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, "entry", NULL, op->o_dn,
  58             ACL_WRITE ) ) {
  59                 Debug(LDAP_DEBUG_ARGS,
  60                         "<=- ldbm_back_delete: insufficient access %s\n",
  61                         dn, 0, 0);
  62                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
  63                 goto return_results;
  64         }
  65 #endif
  66
  67         Debug (LDAP_DEBUG_TRACE,
  68                 "rdwr_Xchk: readers_reading: %d writer_writing: %d\n",
  69                 e->e_rdwr.readers_reading, e->e_rdwr.writer_writing, 0);
  70
  71         /* delete from parent's id2children entry */
  72         if( (pdn = dn_parent( be, dn )) != NULL ) {
  73                 if( (p = dn2entry_w( be, pdn, &matched )) == NULL) {
  74                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n",
  75                                 0, 0, 0);
  76                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
  77                                 "", "");
  78                         goto return_results;
  79                 }
  80
  81 #ifndef SLAPD_CHILD_MODIFICATION_WITH_ENTRY_ACL
  82                 /* check parent for "children" acl */
  83                 if ( ! access_allowed( be, conn, op, p, "children", NULL,
  84                         op->o_dn, ACL_WRITE ) )
  85                 {
  86                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
  87                                 0, 0 );
  88                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
  89                                 "", "" );
  90                         goto return_results;
  91                 }
  92 #endif
  93
  94         } else {
  95                 /* no parent, must be root to delete */
  96                 if( ! be_isroot( be, op->o_dn ) ) {
  97                         Debug( LDAP_DEBUG_TRACE, "no parent & not root\n",
  98                                 0, 0, 0);
  99                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 100                                 "", "");
 101                         goto return_results;
 102                 }
 103
 104                 pthread_mutex_lock(&li->li_root_mutex);
 105                 rootlock = 1;
 106         }
 107
 108         if ( id2children_remove( be, p, e ) != 0 ) {
 109                 Debug(LDAP_DEBUG_ARGS,
 110                         "<=- ldbm_back_delete: operations error %s\n",
 111                         dn, 0, 0);
 112                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "","" );
 113                 goto return_results;
 114         }
 115
 116         /* delete from dn2id mapping */
 117         if ( dn2id_delete( be, e->e_dn ) != 0 ) {
 118                 Debug(LDAP_DEBUG_ARGS,
 119                         "<=- ldbm_back_delete: operations error %s\n",
 120                         dn, 0, 0);
 121                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 122                 goto return_results;
 123         }
 124
 125         /* delete from disk and cache */
 126         if ( id2entry_delete( be, e ) != 0 ) {
 127                 Debug(LDAP_DEBUG_ARGS,
 128                         "<=- ldbm_back_delete: operations error %s\n",
 129                         dn, 0, 0);
 130                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 131                 goto return_results;
 132         }
 133
 134         send_ldap_result( conn, op, LDAP_SUCCESS, "", "" );
 135         rc = 0;
 136
 137 return_results:;
 138         if ( pdn != NULL ) free(pdn);
 139
 140         if( p != NULL ) {
 141                 /* free parent and writer lock */
 142                 cache_return_entry_w( &li->li_cache, p );
 143
 144         } else if ( rootlock ) {
 145                 /* release root lock */
 146                 pthread_mutex_unlock(&li->li_root_mutex);
 147         }
 148
 149         /* free entry and writer lock */
 150         cache_return_entry_w( &li->li_cache, e );
 151
 152         if ( matched != NULL ) free(matched);
 153
 154         return rc;
 155 }