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

   1 /* delete.c - ldbm backend delete routine */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6
   7 #include <ac/string.h>
   8 #include <ac/socket.h>
   9
  10 #include "slap.h"
  11 #include "back-ldbm.h"
  12 #include "proto-back-ldbm.h"
  13
  14 int
  15 ldbm_back_delete(
  16     Backend     *be,
  17     Connection  *conn,
  18     Operation   *op,
  19     char        *dn
  20 )
  21 {
  22         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  23         char    *matched = NULL;
  24         char    *pdn = NULL;
  25         Entry   *e, *p = NULL;
  26         int rootlock = 0;
  27         int     rc = -1;
  28
  29         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_delete: %s\n", dn, 0, 0);
  30
  31         /* get entry with writer lock */
  32         if ( (e = dn2entry_w( be, dn, &matched )) == NULL ) {
  33                 Debug(LDAP_DEBUG_ARGS, "<=- ldbm_back_delete: no such object %s\n",
  34                         dn, 0, 0);
  35                 send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT, matched, "" );
  36                 if ( matched != NULL ) {
  37                         free( matched );
  38                 }
  39                 return( -1 );
  40         }
  41
  42         Debug (LDAP_DEBUG_TRACE,
  43                 "rdwr_Xchk: readers_reading: %d writer_writing: %d\n",
  44                 e->e_rdwr.readers_reading, e->e_rdwr.writer_writing, 0);
  45
  46         /* check for deleted */
  47
  48         if ( has_children( be, e ) ) {
  49                 Debug(LDAP_DEBUG_ARGS, "<=- ldbm_back_delete: non leaf %s\n",
  50                         dn, 0, 0);
  51                 send_ldap_result( conn, op, LDAP_NOT_ALLOWED_ON_NONLEAF, "",
  52                     "" );
  53                 goto return_results;
  54         }
  55
  56 #ifdef SLAPD_CHILD_MODIFICATION_WITH_ENTRY_ACL
  57         if ( ! access_allowed( be, conn, op, e,
  58                 "entry", NULL, ACL_WRITE ) )
  59         {
  60                 Debug(LDAP_DEBUG_ARGS,
  61                         "<=- ldbm_back_delete: insufficient access %s\n",
  62                         dn, 0, 0);
  63                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
  64                 goto return_results;
  65         }
  66 #endif
  67
  68         Debug (LDAP_DEBUG_TRACE,
  69                 "rdwr_Xchk: readers_reading: %d writer_writing: %d\n",
  70                 e->e_rdwr.readers_reading, e->e_rdwr.writer_writing, 0);
  71
  72         /* delete from parent's id2children entry */
  73         if( (pdn = dn_parent( be, dn )) != NULL ) {
  74                 if( (p = dn2entry_w( be, pdn, &matched )) == NULL) {
  75                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n",
  76                                 0, 0, 0);
  77                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
  78                                 "", "");
  79                         goto return_results;
  80                 }
  81
  82 #ifndef SLAPD_CHILD_MODIFICATION_WITH_ENTRY_ACL
  83                 /* check parent for "children" acl */
  84                 if ( ! access_allowed( be, conn, op, p,
  85                         "children", NULL, ACL_WRITE ) )
  86                 {
  87                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
  88                                 0, 0 );
  89                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
  90                                 "", "" );
  91                         goto return_results;
  92                 }
  93 #endif
  94
  95         } else {
  96                 /* no parent, must be root to delete */
  97                 if( ! be_isroot( be, op->o_ndn ) ) {
  98                         Debug( LDAP_DEBUG_TRACE, "no parent & not root\n",
  99                                 0, 0, 0);
 100                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 101                                 "", "");
 102                         goto return_results;
 103                 }
 104
 105                 pthread_mutex_lock(&li->li_root_mutex);
 106                 rootlock = 1;
 107         }
 108
 109         if ( id2children_remove( be, p, e ) != 0 ) {
 110                 Debug(LDAP_DEBUG_ARGS,
 111                         "<=- ldbm_back_delete: operations error %s\n",
 112                         dn, 0, 0);
 113                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "","" );
 114                 goto return_results;
 115         }
 116
 117         /* delete from dn2id mapping */
 118         if ( dn2id_delete( be, e->e_dn ) != 0 ) {
 119                 Debug(LDAP_DEBUG_ARGS,
 120                         "<=- ldbm_back_delete: operations error %s\n",
 121                         dn, 0, 0);
 122                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 123                 goto return_results;
 124         }
 125
 126         /* delete from disk and cache */
 127         if ( id2entry_delete( be, e ) != 0 ) {
 128                 Debug(LDAP_DEBUG_ARGS,
 129                         "<=- ldbm_back_delete: operations error %s\n",
 130                         dn, 0, 0);
 131                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 132                 goto return_results;
 133         }
 134
 135         send_ldap_result( conn, op, LDAP_SUCCESS, "", "" );
 136         rc = 0;
 137
 138 return_results:;
 139         if ( pdn != NULL ) free(pdn);
 140
 141         if( p != NULL ) {
 142                 /* free parent and writer lock */
 143                 cache_return_entry_w( &li->li_cache, p );
 144         }
 145
 146         if ( rootlock ) {
 147                 /* release root lock */
 148                 pthread_mutex_unlock(&li->li_root_mutex);
 149         }
 150
 151         /* free entry and writer lock */
 152         cache_return_entry_w( &li->li_cache, e );
 153
 154         if ( matched != NULL ) free(matched);
 155
 156         return rc;
 157 }