projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/include/linux/ext2_fs.h | |
| 3 | * | |
| 4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
| 5 | * Remy Card (card@masi.ibp.fr) | |
| 6 | * Laboratoire MASI - Institut Blaise Pascal | |
| 7 | * Universite Pierre et Marie Curie (Paris VI) | |
| 8 | * | |
| 9 | * from | |
| 10 | * | |
| 11 | * linux/include/linux/minix_fs.h | |
| 12 | * | |
| 13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef _LINUX_EXT2_FS_H | |
| 17 | #define _LINUX_EXT2_FS_H | |
| 18 | ||
| 19 | #include <linux/types.h> | |
| e18fa700 | 20 | #include <linux/magic.h> |
| 1da177e4 | 21 | |
| f7699f2b | 22 | #define EXT2_NAME_LEN 255 |
| 1da177e4 LT |
23 | |
| 24 | /* | |
| 25 | * Maximal count of links to a file | |
| 26 | */ | |
| 27 | #define EXT2_LINK_MAX 32000 | |
| 28 | ||
| 39429c5e AV |
29 | #define EXT2_SB_MAGIC_OFFSET 0x38 |
| 30 | #define EXT2_SB_BLOCKS_OFFSET 0x04 | |
| 31 | #define EXT2_SB_BSIZE_OFFSET 0x18 | |
| 32 | ||
| 33 | static inline u64 ext2_image_size(void *ext2_sb) | |
| 34 | { | |
| 35 | __u8 *p = ext2_sb; | |
| 36 | if (*(__le16 *)(p + EXT2_SB_MAGIC_OFFSET) != cpu_to_le16(EXT2_SUPER_MAGIC)) | |
| 37 | return 0; | |
| 38 | return (u64)le32_to_cpup((__le32 *)(p + EXT2_SB_BLOCKS_OFFSET)) << | |
| 39 | le32_to_cpup((__le32 *)(p + EXT2_SB_BSIZE_OFFSET)); | |
| 40 | } | |
| 41 | ||
| 1da177e4 | 42 | #endif /* _LINUX_EXT2_FS_H */ |