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authorCVS to git conversion script <webmaster@postgresql.org>2002-06-20 20:29:55 +0000
committerCVS to git conversion script <webmaster@postgresql.org>2002-06-20 20:29:55 +0000
commit05dedace84ef8c93fea5309c3ac55f889011429b (patch)
tree4c7f513afbbc03060039a165d1770e11be711773 /src/backend/access/transam/xlog.c
parentd84fe82230c593f3dc5d7f427849b99d1efa8a0a (diff)
This commit was manufactured by cvs2git to create branch 'ecpg_big_bison'.
Sprout from master 2002-06-20 20:29:54 UTC Bruce Momjian <bruce@momjian.us> 'Update copyright to 2002.' 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src/include/storage/buf.h src/include/storage/buf_internals.h src/include/storage/buffile.h src/include/storage/bufmgr.h src/include/storage/bufpage.h src/include/storage/fd.h src/include/storage/freespace.h src/include/storage/ipc.h src/include/storage/item.h src/include/storage/itemid.h src/include/storage/itempos.h src/include/storage/itemptr.h src/include/storage/large_object.h src/include/storage/lmgr.h src/include/storage/lock.h src/include/storage/lwlock.h src/include/storage/off.h src/include/storage/page.h src/include/storage/pg_sema.h src/include/storage/pg_shmem.h src/include/storage/pmsignal.h src/include/storage/pos.h src/include/storage/proc.h src/include/storage/relfilenode.h src/include/storage/s_lock.h src/include/storage/shmem.h src/include/storage/sinval.h src/include/storage/sinvaladt.h src/include/storage/smgr.h src/include/storage/spin.h src/include/strdup.h src/include/tcop/dest.h src/include/tcop/fastpath.h src/include/tcop/pquery.h src/include/tcop/tcopdebug.h src/include/tcop/tcopprot.h src/include/tcop/utility.h src/include/utils/acl.h src/include/utils/array.h src/include/utils/ascii.h src/include/utils/bit.h src/include/utils/builtins.h src/include/utils/cash.h src/include/utils/catcache.h src/include/utils/date.h src/include/utils/datetime.h src/include/utils/datum.h src/include/utils/dynahash.h src/include/utils/dynamic_loader.h src/include/utils/elog.h src/include/utils/exc.h src/include/utils/excid.h src/include/utils/fcache.h src/include/utils/fmgrtab.h src/include/utils/formatting.h src/include/utils/geo_decls.h src/include/utils/guc.h src/include/utils/hsearch.h src/include/utils/inet.h src/include/utils/int8.h src/include/utils/inval.h src/include/utils/logtape.h src/include/utils/lsyscache.h src/include/utils/memutils.h src/include/utils/nabstime.h src/include/utils/numeric.h src/include/utils/palloc.h src/include/utils/pg_crc.h src/include/utils/pg_locale.h src/include/utils/pg_lzcompress.h src/include/utils/portal.h src/include/utils/ps_status.h src/include/utils/rel.h src/include/utils/relcache.h src/include/utils/selfuncs.h src/include/utils/sets.h src/include/utils/syscache.h src/include/utils/timestamp.h src/include/utils/tqual.h src/include/utils/tuplesort.h src/include/utils/tuplestore.h src/include/utils/varbit.h src/interfaces/Makefile src/interfaces/cli/example1.c src/interfaces/cli/example2.c src/interfaces/cli/sqlcli.h src/interfaces/jdbc/CHANGELOG src/interfaces/jdbc/Implementation src/interfaces/jdbc/Makefile src/interfaces/jdbc/README src/interfaces/jdbc/build.xml src/interfaces/jdbc/example/ImageViewer.java src/interfaces/jdbc/example/Unicode.java src/interfaces/jdbc/example/basic.java src/interfaces/jdbc/example/blobtest.java src/interfaces/jdbc/example/corba/StockClient.java src/interfaces/jdbc/example/corba/StockDB.java src/interfaces/jdbc/example/corba/StockDispenserImpl.java src/interfaces/jdbc/example/corba/StockItemImpl.java src/interfaces/jdbc/example/corba/StockServer.java src/interfaces/jdbc/example/corba/readme src/interfaces/jdbc/example/corba/stock.idl src/interfaces/jdbc/example/corba/stock.sql src/interfaces/jdbc/example/datestyle.java src/interfaces/jdbc/example/metadata.java src/interfaces/jdbc/example/psql.java src/interfaces/jdbc/example/threadsafe.java src/interfaces/jdbc/jdbc.jpx src/interfaces/jdbc/org/postgresql/Connection.java src/interfaces/jdbc/org/postgresql/Driver.java.in src/interfaces/jdbc/org/postgresql/Field.java src/interfaces/jdbc/org/postgresql/PG_Stream.java src/interfaces/jdbc/org/postgresql/PostgresqlDataSource.java src/interfaces/jdbc/org/postgresql/ResultSet.java src/interfaces/jdbc/org/postgresql/Statement.java src/interfaces/jdbc/org/postgresql/core/BytePoolDim1.java src/interfaces/jdbc/org/postgresql/core/BytePoolDim2.java src/interfaces/jdbc/org/postgresql/core/Encoding.java src/interfaces/jdbc/org/postgresql/core/MemoryPool.java src/interfaces/jdbc/org/postgresql/core/ObjectPool.java src/interfaces/jdbc/org/postgresql/core/QueryExecutor.java src/interfaces/jdbc/org/postgresql/core/SimpleObjectPool.java src/interfaces/jdbc/org/postgresql/core/StartupPacket.java src/interfaces/jdbc/org/postgresql/errors.properties src/interfaces/jdbc/org/postgresql/errors_de.properties src/interfaces/jdbc/org/postgresql/errors_fr.properties src/interfaces/jdbc/org/postgresql/errors_it.properties src/interfaces/jdbc/org/postgresql/errors_nl.properties src/interfaces/jdbc/org/postgresql/errors_zh_TW.properties src/interfaces/jdbc/org/postgresql/fastpath/Fastpath.java src/interfaces/jdbc/org/postgresql/fastpath/FastpathArg.java src/interfaces/jdbc/org/postgresql/geometric/PGbox.java src/interfaces/jdbc/org/postgresql/geometric/PGcircle.java src/interfaces/jdbc/org/postgresql/geometric/PGline.java src/interfaces/jdbc/org/postgresql/geometric/PGlseg.java src/interfaces/jdbc/org/postgresql/geometric/PGpath.java src/interfaces/jdbc/org/postgresql/geometric/PGpoint.java src/interfaces/jdbc/org/postgresql/geometric/PGpolygon.java src/interfaces/jdbc/org/postgresql/jdbc1/CallableStatement.java src/interfaces/jdbc/org/postgresql/jdbc1/Connection.java src/interfaces/jdbc/org/postgresql/jdbc1/DatabaseMetaData.java src/interfaces/jdbc/org/postgresql/jdbc1/PreparedStatement.java src/interfaces/jdbc/org/postgresql/jdbc1/ResultSet.java src/interfaces/jdbc/org/postgresql/jdbc1/ResultSetMetaData.java src/interfaces/jdbc/org/postgresql/jdbc1/Statement.java src/interfaces/jdbc/org/postgresql/jdbc2/Array.java src/interfaces/jdbc/org/postgresql/jdbc2/CallableStatement.java src/interfaces/jdbc/org/postgresql/jdbc2/Connection.java src/interfaces/jdbc/org/postgresql/jdbc2/DatabaseMetaData.java src/interfaces/jdbc/org/postgresql/jdbc2/PBatchUpdateException.java src/interfaces/jdbc/org/postgresql/jdbc2/PreparedStatement.java src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java src/interfaces/jdbc/org/postgresql/jdbc2/ResultSetMetaData.java src/interfaces/jdbc/org/postgresql/jdbc2/Statement.java src/interfaces/jdbc/org/postgresql/jdbc2/UpdateableResultSet.java src/interfaces/jdbc/org/postgresql/largeobject/BlobInputStream.java src/interfaces/jdbc/org/postgresql/largeobject/BlobOutputStream.java src/interfaces/jdbc/org/postgresql/largeobject/LargeObject.java src/interfaces/jdbc/org/postgresql/largeobject/LargeObjectManager.java src/interfaces/jdbc/org/postgresql/largeobject/PGblob.java src/interfaces/jdbc/org/postgresql/largeobject/PGclob.java src/interfaces/jdbc/org/postgresql/test/JDBC2Tests.java src/interfaces/jdbc/org/postgresql/test/README src/interfaces/jdbc/org/postgresql/test/jdbc2/ANTTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/BatchExecuteTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/BlobTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/ConnectionTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/DatabaseMetaDataTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/DateTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/DriverTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/EncodingTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/JBuilderTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/MiscTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/ResultSetTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/TimeTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/TimestampTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/UpdateableResultTest.java src/interfaces/jdbc/org/postgresql/util/MD5Digest.java src/interfaces/jdbc/org/postgresql/util/MessageTranslator.java src/interfaces/jdbc/org/postgresql/util/PGbytea.java src/interfaces/jdbc/org/postgresql/util/PGmoney.java src/interfaces/jdbc/org/postgresql/util/PGobject.java src/interfaces/jdbc/org/postgresql/util/PGtokenizer.java src/interfaces/jdbc/org/postgresql/util/PSQLException.java src/interfaces/jdbc/org/postgresql/util/Serialize.java src/interfaces/jdbc/org/postgresql/util/UnixCrypt.java src/interfaces/jdbc/org/postgresql/xa/ClientConnection.java src/interfaces/jdbc/org/postgresql/xa/TwoPhaseConnection.java src/interfaces/jdbc/org/postgresql/xa/TxConnection.java src/interfaces/jdbc/org/postgresql/xa/XAConnectionImpl.java src/interfaces/jdbc/org/postgresql/xa/XADataSourceImpl.java src/interfaces/jdbc/utils/CheckVersion.java src/interfaces/jdbc/utils/buildDriver src/interfaces/jdbc/utils/changelog.pl src/interfaces/libpgeasy/Makefile src/interfaces/libpgeasy/README src/interfaces/libpgeasy/examples/Makefile src/interfaces/libpgeasy/examples/pginsert.c src/interfaces/libpgeasy/examples/pgmultiresult.c src/interfaces/libpgeasy/examples/pgnulltest.c src/interfaces/libpgeasy/examples/pgwordcount.c src/interfaces/libpgeasy/halt.c src/interfaces/libpgeasy/halt.h src/interfaces/libpgeasy/libpgeasy.c src/interfaces/libpgeasy/libpgeasy.h src/interfaces/libpgtcl/Makefile src/interfaces/libpgtcl/README 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src/interfaces/libpq/ru.po src/interfaces/libpq/sv.po src/interfaces/libpq/win32.c src/interfaces/libpq/win32.h src/interfaces/libpq/win32.mak src/interfaces/libpq/zh_CN.po src/interfaces/libpq/zh_TW.po src/interfaces/libpq++/CHANGES src/interfaces/libpq++/Makefile src/interfaces/libpq++/README src/interfaces/libpq++/TODO src/interfaces/libpq++/examples/Makefile src/interfaces/libpq++/examples/testlibpq0.cc src/interfaces/libpq++/examples/testlibpq1.cc src/interfaces/libpq++/examples/testlibpq2.cc src/interfaces/libpq++/examples/testlibpq2.sql src/interfaces/libpq++/examples/testlibpq3.cc src/interfaces/libpq++/examples/testlibpq3.sql src/interfaces/libpq++/examples/testlibpq4.cc src/interfaces/libpq++/examples/testlibpq4.sql src/interfaces/libpq++/examples/testlibpq5.cc src/interfaces/libpq++/examples/testlibpq5.sql src/interfaces/libpq++/examples/testlibpq6.cc src/interfaces/libpq++/examples/testlo.cc src/interfaces/libpq++/libpq++.h src/interfaces/libpq++/libpq++dll.rc src/interfaces/libpq++/pgconnection.cc src/interfaces/libpq++/pgconnection.h src/interfaces/libpq++/pgcursordb.cc src/interfaces/libpq++/pgcursordb.h src/interfaces/libpq++/pgdatabase.cc src/interfaces/libpq++/pgdatabase.h src/interfaces/libpq++/pglobject.cc src/interfaces/libpq++/pglobject.h src/interfaces/libpq++/pgtransdb.cc src/interfaces/libpq++/pgtransdb.h src/interfaces/libpq++/win32.mak src/interfaces/odbc/GNUmakefile src/interfaces/odbc/bind.c src/interfaces/odbc/bind.h src/interfaces/odbc/columninfo.c src/interfaces/odbc/columninfo.h src/interfaces/odbc/connection.c src/interfaces/odbc/connection.h src/interfaces/odbc/convert.c src/interfaces/odbc/convert.h src/interfaces/odbc/descriptor.h src/interfaces/odbc/dlg_specific.c src/interfaces/odbc/dlg_specific.h src/interfaces/odbc/dlg_wingui.c src/interfaces/odbc/drvconn.c src/interfaces/odbc/environ.c src/interfaces/odbc/environ.h src/interfaces/odbc/execute.c src/interfaces/odbc/gpps.c src/interfaces/odbc/gpps.h src/interfaces/odbc/info.c src/interfaces/odbc/info30.c src/interfaces/odbc/iodbc.h src/interfaces/odbc/isql.h src/interfaces/odbc/isqlext.h src/interfaces/odbc/license.txt src/interfaces/odbc/lobj.c src/interfaces/odbc/lobj.h src/interfaces/odbc/md5.c src/interfaces/odbc/md5.h src/interfaces/odbc/misc.c src/interfaces/odbc/misc.h src/interfaces/odbc/multibyte.c src/interfaces/odbc/multibyte.h src/interfaces/odbc/notice.txt src/interfaces/odbc/odbc.sql src/interfaces/odbc/odbcapi.c src/interfaces/odbc/odbcapi25w.c src/interfaces/odbc/odbcapi30.c src/interfaces/odbc/odbcapi30w.c src/interfaces/odbc/odbcapiw.c src/interfaces/odbc/odbcinst.ini src/interfaces/odbc/options.c src/interfaces/odbc/parse.c src/interfaces/odbc/pgapi30.c src/interfaces/odbc/pgapifunc.h src/interfaces/odbc/pgtypes.c src/interfaces/odbc/pgtypes.h src/interfaces/odbc/psqlodbc.c src/interfaces/odbc/psqlodbc.h src/interfaces/odbc/psqlodbc.rc src/interfaces/odbc/psqlodbc.reg src/interfaces/odbc/psqlodbc30.reg src/interfaces/odbc/psqlodbc30w.reg src/interfaces/odbc/psqlodbc_api30.def src/interfaces/odbc/psqlodbc_api30w.def src/interfaces/odbc/psqlodbc_apiw.def src/interfaces/odbc/psqlodbc_win32.def src/interfaces/odbc/qresult.c src/interfaces/odbc/qresult.h src/interfaces/odbc/readme.txt src/interfaces/odbc/resource.h src/interfaces/odbc/results.c src/interfaces/odbc/setup.c src/interfaces/odbc/setup.rul src/interfaces/odbc/socket.c src/interfaces/odbc/socket.h src/interfaces/odbc/statement.c src/interfaces/odbc/statement.h src/interfaces/odbc/tuple.c src/interfaces/odbc/tuple.h src/interfaces/odbc/tuplelist.c src/interfaces/odbc/tuplelist.h src/interfaces/odbc/version.h src/interfaces/odbc/win32.mak src/interfaces/odbc/win32_30.mak src/interfaces/odbc/win32_30w.mak src/interfaces/odbc/win32w.mak src/interfaces/odbc/win_md5.c src/interfaces/odbc/win_setup.h src/interfaces/odbc/win_unicode.c src/interfaces/perl5/Changes src/interfaces/perl5/GNUmakefile src/interfaces/perl5/MANIFEST src/interfaces/perl5/Makefile.PL src/interfaces/perl5/Pg.pm src/interfaces/perl5/Pg.xs src/interfaces/perl5/README src/interfaces/perl5/examples/ApachePg.pl src/interfaces/perl5/examples/example.newstyle src/interfaces/perl5/examples/example.oldstyle src/interfaces/perl5/ppport.h src/interfaces/perl5/test.pl src/interfaces/perl5/typemap src/interfaces/python/Announce src/interfaces/python/ChangeLog src/interfaces/python/GNUmakefile src/interfaces/python/PyGreSQL.spec src/interfaces/python/README src/interfaces/python/README.linux src/interfaces/python/Setup.in.raw src/interfaces/python/pg.py src/interfaces/python/pgdb.py src/interfaces/python/pgmodule.c src/interfaces/python/setup.py src/interfaces/python/tutorial/advanced.py src/interfaces/python/tutorial/basics.py src/interfaces/python/tutorial/func.py src/interfaces/python/tutorial/syscat.py src/interfaces/ssl/client.conf src/interfaces/ssl/mkcert.sh src/interfaces/ssl/pgkeygen.sh src/interfaces/ssl/root.conf src/interfaces/ssl/server.conf src/makefiles/Makefile.aix src/makefiles/Makefile.beos src/makefiles/Makefile.bsdi src/makefiles/Makefile.darwin src/makefiles/Makefile.dgux src/makefiles/Makefile.freebsd src/makefiles/Makefile.hpux src/makefiles/Makefile.irix5 src/makefiles/Makefile.linux src/makefiles/Makefile.netbsd src/makefiles/Makefile.openbsd src/makefiles/Makefile.osf src/makefiles/Makefile.qnx4 src/makefiles/Makefile.sco src/makefiles/Makefile.solaris src/makefiles/Makefile.sunos4 src/makefiles/Makefile.svr4 src/makefiles/Makefile.ultrix4 src/makefiles/Makefile.univel src/makefiles/Makefile.unixware src/makefiles/Makefile.win src/nls-global.mk src/pl/Makefile src/pl/plperl/GNUmakefile src/pl/plperl/README src/pl/plperl/SPI.xs src/pl/plperl/eloglvl.c src/pl/plperl/eloglvl.h src/pl/plperl/plperl.c src/pl/plperl/ppport.h src/pl/plpgsql/Makefile src/pl/plpgsql/src/.cvsignore src/pl/plpgsql/src/INSTALL src/pl/plpgsql/src/Makefile src/pl/plpgsql/src/gram.y src/pl/plpgsql/src/pl_comp.c 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src/test/bench/query01 src/test/bench/query02 src/test/bench/query03 src/test/bench/query04 src/test/bench/query05 src/test/bench/query06 src/test/bench/query07 src/test/bench/query08 src/test/bench/query09 src/test/bench/query10 src/test/bench/query11 src/test/bench/query12 src/test/bench/query13 src/test/bench/query14 src/test/bench/query15 src/test/bench/query16 src/test/bench/query17 src/test/bench/query18 src/test/bench/query19 src/test/bench/query20 src/test/bench/query21 src/test/bench/query22 src/test/bench/query23 src/test/bench/query24 src/test/bench/query25 src/test/bench/query26 src/test/bench/query27 src/test/bench/query28 src/test/bench/query29 src/test/bench/query30 src/test/bench/query31 src/test/bench/query32 src/test/bench/runwisc.sh src/test/bench/wholebench.sh src/test/examples/Makefile src/test/examples/testlibpq.c src/test/examples/testlibpq2.c src/test/examples/testlibpq2.sql src/test/examples/testlibpq3.c src/test/examples/testlibpq3.sql src/test/examples/testlibpq4.c src/test/examples/testlo.c src/test/locale/Makefile src/test/locale/README src/test/locale/de_DE.ISO8859-1/Makefile src/test/locale/de_DE.ISO8859-1/README src/test/locale/de_DE.ISO8859-1/expected/de-ctype.out src/test/locale/de_DE.ISO8859-1/expected/test-de-char.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-select.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-sort.out src/test/locale/de_DE.ISO8859-1/expected/test-de-text.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-upper-char.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-upper-text.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-upper-varchar.