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/* SPDX-License-Identifier: GPL-2.0 */ /* * linux/include/linux/ext2_fs.h * * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card ([email protected]) * 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 */