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