source4/dsdb/kcc/kcc_deleted.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    handle removal of deleted objects
   5
   6    Copyright (C) 2009 Andrew Tridgell
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 */
  22
  23 #include "includes.h"
  24 #include "lib/events/events.h"
  25 #include "dsdb/samdb/samdb.h"
  26 #include "auth/auth.h"
  27 #include "smbd/service.h"
  28 #include "lib/messaging/irpc.h"
  29 #include "dsdb/kcc/kcc_connection.h"
  30 #include "dsdb/kcc/kcc_service.h"
  31 #include "lib/ldb/include/ldb_errors.h"
  32 #include "../lib/util/dlinklist.h"
  33 #include "librpc/gen_ndr/ndr_misc.h"
  34 #include "librpc/gen_ndr/ndr_drsuapi.h"
  35 #include "librpc/gen_ndr/ndr_drsblobs.h"
  36 #include "param/param.h"
  37 #include "dsdb/common/util.h"
  38
  39 /*
  40   check to see if any deleted objects need scavenging
  41  */
  42 NTSTATUS kccsrv_check_deleted(struct kccsrv_service *s, TALLOC_CTX *mem_ctx)
  43 {
  44         struct kccsrv_partition *part;
  45         int ret;
  46         uint32_t tombstoneLifetime;
  47
  48         time_t t = time(NULL);
  49         if (t - s->last_deleted_check < lp_parm_int(s->task->lp_ctx, NULL, "kccsrv",
  50                                                     "check_deleted_interval", 600)) {
  51                 return NT_STATUS_OK;
  52         }
  53         s->last_deleted_check = t;
  54
  55         ret = dsdb_tombstone_lifetime(s->samdb, &tombstoneLifetime);
  56         if (ret != LDB_SUCCESS) {
  57                 DEBUG(1,(__location__ ": Failed to get tombstone lifetime\n"));
  58                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
  59         }
  60
  61         for (part=s->partitions; part; part=part->next) {
  62                 struct ldb_dn *do_dn;
  63                 struct ldb_result *res;
  64                 const char *attrs[] = { "whenChanged", NULL };
  65                 unsigned int i;
  66
  67                 ret = dsdb_get_deleted_objects_dn(s->samdb, mem_ctx, part->dn, &do_dn);
  68                 if (ret != LDB_SUCCESS) {
  69                         /* some partitions have no Deleted Objects
  70                            container */
  71                         continue;
  72                 }
  73                 ret = dsdb_search(s->samdb, do_dn, &res, do_dn, LDB_SCOPE_ONELEVEL, attrs,
  74                                   DSDB_SEARCH_SHOW_DELETED, NULL);
  75
  76                 if (ret != LDB_SUCCESS) {
  77                         DEBUG(1,(__location__ ": Failed to search for deleted objects in %s\n",
  78                                  ldb_dn_get_linearized(do_dn)));
  79                         talloc_free(do_dn);
  80                         continue;
  81                 }
  82
  83                 for (i=0; i<res->count; i++) {
  84                         const char *tstring;
  85                         time_t whenChanged = 0;
  86
  87                         tstring = samdb_result_string(res->msgs[i], "whenChanged", NULL);
  88                         if (tstring) {
  89                                 whenChanged = ldb_string_to_time(tstring);
  90                         }
  91                         if (t - whenChanged > tombstoneLifetime*60*60*24) {
  92                                 ret = ldb_delete(s->samdb, res->msgs[i]->dn);
  93                                 if (ret != LDB_SUCCESS) {
  94                                         DEBUG(1,(__location__ ": Failed to remove deleted object %s\n",
  95                                                  ldb_dn_get_linearized(res->msgs[i]->dn)));
  96                                 } else {
  97                                         DEBUG(4,("Removed deleted object %s\n",
  98                                                  ldb_dn_get_linearized(res->msgs[i]->dn)));
  99                                 }
 100                         }
 101                 }
 102
 103                 talloc_free(do_dn);
 104         }
 105
 106         return NT_STATUS_OK;
 107 }