/*
|
/*
|
* linux/fs/ext2/super.c
|
* linux/fs/ext2/super.c
|
*
|
*
|
* Copyright (C) 1992, 1993, 1994, 1995
|
* Copyright (C) 1992, 1993, 1994, 1995
|
* Remy Card (card@masi.ibp.fr)
|
* Remy Card (card@masi.ibp.fr)
|
* Laboratoire MASI - Institut Blaise Pascal
|
* Laboratoire MASI - Institut Blaise Pascal
|
* Universite Pierre et Marie Curie (Paris VI)
|
* Universite Pierre et Marie Curie (Paris VI)
|
*
|
*
|
* from
|
* from
|
*
|
*
|
* linux/fs/minix/inode.c
|
* linux/fs/minix/inode.c
|
*
|
*
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
*
|
*
|
* Big-endian to little-endian byte-swapping/bitmaps by
|
* Big-endian to little-endian byte-swapping/bitmaps by
|
* David S. Miller (davem@caip.rutgers.edu), 1995
|
* David S. Miller (davem@caip.rutgers.edu), 1995
|
*/
|
*/
|
|
|
#include <linux/module.h>
|
#include <linux/module.h>
|
|
|
#include <stdarg.h>
|
#include <stdarg.h>
|
|
|
#include <asm/bitops.h>
|
#include <asm/bitops.h>
|
#include <asm/segment.h>
|
#include <asm/segment.h>
|
#include <asm/system.h>
|
#include <asm/system.h>
|
|
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/fs.h>
|
#include <linux/fs.h>
|
#include <linux/ext2_fs.h>
|
#include <linux/ext2_fs.h>
|
#include <linux/malloc.h>
|
#include <linux/malloc.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/stat.h>
|
#include <linux/stat.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/locks.h>
|
#include <linux/locks.h>
|
|
|
static char error_buf[1024];
|
static char error_buf[1024];
|
|
|
void ext2_error (struct super_block * sb, const char * function,
|
void ext2_error (struct super_block * sb, const char * function,
|
const char * fmt, ...)
|
const char * fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
if (!(sb->s_flags & MS_RDONLY)) {
|
sb->u.ext2_sb.s_mount_state |= EXT2_ERROR_FS;
|
sb->u.ext2_sb.s_mount_state |= EXT2_ERROR_FS;
|
sb->u.ext2_sb.s_es->s_state =
|
sb->u.ext2_sb.s_es->s_state =
|
swab16(swab16(sb->u.ext2_sb.s_es->s_state) | EXT2_ERROR_FS);
|
swab16(swab16(sb->u.ext2_sb.s_es->s_state) | EXT2_ERROR_FS);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
sb->s_dirt = 1;
|
sb->s_dirt = 1;
|
}
|
}
|
va_start (args, fmt);
|
va_start (args, fmt);
|
vsprintf (error_buf, fmt, args);
|
vsprintf (error_buf, fmt, args);
|
va_end (args);
|
va_end (args);
|
if (test_opt (sb, ERRORS_PANIC) ||
|
if (test_opt (sb, ERRORS_PANIC) ||
|
(swab16(sb->u.ext2_sb.s_es->s_errors) == EXT2_ERRORS_PANIC &&
|
(swab16(sb->u.ext2_sb.s_es->s_errors) == EXT2_ERRORS_PANIC &&
|
!test_opt (sb, ERRORS_CONT) && !test_opt (sb, ERRORS_RO)))
|
!test_opt (sb, ERRORS_CONT) && !test_opt (sb, ERRORS_RO)))
|
panic ("EXT2-fs panic (device %s): %s: %s\n",
|
panic ("EXT2-fs panic (device %s): %s: %s\n",
|
kdevname(sb->s_dev), function, error_buf);
|
kdevname(sb->s_dev), function, error_buf);
|
printk (KERN_CRIT "EXT2-fs error (device %s): %s: %s\n",
|
printk (KERN_CRIT "EXT2-fs error (device %s): %s: %s\n",
|
kdevname(sb->s_dev), function, error_buf);
|
kdevname(sb->s_dev), function, error_buf);
|
if (test_opt (sb, ERRORS_RO) ||
|
if (test_opt (sb, ERRORS_RO) ||
|
(swab16(sb->u.ext2_sb.s_es->s_errors) == EXT2_ERRORS_RO &&
|
(swab16(sb->u.ext2_sb.s_es->s_errors) == EXT2_ERRORS_RO &&
|
!test_opt (sb, ERRORS_CONT) && !test_opt (sb, ERRORS_PANIC))) {
|
!test_opt (sb, ERRORS_CONT) && !test_opt (sb, ERRORS_PANIC))) {
|
printk ("Remounting filesystem read-only\n");
|
printk ("Remounting filesystem read-only\n");
|
sb->s_flags |= MS_RDONLY;
|
sb->s_flags |= MS_RDONLY;
|
}
|
}
|
}
|
}
|
|
|
NORET_TYPE void ext2_panic (struct super_block * sb, const char * function,
|
NORET_TYPE void ext2_panic (struct super_block * sb, const char * function,
|
const char * fmt, ...)
|
const char * fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
if (!(sb->s_flags & MS_RDONLY)) {
|
sb->u.ext2_sb.s_mount_state |= EXT2_ERROR_FS;
|
sb->u.ext2_sb.s_mount_state |= EXT2_ERROR_FS;
|
sb->u.ext2_sb.s_es->s_state =
|
sb->u.ext2_sb.s_es->s_state =
|
swab16(swab16(sb->u.ext2_sb.s_es->s_state) | EXT2_ERROR_FS);
|
swab16(swab16(sb->u.ext2_sb.s_es->s_state) | EXT2_ERROR_FS);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
sb->s_dirt = 1;
|
sb->s_dirt = 1;
|
}
|
}
|
va_start (args, fmt);
|
va_start (args, fmt);
|
vsprintf (error_buf, fmt, args);
|
vsprintf (error_buf, fmt, args);
|
va_end (args);
|
va_end (args);
|
/* this is to prevent panic from syncing this filesystem */
|
/* this is to prevent panic from syncing this filesystem */
|
if (sb->s_lock)
|
if (sb->s_lock)
|
sb->s_lock=0;
|
sb->s_lock=0;
|
sb->s_flags |= MS_RDONLY;
|
sb->s_flags |= MS_RDONLY;
|
panic ("EXT2-fs panic (device %s): %s: %s\n",
|
panic ("EXT2-fs panic (device %s): %s: %s\n",
|
kdevname(sb->s_dev), function, error_buf);
|
kdevname(sb->s_dev), function, error_buf);
|
}
|
}
|
|
|
void ext2_warning (struct super_block * sb, const char * function,
|
void ext2_warning (struct super_block * sb, const char * function,
|
const char * fmt, ...)
