diff options
Diffstat (limited to 'include/linux/cramfs_fs.h')
| -rw-r--r-- | include/linux/cramfs_fs.h | 86 |
1 files changed, 1 insertions, 85 deletions
diff --git a/include/linux/cramfs_fs.h b/include/linux/cramfs_fs.h index 0e7bf272ec2f..133789609f23 100644 --- a/include/linux/cramfs_fs.h +++ b/include/linux/cramfs_fs.h @@ -1,94 +1,10 @@ #ifndef __CRAMFS_H #define __CRAMFS_H -#include <linux/types.h> -#include <linux/magic.h> +#include <uapi/linux/cramfs_fs.h> -#define CRAMFS_SIGNATURE "Compressed ROMFS" - -/* - * Width of various bitfields in struct cramfs_inode. - * Primarily used to generate warnings in mkcramfs. - */ -#define CRAMFS_MODE_WIDTH 16 -#define CRAMFS_UID_WIDTH 16 -#define CRAMFS_SIZE_WIDTH 24 -#define CRAMFS_GID_WIDTH 8 -#define CRAMFS_NAMELEN_WIDTH 6 -#define CRAMFS_OFFSET_WIDTH 26 - -/* - * Since inode.namelen is a unsigned 6-bit number, the maximum cramfs - * path length is 63 << 2 = 252. - */ -#define CRAMFS_MAXPATHLEN (((1 << CRAMFS_NAMELEN_WIDTH) - 1) << 2) - -/* - * Reasonably terse representation of the inode data. - */ -struct cramfs_inode { - __u32 mode:CRAMFS_MODE_WIDTH, uid:CRAMFS_UID_WIDTH; - /* SIZE for device files is i_rdev */ - __u32 size:CRAMFS_SIZE_WIDTH, gid:CRAMFS_GID_WIDTH; - /* NAMELEN is the length of the file name, divided by 4 and - rounded up. (cramfs doesn't support hard links.) */ - /* OFFSET: For symlinks and non-empty regular files, this - contains the offset (divided by 4) of the file data in - compressed form (starting with an array of block pointers; - see README). For non-empty directories it is the offset - (divided by 4) of the inode of the first file in that - directory. For anything else, offset is zero. */ - __u32 namelen:CRAMFS_NAMELEN_WIDTH, offset:CRAMFS_OFFSET_WIDTH; -}; - -struct cramfs_info { - __u32 crc; - __u32 edition; - __u32 blocks; - __u32 files; -}; - -/* - * Superblock information at the beginning of the FS. - */ -struct cramfs_super { - __u32 magic; /* 0x28cd3d45 - random number */ - __u32 size; /* length in bytes */ - __u32 flags; /* feature flags */ - __u32 future; /* reserved for future use */ - __u8 signature[16]; /* "Compressed ROMFS" */ - struct cramfs_info fsid; /* unique filesystem info */ - __u8 name[16]; /* user-defined name */ - struct cramfs_inode root; /* root inode data */ -}; - -/* - * Feature flags - * - * 0x00000000 - 0x000000ff: features that work for all past kernels - * 0x00000100 - 0xffffffff: features that don't work for past kernels - */ -#define CRAMFS_FLAG_FSID_VERSION_2 0x00000001 /* fsid version #2 */ -#define CRAMFS_FLAG_SORTED_DIRS 0x00000002 /* sorted dirs */ -#define CRAMFS_FLAG_HOLES 0x00000100 /* support for holes */ -#define CRAMFS_FLAG_WRONG_SIGNATURE 0x00000200 /* reserved */ -#define CRAMFS_FLAG_SHIFTED_ROOT_OFFSET 0x00000400 /* shifted root fs */ - -/* - * Valid values in super.flags. Currently we refuse to mount - * if (flags & ~CRAMFS_SUPPORTED_FLAGS). Maybe that should be - * changed to test super.future instead. - */ -#define CRAMFS_SUPPORTED_FLAGS ( 0x000000ff \ - | CRAMFS_FLAG_HOLES \ - | CRAMFS_FLAG_WRONG_SIGNATURE \ - | CRAMFS_FLAG_SHIFTED_ROOT_OFFSET ) - -#ifdef __KERNEL__ /* Uncompression interfaces to the underlying zlib */ int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen); int cramfs_uncompress_init(void); void cramfs_uncompress_exit(void); -#endif /* __KERNEL__ */ - #endif |