diff options
Diffstat (limited to 'servers/slapd/back-mdb/delete.c')
| -rw-r--r-- | servers/slapd/back-mdb/delete.c | 479 |
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; +} |