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-varchar.sql.out src/test/locale/de_DE.ISO8859-1/runall src/test/locale/de_DE.ISO8859-1/test-de-select.sql.in src/test/locale/de_DE.ISO8859-1/test-de-sort.in src/test/locale/de_DE.ISO8859-1/test-de-upper.sql.in src/test/locale/de_DE.ISO8859-1/test-de.sql.in src/test/locale/gr_GR.ISO8859-7/Makefile src/test/locale/gr_GR.ISO8859-7/README src/test/locale/gr_GR.ISO8859-7/expected/gr-ctype.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-char.sql.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-select.sql.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-sort.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-text.sql.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-varchar.sql.out src/test/locale/gr_GR.ISO8859-7/runall src/test/locale/gr_GR.ISO8859-7/test-gr-select.sql.in src/test/locale/gr_GR.ISO8859-7/test-gr-sort.in src/test/locale/gr_GR.ISO8859-7/test-gr.sql.in src/test/locale/koi8-r/Makefile src/test/locale/koi8-r/expected/koi8-ctype.out src/test/locale/koi8-r/expected/test-koi8-char.sql.out src/test/locale/koi8-r/expected/test-koi8-select.sql.out src/test/locale/koi8-r/expected/test-koi8-sort.out src/test/locale/koi8-r/expected/test-koi8-text.sql.out src/test/locale/koi8-r/expected/test-koi8-varchar.sql.out src/test/locale/koi8-r/runall src/test/locale/koi8-r/test-koi8-select.sql.in src/test/locale/koi8-r/test-koi8-sort.in src/test/locale/koi8-r/test-koi8.sql.in src/test/locale/koi8-to-win1251/Makefile src/test/locale/koi8-to-win1251/README src/test/locale/koi8-to-win1251/expected/test-koi8-char.sql.out src/test/locale/koi8-to-win1251/expected/test-koi8-select.sql.out src/test/locale/koi8-to-win1251/expected/test-koi8-sort.out src/test/locale/koi8-to-win1251/expected/test-koi8-text.sql.out src/test/locale/koi8-to-win1251/expected/test-koi8-varchar.sql.out src/test/locale/koi8-to-win1251/runall src/test/locale/koi8-to-win1251/test-koi8-select.sql.in src/test/locale/koi8-to-win1251/test-koi8-sort.in src/test/locale/koi8-to-win1251/test-koi8.sql.in src/test/locale/sort-test.pl src/test/locale/sort-test.py src/test/locale/test-ctype.c src/test/locale/test-pgsql-locale.c src/test/mb/README src/test/mb/expected/big5.out src/test/mb/expected/euc_cn.out src/test/mb/expected/euc_jp.out src/test/mb/expected/euc_kr.out src/test/mb/expected/euc_tw.out src/test/mb/expected/mule_internal.out src/test/mb/expected/sjis.out src/test/mb/expected/unicode.out src/test/mb/mbregress.sh src/test/mb/sql/big5.sql src/test/mb/sql/euc_cn.sql src/test/mb/sql/euc_jp.sql src/test/mb/sql/euc_kr.sql src/test/mb/sql/euc_tw.sql src/test/mb/sql/mule_internal.sql src/test/mb/sql/sjis.sql src/test/mb/sql/unicode.sql src/test/performance/results/PgSQL.970926 src/test/performance/runtests.pl src/test/performance/sqls/connection src/test/performance/sqls/crtsimple src/test/performance/sqls/crtsimpleidx src/test/performance/sqls/drpsimple src/test/performance/sqls/inssimple src/test/performance/sqls/inssimple.data src/test/performance/sqls/orbsimple src/test/performance/sqls/slcsimple src/test/performance/sqls/slcsimple.data src/test/performance/sqls/vacuum src/test/performance/start-pgsql.sh src/test/regress/GNUmakefile src/test/regress/Makefile src/test/regress/README src/test/regress/data/agg.data src/test/regress/data/constrf.data src/test/regress/data/constro.data src/test/regress/data/dept.data src/test/regress/data/desc.data src/test/regress/data/emp.data src/test/regress/data/hash.data src/test/regress/data/onek.data src/test/regress/data/person.data src/test/regress/data/real_city.data src/test/regress/data/rect.data src/test/regress/data/streets.data src/test/regress/data/stud_emp.data src/test/regress/data/student.data src/test/regress/data/tenk.data src/test/regress/expected/abstime-solaris-1947.out src/test/regress/expected/abstime.out src/test/regress/expected/aggregates.out src/test/regress/expected/alter_table.out src/test/regress/expected/arrays.out src/test/regress/expected/bit.out src/test/regress/expected/boolean.out src/test/regress/expected/box.out src/test/regress/expected/btree_index.out src/test/regress/expected/case.out src/test/regress/expected/char.out src/test/regress/expected/char_1.out src/test/regress/expected/circle.out src/test/regress/expected/comments.out src/test/regress/expected/create_aggregate.out src/test/regress/expected/create_index.out src/test/regress/expected/create_misc.out src/test/regress/expected/create_operator.out src/test/regress/expected/create_table.out src/test/regress/expected/create_type.out src/test/regress/expected/create_view.out src/test/regress/expected/date.out src/test/regress/expected/domain.out src/test/regress/expected/errors.out src/test/regress/expected/euc_cn.out src/test/regress/expected/euc_jp.out src/test/regress/expected/euc_kr.out src/test/regress/expected/euc_tw.out src/test/regress/expected/float4-exp-three-digits.out src/test/regress/expected/float4.out src/test/regress/expected/float8-exp-three-digits.out src/test/regress/expected/float8-fp-exception.out src/test/regress/expected/float8-small-is-zero.out src/test/regress/expected/float8.out src/test/regress/expected/foreign_key.out src/test/regress/expected/geometry-alpha-precision.out src/test/regress/expected/geometry-bsdi-precision.out src/test/regress/expected/geometry-i86-gnulibc.out src/test/regress/expected/geometry-intel-beos.out src/test/regress/expected/geometry-irix.out src/test/regress/expected/geometry-positive-zeros-bsd.out src/test/regress/expected/geometry-positive-zeros.out src/test/regress/expected/geometry-powerpc-aix4.out src/test/regress/expected/geometry-powerpc-darwin.out src/test/regress/expected/geometry-powerpc-linux-gnulibc1.out src/test/regress/expected/geometry-solaris-i386-pc.out src/test/regress/expected/geometry-solaris-precision.out src/test/regress/expected/geometry-uw7-cc.out src/test/regress/expected/geometry-uw7-gcc.out src/test/regress/expected/geometry.out src/test/regress/expected/hash_index.out src/test/regress/expected/horology-no-DST-before-1970.out src/test/regress/expected/horology-solaris-1947.out src/test/regress/expected/horology.out src/test/regress/expected/inet.out src/test/regress/expected/inherit.out src/test/regress/expected/insert.out src/test/regress/expected/int2.out src/test/regress/expected/int4.out src/test/regress/expected/int8-exp-three-digits.out src/test/regress/expected/int8.out src/test/regress/expected/interval.out src/test/regress/expected/join.out src/test/regress/expected/limit.out src/test/regress/expected/lseg.out src/test/regress/expected/mule_internal.out src/test/regress/expected/name.out src/test/regress/expected/numeric.out src/test/regress/expected/numeric_big.out src/test/regress/expected/numerology.out src/test/regress/expected/oid.out src/test/regress/expected/oidjoins.out src/test/regress/expected/opr_sanity.out src/test/regress/expected/path.out src/test/regress/expected/plpgsql.out src/test/regress/expected/point.out src/test/regress/expected/polygon.out src/test/regress/expected/portals.out src/test/regress/expected/portals_p2.out src/test/regress/expected/privileges.out src/test/regress/expected/random.out src/test/regress/expected/reltime.out src/test/regress/expected/rules.out src/test/regress/expected/sanity_check.out src/test/regress/expected/select.out src/test/regress/expected/select_distinct.out src/test/regress/expected/select_distinct_on.out src/test/regress/expected/select_having.out src/test/regress/expected/select_having_1.out src/test/regress/expected/select_implicit.out src/test/regress/expected/select_implicit_1.out src/test/regress/expected/select_into.out src/test/regress/expected/select_views.out src/test/regress/expected/select_views_1.out src/test/regress/expected/sql_ascii.out src/test/regress/expected/strings.out src/test/regress/expected/subselect.out src/test/regress/expected/temp.out src/test/regress/expected/text.out src/test/regress/expected/time.out src/test/regress/expected/timestamp.out src/test/regress/expected/timestamptz.out src/test/regress/expected/timetz.out src/test/regress/expected/tinterval-solaris-1947.out src/test/regress/expected/tinterval.out src/test/regress/expected/transactions.out src/test/regress/expected/triggers.out src/test/regress/expected/type_sanity.out src/test/regress/expected/union.out src/test/regress/expected/varchar.out src/test/regress/expected/varchar_1.out src/test/regress/input/constraints.source src/test/regress/input/copy.source src/test/regress/input/create_function_1.source src/test/regress/input/create_function_2.source src/test/regress/input/misc.source src/test/regress/output/constraints.source src/test/regress/output/copy.source src/test/regress/output/create_function_1.source src/test/regress/output/create_function_2.source src/test/regress/output/misc.source src/test/regress/parallel_schedule src/test/regress/pg_regress.sh src/test/regress/regress.c src/test/regress/regressplans.sh src/test/regress/resultmap src/test/regress/serial_schedule src/test/regress/sql/abstime.sql src/test/regress/sql/aggregates.sql src/test/regress/sql/alter_table.sql src/test/regress/sql/arrays.sql src/test/regress/sql/bit.sql src/test/regress/sql/boolean.sql src/test/regress/sql/box.sql src/test/regress/sql/btree_index.sql src/test/regress/sql/case.sql src/test/regress/sql/char.sql src/test/regress/sql/circle.sql src/test/regress/sql/comments.sql src/test/regress/sql/create_aggregate.sql src/test/regress/sql/create_index.sql src/test/regress/sql/create_misc.sql src/test/regress/sql/create_operator.sql src/test/regress/sql/create_table.sql src/test/regress/sql/create_type.sql src/test/regress/sql/create_view.sql src/test/regress/sql/date.sql src/test/regress/sql/domain.sql src/test/regress/sql/drop.sql src/test/regress/sql/errors.sql src/test/regress/sql/euc_cn.sql src/test/regress/sql/euc_jp.sql src/test/regress/sql/euc_kr.sql src/test/regress/sql/euc_tw.sql src/test/regress/sql/float4.sql src/test/regress/sql/float8.sql src/test/regress/sql/foreign_key.sql src/test/regress/sql/geometry.sql src/test/regress/sql/hash_index.sql src/test/regress/sql/horology.sql src/test/regress/sql/inet.sql src/test/regress/sql/inherit.sql src/test/regress/sql/insert.sql src/test/regress/sql/int2.sql src/test/regress/sql/int4.sql src/test/regress/sql/int8.sql src/test/regress/sql/interval.sql src/test/regress/sql/join.sql src/test/regress/sql/limit.sql src/test/regress/sql/lseg.sql src/test/regress/sql/mule_internal.sql src/test/regress/sql/name.sql src/test/regress/sql/numeric.sql src/test/regress/sql/numeric_big.sql src/test/regress/sql/numerology.sql src/test/regress/sql/oid.sql src/test/regress/sql/oidjoins.sql src/test/regress/sql/opr_sanity.sql src/test/regress/sql/path.sql src/test/regress/sql/plpgsql.sql src/test/regress/sql/point.sql src/test/regress/sql/polygon.sql src/test/regress/sql/portals.sql src/test/regress/sql/portals_p2.sql src/test/regress/sql/privileges.sql src/test/regress/sql/random.sql src/test/regress/sql/reltime.sql src/test/regress/sql/rules.sql src/test/regress/sql/sanity_check.sql src/test/regress/sql/select.sql src/test/regress/sql/select_distinct.sql src/test/regress/sql/select_distinct_on.sql src/test/regress/sql/select_having.sql src/test/regress/sql/select_implicit.sql src/test/regress/sql/select_into.sql src/test/regress/sql/select_views.sql src/test/regress/sql/sql_ascii.sql src/test/regress/sql/strings.sql src/test/regress/sql/subselect.sql src/test/regress/sql/temp.sql src/test/regress/sql/text.sql src/test/regress/sql/time.sql src/test/regress/sql/timestamp.sql src/test/regress/sql/timestamptz.sql src/test/regress/sql/timetz.sql src/test/regress/sql/tinterval.sql src/test/regress/sql/transactions.sql src/test/regress/sql/triggers.sql src/test/regress/sql/type_sanity.sql src/test/regress/sql/union.sql src/test/regress/sql/varchar.sql src/tools/RELEASE_CHANGES src/tools/backend/README src/tools/backend/backend_dirs.html src/tools/backend/flow.fig src/tools/backend/flow.gif src/tools/backend/index.html src/tools/ccsym src/tools/copyright src/tools/entab/Makefile src/tools/entab/entab.c src/tools/entab/entab.man src/tools/entab/halt.c src/tools/find_badmacros src/tools/find_static src/tools/find_typedef src/tools/make_ctags src/tools/make_diff/README src/tools/make_diff/cporig src/tools/make_diff/difforig src/tools/make_diff/rmorig src/tools/make_etags src/tools/make_keywords src/tools/make_mkid src/tools/pgcvslog src/tools/pginclude/README src/tools/pginclude/pgcompinclude src/tools/pginclude/pgdefine src/tools/pginclude/pgfixinclude src/tools/pginclude/pgrminclude src/tools/pgindent/README src/tools/pgindent/indent.bsd.patch src/tools/pgindent/pgcppindent src/tools/pgindent/pgindent src/tools/pgindent/pgjindent src/tutorial/Makefile src/tutorial/README src/tutorial/advanced.source src/tutorial/basics.source src/tutorial/beard.c src/tutorial/complex.c src/tutorial/complex.source src/tutorial/funcs.c src/tutorial/funcs.source src/tutorial/funcs_new.c src/tutorial/syscat.source src/utils/Makefile src/utils/README src/utils/dllinit.c src/utils/getopt.c src/utils/strdup.c src/win32.mak
Diffstat (limited to 'src/backend/access/transam/xlog.c')
-rw-r--r--src/backend/access/transam/xlog.c3373
1 files changed, 0 insertions, 3373 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
deleted file mode 100644
index 57e2dc6053a..00000000000
--- a/src/backend/access/transam/xlog.c
+++ /dev/null
@@ -1,3373 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * xlog.c
- * PostgreSQL transaction log manager
- *
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.98 2002/06/20 20:29:25 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-
-#include "postgres.h"
-
-#include <fcntl.h>
-#include <signal.h>
-#include <unistd.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <locale.h>
-
-#include "access/clog.h"
-#include "access/transam.h"
-#include "access/xact.h"
-#include "access/xlog.h"
-#include "access/xlogutils.h"
-#include "catalog/catversion.h"
-#include "catalog/pg_control.h"
-#include "storage/bufpage.h"
-#include "storage/lwlock.h"
-#include "storage/pmsignal.h"
-#include "storage/proc.h"
-#include "storage/sinval.h"
-#include "storage/spin.h"
-#include "utils/builtins.h"
-#include "utils/relcache.h"
-#include "miscadmin.h"
-
-
-/*
- * This chunk of hackery attempts to determine which file sync methods
- * are available on the current platform, and to choose an appropriate
- * default method. We assume that fsync() is always available, and that
- * configure determined whether fdatasync() is.
- */
-#define SYNC_METHOD_FSYNC 0
-#define SYNC_METHOD_FDATASYNC 1
-#define SYNC_METHOD_OPEN 2 /* used for both O_SYNC and
- * O_DSYNC */
-
-#if defined(O_SYNC)
-#define OPEN_SYNC_FLAG O_SYNC
-#else
-#if defined(O_FSYNC)
-#define OPEN_SYNC_FLAG O_FSYNC
-#endif
-#endif
-
-#if defined(OPEN_SYNC_FLAG)
-#if defined(O_DSYNC) && (O_DSYNC != OPEN_SYNC_FLAG)
-#define OPEN_DATASYNC_FLAG O_DSYNC
-#endif
-#endif
-
-#if defined(OPEN_DATASYNC_FLAG)
-#define DEFAULT_SYNC_METHOD_STR "open_datasync"
-#define DEFAULT_SYNC_METHOD SYNC_METHOD_OPEN
-#define DEFAULT_SYNC_FLAGBIT OPEN_DATASYNC_FLAG
-#else
-#if defined(HAVE_FDATASYNC)
-#define DEFAULT_SYNC_METHOD_STR "fdatasync"
-#define DEFAULT_SYNC_METHOD SYNC_METHOD_FDATASYNC
-#define DEFAULT_SYNC_FLAGBIT 0
-#else
-#define DEFAULT_SYNC_METHOD_STR "fsync"
-#define DEFAULT_SYNC_METHOD SYNC_METHOD_FSYNC
-#define DEFAULT_SYNC_FLAGBIT 0
-#endif
-#endif
-
-
-/* User-settable parameters */
-int CheckPointSegments = 3;
-int XLOGbuffers = 8;
-int XLOGfiles = 0; /* # of files to preallocate during ckpt */
-int XLOG_DEBUG = 0;
-char *XLOG_sync_method = NULL;
-const char XLOG_sync_method_default[] = DEFAULT_SYNC_METHOD_STR;
-char XLOG_archive_dir[MAXPGPATH]; /* null string means
- * delete 'em */
-
-/*
- * XLOGfileslop is used in the code as the allowed "fuzz" in the number of
- * preallocated XLOG segments --- we try to have at least XLOGfiles advance
- * segments but no more than XLOGfiles+XLOGfileslop segments. This could
- * be made a separate GUC variable, but at present I think it's sufficient
- * to hardwire it as 2*CheckPointSegments+1. Under normal conditions, a
- * checkpoint will free no more than 2*CheckPointSegments log segments, and
- * we want to recycle all of them; the +1 allows boundary cases to happen
- * without wasting a delete/create-segment cycle.
- */
-
-#define XLOGfileslop (2*CheckPointSegments + 1)
-
-
-/* these are derived from XLOG_sync_method by assign_xlog_sync_method */
-static int sync_method = DEFAULT_SYNC_METHOD;
-static int open_sync_bit = DEFAULT_SYNC_FLAGBIT;
-
-#define XLOG_SYNC_BIT (enableFsync ? open_sync_bit : 0)
-
-#define MinXLOGbuffers 4
-
-
-/*
- * ThisStartUpID will be same in all backends --- it identifies current
- * instance of the database system.
- */
-StartUpID ThisStartUpID = 0;
-
-/* Are we doing recovery by reading XLOG? */
-bool InRecovery = false;
-
-/*
- * MyLastRecPtr points to the start of the last XLOG record inserted by the
- * current transaction. If MyLastRecPtr.xrecoff == 0, then the current
- * xact hasn't yet inserted any transaction-controlled XLOG records.
- *
- * Note that XLOG records inserted outside transaction control are not
- * reflected into MyLastRecPtr. They do, however, cause MyXactMadeXLogEntry
- * to be set true. The latter can be used to test whether the current xact
- * made any loggable changes (including out-of-xact changes, such as
- * sequence updates).
