git.sur5r.net Git - openldap/blob - servers/slapd/repl.c

   1 /* repl.c - log modifications for replication purposes */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2005 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27 #include "portable.h"
  28
  29 #include <stdio.h>
  30
  31 #include <ac/string.h>
  32 #include <ac/ctype.h>
  33 #include <ac/socket.h>
  34
  35 #ifdef HAVE_SYS_FILE_H
  36 #include <sys/file.h>
  37 #endif
  38
  39 #include "slap.h"
  40 #include "ldif.h"
  41
  42 int
  43 add_replica_info(
  44         Backend         *be,
  45         const char      *uri,
  46         const char      *host )
  47 {
  48         int i = 0;
  49
  50         assert( be != NULL );
  51         assert( host != NULL );
  52
  53         if ( be->be_replica != NULL ) {
  54                 for ( ; be->be_replica[ i ] != NULL; i++ );
  55         }
  56
  57         be->be_replica = ch_realloc( be->be_replica,
  58                 sizeof( struct slap_replica_info * )*( i + 2 ) );
  59
  60         be->be_replica[ i ]
  61                 = ch_calloc( sizeof( struct slap_replica_info ), 1 );
  62         be->be_replica[ i ]->ri_uri = uri;
  63         be->be_replica[ i ]->ri_host = host;
  64         be->be_replica[ i ]->ri_nsuffix = NULL;
  65         be->be_replica[ i ]->ri_attrs = NULL;
  66         be->be_replica[ i + 1 ] = NULL;
  67
  68         return( i );
  69 }
  70
  71 int
  72 destroy_replica_info(
  73         Backend         *be )
  74 {
  75         int i = 0;
  76
  77         assert( be != NULL );
  78
  79         if ( be->be_replica == NULL ) {
  80                 return 0;
  81         }
  82
  83         for ( ; be->be_replica[ i ] != NULL; i++ ) {
  84
  85                 ch_free( (char *)be->be_replica[ i ]->ri_uri );
  86
  87                 ber_bvarray_free( be->be_replica[ i ]->ri_nsuffix );
  88
  89                 if ( be->be_replica[ i ]->ri_attrs ) {
  90                         AttributeName   *an = be->be_replica[ i ]->ri_attrs;
  91                         int             j;
  92
  93                         for ( j = 0; !BER_BVISNULL( &an[ j ].an_name ); j++ )
  94                         {
  95                                 ch_free( an[ j ].an_name.bv_val );
  96                         }
  97                         ch_free( an );
  98                 }
  99
 100                 bindconf_free( &be->be_replica[ i ]->ri_bindconf );
 101
 102                 ch_free( be->be_replica[ i ] );
 103         }
 104
 105         ch_free( be->be_replica );
 106
 107         return 0;
 108 }
 109
 110 int
 111 add_replica_suffix(
 112     Backend     *be,
 113     int         nr,
 114     const char  *suffix
 115 )
 116 {
 117         struct berval dn, ndn;
 118         int rc;
 119
 120         dn.bv_val = (char *) suffix;
 121         dn.bv_len = strlen( dn.bv_val );
 122
 123         rc = dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL );
 124         if( rc != LDAP_SUCCESS ) {
 125                 return 2;
 126         }
 127
 128         if ( select_backend( &ndn, 0, 0 ) != be ) {
 129                 free( ndn.bv_val );
 130                 return 1;
 131         }
 132
 133         ber_bvarray_add( &be->be_replica[nr]->ri_nsuffix, &ndn );
 134         return 0;
 135 }
 136
 137 int
 138 add_replica_attrs(
 139         Backend *be,
 140         int     nr,
 141         char    *attrs,
 142         int     exclude
 143 )
 144 {
 145         if ( be->be_replica[nr]->ri_attrs != NULL ) {
 146                 if ( be->be_replica[nr]->ri_exclude != exclude ) {
 147                         fprintf( stderr, "attr selective replication directive '%s' conflicts with previous one (discarded)\n", attrs );
 148                         ch_free( be->be_replica[nr]->ri_attrs );
 149                         be->be_replica[nr]->ri_attrs = NULL;
 150                 }
 151         }
 152
 153         be->be_replica[nr]->ri_exclude = exclude;
 154         be->be_replica[nr]->ri_attrs = str2anlist( be->be_replica[nr]->ri_attrs,
 155                 attrs, "," );
 156         return ( be->be_replica[nr]->ri_attrs == NULL );
 157 }
 158
 159 static void
 160 print_vals( FILE *fp, struct berval *type, struct berval *bv );
 161 static void
 162 replog1( struct slap_replica_info *ri, Operation *op, FILE *fp, long now);
 163
 164 void
 165 replog( Operation *op )
 166 {
 167         FILE    *fp, *lfp;
 168         int     i;
 169 /* undef NO_LOG_WHEN_NO_REPLICAS */
 170 #ifdef NO_LOG_WHEN_NO_REPLICAS
 171         int     count = 0;
 172 #endif
 173         int     subsets = 0;
 174         long    now = slap_get_time();
 175         char    *replogfile;
 176
 177         replogfile = op->o_bd->be_replogfile ? op->o_bd->be_replogfile :
 178                 frontendDB->be_replogfile;
 179         if ( !replogfile ) {
 180                 return;
 181         }
 182
 183         ldap_pvt_thread_mutex_lock( &replog_mutex );
 184         if ( (fp = lock_fopen( replogfile, "a", &lfp )) == NULL ) {
 185                 ldap_pvt_thread_mutex_unlock( &replog_mutex );
 186                 return;
 187         }
 188
 189         for ( i = 0; op->o_bd->be_replica != NULL && op->o_bd->be_replica[i] != NULL; i++ ) {
 190                 /* check if dn's suffix matches legal suffixes, if any */
 191                 if ( op->o_bd->be_replica[i]->ri_nsuffix != NULL ) {
