1855 lines
61 KiB
C++
1855 lines
61 KiB
C++
/* -------------------------------------------------------------------------
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*
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* miscinit.c
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* miscellaneous initialization support stuff
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*
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* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/backend/utils/init/miscinit.c
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*
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* -------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "knl/knl_variable.h"
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#include <sys/param.h>
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#include <signal.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <grp.h>
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#include <pwd.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#ifdef HAVE_UTIME_H
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#include <utime.h>
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#endif
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#include <sys/utsname.h>
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#include "catalog/pg_authid.h"
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#include "commands/user.h"
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#include "job/job_scheduler.h"
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#include "job/job_worker.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "pgstat.h"
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#include "postmaster/autovacuum.h"
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#include "postmaster/postmaster.h"
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#include "postmaster/snapcapturer.h"
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#include "postmaster/rbcleaner.h"
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#include "storage/smgr/fd.h"
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#include "storage/ipc.h"
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#include "storage/pg_shmem.h"
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#include "storage/proc.h"
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#include "storage/procarray.h"
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#include "utils/builtins.h"
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#include "utils/guc.h"
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#include "utils/memutils.h"
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#include "utils/syscache.h"
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#include "libpq/libpq.h"
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#include "auditfuncs.h"
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#include "replication/walsender.h"
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#include "alarm/alarm.h"
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#include "pgxc/pgxc.h"
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#include "pgxc/poolmgr.h"
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#include "catalog/pgxc_group.h"
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#include "optimizer/nodegroups.h"
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#include "utils/inval.h"
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#include "utils/lsyscache.h"
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#include "gs_policy/policy_common.h"
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#ifdef ENABLE_MULTIPLE_NODES
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#include "tsdb/compaction/compaction_entry.h"
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#endif /* ENABLE_MULTIPLE_NODES */
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#include "access/ustore/knl_undoworker.h"
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#define DIRECTORY_LOCK_FILE "postmaster.pid"
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#define INIT_SESSION_MAX_INT32_BUFF 20
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Alarm alarmItemTooManyDbUserConn[1] = {ALM_AI_Unknown, ALM_AS_Normal, 0, 0, 0, 0, {0}, {0}, NULL};
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/* ----------------------------------------------------------------
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* ignoring system indexes support stuff
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*
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* NOTE: "ignoring system indexes" means we do not use the system indexes
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* for lookups (either in hardwired catalog accesses or in planner-generated
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* plans). We do, however, still update the indexes when a catalog
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* modification is made.
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* ----------------------------------------------------------------
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*/
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void ReportAlarmTooManyDbUserConn(const char* roleName)
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{
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AlarmAdditionalParam tempAdditionalParam;
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// Initialize the alarm item
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AlarmItemInitialize(alarmItemTooManyDbUserConn,
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ALM_AI_TooManyDbUserConn,
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alarmItemTooManyDbUserConn->stat,
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NULL,
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alarmItemTooManyDbUserConn->lastReportTime,
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alarmItemTooManyDbUserConn->reportCount);
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// fill the alarm message
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WriteAlarmAdditionalInfo(&tempAdditionalParam,
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g_instance.attr.attr_common.PGXCNodeName,
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"AllDatabases",
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const_cast<char*>(roleName),
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alarmItemTooManyDbUserConn,
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ALM_AT_Fault,
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const_cast<char*>(roleName));
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// report the alarm
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AlarmReporter(alarmItemTooManyDbUserConn, ALM_AT_Fault, &tempAdditionalParam);
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}
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void ReportResumeTooManyDbUserConn(const char* roleName)
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{
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AlarmAdditionalParam tempAdditionalParam;
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// Initialize the alarm item
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AlarmItemInitialize(alarmItemTooManyDbUserConn,
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ALM_AI_TooManyDbUserConn,
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alarmItemTooManyDbUserConn->stat,
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NULL,
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alarmItemTooManyDbUserConn->lastReportTime,
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alarmItemTooManyDbUserConn->reportCount);
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// fill the resume message
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WriteAlarmAdditionalInfo(&tempAdditionalParam,
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g_instance.attr.attr_common.PGXCNodeName,
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"AllDatabases",
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const_cast<char*>(roleName),
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alarmItemTooManyDbUserConn,
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ALM_AT_Resume);
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// report the alarm
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AlarmReporter(alarmItemTooManyDbUserConn, ALM_AT_Resume, &tempAdditionalParam);
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}
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void ReportAlarmDataInstLockFileExist()
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{
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Alarm alarmItem[1];
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AlarmAdditionalParam tempAdditionalParam;
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// Initialize the alarm item
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AlarmItemInitialize(alarmItem, ALM_AI_DataInstLockFileExist, ALM_AS_Reported, NULL);
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// fill the alarm message
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WriteAlarmAdditionalInfo(&tempAdditionalParam,
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g_instance.attr.attr_common.PGXCNodeName,
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"",
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"",
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alarmItem,
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ALM_AT_Fault,
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g_instance.attr.attr_common.PGXCNodeName);
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// report the alarm
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AlarmReporter(alarmItem, ALM_AT_Fault, &tempAdditionalParam);
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}
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void ReportResumeDataInstLockFileExist()
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{
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Alarm alarmItem[1];
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AlarmAdditionalParam tempAdditionalParam;
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// Initialize the alarm item
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AlarmItemInitialize(alarmItem, ALM_AI_DataInstLockFileExist, ALM_AS_Normal, NULL);
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// fill the alarm message
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WriteAlarmAdditionalInfo(
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&tempAdditionalParam, g_instance.attr.attr_common.PGXCNodeName, "", "", alarmItem, ALM_AT_Resume);
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// report the alarm
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AlarmReporter(alarmItem, ALM_AT_Resume, &tempAdditionalParam);
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}
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/* ----------------------------------------------------------------
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* database path / name support stuff
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* ----------------------------------------------------------------
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*/
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void SetDatabasePath(const char* path)
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{
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/* This should happen only once per process */
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Assert(!u_sess->proc_cxt.DatabasePath);
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u_sess->proc_cxt.DatabasePath =
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MemoryContextStrdup(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), path);
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}
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/*
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* Set data directory, but make sure it's an absolute path. Use this,
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* never set t_thrd.proc_cxt.DataDir directly.
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*/
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void SetDataDir(const char* dir)
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{
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AssertArg(dir);
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/* If presented path is relative, convert to absolute */
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char* newm = make_absolute_path(dir);
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char real_newm[PATH_MAX + 1] = {'\0'};
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char* DataDir = (char*)MemoryContextAlloc(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), MAXPGPATH);
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if (realpath(newm, real_newm) == NULL) {
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ereport(ERROR, (errcode(ERRCODE_FILE_READ_FAILED),errmsg("invalid path:%s", dir)));
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}
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errno_t rc = strncpy_s(DataDir, MAXPGPATH, real_newm, MAXPGPATH - 1);
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securec_check(rc, "\0", "\0");
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pfree(newm);
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if (t_thrd.proc_cxt.DataDir) {
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#ifdef FRONTEND
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free(t_thrd.proc_cxt.DataDir);
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#else
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pfree(t_thrd.proc_cxt.DataDir);
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#endif
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}
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t_thrd.proc_cxt.DataDir = DataDir;
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}
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/*
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* Change working directory to t_thrd.proc_cxt.DataDir. Most of the postmaster and backend
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* code assumes that we are in t_thrd.proc_cxt.DataDir so it can use relative paths to access
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* stuff in and under the data directory. For convenience during path
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* setup, however, we don't force the chdir to occur during SetDataDir.
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*/
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void ChangeToDataDir(void)
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{
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AssertState(t_thrd.proc_cxt.DataDir);
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if (chdir(t_thrd.proc_cxt.DataDir) < 0)
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ereport(FATAL,
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(errcode_for_file_access(), errmsg("could not change directory to \"%s\": %m", t_thrd.proc_cxt.DataDir)));
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}
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/*
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* If the given pathname isn't already absolute, make it so, interpreting
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* it relative to the current working directory.
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*
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* Also canonicalizes the path. The result is always a malloc'd copy.
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*
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* Note: interpretation of relative-path arguments during postmaster startup
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* should happen before doing ChangeToDataDir(), else the user will probably
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* not like the results.
