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hush/e2fsprogs/old_e2fsprogs/mke2fs.c
Denys Vlasenko 4b1100edd8 *: use NULL for null pointers 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-03-05 14:10:54 +01:00

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/* vi: set sw=4 ts=4: */
/*
* mke2fs.c - Make a ext2fs filesystem.
*
* Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
* 2003, 2004, 2005 by Theodore Ts'o.
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
/* Usage: mke2fs [options] device
*
* The device may be a block device or a image of one, but this isn't
* enforced (but it's not much fun on a character device :-).
*/
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <time.h>
#include <getopt.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <mntent.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include "e2fsbb.h"
#include "ext2fs/ext2_fs.h"
#include "uuid/uuid.h"
#include "e2p/e2p.h"
#include "ext2fs/ext2fs.h"
#include "util.h"
#define STRIDE_LENGTH 8
#ifndef __sparc__
#define ZAP_BOOTBLOCK
#endif
static const char * device_name;
/* Command line options */
static int cflag;
static int quiet;
static int super_only;
static int force;
static int noaction;
static int journal_size;
static int journal_flags;
static const char *bad_blocks_filename;
static __u32 fs_stride;
static struct ext2_super_block param;
static char *creator_os;
static char *volume_label;
static char *mount_dir;
static char *journal_device = NULL;
static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */
static int sys_page_size = 4096;
static int linux_version_code = 0;
static int int_log2(int arg)
{
int l = 0;
arg >>= 1;
while (arg) {
l++;
arg >>= 1;
}
return l;
}
static int int_log10(unsigned int arg)
{
int l;
for (l = 0; arg; l++)
arg = arg / 10;
return l;
}
/*
* This function sets the default parameters for a filesystem
*
* The type is specified by the user. The size is the maximum size
* (in megabytes) for which a set of parameters applies, with a size
* of zero meaning that it is the default parameter for the type.
* Note that order is important in the table below.
*/
#define DEF_MAX_BLOCKSIZE -1
static const char default_str[] = "default";
struct mke2fs_defaults {
const char *type;
int size;
int blocksize;
int inode_ratio;
};
static const struct mke2fs_defaults settings[] = {
{ default_str, 0, 4096, 8192 },
{ default_str, 512, 1024, 4096 },
{ default_str, 3, 1024, 8192 },
{ "journal", 0, 4096, 8192 },
{ "news", 0, 4096, 4096 },
{ "largefile", 0, 4096, 1024 * 1024 },
{ "largefile4", 0, 4096, 4096 * 1024 },
{ 0, 0, 0, 0},
};
static void set_fs_defaults(const char *fs_type,
struct ext2_super_block *super,
int blocksize, int sector_size,
int *inode_ratio)
{
int megs;
int ratio = 0;
const struct mke2fs_defaults *p;
int use_bsize = 1024;
megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024;
if (inode_ratio)
ratio = *inode_ratio;
if (!fs_type)
fs_type = default_str;
for (p = settings; p->type; p++) {
if ((strcmp(p->type, fs_type) != 0) &&
(strcmp(p->type, default_str) != 0))
continue;
if ((p->size != 0) && (megs > p->size))
continue;
if (ratio == 0)
*inode_ratio = p->inode_ratio < blocksize ?
blocksize : p->inode_ratio;
use_bsize = p->blocksize;
}
if (blocksize <= 0) {
if (use_bsize == DEF_MAX_BLOCKSIZE) {
use_bsize = sys_page_size;
if ((linux_version_code < (2*65536 + 6*256)) &&
(use_bsize > 4096))
use_bsize = 4096;
}
if (sector_size && use_bsize < sector_size)
use_bsize = sector_size;
if ((blocksize < 0) && (use_bsize < (-blocksize)))
use_bsize = -blocksize;
blocksize = use_bsize;
super->s_blocks_count /= blocksize / 1024;
}
super->s_log_frag_size = super->s_log_block_size =
int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
}
/*
* Helper function for read_bb_file and test_disk
*/
static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk)
{
bb_error_msg("Bad block %u out of range; ignored", blk);
}
/*
* Busybox stuff
*/
static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...)
{
va_list ap;
if (retval) {
va_start(ap, fmt);
fprintf(stderr, "\nCould not ");
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
exit(EXIT_FAILURE);
}
}
static void mke2fs_verbose(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
static void mke2fs_verbose(const char *fmt, ...)
