source4/dsdb/repl/drepl_out_pull.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    DSDB replication service outgoing Pull-Replication
   4
   5    Copyright (C) Stefan Metzmacher 2007
   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
  22 #include "includes.h"
  23 #include "dsdb/samdb/samdb.h"
  24 #include "auth/auth.h"
  25 #include "smbd/service.h"
  26 #include "lib/events/events.h"
  27 #include "dsdb/repl/drepl_service.h"
  28 #include <ldb_errors.h>
  29 #include "../lib/util/dlinklist.h"
  30 #include "librpc/gen_ndr/ndr_misc.h"
  31 #include "librpc/gen_ndr/ndr_drsuapi.h"
  32 #include "librpc/gen_ndr/ndr_drsblobs.h"
  33 #include "libcli/composite/composite.h"
  34 #include "libcli/security/security.h"
  35
  36 /*
  37   update repsFrom/repsTo error information
  38  */
  39 void drepl_reps_update(struct dreplsrv_service *s, const char *reps_attr,
  40                        struct ldb_dn *dn,
  41                        struct GUID *source_dsa_obj_guid, WERROR status)
  42 {
  43         struct repsFromToBlob *reps;
  44         uint32_t count, i;
  45         WERROR werr;
  46         TALLOC_CTX *tmp_ctx = talloc_new(s);
  47         time_t t;
  48         NTTIME now;
  49
  50         t = time(NULL);
  51         unix_to_nt_time(&now, t);
  52
  53         werr = dsdb_loadreps(s->samdb, tmp_ctx, dn, reps_attr, &reps, &count);
  54         if (!W_ERROR_IS_OK(werr)) {
  55                 talloc_free(tmp_ctx);
  56                 return;
  57         }
  58
  59         for (i=0; i<count; i++) {
  60                 if (GUID_equal(source_dsa_obj_guid,
  61                                &reps[i].ctr.ctr1.source_dsa_obj_guid)) {
  62                         break;
  63                 }
  64         }
  65
  66         if (i == count) {
  67                 /* no record to update */
  68                 talloc_free(tmp_ctx);
  69                 return;
  70         }
  71
  72         /* only update the status fields */
  73         reps[i].ctr.ctr1.last_attempt = now;
  74         reps[i].ctr.ctr1.result_last_attempt = status;
  75         if (W_ERROR_IS_OK(status)) {
  76                 reps[i].ctr.ctr1.last_success = now;
  77                 reps[i].ctr.ctr1.consecutive_sync_failures = 0;
  78         } else {
  79                 reps[i].ctr.ctr1.consecutive_sync_failures++;
  80         }
  81
  82         werr = dsdb_savereps(s->samdb, tmp_ctx, dn, reps_attr, reps, count);
  83         if (!W_ERROR_IS_OK(werr)) {
  84                 DEBUG(2,("drepl_reps_update: Failed to save %s for %s: %s\n",
  85                          reps_attr, ldb_dn_get_linearized(dn), win_errstr(werr)));
  86         }
  87         talloc_free(tmp_ctx);
  88 }
  89
  90 WERROR dreplsrv_schedule_partition_pull_source(struct dreplsrv_service *s,
  91                                                struct dreplsrv_partition_source_dsa *source,
  92                                                uint32_t options,
  93                                                enum drsuapi_DsExtendedOperation extended_op,
  94                                                uint64_t fsmo_info,
  95                                                dreplsrv_extended_callback_t callback,
  96                                                void *cb_data)
  97 {
  98         struct dreplsrv_out_operation *op;
  99
 100         op = talloc_zero(s, struct dreplsrv_out_operation);
 101         W_ERROR_HAVE_NO_MEMORY(op);
 102
 103         op->service     = s;
 104         /*
 105          * source may either be the long-term list of partners, or
 106          * from dreplsrv_partition_source_dsa_temporary().  Because it
 107          * can be either, we can't talloc_steal() it here, so we
 108          * instead we reference it.
 109          *
 110          * We never talloc_free() the p->sources pointers - indeed we
 111          * never remove them - and the temp source will otherwise go
 112          * away with the msg it is allocated on.
 113          *
 114          * Finally the pointer created in drepl_request_extended_op()
 115          * is removed with talloc_unlink().