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*/
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char* make_absolute_path(const char* path)
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{
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char* newm = NULL;
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size_t tmplen;
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/* Returning null for null input is convenient for some callers */
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if (path == NULL) {
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return NULL;
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}
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if (!is_absolute_path(path)) {
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char* buf = NULL;
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size_t buflen;
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buflen = MAXPGPATH;
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for (;;) {
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#ifdef FRONTEND
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buf = (char*)malloc(buflen);
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#else
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buf = (char*)MemoryContextAlloc(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), buflen);
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#endif
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if (buf == NULL)
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ereport(FATAL, (errcode(ERRCODE_OUT_OF_MEMORY), errmsg("out of memory")));
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if (getcwd(buf, buflen) != NULL) {
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break;
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}
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else if (errno == ERANGE) {
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#ifdef FRONTEND
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free(buf);
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#else
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pfree(buf);
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#endif
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buflen *= 2;
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continue;
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} else {
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#ifdef FRONTEND
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free(buf);
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#else
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pfree(buf);
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#endif
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ereport(FATAL, (errmsg("could not get current working directory: %m")));
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}
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}
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tmplen = strlen(buf) + strlen(path) + 2;
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#ifdef FRONTEND
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newm = (char*)malloc(tmplen);
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#else
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newm = (char*)MemoryContextAlloc(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), tmplen);
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#endif
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if (newm == NULL)
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ereport(FATAL, (errcode(ERRCODE_OUT_OF_MEMORY), errmsg("out of memory")));
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int rcs = snprintf_s(newm, tmplen, tmplen - 1, "%s/%s", buf, path);
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securec_check_ss(rcs, "\0", "\0");
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#ifdef FRONTEND
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free(buf);
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#else
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pfree(buf);
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#endif
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} else {
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newm = MemoryContextStrdup(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), path);
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if (newm == NULL)
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ereport(FATAL, (errcode(ERRCODE_OUT_OF_MEMORY), errmsg("out of memory")));
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}
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/* Make sure punctuation is canonical, too */
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canonicalize_path(newm);
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return newm;
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}
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/*
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* GetAuthenticatedUserId - get the authenticated user ID.
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*/
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Oid GetAuthenticatedUserId(void)
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{
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return u_sess->misc_cxt.AuthenticatedUserId;
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}
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/*
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* GetUserId - get the current effective user ID.
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*
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* Note: there's no SetUserId() anymore; use SetUserIdAndSecContext().
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*/
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Oid GetUserId(void)
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{
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if (!OidIsValid(u_sess->misc_cxt.CurrentUserId)) {
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ereport(ERROR, (errcode(ERRCODE_INTERNAL_ERROR),
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errmsg("Current user id is invalid. Please try later.")));
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}
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return u_sess->misc_cxt.CurrentUserId;
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}
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/* Database Security: Support database audit */
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/*
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* Brief : get the current effective user ID.
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* Description : called by all process.
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*/
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Oid GetCurrentUserId(void)
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{
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return u_sess->misc_cxt.CurrentUserId;
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}
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/*
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* GetOuterUserId/SetOuterUserId - get/set the outer-level user ID.
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*/
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Oid GetOuterUserId(void)
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{
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AssertState(OidIsValid(u_sess->misc_cxt.OuterUserId));
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return u_sess->misc_cxt.OuterUserId;
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}
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static void SetOuterUserId(Oid userid)
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{
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AssertState(u_sess->misc_cxt.SecurityRestrictionContext == 0);
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AssertArg(OidIsValid(userid));
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u_sess->misc_cxt.OuterUserId = userid;
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/* We force the effective user ID to match, too */
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u_sess->misc_cxt.CurrentUserId = userid;
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}
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/*
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* GetSessionUserId/SetSessionUserId - get/set the session user ID.
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*/
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Oid GetSessionUserId(void)
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{
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AssertState(OidIsValid(u_sess->misc_cxt.SessionUserId));
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return u_sess->misc_cxt.SessionUserId;
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}
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static void SetSessionUserId(Oid userid, bool is_superuser)
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{
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AssertState(u_sess->misc_cxt.SecurityRestrictionContext == 0);
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AssertArg(OidIsValid(userid));
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u_sess->misc_cxt.SessionUserId = userid;
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u_sess->misc_cxt.SessionUserIsSuperuser = is_superuser;
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u_sess->misc_cxt.SetRoleIsActive = false;
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/* We force the effective user IDs to match, too */
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u_sess->misc_cxt.OuterUserId = userid;
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u_sess->misc_cxt.CurrentUserId = userid;
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/* update user id in MyBEEntry */
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if (t_thrd.shemem_ptr_cxt.MyBEEntry != NULL)
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t_thrd.shemem_ptr_cxt.MyBEEntry->st_userid = userid;
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}
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/*
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* modify_nodegroup_mode - get current node group mode;
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* The valid current_nodegroup_mode value is NG_COMMON and NG_LOGIC.
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* In datanode, current_nodegroup_mode value is always NG_COMMON because
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* pgxc_group has no record in datanode;
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*/
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void modify_nodegroup_mode()
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{
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if (t_thrd.proc_cxt.postgres_initialized && (IS_PGXC_COORDINATOR || isRestoreMode) &&
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u_sess->misc_cxt.current_nodegroup_mode == NG_UNKNOWN) {
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HeapTuple htup;
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u_sess->misc_cxt.current_nodegroup_mode = NG_COMMON;
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htup = SearchSysCache1(PGXCGROUPNAME, CStringGetDatum(VNG_OPTION_ELASTIC_GROUP));
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if (HeapTupleIsValid(htup)) {
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u_sess->misc_cxt.current_nodegroup_mode = NG_LOGIC;
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ReleaseSysCache(htup);
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}
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}
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}
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/*
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* in_logic_cluster - judge whether current session is in logic cluster mode.
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*/
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bool in_logic_cluster()
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{
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modify_nodegroup_mode();
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return u_sess->misc_cxt.current_nodegroup_mode == NG_LOGIC;
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}
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/*
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* exist_logic_cluster - judge whether elastic_group exist.
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* The method is simiar as in_logic_cluster, but the overhead is greater than in_logic_cluster.
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* The function is independent of inval message.
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*/
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bool exist_logic_cluster()
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{
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if (!IS_PGXC_COORDINATOR)
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return false;
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HeapTuple htup;
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htup = SearchSysCache1(PGXCGROUPNAME, CStringGetDatum(VNG_OPTION_ELASTIC_GROUP));
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if (HeapTupleIsValid(htup)) {
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ReleaseSysCache(htup);
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return true;
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}
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return false;
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}
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|
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#ifdef ENABLE_MULTIPLE_NODES
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/*
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* show_nodegroup_mode - return node group mode as sting.
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* The function is only used in guc.cpp.
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*/
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const char* show_nodegroup_mode(void)
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{
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modify_nodegroup_mode();
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switch (u_sess->misc_cxt.current_nodegroup_mode) {
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case NG_COMMON:
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return "node group";
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case NG_LOGIC:
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return "logic cluster";
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default:
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return "unknown";
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}
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}
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|
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#endif
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|
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#ifndef ENABLE_MULTIPLE_NODES
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const int GetCustomParserId()
|
|
{
|
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int id = 0;
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switch (u_sess->attr.attr_sql.sql_compatibility) {
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case A_FORMAT:
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id = DB_CMPT_A;
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break;
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case B_FORMAT:
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id = DB_CMPT_B;
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break;
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case C_FORMAT:
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id = DB_CMPT_C;
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break;
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case PG_FORMAT:
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id = DB_CMPT_PG;
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break;
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default:
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ereport(WARNING, (errmsg("Unknown sql compatibility: %d", u_sess->attr.attr_sql.sql_compatibility)));
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return -1;
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}
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Assert(id >= 0 && id < DB_CMPT_MAX);
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return id;
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}
|
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#endif
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|
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/*
|
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* get_current_lcgroup_name - get current logic group name.
|
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* The function return NULL in datanode because datanode don't see pgxc_group.
|
|
*/
|
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const char* get_current_lcgroup_name()
|
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{
|
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if (IS_PGXC_COORDINATOR && u_sess->attr.attr_common.current_logic_cluster_name == NULL &&
|
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OidIsValid(u_sess->misc_cxt.current_logic_cluster) && t_thrd.proc_cxt.postgres_initialized) {
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Form_pgxc_group rform;
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HeapTuple groupTup = SearchSysCache1(PGXCGROUPOID, ObjectIdGetDatum(u_sess->misc_cxt.current_logic_cluster));
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|
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if (HeapTupleIsValid(groupTup)) {
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rform = (Form_pgxc_group)GETSTRUCT(groupTup);
|
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u_sess->attr.attr_common.current_logic_cluster_name = MemoryContextStrdup(
|
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SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), NameStr(rform->group_name));
|
|
ReleaseSysCache(groupTup);
|
|
}
|
|
}
|
|
return u_sess->attr.attr_common.current_logic_cluster_name;
|
|
}
|
|
|
|
/*
|
|
* set_current_lcgroup_oid - set current logic group oid.
|
|
* The function is only used when SET ROLE and the session user is admin user.
|
|
*/
|
|
static void set_current_lcgroup_oid(Oid group_oid)
|
|
{
|
|
if (u_sess->misc_cxt.current_logic_cluster != group_oid &&
|
|
u_sess->attr.attr_common.current_logic_cluster_name != NULL) {
|
|
pfree(u_sess->attr.attr_common.current_logic_cluster_name);
|
|
u_sess->attr.attr_common.current_logic_cluster_name = NULL;
|
|
}
|
|
u_sess->misc_cxt.current_logic_cluster = group_oid;
|
|
modify_nodegroup_mode();
|
|
(void)get_current_lcgroup_name();
|
|
}
|
|
|
|
/*
|
|
* show_show_lcgroup_name - show current logic group name.
|
|
* The function is only used in guc.cpp.
|
|
*/
|
|
const char* show_lcgroup_name()
|
|
{
|
|
const char* name = get_current_lcgroup_name();
|
|
return (name == NULL) ? "" : name;
|
|
}
|
|
|
|
/*
|
|
* get_current_lcgroup_oid - get current logic group oid.
