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                                         dn->bv_val, LDAP_SCOPE_DEFAULT )
 102                                 : NULL;
 103                         bdb_entry_return( be, matched );
 104                         matched = NULL;
 105
 106                 } else {
 107                         refs = referral_rewrite( default_referral,
 108                                 NULL, dn->bv_val, LDAP_SCOPE_DEFAULT );
 109                 }
 110
 111                 send_ldap_result( conn, op, LDAP_REFERRAL,
 112                         matched_dn, NULL, refs, NULL );
 113
 114                 ber_bvecfree( refs );
 115                 free( matched_dn );
 116
 117                 rc = -1;
 118                 goto done;
 119         }
 120
 121         pdn = dn_parent( be, ndn->bv_val );
 122
 123         if( pdn != NULL && *pdn != '\0' ) {
 124                 /* get parent */
 125                 rc = bdb_dn2entry( be, ltid, pdn, &p, NULL, 0 );
 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                 /* no parent, must be root to delete */
 166                 if( ! be_isroot( be, &op->o_ndn ) ) {
 167                         if ( be_issuffix( be, "" ) || be_isupdate( be, &op->o_ndn ) ) {
 168                                 p = (Entry *)&slap_entry_root;
 169
 170                                 /* check parent for "children" acl */
 171                                 rc = access_allowed( be, conn, op, p,
 172                                         children, NULL, ACL_WRITE );
 173                                 p = NULL;
 174
 175                                 if ( !rc  ) {
 176                                         Debug( LDAP_DEBUG_TRACE,
 177                                                 "<=- bdb_delete: no access "
 178                                                 "to parent\n", 0, 0, 0 );
 179                                         rc = LDAP_INSUFFICIENT_ACCESS;
 180                                         goto return_results;
 181                                 }
 182
 183                         } else {
 184                                 Debug( LDAP_DEBUG_TRACE,
 185                                         "<=- bdb_delete: no parent "
 186                                         "and not root\n", 0, 0, 0);
 187                                 rc = LDAP_INSUFFICIENT_ACCESS;
 188                                 goto return_results;
 189                         }
 190                 }
 191         }
 192
 193         if ( !manageDSAit && is_entry_referral( e ) ) {
 194                 /* parent is a referral, don't allow add */
 195                 /* parent is an alias, don't allow add */
 196                 struct berval **refs = get_entry_referrals( be,
 197                         conn, op, e, dn->bv_val, LDAP_SCOPE_DEFAULT );
 198
 199                 Debug( LDAP_DEBUG_TRACE,
 200                         "bdb_delete: entry is referral\n",
 201                         0, 0, 0 );
 202
 203                 send_ldap_result( conn, op, LDAP_REFERRAL,
 204                         e->e_dn, NULL, refs, NULL );
 205
 206                 ber_bvecfree( refs );
 207
 208                 rc = 1;
 209                 goto done;
 210         }
 211
 212         rc = bdb_dn2id_children( be, ltid, e->e_ndn );
 213         if( rc != DB_NOTFOUND ) {
 214                 switch( rc ) {
 215                 case DB_LOCK_DEADLOCK:
 216                 case DB_LOCK_NOTGRANTED:
 217                         goto retry;
 218                 case 0:
 219                         Debug(LDAP_DEBUG_ARGS,
 220                                 "<=- bdb_delete: non-leaf %s\n",
 221                                 dn, 0, 0);
 222                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 223                         text = "subtree delete not supported";
 224                         break;
 225                 default:
 226                         Debug(LDAP_DEBUG_ARGS,
 227                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 228                                 db_strerror(rc), rc, 0 );
 229                         rc = LDAP_OTHER;
 230                         text = "internal error";
 231                 }
 232                 goto return_results;
 233         }
 234
 235         /* delete from dn2id */
 236         rc = bdb_dn2id_delete( be, ltid, pdn, e );
 237         if ( rc != 0 ) {
 238                 switch( rc ) {
 239                 case DB_LOCK_DEADLOCK:
 240                 case DB_LOCK_NOTGRANTED:
 241                         goto retry;
 242                 default:
 243                         rc = LDAP_OTHER;
 244                 }
 245                 Debug(LDAP_DEBUG_ARGS,
 246                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 247                         db_strerror(rc), rc, 0 );
 248                 text = "DN index delete failed";
 249                 goto return_results;
 250         }
 251
 252         /* delete indices for old attributes */
 253         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 254         if ( rc != LDAP_SUCCESS ) {
 255                 switch( rc ) {
 256                 case DB_LOCK_DEADLOCK:
 257                 case DB_LOCK_NOTGRANTED:
 258                         goto retry;
 259                 default:
 260                         rc = LDAP_OTHER;
 261                 }
 262                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 263                         0, 0, 0 );
 264                 text = "entry index delete failed";
 265                 goto return_results;
 266         }
 267
 268         /* delete from id2entry */
 269         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 270         if ( rc != 0 ) {
 271                 switch( rc ) {
 272                 case DB_LOCK_DEADLOCK:
 273                 case DB_LOCK_NOTGRANTED:
 274                         goto retry;
 275                 default:
 276                         rc = LDAP_OTHER;
 277                 }
 278                 Debug(LDAP_DEBUG_ARGS,
 279                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 280                         db_strerror(rc), rc, 0 );
 281                 text = "entry delete failed";
 282                 goto return_results;
 283         }
 284
 285
 286 #if 0   /* Do we want to reclaim deleted IDs? */
 287         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 288         if ( e->e_id == bdb->bi_lastid ) {
 289                 bdb_last_id( be, ltid );
 290         }
 291         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 292 #endif
 293
 294         if( bdb->bi_txn ) {
 295                 rc = txn_commit( ltid, 0 );
 296         }
 297         ltid = NULL;
 298         op->o_private = NULL;
 299
 300         if( rc != 0 ) {
 301                 Debug( LDAP_DEBUG_TRACE,
 302                         "bdb_delete: txn_commit failed: %s (%d)\n",
 303                         db_strerror(rc), rc, 0 );
 304                 rc = LDAP_OTHER;
 305                 text = "commit failed";
 306
 307         } else {
 308                 Debug( LDAP_DEBUG_TRACE,
 309                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 310                         e->e_id, e->e_dn, 0 );
 311                 rc = LDAP_SUCCESS;
 312                 text = NULL;
 313         }
 314
 315 return_results:
 316         send_ldap_result( conn, op, LDAP_SUCCESS,
 317                 NULL, text, NULL, NULL );
 318
 319         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 320                 ldap_pvt_thread_yield();
 321                 TXN_CHECKPOINT( bdb->bi_dbenv,
 322                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 323         }
 324
 325 done:
 326         /* free entry */
 327         if( e != NULL ) {
 328                 bdb_entry_return( be, e );
 329         }
 330
 331         if( ltid != NULL ) {
 332                 txn_abort( ltid );
 333                 op->o_private = NULL;
 334         }
 335
 336         return rc;
 337 }