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 "lib/ldb/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_compare(source_dsa_obj_guid,
  61                                  &reps[i].ctr.ctr1.source_dsa_obj_guid) == 0) {
  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                                                enum drsuapi_DsExtendedOperation extended_op,
  93                                                uint64_t fsmo_info,
  94                                                dreplsrv_extended_callback_t callback,
  95                                                void *cb_data)
  96 {
  97         struct dreplsrv_out_operation *op;
  98
  99         op = talloc_zero(s, struct dreplsrv_out_operation);
 100         W_ERROR_HAVE_NO_MEMORY(op);
 101
 102         op->service     = s;
 103         op->source_dsa  = source;
 104         op->extended_op = extended_op;
 105         op->fsmo_info   = fsmo_info;
 106         op->callback    = callback;
 107         op->cb_data     = cb_data;
 108         op->schedule_time = time(NULL);
 109
 110         DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
 111
 112         return WERR_OK;
 113 }
 114
 115 static WERROR dreplsrv_schedule_partition_pull(struct dreplsrv_service *s,
 116                                                struct dreplsrv_partition *p,
 117                                                TALLOC_CTX *mem_ctx)
 118 {
 119         WERROR status;
 120         struct dreplsrv_partition_source_dsa *cur;
 121
 122         for (cur = p->sources; cur; cur = cur->next) {
 123                 status = dreplsrv_schedule_partition_pull_source(s, cur,
 124                                                                  DRSUAPI_EXOP_NONE, 0,
 125                                                                  NULL, NULL);
 126                 W_ERROR_NOT_OK_RETURN(status);
 127         }
 128
 129         return WERR_OK;
 130 }
 131
 132 WERROR dreplsrv_schedule_pull_replication(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx)
 133 {
 134         WERROR status;
 135         struct dreplsrv_partition *p;
 136
 137         for (p = s->partitions; p; p = p->next) {
 138                 status = dreplsrv_schedule_partition_pull(s, p, mem_ctx);
 139                 W_ERROR_NOT_OK_RETURN(status);
 140         }
 141
 142         return WERR_OK;
 143 }
 144
 145
 146 static void dreplsrv_pending_op_callback(struct tevent_req *subreq)
 147 {
 148         struct dreplsrv_out_operation *op = tevent_req_callback_data(subreq,
 149                                             struct dreplsrv_out_operation);
 150         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 151         struct dreplsrv_service *s = op->service;
 152         WERROR werr;
 153
 154         werr = dreplsrv_op_pull_source_recv(subreq);
 155         TALLOC_FREE(subreq);
 156
 157         DEBUG(4,("dreplsrv_op_pull_source(%s) for %s\n", win_errstr(werr),
 158                  ldb_dn_get_linearized(op->source_dsa->partition->dn)));
 159
 160         if (op->extended_op == DRSUAPI_EXOP_NONE) {
 161                 drepl_reps_update(s, "repsFrom", op->source_dsa->partition->dn,
 162                                   &rf->source_dsa_obj_guid, werr);
 163         }
 164
 165         if (op->callback) {
 166                 op->callback(s, werr, op->extended_ret, op->cb_data);
 167         }
 168         talloc_free(op);
 169         s->ops.current = NULL;
 170         dreplsrv_run_pending_ops(s);
 171 }
 172
 173 void dreplsrv_run_pull_ops(struct dreplsrv_service *s)
 174 {
 175         struct dreplsrv_out_operation *op;
 176         time_t t;
 177         NTTIME now;
 178         struct tevent_req *subreq;
 179
 180         if (s->ops.current) {
 181                 /* if there's still one running, we're done */
 182                 return;
 183         }
 184
 185         if (!s->ops.pending) {
 186                 /* if there're no pending operations, we're done */
 187                 return;
 188         }
 189
 190         t = time(NULL);
 191         unix_to_nt_time(&now, t);
 192
 193         op = s->ops.pending;
 194         s->ops.current = op;
 195         DLIST_REMOVE(s->ops.pending, op);
 196
 197         op->source_dsa->repsFrom1->last_attempt = now;
 198
 199         subreq = dreplsrv_op_pull_source_send(op, s->task->event_ctx, op);
 200         if (!subreq) {
 201                 struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 202
 203                 if (op->extended_op == DRSUAPI_EXOP_NONE) {
 204                         drepl_reps_update(s, "repsFrom", op->source_dsa->partition->dn,
 205                                           &rf->source_dsa_obj_guid, WERR_NOMEM);
 206                 }
 207                 s->ops.current = NULL;
 208
 209                 /*
 210                  * call the callback (if any) so it gets the chance
 211                  * to do its job just like in any other failure situation
 212                  */
 213                 if (op->callback) {
 214                         op->callback(s, WERR_NOMEM, op->extended_ret, op->cb_data);
 215                 }
 216                 return;
 217         }
 218         tevent_req_set_callback(subreq, dreplsrv_pending_op_callback, op);
 219 }