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acl.h
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adb.h
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byaddr.h
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cache.h
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callbacks.h
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cert.h
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compress.h
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db.h
(40.33 KB)
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dbiterator.h
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dbtable.h
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diff.h
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dispatch.h
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dlz.h
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dnssec.h
(10.84 KB)
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ds.h
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dynamic_db.h
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enumclass.h
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enumtype.h
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events.h
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fixedname.h
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forward.h
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iptable.h
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journal.h
(8.27 KB)
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keyflags.h
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keytable.h
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keyvalues.h
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lib.h
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log.h
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master.h
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masterdump.h
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message.h
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name.h
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ncache.h
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nsec.h
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peer.h
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portlist.h
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private.h
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rbt.h
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rcode.h
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rdata.h
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rdataclass.h
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rdatalist.h
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rdataset.h
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rdatasetiter.h
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rdataslab.h
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rdatastruct.h
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rdatatype.h
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request.h
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resolver.h
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result.h
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rootns.h
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rpz.h
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rrl.h
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sdb.h
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sdlz.h
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secalg.h
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secproto.h
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soa.h
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ssu.h
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tcpmsg.h
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time.h
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tkey.h
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tsig.h
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ttl.h
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types.h
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validator.h
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version.h
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view.h
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xfrin.h
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zone.h
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zonekey.h
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zt.h
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Editing: journal.h
/* * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1999-2001 Internet Software Consortium. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* $Id: journal.h,v 1.37 2009-11-04 23:48:18 tbox Exp $ */ #ifndef DNS_JOURNAL_H #define DNS_JOURNAL_H 1 /***** ***** Module Info *****/ /*! \file dns/journal.h * \brief * Database journaling. */ /*** *** Imports ***/ #include <isc/lang.h> #include <isc/magic.h> #include <dns/name.h> #include <dns/diff.h> #include <dns/rdata.h> #include <dns/types.h> /*** *** Defines. ***/ #define DNS_JOURNALOPT_RESIGN 0x00000001 /*** *** Types ***/ /*% * A dns_journal_t represents an open journal file. This is an opaque type. * * A particular dns_journal_t object may be opened for writing, in which case * it can be used for writing transactions to a journal file, or it can be * opened for reading, in which case it can be used for reading transactions * from (iterating over) a journal file. A single dns_journal_t object may * not be used for both purposes. */ typedef struct dns_journal dns_journal_t; /*** *** Functions ***/ ISC_LANG_BEGINDECLS /**************************************************************************/ isc_result_t dns_db_createsoatuple(dns_db_t *db, dns_dbversion_t *ver, isc_mem_t *mctx, dns_diffop_t op, dns_difftuple_t **tp); /*!< brief * Create a diff tuple for the current database SOA. * XXX this probably belongs somewhere else. */ /*@{*/ #define DNS_SERIAL_GT(a, b) ((int)(((a) - (b)) & 0xFFFFFFFF) > 0) #define DNS_SERIAL_GE(a, b) ((int)(((a) - (b)) & 0xFFFFFFFF) >= 0) /*!