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

   1 /* delete.c - ldbm 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
  12 #include <ac/string.h>
  13 #include <ac/socket.h>
  14
  15 #include "slap.h"
  16 #include "back-ldbm.h"
  17 #include "proto-back-ldbm.h"
  18
  19 int
  20 ldbm_back_delete(
  21     Backend     *be,
  22     Connection  *conn,
  23     Operation   *op,
  24     const char  *dn,
  25     const char  *ndn
  26 )
  27 {
  28         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  29         Entry   *matched;
  30         char    *pdn = NULL;
  31         Entry   *e, *p = NULL;
  32         int     rc = -1;
  33         int             manageDSAit = get_manageDSAit( op );
  34         AttributeDescription *children = slap_schema.si_ad_children;
  35
  36         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_delete: %s\n", dn, 0, 0);
  37
  38         /* grab giant lock for writing */
  39         ldap_pvt_thread_rdwr_wlock(&li->li_giant_rwlock);
  40
  41         /* get entry with writer lock */
  42         if ( (e = dn2entry_w( be, ndn, &matched )) == NULL ) {
  43                 char *matched_dn = NULL;
  44                 struct berval **refs = NULL;
  45
  46                 Debug(LDAP_DEBUG_ARGS, "<=- ldbm_back_delete: no such object %s\n",
  47                         dn, 0, 0);
  48
  49                 if ( matched != NULL ) {
  50                         matched_dn = ch_strdup( matched->e_dn );
  51                         refs = is_entry_referral( matched )
  52                                 ? get_entry_referrals( be, conn, op, matched )
  53                                 : NULL;
  54                         cache_return_entry_r( &li->li_cache, matched );
  55                 } else {
  56                         refs = default_referral;
  57                 }
  58
  59                 ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
  60
  61                 send_ldap_result( conn, op, LDAP_REFERRAL,
  62                         matched_dn, NULL, refs, NULL );
  63
  64                 if ( matched != NULL ) {
  65                         ber_bvecfree( refs );
  66                         free( matched_dn );
  67                 }
  68
  69                 return( -1 );
  70         }
  71
  72     if ( !manageDSAit && is_entry_referral( e ) ) {
  73                 /* parent is a referral, don't allow add */
  74                 /* parent is an alias, don't allow add */
  75                 struct berval **refs = get_entry_referrals( be,
  76                         conn, op, e );
  77
  78                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
  79                     0, 0 );
  80
  81                 send_ldap_result( conn, op, LDAP_REFERRAL,
  82                     e->e_dn, NULL, refs, NULL );
  83
  84                 ber_bvecfree( refs );
  85
  86                 rc = 1;
  87                 goto return_results;
  88         }
  89
  90
  91         if ( has_children( be, e ) ) {
  92                 Debug(LDAP_DEBUG_ARGS, "<=- ldbm_back_delete: non leaf %s\n",
  93                         dn, 0, 0);
  94                 send_ldap_result( conn, op, LDAP_NOT_ALLOWED_ON_NONLEAF,
  95                         NULL, "subtree delete not supported", NULL, NULL );
  96                 goto return_results;
  97         }
  98
  99         /* delete from parent's id2children entry */
 100         if( (pdn = dn_parent( be, e->e_ndn )) != NULL && pdn[ 0 ] != '\0' ) {
 101                 if( (p = dn2entry_w( be, pdn, NULL )) == NULL) {
 102                         Debug( LDAP_DEBUG_TRACE,
 103                                 "<=- ldbm_back_delete: parent does not exist\n",
 104                                 0, 0, 0);
 105                         send_ldap_result( conn, op, LDAP_OTHER,
 106                                 NULL, "could not locate parent of entry", NULL, NULL );
 107                         goto return_results;
 108                 }
 109
 110                 /* check parent for "children" acl */
 111                 if ( ! access_allowed( be, conn, op, p,
 112                         children, NULL, ACL_WRITE ) )
 113                 {
 114                         Debug( LDAP_DEBUG_TRACE,
 115                                 "<=- ldbm_back_delete: no access to parent\n", 0,
 116                                 0, 0 );
 117                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 118                                 NULL, NULL, NULL, NULL );
 119                         goto return_results;
 120                 }
 121
 122         } else {
 123                 /* no parent, must be root to delete */
 124                 if( ! be_isroot( be, op->o_ndn ) ) {
 125                         if ( be_issuffix( be, "" )
 126                                         || be_isupdate( be, op->o_ndn ) ) {
 127                                 static const Entry rootp = { NOID, "", "", NULL, NULL };
 128                                 p = (Entry *)&rootp;
 129
 130                                 rc = access_allowed( be, conn, op, p,
 131                                                 children, NULL, ACL_WRITE );
 132                                 p = NULL;
 133
 134                                 /* check parent for "children" acl */
 135                                 if ( ! rc ) {
 136                                         Debug( LDAP_DEBUG_TRACE,
 137                                                 "<=- ldbm_back_delete: no "
 138                                                 "access to parent\n", 0, 0, 0 );
 139
 140                                         send_ldap_result( conn, op,
 141                                                 LDAP_INSUFFICIENT_ACCESS,
 142                                                 NULL, NULL, NULL, NULL );
 143                                         goto return_results;
 144                                 }
 145
 146                         } else {
 147                                 Debug( LDAP_DEBUG_TRACE,
 148                                         "<=- ldbm_back_delete: no parent & "
 149                                         "not root\n", 0, 0, 0);
 150
 151                                 send_ldap_result( conn, op,
 152                                         LDAP_INSUFFICIENT_ACCESS,
 153                                         NULL, NULL, NULL, NULL );
 154                                 goto return_results;
 155                         }
 156                 }
 157         }
 158
 159         /* delete from dn2id mapping */
 160         if ( dn2id_delete( be, e->e_ndn, e->e_id ) != 0 ) {
 161                 Debug(LDAP_DEBUG_ARGS,
 162                         "<=- ldbm_back_delete: operations error %s\n",
 163                         dn, 0, 0);
 164                 send_ldap_result( conn, op, LDAP_OTHER,
 165                         NULL, "DN index delete failed", NULL, NULL );
 166                 goto return_results;
 167         }
 168
 169         /* delete from disk and cache */
 170         if ( id2entry_delete( be, e ) != 0 ) {
 171                 Debug(LDAP_DEBUG_ARGS,
 172                         "<=- ldbm_back_delete: operations error %s\n",
 173                         dn, 0, 0);
 174                 send_ldap_result( conn, op, LDAP_OTHER,
 175                         NULL, "entry delete failed", NULL, NULL );
 176                 goto return_results;
 177         }
 178
 179         /* delete attribute indices */
 180         (void) index_entry_del( be, e, e->e_attrs );
 181
 182         send_ldap_result( conn, op, LDAP_SUCCESS,
 183                 NULL, NULL, NULL, NULL );
 184         rc = 0;
 185
 186 return_results:;
 187         if ( pdn != NULL ) free(pdn);
 188
 189         if( p != NULL ) {
 190                 /* free parent and writer lock */
 191                 cache_return_entry_w( &li->li_cache, p );
 192         }
 193
 194         /* free entry and writer lock */
 195         cache_return_entry_w( &li->li_cache, e );
 196
 197         ldap_pvt_thread_rdwr_wunlock(&li->li_giant_rwlock);
 198
 199         return rc;
 200 }