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,
  54                         bdb->bi_db_opflags );
  55                 text = NULL;
  56                 if( rc != 0 ) {
  57                         Debug( LDAP_DEBUG_TRACE,
  58                                 "bdb_delete: txn_begin failed: %s (%d)\n",
  59                                 db_strerror(rc), rc, 0 );
  60                         rc = LDAP_OTHER;
  61                         text = "internal error";
  62                         goto return_results;
  63                 }
  64         }
  65
  66         opinfo.boi_bdb = be;
  67         opinfo.boi_txn = ltid;
  68         opinfo.boi_err = 0;
  69         op->o_private = &opinfo;
  70
  71         /* get entry for read/modify/write */
  72         rc = bdb_dn2entry( be, ltid, ndn, &e, &matched, DB_RMW );
  73
  74         switch( rc ) {
  75         case 0:
  76         case DB_NOTFOUND:
  77                 break;
  78         case DB_LOCK_DEADLOCK:
  79         case DB_LOCK_NOTGRANTED:
  80                 goto retry;
  81         default:
  82                 rc = LDAP_OTHER;
  83                 text = "internal error";
  84                 goto return_results;
  85         }
  86
  87         if ( e == NULL ) {
  88                 char *matched_dn = NULL;
  89                 struct berval **refs;
  90
  91                 Debug( LDAP_DEBUG_ARGS,
  92                         "<=- bdb_delete: no such object %s\n",
  93                         dn, 0, 0);
  94
  95                 if ( matched != NULL ) {
  96                         matched_dn = ch_strdup( matched->e_dn );
  97                         refs = is_entry_referral( matched )
  98                                 ? get_entry_referrals( be, conn, op, matched,
  99                                         dn, LDAP_SCOPE_DEFAULT )
 100                                 : NULL;
 101                         bdb_entry_return( be, matched );
 102                         matched = NULL;
 103
 104                 } else {
 105                         refs = referral_rewrite( default_referral,
 106                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 107                 }
 108
 109                 send_ldap_result( conn, op, LDAP_REFERRAL,
 110                         matched_dn, NULL, refs, NULL );
 111
 112                 ber_bvecfree( refs );
 113                 free( matched_dn );
 114
 115                 rc = -1;
 116                 goto done;
 117         }
 118
 119         pdn = dn_parent( be, ndn );
 120
 121         if( pdn != NULL && *pdn != '\0' ) {
 122                 /* get parent */
 123                 rc = bdb_dn2entry( be, ltid, pdn, &p, NULL, 0 );
 124
 125                 ch_free( pdn );
 126
 127                 switch( rc ) {
 128                 case 0:
 129                 case DB_NOTFOUND:
 130                         break;
 131                 case DB_LOCK_DEADLOCK:
 132                 case DB_LOCK_NOTGRANTED:
 133                         goto retry;
 134                 default:
 135                         rc = LDAP_OTHER;
 136                         text = "internal error";
 137                         goto return_results;
 138                 }
 139
 140                 if( p == NULL) {
 141                         Debug( LDAP_DEBUG_TRACE,
 142                                 "<=- bdb_delete: parent does not exist\n",
 143                                 0, 0, 0);
 144                         rc = LDAP_OTHER;
 145                         text = "could not locate parent of entry";
 146                         goto return_results;
 147                 }
 148
 149                 /* check parent for "children" acl */
 150                 rc = access_allowed( be, conn, op, p,
 151                         children, NULL, ACL_WRITE );
 152
 153                 bdb_entry_return( be, p );
 154                 p = NULL;
 155
 156                 if ( !rc  ) {
 157                         Debug( LDAP_DEBUG_TRACE,
 158                                 "<=- bdb_delete: no access to parent\n",
 159                                 0, 0, 0 );
 160                         rc = LDAP_INSUFFICIENT_ACCESS;
 161                         goto return_results;
 162                 }
 163
 164         } else {
 165                 ch_free( pdn );
 166
 167                 /* no parent, must be root to delete */
 168                 if( ! be_isroot( be, op->o_ndn ) ) {
 169                         if ( be_issuffix( be, "" ) || be_isupdate( be, op->o_ndn ) ) {
 170                                 p = (Entry *)&slap_entry_root;
 171
 172                                 /* check parent for "children" acl */
 173                                 rc = access_allowed( be, conn, op, p,
 174                                         children, NULL, ACL_WRITE );
 175                                 p = NULL;
 176
 177                                 if ( !rc  ) {
 178                                         Debug( LDAP_DEBUG_TRACE,
 179                                                 "<=- bdb_delete: no access "
 180                                                 "to parent\n", 0, 0, 0 );
 181                                         rc = LDAP_INSUFFICIENT_ACCESS;
 182                                         goto return_results;
 183                                 }
 184
 185                         } else {
 186                                 Debug( LDAP_DEBUG_TRACE,
 187                                         "<=- bdb_delete: no parent "
