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zt.h
/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef DNS_ZT_H #define DNS_ZT_H 1 /*! \file dns/zt.h */ #include <stdbool.h> #include <isc/lang.h> #include <isc/rwlock.h> #include <dns/types.h> #define DNS_ZTFIND_NOEXACT 0x01 ISC_LANG_BEGINDECLS typedef isc_result_t (*dns_zt_allloaded_t)(void *arg); /*%< * Method prototype: when all pending zone loads are complete, * the zone table can inform the caller via a callback function with * this signature. */ typedef isc_result_t (*dns_zt_zoneloaded_t)(dns_zt_t *zt, dns_zone_t *zone, isc_task_t *task); /*%< * Method prototype: when a zone finishes loading, the zt object * can be informed via a callback function with this signature. */ isc_result_t dns_zt_create(isc_mem_t *mctx, dns_rdataclass_t rdclass, dns_zt_t **zt); /*%< * Creates a new zone table. * * Requires: * \li 'mctx' to be initialized. * * Returns: * \li #ISC_R_SUCCESS on success. * \li #ISC_R_NOMEMORY */ isc_result_t dns_zt_mount(dns_zt_t *zt, dns_zone_t *zone); /*%< * Mounts the zone on the zone table. * * Requires: * \li 'zt' to be valid * \li 'zone' to be valid * * Returns: * \li #ISC_R_SUCCESS * \li #ISC_R_EXISTS * \li #ISC_R_NOSPACE * \li #ISC_R_NOMEMORY */ isc_result_t dns_zt_unmount(dns_zt_t *zt, dns_zone_t *zone); /*%< * Unmount the given zone from the table. * * Requires: * 'zt' to be valid * \li 'zone' to be valid * * Returns: * \li #ISC_R_SUCCESS * \li #ISC_R_NOTFOUND * \li #ISC_R_NOMEMORY */ isc_result_t dns_zt_find(dns_zt_t *zt, const dns_name_t *name, unsigned int options, dns_name_t *foundname, dns_zone_t **zone); /*%< * Find the best match for 'name' in 'zt'. If foundname is non NULL * then the name of the zone found is returned. * * Notes: * \li If the DNS_ZTFIND_NOEXACT is set, the best partial match (if any) * to 'name' will be returned. * * Requires: * \li 'zt' to be valid * \li 'name' to be valid * \li 'foundname' to be initialized and associated with a fixedname or NULL * \li 'zone' to be non NULL and '*zone' to be NULL * * Returns: * \li #ISC_R_SUCCESS * \li #DNS_R_PARTIALMATCH * \li #ISC_R_NOTFOUND * \li #ISC_R_NOSPACE */ void dns_zt_detach(dns_zt_t **ztp); /*%< * Detach the given zonetable, if the reference count goes to zero the * zonetable will be freed. In either case 'ztp' is set to NULL. * * Requires: * \li '*ztp' to be valid */ void dns_zt_flushanddetach(dns_zt_t **ztp); /*%< * Detach the given zonetable, if the reference count goes to zero the * zonetable will be flushed and then freed. In either case 'ztp' is * set to NULL. * * Requires: * \li '*ztp' to be valid */ void dns_zt_attach(dns_zt_t *zt, dns_zt_t **ztp); /*%< * Attach 'zt' to '*ztp'. * * Requires: * \li 'zt' to be valid * \li '*ztp' to be NULL */ isc_result_t dns_zt_load(dns_zt_t *zt, bool stop); isc_result_t dns_zt_loadnew(dns_zt_t *zt, bool stop); isc_result_t dns_zt_asyncload(dns_zt_t *zt, dns_zt_allloaded_t alldone, void *arg); isc_result_t dns_zt_asyncload2(dns_zt_t *zt, dns_zt_allloaded_t alldone, void *arg, bool newonly); /*%< * Load all zones in the table. If 'stop' is true, * stop on the first error and return it. If 'stop' * is false, ignore errors. * * dns_zt_loadnew() only loads zones that are not yet loaded. * dns_zt_load() also loads zones that are already loaded and * and whose master file has changed since the last load. * dns_zt_asyncload() loads zones asynchronously; when all * zones in the zone table have finished loaded (or failed due * to errors), the caller is informed by calling 'alldone' * with an argument of 'arg'. * * Requires: * \li 'zt' to be valid */ isc_result_t dns_zt_freezezones(dns_zt_t *zt, bool freeze); /*%< * Freeze/thaw updates to master zones. * Any pending updates will be flushed. * Zones will be reloaded on thaw. */ isc_result_t dns_zt_apply(dns_zt_t *zt, isc_rwlocktype_t lock, bool stop, isc_result_t (*action)(dns_zone_t *, void *), void *uap); isc_result_t dns_zt_apply2(dns_zt_t *zt, isc_rwlocktype_t lock, bool stop, isc_result_t *sub, isc_result_t (*action)(dns_zone_t *, void *), void *uap); /*%< * Apply a given 'action' to all zone zones in the table. * If 'stop' is 'true' then walking the zone tree will stop if * 'action' does not return ISC_R_SUCCESS. * * Requires: * \li 'zt' to be valid. * \li 'action' to be non NULL. * * Returns: * \li ISC_R_SUCCESS if action was applied to all nodes. If 'stop' is * false and 'sub' is non NULL then the first error (if any) * reported by 'action' is returned in '*sub'; * any error code from 'action'. */ bool dns_zt_loadspending(dns_zt_t *zt); /*%< * Returns true if and only if there are zones still waiting to * be loaded in zone table 'zt'. * * Requires: * \li 'zt' to be valid. */ void dns_zt_setviewcommit(dns_zt_t *zt); /*%< * Commit dns_zone_setview() calls previously made for all zones in this * zone table. * * Requires: *\li 'view' to be valid. */ void dns_zt_setviewrevert(dns_zt_t *zt); /*%< * Revert dns_zone_setview() calls previously made for all zones in this * zone table. * * Requires: *\li 'view' to be valid. */ ISC_LANG_ENDDECLS #endif /* DNS_ZT_H */
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