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