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, *pdn;
  24         Entry           *p = NULL;
  25         int                     rootlock = 0;
  26         int                     rc = -1;
  27
  28         dn = e->e_ndn;
  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                 send_ldap_result( conn, op, LDAP_ALREADY_EXISTS, "", "" );
  39                 return( -1 );
  40         }
  41
  42         if ( global_schemacheck && oc_schema_check( e ) != 0 ) {
  43                 pthread_mutex_unlock(&li->li_add_mutex);
  44
  45                 Debug( LDAP_DEBUG_TRACE, "entry failed schema check\n",
  46                         0, 0, 0 );
  47
  48                 entry_free( e );
  49                 send_ldap_result( conn, op, LDAP_OBJECT_CLASS_VIOLATION, "",
  50                     "" );
  51                 return( -1 );
  52         }
  53
  54         /*
  55          * Get the parent dn and see if the corresponding entry exists.
  56          * If the parent does not exist, only allow the "root" user to
  57          * add the entry.
  58          */
  59
  60         if ( (pdn = dn_parent( be, dn )) != NULL ) {
  61                 char *matched = NULL;
  62
  63                 /* get parent with writer lock */
  64                 if ( (p = dn2entry_w( be, pdn, &matched )) == NULL ) {
  65                         pthread_mutex_unlock(&li->li_add_mutex);
  66                         Debug( LDAP_DEBUG_TRACE, "parent does not exist\n", 0,
  67                             0, 0 );
  68                         send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT,
  69                             matched, "" );
  70
  71                         if ( matched != NULL ) {
  72                                 free( matched );
  73                         }
  74
  75                         entry_free( e );
  76                         free( pdn );
  77                         return -1;
  78                 }
  79
  80                 /* don't need the add lock anymore */
  81                 pthread_mutex_unlock(&li->li_add_mutex);
  82
  83                 free(pdn);
  84
  85                 if ( matched != NULL ) {
  86                         free( matched );
  87                 }
  88
  89                 if ( ! access_allowed( be, conn, op, p,
  90                         "children", NULL, ACL_WRITE ) )
  91                 {
  92                         Debug( LDAP_DEBUG_TRACE, "no access to parent\n", 0,
  93                             0, 0 );
  94                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
  95                             "", "" );
  96
  97                         /* free parent and writer lock */
  98                         cache_return_entry_w( &li->li_cache, p );
  99
 100                         entry_free( e );
 101                         return -1;
 102                 }
 103
 104         } else {
 105                 /* no parent, must be adding entry to root */
 106                 if ( ! be_isroot( be, op->o_ndn ) ) {
 107                         pthread_mutex_unlock(&li->li_add_mutex);
 108                         Debug( LDAP_DEBUG_TRACE, "no parent & not root\n", 0,
 109                             0, 0 );
 110                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 111                             "", "" );
 112
 113                         entry_free( e );
 114                         return -1;
 115                 }
 116
 117                 /*
 118                  * no parent, acquire the root write lock
 119                  * and release the add lock.
 120                  */
 121                 pthread_mutex_lock(&li->li_root_mutex);
 122                 rootlock = 1;
 123                 pthread_mutex_unlock(&li->li_add_mutex);
 124         }
 125
 126         /*
 127          * Try to add the entry to the cache, assign it a new dnid
 128          * and mark it locked.  This should only fail if the entry
 129          * already exists.
 130          */
 131
 132         e->e_id = next_id( be );
 133         if ( cache_add_entry_lock( &li->li_cache, e, ENTRY_STATE_CREATING ) != 0 ) {
 134                 if( p != NULL) {
 135                         /* free parent and writer lock */
 136                         cache_return_entry_w( &li->li_cache, p );
 137                 }
 138                 if ( rootlock ) {
 139                         /* release root lock */
 140                         pthread_mutex_unlock(&li->li_root_mutex);
 141                 }
 142
 143                 Debug( LDAP_DEBUG_ANY, "cache_add_entry_lock failed\n", 0, 0,
 144                     0 );
 145                 next_id_return( be, e->e_id );
 146
 147                 /* XXX this should be ok, no other thread should have access
 148                  * because e hasn't been added to the cache yet
 149                  */
 150                 entry_free( e );
 151                 send_ldap_result( conn, op, LDAP_ALREADY_EXISTS, "", "" );
 152                 return( -1 );
 153         }
 154
 155         /* acquire writer lock */
 156         entry_rdwr_lock(e, 1);
 157
 158         /*
 159          * add it to the id2children index for the parent
 160          */
 161
 162         if ( id2children_add( be, p, e ) != 0 ) {
 163                 Debug( LDAP_DEBUG_TRACE, "id2children_add failed\n", 0,
 164                     0, 0 );
 165                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 166
 167                 goto return_results;
 168         }
 169
 170         /*
 171          * Add the entry to the attribute indexes, then add it to
 172          * the id2children index, dn2id index, and the id2entry index.
 173          */
 174
 175         /* attribute indexes */
 176         if ( index_add_entry( be, e ) != 0 ) {
 177                 Debug( LDAP_DEBUG_TRACE, "index_add_entry failed\n", 0,
 178                     0, 0 );
 179                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 180
 181                 goto return_results;
 182         }
 183
 184         /* dn2id index */
 185         if ( dn2id_add( be, dn, e->e_id ) != 0 ) {
 186                 Debug( LDAP_DEBUG_TRACE, "dn2id_add failed\n", 0,
 187                     0, 0 );
 188                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 189
 190                 goto return_results;
 191         }
 192
 193         /* id2entry index */
 194         if ( id2entry_add( be, e ) != 0 ) {
 195                 Debug( LDAP_DEBUG_TRACE, "id2entry_add failed\n", 0,
 196                     0, 0 );
 197                 (void) dn2id_delete( be, dn );
 198                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR, "", "" );
 199
 200                 goto return_results;
 201         }
 202
 203         send_ldap_result( conn, op, LDAP_SUCCESS, "", "" );
 204         rc = 0;
 205
 206 return_results:;
 207         cache_set_state( &li->li_cache, e, 0 );
 208
 209         if (p != NULL) {
 210                 /* free parent and writer lock */
 211                 cache_return_entry_w( &li->li_cache, p );
 212         }
 213
 214         if ( rootlock ) {
 215                 /* release root lock */
 216                 pthread_mutex_unlock(&li->li_root_mutex);
 217         }
 218
 219         /* free entry and writer lock */
 220         cache_return_entry_w( &li->li_cache, e );
 221
 222         return( rc );
 223 }