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-rw-r--r--servers/slapd/back-mdb/delete.c479
1 files changed, 479 insertions, 0 deletions
diff --git a/servers/slapd/back-mdb/delete.c b/servers/slapd/back-mdb/delete.c
new file mode 100644
index 0000000..5d3a574
--- /dev/null
+++ b/servers/slapd/back-mdb/delete.c
@@ -0,0 +1,479 @@
+/* delete.c - mdb backend delete routine */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2021 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>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "lutil.h"
+#include "back-mdb.h"
+
+int
+mdb_delete( Operation *op, SlapReply *rs )
+{
+ struct mdb_info *mdb = (struct mdb_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;
+ MDB_txn *txn = NULL;
+ MDB_cursor *mc;
+ mdb_op_info opinfo = {{{ 0 }}}, *moi = &opinfo;
+
+ LDAPControl **preread_ctrl = NULL;
+ LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
+ int num_ctrls = 0;
+
+ int parent_is_glue = 0;
+ int parent_is_leaf = 0;
+
+#ifdef LDAP_X_TXN
+ int settle = 0;
+#endif
+
+ Debug( LDAP_DEBUG_ARGS, "==> " LDAP_XSTRING(mdb_delete) ": %s\n",
+ op->o_req_dn.bv_val, 0, 0 );
+
+#ifdef LDAP_X_TXN
+ if( op->o_txnSpec ) {
+ /* acquire connection lock */
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+ if( op->o_conn->c_txn == CONN_TXN_INACTIVE ) {
+ rs->sr_text = "invalid transaction identifier";
+ rs->sr_err = LDAP_X_TXN_ID_INVALID;
+ goto txnReturn;
+ } else if( op->o_conn->c_txn == CONN_TXN_SETTLE ) {
+ settle=1;
+ goto txnReturn;
+ }
+
+ if( op->o_conn->c_txn_backend == NULL ) {
+ op->o_conn->c_txn_backend = op->o_bd;
+
+ } else if( op->o_conn->c_txn_backend != op->o_bd ) {
+ rs->sr_text = "transaction cannot span multiple database contexts";
+ rs->sr_err = LDAP_AFFECTS_MULTIPLE_DSAS;
+ goto txnReturn;
+ }
+
+ /* insert operation into transaction */
+
+ rs->sr_text = "transaction specified";
+ rs->sr_err = LDAP_X_TXN_SPECIFY_OKAY;
+
+txnReturn:
+ /* release connection lock */
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+
+ if( !settle ) {
+ send_ldap_result( op, rs );
+ return rs->sr_err;
+ }
+ }
+#endif
+
+ ctrls[num_ctrls] = 0;
+
+ /* begin transaction */
+ rs->sr_err = mdb_opinfo_get( op, mdb, 0, &moi );
+ rs->sr_text = NULL;
+ if( rs->sr_err != 0 ) {
+ Debug( LDAP_DEBUG_TRACE,
+ LDAP_XSTRING(mdb_delete) ": txn_begin failed: "
+ "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "internal error";
+ goto return_results;
+ }
+ txn = moi->moi_txn;
+
+ /* 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 );
+ }
+
+ rs->sr_err = mdb_cursor_open( txn, mdb->mi_dn2id, &mc );
+ if ( rs->sr_err ) {
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "internal error";
+ goto return_results;
+ }
+ /* get parent */
+ rs->sr_err = mdb_dn2entry( op, txn, mc, &pdn, &p, NULL, 1 );
+ switch( rs->sr_err ) {
+ case 0:
+ case MDB_NOTFOUND:
+ break;
+ 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 == MDB_NOTFOUND ) {
+ Debug( LDAP_DEBUG_ARGS,
+ "<=- " LDAP_XSTRING(mdb_delete) ": no such object %s\n",
+ op->o_req_dn.bv_val, 0, 0);
+
+ if ( p && !BER_BVISEMPTY( &p->e_name )) {
+ rs->sr_matched = ch_strdup( p->e_name.bv_val );
+ if ( is_entry_referral( p )) {
+ BerVarray ref = get_entry_referrals( op, p );
+ rs->sr_ref = referral_rewrite( ref, &p->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 );
+ }
+ if ( p ) {
+ mdb_entry_return( op, p );
+ p = NULL;
+ }
+
+ rs->sr_err = LDAP_REFERRAL;
+ rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+ goto return_results;
+ }
+
+ /* get entry */
+ rs->sr_err = mdb_dn2entry( op, txn, mc, &op->o_req_ndn, &e, NULL, 0 );
+ switch( rs->sr_err ) {
+ case MDB_NOTFOUND:
+ e = p;
+ p = NULL;
+ case 0:
+ break;
+ 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;
+ }
+
+ /* FIXME : dn2entry() should return non-glue entry */
+ if ( rs->sr_err == MDB_NOTFOUND || ( !manageDSAit && is_entry_glue( e ))) {
+ Debug( LDAP_DEBUG_ARGS,
+ "<=- " LDAP_XSTRING(mdb_delete) ": no such object %s\n",
+ op->o_req_dn.bv_val, 0, 0);
+
+ 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;
+ }
+ mdb_entry_return( op, e );
+ e = 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,
+ "<=- " LDAP_XSTRING(mdb_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;
+ }
+
+ } 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,
