/* $NetBSD: delete.c,v 1.1.1.3.6.1 2019/08/10 06:17:18 martin Exp $ */ /* delete.c - mdb backend delete routine */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 2000-2019 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 * . */ #include __RCSID("$NetBSD: delete.c,v 1.1.1.3.6.1 2019/08/10 06:17:18 martin Exp $"); #include "portable.h" #include #include #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; }