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

   1 /* attribute.c - bdb backend acl attribute routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 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/socket.h>
  13 #include <ac/string.h>
  14
  15 #include "slap.h"
  16 #include "back-bdb.h"
  17 #include "proto-bdb.h"
  18
  19 /* return LDAP_SUCCESS IFF we can retrieve the attributes
  20  * of entry with e_ndn
  21  */
  22 int
  23 bdb_attribute(
  24         Backend *be,
  25         Connection *conn,
  26         Operation *op,
  27         Entry *target,
  28         struct berval *entry_ndn,
  29         AttributeDescription *entry_at,
  30         BerVarray *vals )
  31 {
  32         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  33         struct bdb_op_info *boi = NULL;
  34         DB_TXN *txn = NULL;
  35         Entry *e;
  36         int     i, j = 0, rc;
  37         Attribute *attr;
  38         BerVarray v;
  39         const char *entry_at_name = entry_at->ad_cname.bv_val;
  40         AccessControlState acl_state = ACL_STATE_INIT;
  41
  42         u_int32_t       locker = 0;
  43         DB_LOCK         lock;
  44         int             free_lock_id = 0;
  45
  46 #ifdef NEW_LOGGING
  47         LDAP_LOG( BACK_BDB, ARGS,
  48                 "bdb_attribute: gr ndn: \"%s\"\n", entry_ndn->bv_val, 0, 0 );
  49         LDAP_LOG( BACK_BDB, ARGS,
  50                 "bdb_attribute: at: \"%s\"\n", entry_at_name, 0, 0);
  51         LDAP_LOG( BACK_BDB, ARGS, "bdb_attribute: tr ndn: \"%s\"\n",
  52                 target ? target->e_ndn : "", 0, 0 );
  53 #else
  54         Debug( LDAP_DEBUG_ARGS,
  55                 "=> bdb_attribute: gr ndn: \"%s\"\n",
  56                 entry_ndn->bv_val, 0, 0 );
  57         Debug( LDAP_DEBUG_ARGS,
  58                 "=> bdb_attribute: at: \"%s\"\n",
  59                 entry_at_name, 0, 0 );
  60
  61         Debug( LDAP_DEBUG_ARGS,
  62                 "=> bdb_attribute: tr ndn: \"%s\"\n",
  63                 target ? target->e_ndn : "", 0, 0 );
  64 #endif
  65
  66         if( op ) boi = (struct bdb_op_info *) op->o_private;
  67         if( boi != NULL && be == boi->boi_bdb ) {
  68                 txn = boi->boi_txn;
  69                 locker = boi->boi_locker;
  70         }
  71
  72         if ( txn != NULL ) {
  73                 locker = TXN_ID ( txn );
  74         } else if ( !locker ) {
  75                 rc = LOCK_ID ( bdb->bi_dbenv, &locker );
  76                 free_lock_id = 1;
  77                 switch(rc) {
  78                 case 0:
  79                         break;
  80                 default:
  81                         return LDAP_OTHER;
  82                 }
  83         }
  84
  85         if (target != NULL && dn_match(&target->e_nname, entry_ndn)) {
  86                 /* we already have a LOCKED copy of the entry */
  87                 e = target;
  88 #ifdef NEW_LOGGING
  89                 LDAP_LOG( BACK_BDB, DETAIL1,
  90                         "bdb_attribute: target is LOCKED (%s)\n", entry_ndn->bv_val, 0, 0 );
  91 #else
  92                 Debug( LDAP_DEBUG_ARGS,
  93                         "=> bdb_attribute: target is entry: \"%s\"\n",
  94                         entry_ndn->bv_val, 0, 0 );
  95 #endif
  96
  97         } else {
  98 dn2entry_retry:
  99                 /* can we find entry */
 100                 rc = bdb_dn2entry_r( be, txn, entry_ndn, &e, NULL, 0, locker, &lock );
 101                 switch( rc ) {
 102                 case DB_NOTFOUND:
 103                 case 0:
 104                         break;
 105                 case DB_LOCK_DEADLOCK:
 106                 case DB_LOCK_NOTGRANTED:
 107                         /* the txn must abort and retry */
 108                         if ( txn ) {
 109                                 boi->boi_err = rc;
 110                                 return LDAP_BUSY;
 111                         }
 112                         ldap_pvt_thread_yield();
 113                         goto dn2entry_retry;
 114                 default:
 115                         boi->boi_err = rc;
 116                         if ( free_lock_id ) {
 117                                 LOCK_ID_FREE( bdb->bi_dbenv, locker );
 118                         }
 119                         return (rc != LDAP_BUSY) ? LDAP_OTHER : LDAP_BUSY;
 120                 }
 121                 if (e == NULL) {
 122 #ifdef NEW_LOGGING
 123                         LDAP_LOG( BACK_BDB, INFO,