|
const char * fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
|
|
va_start (args, fmt);
|
va_start (args, fmt);
|
vsprintf (error_buf, fmt, args);
|
vsprintf (error_buf, fmt, args);
|
va_end (args);
|
va_end (args);
|
printk (KERN_WARNING "EXT2-fs warning (device %s): %s: %s\n",
|
printk (KERN_WARNING "EXT2-fs warning (device %s): %s: %s\n",
|
kdevname(sb->s_dev), function, error_buf);
|
kdevname(sb->s_dev), function, error_buf);
|
}
|
}
|
|
|
void ext2_put_super (struct super_block * sb)
|
void ext2_put_super (struct super_block * sb)
|
{
|
{
|
int db_count;
|
int db_count;
|
int i;
|
int i;
|
|
|
lock_super (sb);
|
lock_super (sb);
|
if (!(sb->s_flags & MS_RDONLY)) {
|
if (!(sb->s_flags & MS_RDONLY)) {
|
sb->u.ext2_sb.s_es->s_state = swab16(sb->u.ext2_sb.s_mount_state);
|
sb->u.ext2_sb.s_es->s_state = swab16(sb->u.ext2_sb.s_mount_state);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
}
|
}
|
sb->s_dev = 0;
|
sb->s_dev = 0;
|
db_count = sb->u.ext2_sb.s_db_per_group;
|
db_count = sb->u.ext2_sb.s_db_per_group;
|
for (i = 0; i < db_count; i++)
|
for (i = 0; i < db_count; i++)
|
if (sb->u.ext2_sb.s_group_desc[i])
|
if (sb->u.ext2_sb.s_group_desc[i])
|
brelse (sb->u.ext2_sb.s_group_desc[i]);
|
brelse (sb->u.ext2_sb.s_group_desc[i]);
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
db_count * sizeof (struct buffer_head *));
|
db_count * sizeof (struct buffer_head *));
|
for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
|
for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
|
if (sb->u.ext2_sb.s_inode_bitmap[i])
|
if (sb->u.ext2_sb.s_inode_bitmap[i])
|
brelse (sb->u.ext2_sb.s_inode_bitmap[i]);
|
brelse (sb->u.ext2_sb.s_inode_bitmap[i]);
|
for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
|
for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++)
|
if (sb->u.ext2_sb.s_block_bitmap[i])
|
if (sb->u.ext2_sb.s_block_bitmap[i])
|
brelse (sb->u.ext2_sb.s_block_bitmap[i]);
|
brelse (sb->u.ext2_sb.s_block_bitmap[i]);
|
brelse (sb->u.ext2_sb.s_sbh);
|
brelse (sb->u.ext2_sb.s_sbh);
|
unlock_super (sb);
|
unlock_super (sb);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return;
|
return;
|
}
|
}
|
|
|
static struct super_operations ext2_sops = {
|
static struct super_operations ext2_sops = {
|
ext2_read_inode,
|
ext2_read_inode,
|
NULL,
|
NULL,
|
ext2_write_inode,
|
ext2_write_inode,
|
ext2_put_inode,
|
ext2_put_inode,
|
ext2_put_super,
|
ext2_put_super,
|
ext2_write_super,
|
ext2_write_super,
|
ext2_statfs,
|
ext2_statfs,
|
ext2_remount
|
ext2_remount
|
};
|
};
|
|
|
/*
|
/*
|
* This function has been shamelessly adapted from the msdos fs
|
* This function has been shamelessly adapted from the msdos fs
|
*/
|
*/
|
static int parse_options (char * options, unsigned long * sb_block,
|
static int parse_options (char * options, unsigned long * sb_block,
|
unsigned short *resuid, unsigned short * resgid,
|
unsigned short *resuid, unsigned short * resgid,
|
unsigned long * mount_options)
|
unsigned long * mount_options)
|
{
|
{
|
char * this_char;
|
char * this_char;
|
char * value;
|
char * value;
|
|
|
if (!options)
|
if (!options)
|
return 1;
|
return 1;
|
for (this_char = strtok (options, ",");
|
for (this_char = strtok (options, ",");
|
this_char != NULL;
|
this_char != NULL;
|
this_char = strtok (NULL, ",")) {
|
this_char = strtok (NULL, ",")) {
|
if ((value = strchr (this_char, '=')) != NULL)
|
if ((value = strchr (this_char, '=')) != NULL)
|
*value++ = 0;
|
*value++ = 0;
|
if (!strcmp (this_char, "bsddf"))
|
if (!strcmp (this_char, "bsddf"))
|
clear_opt (*mount_options, MINIX_DF);
|
clear_opt (*mount_options, MINIX_DF);
|
else if (!strcmp (this_char, "check")) {
|
else if (!strcmp (this_char, "check")) {
|
if (!value || !*value)
|
if (!value || !*value)
|
set_opt (*mount_options, CHECK_NORMAL);
|
set_opt (*mount_options, CHECK_NORMAL);
|
else if (!strcmp (value, "none")) {
|
else if (!strcmp (value, "none")) {
|
clear_opt (*mount_options, CHECK_NORMAL);
|
clear_opt (*mount_options, CHECK_NORMAL);
|
clear_opt (*mount_options, CHECK_STRICT);
|
clear_opt (*mount_options, CHECK_STRICT);
|
}
|
}
|
else if (!strcmp (value, "normal"))
|
else if (!strcmp (value, "normal"))
|
set_opt (*mount_options, CHECK_NORMAL);
|
set_opt (*mount_options, CHECK_NORMAL);
|
else if (!strcmp (value, "strict")) {
|
else if (!strcmp (value, "strict")) {
|
set_opt (*mount_options, CHECK_NORMAL);
|
set_opt (*mount_options, CHECK_NORMAL);
|
set_opt (*mount_options, CHECK_STRICT);
|
set_opt (*mount_options, CHECK_STRICT);
|
}
|
}
|
else {
|
else {
|
printk ("EXT2-fs: Invalid check option: %s\n",
|
printk ("EXT2-fs: Invalid check option: %s\n",
|
value);
|
value);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
else if (!strcmp (this_char, "debug"))
|
else if (!strcmp (this_char, "debug"))
|
set_opt (*mount_options, DEBUG);
|
set_opt (*mount_options, DEBUG);
|
else if (!strcmp (this_char, "errors")) {
|
else if (!strcmp (this_char, "errors")) {
|
if (!value || !*value) {
|
if (!value || !*value) {
|
printk ("EXT2-fs: the errors option requires "
|
printk ("EXT2-fs: the errors option requires "
|
"an argument");
|
"an argument");
|
return 0;
|
return 0;
|
}
|
}
|
if (!strcmp (value, "continue")) {
|
if (!strcmp (value, "continue")) {
|
clear_opt (*mount_options, ERRORS_RO);
|
clear_opt (*mount_options, ERRORS_RO);
|
clear_opt (*mount_options, ERRORS_PANIC);
|
clear_opt (*mount_options, ERRORS_PANIC);
|
set_opt (*mount_options, ERRORS_CONT);
|
set_opt (*mount_options, ERRORS_CONT);
|
}
|
}
|
else if (!strcmp (value, "remount-ro")) {
|
else if (!strcmp (value, "remount-ro")) {
|
clear_opt (*mount_options, ERRORS_CONT);
|
clear_opt (*mount_options, ERRORS_CONT);
