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688 lines
16 KiB
C
688 lines
16 KiB
C
/* id2entry.c - routines to deal with the id2entry database */
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/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 2000-2011 The OpenLDAP Foundation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/errno.h>
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#include "back-mdb.h"
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static int mdb_entry_encode(Operation *op, MDB_txn *txn, Entry *e, MDB_val *data);
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static Entry *mdb_entry_alloc( Operation *op, int nattrs, int nvals );
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static int mdb_id2entry_put(
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Operation *op,
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MDB_txn *tid,
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Entry *e,
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int flag )
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{
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struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
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MDB_dbi dbi = mdb->mi_id2entry;
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MDB_val key, data, d2;
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int rc;
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/* We only store rdns, and they go in the dn2id database. */
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key.mv_data = &e->e_id;
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key.mv_size = sizeof(ID);
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rc = mdb_entry_encode( op, tid, e, &d2 );
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if( rc != LDAP_SUCCESS ) {
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return LDAP_OTHER;
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}
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again:
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data = d2;
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rc = mdb_put( tid, dbi, &key, &data, flag );
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if (rc) {
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/* Was there a hole from slapadd? */
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if ( flag == MDB_NOOVERWRITE && data.mv_size == 0 ) {
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flag = 0;
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goto again;
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}
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Debug( LDAP_DEBUG_ANY,
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"mdb_id2entry_put: mdb_put failed: %s(%d) \"%s\"\n",
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mdb_strerror(rc), rc,
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e->e_nname.bv_val );
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rc = LDAP_OTHER;
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}
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op->o_tmpfree( d2.mv_data, op->o_tmpmemctx );
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return rc;
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}
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/*
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* This routine adds (or updates) an entry on disk.
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* The cache should be already be updated.
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*/
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int mdb_id2entry_add(
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Operation *op,
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MDB_txn *tid,
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Entry *e )
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{
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return mdb_id2entry_put(op, tid, e, MDB_NOOVERWRITE);
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}
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int mdb_id2entry_update(
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Operation *op,
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MDB_txn *tid,
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Entry *e )
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{
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return mdb_id2entry_put(op, tid, e, 0);
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}
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int mdb_id2entry(
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Operation *op,
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MDB_cursor *mc,
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ID id,
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Entry **e )
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{
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struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
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MDB_val key, data;
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int rc = 0;
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*e = NULL;
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key.mv_data = &id;
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key.mv_size = sizeof(ID);
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/* fetch it */
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rc = mdb_cursor_get( mc, &key, &data, MDB_SET );
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if ( rc == MDB_NOTFOUND ) {
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/* Looking for root entry on an empty-dn suffix? */
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if ( !id && BER_BVISEMPTY( &op->o_bd->be_nsuffix[0] )) {
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struct berval gluebv = BER_BVC("glue");
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Entry *r = mdb_entry_alloc(op, 2, 4);
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Attribute *a = r->e_attrs;
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struct berval *bptr;
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r->e_id = 0;
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r->e_ocflags = SLAP_OC_GLUE|SLAP_OC__END;
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bptr = a->a_vals;
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a->a_flags = SLAP_ATTR_DONT_FREE_DATA | SLAP_ATTR_DONT_FREE_VALS;
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a->a_desc = slap_schema.si_ad_objectClass;
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a->a_nvals = a->a_vals;
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a->a_numvals = 1;
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*bptr++ = gluebv;
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BER_BVZERO(bptr);
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bptr++;
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a->a_next = a+1;
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a = a->a_next;
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a->a_flags = SLAP_ATTR_DONT_FREE_DATA | SLAP_ATTR_DONT_FREE_VALS;
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a->a_desc = slap_schema.si_ad_structuralObjectClass;
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a->a_vals = bptr;
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a->a_nvals = a->a_vals;
