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/* delete.cpp - ndb backend delete routine */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2008-2021 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by Howard Chu for inclusion
* in OpenLDAP Software. This work was sponsored by MySQL.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include "lutil.h"
#include "back-ndb.h"
static struct berval glue_bv = BER_BVC("glue");
int
ndb_back_delete( Operation *op, SlapReply *rs )
{
struct ndb_info *ni = (struct ndb_info *) op->o_bd->be_private;
Entry e = {0};
Entry p = {0};
int manageDSAit = get_manageDSAit( op );
AttributeDescription *children = slap_schema.si_ad_children;
AttributeDescription *entry = slap_schema.si_ad_entry;
NdbArgs NA;
NdbRdns rdns;
struct berval matched;
int num_retries = 0;
int rc;
LDAPControl **preread_ctrl = NULL;
LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
int num_ctrls = 0;
Debug( LDAP_DEBUG_ARGS, "==> " LDAP_XSTRING(ndb_back_delete) ": %s\n",
op->o_req_dn.bv_val, 0, 0 );
ctrls[num_ctrls] = 0;
/* allocate CSN */
if ( BER_BVISNULL( &op->o_csn ) ) {
struct berval csn;
char csnbuf[LDAP_PVT_CSNSTR_BUFSIZE];
csn.bv_val = csnbuf;
csn.bv_len = sizeof(csnbuf);
slap_get_csn( op, &csn, 1 );
}
if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
dnParent( &op->o_req_dn, &p.e_name );
dnParent( &op->o_req_ndn, &p.e_nname );
}
/* Get our NDB handle */
rs->sr_err = ndb_thread_handle( op, &NA.ndb );
rdns.nr_num = 0;
NA.rdns = &rdns;
NA.ocs = NULL;
NA.e = &e;
e.e_name = op->o_req_dn;
e.e_nname = op->o_req_ndn;
if( 0 ) {
retry: /* transaction retry */
NA.txn->close();
NA.txn = NULL;
Debug( LDAP_DEBUG_TRACE,
"==> " LDAP_XSTRING(ndb_back_delete) ": retrying...\n",
0, 0, 0 );
if ( op->o_abandon ) {
rs->sr_err = SLAPD_ABANDON;
goto return_results;
}
if ( NA.ocs ) {
ber_bvarray_free( NA.ocs );
NA.ocs = NULL;
}
ndb_trans_backoff( ++num_retries );
}
/* begin transaction */
NA.txn = NA.ndb->startTransaction();
rs->sr_text = NULL;
if( !NA.txn ) {
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(ndb_back_delete) ": startTransaction failed: %s (%d)\n",
NA.ndb->getNdbError().message, NA.ndb->getNdbError().code, 0 );
rs->sr_err = LDAP_OTHER;
rs->sr_text = "internal error";
goto return_results;
}
/* get entry */
rs->sr_err = ndb_entry_get_info( op, &NA, 1, &matched );
switch( rs->sr_err ) {
case 0:
case LDAP_NO_SUCH_OBJECT:
break;
#if 0
case DB_LOCK_DEADLOCK:
case DB_LOCK_NOTGRANTED:
goto retry;
#endif
case LDAP_BUSY:
rs->sr_text = "ldap server busy";
goto return_results;
default:
rs->sr_err = LDAP_OTHER;
rs->sr_text = "internal error";
goto return_results;
}
if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ||
( !manageDSAit && bvmatch( NA.ocs, &glue_bv ))) {
Debug( LDAP_DEBUG_ARGS,
"<=- " LDAP_XSTRING(ndb_back_delete) ": no such object %s\n",
op->o_req_dn.bv_val, 0, 0);
if ( rs->sr_err == LDAP_NO_SUCH_OBJECT ) {
rs->sr_matched = matched.bv_val;
if ( NA.ocs )
ndb_check_referral( op, rs, &NA );
} else {
rs->sr_matched = p.e_name.bv_val;
rs->sr_err = LDAP_NO_SUCH_OBJECT;
}
goto return_results;
}
/* check parent for "children" acl */
rs->sr_err = access_allowed( op, &p,
children, NULL, ACL_WDEL, NULL );
if ( !rs->sr_err ) {
Debug( LDAP_DEBUG_TRACE,
"<=- " LDAP_XSTRING(ndb_back_delete) ": no write "
"access to parent\n", 0, 0, 0 );
rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
rs->sr_text = "no write access to parent";
goto return_results;
}
rs->sr_err = ndb_entry_get_data( op, &NA, 1 );
rs->sr_err = access_allowed( op, &e,
entry, NULL, ACL_WDEL, NULL );
if ( !rs->sr_err ) {
Debug( LDAP_DEBUG_TRACE,
"<=- " LDAP_XSTRING(ndb_back_delete) ": no write access "
"to entry\n", 0, 0, 0 );
rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
rs->sr_text = "no write access to entry";
