dacl != NULL &&
 812                         (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
 813                                 SE_DESC_DACL_AUTO_INHERIT_REQ))==
 814                                 (SE_DESC_DACL_AUTO_INHERITED|
 815                                 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
 816                 struct security_descriptor *new_psd = NULL;
 817                 status = append_parent_acl(fsp, psd, &new_psd);
 818                 if (!NT_STATUS_IS_OK(status)) {
 819                         /* Lower level acl set succeeded,
 820                          * so still return OK. */
 821                         return NT_STATUS_OK;
 822                 }
 823                 psd = new_psd;
 824         }
 825 #endif
 826
 827         if (DEBUGLEVEL >= 10) {
 828                 DEBUG(10,("fset_nt_acl_tdb: storing tdb sd for file %s\n",
 829                           fsp_str_dbg(fsp)));
 830                 NDR_PRINT_DEBUG(security_descriptor,
 831                         CONST_DISCARD(struct security_descriptor *,psd));
 832         }
 833         create_acl_blob(psd, &blob);
 834         store_acl_blob_fsp(handle, fsp, &blob);
 835
 836         return NT_STATUS_OK;
 837 }
 838
 839 /*******************************************************************
 840  Handle opening the storage tdb if so configured.
 841 *******************************************************************/
 842
 843 static int connect_acl_tdb(struct vfs_handle_struct *handle,
 844                                 const char *service,
 845                                 const char *user)
 846 {
 847         struct db_context *db;
 848         int res;
 849
 850         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 851         if (res < 0) {
 852                 return res;
 853         }
 854
 855         if (!acl_tdb_init(&db)) {
 856                 SMB_VFS_NEXT_DISCONNECT(handle);
 857                 return -1;
 858         }
 859
 860         SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_tdb_data,
 861                                 struct db_context, return -1);
 862
 863         return 0;
 864 }
 865
 866 /*********************************************************************
 867  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 868 *********************************************************************/
 869
 870 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
 871                               const char *path,
 872                               SMB_ACL_TYPE_T type,
 873                               SMB_ACL_T theacl)
 874 {
 875         SMB_STRUCT_STAT sbuf;
 876         struct db_context *db;
 877         int ret = -1;
 878
 879         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 880
 881         if (lp_posix_pathnames()) {
 882                 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
 883         } else {
 884                 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
 885         }
 886
 887         if (ret == -1) {
 888                 return -1;
 889         }
 890
 891         ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
 892                                                 path,
 893                                                 type,
 894                                                 theacl);
 895         if (ret == -1) {
 896                 return -1;
 897         }
 898
 899         acl_tdb_delete(handle, db, &sbuf);
 900         return 0;
 901 }
 902
 903 /*********************************************************************
 904  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 905 *********************************************************************/
 906
 907 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
 908                             files_struct *fsp,
 909                             SMB_ACL_T theacl)
 910 {
 911         struct db_context *db;
 912         int ret;
 913
 914         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 915
 916         if (fsp->is_directory || fsp->fh->fd == -1) {
 917                 if (fsp->posix_open) {
 918                         ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
 919                 } else {
 920                         ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
 921                 }
 922         } else {
 923                 ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
 924         }
 925         if (ret == -1) {
 926                 return -1;
 927         }
 928
 929         ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
 930                                                 fsp,
 931                                                 theacl);
 932         if (ret == -1) {
 933                 return -1;
 934         }
 935
 936         acl_tdb_delete(handle, db, &fsp->fsp_name->st);
 937         return 0;
 938 }
 939
 940 /* VFS operations structure */
 941
 942 static vfs_op_tuple skel_op_tuples[] =
 943 {
 944         {SMB_VFS_OP(connect_acl_tdb), SMB_VFS_OP_CONNECT,  SMB_VFS_LAYER_TRANSPARENT},
 945
 946         {SMB_VFS_OP(mkdir_acl_tdb), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
 947         {SMB_VFS_OP(rmdir_acl_tdb), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
 948
 949         {SMB_VFS_OP(open_acl_tdb),  SMB_VFS_OP_OPEN,  SMB_VFS_LAYER_TRANSPARENT},
 950         {SMB_VFS_OP(unlink_acl_tdb), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
 951
 952         /* NT File ACL operations */
 953
 954         {SMB_VFS_OP(fget_nt_acl_tdb),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 955         {SMB_VFS_OP(get_nt_acl_tdb), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
 956         {SMB_VFS_OP(fset_nt_acl_tdb),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 957
 958         /* POSIX ACL operations. */
 959         {SMB_VFS_OP(sys_acl_set_file_tdb), SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
 960         {SMB_VFS_OP(sys_acl_set_fd_tdb), SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
 961
 962         {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
 963 };
 964
 965 NTSTATUS vfs_acl_tdb_init(void)
 966 {
 967         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb", skel_op_tuples);
 968 }