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https://github.com/postgres/postgres.git
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Separate out bgwriter code into a logically separate module, rather
than being random pieces of other files. Give bgwriter responsibility for all checkpoint activity (other than a post-recovery checkpoint); so this child process absorbs the functionality of the former transient checkpoint and shutdown subprocesses. While at it, create an actual include file for postmaster.c, which for some reason never had its own file before.
This commit is contained in:
Tom Lane
@ -8,7 +8,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.181 2004/05/28 05:12:45 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.182 2004/05/29 22:48:18 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -33,6 +33,7 @@
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#include "executor/executor.h"
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#include "libpq/pqsignal.h"
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#include "miscadmin.h"
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#include "postmaster/bgwriter.h"
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#include "pgtime.h"
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#include "storage/freespace.h"
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#include "storage/ipc.h"
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@ -50,6 +51,8 @@
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#define ALLOC(t, c) ((t *) calloc((unsigned)(c), sizeof(t)))
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extern int Int_yyparse(void);
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static void usage(void);
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static void bootstrap_signals(void);
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static hashnode *AddStr(char *str, int strlength, int mderef);
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static Form_pg_attribute AllocateAttribute(void);
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static bool BootstrapAlreadySeen(Oid id);
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@ -192,44 +195,8 @@ typedef struct _IndexList
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static IndexList *ILHead = NULL;
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/* ----------------------------------------------------------------
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* misc functions
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* ----------------------------------------------------------------
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*/
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/* ----------------
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* error handling / abort routines
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* ----------------
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*/
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void
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err_out(void)
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{
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Warnings++;
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cleanup();
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}
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/* usage:
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* usage help for the bootstrap backend
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*/
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static void
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usage(void)
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{
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fprintf(stderr,
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gettext("Usage:\n"
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" postgres -boot [OPTION]... DBNAME\n"
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" -c NAME=VALUE set run-time parameter\n"
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" -d 1-5 debug level\n"
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" -D datadir data directory\n"
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" -F turn off fsync\n"
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" -o file send debug output to file\n"
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" -x num internal use\n"));
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proc_exit(1);
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}
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/*
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* The main loop for running the backend in bootstrap mode
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* The main entry point for running the backend in bootstrap mode
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*
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* The bootstrap mode is used to initialize the template database.
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* The bootstrap backend doesn't speak SQL, but instead expects
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@ -387,19 +354,13 @@ BootstrapMain(int argc, char *argv[])
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switch (xlogop)
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{
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case BS_XLOG_STARTUP:
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statmsg = "startup subprocess";
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break;
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case BS_XLOG_CHECKPOINT:
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statmsg = "checkpoint subprocess";
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statmsg = "startup process";
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break;
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case BS_XLOG_BGWRITER:
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statmsg = "bgwriter subprocess";
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break;
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case BS_XLOG_SHUTDOWN:
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statmsg = "shutdown subprocess";
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statmsg = "writer process";
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break;
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default:
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statmsg = "??? subprocess";
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statmsg = "??? process";
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break;
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}
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init_ps_display(statmsg, "", "");
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@ -415,48 +376,9 @@ BootstrapMain(int argc, char *argv[])
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pg_timezone_initialize();
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}
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if (IsUnderPostmaster)
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{
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/*
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* Properly accept or ignore signals the postmaster might send us
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*/
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pqsignal(SIGHUP, SIG_IGN);
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pqsignal(SIGINT, SIG_IGN); /* ignore query-cancel */
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pqsignal(SIGTERM, die);
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pqsignal(SIGQUIT, quickdie);
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pqsignal(SIGALRM, SIG_IGN);
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pqsignal(SIGPIPE, SIG_IGN);
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pqsignal(SIGUSR1, SIG_IGN);
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pqsignal(SIGUSR2, SIG_IGN);
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/*
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* Reset some signals that are accepted by postmaster but not here
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*/
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pqsignal(SIGCHLD, SIG_DFL);
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pqsignal(SIGTTIN, SIG_DFL);
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pqsignal(SIGTTOU, SIG_DFL);
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pqsignal(SIGCONT, SIG_DFL);
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pqsignal(SIGWINCH, SIG_DFL);
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/*
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* Unblock signals (they were blocked when the postmaster forked
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* us)
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*/
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PG_SETMASK(&UnBlockSig);
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}
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else
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{
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/* Set up appropriately for interactive use */
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pqsignal(SIGHUP, die);
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pqsignal(SIGINT, die);
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pqsignal(SIGTERM, die);
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pqsignal(SIGQUIT, die);
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/*
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* Create lockfile for data directory.
