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

   1 /* repl.c - log modifications for replication purposes */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/string.h>
  13 #include <ac/ctype.h>
  14 #include <ac/socket.h>
  15
  16 #ifdef HAVE_SYS_FILE_H
  17 #include <sys/file.h>
  18 #endif
  19
  20 #include "slap.h"
  21 #include "ldif.h"
  22
  23 int
  24 add_replica_info(
  25     Backend     *be,
  26     const char  *host
  27 )
  28 {
  29         int i = 0;
  30
  31         assert( be );
  32         assert( host );
  33
  34         if ( be->be_replica != NULL ) {
  35                 for ( ; be->be_replica[ i ] != NULL; i++ );
  36         }
  37
  38         be->be_replica = ch_realloc( be->be_replica,
  39                 sizeof( struct slap_replica_info * )*( i + 2 ) );
  40
  41         be->be_replica[ i ]
  42                 = ch_calloc( sizeof( struct slap_replica_info ), 1 );
  43         be->be_replica[ i ]->ri_host = ch_strdup( host );
  44         be->be_replica[ i + 1 ] = NULL;
  45
  46         return( i );
  47 }
  48
  49 int
  50 add_replica_suffix(
  51     Backend     *be,
  52     int         nr,
  53     const char  *suffix
  54 )
  55 {
  56         struct berval dn, *ndn = NULL;
  57         int rc;
  58
  59         dn.bv_val = (char *) suffix;
  60         dn.bv_len = strlen( dn.bv_val );
  61
  62         rc = dnNormalize( NULL, &dn, &ndn );
  63         if( rc != LDAP_SUCCESS ) {
  64                 return 2;
  65         }
  66
  67         if ( select_backend( ndn, 0, 0 ) != be ) {
  68                 ber_bvfree( ndn );
  69                 return 1;
  70         }
  71
  72         ber_bvecadd( &be->be_replica[nr]->ri_nsuffix, ndn );
  73         return 0;
  74 }
  75
  76 int
  77 add_replica_attrs(
  78         Backend *be,
  79         int     nr,
  80         char    *attrs
  81 )
  82 {
  83         be->be_replica[nr]->ri_attrs = str2anlist( be->be_replica[nr]->ri_attrs,
  84                 attrs, "," );
  85         return ( be->be_replica[nr]->ri_attrs == NULL );
  86 }
  87
  88 static void
  89 print_vals( FILE *fp, struct berval *type, struct berval *bv );
  90 static void
  91 replog1( struct slap_replica_info *ri, Operation *op, void *change, FILE *fp, void *first);
  92
  93 void
  94 replog(
  95     Backend     *be,
  96     Operation *op,
  97     struct berval *dn,
  98     struct berval *ndn,
  99     void        *change
 100 )
 101 {
 102         Modifications   *ml = NULL;
 103         Attribute       *a = NULL;
 104         Entry   *e;
 105         FILE    *fp, *lfp;
 106         int     i;
 107 /* undef NO_LOG_WHEN_NO_REPLICAS */
 108 #ifdef NO_LOG_WHEN_NO_REPLICAS
 109         int     count = 0;
 110 #endif
 111         int     subsets = 0;
 112         long now = slap_get_time();
 113
 114         if ( be->be_replogfile == NULL && replogfile == NULL ) {
 115                 return;
 116         }
 117
 118         ldap_pvt_thread_mutex_lock( &replog_mutex );
 119         if ( (fp = lock_fopen( be->be_replogfile ? be->be_replogfile :
 120             replogfile, "a", &lfp )) == NULL ) {
 121                 ldap_pvt_thread_mutex_unlock( &replog_mutex );
 122                 return;
 123         }
 124
 125         for ( i = 0; be->be_replica != NULL && be->be_replica[i] != NULL; i++ ) {
 126                 /* check if dn's suffix matches legal suffixes, if any */
 127                 if ( be->be_replica[i]->ri_nsuffix != NULL ) {
 128                         int j;
 129
 130                         for ( j = 0; be->be_replica[i]->ri_nsuffix[j]; j++ ) {
 131                                 if ( dnIsSuffix( ndn, be->be_replica[i]->ri_nsuffix[j] ) ) {
 132                                         break;
 133                                 }
 134                         }
 135
 136                         if ( !be->be_replica[i]->ri_nsuffix[j] ) {
 137                                 /* do not add "replica:" line */
 138                                 continue;
 139                         }
 140                 }
 141                 /* See if we only want a subset of attributes */
 142                 if ( be->be_replica[i]->ri_attrs != NULL &&
 143                         ( op->o_tag == LDAP_REQ_MODIFY || op->o_tag == LDAP_REQ_ADD || op->o_tag == LDAP_REQ_EXTENDED ) ) {