+ "<=- " LDAP_XSTRING(mdb_delete)
+ ": no access to parent\n",
+ 0, 0, 0 );
+ rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+ rs->sr_text = "no write access to parent";
+ goto return_results;
+ }
+
+ } else {
+ Debug( LDAP_DEBUG_TRACE,
+ "<=- " LDAP_XSTRING(mdb_delete)
+ ": no parent and not root\n", 0, 0, 0 );
+ 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,
+ "<=- " LDAP_XSTRING(mdb_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(mdb_delete) ": entry is referral\n",
+ 0, 0, 0 );
+
+ 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,
+ "<=- " LDAP_XSTRING(mdb_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;
+ }
+ }
+ }
+
+ rs->sr_text = NULL;
+
+ /* Can't do it if we have kids */
+ rs->sr_err = mdb_dn2id_children( op, txn, e );
+ if( rs->sr_err != MDB_NOTFOUND ) {
+ switch( rs->sr_err ) {
+ case 0:
+ Debug(LDAP_DEBUG_ARGS,
+ "<=- " LDAP_XSTRING(mdb_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";
+ break;
+ default:
+ Debug(LDAP_DEBUG_ARGS,
+ "<=- " LDAP_XSTRING(mdb_delete)
+ ": has_children failed: %s (%d)\n",
+ mdb_strerror(rs->sr_err), rs->sr_err, 0 );
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "internal error";
+ }
+ goto return_results;
+ }
+
+ /* delete from dn2id */
+ rs->sr_err = mdb_dn2id_delete( op, mc, e->e_id, 1 );
+ mdb_cursor_close( mc );
+ if ( rs->sr_err != 0 ) {
+ Debug(LDAP_DEBUG_TRACE,
+ "<=- " LDAP_XSTRING(mdb_delete) ": dn2id failed: "
+ "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
+ rs->sr_text = "DN index delete failed";
+ rs->sr_err = LDAP_OTHER;
+ goto return_results;
+ }
+
+ /* delete indices for old attributes */
+ rs->sr_err = mdb_index_entry_del( op, txn, e );
+ if ( rs->sr_err != LDAP_SUCCESS ) {
+ Debug(LDAP_DEBUG_TRACE,
+ "<=- " LDAP_XSTRING(mdb_delete) ": index failed: "
+ "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
+ rs->sr_text = "entry index delete failed";
+ rs->sr_err = LDAP_OTHER;
+ 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 = mdb_index_values( op, txn, 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;
+ goto return_results;
+ }
+ }
+
+ /* delete from id2entry */
+ rs->sr_err = mdb_id2entry_delete( op->o_bd, txn, e );
+ if ( rs->sr_err != 0 ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "<=- " LDAP_XSTRING(mdb_delete) ": id2entry failed: "
+ "%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err, 0 );
+ rs->sr_text = "entry delete failed";
+ rs->sr_err = LDAP_OTHER;
+ goto return_results;
+ }
+
+ if ( pdn.bv_len != 0 ) {
+ parent_is_glue = is_entry_glue(p);
+ rs->sr_err = mdb_dn2id_children( op, txn, p );
+ if ( rs->sr_err != MDB_NOTFOUND ) {
+ switch( rs->sr_err ) {
+ case 0:
+ break;
+ default:
+ Debug(LDAP_DEBUG_ARGS,
+ "<=- " LDAP_XSTRING(mdb_delete)
+ ": has_children failed: %s (%d)\n",
+ mdb_strerror(rs->sr_err), rs->sr_err, 0 );
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "internal error";
+ goto return_results;
+ }
+ parent_is_leaf = 1;
+ }
+ mdb_entry_return( op, p );
+ p = NULL;
+ }
+
+ if( moi == &opinfo ) {
+ LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
+ opinfo.moi_oe.oe_key = NULL;
+ if( op->o_noop ) {
+ mdb_txn_abort( txn );
+ rs->sr_err = LDAP_X_NO_OPERATION;
+ txn = NULL;
+ goto return_results;
+ } else {
+ rs->sr_err = mdb_txn_commit( txn );
+ }
+ txn = NULL;
+ }
+
+ if( rs->sr_err != 0 ) {
+ Debug( LDAP_DEBUG_ANY,
+ LDAP_XSTRING(mdb_delete) ": txn_%s failed: %s (%d)\n",
+ op->o_noop ? "abort (no-op)" : "commit",
+ mdb_strerror(rs->sr_err), rs->sr_err );
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "commit failed";
+
+ goto return_results;
+ }
+
+ Debug( LDAP_DEBUG_TRACE,
+ LDAP_XSTRING(mdb_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 ) {
+ mdb_entry_return( op, p );
+ }
+
+ /* free entry */
+ if( e != NULL ) {
+ mdb_entry_return( op, e );
+ }
+
+ if( moi == &opinfo ) {
+ if( txn != NULL ) {
+ mdb_txn_abort( txn );
+ }
+ if ( opinfo.moi_oe.oe_key ) {
+ LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
+ }
+ } else {
+ moi->moi_ref--;
+ }
+
+ 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 );
+ }
+
+#if 0
+ if( rs->sr_err == LDAP_SUCCESS && mdb->bi_txn_cp_kbyte ) {
+ TXN_CHECKPOINT( mdb->bi_dbenv,
+ mdb->bi_txn_cp_kbyte, mdb->bi_txn_cp_min, 0 );
+ }
+#endif
+ return rs->sr_err;
+}