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https://git.postgresql.org/git/postgresql.git
synced 2024-12-27 08:39:28 +08:00
Move init_ps_display from postgres.c to postmaster.c, putting it
just after receipt of the startup packet. Now, postmaster children that are waiting for client authentication response will show as 'postgres: user database host authentication'. Also, do an init_ps_display for startup/shutdown/checkpoint subprocesses, so that they are readily identifiable as well. Fix an obscure race condition that could lead to Assert failure in the postmaster --- attempting to start a checkpoint process before any connections have been received led to calling PostmasterRandom before setting random_seed.
This commit is contained in:
Tom Lane
parent
9047292725
commit
eb133197b6
@ -37,7 +37,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.245 2001/10/03 21:58:28 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.246 2001/10/19 00:44:08 tgl Exp $
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*
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* NOTES
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*
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@ -73,7 +73,8 @@
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#include <fcntl.h>
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#include <time.h>
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#include <sys/param.h>
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/* moved here to prevent double define */
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <limits.h>
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@ -103,6 +104,7 @@
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#include "utils/exc.h"
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#include "utils/guc.h"
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#include "utils/memutils.h"
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#include "utils/ps_status.h"
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#include "bootstrap/bootstrap.h"
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#include "pgstat.h"
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@ -194,6 +196,10 @@ int PreAuthDelay = 0;
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int AuthenticationTimeout = 60;
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int CheckPointTimeout = 300;
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bool HostnameLookup; /* for ps display */
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bool ShowPortNumber;
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bool Log_connections = false;
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/* Startup/shutdown state */
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static pid_t StartupPID = 0,
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ShutdownPID = 0,
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@ -821,7 +827,7 @@ ServerLoop(void)
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struct timeval timeout_tv;
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if (CheckPointPID == 0 && checkpointed &&
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Shutdown == NoShutdown && !FatalError)
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Shutdown == NoShutdown && !FatalError && random_seed != 0)
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{
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time_t now = time(NULL);
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@ -981,7 +987,9 @@ initMasks(fd_set *rmask, fd_set *wmask)
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* not return at all.
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*
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* (Note that elog(FATAL) stuff is sent to the client, so only use it
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* if that's what you want.)
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* if that's what you want. Return STATUS_ERROR if you don't want to
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* send anything to the client, which would typically be appropriate
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* if we detect a communications failure.)
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*/
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static int
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ProcessStartupPacket(Port *port, bool SSLdone)
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@ -991,7 +999,12 @@ ProcessStartupPacket(Port *port, bool SSLdone)
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int32 len;
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void *buf;
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pq_getbytes((char *)&len, 4);
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if (pq_getbytes((char *) &len, 4) == EOF)
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{
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elog(DEBUG, "incomplete startup packet");
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return STATUS_ERROR;
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}
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len = ntohl(len);
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len -= 4;
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@ -999,7 +1012,12 @@ ProcessStartupPacket(Port *port, bool SSLdone)
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elog(FATAL, "invalid length of startup packet");
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buf = palloc(len);
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pq_getbytes(buf, len);
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if (pq_getbytes(buf, len) == EOF)
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{
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elog(DEBUG, "incomplete startup packet");
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return STATUS_ERROR;
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}
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packet = buf;
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@ -1913,6 +1931,7 @@ split_opts(char **argv, int *argcp, char *s)
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static int
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DoBackend(Port *port)
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{
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char *remote_host;
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char *av[ARGV_SIZE * 2];
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int ac = 0;
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char debugbuf[ARGV_SIZE];
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@ -1981,14 +2000,78 @@ DoBackend(Port *port)
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/*
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* Receive the startup packet (which might turn out to be a cancel
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* request packet); then perform client authentication.
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* request packet).
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*/
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status = ProcessStartupPacket(port, false);
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if (status == 127)
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return 0; /* cancel request processed */
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if (status != STATUS_OK)
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return 0; /* cancel request processed, or error */
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ClientAuthentication(MyProcPort); /* might not return, if failure */
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/*
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* Now that we have the user and database name, we can set the process
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* title for ps. It's good to do this as early as possible in startup.
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*
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* But first, we need the remote host name.
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*/
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if (port->raddr.sa.sa_family == AF_INET)
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{
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unsigned short remote_port;
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char *host_addr;
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remote_port = ntohs(port->raddr.in.sin_port);
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host_addr = inet_ntoa(port->raddr.in.sin_addr);
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remote_host = NULL;
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if (HostnameLookup)
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{
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struct hostent *host_ent;
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host_ent = gethostbyaddr((char *) &port->raddr.in.sin_addr,
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sizeof(port->raddr.in.sin_addr),
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AF_INET);
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if (host_ent)
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{
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remote_host = palloc(strlen(host_addr) + strlen(host_ent->h_name) + 3);
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sprintf(remote_host, "%s[%s]", host_ent->h_name, host_addr);
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}
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}
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if (remote_host == NULL)
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remote_host = pstrdup(host_addr);
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if (ShowPortNumber)
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{
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char *str = palloc(strlen(remote_host) + 7);
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sprintf(str, "%s:%hu", remote_host, remote_port);
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pfree(remote_host);
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remote_host = str;
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}
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}
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else
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{
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/* not AF_INET */
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remote_host = "[local]";
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}
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/*
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* Set process parameters for ps
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*
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* WARNING: On some platforms the environment will be moved around to
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* make room for the ps display string. So any references to
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* optarg or getenv() from above will be invalid after this call.
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* Better use strdup or something similar.