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a->a_numvals = 1;
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*bptr++ = gluebv;
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BER_BVZERO(bptr);
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a->a_next = NULL;
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*e = r;
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return MDB_SUCCESS;
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}
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}
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if ( rc ) return rc;
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rc = mdb_entry_decode( op, &data, e );
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if ( rc ) return rc;
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(*e)->e_id = id;
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(*e)->e_name.bv_val = NULL;
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(*e)->e_nname.bv_val = NULL;
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return rc;
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}
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int mdb_id2entry_delete(
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BackendDB *be,
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MDB_txn *tid,
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Entry *e )
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{
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struct mdb_info *mdb = (struct mdb_info *) be->be_private;
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MDB_dbi dbi = mdb->mi_id2entry;
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MDB_val key;
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int rc;
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key.mv_data = &e->e_id;
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key.mv_size = sizeof(ID);
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/* delete from database */
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rc = mdb_del( tid, dbi, &key, NULL );
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return rc;
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}
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static Entry * mdb_entry_alloc(
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Operation *op,
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int nattrs,
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int nvals )
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{
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Entry *e = op->o_tmpalloc( sizeof(Entry) +
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nattrs * sizeof(Attribute) +
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nvals * sizeof(struct berval), op->o_tmpmemctx );
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BER_BVZERO(&e->e_bv);
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e->e_private = e;
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if (nattrs) {
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e->e_attrs = (Attribute *)(e+1);
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e->e_attrs->a_vals = (struct berval *)(e->e_attrs+nattrs);
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} else {
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e->e_attrs = NULL;
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}
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return e;
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}
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int mdb_entry_return(
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Operation *op,
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Entry *e
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)
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{
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if ( e->e_private ) {
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if ( slapMode & SLAP_TOOL_MODE ) {
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ch_free( e->e_nname.bv_val );
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ch_free( e->e_name.bv_val );
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ch_free( e );
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} else {
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op->o_tmpfree( e->e_nname.bv_val, op->o_tmpmemctx );
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op->o_tmpfree( e->e_name.bv_val, op->o_tmpmemctx );
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op->o_tmpfree( e, op->o_tmpmemctx );
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}
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} else {
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entry_free( e );
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}
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return 0;
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}
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int mdb_entry_release(
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Operation *op,
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Entry *e,
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int rw )
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{
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struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
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struct mdb_op_info *moi = NULL;
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int rc;
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/* slapMode : SLAP_SERVER_MODE, SLAP_TOOL_MODE,
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SLAP_TRUNCATE_MODE, SLAP_UNDEFINED_MODE */
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mdb_entry_return( op, e );
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if ( slapMode == SLAP_SERVER_MODE ) {
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OpExtra *oex;
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LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
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if ( oex->oe_key == mdb ) {
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moi = (mdb_op_info *)oex;
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/* If it was setup by entry_get we should probably free it */
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if ( moi->moi_flag & MOI_FREEIT ) {
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moi->moi_ref--;
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if ( moi->moi_ref < 1 ) {
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mdb_txn_reset( moi->moi_txn );
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moi->moi_ref = 0;
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LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
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op->o_tmpfree( moi, op->o_tmpmemctx );
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}
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}
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break;
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}
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}
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}
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return 0;
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}
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/* return LDAP_SUCCESS IFF we can retrieve the specified entry.