- */
-XLogRecPtr MyLastRecPtr = {0, 0};
-
-bool MyXactMadeXLogEntry = false;
-
-/*
- * ProcLastRecPtr points to the start of the last XLOG record inserted by the
- * current backend. It is updated for all inserts, transaction-controlled
- * or not. ProcLastRecEnd is similar but points to end+1 of last record.
- */
-static XLogRecPtr ProcLastRecPtr = {0, 0};
-
-XLogRecPtr ProcLastRecEnd = {0, 0};
-
-/*
- * RedoRecPtr is this backend's local copy of the REDO record pointer
- * (which is almost but not quite the same as a pointer to the most recent
- * CHECKPOINT record). We update this from the shared-memory copy,
- * XLogCtl->Insert.RedoRecPtr, whenever we can safely do so (ie, when we
- * hold the Insert lock). See XLogInsert for details. We are also allowed
- * to update from XLogCtl->Insert.RedoRecPtr if we hold the info_lck;
- * see GetRedoRecPtr.
- */
-static XLogRecPtr RedoRecPtr;
-
-/*----------
- * Shared-memory data structures for XLOG control
- *
- * LogwrtRqst indicates a byte position that we need to write and/or fsync
- * the log up to (all records before that point must be written or fsynced).
- * LogwrtResult indicates the byte positions we have already written/fsynced.
- * These structs are identical but are declared separately to indicate their
- * slightly different functions.
- *
- * We do a lot of pushups to minimize the amount of access to lockable
- * shared memory values. There are actually three shared-memory copies of
- * LogwrtResult, plus one unshared copy in each backend. Here's how it works:
- * XLogCtl->LogwrtResult is protected by info_lck
- * XLogCtl->Write.LogwrtResult is protected by WALWriteLock
- * XLogCtl->Insert.LogwrtResult is protected by WALInsertLock
- * One must hold the associated lock to read or write any of these, but
- * of course no lock is needed to read/write the unshared LogwrtResult.
- *
- * XLogCtl->LogwrtResult and XLogCtl->Write.LogwrtResult are both "always
- * right", since both are updated by a write or flush operation before
- * it releases WALWriteLock. The point of keeping XLogCtl->Write.LogwrtResult
- * is that it can be examined/modified by code that already holds WALWriteLock
- * without needing to grab info_lck as well.
- *
- * XLogCtl->Insert.LogwrtResult may lag behind the reality of the other two,
- * but is updated when convenient. Again, it exists for the convenience of
- * code that is already holding WALInsertLock but not the other locks.
- *
- * The unshared LogwrtResult may lag behind any or all of these, and again
- * is updated when convenient.
- *
- * The request bookkeeping is simpler: there is a shared XLogCtl->LogwrtRqst
- * (protected by info_lck), but we don't need to cache any copies of it.
- *
- * Note that this all works because the request and result positions can only
- * advance forward, never back up, and so we can easily determine which of two
- * values is "more up to date".
- *
- * info_lck is only held long enough to read/update the protected variables,
- * so it's a plain spinlock. The other locks are held longer (potentially
- * over I/O operations), so we use LWLocks for them. These locks are:
- *
- * WALInsertLock: must be held to insert a record into the WAL buffers.
- *
- * WALWriteLock: must be held to write WAL buffers to disk (XLogWrite or
- * XLogFlush).
- *
- * ControlFileLock: must be held to read/update control file or create
- * new log file.
- *
- * CheckpointLock: must be held to do a checkpoint (ensures only one
- * checkpointer at a time; even though the postmaster won't launch
- * parallel checkpoint processes, we need this because manual checkpoints
- * could be launched simultaneously).
- *
- *----------
- */
-typedef struct XLogwrtRqst
-{
- XLogRecPtr Write; /* last byte + 1 to write out */
- XLogRecPtr Flush; /* last byte + 1 to flush */
-} XLogwrtRqst;
-
-typedef struct XLogwrtResult
-{
- XLogRecPtr Write; /* last byte + 1 written out */
- XLogRecPtr Flush; /* last byte + 1 flushed */
-} XLogwrtResult;
-
-/*
- * Shared state data for XLogInsert.
- */
-typedef struct XLogCtlInsert
-{
- XLogwrtResult LogwrtResult; /* a recent value of LogwrtResult */
- XLogRecPtr PrevRecord; /* start of previously-inserted record */
- uint16 curridx; /* current block index in cache */
- XLogPageHeader currpage; /* points to header of block in cache */
- char *currpos; /* current insertion point in cache */
- XLogRecPtr RedoRecPtr; /* current redo point for insertions */
-} XLogCtlInsert;
-
-/*
- * Shared state data for XLogWrite/XLogFlush.
- */
-typedef struct XLogCtlWrite
-{
- XLogwrtResult LogwrtResult; /* current value of LogwrtResult */
- uint16 curridx; /* cache index of next block to write */
-} XLogCtlWrite;
-
-/*
- * Total shared-memory state for XLOG.
- */
-typedef struct XLogCtlData
-{
- /* Protected by WALInsertLock: */
- XLogCtlInsert Insert;
- /* Protected by info_lck: */
- XLogwrtRqst LogwrtRqst;
- XLogwrtResult LogwrtResult;
- /* Protected by WALWriteLock: */
- XLogCtlWrite Write;
-
- /*
- * These values do not change after startup, although the pointed-to
- * pages and xlblocks values certainly do. Permission to read/write
- * the pages and xlblocks values depends on WALInsertLock and
- * WALWriteLock.
- */
- char *pages; /* buffers for unwritten XLOG pages */
- XLogRecPtr *xlblocks; /* 1st byte ptr-s + BLCKSZ */
- uint32 XLogCacheByte; /* # bytes in xlog buffers */
- uint32 XLogCacheBlck; /* highest allocated xlog buffer index */
- StartUpID ThisStartUpID;
-
- /* This value is not protected by *any* lock... */
- /* see SetSavedRedoRecPtr/GetSavedRedoRecPtr */
- XLogRecPtr SavedRedoRecPtr;
-
- slock_t info_lck; /* locks shared LogwrtRqst/LogwrtResult */
-} XLogCtlData;
-
-static XLogCtlData *XLogCtl = NULL;
-
-/*
- * We maintain an image of pg_control in shared memory.
- */
-static ControlFileData *ControlFile = NULL;
-
-/*
- * Macros for managing XLogInsert state. In most cases, the calling routine
- * has local copies of XLogCtl->Insert and/or XLogCtl->Insert->curridx,
- * so these are passed as parameters instead of being fetched via XLogCtl.
- */
-
-/* Free space remaining in the current xlog page buffer */
-#define INSERT_FREESPACE(Insert) \
- (BLCKSZ - ((Insert)->currpos - (char *) (Insert)->currpage))
-
-/* Construct XLogRecPtr value for current insertion point */
-#define INSERT_RECPTR(recptr,Insert,curridx) \
- ( \
- (recptr).xlogid = XLogCtl->xlblocks[curridx].xlogid, \
- (recptr).xrecoff = \
- XLogCtl->xlblocks[curridx].xrecoff - INSERT_FREESPACE(Insert) \
- )
-
-
-/* Increment an xlogid/segment pair */
-#define NextLogSeg(logId, logSeg) \
- do { \
- if ((logSeg) >= XLogSegsPerFile-1) \
- { \
- (logId)++; \
- (logSeg) = 0; \
- } \
- else \
- (logSeg)++; \
- } while (0)
-
-/* Decrement an xlogid/segment pair (assume it's not 0,0) */
-#define PrevLogSeg(logId, logSeg) \
- do { \
- if (logSeg) \
- (logSeg)--; \
- else \
- { \
- (logId)--; \
- (logSeg) = XLogSegsPerFile-1; \
- } \
- } while (0)
-
-/*
- * Compute ID and segment from an XLogRecPtr.
- *
- * For XLByteToSeg, do the computation at face value. For XLByteToPrevSeg,
- * a boundary byte is taken to be in the previous segment. This is suitable
- * for deciding which segment to write given a pointer to a record end,
- * for example.
- */
-#define XLByteToSeg(xlrp, logId, logSeg) \
- ( logId = (xlrp).xlogid, \
- logSeg = (xlrp).xrecoff / XLogSegSize \
- )
-#define XLByteToPrevSeg(xlrp, logId, logSeg) \
- ( logId = (xlrp).xlogid, \
- logSeg = ((xlrp).xrecoff - 1) / XLogSegSize \
- )
-
-/*
- * Is an XLogRecPtr within a particular XLOG segment?
- *
- * For XLByteInSeg, do the computation at face value. For XLByteInPrevSeg,
- * a boundary byte is taken to be in the previous segment.
- */
-#define XLByteInSeg(xlrp, logId, logSeg) \
- ((xlrp).xlogid == (logId) && \
- (xlrp).xrecoff / XLogSegSize == (logSeg))
-
-#define XLByteInPrevSeg(xlrp, logId, logSeg) \
- ((xlrp).xlogid == (logId) && \
- ((xlrp).xrecoff - 1) / XLogSegSize == (logSeg))
-
-
-#define XLogFileName(path, log, seg) \
- snprintf(path, MAXPGPATH, "%s/%08X%08X", \
- XLogDir, log, seg)
-
-#define PrevBufIdx(idx) \
- (((idx) == 0) ? XLogCtl->XLogCacheBlck : ((idx) - 1))
-
-#define NextBufIdx(idx) \
- (((idx) == XLogCtl->XLogCacheBlck) ? 0 : ((idx) + 1))
-
-#define XRecOffIsValid(xrecoff) \
- ((xrecoff) % BLCKSZ >= SizeOfXLogPHD && \
- (BLCKSZ - (xrecoff) % BLCKSZ) >= SizeOfXLogRecord)
-
-/*
- * _INTL_MAXLOGRECSZ: max space needed for a record including header and
- * any backup-block data.
- */
-#define _INTL_MAXLOGRECSZ (SizeOfXLogRecord + MAXLOGRECSZ + \
- XLR_MAX_BKP_BLOCKS * (sizeof(BkpBlock) + BLCKSZ))
-
-
-/* File path names */
-static char XLogDir[MAXPGPATH];
-static char ControlFilePath[MAXPGPATH];
-
-/*
- * Private, possibly out-of-date copy of shared LogwrtResult.
- * See discussion above.
- */
-static XLogwrtResult LogwrtResult = {{0, 0}, {0, 0}};
-
-/*
- * openLogFile is -1 or a kernel FD for an open log file segment.
- * When it's open, openLogOff is the current seek offset in the file.
- * openLogId/openLogSeg identify the segment. These variables are only
- * used to write the XLOG, and so will normally refer to the active segment.
- */
-static int openLogFile = -1;
-static uint32 openLogId = 0;
-static uint32 openLogSeg = 0;
-static uint32 openLogOff = 0;
-
-/*
- * These variables are used similarly to the ones above, but for reading
- * the XLOG. Note, however, that readOff generally represents the offset
- * of the page just read, not the seek position of the FD itself, which
- * will be just past that page.
- */
-static int readFile = -1;
-static uint32 readId = 0;
-static uint32 readSeg = 0;
-static uint32 readOff = 0;
-
-/* Buffer for currently read page (BLCKSZ bytes) */
-static char *readBuf = NULL;
-
-/* State information for XLOG reading */
-static XLogRecPtr ReadRecPtr;
-static XLogRecPtr EndRecPtr;
-static XLogRecord *nextRecord = NULL;
-static StartUpID lastReadSUI;
-
-static bool InRedo = false;
-
-
-static bool AdvanceXLInsertBuffer(void);
-static void XLogWrite(XLogwrtRqst WriteRqst);
-static int XLogFileInit(uint32 log, uint32 seg,
- bool *use_existent, bool use_lock);
-static bool InstallXLogFileSegment(uint32 log, uint32 seg, char *tmppath,
- bool find_free, int max_advance,
- bool use_lock);
-static int XLogFileOpen(uint32 log, uint32 seg, bool econt);
-static void PreallocXlogFiles(XLogRecPtr endptr);
-static void MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr);
-static XLogRecord *ReadRecord(XLogRecPtr *RecPtr, int emode, char *buffer);
-static bool ValidXLOGHeader(XLogPageHeader hdr, int emode, bool checkSUI);
-static XLogRecord *ReadCheckpointRecord(XLogRecPtr RecPtr,
- int whichChkpt,
- char *buffer);
-static void WriteControlFile(void);
-static void ReadControlFile(void);
-static char *str_time(time_t tnow);
-static void xlog_outrec(char *buf, XLogRecord *record);
-static void issue_xlog_fsync(void);
-
-
-/*
- * Insert an XLOG record having the specified RMID and info bytes,
- * with the body of the record being the data chunk(s) described by
- * the rdata list (see xlog.h for notes about rdata).
- *
- * Returns XLOG pointer to end of record (beginning of next record).
- * This can be used as LSN for data pages affected by the logged action.
- * (LSN is the XLOG point up to which the XLOG must be flushed to disk
- * before the data page can be written out. This implements the basic
- * WAL rule "write the log before the data".)
- *
- * NB: this routine feels free to scribble on the XLogRecData structs,
- * though not on the data they reference. This is OK since the XLogRecData
- * structs are always just temporaries in the calling code.
- */
-XLogRecPtr
-XLogInsert(RmgrId rmid, uint8 info, XLogRecData *rdata)
-{
- XLogCtlInsert *Insert = &XLogCtl->Insert;
- XLogRecord *record;
- XLogContRecord *contrecord;
- XLogRecPtr RecPtr;
- XLogRecPtr WriteRqst;
- uint32 freespace;
- uint16 curridx;
- XLogRecData *rdt;
- Buffer dtbuf[XLR_MAX_BKP_BLOCKS];
- bool dtbuf_bkp[XLR_MAX_BKP_BLOCKS];
- BkpBlock dtbuf_xlg[XLR_MAX_BKP_BLOCKS];
- XLogRecPtr dtbuf_lsn[XLR_MAX_BKP_BLOCKS];
- XLogRecData dtbuf_rdt[2 * XLR_MAX_BKP_BLOCKS];
- crc64 rdata_crc;
- uint32 len,
- write_len;
- unsigned i;
- XLogwrtRqst LogwrtRqst;
- bool updrqst;
- bool no_tran = (rmid == RM_XLOG_ID) ? true : false;
-
- if (info & XLR_INFO_MASK)
- {
- if ((info & XLR_INFO_MASK) != XLOG_NO_TRAN)
- elog(PANIC, "XLogInsert: invalid info mask %02X",
- (info & XLR_INFO_MASK));
- no_tran = true;
- info &= ~XLR_INFO_MASK;
- }
-
- /*
- * In bootstrap mode, we don't actually log anything but XLOG
- * resources; return a phony record pointer.
- */
- if (IsBootstrapProcessingMode() && rmid != RM_XLOG_ID)
- {
- RecPtr.xlogid = 0;
- RecPtr.xrecoff = SizeOfXLogPHD; /* start of 1st checkpoint record */
- return (RecPtr);
- }
-
- /*
- * Here we scan the rdata list, determine which buffers must be backed
- * up, and compute the CRC values for the data. Note that the record
- * header isn't added into the CRC yet since we don't know the final
- * length or info bits quite yet.
- *
- * We may have to loop back to here if a race condition is detected
- * below. We could prevent the race by doing all this work while
- * holding the insert lock, but it seems better to avoid doing CRC
- * calculations while holding the lock. This means we have to be
- * careful about modifying the rdata list until we know we aren't
- * going to loop back again. The only change we allow ourselves to
- * make earlier is to set rdt->data = NULL in list items we have
- * decided we will have to back up the whole buffer for. This is OK
- * because we will certainly decide the same thing again for those
- * items if we do it over; doing it here saves an extra pass over the
- * list later.
- */
-begin:;
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- dtbuf[i] = InvalidBuffer;
- dtbuf_bkp[i] = false;
- }
-
- INIT_CRC64(rdata_crc);
- len = 0;
- for (rdt = rdata;;)
- {
- if (rdt->buffer == InvalidBuffer)
- {
- /* Simple data, just include it */
- len += rdt->len;
- COMP_CRC64(rdata_crc, rdt->data, rdt->len);
- }
- else
- {
- /* Find info for buffer */
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (rdt->buffer == dtbuf[i])
- {
- /* Buffer already referenced by earlier list item */
- if (dtbuf_bkp[i])
- rdt->data = NULL;
- else if (rdt->data)
- {
- len += rdt->len;
- COMP_CRC64(rdata_crc, rdt->data, rdt->len);
- }
- break;
- }
- if (dtbuf[i] == InvalidBuffer)
- {
- /* OK, put it in this slot */
- dtbuf[i] = rdt->buffer;
-
- /*
- * XXX We assume page LSN is first data on page
- */
- dtbuf_lsn[i] = *((XLogRecPtr *) BufferGetBlock(rdt->buffer));
- if (XLByteLE(dtbuf_lsn[i], RedoRecPtr))
- {
- crc64 dtcrc;
-
- dtbuf_bkp[i] = true;
- rdt->data = NULL;
- INIT_CRC64(dtcrc);
- COMP_CRC64(dtcrc,
- BufferGetBlock(dtbuf[i]),
- BLCKSZ);
- dtbuf_xlg[i].node = BufferGetFileNode(dtbuf[i]);
- dtbuf_xlg[i].block = BufferGetBlockNumber(dtbuf[i]);
- COMP_CRC64(dtcrc,
- (char *) &(dtbuf_xlg[i]) + sizeof(crc64),
- sizeof(BkpBlock) - sizeof(crc64));
- FIN_CRC64(dtcrc);
- dtbuf_xlg[i].crc = dtcrc;
- }
- else if (rdt->data)
- {
- len += rdt->len;
- COMP_CRC64(rdata_crc, rdt->data, rdt->len);
- }
- break;
- }
- }
- if (i >= XLR_MAX_BKP_BLOCKS)
- elog(PANIC, "XLogInsert: can backup %d blocks at most",
- XLR_MAX_BKP_BLOCKS);
- }
- /* Break out of loop when rdt points to last list item */
- if (rdt->next == NULL)
- break;
- rdt = rdt->next;
- }
-
- /*
- * NOTE: the test for len == 0 here is somewhat fishy, since in theory
- * all of the rmgr data might have been suppressed in favor of backup
- * blocks. Currently, all callers of XLogInsert provide at least some
- * not-in-a-buffer data and so len == 0 should never happen, but that
- * may not be true forever. If you need to remove the len == 0 check,
- * also remove the check for xl_len == 0 in ReadRecord, below.
- */
- if (len == 0 || len > MAXLOGRECSZ)
- elog(PANIC, "XLogInsert: invalid record length %u", len);
-
- START_CRIT_SECTION();
-
- /* update LogwrtResult before doing cache fill check */
- {
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- LogwrtRqst = xlogctl->LogwrtRqst;
- LogwrtResult = xlogctl->LogwrtResult;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
- }
-
- /*
- * If cache is half filled then try to acquire write lock and do
- * XLogWrite. Ignore any fractional blocks in performing this check.
