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 {
  49         int i = 0;
  50
  51         assert( be );
  52         assert( host );
  53
  54         if ( be->be_replica != NULL ) {
  55                 for ( ; be->be_replica[ i ] != NULL; i++ );
  56         }
  57
  58         be->be_replica = ch_realloc( be->be_replica,
  59                 sizeof( struct slap_replica_info * )*( i + 2 ) );
  60
  61         be->be_replica[ i ]
  62                 = ch_calloc( sizeof( struct slap_replica_info ), 1 );
  63         be->be_replica[ i ]->ri_uri = uri;
  64         be->be_replica[ i ]->ri_host = host;
  65         be->be_replica[ i ]->ri_nsuffix = NULL;
  66         be->be_replica[ i ]->ri_attrs = NULL;
  67         be->be_replica[ i + 1 ] = NULL;
  68
  69         return( i );
  70 }
  71
  72 int
  73 add_replica_suffix(
  74     Backend     *be,
  75     int         nr,
  76     const char  *suffix
  77 )
  78 {
  79         struct berval dn, ndn;
  80         int rc;
  81
  82         dn.bv_val = (char *) suffix;
  83         dn.bv_len = strlen( dn.bv_val );
  84
  85         rc = dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL );
  86         if( rc != LDAP_SUCCESS ) {
  87                 return 2;
  88         }
  89
  90         if ( select_backend( &ndn, 0, 0 ) != be ) {
  91                 free( ndn.bv_val );
  92                 return 1;
  93         }
  94
  95         ber_bvarray_add( &be->be_replica[nr]->ri_nsuffix, &ndn );
  96         return 0;
  97 }
  98
  99 int
 100 add_replica_attrs(
 101         Backend *be,
 102         int     nr,
 103         char    *attrs,
 104         int     exclude
 105 )
 106 {
 107         if ( be->be_replica[nr]->ri_attrs != NULL ) {
 108                 if ( be->be_replica[nr]->ri_exclude != exclude ) {
 109                         fprintf( stderr, "attr selective replication directive '%s' conflicts with previous one (discarded)\n", attrs );
 110                         ch_free( be->be_replica[nr]->ri_attrs );
 111                         be->be_replica[nr]->ri_attrs = NULL;
 112                 }
 113         }
 114
 115         be->be_replica[nr]->ri_exclude = exclude;
 116         be->be_replica[nr]->ri_attrs = str2anlist( be->be_replica[nr]->ri_attrs,
 117                 attrs, "," );
 118         return ( be->be_replica[nr]->ri_attrs == NULL );
 119 }
 120
 121 static void
 122 print_vals( FILE *fp, struct berval *type, struct berval *bv );
 123 static void
 124 replog1( struct slap_replica_info *ri, Operation *op, FILE *fp, long now);
 125
 126 void
 127 replog( Operation *op )
 128 {
 129         Modifications   *ml = NULL;
 130         Attribute       *a = NULL;
 131         FILE    *fp, *lfp;
 132         int     i;
 133 /* undef NO_LOG_WHEN_NO_REPLICAS */
 134 #ifdef NO_LOG_WHEN_NO_REPLICAS
 135         int     count = 0;
 136 #endif
 137         int     subsets = 0;
 138         long    now = slap_get_time();
 139         char    *replogfile;
 140
 141         replogfile = op->o_bd->be_replogfile ? op->o_bd->be_replogfile :
 142                 frontendDB->be_replogfile;
 143         if ( !replogfile ) {
 144                 return;
 145         }
 146
 147         ldap_pvt_thread_mutex_lock( &replog_mutex );
 148         if ( (fp = lock_fopen( replogfile, "a", &lfp )) == NULL ) {
 149                 ldap_pvt_thread_mutex_unlock( &replog_mutex );
 150                 return;
 151         }
 152
 153         for ( i = 0; op->o_bd->be_replica != NULL && op->o_bd->be_replica[i] != NULL; i++ ) {
 154                 /* check if dn's suffix matches legal suffixes, if any */
 155                 if ( op->o_bd->be_replica[i]->ri_nsuffix != NULL ) {
 156                         int j;
 157
 158                         for ( j = 0; op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val; j++ ) {
 159                                 if ( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_replica[i]->ri_nsuffix[j] ) ) {
 160                                         break;
 161                                 }
 162                         }
 163
 164                         if ( !op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val ) {
 165                                 /* do not add "replica:" line */
 166                                 continue;
 167                         }
 168                 }
 169                 /* See if we only want a subset of attributes */
 170                 if ( op->o_bd->be_replica[i]->ri_attrs != NULL &&
 171                         ( op->o_tag == LDAP_REQ_MODIFY || op->o_tag == LDAP_REQ_ADD || op->o_tag == LDAP_REQ_EXTENDED ) ) {
 172                         if ( !subsets ) {
 173                                 subsets = i + 1;
 174                         }
 175                         /* Do attribute subsets by themselves in a second pass */
 176                         continue;
 177                 }
 178