|
|
* The logic group oid will not be changed once login for common user.
|
|
* sysadmin user (superuser) is not attached to any logic group, so the
|
|
* logic group oid is InvalidOid when sysadmin user login.
|
|
* SET ROLE will change to session logic group oid and
|
|
* RESET ROLE will restore to InvalidOid for sysadmin user.
|
|
*/
|
|
Oid get_current_lcgroup_oid()
|
|
{
|
|
return u_sess->misc_cxt.current_logic_cluster;
|
|
}
|
|
|
|
/*
|
|
* is_lcgroup_admin - judge whether current user is logic cluster administrator.
|
|
* Notice logic cluster administrator is not system admin user.
|
|
*/
|
|
bool is_lcgroup_admin()
|
|
{
|
|
if (IS_PGXC_COORDINATOR &&
|
|
(!OidIsValid(u_sess->misc_cxt.CurrentUserId) || !OidIsValid(u_sess->misc_cxt.current_logic_cluster))) {
|
|
return false;
|
|
}
|
|
return has_rolvcadmin(u_sess->misc_cxt.CurrentUserId);
|
|
}
|
|
|
|
/*
|
|
* is_logic_cluster - judge whether the node group is logic cluster.
|
|
* The logic cluster's group_kind is 'v' or 'e';
|
|
* NOTICE: the function think elastic_group as logic cluster.
|
|
*/
|
|
bool is_logic_cluster(Oid group_id)
|
|
{
|
|
Datum datum;
|
|
bool isNull = false;
|
|
HeapTuple tup;
|
|
char group_kind;
|
|
|
|
tup = SearchSysCache1(PGXCGROUPOID, ObjectIdGetDatum(group_id));
|
|
|
|
if (HeapTupleIsValid(tup)) {
|
|
datum = SysCacheGetAttr(PGXCGROUPOID, tup, Anum_pgxc_group_kind, &isNull);
|
|
if (!isNull) {
|
|
group_kind = DatumGetChar(datum);
|
|
if (group_kind == 'v' || group_kind == 'e') {
|
|
ReleaseSysCache(tup);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
ReleaseSysCache(tup);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* get_pgxc_logic_groupoid
|
|
* Obtain PGXC Logic Group Oid for roleid
|
|
* Return Invalid Oid if group does not exist
|
|
*/
|
|
Oid get_pgxc_logic_groupoid(Oid roleid)
|
|
{
|
|
bool isNull = true;
|
|
Datum aclDatum;
|
|
Oid group_id;
|
|
HeapTuple roleTup;
|
|
|
|
roleTup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
|
|
|
|
if (!HeapTupleIsValid(roleTup)) {
|
|
return InvalidOid;
|
|
}
|
|
|
|
aclDatum = SysCacheGetAttr(AUTHOID, roleTup, Anum_pg_authid_rolnodegroup, &isNull);
|
|
|
|
group_id = isNull ? InvalidOid : DatumGetObjectId(aclDatum);
|
|
|
|
ReleaseSysCache(roleTup);
|
|
|
|
return group_id;
|
|
}
|
|
|
|
/*
|
|
* get_pgxc_logic_groupoid
|
|
* Obtain PGXC Logic Group Oid for rolename
|
|
* Return Invalid Oid if group does not exist
|
|
*/
|
|
Oid get_pgxc_logic_groupoid(const char* rolename)
|
|
{
|
|
bool isNull = false;
|
|
Datum aclDatum;
|
|
Oid group_id;
|
|
HeapTuple roleTup;
|
|
|
|
roleTup = SearchSysCache1(AUTHNAME, CStringGetDatum(rolename));
|
|
|
|
if (!HeapTupleIsValid(roleTup)) {
|
|
return InvalidOid;
|
|
}
|
|
|
|
isNull = true;
|
|
|
|
aclDatum = SysCacheGetAttr(AUTHOID, roleTup, Anum_pg_authid_rolnodegroup, &isNull);
|
|
|
|
group_id = isNull ? InvalidOid : DatumGetObjectId(aclDatum);
|
|
|
|
ReleaseSysCache(roleTup);
|
|
|
|
return group_id;
|
|
}
|
|
|
|
/*
|
|
* NodeGroupCallback
|
|
* Syscache inval callback function
|
|
*/
|
|
static void NodeGroupCallback(Datum arg, int cacheid, uint32 hashvalue)
|
|
{
|
|
u_sess->misc_cxt.current_nodegroup_mode = NG_UNKNOWN;
|
|
RelationCacheInvalidateBuckets();
|
|
}
|
|
|
|
/*
|
|
* RegisterNodeGroupCacheCallback
|
|
* Register pgxc_group change callback, only for coordinator.
|
|
*/
|
|
static void RegisterNodeGroupCacheCallback()
|
|
{
|
|
if (IS_PGXC_COORDINATOR && !u_sess->misc_cxt.nodegroup_callback_registered) {
|
|
CacheRegisterSyscacheCallback(PGXCGROUPOID, NodeGroupCallback, (Datum)0);
|
|
u_sess->misc_cxt.nodegroup_callback_registered = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* GetUserIdAndSecContext/SetUserIdAndSecContext - get/set the current user ID
|
|
* and the u_sess->misc_cxt.SecurityRestrictionContext flags.
|
|
*
|
|
* Currently there are two valid bits in u_sess->misc_cxt.SecurityRestrictionContext:
|
|
*
|
|
* SECURITY_LOCAL_USERID_CHANGE indicates that we are inside an operation
|
|
* that is temporarily changing u_sess->misc_cxt.CurrentUserId via these functions. This is
|
|
* needed to indicate that the actual value of u_sess->misc_cxt.CurrentUserId is not in sync
|
|
* with guc.c's internal state, so SET ROLE has to be disallowed.
|
|
*
|
|
* SECURITY_RESTRICTED_OPERATION indicates that we are inside an operation
|
|
* that does not wish to trust called user-defined functions at all. This
|
|
* bit prevents not only SET ROLE, but various other changes of session state
|
|
* that normally is unprotected but might possibly be used to subvert the
|
|
* calling session later. An example is replacing an existing prepared
|
|
* statement with new code, which will then be executed with the outer
|
|
* session's permissions when the prepared statement is next used. Since
|
|
* these restrictions are fairly draconian, we apply them only in contexts
|
|
* where the called functions are really supposed to be side-effect-free
|
|
* anyway, such as VACUUM/ANALYZE/REINDEX.
|
|
*
|
|
* Unlike GetUserId, GetUserIdAndSecContext does *not* Assert that the current
|
|
* value of u_sess->misc_cxt.CurrentUserId is valid; nor does SetUserIdAndSecContext require
|
|
* the new value to be valid. In fact, these routines had better not
|
|
* ever throw any kind of error. This is because they are used by
|
|
* StartTransaction and AbortTransaction to save/restore the settings,
|
|
* and during the first transaction within a backend, the value to be saved
|
|
* and perhaps restored is indeed invalid. We have to be able to get
|
|
* through AbortTransaction without asserting in case InitPostgres fails.
|
|
*/
|
|
void GetUserIdAndSecContext(Oid* userid, int* sec_context)
|
|
{
|
|
*userid = u_sess->misc_cxt.CurrentUserId;
|
|
*sec_context = u_sess->misc_cxt.SecurityRestrictionContext;
|
|
}
|
|
|
|
void SetUserIdAndSecContext(Oid userid, int sec_context)
|
|
{
|
|
u_sess->misc_cxt.CurrentUserId = userid;
|
|
u_sess->misc_cxt.SecurityRestrictionContext = sec_context;
|
|
}
|
|
|
|
/*
|
|
* InLocalUserIdChange - are we inside a local change of u_sess->misc_cxt.CurrentUserId?
|
|
*/
|
|
bool InLocalUserIdChange(void)
|
|
{
|
|
return (u_sess->misc_cxt.SecurityRestrictionContext & SECURITY_LOCAL_USERID_CHANGE) != 0;
|
|
}
|
|
|
|
/*
|
|
* InSecurityRestrictedOperation - are we inside a security-restricted command?
|
|
*/
|
|
bool InSecurityRestrictedOperation(void)
|
|
{
|
|
return (u_sess->misc_cxt.SecurityRestrictionContext & SECURITY_RESTRICTED_OPERATION) != 0;
|
|
}
|
|
|
|
/*
|
|
* These are obsolete versions of Get/SetUserIdAndSecContext that are
|
|
* only provided for bug-compatibility with some rather dubious code in
|
|
* pljava. We allow the userid to be set, but only when not inside a
|
|
* security restriction context.