- */
- LogwrtRqst.Write.xrecoff -= LogwrtRqst.Write.xrecoff % BLCKSZ;
- if (LogwrtRqst.Write.xlogid != LogwrtResult.Write.xlogid ||
- (LogwrtRqst.Write.xrecoff >= LogwrtResult.Write.xrecoff +
- XLogCtl->XLogCacheByte / 2))
- {
- if (LWLockConditionalAcquire(WALWriteLock, LW_EXCLUSIVE))
- {
- LogwrtResult = XLogCtl->Write.LogwrtResult;
- if (XLByteLT(LogwrtResult.Write, LogwrtRqst.Write))
- XLogWrite(LogwrtRqst);
- LWLockRelease(WALWriteLock);
- }
- }
-
- /* Now wait to get insert lock */
- LWLockAcquire(WALInsertLock, LW_EXCLUSIVE);
-
- /*
- * Check to see if my RedoRecPtr is out of date. If so, may have to
- * go back and recompute everything. This can only happen just after
- * a checkpoint, so it's better to be slow in this case and fast
- * otherwise.
- */
- if (!XLByteEQ(RedoRecPtr, Insert->RedoRecPtr))
- {
- Assert(XLByteLT(RedoRecPtr, Insert->RedoRecPtr));
- RedoRecPtr = Insert->RedoRecPtr;
-
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (dtbuf[i] == InvalidBuffer)
- continue;
- if (dtbuf_bkp[i] == false &&
- XLByteLE(dtbuf_lsn[i], RedoRecPtr))
- {
- /*
- * Oops, this buffer now needs to be backed up, but we
- * didn't think so above. Start over.
- */
- LWLockRelease(WALInsertLock);
- END_CRIT_SECTION();
- goto begin;
- }
- }
- }
-
- /*
- * Make additional rdata list entries for the backup blocks, so that
- * we don't need to special-case them in the write loop. Note that we
- * have now irrevocably changed the input rdata list. At the exit of
- * this loop, write_len includes the backup block data.
- *
- * Also set the appropriate info bits to show which buffers were backed
- * up. The i'th XLR_SET_BKP_BLOCK bit corresponds to the i'th
- * distinct buffer value (ignoring InvalidBuffer) appearing in the
- * rdata list.
- */
- write_len = len;
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (dtbuf[i] == InvalidBuffer || !(dtbuf_bkp[i]))
- continue;
-
- info |= XLR_SET_BKP_BLOCK(i);
-
- rdt->next = &(dtbuf_rdt[2 * i]);
-
- dtbuf_rdt[2 * i].data = (char *) &(dtbuf_xlg[i]);
- dtbuf_rdt[2 * i].len = sizeof(BkpBlock);
- write_len += sizeof(BkpBlock);
-
- rdt = dtbuf_rdt[2 * i].next = &(dtbuf_rdt[2 * i + 1]);
-
- dtbuf_rdt[2 * i + 1].data = (char *) BufferGetBlock(dtbuf[i]);
- dtbuf_rdt[2 * i + 1].len = BLCKSZ;
- write_len += BLCKSZ;
- dtbuf_rdt[2 * i + 1].next = NULL;
- }
-
- /* Insert record header */
-
- updrqst = false;
- freespace = INSERT_FREESPACE(Insert);
- if (freespace < SizeOfXLogRecord)
- {
- updrqst = AdvanceXLInsertBuffer();
- freespace = BLCKSZ - SizeOfXLogPHD;
- }
-
- curridx = Insert->curridx;
- record = (XLogRecord *) Insert->currpos;
-
- record->xl_prev = Insert->PrevRecord;
- if (no_tran)
- {
- record->xl_xact_prev.xlogid = 0;
- record->xl_xact_prev.xrecoff = 0;
- }
- else
- record->xl_xact_prev = MyLastRecPtr;
-
- record->xl_xid = GetCurrentTransactionId();
- record->xl_len = len; /* doesn't include backup blocks */
- record->xl_info = info;
- record->xl_rmid = rmid;
-
- /* Now we can finish computing the main CRC */
- COMP_CRC64(rdata_crc, (char *) record + sizeof(crc64),
- SizeOfXLogRecord - sizeof(crc64));
- FIN_CRC64(rdata_crc);
- record->xl_crc = rdata_crc;
-
- /* Compute record's XLOG location */
- INSERT_RECPTR(RecPtr, Insert, curridx);
-
- /* If first XLOG record of transaction, save it in PGPROC array */
- if (MyLastRecPtr.xrecoff == 0 && !no_tran)
- {
- /*
- * We do not acquire SInvalLock here because of possible deadlock.
- * Anyone who wants to inspect other procs' logRec must acquire
- * WALInsertLock, instead. A better solution would be a per-PROC
- * spinlock, but no time for that before 7.2 --- tgl 12/19/01.
- */
- MyProc->logRec = RecPtr;
- }
-
- if (XLOG_DEBUG)
- {
- char buf[8192];
-
- sprintf(buf, "INSERT @ %X/%X: ", RecPtr.xlogid, RecPtr.xrecoff);
- xlog_outrec(buf, record);
- if (rdata->data != NULL)
- {
- strcat(buf, " - ");
- RmgrTable[record->xl_rmid].rm_desc(buf, record->xl_info, rdata->data);
- }
- elog(LOG, "%s", buf);
- }
-
- /* Record begin of record in appropriate places */
- if (!no_tran)
- MyLastRecPtr = RecPtr;
- ProcLastRecPtr = RecPtr;
- Insert->PrevRecord = RecPtr;
- MyXactMadeXLogEntry = true;
-
- Insert->currpos += SizeOfXLogRecord;
- freespace -= SizeOfXLogRecord;
-
- /*
- * Append the data, including backup blocks if any
- */
- while (write_len)
- {
- while (rdata->data == NULL)
- rdata = rdata->next;
-
- if (freespace > 0)
- {
- if (rdata->len > freespace)
- {
- memcpy(Insert->currpos, rdata->data, freespace);
- rdata->data += freespace;
- rdata->len -= freespace;
- write_len -= freespace;
- }
- else
- {
- memcpy(Insert->currpos, rdata->data, rdata->len);
- freespace -= rdata->len;
- write_len -= rdata->len;
- Insert->currpos += rdata->len;
- rdata = rdata->next;
- continue;
- }
- }
-
- /* Use next buffer */
- updrqst = AdvanceXLInsertBuffer();
- curridx = Insert->curridx;
- /* Insert cont-record header */
- Insert->currpage->xlp_info |= XLP_FIRST_IS_CONTRECORD;
- contrecord = (XLogContRecord *) Insert->currpos;
- contrecord->xl_rem_len = write_len;
- Insert->currpos += SizeOfXLogContRecord;
- freespace = BLCKSZ - SizeOfXLogPHD - SizeOfXLogContRecord;
- }
-
- /* Ensure next record will be properly aligned */
- Insert->currpos = (char *) Insert->currpage +
- MAXALIGN(Insert->currpos - (char *) Insert->currpage);
- freespace = INSERT_FREESPACE(Insert);
-
- /*
- * The recptr I return is the beginning of the *next* record. This
- * will be stored as LSN for changed data pages...
- */
- INSERT_RECPTR(RecPtr, Insert, curridx);
-
- /* Need to update shared LogwrtRqst if some block was filled up */
- if (freespace < SizeOfXLogRecord)
- updrqst = true; /* curridx is filled and available for
- * writing out */
- else
- curridx = PrevBufIdx(curridx);
- WriteRqst = XLogCtl->xlblocks[curridx];
-
- LWLockRelease(WALInsertLock);
-
- if (updrqst)
- {
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- /* advance global request to include new block(s) */
- if (XLByteLT(xlogctl->LogwrtRqst.Write, WriteRqst))
- xlogctl->LogwrtRqst.Write = WriteRqst;
- /* update local result copy while I have the chance */
- LogwrtResult = xlogctl->LogwrtResult;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
- }
-
- ProcLastRecEnd = RecPtr;
-
- END_CRIT_SECTION();
-
- return (RecPtr);
-}
-
-/*
- * Advance the Insert state to the next buffer page, writing out the next
- * buffer if it still contains unwritten data.
- *
- * The global LogwrtRqst.Write pointer needs to be advanced to include the
- * just-filled page. If we can do this for free (without an extra lock),
- * we do so here. Otherwise the caller must do it. We return TRUE if the
- * request update still needs to be done, FALSE if we did it internally.
- *
- * Must be called with WALInsertLock held.
- */
-static bool
-AdvanceXLInsertBuffer(void)
-{
- XLogCtlInsert *Insert = &XLogCtl->Insert;
- XLogCtlWrite *Write = &XLogCtl->Write;
- uint16 nextidx = NextBufIdx(Insert->curridx);
- bool update_needed = true;
- XLogRecPtr OldPageRqstPtr;
- XLogwrtRqst WriteRqst;
- XLogRecPtr NewPageEndPtr;
- XLogPageHeader NewPage;
-
- /* Use Insert->LogwrtResult copy if it's more fresh */
- if (XLByteLT(LogwrtResult.Write, Insert->LogwrtResult.Write))
- LogwrtResult = Insert->LogwrtResult;
-
- /*
- * Get ending-offset of the buffer page we need to replace (this may
- * be zero if the buffer hasn't been used yet). Fall through if it's
- * already written out.
- */
- OldPageRqstPtr = XLogCtl->xlblocks[nextidx];
- if (!XLByteLE(OldPageRqstPtr, LogwrtResult.Write))
- {
- /* nope, got work to do... */
- XLogRecPtr FinishedPageRqstPtr;
-
- FinishedPageRqstPtr = XLogCtl->xlblocks[Insert->curridx];
-
- /* Before waiting, get info_lck and update LogwrtResult */
- {
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- if (XLByteLT(xlogctl->LogwrtRqst.Write, FinishedPageRqstPtr))
- xlogctl->LogwrtRqst.Write = FinishedPageRqstPtr;
- LogwrtResult = xlogctl->LogwrtResult;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
- }
-
- update_needed = false; /* Did the shared-request update */
-
- if (XLByteLE(OldPageRqstPtr, LogwrtResult.Write))
- {
- /* OK, someone wrote it already */
- Insert->LogwrtResult = LogwrtResult;
- }
- else
- {
- /* Must acquire write lock */
- LWLockAcquire(WALWriteLock, LW_EXCLUSIVE);
- LogwrtResult = Write->LogwrtResult;
- if (XLByteLE(OldPageRqstPtr, LogwrtResult.Write))
- {
- /* OK, someone wrote it already */
- LWLockRelease(WALWriteLock);
- Insert->LogwrtResult = LogwrtResult;
- }
- else
- {
- /*
- * Have to write buffers while holding insert lock. This
- * is not good, so only write as much as we absolutely
- * must.
- */
- WriteRqst.Write = OldPageRqstPtr;
- WriteRqst.Flush.xlogid = 0;
- WriteRqst.Flush.xrecoff = 0;
- XLogWrite(WriteRqst);
- LWLockRelease(WALWriteLock);
- Insert->LogwrtResult = LogwrtResult;
- }
- }
- }
-
- /*
- * Now the next buffer slot is free and we can set it up to be the
- * next output page.
- */
- NewPageEndPtr = XLogCtl->xlblocks[Insert->curridx];
- if (NewPageEndPtr.xrecoff >= XLogFileSize)
- {
- /* crossing a logid boundary */
- NewPageEndPtr.xlogid += 1;
- NewPageEndPtr.xrecoff = BLCKSZ;
- }
- else
- NewPageEndPtr.xrecoff += BLCKSZ;
- XLogCtl->xlblocks[nextidx] = NewPageEndPtr;
- NewPage = (XLogPageHeader) (XLogCtl->pages + nextidx * BLCKSZ);
- Insert->curridx = nextidx;
- Insert->currpage = NewPage;
- Insert->currpos = ((char *) NewPage) + SizeOfXLogPHD;
-
- /*
- * Be sure to re-zero the buffer so that bytes beyond what we've
- * written will look like zeroes and not valid XLOG records...
- */
- MemSet((char *) NewPage, 0, BLCKSZ);
-
- /* And fill the new page's header */
- NewPage->xlp_magic = XLOG_PAGE_MAGIC;
- /* NewPage->xlp_info = 0; */ /* done by memset */
- NewPage->xlp_sui = ThisStartUpID;
- NewPage->xlp_pageaddr.xlogid = NewPageEndPtr.xlogid;
- NewPage->xlp_pageaddr.xrecoff = NewPageEndPtr.xrecoff - BLCKSZ;
-
- return update_needed;
-}
-
-/*
- * Write and/or fsync the log at least as far as WriteRqst indicates.
- *
- * Must be called with WALWriteLock held.
- */
-static void
-XLogWrite(XLogwrtRqst WriteRqst)
-{
- XLogCtlWrite *Write = &XLogCtl->Write;
- char *from;
- bool ispartialpage;
- bool use_existent;
-
- /*
- * Update local LogwrtResult (caller probably did this already,
- * but...)
- */
- LogwrtResult = Write->LogwrtResult;
-
- while (XLByteLT(LogwrtResult.Write, WriteRqst.Write))
- {
- /*
- * Make sure we're not ahead of the insert process. This could
- * happen if we're passed a bogus WriteRqst.Write that is past the
- * end of the last page that's been initialized by
- * AdvanceXLInsertBuffer.
- */
- if (!XLByteLT(LogwrtResult.Write, XLogCtl->xlblocks[Write->curridx]))
- elog(PANIC, "XLogWrite: write request %X/%X is past end of log %X/%X",
- LogwrtResult.Write.xlogid, LogwrtResult.Write.xrecoff,
- XLogCtl->xlblocks[Write->curridx].xlogid,
- XLogCtl->xlblocks[Write->curridx].xrecoff);
-
- /* Advance LogwrtResult.Write to end of current buffer page */
- LogwrtResult.Write = XLogCtl->xlblocks[Write->curridx];
- ispartialpage = XLByteLT(WriteRqst.Write, LogwrtResult.Write);
-
- if (!XLByteInPrevSeg(LogwrtResult.Write, openLogId, openLogSeg))
- {
- /*
- * Switch to new logfile segment.
- */
- if (openLogFile >= 0)
- {
- if (close(openLogFile) != 0)
- elog(PANIC, "close of log file %u, segment %u failed: %m",
- openLogId, openLogSeg);
- openLogFile = -1;
- }
- XLByteToPrevSeg(LogwrtResult.Write, openLogId, openLogSeg);
-
- /* create/use new log file */
- use_existent = true;
- openLogFile = XLogFileInit(openLogId, openLogSeg,
- &use_existent, true);
- openLogOff = 0;
-
- if (!use_existent) /* there was no precreated file */
- elog(LOG, "XLogWrite: new log file created - "
- "consider increasing 'wal_files' in postgresql.conf.");
-
- /* update pg_control, unless someone else already did */
- LWLockAcquire(ControlFileLock, LW_EXCLUSIVE);
- if (ControlFile->logId < openLogId ||
- (ControlFile->logId == openLogId &&
- ControlFile->logSeg < openLogSeg + 1))
- {
- ControlFile->logId = openLogId;
- ControlFile->logSeg = openLogSeg + 1;
- ControlFile->time = time(NULL);
- UpdateControlFile();
-
- /*
- * Signal postmaster to start a checkpoint if it's been
- * too long since the last one. (We look at local copy of
- * RedoRecPtr which might be a little out of date, but
- * should be close enough for this purpose.)
- */
- if (IsUnderPostmaster &&
- (openLogId != RedoRecPtr.xlogid ||
- openLogSeg >= (RedoRecPtr.xrecoff / XLogSegSize) +
- (uint32) CheckPointSegments))
- {
- if (XLOG_DEBUG)
- elog(LOG, "XLogWrite: time for a checkpoint, signaling postmaster");
- SendPostmasterSignal(PMSIGNAL_DO_CHECKPOINT);
- }
- }
- LWLockRelease(ControlFileLock);
- }
-
- if (openLogFile < 0)
- {
- XLByteToPrevSeg(LogwrtResult.Write, openLogId, openLogSeg);
- openLogFile = XLogFileOpen(openLogId, openLogSeg, false);
- openLogOff = 0;
- }
-
- /* Need to seek in the file? */
- if (openLogOff != (LogwrtResult.Write.xrecoff - BLCKSZ) % XLogSegSize)
- {
- openLogOff = (LogwrtResult.Write.xrecoff - BLCKSZ) % XLogSegSize;
- if (lseek(openLogFile, (off_t) openLogOff, SEEK_SET) < 0)
- elog(PANIC, "lseek of log file %u, segment %u, offset %u failed: %m",
- openLogId, openLogSeg, openLogOff);
- }
-
- /* OK to write the page */
- from = XLogCtl->pages + Write->curridx * BLCKSZ;
- errno = 0;
- if (write(openLogFile, from, BLCKSZ) != BLCKSZ)
- {
- /* if write didn't set errno, assume problem is no disk space */
- if (errno == 0)
- errno = ENOSPC;
- elog(PANIC, "write of log file %u, segment %u, offset %u failed: %m",
- openLogId, openLogSeg, openLogOff);
- }
- openLogOff += BLCKSZ;
-
- /*
- * If we just wrote the whole last page of a logfile segment,
- * fsync the segment immediately. This avoids having to go back
- * and re-open prior segments when an fsync request comes along
- * later. Doing it here ensures that one and only one backend will
- * perform this fsync.
- */
- if (openLogOff >= XLogSegSize && !ispartialpage)
- {
- issue_xlog_fsync();
- LogwrtResult.Flush = LogwrtResult.Write; /* end of current page */
- }
-
- if (ispartialpage)
- {
- /* Only asked to write a partial page */
- LogwrtResult.Write = WriteRqst.Write;
- break;
- }
- Write->curridx = NextBufIdx(Write->curridx);
- }
-
- /*
- * If asked to flush, do so
- */
- if (XLByteLT(LogwrtResult.Flush, WriteRqst.Flush) &&
- XLByteLT(LogwrtResult.Flush, LogwrtResult.Write))
- {
- /*
- * Could get here without iterating above loop, in which case we
- * might have no open file or the wrong one. However, we do not
- * need to fsync more than one file.
- */
- if (sync_method != SYNC_METHOD_OPEN)
- {
- if (openLogFile >= 0 &&
- !XLByteInPrevSeg(LogwrtResult.Write, openLogId, openLogSeg))
- {
- if (close(openLogFile) != 0)
- elog(PANIC, "close of log file %u, segment %u failed: %m",
- openLogId, openLogSeg);
- openLogFile = -1;
- }
- if (openLogFile < 0)
- {
- XLByteToPrevSeg(LogwrtResult.Write, openLogId, openLogSeg);
- openLogFile = XLogFileOpen(openLogId, openLogSeg, false);
- openLogOff = 0;
- }
- issue_xlog_fsync();
- }
- LogwrtResult.Flush = LogwrtResult.Write;
- }
-
- /*
- * Update shared-memory status
- *
- * We make sure that the shared 'request' values do not fall behind the
- * 'result' values. This is not absolutely essential, but it saves
- * some code in a couple of places.
- */
- {
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- xlogctl->LogwrtResult = LogwrtResult;
- if (XLByteLT(xlogctl->LogwrtRqst.Write, LogwrtResult.Write))
- xlogctl->LogwrtRqst.Write = LogwrtResult.Write;
- if (XLByteLT(xlogctl->LogwrtRqst.Flush, LogwrtResult.Flush))
- xlogctl->LogwrtRqst.Flush = LogwrtResult.Flush;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
- }
-
- Write->LogwrtResult = LogwrtResult;
-}
-
-/*
- * Ensure that all XLOG data through the given position is flushed to disk.
- *
- * NOTE: this differs from XLogWrite mainly in that the WALWriteLock is not
- * already held, and we try to avoid acquiring it if possible.
