1 files changed, 322 insertions, 0 deletions
diff --git a/servers/slapd/back-ndb/delete.cpp b/servers/slapd/back-ndb/delete.cpp
new file mode 100644
index 0000000..46b33f6
--- /dev/null
+++ b/servers/slapd/back-ndb/delete.cpp
@@ -0,0 +1,322 @@
+/* delete.cpp - ndb backend delete routine */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2008-2022 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;
+}