 192                         int j;
 193
 194                         for ( j = 0; op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val; j++ ) {
 195                                 if ( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_replica[i]->ri_nsuffix[j] ) ) {
 196                                         break;
 197                                 }
 198                         }
 199
 200                         if ( !op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val ) {
 201                                 /* do not add "replica:" line */
 202                                 continue;
 203                         }
 204                 }
 205                 /* See if we only want a subset of attributes */
 206                 if ( op->o_bd->be_replica[i]->ri_attrs != NULL &&
 207                         ( op->o_tag == LDAP_REQ_MODIFY || op->o_tag == LDAP_REQ_ADD || op->o_tag == LDAP_REQ_EXTENDED ) ) {
 208                         if ( !subsets ) {
 209                                 subsets = i + 1;
 210                         }
 211                         /* Do attribute subsets by themselves in a second pass */
 212                         continue;
 213                 }
 214
 215                 fprintf( fp, "replica: %s\n", op->o_bd->be_replica[i]->ri_host );
 216 #ifdef NO_LOG_WHEN_NO_REPLICAS
 217                 ++count;
 218 #endif
 219         }
 220
 221 #ifdef NO_LOG_WHEN_NO_REPLICAS
 222         if ( count == 0 && subsets == 0 ) {
 223                 /* if no replicas matched, drop the log
 224                  * (should we log it anyway?) */
 225                 lock_fclose( fp, lfp );
 226                 ldap_pvt_thread_mutex_unlock( &replog_mutex );
 227
 228                 return;
 229         }
 230 #endif
 231
 232         replog1( NULL, op, fp, now );
 233
 234         if ( subsets > 0 ) {
 235                 for ( i = subsets - 1; op->o_bd->be_replica[i] != NULL; i++ ) {
 236
 237                         /* If no attrs, we already did this above */
 238                         if ( op->o_bd->be_replica[i]->ri_attrs == NULL ) {
 239                                 continue;
 240                         }
 241
 242                         /* check if dn's suffix matches legal suffixes, if any */
 243                         if ( op->o_bd->be_replica[i]->ri_nsuffix != NULL ) {
 244                                 int j;
 245
 246                                 for ( j = 0; op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val; j++ ) {
 247                                         if ( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_replica[i]->ri_nsuffix[j] ) ) {
 248                                                 break;
 249                                         }
 250                                 }
 251
 252                                 if ( !op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val ) {
 253                                         /* no matching suffix found, skip it */
 254                                         continue;
 255                                 }
 256                         }
 257                         switch( op->o_tag ) {
 258                         case LDAP_REQ_EXTENDED:
 259                                 /* quick hack for extended operations */
 260                                 /* assume change parameter is a Modifications* */
 261                                 /* fall thru */
 262                         case LDAP_REQ_MODIFY:
 263                         case LDAP_REQ_ADD:
 264                                 break;
 265                         default:
 266                                 /* Other operations were logged in the first pass */
 267                                 continue;
 268                         }
 269                         replog1( op->o_bd->be_replica[i], op, fp, now );
 270                 }
 271         }
 272
 273         lock_fclose( fp, lfp );
 274         ldap_pvt_thread_mutex_unlock( &replog_mutex );
 275 }
 276
 277 static void
 278 rephdr(
 279         struct slap_replica_info *ri,
 280         Operation *op,
 281         FILE *fp,
 282         long now
 283 )
 284 {
 285         if ( ri ) {
 286                 fprintf( fp, "replica: %s\n", ri->ri_host );
 287         }
 288         fprintf( fp, "time: %ld\n", now );
 289         fprintf( fp, "dn: %s\n", op->o_req_dn.bv_val );
 290 }
 291
 292 static void
 293 replog1(
 294         struct slap_replica_info *ri,
 295         Operation *op,
 296         FILE    *fp,
 297         long    now
 298 )
 299 {
 300         Modifications   *ml;
 301         Attribute       *a;
 302         AttributeName   *an;
 303         int             dohdr = 1, ocs = -1;
 304         struct berval vals[2];
 305
 306         vals[1].bv_val = NULL;
 307         vals[1].bv_len = 0;
 308
 309         switch ( op->o_tag ) {
 310         case LDAP_REQ_EXTENDED:
 311                 /* quick hack for extended operations */
 312                 /* assume change parameter is a Modifications* */
 313                 /* fall thru */
 314
 315         case LDAP_REQ_MODIFY:
 316                 for ( ml = op->orm_modlist; ml != NULL; ml = ml->sml_next ) {
 317                         char *did = NULL, *type = ml->sml_desc->ad_cname.bv_val;
 318                         switch ( ml->sml_op ) {
