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 1998-2004 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  *host
  46 )
  47 {
  48         int i = 0;
  49
  50         assert( be );
  51         assert( host );
  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_host = ch_strdup( host );
  63         be->be_replica[ i ]->ri_nsuffix = NULL;
  64         be->be_replica[ i ]->ri_attrs = NULL;
  65         be->be_replica[ i + 1 ] = NULL;
  66
  67         return( i );
  68 }
  69
  70 int
  71 add_replica_suffix(
  72     Backend     *be,
  73     int         nr,
  74     const char  *suffix
  75 )
  76 {
  77         struct berval dn, ndn;
  78         int rc;
  79
  80         dn.bv_val = (char *) suffix;
  81         dn.bv_len = strlen( dn.bv_val );
  82
  83         rc = dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL );
  84         if( rc != LDAP_SUCCESS ) {
  85                 return 2;
  86         }
  87
  88         if ( select_backend( &ndn, 0, 0 ) != be ) {
  89                 free( ndn.bv_val );
  90                 return 1;
  91         }
  92
  93         ber_bvarray_add( &be->be_replica[nr]->ri_nsuffix, &ndn );
  94         return 0;
  95 }
  96
  97 int
  98 add_replica_attrs(
  99         Backend *be,
 100         int     nr,
 101         char    *attrs,
 102         int     exclude
 103 )
 104 {
 105         if ( be->be_replica[nr]->ri_attrs != NULL ) {
 106                 if ( be->be_replica[nr]->ri_exclude != exclude ) {
 107                         fprintf( stderr, "attr selective replication directive '%s' conflicts with previous one (discarded)\n", attrs );
 108                         ch_free( be->be_replica[nr]->ri_attrs );
 109                         be->be_replica[nr]->ri_attrs = NULL;
 110                 }
 111         }
 112
 113         be->be_replica[nr]->ri_exclude = exclude;
 114         be->be_replica[nr]->ri_attrs = str2anlist( be->be_replica[nr]->ri_attrs,
 115                 attrs, "," );
 116         return ( be->be_replica[nr]->ri_attrs == NULL );
 117 }
 118
 119 static void
 120 print_vals( FILE *fp, struct berval *type, struct berval *bv );
 121 static void
 122 replog1( struct slap_replica_info *ri, Operation *op, FILE *fp, long now);
 123
 124 void
 125 replog( Operation *op )
 126 {
 127         Modifications   *ml = NULL;
 128         Attribute       *a = NULL;
 129         FILE    *fp, *lfp;
 130         int     i;
 131 /* undef NO_LOG_WHEN_NO_REPLICAS */
 132 #ifdef NO_LOG_WHEN_NO_REPLICAS
 133         int     count = 0;
 134 #endif
 135         int     subsets = 0;
 136         long now = slap_get_time();
 137
 138         if ( op->o_bd->be_replogfile == NULL && frontendDB->be_replogfile == NULL ) {
 139                 return;
 140         }
 141
 142         ldap_pvt_thread_mutex_lock( &SLAPD_GLOBAL(replog_mutex) );
 143         if ( (fp = lock_fopen( op->o_bd->be_replogfile ? op->o_bd->be_replogfile :
 144             frontendDB->be_replogfile, "a", &lfp )) == NULL ) {
 145                 ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(replog_mutex) );
 146                 return;
 147         }
 148
 149         for ( i = 0; op->o_bd->be_replica != NULL && op->o_bd->be_replica[i] != NULL; i++ ) {
 150                 /* check if dn's suffix matches legal suffixes, if any */
 151                 if ( op->o_bd->be_replica[i]->ri_nsuffix != NULL ) {
 152                         int j;
 153
 154                         for ( j = 0; op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val; j++ ) {
 155                                 if ( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_replica[i]->ri_nsuffix[j] ) ) {
 156                                         break;
 157                                 }
 158                         }
 159
 160                         if ( !op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val ) {
 161                                 /* do not add "replica:" line */
 162                                 continue;
 163                         }
 164                 }
 165                 /* See if we only want a subset of attributes */
 166                 if ( op->o_bd->be_replica[i]->ri_attrs != NULL &&
 167                         ( op->o_tag == LDAP_REQ_MODIFY || op->o_tag == LDAP_REQ_ADD || op->o_tag == LDAP_REQ_EXTENDED ) ) {
 168                         if ( !subsets ) {
 169                                 subsets = i + 1;
 170                         }
 171                         /* Do attribute subsets by themselves in a second pass */
 172                         continue;
 173                 }
 174
 175                 fprintf( fp, "replica: %s\n", op->o_bd->be_replica[i]->ri_host );
 176 #ifdef NO_LOG_WHEN_NO_REPLICAS
 177                 ++count;
 178 #endif
 179         }
 180
 181 #ifdef NO_LOG_WHEN_NO_REPLICAS
 182         if ( count == 0 && subsets == 0 ) {
 183                 /* if no replicas matched, drop the log