|
clear_opt (*mount_options, ERRORS_PANIC);
|
clear_opt (*mount_options, ERRORS_PANIC);
|
set_opt (*mount_options, ERRORS_RO);
|
set_opt (*mount_options, ERRORS_RO);
|
}
|
}
|
else if (!strcmp (value, "panic")) {
|
else if (!strcmp (value, "panic")) {
|
clear_opt (*mount_options, ERRORS_CONT);
|
clear_opt (*mount_options, ERRORS_CONT);
|
clear_opt (*mount_options, ERRORS_RO);
|
clear_opt (*mount_options, ERRORS_RO);
|
set_opt (*mount_options, ERRORS_PANIC);
|
set_opt (*mount_options, ERRORS_PANIC);
|
}
|
}
|
else {
|
else {
|
printk ("EXT2-fs: Invalid errors option: %s\n",
|
printk ("EXT2-fs: Invalid errors option: %s\n",
|
value);
|
value);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
else if (!strcmp (this_char, "grpid") ||
|
else if (!strcmp (this_char, "grpid") ||
|
!strcmp (this_char, "bsdgroups"))
|
!strcmp (this_char, "bsdgroups"))
|
set_opt (*mount_options, GRPID);
|
set_opt (*mount_options, GRPID);
|
else if (!strcmp (this_char, "minixdf"))
|
else if (!strcmp (this_char, "minixdf"))
|
set_opt (*mount_options, MINIX_DF);
|
set_opt (*mount_options, MINIX_DF);
|
else if (!strcmp (this_char, "nocheck")) {
|
else if (!strcmp (this_char, "nocheck")) {
|
clear_opt (*mount_options, CHECK_NORMAL);
|
clear_opt (*mount_options, CHECK_NORMAL);
|
clear_opt (*mount_options, CHECK_STRICT);
|
clear_opt (*mount_options, CHECK_STRICT);
|
}
|
}
|
else if (!strcmp (this_char, "nogrpid") ||
|
else if (!strcmp (this_char, "nogrpid") ||
|
!strcmp (this_char, "sysvgroups"))
|
!strcmp (this_char, "sysvgroups"))
|
clear_opt (*mount_options, GRPID);
|
clear_opt (*mount_options, GRPID);
|
else if (!strcmp (this_char, "resgid")) {
|
else if (!strcmp (this_char, "resgid")) {
|
if (!value || !*value) {
|
if (!value || !*value) {
|
printk ("EXT2-fs: the resgid option requires "
|
printk ("EXT2-fs: the resgid option requires "
|
"an argument");
|
"an argument");
|
return 0;
|
return 0;
|
}
|
}
|
*resgid = simple_strtoul (value, &value, 0);
|
*resgid = simple_strtoul (value, &value, 0);
|
if (*value) {
|
if (*value) {
|
printk ("EXT2-fs: Invalid resgid option: %s\n",
|
printk ("EXT2-fs: Invalid resgid option: %s\n",
|
value);
|
value);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
else if (!strcmp (this_char, "resuid")) {
|
else if (!strcmp (this_char, "resuid")) {
|
if (!value || !*value) {
|
if (!value || !*value) {
|
printk ("EXT2-fs: the resuid option requires "
|
printk ("EXT2-fs: the resuid option requires "
|
"an argument");
|
"an argument");
|
return 0;
|
return 0;
|
}
|
}
|
*resuid = simple_strtoul (value, &value, 0);
|
*resuid = simple_strtoul (value, &value, 0);
|
if (*value) {
|
if (*value) {
|
printk ("EXT2-fs: Invalid resuid option: %s\n",
|
printk ("EXT2-fs: Invalid resuid option: %s\n",
|
value);
|
value);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
else if (!strcmp (this_char, "sb")) {
|
else if (!strcmp (this_char, "sb")) {
|
if (!value || !*value) {
|
if (!value || !*value) {
|
printk ("EXT2-fs: the sb option requires "
|
printk ("EXT2-fs: the sb option requires "
|
"an argument");
|
"an argument");
|
return 0;
|
return 0;
|
}
|
}
|
*sb_block = simple_strtoul (value, &value, 0);
|
*sb_block = simple_strtoul (value, &value, 0);
|
if (*value) {
|
if (*value) {
|
printk ("EXT2-fs: Invalid sb option: %s\n",
|
printk ("EXT2-fs: Invalid sb option: %s\n",
|
value);
|
value);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
/* Silently ignore the quota options */
|
/* Silently ignore the quota options */
|
else if (!strcmp (this_char, "grpquota")
|
else if (!strcmp (this_char, "grpquota")
|
|| !strcmp (this_char, "noquota")
|
|| !strcmp (this_char, "noquota")
|
|| !strcmp (this_char, "quota")
|
|| !strcmp (this_char, "quota")
|
|| !strcmp (this_char, "usrquota"))
|
|| !strcmp (this_char, "usrquota"))
|
/* Don't do anything ;-) */ ;
|
/* Don't do anything ;-) */ ;
|
else {
|
else {
|
printk ("EXT2-fs: Unrecognized mount option %s\n", this_char);
|
printk ("EXT2-fs: Unrecognized mount option %s\n", this_char);
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static void ext2_setup_super (struct super_block * sb,
|
static void ext2_setup_super (struct super_block * sb,
|
struct ext2_super_block * es)
|
struct ext2_super_block * es)
|
{
|
{
|
if (swab32(es->s_rev_level) > EXT2_MAX_SUPP_REV) {
|
if (swab32(es->s_rev_level) > EXT2_MAX_SUPP_REV) {
|
printk ("EXT2-fs warning: revision level too high, "
|
printk ("EXT2-fs warning: revision level too high, "
|
"forcing read/only mode\n");
|
"forcing read/only mode\n");
|
sb->s_flags |= MS_RDONLY;
|
sb->s_flags |= MS_RDONLY;
|
}
|
}
|
if (!(sb->s_flags & MS_RDONLY)) {
|
if (!(sb->s_flags & MS_RDONLY)) {
|
if (!(sb->u.ext2_sb.s_mount_state & EXT2_VALID_FS))
|
if (!(sb->u.ext2_sb.s_mount_state & EXT2_VALID_FS))
|
printk ("EXT2-fs warning: mounting unchecked fs, "
|
printk ("EXT2-fs warning: mounting unchecked fs, "
|
"running e2fsck is recommended\n");
|
"running e2fsck is recommended\n");
|
else if ((sb->u.ext2_sb.s_mount_state & EXT2_ERROR_FS))
|
else if ((sb->u.ext2_sb.s_mount_state & EXT2_ERROR_FS))
|
printk ("EXT2-fs warning: mounting fs with errors, "
|
printk ("EXT2-fs warning: mounting fs with errors, "
|
"running e2fsck is recommended\n");
|
"running e2fsck is recommended\n");
|
else if ((__s16) swab16(es->s_max_mnt_count) >= 0 &&
|
else if ((__s16) swab16(es->s_max_mnt_count) >= 0 &&
|
swab16(es->s_mnt_count) >=
|
swab16(es->s_mnt_count) >=
|
(unsigned short) (__s16) swab16(es->s_max_mnt_count))
|
(unsigned short) (__s16) swab16(es->s_max_mnt_count))
|
printk ("EXT2-fs warning: maximal mount count reached, "
|
printk ("EXT2-fs warning: maximal mount count reached, "
|
