diff options
| -rw-r--r-- | util-linux/mkfs_ext2.c | 28 |
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); |