 144                         if ( !subsets ) {
 145                                 subsets = i + 1;
 146                         }
 147                         /* Do attribute subsets by themselves in a second pass */
 148                         continue;
 149                 }
 150
 151                 fprintf( fp, "replica: %s\n", be->be_replica[i]->ri_host );
 152 #ifdef NO_LOG_WHEN_NO_REPLICAS
 153                 ++count;
 154 #endif
 155         }
 156
 157 #ifdef NO_LOG_WHEN_NO_REPLICAS
 158         if ( count == 0 && subsets == 0 ) {
 159                 /* if no replicas matched, drop the log
 160                  * (should we log it anyway?) */
 161                 lock_fclose( fp, lfp );
 162                 ldap_pvt_thread_mutex_unlock( &replog_mutex );
 163
 164                 return;
 165         }
 166 #endif
 167
 168         fprintf( fp, "time: %ld\n", now );
 169         fprintf( fp, "dn: %s\n", dn->bv_val );
 170
 171         replog1( NULL, op, change, fp, NULL );
 172
 173         if ( subsets > 0 ) {
 174                 void *first;
 175                 for ( i = subsets - 1; be->be_replica != NULL && be->be_replica[i] != NULL; i++ ) {
 176
 177                         /* If no attrs, we already did this above */
 178                         if ( be->be_replica[i]->ri_attrs == NULL ) {
 179                                 continue;
 180                         }
 181
 182                         /* check if dn's suffix matches legal suffixes, if any */
 183                         if ( be->be_replica[i]->ri_nsuffix != NULL ) {
 184                                 int j;
 185
 186                                 for ( j = 0; be->be_replica[i]->ri_nsuffix[j]; j++ ) {
 187                                         if ( dnIsSuffix( ndn, be->be_replica[i]->ri_nsuffix[j] ) ) {
 188                                                 break;
 189                                         }
 190                                 }
 191
 192                                 if ( !be->be_replica[i]->ri_nsuffix[j] ) {
 193                                         /* do not add "replica:" line */
 194                                         continue;
 195                                 }
 196                         }
 197                         subsets = 0;
 198                         first = NULL;
 199                         switch( op->o_tag ) {
 200                         case LDAP_REQ_EXTENDED:
 201                                 /* quick hack for extended operations */
 202                                 /* assume change parameter is a Modfications* */
 203                                 /* fall thru */
 204                         case LDAP_REQ_MODIFY:
 205                                 for ( ml = change; ml != NULL; ml = ml->sml_next ) {
 206                                         if ( ad_inlist( ml->sml_desc, be->be_replica[i]->ri_attrs ) ) {
 207                                                 subsets = 1;
 208                                                 first = ml;
 209                                                 break;
 210                                         }
 211                                 }
 212                                 if ( !subsets ) {
 213                                         continue;
 214                                 }
 215                                 break;
 216                         case LDAP_REQ_ADD:
 217                                 e = change;
 218                                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 219                                         if ( ad_inlist( a->a_desc, be->be_replica[i]->ri_attrs ) ) {
 220                                                 subsets = 1;
 221                                                 first = a;
 222                                                 break;
 223                                         }
 224                                 }
 225                                 if ( !subsets ) {
 226                                         continue;
 227                                 }
 228                                 break;
 229                         default:
 230                                 /* Other operations were logged in the first pass */
