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         SMB_STRUCT_STAT sbuf;
 276         TDB_DATA data;
 277         struct db_context *db;
 278         struct db_record *rec;
 279         int ret = -1;
 280
 281         DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
 282                         (unsigned int)pblob->length, fsp->fsp_name));
 283
 284         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 285                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 286
 287         if (fsp->fh->fd != -1) {
 288                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 289         } else {
 290                 if (fsp->posix_open) {
 291                         ret = vfs_lstat_smb_fname(handle->conn, fsp->fsp_name,
 292                                                   &sbuf);
 293                 } else {
 294                         ret = vfs_stat_smb_fname(handle->conn, fsp->fsp_name,
 295                                                  &sbuf);
 296                 }
 297         }
 298
 299         if (ret == -1) {
 300                 return map_nt_error_from_unix(errno);
 301         }
 302
 303         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 304
 305         /* For backwards compatibility only store the dev/inode. */
 306         push_file_id_16((char *)id_buf, &id);
 307         rec = db->fetch_locked(db, talloc_tos(),
 308                                 make_tdb_data(id_buf,
 309                                         sizeof(id_buf)));
 310         if (rec == NULL) {
 311                 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
 312                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 313         }
 314         data.dptr = pblob->data;
 315         data.dsize = pblob->length;
 316         return rec->store(rec, data, 0);
 317 }
 318
 319 /*******************************************************************
 320  Store a DATA_BLOB into a tdb record given a pathname.
 321 *******************************************************************/
 322
 323 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
 324                                         const char *fname,
 325                                         DATA_BLOB *pblob)
 326 {
 327         uint8 id_buf[16];
 328         struct file_id id;
 329         TDB_DATA data;
 330         SMB_STRUCT_STAT sbuf;
 331         struct db_context *db;
 332         struct db_record *rec;
 333         int ret = -1;
 334
 335         DEBUG(10,("store_acl_blob_pathname: storing blob "
 336                         "length %u on file %s\n",
 337                         (unsigned int)pblob->length, fname));
 338
 339         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
 340                 return NT_STATUS_INTERNAL_DB_CORRUPTION);
 341
 342         if (lp_posix_pathnames()) {
 343                 ret = vfs_lstat_smb_fname(handle->conn, fname, &sbuf);
 344         } else {
 345                 ret = vfs_stat_smb_fname(handle->conn, fname, &sbuf);
 346         }
 347
 348         if (ret == -1) {
 349                 return map_nt_error_from_unix(errno);
 350         }
 351
 352         id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
 353
 354         /* For backwards compatibility only store the dev/inode. */
 355         push_file_id_16((char *)id_buf, &id);
 356
 357         rec = db->fetch_locked(db, talloc_tos(),
 358                                 make_tdb_data(id_buf,
 359                                         sizeof(id_buf)));
 360         if (rec == NULL) {
 361                 DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
 362                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 363         }
 364         data.dptr = pblob->data;
 365         data.dsize = pblob->length;
 366         return rec->store(rec, data, 0);
 367 }
 368
 369 /*******************************************************************
 370  Store a DATA_BLOB into an tdb given a pathname.
 371 *******************************************************************/
 372
 373 static NTSTATUS get_nt_acl_tdb_internal(vfs_handle_struct *handle,
 374                                         files_struct *fsp,
 375                                         const char *name,
 376                                         uint32 security_info,
 377                                         struct security_descriptor **ppdesc)
 378 {
 379         TALLOC_CTX *ctx = talloc_tos();
 380         DATA_BLOB blob;
 381         NTSTATUS status;
 382
 383         if (fsp && name == NULL) {
 384                 name = fsp->fsp_name;
 385         }
 386
 387         DEBUG(10, ("get_nt_acl_tdb_internal: name=%s\n", name));
 388
 389         status = get_acl_blob(ctx, handle, fsp, name, &blob);
 390         if (!NT_STATUS_IS_OK(status)) {
 391                 DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
 392                 return status;
 393         }
 394
 395         status = parse_acl_blob(&blob, security_info, ppdesc);
 396         if (!NT_STATUS_IS_OK(status)) {
 397                 DEBUG(10, ("parse_acl_blob returned %s\n",
 398                                 nt_errstr(status)));
 399                 return status;
 400         }
 401
 402         TALLOC_FREE(blob.data);
 403         return status;
 404 }
 405
 406 /*********************************************************************
 407  Create a default security descriptor for a file in case no inheritance
 408  exists. All permissions to the owner and SYSTEM.
