Page MenuHomeClusterLabs Projects
Files F3152918

tune.c
No OneTemporary
Actions

tune.c
View Options

/******************************************************************************
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
** of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <sys/types.h>
#include <linux/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <limits.h>
#include <errno.h>
#include <dirent.h>
#define __user
#include "gfs2_tool.h"
#define SIZE (65536)
/**
* get_tune - print out the current tuneable parameters for a filesystem
* @argc:
* @argv:
*
*/
void
get_tune(int argc, char **argv)
{
int fd;
char path[PATH_MAX];
char *fs;
DIR *d;
struct dirent *de;
double ratio;
unsigned int num, den;
if (optind == argc)
die("Usage: gfs2_tool gettune <mountpoint>\n");
fd = open(argv[optind], O_RDONLY);
if (fd < 0)
die("can't open file %s: %s\n",
argv[optind], strerror(errno));
check_for_gfs2(fd, argv[optind]);
close(fd);
fs = mp2fsname(argv[optind]);
memset(path, 0, PATH_MAX);
snprintf(path, PATH_MAX - 1, "%s/%s/tune", SYS_BASE, fs);
d = opendir(path);
if (!d)
die("can't open %s: %s\n", path, strerror(errno));
while((de = readdir(d))) {
if (de->d_name[0] == '.')
continue;
snprintf(path, PATH_MAX - 1, "tune/%s", de->d_name);
if (strcmp(de->d_name, "quota_scale") == 0) {
sscanf(get_sysfs(fs, "tune/quota_scale"), "%u %u",
&num, &den);
ratio = (double)num / den;
printf("quota_scale = %.4f (%u, %u)\n", ratio, num,
den);
} else
printf("%s = %s\n", de->d_name, get_sysfs(fs, path));
}
closedir(d);
}
/**
* set_tune - set a tuneable parameter
* @argc:
* @argv:
*
*/
void
set_tune(int argc, char **argv)
{
char *mp, *param, *value;
int fd;
char tune_base[SIZE] = "tune/";
char buf[256];
char *fs;
if (optind == argc)
die("Usage: gfs2_tool settune <mountpoint> <parameter> <value>\n");
mp = argv[optind++];
if (optind == argc)
die("Usage: gfs2_tool settune <mountpoint> <parameter> <value>\n");
param = argv[optind++];
if (optind == argc)
die("Usage: gfs2_tool settune <mountpoint> <parameter> <value>\n");
value = argv[optind++];
fd = open(mp, O_RDONLY);
if (fd < 0)
die("can't open file %s: %s\n",
mp, strerror(errno));
check_for_gfs2(fd, mp);
close(fd);
fs = mp2fsname(mp);
if (strcmp(param, "quota_scale") == 0) {
float s;
sscanf(value, "%f", &s);
sprintf(buf, "%u %u", (unsigned int)(s * 10000.0 + 0.5), 10000);
value = buf;
}
set_sysfs(fs, strcat(tune_base, param), value);
}

File Metadata

Mime Type
text/x-c
Expires
Tue, Feb 25, 5:58 AM (1 d, 19 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
1464699
Default Alt Text
tune.c (3 KB)

Event Timeline