{
va_list ap;
if (!quiet) {
va_start(ap, fmt);
vfprintf(stdout, fmt, ap);
fflush(stdout);
va_end(ap);
}
}
static void mke2fs_verbose_done(void)
{
mke2fs_verbose("done\n");
}
static void mke2fs_warning_msg(int retval, char *fmt, ... ) __attribute__ ((format (printf, 2, 3)));
static void mke2fs_warning_msg(int retval, char *fmt, ... )
{
va_list ap;
if (retval) {
va_start(ap, fmt);
fprintf(stderr, "\nWarning: ");
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
}
}
/*
* Reads the bad blocks list from a file
*/
static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
const char *bad_blocks_file)
{
FILE *f;
errcode_t retval;
f = xfopen_for_read(bad_blocks_file);
retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
fclose (f);
mke2fs_error_msg_and_die(retval, "read bad blocks from list");
}
/*
* Runs the badblocks program to test the disk
*/
static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
{
FILE *f;
errcode_t retval;
char buf[1024];
sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize,
quiet ? "" : "-s ", (cflag > 1) ? "-w " : "",
fs->device_name, fs->super->s_blocks_count);
mke2fs_verbose("Running command: %s\n", buf);
f = popen(buf, "r");
if (!f) {
bb_perror_msg_and_die("can't run '%s'", buf);
}
retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
pclose(f);
mke2fs_error_msg_and_die(retval, "read bad blocks from program");
}
static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
{
dgrp_t i;
blk_t j;
unsigned must_be_good;
blk_t blk;
badblocks_iterate bb_iter;
errcode_t retval;
blk_t group_block;
int group;
int group_bad;
if (!bb_list)
return;
/*
* The primary superblock and group descriptors *must* be
* good; if not, abort.
*/
must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
if (ext2fs_badblocks_list_test(bb_list, i)) {
bb_error_msg_and_die(
"Block %d in primary superblock/group descriptor area bad\n"
"Blocks %d through %d must be good in order to build a filesystem\n"
"Aborting ...", i, fs->super->s_first_data_block, must_be_good);
}
}
/*
* See if any of the bad blocks are showing up in the backup
* superblocks and/or group descriptors. If so, issue a
* warning and adjust the block counts appropriately.
*/
group_block = fs->super->s_first_data_block +
fs->super->s_blocks_per_group;
for (i = 1; i < fs->group_desc_count; i++) {
group_bad = 0;
for (j=0; j < fs->desc_blocks+1; j++) {
if (ext2fs_badblocks_list_test(bb_list,
group_block + j)) {
mke2fs_warning_msg(!group_bad,
"the backup superblock/group descriptors at block %d contain\n"
"bad blocks\n", group_block);
group_bad++;
group = ext2fs_group_of_blk(fs, group_block+j);
fs->group_desc[group].bg_free_blocks_count++;
fs->super->s_free_blocks_count++;
}
}
group_block += fs->super->s_blocks_per_group;
}
/*
* Mark all the bad blocks as used...
*/
retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
mke2fs_error_msg_and_die(retval, "mark bad blocks as used");
while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
ext2fs_mark_block_bitmap(fs->block_map, blk);
ext2fs_badblocks_list_iterate_end(bb_iter);
}
/*
* These functions implement a generalized progress meter.
*/
struct progress_struct {
char format[20];
char backup[80];
__u32 max;
int skip_progress;
};
static void progress_init(struct progress_struct *progress,
const char *label,__u32 max)
{
int i;
memset(progress, 0, sizeof(struct progress_struct));
if (quiet)
return;
/*
* Figure out how many digits we need
*/
i = int_log10(max);
sprintf(progress->format, "%%%dd/%%%dld", i, i);
memset(progress->backup, '\b', sizeof(progress->backup)-1);
progress->backup[sizeof(progress->backup)-1] = 0;
if ((2*i)+1 < (int) sizeof(progress->backup))
progress->backup[(2*i)+1] = 0;
progress->max = max;
progress->skip_progress = 0;
if (getenv("MKE2FS_SKIP_PROGRESS"))
progress->skip_progress++;
fputs(label, stdout);
fflush(stdout);
}
static void progress_update(struct progress_struct *progress, __u32 val)
{
if ((progress->format[0] == 0) || progress->skip_progress)
return;
printf(progress->format, val, progress->max);
fputs(progress->backup, stdout);
}
static void progress_close(struct progress_struct *progress)
{
if (progress->format[0] == 0)
return;
printf("%-28s\n", "done");
}
/*
* Helper function which zeros out _num_ blocks starting at _blk_. In
* case of an error, the details of the error is returned via _ret_blk_
* and _ret_count_ if they are non-NULL pointers. Returns 0 on
* success, and an error code on an error.
*
* As a special case, if the first argument is NULL, then it will
* attempt to free the static zeroizing buffer. (This is to keep
* programs that check for memory leaks happy.)
*/
static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num,
struct progress_struct *progress,
blk_t *ret_blk, int *ret_count)
{
int j, count, next_update, next_update_incr;
static char *buf;
errcode_t retval;
/* If fs is null, clean up the static buffer and return */
if (!fs) {
if (buf) {
free(buf);
buf = 0;
}
return 0;
}
/* Allocate the zeroizing buffer if necessary */
if (!buf) {
buf = xzalloc(fs->blocksize * STRIDE_LENGTH);
}
/* OK, do the write loop */
next_update = 0;
next_update_incr = num / 100;
if (next_update_incr < 1)
next_update_incr = 1;
for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
count = num - j;
if (count > STRIDE_LENGTH)
count = STRIDE_LENGTH;
retval = io_channel_write_blk(fs->io, blk, count, buf);
if (retval) {
if (ret_count)
*ret_count = count;
if (ret_blk)
*ret_blk = blk;
return retval;
}
if (progress && j > next_update) {
next_update += num / 100;
progress_update(progress, blk);
}
}
return 0;
}
static void write_inode_tables(ext2_filsys fs)
{
errcode_t retval;
blk_t blk;
dgrp_t i;
int num;
struct progress_struct progress;
if (quiet)
memset(&progress, 0, sizeof(progress));
else
progress_init(&progress, "Writing inode tables: ",
fs->group_desc_count);
for (i = 0; i < fs->group_desc_count; i++) {
progress_update(&progress, i);
blk = fs->group_desc[i].bg_inode_table;
num = fs->inode_blocks_per_group;
retval = zero_blocks(fs, blk, num, 0, &blk, &num);
mke2fs_error_msg_and_die(retval,
"write %d blocks in inode table starting at %d.",
num, blk);
if (sync_kludge) {
if (sync_kludge == 1)
sync();
else if ((i % sync_kludge) == 0)
sync();
}
}
zero_blocks(0, 0, 0, 0, 0, 0);
progress_close(&progress);
}
static void create_root_dir(ext2_filsys fs)
{
errcode_t retval;
struct ext2_inode inode;
retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
mke2fs_error_msg_and_die(retval, "create root dir");
if (geteuid()) {
retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
mke2fs_error_msg_and_die(retval, "read root inode");
inode.i_uid = getuid();
if (inode.i_uid)
inode.i_gid = getgid();
retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode);
mke2fs_error_msg_and_die(retval, "set root inode ownership");
}
}
static void create_lost_and_found(ext2_filsys fs)
{
errcode_t retval;
ext2_ino_t ino;
const char *name = "lost+found";
int i = 1;
char *msg = "create";
int lpf_size = 0;
fs->umask = 077;
retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
if (retval) {
goto CREATE_LOST_AND_FOUND_ERROR;
}
retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
if (retval) {
msg = "lookup";
goto CREATE_LOST_AND_FOUND_ERROR;
}
for (; i < EXT2_NDIR_BLOCKS; i++) {
if ((lpf_size += fs->blocksize) >= 16*1024)
break;
retval = ext2fs_expand_dir(fs, ino);
msg = "expand";
CREATE_LOST_AND_FOUND_ERROR:
mke2fs_error_msg_and_die(retval, "%s %s", msg, name);
}
}
static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
{
errcode_t retval;
ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
fs->group_desc[0].bg_free_inodes_count--;
fs->super->s_free_inodes_count--;
retval = ext2fs_update_bb_inode(fs, bb_list);
mke2fs_error_msg_and_die(retval, "set bad block inode");
}
static void reserve_inodes(ext2_filsys fs)
{
ext2_ino_t i;
int group;
for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
ext2fs_mark_inode_bitmap(fs->inode_map, i);
group = ext2fs_group_of_ino(fs, i);
