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