1336 lines
34 KiB
C
1336 lines
34 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* mke2fs.c - Make a ext2fs filesystem.
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*
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* Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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* 2003, 2004, 2005 by Theodore Ts'o.
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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/* Usage: mke2fs [options] device
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*
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* The device may be a block device or a image of one, but this isn't
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* enforced (but it's not much fun on a character device :-).
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*/
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <time.h>
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#include <getopt.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <mntent.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include "e2fsbb.h"
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#include "ext2fs/ext2_fs.h"
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#include "uuid/uuid.h"
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#include "e2p/e2p.h"
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#include "ext2fs/ext2fs.h"
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#include "util.h"
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#define STRIDE_LENGTH 8
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#ifndef __sparc__
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#define ZAP_BOOTBLOCK
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#endif
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static const char * device_name;
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/* Command line options */
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static int cflag;
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static int quiet;
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static int super_only;
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static int force;
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static int noaction;
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static int journal_size;
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static int journal_flags;
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static const char *bad_blocks_filename;
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static __u32 fs_stride;
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static struct ext2_super_block param;
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static char *creator_os;
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static char *volume_label;
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static char *mount_dir;
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static char *journal_device = NULL;
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static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */
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static int sys_page_size = 4096;
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static int linux_version_code = 0;
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static int int_log2(int arg)
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{
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int l = 0;
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arg >>= 1;
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while (arg) {
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l++;
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arg >>= 1;
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}
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return l;
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}
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static int int_log10(unsigned int arg)
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{
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int l;
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for (l = 0; arg; l++)
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arg = arg / 10;
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return l;
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}
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/*
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* This function sets the default parameters for a filesystem
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*
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* The type is specified by the user. The size is the maximum size
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* (in megabytes) for which a set of parameters applies, with a size
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* of zero meaning that it is the default parameter for the type.
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* Note that order is important in the table below.
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*/
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#define DEF_MAX_BLOCKSIZE -1
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static const char default_str[] = "default";
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struct mke2fs_defaults {
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const char *type;
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int size;
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int blocksize;
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int inode_ratio;
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};
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static const struct mke2fs_defaults settings[] = {
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{ default_str, 0, 4096, 8192 },
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{ default_str, 512, 1024, 4096 },
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{ default_str, 3, 1024, 8192 },
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{ "journal", 0, 4096, 8192 },
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{ "news", 0, 4096, 4096 },
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{ "largefile", 0, 4096, 1024 * 1024 },
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{ "largefile4", 0, 4096, 4096 * 1024 },
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{ 0, 0, 0, 0},
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};
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static void set_fs_defaults(const char *fs_type,
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struct ext2_super_block *super,
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int blocksize, int sector_size,
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int *inode_ratio)
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{
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int megs;
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int ratio = 0;
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const struct mke2fs_defaults *p;
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int use_bsize = 1024;
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megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024;
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if (inode_ratio)
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ratio = *inode_ratio;
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if (!fs_type)
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fs_type = default_str;
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for (p = settings; p->type; p++) {
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if ((strcmp(p->type, fs_type) != 0) &&
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(strcmp(p->type, default_str) != 0))
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continue;
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if ((p->size != 0) && (megs > p->size))
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continue;
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if (ratio == 0)
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*inode_ratio = p->inode_ratio < blocksize ?
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blocksize : p->inode_ratio;
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use_bsize = p->blocksize;
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}
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if (blocksize <= 0) {
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if (use_bsize == DEF_MAX_BLOCKSIZE) {
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use_bsize = sys_page_size;
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if ((linux_version_code < (2*65536 + 6*256)) &&
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(use_bsize > 4096))
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use_bsize = 4096;
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}
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if (sector_size && use_bsize < sector_size)
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use_bsize = sector_size;
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if ((blocksize < 0) && (use_bsize < (-blocksize)))
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use_bsize = -blocksize;
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blocksize = use_bsize;
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super->s_blocks_count /= blocksize / 1024;
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}
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super->s_log_frag_size = super->s_log_block_size =
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int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
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}
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/*
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* Helper function for read_bb_file and test_disk
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*/
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static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk)
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{
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bb_error_msg("Bad block %u out of range; ignored", blk);
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}
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/*
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* Busybox stuff
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*/
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static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
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static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...)
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{
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va_list ap;
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if (retval) {
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va_start(ap, fmt);
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fprintf(stderr, "\nCould not ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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exit(EXIT_FAILURE);
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}
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}
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static void mke2fs_verbose(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
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static void mke2fs_verbose(const char *fmt, ...)
