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896938d57e
e2fsprogs/misc/tune2fs.c
Theodore Ts'o 896938d57e ChangeLog, Makefile.in, mke2fs.8.in, mke2fs.c, tune2fs.8.in, tune2fs.c: 
tune2fs.c (main): Add a new option -O which allows the user to set and
  	clear certain "safe" filsystem feature flags.  Currently, the only
  	ones which are supported for modification are sparse_superblock and
  	filetype.
  mke2fs.c (PRS): Add new option -O which allows the user to request
  	filesystems with specific filesystem options.  By default on 2.2 and
  	later systems, create filesystems that have both file type information
  	and sparse superblocks.
1999-10-23 01:04:50 +00:00

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/*
* tune2fs.c - Change the file system parameters on
* an unmounted second extended file system
*
* Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
* Laboratoire MASI, Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* Copyright 1995, 1996, 1997 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
/*
* History:
* 93/06/01 - Creation
* 93/10/31 - Added the -c option to change the maximal mount counts
* 93/12/14 - Added -l flag to list contents of superblock
* M.J.E. Mol (marcel@duteca.et.tudelft.nl)
* F.W. ten Wolde (franky@duteca.et.tudelft.nl)
* 93/12/29 - Added the -e option to change errors behavior
* 94/02/27 - Ported to use the ext2fs library
* 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
*/
#include <fcntl.h>
#include <grp.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <linux/ext2_fs.h>
#include "ext2fs/ext2fs.h"
#include "et/com_err.h"
#include "uuid/uuid.h"
#include "e2p/e2p.h"
#include "../version.h"
const char * program_name = "tune2fs";
char * device_name = NULL;
char * new_label = NULL;
char * new_last_mounted = NULL;
char * new_UUID = NULL;
int c_flag = 0;
int C_flag = 0;
int e_flag = 0;
int g_flag = 0;
int i_flag = 0;
int l_flag = 0;
int L_flag = 0;
int m_flag = 0;
int M_flag = 0;
int r_flag = 0;
int s_flag = -1;
int u_flag = 0;
int U_flag = 0;
int max_mount_count, mount_count;
unsigned long interval;
unsigned long reserved_ratio = 0;
unsigned long reserved_blocks = 0;
unsigned short errors;
unsigned long resgid = 0;
unsigned long resuid = 0;
#ifndef HAVE_STRCASECMP
static int strcasecmp (char *s1, char *s2)
{
while (*s1 && *s2) {
int ch1 = *s1++, ch2 = *s2++;
if (isupper (ch1))
ch1 = tolower (ch1);
if (isupper (ch2))
ch2 = tolower (ch2);
if (ch1 != ch2)
return ch1 - ch2;
}
return *s1 ? 1 : *s2 ? -1 : 0;
}
#endif
static void usage(void)
{
fprintf(stderr, "Usage: %s [-c max-mounts-count] [-e errors-behavior] "
"[-g group]\n"
"\t[-i interval[d|m|w]] [-l] [-s] [-m reserved-blocks-percent]\n"
"\t[-r reserved-blocks-count] [-u user] [-C mount-count]\n"
"\t[-L volume-label] [-M last-mounted-dir] [-U UUID]\n"
"\t[-O [-]feature[,...]] device\n", program_name);
exit (1);
}
static __u32 ok_features[3] = {
0, /* Compat */
EXT2_FEATURE_INCOMPAT_FILETYPE, /* Incompat */
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */
};
static const char *please_fsck = "Please run e2fsck on the filesystem.\n";
int main (int argc, char ** argv)
{
int c;
char * tmp;
errcode_t retval;
ext2_filsys fs;
struct ext2fs_sb *sb;
struct group * gr;
struct passwd * pw;
int open_flag = 0;
char *features_cmd = 0;
fprintf (stderr, "tune2fs %s, %s for EXT2 FS %s, %s\n",
E2FSPROGS_VERSION, E2FSPROGS_DATE,
EXT2FS_VERSION, EXT2FS_DATE);
if (argc && *argv)
program_name = *argv;
initialize_ext2_error_table();
while ((c = getopt (argc, argv, "c:e:g:i:lm:r:s:u:C:L:M:O:U:")) != EOF)
switch (c)
{
case 'c':
max_mount_count = strtoul (optarg, &tmp, 0);
if (*tmp || max_mount_count > 16000) {
com_err (program_name, 0,
"bad mounts count - %s",
optarg);
usage();
}