 179                 fprintf( fp, "replica: %s\n", op->o_bd->be_replica[i]->ri_host );
 180 #ifdef NO_LOG_WHEN_NO_REPLICAS
 181                 ++count;
 182 #endif
 183         }
 184
 185 #ifdef NO_LOG_WHEN_NO_REPLICAS
 186         if ( count == 0 && subsets == 0 ) {
 187                 /* if no replicas matched, drop the log
 188                  * (should we log it anyway?) */
 189                 lock_fclose( fp, lfp );
 190                 ldap_pvt_thread_mutex_unlock( &replog_mutex );
 191
 192                 return;
 193         }
 194 #endif
 195
 196         replog1( NULL, op, fp, now );
 197
 198         if ( subsets > 0 ) {
 199                 for ( i = subsets - 1; op->o_bd->be_replica[i] != NULL; i++ ) {
 200
 201                         /* If no attrs, we already did this above */
 202                         if ( op->o_bd->be_replica[i]->ri_attrs == NULL ) {
 203                                 continue;
 204                         }
 205
 206                         /* check if dn's suffix matches legal suffixes, if any */
 207                         if ( op->o_bd->be_replica[i]->ri_nsuffix != NULL ) {
 208                                 int j;
 209
 210                                 for ( j = 0; op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val; j++ ) {
 211                                         if ( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_replica[i]->ri_nsuffix[j] ) ) {
 212                                                 break;
 213                                         }
 214                                 }
 215
 216                                 if ( !op->o_bd->be_replica[i]->ri_nsuffix[j].bv_val ) {
 217                                         /* no matching suffix found, skip it */
 218                                         continue;
 219                                 }
 220                         }
 221                         switch( op->o_tag ) {
 222                         case LDAP_REQ_EXTENDED:
 223                                 /* quick hack for extended operations */
 224                                 /* assume change parameter is a Modifications* */
 225                                 /* fall thru */
 226                         case LDAP_REQ_MODIFY:
 227                         case LDAP_REQ_ADD:
 228                                 break;
 229                         default:
 230                                 /* Other operations were logged in the first pass */
 231                                 continue;
 232                         }
 233                         replog1( op->o_bd->be_replica[i], op, fp, now );
 234                 }
 235         }
 236
 237         lock_fclose( fp, lfp );
 238         ldap_pvt_thread_mutex_unlock( &replog_mutex );
 239 }
 240
 241 static void
 242 rephdr(
 243         struct slap_replica_info *ri,
 244         Operation *op,
 245         FILE *fp,
 246         long now
 247 )
 248 {
 249         if ( ri ) {
 250                 fprintf( fp, "replica: %s\n", ri->ri_host );
 251         }
 252         fprintf( fp, "time: %ld\n", now );
 253         fprintf( fp, "dn: %s\n", op->o_req_dn.bv_val );
 254 }
 255
 256 static void
 257 replog1(
 258         struct slap_replica_info *ri,
 259         Operation *op,
 260         FILE    *fp,
 261         long    now
 262 )
 263 {
 264         Modifications   *ml;
 265         Attribute       *a;
 266         AttributeName   *an;
 267         int             dohdr = 1, ocs = -1;
 268         struct berval vals[2];
 269
 270         vals[1].bv_val = NULL;
 271         vals[1].bv_len = 0;
 272
 273         switch ( op->o_tag ) {
 274         case LDAP_REQ_EXTENDED:
 275                 /* quick hack for extended operations */
 276                 /* assume change parameter is a Modifications* */
 277                 /* fall thru */
 278
 279         case LDAP_REQ_MODIFY:
 280                 for ( ml = op->orm_modlist; ml != NULL; ml = ml->sml_next ) {
 281                         char *did, *type = ml->sml_desc->ad_cname.bv_val;
 282                         switch ( ml->sml_op ) {
 283                         case LDAP_MOD_ADD:
 284                                 did = "add"; break;
 285
 286                         case LDAP_MOD_DELETE:
 287                                 did = "delete"; break;
 288
 289                         case LDAP_MOD_REPLACE:
 290                                 did = "replace"; break;
 291
 292                         case LDAP_MOD_INCREMENT:
 293                                 did = "increment"; break;
 294                         }
 295                         if ( ri && ri->ri_attrs ) {
 296                                 int is_in = ad_inlist( ml->sml_desc, ri->ri_attrs );
 297
 298                                 if ( ( !is_in && !ri->ri_exclude )
 299                                         || ( is_in && ri->ri_exclude ) )
 300                                 {