"running e2fsck is recommended\n");
|
"running e2fsck is recommended\n");
|
else if (swab32(es->s_checkinterval) &&
|
else if (swab32(es->s_checkinterval) &&
|
(swab32(es->s_lastcheck) + swab32(es->s_checkinterval) <= CURRENT_TIME))
|
(swab32(es->s_lastcheck) + swab32(es->s_checkinterval) <= CURRENT_TIME))
|
printk ("EXT2-fs warning: checktime reached, "
|
printk ("EXT2-fs warning: checktime reached, "
|
"running e2fsck is recommended\n");
|
"running e2fsck is recommended\n");
|
es->s_state = swab16(swab16(es->s_state) & ~EXT2_VALID_FS);
|
es->s_state = swab16(swab16(es->s_state) & ~EXT2_VALID_FS);
|
if (!(__s16) swab16(es->s_max_mnt_count))
|
if (!(__s16) swab16(es->s_max_mnt_count))
|
es->s_max_mnt_count = (__s16) swab16(EXT2_DFL_MAX_MNT_COUNT);
|
es->s_max_mnt_count = (__s16) swab16(EXT2_DFL_MAX_MNT_COUNT);
|
es->s_mnt_count=swab16(swab16(es->s_mnt_count) + 1);
|
es->s_mnt_count=swab16(swab16(es->s_mnt_count) + 1);
|
es->s_mtime = swab32(CURRENT_TIME);
|
es->s_mtime = swab32(CURRENT_TIME);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
sb->s_dirt = 1;
|
sb->s_dirt = 1;
|
if (test_opt (sb, DEBUG))
|
if (test_opt (sb, DEBUG))
|
printk ("[EXT II FS %s, %s, bs=%lu, fs=%lu, gc=%lu, "
|
printk ("[EXT II FS %s, %s, bs=%lu, fs=%lu, gc=%lu, "
|
"bpg=%lu, ipg=%lu, mo=%04lx]\n",
|
"bpg=%lu, ipg=%lu, mo=%04lx]\n",
|
EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize,
|
EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize,
|
sb->u.ext2_sb.s_frag_size,
|
sb->u.ext2_sb.s_frag_size,
|
sb->u.ext2_sb.s_groups_count,
|
sb->u.ext2_sb.s_groups_count,
|
EXT2_BLOCKS_PER_GROUP(sb),
|
EXT2_BLOCKS_PER_GROUP(sb),
|
EXT2_INODES_PER_GROUP(sb),
|
EXT2_INODES_PER_GROUP(sb),
|
sb->u.ext2_sb.s_mount_opt);
|
sb->u.ext2_sb.s_mount_opt);
|
if (test_opt (sb, CHECK)) {
|
if (test_opt (sb, CHECK)) {
|
ext2_check_blocks_bitmap (sb);
|
ext2_check_blocks_bitmap (sb);
|
ext2_check_inodes_bitmap (sb);
|
ext2_check_inodes_bitmap (sb);
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
static int ext2_check_descriptors (struct super_block * sb)
|
static int ext2_check_descriptors (struct super_block * sb)
|
{
|
{
|
int i;
|
int i;
|
int desc_block = 0;
|
int desc_block = 0;
|
unsigned long block = swab32(sb->u.ext2_sb.s_es->s_first_data_block);
|
unsigned long block = swab32(sb->u.ext2_sb.s_es->s_first_data_block);
|
struct ext2_group_desc * gdp = NULL;
|
struct ext2_group_desc * gdp = NULL;
|
|
|
ext2_debug ("Checking group descriptors");
|
ext2_debug ("Checking group descriptors");
|
|
|
for (i = 0; i < sb->u.ext2_sb.s_groups_count; i++)
|
for (i = 0; i < sb->u.ext2_sb.s_groups_count; i++)
|
{
|
{
|
if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
|
if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0)
|
gdp = (struct ext2_group_desc *) sb->u.ext2_sb.s_group_desc[desc_block++]->b_data;
|
gdp = (struct ext2_group_desc *) sb->u.ext2_sb.s_group_desc[desc_block++]->b_data;
|
if (swab32(gdp->bg_block_bitmap) < block ||
|
if (swab32(gdp->bg_block_bitmap) < block ||
|
swab32(gdp->bg_block_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
|
swab32(gdp->bg_block_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
|
{
|
{
|
ext2_error (sb, "ext2_check_descriptors",
|
ext2_error (sb, "ext2_check_descriptors",
|
"Block bitmap for group %d"
|
"Block bitmap for group %d"
|
" not in group (block %lu)!",
|
" not in group (block %lu)!",
|
i, (unsigned long) swab32(gdp->bg_block_bitmap));
|
i, (unsigned long) swab32(gdp->bg_block_bitmap));
|
return 0;
|
return 0;
|
}
|
}
|
if (swab32(gdp->bg_inode_bitmap) < block ||
|
if (swab32(gdp->bg_inode_bitmap) < block ||
|
swab32(gdp->bg_inode_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
|
swab32(gdp->bg_inode_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb))
|
{
|
{
|
ext2_error (sb, "ext2_check_descriptors",
|
ext2_error (sb, "ext2_check_descriptors",
|
"Inode bitmap for group %d"
|
"Inode bitmap for group %d"
|
" not in group (block %lu)!",
|
" not in group (block %lu)!",
|
i, (unsigned long) swab32(gdp->bg_inode_bitmap));
|
i, (unsigned long) swab32(gdp->bg_inode_bitmap));
|
return 0;
|
return 0;
|
}
|
}
|
if (swab32(gdp->bg_inode_table) < block ||
|
if (swab32(gdp->bg_inode_table) < block ||
|
swab32(gdp->bg_inode_table) + sb->u.ext2_sb.s_itb_per_group >=
|
swab32(gdp->bg_inode_table) + sb->u.ext2_sb.s_itb_per_group >=
|
block + EXT2_BLOCKS_PER_GROUP(sb))
|
block + EXT2_BLOCKS_PER_GROUP(sb))
|
{
|
{
|
ext2_error (sb, "ext2_check_descriptors",
|
ext2_error (sb, "ext2_check_descriptors",
|
"Inode table for group %d"
|
"Inode table for group %d"
|
" not in group (block %lu)!",
|
" not in group (block %lu)!",
|
i, (unsigned long) swab32(gdp->bg_inode_table));
|
i, (unsigned long) swab32(gdp->bg_inode_table));
|
return 0;
|
return 0;
|
}
|
}
|
block += EXT2_BLOCKS_PER_GROUP(sb);
|
block += EXT2_BLOCKS_PER_GROUP(sb);
|
gdp++;
|
gdp++;
|
}
|
}
|
return 1;
|
return 1;
|
}
|
}
|
|
|
#define log2(n) ffz(~(n))
|
#define log2(n) ffz(~(n))
|
|
|
struct super_block * ext2_read_super (struct super_block * sb, void * data,
|
struct super_block * ext2_read_super (struct super_block * sb, void * data,
|
int silent)
|
int silent)
|
{
|
{
|
struct buffer_head * bh;
|
struct buffer_head * bh;
|
struct ext2_super_block * es;
|
struct ext2_super_block * es;
|
unsigned long sb_block = 1;
|
unsigned long sb_block = 1;
|
unsigned short resuid = EXT2_DEF_RESUID;
|
unsigned short resuid = EXT2_DEF_RESUID;
|
unsigned short resgid = EXT2_DEF_RESGID;
|
unsigned short resgid = EXT2_DEF_RESGID;
|
unsigned long logic_sb_block = 1;
|
unsigned long logic_sb_block = 1;
|
kdev_t dev = sb->s_dev;
|
kdev_t dev = sb->s_dev;
|
int db_count;
|
int db_count;