 184                  * (should we log it anyway?) */
 185                 lock_fclose( fp, lfp );
 186                 ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(replog_mutex) );
 187
 188                 return;
 189         }
 190 #endif
 191
 192         replog1( NULL, op, fp, now );
 193
 194         if ( subsets > 0 ) {
 195                 for ( i = subsets - 1; op->o_bd->be_replica[i] != NULL; i++ ) {
 196
 197                         /* If no attrs, we already did this above */
 198                         if ( op->o_bd->be_replica[i]->ri_attrs == NULL ) {
 199                                 continue;
 200                         }
 201
 202                         /* check if dn's suffix matches legal suffixes, if any */
 203                         if ( op->o_bd->be_replica[i]->ri_nsuffix != NULL ) {
 204                                 int j;
 205
 206                                 for ( j = 0; op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val; j++ ) {
 207                                         if ( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_replica[i]->ri_nsuffix[j] ) ) {
 208                                                 break;
 209                                         }
 210                                 }
 211
 212                                 if ( !op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val ) {
 213                                         /* no matching suffix found, skip it */
 214                                         continue;
 215                                 }
 216                         }
 217                         switch( op->o_tag ) {
 218                         case LDAP_REQ_EXTENDED:
 219                                 /* quick hack for extended operations */
 220                                 /* assume change parameter is a Modifications* */
 221                                 /* fall thru */
 222                         case LDAP_REQ_MODIFY:
 223                         case LDAP_REQ_ADD:
 224                                 break;
 225                         default:
 226                                 /* Other operations were logged in the first pass */
 227                                 continue;
 228                         }
 229                         replog1( op->o_bd->be_replica[i], op, fp, now );
 230                 }
 231         }
 232
 233         lock_fclose( fp, lfp );
 234         ldap_pvt_thread_mutex_unlock( &SLAPD_GLOBAL(replog_mutex) );
 235 }
 236
 237 static void
 238 rephdr(
 239         struct slap_replica_info *ri,
 240         Operation *op,
 241         FILE *fp,
 242         long now
 243 )
 244 {
 245         if ( ri ) {
 246                 fprintf( fp, "replica: %s\n", ri->ri_host );
 247         }
 248         fprintf( fp, "time: %ld\n", now );
 249         fprintf( fp, "dn: %s\n", op->o_req_dn.bv_val );
 250 }
 251
 252 static void
 253 replog1(
 254         struct slap_replica_info *ri,
 255         Operation *op,
 256         FILE    *fp,
 257         long    now
 258 )
 259 {
 260         Modifications   *ml;
 261         Attribute       *a;
 262         AttributeName   *an;
 263         int             dohdr = 1, ocs = -1;
 264         struct berval vals[2];
 265
 266         vals[1].bv_val = NULL;
 267         vals[1].bv_len = 0;
 268
 269         switch ( op->o_tag ) {
 270         case LDAP_REQ_EXTENDED:
 271                 /* quick hack for extended operations */
 272                 /* assume change parameter is a Modifications* */
 273                 /* fall thru */
 274
 275         case LDAP_REQ_MODIFY:
 276                 for ( ml = op->orm_modlist; ml != NULL; ml = ml->sml_next ) {
 277                         char *did, *type = ml->sml_desc->ad_cname.bv_val;
 278                         switch ( ml->sml_op ) {
 279                         case LDAP_MOD_ADD:
 280                                 did = "add"; break;
 281
 282                         case LDAP_MOD_DELETE:
 283                                 did = "delete"; break;
 284
 285                         case LDAP_MOD_REPLACE:
 286                                 did = "replace"; break;
 287
 288                         case LDAP_MOD_INCREMENT:
 289                                 did = "increment"; break;
 290                         }
 291                         if ( ri && ri->ri_attrs ) {
 292                                 int is_in = ad_inlist( ml->sml_desc, ri->ri_attrs );
 293
 294                                 if ( ( !is_in && !ri->ri_exclude )
 295                                         || ( is_in && ri->ri_exclude ) )
 296                                 {
 297                                         continue;
 298                                 }
 299                                 /* If this is objectClass, see if the value is included
 300                                  * in any subset, otherwise drop it.
 301                                  */
 302                                 if ( ocs && ml->sml_desc == slap_schema.si_ad_objectClass
 303                                         && ml->sml_values )
 304                                 {
 305                                         int i, first = 1;
 306
 307                                         if ( ocs == -1 ) ocs = 0;
 308
 309                                         for ( i=0; ml->sml_values[i].bv_val; i++ ) {
 310                                                 int match = 0;
 311                                                 for ( an = ri->ri_attrs; an->an_name.bv_val; an++ ) {
 312                                                         if ( an->an_oc ) {
 313                                                                 ocs = 1;
 314                                                                 match |= an->an_oc_exclude;
 315                                                                 if ( ml->sml_values[i].bv_len == an->an_name.bv_len
 316                                                                         && !strcasecmp(ml->sml_values[i].bv_val,
 317                                                                                 an->an_name.bv_val ) ) {
 318                                                                         match = !an->an_oc_exclude;
 319                                                                         break;
 320                                                                 }
 321                                                         }
 322                                                 }
 323                                                 /* Objectclasses need no special treatment, drop into
 324                                                  * regular processing
 325                                                  */
 326                                                 if ( !ocs ) break;
 327
 328                                                 match ^= ri->ri_exclude;
 329                                                 /* Found a match, log it */
 330                                                 if ( match ) {
 331                                                         if ( dohdr ) {
 332                                                                 rephdr( ri, op, fp, now );
 333                                                                 fprintf( fp, "changetype: modify\n" );
 334                                                                 dohdr = 0;
 335                                                         }
 336                                                         if ( first ) {
 337                                                                 fprintf( fp, "%s: %s\n", did, type );
 338                                                                 first = 0;
 339                                                         }
 340                                                         vals[0] = an->an_name;
 341                                                         print_vals( fp, &ml->sml_desc->ad_cname, vals );
 342                                                         ocs = 2;
 343                                                 }
 344
 345                                         }
 346                                         /* Explicit objectclasses have been handled already */
 347                                         if ( ocs ) {
 348                                                 if ( ocs == 2 ) {
 349                                                         fprintf( fp, "-\n" );
 350                                                 }
 351                                                 continue;
 352                                         }
 353                                 }
 354                         }
 355                         if ( dohdr ) {
 356                                 rephdr( ri, op, fp, now );
 357                                 fprintf( fp, "changetype: modify\n" );
 358                                 dohdr = 0;
 359                         }
 360                         fprintf( fp, "%s: %s\n", did, type );
 361                         if ( ml->sml_values ) {
 362                                 print_vals( fp, &ml->sml_desc->ad_cname, ml->sml_values );
 363                         }
 364                         fprintf( fp, "-\n" );
 365                 }
 366                 break;
 367
 368         case LDAP_REQ_ADD:
 369                 for ( a = op->ora_e->e_attrs ; a != NULL; a=a->a_next ) {
 370                         if ( ri && ri->ri_attrs ) {
 371                                 int is_in = ad_inlist( a->a_desc, ri->ri_attrs );
 372                                 if ( ( !is_in && !ri->ri_exclude ) || ( is_in && ri->ri_exclude ) ) {
 373                                         continue;
 374                                 }
 375
 376                                 /* If the list includes objectClass names,
 377                                  * only include those classes in the
 378                                  * objectClass attribute
 379                                  */
 380                                 if ( ocs && a->a_desc == slap_schema.si_ad_objectClass ) {
 381                                         int i;
 382
 383                                         if ( ocs == -1 ) ocs = 0;
 384
 385                                         for ( i=0; a->a_vals[i].bv_val; i++ ) {
 386                                                 int match = 0;
 387                                                 for ( an = ri->ri_attrs; an->an_name.bv_val; an++ ) {
 388                                                         if ( an->an_oc ) {
 389                                                                 ocs = 1;
 390                                                                 match |= an->an_oc_exclude;
 391                                                                 if ( a->a_vals[i].bv_len == an->an_name.bv_len
 392                                                                         && !strcasecmp(a->a_vals[i].bv_val,
 393                                                                                 an->an_name.bv_val ) ) {
 394                                                                         match = !an->an_oc_exclude;
 395                                                                         break;
 396                                                                 }
 397                                                         }
 398                                                 }
 399                                                 if ( !ocs ) break;
 400
 401                                                 match ^= ri->ri_exclude;
 402                                                 if ( match ) {
 403                                                         if ( dohdr ) {
 404                                                                 rephdr( ri, op, fp, now );
 405                                                                 fprintf( fp, "changetype: add\n" );
 406                                                                 dohdr = 0;
 407                                                         }
 408                                                         vals[0] = an->an_name;
 409                                                         print_vals( fp, &a->a_desc->ad_cname, vals );
 410                                                 }
 411                                         }
 412                                         if ( ocs ) continue;
 413                                 }
 414                         }
 415                         if ( dohdr ) {
 416                                 rephdr( ri, op, fp, now );
 417                                 fprintf( fp, "changetype: add\n" );
 418                                 dohdr = 0;
 419                         }
 420                         print_vals( fp, &a->a_desc->ad_cname, a->a_vals );
 421                 }
 422                 break;
 423
 424         case LDAP_REQ_DELETE:
 425                 rephdr( ri, op, fp, now );
 426                 fprintf( fp, "changetype: delete\n" );
 427                 break;
 428
 429         case LDAP_REQ_MODRDN:
 430                 rephdr( ri, op, fp, now );
 431                 fprintf( fp, "changetype: modrdn\n" );
 432                 fprintf( fp, "newrdn: %s\n", op->orr_newrdn.bv_val );
 433                 fprintf( fp, "deleteoldrdn: %d\n", op->orr_deleteoldrdn ? 1 : 0 );
 434                 if( op->orr_newSup != NULL ) {
 435                         fprintf( fp, "newsuperior: %s\n", op->orr_newSup->bv_val );
 436                 }
 437         }
 438         fprintf( fp, "\n" );
 439 }
 440
 441 static void
 442 print_vals(
 443         FILE *fp,
 444         struct berval *type,
 445         struct berval *bv )
 446 {
 447         ber_len_t i, len;
 448         char    *buf, *bufp;
 449
 450         for ( i = 0, len = 0; bv && bv[i].bv_val; i++ ) {
 451                 if ( bv[i].bv_len > len )
 452                         len = bv[i].bv_len;
 453         }
 454
 455         len = LDIF_SIZE_NEEDED( type->bv_len, len ) + 1;
 456         buf = (char *) ch_malloc( len );
 457
 458         for ( ; bv && bv->bv_val; bv++ ) {
 459                 bufp = buf;
 460                 ldif_sput( &bufp, LDIF_PUT_VALUE, type->bv_val,
 461                                     bv->bv_val, bv->bv_len );
 462                 *bufp = '\0';
 463
 464                 fputs( buf, fp );
 465
 466         }
 467         free( buf );
 468 }