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
  36 static WERROR dreplsrv_schedule_partition_pull_source(struct dreplsrv_service *s,
  37                                                       struct dreplsrv_partition *p,
  38                                                       struct dreplsrv_partition_source_dsa *source,
  39                                                       TALLOC_CTX *mem_ctx)
  40 {
  41         struct dreplsrv_out_operation *op;
  42
  43         op = talloc_zero(mem_ctx, struct dreplsrv_out_operation);
  44         W_ERROR_HAVE_NO_MEMORY(op);
  45
  46         op->service     = s;
  47         op->source_dsa  = source;
  48
  49         DLIST_ADD_END(s->ops.pending, op, struct dreplsrv_out_operation *);
  50         talloc_steal(s, op);
  51         return WERR_OK;
  52 }
  53
  54 static WERROR dreplsrv_schedule_partition_pull(struct dreplsrv_service *s,
  55                                                struct dreplsrv_partition *p,
  56                                                TALLOC_CTX *mem_ctx)
  57 {
  58         WERROR status;
  59         struct dreplsrv_partition_source_dsa *cur;
  60
  61         for (cur = p->sources; cur; cur = cur->next) {
  62                 status = dreplsrv_schedule_partition_pull_source(s, p, cur, mem_ctx);
  63                 W_ERROR_NOT_OK_RETURN(status);
  64         }
  65
  66         return WERR_OK;
  67 }
  68
  69 WERROR dreplsrv_schedule_pull_replication(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx)
  70 {
  71         WERROR status;
  72         struct dreplsrv_partition *p;
  73
  74         for (p = s->partitions; p; p = p->next) {
  75                 status = dreplsrv_schedule_partition_pull(s, p, mem_ctx);
  76                 W_ERROR_NOT_OK_RETURN(status);
  77         }
  78
  79         return WERR_OK;
  80 }
  81
  82 static void dreplsrv_pending_op_callback(struct dreplsrv_out_operation *op)
  83 {
  84         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
  85         struct dreplsrv_service *s = op->service;
  86         time_t t;
  87         NTTIME now;
  88
  89         t = time(NULL);
  90         unix_to_nt_time(&now, t);
  91
  92         rf->result_last_attempt = dreplsrv_op_pull_source_recv(op->creq);
  93         if (W_ERROR_IS_OK(rf->result_last_attempt)) {
  94                 rf->consecutive_sync_failures   = 0;
  95                 rf->last_success                = now;
  96                 DEBUG(2,("dreplsrv_op_pull_source(%s)\n",
  97                         win_errstr(rf->result_last_attempt)));
  98                 goto done;
  99         }
 100
 101         rf->consecutive_sync_failures++;
 102
 103         DEBUG(1,("dreplsrv_op_pull_source(%s/%s) failures[%u]\n",
 104                 win_errstr(rf->result_last_attempt),
 105                 nt_errstr(werror_to_ntstatus(rf->result_last_attempt)),
 106                 rf->consecutive_sync_failures));
 107
 108 done:
 109         talloc_free(op);
 110         s->ops.current = NULL;
 111         dreplsrv_run_pending_ops(s);
 112 }
 113
 114 static void dreplsrv_pending_op_callback_creq(struct composite_context *creq)
 115 {
 116         struct dreplsrv_out_operation *op = talloc_get_type(creq->async.private_data,
 117                                                            struct dreplsrv_out_operation);
 118         dreplsrv_pending_op_callback(op);
 119 }
 120
 121 void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
 122 {
 123         struct dreplsrv_out_operation *op;
 124         time_t t;
 125         NTTIME now;
 126
 127         if (s->ops.current) {
 128                 /* if there's still one running, we're done */
 129                 return;
 130         }
 131
 132         if (!s->ops.pending) {
 133                 /* if there're no pending operations, we're done */
 134                 return;
 135         }
 136
 137         t = time(NULL);
 138         unix_to_nt_time(&now, t);
 139
 140         op = s->ops.pending;
 141         s->ops.current = op;
 142         DLIST_REMOVE(s->ops.pending, op);
 143
 144         op->source_dsa->repsFrom1->last_attempt = now;
 145
 146         op->creq = dreplsrv_op_pull_source_send(op);
 147         if (!op->creq) {
 148                 dreplsrv_pending_op_callback(op);
 149                 return;
 150         }
 151
 152         op->creq->async.fn              = dreplsrv_pending_op_callback_creq;
 153         op->creq->async.private_data    = op;
 154 }