Adding upstream version 2.5.13+dfsg.upstream/2.5.13+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 419 insertions, 0 deletions

diff --git a/servers/slapd/back-wt/delete.c b/servers/slapd/back-wt/delete.c
new file mode 100644
index 0000000..9673662
--- /dev/null
+++ b/servers/slapd/back-wt/delete.c
@@ -0,0 +1,419 @@
+/* OpenLDAP WiredTiger backend */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2002-2022 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 developed by HAMANO Tsukasa <hamano@osstech.co.jp>
+ * based on back-bdb for inclusion in OpenLDAP Software.
+ * WiredTiger is a product of MongoDB Inc.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "back-wt.h"
+#include "slap-config.h"
+
+int
+wt_delete( Operation *op, SlapReply *rs )
+{
+    struct wt_info *wi = (struct wt_info *) op->o_bd->be_private;
+	struct berval   pdn = {0, NULL};
+	Entry *e = NULL;
+	Entry *p = NULL;
+	int manageDSAit = get_manageDSAit( op );
+	AttributeDescription *children = slap_schema.si_ad_children;
+	AttributeDescription *entry = slap_schema.si_ad_entry;
+
+	LDAPControl **preread_ctrl = NULL;
+	LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
+	int num_ctrls = 0;
+
+	wt_ctx *wc;
+	int rc;
+
+	int parent_is_glue = 0;
+	int parent_is_leaf = 0;
+
+	Debug( LDAP_DEBUG_ARGS, "==> wt_delete: %s\n",
+		   op->o_req_dn.bv_val );
+
+	if( op->o_txnSpec && txn_preop( op, rs ))
+		return rs->sr_err;
+
+	ctrls[num_ctrls] = 0;
+	rs->sr_text = NULL;
+
+	wc = wt_ctx_get(op, wi);
+	if( !wc ){
+        Debug( LDAP_DEBUG_TRACE, "wt_delete: wt_ctx_get failed\n" );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "internal error";
+		goto return_results;
+	}
+
+/* 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_ndn, &pdn );
+	}
+
+	/* get parent */
+	rc = wt_dn2entry(op->o_bd, wc, &pdn, &p);
+	switch( rc ) {
+	case 0:
+	case WT_NOTFOUND:
+		break;
+	default:
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "internal error";
+		Debug( LDAP_DEBUG_ANY,
+			   "wt_delete: error at wt_dn2entry() rc=%d\n", rc );
+		goto return_results;
+	}
+
+	if ( rc == WT_NOTFOUND && pdn.bv_len != 0 ) {
+		Debug( LDAP_DEBUG_ARGS,
+			   "<== wt_delete: parent not found %s\n", op->o_req_dn.bv_val );
+		rc = wt_dn2aentry(op->o_bd, wc, &op->o_req_ndn, &e);
+		Debug( LDAP_DEBUG_ARGS, "<== wt_delete: rc=%d\n", rc );
+
+		switch( rc ) {
+		case 0:
+			break;
+		case WT_NOTFOUND:
+			rs->sr_err = LDAP_NO_SUCH_OBJECT;
+			goto return_results;
+		default:
+			Debug( LDAP_DEBUG_ANY, "wt_delete: wt_dn2aentry failed (%d)\n", rc );
+			rs->sr_err = LDAP_OTHER;
+			rs->sr_text = "internal error";
+			goto return_results;
+		}
+
+		if ( e && !BER_BVISEMPTY( &e->e_name )) {
+			rs->sr_matched = ch_strdup( e->e_name.bv_val );
+			if ( is_entry_referral( e )) {
+				BerVarray ref = get_entry_referrals( op, e );
+				rs->sr_ref = referral_rewrite( ref, &e->e_name,
+											   &op->o_req_dn, LDAP_SCOPE_DEFAULT );
+				ber_bvarray_free( ref );
+			} else {
+				rs->sr_ref = NULL;
+			}
+		} else {
+			rs->sr_ref = referral_rewrite( default_referral, NULL,
+										   &op->o_req_dn, LDAP_SCOPE_DEFAULT );
+		}
+
+		rs->sr_err = LDAP_REFERRAL;
+		rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+		goto return_results;
+	}
+
+	/* get entry */
