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/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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 */