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 "lib/messaging/irpc.h"
  28 #include "dsdb/repl/drepl_service.h"
  29 #include "lib/ldb/include/ldb_errors.h"
  30 #include "../lib/util/dlinklist.h"
  31 #include "librpc/gen_ndr/ndr_misc.h"
  32 #include "librpc/gen_ndr/ndr_drsuapi.h"
  33 #include "librpc/gen_ndr/ndr_drsblobs.h"
  34 #include "libcli/composite/composite.h"
  35 #include "libcli/security/security.h"
  36
  37 /*
  38   update repsFrom/repsTo error information
  39  */
  40 void drepl_reps_update(struct dreplsrv_service *s, const char *reps_attr,
  41                        struct ldb_dn *dn,
  42                        struct GUID *source_dsa_obj_guid, WERROR status)
  43 {
  44         struct repsFromToBlob *reps;
  45         uint32_t count, i;
  46         WERROR werr;
  47         TALLOC_CTX *tmp_ctx = talloc_new(s);
  48         time_t t;
  49         NTTIME now;
  50
  51         t = time(NULL);
  52         unix_to_nt_time(&now, t);
  53
  54         werr = dsdb_loadreps(s->samdb, tmp_ctx, dn, reps_attr, &reps, &count);
  55         if (!W_ERROR_IS_OK(werr)) {
  56                 talloc_free(tmp_ctx);
  57                 return;
  58         }
  59
  60         for (i=0; i<count; i++) {
  61                 if (GUID_compare(source_dsa_obj_guid,
  62                                  &reps[i].ctr.ctr1.source_dsa_obj_guid) == 0) {
  63                         break;
  64                 }
  65         }
  66
  67         if (i == count) {
  68                 /* no record to update */
  69                 talloc_free(tmp_ctx);
  70                 return;
  71         }
  72
  73         /* only update the status fields */
  74         reps[i].ctr.ctr1.last_attempt = now;
  75         reps[i].ctr.ctr1.result_last_attempt = status;
  76         if (W_ERROR_IS_OK(status)) {
  77                 reps[i].ctr.ctr1.last_success = now;
  78                 reps[i].ctr.ctr1.consecutive_sync_failures = 0;
  79         } else {
  80                 reps[i].ctr.ctr1.consecutive_sync_failures++;
  81         }
  82
  83         werr = dsdb_savereps(s->samdb, tmp_ctx, dn, reps_attr, reps, count);
  84         if (!W_ERROR_IS_OK(werr)) {
  85                 DEBUG(2,("drepl_reps_update: Failed to save %s for %s: %s\n",
  86                          reps_attr, ldb_dn_get_linearized(dn), win_errstr(werr)));
  87         }
  88         talloc_free(tmp_ctx);
  89 }
  90
  91 WERROR dreplsrv_schedule_partition_pull_source(struct dreplsrv_service *s,
  92                                                struct dreplsrv_partition_source_dsa *source,
  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         op->source_dsa  = source;
 105         op->extended_op = extended_op;
 106         op->fsmo_info   = fsmo_info;
 107         op->callback    = callback;
 108         op->cb_data     = cb_data;
 109         op->schedule_time = time(NULL);
 110
 111         DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
 112
 113         return WERR_OK;
 114 }
 115
 116 static WERROR dreplsrv_schedule_partition_pull(struct dreplsrv_service *s,
 117                                                struct dreplsrv_partition *p,
 118                                                TALLOC_CTX *mem_ctx)
 119 {
 120         WERROR status;
 121         struct dreplsrv_partition_source_dsa *cur;
 122
 123         for (cur = p->sources; cur; cur = cur->next) {
 124                 status = dreplsrv_schedule_partition_pull_source(s, cur,
 125                                                                  DRSUAPI_EXOP_NONE, 0,
 126                                                                  NULL, NULL);
 127                 W_ERROR_NOT_OK_RETURN(status);
 128         }
 129
 130         return WERR_OK;
 131 }
 132
 133 WERROR dreplsrv_schedule_pull_replication(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx)
 134 {
 135         WERROR status;
 136         struct dreplsrv_partition *p;
 137
 138         for (p = s->partitions; p; p = p->next) {
 139                 status = dreplsrv_schedule_partition_pull(s, p, mem_ctx);
 140                 W_ERROR_NOT_OK_RETURN(status);
 141         }
 142
 143         return WERR_OK;
 144 }
 145
 146
 147 static void dreplsrv_pending_op_callback(struct tevent_req *subreq)
 148 {
 149         struct dreplsrv_out_operation *op = tevent_req_callback_data(subreq,
 150                                             struct dreplsrv_out_operation);
 151         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 152         struct dreplsrv_service *s = op->service;
 153         WERROR werr;
 154
 155         werr = dreplsrv_op_pull_source_recv(subreq);
 156         TALLOC_FREE(subreq);
 157
 158         DEBUG(4,("dreplsrv_op_pull_source(%s) for %s\n", win_errstr(werr),
 159                  ldb_dn_get_linearized(op->source_dsa->partition->dn)));
 160
 161         if (op->extended_op == DRSUAPI_EXOP_NONE) {
 162                 drepl_reps_update(s, "repsFrom", op->source_dsa->partition->dn,
 163                                   &rf->source_dsa_obj_guid, werr);
 164         }
 165
 166         if (op->callback) {
 167                 op->callback(s, werr, op->extended_ret, op->cb_data);
 168         }
 169         talloc_free(op);
 170         s->ops.current = NULL;
 171         dreplsrv_run_pending_ops(s);
 172 }
 173
 174 void dreplsrv_run_pull_ops(struct dreplsrv_service *s)
 175 {
 176         struct dreplsrv_out_operation *op;
 177         time_t t;
 178         NTTIME now;
 179         struct tevent_req *subreq;
 180
 181         if (s->ops.current) {
 182                 /* if there's still one running, we're done */
 183                 return;
 184         }
 185
 186         if (!s->ops.pending) {
 187                 /* if there're no pending operations, we're done */
 188                 return;
 189         }
 190
 191         t = time(NULL);
 192         unix_to_nt_time(&now, t);
 193
 194         op = s->ops.pending;
 195         s->ops.current = op;
 196         DLIST_REMOVE(s->ops.pending, op);
 197
 198         op->source_dsa->repsFrom1->last_attempt = now;
 199
 200         subreq = dreplsrv_op_pull_source_send(op, s->task->event_ctx, op);
 201         if (!subreq) {
 202                 struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 203
 204                 if (op->extended_op == DRSUAPI_EXOP_NONE) {
 205                         drepl_reps_update(s, "repsFrom", op->source_dsa->partition->dn,
 206                                           &rf->source_dsa_obj_guid, WERR_NOMEM);
 207                 }
 208                 s->ops.current = NULL;
 209
 210                 /*
 211                  * call the callback (if any) so it gets the chance
 212                  * to do its job just like in any other failure situation
 213                  */
 214                 if (op->callback) {
 215                         op->callback(s, WERR_NOMEM, op->extended_ret, op->cb_data);
 216                 }
 217                 return;
 218         }
 219         tevent_req_set_callback(subreq, dreplsrv_pending_op_callback, op);
 220 }