+	rc = wt_dn2entry(op->o_bd, wc, &op->o_req_ndn, &e);
+	switch( rc ) {
+	case 0:
+		break;
+	case WT_NOTFOUND:
+		break;
+	default:
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "internal error";
+		Debug( LDAP_DEBUG_ANY,
+			   "wt_delete: error at wt_dn2entry() rc=%d\n", rc );
+		goto return_results;
+	}
+
+	/* FIXME : dn2entry() should return non-glue entry */
+	if (rc == WT_NOTFOUND ||
+		( !manageDSAit && e && is_entry_glue( e ) )) {
+		if ( !e ) {
+			Debug( LDAP_DEBUG_ARGS,
+				   "<== wt_delete: no such object %s\n",
+				   op->o_req_dn.bv_val);
+			rc = wt_dn2aentry(op->o_bd, wc, &op->o_req_ndn, &e);
+			switch( rc ) {
+			case 0:
+				break;
+			case WT_NOTFOUND:
+				rs->sr_err = LDAP_NO_SUCH_OBJECT;
+				goto return_results;
+			default:
+				Debug( LDAP_DEBUG_ANY, "wt_delete: wt_dn2aentry failed (%d)\n", rc );
+				rs->sr_err = LDAP_OTHER;
+				rs->sr_text = "internal error";
+				goto return_results;
+			}
+		}
+
+		rs->sr_matched = ch_strdup( e->e_dn );
+		if ( is_entry_referral( e )) {
+			BerVarray ref = get_entry_referrals( op, e );
+			rs->sr_ref = referral_rewrite( ref, &e->e_name,
+										   &op->o_req_dn, LDAP_SCOPE_DEFAULT );
+			ber_bvarray_free( ref );
+		} else {
+			rs->sr_ref = NULL;
+		}
+
+		rs->sr_err = LDAP_REFERRAL;
+		rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+		goto return_results;
+	}
+
+	if ( pdn.bv_len != 0 ) {
+		/* 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,
+				   "<== wt_delete: no write access to parent\n" );
+			rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+			rs->sr_text = "no write access to parent";
+			goto return_results;
+		}
+
+	} else {
+		/* no parent, must be root to delete */
+		if( ! be_isroot( op ) ) {
+			if ( be_issuffix( op->o_bd, (struct berval *)&slap_empty_bv )
+				 || be_shadow_update( op ) ) {
+				p = (Entry *)&slap_entry_root;
+
+				/* check parent for "children" acl */
+				rs->sr_err = access_allowed( op, p,
+											 children, NULL, ACL_WDEL, NULL );
+
+				p = NULL;
+
+				if ( !rs->sr_err  ) {
+					Debug( LDAP_DEBUG_TRACE,
+						   "<== wt_delete: no access to parent\n" );
+					rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+					rs->sr_text = "no write access to parent";
+					goto return_results;
+				}
+
+			} else {
+				Debug( LDAP_DEBUG_TRACE,
+					   "<== wt_delete: no parent and not root\n" );
+				rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+				goto return_results;
+			}
+		}
+	}
+
+	if ( get_assert( op ) &&
+		 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
+	{
+		rs->sr_err = LDAP_ASSERTION_FAILED;
+		goto return_results;
+	}
+
+	rs->sr_err = access_allowed( op, e,
+								 entry, NULL, ACL_WDEL, NULL );
+	if ( !rs->sr_err  ) {
+		Debug( LDAP_DEBUG_TRACE,
+			   "<== wt_delete: no write access to entry\n" );
+		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, "wt_delete: entry is referral\n" );
+
+		rs->sr_err = LDAP_REFERRAL;
+		rs->sr_matched = ch_strdup( e->e_name.bv_val );
+		rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+		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,
+				   "<== wt_delete: pre-read failed!\n" );
+			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 */
+	rc = wt_dn2id_has_children( op, wc, e->e_id );
+	if( rc != WT_NOTFOUND ) {
+		switch( rc ) {
+		case 0:
+			Debug(LDAP_DEBUG_ARGS,
+				  "<== wt_delete: non-leaf %s\n", op->o_req_dn.bv_val );
+			rs->sr_err = LDAP_NOT_ALLOWED_ON_NONLEAF;
+			rs->sr_text = "subordinate objects must be deleted first";
+			break;
+		default:
+			Debug(LDAP_DEBUG_ARGS,
+				  "<== wt_delete: has_children failed: %s (%d)\n",
+				  wiredtiger_strerror(rc), rc );
+			rs->sr_err = LDAP_OTHER;
+			rs->sr_text = "internal error";
+		}
+		goto return_results;
+	}
+
+	/* begin transaction */
+	rc = wc->session->begin_transaction(wc->session, NULL);
+	if( rc ) {
+		Debug( LDAP_DEBUG_TRACE,
+			   "wt_delete: begin_transaction failed: %s (%d)\n",
+			   wiredtiger_strerror(rc), rc );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "begin_transaction failed";
+		goto return_results;
+	}
+
+	/* delete from dn2id */
+	rc = wt_dn2id_delete( op, wc, &op->o_req_ndn);
+	if ( rc ) {
+		Debug(LDAP_DEBUG_TRACE,
+			  "<== wt_delete: dn2id failed: %s (%d)\n",
+			  wiredtiger_strerror(rc), rc );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "dn2id delete failed";
+		wc->session->rollback_transaction(wc->session, NULL);
+		goto return_results;
+	}
+
+	/* delete indices for old attributes */
+	rc = wt_index_entry_del( op, wc, e );
+	if ( rc ) {
+		Debug(LDAP_DEBUG_TRACE,
+			  "<== wt_delete: index delete failed: %s (%d)\n",
+			  wiredtiger_strerror(rc), rc );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "index delete failed";
+		wc->session->rollback_transaction(wc->session, NULL);
+		goto return_results;
+	}
+
+	/* fixup delete CSN */
+	if ( !SLAP_SHADOW( op->o_bd )) {
+		struct berval vals[2];
+
+		assert( !BER_BVISNULL( &op->o_csn ) );
+		vals[0] = op->o_csn;
+		BER_BVZERO( &vals[1] );
+		rs->sr_err = wt_index_values( op, wc, slap_schema.si_ad_entryCSN,
+									  vals, 0, SLAP_INDEX_ADD_OP );
+		if ( rs->sr_err != LDAP_SUCCESS ) {
+			rs->sr_text = "entryCSN index update failed";
+			rs->sr_err = LDAP_OTHER;
+			wc->session->rollback_transaction(wc->session, NULL);
+			goto return_results;
+		}
+	}
+
+	/* delete from id2entry */
+	rc = wt_id2entry_delete( op, wc, e );
+	if ( rc ) {
+		Debug( LDAP_DEBUG_TRACE,
+			   "<== wt_delete: id2entry failed: %s (%d)\n",
+			   wiredtiger_strerror(rc), rc );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "entry delete failed";
+		wc->session->rollback_transaction(wc->session, NULL);
+		goto return_results;
+	}
+
+	if ( pdn.bv_len != 0 ) {
+		// TODO: glue entry
+	}
+
+	rc = wc->session->commit_transaction(wc->session, NULL);
+	if( rc ) {
+		Debug( LDAP_DEBUG_TRACE,
+			   "<== wt_delete: commit_transaction failed: %s (%d)\n",
+			   wiredtiger_strerror(rc), rc );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "commit_transaction failed";
+		goto return_results;
+	}
+
+	Debug( LDAP_DEBUG_TRACE,
+		   "wt_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 ( rs->sr_err == LDAP_SUCCESS && parent_is_glue && parent_is_leaf ) {
+		op->o_delete_glue_parent = 1;
+	}
+
+	if ( p != NULL ) {
+		wt_entry_return( p );
+	}
+
+	/* free entry */
+	if( e != NULL ) {
+		wt_entry_return( e );
+	}
+
+	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 );
+	}
+
+	/* TODO: checkpoint */
+
+	return rs->sr_err;
+}
+
+/*
+ * Local variables:
+ * indent-tabs-mode: t
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */