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Make use of xlog_internal.h's macros in WAL-related utilities. 

Commit 179cdd09 added macros to check if a filename is a WAL segment
or other such file. However there were still some instances of the
strlen + strspn combination to check for that in WAL-related utilities
like pg_archivecleanup. Those checks can be replaced with the macros.

This patch makes use of the macros in those utilities and
which would make the code a bit easier to read.

Back-patch to 9.5.

Michael Paquier
This commit is contained in:
Fujii Masao 2015-07-02 10:35:38 +09:00
parent 1e24cf645d
commit fb174687f7
4 changed files with 33 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
contrib/pg_standby/pg_standby.c
View File

@ -32,6 +32,8 @@
#include "pg_getopt.h"
#include "access/xlog_internal.h"
const char *progname;
/* Options and defaults */
@ -57,7 +59,7 @@ char *restartWALFileName; /* the file from which we can restart restore */
char *priorWALFileName; /* the file we need to get from archive */
char WALFilePath[MAXPGPATH]; /* the file path including archive */
char restoreCommand[MAXPGPATH]; /* run this to restore */
char exclusiveCleanupFileName[MAXPGPATH]; /* the file we need to
char exclusiveCleanupFileName[MAXFNAMELEN]; /* the file we need to
* get from archive */
/*
@ -113,11 +115,6 @@ struct stat stat_buf;
* folded in to later versions of this program.
*/
#define XLOG_DATA_FNAME_LEN 24
/* Reworked from access/xlog_internal.h */
#define XLogFileName(fname, tli, log, seg) \
snprintf(fname, XLOG_DATA_FNAME_LEN + 1, "%08X%08X%08X", tli, log, seg)
/*
* Initialize allows customized commands into the warm standby program.
*
@ -182,10 +179,7 @@ CustomizableNextWALFileReady()
* If it's a backup file, return immediately. If it's a regular file
* return only if it's the right size already.
*/
if (strlen(nextWALFileName) > 24 &&
strspn(nextWALFileName, "0123456789ABCDEF") == 24 &&
strcmp(nextWALFileName + strlen(nextWALFileName) - strlen(".backup"),
".backup") == 0)
if (IsBackupHistoryFileName(nextWALFileName))
{
nextWALFileType = XLOG_BACKUP_LABEL;
return true;
@ -261,8 +255,7 @@ CustomizableCleanupPriorWALFiles(void)
* are not removed in the order they were originally written,
* in case this worries you.
*/
if (strlen(xlde->d_name) == XLOG_DATA_FNAME_LEN &&
strspn(xlde->d_name, "0123456789ABCDEF") == XLOG_DATA_FNAME_LEN &&
if (IsXLogFileName(xlde->d_name) &&
strcmp(xlde->d_name + 8, exclusiveCleanupFileName + 8) < 0)
{
#ifdef WIN32
@ -366,7 +359,7 @@ SetWALFileNameForCleanup(void)
}
}
XLogFileName(exclusiveCleanupFileName, tli, log, seg);
XLogFileNameById(exclusiveCleanupFileName, tli, log, seg);
return cleanup;
}
@ -740,10 +733,7 @@ main(int argc, char **argv)
* Check for initial history file: always the first file to be requested
* It's OK if the file isn't there - all other files need to wait
*/
if (strlen(nextWALFileName) > 8 &&
strspn(nextWALFileName, "0123456789ABCDEF") == 8 &&
strcmp(nextWALFileName + strlen(nextWALFileName) - strlen(".history"),
".history") == 0)
if (IsTLHistoryFileName(nextWALFileName))
{
nextWALFileType = XLOG_HISTORY;
if (RestoreWALFileForRecovery())