|
|
*/
|
|
void GetUserIdAndContext(Oid* userid, bool* sec_def_context)
|
|
{
|
|
*userid = u_sess->misc_cxt.CurrentUserId;
|
|
*sec_def_context = InLocalUserIdChange();
|
|
}
|
|
|
|
void SetUserIdAndContext(Oid userid, bool sec_def_context)
|
|
{
|
|
/* We throw the same error SET ROLE would. */
|
|
if (InSecurityRestrictedOperation())
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
errmsg("cannot set parameter \"%s\" within security-restricted operation", "role")));
|
|
|
|
u_sess->misc_cxt.CurrentUserId = userid;
|
|
|
|
if (sec_def_context)
|
|
u_sess->misc_cxt.SecurityRestrictionContext |= SECURITY_LOCAL_USERID_CHANGE;
|
|
else
|
|
u_sess->misc_cxt.SecurityRestrictionContext &= ~SECURITY_LOCAL_USERID_CHANGE;
|
|
}
|
|
|
|
/*
|
|
* Check whether specified role has explicit REPLICATION privilege
|
|
*/
|
|
bool has_rolreplication(Oid roleid)
|
|
{
|
|
bool result = false;
|
|
HeapTuple utup;
|
|
|
|
utup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
|
|
|
|
if (HeapTupleIsValid(utup)) {
|
|
result = ((Form_pg_authid)GETSTRUCT(utup))->rolreplication;
|
|
ReleaseSysCache(utup);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Check whether specified role has explicit vcadmin privilege
|
|
*/
|
|
bool has_rolvcadmin(Oid roleid)
|
|
{
|
|
bool isNull = false;
|
|
bool result = false;
|
|
HeapTuple utup;
|
|
Datum datum;
|
|
|
|
utup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
|
|
|
|
if (HeapTupleIsValid(utup)) {
|
|
datum = SysCacheGetAttr(AUTHOID, utup, Anum_pg_authid_rolkind, &isNull);
|
|
if (!isNull) {
|
|
result = (DatumGetChar(datum) == 'v');
|
|
}
|
|
ReleaseSysCache(utup);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Initialize user identity during normal backend startup
|
|
*/
|
|
void InitializeSessionUserId(const char* rolename, Oid useroid)
|
|
{
|
|
HeapTuple roleTup;
|
|
Form_pg_authid rform;
|
|
Oid roleid;
|
|
/* Audit user login*/
|
|
char details[PGAUDIT_MAXLENGTH];
|
|
|
|
/*
|
|
* Don't do scans if we're bootstrapping, none of the system catalogs
|
|
* exist yet, and they should be owned by openGauss anyway.
|
|
*/
|
|
if (IsBootstrapProcessingMode()) {
|
|
ereport(
|
|
ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("IsBootstrapProcessingMode")));
|
|
}
|
|
|
|
/* In pooler stateless reuse mode, to reset session userid */
|
|
if (!ENABLE_STATELESS_REUSE) {
|
|
/* call only once */
|
|
bool isUserOidInvalid = !(OidIsValid(u_sess->misc_cxt.AuthenticatedUserId));
|
|
if (!isUserOidInvalid) {
|
|
AssertState(false);
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("Abnormal process. UserOid has been reseted. Current userOid[%u], reset username is %s,"
|
|
"useroid is %u",
|
|
u_sess->misc_cxt.AuthenticatedUserId, rolename, useroid)));
|
|
}
|
|
}
|
|
|
|
if (rolename != NULL) {
|
|
roleTup = SearchSysCache1(AUTHNAME, PointerGetDatum(rolename));
|
|
} else {
|
|
roleTup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(useroid));
|
|
}
|
|
|
|
#ifndef ENABLE_MULTIPLE_NODES
|
|
/*
|
|
* In opengauss, we allow twophasecleaner to connect to database
|
|
* as superusers for cleaning up temporary tables.
|
|
*/
|
|
if (!HeapTupleIsValid(roleTup) && u_sess->proc_cxt.IsInnerMaintenanceTools) {
|
|
roleTup = SearchSysCache1(AUTHOID, UInt32GetDatum(BOOTSTRAP_SUPERUSERID));
|
|
|
|
char userName[NAMEDATALEN];
|
|
MemoryContext oldcontext = NULL;
|
|
oldcontext = MemoryContextSwitchTo(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR));
|
|
if (u_sess->proc_cxt.MyProcPort->user_name)
|
|
pfree_ext(u_sess->proc_cxt.MyProcPort->user_name);
|
|
u_sess->proc_cxt.MyProcPort->user_name = pstrdup((char*)GetSuperUserName((char*)userName));
|
|
(void)MemoryContextSwitchTo(oldcontext);
|
|
rolename = u_sess->proc_cxt.MyProcPort->user_name;
|
|
}
|
|
#endif
|
|
|
|
if (!HeapTupleIsValid(roleTup)) {
|
|
char roleIdStr[INIT_SESSION_MAX_INT32_BUFF] = {0};
|
|
if (rolename == NULL) {
|
|
int rc = sprintf_s(roleIdStr, INIT_SESSION_MAX_INT32_BUFF, "%u", useroid);
|
|
securec_check_ss(rc, "", "");
|
|
rolename = roleIdStr;
|
|
}
|
|
/*
|
|
* Audit user login
|
|
* it's unsafe to deal with plugins hooks as dynamic lib may be released
|
|
*/
|
|
if (!(g_instance.status > NoShutdown) && user_login_hook) {
|
|
user_login_hook(u_sess->proc_cxt.MyProcPort->database_name, rolename, false, true);
|
|
}
|
|
int rcs = snprintf_truncated_s(details,
|
|
sizeof(details),
|
|
"login db(%s) failed-the role(%s)does not exist",
|
|
u_sess->proc_cxt.MyProcPort->database_name,
|
|
rolename);
|
|
securec_check_ss(rcs, "\0", "\0");
|
|
pgaudit_user_login(FALSE, u_sess->proc_cxt.MyProcPort->database_name, details);
|
|
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION), errmsg("Invalid username/password,login denied.")));
|
|
}
|
|
|
|
rform = (Form_pg_authid)GETSTRUCT(roleTup);
|
|
roleid = HeapTupleGetOid(roleTup);
|
|
if (rolename == NULL) {
|
|
rolename = NameStr(rform->rolname);
|
|
}
|
|
|
|
u_sess->misc_cxt.AuthenticatedUserId = roleid;
|
|
u_sess->misc_cxt.AuthenticatedUserIsSuperuser = rform->rolsuper;
|
|
u_sess->proc_cxt.MyRoleId = roleid;
|
|
|
|
/* This sets u_sess->misc_cxt.OuterUserId/u_sess->misc_cxt.CurrentUserId too */
|
|
SetSessionUserId(roleid, u_sess->misc_cxt.AuthenticatedUserIsSuperuser);
|
|
|
|
RegisterNodeGroupCacheCallback();
|
|
|
|
if (IS_PGXC_COORDINATOR) {
|
|
Datum groupDatum;
|
|
bool isNull = true;
|
|
|
|
groupDatum = SysCacheGetAttr(AUTHOID, roleTup, Anum_pg_authid_rolnodegroup, &isNull);
|
|
|
|
u_sess->misc_cxt.current_logic_cluster = isNull ? InvalidOid : DatumGetObjectId(groupDatum);
|
|
}
|
|
|
|
/* Also mark our PGPROC entry with the authenticated user id */
|
|
/* (We assume this is an atomic store so no lock is needed) */
|
|
t_thrd.proc->roleId = roleid;
|
|
|
|
/*
|
|
* These next checks are not enforced when in standalone mode, so that
|
|
* there is a way to recover from sillinesses like "UPDATE pg_authid SET
|
|
* rolcanlogin = false;".
|
|
*/
|
|
if (IsUnderPostmaster) {
|
|
/*
|
|
* Is role allowed to login at all?
|
|
*/
|
|
if (!rform->rolcanlogin)
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_INVALID_AUTHORIZATION_SPECIFICATION),
|
|
errmsg("role \"%s\" is not permitted to login", rolename)));
|
|
|
|
/*
|
|
* Check connection limit for this role.
|
|
*
|
|
* There is a race condition here --- we create our PGPROC before
|
|
* checking for other PGPROCs. If two backends did this at about the
|
|
* same time, they might both think they were over the limit, while
|
|
* ideally one should succeed and one fail. Getting that to work
|
|
* exactly seems more trouble than it is worth, however; instead we
|
|
* just document that the connection limit is approximate.
|
|
*/
|
|
IncreaseUserCount(roleid);
|
|
if (rform->rolconnlimit >= 0 && !u_sess->misc_cxt.AuthenticatedUserIsSuperuser &&
|
|
CountUserBackends(roleid) > rform->rolconnlimit) {
|
|
ReportAlarmTooManyDbUserConn(rolename);
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_TOO_MANY_CONNECTIONS), errmsg("too many connections for role \"%s\"", rolename)));
|
|
} else if (!u_sess->misc_cxt.AuthenticatedUserIsSuperuser) {
|
|
ReportResumeTooManyDbUserConn(rolename);
|
|
}
|
|
}
|
|
|
|
/* Record username and superuser status as GUC settings too */
|
|
SetConfigOption("session_authorization", rolename, PGC_BACKEND, PGC_S_OVERRIDE);
|
|
SetConfigOption(
|
|
"is_sysadmin", u_sess->misc_cxt.AuthenticatedUserIsSuperuser ? "on" : "off", PGC_INTERNAL, PGC_S_OVERRIDE);
|
|
|
|
ReleaseSysCache(roleTup);
|
|
}
|
|
|
|
/*
|
|
* Initialize user identity during special backend startup
|
|
*/
|
|
void InitializeSessionUserIdStandalone(void)
|
|
{
|
|
/*
|
|
* This function should only be called in single-user mode and in
|
|
* autovacuum workers.