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*/
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int mdb_entry_get(
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Operation *op,
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struct berval *ndn,
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ObjectClass *oc,
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AttributeDescription *at,
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int rw,
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Entry **ent )
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{
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struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
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struct mdb_op_info *moi = NULL;
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MDB_txn *txn = NULL;
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Entry *e = NULL;
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int rc;
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const char *at_name = at ? at->ad_cname.bv_val : "(null)";
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Debug( LDAP_DEBUG_ARGS,
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"=> mdb_entry_get: ndn: \"%s\"\n", ndn->bv_val, 0, 0 );
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Debug( LDAP_DEBUG_ARGS,
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"=> mdb_entry_get: oc: \"%s\", at: \"%s\"\n",
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oc ? oc->soc_cname.bv_val : "(null)", at_name, 0);
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rc = mdb_opinfo_get( op, mdb, rw == 0, &moi );
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if ( rc )
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return LDAP_OTHER;
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txn = moi->moi_txn;
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/* can we find entry */
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rc = mdb_dn2entry( op, txn, ndn, &e, 0 );
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switch( rc ) {
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case MDB_NOTFOUND:
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case 0:
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break;
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default:
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return (rc != LDAP_BUSY) ? LDAP_OTHER : LDAP_BUSY;
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}
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if (e == NULL) {
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Debug( LDAP_DEBUG_ACL,
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"=> mdb_entry_get: cannot find entry: \"%s\"\n",
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ndn->bv_val, 0, 0 );
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rc = LDAP_NO_SUCH_OBJECT;
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goto return_results;
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}
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Debug( LDAP_DEBUG_ACL,
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"=> mdb_entry_get: found entry: \"%s\"\n",
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ndn->bv_val, 0, 0 );
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if ( oc && !is_entry_objectclass( e, oc, 0 )) {
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Debug( LDAP_DEBUG_ACL,
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"<= mdb_entry_get: failed to find objectClass %s\n",
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oc->soc_cname.bv_val, 0, 0 );
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rc = LDAP_NO_SUCH_ATTRIBUTE;
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goto return_results;
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}
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/* NOTE: attr_find() or attrs_find()? */
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if ( at && attr_find( e->e_attrs, at ) == NULL ) {
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Debug( LDAP_DEBUG_ACL,
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"<= mdb_entry_get: failed to find attribute %s\n",
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at->ad_cname.bv_val, 0, 0 );
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rc = LDAP_NO_SUCH_ATTRIBUTE;
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goto return_results;
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}
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return_results:
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if( rc != LDAP_SUCCESS ) {
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/* free entry */
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if ( e )
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mdb_entry_return( op, e );
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if (moi->moi_ref == 1) {
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LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
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mdb_txn_reset( txn );
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op->o_tmpfree( moi, op->o_tmpmemctx );
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}
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} else {
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*ent = e;
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}
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Debug( LDAP_DEBUG_TRACE,
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"mdb_entry_get: rc=%d\n",
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rc, 0, 0 );
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return(rc);
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}
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static void
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mdb_reader_free( void *key, void *data )
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{
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MDB_txn *txn = data;
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if ( txn ) mdb_txn_abort( txn );
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}
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/* free up any keys used by the main thread */
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void
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mdb_reader_flush( MDB_env *env )
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{
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void *data;
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void *ctx = ldap_pvt_thread_pool_context();
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if ( !ldap_pvt_thread_pool_getkey( ctx, env, &data, NULL ) ) {
