| /* 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 */ |