 409 *********************************************************************/
 410
 411 static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
 412                                                 SMB_STRUCT_STAT *psbuf)
 413 {
 414         struct dom_sid owner_sid, group_sid;
 415         size_t sd_size;
 416         struct security_ace *pace = NULL;
 417         struct security_acl *pacl = NULL;
 418
 419         uid_to_sid(&owner_sid, psbuf->st_ex_uid);
 420         gid_to_sid(&group_sid, psbuf->st_ex_gid);
 421
 422         pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
 423         if (!pace) {
 424                 return NULL;
 425         }
 426
 427         init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
 428                         SEC_RIGHTS_FILE_ALL, 0);
 429         init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
 430                         SEC_RIGHTS_FILE_ALL, 0);
 431
 432         pacl = make_sec_acl(mem_ctx,
 433                                 NT4_ACL_REVISION,
 434                                 2,
 435                                 pace);
 436         if (!pacl) {
 437                 return NULL;
 438         }
 439         return make_sec_desc(mem_ctx,
 440                         SECURITY_DESCRIPTOR_REVISION_1,
 441                         SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
 442                         &owner_sid,
 443                         &group_sid,
 444                         NULL,
 445                         pacl,
 446                         &sd_size);
 447 }
 448
 449 /*********************************************************************
 450 *********************************************************************/
 451
 452 static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
 453                                         const char *fname,
 454                                         files_struct *fsp,
 455                                         bool container)
 456 {
 457         TALLOC_CTX *ctx = talloc_tos();
 458         NTSTATUS status;
 459         struct security_descriptor *parent_desc = NULL;
 460         struct security_descriptor *psd = NULL;
 461         DATA_BLOB blob;
 462         size_t size;
 463         char *parent_name;
 464
 465         if (!parent_dirname(ctx, fname, &parent_name, NULL)) {
 466                 return NT_STATUS_NO_MEMORY;
 467         }
 468
 469         DEBUG(10,("inherit_new_acl: check directory %s\n",
 470                         parent_name));
 471
 472         status = get_nt_acl_tdb_internal(handle,
 473                                         NULL,
 474                                         parent_name,
 475                                         (OWNER_SECURITY_INFORMATION |
 476                                          GROUP_SECURITY_INFORMATION |
 477                                          DACL_SECURITY_INFORMATION),
 478                                         &parent_desc);
 479         if (NT_STATUS_IS_OK(status)) {
 480                 /* Create an inherited descriptor from the parent. */
 481
 482                 if (DEBUGLEVEL >= 10) {
 483                         DEBUG(10,("inherit_new_acl: parent acl is:\n"));
 484                         NDR_PRINT_DEBUG(security_descriptor, parent_desc);
 485                 }
 486
 487                 status = se_create_child_secdesc(ctx,
 488                                 &psd,
 489                                 &size,
 490                                 parent_desc,
 491                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
 492                                 &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
 493                                 container);
 494                 if (!NT_STATUS_IS_OK(status)) {
 495                         return status;
 496                 }
 497
 498                 if (DEBUGLEVEL >= 10) {
 499                         DEBUG(10,("inherit_new_acl: child acl is:\n"));
 500                         NDR_PRINT_DEBUG(security_descriptor, psd);
 501                 }
 502
 503         } else {
 504                 DEBUG(10,("inherit_new_acl: directory %s failed "
 505                         "to get acl %s\n",
 506                         parent_name,
 507                         nt_errstr(status) ));
 508         }
 509
 510         if (!psd || psd->dacl == NULL) {
 511                 SMB_STRUCT_STAT sbuf;
 512                 int ret;
 513
 514                 TALLOC_FREE(psd);
 515                 if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
 516                         ret = SMB_VFS_FSTAT(fsp, &sbuf);
 517                 } else {
 518                         if (fsp && fsp->posix_open) {
 519                                 ret = vfs_lstat_smb_fname(handle->conn,fname,
 520                                                           &sbuf);
 521                         } else {
 522                                 ret = vfs_stat_smb_fname(handle->conn,fname,
 523                                                          &sbuf);
 524                         }
 525                 }
 526                 if (ret == -1) {
 527                         return map_nt_error_from_unix(errno);
 528                 }
 529                 psd = default_file_sd(ctx, &sbuf);
 530                 if (!psd) {
 531                         return NT_STATUS_NO_MEMORY;
 532                 }
 533
 534                 if (DEBUGLEVEL >= 10) {
 535                         DEBUG(10,("inherit_new_acl: default acl is:\n"));
 536                         NDR_PRINT_DEBUG(security_descriptor, psd);
 537                 }
 538         }
 539
 540         status = create_acl_blob(psd, &blob);
 541         if (!NT_STATUS_IS_OK(status)) {
 542                 return status;
 543         }
 544         if (fsp) {
 545                 return store_acl_blob_fsp(handle, fsp, &blob);
 546         } else {
 547                 return store_acl_blob_pathname(handle, fname, &blob);
