git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/delete.c

   1 /* delete.c - bdb backend delete routine */
   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 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 int
  17 bdb_delete(
  18         BackendDB       *be,
  19         Connection      *conn,
  20         Operation       *op,
  21         const char      *dn,
  22         const char      *ndn
  23 )
  24 {
  25         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  26         Entry   *matched;
  27         char    *pdn = NULL;
  28         Entry   *e, *p = NULL;
  29         int     rc;
  30         const char *text;
  31         int             manageDSAit = get_manageDSAit( op );
  32         AttributeDescription *children = slap_schema.si_ad_children;
  33         DB_TXN          *ltid = NULL;
  34         struct bdb_op_info opinfo;
  35
  36         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n", dn, 0, 0 );
  37
  38         if( 0 ) {
  39 retry:  /* transaction retry */
  40                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n", 0, 0, 0 );
  41                 rc = txn_abort( ltid );
  42                 ltid = NULL;
  43                 op->o_private = NULL;
  44                 if( rc != 0 ) {
  45                         rc = LDAP_OTHER;
  46                         text = "internal error";
  47                         goto return_results;
  48                 }
  49         }
  50
  51         if( bdb->bi_txn ) {
  52                 /* begin transaction */
  53                 rc = txn_begin( bdb->bi_dbenv, NULL, &ltid, 0 );
  54                 text = NULL;
  55                 if( rc != 0 ) {
  56                         Debug( LDAP_DEBUG_TRACE,
  57                                 "bdb_delete: txn_begin failed: %s (%d)\n",
  58                                 db_strerror(rc), rc, 0 );
  59                         rc = LDAP_OTHER;
  60                         text = "internal error";
  61                         goto return_results;
  62                 }
  63         }
  64
  65         opinfo.boi_bdb = be;
  66         opinfo.boi_txn = ltid;
  67         opinfo.boi_err = 0;
  68         op->o_private = &opinfo;
  69
  70         /* get entry for read/modify/write */
  71         rc = bdb_dn2entry( be, ltid, ndn, &e, &matched, DB_RMW );
  72
  73         switch( rc ) {
  74         case 0:
  75         case DB_NOTFOUND:
  76                 break;
  77         case DB_LOCK_DEADLOCK:
  78         case DB_LOCK_NOTGRANTED:
  79                 goto retry;
  80         default:
  81                 rc = LDAP_OTHER;
  82                 text = "internal error";
  83                 goto return_results;
  84         }
  85
  86         if ( e == NULL ) {
  87                 char *matched_dn = NULL;
  88                 struct berval **refs;
  89
  90                 Debug( LDAP_DEBUG_ARGS,
  91                         "<=- bdb_delete: no such object %s\n",
  92                         dn, 0, 0);
  93
  94                 if ( matched != NULL ) {
  95                         matched_dn = ch_strdup( matched->e_dn );
  96                         refs = is_entry_referral( matched )
  97                                 ? get_entry_referrals( be, conn, op, matched,
  98                                         dn, LDAP_SCOPE_DEFAULT )
  99                                 : NULL;
 100                         bdb_entry_return( be, matched );
 101                         matched = NULL;
 102
 103                 } else {
 104                         refs = referral_rewrite( default_referral,
 105                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 106                 }
 107
 108                 send_ldap_result( conn, op, LDAP_REFERRAL,
 109                         matched_dn, NULL, refs, NULL );
 110
 111                 ber_bvecfree( refs );
 112                 free( matched_dn );
 113
 114                 rc = -1;
 115                 goto done;
 116         }
 117
 118         pdn = dn_parent( be, ndn );
 119
 120         if( pdn != NULL && *pdn != '\0' ) {
 121                 /* get parent */
 122                 rc = bdb_dn2entry( be, ltid, pdn, &p, NULL, 0 );
 123
 124                 ch_free( pdn );
 125
 126                 switch( rc ) {
 127                 case 0:
 128                 case DB_NOTFOUND:
 129                         break;
 130                 case DB_LOCK_DEADLOCK:
 131                 case DB_LOCK_NOTGRANTED:
 132                         goto retry;
 133                 default:
 134                         rc = LDAP_OTHER;
 135                         text = "internal error";
 136                         goto return_results;
 137                 }
 138
 139                 if( p == NULL) {
 140                         Debug( LDAP_DEBUG_TRACE,
 141                                 "<=- bdb_delete: parent does not exist\n",
 142                                 0, 0, 0);
 143                         rc = LDAP_OTHER;
 144                         text = "could not locate parent of entry";
 145                         goto return_results;
 146                 }
 147
 148                 /* check parent for "children" acl */
 149                 rc = access_allowed( be, conn, op, p,
 150                         children, NULL, ACL_WRITE );
 151
 152                 bdb_entry_return( be, p );
 153                 p = NULL;
 154
 155                 if ( !rc  ) {
 156                         Debug( LDAP_DEBUG_TRACE,
 157                                 "<=- bdb_delete: no access to parent\n",
 158                                 0, 0, 0 );
 159                         rc = LDAP_INSUFFICIENT_ACCESS;
 160                         goto return_results;
 161                 }
 162
 163         } else {
 164                 ch_free( pdn );
 165
 166                 /* no parent, must be root to delete */
 167                 if( ! be_isroot( be, op->o_ndn ) ) {
 168                         if ( be_issuffix( be, "" ) || be_isupdate( be, op->o_ndn ) ) {
 169                                 p = (Entry *)&slap_entry_root;
 170
 171                                 /* check parent for "children" acl */
 172                                 rc = access_allowed( be, conn, op, p,