c_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'C':
mount_count = strtoul (optarg, &tmp, 0);
if (*tmp || mount_count > 16000) {
com_err (program_name, 0,
"bad mounts count - %s",
optarg);
usage();
}
C_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'e':
if (strcmp (optarg, "continue") == 0)
errors = EXT2_ERRORS_CONTINUE;
else if (strcmp (optarg, "remount-ro") == 0)
errors = EXT2_ERRORS_RO;
else if (strcmp (optarg, "panic") == 0)
errors = EXT2_ERRORS_PANIC;
else {
com_err (program_name, 0,
"bad error behavior - %s",
optarg);
usage();
}
e_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'g':
resgid = strtoul (optarg, &tmp, 0);
if (*tmp) {
gr = getgrnam (optarg);
if (gr == NULL)
tmp = optarg;
else {
resgid = gr->gr_gid;
*tmp =0;
}
}
if (*tmp) {
com_err (program_name, 0,
"bad gid/group name - %s",
optarg);
usage();
}
g_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'i':
interval = strtoul (optarg, &tmp, 0);
switch (*tmp) {
case 's':
tmp++;
break;
case '\0':
case 'd':
case 'D': /* days */
interval *= 86400;
if (*tmp != '\0')
tmp++;
break;
case 'm':
case 'M': /* months! */
interval *= 86400 * 30;
tmp++;
break;
case 'w':
case 'W': /* weeks */
interval *= 86400 * 7;
tmp++;
break;
}
if (*tmp || interval > (365 * 86400)) {
com_err (program_name, 0,
"bad interval - %s", optarg);
usage();
}
i_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'l':
l_flag = 1;
break;
case 'L':
new_label = optarg;
L_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'm':
reserved_ratio = strtoul (optarg, &tmp, 0);
if (*tmp || reserved_ratio > 50) {
com_err (program_name, 0,
"bad reserved block ratio - %s",
optarg);
usage();
}
m_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'M':
new_last_mounted = optarg;
M_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'O':
features_cmd = optarg;
open_flag = EXT2_FLAG_RW;
break;
case 'r':
reserved_blocks = strtoul (optarg, &tmp, 0);
if (*tmp) {
com_err (program_name, 0,
"bad reserved blocks count - %s",
optarg);
usage();
}
r_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 's':
s_flag = atoi(optarg);
open_flag = EXT2_FLAG_RW;
break;
case 'u':
resuid = strtoul (optarg, &tmp, 0);
if (*tmp) {
pw = getpwnam (optarg);
if (pw == NULL)
tmp = optarg;
else {
resuid = pw->pw_uid;
*tmp = 0;
}
}
if (*tmp) {
com_err (program_name, 0,
"bad uid/user name - %s",
optarg);
usage();
}
u_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
case 'U':
new_UUID = optarg;
U_flag = 1;
open_flag = EXT2_FLAG_RW;
break;
default:
usage();
}
if (optind < argc - 1 || optind == argc)
usage();
if (!open_flag && !l_flag)
usage();
device_name = argv[optind];
retval = ext2fs_open (device_name, open_flag, 0, 0,
unix_io_manager, &fs);
if (retval) {
com_err (program_name, retval, "while trying to open %s",
device_name);
printf("Couldn't find valid filesystem superblock.\n");
exit(1);
}
sb = (struct ext2fs_sb *) fs->super;
if (c_flag) {
fs->super->s_max_mnt_count = max_mount_count;
ext2fs_mark_super_dirty(fs);
printf ("Setting maximal mount count to %d\n",
max_mount_count);
}
if (C_flag) {
fs->super->s_mnt_count = mount_count;
ext2fs_mark_super_dirty(fs);
printf ("Setting current mount count to %d\n", mount_count);
}
if (e_flag) {
fs->super->s_errors = errors;
ext2fs_mark_super_dirty(fs);
printf ("Setting error behavior to %d\n", errors);
}
if (g_flag)
#ifdef EXT2_DEF_RESGID
{
fs->super->s_def_resgid = resgid;
ext2fs_mark_super_dirty(fs);
printf ("Setting reserved blocks gid to %lu\n", resgid);
}
#else
com_err (program_name, 0,
"The -g option is not supported by this version -- "
"Recompile with a newer kernel");
#endif
if (i_flag) {
fs->super->s_checkinterval = interval;
ext2fs_mark_super_dirty(fs);
printf ("Setting interval between check %lu seconds\n", interval);
}
if (m_flag) {