fs->group_desc[group].bg_free_inodes_count--;
fs->super->s_free_inodes_count--;
}
ext2fs_mark_ib_dirty(fs);
}
#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
#define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */
#define BSD_LABEL_OFFSET 64
static void zap_sector(ext2_filsys fs, int sect, int nsect)
{
char *buf;
char *fmt = "could not %s %d";
int retval;
unsigned int *magic;
buf = xmalloc(512*nsect);
if (sect == 0) {
/* Check for a BSD disklabel, and don't erase it if so */
retval = io_channel_read_blk(fs->io, 0, -512, buf);
if (retval)
mke2fs_warning_msg(retval, fmt, "read block", 0);
else {
magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
if ((*magic == BSD_DISKMAGIC) ||
(*magic == BSD_MAGICDISK))
return;
}
}
memset(buf, 0, 512*nsect);
io_channel_set_blksize(fs->io, 512);
retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf);
io_channel_set_blksize(fs->io, fs->blocksize);
free(buf);
mke2fs_warning_msg(retval, fmt, "erase sector", sect);
}
static void create_journal_dev(ext2_filsys fs)
{
struct progress_struct progress;
errcode_t retval;
char *buf;
char *fmt = "%s journal superblock";
blk_t blk;
int count;
retval = ext2fs_create_journal_superblock(fs,
fs->super->s_blocks_count, 0, &buf);
mke2fs_error_msg_and_die(retval, fmt, "init");
if (quiet)
memset(&progress, 0, sizeof(progress));
else
progress_init(&progress, "Zeroing journal device: ",
fs->super->s_blocks_count);
retval = zero_blocks(fs, 0, fs->super->s_blocks_count,
&progress, &blk, &count);
mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)",
blk, count);
zero_blocks(0, 0, 0, 0, 0, 0);
retval = io_channel_write_blk(fs->io,
fs->super->s_first_data_block+1,
1, buf);
mke2fs_error_msg_and_die(retval, fmt, "write");
progress_close(&progress);
}
static void show_stats(ext2_filsys fs)
{
struct ext2_super_block *s = fs->super;
char *os;
blk_t group_block;
dgrp_t i;
int need, col_left;
mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count),
"%d blocks unused\n", param.s_blocks_count - s->s_blocks_count);
os = e2p_os2string(fs->super->s_creator_os);
printf( "Filesystem label=%.*s\n"
"OS type: %s\n"
"Block size=%u (log=%u)\n"
"Fragment size=%u (log=%u)\n"
"%u inodes, %u blocks\n"
"%u blocks (%2.2f%%) reserved for the super user\n"
"First data block=%u\n",
(int) sizeof(s->s_volume_name),
s->s_volume_name,
os,
fs->blocksize, s->s_log_block_size,
fs->fragsize, s->s_log_frag_size,
s->s_inodes_count, s->s_blocks_count,
s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count,
s->s_first_data_block);
free(os);
if (s->s_reserved_gdt_blocks) {
printf("Maximum filesystem blocks=%lu\n",
(s->s_reserved_gdt_blocks + fs->desc_blocks) *
(fs->blocksize / sizeof(struct ext2_group_desc)) *
s->s_blocks_per_group);
}
printf( "%u block group%s\n"
"%u blocks per group, %u fragments per group\n"
"%u inodes per group\n",
fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "",
s->s_blocks_per_group, s->s_frags_per_group,
s->s_inodes_per_group);
if (fs->group_desc_count == 1) {
bb_putchar('\n');
return;
}
printf("Superblock backups stored on blocks: ");
group_block = s->s_first_data_block;
col_left = 0;
for (i = 1; i < fs->group_desc_count; i++) {
group_block += s->s_blocks_per_group;
if (!ext2fs_bg_has_super(fs, i))
continue;
if (i != 1)
printf(", ");
need = int_log10(group_block) + 2;
if (need > col_left) {
printf("\n\t");
col_left = 72;
}
col_left -= need;
printf("%u", group_block);
}
puts("\n");
}
/*
* Set the S_CREATOR_OS field. Return true if OS is known,
* otherwise, 0.
*/
static int set_os(struct ext2_super_block *sb, char *os)
{
if (isdigit (*os)) {
sb->s_creator_os = atoi(os);
return 1;
}
if ((sb->s_creator_os = e2p_string2os(os)) >= 0) {
return 1;
} else if (!strcasecmp("GNU", os)) {
sb->s_creator_os = EXT2_OS_HURD;
return 1;
}
return 0;
}
static void parse_extended_opts(struct ext2_super_block *sb_param,
const char *opts)
{
char *buf, *token, *next, *p, *arg;
int r_usage = 0;
buf = xstrdup(opts);
for (token = buf; token && *token; token = next) {
p = strchr(token, ',');
next = 0;
if (p) {
*p = 0;
next = p+1;
}
arg = strchr(token, '=');
if (arg) {
*arg = 0;
arg++;
}
if (strcmp(token, "stride") == 0) {
if (!arg) {
r_usage++;
continue;
}
fs_stride = strtoul(arg, &p, 0);
if (*p || (fs_stride == 0)) {
bb_error_msg("Invalid stride parameter: %s", arg);
r_usage++;
continue;
}
} else if (!strcmp(token, "resize")) {
unsigned long resize, bpg, rsv_groups;
unsigned long group_desc_count, desc_blocks;
unsigned int gdpb, blocksize;
int rsv_gdb;
if (!arg) {
r_usage++;
continue;
}
resize = parse_num_blocks(arg,
sb_param->s_log_block_size);
if (resize == 0) {
bb_error_msg("Invalid resize parameter: %s", arg);
r_usage++;
continue;
}
if (resize <= sb_param->s_blocks_count) {
bb_error_msg("The resize maximum must be greater "
"than the filesystem size");
r_usage++;
continue;
}
blocksize = EXT2_BLOCK_SIZE(sb_param);
bpg = sb_param->s_blocks_per_group;
if (!bpg)
bpg = blocksize * 8;
gdpb = blocksize / sizeof(struct ext2_group_desc);
group_desc_count = (sb_param->s_blocks_count +
bpg - 1) / bpg;
desc_blocks = (group_desc_count +
gdpb - 1) / gdpb;
rsv_groups = (resize + bpg - 1) / bpg;
rsv_gdb = (rsv_groups + gdpb - 1) / gdpb -
desc_blocks;
if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param))
rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param);
if (rsv_gdb > 0) {
sb_param->s_feature_compat |=
EXT2_FEATURE_COMPAT_RESIZE_INODE;
sb_param->s_reserved_gdt_blocks = rsv_gdb;
}
} else
r_usage++;
}
if (r_usage) {
bb_error_msg_and_die(
"\nBad options specified.\n\n"
"Extended options are separated by commas, "
"and may take an argument which\n"
"\tis set off by an equals ('=') sign.\n\n"
"Valid extended options are:\n"
"\tstride=<stride length in blocks>\n"
"\tresize=<resize maximum size in blocks>\n");
}
}
static __u32 ok_features[3] = {
EXT3_FEATURE_COMPAT_HAS_JOURNAL |
EXT2_FEATURE_COMPAT_RESIZE_INODE |
EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */
EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
EXT2_FEATURE_INCOMPAT_META_BG,
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */
};
static int PRS(int argc, char **argv)
{
int c;
int size;
char * tmp;
int blocksize = 0;
int inode_ratio = 0;
int inode_size = 0;
int reserved_ratio = 5;
int sector_size = 0;
int show_version_only = 0;
ext2_ino_t num_inodes = 0;
errcode_t retval;
char * extended_opts = NULL;
const char * fs_type = NULL;
blk_t dev_size;
long sysval;
/* Update our PATH to include /sbin */
e2fs_set_sbin_path();
tmp = getenv("MKE2FS_SYNC");
if (tmp)
sync_kludge = atoi(tmp);
/* Determine the system page size if possible */
#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
#define _SC_PAGESIZE _SC_PAGE_SIZE
#endif
#ifdef _SC_PAGESIZE
sysval = sysconf(_SC_PAGESIZE);
if (sysval > 0)
sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
setbuf(stdout, NULL);
setbuf(stderr, NULL);
memset(&param, 0, sizeof(struct ext2_super_block));
param.s_rev_level = 1; /* Create revision 1 filesystems now */
param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE;
param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
#ifdef __linux__
linux_version_code = get_linux_version_code();
if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) {
param.s_rev_level = 0;
param.s_feature_incompat = 0;
param.s_feature_compat = 0;
param.s_feature_ro_compat = 0;
}
#endif
/* If called as mkfs.ext3, create a journal inode */
if (last_char_is(applet_name, '3'))
journal_size = -1;
while ((c = getopt (argc, argv,
"b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) {
switch (c) {
case 'b':
blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
mke2fs_warning_msg((blocksize > 4096),
"blocksize %d not usable on most systems",
blocksize);
param.s_log_block_size =
int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
break;
case 'c': /* Check for bad blocks */
case 't': /* deprecated */
cflag++;
break;
case 'f':
size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
param.s_log_frag_size =
int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option");
break;
case 'g':
param.s_blocks_per_group = xatou32(optarg);
if ((param.s_blocks_per_group % 8) != 0) {
bb_error_msg_and_die("blocks per group must be multiple of 8");
}
break;
case 'i':
/* Huh? is "* 1024" correct? */
inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024);
break;
case 'J':
parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
break;
case 'j':
param.s_feature_compat |=
EXT3_FEATURE_COMPAT_HAS_JOURNAL;
if (!journal_size)
journal_size = -1;
break;
case 'l':
bad_blocks_filename = optarg;
break;
case 'm':
reserved_ratio = xatou_range(optarg, 0, 50);
break;
case 'n':
noaction++;
break;
case 'o':
creator_os = optarg;
break;
case 'r':
param.s_rev_level = xatoi_u(optarg);
if (param.s_rev_level == EXT2_GOOD_OLD_REV) {
param.s_feature_incompat = 0;
param.s_feature_compat = 0;
param.s_feature_ro_compat = 0;
}
break;
case 's': /* deprecated */
if (xatou(optarg))
param.s_feature_ro_compat |=
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
else
param.s_feature_ro_compat &=
~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
break;
#ifdef EXT2_DYNAMIC_REV
case 'I':
inode_size = xatoi_u(optarg);
break;
#endif
case 'N':
num_inodes = xatoi_u(optarg);
break;
case 'v':
quiet = 0;
break;
case 'q':
quiet = 1;
break;
case 'F':
force = 1;
break;
case 'L':
volume_label = optarg;
break;
case 'M':
mount_dir = optarg;
break;
case 'O':
if (!strcmp(optarg, "none")) {
param.s_feature_compat = 0;
param.s_feature_incompat = 0;
param.s_feature_ro_compat = 0;
break;
}
if (e2p_edit_feature(optarg,
&param.s_feature_compat,
ok_features)) {
bb_error_msg_and_die("Invalid filesystem option set: %s", optarg);
}
break;
case 'E':
case 'R':
extended_opts = optarg;
break;
case 'S':
super_only = 1;
break;
case 'T':
fs_type = optarg;
break;
case 'V':
/* Print version number and exit */
show_version_only = 1;
quiet = 0;
break;
default:
bb_show_usage();
}
}
if ((optind == argc) /*&& !show_version_only*/)
bb_show_usage();
device_name = argv[optind++];
mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
if (show_version_only) {
return 0;
}
/*
* If there's no blocksize specified and there is a journal
* device, use it to figure out the blocksize
*/
if (blocksize <= 0 && journal_device) {
ext2_filsys jfs;
io_manager io_ptr;
#ifdef CONFIG_TESTIO_DEBUG
io_ptr = test_io_manager;
test_io_backing_manager = unix_io_manager;
#else
io_ptr = unix_io_manager;
#endif
retval = ext2fs_open(journal_device,
EXT2_FLAG_JOURNAL_DEV_OK, 0,
0, io_ptr, &jfs);
mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device);
if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) {
bb_error_msg_and_die(
"Journal dev blocksize (%d) smaller than "
"minimum blocksize %d\n", jfs->blocksize,
-blocksize);
}
blocksize = jfs->blocksize;
param.s_log_block_size =
int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
ext2fs_close(jfs);
}
if (blocksize > sys_page_size) {
mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)",
blocksize, sys_page_size);
if (!force) {
proceed_question();
}
bb_error_msg("Forced to continue");
}
mke2fs_warning_msg(((blocksize > 4096) &&
(param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)),
"some 2.4 kernels do not support "
"blocksizes greater than 4096 using ext3.\n"
"Use -b 4096 if this is an issue for you\n");
if (optind < argc) {
param.s_blocks_count = parse_num_blocks(argv[optind++],
param.s_log_block_size);
mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]);
}
if (optind < argc)
bb_show_usage();
if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
if (!fs_type)
fs_type = "journal";
reserved_ratio = 0;
param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV;
param.s_feature_compat = 0;
param.s_feature_ro_compat = 0;
}
if (param.s_rev_level == EXT2_GOOD_OLD_REV &&
(param.s_feature_compat || param.s_feature_ro_compat ||