- */
-void
-XLogFlush(XLogRecPtr record)
-{
- XLogRecPtr WriteRqstPtr;
- XLogwrtRqst WriteRqst;
-
- if (XLOG_DEBUG)
- {
- elog(LOG, "XLogFlush%s%s: request %X/%X; write %X/%X; flush %X/%X\n",
- (IsBootstrapProcessingMode()) ? "(bootstrap)" : "",
- (InRedo) ? "(redo)" : "",
- record.xlogid, record.xrecoff,
- LogwrtResult.Write.xlogid, LogwrtResult.Write.xrecoff,
- LogwrtResult.Flush.xlogid, LogwrtResult.Flush.xrecoff);
- fflush(stderr);
- }
-
- /* Disabled during REDO */
- if (InRedo)
- return;
-
- /* Quick exit if already known flushed */
- if (XLByteLE(record, LogwrtResult.Flush))
- return;
-
- START_CRIT_SECTION();
-
- /*
- * Since fsync is usually a horribly expensive operation, we try to
- * piggyback as much data as we can on each fsync: if we see any more
- * data entered into the xlog buffer, we'll write and fsync that too,
- * so that the final value of LogwrtResult.Flush is as large as
- * possible. This gives us some chance of avoiding another fsync
- * immediately after.
- */
-
- /* initialize to given target; may increase below */
- WriteRqstPtr = record;
-
- /* read LogwrtResult and update local state */
- {
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- if (XLByteLT(WriteRqstPtr, xlogctl->LogwrtRqst.Write))
- WriteRqstPtr = xlogctl->LogwrtRqst.Write;
- LogwrtResult = xlogctl->LogwrtResult;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
- }
-
- /* done already? */
- if (!XLByteLE(record, LogwrtResult.Flush))
- {
- /* if something was added to log cache then try to flush this too */
- if (LWLockConditionalAcquire(WALInsertLock, LW_EXCLUSIVE))
- {
- XLogCtlInsert *Insert = &XLogCtl->Insert;
- uint32 freespace = INSERT_FREESPACE(Insert);
-
- if (freespace < SizeOfXLogRecord) /* buffer is full */
- WriteRqstPtr = XLogCtl->xlblocks[Insert->curridx];
- else
- {
- WriteRqstPtr = XLogCtl->xlblocks[Insert->curridx];
- WriteRqstPtr.xrecoff -= freespace;
- }
- LWLockRelease(WALInsertLock);
- }
- /* now wait for the write lock */
- LWLockAcquire(WALWriteLock, LW_EXCLUSIVE);
- LogwrtResult = XLogCtl->Write.LogwrtResult;
- if (!XLByteLE(record, LogwrtResult.Flush))
- {
- WriteRqst.Write = WriteRqstPtr;
- WriteRqst.Flush = record;
- XLogWrite(WriteRqst);
- }
- LWLockRelease(WALWriteLock);
- }
-
- END_CRIT_SECTION();
-
- /*
- * If we still haven't flushed to the request point then we have a
- * problem; most likely, the requested flush point is past end of XLOG.
- * This has been seen to occur when a disk page has a corrupted LSN.
- *
- * Formerly we treated this as a PANIC condition, but that hurts the
- * system's robustness rather than helping it: we do not want to take
- * down the whole system due to corruption on one data page. In
- * particular, if the bad page is encountered again during recovery then
- * we would be unable to restart the database at all! (This scenario
- * has actually happened in the field several times with 7.1 releases.
- * Note that we cannot get here while InRedo is true, but if the bad
- * page is brought in and marked dirty during recovery then
- * CreateCheckpoint will try to flush it at the end of recovery.)
- *
- * The current approach is to ERROR under normal conditions, but only
- * WARNING during recovery, so that the system can be brought up even if
- * there's a corrupt LSN. Note that for calls from xact.c, the ERROR
- * will be promoted to PANIC since xact.c calls this routine inside a
- * critical section. However, calls from bufmgr.c are not within
- * critical sections and so we will not force a restart for a bad LSN
- * on a data page.
- */
- if (XLByteLT(LogwrtResult.Flush, record))
- elog(InRecovery ? WARNING : ERROR,
- "XLogFlush: request %X/%X is not satisfied --- flushed only to %X/%X",
- record.xlogid, record.xrecoff,
- LogwrtResult.Flush.xlogid, LogwrtResult.Flush.xrecoff);
-}
-
-/*
- * Create a new XLOG file segment, or open a pre-existing one.
- *
- * log, seg: identify segment to be created/opened.
- *
- * *use_existent: if TRUE, OK to use a pre-existing file (else, any
- * pre-existing file will be deleted). On return, TRUE if a pre-existing
- * file was used.
- *
- * use_lock: if TRUE, acquire ControlFileLock while moving file into
- * place. This should be TRUE except during bootstrap log creation. The
- * caller must *not* hold the lock at call.
- *
- * Returns FD of opened file.
- */
-static int
-XLogFileInit(uint32 log, uint32 seg,
- bool *use_existent, bool use_lock)
-{
- char path[MAXPGPATH];
- char tmppath[MAXPGPATH];
- char zbuffer[BLCKSZ];
- int fd;
- int nbytes;
-
- XLogFileName(path, log, seg);
-
- /*
- * Try to use existent file (checkpoint maker may have created it
- * already)
- */
- if (*use_existent)
- {
- fd = BasicOpenFile(path, O_RDWR | PG_BINARY | XLOG_SYNC_BIT,
- S_IRUSR | S_IWUSR);
- if (fd < 0)
- {
- if (errno != ENOENT)
- elog(PANIC, "open of %s (log file %u, segment %u) failed: %m",
- path, log, seg);
- }
- else
- return (fd);
- }
-
- /*
- * Initialize an empty (all zeroes) segment. NOTE: it is possible
- * that another process is doing the same thing. If so, we will end
- * up pre-creating an extra log segment. That seems OK, and better
- * than holding the lock throughout this lengthy process.
- */
- snprintf(tmppath, MAXPGPATH, "%s/xlogtemp.%d",
- XLogDir, (int) getpid());
-
- unlink(tmppath);
-
- /* do not use XLOG_SYNC_BIT here --- want to fsync only at end of fill */
- fd = BasicOpenFile(tmppath, O_RDWR | O_CREAT | O_EXCL | PG_BINARY,
- S_IRUSR | S_IWUSR);
- if (fd < 0)
- elog(PANIC, "creation of file %s failed: %m", tmppath);
-
- /*
- * Zero-fill the file. We have to do this the hard way to ensure that
- * all the file space has really been allocated --- on platforms that
- * allow "holes" in files, just seeking to the end doesn't allocate
- * intermediate space. This way, we know that we have all the space
- * and (after the fsync below) that all the indirect blocks are down
- * on disk. Therefore, fdatasync(2) or O_DSYNC will be sufficient to
- * sync future writes to the log file.
- */
- MemSet(zbuffer, 0, sizeof(zbuffer));
- for (nbytes = 0; nbytes < XLogSegSize; nbytes += sizeof(zbuffer))
- {
- errno = 0;
- if ((int) write(fd, zbuffer, sizeof(zbuffer)) != (int) sizeof(zbuffer))
- {
- int save_errno = errno;
-
- /*
- * If we fail to make the file, delete it to release disk
- * space
- */
- unlink(tmppath);
- /* if write didn't set errno, assume problem is no disk space */
- errno = save_errno ? save_errno : ENOSPC;
-
- elog(PANIC, "ZeroFill failed to write %s: %m", tmppath);
- }
- }
-
- if (pg_fsync(fd) != 0)
- elog(PANIC, "fsync of file %s failed: %m", tmppath);
-
- close(fd);
-
- /*
- * Now move the segment into place with its final name.
- *
- * If caller didn't want to use a pre-existing file, get rid of any
- * pre-existing file. Otherwise, cope with possibility that someone
- * else has created the file while we were filling ours: if so, use
- * ours to pre-create a future log segment.
- */
- if (!InstallXLogFileSegment(log, seg, tmppath,
- *use_existent, XLOGfiles + XLOGfileslop,
- use_lock))
- {
- /* No need for any more future segments... */
- unlink(tmppath);
- }
-
- /* Set flag to tell caller there was no existent file */
- *use_existent = false;
-
- /* Now open original target segment (might not be file I just made) */
- fd = BasicOpenFile(path, O_RDWR | PG_BINARY | XLOG_SYNC_BIT,
- S_IRUSR | S_IWUSR);
- if (fd < 0)
- elog(PANIC, "open of %s (log file %u, segment %u) failed: %m",
- path, log, seg);
-
- return (fd);
-}
-
-/*
- * Install a new XLOG segment file as a current or future log segment.
- *
- * This is used both to install a newly-created segment (which has a temp
- * filename while it's being created) and to recycle an old segment.
- *
- * log, seg: identify segment to install as (or first possible target).
- *
- * tmppath: initial name of file to install. It will be renamed into place.
- *
- * find_free: if TRUE, install the new segment at the first empty log/seg
- * number at or after the passed numbers. If FALSE, install the new segment
- * exactly where specified, deleting any existing segment file there.
- *
- * max_advance: maximum number of log/seg slots to advance past the starting
- * point. Fail if no free slot is found in this range. (Irrelevant if
- * find_free is FALSE.)
- *
- * use_lock: if TRUE, acquire ControlFileLock while moving file into
- * place. This should be TRUE except during bootstrap log creation. The
- * caller must *not* hold the lock at call.
- *
- * Returns TRUE if file installed, FALSE if not installed because of
- * exceeding max_advance limit. (Any other kind of failure causes elog().)
- */
-static bool
-InstallXLogFileSegment(uint32 log, uint32 seg, char *tmppath,
- bool find_free, int max_advance,
- bool use_lock)
-{
- char path[MAXPGPATH];
- int fd;
-
- XLogFileName(path, log, seg);
-
- /*
- * We want to be sure that only one process does this at a time.
- */
- if (use_lock)
- LWLockAcquire(ControlFileLock, LW_EXCLUSIVE);
-
- if (!find_free)
- {
- /* Force installation: get rid of any pre-existing segment file */
- unlink(path);
- }
- else
- {
- /* Find a free slot to put it in */
- while ((fd = BasicOpenFile(path, O_RDWR | PG_BINARY,
- S_IRUSR | S_IWUSR)) >= 0)
- {
- close(fd);
- if (--max_advance < 0)
- {
- /* Failed to find a free slot within specified range */
- if (use_lock)
- LWLockRelease(ControlFileLock);
- return false;
- }
- NextLogSeg(log, seg);
- XLogFileName(path, log, seg);
- }
- }
-
- /*
- * Prefer link() to rename() here just to be really sure that we don't
- * overwrite an existing logfile. However, there shouldn't be one, so
- * rename() is an acceptable substitute except for the truly paranoid.
- */
-#if !defined(__BEOS__) && !defined(N_PLAT_NLM) && !defined(__CYGWIN__)
- if (link(tmppath, path) < 0)
- elog(PANIC, "link from %s to %s (initialization of log file %u, segment %u) failed: %m",
- tmppath, path, log, seg);
- unlink(tmppath);
-#else
- if (rename(tmppath, path) < 0)
- elog(PANIC, "rename from %s to %s (initialization of log file %u, segment %u) failed: %m",
- tmppath, path, log, seg);
-#endif
-
- if (use_lock)
- LWLockRelease(ControlFileLock);
-
- return true;
-}
-
-/*
- * Open a pre-existing logfile segment.
- */
-static int
-XLogFileOpen(uint32 log, uint32 seg, bool econt)
-{
- char path[MAXPGPATH];
- int fd;
-
- XLogFileName(path, log, seg);
-
- fd = BasicOpenFile(path, O_RDWR | PG_BINARY | XLOG_SYNC_BIT,
- S_IRUSR | S_IWUSR);
- if (fd < 0)
- {
- if (econt && errno == ENOENT)
- {
- elog(LOG, "open of %s (log file %u, segment %u) failed: %m",
- path, log, seg);
- return (fd);
- }
- elog(PANIC, "open of %s (log file %u, segment %u) failed: %m",
- path, log, seg);
- }
-
- return (fd);
-}
-
-/*
- * Preallocate log files beyond the specified log endpoint, according to
- * the XLOGfile user parameter.
- */
-static void
-PreallocXlogFiles(XLogRecPtr endptr)
-{
- uint32 _logId;
- uint32 _logSeg;
- int lf;
- bool use_existent;
- int i;
-
- XLByteToPrevSeg(endptr, _logId, _logSeg);
- if (XLOGfiles > 0)
- {
- for (i = 1; i <= XLOGfiles; i++)
- {
- NextLogSeg(_logId, _logSeg);
- use_existent = true;
- lf = XLogFileInit(_logId, _logSeg, &use_existent, true);
- close(lf);
- }
- }
- else if ((endptr.xrecoff - 1) % XLogSegSize >=
- (uint32) (0.75 * XLogSegSize))
- {
- NextLogSeg(_logId, _logSeg);
- use_existent = true;
- lf = XLogFileInit(_logId, _logSeg, &use_existent, true);
- close(lf);
- }
-}
-
-/*
- * Remove or move offline all log files older or equal to passed log/seg#
- *
- * endptr is current (or recent) end of xlog; this is used to determine
- * whether we want to recycle rather than delete no-longer-wanted log files.
- */
-static void
-MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr)
-{
- uint32 endlogId;
- uint32 endlogSeg;
- DIR *xldir;
- struct dirent *xlde;
- char lastoff[32];
- char path[MAXPGPATH];
-
- XLByteToPrevSeg(endptr, endlogId, endlogSeg);
-
- xldir = opendir(XLogDir);
- if (xldir == NULL)
- elog(PANIC, "could not open transaction log directory (%s): %m",
- XLogDir);
-
- sprintf(lastoff, "%08X%08X", log, seg);
-
- errno = 0;
- while ((xlde = readdir(xldir)) != NULL)
- {
- if (strlen(xlde->d_name) == 16 &&
- strspn(xlde->d_name, "0123456789ABCDEF") == 16 &&
- strcmp(xlde->d_name, lastoff) <= 0)
- {
- snprintf(path, MAXPGPATH, "%s/%s", XLogDir, xlde->d_name);
- if (XLOG_archive_dir[0])
- {
- elog(LOG, "archiving transaction log file %s",
- xlde->d_name);
- elog(WARNING, "archiving log files is not implemented!");
- }
- else
- {
- /*
- * Before deleting the file, see if it can be recycled as
- * a future log segment. We allow recycling segments up
- * to XLOGfiles + XLOGfileslop segments beyond the current
- * XLOG location.
- */
- if (InstallXLogFileSegment(endlogId, endlogSeg, path,
- true, XLOGfiles + XLOGfileslop,
- true))
- {
- elog(LOG, "recycled transaction log file %s",
- xlde->d_name);
- }
- else
- {
- /* No need for any more future segments... */
- elog(LOG, "removing transaction log file %s",
- xlde->d_name);
- unlink(path);
- }
- }
- }
- errno = 0;
- }
- if (errno)
- elog(PANIC, "could not read transaction log directory (%s): %m",
- XLogDir);
- closedir(xldir);
-}
-
-/*
- * Restore the backup blocks present in an XLOG record, if any.
- *
- * We assume all of the record has been read into memory at *record.
- */
-static void
-RestoreBkpBlocks(XLogRecord *record, XLogRecPtr lsn)
-{
- Relation reln;
- Buffer buffer;
- Page page;
- BkpBlock bkpb;
- char *blk;
- int i;
-
- blk = (char *) XLogRecGetData(record) + record->xl_len;
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (!(record->xl_info & XLR_SET_BKP_BLOCK(i)))
- continue;
-
- memcpy((char *) &bkpb, blk, sizeof(BkpBlock));
- blk += sizeof(BkpBlock);
-
- reln = XLogOpenRelation(true, record->xl_rmid, bkpb.node);
-
- if (reln)
- {
- buffer = XLogReadBuffer(true, reln, bkpb.block);
- if (BufferIsValid(buffer))
- {
- page = (Page) BufferGetPage(buffer);
- memcpy((char *) page, blk, BLCKSZ);
- PageSetLSN(page, lsn);
- PageSetSUI(page, ThisStartUpID);
- UnlockAndWriteBuffer(buffer);
- }
- }
-
- blk += BLCKSZ;
- }
-}
-
-/*
- * CRC-check an XLOG record. We do not believe the contents of an XLOG
- * record (other than to the minimal extent of computing the amount of
- * data to read in) until we've checked the CRCs.
- *
- * We assume all of the record has been read into memory at *record.
- */
-static bool
-RecordIsValid(XLogRecord *record, XLogRecPtr recptr, int emode)
-{
- crc64 crc;
- crc64 cbuf;
- int i;
- uint32 len = record->xl_len;
- char *blk;
-
- /* Check CRC of rmgr data and record header */
- INIT_CRC64(crc);
- COMP_CRC64(crc, XLogRecGetData(record), len);
- COMP_CRC64(crc, (char *) record + sizeof(crc64),
- SizeOfXLogRecord - sizeof(crc64));
- FIN_CRC64(crc);
-
- if (!EQ_CRC64(record->xl_crc, crc))
- {
- elog(emode, "ReadRecord: bad resource manager data checksum in record at %X/%X",
- recptr.xlogid, recptr.xrecoff);
- return (false);
- }
-
- /* Check CRCs of backup blocks, if any */
- blk = (char *) XLogRecGetData(record) + len;
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (!(record->xl_info & XLR_SET_BKP_BLOCK(i)))
- continue;
-
- INIT_CRC64(crc);
- COMP_CRC64(crc, blk + sizeof(BkpBlock), BLCKSZ);
- COMP_CRC64(crc, blk + sizeof(crc64),
- sizeof(BkpBlock) - sizeof(crc64));
- FIN_CRC64(crc);
- memcpy((char *) &cbuf, blk, sizeof(crc64)); /* don't assume
- * alignment */
-
- if (!EQ_CRC64(cbuf, crc))
- {
- elog(emode, "ReadRecord: bad checksum of backup block %d in record at %X/%X",
- i + 1, recptr.xlogid, recptr.xrecoff);
- return (false);
- }
- blk += sizeof(BkpBlock) + BLCKSZ;
- }
-
- return (true);
-}
-
-/*
- * Attempt to read an XLOG record.
- *
- * If RecPtr is not NULL, try to read a record at that position. Otherwise
- * try to read a record just after the last one previously read.
- *
- * If no valid record is available, returns NULL, or fails if emode is PANIC.
- * (emode must be either PANIC or LOG.)
- *
- * buffer is a workspace at least _INTL_MAXLOGRECSZ bytes long. It is needed
- * to reassemble a record that crosses block boundaries. Note that on
- * successful return, the returned record pointer always points at buffer.
- */
-static XLogRecord *
-ReadRecord(XLogRecPtr *RecPtr, int emode, char *buffer)
-{
- XLogRecord *record;
- XLogRecPtr tmpRecPtr = EndRecPtr;
- uint32 len,
- total_len;
- uint32 targetPageOff;
- unsigned i;
- bool nextmode = false;
-
- if (readBuf == NULL)
- {
- /*
- * First time through, permanently allocate readBuf. We do it
- * this way, rather than just making a static array, for two
- * reasons: (1) no need to waste the storage in most
- * instantiations of the backend; (2) a static char array isn't
- * guaranteed to have any particular alignment, whereas malloc()
- * will provide MAXALIGN'd storage.
