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mkfs_ext2: 1.41.9 compat

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-10-22 00:38:52 +02:00
parent a46317b6f3
commit 481ca9604d
1 changed files with 11 additions and 17 deletions
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24
util-linux/mkfs_ext2.c
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@ -10,10 +10,6 @@
#include "libbb.h"
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <sys/user.h> /* PAGE_SIZE */
#ifndef PAGE_SIZE
# define PAGE_SIZE 4096
#endif
#include "volume_id/volume_id_internal.h"
#define ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT 0
@ -23,12 +19,10 @@
#define s_reserved_gdt_blocks s_padding1
#define s_mkfs_time s_reserved[0]
#define s_flags s_reserved[22]
#define EXT2_HASH_HALF_MD4 1
#define EXT2_FLAGS_SIGNED_HASH 0x0001
// whiteout: for writable overlays
//#define LINUX_S_IFWHT 0160000
//#define EXT2_FEATURE_INCOMPAT_WHITEOUT 0x0020
#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
// storage helpers
char BUG_wrong_field_size(void);
@ -288,9 +282,6 @@ int mkfs_ext2_main(int argc UNUSED_PARAM, char **argv)
if (nblocks != kilobytes)
bb_error_msg_and_die("block count doesn't fit in 32 bits");
#define kilobytes kilobytes_unused_after_this
//compat problem
// if (blocksize < PAGE_SIZE)
// nblocks &= ~((PAGE_SIZE >> blocksize_log2)-1);
// Experimentally, standard mke2fs won't work on images smaller than 60k
if (nblocks < 60)
bb_error_msg_and_die("need >= 60 blocks");
@ -471,19 +462,22 @@ int mkfs_ext2_main(int argc UNUSED_PARAM, char **argv)
STORE_LE(sb->s_mkfs_time, timestamp);
STORE_LE(sb->s_wtime, timestamp);
STORE_LE(sb->s_lastcheck, timestamp);
// misc
// misc. Values are chosen to match mke2fs 1.41.9
STORE_LE(sb->s_state, 1); // TODO: what's 1?
STORE_LE(sb->s_creator_os, EXT2_OS_LINUX);
STORE_LE(sb->s_checkinterval, 24*60*60 * 180); // 180 days
STORE_LE(sb->s_errors, EXT2_ERRORS_DEFAULT);
// mke2fs 1.41.9 also sets EXT3_FEATURE_COMPAT_RESIZE_INODE
// and if >= 0.5GB, EXT3_FEATURE_RO_COMPAT_LARGE_FILE.
// we use values which match "mke2fs -O ^resize_inode":
// in this case 1.41.9 never sets EXT3_FEATURE_RO_COMPAT_LARGE_FILE.
STORE_LE(sb->s_feature_compat, EXT2_FEATURE_COMPAT_SUPP
| (EXT2_FEATURE_COMPAT_RESIZE_INO * ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT)
| (EXT2_FEATURE_COMPAT_DIR_INDEX * ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX)
);
// e2fsck from 1.41.9 doesn't like EXT2_FEATURE_INCOMPAT_WHITEOUT
STORE_LE(sb->s_feature_incompat, EXT2_FEATURE_INCOMPAT_FILETYPE);// | EXT2_FEATURE_INCOMPAT_WHITEOUT;
STORE_LE(sb->s_feature_incompat, EXT2_FEATURE_INCOMPAT_FILETYPE);
STORE_LE(sb->s_feature_ro_compat, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER);
STORE_LE(sb->s_flags, EXT2_FLAGS_SIGNED_HASH * ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX);
STORE_LE(sb->s_flags, EXT2_FLAGS_UNSIGNED_HASH * ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX);
generate_uuid(sb->s_uuid);
if (ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX) {
STORE_LE(sb->s_def_hash_version, EXT2_HASH_HALF_MD4);