|
|
*/
|
|
#ifdef ENABLE_MULTIPLE_NODES
|
|
AssertState(!IsUnderPostmaster || IsAutoVacuumWorkerProcess() || IsJobSchedulerProcess() || IsJobWorkerProcess() ||
|
|
AM_WAL_SENDER || IsTxnSnapCapturerProcess() || IsTxnSnapWorkerProcess() || IsUndoWorkerProcess() ||
|
|
CompactionProcess::IsTsCompactionProcess() || IsRbCleanerProcess() || IsRbWorkerProcess());
|
|
#else /* ENABLE_MULTIPLE_NODES */
|
|
AssertState(!IsUnderPostmaster || IsAutoVacuumWorkerProcess() || IsJobSchedulerProcess() || IsJobWorkerProcess() ||
|
|
AM_WAL_SENDER || IsTxnSnapCapturerProcess() || IsTxnSnapWorkerProcess() || IsUndoWorkerProcess() || IsRbCleanerProcess() ||
|
|
IsRbWorkerProcess());
|
|
#endif /* ENABLE_MULTIPLE_NODES */
|
|
|
|
/* In pooler stateless reuse mode, to reset session userid */
|
|
if (!ENABLE_STATELESS_REUSE) {
|
|
/* call only once */
|
|
AssertState(!OidIsValid(u_sess->misc_cxt.AuthenticatedUserId));
|
|
}
|
|
|
|
u_sess->misc_cxt.AuthenticatedUserId = BOOTSTRAP_SUPERUSERID;
|
|
u_sess->misc_cxt.AuthenticatedUserIsSuperuser = true;
|
|
|
|
SetSessionUserId(BOOTSTRAP_SUPERUSERID, true);
|
|
|
|
RegisterNodeGroupCacheCallback();
|
|
}
|
|
|
|
/*
|
|
* Change session auth ID while running
|
|
*
|
|
* Only a superuser may set auth ID to something other than himself. Note
|
|
* that in case of multiple SETs in a single session, the original userid's
|
|
* superuserness is what matters. But we set the GUC variable is_superuser
|
|
* to indicate whether the *current* session userid is a superuser.
|
|
*
|
|
* Note: this is not an especially clean place to do the permission check.
|
|
* It's OK because the check does not require catalog access and can't
|
|
* fail during an end-of-transaction GUC reversion, but we may someday
|
|
* have to push it up into assign_session_authorization.
|
|
*/
|
|
void SetSessionAuthorization(Oid userid, bool is_superuser)
|
|
{
|
|
/* Must have authenticated already, else can't make permission check */
|
|
AssertState(OidIsValid(u_sess->misc_cxt.AuthenticatedUserId));
|
|
|
|
if (!t_thrd.xact_cxt.bInAbortTransaction && userid != u_sess->misc_cxt.AuthenticatedUserId &&
|
|
!u_sess->misc_cxt.AuthenticatedUserIsSuperuser && !superuser())
|
|
ereport(
|
|
ERROR, (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), errmsg("permission denied to set session authorization")));
|
|
|
|
SetSessionUserId(userid, is_superuser);
|
|
|
|
SetConfigOption("is_sysadmin", is_superuser ? "on" : "off", PGC_INTERNAL, PGC_S_OVERRIDE);
|
|
}
|
|
|
|
/*
|
|
* Report current role id
|
|
* This follows the semantics of SET ROLE, ie return the outer-level ID
|
|
* not the current effective ID, and return InvalidOid when the setting
|
|
* is logically SET ROLE NONE.
|
|
*/
|
|
Oid GetCurrentRoleId(void)
|
|
{
|
|
if (u_sess->misc_cxt.SetRoleIsActive)
|
|
return u_sess->misc_cxt.OuterUserId;
|
|
else
|
|
return InvalidOid;
|
|
}
|
|
|
|
/*
|
|
* Change Role ID while running (SET ROLE)
|
|
*
|
|
* If roleid is InvalidOid, we are doing SET ROLE NONE: revert to the
|
|
* session user authorization. In this case the is_superuser argument
|
|
* is ignored.
|
|
*
|
|
* When roleid is not InvalidOid, the caller must have checked whether
|
|
* the session user has permission to become that role. (We cannot check
|
|
* here because this routine must be able to execute in a failed transaction
|
|
* to restore a prior value of the ROLE GUC variable.)
|
|
*/
|
|
void SetCurrentRoleId(Oid roleid, bool is_superuser)
|
|
{
|
|
/*
|
|
* Get correct info if it's SET ROLE NONE
|
|
*
|
|
* If u_sess->misc_cxt.SessionUserId hasn't been set yet, just do nothing --- the eventual
|
|
* SetSessionUserId call will fix everything. This is needed since we
|
|
* will get called during GUC initialization.
|
|
*/
|
|
if (!OidIsValid(roleid)) {
|
|
if (!OidIsValid(u_sess->misc_cxt.SessionUserId))
|
|
return;
|
|
|
|
roleid = u_sess->misc_cxt.SessionUserId;
|
|
is_superuser = u_sess->misc_cxt.SessionUserIsSuperuser;
|
|
|
|
u_sess->misc_cxt.SetRoleIsActive = false;
|
|
} else
|
|
u_sess->misc_cxt.SetRoleIsActive = true;
|
|
|
|
SetOuterUserId(roleid);
|
|
|
|
SetConfigOption("is_sysadmin", is_superuser ? "on" : "off", PGC_INTERNAL, PGC_S_OVERRIDE);
|
|
|
|
if (u_sess->misc_cxt.SessionUserIsSuperuser) {
|
|
set_current_lcgroup_oid(OidIsValid(roleid) ? get_pgxc_logic_groupoid(roleid) : InvalidOid);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get user name from user oid
|
|
*/
|
|
char* GetUserNameFromId(Oid roleid)
|
|
{
|
|
HeapTuple tuple;
|
|
char* result = NULL;
|
|
|
|
tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
|
|
|
|
if (!HeapTupleIsValid(tuple))
|
|
ereport(ERROR, (errcode(ERRCODE_UNDEFINED_OBJECT), errmsg("invalid role OID: %u", roleid)));
|
|
|
|
result = pstrdup(NameStr(((Form_pg_authid)GETSTRUCT(tuple))->rolname));
|
|
|
|
ReleaseSysCache(tuple);
|
|
return result;
|
|
}
|
|
|
|
char* GetUserNameById(Oid roleid)
|
|
{
|
|
HeapTuple tuple;
|
|
char* result = NULL;
|
|
|
|
tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(roleid));
|
|
|
|
if (!HeapTupleIsValid(tuple))
|
|
return NULL;
|
|
|
|
result = pstrdup(NameStr(((Form_pg_authid)GETSTRUCT(tuple))->rolname));
|
|
|
|
ReleaseSysCache(tuple);
|
|
return result;
|
|
}
|
|
|
|
|
|
/* -------------------------------------------------------------------------
|
|
* Interlock-file support
|
|
*
|
|
* These routines are used to create both a data-directory lockfile
|
|
* ($DATADIR/postmaster.pid) and a Unix-socket-file lockfile ($SOCKFILE.lock).
|
|
* Both kinds of files contain the same info initially, although we can add
|
|
* more information to a data-directory lockfile after it's created, using
|
|
* AddToDataDirLockFile(). See miscadmin.h for documentation of the contents
|
|
* of these lockfiles.
|
|
*
|
|
* On successful lockfile creation, a proc_exit callback to remove the
|
|
* lockfile is automatically created.
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* proc_exit callback to remove a lockfile.
|
|
*/
|
|
static void UnlinkLockFile(int status, Datum filename)
|
|
{
|
|
char* fname = (char*)DatumGetPointer(filename);
|
|
|
|
if (fname != NULL) {
|
|
if (unlink(fname) != 0) {
|
|
/* Should we complain if the unlink fails? */
|
|
ereport(LOG, (errmsg("unlink lockfile %s fails.", fname)));
|
|
}
|
|
|
|
pfree(fname);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create a lockfile.
|
|
*
|
|
* filename is the name of the lockfile to create.
|
|
* amPostmaster is used to determine how to encode the output PID.
|
|
* isDDLock and refName are used to determine what error message to produce.
|
|
*/
|
|
static void CreateLockFile(const char* filename, bool amPostmaster, bool isDDLock, const char* refName)
|
|
{
|
|
int fd = -1;
|
|
char buffer[MAXPGPATH * 2 + 256];
|
|
int ntries;
|
|
int len;
|
|
int encoded_pid;
|
|
pid_t other_pid;
|
|
pid_t my_pid, my_p_pid, my_gp_pid;
|
|
const char* envvar = NULL;
|
|
|
|
/*
|
|
* If the PID in the lockfile is our own PID or our parent's or
|
|
* grandparent's PID, then the file must be stale (probably left over from
|
|
* a previous system boot cycle). We need to check this because of the
|
|
* likelihood that a reboot will assign exactly the same PID as we had in
|
|
* the previous reboot, or one that's only one or two counts larger and
|
|
* hence the lockfile's PID now refers to an ancestor shell process. We
|
|
* allow pg_ctl to pass down its parent shell PID (our grandparent PID)
|
|
* via the environment variable PG_GRANDPARENT_PID; this is so that
|
|
* launching the postmaster via pg_ctl can be just as reliable as
|
|
* launching it directly. There is no provision for detecting
|
|
* further-removed ancestor processes, but if the init script is written
|
|
* carefully then all but the immediate parent shell will be root-owned
|
|
* processes and so the kill test will fail with EPERM. Note that we
|
|
* cannot get a false negative this way, because an existing postmaster
|
|
* would surely never launch a competing postmaster or pg_ctl process
|
|
* directly.
