84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
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/*******************************************************************************/
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/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
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/* */
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/* Sources modifiées du noyau Linux cramfs_fs.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#include "types.h"
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#ifndef _CRAMFS
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#define _CRAMFS
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#define CRAMFS_SIGNATURE "Compressed ROMFS"
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#define CRAMFS_MODE_WIDTH 16
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#define CRAMFS_UID_WIDTH 16
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#define CRAMFS_SIZE_WIDTH 24
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#define CRAMFS_GID_WIDTH 8
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#define CRAMFS_NAMELEN_WIDTH 6
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#define CRAMFS_OFFSET_WIDTH 26
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#define CRAMFS_MAGIC 0x28cd3d45
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#define CRAMFS_MAXPATHLEN (((1 << CRAMFS_NAMELEN_WIDTH) - 1) << 2)
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#define PAD_SIZE 512
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#define PAGE_CACHE_SIZE (4096)
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typedef struct cramfs_inode {
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u32 mode:CRAMFS_MODE_WIDTH;
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u32 uid:CRAMFS_UID_WIDTH;
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u32 size:CRAMFS_SIZE_WIDTH;
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u32 gid:CRAMFS_GID_WIDTH;
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u32 namelen:CRAMFS_NAMELEN_WIDTH;
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u32 offset:CRAMFS_OFFSET_WIDTH;
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} cramfs_inode;
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typedef struct cramfs_info {
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u32 crc;
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u32 edition;
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u32 blocks;
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u32 files;
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} cramfs_info;
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typedef struct cramfs_super {
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u32 magic; /* 0x28cd3d45 - random number */
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u32 size; /* length in bytes */
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u32 flags; /* feature flags */
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u32 future; /* reserved for future use */
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u8 signature[16]; /* "Compressed ROMFS" */
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cramfs_info fsid; /* unique filesystem info */
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u8 name[16]; /* user-defined name */
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cramfs_inode root; /* root inode data */
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} cramfs_super;
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#define S_ISDIR(m) ((m & 0170000) == 0040000) /* directory */
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#define S_ISCHR(m) ((m & 0170000) == 0020000) /* char special */
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#define S_ISBLK(m) ((m & 0170000) == 0060000) /* block special */
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#define S_ISREG(m) ((m & 0170000) == 0100000) /* regular file */
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#define S_ISFIFO(m) ((m & 0170000) == 0010000) /* fifo */
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#define S_ISLNK(m) ((m & 0170000) == 0120000) /* symbolic link */
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#define S_ISSOCK(m) ((m & 0170000) == 0140000) /* socket */
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#define CRAMFS_FLAG_FSID_VERSION_2 0x00000001 /* fsid version #2 */
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#define CRAMFS_FLAG_SORTED_DIRS 0x00000002 /* sorted dirs */
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#define CRAMFS_FLAG_HOLES 0x00000100 /* support for holes */
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#define CRAMFS_FLAG_WRONG_SIGNATURE 0x00000200 /* reserved */
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#define CRAMFS_FLAG_SHIFTED_ROOT_OFFSET 0x00000400 /* shifted root fs */
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#define CRAMFS_FLAG_EXT_BLOCK_POINTERS 0x00000800 /* block pointer extensions */
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#define CRAMFS_SUPPORTED_FLAGS ( 0x000000ff \
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| CRAMFS_FLAG_HOLES \
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| CRAMFS_FLAG_WRONG_SIGNATURE \
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| CRAMFS_FLAG_SHIFTED_ROOT_OFFSET \
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| CRAMFS_FLAG_EXT_BLOCK_POINTERS )
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#define CRAMFS_BLK_FLAG_UNCOMPRESSED (1 << 31)
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#define CRAMFS_BLK_FLAG_DIRECT_PTR (1 << 30)
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#define CRAMFS_BLK_FLAGS ( CRAMFS_BLK_FLAG_UNCOMPRESSED \
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| CRAMFS_BLK_FLAG_DIRECT_PTR )
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#define CRAMFS_BLK_DIRECT_PTR_SHIFT 2
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u32 test_super(u8 *src, u32 length);
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#endif
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