git.sur5r.net Git - openldap/blob - servers/slapd/back-ldbm/id2entry.c

   1 /* id2entry.c - routines to deal with the id2entry index */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2000 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/socket.h>
  13
  14 #include "slap.h"
  15 #include "back-ldbm.h"
  16
  17 /*
  18  * This routine adds (or updates) an entry on disk.
  19  * The cache should already be updated.
  20  */
  21
  22 int
  23 id2entry_add( Backend *be, Entry *e )
  24 {
  25         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  26         DBCache *db;
  27         Datum           key, data;
  28         int             len, rc, flags;
  29
  30         ldbm_datum_init( key );
  31         ldbm_datum_init( data );
  32
  33 #ifdef NEW_LOGGING
  34         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
  35                    "id2entry_add: (%s)%ld\n", e->e_dn, e->e_id ));
  36 #else
  37         Debug( LDAP_DEBUG_TRACE, "=> id2entry_add( %ld, \"%s\" )\n", e->e_id,
  38             e->e_dn, 0 );
  39 #endif
  40
  41
  42         if ( (db = ldbm_cache_open( be, "id2entry", LDBM_SUFFIX, LDBM_WRCREAT ))
  43             == NULL ) {
  44 #ifdef NEW_LOGGING
  45                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
  46                            "id2entry_add: could not open/create id2entry%s\n",
  47                            LDBM_SUFFIX ));
  48 #else
  49                 Debug( LDAP_DEBUG_ANY, "Could not open/create id2entry%s\n",
  50                     LDBM_SUFFIX, 0, 0 );
  51 #endif
  52
  53                 return( -1 );
  54         }
  55
  56         key.dptr = (char *) &e->e_id;
  57         key.dsize = sizeof(ID);
  58
  59         ldap_pvt_thread_mutex_lock( &entry2str_mutex );
  60         data.dptr = entry2str( e, &len );
  61         data.dsize = len + 1;
  62
  63         /* store it */
  64         flags = LDBM_REPLACE;
  65         rc = ldbm_cache_store( db, key, data, flags );
  66
  67         ldap_pvt_thread_mutex_unlock( &entry2str_mutex );
  68
  69         ldbm_cache_close( be, db );
  70
  71 #ifdef NEW_LOGGING
  72         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
  73                    "id2entry_add: return %d\n", rc ));
  74 #else
  75         Debug( LDAP_DEBUG_TRACE, "<= id2entry_add %d\n", rc, 0, 0 );
  76 #endif
  77
  78
  79         return( rc );
  80 }
  81
  82 int
  83 id2entry_delete( Backend *be, Entry *e )
  84 {
  85         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  86         DBCache *db;
  87         Datum           key;
  88         int             rc;
  89
  90 #ifdef NEW_LOGGING
  91         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
  92                    "id2entry_delete: (%s)%ld\n", e->e_dn, e->e_id ));
  93 #else
  94         Debug(LDAP_DEBUG_TRACE, "=> id2entry_delete( %ld, \"%s\" )\n", e->e_id,
  95             e->e_dn, 0 );
  96 #endif
  97
  98
  99 #ifdef notdef
 100 #ifdef LDAP_RDWR_DEBUG
 101         /* check for writer lock */
 102         assert(ldap_pvt_thread_rdwr_writers(&e->e_rdwr) == 1);
 103 #endif
 104 #endif
 105
 106         ldbm_datum_init( key );
 107
 108         if ( (db = ldbm_cache_open( be, "id2entry", LDBM_SUFFIX, LDBM_WRCREAT ))
 109                 == NULL ) {
 110 #ifdef NEW_LOGGING
 111                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 112                            "id2entry_delete: could not open/create id2entry%s\n",
 113                            LDBM_SUFFIX ));
 114 #else
 115                 Debug( LDAP_DEBUG_ANY, "Could not open/create id2entry%s\n",
 116                     LDBM_SUFFIX, 0, 0 );
 117 #endif
 118
 119                 return( -1 );
 120         }
 121
 122         if ( cache_delete_entry( &li->li_cache, e ) != 0 ) {
 123 #ifdef NEW_LOGGING
 124                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 125                            "id2entry_delete: Could not delete (%s)%ld from cache\n",
 126                            e->e_dn, e->e_id ));
 127 #else
 128                 Debug(LDAP_DEBUG_ANY, "could not delete %ld (%s) from cache\n",
 129                     e->e_id, e->e_dn, 0 );
 130 #endif
 131
 132         }
 133
 134         key.dptr = (char *) &e->e_id;
 135         key.dsize = sizeof(ID);
 136
 137         rc = ldbm_cache_delete( db, key );
 138
 139         ldbm_cache_close( be, db );
 140
 141 #ifdef NEW_LOGGING
 142         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 143                    "id2entry_delete: return %d\n", rc ));
 144 #else
 145         Debug( LDAP_DEBUG_TRACE, "<= id2entry_delete %d\n", rc, 0, 0 );
 146 #endif
 147
 148         return( rc );
 149 }
 150
 151 /* returns entry with reader/writer lock */
 152 Entry *
 153 id2entry_rw( Backend *be, ID id, int rw )
 154 {
 155         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