 548         }
 549 }
 550
 551 /*********************************************************************
 552  Check ACL on open. For new files inherit from parent directory.
 553 *********************************************************************/
 554
 555 static int open_acl_tdb(vfs_handle_struct *handle,
 556                                         struct smb_filename *smb_fname,
 557                                         files_struct *fsp,
 558                                         int flags,
 559                                         mode_t mode)
 560 {
 561         uint32_t access_granted = 0;
 562         struct security_descriptor *pdesc = NULL;
 563         bool file_existed = true;
 564         char *fname = NULL;
 565         NTSTATUS status;
 566
 567         status = get_full_smb_filename(talloc_tos(), smb_fname,
 568                                        &fname);
 569         if (!NT_STATUS_IS_OK(status)) {
 570                 errno = map_errno_from_nt_status(status);
 571                 return -1;
 572         }
 573
 574         status = get_nt_acl_tdb_internal(handle,
 575                                         NULL,
 576                                         fname,
 577                                         (OWNER_SECURITY_INFORMATION |
 578                                          GROUP_SECURITY_INFORMATION |
 579                                          DACL_SECURITY_INFORMATION),
 580                                         &pdesc);
 581         if (NT_STATUS_IS_OK(status)) {
 582                 /* See if we can access it. */
 583                 status = smb1_file_se_access_check(pdesc,
 584                                         handle->conn->server_info->ptok,
 585                                         fsp->access_mask,
 586                                         &access_granted);
 587                 if (!NT_STATUS_IS_OK(status)) {
 588                         DEBUG(10,("open_acl_tdb: file %s open "
 589                                 "refused with error %s\n",
 590                                 smb_fname_str_dbg(smb_fname),
 591                                 nt_errstr(status) ));
 592                         errno = map_errno_from_nt_status(status);
 593                         return -1;
 594                 }
 595         } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 596                 file_existed = false;
 597         }
 598
 599         DEBUG(10,("open_acl_tdb: get_nt_acl_attr_internal for "
 600                 "file %s returned %s\n",
 601                 smb_fname_str_dbg(smb_fname),
 602                 nt_errstr(status) ));
 603
 604         fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 605
 606         if (!file_existed && fsp->fh->fd != -1) {
 607                 /* File was created. Inherit from parent directory. */
 608                 string_set(&fsp->fsp_name, fname);
 609                 inherit_new_acl(handle, fname, fsp, false);
 610         }
 611
 612         return fsp->fh->fd;
 613 }
 614
 615 /*********************************************************************
 616  On unlink we need to delete the tdb record (if using tdb).
 617 *********************************************************************/
 618
 619 static int unlink_acl_tdb(vfs_handle_struct *handle,
 620                           const struct smb_filename *smb_fname)
 621 {
 622         struct smb_filename *smb_fname_tmp = NULL;
 623         struct db_context *db;
 624         NTSTATUS status;
 625         int ret = -1;
 626
 627         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 628
 629         status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
 630         if (!NT_STATUS_IS_OK(status)) {
 631                 errno = map_errno_from_nt_status(status);
 632                 goto out;
 633         }
 634
 635         if (lp_posix_pathnames()) {
 636                 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
 637         } else {
 638                 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
 639         }
 640
 641         if (ret == -1) {
 642                 goto out;
 643         }
 644
 645         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 646
 647         if (ret == -1) {
 648                 goto out;
 649         }
 650
 651         acl_tdb_delete(handle, db, &smb_fname_tmp->st);
 652  out:
 653         return ret;