fs->super->s_r_blocks_count = (fs->super->s_blocks_count / 100)
* reserved_ratio;
ext2fs_mark_super_dirty(fs);
printf ("Setting reserved blocks percentage to %lu (%u blocks)\n",
reserved_ratio, fs->super->s_r_blocks_count);
}
if (r_flag) {
if (reserved_blocks >= fs->super->s_blocks_count) {
com_err (program_name, 0,
"reserved blocks count is too big (%ul)",
reserved_blocks);
exit (1);
}
fs->super->s_r_blocks_count = reserved_blocks;
ext2fs_mark_super_dirty(fs);
printf ("Setting reserved blocks count to %lu\n",
reserved_blocks);
}
if (s_flag == 1) {
#ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
if (sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
fprintf(stderr, "\nThe filesystem already"
" has spare superblocks.\n");
else {
sb->s_feature_ro_compat |=
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
fs->super->s_state &= ~EXT2_VALID_FS;
ext2fs_mark_super_dirty(fs);
printf("\nSparse superblock flag set. %s",
please_fsck);
}
#else /* !EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
com_err (program_name, 0,
"The -s option is not supported by this version -- "
"Recompile with a newer kernel");
#endif /* EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
}
if (s_flag == 0) {
#ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
if (!(sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
fprintf(stderr, "\nThe filesystem already"
" does not support spare superblocks.\n");
else {
sb->s_feature_ro_compat &=
~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
fs->super->s_state &= ~EXT2_VALID_FS;
fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
ext2fs_mark_super_dirty(fs);
printf("\nSparse superblock flag cleared. %s",
please_fsck);
}
#else /* !EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
com_err (program_name, 0,
"The -s option is not supported by this version -- "
"Recompile with a newer kernel");
#endif /* EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER */
}
if (u_flag)
#ifdef EXT2_DEF_RESUID
{
fs->super->s_def_resuid = resuid;
ext2fs_mark_super_dirty(fs);
printf ("Setting reserved blocks uid to %lu\n", resuid);
}
#else
com_err (program_name, 0,
"The -u option is not supported by this version -- "
"Recompile with a newer kernel");
#endif
if (L_flag) {
if (strlen(new_label) > sizeof(sb->s_volume_name))
fprintf(stderr, "Warning: label too "
"long, truncating.\n");
memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
strncpy(sb->s_volume_name, new_label,
sizeof(sb->s_volume_name));
ext2fs_mark_super_dirty(fs);
}
if (M_flag) {
memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
strncpy(sb->s_last_mounted, new_last_mounted,
sizeof(sb->s_last_mounted));
ext2fs_mark_super_dirty(fs);
}
if (features_cmd) {
int sparse, old_sparse, filetype, old_filetype;
old_sparse = sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
old_filetype = sb->s_feature_incompat &
EXT2_FEATURE_INCOMPAT_FILETYPE;
if (e2p_edit_feature(features_cmd,
&sb->s_feature_compat,
ok_features)) {
fprintf(stderr, "Invalid filesystem option set: %s\n",
features_cmd);
exit(1);
}
sparse = sb->s_feature_ro_compat &
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
filetype = sb->s_feature_incompat &
EXT2_FEATURE_INCOMPAT_FILETYPE;
if ((sparse != old_sparse) ||
(filetype != old_filetype)) {
fs->super->s_state &= ~EXT2_VALID_FS;
printf("\n%s\n", please_fsck);
}
ext2fs_mark_super_dirty(fs);
}
if (U_flag) {
if (strcasecmp(new_UUID, "null") == 0) {
uuid_clear(sb->s_uuid);
} else if (strcasecmp(new_UUID, "random") == 0) {
uuid_generate(sb->s_uuid);
} else if (uuid_parse(new_UUID, sb->s_uuid)) {
com_err(program_name, 0, "Invalid UUID format\n");
exit(1);
}
ext2fs_mark_super_dirty(fs);
}
if (l_flag)
list_super (fs->super);
ext2fs_close (fs);
exit (0);
}
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