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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <limits.h>
#include <errno.h>
#define __user
#include "gfs_ioctl.h"
#include "gfs_tool.h"
#define SIZE (4096)
/**
* get_tune - print out the current tuneable parameters for a filesystem
* @argc:
* @argv:
*
*/
void
get_tune(int argc, char **argv)
{
int fd;
char *gi_argv[] = { "get_tune" };
struct gfs_ioctl gi;
char str[SIZE], str2[SIZE];
char **lines, **l;
if (optind == argc)
die("Usage: gfs_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_gfs(fd, argv[optind]);
gi.gi_argc = 1;
gi.gi_argv = gi_argv;
gi.gi_data = str;
gi.gi_size = SIZE;
if (ioctl(fd, GFS_IOCTL_SUPER, &gi) < 0)
die("error doing get_tune: %s\n",
strerror(errno));
close(fd);
strcpy(str2, str);
lines = str2lines(str2);
for (l = lines; **l; l++) {
char *p;
for (p = *l; *p; p++)
if (*p == ' ') {
*p++ = 0;
break;
}
if (strcmp(*l, "version") == 0)
continue;
if (strcmp(*l, "quota_scale_num") == 0) {
printf("quota_scale = %.4f (%u, %u)\n",
(double)name2u32(str, "quota_scale_num") / name2u32(str, "quota_scale_den"),
name2u32(str, "quota_scale_num"), name2u32(str, "quota_scale_den"));
continue;
}
if (strcmp(*l, "quota_scale_den") == 0)
continue;
printf("%s = %s\n", *l, p);
}
}
/**
* set_tune - set a tuneable parameter
* @argc:
* @argv:
*
*/
void
set_tune(int argc, char **argv)
{
char *mp, *param, *value;
int fd;
struct gfs_ioctl gi;
char buf[256];
if (optind == argc)
die("Usage: gfs_tool settune <mountpoint> <parameter> <value>\n");
mp = argv[optind++];
if (optind == argc)
die("Usage: gfs_tool settune <mountpoint> <parameter> <value>\n");
param = argv[optind++];
if (optind == argc)
die("Usage: gfs_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_gfs(fd, 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;
}
{
char *argv[] = { "set_tune", param, value };
gi.gi_argc = 3;
gi.gi_argv = argv;
if (ioctl(fd, GFS_IOCTL_SUPER, &gi))
die("can't change tunable parameter %s: %s\n",
param, strerror(errno));
}
close(fd);
}

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