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         struct berval   *dn,
  22         struct berval   *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",
  37                 dn->bv_val, 0, 0 );
  38
  39         if( 0 ) {
  40 retry:  /* transaction retry */
  41                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n",
  42                         0, 0, 0 );
  43                 rc = txn_abort( ltid );
  44                 ltid = NULL;
  45                 op->o_private = NULL;
  46                 if( rc != 0 ) {
  47                         rc = LDAP_OTHER;
  48                         text = "internal error";
  49                         goto return_results;
  50                 }
  51         }
  52
  53         if( bdb->bi_txn ) {
  54                 /* begin transaction */
  55                 rc = txn_begin( bdb->bi_dbenv, NULL, &ltid,
  56                         bdb->bi_db_opflags );
  57                 text = NULL;
  58                 if( rc != 0 ) {
  59                         Debug( LDAP_DEBUG_TRACE,
  60                                 "bdb_delete: txn_begin failed: %s (%d)\n",
  61                                 db_strerror(rc), rc, 0 );
  62                         rc = LDAP_OTHER;
  63                         text = "internal error";
  64                         goto return_results;
  65                 }
  66         }
  67
  68         opinfo.boi_bdb = be;
  69         opinfo.boi_txn = ltid;
  70         opinfo.boi_err = 0;
  71         op->o_private = &opinfo;
  72
  73         /* get entry for read/modify/write */
  74         rc = bdb_dn2entry( be, ltid, ndn->bv_val, &e, &matched, DB_RMW );
  75
  76         switch( rc ) {
  77         case 0:
  78         case DB_NOTFOUND:
  79                 break;
  80         case DB_LOCK_DEADLOCK:
  81         case DB_LOCK_NOTGRANTED:
  82                 goto retry;
  83         default:
  84                 rc = LDAP_OTHER;
  85                 text = "internal error";
  86                 goto return_results;
  87         }
  88
  89         if ( e == NULL ) {
  90                 char *matched_dn = NULL;
  91                 struct berval **refs;
  92
  93                 Debug( LDAP_DEBUG_ARGS,
  94                         "<=- bdb_delete: no such object %s\n",
  95                         dn, 0, 0);
  96
  97                 if ( matched != NULL ) {
  98                         matched_dn = ch_strdup( matched->e_dn );
  99                         refs = is_entry_referral( matched )
 100                                 ? get_entry_referrals( be, conn, op, matched )
 101                                 : NULL;
 102                         bdb_entry_return( be, matched );
 103                         matched = NULL;
 104
 105                 } else {
 106                         refs = referral_rewrite( default_referral,
 107                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 108                 }
 109
 110                 send_ldap_result( conn, op, LDAP_REFERRAL,
 111                         matched_dn, NULL, refs, NULL );
 112
 113                 ber_bvecfree( refs );
 114                 free( matched_dn );
 115
 116                 rc = -1;
 117                 goto done;
 118         }
 119
 120         pdn = dn_parent( be, ndn->bv_val );
 121
 122         if( pdn != NULL && *pdn != '\0' ) {
 123                 /* get parent */
 124                 rc = bdb_dn2entry( be, ltid, pdn, &p, NULL, 0 );
 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                 /* 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 );
 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, pdn, e );
 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         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 269         if ( rc != 0 ) {
 270                 switch( rc ) {
 271                 case DB_LOCK_DEADLOCK:
 272                 case DB_LOCK_NOTGRANTED:
 273                         goto retry;
 274                 default:
 275                         rc = LDAP_OTHER;
 276                 }
 277                 Debug(LDAP_DEBUG_ARGS,
 278                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 279                         db_strerror(rc), rc, 0 );
 280                 text = "entry delete failed";
 281                 goto return_results;
 282         }
 283
 284
 285 #if 0   /* Do we want to reclaim deleted IDs? */
 286         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 287         if ( e->e_id == bdb->bi_lastid ) {
 288                 bdb_last_id( be, ltid );
 289         }
 290         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 291 #endif
 292
 293         if( bdb->bi_txn ) {
 294                 rc = txn_commit( ltid, 0 );
 295         }
 296         ltid = NULL;
 297         op->o_private = NULL;
 298
 299         if( rc != 0 ) {
 300                 Debug( LDAP_DEBUG_TRACE,
 301                         "bdb_delete: txn_commit failed: %s (%d)\n",
 302                         db_strerror(rc), rc, 0 );
 303                 rc = LDAP_OTHER;
 304                 text = "commit failed";
 305
 306         } else {
 307                 Debug( LDAP_DEBUG_TRACE,
 308                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 309                         e->e_id, e->e_dn, 0 );
 310                 rc = LDAP_SUCCESS;
 311                 text = NULL;
 312         }
 313
 314 return_results:
 315         send_ldap_result( conn, op, LDAP_SUCCESS,
 316                 NULL, text, NULL, NULL );
 317
 318         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 319                 ldap_pvt_thread_yield();
 320                 TXN_CHECKPOINT( bdb->bi_dbenv,
 321                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 322         }
 323
 324 done:
 325         /* free entry */
 326         if( e != NULL ) {
 327                 bdb_entry_return( be, e );
 328         }
 329
 330         if( ltid != NULL ) {
 331                 txn_abort( ltid );
 332                 op->o_private = NULL;
 333         }
 334
 335         return rc;
 336 }