|
|
*/
|
|
my_pid = getpid();
|
|
|
|
#ifndef WIN32
|
|
my_p_pid = getppid();
|
|
#else
|
|
|
|
/*
|
|
* Windows hasn't got getppid(), but doesn't need it since it's not using
|
|
* real kill() either...
|
|
*/
|
|
my_p_pid = 0;
|
|
#endif
|
|
|
|
envvar = gs_getenv_r("PG_GRANDPARENT_PID");
|
|
|
|
if (envvar != NULL) {
|
|
check_backend_env(envvar);
|
|
my_gp_pid = atoi(envvar);
|
|
} else {
|
|
my_gp_pid = 0;
|
|
}
|
|
|
|
/*
|
|
* We need a loop here because of race conditions. But don't loop forever
|
|
* (for example, a non-writable $PGDATA directory might cause a failure
|
|
* that won't go away). 100 tries seems like plenty.
|
|
*/
|
|
for (ntries = 0;; ntries++) {
|
|
/*
|
|
* Try to create the lock file --- O_EXCL makes this atomic.
|
|
*
|
|
* Think not to make the file protection weaker than 0600. See
|
|
* comments below.
|
|
*/
|
|
fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
|
|
|
|
if (fd >= 0)
|
|
break; /* Success; exit the retry loop */
|
|
|
|
/*
|
|
* Couldn't create the pid file. Probably it already exists.
|
|
*/
|
|
if ((errno != EEXIST && errno != EACCES) || ntries > 100)
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not create lock file \"%s\": %m", filename)));
|
|
|
|
/*
|
|
* Read the file to get the old owner's PID. Note race condition
|
|
* here: file might have been deleted since we tried to create it.
|
|
*/
|
|
fd = open(filename, O_RDONLY, 0600);
|
|
|
|
if (fd < 0) {
|
|
if (errno == ENOENT)
|
|
continue; /* race condition; try again */
|
|
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not open lock file \"%s\": %m", filename)));
|
|
}
|
|
|
|
pgstat_report_waitevent(WAIT_EVENT_LOCK_FILE_CREATE_READ);
|
|
if ((len = read(fd, buffer, sizeof(buffer) - 1)) < 0)
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not read lock file \"%s\": %m", filename)));
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
close(fd);
|
|
|
|
buffer[len] = '\0';
|
|
encoded_pid = atoi(buffer);
|
|
|
|
/* if pid < 0, the pid is for openGauss, not postmaster */
|
|
other_pid = (pid_t)((encoded_pid < 0) ? -encoded_pid : encoded_pid);
|
|
|
|
if (other_pid <= 0) {
|
|
struct stat filenameStat;
|
|
|
|
if (lstat(filename, &filenameStat) >= 0) {
|
|
if (0 == filenameStat.st_size) {
|
|
if (remove(filename) < 0)
|
|
ereport(FATAL,
|
|
(errcode_for_file_access(),
|
|
errmsg("bogus lock file \"%s\",could not unlink it : %m", filename)));
|
|
|
|
continue;
|
|
}
|
|
}
|
|
ereport(FATAL,
|
|
(errmsg("bogus data in lock file \"%s\": \"%s\", please kill the "
|
|
"instance process, than remove the damaged lock file",
|
|
filename,
|
|
buffer)));
|
|
}
|
|
|
|
/*
|
|
* Check to see if the other process still exists
|
|
*
|
|
* Per discussion above, my_pid, my_p_pid, and my_gp_pid can be
|
|
* ignored as false matches.
|
|
*
|
|
* Normally kill() will fail with ESRCH if the given PID doesn't
|
|
* exist.
|
|
*
|
|
* We can treat the EPERM-error case as okay because that error
|
|
* implies that the existing process has a different userid than we
|
|
* do, which means it cannot be a competing postmaster. A postmaster
|
|
* cannot successfully attach to a data directory owned by a userid
|
|
* other than its own. (This is now checked directly in
|
|
* checkDataDir(), but has been true for a long time because of the
|
|
* restriction that the data directory isn't group- or
|
|
* world-accessible.) Also, since we create the lockfiles mode 600,
|
|
* we'd have failed above if the lockfile belonged to another userid
|
|
* --- which means that whatever process kill() is reporting about
|
|
* isn't the one that made the lockfile. (NOTE: this last
|
|
* consideration is the only one that keeps us from blowing away a
|
|
* Unix socket file belonging to an instance of openGauss being run by
|
|
* someone else, at least on machines where /tmp hasn't got a
|
|
* stickybit.)
|
|
*/
|
|
if (other_pid != my_pid && other_pid != my_p_pid && other_pid != my_gp_pid) {
|
|
if (kill(other_pid, 0) == 0 || (errno != ESRCH && errno != EPERM)) {
|
|
/* lockfile belongs to a live process */
|
|
#ifndef WIN32
|
|
if (IsMyPostmasterPid(other_pid, t_thrd.proc_cxt.DataDir))
|
|
#endif
|
|
{
|
|
ReportAlarmDataInstLockFileExist();
|
|
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_LOCK_FILE_EXISTS),
|
|
errmsg("lock file \"%s\" already exists", filename),
|
|
isDDLock
|
|
? ((encoded_pid < 0)
|
|
? errhint("Is another openGauss (PID %d) running in data directory \"%s\"?",
|
|
(int)other_pid,
|
|
refName)
|
|
: errhint("Is another postmaster (PID %d) running in data directory \"%s\"?",
|
|
(int)other_pid,
|
|
refName))
|
|
: ((encoded_pid < 0) ? errhint("Is another openGauss (PID %d) \
|
|
using socket file \"%s\"?",
|
|
(int)other_pid,
|
|
refName)
|
|
: errhint("Is another postmaster (PID %d) using socket file \"%s\"?",
|
|
(int)other_pid,
|
|
refName))));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* No, the creating process did not exist. However, it could be that
|
|
* the postmaster crashed (or more likely was kill -9'd by a clueless
|
|
* admin) but has left orphan backends behind. Check for this by
|
|
* looking to see if there is an associated shmem segment that is
|
|
* still in use.
|
|
*
|
|
* Note: because postmaster.pid is written in multiple steps, we might
|
|
* not find the shmem ID values in it; we can't treat that as an
|
|
* error.
|
|
*/
|
|
if (isDDLock != false) {
|
|
char* ptr = buffer;
|
|
unsigned long id1, id2;
|
|
int lineno;
|
|
|
|
for (lineno = 1; lineno < LOCK_FILE_LINE_SHMEM_KEY; lineno++) {
|
|
if ((ptr = strchr(ptr, '\n')) == NULL)
|
|
break;
|
|
|
|
ptr++;
|
|
}
|
|
|
|
if (ptr != NULL && sscanf_s(ptr, "%lu %lu", &id1, &id2) == 2) {
|
|
if (PGSharedMemoryIsInUse(id1, id2)) {
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_LOCK_FILE_EXISTS),
|
|
errmsg("pre-existing shared memory block "
|
|
"(key %lu, ID %lu) is still in use",
|
|
id1,
|
|
id2),
|
|
errhint("If you're sure there are no old "
|
|
"server processes still running, remove "
|
|
"the shared memory block "
|
|
"or just delete the file \"%s\".",
|
|
filename)));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Looks like nobody's home. Unlink the file and try again to create
|
|
* it. Need a loop because of possible race condition against other
|
|
* would-be creators.
|
|
*/
|
|
if (unlink(filename) < 0)
|
|
ereport(FATAL,
|
|
(errcode_for_file_access(),
|
|
errmsg("could not remove old lock file \"%s\": %m", filename),
|
|
errhint("The file seems accidentally left over, but "
|
|
"it could not be removed. Please remove the file "
|
|
"by hand and try again.")));
|
|
}
|
|
|
|
ReportResumeDataInstLockFileExist();
|
|
|
|
/*
|
|
* Successfully created the file, now fill it. See comment in miscadmin.h
|
|
* about the contents. Note that we write the same first five lines into
|
|
* both datadir and socket lockfiles; although more stuff may get added to
|
|
* the datadir lockfile later.
