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

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 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, &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                 BVarray refs;
  92
  93                 Debug( LDAP_DEBUG_ARGS,
  94                         "<=- bdb_delete: no such object %s\n",
  95                         dn->bv_val, 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                 bvarray_free( 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                 struct berval pbv;
 124
 125                 pbv.bv_len = ndn->bv_len - (pdn - ndn->bv_val);
 126                 pbv.bv_val = pdn;
 127                 /* get parent */
 128                 rc = bdb_dn2entry( be, ltid, &pbv, &p, NULL, 0 );
 129
 130                 switch( rc ) {
 131                 case 0:
 132                 case DB_NOTFOUND:
 133                         break;
 134                 case DB_LOCK_DEADLOCK:
 135                 case DB_LOCK_NOTGRANTED:
 136                         goto retry;
 137                 default:
 138                         rc = LDAP_OTHER;
 139                         text = "internal error";
 140                         goto return_results;
 141                 }
 142
 143                 if( p == NULL) {
 144                         Debug( LDAP_DEBUG_TRACE,
 145                                 "<=- bdb_delete: parent does not exist\n",
 146                                 0, 0, 0);
 147                         rc = LDAP_OTHER;
 148                         text = "could not locate parent of entry";
 149                         goto return_results;
 150                 }
 151
 152                 /* check parent for "children" acl */
 153                 rc = access_allowed( be, conn, op, p,
 154                         children, NULL, ACL_WRITE );
 155
 156                 bdb_entry_return( be, p );
 157                 p = NULL;
 158
 159                 if ( !rc  ) {
 160                         Debug( LDAP_DEBUG_TRACE,
 161                                 "<=- bdb_delete: no access to parent\n",
 162                                 0, 0, 0 );
 163                         rc = LDAP_INSUFFICIENT_ACCESS;
 164                         goto return_results;
 165                 }
 166
 167         } else {
 168                 /* no parent, must be root to delete */
 169                 if( ! be_isroot( be, &op->o_ndn ) ) {
 170                         if ( be_issuffix( be, "" ) || be_isupdate( be, &op->o_ndn ) ) {
 171                                 p = (Entry *)&slap_entry_root;
 172
 173                                 /* check parent for "children" acl */
 174                                 rc = access_allowed( be, conn, op, p,
 175                                         children, NULL, ACL_WRITE );
 176                                 p = NULL;
 177
 178                                 if ( !rc  ) {
 179                                         Debug( LDAP_DEBUG_TRACE,
 180                                                 "<=- bdb_delete: no access "
 181                                                 "to parent\n", 0, 0, 0 );
 182                                         rc = LDAP_INSUFFICIENT_ACCESS;
 183                                         goto return_results;
 184                                 }
 185
 186                         } else {
 187                                 Debug( LDAP_DEBUG_TRACE,
 188                                         "<=- bdb_delete: no parent "
 189                                         "and not root\n", 0, 0, 0);
 190                                 rc = LDAP_INSUFFICIENT_ACCESS;
 191                                 goto return_results;
 192                         }
 193                 }
 194         }
 195
 196         if ( !manageDSAit && is_entry_referral( e ) ) {
 197                 /* parent is a referral, don't allow add */
 198                 /* parent is an alias, don't allow add */
 199                 BVarray refs = get_entry_referrals( be,
 200                         conn, op, e );
 201
 202                 Debug( LDAP_DEBUG_TRACE,
 203                         "bdb_delete: entry is referral\n",
 204                         0, 0, 0 );
 205
 206                 send_ldap_result( conn, op, LDAP_REFERRAL,
 207                         e->e_dn, NULL, refs, NULL );
 208
 209                 bvarray_free( refs );
 210
 211                 rc = 1;
 212                 goto done;
 213         }
 214
 215         rc = bdb_dn2id_children( be, ltid, &e->e_nname );
 216         if( rc != DB_NOTFOUND ) {
 217                 switch( rc ) {