|
int i, j;
|
int i, j;
|
|
|
sb->u.ext2_sb.s_mount_opt = 0;
|
sb->u.ext2_sb.s_mount_opt = 0;
|
set_opt (sb->u.ext2_sb.s_mount_opt, CHECK_NORMAL);
|
set_opt (sb->u.ext2_sb.s_mount_opt, CHECK_NORMAL);
|
if (!parse_options ((char *) data, &sb_block, &resuid, &resgid,
|
if (!parse_options ((char *) data, &sb_block, &resuid, &resgid,
|
&sb->u.ext2_sb.s_mount_opt)) {
|
&sb->u.ext2_sb.s_mount_opt)) {
|
sb->s_dev = 0;
|
sb->s_dev = 0;
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
lock_super (sb);
|
lock_super (sb);
|
set_blocksize (dev, BLOCK_SIZE);
|
set_blocksize (dev, BLOCK_SIZE);
|
if (!(bh = bread (dev, sb_block, BLOCK_SIZE))) {
|
if (!(bh = bread (dev, sb_block, BLOCK_SIZE))) {
|
sb->s_dev = 0;
|
sb->s_dev = 0;
|
unlock_super (sb);
|
unlock_super (sb);
|
printk ("EXT2-fs: unable to read superblock\n");
|
printk ("EXT2-fs: unable to read superblock\n");
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return NULL;
|
return NULL;
|
}
|
}
|
/*
|
/*
|
* Note: s_es must be initialized s_es as soon as possible because
|
* Note: s_es must be initialized s_es as soon as possible because
|
* some ext2 macro-instructions depend on its value
|
* some ext2 macro-instructions depend on its value
|
*/
|
*/
|
es = (struct ext2_super_block *) bh->b_data;
|
es = (struct ext2_super_block *) bh->b_data;
|
sb->u.ext2_sb.s_es = es;
|
sb->u.ext2_sb.s_es = es;
|
sb->s_magic = swab16(es->s_magic);
|
sb->s_magic = swab16(es->s_magic);
|
if (sb->s_magic != EXT2_SUPER_MAGIC) {
|
if (sb->s_magic != EXT2_SUPER_MAGIC) {
|
if (!silent)
|
if (!silent)
|
printk ("VFS: Can't find an ext2 filesystem on dev "
|
printk ("VFS: Can't find an ext2 filesystem on dev "
|
"%s.\n", kdevname(dev));
|
"%s.\n", kdevname(dev));
|
failed_mount:
|
failed_mount:
|
sb->s_dev = 0;
|
sb->s_dev = 0;
|
unlock_super (sb);
|
unlock_super (sb);
|
if (bh)
|
if (bh)
|
brelse(bh);
|
brelse(bh);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return NULL;
|
return NULL;
|
}
|
}
|
if (swab32(es->s_rev_level) > EXT2_GOOD_OLD_REV) {
|
if (swab32(es->s_rev_level) > EXT2_GOOD_OLD_REV) {
|
if (swab32(es->s_feature_incompat) & ~EXT2_FEATURE_INCOMPAT_SUPP) {
|
if (swab32(es->s_feature_incompat) & ~EXT2_FEATURE_INCOMPAT_SUPP) {
|
printk("EXT2-fs: %s: couldn't mount because of "
|
printk("EXT2-fs: %s: couldn't mount because of "
|
"unsupported optional features.\n",
|
"unsupported optional features.\n",
|
kdevname(dev));
|
kdevname(dev));
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
if (!(sb->s_flags & MS_RDONLY) &&
|
if (!(sb->s_flags & MS_RDONLY) &&
|
(swab32(es->s_feature_ro_compat) & ~EXT2_FEATURE_RO_COMPAT_SUPP)) {
|
(swab32(es->s_feature_ro_compat) & ~EXT2_FEATURE_RO_COMPAT_SUPP)) {
|
printk("EXT2-fs: %s: couldn't mount RDWR because of "
|
printk("EXT2-fs: %s: couldn't mount RDWR because of "
|
"unsupported optional features.\n",
|
"unsupported optional features.\n",
|
kdevname(dev));
|
kdevname(dev));
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
}
|
}
|
sb->s_blocksize_bits = swab32(sb->u.ext2_sb.s_es->s_log_block_size) + 10;
|
sb->s_blocksize_bits = swab32(sb->u.ext2_sb.s_es->s_log_block_size) + 10;
|
sb->s_blocksize = 1 << sb->s_blocksize_bits;
|
sb->s_blocksize = 1 << sb->s_blocksize_bits;
|
if (sb->s_blocksize != BLOCK_SIZE &&
|
if (sb->s_blocksize != BLOCK_SIZE &&
|
(sb->s_blocksize == 1024 || sb->s_blocksize == 2048 ||
|
(sb->s_blocksize == 1024 || sb->s_blocksize == 2048 ||
|
sb->s_blocksize == 4096)) {
|
sb->s_blocksize == 4096)) {
|
unsigned long offset;
|
unsigned long offset;
|
|
|
brelse (bh);
|
brelse (bh);
|
set_blocksize (dev, sb->s_blocksize);
|
set_blocksize (dev, sb->s_blocksize);
|
logic_sb_block = (sb_block*BLOCK_SIZE) / sb->s_blocksize;
|
logic_sb_block = (sb_block*BLOCK_SIZE) / sb->s_blocksize;
|
offset = (sb_block*BLOCK_SIZE) % sb->s_blocksize;
|
offset = (sb_block*BLOCK_SIZE) % sb->s_blocksize;
|
bh = bread (dev, logic_sb_block, sb->s_blocksize);
|
bh = bread (dev, logic_sb_block, sb->s_blocksize);
|
if(!bh) {
|
if(!bh) {
|
printk("EXT2-fs: Couldn't read superblock on "
|
printk("EXT2-fs: Couldn't read superblock on "
|
"2nd try.\n");
|
"2nd try.\n");
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
|
es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
|
sb->u.ext2_sb.s_es = es;
|
sb->u.ext2_sb.s_es = es;
|
if (es->s_magic != swab16(EXT2_SUPER_MAGIC)) {
|
if (es->s_magic != swab16(EXT2_SUPER_MAGIC)) {
|
printk ("EXT2-fs: Magic mismatch, very weird !\n");
|
printk ("EXT2-fs: Magic mismatch, very weird !\n");
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
}
|
}
|
if (swab32(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
|
if (swab32(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
|
sb->u.ext2_sb.s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
|
sb->u.ext2_sb.s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
|
sb->u.ext2_sb.s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
|
sb->u.ext2_sb.s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
|
} else {
|
} else {
|
sb->u.ext2_sb.s_inode_size = swab16(es->s_inode_size);
|
sb->u.ext2_sb.s_inode_size = swab16(es->s_inode_size);
|
sb->u.ext2_sb.s_first_ino = swab32(es->s_first_ino);
|
sb->u.ext2_sb.s_first_ino = swab32(es->s_first_ino);
|
if (sb->u.ext2_sb.s_inode_size != EXT2_GOOD_OLD_INODE_SIZE) {
|
if (sb->u.ext2_sb.s_inode_size != EXT2_GOOD_OLD_INODE_SIZE) {
|
printk ("EXT2-fs: unsupported inode size: %d\n",
|
printk ("EXT2-fs: unsupported inode size: %d\n",
|
sb->u.ext2_sb.s_inode_size);
|
sb->u.ext2_sb.s_inode_size);
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
}
|
}
|
sb->u.ext2_sb.s_frag_size = EXT2_MIN_FRAG_SIZE <<
|
sb->u.ext2_sb.s_frag_size = EXT2_MIN_FRAG_SIZE <<