- */
- readBuf = (char *) malloc(BLCKSZ);
- Assert(readBuf != NULL);
- }
-
- if (RecPtr == NULL)
- {
- RecPtr = &tmpRecPtr;
- nextmode = true;
- /* fast case if next record is on same page */
- if (nextRecord != NULL)
- {
- record = nextRecord;
- goto got_record;
- }
- /* align old recptr to next page */
- if (tmpRecPtr.xrecoff % BLCKSZ != 0)
- tmpRecPtr.xrecoff += (BLCKSZ - tmpRecPtr.xrecoff % BLCKSZ);
- if (tmpRecPtr.xrecoff >= XLogFileSize)
- {
- (tmpRecPtr.xlogid)++;
- tmpRecPtr.xrecoff = 0;
- }
- tmpRecPtr.xrecoff += SizeOfXLogPHD;
- }
- else if (!XRecOffIsValid(RecPtr->xrecoff))
- elog(PANIC, "ReadRecord: invalid record offset at %X/%X",
- RecPtr->xlogid, RecPtr->xrecoff);
-
- if (readFile >= 0 && !XLByteInSeg(*RecPtr, readId, readSeg))
- {
- close(readFile);
- readFile = -1;
- }
- XLByteToSeg(*RecPtr, readId, readSeg);
- if (readFile < 0)
- {
- readFile = XLogFileOpen(readId, readSeg, (emode == LOG));
- if (readFile < 0)
- goto next_record_is_invalid;
- readOff = (uint32) (-1); /* force read to occur below */
- }
-
- targetPageOff = ((RecPtr->xrecoff % XLogSegSize) / BLCKSZ) * BLCKSZ;
- if (readOff != targetPageOff)
- {
- readOff = targetPageOff;
- if (lseek(readFile, (off_t) readOff, SEEK_SET) < 0)
- {
- elog(emode, "ReadRecord: lseek of log file %u, segment %u, offset %u failed: %m",
- readId, readSeg, readOff);
- goto next_record_is_invalid;
- }
- if (read(readFile, readBuf, BLCKSZ) != BLCKSZ)
- {
- elog(emode, "ReadRecord: read of log file %u, segment %u, offset %u failed: %m",
- readId, readSeg, readOff);
- goto next_record_is_invalid;
- }
- if (!ValidXLOGHeader((XLogPageHeader) readBuf, emode, nextmode))
- goto next_record_is_invalid;
- }
- if ((((XLogPageHeader) readBuf)->xlp_info & XLP_FIRST_IS_CONTRECORD) &&
- RecPtr->xrecoff % BLCKSZ == SizeOfXLogPHD)
- {
- elog(emode, "ReadRecord: contrecord is requested by %X/%X",
- RecPtr->xlogid, RecPtr->xrecoff);
- goto next_record_is_invalid;
- }
- record = (XLogRecord *) ((char *) readBuf + RecPtr->xrecoff % BLCKSZ);
-
-got_record:;
-
- /*
- * Currently, xl_len == 0 must be bad data, but that might not be true
- * forever. See note in XLogInsert.
- */
- if (record->xl_len == 0)
- {
- elog(emode, "ReadRecord: record with zero length at %X/%X",
- RecPtr->xlogid, RecPtr->xrecoff);
- goto next_record_is_invalid;
- }
-
- /*
- * Compute total length of record including any appended backup
- * blocks.
- */
- total_len = SizeOfXLogRecord + record->xl_len;
- for (i = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (!(record->xl_info & XLR_SET_BKP_BLOCK(i)))
- continue;
- total_len += sizeof(BkpBlock) + BLCKSZ;
- }
-
- /*
- * Make sure it will fit in buffer (currently, it is mechanically
- * impossible for this test to fail, but it seems like a good idea
- * anyway).
- */
- if (total_len > _INTL_MAXLOGRECSZ)
- {
- elog(emode, "ReadRecord: record length %u at %X/%X too long",
- total_len, RecPtr->xlogid, RecPtr->xrecoff);
- goto next_record_is_invalid;
- }
- if (record->xl_rmid > RM_MAX_ID)
- {
- elog(emode, "ReadRecord: invalid resource manager id %u at %X/%X",
- record->xl_rmid, RecPtr->xlogid, RecPtr->xrecoff);
- goto next_record_is_invalid;
- }
- nextRecord = NULL;
- len = BLCKSZ - RecPtr->xrecoff % BLCKSZ;
- if (total_len > len)
- {
- /* Need to reassemble record */
- XLogContRecord *contrecord;
- uint32 gotlen = len;
-
- memcpy(buffer, record, len);
- record = (XLogRecord *) buffer;
- buffer += len;
- for (;;)
- {
- readOff += BLCKSZ;
- if (readOff >= XLogSegSize)
- {
- close(readFile);
- readFile = -1;
- NextLogSeg(readId, readSeg);
- readFile = XLogFileOpen(readId, readSeg, (emode == LOG));
- if (readFile < 0)
- goto next_record_is_invalid;
- readOff = 0;
- }
- if (read(readFile, readBuf, BLCKSZ) != BLCKSZ)
- {
- elog(emode, "ReadRecord: read of log file %u, segment %u, offset %u failed: %m",
- readId, readSeg, readOff);
- goto next_record_is_invalid;
- }
- if (!ValidXLOGHeader((XLogPageHeader) readBuf, emode, true))
- goto next_record_is_invalid;
- if (!(((XLogPageHeader) readBuf)->xlp_info & XLP_FIRST_IS_CONTRECORD))
- {
- elog(emode, "ReadRecord: there is no ContRecord flag in log file %u, segment %u, offset %u",
- readId, readSeg, readOff);
- goto next_record_is_invalid;
- }
- contrecord = (XLogContRecord *) ((char *) readBuf + SizeOfXLogPHD);
- if (contrecord->xl_rem_len == 0 ||
- total_len != (contrecord->xl_rem_len + gotlen))
- {
- elog(emode, "ReadRecord: invalid ContRecord length %u in log file %u, segment %u, offset %u",
- contrecord->xl_rem_len, readId, readSeg, readOff);
- goto next_record_is_invalid;
- }
- len = BLCKSZ - SizeOfXLogPHD - SizeOfXLogContRecord;
- if (contrecord->xl_rem_len > len)
- {
- memcpy(buffer, (char *) contrecord + SizeOfXLogContRecord, len);
- gotlen += len;
- buffer += len;
- continue;
- }
- memcpy(buffer, (char *) contrecord + SizeOfXLogContRecord,
- contrecord->xl_rem_len);
- break;
- }
- if (!RecordIsValid(record, *RecPtr, emode))
- goto next_record_is_invalid;
- if (BLCKSZ - SizeOfXLogRecord >= SizeOfXLogPHD +
- SizeOfXLogContRecord + MAXALIGN(contrecord->xl_rem_len))
- {
- nextRecord = (XLogRecord *) ((char *) contrecord +
- SizeOfXLogContRecord + MAXALIGN(contrecord->xl_rem_len));
- }
- EndRecPtr.xlogid = readId;
- EndRecPtr.xrecoff = readSeg * XLogSegSize + readOff +
- SizeOfXLogPHD + SizeOfXLogContRecord +
- MAXALIGN(contrecord->xl_rem_len);
- ReadRecPtr = *RecPtr;
- return record;
- }
-
- /* Record does not cross a page boundary */
- if (!RecordIsValid(record, *RecPtr, emode))
- goto next_record_is_invalid;
- if (BLCKSZ - SizeOfXLogRecord >= RecPtr->xrecoff % BLCKSZ +
- MAXALIGN(total_len))
- nextRecord = (XLogRecord *) ((char *) record + MAXALIGN(total_len));
- EndRecPtr.xlogid = RecPtr->xlogid;
- EndRecPtr.xrecoff = RecPtr->xrecoff + MAXALIGN(total_len);
- ReadRecPtr = *RecPtr;
- memcpy(buffer, record, total_len);
- return (XLogRecord *) buffer;
-
-next_record_is_invalid:;
- close(readFile);
- readFile = -1;
- nextRecord = NULL;
- return NULL;
-}
-
-/*
- * Check whether the xlog header of a page just read in looks valid.
- *
- * This is just a convenience subroutine to avoid duplicated code in
- * ReadRecord. It's not intended for use from anywhere else.
- */
-static bool
-ValidXLOGHeader(XLogPageHeader hdr, int emode, bool checkSUI)
-{
- XLogRecPtr recaddr;
-
- if (hdr->xlp_magic != XLOG_PAGE_MAGIC)
- {
- elog(emode, "ReadRecord: invalid magic number %04X in log file %u, segment %u, offset %u",
- hdr->xlp_magic, readId, readSeg, readOff);
- return false;
- }
- if ((hdr->xlp_info & ~XLP_ALL_FLAGS) != 0)
- {
- elog(emode, "ReadRecord: invalid info bits %04X in log file %u, segment %u, offset %u",
- hdr->xlp_info, readId, readSeg, readOff);
- return false;
- }
- recaddr.xlogid = readId;
- recaddr.xrecoff = readSeg * XLogSegSize + readOff;
- if (!XLByteEQ(hdr->xlp_pageaddr, recaddr))
- {
- elog(emode, "ReadRecord: unexpected pageaddr %X/%X in log file %u, segment %u, offset %u",
- hdr->xlp_pageaddr.xlogid, hdr->xlp_pageaddr.xrecoff,
- readId, readSeg, readOff);
- return false;
- }
-
- /*
- * We disbelieve a SUI less than the previous page's SUI, or more than
- * a few counts greater. In theory as many as 512 shutdown checkpoint
- * records could appear on a 32K-sized xlog page, so that's the most
- * differential there could legitimately be.
- *
- * Note this check can only be applied when we are reading the next page
- * in sequence, so ReadRecord passes a flag indicating whether to
- * check.
- */
- if (checkSUI)
- {
- if (hdr->xlp_sui < lastReadSUI ||
- hdr->xlp_sui > lastReadSUI + 512)
- {
- /* translator: SUI = startup id */
- elog(emode, "ReadRecord: out-of-sequence SUI %u (after %u) in log file %u, segment %u, offset %u",
- hdr->xlp_sui, lastReadSUI, readId, readSeg, readOff);
- return false;
- }
- }
- lastReadSUI = hdr->xlp_sui;
- return true;
-}
-
-/*
- * I/O routines for pg_control
- *
- * *ControlFile is a buffer in shared memory that holds an image of the
- * contents of pg_control. WriteControlFile() initializes pg_control
- * given a preloaded buffer, ReadControlFile() loads the buffer from
- * the pg_control file (during postmaster or standalone-backend startup),
- * and UpdateControlFile() rewrites pg_control after we modify xlog state.
- *
- * For simplicity, WriteControlFile() initializes the fields of pg_control
- * that are related to checking backend/database compatibility, and
- * ReadControlFile() verifies they are correct. We could split out the
- * I/O and compatibility-check functions, but there seems no need currently.
- */
-
-void
-XLOGPathInit(void)
-{
- /* Init XLOG file paths */
- snprintf(XLogDir, MAXPGPATH, "%s/pg_xlog", DataDir);
- snprintf(ControlFilePath, MAXPGPATH, "%s/global/pg_control", DataDir);
-}
-
-static void
-WriteControlFile(void)
-{
- int fd;
- char buffer[BLCKSZ]; /* need not be aligned */
- char *localeptr;
-
- /*
- * Initialize version and compatibility-check fields
- */
- ControlFile->pg_control_version = PG_CONTROL_VERSION;
- ControlFile->catalog_version_no = CATALOG_VERSION_NO;
- ControlFile->blcksz = BLCKSZ;
- ControlFile->relseg_size = RELSEG_SIZE;
-
- ControlFile->nameDataLen = NAMEDATALEN;
- ControlFile->funcMaxArgs = FUNC_MAX_ARGS;
-
-#ifdef HAVE_INT64_TIMESTAMP
- ControlFile->enableIntTimes = TRUE;
-#else
- ControlFile->enableIntTimes = FALSE;
-#endif
-
- ControlFile->localeBuflen = LOCALE_NAME_BUFLEN;
- localeptr = setlocale(LC_COLLATE, NULL);
- if (!localeptr)
- elog(PANIC, "invalid LC_COLLATE setting");
- StrNCpy(ControlFile->lc_collate, localeptr, LOCALE_NAME_BUFLEN);
- localeptr = setlocale(LC_CTYPE, NULL);
- if (!localeptr)
- elog(PANIC, "invalid LC_CTYPE setting");
- StrNCpy(ControlFile->lc_ctype, localeptr, LOCALE_NAME_BUFLEN);
-
- /* Contents are protected with a CRC */
- INIT_CRC64(ControlFile->crc);
- COMP_CRC64(ControlFile->crc,
- (char *) ControlFile + sizeof(crc64),
- sizeof(ControlFileData) - sizeof(crc64));
- FIN_CRC64(ControlFile->crc);
-
- /*
- * We write out BLCKSZ bytes into pg_control, zero-padding the excess
- * over sizeof(ControlFileData). This reduces the odds of
- * premature-EOF errors when reading pg_control. We'll still fail
- * when we check the contents of the file, but hopefully with a more
- * specific error than "couldn't read pg_control".
- */
- if (sizeof(ControlFileData) > BLCKSZ)
- elog(PANIC, "sizeof(ControlFileData) is larger than BLCKSZ; fix either one");
-
- memset(buffer, 0, BLCKSZ);
- memcpy(buffer, ControlFile, sizeof(ControlFileData));
-
- fd = BasicOpenFile(ControlFilePath, O_RDWR | O_CREAT | O_EXCL | PG_BINARY,
- S_IRUSR | S_IWUSR);
- if (fd < 0)
- elog(PANIC, "WriteControlFile: could not create control file (%s): %m",
- ControlFilePath);
-
- errno = 0;
- if (write(fd, buffer, BLCKSZ) != BLCKSZ)
- {
- /* if write didn't set errno, assume problem is no disk space */
- if (errno == 0)
- errno = ENOSPC;
- elog(PANIC, "WriteControlFile: write to control file failed: %m");
- }
-
- if (pg_fsync(fd) != 0)
- elog(PANIC, "WriteControlFile: fsync of control file failed: %m");
-
- close(fd);
-}
-
-static void
-ReadControlFile(void)
-{
- crc64 crc;
- int fd;
-
- /*
- * Read data...
- */
- fd = BasicOpenFile(ControlFilePath, O_RDWR | PG_BINARY, S_IRUSR | S_IWUSR);
- if (fd < 0)
- elog(PANIC, "could not open control file (%s): %m", ControlFilePath);
-
- if (read(fd, ControlFile, sizeof(ControlFileData)) != sizeof(ControlFileData))
- elog(PANIC, "read from control file failed: %m");
-
- close(fd);
-
- /*
- * Check for expected pg_control format version. If this is wrong,
- * the CRC check will likely fail because we'll be checking the wrong
- * number of bytes. Complaining about wrong version will probably be
- * more enlightening than complaining about wrong CRC.
- */
- if (ControlFile->pg_control_version != PG_CONTROL_VERSION)
- elog(PANIC,
- "The database cluster was initialized with PG_CONTROL_VERSION %d,\n"
- "\tbut the server was compiled with PG_CONTROL_VERSION %d.\n"
- "\tIt looks like you need to initdb.",
- ControlFile->pg_control_version, PG_CONTROL_VERSION);
-
- /* Now check the CRC. */
- INIT_CRC64(crc);
- COMP_CRC64(crc,
- (char *) ControlFile + sizeof(crc64),
- sizeof(ControlFileData) - sizeof(crc64));
- FIN_CRC64(crc);
-
- if (!EQ_CRC64(crc, ControlFile->crc))
- elog(PANIC, "invalid checksum in control file");
-
- /*
- * Do compatibility checking immediately. We do this here for 2
- * reasons:
- *
- * (1) if the database isn't compatible with the backend executable, we
- * want to abort before we can possibly do any damage;
- *
- * (2) this code is executed in the postmaster, so the setlocale() will
- * propagate to forked backends, which aren't going to read this file
- * for themselves. (These locale settings are considered critical
- * compatibility items because they can affect sort order of indexes.)
- */
- if (ControlFile->catalog_version_no != CATALOG_VERSION_NO)
- elog(PANIC,
- "The database cluster was initialized with CATALOG_VERSION_NO %d,\n"
- "\tbut the backend was compiled with CATALOG_VERSION_NO %d.\n"
- "\tIt looks like you need to initdb.",
- ControlFile->catalog_version_no, CATALOG_VERSION_NO);
- if (ControlFile->blcksz != BLCKSZ)
- elog(PANIC,
- "The database cluster was initialized with BLCKSZ %d,\n"
- "\tbut the backend was compiled with BLCKSZ %d.\n"
- "\tIt looks like you need to initdb.",
- ControlFile->blcksz, BLCKSZ);
- if (ControlFile->relseg_size != RELSEG_SIZE)
- elog(PANIC,
- "The database cluster was initialized with RELSEG_SIZE %d,\n"
- "\tbut the backend was compiled with RELSEG_SIZE %d.\n"
- "\tIt looks like you need to recompile or initdb.",
- ControlFile->relseg_size, RELSEG_SIZE);
-
- if (ControlFile->nameDataLen != NAMEDATALEN)
- elog(PANIC,
- "The database cluster was initialized with NAMEDATALEN %d,\n"
- "\tbut the backend was compiled with NAMEDATALEN %d.\n"
- "\tIt looks like you need to recompile or initdb.",
- ControlFile->nameDataLen, NAMEDATALEN);
-
- if (ControlFile->funcMaxArgs != FUNC_MAX_ARGS)
- elog(PANIC,
- "The database cluster was initialized with FUNC_MAX_ARGS %d,\n"
- "\tbut the backend was compiled with FUNC_MAX_ARGS %d.\n"
- "\tIt looks like you need to recompile or initdb.",
- ControlFile->funcMaxArgs, FUNC_MAX_ARGS);
-
-#ifdef HAVE_INT64_TIMESTAMP
- if (ControlFile->enableIntTimes != TRUE)
- elog(PANIC,
- "The database cluster was initialized without HAVE_INT64_TIMESTAMP\n"
- "\tbut the backend was compiled with HAVE_INT64_TIMESTAMP.\n"
- "\tIt looks like you need to recompile or initdb.");
-#else
- if (ControlFile->enableIntTimes != FALSE)
- elog(PANIC,
- "The database cluster was initialized with HAVE_INT64_TIMESTAMP\n"
- "\tbut the backend was compiled without HAVE_INT64_TIMESTAMP.\n"
- "\tIt looks like you need to recompile or initdb.");
-#endif
-
- if (ControlFile->localeBuflen != LOCALE_NAME_BUFLEN)
- elog(PANIC,
- "The database cluster was initialized with LOCALE_NAME_BUFLEN %d,\n"
- "\tbut the backend was compiled with LOCALE_NAME_BUFLEN %d.\n"
- "\tIt looks like you need to initdb.",
- ControlFile->localeBuflen, LOCALE_NAME_BUFLEN);
-
- if (setlocale(LC_COLLATE, ControlFile->lc_collate) == NULL)
- elog(PANIC,
- "The database cluster was initialized with LC_COLLATE '%s',\n"
- "\twhich is not recognized by setlocale().\n"
- "\tIt looks like you need to initdb.",
- ControlFile->lc_collate);
- if (setlocale(LC_CTYPE, ControlFile->lc_ctype) == NULL)
- elog(PANIC,
- "The database cluster was initialized with LC_CTYPE '%s',\n"
- "\twhich is not recognized by setlocale().\n"
- "\tIt looks like you need to initdb.",
- ControlFile->lc_ctype);
-}
-
-void
-UpdateControlFile(void)
-{
- int fd;
-
- INIT_CRC64(ControlFile->crc);
- COMP_CRC64(ControlFile->crc,
- (char *) ControlFile + sizeof(crc64),
- sizeof(ControlFileData) - sizeof(crc64));
- FIN_CRC64(ControlFile->crc);
-
- fd = BasicOpenFile(ControlFilePath, O_RDWR | PG_BINARY, S_IRUSR | S_IWUSR);
- if (fd < 0)
- elog(PANIC, "could not open control file (%s): %m", ControlFilePath);
-
- errno = 0;
- if (write(fd, ControlFile, sizeof(ControlFileData)) != sizeof(ControlFileData))
- {
- /* if write didn't set errno, assume problem is no disk space */
- if (errno == 0)
- errno = ENOSPC;
- elog(PANIC, "write to control file failed: %m");
- }
-
- if (pg_fsync(fd) != 0)
- elog(PANIC, "fsync of control file failed: %m");
-
- close(fd);
-}
-
-/*
- * Initialization of shared memory for XLOG
- */
-
-int
-XLOGShmemSize(void)
-{
- if (XLOGbuffers < MinXLOGbuffers)
- XLOGbuffers = MinXLOGbuffers;
-
- return MAXALIGN(sizeof(XLogCtlData) + sizeof(XLogRecPtr) * XLOGbuffers)
- + BLCKSZ * XLOGbuffers +
- MAXALIGN(sizeof(ControlFileData));
-}
-
-void
-XLOGShmemInit(void)
-{
- bool found;
-
- /* this must agree with space requested by XLOGShmemSize() */
- if (XLOGbuffers < MinXLOGbuffers)
- XLOGbuffers = MinXLOGbuffers;
-
- XLogCtl = (XLogCtlData *)
- ShmemInitStruct("XLOG Ctl",
- MAXALIGN(sizeof(XLogCtlData) +
- sizeof(XLogRecPtr) * XLOGbuffers)
- + BLCKSZ * XLOGbuffers,
- &found);
- Assert(!found);
- ControlFile = (ControlFileData *)
- ShmemInitStruct("Control File", sizeof(ControlFileData), &found);
- Assert(!found);
-
- memset(XLogCtl, 0, sizeof(XLogCtlData));
-
- /*
- * Since XLogCtlData contains XLogRecPtr fields, its sizeof should be
- * a multiple of the alignment for same, so no extra alignment padding
- * is needed here.