 116          *
 117          */
 118         op->source_dsa  = talloc_reference(op, source);
 119         if (!op->source_dsa) {
 120                 return WERR_NOMEM;
 121         }
 122
 123         op->options     = options;
 124         op->extended_op = extended_op;
 125         op->fsmo_info   = fsmo_info;
 126         op->callback    = callback;
 127         op->cb_data     = cb_data;
 128         op->schedule_time = time(NULL);
 129
 130         DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
 131
 132         return WERR_OK;
 133 }
 134
 135 static WERROR dreplsrv_schedule_partition_pull(struct dreplsrv_service *s,
 136                                                struct dreplsrv_partition *p,
 137                                                TALLOC_CTX *mem_ctx)
 138 {
 139         WERROR status;
 140         struct dreplsrv_partition_source_dsa *cur;
 141
 142         for (cur = p->sources; cur; cur = cur->next) {
 143                 status = dreplsrv_schedule_partition_pull_source(s, cur,
 144                                                                  0, DRSUAPI_EXOP_NONE, 0,
 145                                                                  NULL, NULL);
 146                 W_ERROR_NOT_OK_RETURN(status);
 147         }
 148
 149         return WERR_OK;
 150 }
 151
 152 WERROR dreplsrv_schedule_pull_replication(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx)
 153 {
 154         WERROR status;
 155         struct dreplsrv_partition *p;
 156
 157         for (p = s->partitions; p; p = p->next) {
 158                 status = dreplsrv_schedule_partition_pull(s, p, mem_ctx);
 159                 W_ERROR_NOT_OK_RETURN(status);
 160         }
 161
 162         return WERR_OK;
 163 }
 164
 165
 166 static void dreplsrv_pending_op_callback(struct tevent_req *subreq)
 167 {
 168         struct dreplsrv_out_operation *op = tevent_req_callback_data(subreq,
 169                                             struct dreplsrv_out_operation);
 170         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 171         struct dreplsrv_service *s = op->service;
 172         WERROR werr;
 173
 174         werr = dreplsrv_op_pull_source_recv(subreq);
 175         TALLOC_FREE(subreq);
 176
 177         DEBUG(4,("dreplsrv_op_pull_source(%s) for %s\n", win_errstr(werr),
 178                  ldb_dn_get_linearized(op->source_dsa->partition->dn)));
 179
 180         if (op->extended_op == DRSUAPI_EXOP_NONE) {
 181                 drepl_reps_update(s, "repsFrom", op->source_dsa->partition->dn,
 182                                   &rf->source_dsa_obj_guid, werr);
 183         }
 184
 185         if (op->callback) {
 186                 op->callback(s, werr, op->extended_ret, op->cb_data);
 187         }
 188         talloc_free(op);
 189         s->ops.current = NULL;
 190         dreplsrv_run_pending_ops(s);
 191 }
 192
 193 void dreplsrv_run_pull_ops(struct dreplsrv_service *s)
 194 {
 195         struct dreplsrv_out_operation *op;
 196         time_t t;
 197         NTTIME now;
 198         struct tevent_req *subreq;
 199         WERROR werr;
 200
 201         if (s->ops.current) {
 202                 /* if there's still one running, we're done */
 203                 return;
 204         }
 205
 206         if (!s->ops.pending) {
 207                 /* if there're no pending operations, we're done */
 208                 return;
 209         }
 210
 211         t = time(NULL);
 212         unix_to_nt_time(&now, t);
 213
 214         op = s->ops.pending;
 215         s->ops.current = op;
 216         DLIST_REMOVE(s->ops.pending, op);
 217
 218         op->source_dsa->repsFrom1->last_attempt = now;
 219
 220         /* check if inbound replication is enabled */
 221         if (!(op->options & DRSUAPI_DRS_SYNC_FORCED)) {
 222                 uint32_t rep_options;
 223                 if (samdb_ntds_options(op->service->samdb, &rep_options) != LDB_SUCCESS) {
 224                         werr = WERR_DS_DRA_INTERNAL_ERROR;
 225                         goto failed;
 226                 }
 227
 228                 if ((rep_options & DS_NTDSDSA_OPT_DISABLE_INBOUND_REPL)) {
 229                         werr = WERR_DS_DRA_SINK_DISABLED;
 230                         goto failed;
 231                 }
 232         }
 233
 234         subreq = dreplsrv_op_pull_source_send(op, s->task->event_ctx, op);
 235         if (!subreq) {
 236                 werr = WERR_NOMEM;
 237                 goto failed;
 238         }
 239
 240         tevent_req_set_callback(subreq, dreplsrv_pending_op_callback, op);
 241         return;
 242
 243 failed:
 244         if (op->extended_op == DRSUAPI_EXOP_NONE) {
 245                 drepl_reps_update(s, "repsFrom", op->source_dsa->partition->dn,
 246                                   &op->source_dsa->repsFrom1->source_dsa_obj_guid, werr);
 247         }
 248         /* unblock queue processing */
 249         s->ops.current = NULL;
 250         /*
 251          * let the callback do its job just like in any other failure situation
 252          */
 253         if (op->callback) {
 254                 op->callback(s, werr, op->extended_ret, op->cb_data);
 255         }
 256 }