 188                                         "and not root\n", 0, 0, 0);
 189                                 rc = LDAP_INSUFFICIENT_ACCESS;
 190                                 goto return_results;
 191                         }
 192                 }
 193         }
 194
 195         if ( !manageDSAit && is_entry_referral( e ) ) {
 196                 /* parent is a referral, don't allow add */
 197                 /* parent is an alias, don't allow add */
 198                 struct berval **refs = get_entry_referrals( be,
 199                         conn, op, e, dn, LDAP_SCOPE_DEFAULT );
 200
 201                 Debug( LDAP_DEBUG_TRACE,
 202                         "bdb_delete: entry is referral\n",
 203                         0, 0, 0 );
 204
 205                 send_ldap_result( conn, op, LDAP_REFERRAL,
 206                         e->e_dn, NULL, refs, NULL );
 207
 208                 ber_bvecfree( refs );
 209
 210                 rc = 1;
 211                 goto done;
 212         }
 213
 214         rc = bdb_dn2id_children( be, ltid, e->e_ndn );
 215         if( rc != DB_NOTFOUND ) {
 216                 switch( rc ) {
 217                 case DB_LOCK_DEADLOCK:
 218                 case DB_LOCK_NOTGRANTED:
 219                         goto retry;
 220                 case 0:
 221                         Debug(LDAP_DEBUG_ARGS,
 222                                 "<=- bdb_delete: non-leaf %s\n",
 223                                 dn, 0, 0);
 224                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 225                         text = "subtree delete not supported";
 226                         break;
 227                 default:
 228                         Debug(LDAP_DEBUG_ARGS,
 229                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 230                                 db_strerror(rc), rc, 0 );
 231                         rc = LDAP_OTHER;
 232                         text = "internal error";
 233                 }
 234                 goto return_results;
 235         }
 236
 237         /* delete from dn2id */
 238         rc = bdb_dn2id_delete( be, ltid, e->e_ndn, e->e_id );
 239         if ( rc != 0 ) {
 240                 switch( rc ) {
 241                 case DB_LOCK_DEADLOCK:
 242                 case DB_LOCK_NOTGRANTED:
 243                         goto retry;
 244                 default:
 245                         rc = LDAP_OTHER;
 246                 }
 247                 Debug(LDAP_DEBUG_ARGS,
 248                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 249                         db_strerror(rc), rc, 0 );
 250                 text = "DN index delete failed";
 251                 goto return_results;
 252         }
 253
 254         /* delete indices for old attributes */
 255         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 256         if ( rc != LDAP_SUCCESS ) {
 257                 switch( rc ) {
 258                 case DB_LOCK_DEADLOCK:
 259                 case DB_LOCK_NOTGRANTED:
 260                         goto retry;
 261                 default:
 262                         rc = LDAP_OTHER;
 263                 }
 264                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 265                         0, 0, 0 );
 266                 text = "entry index delete failed";
 267                 goto return_results;
 268         }
 269
 270         /* delete from id2entry */
 271         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 272         if ( rc != 0 ) {
 273                 switch( rc ) {
 274                 case DB_LOCK_DEADLOCK:
 275                 case DB_LOCK_NOTGRANTED:
 276                         goto retry;
 277                 default:
 278                         rc = LDAP_OTHER;
 279                 }
 280                 Debug(LDAP_DEBUG_ARGS,
 281                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 282                         db_strerror(rc), rc, 0 );
 283                 text = "entry delete failed";
 284                 goto return_results;
 285         }
 286
 287         if( bdb->bi_txn ) {
 288                 rc = txn_commit( ltid, 0 );
 289         }
 290         ltid = NULL;
 291         op->o_private = NULL;
 292
 293         if( rc != 0 ) {
 294                 Debug( LDAP_DEBUG_TRACE,
 295                         "bdb_delete: txn_commit failed: %s (%d)\n",
 296                         db_strerror(rc), rc, 0 );
 297                 rc = LDAP_OTHER;
 298                 text = "commit failed";
 299
 300         } else {
 301                 Debug( LDAP_DEBUG_TRACE,
 302                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 303                         e->e_id, e->e_dn, 0 );
 304                 rc = LDAP_SUCCESS;
 305                 text = NULL;
 306         }
 307
 308 return_results:
 309         send_ldap_result( conn, op, LDAP_SUCCESS,
 310                 NULL, text, NULL, NULL );
 311
 312         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 313                 ldap_pvt_thread_yield();
 314                 txn_checkpoint( bdb->bi_dbenv,
 315                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 316         }
 317
 318 done:
 319         /* free entry */
 320         if( e != NULL ) {
 321                 bdb_entry_return( be, e );
 322         }
 323
 324         if( ltid != NULL ) {
 325                 txn_abort( ltid );
 326                 op->o_private = NULL;
 327         }
 328
 329         return rc;
 330 }