 319                         case LDAP_MOD_ADD:
 320                                 did = "add"; break;
 321
 322                         case LDAP_MOD_DELETE:
 323                                 did = "delete"; break;
 324
 325                         case LDAP_MOD_REPLACE:
 326                                 did = "replace"; break;
 327
 328                         case LDAP_MOD_INCREMENT:
 329                                 did = "increment"; break;
 330                         }
 331                         if ( ri && ri->ri_attrs ) {
 332                                 int is_in = ad_inlist( ml->sml_desc, ri->ri_attrs );
 333
 334                                 if ( ( !is_in && !ri->ri_exclude )
 335                                         || ( is_in && ri->ri_exclude ) )
 336                                 {
 337                                         continue;
 338                                 }
 339                                 /* If this is objectClass, see if the value is included
 340                                  * in any subset, otherwise drop it.
 341                                  */
 342                                 if ( ocs && ml->sml_desc == slap_schema.si_ad_objectClass
 343                                         && ml->sml_values )
 344                                 {
 345                                         int i, first = 1;
 346
 347                                         if ( ocs == -1 ) ocs = 0;
 348
 349                                         for ( i=0; ml->sml_values[i].bv_val; i++ ) {
 350                                                 int match = 0;
 351                                                 for ( an = ri->ri_attrs; an->an_name.bv_val; an++ ) {
 352                                                         if ( an->an_oc ) {
 353                                                                 ocs = 1;
 354                                                                 match |= an->an_oc_exclude;
 355                                                                 if ( ml->sml_values[i].bv_len == an->an_name.bv_len
 356                                                                         && !strcasecmp(ml->sml_values[i].bv_val,
 357                                                                                 an->an_name.bv_val ) ) {
 358                                                                         match = !an->an_oc_exclude;
 359                                                                         break;
 360                                                                 }
 361                                                         }
 362                                                 }
 363                                                 /* Objectclasses need no special treatment, drop into
 364                                                  * regular processing
 365                                                  */
 366                                                 if ( !ocs ) break;
 367
 368                                                 match ^= ri->ri_exclude;
 369                                                 /* Found a match, log it */
 370                                                 if ( match ) {
 371                                                         if ( dohdr ) {
 372                                                                 rephdr( ri, op, fp, now );
 373                                                                 fprintf( fp, "changetype: modify\n" );
 374                                                                 dohdr = 0;
 375                                                         }
 376                                                         if ( first ) {
 377                                                                 fprintf( fp, "%s: %s\n", did, type );
 378                                                                 first = 0;
 379                                                         }
 380                                                         vals[0] = an->an_name;
 381                                                         print_vals( fp, &ml->sml_desc->ad_cname, vals );
 382                                                         ocs = 2;
 383                                                 }
 384
 385                                         }
 386                                         /* Explicit objectclasses have been handled already */
 387                                         if ( ocs ) {
 388                                                 if ( ocs == 2 ) {
 389                                                         fprintf( fp, "-\n" );
 390                                                 }
 391                                                 continue;
 392                                         }
 393                                 }
 394                         }
 395                         if ( dohdr ) {
 396                                 rephdr( ri, op, fp, now );
 397                                 fprintf( fp, "changetype: modify\n" );
 398                                 dohdr = 0;
 399                         }
 400                         fprintf( fp, "%s: %s\n", did, type );
 401                         if ( ml->sml_values ) {
 402                                 print_vals( fp, &ml->sml_desc->ad_cname, ml->sml_values );