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{
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va_list ap;
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if (!quiet) {
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va_start(ap, fmt);
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vfprintf(stdout, fmt, ap);
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fflush(stdout);
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va_end(ap);
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}
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}
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static void mke2fs_verbose_done(void)
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{
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mke2fs_verbose("done\n");
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}
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static void mke2fs_warning_msg(int retval, char *fmt, ... ) __attribute__ ((format (printf, 2, 3)));
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static void mke2fs_warning_msg(int retval, char *fmt, ... )
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{
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va_list ap;
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if (retval) {
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va_start(ap, fmt);
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fprintf(stderr, "\nWarning: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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}
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}
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/*
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* Reads the bad blocks list from a file
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*/
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static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
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const char *bad_blocks_file)
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{
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FILE *f;
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errcode_t retval;
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f = xfopen_for_read(bad_blocks_file);
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retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
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fclose (f);
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mke2fs_error_msg_and_die(retval, "read bad blocks from list");
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}
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/*
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* Runs the badblocks program to test the disk
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*/
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static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
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{
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FILE *f;
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errcode_t retval;
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char buf[1024];
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sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize,
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quiet ? "" : "-s ", (cflag > 1) ? "-w " : "",
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fs->device_name, fs->super->s_blocks_count);
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mke2fs_verbose("Running command: %s\n", buf);
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f = popen(buf, "r");
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if (!f) {
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bb_perror_msg_and_die("can't run '%s'", buf);
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}
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retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
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pclose(f);
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mke2fs_error_msg_and_die(retval, "read bad blocks from program");
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}
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static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
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{
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dgrp_t i;
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blk_t j;
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unsigned must_be_good;
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blk_t blk;
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badblocks_iterate bb_iter;
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errcode_t retval;
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blk_t group_block;
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int group;
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int group_bad;
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if (!bb_list)
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return;
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/*
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* The primary superblock and group descriptors *must* be
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* good; if not, abort.
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*/
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must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
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for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
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if (ext2fs_badblocks_list_test(bb_list, i)) {
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bb_error_msg_and_die(
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"Block %d in primary superblock/group descriptor area bad\n"
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"Blocks %d through %d must be good in order to build a filesystem\n"
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"Aborting ...", i, fs->super->s_first_data_block, must_be_good);
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}
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}
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/*
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* See if any of the bad blocks are showing up in the backup
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* superblocks and/or group descriptors. If so, issue a
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* warning and adjust the block counts appropriately.
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*/
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group_block = fs->super->s_first_data_block +
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fs->super->s_blocks_per_group;
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for (i = 1; i < fs->group_desc_count; i++) {
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group_bad = 0;
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for (j=0; j < fs->desc_blocks+1; j++) {
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if (ext2fs_badblocks_list_test(bb_list,
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group_block + j)) {
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mke2fs_warning_msg(!group_bad,
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"the backup superblock/group descriptors at block %d contain\n"
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"bad blocks\n", group_block);
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group_bad++;
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group = ext2fs_group_of_blk(fs, group_block+j);
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fs->group_desc[group].bg_free_blocks_count++;
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fs->super->s_free_blocks_count++;
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}
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}
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group_block += fs->super->s_blocks_per_group;
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}
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/*
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* Mark all the bad blocks as used...
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*/
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retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
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mke2fs_error_msg_and_die(retval, "mark bad blocks as used");
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while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
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ext2fs_mark_block_bitmap(fs->block_map, blk);
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ext2fs_badblocks_list_iterate_end(bb_iter);
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}
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/*
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* These functions implement a generalized progress meter.
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*/
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struct progress_struct {
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char format[20];
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char backup[80];
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__u32 max;
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int skip_progress;
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};
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static void progress_init(struct progress_struct *progress,
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const char *label,__u32 max)
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{
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int i;
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memset(progress, 0, sizeof(struct progress_struct));
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if (quiet)
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return;
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/*
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* Figure out how many digits we need
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*/
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i = int_log10(max);
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sprintf(progress->format, "%%%dd/%%%dld", i, i);
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memset(progress->backup, '\b', sizeof(progress->backup)-1);
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progress->backup[sizeof(progress->backup)-1] = 0;
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if ((2*i)+1 < (int) sizeof(progress->backup))
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progress->backup[(2*i)+1] = 0;
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progress->max = max;
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progress->skip_progress = 0;
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if (getenv("MKE2FS_SKIP_PROGRESS"))
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progress->skip_progress++;
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fputs(label, stdout);
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fflush(stdout);
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}
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static void progress_update(struct progress_struct *progress, __u32 val)
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{
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if ((progress->format[0] == 0) || progress->skip_progress)
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return;
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printf(progress->format, val, progress->max);
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fputs(progress->backup, stdout);
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}
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static void progress_close(struct progress_struct *progress)
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{
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if (progress->format[0] == 0)
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return;
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printf("%-28s\n", "done");
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}
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/*
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* Helper function which zeros out _num_ blocks starting at _blk_. In
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* case of an error, the details of the error is returned via _ret_blk_
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* and _ret_count_ if they are non-NULL pointers. Returns 0 on
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* success, and an error code on an error.