 173                                         children, NULL, ACL_WRITE );
 174                                 p = NULL;
 175
 176                                 if ( !rc  ) {
 177                                         Debug( LDAP_DEBUG_TRACE,
 178                                                 "<=- bdb_delete: no access "
 179                                                 "to parent\n", 0, 0, 0 );
 180                                         rc = LDAP_INSUFFICIENT_ACCESS;
 181                                         goto return_results;
 182                                 }
 183
 184                         } else {
 185                                 Debug( LDAP_DEBUG_TRACE,
 186                                         "<=- bdb_delete: no parent "
 187                                         "and not root\n", 0, 0, 0);
 188                                 rc = LDAP_INSUFFICIENT_ACCESS;
 189                                 goto return_results;
 190                         }
 191                 }
 192         }
 193
 194         if ( !manageDSAit && is_entry_referral( e ) ) {
 195                 /* parent is a referral, don't allow add */
 196                 /* parent is an alias, don't allow add */
 197                 struct berval **refs = get_entry_referrals( be,
 198                         conn, op, e, dn, LDAP_SCOPE_DEFAULT );
 199
 200                 Debug( LDAP_DEBUG_TRACE,
 201                         "bdb_delete: entry is referral\n",
 202                         0, 0, 0 );
 203
 204                 send_ldap_result( conn, op, LDAP_REFERRAL,
 205                         e->e_dn, NULL, refs, NULL );
 206
 207                 ber_bvecfree( refs );
 208
 209                 rc = 1;
 210                 goto done;
 211         }
 212
 213         rc = bdb_dn2id_children( be, ltid, e->e_ndn );
 214         if( rc != DB_NOTFOUND ) {
 215                 switch( rc ) {
 216                 case DB_LOCK_DEADLOCK:
 217                 case DB_LOCK_NOTGRANTED:
 218                         goto retry;
 219                 case 0:
 220                         Debug(LDAP_DEBUG_ARGS,
 221                                 "<=- bdb_delete: non-leaf %s\n",
 222                                 dn, 0, 0);
 223                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 224                         text = "subtree delete not supported";
 225                         break;
 226                 default:
 227                         Debug(LDAP_DEBUG_ARGS,
 228                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 229                                 db_strerror(rc), rc, 0 );
 230                         rc = LDAP_OTHER;
 231                         text = "internal error";
 232                 }
 233                 goto return_results;
 234         }
 235
 236         /* delete from dn2id */
 237         rc = bdb_dn2id_delete( be, ltid, e->e_ndn, e->e_id );
 238         if ( rc != 0 ) {
 239                 switch( rc ) {
 240                 case DB_LOCK_DEADLOCK:
 241                 case DB_LOCK_NOTGRANTED:
 242                         goto retry;
 243                 default:
 244                         rc = LDAP_OTHER;
 245                 }
 246                 Debug(LDAP_DEBUG_ARGS,
 247                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 248                         db_strerror(rc), rc, 0 );
 249                 text = "DN index delete failed";
 250                 goto return_results;
 251         }
 252
 253         /* delete indices for old attributes */
 254         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 255         if ( rc != LDAP_SUCCESS ) {
 256                 switch( rc ) {
 257                 case DB_LOCK_DEADLOCK:
 258                 case DB_LOCK_NOTGRANTED:
 259                         goto retry;
 260                 default:
 261                         rc = LDAP_OTHER;
 262                 }
 263                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 264                         0, 0, 0 );
 265                 text = "entry index delete failed";
 266                 goto return_results;
 267         }
 268
 269         /* delete from id2entry */
 270         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 271         if ( rc != 0 ) {
 272                 switch( rc ) {
 273                 case DB_LOCK_DEADLOCK:
 274                 case DB_LOCK_NOTGRANTED:
 275                         goto retry;
 276                 default:
 277                         rc = LDAP_OTHER;
 278                 }
 279                 Debug(LDAP_DEBUG_ARGS,
 280                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 281                         db_strerror(rc), rc, 0 );
 282                 text = "entry delete failed";
 283                 goto return_results;
 284         }
 285
 286         if( bdb->bi_txn ) {
 287                 rc = txn_commit( ltid, 0 );
 288         }
 289         ltid = NULL;
 290         op->o_private = NULL;
 291
 292         if( rc != 0 ) {
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "bdb_delete: txn_commit failed: %s (%d)\n",
 295                         db_strerror(rc), rc, 0 );
 296                 rc = LDAP_OTHER;
 297                 text = "commit failed";
 298
 299         } else {
 300                 Debug( LDAP_DEBUG_TRACE,
 301                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 302                         e->e_id, e->e_dn, 0 );
 303                 rc = LDAP_SUCCESS;
 304                 text = NULL;
 305         }
 306
 307 return_results:
 308         send_ldap_result( conn, op, LDAP_SUCCESS,
 309                 NULL, text, NULL, NULL );
 310
 311         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 312                 ldap_pvt_thread_yield();
 313                 txn_checkpoint( bdb->bi_dbenv,
 314                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 315         }
 316
 317 done:
 318         /* free entry */
 319         if( e != NULL ) {
 320                 bdb_entry_return( be, e );
 321         }
 322
 323         if( ltid != NULL ) {
 324                 txn_abort( ltid );
 325                 op->o_private = NULL;
 326         }
 327
 328         return rc;
 329 }