Integrate LDBM changes into BDB2...

[openldap] / servers / slapd / back-bdb2 / dn2id.c

diff --git a/servers/slapd/back-bdb2/dn2id.c b/servers/slapd/back-bdb2/dn2id.c
new file mode 100644 (file)
index 0000000..e77cabf
--- /dev/null
+++ b/servers/slapd/back-bdb2/dn2id.c
@@ -0,0 +1,206 @@
+/* dn2id.c - routines to deal with the dn2id index */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+#include "back-bdb2.h"
+#include "proto-back-bdb2.h"
+
+int
+bdb2i_dn2id_add(
+    BackendDB  *be,
+    char       *dn,
+    ID         id
+)
+{
+       int             rc, flags;
+       struct dbcache  *db;
+       Datum           key, data;
+       struct ldbminfo *li = (struct ldbminfo *) be->be_private;
+
+       ldbm_datum_init( key );
+       ldbm_datum_init( data );
+
+       Debug( LDAP_DEBUG_TRACE, "=> bdb2i_dn2id_add( \"%s\", %ld )\n", dn, id, 0 );
+
+       if ( (db = bdb2i_cache_open( be, "dn2id", BDB2_SUFFIX, LDBM_WRCREAT ))
+           == NULL ) {
+               Debug( LDAP_DEBUG_ANY, "Could not open/create dn2id%s\n",
+                   BDB2_SUFFIX, 0, 0 );
+               return( -1 );
+       }
+
+       dn = ch_strdup( dn );
+       dn_normalize_case( dn );
+
+       key.dptr = dn;
+       key.dsize = strlen( dn ) + 1;
+       data.dptr = (char *) &id;
+       data.dsize = sizeof(ID);
+
+       flags = LDBM_INSERT;
+       if ( li->li_dbcachewsync ) flags |= LDBM_SYNC;
+
+       rc = bdb2i_cache_store( db, key, data, flags );
+
+       free( dn );
+       bdb2i_cache_close( be, db );
+
+       Debug( LDAP_DEBUG_TRACE, "<= bdb2i_dn2id_add %d\n", rc, 0, 0 );
+       return( rc );
+}
+
+ID
+bdb2i_dn2id(
+    BackendDB  *be,
+    char       *dn
+)
+{
+       struct ldbminfo *li = (struct ldbminfo *) be->be_private;
+       struct dbcache  *db;
+       ID              id;
+       Datum           key, data;
+
+       ldbm_datum_init( key );
+       ldbm_datum_init( data );
+
+       dn = ch_strdup( dn );
+       Debug( LDAP_DEBUG_TRACE, "=> bdb2i_dn2id( \"%s\" )\n", dn, 0, 0 );
+       dn_normalize_case( dn );
+
+       /* first check the cache */
+       if ( (id = bdb2i_cache_find_entry_dn2id( be, &li->li_cache, dn )) != NOID ) {
+               free( dn );
+               Debug( LDAP_DEBUG_TRACE, "<= bdb2i_dn2id %ld (in cache)\n", id,
+                       0, 0 );
+               return( id );
+       }
+
+       if ( (db = bdb2i_cache_open( be, "dn2id", BDB2_SUFFIX, LDBM_WRCREAT ))
+               == NULL ) {
+               free( dn );
+               Debug( LDAP_DEBUG_ANY, "<= bdb2i_dn2id could not open dn2id%s\n",
+                       BDB2_SUFFIX, 0, 0 );
+               return( NOID );
+       }
+
+       key.dptr = dn;
+       key.dsize = strlen( dn ) + 1;
+
+       data = bdb2i_cache_fetch( db, key );
+
+       bdb2i_cache_close( be, db );
+       free( dn );
+
+       if ( data.dptr == NULL ) {
+               Debug( LDAP_DEBUG_TRACE, "<= bdb2i_dn2id NOID\n", 0, 0, 0 );
+               return( NOID );
+       }
+
+       (void) memcpy( (char *) &id, data.dptr, sizeof(ID) );
+
+       ldbm_datum_free( db->dbc_db, data );
+
+       Debug( LDAP_DEBUG_TRACE, "<= bdb2i_dn2id %ld\n", id, 0, 0 );
+       return( id );
+}
+
+int
+bdb2i_dn2id_delete(
+    BackendDB  *be,
+    char       *dn
+)
+{
+       struct dbcache  *db;
+       Datum           key;
+       int             rc;
+
+       ldbm_datum_init( key );
+
+       Debug( LDAP_DEBUG_TRACE, "=> bdb2i_dn2id_delete( \"%s\" )\n", dn, 0, 0 );
+
+       if ( (db = bdb2i_cache_open( be, "dn2id", BDB2_SUFFIX, LDBM_WRCREAT ))
+           == NULL ) {
+               Debug( LDAP_DEBUG_ANY,
+                   "<= bdb2i_dn2id_delete could not open dn2id%s\n", BDB2_SUFFIX,
+                   0, 0 );
+               return( -1 );
+       }
+
+       dn = ch_strdup( dn );
+       dn_normalize_case( dn );
+       key.dptr = dn;
+       key.dsize = strlen( dn ) + 1;
+
+       rc = bdb2i_cache_delete( db, key );
+
+       free( dn );
+
+       bdb2i_cache_close( be, db );
+
+       Debug( LDAP_DEBUG_TRACE, "<= bdb2i_dn2id_delete %d\n", rc, 0, 0 );
+       return( rc );
+}
+
+/*
+ * dn2entry - look up dn in the cache/indexes and return the corresponding
+ * entry.
+ */
+
+Entry *
+bdb2i_dn2entry_rw(
+    BackendDB  *be,
+    char       *dn,
+    Entry      **matched,
+    int         rw
+)
+{
+       struct ldbminfo *li = (struct ldbminfo *) be->be_private;
+       ID              id;
+       Entry           *e = NULL;
+       char            *pdn;
+
+       Debug(LDAP_DEBUG_TRACE, "dn2entry_%s: dn: \"%s\"\n",
+               rw ? "w" : "r", dn, 0);
+
+       if( matched != NULL ) {
+               /* caller cares about match */
+               *matched = NULL;
+       }
+
+       if ( (id = bdb2i_dn2id( be, dn )) != NOID &&
+               (e = bdb2i_id2entry_rw( be, id, rw )) != NULL )
+       {
+               return( e );
+       }
+
+       if ( id != NOID ) {
+               Debug(LDAP_DEBUG_ANY,
+                       "dn2entry_%s: no entry for valid id (%ld), dn \"%s\"\n",
+                       rw ? "w" : "r", id, dn);
+               /* must have been deleted from underneath us */
+               /* treat as if NOID was found */
+       }
+
+       /* caller doesn't care about match */
+       if( matched == NULL ) return NULL;
+
+       /* entry does not exist - see how much of the dn does exist */
+       /* dn_parent checks returns NULL if dn is suffix */
+       if ( (pdn = dn_parent( be, dn )) != NULL ) {
+               /* get entry with reader lock */
+               if ( (e = bdb2i_dn2entry_r( be, pdn, matched )) != NULL ) {
+                       *matched = e;
+               }
+               free( pdn );
+       }
+
+       return( NULL );
+}
+
+