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
  83 /* force an immediate of the specified partition by GUID  */
  84 WERROR dreplsrv_schedule_partition_pull_by_guid(struct dreplsrv_service *s, TALLOC_CTX *mem_ctx,
  85                                                 struct GUID *guid)
  86 {
  87         struct dreplsrv_partition *p;
  88
  89         for (p = s->partitions; p; p = p->next) {
  90                 if (GUID_compare(&p->nc.guid, guid) == 0) {
  91                         return dreplsrv_schedule_partition_pull(s, p, mem_ctx);
  92                 }
  93         }
  94
  95         return WERR_NOT_FOUND;
  96 }
  97
  98 static void dreplsrv_pending_op_callback(struct dreplsrv_out_operation *op)
  99 {
 100         struct repsFromTo1 *rf = op->source_dsa->repsFrom1;
 101         struct dreplsrv_service *s = op->service;
 102         time_t t;
 103         NTTIME now;
 104
 105         t = time(NULL);
 106         unix_to_nt_time(&now, t);
 107
 108         rf->result_last_attempt = dreplsrv_op_pull_source_recv(op->creq);
 109         if (W_ERROR_IS_OK(rf->result_last_attempt)) {
 110                 rf->consecutive_sync_failures   = 0;
 111                 rf->last_success                = now;
 112                 DEBUG(3,("dreplsrv_op_pull_source(%s)\n",
 113                         win_errstr(rf->result_last_attempt)));
 114                 goto done;
 115         }
 116
 117         rf->consecutive_sync_failures++;
 118
 119         DEBUG(1,("dreplsrv_op_pull_source(%s/%s) failures[%u]\n",
 120                 win_errstr(rf->result_last_attempt),
 121                 nt_errstr(werror_to_ntstatus(rf->result_last_attempt)),
 122                 rf->consecutive_sync_failures));
 123
 124 done:
 125         talloc_free(op);
 126         s->ops.current = NULL;
 127         dreplsrv_run_pending_ops(s);
 128         dreplsrv_notify_run_ops(s);
 129 }
 130
 131 static void dreplsrv_pending_op_callback_creq(struct composite_context *creq)
 132 {
 133         struct dreplsrv_out_operation *op = talloc_get_type(creq->async.private_data,
 134                                                            struct dreplsrv_out_operation);
 135         dreplsrv_pending_op_callback(op);
 136 }
 137
 138 void dreplsrv_run_pending_ops(struct dreplsrv_service *s)
 139 {
 140         struct dreplsrv_out_operation *op;
 141         time_t t;
 142         NTTIME now;
 143
 144         if (s->ops.current || s->ops.n_current) {
 145                 /* if there's still one running, we're done */
 146                 return;
 147         }
 148
 149         if (!s->ops.pending) {
 150                 /* if there're no pending operations, we're done */
 151                 return;
 152         }
 153
 154         t = time(NULL);
 155         unix_to_nt_time(&now, t);
 156
 157         op = s->ops.pending;
 158         s->ops.current = op;
 159         DLIST_REMOVE(s->ops.pending, op);
 160
 161         op->source_dsa->repsFrom1->last_attempt = now;
 162
 163         op->creq = dreplsrv_op_pull_source_send(op);
 164         if (!op->creq) {
 165                 dreplsrv_pending_op_callback(op);
 166                 return;
 167         }
 168
 169         op->creq->async.fn              = dreplsrv_pending_op_callback_creq;
 170         op->creq->async.private_data    = op;
 171 }