< brief * Compare SOA serial numbers. DNS_SERIAL_GT(a, b) returns true iff * a is "greater than" b where "greater than" is as defined in RFC1982. * DNS_SERIAL_GE(a, b) returns true iff a is "greater than or equal to" b. */ /*@}*/ /**************************************************************************/ /* * Journal object creation and destruction. */ isc_result_t dns_journal_open(isc_mem_t *mctx, const char *filename, isc_boolean_t write, dns_journal_t **journalp); /*%< * Open the journal file 'filename' and create a dns_journal_t object for it. * * If 'write' is ISC_TRUE, the journal is open for writing. If it does * not exist, it is created. * * If 'write' is ISC_FALSE, the journal is open for reading. If it does * not exist, ISC_R_NOTFOUND is returned. */ void dns_journal_destroy(dns_journal_t **journalp); /*%< * Destroy a dns_journal_t, closing any open files and freeing its memory. */ /**************************************************************************/ /* * Writing transactions to journals. */ isc_result_t dns_journal_begin_transaction(dns_journal_t *j); /*%< * Prepare to write a new transaction to the open journal file 'j'. * * Requires: * \li 'j' is open for writing. */ isc_result_t dns_journal_writediff(dns_journal_t *j, dns_diff_t *diff); /*%< * Write 'diff' to the current transaction of journal file 'j'. * * Requires: * \li 'j' is open for writing and dns_journal_begin_transaction() * has been called. * *\li 'diff' is a full or partial, correctly ordered IXFR * difference sequence. */ isc_result_t dns_journal_commit(dns_journal_t *j); /*%< * Commit the current transaction of journal file 'j'. * * Requires: * \li 'j' is open for writing and dns_journal_begin_transaction() * has been called. * * \li dns_journal_writediff() has been called one or more times * to form a complete, correctly ordered IXFR difference * sequence. */ isc_result_t dns_journal_write_transaction(dns_journal_t *j, dns_diff_t *diff); /*% * Write a complete transaction at once to a journal file, * sorting it if necessary, and commit it. Equivalent to calling * dns_diff_sort(), dns_journal_begin_transaction(), * dns_journal_writediff(), and dns_journal_commit(). * * Requires: *\li 'j' is open for writing. * * \li 'diff' contains exactly one SOA deletion, one SOA addition * with a greater serial number, and possibly other changes, * in arbitrary order. */ /**************************************************************************/ /* * Reading transactions from journals. */ isc_uint32_t dns_journal_first_serial(dns_journal_t *j); isc_uint32_t dns_journal_last_serial(dns_journal_t *j); /*%< * Get the first and last addressable serial number in the journal. */ isc_result_t dns_journal_iter_init(dns_journal_t *j, isc_uint32_t begin_serial, isc_uint32_t end_serial); /*%< * Prepare to iterate over the transactions that will bring the database * from SOA serial number 'begin_serial' to 'end_serial'. * * Returns: *\li ISC_R_SUCCESS *\li ISC_R_RANGE begin_serial is outside the addressable range. *\li ISC_R_NOTFOUND begin_serial is within the range of addressable * serial numbers covered by the journal, but * this particular serial number does not exist. */ /*@{*/ isc_result_t dns_journal_first_rr(dns_journal_t *j); isc_result_t dns_journal_next_rr(dns_journal_t *j); /*%< * Position the iterator at the first/next RR in a journal * transaction sequence established using dns_journal_iter_init(). * * Requires: * \li dns_journal_iter_init() has been called. * */ /*@}*/ void dns_journal_current_rr(dns_journal_t *j, dns_name_t **name, isc_uint32_t *ttl, dns_rdata_t **rdata); /*%< * Get the name, ttl, and rdata of the current journal RR. * * Requires: * \li The last call to dns_journal_first_rr() or dns_journal_next_rr() * returned ISC_R_SUCCESS. */ /**************************************************************************/ /* * Database roll-forward. */ isc_result_t dns_journal_rollforward(isc_mem_t *mctx, dns_db_t *db, unsigned int options, const char *filename); isc_result_t dns_journal_rollforward2(isc_mem_t *mctx, dns_db_t *db, unsigned int options, isc_uint32_t resign, const char *filename); /*%< * Roll forward (play back) the journal file "filename" into the * database "db". This should be called when the server starts * after a shutdown or crash. 'resign' is how many seconds before * a RRSIG is due to expire it should be scheduled to be regenerated. * * Requires: *\li dns_journal_rollforward() requires that DNS_JOURNALOPT_RESIGN * is not set. *\li 'mctx' is a valid memory context. *\li 'db' is a valid database which does not have a version * open for writing. *\li 'filename' is the name of the journal file belonging to 'db'. * * Returns: *\li DNS_R_NOJOURNAL when journal does not exist. *\li ISC_R_NOTFOUND when current serial in not in journal. *\li ISC_R_RANGE when current serial in not in journals range. *\li ISC_R_SUCCESS journal has been applied successfully to database. * others */ isc_result_t dns_journal_print(isc_mem_t *mctx, const char *filename, FILE *file); /* For debugging not general use */ isc_result_t dns_db_diff(isc_mem_t *mctx, dns_db_t *dba, dns_dbversion_t *dbvera, dns_db_t *dbb, dns_dbversion_t *dbverb, const char *journal_filename); /*%< * Compare the databases 'dba' and 'dbb' and generate a journal * entry containing the changes to make 'dba' from 'dbb' (note * the order). This journal entry will consist of a single, * possibly very large transaction. Append the journal * entry to the journal file specified by 'journal_filename'. */ isc_result_t dns_journal_compact(isc_mem_t *mctx, char *filename, isc_uint32_t serial, isc_uint32_t target_size); /*%< * Attempt to compact the journal if it is greater that 'target_size'. * Changes from 'serial' onwards will be preserved. If the journal * exists and is non-empty 'serial' must exist in the journal. */ ISC_LANG_ENDDECLS #endif /* DNS_JOURNAL_H */
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