 231                                 continue;
 232                         }
 233                         fprintf( fp, "replica: %s\n", be->be_replica[i]->ri_host );
 234                         fprintf( fp, "time: %ld\n", now );
 235                         fprintf( fp, "dn: %s\n", dn->bv_val );
 236                         replog1( be->be_replica[i], op, change, fp, first );
 237                 }
 238         }
 239
 240         lock_fclose( fp, lfp );
 241         ldap_pvt_thread_mutex_unlock( &replog_mutex );
 242 }
 243
 244
 245 static void
 246 replog1(
 247     struct slap_replica_info *ri,
 248     Operation *op,
 249     void        *change,
 250     FILE        *fp,
 251         void    *first
 252 )
 253 {
 254         Modifications   *ml;
 255         Attribute       *a;
 256         Entry           *e;
 257         struct slap_replog_moddn *moddn;
 258
 259         switch ( op->o_tag ) {
 260         case LDAP_REQ_EXTENDED:
 261                 /* quick hack for extended operations */
 262                 /* assume change parameter is a Modfications* */
 263                 /* fall thru */
 264
 265         case LDAP_REQ_MODIFY:
 266                 fprintf( fp, "changetype: modify\n" );
 267                 ml = first ? first : change;
 268                 for ( ; ml != NULL; ml = ml->sml_next ) {
 269                         char *type;
 270                         if ( ri && ri->ri_attrs && !ad_inlist( ml->sml_desc, ri->ri_attrs ) ) {
 271                                 continue;
 272                         }
 273                         type = ml->sml_desc->ad_cname.bv_val;
 274                         switch ( ml->sml_op ) {
 275                         case LDAP_MOD_ADD:
 276                                 fprintf( fp, "add: %s\n", type );
 277                                 break;
 278
 279                         case LDAP_MOD_DELETE:
 280                                 fprintf( fp, "delete: %s\n", type );
 281                                 break;
 282
 283                         case LDAP_MOD_REPLACE:
 284                                 fprintf( fp, "replace: %s\n", type );
 285                                 break;
 286                         }
 287
 288                         print_vals( fp, &ml->sml_desc->ad_cname, ml->sml_bvalues );
 289                         fprintf( fp, "-\n" );
 290                 }
 291                 break;
 292
 293         case LDAP_REQ_ADD:
 294                 e = change;
 295                 fprintf( fp, "changetype: add\n" );
 296                 a = first ? first : e->e_attrs;
 297                 for ( ; a != NULL; a=a->a_next ) {
 298                         if ( ri && ri->ri_attrs && !ad_inlist( a->a_desc, ri->ri_attrs ) ) {
 299                                 continue;
 300                         }
 301                         print_vals( fp, &a->a_desc->ad_cname, a->a_vals );
 302                 }
 303                 break;
 304
 305         case LDAP_REQ_DELETE:
 306                 fprintf( fp, "changetype: delete\n" );
 307                 break;
 308
 309         case LDAP_REQ_MODRDN:
 310                 moddn = change;
 311                 fprintf( fp, "changetype: modrdn\n" );
 312                 fprintf( fp, "newrdn: %s\n", moddn->newrdn->bv_val );
 313                 fprintf( fp, "deleteoldrdn: %d\n", moddn->deloldrdn ? 1 : 0 );
 314                 if( moddn->newsup != NULL ) {
 315                         fprintf( fp, "newsuperior: %s\n", moddn->newsup->bv_val );
 316                 }
 317         }
 318         fprintf( fp, "\n" );
 319 }
 320
 321 static void
 322 print_vals(
 323         FILE *fp,
 324         struct berval *type,
 325         struct berval *bv )
 326 {
 327         int len;
 328         char    *buf, *bufp;
 329
 330         for ( ; bv && bv->bv_val; bv++ )
 331         {
 332                 len = type->bv_len;
 333                 len = LDIF_SIZE_NEEDED( len, bv->bv_len ) + 1;
 334                 buf = (char *) ch_malloc( len );
 335
 336                 bufp = buf;
 337                 ldif_sput( &bufp, LDIF_PUT_VALUE, type->bv_val,
 338                                     bv->bv_val, bv->bv_len );
 339                 *bufp = '\0';
 340
 341                 fputs( buf, fp );
 342
 343                 free( buf );
 344         }
 345 }