diff options
Diffstat (limited to 'servers/slapd/back-bdb/delete.c')
| -rw-r--r-- | servers/slapd/back-bdb/delete.c | 605 |
1 files changed, 605 insertions, 0 deletions
diff --git a/servers/slapd/back-bdb/delete.c b/servers/slapd/back-bdb/delete.c new file mode 100644 index 0000000..14b34fa --- /dev/null +++ b/servers/slapd/back-bdb/delete.c @@ -0,0 +1,605 @@ +/* delete.c - bdb 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-bdb.h" + +int +bdb_delete( Operation *op, SlapReply *rs ) +{ + struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private; + Entry *matched = NULL; + struct berval pdn = {0, NULL}; + Entry *e = NULL; + Entry *p = NULL; + EntryInfo *ei = NULL, *eip = NULL; + int manageDSAit = get_manageDSAit( op ); + AttributeDescription *children = slap_schema.si_ad_children; + AttributeDescription *entry = slap_schema.si_ad_entry; + DB_TXN *ltid = NULL, *lt2; + struct bdb_op_info opinfo = {{{ 0 }}}; + ID eid; + + DB_LOCK lock, plock; + + int num_retries = 0; + + int rc; + + 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(bdb_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; + + /* 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( 0 ) { +retry: /* transaction retry */ + if( e != NULL ) { + bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e); + e = NULL; + } + if( p != NULL ) { + bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p); + p = NULL; + } + Debug( LDAP_DEBUG_TRACE, + "==> " LDAP_XSTRING(bdb_delete) ": retrying...\n", + 0, 0, 0 ); + rs->sr_err = TXN_ABORT( ltid ); + ltid = NULL; + LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.boi_oe, OpExtra, oe_next ); + opinfo.boi_oe.oe_key = NULL; + op->o_do_not_cache = opinfo.boi_acl_cache; + if( rs->sr_err != 0 ) { + rs->sr_err = LDAP_OTHER; + rs->sr_text = "internal error"; + goto return_results; + } + if ( op->o_abandon ) { + rs->sr_err = SLAPD_ABANDON; + goto return_results; + } + parent_is_glue = 0; + parent_is_leaf = 0; + bdb_trans_backoff( ++num_retries ); + } + + /* begin transaction */ + rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, NULL, <id, + bdb->bi_db_opflags ); + Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_delete) ": txn1 id: %x\n", + ltid->id(ltid), 0, 0 ); + rs->sr_text = NULL; + if( rs->sr_err != 0 ) { + Debug( LDAP_DEBUG_TRACE, + LDAP_XSTRING(bdb_delete) ": txn_begin failed: " + "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 ); + rs->sr_err = LDAP_OTHER; + rs->sr_text = "internal error"; + goto return_results; + } + + opinfo.boi_oe.oe_key = bdb; + opinfo.boi_txn = ltid; + opinfo.boi_err = 0; + opinfo.boi_acl_cache = op->o_do_not_cache; + LDAP_SLIST_INSERT_HEAD( &op->o_extra, &opinfo.boi_oe, oe_next ); + + if ( !be_issuffix( op->o_bd, &op->o_req_ndn ) ) { + dnParent( &op->o_req_ndn, &pdn ); + } + + /* get entry */ + rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei, 1, + &lock ); + + switch( rs->sr_err ) { + case 0: + case DB_NOTFOUND: + break; + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + 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 == 0 ) { + e = ei->bei_e; + eip = ei->bei_parent; + } else { + matched = ei->bei_e; + } + + /* FIXME : dn2entry() should return non-glue entry */ + if ( e == NULL || ( !manageDSAit && is_entry_glue( e ))) { + Debug( LDAP_DEBUG_ARGS, + "<=- " LDAP_XSTRING(bdb_delete) ": no such object %s\n", + op->o_req_dn.bv_val, 0, 0); + + if ( matched != NULL ) { + rs->sr_matched = ch_strdup( matched->e_dn ); + rs->sr_ref = is_entry_referral( matched ) + ? get_entry_referrals( op, matched ) + : NULL; + bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, matched); + matched = 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; + } + + rc = bdb_cache_find_id( op, ltid, eip->bei_id, &eip, 0, &plock ); + switch( rc ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + case 0: + case DB_NOTFOUND: + break; + default: + rs->sr_err = LDAP_OTHER; + rs->sr_text = "internal error"; + goto return_results; + } + if ( eip ) p = eip->bei_e; + + if ( pdn.bv_len != 0 ) { + if( p == NULL || !bvmatch( &pdn, &p->e_nname )) { + Debug( LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_delete) ": parent " + "does not exist\n", 0, 0, 0 ); + rs->sr_err = LDAP_OTHER; + rs->sr_text = "could not locate parent of entry"; + goto return_results; + } + + /* check parent for "children" acl */ + rs->sr_err = access_allowed( op, p, + children, NULL, ACL_WDEL, NULL ); + + if ( !rs->sr_err ) { + switch( opinfo.boi_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + + Debug( LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_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 ) { + switch( opinfo.boi_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + + Debug( LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_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(bdb_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 ) { + switch( opinfo.boi_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + + Debug( LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_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(bdb_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(bdb_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; + } + } + } + + /* nested transaction */ + rs->sr_err = TXN_BEGIN( bdb->bi_dbenv, ltid, <2, + bdb->bi_db_opflags ); + rs->sr_text = NULL; + if( rs->sr_err != 0 ) { + Debug( LDAP_DEBUG_TRACE, + LDAP_XSTRING(bdb_delete) ": txn_begin(2) failed: " + "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 ); + rs->sr_err = LDAP_OTHER; + rs->sr_text = "internal error"; + goto return_results; + } + Debug( LDAP_DEBUG_TRACE, LDAP_XSTRING(bdb_delete) ": txn2 id: %x\n", + lt2->id(lt2), 0, 0 ); + + BDB_LOG_PRINTF( bdb->bi_dbenv, lt2, "slapd Starting delete %s(%d)", + e->e_nname.bv_val, e->e_id ); + + /* Can't do it if we have kids */ + rs->sr_err = bdb_cache_children( op, lt2, e ); + if( rs->sr_err != DB_NOTFOUND ) { + switch( rs->sr_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + case 0: + Debug(LDAP_DEBUG_ARGS, + "<=- " LDAP_XSTRING(bdb_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(bdb_delete) + ": has_children failed: %s (%d)\n", + db_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 = bdb_dn2id_delete( op, lt2, eip, e ); + if ( rs->sr_err != 0 ) { + Debug(LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_delete) ": dn2id failed: " + "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 ); + switch( rs->sr_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + rs->sr_text = "DN index delete failed"; + rs->sr_err = LDAP_OTHER; + goto return_results; + } + + /* delete indices for old attributes */ + rs->sr_err = bdb_index_entry_del( op, lt2, e ); + if ( rs->sr_err != LDAP_SUCCESS ) { + Debug(LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_delete) ": index failed: " + "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 ); + switch( rs->sr_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + 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 = bdb_index_values( op, lt2, slap_schema.si_ad_entryCSN, + vals, 0, SLAP_INDEX_ADD_OP ); + if ( rs->sr_err != LDAP_SUCCESS ) { + switch( rs->sr_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + rs->sr_text = "entryCSN index update failed"; + rs->sr_err = LDAP_OTHER; + goto return_results; + } + } + + /* delete from id2entry */ + rs->sr_err = bdb_id2entry_delete( op->o_bd, lt2, e ); + if ( rs->sr_err != 0 ) { + Debug( LDAP_DEBUG_TRACE, + "<=- " LDAP_XSTRING(bdb_delete) ": id2entry failed: " + "%s (%d)\n", db_strerror(rs->sr_err), rs->sr_err, 0 ); + switch( rs->sr_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + 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 = bdb_cache_children( op, lt2, p ); + if ( rs->sr_err != DB_NOTFOUND ) { + switch( rs->sr_err ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + case 0: + break; + default: + Debug(LDAP_DEBUG_ARGS, + "<=- " LDAP_XSTRING(bdb_delete) + ": has_children failed: %s (%d)\n", + db_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; + } + bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p); + p = NULL; + } + + BDB_LOG_PRINTF( bdb->bi_dbenv, lt2, "slapd Commit1 delete %s(%d)", + e->e_nname.bv_val, e->e_id ); + + if ( TXN_COMMIT( lt2, 0 ) != 0 ) { + rs->sr_err = LDAP_OTHER; + rs->sr_text = "txn_commit(2) failed"; + goto return_results; + } + + eid = e->e_id; + +#if 0 /* Do we want to reclaim deleted IDs? */ + ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex ); + if ( e->e_id == bdb->bi_lastid ) { + bdb_last_id( op->o_bd, ltid ); + } + ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex ); +#endif + + if( op->o_noop ) { + if ( ( rs->sr_err = TXN_ABORT( ltid ) ) != 0 ) { + rs->sr_text = "txn_abort (no-op) failed"; + } else { + rs->sr_err = LDAP_X_NO_OPERATION; + ltid = NULL; + goto return_results; + } + } else { + + BDB_LOG_PRINTF( bdb->bi_dbenv, ltid, "slapd Cache delete %s(%d)", + e->e_nname.bv_val, e->e_id ); + + rc = bdb_cache_delete( bdb, e, ltid, &lock ); + switch( rc ) { + case DB_LOCK_DEADLOCK: + case DB_LOCK_NOTGRANTED: + goto retry; + } + + rs->sr_err = TXN_COMMIT( ltid, 0 ); + } + ltid = NULL; + LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.boi_oe, OpExtra, oe_next ); + opinfo.boi_oe.oe_key = NULL; + + BDB_LOG_PRINTF( bdb->bi_dbenv, NULL, "slapd Committed delete %s(%d)", + e->e_nname.bv_val, e->e_id ); + + if( rs->sr_err != 0 ) { + Debug( LDAP_DEBUG_TRACE, + LDAP_XSTRING(bdb_delete) ": txn_%s failed: %s (%d)\n", + op->o_noop ? "abort (no-op)" : "commit", + db_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(bdb_delete) ": deleted%s id=%08lx dn=\"%s\"\n", + op->o_noop ? " (no-op)" : "", + eid, 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 ) + bdb_unlocked_cache_return_entry_r(&bdb->bi_cache, p); + + /* free entry */ + if( e != NULL ) { + if ( rs->sr_err == LDAP_SUCCESS ) { + /* Free the EntryInfo and the Entry */ + bdb_cache_entryinfo_lock( BEI(e) ); + bdb_cache_delete_cleanup( &bdb->bi_cache, BEI(e) ); + } else { + bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, e); + } + } + + if( ltid != NULL ) { + TXN_ABORT( ltid ); + } + if ( opinfo.boi_oe.oe_key ) { + LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.boi_oe, OpExtra, oe_next ); + } + + 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( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp_kbyte ) { + TXN_CHECKPOINT( bdb->bi_dbenv, + bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 ); + } + return rs->sr_err; +} |