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ldap_pvt_thread_pool_setkey( ctx, env, NULL, 0, NULL, NULL );
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mdb_reader_free( env, data );
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}
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}
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int
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mdb_opinfo_get( Operation *op, struct mdb_info *mdb, int rdonly, mdb_op_info **moip )
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{
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int rc, renew = 0;
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void *data;
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void *ctx;
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mdb_op_info *moi = NULL;
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OpExtra *oex;
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assert( op != NULL );
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if ( !mdb || !moip ) return -1;
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/* If no op was provided, try to find the ctx anyway... */
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if ( op ) {
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ctx = op->o_threadctx;
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} else {
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ctx = ldap_pvt_thread_pool_context();
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}
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if ( op ) {
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LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
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if ( oex->oe_key == mdb ) break;
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}
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moi = (mdb_op_info *)oex;
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}
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if ( !moi ) {
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moi = *moip;
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if ( !moi ) {
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if ( op ) {
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moi = op->o_tmpalloc(sizeof(struct mdb_op_info),op->o_tmpmemctx);
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} else {
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moi = ch_malloc(sizeof(mdb_op_info));
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}
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moi->moi_flag = MOI_FREEIT;
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*moip = moi;
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}
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LDAP_SLIST_INSERT_HEAD( &op->o_extra, &moi->moi_oe, oe_next );
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moi->moi_oe.oe_key = mdb;
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moi->moi_ref = 0;
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moi->moi_txn = NULL;
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}
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if ( !rdonly ) {
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/* This op started as a reader, but now wants to write. */
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if ( moi->moi_flag & MOI_READER ) {
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moi = *moip;
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LDAP_SLIST_INSERT_HEAD( &op->o_extra, &moi->moi_oe, oe_next );
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} else {
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/* This op is continuing an existing write txn */
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*moip = moi;
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}
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moi->moi_ref++;
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if ( !moi->moi_txn ) {
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rc = mdb_txn_begin( mdb->mi_dbenv, 0, &moi->moi_txn );
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if (rc) {
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Debug( LDAP_DEBUG_ANY, "mdb_opinfo_get: err %s(%d)\n",
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mdb_strerror(rc), rc, 0 );
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}
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return rc;
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}
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return 0;
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}
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/* OK, this is a reader */
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if ( !moi->moi_txn ) {
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if ( !ctx ) {
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/* Shouldn't happen unless we're single-threaded */
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rc = mdb_txn_begin( mdb->mi_dbenv, MDB_RDONLY, &moi->moi_txn );
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if (rc) {
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Debug( LDAP_DEBUG_ANY, "mdb_opinfo_get: err %s(%d)\n",
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mdb_strerror(rc), rc, 0 );
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}
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return rc;
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}
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if ( ldap_pvt_thread_pool_getkey( ctx, mdb->mi_dbenv, &data, NULL ) ) {
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rc = mdb_txn_begin( mdb->mi_dbenv, MDB_RDONLY, &moi->moi_txn );
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if (rc) {
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Debug( LDAP_DEBUG_ANY, "mdb_opinfo_get: err %s(%d)\n",
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mdb_strerror(rc), rc, 0 );
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return rc;
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}
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data = moi->moi_txn;
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if ( ( rc = ldap_pvt_thread_pool_setkey( ctx, mdb->mi_dbenv,
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data, mdb_reader_free, NULL, NULL ) ) ) {
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mdb_txn_abort( moi->moi_txn );
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moi->moi_txn = NULL;
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Debug( LDAP_DEBUG_ANY, "mdb_opinfo_get: thread_pool_setkey failed err (%d)\n",