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*/
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/* If standalone, create lockfile for data directory */
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if (!IsUnderPostmaster)
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CreateDataDirLockFile(DataDir, false);
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}
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SetProcessingMode(BootstrapProcessing);
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IgnoreSystemIndexes(true);
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@ -488,37 +410,30 @@ BootstrapMain(int argc, char *argv[])
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switch (xlogop)
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{
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case BS_XLOG_NOP:
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bootstrap_signals();
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break;
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case BS_XLOG_BOOTSTRAP:
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bootstrap_signals();
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BootStrapXLOG();
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StartupXLOG();
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break;
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case BS_XLOG_CHECKPOINT:
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InitXLOGAccess();
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CreateCheckPoint(false, false);
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proc_exit(0); /* done */
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case BS_XLOG_BGWRITER:
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InitXLOGAccess();
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BufferBackgroundWriter();
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proc_exit(0); /* done */
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case BS_XLOG_STARTUP:
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bootstrap_signals();
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StartupXLOG();
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LoadFreeSpaceMap();
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proc_exit(0); /* done */
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proc_exit(0); /* startup done */
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case BS_XLOG_SHUTDOWN:
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case BS_XLOG_BGWRITER:
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/* don't set signals, bgwriter has its own agenda */
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InitXLOGAccess();
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ShutdownXLOG(0, 0);
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DumpFreeSpaceMap(0, 0);
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proc_exit(0); /* done */
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BackgroundWriterMain();
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proc_exit(1); /* should never return */
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default:
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elog(PANIC, "unrecognized XLOG op: %d", xlogop);
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proc_exit(0);
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proc_exit(1);
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}
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SetProcessingMode(BootstrapProcessing);
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@ -575,9 +490,90 @@ BootstrapMain(int argc, char *argv[])
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/* not reached, here to make compiler happy */
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return 0;
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}
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/* ----------------------------------------------------------------
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* misc functions
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* ----------------------------------------------------------------
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*/
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/* usage:
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* usage help for the bootstrap backend
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*/
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static void
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usage(void)
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{
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fprintf(stderr,
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gettext("Usage:\n"
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" postgres -boot [OPTION]... DBNAME\n"
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" -c NAME=VALUE set run-time parameter\n"
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" -d 1-5 debug level\n"
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" -D datadir data directory\n"
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" -F turn off fsync\n"
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" -o file send debug output to file\n"
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" -x num internal use\n"));
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proc_exit(1);
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}
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/*
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* Set up signal handling for a bootstrap process
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*/
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static void
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bootstrap_signals(void)
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{
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if (IsUnderPostmaster)
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{
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/*
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* Properly accept or ignore signals the postmaster might send us
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*/
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pqsignal(SIGHUP, SIG_IGN);
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pqsignal(SIGINT, SIG_IGN); /* ignore query-cancel */
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pqsignal(SIGTERM, die);
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pqsignal(SIGQUIT, quickdie);
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pqsignal(SIGALRM, SIG_IGN);
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pqsignal(SIGPIPE, SIG_IGN);
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pqsignal(SIGUSR1, SIG_IGN);
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pqsignal(SIGUSR2, SIG_IGN);
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/*
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* Reset some signals that are accepted by postmaster but not here
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*/
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pqsignal(SIGCHLD, SIG_DFL);
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pqsignal(SIGTTIN, SIG_DFL);
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pqsignal(SIGTTOU, SIG_DFL);
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pqsignal(SIGCONT, SIG_DFL);
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pqsignal(SIGWINCH, SIG_DFL);
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/*
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* Unblock signals (they were blocked when the postmaster forked
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* us)
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*/
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PG_SETMASK(&UnBlockSig);
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}
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else
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{
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/* Set up appropriately for interactive use */
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pqsignal(SIGHUP, die);
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pqsignal(SIGINT, die);
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pqsignal(SIGTERM, die);
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pqsignal(SIGQUIT, die);
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}
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}
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/* ----------------
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* error handling / abort routines
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* ----------------
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*/
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void
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err_out(void)
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{
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Warnings++;
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cleanup();
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}
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/* ----------------------------------------------------------------
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* MANUAL BACKEND INTERACTIVE INTERFACE COMMANDS
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* ----------------------------------------------------------------
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