- */
- XLogCtl->xlblocks = (XLogRecPtr *)
- (((char *) XLogCtl) + sizeof(XLogCtlData));
- memset(XLogCtl->xlblocks, 0, sizeof(XLogRecPtr) * XLOGbuffers);
-
- /*
- * Here, on the other hand, we must MAXALIGN to ensure the page
- * buffers have worst-case alignment.
- */
- XLogCtl->pages =
- ((char *) XLogCtl) + MAXALIGN(sizeof(XLogCtlData) +
- sizeof(XLogRecPtr) * XLOGbuffers);
- memset(XLogCtl->pages, 0, BLCKSZ * XLOGbuffers);
-
- /*
- * Do basic initialization of XLogCtl shared data. (StartupXLOG will
- * fill in additional info.)
- */
- XLogCtl->XLogCacheByte = BLCKSZ * XLOGbuffers;
- XLogCtl->XLogCacheBlck = XLOGbuffers - 1;
- XLogCtl->Insert.currpage = (XLogPageHeader) (XLogCtl->pages);
- SpinLockInit(&XLogCtl->info_lck);
-
- /*
- * If we are not in bootstrap mode, pg_control should already exist.
- * Read and validate it immediately (see comments in ReadControlFile()
- * for the reasons why).
- */
- if (!IsBootstrapProcessingMode())
- ReadControlFile();
-}
-
-/*
- * This func must be called ONCE on system install. It creates pg_control
- * and the initial XLOG segment.
- */
-void
-BootStrapXLOG(void)
-{
- CheckPoint checkPoint;
- char *buffer;
- XLogPageHeader page;
- XLogRecord *record;
- bool use_existent;
- crc64 crc;
-
- /* Use malloc() to ensure buffer is MAXALIGNED */
- buffer = (char *) malloc(BLCKSZ);
- page = (XLogPageHeader) buffer;
-
- checkPoint.redo.xlogid = 0;
- checkPoint.redo.xrecoff = SizeOfXLogPHD;
- checkPoint.undo = checkPoint.redo;
- checkPoint.ThisStartUpID = 0;
- checkPoint.nextXid = FirstNormalTransactionId;
- checkPoint.nextOid = BootstrapObjectIdData;
- checkPoint.time = time(NULL);
-
- ShmemVariableCache->nextXid = checkPoint.nextXid;
- ShmemVariableCache->nextOid = checkPoint.nextOid;
- ShmemVariableCache->oidCount = 0;
-
- memset(buffer, 0, BLCKSZ);
- page->xlp_magic = XLOG_PAGE_MAGIC;
- page->xlp_info = 0;
- page->xlp_sui = checkPoint.ThisStartUpID;
- page->xlp_pageaddr.xlogid = 0;
- page->xlp_pageaddr.xrecoff = 0;
- record = (XLogRecord *) ((char *) page + SizeOfXLogPHD);
- record->xl_prev.xlogid = 0;
- record->xl_prev.xrecoff = 0;
- record->xl_xact_prev = record->xl_prev;
- record->xl_xid = InvalidTransactionId;
- record->xl_len = sizeof(checkPoint);
- record->xl_info = XLOG_CHECKPOINT_SHUTDOWN;
- record->xl_rmid = RM_XLOG_ID;
- memcpy(XLogRecGetData(record), &checkPoint, sizeof(checkPoint));
-
- INIT_CRC64(crc);
- COMP_CRC64(crc, &checkPoint, sizeof(checkPoint));
- COMP_CRC64(crc, (char *) record + sizeof(crc64),
- SizeOfXLogRecord - sizeof(crc64));
- FIN_CRC64(crc);
- record->xl_crc = crc;
-
- use_existent = false;
- openLogFile = XLogFileInit(0, 0, &use_existent, false);
-
- errno = 0;
- if (write(openLogFile, buffer, BLCKSZ) != BLCKSZ)
- {
- /* if write didn't set errno, assume problem is no disk space */
- if (errno == 0)
- errno = ENOSPC;
- elog(PANIC, "BootStrapXLOG failed to write log file: %m");
- }
-
- if (pg_fsync(openLogFile) != 0)
- elog(PANIC, "BootStrapXLOG failed to fsync log file: %m");
-
- close(openLogFile);
- openLogFile = -1;
-
- memset(ControlFile, 0, sizeof(ControlFileData));
- /* Initialize pg_control status fields */
- ControlFile->state = DB_SHUTDOWNED;
- ControlFile->time = checkPoint.time;
- ControlFile->logId = 0;
- ControlFile->logSeg = 1;
- ControlFile->checkPoint = checkPoint.redo;
- ControlFile->checkPointCopy = checkPoint;
- /* some additional ControlFile fields are set in WriteControlFile() */
-
- WriteControlFile();
-
- /* Bootstrap the commit log, too */
- BootStrapCLOG();
-}
-
-static char *
-str_time(time_t tnow)
-{
- static char buf[32];
-
- strftime(buf, sizeof(buf),
- "%Y-%m-%d %H:%M:%S %Z",
- localtime(&tnow));
-
- return buf;
-}
-
-/*
- * This must be called ONCE during postmaster or standalone-backend startup
- */
-void
-StartupXLOG(void)
-{
- XLogCtlInsert *Insert;
- CheckPoint checkPoint;
- bool wasShutdown;
- XLogRecPtr RecPtr,
- LastRec,
- checkPointLoc,
- EndOfLog;
- XLogRecord *record;
- char *buffer;
-
- /* Use malloc() to ensure record buffer is MAXALIGNED */
- buffer = (char *) malloc(_INTL_MAXLOGRECSZ);
-
- CritSectionCount++;
-
- /*
- * Read control file and check XLOG status looks valid.
- *
- * Note: in most control paths, *ControlFile is already valid and we need
- * not do ReadControlFile() here, but might as well do it to be sure.
- */
- ReadControlFile();
-
- if (ControlFile->logSeg == 0 ||
- ControlFile->state < DB_SHUTDOWNED ||
- ControlFile->state > DB_IN_PRODUCTION ||
- !XRecOffIsValid(ControlFile->checkPoint.xrecoff))
- elog(PANIC, "control file context is broken");
-
- if (ControlFile->state == DB_SHUTDOWNED)
- elog(LOG, "database system was shut down at %s",
- str_time(ControlFile->time));
- else if (ControlFile->state == DB_SHUTDOWNING)
- elog(LOG, "database system shutdown was interrupted at %s",
- str_time(ControlFile->time));
- else if (ControlFile->state == DB_IN_RECOVERY)
- elog(LOG, "database system was interrupted being in recovery at %s\n"
- "\tThis probably means that some data blocks are corrupted\n"
- "\tand you will have to use the last backup for recovery.",
- str_time(ControlFile->time));
- else if (ControlFile->state == DB_IN_PRODUCTION)
- elog(LOG, "database system was interrupted at %s",
- str_time(ControlFile->time));
-
- /*
- * Get the last valid checkpoint record. If the latest one according
- * to pg_control is broken, try the next-to-last one.
- */
- record = ReadCheckpointRecord(ControlFile->checkPoint, 1, buffer);
- if (record != NULL)
- {
- checkPointLoc = ControlFile->checkPoint;
- elog(LOG, "checkpoint record is at %X/%X",
- checkPointLoc.xlogid, checkPointLoc.xrecoff);
- }
- else
- {
- record = ReadCheckpointRecord(ControlFile->prevCheckPoint, 2, buffer);
- if (record != NULL)
- {
- checkPointLoc = ControlFile->prevCheckPoint;
- elog(LOG, "using previous checkpoint record at %X/%X",
- checkPointLoc.xlogid, checkPointLoc.xrecoff);
- InRecovery = true; /* force recovery even if SHUTDOWNED */
- }
- else
- elog(PANIC, "unable to locate a valid checkpoint record");
- }
- LastRec = RecPtr = checkPointLoc;
- memcpy(&checkPoint, XLogRecGetData(record), sizeof(CheckPoint));
- wasShutdown = (record->xl_info == XLOG_CHECKPOINT_SHUTDOWN);
-
- elog(LOG, "redo record is at %X/%X; undo record is at %X/%X; shutdown %s",
- checkPoint.redo.xlogid, checkPoint.redo.xrecoff,
- checkPoint.undo.xlogid, checkPoint.undo.xrecoff,
- wasShutdown ? "TRUE" : "FALSE");
- elog(LOG, "next transaction id: %u; next oid: %u",
- checkPoint.nextXid, checkPoint.nextOid);
- if (!TransactionIdIsNormal(checkPoint.nextXid))
- elog(PANIC, "invalid next transaction id");
-
- ShmemVariableCache->nextXid = checkPoint.nextXid;
- ShmemVariableCache->nextOid = checkPoint.nextOid;
- ShmemVariableCache->oidCount = 0;
-
- ThisStartUpID = checkPoint.ThisStartUpID;
- RedoRecPtr = XLogCtl->Insert.RedoRecPtr =
- XLogCtl->SavedRedoRecPtr = checkPoint.redo;
-
- if (XLByteLT(RecPtr, checkPoint.redo))
- elog(PANIC, "invalid redo in checkpoint record");
- if (checkPoint.undo.xrecoff == 0)
- checkPoint.undo = RecPtr;
-
- if (XLByteLT(checkPoint.undo, RecPtr) ||
- XLByteLT(checkPoint.redo, RecPtr))
- {
- if (wasShutdown)
- elog(PANIC, "invalid redo/undo record in shutdown checkpoint");
- InRecovery = true;
- }
- else if (ControlFile->state != DB_SHUTDOWNED)
- InRecovery = true;
-
- /* REDO */
- if (InRecovery)
- {
- elog(LOG, "database system was not properly shut down; "
- "automatic recovery in progress");
- ControlFile->state = DB_IN_RECOVERY;
- ControlFile->time = time(NULL);
- UpdateControlFile();
-
- XLogInitRelationCache();
-
- /* Is REDO required ? */
- if (XLByteLT(checkPoint.redo, RecPtr))
- record = ReadRecord(&(checkPoint.redo), PANIC, buffer);
- else
- {
- /* read past CheckPoint record */
- record = ReadRecord(NULL, LOG, buffer);
- }
-
- if (record != NULL)
- {
- InRedo = true;
- elog(LOG, "redo starts at %X/%X",
- ReadRecPtr.xlogid, ReadRecPtr.xrecoff);
- do
- {
- /* nextXid must be beyond record's xid */
- if (TransactionIdFollowsOrEquals(record->xl_xid,
- ShmemVariableCache->nextXid))
- {
- ShmemVariableCache->nextXid = record->xl_xid;
- TransactionIdAdvance(ShmemVariableCache->nextXid);
- }
- if (XLOG_DEBUG)
- {
- char buf[8192];
-
- sprintf(buf, "REDO @ %X/%X; LSN %X/%X: ",
- ReadRecPtr.xlogid, ReadRecPtr.xrecoff,
- EndRecPtr.xlogid, EndRecPtr.xrecoff);
- xlog_outrec(buf, record);
- strcat(buf, " - ");
- RmgrTable[record->xl_rmid].rm_desc(buf,
- record->xl_info, XLogRecGetData(record));
- elog(LOG, "%s", buf);
- }
-
- if (record->xl_info & XLR_BKP_BLOCK_MASK)
- RestoreBkpBlocks(record, EndRecPtr);
-
- RmgrTable[record->xl_rmid].rm_redo(EndRecPtr, record);
- record = ReadRecord(NULL, LOG, buffer);
- } while (record != NULL);
- elog(LOG, "redo done at %X/%X",
- ReadRecPtr.xlogid, ReadRecPtr.xrecoff);
- LastRec = ReadRecPtr;
- InRedo = false;
- }
- else
- elog(LOG, "redo is not required");
- }
-
- /*
- * Init xlog buffer cache using the block containing the last valid
- * record from the previous incarnation.
- */
- record = ReadRecord(&LastRec, PANIC, buffer);
- EndOfLog = EndRecPtr;
- XLByteToPrevSeg(EndOfLog, openLogId, openLogSeg);
- openLogFile = XLogFileOpen(openLogId, openLogSeg, false);
- openLogOff = 0;
- ControlFile->logId = openLogId;
- ControlFile->logSeg = openLogSeg + 1;
- Insert = &XLogCtl->Insert;
- Insert->PrevRecord = LastRec;
-
- /*
- * If the next record will go to the new page then initialize for that
- * one.
- */
- if ((BLCKSZ - EndOfLog.xrecoff % BLCKSZ) < SizeOfXLogRecord)
- EndOfLog.xrecoff += (BLCKSZ - EndOfLog.xrecoff % BLCKSZ);
- if (EndOfLog.xrecoff % BLCKSZ == 0)
- {
- XLogRecPtr NewPageEndPtr;
-
- NewPageEndPtr = EndOfLog;
- if (NewPageEndPtr.xrecoff >= XLogFileSize)
- {
- /* crossing a logid boundary */
- NewPageEndPtr.xlogid += 1;
- NewPageEndPtr.xrecoff = BLCKSZ;
- }
- else
- NewPageEndPtr.xrecoff += BLCKSZ;
- XLogCtl->xlblocks[0] = NewPageEndPtr;
- Insert->currpage->xlp_magic = XLOG_PAGE_MAGIC;
- if (InRecovery)
- Insert->currpage->xlp_sui = ThisStartUpID;
- else
- Insert->currpage->xlp_sui = ThisStartUpID + 1;
- Insert->currpage->xlp_pageaddr.xlogid = NewPageEndPtr.xlogid;
- Insert->currpage->xlp_pageaddr.xrecoff = NewPageEndPtr.xrecoff - BLCKSZ;
- /* rest of buffer was zeroed in XLOGShmemInit */
- Insert->currpos = (char *) Insert->currpage + SizeOfXLogPHD;
- }
- else
- {
- XLogCtl->xlblocks[0].xlogid = openLogId;
- XLogCtl->xlblocks[0].xrecoff =
- ((EndOfLog.xrecoff - 1) / BLCKSZ + 1) * BLCKSZ;
-
- /*
- * Tricky point here: readBuf contains the *last* block that the
- * LastRec record spans, not the one it starts in. The last block
- * is indeed the one we want to use.
- */
- Assert(readOff == (XLogCtl->xlblocks[0].xrecoff - BLCKSZ) % XLogSegSize);
- memcpy((char *) Insert->currpage, readBuf, BLCKSZ);
- Insert->currpos = (char *) Insert->currpage +
- (EndOfLog.xrecoff + BLCKSZ - XLogCtl->xlblocks[0].xrecoff);
- /* Make sure rest of page is zero */
- memset(Insert->currpos, 0, INSERT_FREESPACE(Insert));
- }
-
- LogwrtResult.Write = LogwrtResult.Flush = EndOfLog;
-
- XLogCtl->Write.LogwrtResult = LogwrtResult;
- Insert->LogwrtResult = LogwrtResult;
- XLogCtl->LogwrtResult = LogwrtResult;
-
- XLogCtl->LogwrtRqst.Write = EndOfLog;
- XLogCtl->LogwrtRqst.Flush = EndOfLog;
-
-#ifdef NOT_USED
- /* UNDO */
- if (InRecovery)
- {
- RecPtr = ReadRecPtr;
- if (XLByteLT(checkPoint.undo, RecPtr))
- {
- elog(LOG, "undo starts at %X/%X",
- RecPtr.xlogid, RecPtr.xrecoff);
- do
- {
- record = ReadRecord(&RecPtr, PANIC, buffer);
- if (TransactionIdIsValid(record->xl_xid) &&
- !TransactionIdDidCommit(record->xl_xid))
- RmgrTable[record->xl_rmid].rm_undo(EndRecPtr, record);
- RecPtr = record->xl_prev;
- } while (XLByteLE(checkPoint.undo, RecPtr));
- elog(LOG, "undo done at %X/%X",
- ReadRecPtr.xlogid, ReadRecPtr.xrecoff);
- }
- else
- elog(LOG, "undo is not required");
- }
-#endif
-
- if (InRecovery)
- {
- /*
- * In case we had to use the secondary checkpoint, make sure that
- * it will still be shown as the secondary checkpoint after this
- * CreateCheckPoint operation; we don't want the broken primary
- * checkpoint to become prevCheckPoint...
- */
- ControlFile->checkPoint = checkPointLoc;
- CreateCheckPoint(true);
- XLogCloseRelationCache();
- }
-
- /*
- * Preallocate additional log files, if wanted.
- */
- PreallocXlogFiles(EndOfLog);
-
- InRecovery = false;
-
- ControlFile->state = DB_IN_PRODUCTION;
- ControlFile->time = time(NULL);
- UpdateControlFile();
-
- ThisStartUpID++;
- XLogCtl->ThisStartUpID = ThisStartUpID;
-
- /* Start up the commit log, too */
- StartupCLOG();
-
- elog(LOG, "database system is ready");
- CritSectionCount--;
-
- /* Shut down readFile facility, free space */
- if (readFile >= 0)
- {
- close(readFile);
- readFile = -1;
- }
- if (readBuf)
- {
- free(readBuf);
- readBuf = NULL;
- }
-
- free(buffer);
-}
-
-/*
- * Subroutine to try to fetch and validate a prior checkpoint record.