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rc, 0, 0 );
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return rc;
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}
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} else {
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moi->moi_txn = data;
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renew = 1;
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}
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moi->moi_flag |= MOI_READER;
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}
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if ( moi->moi_ref < 1 ) {
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moi->moi_ref = 0;
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}
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if ( renew ) {
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mdb_txn_renew( moi->moi_txn );
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}
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moi->moi_ref++;
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if ( *moip != moi )
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*moip = moi;
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return 0;
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}
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typedef struct Ecount {
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ber_len_t len;
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int nattrs;
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int nvals;
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int offset;
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} Ecount;
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/* Count up the sizes of the components of an entry */
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static int mdb_entry_partsize(struct mdb_info *mdb, MDB_txn *txn, Entry *e,
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Ecount *eh)
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{
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ber_len_t len;
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int i, nat = 0, nval = 0, nnval = 0;
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Attribute *a;
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len = 4*sizeof(int); /* nattrs, nvals, ocflags, offset */
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for (a=e->e_attrs; a; a=a->a_next) {
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/* For AttributeDesc, we only store the attr index */
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nat++;
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if (!mdb->mi_adxs[a->a_desc->ad_index]) {
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int rc = mdb_ad_get(mdb, txn, a->a_desc);
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if (rc)
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return rc;
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}
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len += 2*sizeof(int); /* AD index, numvals */
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nval += a->a_numvals + 1; /* empty berval at end */
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for (i=0; i<a->a_numvals; i++) {
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len += a->a_vals[i].bv_len + 1 + sizeof(int); /* len */
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}
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if (a->a_nvals != a->a_vals) {
|
|
nval += a->a_numvals + 1;
|
|
nnval++;
|
|
for (i=0; i<a->a_numvals; i++) {
|
|
len += a->a_nvals[i].bv_len + 1 + sizeof(int);;
|
|
}
|
|
}
|
|
}
|
|
/* padding */
|
|
len = (len + sizeof(ID)-1) & ~(sizeof(ID)-1);
|
|
eh->len = len;
|
|
eh->nattrs = nat;
|
|
eh->nvals = nval;
|
|
eh->offset = nat + nval - nnval;
|
|
return 0;
|
|
}
|
|
|
|
#define HIGH_BIT (1<<(sizeof(unsigned int)*CHAR_BIT-1))
|
|
|
|
/* Flatten an Entry into a buffer. The buffer starts with the count of the
|
|
* number of attributes in the entry, the total number of values in the
|
|
* entry, and the e_ocflags. It then contains a list of integers for each
|
|
* attribute. For each attribute the first integer gives the index of the
|
|
* matching AttributeDescription, followed by the number of values in the
|
|
* attribute. If the high bit is set, the attribute also has normalized
|
|
* values present. (Note - a_numvals is an unsigned int, so this means
|
|
* it's possible to receive an attribute that we can't encode due to size
|
|
* overflow. In practice, this should not be an issue.) Then the length
|
|
* of each value is listed. If there are normalized values, their lengths
|
|
* come next. This continues for each attribute. After all of the lengths
|
|
* for the last attribute, the actual values are copied, with a NUL
|
|
* terminator after each value. The buffer is padded to the sizeof(ID).
|
|
* The entire buffer size is precomputed so that a single malloc can be
|
|
* performed.
|
|
*/
|
|
static int mdb_entry_encode(Operation *op, MDB_txn *txn, Entry *e, MDB_val *data)
|
|
{
|
|
struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
|
|
ber_len_t len, i;
|
|
Ecount eh;
|
|
int rc;
|
|
Attribute *a;
|
|
unsigned char *ptr;
|
|
unsigned int *lp, l;
|
|
|
|
Debug( LDAP_DEBUG_TRACE, "=> mdb_entry_encode(0x%08lx): %s\n",
|
|
(long) e->e_id, e->e_dn, 0 );
|
|
|
|
/* make sure e->e_ocflags is set */
|
|
if (is_entry_referral(e))
|
|
; /* empty */
|
|
|
|
rc = mdb_entry_partsize( mdb, txn, e, &eh );
|
|
if (rc) return rc;
|
|
|
|
data->mv_size = eh.len;
|
|
data->mv_data = op->o_tmpalloc(data->mv_size, op->o_tmpmemctx);
|
|
lp = (unsigned int *)data->mv_data;
|
|
*lp++ = eh.nattrs;
|
|
*lp++ = eh.nvals;
|
|
*lp++ = (unsigned int)e->e_ocflags;
|
|
*lp++ = eh.offset;
|
|
ptr = (unsigned char *)(lp + eh.offset);
|
|
|
|
for (a=e->e_attrs; a; a=a->a_next) {
|
|
*lp++ = mdb->mi_adxs[a->a_desc->ad_index];
|
|
l = a->a_numvals;
|
|
if (a->a_nvals != a->a_vals)
|
|
l |= HIGH_BIT;
|
|
*lp++ = l;
|
|
if (a->a_vals) {
|
|
for (i=0; a->a_vals[i].bv_val; i++);
|
|
assert( i == a->a_numvals );
|
|
for (i=0; i<a->a_numvals; i++) {
|
|
*lp++ = a->a_vals[i].bv_len;
|
|
memcpy(ptr, a->a_vals[i].bv_val,
|
|
a->a_vals[i].bv_len);
|
|
ptr += a->a_vals[i].bv_len;
|
|
*ptr++ = '\0';
|
|
}
|
|
if (a->a_nvals != a->a_vals) {
|
|
for (i=0; i<a->a_numvals; i++) {
|
|
*lp++ = a->a_nvals[i].bv_len;
|
|
memcpy(ptr, a->a_nvals[i].bv_val,
|
|
a->a_nvals[i].bv_len);
|
|
ptr += a->a_nvals[i].bv_len;
|
|
*ptr++ = '\0';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Debug( LDAP_DEBUG_TRACE, "<= mdb_entry_encode(0x%08lx): %s\n",
|
|
(long) e->e_id, e->e_dn, 0 );
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Retrieve an Entry that was stored using entry_encode above.
