43 lines
928 B
C
43 lines
928 B
C
/*
|
|
* linux/include/linux/ext2_fs.h
|
|
*
|
|
* Copyright (C) 1992, 1993, 1994, 1995
|
|
* Remy Card (card@masi.ibp.fr)
|
|
* Laboratoire MASI - Institut Blaise Pascal
|
|
* Universite Pierre et Marie Curie (Paris VI)
|
|
*
|
|
* from
|
|
*
|
|
* linux/include/linux/minix_fs.h
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
*/
|
|
|
|
#ifndef _LINUX_EXT2_FS_H
|
|
#define _LINUX_EXT2_FS_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/magic.h>
|
|
|
|
#define EXT2_NAME_LEN 255
|
|
|
|
/*
|
|
* Maximal count of links to a file
|
|
*/
|
|
#define EXT2_LINK_MAX 32000
|
|
|
|
#define EXT2_SB_MAGIC_OFFSET 0x38
|
|
#define EXT2_SB_BLOCKS_OFFSET 0x04
|
|
#define EXT2_SB_BSIZE_OFFSET 0x18
|
|
|
|
static inline u64 ext2_image_size(void *ext2_sb)
|
|
{
|
|
__u8 *p = ext2_sb;
|
|
if (*(__le16 *)(p + EXT2_SB_MAGIC_OFFSET) != cpu_to_le16(EXT2_SUPER_MAGIC))
|
|
return 0;
|
|
return (u64)le32_to_cpup((__le32 *)(p + EXT2_SB_BLOCKS_OFFSET)) <<
|
|
le32_to_cpup((__le32 *)(p + EXT2_SB_BSIZE_OFFSET));
|
|
}
|
|
|
|
#endif /* _LINUX_EXT2_FS_H */
|