From 90d97910474361a87571712e4dca235f90aa05c5 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Sat, 9 Apr 2005 10:01:13 +0000
Subject: [PATCH] ITS#3616 use fake context entry if suffix is empty.

---
 servers/slapd/back-bdb/cache.c |  5 +++++
 servers/slapd/back-bdb/dn2id.c |  3 +++
 servers/slapd/back-bdb/tools.c | 29 +++++++++++++++++++++++++++--
 3 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/servers/slapd/back-bdb/cache.c b/servers/slapd/back-bdb/cache.c
index dd7a661577..1f2f7a3b5a 100644
--- a/servers/slapd/back-bdb/cache.c
+++ b/servers/slapd/back-bdb/cache.c
@@ -316,6 +316,11 @@ bdb_cache_find_ndn(
 		if ( !ei2 ) {
 			int len = ei.bei_nrdn.bv_len;
 				
+			if ( BER_BVISEMPTY( ndn )) {
+				*res = eip;
+				return LDAP_SUCCESS;
+			}
+
 			ei.bei_nrdn.bv_len = ndn->bv_len -
 				(ei.bei_nrdn.bv_val - ndn->bv_val);
 			bdb_cache_entryinfo_unlock( eip );
diff --git a/servers/slapd/back-bdb/dn2id.c b/servers/slapd/back-bdb/dn2id.c
index 14f587f0fe..c16b8faf71 100644
--- a/servers/slapd/back-bdb/dn2id.c
+++ b/servers/slapd/back-bdb/dn2id.c
@@ -418,6 +418,9 @@ int hdb_fix_dn(
 	char *ptr, *nptr;
 	int max = 0;
 
+	if ( !e->e_id )
+		return 0;
+
 	/* count length of all DN components */
 	for ( ei = BEI(e); ei && ei->bei_id; ei=ei->bei_parent ) {
 		rlen += ei->bei_rdn.bv_len + 1;
diff --git a/servers/slapd/back-bdb/tools.c b/servers/slapd/back-bdb/tools.c
index 530b0f3dee..c82ba73178 100644
--- a/servers/slapd/back-bdb/tools.c
+++ b/servers/slapd/back-bdb/tools.c
@@ -142,6 +142,9 @@ ID bdb_tool_dn2id_get(
 	Opheader ohdr = {0};
 	EntryInfo ei = {0};
 
+	if ( BER_BVISEMPTY(dn) )
+		return 0;
+
 	op.o_hdr = &ohdr;
 	op.o_bd = be;
 	op.o_tmpmemctx = NULL;
@@ -154,13 +157,31 @@ ID bdb_tool_dn2id_get(
 	return ei.bei_id;
 }
 
+static struct berval ocbva[] = {
+	BER_BVC("locality"),
+	BER_BVC("syncProviderSubentry"),
+	BER_BVNULL
+};
+
 int bdb_tool_id2entry_get(
 	Backend *be,
 	ID id,
 	Entry **e
 )
 {
-	return bdb_id2entry( be, NULL, id, e );
+	int rc = bdb_id2entry( be, NULL, id, e );
+
+	if ( rc == DB_NOTFOUND && id == 0 ) {
+		Entry *dummy = ch_calloc( 1, sizeof(Entry) );
+		dummy->e_name.bv_val = ch_strdup( "" );
+		dummy->e_nname.bv_val = ch_strdup( "" );
+		attr_merge( dummy, slap_schema.si_ad_objectClass, ocbva, NULL );
+		attr_merge_one( dummy, slap_schema.si_ad_structuralObjectClass,
+			&ocbva[0], NULL );
+		*e = dummy;
+		rc = LDAP_SUCCESS;
+	}
+	return rc;
 }
 
 Entry* bdb_tool_entry_get( BackendDB *be, ID id )
@@ -510,7 +531,6 @@ ID bdb_tool_entry_modify(
 	assert( text->bv_val[0] == '\0' );	/* overconservative? */
 
 	assert ( e->e_id != NOID );
-	assert ( e->e_id != 0 );
 
 	Debug( LDAP_DEBUG_TRACE,
 		"=> " LDAP_XSTRING(bdb_tool_entry_modify) "( %ld, \"%s\" )\n",
@@ -547,6 +567,10 @@ ID bdb_tool_entry_modify(
 		goto done;
 	}
 
+#if 0
+	/* FIXME: this is bogus, we don't have the old values to delete
+	 * from the index because the given entry has already been modified.
+	 */
 	rc = bdb_index_entry_del( &op, tid, e );
 	if( rc != 0 ) {
 		snprintf( text->bv_val, text->bv_len,
@@ -557,6 +581,7 @@ ID bdb_tool_entry_modify(
 			text->bv_val, 0, 0 );
 		goto done;
 	}
+#endif
 
 	rc = bdb_index_entry_add( &op, tid, e );
 	if( rc != 0 ) {
-- 
2.39.5