|
|
*
|
|
* Note: everything is stored in a single contiguous block, so
|
|
* you can not free individual attributes or names from this
|
|
* structure. Attempting to do so will likely corrupt memory.
|
|
*/
|
|
|
|
int mdb_entry_decode(Operation *op, MDB_val *data, Entry **e)
|
|
{
|
|
struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
|
|
int i, j, nattrs, nvals;
|
|
int rc;
|
|
Attribute *a;
|
|
Entry *x;
|
|
const char *text;
|
|
AttributeDescription *ad;
|
|
unsigned int *lp = (unsigned int *)data->mv_data;
|
|
unsigned char *ptr;
|
|
BerVarray bptr;
|
|
|
|
Debug( LDAP_DEBUG_TRACE,
|
|
"=> mdb_entry_decode:\n",
|
|
0, 0, 0 );
|
|
|
|
nattrs = *lp++;
|
|
nvals = *lp++;
|
|
x = mdb_entry_alloc(op, nattrs, nvals);
|
|
x->e_ocflags = *lp++;
|
|
if (!nvals) {
|
|
goto done;
|
|
}
|
|
a = x->e_attrs;
|
|
bptr = a->a_vals;
|
|
i = *lp++;
|
|
ptr = (unsigned char *)(lp + i);
|
|
|
|
for (;nattrs>0; nattrs--) {
|
|
int have_nval = 0;
|
|
a->a_desc = mdb->mi_ads[*lp++];
|
|
a->a_flags = SLAP_ATTR_DONT_FREE_DATA | SLAP_ATTR_DONT_FREE_VALS;
|
|
a->a_numvals = *lp++;
|
|
if (a->a_numvals & HIGH_BIT) {
|
|
a->a_numvals ^= HIGH_BIT;
|
|
have_nval = 1;
|
|
}
|
|
a->a_vals = bptr;
|
|
for (i=0; i<a->a_numvals; i++) {
|
|
bptr->bv_len = *lp++;;
|
|
bptr->bv_val = (char *)ptr;
|
|
ptr += bptr->bv_len+1;
|
|
bptr++;
|
|
}
|
|
bptr->bv_val = NULL;
|
|
bptr->bv_len = 0;
|
|
bptr++;
|
|
|
|
if (have_nval) {
|
|
a->a_nvals = bptr;
|
|
for (i=0; i<a->a_numvals; i++) {
|
|
bptr->bv_len = *lp++;
|
|
bptr->bv_val = (char *)ptr;
|
|
ptr += bptr->bv_len+1;
|
|
bptr++;
|
|
}
|
|
bptr->bv_val = NULL;
|
|
bptr->bv_len = 0;
|
|
bptr++;
|
|
} else {
|
|
a->a_nvals = a->a_vals;
|
|
}
|
|
/* FIXME: This is redundant once a sorted entry is saved into the DB */
|
|
if ( a->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
|
|
rc = slap_sort_vals( (Modifications *)a, &text, &j, NULL );
|
|
if ( rc == LDAP_SUCCESS ) {
|
|
a->a_flags |= SLAP_ATTR_SORTED_VALS;
|
|
} else if ( rc == LDAP_TYPE_OR_VALUE_EXISTS ) {
|
|
/* should never happen */
|
|
Debug( LDAP_DEBUG_ANY,
|
|
"mdb_entry_decode: attributeType %s value #%d provided more than once\n",
|
|
a->a_desc->ad_cname.bv_val, j, 0 );
|
|
return rc;
|
|
}
|
|
}
|
|
a->a_next = a+1;
|
|
a = a->a_next;
|
|
}
|
|
a[-1].a_next = NULL;
|
|
done:
|
|
|
|
Debug(LDAP_DEBUG_TRACE, "<= mdb_entry_decode\n",
|
|
0, 0, 0 );
|
|
*e = x;
|
|
return 0;
|
|
}
|