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*/
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init_ps_display(real_argc, real_argv, port->user, port->database,
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remote_host);
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set_ps_display("authentication");
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/*
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* Now perform authentication exchange.
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*/
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ClientAuthentication(port); /* might not return, if failure */
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/*
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* Done with authentication. Disable timeout, and prevent SIGTERM/SIGQUIT
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@ -1998,6 +2081,10 @@ DoBackend(Port *port)
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elog(FATAL, "DoBackend: Unable to disable timer for auth timeout");
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PG_SETMASK(&BlockSig);
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if (Log_connections)
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elog(DEBUG, "connection: host=%s user=%s database=%s",
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remote_host, port->user, port->database);
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/*
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* Don't want backend to be able to see the postmaster random number
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* generator state. We have to clobber the static random_seed *and*
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@ -2138,7 +2225,7 @@ schedule_checkpoint(SIGNAL_ARGS)
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/* Ignore request if checkpointing is currently disabled */
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if (CheckPointPID == 0 && checkpointed &&
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Shutdown == NoShutdown && !FatalError)
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Shutdown == NoShutdown && !FatalError && random_seed != 0)
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{
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CheckPointPID = CheckPointDataBase();
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/* note: if fork fails, CheckPointPID stays 0; nothing happens */
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@ -2302,6 +2389,7 @@ SSDataBase(int xlop)
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if ((pid = fork()) == 0) /* child */
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{
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const char *statmsg;
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char *av[ARGV_SIZE * 2];
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int ac = 0;
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char nbbuf[ARGV_SIZE];
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@ -2321,6 +2409,30 @@ SSDataBase(int xlop)
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/* Close the postmaster's sockets */
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ClosePostmasterPorts(true);
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/*
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* Identify myself via ps
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*
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* WARNING: On some platforms the environment will be moved around to
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* make room for the ps display string.
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*/
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switch (xlop)
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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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break;
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case BS_XLOG_SHUTDOWN:
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statmsg = "shutdown subprocess";
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break;
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default:
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statmsg = "??? subprocess";
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break;
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}
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init_ps_display(real_argc, real_argv, statmsg, "", "");
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set_ps_display("");
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/* Set up command-line arguments for subprocess */
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av[ac++] = "postgres";
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.234 2001/09/27 16:29:12 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.235 2001/10/19 00:44:08 tgl Exp $
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*
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* NOTES
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* this is the "main" module of the postgres backend and
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@ -30,9 +30,6 @@
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#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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@ -77,14 +74,6 @@ extern char *optarg;
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char *debug_query_string; /* used by pgmonitor */
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/*
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* for ps display
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*/
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bool HostnameLookup;
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bool ShowPortNumber;
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bool Log_connections = false;
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/* Note: whereToSendOutput is initialized for the bootstrap/standalone case */
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CommandDest whereToSendOutput = Debug;
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@ -1131,9 +1120,6 @@ PostgresMain(int argc, char *argv[],
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int firstchar;
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StringInfo parser_input;
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char *remote_host;
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unsigned short remote_port;
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char *potential_DataDir = NULL;
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/*
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@ -1165,6 +1151,8 @@ PostgresMain(int argc, char *argv[],
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MemoryContextInit();
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}
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set_ps_display("startup");
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SetProcessingMode(InitProcessing);
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/*
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@ -1625,65 +1613,6 @@ PostgresMain(int argc, char *argv[],
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elog(FATAL, "%s: could not locate executable, bailing out...",
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real_argv[0]);
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/*
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* Find remote host name or address.
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*/
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remote_host = NULL;
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if (IsUnderPostmaster)
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{
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if (MyProcPort->raddr.sa.sa_family == AF_INET)
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{
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struct hostent *host_ent;
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char *host_addr;
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remote_port = ntohs(MyProcPort->raddr.in.sin_port);
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host_addr = inet_ntoa(MyProcPort->raddr.in.sin_addr);
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if (HostnameLookup)
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{
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host_ent = gethostbyaddr((char *) &MyProcPort->raddr.in.sin_addr, sizeof(MyProcPort->raddr.in.sin_addr), AF_INET);
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if (host_ent)
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{
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remote_host = palloc(strlen(host_addr) + strlen(host_ent->h_name) + 3);
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sprintf(remote_host, "%s[%s]", host_ent->h_name, host_addr);
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}
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}
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if (remote_host == NULL)
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remote_host = pstrdup(host_addr);
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if (ShowPortNumber)
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{
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char *str = palloc(strlen(remote_host) + 7);
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sprintf(str, "%s:%hu", remote_host, remote_port);
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pfree(remote_host);
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remote_host = str;
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}
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}
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else
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/* not AF_INET */
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remote_host = "[local]";
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/*
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* Set process parameters for ps
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*
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* WARNING: On some platforms the environment will be moved around to
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* make room for the ps display string. So any references to
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* optarg or getenv() from above will be invalid after this call.
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* Better use strdup or something similar.
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*/
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init_ps_display(real_argc, real_argv, username, DBName, remote_host);
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set_ps_display("startup");
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}
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if (Log_connections)
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elog(DEBUG, "connection: host=%s user=%s database=%s",
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remote_host, username, DBName);
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/*
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* General initialization.
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*
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@ -1716,7 +1645,7 @@ PostgresMain(int argc, char *argv[],
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if (!IsUnderPostmaster)
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{
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puts("\nPOSTGRES backend interactive interface ");
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puts("$Revision: 1.234 $ $Date: 2001/09/27 16:29:12 $\n");
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puts("$Revision: 1.235 $ $Date: 2001/10/19 00:44:08 $\n");
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}
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/*
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