 654 }
 655
 656 /*********************************************************************
 657  Store an inherited SD on mkdir.
 658 *********************************************************************/
 659
 660 static int mkdir_acl_tdb(vfs_handle_struct *handle, const char *path, mode_t mode)
 661 {
 662         int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 663
 664         if (ret == -1) {
 665                 return ret;
 666         }
 667         /* New directory - inherit from parent. */
 668         inherit_new_acl(handle, path, NULL, true);
 669         return ret;
 670 }
 671
 672 /*********************************************************************
 673  On rmdir we need to delete the tdb record (if using tdb).
 674 *********************************************************************/
 675
 676 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
 677 {
 678
 679         SMB_STRUCT_STAT sbuf;
 680         struct db_context *db;
 681         int ret = -1;
 682
 683         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 684
 685         if (lp_posix_pathnames()) {
 686                 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
 687         } else {
 688                 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
 689         }
 690
 691         if (ret == -1) {
 692                 return -1;
 693         }
 694
 695         ret = SMB_VFS_NEXT_RMDIR(handle, path);
 696         if (ret == -1) {
 697                 return -1;
 698         }
 699
 700         acl_tdb_delete(handle, db, &sbuf);
 701         return 0;
 702 }
 703
 704 /*********************************************************************
 705  Fetch a security descriptor given an fsp.
 706 *********************************************************************/
 707
 708 static NTSTATUS fget_nt_acl_tdb(vfs_handle_struct *handle, files_struct *fsp,
 709         uint32 security_info, struct security_descriptor **ppdesc)
 710 {
 711         NTSTATUS status = get_nt_acl_tdb_internal(handle, fsp,
 712                                 NULL, security_info, ppdesc);
 713         if (NT_STATUS_IS_OK(status)) {
 714                 if (DEBUGLEVEL >= 10) {
 715                         DEBUG(10,("fget_nt_acl_tdb: returning tdb sd for file %s\n",
 716                                 fsp->fsp_name));
 717                         NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
 718                 }
 719                 return NT_STATUS_OK;
 720         }
 721
 722         DEBUG(10,("fget_nt_acl_tdb: failed to get tdb sd for file %s, Error %s\n",
 723                         fsp->fsp_name,
 724                         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->fsp_name));
 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                 SMB_STRUCT_STAT sbuf;
 782                 DOM_SID owner_sid, group_sid;
 783                 struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
 784
 785                 if (!nc_psd) {
 786                         return NT_STATUS_OK;
 787                 }
 788                 if (fsp->is_directory || fsp->fh->fd == -1) {
 789                         if (fsp->posix_open) {
 790                                 ret = vfs_lstat_smb_fname(fsp->conn,
 791                                                           fsp->fsp_name,
 792                                                           &sbuf);
 793                         } else {
 794                                 ret = vfs_stat_smb_fname(fsp->conn,
 795                                                          fsp->fsp_name,
 796                                                          &sbuf);
 797                         }
 798                 } else {
 799                         ret = SMB_VFS_FSTAT(fsp, &sbuf);
 800                 }
 801                 if (ret == -1) {
 802                         /* Lower level acl set succeeded,
 803                          * so still return OK. */
 804                         return NT_STATUS_OK;
 805                 }
 806                 create_file_sids(&sbuf, &owner_sid, &group_sid);
 807                 /* This is safe as nc_psd is discarded at fn exit. */
 808                 nc_psd->owner_sid = &owner_sid;
 809                 nc_psd->group_sid = &group_sid;
 810                 security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
 811                 psd = nc_psd;
 812         }
 813
 814 #if 0
 815         if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
 816                         psd->dacl != NULL &&
 817                         (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
 818                                 SE_DESC_DACL_AUTO_INHERIT_REQ))==
 819                                 (SE_DESC_DACL_AUTO_INHERITED|
 820                                 SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
 821                 struct security_descriptor *new_psd = NULL;
 822                 status = append_parent_acl(fsp, psd, &new_psd);
 823                 if (!NT_STATUS_IS_OK(status)) {
 824                         /* Lower level acl set succeeded,
 825                          * so still return OK. */
 826                         return NT_STATUS_OK;
 827                 }
 828                 psd = new_psd;
 829         }
 830 #endif
 831
 832         if (DEBUGLEVEL >= 10) {
 833                 DEBUG(10,("fset_nt_acl_tdb: storing tdb sd for file %s\n",
 834                         fsp->fsp_name));
 835                 NDR_PRINT_DEBUG(security_descriptor,
 836                         CONST_DISCARD(struct security_descriptor *,psd));
 837         }
 838         create_acl_blob(psd, &blob);
 839         store_acl_blob_fsp(handle, fsp, &blob);
 840
 841         return NT_STATUS_OK;
