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                                                void *cb_data)
  43 {
  44         struct dreplsrv_out_operation *op;
  45
  46         op = talloc_zero(s, struct dreplsrv_out_operation);
  47         W_ERROR_HAVE_NO_MEMORY(op);
  48
  49         op->service     = s;
  50         op->source_dsa  = source;
  51         op->extended_op = extended_op;
  52         op->fsmo_info   = fsmo_info;
  53         op->callback    = callback;
  54         op->cb_data     = cb_data;
  55
  56         DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
  57
  58         return WERR_OK;
  59 }
  60
  61 static WERROR dreplsrv_schedule_partition_pull(struct dreplsrv_service *s,
  62                                                struct dreplsrv_partition *p,
  63                                                TALLOC_CTX *mem_ctx)
  64 {
  65         WERROR status;
  66         struct dreplsrv_partition_source_dsa *cur;
  67
  68         for (cur = p->sources; cur; cur = cur->next) {
  69                 status = dreplsrv_schedule_partition_pull_source(s, cur,
  70                                                                  DRSUAPI_EXOP_NONE, 0,
  71                                                                  NULL, NULL);
  72                 W_ERROR_NOT_OK_RETURN(status);
  73         }
  74
  75         return WERR_OK;
  76 }
  77
  78 WERROR dreplsrv_schedule_pull_replication(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx)
  79 {
  80         WERROR status;
  81         struct dreplsrv_partition *p;
  82
  83         for (p = s->partitions; p; p = p->next) {
  84                 status = dreplsrv_schedule_partition_pull(s, p, mem_ctx);
  85                 W_ERROR_NOT_OK_RETURN(status);
  86         }
  87
  88         return WERR_OK;
  89 }
  90
  91
  92 static void dreplsrv_pending_op_callback(struct tevent_req *subreq)
  93 {
  94         struct dreplsrv_out_operation *op = tevent_req_callback_data(subreq,
  95                                             struct dreplsrv_out_operation);
  96         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
  97         struct dreplsrv_service *s = op->service;
  98         time_t t;
  99         NTTIME now;
 100
 101         t = time(NULL);
 102         unix_to_nt_time(&now, t);
 103
 104         rf->result_last_attempt = dreplsrv_op_pull_source_recv(subreq);
 105         TALLOC_FREE(subreq);
 106         if (W_ERROR_IS_OK(rf->result_last_attempt)) {
 107                 rf->consecutive_sync_failures   = 0;
 108                 rf->last_success                = now;
 109                 DEBUG(3,("dreplsrv_op_pull_source(%s)\n",
 110                         win_errstr(rf->result_last_attempt)));
 111                 goto done;
 112         }
 113
 114         rf->consecutive_sync_failures++;
 115
 116         DEBUG(1,("dreplsrv_op_pull_source(%s/%s) for %s failures[%u]\n",
 117                  win_errstr(rf->result_last_attempt),
 118                  nt_errstr(werror_to_ntstatus(rf->result_last_attempt)),
 119                  ldb_dn_get_linearized(op->source_dsa->partition->dn),
 120                  rf->consecutive_sync_failures));
 121
 122 done:
 123         if (op->callback) {
 124                 op->callback(s, rf->result_last_attempt, op->extended_ret, op->cb_data);
 125         }
 126         talloc_free(op);
 127         s->ops.current = NULL;
 128         dreplsrv_run_pending_ops(s);
 129         dreplsrv_notify_run_ops(s);
 130 }
 131
 132 void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
 133 {
 134         struct dreplsrv_out_operation *op;
 135         time_t t;
 136         NTTIME now;
 137         struct tevent_req *subreq;
 138
 139         if (s->ops.current || s->ops.n_current) {
 140                 /* if there's still one running, we're done */
 141                 return;
 142         }
 143
 144         if (!s->ops.pending) {
 145                 /* if there're no pending operations, we're done */
 146                 return;
 147         }
 148
 149         t = time(NULL);
 150         unix_to_nt_time(&now, t);
 151
 152         op = s->ops.pending;
 153         s->ops.current = op;
 154         DLIST_REMOVE(s->ops.pending, op);
 155
 156         op->source_dsa->repsFrom1->last_attempt = now;
 157
 158         subreq = dreplsrv_op_pull_source_send(op, s->task->event_ctx, op);
 159         if (!subreq) {
 160                 struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 161
 162                 rf->result_last_attempt = WERR_NOMEM;
 163                 rf->consecutive_sync_failures++;
 164                 s->ops.current = NULL;
 165
 166                 DEBUG(1,("dreplsrv_op_pull_source(%s/%s) failures[%u]\n",
 167                         win_errstr(rf->result_last_attempt),
 168                         nt_errstr(werror_to_ntstatus(rf->result_last_attempt)),
 169                         rf->consecutive_sync_failures));
 170                 return;
 171         }
 172         tevent_req_set_callback(subreq, dreplsrv_pending_op_callback, op);
 173 }