 156         DBCache *db;
 157         Datum           key, data;
 158         Entry           *e;
 159
 160         ldbm_datum_init( key );
 161         ldbm_datum_init( data );
 162
 163 #ifdef NEW_LOGGING
 164         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 165                    "id2entry_rw: %s (%ld)\n",
 166                    rw ? "write" : "read", id ));
 167 #else
 168         Debug( LDAP_DEBUG_TRACE, "=> id2entry_%s( %ld )\n",
 169                 rw ? "w" : "r", id, 0 );
 170 #endif
 171
 172
 173         if ( (e = cache_find_entry_id( &li->li_cache, id, rw )) != NULL ) {
 174 #ifdef NEW_LOGGING
 175                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 176                            "id2entry_rw: %s (%ld) 0x%lx (cache).\n",
 177                            rw ? "write" : "read", id, (unsigned long)e ));
 178 #else
 179                 Debug( LDAP_DEBUG_TRACE, "<= id2entry_%s( %ld ) 0x%lx (cache)\n",
 180                         rw ? "w" : "r", id, (unsigned long) e );
 181 #endif
 182
 183                 return( e );
 184         }
 185
 186         if ( (db = ldbm_cache_open( be, "id2entry", LDBM_SUFFIX, LDBM_WRCREAT ))
 187                 == NULL ) {
 188 #ifdef NEW_LOGGING
 189                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 190                            "id2entry_rw: could not open id2entry%s\n", LDBM_SUFFIX ));
 191 #else
 192                 Debug( LDAP_DEBUG_ANY, "Could not open id2entry%s\n",
 193                     LDBM_SUFFIX, 0, 0 );
 194 #endif
 195
 196                 return( NULL );
 197         }
 198
 199         key.dptr = (char *) &id;
 200         key.dsize = sizeof(ID);
 201
 202         data = ldbm_cache_fetch( db, key );
 203
 204         if ( data.dptr == NULL ) {
 205 #ifdef NEW_LOGGING
 206                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 207                            "id2entry_rw: (%ld) not found\n", id ));
 208 #else
 209                 Debug( LDAP_DEBUG_TRACE, "<= id2entry_%s( %ld ) not found\n",
 210                         rw ? "w" : "r", id, 0 );
 211 #endif
 212
 213                 ldbm_cache_close( be, db );
 214                 return( NULL );
 215         }
 216
 217         e = str2entry( data.dptr );
 218         ldbm_datum_free( db->dbc_db, data );
 219         ldbm_cache_close( be, db );
 220
 221         if ( e == NULL ) {
 222 #ifdef NEW_LOGGING
 223                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 224                            "id2entry_rw: %s of %ld failed\n",
 225                            rw ? "write" : "read", id ));
 226 #else
 227                 Debug( LDAP_DEBUG_TRACE, "<= id2entry_%s( %ld ) (failed)\n",
 228                         rw ? "w" : "r", id, 0 );
 229 #endif
 230
 231                 return( NULL );
 232         }
 233
 234         e->e_id = id;
 235
 236         if( cache_add_entry_rw( &li->li_cache, e, rw ) != 0 ) {
 237                 entry_free( e );
 238
 239                 /* XXX this is a kludge.
 240                  * maybe the entry got added underneath us
 241                  * There are many underlying race condtions in the cache/disk code.
 242                  */
 243                 if ( (e = cache_find_entry_id( &li->li_cache, id, rw )) != NULL ) {
 244 #ifdef NEW_LOGGING
 245                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 246                                    "id2entry_rw: %s of %ld 0x%lx (cache)\n",
 247                                    rw ? "write" : "read", id, (unsigned long)e ));
 248 #else
 249                         Debug( LDAP_DEBUG_TRACE, "<= id2entry_%s( %ld ) 0x%lx (cache)\n",
 250                                 rw ? "w" : "r", id, (unsigned long) e );
 251 #endif
 252
 253                         return( e );
 254                 }
 255
 256 #ifdef NEW_LOGGING
 257                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 258                            "id2entry_rw: %s of %ld (cache add failed)\n",
 259                            rw ? "write" : "read", id ));
 260 #else
 261                 Debug( LDAP_DEBUG_TRACE, "<= id2entry_%s( %ld ) (cache add failed)\n",
 262                         rw ? "w" : "r", id, 0 );
 263 #endif
 264
 265                 return NULL;
 266         }
 267
 268 #ifdef NEW_LOGGING
 269         LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
 270                    "id2entry_rw: %s of %ld 0x%lx (disk)\n",
 271                    rw ? "write" : "read", id, (unsigned long)e ));
 272 #else
 273         Debug( LDAP_DEBUG_TRACE, "<= id2entry_%s( %ld ) 0x%lx (disk)\n",
 274                 rw ? "w" : "r", id, (unsigned long) e );
 275 #endif
 276
 277         /* marks the entry as committed, so it will get added to the cache
 278          * when the lock is released */
 279         cache_entry_commit( e );
 280
 281         return( e );
 282 }