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