goto return_results;
}
if ( !manageDSAit && is_entry_referral( &e ) ) {
/* entry is a referral, don't allow delete */
rs->sr_ref = get_entry_referrals( op, &e );
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(ndb_back_delete) ": entry is referral\n",
0, 0, 0 );
rs->sr_err = LDAP_REFERRAL;
rs->sr_matched = e.e_name.bv_val;
rs->sr_flags = REP_REF_MUSTBEFREED;
goto return_results;
}
if ( get_assert( op ) &&
( test_filter( op, &e, (Filter *)get_assertion( op )) != LDAP_COMPARE_TRUE ))
{
rs->sr_err = LDAP_ASSERTION_FAILED;
goto return_results;
}
/* pre-read */
if( op->o_preread ) {
if( preread_ctrl == NULL ) {
preread_ctrl = &ctrls[num_ctrls++];
ctrls[num_ctrls] = NULL;
}
if( slap_read_controls( op, rs, &e,
&slap_pre_read_bv, preread_ctrl ) )
{
Debug( LDAP_DEBUG_TRACE,
"<=- " LDAP_XSTRING(ndb_back_delete) ": pre-read "
"failed!\n", 0, 0, 0 );
if ( op->o_preread & SLAP_CONTROL_CRITICAL ) {
/* FIXME: is it correct to abort
* operation if control fails? */
goto return_results;
}
}
}
/* Can't do it if we have kids */
rs->sr_err = ndb_has_children( &NA, &rc );
if ( rs->sr_err ) {
Debug(LDAP_DEBUG_ARGS,
"<=- " LDAP_XSTRING(ndb_back_delete)
": has_children failed: %s (%d)\n",
NA.txn->getNdbError().message, NA.txn->getNdbError().code, 0 );
rs->sr_err = LDAP_OTHER;
rs->sr_text = "internal error";
goto return_results;
}
if ( rc == LDAP_COMPARE_TRUE ) {
Debug(LDAP_DEBUG_ARGS,
"<=- " LDAP_XSTRING(ndb_back_delete)
": non-leaf %s\n",
op->o_req_dn.bv_val, 0, 0);
rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
rs->sr_text = "subordinate objects must be deleted first";
goto return_results;
}
/* delete info */
rs->sr_err = ndb_entry_del_info( op->o_bd, &NA );
if ( rs->sr_err != 0 ) {
Debug(LDAP_DEBUG_TRACE,
"<=- " LDAP_XSTRING(ndb_back_delete) ": del_info failed: %s (%d)\n",
NA.txn->getNdbError().message, NA.txn->getNdbError().code, 0 );
rs->sr_text = "DN index delete failed";
rs->sr_err = LDAP_OTHER;
goto return_results;
}
/* delete data */
rs->sr_err = ndb_entry_del_data( op->o_bd, &NA );
if ( rs->sr_err != 0 ) {
Debug( LDAP_DEBUG_TRACE,
"<=- " LDAP_XSTRING(ndb_back_delete) ": del_data failed: %s (%d)\n",
NA.txn->getNdbError().message, NA.txn->getNdbError().code, 0 );
rs->sr_text = "entry delete failed";
rs->sr_err = LDAP_OTHER;
goto return_results;
}
if( op->o_noop ) {
if (( rs->sr_err=NA.txn->execute( NdbTransaction::Rollback,
NdbOperation::AbortOnError, 1 )) != 0 ) {
rs->sr_text = "txn (no-op) failed";
} else {
rs->sr_err = LDAP_X_NO_OPERATION;
}
} else {
if (( rs->sr_err=NA.txn->execute( NdbTransaction::Commit,
NdbOperation::AbortOnError, 1 )) != 0 ) {
rs->sr_text = "txn_commit failed";
} else {
rs->sr_err = LDAP_SUCCESS;
}
}
if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_X_NO_OPERATION ) {
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(ndb_back_delete) ": txn_%s failed: %s (%d)\n",
op->o_noop ? "abort (no-op)" : "commit",
NA.txn->getNdbError().message, NA.txn->getNdbError().code );
rs->sr_err = LDAP_OTHER;
rs->sr_text = "commit failed";
goto return_results;
}
NA.txn->close();
NA.txn = NULL;
Debug( LDAP_DEBUG_TRACE,
LDAP_XSTRING(ndb_back_delete) ": deleted%s id=%08lx dn=\"%s\"\n",
op->o_noop ? " (no-op)" : "",
e.e_id, op->o_req_dn.bv_val );
rs->sr_err = LDAP_SUCCESS;
rs->sr_text = NULL;
if( num_ctrls ) rs->sr_ctrls = ctrls;
return_results:
if ( NA.ocs ) {
ber_bvarray_free_x( NA.ocs, op->o_tmpmemctx );
NA.ocs = NULL;
}
/* free entry */
if( e.e_attrs != NULL ) {
attrs_free( e.e_attrs );
e.e_attrs = NULL;
}
if( NA.txn != NULL ) {
NA.txn->execute( Rollback );
NA.txn->close();
}
send_ldap_result( op, rs );
slap_graduate_commit_csn( op );
if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
}
return rs->sr_err;
}
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