 403                         }
 404                         fprintf( fp, "-\n" );
 405                 }
 406                 break;
 407
 408         case LDAP_REQ_ADD:
 409                 for ( a = op->ora_e->e_attrs ; a != NULL; a=a->a_next ) {
 410                         if ( ri && ri->ri_attrs ) {
 411                                 int is_in = ad_inlist( a->a_desc, ri->ri_attrs );
 412                                 if ( ( !is_in && !ri->ri_exclude ) || ( is_in && ri->ri_exclude ) ) {
 413                                         continue;
 414                                 }
 415
 416                                 /* If the list includes objectClass names,
 417                                  * only include those classes in the
 418                                  * objectClass attribute
 419                                  */
 420                                 if ( ocs && a->a_desc == slap_schema.si_ad_objectClass ) {
 421                                         int i;
 422
 423                                         if ( ocs == -1 ) ocs = 0;
 424
 425                                         for ( i=0; a->a_vals[i].bv_val; i++ ) {
 426                                                 int match = 0;
 427                                                 for ( an = ri->ri_attrs; an->an_name.bv_val; an++ ) {
 428                                                         if ( an->an_oc ) {
 429                                                                 ocs = 1;
 430                                                                 match |= an->an_oc_exclude;
 431                                                                 if ( a->a_vals[i].bv_len == an->an_name.bv_len
 432                                                                         && !strcasecmp(a->a_vals[i].bv_val,
 433                                                                                 an->an_name.bv_val ) ) {
 434                                                                         match = !an->an_oc_exclude;
 435                                                                         break;
 436                                                                 }
 437                                                         }
 438                                                 }
 439                                                 if ( !ocs ) break;
 440
 441                                                 match ^= ri->ri_exclude;
 442                                                 if ( match ) {
 443                                                         if ( dohdr ) {
 444                                                                 rephdr( ri, op, fp, now );
 445                                                                 fprintf( fp, "changetype: add\n" );
 446                                                                 dohdr = 0;
 447                                                         }
 448                                                         vals[0] = an->an_name;
 449                                                         print_vals( fp, &a->a_desc->ad_cname, vals );
 450                                                 }
 451                                         }
 452                                         if ( ocs ) continue;
 453                                 }
 454                         }
 455                         if ( dohdr ) {
 456                                 rephdr( ri, op, fp, now );
 457                                 fprintf( fp, "changetype: add\n" );
 458                                 dohdr = 0;
 459                         }
 460                         print_vals( fp, &a->a_desc->ad_cname, a->a_vals );
 461                 }
 462                 break;
 463
 464         case LDAP_REQ_DELETE:
 465                 rephdr( ri, op, fp, now );
 466                 fprintf( fp, "changetype: delete\n" );
 467                 break;
 468
 469         case LDAP_REQ_MODRDN:
 470                 rephdr( ri, op, fp, now );
 471                 fprintf( fp, "changetype: modrdn\n" );
 472                 fprintf( fp, "newrdn: %s\n", op->orr_newrdn.bv_val );
 473                 fprintf( fp, "deleteoldrdn: %d\n", op->orr_deleteoldrdn ? 1 : 0 );
 474                 if( op->orr_newSup != NULL ) {
 475                         fprintf( fp, "newsuperior: %s\n", op->orr_newSup->bv_val );
 476                 }
 477         }
 478         fprintf( fp, "\n" );
 479 }
 480
 481 static void
 482 print_vals(
 483         FILE *fp,
 484         struct berval *type,
 485         struct berval *bv )
 486 {
 487         ber_len_t i, len;
 488         char    *buf, *bufp;
 489
 490         for ( i = 0, len = 0; bv && bv[i].bv_val; i++ ) {
 491                 if ( bv[i].bv_len > len )
 492                         len = bv[i].bv_len;
 493         }
 494
 495         len = LDIF_SIZE_NEEDED( type->bv_len, len ) + 1;
 496         buf = (char *) ch_malloc( len );
 497
 498         for ( ; bv && bv->bv_val; bv++ ) {
 499                 bufp = buf;
 500                 ldif_sput( &bufp, LDIF_PUT_VALUE, type->bv_val,
 501                                     bv->bv_val, bv->bv_len );
 502                 *bufp = '\0';
 503
 504                 fputs( buf, fp );
 505
 506         }
 507         free( buf );
 508 }