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 = NULL;
  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                                 : NULL;
  97                         bdb_entry_return( be, matched );
  98                         matched = NULL;
  99
 100                 } else {
 101                         refs = default_referral;
 102                 }
 103
 104                 send_ldap_result( conn, op, LDAP_REFERRAL,
 105                         matched_dn, NULL, refs, NULL );
 106
 107                 if ( matched != NULL ) {
 108                         ber_bvecfree( refs );
 109                         free( matched_dn );
 110                 }
 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                         Debug( LDAP_DEBUG_TRACE,
 167                                 "<=- bdb_delete: no parent and not root\n",
 168                                 0, 0, 0);
 169                         rc = LDAP_INSUFFICIENT_ACCESS;
 170                         goto return_results;
 171                 }
 172         }
 173
 174         if ( !manageDSAit && is_entry_referral( e ) ) {
 175                 /* parent is a referral, don't allow add */
 176                 /* parent is an alias, don't allow add */
 177                 struct berval **refs = get_entry_referrals( be,
 178                         conn, op, e );
 179
 180                 Debug( LDAP_DEBUG_TRACE,
 181                         "bdb_delete: entry is referral\n",
 182                         0, 0, 0 );
 183
 184                 send_ldap_result( conn, op, LDAP_REFERRAL,
 185                         e->e_dn, NULL, refs, NULL );
 186
 187                 ber_bvecfree( refs );
 188
 189                 rc = 1;
 190                 goto done;
 191         }
 192
 193         rc = bdb_dn2id_children( be, ltid, e->e_ndn );
 194         if( rc != DB_NOTFOUND ) {
 195                 switch( rc ) {
 196                 case DB_LOCK_DEADLOCK:
 197                 case DB_LOCK_NOTGRANTED:
 198                         goto retry;
 199                 case 0:
 200                         Debug(LDAP_DEBUG_ARGS,
 201                                 "<=- bdb_delete: non-leaf %s\n",
 202                                 dn, 0, 0);
 203                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 204                         text = "subtree delete not supported";
 205                         break;
 206                 default:
 207                         Debug(LDAP_DEBUG_ARGS,
 208                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 209                                 db_strerror(rc), rc, 0 );
 210                         rc = LDAP_OTHER;
 211                         text = "internal error";
 212                 }
 213                 goto return_results;
 214         }
 215
 216         /* delete from dn2id */
 217         rc = bdb_dn2id_delete( be, ltid, e->e_ndn, e->e_id );
 218         if ( rc != 0 ) {
 219                 switch( rc ) {
 220                 case DB_LOCK_DEADLOCK:
 221                 case DB_LOCK_NOTGRANTED:
 222                         goto retry;
 223                 default:
 224                         rc = LDAP_OTHER;
 225                 }
 226                 Debug(LDAP_DEBUG_ARGS,
 227                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 228                         db_strerror(rc), rc, 0 );
 229                 text = "DN index delete failed";
 230                 goto return_results;
 231         }
 232
 233         /* delete from id2entry */
 234         if ( bdb_id2entry_delete( be, ltid, e->e_id ) != 0 ) {
 235                 switch( rc ) {
 236                 case DB_LOCK_DEADLOCK:
 237                 case DB_LOCK_NOTGRANTED:
 238                         goto retry;
 239                 default:
 240                         rc = LDAP_OTHER;
 241                 }
 242                 Debug(LDAP_DEBUG_ARGS,
 243                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 244                         db_strerror(rc), rc, 0 );
 245                 text = "entry delete failed";
 246                 goto return_results;
 247         }
 248
 249         rc = txn_commit( ltid, 0 );
 250         ltid = NULL;
 251         op->o_private = NULL;
 252
 253         if( rc == 0 ) {
 254                 Debug( LDAP_DEBUG_TRACE,
 255                         "bdb_add: txn_commit failed: %s (%d)\n",
 256                         db_strerror(rc), rc, 0 );
 257                 rc = LDAP_OTHER;
 258                 text = "commit failed";
 259
 260         } else {
 261                 Debug( LDAP_DEBUG_TRACE,
 262                         "bdb_add: added id=%08x dn=\"%s\"\n",
 263                         e->e_id, e->e_dn, 0 );
 264                 rc = LDAP_SUCCESS;
 265                 text = NULL;
 266         }
 267
 268 return_results:
 269         send_ldap_result( conn, op, LDAP_SUCCESS,
 270                 NULL, text, NULL, NULL );
 271
 272         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 273                 ldap_pvt_thread_yield();
 274                 txn_checkpoint( bdb->bi_dbenv,
 275                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 276         }
 277
 278 done:
 279         /* free entry */
 280         if( e != NULL ) {
 281                 bdb_entry_return( be, e );
 282         }
 283
 284         if( ltid != NULL ) {
 285                 txn_abort( ltid );
 286                 op->o_private = NULL;
 287         }
 288
 289         return rc;
 290 }