 218                 case DB_LOCK_DEADLOCK:
 219                 case DB_LOCK_NOTGRANTED:
 220                         goto retry;
 221                 case 0:
 222                         Debug(LDAP_DEBUG_ARGS,
 223                                 "<=- bdb_delete: non-leaf %s\n",
 224                                 dn->bv_val, 0, 0);
 225                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 226                         text = "subtree delete not supported";
 227                         break;
 228                 default:
 229                         Debug(LDAP_DEBUG_ARGS,
 230                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 231                                 db_strerror(rc), rc, 0 );
 232                         rc = LDAP_OTHER;
 233                         text = "internal error";
 234                 }
 235                 goto return_results;
 236         }
 237
 238         /* delete from dn2id */
 239         rc = bdb_dn2id_delete( be, ltid, pdn, e );
 240         if ( rc != 0 ) {
 241                 switch( rc ) {
 242                 case DB_LOCK_DEADLOCK:
 243                 case DB_LOCK_NOTGRANTED:
 244                         goto retry;
 245                 default:
 246                         rc = LDAP_OTHER;
 247                 }
 248                 Debug(LDAP_DEBUG_ARGS,
 249                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 250                         db_strerror(rc), rc, 0 );
 251                 text = "DN index delete failed";
 252                 goto return_results;
 253         }
 254
 255         /* delete indices for old attributes */
 256         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 257         if ( rc != LDAP_SUCCESS ) {
 258                 switch( rc ) {
 259                 case DB_LOCK_DEADLOCK:
 260                 case DB_LOCK_NOTGRANTED:
 261                         goto retry;
 262                 default:
 263                         rc = LDAP_OTHER;
 264                 }
 265                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 266                         0, 0, 0 );
 267                 text = "entry index delete failed";
 268                 goto return_results;
 269         }
 270
 271         /* delete from id2entry */
 272         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 273         if ( rc != 0 ) {
 274                 switch( rc ) {
 275                 case DB_LOCK_DEADLOCK:
 276                 case DB_LOCK_NOTGRANTED:
 277                         goto retry;
 278                 default:
 279                         rc = LDAP_OTHER;
 280                 }
 281                 Debug(LDAP_DEBUG_ARGS,
 282                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 283                         db_strerror(rc), rc, 0 );
 284                 text = "entry delete failed";
 285                 goto return_results;
 286         }
 287
 288
 289 #if 0   /* Do we want to reclaim deleted IDs? */
 290         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 291         if ( e->e_id == bdb->bi_lastid ) {
 292                 bdb_last_id( be, ltid );
 293         }
 294         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 295 #endif
 296
 297         if( bdb->bi_txn ) {
 298                 rc = txn_commit( ltid, 0 );
 299         }
 300         ltid = NULL;
 301         op->o_private = NULL;
 302
 303         if( rc != 0 ) {
 304                 Debug( LDAP_DEBUG_TRACE,
 305                         "bdb_delete: txn_commit failed: %s (%d)\n",
 306                         db_strerror(rc), rc, 0 );
 307                 rc = LDAP_OTHER;
 308                 text = "commit failed";
 309
 310         } else {
 311                 Debug( LDAP_DEBUG_TRACE,
 312                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 313                         e->e_id, e->e_dn, 0 );
 314                 rc = LDAP_SUCCESS;
 315                 text = NULL;
 316         }
 317
 318 return_results:
 319         send_ldap_result( conn, op, LDAP_SUCCESS,
 320                 NULL, text, NULL, NULL );
 321
 322         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 323                 ldap_pvt_thread_yield();
 324                 TXN_CHECKPOINT( bdb->bi_dbenv,
 325                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 326         }
 327
 328 done:
 329         /* free entry */
 330         if( e != NULL ) {
 331                 bdb_entry_return( be, e );
 332         }
 333
 334         if( ltid != NULL ) {
 335                 txn_abort( ltid );
 336                 op->o_private = NULL;
 337         }
 338
 339         return rc;
 340 }