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/dom_sid.h"
  36
  37 WERROR dreplsrv_schedule_partition_pull_source(struct dreplsrv_service *s,
  38                                                struct dreplsrv_partition_source_dsa *source,
  39                                                enum drsuapi_DsExtendedOperation extended_op,
  40                                                uint64_t fsmo_info,
  41                                                dreplsrv_fsmo_callback_t callback)
  42 {
  43         struct dreplsrv_out_operation *op;
  44
  45         op = talloc_zero(s, struct dreplsrv_out_operation);
  46         W_ERROR_HAVE_NO_MEMORY(op);
  47
  48         op->service     = s;
  49         op->source_dsa  = source;
  50         op->extended_op = extended_op;
  51         op->fsmo_info   = fsmo_info;
  52         op->callback    = callback;
  53
  54         DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
  55
  56         return WERR_OK;
  57 }
  58
  59 static WERROR dreplsrv_schedule_partition_pull(struct dreplsrv_service *s,
  60                                                struct dreplsrv_partition *p,
  61                                                TALLOC_CTX *mem_ctx)
  62 {
  63         WERROR status;
  64         struct dreplsrv_partition_source_dsa *cur;
  65
  66         for (cur = p->sources; cur; cur = cur->next) {
  67                 status = dreplsrv_schedule_partition_pull_source(s, cur, DRSUAPI_EXOP_NONE, 0, NULL);
  68                 W_ERROR_NOT_OK_RETURN(status);
  69         }
  70
  71         return WERR_OK;
  72 }
  73
  74 WERROR dreplsrv_schedule_pull_replication(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx)
  75 {
  76         WERROR status;
  77         struct dreplsrv_partition *p;
  78
  79         for (p = s->partitions; p; p = p->next) {
  80                 status = dreplsrv_schedule_partition_pull(s, p, mem_ctx);
  81                 W_ERROR_NOT_OK_RETURN(status);
  82         }
  83
  84         return WERR_OK;
  85 }
  86
  87
  88 /* force an immediate of the specified partition by GUID  */
  89 WERROR dreplsrv_schedule_partition_pull_by_guid(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx,
  90                                                 struct GUID *guid)
  91 {
  92         struct dreplsrv_partition *p;
  93
  94         for (p = s->partitions; p; p = p->next) {
  95                 if (GUID_compare(&p->nc.guid, guid) == 0) {
  96                         return dreplsrv_schedule_partition_pull(s, p, mem_ctx);
  97                 }
  98         }
  99
 100         return WERR_NOT_FOUND;
 101 }
 102
 103 /* force an immediate of the specified partition by Naming Context */
 104 WERROR dreplsrv_schedule_partition_pull_by_nc(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx,
 105                                               struct drsuapi_DsReplicaObjectIdentifier *nc)
 106 {
 107         struct dreplsrv_partition *p;
 108         bool valid_sid, valid_guid;
 109         struct dom_sid null_sid;
 110         ZERO_STRUCT(null_sid);
 111
 112         valid_sid  = !dom_sid_equal(&null_sid, &nc->sid);
 113         valid_guid = !GUID_all_zero(&nc->guid);
 114
 115         if (!valid_sid && !valid_guid && !nc->dn) {
 116                 return WERR_DS_DRA_INVALID_PARAMETER;
 117         }
 118
 119         for (p = s->partitions; p; p = p->next) {
 120                 if ((valid_guid && GUID_equal(&p->nc.guid, &nc->guid))
 121                     || strequal(p->nc.dn, nc->dn)
 122                     || (valid_sid && dom_sid_equal(&p->nc.sid, &nc->sid))) {
 123                         return dreplsrv_schedule_partition_pull(s, p, mem_ctx);
 124                 }
 125         }
 126
 127         return WERR_DS_DRA_BAD_NC;
 128 }
 129
 130
 131 static void dreplsrv_pending_op_callback(struct tevent_req *subreq)
 132 {
 133         struct dreplsrv_out_operation *op = tevent_req_callback_data(subreq,
 134                                             struct dreplsrv_out_operation);
 135         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 136         struct dreplsrv_service *s = op->service;
 137         time_t t;
 138         NTTIME now;
 139
 140         t = time(NULL);
 141         unix_to_nt_time(&now, t);
 142
 143         rf->result_last_attempt = dreplsrv_op_pull_source_recv(subreq);
 144         TALLOC_FREE(subreq);
 145         if (W_ERROR_IS_OK(rf->result_last_attempt)) {
 146                 rf->consecutive_sync_failures   = 0;
 147                 rf->last_success                = now;
 148                 DEBUG(3,("dreplsrv_op_pull_source(%s)\n",
 149                         win_errstr(rf->result_last_attempt)));
 150                 goto done;
 151         }
 152
 153         rf->consecutive_sync_failures++;
 154
 155         DEBUG(1,("dreplsrv_op_pull_source(%s/%s) for %s failures[%u]\n",
 156                  win_errstr(rf->result_last_attempt),
 157                  nt_errstr(werror_to_ntstatus(rf->result_last_attempt)),
 158                  ldb_dn_get_linearized(op->source_dsa->partition->dn),
 159                  rf->consecutive_sync_failures));
 160
 161 done:
 162         if (op->callback) {
 163                 op->callback(s, rf->result_last_attempt, op->extended_ret);
 164         }
 165         talloc_free(op);
 166         s->ops.current = NULL;
 167         dreplsrv_run_pending_ops(s);
 168         dreplsrv_notify_run_ops(s);
 169 }
 170
 171 void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
 172 {
 173         struct dreplsrv_out_operation *op;
 174         time_t t;
 175         NTTIME now;
 176         struct tevent_req *subreq;
 177
 178         if (s->ops.current || s->ops.n_current) {
 179                 /* if there's still one running, we're done */
 180                 return;
 181         }
 182
 183         if (!s->ops.pending) {
 184                 /* if there're no pending operations, we're done */
 185                 return;
 186         }
 187
 188         t = time(NULL);
 189         unix_to_nt_time(&now, t);
 190
 191         op = s->ops.pending;
 192         s->ops.current = op;
 193         DLIST_REMOVE(s->ops.pending, op);
 194
 195         op->source_dsa->repsFrom1->last_attempt = now;
 196
 197         subreq = dreplsrv_op_pull_source_send(op, s->task->event_ctx, op);
 198         if (!subreq) {
 199                 struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 200
 201                 rf->result_last_attempt = WERR_NOMEM;
 202                 rf->consecutive_sync_failures++;
 203                 s->ops.current = NULL;
 204
 205                 DEBUG(1,("dreplsrv_op_pull_source(%s/%s) failures[%u]\n",
 206                         win_errstr(rf->result_last_attempt),
 207                         nt_errstr(werror_to_ntstatus(rf->result_last_attempt)),
 208                         rf->consecutive_sync_failures));
 209                 return;
 210         }
 211         tevent_req_set_callback(subreq, dreplsrv_pending_op_callback, op);
 212 }