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

   1 /* add.c - ldap ldbm back-end add routine */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6
   7 #include <ac/socket.h>
   8 #include <ac/string.h>
   9
  10 #include "slap.h"
  11 #include "back-ldbm.h"
  12 #include "proto-back-ldbm.h"
  13
  14 int
  15 ldbm_back_add(
  16     Backend     *be,
  17     Connection  *conn,
  18     Operation   *op,
  19     Entry       *e
  20 )
  21 {
  22         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  23         char            *dn = NULL, *pdn;
  24         Entry           *p = NULL;
  25         int                     rootlock = 0;
  26         int                     rc = -1;
  27
  28         dn = dn_normalize( ch_strdup( e->e_dn ) );
  29
  30         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_add: %s\n", dn, 0, 0);
  31
  32         /* nobody else can add until we lock our parent */
  33         pthread_mutex_lock(&li->li_add_mutex);
  34
  35         if ( ( dn2id( be, dn ) ) != NOID ) {
  36                 pthread_mutex_unlock(&li->li_add_mutex);
  37                 entry_free( e );
  38                 free( dn );
  39                 send_ldap_result( conn, op, LDAP_ALREADY_EXISTS, "", "" );
  40                 return( -1 );
  41         }
  42
  43         if ( global_schemacheck && oc_schema_check( e ) != 0 ) {
  44                 pthread_mutex_unlock(&li->li_add_mutex);
  45
  46                 Debug( LDAP_DEBUG_TRACE, "entry failed schema check\n",
  47                         0, 0, 0 );
  48
  49                 entry_free( e );
  50                 free( dn );
  51                 send_ldap_result( conn, op, LDAP_OBJECT_CLASS_VIOLATION, "",
  52                     "" );
  53                 return( -1 );
  54         }
  55
  56         /*
  57          * Get the parent dn and see if the corresponding entry exists.
  58          * If the parent does not exist, only allow the "root" user to
  59          * add the entry.
  60          */
  61
  62         if ( (pdn = dn_parent( be, dn )) != NULL ) {
  63                 char *matched = NULL;
  64
  65                 /* get parent with writer lock */
  66                 if ( (p = dn2entry_w( be, pdn, &matched )) == NULL ) {
  67                         pthread_mutex_unlock(&li->li_add_mutex);
  68                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n", 0,
  69                             0, 0 );
  70                         send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT,
  71                             matched, "" );
  72
  73                         if ( matched != NULL ) {
  74                                 free( matched );
  75                         }
  76
  77                         entry_free( e );
  78                         free( dn );
  79                         free( pdn );
  80                         return -1;
  81                 }
  82
  83                 /* don't need the add lock anymore */
  84                 pthread_mutex_unlock(&li->li_add_mutex);
  85
  86                 free(pdn);
  87
  88                 if ( matched != NULL ) {
  89                         free( matched );
  90                 }
  91
  92                 if ( ! access_allowed( be, conn, op, p, "children", NULL,
  93                     op->o_dn, ACL_WRITE ) )
  94                 {
  95                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
  96                             0, 0 );
  97                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
  98                             "", "" );
  99
 100                         /* free parent and writer lock */
 101                         cache_return_entry_w( &li->li_cache, p );
 102
 103                         entry_free( e );
 104                         free( dn );
 105                         return -1;
 106                 }
 107
 108         } else {
 109                 /* no parent, must be adding entry to root */
 110                 if ( ! be_isroot( be, op->o_dn ) ) {
 111                         pthread_mutex_unlock(&li->li_add_mutex);
 112                         Debug( LDAP_DEBUG_TRACE, "no parent & not root\n", 0,
 113                             0, 0 );
 114                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 115                             "", "" );
 116
 117                         entry_free( e );
 118                         free( dn );
 119                         return -1;
 120                 }
 121
 122                 /*
 123                  * no parent, acquire the root write lock
 124                  * and release the add lock.
 125                  */
 126                 pthread_mutex_lock(&li->li_root_mutex);
 127                 pthread_mutex_unlock(&li->li_add_mutex);
 128                 rootlock=1;
 129         }
 130
 131         /*
 132          * Try to add the entry to the cache, assign it a new dnid
 133          * and mark it locked.  This should only fail if the entry
 134          * already exists.
 135          */
 136
 137         e->e_id = next_id( be );
 138         if ( cache_add_entry_lock( &li->li_cache, e, ENTRY_STATE_CREATING ) != 0 ) {
 139                 if( p != NULL) {
 140                         /* free parent and writer lock */
 141                         cache_return_entry_w( &li->li_cache, p );
 142                 } else if ( rootlock ) {
 143                         /* release root lock */
 144                         pthread_mutex_unlock(&li->li_root_mutex);
 145                 }
 146
 147                 Debug( LDAP_DEBUG_ANY, "cache_add_entry_lock failed\n", 0, 0,
 148                     0 );
 149                 next_id_return( be, e->e_id );
 150
 151                 /* XXX this should be ok, no other thread should have access
 152                  * because e hasn't been added to the cache yet
 153                  */
 154                 entry_free( e );
 155                 free( dn );
 156                 send_ldap_result( conn, op, LDAP_ALREADY_EXISTS, "", "" );
 157                 return( -1 );
 158         }
 159
 160         /* acquire writer lock */
 161         entry_rdwr_lock(e, 1);
 162
 163         /*
 164          * add it to the id2children index for the parent
 165          */
 166
 167         if ( id2children_add( be, p, e ) != 0 ) {
 168                 Debug( LDAP_DEBUG_TRACE, "id2children_add failed\n", 0,
 169                     0, 0 );
 170                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 171
 172                 goto return_results;
 173         }
 174
 175         /*
 176          * Add the entry to the attribute indexes, then add it to
 177          * the id2children index, dn2id index, and the id2entry index.
 178          */
 179
 180         /* attribute indexes */
 181         if ( index_add_entry( be, e ) != 0 ) {
 182                 Debug( LDAP_DEBUG_TRACE, "index_add_entry failed\n", 0,
 183                     0, 0 );
 184                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 185
 186                 goto return_results;
 187         }
 188
 189         /* dn2id index */
 190         if ( dn2id_add( be, dn, e->e_id ) != 0 ) {
 191                 Debug( LDAP_DEBUG_TRACE, "dn2id_add failed\n", 0,
 192                     0, 0 );
 193                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 194
 195                 goto return_results;
 196         }
 197
 198         /* id2entry index */
 199         if ( id2entry_add( be, e ) != 0 ) {
 200                 Debug( LDAP_DEBUG_TRACE, "id2entry_add failed\n", 0,
 201                     0, 0 );
 202                 (void) dn2id_delete( be, dn );
 203                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 204
 205                 goto return_results;
 206         }
 207
 208         send_ldap_result( conn, op, LDAP_SUCCESS, "", "" );
 209         rc = 0;
 210
 211 return_results:;
 212         if ( dn != NULL )
 213                 free( dn );
 214
 215         cache_set_state( &li->li_cache, e, 0 );
 216
 217         if (p != NULL) {
 218                 /* free parent and writer lock */
 219                 cache_return_entry_w( &li->li_cache, p );
 220
 221         } else if ( rootlock ) {
 222                 /* release root lock */
 223                 pthread_mutex_unlock(&li->li_root_mutex);
 224         }
 225
 226         /* free entry and writer lock */
 227         cache_return_entry_w( &li->li_cache, e );
 228
 229         return( rc );
 230 }