|
(__s32) swab32(es->s_log_frag_size);
|
(__s32) swab32(es->s_log_frag_size);
|
if (sb->u.ext2_sb.s_frag_size)
|
if (sb->u.ext2_sb.s_frag_size)
|
sb->u.ext2_sb.s_frags_per_block = sb->s_blocksize /
|
sb->u.ext2_sb.s_frags_per_block = sb->s_blocksize /
|
sb->u.ext2_sb.s_frag_size;
|
sb->u.ext2_sb.s_frag_size;
|
else
|
else
|
sb->s_magic = 0;
|
sb->s_magic = 0;
|
sb->u.ext2_sb.s_blocks_per_group = swab32(es->s_blocks_per_group);
|
sb->u.ext2_sb.s_blocks_per_group = swab32(es->s_blocks_per_group);
|
sb->u.ext2_sb.s_frags_per_group = swab32(es->s_frags_per_group);
|
sb->u.ext2_sb.s_frags_per_group = swab32(es->s_frags_per_group);
|
sb->u.ext2_sb.s_inodes_per_group = swab32(es->s_inodes_per_group);
|
sb->u.ext2_sb.s_inodes_per_group = swab32(es->s_inodes_per_group);
|
sb->u.ext2_sb.s_inodes_per_block = sb->s_blocksize /
|
sb->u.ext2_sb.s_inodes_per_block = sb->s_blocksize /
|
EXT2_INODE_SIZE(sb);
|
EXT2_INODE_SIZE(sb);
|
sb->u.ext2_sb.s_itb_per_group = sb->u.ext2_sb.s_inodes_per_group /
|
sb->u.ext2_sb.s_itb_per_group = sb->u.ext2_sb.s_inodes_per_group /
|
sb->u.ext2_sb.s_inodes_per_block;
|
sb->u.ext2_sb.s_inodes_per_block;
|
sb->u.ext2_sb.s_desc_per_block = sb->s_blocksize /
|
sb->u.ext2_sb.s_desc_per_block = sb->s_blocksize /
|
sizeof (struct ext2_group_desc);
|
sizeof (struct ext2_group_desc);
|
sb->u.ext2_sb.s_sbh = bh;
|
sb->u.ext2_sb.s_sbh = bh;
|
if (resuid != EXT2_DEF_RESUID)
|
if (resuid != EXT2_DEF_RESUID)
|
sb->u.ext2_sb.s_resuid = resuid;
|
sb->u.ext2_sb.s_resuid = resuid;
|
else
|
else
|
sb->u.ext2_sb.s_resuid = swab16(es->s_def_resuid);
|
sb->u.ext2_sb.s_resuid = swab16(es->s_def_resuid);
|
if (resgid != EXT2_DEF_RESGID)
|
if (resgid != EXT2_DEF_RESGID)
|
sb->u.ext2_sb.s_resgid = resgid;
|
sb->u.ext2_sb.s_resgid = resgid;
|
else
|
else
|
sb->u.ext2_sb.s_resgid = swab16(es->s_def_resgid);
|
sb->u.ext2_sb.s_resgid = swab16(es->s_def_resgid);
|
sb->u.ext2_sb.s_mount_state = swab16(es->s_state);
|
sb->u.ext2_sb.s_mount_state = swab16(es->s_state);
|
sb->u.ext2_sb.s_rename_lock = 0;
|
sb->u.ext2_sb.s_rename_lock = 0;
|
sb->u.ext2_sb.s_rename_wait = NULL;
|
sb->u.ext2_sb.s_rename_wait = NULL;
|
sb->u.ext2_sb.s_addr_per_block_bits =
|
sb->u.ext2_sb.s_addr_per_block_bits =
|
log2 (EXT2_ADDR_PER_BLOCK(sb));
|
log2 (EXT2_ADDR_PER_BLOCK(sb));
|
sb->u.ext2_sb.s_desc_per_block_bits =
|
sb->u.ext2_sb.s_desc_per_block_bits =
|
log2 (EXT2_DESC_PER_BLOCK(sb));
|
log2 (EXT2_DESC_PER_BLOCK(sb));
|
if (sb->s_magic != EXT2_SUPER_MAGIC) {
|
if (sb->s_magic != EXT2_SUPER_MAGIC) {
|
if (!silent)
|
if (!silent)
|
printk ("VFS: Can't find an ext2 filesystem on dev "
|
printk ("VFS: Can't find an ext2 filesystem on dev "
|
"%s.\n",
|
"%s.\n",
|
kdevname(dev));
|
kdevname(dev));
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
if (sb->s_blocksize != bh->b_size) {
|
if (sb->s_blocksize != bh->b_size) {
|
if (!silent)
|
if (!silent)
|
printk ("VFS: Unsupported blocksize on dev "
|
printk ("VFS: Unsupported blocksize on dev "
|
"%s.\n", kdevname(dev));
|
"%s.\n", kdevname(dev));
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
|
|
if (sb->s_blocksize != sb->u.ext2_sb.s_frag_size) {
|
if (sb->s_blocksize != sb->u.ext2_sb.s_frag_size) {
|
printk ("EXT2-fs: fragsize %lu != blocksize %lu (not supported yet)\n",
|
printk ("EXT2-fs: fragsize %lu != blocksize %lu (not supported yet)\n",
|
sb->u.ext2_sb.s_frag_size, sb->s_blocksize);
|
sb->u.ext2_sb.s_frag_size, sb->s_blocksize);
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
|
|
if (sb->u.ext2_sb.s_blocks_per_group > sb->s_blocksize * 8) {
|
if (sb->u.ext2_sb.s_blocks_per_group > sb->s_blocksize * 8) {
|
printk ("EXT2-fs: #blocks per group too big: %lu\n",
|
printk ("EXT2-fs: #blocks per group too big: %lu\n",
|
sb->u.ext2_sb.s_blocks_per_group);
|
sb->u.ext2_sb.s_blocks_per_group);
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
if (sb->u.ext2_sb.s_frags_per_group > sb->s_blocksize * 8) {
|
if (sb->u.ext2_sb.s_frags_per_group > sb->s_blocksize * 8) {
|
printk ("EXT2-fs: #fragments per group too big: %lu\n",
|
printk ("EXT2-fs: #fragments per group too big: %lu\n",
|
sb->u.ext2_sb.s_frags_per_group);
|
sb->u.ext2_sb.s_frags_per_group);
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
if (sb->u.ext2_sb.s_inodes_per_group > sb->s_blocksize * 8) {
|
if (sb->u.ext2_sb.s_inodes_per_group > sb->s_blocksize * 8) {
|
printk ("EXT2-fs: #inodes per group too big: %lu\n",
|
printk ("EXT2-fs: #inodes per group too big: %lu\n",
|
sb->u.ext2_sb.s_inodes_per_group);
|
sb->u.ext2_sb.s_inodes_per_group);
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
|
|
sb->u.ext2_sb.s_groups_count = (swab32(es->s_blocks_count) -
|
sb->u.ext2_sb.s_groups_count = (swab32(es->s_blocks_count) -
|
swab32(es->s_first_data_block) +
|
swab32(es->s_first_data_block) +
|
EXT2_BLOCKS_PER_GROUP(sb) - 1) /
|
EXT2_BLOCKS_PER_GROUP(sb) - 1) /
|
EXT2_BLOCKS_PER_GROUP(sb);
|
EXT2_BLOCKS_PER_GROUP(sb);
|
db_count = (sb->u.ext2_sb.s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
|
db_count = (sb->u.ext2_sb.s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
|
EXT2_DESC_PER_BLOCK(sb);
|
EXT2_DESC_PER_BLOCK(sb);
|
sb->u.ext2_sb.s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);
|
sb->u.ext2_sb.s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);
|
if (sb->u.ext2_sb.s_group_desc == NULL) {
|
if (sb->u.ext2_sb.s_group_desc == NULL) {
|
printk ("EXT2-fs: not enough memory\n");
|
printk ("EXT2-fs: not enough memory\n");
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
for (i = 0; i < db_count; i++) {
|
for (i = 0; i < db_count; i++) {
|
sb->u.ext2_sb.s_group_desc[i] = bread (dev, logic_sb_block + i + 1,
|