 842 }
 843
 844 /*******************************************************************
 845  Handle opening the storage tdb if so configured.
 846 *******************************************************************/
 847
 848 static int connect_acl_tdb(struct vfs_handle_struct *handle,
 849                                 const char *service,
 850                                 const char *user)
 851 {
 852         struct db_context *db;
 853         int res;
 854
 855         res = SMB_VFS_NEXT_CONNECT(handle, service, user);
 856         if (res < 0) {
 857                 return res;
 858         }
 859
 860         if (!acl_tdb_init(&db)) {
 861                 SMB_VFS_NEXT_DISCONNECT(handle);
 862                 return -1;
 863         }
 864
 865         SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_tdb_data,
 866                                 struct db_context, return -1);
 867
 868         return 0;
 869 }
 870
 871 /*********************************************************************
 872  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 873 *********************************************************************/
 874
 875 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
 876                               const char *path,
 877                               SMB_ACL_TYPE_T type,
 878                               SMB_ACL_T theacl)
 879 {
 880         SMB_STRUCT_STAT sbuf;
 881         struct db_context *db;
 882         int ret = -1;
 883
 884         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 885
 886         if (lp_posix_pathnames()) {
 887                 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
 888         } else {
 889                 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
 890         }
 891
 892         if (ret == -1) {
 893                 return -1;
 894         }
 895
 896         ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
 897                                                 path,
 898                                                 type,
 899                                                 theacl);
 900         if (ret == -1) {
 901                 return -1;
 902         }
 903
 904         acl_tdb_delete(handle, db, &sbuf);
 905         return 0;
 906 }
 907
 908 /*********************************************************************
 909  Remove a Windows ACL - we're setting the underlying POSIX ACL.
 910 *********************************************************************/
 911
 912 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
 913                             files_struct *fsp,
 914                             SMB_ACL_T theacl)
 915 {
 916         SMB_STRUCT_STAT sbuf;
 917         struct db_context *db;
 918         int ret;
 919
 920         SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
 921
 922         if (fsp->is_directory || fsp->fh->fd == -1) {
 923                 if (fsp->posix_open) {
 924                         ret = vfs_lstat_smb_fname(fsp->conn,fsp->fsp_name,
 925                                                   &sbuf);
 926                 } else {
 927                         ret = vfs_stat_smb_fname(fsp->conn,fsp->fsp_name,
 928                                                  &sbuf);
 929                 }
 930         } else {
 931                 ret = SMB_VFS_FSTAT(fsp, &sbuf);
 932         }
 933         if (ret == -1) {
 934                 return -1;
 935         }
 936
 937         ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
 938                                                 fsp,
 939                                                 theacl);
 940         if (ret == -1) {
 941                 return -1;
 942         }
 943
 944         acl_tdb_delete(handle, db, &sbuf);
 945         return 0;
 946 }
 947
 948 /* VFS operations structure */
 949
 950 static vfs_op_tuple skel_op_tuples[] =
 951 {
 952         {SMB_VFS_OP(connect_acl_tdb), SMB_VFS_OP_CONNECT,  SMB_VFS_LAYER_TRANSPARENT},
 953
 954         {SMB_VFS_OP(mkdir_acl_tdb), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
 955         {SMB_VFS_OP(rmdir_acl_tdb), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
 956
 957         {SMB_VFS_OP(open_acl_tdb),  SMB_VFS_OP_OPEN,  SMB_VFS_LAYER_TRANSPARENT},
 958         {SMB_VFS_OP(unlink_acl_tdb), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
 959
 960         /* NT File ACL operations */
 961
 962         {SMB_VFS_OP(fget_nt_acl_tdb),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 963         {SMB_VFS_OP(get_nt_acl_tdb), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
 964         {SMB_VFS_OP(fset_nt_acl_tdb),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
 965
 966         /* POSIX ACL operations. */
 967         {SMB_VFS_OP(sys_acl_set_file_tdb), SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
 968         {SMB_VFS_OP(sys_acl_set_fd_tdb), SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
 969
 970         {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
 971 };
 972
 973 NTSTATUS vfs_acl_tdb_init(void)
 974 {
 975         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb", skel_op_tuples);
 976 }