|
|
*/
|
|
char* unixSocketDir = NULL;
|
|
char* pghost = gs_getenv_r("PGHOST");
|
|
if (pghost != NULL) {
|
|
check_backend_env(pghost);
|
|
}
|
|
|
|
if (*g_instance.attr.attr_network.UnixSocketDir != '\0') {
|
|
unixSocketDir = g_instance.attr.attr_network.UnixSocketDir;
|
|
} else {
|
|
if (pghost != NULL && *(pghost) != '\0') {
|
|
unixSocketDir = pghost;
|
|
} else {
|
|
unixSocketDir = DEFAULT_PGSOCKET_DIR;
|
|
}
|
|
}
|
|
|
|
int rc = snprintf_s(buffer,
|
|
sizeof(buffer),
|
|
sizeof(buffer) - 1,
|
|
"%d\n%s\n%ld\n%d\n%s\n",
|
|
amPostmaster ? (int)my_pid : -((int)my_pid),
|
|
t_thrd.proc_cxt.DataDir,
|
|
(long)t_thrd.proc_cxt.MyStartTime,
|
|
g_instance.attr.attr_network.PostPortNumber,
|
|
#ifdef HAVE_UNIX_SOCKETS
|
|
unixSocketDir
|
|
#else
|
|
""
|
|
#endif
|
|
);
|
|
|
|
securec_check_ss(rc, "\0", "\0");
|
|
|
|
/*
|
|
* In a standalone backend, the next line (LOCK_FILE_LINE_LISTEN_ADDR)
|
|
* will never receive data, so fill it in as empty now.
|
|
*/
|
|
if (isDDLock && !amPostmaster)
|
|
strlcat(buffer, "\n", sizeof(buffer));
|
|
|
|
errno = 0;
|
|
|
|
pgstat_report_waitevent(WAIT_EVENT_LOCK_FILE_CREATE_WRITE);
|
|
if (strlen(buffer) > 0) {
|
|
if ((unsigned int)(write(fd, buffer, strlen(buffer))) != strlen(buffer)) {
|
|
int save_errno = errno;
|
|
|
|
close(fd);
|
|
(void)unlink(filename);
|
|
/* if write didn't set errno, assume problem is no disk space */
|
|
errno = save_errno ? save_errno : ENOSPC;
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not write lock file \"%s\": %m", filename)));
|
|
}
|
|
}
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
|
|
pgstat_report_waitevent(WAIT_EVENT_LOCK_FILE_CREATE_SYNC);
|
|
if (pg_fsync(fd) != 0) {
|
|
int save_errno = errno;
|
|
|
|
close(fd);
|
|
(void)unlink(filename);
|
|
errno = save_errno;
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not write lock file \"%s\": %m", filename)));
|
|
}
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
|
|
if (close(fd) != 0) {
|
|
int save_errno = errno;
|
|
|
|
(void)unlink(filename);
|
|
errno = save_errno;
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not write lock file \"%s\": %m", filename)));
|
|
}
|
|
|
|
/*
|
|
* Arrange for automatic removal of lockfile at proc_exit.
|
|
*/
|
|
{
|
|
char* ptr = NULL;
|
|
ptr = MemoryContextStrdup(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_EXECUTOR), filename);
|
|
on_proc_exit(UnlinkLockFile, PointerGetDatum(ptr));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create the data directory lockfile.
|
|
*
|
|
* When this is called, we must have already switched the working
|
|
* directory to t_thrd.proc_cxt.DataDir, so we can just use a relative path. This
|
|
* helps ensure that we are locking the directory we should be.
|
|
*/
|
|
void CreateDataDirLockFile(bool amPostmaster)
|
|
{
|
|
CreateLockFile(DIRECTORY_LOCK_FILE, amPostmaster, true, t_thrd.proc_cxt.DataDir);
|
|
}
|
|
|
|
/*
|
|
* Create a lockfile for the specified Unix socket file.
|
|
*/
|
|
void CreateSocketLockFile(const char* socketfile, bool amPostmaster, bool is_create_psql_sock)
|
|
{
|
|
char lockfile[MAXPGPATH];
|
|
|
|
int rc = snprintf_s(lockfile, sizeof(lockfile), sizeof(lockfile) - 1, "%s.lock", socketfile);
|
|
securec_check_ss(rc, "\0", "\0");
|
|
|
|
CreateLockFile(lockfile, amPostmaster, false, socketfile);
|
|
/* Save name of lockfile for TouchSocketLockFile */
|
|
errno_t rcs = strcpy_s((is_create_psql_sock ? u_sess->misc_cxt.socketLockFile : u_sess->misc_cxt.hasocketLockFile),
|
|
MAXPGPATH,
|
|
lockfile);
|
|
securec_check_c(rcs, "\0", "\0");
|
|
}
|
|
|
|
/*
|
|
* TouchSocketLockFileInternel & TouchSocketLockFile -- mark socket lock file as recently accessed
|
|
*
|
|
* This routine should be called every so often to ensure that the lock file
|
|
* has a recent mod or access date. That saves it
|
|
* from being removed by overenthusiastic /tmp-directory-cleaner daemons.
|
|
* (Another reason we should never have put the socket file in /tmp...)
|
|
*/
|
|
void TouchSocketLockFileInternel(const char* socketLockFile)
|
|
{
|
|
/* Do nothing if we did not create a socket... */
|
|
if (socketLockFile[0] != '\0') {
|
|
/*
|
|
* utime() is POSIX standard, utimes() is a common alternative; if we
|
|
* have neither, fall back to actually reading the file (which only
|
|
* sets the access time not mod time, but that should be enough in
|
|
* most cases). In all paths, we ignore errors.
|
|
*/
|
|
#ifdef HAVE_UTIME
|
|
utime(socketLockFile, NULL);
|
|
#else /* !HAVE_UTIME */
|
|
#ifdef HAVE_UTIMES
|
|
utimes(socketLockFile, NULL);
|
|
#else /* !HAVE_UTIMES */
|
|
int fd = -1;
|
|
char buffer[1];
|
|
|
|
fd = open(socketLockFile, O_RDONLY | PG_BINARY, 0);
|
|
|
|
if (fd >= 0) {
|
|
read(fd, buffer, sizeof(buffer));
|
|
close(fd);
|
|
}
|
|
|
|
#endif /* HAVE_UTIMES */
|
|
#endif /* HAVE_UTIME */
|
|
}
|
|
}
|
|
|
|
void TouchSocketLockFile(void)
|
|
{
|
|
TouchSocketLockFileInternel(u_sess->misc_cxt.socketLockFile);
|
|
TouchSocketLockFileInternel(u_sess->misc_cxt.hasocketLockFile);
|
|
}
|
|
|
|
/*
|
|
* Add (or replace) a line in the data directory lock file.
|
|
* The given string should not include a trailing newline.
|
|
*
|
|
* Caution: this erases all following lines. In current usage that is OK
|
|
* because lines are added in order. We could improve it if needed.
|
|
*/
|
|
void AddToDataDirLockFile(int target_line, const char* str)
|
|
{
|
|
int fd = -1;
|
|
int len;
|
|
int lineno;
|
|
char* ptr = NULL;
|
|
char buffer[BLCKSZ];
|
|
|
|
fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
|
|
|
|
if (fd < 0) {
|
|
ereport(LOG, (errcode_for_file_access(), errmsg("could not open file \"%s\": %m", DIRECTORY_LOCK_FILE)));
|
|
return;
|
|
}
|
|
|
|
pgstat_report_waitevent(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_READ);
|
|
len = read(fd, buffer, sizeof(buffer) - 1);
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
|
|
if (len < 0) {
|
|
ereport(LOG, (errcode_for_file_access(), errmsg("could not read from file \"%s\": %m", DIRECTORY_LOCK_FILE)));
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
buffer[len] = '\0';
|
|
|
|
/*
|
|
* Skip over lines we are not supposed to rewrite.
|
|
*/
|
|
ptr = buffer;
|
|
|
|
for (lineno = 1; lineno < target_line; lineno++) {
|
|
if ((ptr = strchr(ptr, '\n')) == NULL) {
|
|
ereport(LOG,
|
|
(errmsg("incomplete data in \"%s\": found only %d newlines while trying to add line %d",
|
|
DIRECTORY_LOCK_FILE,
|
|
lineno - 1,
|
|
target_line)));
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
ptr++;
|
|
}
|
|
|
|
/*
|
|
* Write or rewrite the target line.
|
|
*/
|
|
int rcs = snprintf_s(ptr, buffer + sizeof(buffer) - ptr, buffer + sizeof(buffer) - ptr - 1, "%s\n", str);
|
|
securec_check_ss(rcs, "\0", "\0");
|
|
|
|
/*
|
|
* And rewrite the data. Since we write in a single kernel call, this
|
|
* update should appear atomic to onlookers.
|
|
*/
|
|
len = strlen(buffer);
|
|
errno = 0;
|
|
|
|
pgstat_report_waitevent(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_WRITE);
|
|
if (lseek(fd, (off_t)0, SEEK_SET) != 0 || (int)write(fd, buffer, len) != len) {
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
/* if write didn't set errno, assume problem is no disk space */
|
|
if (errno == 0)
|
|
errno = ENOSPC;
|
|
|
|
ereport(LOG, (errcode_for_file_access(), errmsg("could not write to file \"%s\": %m", DIRECTORY_LOCK_FILE)));
|
|
close(fd);
|
|
return;
|
|
}
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
|
|
pgstat_report_waitevent(WAIT_EVENT_LOCK_FILE_ADDTODATADIR_SYNC);
|
|
if (pg_fsync(fd) != 0) {
|
|
ereport(LOG, (errcode_for_file_access(), errmsg("could not write to file \"%s\": %m", DIRECTORY_LOCK_FILE)));
|
|
}
|
|
pgstat_report_waitevent(WAIT_EVENT_END);
|
|
|
|
if (close(fd) != 0) {
|
|
ereport(LOG, (errcode_for_file_access(), errmsg("could not write to file \"%s\": %m", DIRECTORY_LOCK_FILE)));
|
|
}
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------
|
|
* Version checking support
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* Determine whether the PG_VERSION file in directory `path' indicates
|
|
* a data version compatible with the version of this program.
