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authorDenys Vlasenko <vda.linux@googlemail.com>2009-10-21 22:38:52 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2009-10-21 22:38:52 (GMT)
commit481ca9604d1d367c02b9f0799a8c4328232900b5 (patch)
tree7b2f7f1ff5069f5566f733ff6d0c3b8ca2676c02
parenta46317b6f34be8575ebf3857c58f9e5a42781a75 (diff)
downloadbusybox-481ca9604d1d367c02b9f0799a8c4328232900b5.tar.gz
busybox-481ca9604d1d367c02b9f0799a8c4328232900b5.tar.bz2
mkfs_ext2: 1.41.9 compat
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--util-linux/mkfs_ext2.c28
1 files changed, 11 insertions, 17 deletions
diff --git a/util-linux/mkfs_ext2.c b/util-linux/mkfs_ext2.c
index 7191a5f..ef22ec7 100644
--- a/util-linux/mkfs_ext2.c
+++ b/util-linux/mkfs_ext2.c
@@ -10,25 +10,19 @@
#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
-#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
+#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
// from e2fsprogs
#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_HASH_HALF_MD4 1
+#define EXT2_FLAGS_SIGNED_HASH 0x0001
+#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);