sb->u.ext2_sb.s_group_desc[i] = bread (dev, logic_sb_block + i + 1,
|
sb->s_blocksize);
|
sb->s_blocksize);
|
if (!sb->u.ext2_sb.s_group_desc[i]) {
|
if (!sb->u.ext2_sb.s_group_desc[i]) {
|
for (j = 0; j < i; j++)
|
for (j = 0; j < i; j++)
|
brelse (sb->u.ext2_sb.s_group_desc[j]);
|
brelse (sb->u.ext2_sb.s_group_desc[j]);
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
db_count * sizeof (struct buffer_head *));
|
db_count * sizeof (struct buffer_head *));
|
printk ("EXT2-fs: unable to read group descriptors\n");
|
printk ("EXT2-fs: unable to read group descriptors\n");
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
}
|
}
|
if (!ext2_check_descriptors (sb)) {
|
if (!ext2_check_descriptors (sb)) {
|
for (j = 0; j < db_count; j++)
|
for (j = 0; j < db_count; j++)
|
brelse (sb->u.ext2_sb.s_group_desc[j]);
|
brelse (sb->u.ext2_sb.s_group_desc[j]);
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
db_count * sizeof (struct buffer_head *));
|
db_count * sizeof (struct buffer_head *));
|
printk ("EXT2-fs: group descriptors corrupted !\n");
|
printk ("EXT2-fs: group descriptors corrupted !\n");
|
goto failed_mount;
|
goto failed_mount;
|
}
|
}
|
for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
|
for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) {
|
sb->u.ext2_sb.s_inode_bitmap_number[i] = 0;
|
sb->u.ext2_sb.s_inode_bitmap_number[i] = 0;
|
sb->u.ext2_sb.s_inode_bitmap[i] = NULL;
|
sb->u.ext2_sb.s_inode_bitmap[i] = NULL;
|
sb->u.ext2_sb.s_block_bitmap_number[i] = 0;
|
sb->u.ext2_sb.s_block_bitmap_number[i] = 0;
|
sb->u.ext2_sb.s_block_bitmap[i] = NULL;
|
sb->u.ext2_sb.s_block_bitmap[i] = NULL;
|
}
|
}
|
sb->u.ext2_sb.s_loaded_inode_bitmaps = 0;
|
sb->u.ext2_sb.s_loaded_inode_bitmaps = 0;
|
sb->u.ext2_sb.s_loaded_block_bitmaps = 0;
|
sb->u.ext2_sb.s_loaded_block_bitmaps = 0;
|
sb->u.ext2_sb.s_db_per_group = db_count;
|
sb->u.ext2_sb.s_db_per_group = db_count;
|
unlock_super (sb);
|
unlock_super (sb);
|
/*
|
/*
|
* set up enough so that it can read an inode
|
* set up enough so that it can read an inode
|
*/
|
*/
|
sb->s_dev = dev;
|
sb->s_dev = dev;
|
sb->s_op = &ext2_sops;
|
sb->s_op = &ext2_sops;
|
if (!(sb->s_mounted = iget (sb, EXT2_ROOT_INO))) {
|
if (!(sb->s_mounted = iget (sb, EXT2_ROOT_INO))) {
|
sb->s_dev = 0;
|
sb->s_dev = 0;
|
for (i = 0; i < db_count; i++)
|
for (i = 0; i < db_count; i++)
|
if (sb->u.ext2_sb.s_group_desc[i])
|
if (sb->u.ext2_sb.s_group_desc[i])
|
brelse (sb->u.ext2_sb.s_group_desc[i]);
|
brelse (sb->u.ext2_sb.s_group_desc[i]);
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
kfree_s (sb->u.ext2_sb.s_group_desc,
|
db_count * sizeof (struct buffer_head *));
|
db_count * sizeof (struct buffer_head *));
|
brelse (bh);
|
brelse (bh);
|
printk ("EXT2-fs: get root inode failed\n");
|
printk ("EXT2-fs: get root inode failed\n");
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return NULL;
|
return NULL;
|
}
|
}
|
ext2_setup_super (sb, es);
|
ext2_setup_super (sb, es);
|
return sb;
|
return sb;
|
}
|
}
|
|
|
static void ext2_commit_super (struct super_block * sb,
|
static void ext2_commit_super (struct super_block * sb,
|
struct ext2_super_block * es)
|
struct ext2_super_block * es)
|
{
|
{
|
es->s_wtime = swab32(CURRENT_TIME);
|
es->s_wtime = swab32(CURRENT_TIME);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
sb->s_dirt = 0;
|
sb->s_dirt = 0;
|
}
|
}
|
|
|
/*
|
/*
|
* In the second extended file system, it is not necessary to
|
* In the second extended file system, it is not necessary to
|
* write the super block since we use a mapping of the
|
* write the super block since we use a mapping of the
|
* disk super block in a buffer.
|
* disk super block in a buffer.
|
*
|
*
|
* However, this function is still used to set the fs valid
|
* However, this function is still used to set the fs valid
|
* flags to 0. We need to set this flag to 0 since the fs
|
* flags to 0. We need to set this flag to 0 since the fs
|
* may have been checked while mounted and e2fsck may have
|
* may have been checked while mounted and e2fsck may have
|
* set s_state to EXT2_VALID_FS after some corrections.
|
* set s_state to EXT2_VALID_FS after some corrections.
|
*/
|
*/
|
|
|
void ext2_write_super (struct super_block * sb)
|
void ext2_write_super (struct super_block * sb)
|
{
|
{
|
struct ext2_super_block * es;
|
struct ext2_super_block * es;
|
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
if (!(sb->s_flags & MS_RDONLY)) {
|
es = sb->u.ext2_sb.s_es;
|
es = sb->u.ext2_sb.s_es;
|
|
|
ext2_debug ("setting valid to 0\n");
|
ext2_debug ("setting valid to 0\n");
|
|
|
if (swab16(es->s_state) & EXT2_VALID_FS) {
|
if (swab16(es->s_state) & EXT2_VALID_FS) {
|
es->s_state = swab16(swab16(es->s_state) & ~EXT2_VALID_FS);
|
es->s_state = swab16(swab16(es->s_state) & ~EXT2_VALID_FS);
|
es->s_mtime = swab32(CURRENT_TIME);
|
es->s_mtime = swab32(CURRENT_TIME);
|
}
|
}
|
ext2_commit_super (sb, es);
|
ext2_commit_super (sb, es);
|
}
|
}
|
sb->s_dirt = 0;
|
sb->s_dirt = 0;
|
}
|
}
|
|
|
int ext2_remount (struct super_block * sb, int * flags, char * data)
|
int ext2_remount (struct super_block * sb, int * flags, char * data)
|
{
|
{
|
struct ext2_super_block * es;
|
struct ext2_super_block * es;
|
unsigned short resuid = sb->u.ext2_sb.s_resuid;
|
unsigned short resuid = sb->u.ext2_sb.s_resuid;
|
unsigned short resgid = sb->u.ext2_sb.s_resgid;
|
unsigned short resgid = sb->u.ext2_sb.s_resgid;
|
unsigned long new_mount_opt;
|
unsigned long new_mount_opt;
|
unsigned long tmp;
|
unsigned long tmp;
|
|
|
/*
|
/*
|
* Allow the "check" option to be passed as a remount option.
|
* Allow the "check" option to be passed as a remount option.