param.s_feature_incompat))
param.s_rev_level = 1; /* Create a revision 1 filesystem */
check_plausibility(device_name , force);
check_mount(device_name, force, "filesystem");
param.s_log_frag_size = param.s_log_block_size;
if (noaction && param.s_blocks_count) {
dev_size = param.s_blocks_count;
retval = 0;
} else {
retry:
retval = ext2fs_get_device_size(device_name,
EXT2_BLOCK_SIZE(&param),
&dev_size);
if ((retval == EFBIG) &&
(blocksize == 0) &&
(param.s_log_block_size == 0)) {
param.s_log_block_size = 2;
blocksize = 4096;
goto retry;
}
}
mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size");
if (!param.s_blocks_count) {
if (retval == EXT2_ET_UNIMPLEMENTED) {
mke2fs_error_msg_and_die(1,
"determine device size; you "
"must specify\nthe size of the "
"filesystem");
} else {
if (dev_size == 0) {
bb_error_msg_and_die(
"Device size reported to be zero. "
"Invalid partition specified, or\n\t"
"partition table wasn't reread "
"after running fdisk, due to\n\t"
"a modified partition being busy "
"and in use. You may need to reboot\n\t"
"to re-read your partition table.\n"
);
}
param.s_blocks_count = dev_size;
if (sys_page_size > EXT2_BLOCK_SIZE(&param))
param.s_blocks_count &= ~((sys_page_size /
EXT2_BLOCK_SIZE(&param))-1);
}
} else if (!force && (param.s_blocks_count > dev_size)) {
bb_error_msg("Filesystem larger than apparent device size");
proceed_question();
}
/*
* If the user asked for HAS_JOURNAL, then make sure a journal
* gets created.
*/
if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
!journal_size)
journal_size = -1;
/* Set first meta blockgroup via an environment variable */
/* (this is mostly for debugging purposes) */
if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
((tmp = getenv("MKE2FS_FIRST_META_BG"))))
param.s_first_meta_bg = atoi(tmp);
/* Get the hardware sector size, if available */
retval = ext2fs_get_device_sectsize(device_name, &sector_size);
mke2fs_error_msg_and_die(retval, "determine hardware sector size");
if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL)
sector_size = atoi(tmp);
set_fs_defaults(fs_type, &param, blocksize, sector_size, &inode_ratio);
blocksize = EXT2_BLOCK_SIZE(&param);
if (extended_opts)
parse_extended_opts(&param, extended_opts);
/* Since sparse_super is the default, we would only have a problem
* here if it was explicitly disabled.
*/
if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
!(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
bb_error_msg_and_die("reserved online resize blocks not supported "
"on non-sparse filesystem");
}
if (param.s_blocks_per_group) {
if (param.s_blocks_per_group < 256 ||
param.s_blocks_per_group > 8 * (unsigned) blocksize) {
bb_error_msg_and_die("blocks per group count out of range");
}
}
if (!force && param.s_blocks_count >= (1 << 31)) {
bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n"
"\t (8TB using a blocksize of 4k) are currently supported.");
}
if (inode_size) {
if (inode_size < EXT2_GOOD_OLD_INODE_SIZE ||
inode_size > EXT2_BLOCK_SIZE(&param) ||
inode_size & (inode_size - 1)) {
bb_error_msg_and_die("invalid inode size %d (min %d/max %d)",
inode_size, EXT2_GOOD_OLD_INODE_SIZE,
blocksize);
}
mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE),
"%d-byte inodes not usable on most systems",
inode_size);
param.s_inode_size = inode_size;
}
/*
* Calculate number of inodes based on the inode ratio
*/
param.s_inodes_count = num_inodes ? num_inodes :
((__u64) param.s_blocks_count * blocksize)
/ inode_ratio;
/*
* Calculate number of blocks to reserve
*/
param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
return 1;
}
static void mke2fs_clean_up(void)
{
if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device);
}
int mke2fs_main (int argc, char **argv);
int mke2fs_main (int argc, char **argv)
{
errcode_t retval;
ext2_filsys fs;
badblocks_list bb_list = 0;
unsigned int i;
int val;
io_manager io_ptr;
if (ENABLE_FEATURE_CLEAN_UP)
atexit(mke2fs_clean_up);
if (!PRS(argc, argv))
return 0;
#ifdef CONFIG_TESTIO_DEBUG
io_ptr = test_io_manager;
test_io_backing_manager = unix_io_manager;
#else
io_ptr = unix_io_manager;
#endif
/*
* Initialize the superblock....