- * whichChkpt = 1 for "primary", 2 for "secondary", merely informative
- */
-static XLogRecord *
-ReadCheckpointRecord(XLogRecPtr RecPtr,
- int whichChkpt,
- char *buffer)
-{
- XLogRecord *record;
-
- if (!XRecOffIsValid(RecPtr.xrecoff))
- {
- elog(LOG, (whichChkpt == 1 ?
- "invalid primary checkpoint link in control file" :
- "invalid secondary checkpoint link in control file"));
- return NULL;
- }
-
- record = ReadRecord(&RecPtr, LOG, buffer);
-
- if (record == NULL)
- {
- elog(LOG, (whichChkpt == 1 ?
- "invalid primary checkpoint record" :
- "invalid secondary checkpoint record"));
- return NULL;
- }
- if (record->xl_rmid != RM_XLOG_ID)
- {
- elog(LOG, (whichChkpt == 1 ?
- "invalid resource manager id in primary checkpoint record" :
- "invalid resource manager id in secondary checkpoint record"));
- return NULL;
- }
- if (record->xl_info != XLOG_CHECKPOINT_SHUTDOWN &&
- record->xl_info != XLOG_CHECKPOINT_ONLINE)
- {
- elog(LOG, (whichChkpt == 1 ?
- "invalid xl_info in primary checkpoint record" :
- "invalid xl_info in secondary checkpoint record"));
- return NULL;
- }
- if (record->xl_len != sizeof(CheckPoint))
- {
- elog(LOG, (whichChkpt == 1 ?
- "invalid length of primary checkpoint record" :
- "invalid length of secondary checkpoint record"));
- return NULL;
- }
- return record;
-}
-
-/*
- * Postmaster uses this to initialize ThisStartUpID & RedoRecPtr from
- * XLogCtlData located in shmem after successful startup.
- */
-void
-SetThisStartUpID(void)
-{
- ThisStartUpID = XLogCtl->ThisStartUpID;
- RedoRecPtr = XLogCtl->SavedRedoRecPtr;
-}
-
-/*
- * CheckPoint process called by postmaster saves copy of new RedoRecPtr
- * in shmem (using SetSavedRedoRecPtr). When checkpointer completes,
- * postmaster calls GetSavedRedoRecPtr to update its own copy of RedoRecPtr,
- * so that subsequently-spawned backends will start out with a reasonably
- * up-to-date local RedoRecPtr. Since these operations are not protected by
- * any lock and copying an XLogRecPtr isn't atomic, it's unsafe to use either
- * of these routines at other times!
- */
-void
-SetSavedRedoRecPtr(void)
-{
- XLogCtl->SavedRedoRecPtr = RedoRecPtr;
-}
-
-void
-GetSavedRedoRecPtr(void)
-{
- RedoRecPtr = XLogCtl->SavedRedoRecPtr;
-}
-
-/*
- * Once spawned, a backend may update its local RedoRecPtr from
- * XLogCtl->Insert.RedoRecPtr; it must hold the insert lock or info_lck
- * to do so. This is done in XLogInsert() or GetRedoRecPtr().
- */
-XLogRecPtr
-GetRedoRecPtr(void)
-{
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- Assert(XLByteLE(RedoRecPtr, xlogctl->Insert.RedoRecPtr));
- RedoRecPtr = xlogctl->Insert.RedoRecPtr;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
-
- return RedoRecPtr;
-}
-
-/*
- * This must be called ONCE during postmaster or standalone-backend shutdown
- */
-void
-ShutdownXLOG(void)
-{
- elog(LOG, "shutting down");
-
- /* suppress in-transaction check in CreateCheckPoint */
- MyLastRecPtr.xrecoff = 0;
- MyXactMadeXLogEntry = false;
-
- CritSectionCount++;
- CreateDummyCaches();
- CreateCheckPoint(true);
- ShutdownCLOG();
- CritSectionCount--;
-
- elog(LOG, "database system is shut down");
-}
-
-/*
- * Perform a checkpoint --- either during shutdown, or on-the-fly
- */
-void
-CreateCheckPoint(bool shutdown)
-{
- CheckPoint checkPoint;
- XLogRecPtr recptr;
- XLogCtlInsert *Insert = &XLogCtl->Insert;
- XLogRecData rdata;
- uint32 freespace;
- uint32 _logId;
- uint32 _logSeg;
-
- if (MyXactMadeXLogEntry)
- elog(ERROR, "CreateCheckPoint: cannot be called inside transaction block");
-
- /*
- * The CheckpointLock can be held for quite a while, which is not good
- * because we won't respond to a cancel/die request while waiting for
- * an LWLock. (But the alternative of using a regular lock won't work
- * for background checkpoint processes, which are not regular
- * backends.) So, rather than use a plain LWLockAcquire, use this
- * kluge to allow an interrupt to be accepted while we are waiting:
- */
- while (!LWLockConditionalAcquire(CheckpointLock, LW_EXCLUSIVE))
- {
- CHECK_FOR_INTERRUPTS();
- sleep(1);
- }
-
- START_CRIT_SECTION();
-
- if (shutdown)
- {
- ControlFile->state = DB_SHUTDOWNING;
- ControlFile->time = time(NULL);
- UpdateControlFile();
- }
-
- memset(&checkPoint, 0, sizeof(checkPoint));
- checkPoint.ThisStartUpID = ThisStartUpID;
- checkPoint.time = time(NULL);
-
- LWLockAcquire(WALInsertLock, LW_EXCLUSIVE);
-
- /*
- * If this isn't a shutdown, and we have not inserted any XLOG records
- * since the start of the last checkpoint, skip the checkpoint. The
- * idea here is to avoid inserting duplicate checkpoints when the
- * system is idle. That wastes log space, and more importantly it
- * exposes us to possible loss of both current and previous checkpoint
- * records if the machine crashes just as we're writing the update.
- * (Perhaps it'd make even more sense to checkpoint only when the
- * previous checkpoint record is in a different xlog page?)
- *
- * We have to make two tests to determine that nothing has happened since
- * the start of the last checkpoint: current insertion point must
- * match the end of the last checkpoint record, and its redo pointer
- * must point to itself.
- */
- if (!shutdown)
- {
- XLogRecPtr curInsert;
-
- INSERT_RECPTR(curInsert, Insert, Insert->curridx);
- if (curInsert.xlogid == ControlFile->checkPoint.xlogid &&
- curInsert.xrecoff == ControlFile->checkPoint.xrecoff +
- MAXALIGN(SizeOfXLogRecord + sizeof(CheckPoint)) &&
- ControlFile->checkPoint.xlogid ==
- ControlFile->checkPointCopy.redo.xlogid &&
- ControlFile->checkPoint.xrecoff ==
- ControlFile->checkPointCopy.redo.xrecoff)
- {
- LWLockRelease(WALInsertLock);
- LWLockRelease(CheckpointLock);
- END_CRIT_SECTION();
- return;
- }
- }
-
- /*
- * Compute new REDO record ptr = location of next XLOG record.
- *
- * NB: this is NOT necessarily where the checkpoint record itself will
- * be, since other backends may insert more XLOG records while we're
- * off doing the buffer flush work. Those XLOG records are logically
- * after the checkpoint, even though physically before it. Got that?
- */
- freespace = INSERT_FREESPACE(Insert);
- if (freespace < SizeOfXLogRecord)
- {
- (void) AdvanceXLInsertBuffer();
- /* OK to ignore update return flag, since we will do flush anyway */
- freespace = BLCKSZ - SizeOfXLogPHD;
- }
- INSERT_RECPTR(checkPoint.redo, Insert, Insert->curridx);
-
- /*
- * Here we update the shared RedoRecPtr for future XLogInsert calls;
- * this must be done while holding the insert lock AND the info_lck.
- */
- {
- /* use volatile pointer to prevent code rearrangement */
- volatile XLogCtlData *xlogctl = XLogCtl;
-
- SpinLockAcquire_NoHoldoff(&xlogctl->info_lck);
- RedoRecPtr = xlogctl->Insert.RedoRecPtr = checkPoint.redo;
- SpinLockRelease_NoHoldoff(&xlogctl->info_lck);
- }
-
- /*
- * Get UNDO record ptr - this is oldest of PGPROC->logRec values. We do
- * this while holding insert lock to ensure that we won't miss any
- * about-to-commit transactions (UNDO must include all xacts that have
- * commits after REDO point).
- *
- * XXX temporarily ifdef'd out to avoid three-way deadlock condition:
- * GetUndoRecPtr needs to grab SInvalLock to ensure that it is looking
- * at a stable set of proc records, but grabbing SInvalLock while holding
- * WALInsertLock is no good. GetNewTransactionId may cause a WAL record
- * to be written while holding XidGenLock, and GetSnapshotData needs to
- * get XidGenLock while holding SInvalLock, so there's a risk of deadlock.
- * Need to find a better solution. See pgsql-hackers discussion of
- * 17-Dec-01.
- */
-#ifdef NOT_USED
- checkPoint.undo = GetUndoRecPtr();
-
- if (shutdown && checkPoint.undo.xrecoff != 0)
- elog(PANIC, "active transaction while database system is shutting down");
-#endif
-
- /*
- * Now we can release insert lock, allowing other xacts to proceed
- * even while we are flushing disk buffers.
- */
- LWLockRelease(WALInsertLock);
-
- LWLockAcquire(XidGenLock, LW_SHARED);
- checkPoint.nextXid = ShmemVariableCache->nextXid;
- LWLockRelease(XidGenLock);
-
- LWLockAcquire(OidGenLock, LW_SHARED);
- checkPoint.nextOid = ShmemVariableCache->nextOid;
- if (!shutdown)
- checkPoint.nextOid += ShmemVariableCache->oidCount;
- LWLockRelease(OidGenLock);
-
- /*
- * Having constructed the checkpoint record, ensure all shmem disk
- * buffers are flushed to disk.
- */
- FlushBufferPool();
-
- /* And commit-log buffers, too */
- CheckPointCLOG();
-
- /*
- * Now insert the checkpoint record into XLOG.
- */
- rdata.buffer = InvalidBuffer;
- rdata.data = (char *) (&checkPoint);
- rdata.len = sizeof(checkPoint);
- rdata.next = NULL;
-
- recptr = XLogInsert(RM_XLOG_ID,
- shutdown ? XLOG_CHECKPOINT_SHUTDOWN :
- XLOG_CHECKPOINT_ONLINE,
- &rdata);
-
- XLogFlush(recptr);
-
- /*
- * We now have ProcLastRecPtr = start of actual checkpoint record,
- * recptr = end of actual checkpoint record.
- */
- if (shutdown && !XLByteEQ(checkPoint.redo, ProcLastRecPtr))
- elog(PANIC, "concurrent transaction log activity while database system is shutting down");
-
- /*
- * Select point at which we can truncate the log, which we base on the
- * prior checkpoint's earliest info.
- *
- * With UNDO support: oldest item is redo or undo, whichever is older;
- * but watch out for case that undo = 0.
- *
- * Without UNDO support: just use the redo pointer. This allows xlog
- * space to be freed much faster when there are long-running
- * transactions.
- */
-#ifdef NOT_USED
- if (ControlFile->checkPointCopy.undo.xrecoff != 0 &&
- XLByteLT(ControlFile->checkPointCopy.undo,
- ControlFile->checkPointCopy.redo))
- XLByteToSeg(ControlFile->checkPointCopy.undo, _logId, _logSeg);
- else
-#endif
- XLByteToSeg(ControlFile->checkPointCopy.redo, _logId, _logSeg);
-
- /*
- * Update the control file.
- */
- LWLockAcquire(ControlFileLock, LW_EXCLUSIVE);
- if (shutdown)
- ControlFile->state = DB_SHUTDOWNED;
- ControlFile->prevCheckPoint = ControlFile->checkPoint;
- ControlFile->checkPoint = ProcLastRecPtr;
- ControlFile->checkPointCopy = checkPoint;
- ControlFile->time = time(NULL);
- UpdateControlFile();
- LWLockRelease(ControlFileLock);
-
- /*
- * Delete offline log files (those no longer needed even for previous
- * checkpoint).
- */
- if (_logId || _logSeg)
- {
- PrevLogSeg(_logId, _logSeg);
- MoveOfflineLogs(_logId, _logSeg, recptr);
- }
-
- /*
- * Make more log segments if needed. (Do this after deleting offline
- * log segments, to avoid having peak disk space usage higher than
- * necessary.)
- */
- if (!shutdown)
- PreallocXlogFiles(recptr);
-
- LWLockRelease(CheckpointLock);
-
- END_CRIT_SECTION();
-}
-
-/*
- * Write a NEXTOID log record
- */
-void
-XLogPutNextOid(Oid nextOid)
-{
- XLogRecData rdata;
-
- rdata.buffer = InvalidBuffer;
- rdata.data = (char *) (&nextOid);
- rdata.len = sizeof(Oid);
- rdata.next = NULL;
- (void) XLogInsert(RM_XLOG_ID, XLOG_NEXTOID, &rdata);
-}
-
-/*
- * XLOG resource manager's routines
- */
-void
-xlog_redo(XLogRecPtr lsn, XLogRecord *record)
-{
- uint8 info = record->xl_info & ~XLR_INFO_MASK;
-
- if (info == XLOG_NEXTOID)
- {
- Oid nextOid;
-
- memcpy(&nextOid, XLogRecGetData(record), sizeof(Oid));
- if (ShmemVariableCache->nextOid < nextOid)
- {
- ShmemVariableCache->nextOid = nextOid;
- ShmemVariableCache->oidCount = 0;
- }
- }
- else if (info == XLOG_CHECKPOINT_SHUTDOWN)
- {
- CheckPoint checkPoint;
-
- memcpy(&checkPoint, XLogRecGetData(record), sizeof(CheckPoint));
- /* In a SHUTDOWN checkpoint, believe the counters exactly */
- ShmemVariableCache->nextXid = checkPoint.nextXid;
- ShmemVariableCache->nextOid = checkPoint.nextOid;
- ShmemVariableCache->oidCount = 0;
- }
- else if (info == XLOG_CHECKPOINT_ONLINE)
- {
- CheckPoint checkPoint;
-
- memcpy(&checkPoint, XLogRecGetData(record), sizeof(CheckPoint));
- /* In an ONLINE checkpoint, treat the counters like NEXTOID */
- if (TransactionIdPrecedes(ShmemVariableCache->nextXid,
- checkPoint.nextXid))
- ShmemVariableCache->nextXid = checkPoint.nextXid;
- if (ShmemVariableCache->nextOid < checkPoint.nextOid)
- {
- ShmemVariableCache->nextOid = checkPoint.nextOid;
- ShmemVariableCache->oidCount = 0;
- }
- }
-}
-
-void
-xlog_undo(XLogRecPtr lsn, XLogRecord *record)
-{
-}
-
-void
-xlog_desc(char *buf, uint8 xl_info, char *rec)
-{
- uint8 info = xl_info & ~XLR_INFO_MASK;
-
- if (info == XLOG_CHECKPOINT_SHUTDOWN ||
- info == XLOG_CHECKPOINT_ONLINE)
- {
- CheckPoint *checkpoint = (CheckPoint *) rec;
-
- sprintf(buf + strlen(buf), "checkpoint: redo %X/%X; undo %X/%X; "
- "sui %u; xid %u; oid %u; %s",
- checkpoint->redo.xlogid, checkpoint->redo.xrecoff,
- checkpoint->undo.xlogid, checkpoint->undo.xrecoff,
- checkpoint->ThisStartUpID, checkpoint->nextXid,
- checkpoint->nextOid,
- (info == XLOG_CHECKPOINT_SHUTDOWN) ? "shutdown" : "online");
- }
- else if (info == XLOG_NEXTOID)
- {
- Oid nextOid;
-
- memcpy(&nextOid, rec, sizeof(Oid));
- sprintf(buf + strlen(buf), "nextOid: %u", nextOid);
- }
- else
- strcat(buf, "UNKNOWN");
-}
-
-static void
-xlog_outrec(char *buf, XLogRecord *record)
-{
- int bkpb;
- int i;
-
- sprintf(buf + strlen(buf), "prev %X/%X; xprev %X/%X; xid %u",
- record->xl_prev.xlogid, record->xl_prev.xrecoff,
- record->xl_xact_prev.xlogid, record->xl_xact_prev.xrecoff,
- record->xl_xid);
-
- for (i = 0, bkpb = 0; i < XLR_MAX_BKP_BLOCKS; i++)
- {
- if (!(record->xl_info & (XLR_SET_BKP_BLOCK(i))))
- continue;
- bkpb++;
- }
-
- if (bkpb)
- sprintf(buf + strlen(buf), "; bkpb %d", bkpb);
-
- sprintf(buf + strlen(buf), ": %s",
- RmgrTable[record->xl_rmid].rm_name);
-}
-
-
-/*
- * GUC support
- */
-const char *
-assign_xlog_sync_method(const char *method, bool doit, bool interactive)
-{
- int new_sync_method;
- int new_sync_bit;
-
- if (strcasecmp(method, "fsync") == 0)
- {
- new_sync_method = SYNC_METHOD_FSYNC;
- new_sync_bit = 0;
- }
-#ifdef HAVE_FDATASYNC
- else if (strcasecmp(method, "fdatasync") == 0)
- {
- new_sync_method = SYNC_METHOD_FDATASYNC;
- new_sync_bit = 0;
- }
-#endif
-#ifdef OPEN_SYNC_FLAG
- else if (strcasecmp(method, "open_sync") == 0)
- {
- new_sync_method = SYNC_METHOD_OPEN;
- new_sync_bit = OPEN_SYNC_FLAG;
- }
-#endif
-#ifdef OPEN_DATASYNC_FLAG
- else if (strcasecmp(method, "open_datasync") == 0)
- {
- new_sync_method = SYNC_METHOD_OPEN;
- new_sync_bit = OPEN_DATASYNC_FLAG;
- }
-#endif
- else
- {
- return NULL;
- }
-
- if (!doit)
- return method;
-
- if (sync_method != new_sync_method || open_sync_bit != new_sync_bit)
- {
- /*
- * To ensure that no blocks escape unsynced, force an fsync on the
- * currently open log segment (if any). Also, if the open flag is
- * changing, close the log file so it will be reopened (with new
- * flag bit) at next use.
- */
- if (openLogFile >= 0)
- {
- if (pg_fsync(openLogFile) != 0)
- elog(PANIC, "fsync of log file %u, segment %u failed: %m",
- openLogId, openLogSeg);
- if (open_sync_bit != new_sync_bit)
- {
- if (close(openLogFile) != 0)
- elog(PANIC, "close of log file %u, segment %u failed: %m",
- openLogId, openLogSeg);
- openLogFile = -1;
- }
- }
- sync_method = new_sync_method;
- open_sync_bit = new_sync_bit;
- }
-
- return method;
-}
-
-
-/*
- * Issue appropriate kind of fsync (if any) on the current XLOG output file
- */
-static void
-issue_xlog_fsync(void)
-{
- switch (sync_method)
- {
- case SYNC_METHOD_FSYNC:
- if (pg_fsync(openLogFile) != 0)
- elog(PANIC, "fsync of log file %u, segment %u failed: %m",
- openLogId, openLogSeg);
- break;
-#ifdef HAVE_FDATASYNC
- case SYNC_METHOD_FDATASYNC:
- if (pg_fdatasync(openLogFile) != 0)
- elog(PANIC, "fdatasync of log file %u, segment %u failed: %m",
- openLogId, openLogSeg);
- break;
-#endif
- case SYNC_METHOD_OPEN:
- /* write synced it already */
- break;
- default:
- elog(PANIC, "bogus wal_sync_method %d", sync_method);
- break;
- }
-}