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*
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* As a special case, if the first argument is NULL, then it will
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* attempt to free the static zeroizing buffer. (This is to keep
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* programs that check for memory leaks happy.)
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*/
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static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num,
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struct progress_struct *progress,
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blk_t *ret_blk, int *ret_count)
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{
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int j, count, next_update, next_update_incr;
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static char *buf;
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errcode_t retval;
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/* If fs is null, clean up the static buffer and return */
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if (!fs) {
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if (buf) {
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free(buf);
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buf = 0;
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}
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return 0;
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}
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/* Allocate the zeroizing buffer if necessary */
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if (!buf) {
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buf = xzalloc(fs->blocksize * STRIDE_LENGTH);
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}
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/* OK, do the write loop */
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next_update = 0;
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next_update_incr = num / 100;
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if (next_update_incr < 1)
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next_update_incr = 1;
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for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
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count = num - j;
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if (count > STRIDE_LENGTH)
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count = STRIDE_LENGTH;
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retval = io_channel_write_blk(fs->io, blk, count, buf);
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if (retval) {
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if (ret_count)
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*ret_count = count;
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if (ret_blk)
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*ret_blk = blk;
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return retval;
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}
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if (progress && j > next_update) {
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next_update += num / 100;
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progress_update(progress, blk);
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}
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}
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return 0;
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}
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static void write_inode_tables(ext2_filsys fs)
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{
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errcode_t retval;
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blk_t blk;
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dgrp_t i;
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int num;
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struct progress_struct progress;
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if (quiet)
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memset(&progress, 0, sizeof(progress));
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else
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progress_init(&progress, "Writing inode tables: ",
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fs->group_desc_count);
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for (i = 0; i < fs->group_desc_count; i++) {
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progress_update(&progress, i);
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blk = fs->group_desc[i].bg_inode_table;
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num = fs->inode_blocks_per_group;
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retval = zero_blocks(fs, blk, num, 0, &blk, &num);
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mke2fs_error_msg_and_die(retval,
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"write %d blocks in inode table starting at %d.",
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num, blk);
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if (sync_kludge) {
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if (sync_kludge == 1)
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sync();
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else if ((i % sync_kludge) == 0)
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sync();
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}
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}
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zero_blocks(0, 0, 0, 0, 0, 0);
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progress_close(&progress);
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}
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static void create_root_dir(ext2_filsys fs)
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{
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errcode_t retval;
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struct ext2_inode inode;
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retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
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mke2fs_error_msg_and_die(retval, "create root dir");
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if (geteuid()) {
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retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
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mke2fs_error_msg_and_die(retval, "read root inode");
|
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inode.i_uid = getuid();
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if (inode.i_uid)
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inode.i_gid = getgid();
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retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode);
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mke2fs_error_msg_and_die(retval, "set root inode ownership");
|
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}
|
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}
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|
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static void create_lost_and_found(ext2_filsys fs)
|
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{
|
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errcode_t retval;
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ext2_ino_t ino;
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const char *name = "lost+found";
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int i = 1;
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char *msg = "create";
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int lpf_size = 0;
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fs->umask = 077;
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retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
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if (retval) {
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goto CREATE_LOST_AND_FOUND_ERROR;
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}
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retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
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if (retval) {
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msg = "lookup";
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goto CREATE_LOST_AND_FOUND_ERROR;
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}
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|
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for (; i < EXT2_NDIR_BLOCKS; i++) {
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if ((lpf_size += fs->blocksize) >= 16*1024)
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break;
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retval = ext2fs_expand_dir(fs, ino);
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msg = "expand";
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CREATE_LOST_AND_FOUND_ERROR:
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mke2fs_error_msg_and_die(retval, "%s %s", msg, name);
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}
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}
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|
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static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
|
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{
|
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errcode_t retval;
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|
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ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
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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_INO;
|
|
|
|
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_INO |
|
|
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(¶m, 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_positive(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_positive(optarg);
|
|
break;
|
|
#endif
|
|
case 'N':
|
|
num_inodes = xatoi_positive(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,
|
|
¶m.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(¶m),
|
|
&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(¶m))
|
|
param.s_blocks_count &= ~((sys_page_size /
|
|
EXT2_BLOCK_SIZE(¶m))-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, §or_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, ¶m, blocksize, sector_size, &inode_ratio);
|
|
blocksize = EXT2_BLOCK_SIZE(¶m);
|
|
|
|
if (extended_opts)
|
|
parse_extended_opts(¶m, 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_INO) &&
|
|
!(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(¶m) ||
|
|
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, ¶m,
|
|
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_INO) {
|
|
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;
|
|
}
|