*/
retval = ext2fs_initialize(device_name, 0, &param,
io_ptr, &fs);
mke2fs_error_msg_and_die(retval, "set up superblock");
/*
* Wipe out the old on-disk superblock
*/
if (!noaction)
zap_sector(fs, 2, 6);
/*
* Generate a UUID for it...
*/
uuid_generate(fs->super->s_uuid);
/*
* Initialize the directory index variables
*/
fs->super->s_def_hash_version = EXT2_HASH_TEA;
uuid_generate((unsigned char *) fs->super->s_hash_seed);
/*
* Add "jitter" to the superblock's check interval so that we
* don't check all the filesystems at the same time. We use a
* kludgy hack of using the UUID to derive a random jitter value.
*/
for (i = 0, val = 0; i < sizeof(fs->super->s_uuid); i++)
val += fs->super->s_uuid[i];
fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT;
/*
* Override the creator OS, if applicable
*/
if (creator_os && !set_os(fs->super, creator_os)) {
bb_error_msg_and_die("unknown os - %s", creator_os);
}
/*
* For the Hurd, we will turn off filetype since it doesn't
* support it.
*/
if (fs->super->s_creator_os == EXT2_OS_HURD)
fs->super->s_feature_incompat &=
~EXT2_FEATURE_INCOMPAT_FILETYPE;
/*
* Set the volume label...
*/
if (volume_label) {
snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label);
}
/*
* Set the last mount directory
*/
if (mount_dir) {
snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir);
}
if (!quiet || noaction)
show_stats(fs);
if (noaction)
return 0;
if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
create_journal_dev(fs);
return (ext2fs_close(fs) ? 1 : 0);
}
if (bad_blocks_filename)
read_bb_file(fs, &bb_list, bad_blocks_filename);
if (cflag)
test_disk(fs, &bb_list);
handle_bad_blocks(fs, bb_list);
fs->stride = fs_stride;
retval = ext2fs_allocate_tables(fs);
mke2fs_error_msg_and_die(retval, "allocate filesystem tables");
if (super_only) {
fs->super->s_state |= EXT2_ERROR_FS;
fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
} else {
/* rsv must be a power of two (64kB is MD RAID sb alignment) */
unsigned int rsv = 65536 / fs->blocksize;
unsigned long blocks = fs->super->s_blocks_count;
unsigned long start;
blk_t ret_blk;
#ifdef ZAP_BOOTBLOCK
zap_sector(fs, 0, 2);
#endif
/*
* Wipe out any old MD RAID (or other) metadata at the end
* of the device. This will also verify that the device is
* as large as we think. Be careful with very small devices.
*/
start = (blocks & ~(rsv - 1));
if (start > rsv)
start -= rsv;
if (start > 0)
retval = zero_blocks(fs, start, blocks - start,
NULL, &ret_blk, NULL);
mke2fs_warning_msg(retval, "can't zero block %u at end of filesystem", ret_blk);
write_inode_tables(fs);
create_root_dir(fs);
create_lost_and_found(fs);
reserve_inodes(fs);
create_bad_block_inode(fs, bb_list);
if (fs->super->s_feature_compat &
EXT2_FEATURE_COMPAT_RESIZE_INODE) {
retval = ext2fs_create_resize_inode(fs);
mke2fs_error_msg_and_die(retval, "reserve blocks for online resize");
}
}
if (journal_device) {
make_journal_device(journal_device, fs, quiet, force);
} else if (journal_size) {
make_journal_blocks(fs, journal_size, journal_flags, quiet);
}
mke2fs_verbose("Writing superblocks and filesystem accounting information: ");
retval = ext2fs_flush(fs);
mke2fs_warning_msg(retval, "had trouble writing out superblocks");
mke2fs_verbose_done();
if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG"))
print_check_message(fs);
val = ext2fs_close(fs);
return (retval || val) ? 1 : 0;
}
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