 124                                 "bdb_attribute: cannot find entry (%s)\n",
 125                                 entry_ndn->bv_val, 0, 0 );
 126 #else
 127                         Debug( LDAP_DEBUG_ACL,
 128                                 "=> bdb_attribute: cannot find entry: \"%s\"\n",
 129                                         entry_ndn->bv_val, 0, 0 );
 130 #endif
 131                         if ( free_lock_id ) {
 132                                 LOCK_ID_FREE( bdb->bi_dbenv, locker );
 133                         }
 134                         return LDAP_NO_SUCH_OBJECT;
 135                 }
 136
 137 #ifdef NEW_LOGGING
 138                 LDAP_LOG( BACK_BDB, DETAIL1, "bdb_attribute: found entry (%s)\n",
 139                         entry_ndn->bv_val, 0, 0 );
 140 #else
 141                 Debug( LDAP_DEBUG_ACL,
 142                         "=> bdb_attribute: found entry: \"%s\"\n",
 143                         entry_ndn->bv_val, 0, 0 );
 144 #endif
 145         }
 146
 147 #ifdef BDB_ALIASES
 148         /* find attribute values */
 149         if( is_entry_alias( e ) ) {
 150 #ifdef NEW_LOGGING
 151                 LDAP_LOG( BACK_BDB, INFO,
 152                         "bdb_attribute: entry (%s) is an alias\n", e->e_dn, 0, 0 );
 153 #else
 154                 Debug( LDAP_DEBUG_ACL,
 155                         "<= bdb_attribute: entry is an alias\n", 0, 0, 0 );
 156 #endif
 157                 rc = LDAP_ALIAS_PROBLEM;
 158                 goto return_results;
 159         }
 160 #endif
 161
 162         if( is_entry_referral( e ) ) {
 163 #ifdef NEW_LOGGING
 164                 LDAP_LOG( BACK_BDB, INFO,
 165                         "bdb_attribute: entry (%s) is a referral.\n", e->e_dn, 0, 0);
 166 #else
 167                 Debug( LDAP_DEBUG_ACL,
 168                         "<= bdb_attribute: entry is a referral\n", 0, 0, 0 );
 169 #endif
 170                 rc = LDAP_REFERRAL;
 171                 goto return_results;
 172         }
 173
 174         if ((attr = attr_find(e->e_attrs, entry_at)) == NULL) {
 175 #ifdef NEW_LOGGING
 176                 LDAP_LOG( BACK_BDB, INFO,
 177                         "bdb_attribute: failed to find %s.\n", entry_at_name, 0, 0 );
 178 #else
 179                 Debug( LDAP_DEBUG_ACL,
 180                         "<= bdb_attribute: failed to find %s\n",
 181                         entry_at_name, 0, 0 );
 182 #endif
 183                 rc = LDAP_NO_SUCH_ATTRIBUTE;
 184                 goto return_results;
 185         }
 186
 187         if (conn != NULL && op != NULL
 188                 && access_allowed( be, conn, op, e, entry_at, NULL,
 189                         ACL_AUTH, &acl_state ) == 0 )
 190         {
 191                 rc = LDAP_INSUFFICIENT_ACCESS;
 192                 goto return_results;
 193         }
 194
 195         for ( i = 0; attr->a_vals[i].bv_val != NULL; i++ ) {
 196                 /* count them */
 197         }
 198
 199         v = (BerVarray) ch_malloc( sizeof(struct berval) * (i+1) );
 200
 201         for ( i=0, j=0; attr->a_vals[i].bv_val != NULL; i++ ) {
 202                 if( conn != NULL
 203                         && op != NULL
 204                         && access_allowed(be, conn, op, e, entry_at,
 205                                 &attr->a_vals[i], ACL_AUTH, &acl_state ) == 0)
 206                 {
 207                         continue;
 208                 }
 209                 ber_dupbv( &v[j], &attr->a_vals[i] );
 210
 211                 if( v[j].bv_val != NULL ) j++;
 212         }
 213
 214         if( j == 0 ) {
 215                 ch_free( v );
 216                 *vals = NULL;
 217                 rc = LDAP_INSUFFICIENT_ACCESS;
 218         } else {
 219                 v[j].bv_val = NULL;
 220                 v[j].bv_len = 0;
 221                 *vals = v;
 222                 rc = LDAP_SUCCESS;
 223         }
 224
 225 return_results:
 226         if( target != e ) {
 227                 /* free entry */
 228                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 229         }
 230
 231         if ( free_lock_id ) {
 232                 LOCK_ID_FREE( bdb->bi_dbenv, locker );
 233         }
 234
 235 #ifdef NEW_LOGGING
 236         LDAP_LOG( BACK_BDB, ENTRY, "bdb_attribute: rc=%d nvals=%d.\n", rc, j, 0 );
 237 #else
 238         Debug( LDAP_DEBUG_TRACE,
 239                 "bdb_attribute: rc=%d nvals=%d\n",
 240                 rc, j, 0 );
 241 #endif
 242         return(rc);
 243 }