 301                                         continue;
 302                                 }
 303                                 /* If this is objectClass, see if the value is included
 304                                  * in any subset, otherwise drop it.
 305                                  */
 306                                 if ( ocs && ml->sml_desc == slap_schema.si_ad_objectClass
 307                                         && ml->sml_values )
 308                                 {
 309                                         int i, first = 1;
 310
 311                                         if ( ocs == -1 ) ocs = 0;
 312
 313                                         for ( i=0; ml->sml_values[i].bv_val; i++ ) {
 314                                                 int match = 0;
 315                                                 for ( an = ri->ri_attrs; an->an_name.bv_val; an++ ) {
 316                                                         if ( an->an_oc ) {
 317                                                                 ocs = 1;
 318                                                                 match |= an->an_oc_exclude;
 319                                                                 if ( ml->sml_values[i].bv_len == an->an_name.bv_len
 320                                                                         && !strcasecmp(ml->sml_values[i].bv_val,
 321                                                                                 an->an_name.bv_val ) ) {
 322                                                                         match = !an->an_oc_exclude;
 323                                                                         break;
 324                                                                 }
 325                                                         }
 326                                                 }
 327                                                 /* Objectclasses need no special treatment, drop into
 328                                                  * regular processing
 329                                                  */
 330                                                 if ( !ocs ) break;
 331
 332                                                 match ^= ri->ri_exclude;
 333                                                 /* Found a match, log it */
 334                                                 if ( match ) {
 335                                                         if ( dohdr ) {
 336                                                                 rephdr( ri, op, fp, now );
 337                                                                 fprintf( fp, "changetype: modify\n" );
 338                                                                 dohdr = 0;
 339                                                         }
 340                                                         if ( first ) {
 341                                                                 fprintf( fp, "%s: %s\n", did, type );
 342                                                                 first = 0;
 343                                                         }
 344                                                         vals[0] = an->an_name;
 345                                                         print_vals( fp, &ml->sml_desc->ad_cname, vals );
 346                                                         ocs = 2;
 347                                                 }
 348
 349                                         }
 350                                         /* Explicit objectclasses have been handled already */
 351                                         if ( ocs ) {
 352                                                 if ( ocs == 2 ) {
 353                                                         fprintf( fp, "-\n" );
 354                                                 }
 355                                                 continue;
 356                                         }
 357                                 }
 358                         }
 359                         if ( dohdr ) {
 360                                 rephdr( ri, op, fp, now );
 361                                 fprintf( fp, "changetype: modify\n" );
 362                                 dohdr = 0;
 363                         }
 364                         fprintf( fp, "%s: %s\n", did, type );
 365                         if ( ml->sml_values ) {
 366                                 print_vals( fp, &ml->sml_desc->ad_cname, ml->sml_values );
 367                         }
 368                         fprintf( fp, "-\n" );
 369                 }
 370                 break;
 371
 372         case LDAP_REQ_ADD:
 373                 for ( a = op->ora_e->e_attrs ; a != NULL; a=a->a_next ) {
 374                         if ( ri && ri->ri_attrs ) {
 375                                 int is_in = ad_inlist( a->a_desc, ri->ri_attrs );
 376                                 if ( ( !is_in && !ri->ri_exclude ) || ( is_in && ri->ri_exclude ) ) {
 377                                         continue;
 378                                 }
 379
 380                                 /* If the list includes objectClass names,
 381                                  * only include those classes in the
 382                                  * objectClass attribute
 383                                  */
 384                                 if ( ocs && a->a_desc == slap_schema.si_ad_objectClass ) {
 385                                         int i;
 386
 387                                         if ( ocs == -1 ) ocs = 0;
 388
 389                                         for ( i=0; a->a_vals[i].bv_val; i++ ) {
 390                                                 int match = 0;
 391                                                 for ( an = ri->ri_attrs; an->an_name.bv_val; an++ ) {
 392                                                         if ( an->an_oc ) {
 393                                                                 ocs = 1;
 394                                                                 match |= an->an_oc_exclude;
 395                                                                 if ( a->a_vals[i].bv_len == an->an_name.bv_len
 396                                                                         && !strcasecmp(a->a_vals[i].bv_val,
 397                                                                                 an->an_name.bv_val ) ) {
 398                                                                         match = !an->an_oc_exclude;
 399                                                                         break;
 400                                                                 }
 401                                                         }
 402                                                 }
 403                                                 if ( !ocs ) break;
 404
 405                                                 match ^= ri->ri_exclude;
 406                                                 if ( match ) {
 407                                                         if ( dohdr ) {
 408                                                                 rephdr( ri, op, fp, now );
 409                                                                 fprintf( fp, "changetype: add\n" );
 410                                                                 dohdr = 0;
 411                                                         }
 412                                                         vals[0] = an->an_name;
 413                                                         print_vals( fp, &a->a_desc->ad_cname, vals );
 414                                                 }
 415                                         }
 416                                         if ( ocs ) continue;
 417                                 }
 418                         }
 419                         if ( dohdr ) {
 420                                 rephdr( ri, op, fp, now );
 421                                 fprintf( fp, "changetype: add\n" );
 422                                 dohdr = 0;
 423                         }
 424                         print_vals( fp, &a->a_desc->ad_cname, a->a_vals );
 425                 }
 426                 break;
 427
 428         case LDAP_REQ_DELETE:
 429                 rephdr( ri, op, fp, now );
 430                 fprintf( fp, "changetype: delete\n" );
 431                 break;
 432
 433         case LDAP_REQ_MODRDN:
 434                 rephdr( ri, op, fp, now );
 435                 fprintf( fp, "changetype: modrdn\n" );
 436                 fprintf( fp, "newrdn: %s\n", op->orr_newrdn.bv_val );
 437                 fprintf( fp, "deleteoldrdn: %d\n", op->orr_deleteoldrdn ? 1 : 0 );
 438                 if( op->orr_newSup != NULL ) {
 439                         fprintf( fp, "newsuperior: %s\n", op->orr_newSup->bv_val );
 440                 }
 441         }
 442         fprintf( fp, "\n" );
 443 }
 444
 445 static void
 446 print_vals(
 447         FILE *fp,
 448         struct berval *type,
 449         struct berval *bv )
 450 {
 451         ber_len_t i, len;
 452         char    *buf, *bufp;
 453
 454         for ( i = 0, len = 0; bv && bv[i].bv_val; i++ ) {
 455                 if ( bv[i].bv_len > len )
 456                         len = bv[i].bv_len;
 457         }
 458
 459         len = LDIF_SIZE_NEEDED( type->bv_len, len ) + 1;
 460         buf = (char *) ch_malloc( len );
 461
 462         for ( ; bv && bv->bv_val; bv++ ) {
 463                 bufp = buf;
 464                 ldif_sput( &bufp, LDIF_PUT_VALUE, type->bv_val,
 465                                     bv->bv_val, bv->bv_len );
 466                 *bufp = '\0';
 467
 468                 fputs( buf, fp );
 469
 470         }
 471         free( buf );
 472 }