22
src/bin/pg_archivecleanup/pg_archivecleanup.c
View File

@ -21,6 +21,8 @@
#include "pg_getopt.h"
#include "access/xlog_internal.h"
const char *progname;
/* Options and defaults */
@ -31,7 +33,7 @@ char *additional_ext = NULL; /* Extension to remove from filenames */
char *archiveLocation; /* where to find the archive? */
char *restartWALFileName; /* the file from which we can restart restore */
char WALFilePath[MAXPGPATH]; /* the file path including archive */
char exclusiveCleanupFileName[MAXPGPATH]; /* the oldest file we
char exclusiveCleanupFileName[MAXFNAMELEN]; /* the oldest file we
* want to remain in
* archive */
@ -51,12 +53,6 @@ char exclusiveCleanupFileName[MAXPGPATH]; /* the oldest file we
* folded in to later versions of this program.
*/
#define XLOG_DATA_FNAME_LEN 24
/* Reworked from access/xlog_internal.h */
#define XLogFileName(fname, tli, log, seg) \
snprintf(fname, XLOG_DATA_FNAME_LEN + 1, "%08X%08X%08X", tli, log, seg)
#define XLOG_BACKUP_FNAME_LEN 40
/*
* Initialize allows customized commands into the archive cleanup program.
*
@ -110,7 +106,7 @@ CleanupPriorWALFiles(void)
{
/*
* Truncation is essentially harmless, because we skip names of
* length other than XLOG_DATA_FNAME_LEN. (In principle, one
* length other than XLOG_FNAME_LEN. (In principle, one
* could use a 1000-character additional_ext and get trouble.)
*/
strlcpy(walfile, xlde->d_name, MAXPGPATH);
@ -129,8 +125,7 @@ CleanupPriorWALFiles(void)
* file. Note that this means files are not removed in the order
* they were originally written, in case this worries you.
*/
if (strlen(walfile) == XLOG_DATA_FNAME_LEN &&
strspn(walfile, "0123456789ABCDEF") == XLOG_DATA_FNAME_LEN &&
if (IsXLogFileName(walfile) &&
strcmp(walfile + 8, exclusiveCleanupFileName + 8) < 0)
{
/*
@ -202,13 +197,12 @@ SetWALFileNameForCleanup(void)
* 000000010000000000000010.00000020.backup is after
* 000000010000000000000010.
*/
if (strlen(restartWALFileName) == XLOG_DATA_FNAME_LEN &&
strspn(restartWALFileName, "0123456789ABCDEF") == XLOG_DATA_FNAME_LEN)
if (IsXLogFileName(restartWALFileName))
{
strcpy(exclusiveCleanupFileName, restartWALFileName);
fnameOK = true;
}
else if (strlen(restartWALFileName) == XLOG_BACKUP_FNAME_LEN)
else if (IsBackupHistoryFileName(restartWALFileName))
{
int args;
uint32 tli = 1,
@ -225,7 +219,7 @@ SetWALFileNameForCleanup(void)
* Use just the prefix of the filename, ignore everything after
* first period
*/
XLogFileName(exclusiveCleanupFileName, tli, log, seg);
XLogFileNameById(exclusiveCleanupFileName, tli, log, seg);
}
}

11
src/bin/pg_resetxlog/pg_resetxlog.c
View File

@ -261,7 +261,7 @@ main(int argc, char *argv[])
break;
case 'l':
if (strspn(optarg, "01234567890ABCDEFabcdef") != 24)
if (strspn(optarg, "01234567890ABCDEFabcdef") != XLOG_FNAME_LEN)
{
fprintf(stderr, _("%s: invalid argument for option %s\n"), progname, "-l");
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
@ -976,8 +976,7 @@ KillExistingXLOG(void)
while (errno = 0, (xlde = readdir(xldir)) != NULL)
{
if (strlen(xlde->d_name) == 24 &&
strspn(xlde->d_name, "0123456789ABCDEF") == 24)
if (IsXLogFileName(xlde->d_name))
{
snprintf(path, MAXPGPATH, "%s/%s", XLOGDIR, xlde->d_name);
if (unlink(path) < 0)
@ -1027,9 +1026,9 @@ KillExistingArchiveStatus(void)
while (errno = 0, (xlde = readdir(xldir)) != NULL)
{
if (strspn(xlde->d_name, "0123456789ABCDEF") == 24 &&
(strcmp(xlde->d_name + 24, ".ready") == 0 ||
strcmp(xlde->d_name + 24, ".done") == 0))
if (strspn(xlde->d_name, "0123456789ABCDEF") == XLOG_FNAME_LEN &&
(strcmp(xlde->d_name + XLOG_FNAME_LEN, ".ready") == 0 ||
strcmp(xlde->d_name + XLOG_FNAME_LEN, ".done") == 0))
{
snprintf(path, MAXPGPATH, "%s/%s", ARCHSTATDIR, xlde->d_name);
if (unlink(path) < 0)

19
src/include/access/xlog_internal.h
View File

@ -137,13 +137,20 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
*/
#define MAXFNAMELEN 64
/* Length of XLog file name */
#define XLOG_FNAME_LEN 24
#define XLogFileName(fname, tli, logSegNo) \
snprintf(fname, MAXFNAMELEN, "%08X%08X%08X", tli, \
(uint32) ((logSegNo) / XLogSegmentsPerXLogId), \
(uint32) ((logSegNo) % XLogSegmentsPerXLogId))
#define XLogFileNameById(fname, tli, log, seg) \
snprintf(fname, MAXFNAMELEN, "%08X%08X%08X", tli, log, seg)
#define IsXLogFileName(fname) \
(strlen(fname) == 24 && strspn(fname, "0123456789ABCDEF") == 24)
(strlen(fname) == XLOG_FNAME_LEN && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN)
/*
* XLOG segment with .partial suffix. Used by pg_receivexlog and at end of
@ -151,9 +158,9 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
* be complete yet.
*/
#define IsPartialXLogFileName(fname) \
(strlen(fname) == 24 + strlen(".partial") && \
strspn(fname, "0123456789ABCDEF") == 24 && \
strcmp((fname) + 24, ".partial") == 0)
(strlen(fname) == XLOG_FNAME_LEN + strlen(".partial") && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \
strcmp((fname) + XLOG_FNAME_LEN, ".partial") == 0)
#define XLogFromFileName(fname, tli, logSegNo) \
do { \
@ -188,8 +195,8 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
(uint32) ((logSegNo) % XLogSegmentsPerXLogId), offset)
#define IsBackupHistoryFileName(fname) \
(strlen(fname) > 24 && \
strspn(fname, "0123456789ABCDEF") == 24 && \
(strlen(fname) > XLOG_FNAME_LEN && \
strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \
strcmp((fname) + strlen(fname) - strlen(".backup"), ".backup") == 0)
#define BackupHistoryFilePath(path, tli, logSegNo, offset) \