|
*/
|
*/
|
new_mount_opt = EXT2_MOUNT_CHECK_NORMAL;
|
new_mount_opt = EXT2_MOUNT_CHECK_NORMAL;
|
if (!parse_options (data, &tmp, &resuid, &resgid,
|
if (!parse_options (data, &tmp, &resuid, &resgid,
|
&new_mount_opt))
|
&new_mount_opt))
|
return -EINVAL;
|
return -EINVAL;
|
|
|
sb->u.ext2_sb.s_mount_opt = new_mount_opt;
|
sb->u.ext2_sb.s_mount_opt = new_mount_opt;
|
sb->u.ext2_sb.s_resuid = resuid;
|
sb->u.ext2_sb.s_resuid = resuid;
|
sb->u.ext2_sb.s_resgid = resgid;
|
sb->u.ext2_sb.s_resgid = resgid;
|
es = sb->u.ext2_sb.s_es;
|
es = sb->u.ext2_sb.s_es;
|
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
|
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
|
return 0;
|
return 0;
|
if (*flags & MS_RDONLY) {
|
if (*flags & MS_RDONLY) {
|
if (swab16(es->s_state) & EXT2_VALID_FS ||
|
if (swab16(es->s_state) & EXT2_VALID_FS ||
|
!(sb->u.ext2_sb.s_mount_state & EXT2_VALID_FS))
|
!(sb->u.ext2_sb.s_mount_state & EXT2_VALID_FS))
|
return 0;
|
return 0;
|
/*
|
/*
|
* OK, we are remounting a valid rw partition rdonly, so set
|
* OK, we are remounting a valid rw partition rdonly, so set
|
* the rdonly flag and then mark the partition as valid again.
|
* the rdonly flag and then mark the partition as valid again.
|
*/
|
*/
|
es->s_state = swab16(sb->u.ext2_sb.s_mount_state);
|
es->s_state = swab16(sb->u.ext2_sb.s_mount_state);
|
es->s_mtime = swab32(CURRENT_TIME);
|
es->s_mtime = swab32(CURRENT_TIME);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
|
sb->s_dirt = 1;
|
sb->s_dirt = 1;
|
ext2_commit_super (sb, es);
|
ext2_commit_super (sb, es);
|
}
|
}
|
else {
|
else {
|
/*
|
/*
|
* Mounting a RDONLY partition read-write, so reread and
|
* Mounting a RDONLY partition read-write, so reread and
|
* store the current valid flag. (It may have been changed
|
* store the current valid flag. (It may have been changed
|
* by e2fsck since we originally mounted the partition.)
|
* by e2fsck since we originally mounted the partition.)
|
*/
|
*/
|
sb->u.ext2_sb.s_mount_state = swab16(es->s_state);
|
sb->u.ext2_sb.s_mount_state = swab16(es->s_state);
|
sb->s_flags &= ~MS_RDONLY;
|
sb->s_flags &= ~MS_RDONLY;
|
ext2_setup_super (sb, es);
|
ext2_setup_super (sb, es);
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct file_system_type ext2_fs_type = {
|
static struct file_system_type ext2_fs_type = {
|
ext2_read_super, "ext2", 1, NULL
|
ext2_read_super, "ext2", 1, NULL
|
};
|
};
|
|
|
int init_ext2_fs(void)
|
int init_ext2_fs(void)
|
{
|
{
|
return register_filesystem(&ext2_fs_type);
|
return register_filesystem(&ext2_fs_type);
|
}
|
}
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
int init_module(void)
|
int init_module(void)
|
{
|
{
|
int status;
|
int status;
|
|
|
if ((status = init_ext2_fs()) == 0)
|
if ((status = init_ext2_fs()) == 0)
|
register_symtab(0);
|
register_symtab(0);
|
return status;
|
return status;
|
}
|
}
|
|
|
void cleanup_module(void)
|
void cleanup_module(void)
|
{
|
{
|
unregister_filesystem(&ext2_fs_type);
|
unregister_filesystem(&ext2_fs_type);
|
}
|
}
|
|
|
#endif
|
#endif
|
|
|
void ext2_statfs (struct super_block * sb, struct statfs * buf, int bufsiz)
|
void ext2_statfs (struct super_block * sb, struct statfs * buf, int bufsiz)
|
{
|
{
|
unsigned long overhead;
|
unsigned long overhead;
|
unsigned long overhead_per_group;
|
unsigned long overhead_per_group;
|
struct statfs tmp;
|
struct statfs tmp;
|
|
|
if (test_opt (sb, MINIX_DF))
|
if (test_opt (sb, MINIX_DF))
|
overhead = 0;
|
overhead = 0;
|
else {
|
else {
|
/*
|
/*
|
* Compute the overhead (FS structures)
|
* Compute the overhead (FS structures)
|
*/
|
*/
|
overhead_per_group = 1 /* super block */ +
|
overhead_per_group = 1 /* super block */ +
|
sb->u.ext2_sb.s_db_per_group /* descriptors */ +
|
sb->u.ext2_sb.s_db_per_group /* descriptors */ +
|
1 /* block bitmap */ +
|
1 /* block bitmap */ +
|
1 /* inode bitmap */ +
|
1 /* inode bitmap */ +
|
sb->u.ext2_sb.s_itb_per_group /* inode table */;
|
sb->u.ext2_sb.s_itb_per_group /* inode table */;
|
overhead = swab32(sb->u.ext2_sb.s_es->s_first_data_block) +
|
overhead = swab32(sb->u.ext2_sb.s_es->s_first_data_block) +
|
sb->u.ext2_sb.s_groups_count * overhead_per_group;
|
sb->u.ext2_sb.s_groups_count * overhead_per_group;
|
}
|
}
|
|
|
tmp.f_type = EXT2_SUPER_MAGIC;
|
tmp.f_type = EXT2_SUPER_MAGIC;
|
tmp.f_bsize = sb->s_blocksize;
|
tmp.f_bsize = sb->s_blocksize;
|
tmp.f_blocks = swab32(sb->u.ext2_sb.s_es->s_blocks_count) - overhead;
|
tmp.f_blocks = swab32(sb->u.ext2_sb.s_es->s_blocks_count) - overhead;
|
tmp.f_bfree = ext2_count_free_blocks (sb);
|
tmp.f_bfree = ext2_count_free_blocks (sb);
|
tmp.f_bavail = tmp.f_bfree - swab32(sb->u.ext2_sb.s_es->s_r_blocks_count);
|
tmp.f_bavail = tmp.f_bfree - swab32(sb->u.ext2_sb.s_es->s_r_blocks_count);
|
if (tmp.f_bfree < swab32(sb->u.ext2_sb.s_es->s_r_blocks_count))
|
if (tmp.f_bfree < swab32(sb->u.ext2_sb.s_es->s_r_blocks_count))
|
tmp.f_bavail = 0;
|
tmp.f_bavail = 0;
|
tmp.f_files = swab32(sb->u.ext2_sb.s_es->s_inodes_count);
|
tmp.f_files = swab32(sb->u.ext2_sb.s_es->s_inodes_count);
|
tmp.f_ffree = ext2_count_free_inodes (sb);
|
tmp.f_ffree = ext2_count_free_inodes (sb);
|
tmp.f_namelen = EXT2_NAME_LEN;
|
tmp.f_namelen = EXT2_NAME_LEN;
|
memcpy_tofs(buf, &tmp, bufsiz);
|
memcpy_tofs(buf, &tmp, bufsiz);
|
}
|
}
|
|
|