|
|
*
|
|
* If compatible, return. Otherwise, ereport(FATAL).
|
|
*/
|
|
void ValidatePgVersion(const char* path)
|
|
{
|
|
char full_path[MAXPGPATH];
|
|
FILE* file = NULL;
|
|
int ret;
|
|
long file_major, file_minor;
|
|
long my_major = 0, my_minor = 0;
|
|
char* endptr = NULL;
|
|
const char* version_string = PG_VERSION;
|
|
errno_t rc;
|
|
|
|
my_major = strtol(version_string, &endptr, 10);
|
|
|
|
if (*endptr == '.')
|
|
my_minor = strtol(endptr + 1, NULL, 10);
|
|
|
|
rc = snprintf_s(full_path, sizeof(full_path), sizeof(full_path) - 1, "%s/PG_VERSION", path);
|
|
securec_check_intval(rc, , );
|
|
|
|
file = AllocateFile(full_path, "r");
|
|
|
|
if (file == NULL) {
|
|
if (errno == ENOENT)
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("\"%s\" is not a valid data directory", path),
|
|
errdetail("File \"%s\" is missing.", full_path)));
|
|
else
|
|
ereport(FATAL, (errcode_for_file_access(), errmsg("could not open file \"%s\": %m", full_path)));
|
|
}
|
|
|
|
ret = fscanf_s(file, "%ld.%ld", &file_major, &file_minor);
|
|
|
|
if (ret != 2)
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("\"%s\" is not a valid data directory", path),
|
|
errdetail("File \"%s\" does not contain valid data.", full_path),
|
|
errhint("You might need to initdb.")));
|
|
|
|
FreeFile(file);
|
|
|
|
if (my_major != file_major || my_minor != file_minor)
|
|
ereport(FATAL,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("database files are incompatible with server"),
|
|
errdetail("The data directory was initialized by PostgreSQL version %ld.%ld, "
|
|
"which is not compatible with this version %s.",
|
|
file_major,
|
|
file_minor,
|
|
version_string)));
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------
|
|
* Library preload support
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
/*
|
|
* load the shared libraries listed in 'libraries'
|
|
*
|
|
* 'gucname': name of GUC variable, for error reports
|
|
* 'restricted': if true, force libraries to be in $libdir/plugins/
|
|
*/
|
|
static void load_libraries(const char* libraries, const char* gucname, bool restricted)
|
|
{
|
|
char* rawstring = NULL;
|
|
List* elemlist = NULL;
|
|
int elevel;
|
|
ListCell* l = NULL;
|
|
|
|
if (libraries == NULL || libraries[0] == '\0') {
|
|
return; /* nothing to do */
|
|
}
|
|
|
|
/* Need a modifiable copy of string */
|
|
rawstring = pstrdup(libraries);
|
|
|
|
/* Parse string into list of identifiers */
|
|
if (!SplitIdentifierString(rawstring, ',', &elemlist)) {
|
|
/* syntax error in list */
|
|
pfree(rawstring);
|
|
list_free(elemlist);
|
|
ereport(LOG, (errcode(ERRCODE_SYNTAX_ERROR), errmsg("invalid list syntax in parameter \"%s\"", gucname)));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Choose notice level: avoid repeat messages when re-loading a library
|
|
* that was preloaded into the postmaster. (Only possible in EXEC_BACKEND
|
|
* configurations)
|
|
*/
|
|
#ifdef EXEC_BACKEND
|
|
|
|
if (IsUnderPostmaster && u_sess->misc_cxt.process_shared_preload_libraries_in_progress)
|
|
elevel = DEBUG2;
|
|
else
|
|
#endif
|
|
elevel = LOG;
|
|
|
|
foreach (l, elemlist) {
|
|
char* tok = (char*)lfirst(l);
|
|
char* filename = NULL;
|
|
errno_t rc;
|
|
|
|
filename = pstrdup(tok);
|
|
if (strcmp(filename, "security_plugin") == 0 && WorkingGrandVersionNum < 92076) {
|
|
continue;
|
|
}
|
|
canonicalize_path(filename);
|
|
|
|
/* If restricting, insert $libdir/plugins if not mentioned already */
|
|
if (restricted && first_dir_separator(filename) == NULL) {
|
|
char* expanded = NULL;
|
|
|
|
expanded = (char*)palloc(strlen("$libdir/plugins/") + strlen(filename) + 1);
|
|
rc = strcpy_s(expanded, strlen("$libdir/plugins/") + strlen(filename) + 1, "$libdir/plugins/");
|
|
securec_check_c(rc, "\0", "\0");
|
|
rc = strcat_s(expanded, strlen("$libdir/plugins/") + strlen(filename) + 1, filename);
|
|
securec_check_c(rc, "\0", "\0");
|
|
pfree(filename);
|
|
filename = expanded;
|
|
}
|
|
|
|
load_file(filename, restricted);
|
|
ereport(elevel, (errmsg("loaded library \"%s\"", filename)));
|
|
pfree(filename);
|
|
}
|
|
|
|
pfree(rawstring);
|
|
list_free(elemlist);
|
|
}
|
|
|
|
/*
|
|
* process shared preloaded libraries internal
|
|
*/
|
|
void
|
|
process_shared_preload_libraries_internal(void)
|
|
{
|
|
#ifdef ENABLE_MULTIPLE_NODES
|
|
if (is_streaming_engine_available()) {
|
|
load_libraries("streaming", "shared_preload_libraries", false);
|
|
}
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* process any libraries that should be preloaded at postmaster start
|
|
*/
|
|
void process_shared_preload_libraries(void)
|
|
{
|
|
u_sess->misc_cxt.process_shared_preload_libraries_in_progress = true;
|
|
load_libraries(g_instance.attr.attr_common.shared_preload_libraries_string, "shared_preload_libraries", false);
|
|
process_shared_preload_libraries_internal();
|
|
u_sess->misc_cxt.process_shared_preload_libraries_in_progress = false;
|
|
}
|
|
|
|
/*
|
|
* process any libraries that should be preloaded at backend start
|
|
*/
|
|
void process_local_preload_libraries(void)
|
|
{
|
|
load_libraries(u_sess->attr.attr_common.local_preload_libraries_string, "local_preload_libraries", true);
|
|
}
|
|
|
|
void pg_bindtextdomain(const char* domain)
|
|
{
|
|
#ifdef ENABLE_NLS
|
|
|
|
if (my_exec_path[0] != '\0') {
|
|
char locale_path[MAXPGPATH];
|
|
|
|
get_locale_path(my_exec_path, locale_path);
|
|
bindtextdomain(domain, locale_path);
|
|
pg_bind_textdomain_codeset(domain);
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
// reset u_sess->misc_cxt.Pseudo_CurrentUserId's reference to u_sess->misc_cxt.CurrentUserId, always called
|
|
// when the stored procedure completed.
|
|
void Reset_Pseudo_CurrentUserId(void)
|
|
{
|
|
u_sess->misc_cxt.Pseudo_CurrentUserId = &u_sess->misc_cxt.CurrentUserId;
|
|
}
|
|
|
|
/*
|
|
* The backend_version is recorded in session_param.
|
|
* During connection obtaining, the agent_send_connection_params_parallel function
|
|
* is used to synchronize the version number.
|
|
*/
|
|
void register_backend_version(uint32 backend_version){
|
|
if (IsBootstrapProcessingMode() || IsInitProcessingMode() || !IS_PGXC_COORDINATOR) {
|
|
return;
|
|
}
|
|
char sql_tmp[CHAR_SIZE];
|
|
errno_t rc;
|
|
int ret = 0;
|
|
rc = memset_s(sql_tmp, CHAR_SIZE, 0, CHAR_SIZE);
|
|
securec_check_c(rc, "\0", "\0");
|
|
if (backend_version > 0) {
|
|
ret = snprintf_s(sql_tmp, CHAR_SIZE, CHAR_SIZE - 1, "set backend_version = %d;", backend_version);
|
|
} else {
|
|
ereport(ERROR, (errcode(ERRCODE_SET_QUERY), errmsg("backend_version is a error value: %d", backend_version)));
|
|
}
|
|
securec_check_ss_c(ret, "\0", "\0");
|
|
if (PoolManagerSetCommand(POOL_CMD_GLOBAL_SET, sql_tmp, "backend_version") < 0){
|
|
ereport(ERROR, (errmodule(MOD_TRANS_HANDLE), errcode(ERRCODE_SET_QUERY), errmsg("ERROR SET backend_version")));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check whether the version contains the backend_version parameter.
|
|
*/
|
|
bool contain_backend_version(uint32 version_number) {
|
|
return ((version_number >= V5R1C20_BACKEND_VERSION_NUM &&
|
|
version_number < V5R2C00_START_VERSION_NUM) ||
|
|
(version_number >= V5R2C00_BACKEND_VERSION_NUM));
|
|
} |