[net-next-2.6.git] / fs / omfs / omfs_fs.h

#ifndef _OMFS_FS_H
#define _OMFS_FS_H

/* OMFS On-disk structures */

#define OMFS_MAGIC 0xC2993D87
#define OMFS_IMAGIC 0xD2

#define OMFS_DIR 'D'
#define OMFS_FILE 'F'
#define OMFS_INODE_NORMAL 'e'
#define OMFS_INODE_CONTINUATION 'c'
#define OMFS_INODE_SYSTEM 's'
#define OMFS_NAMELEN 256
#define OMFS_DIR_START 0x1b8
#define OMFS_EXTENT_START 0x1d0
#define OMFS_EXTENT_CONT 0x40
#define OMFS_XOR_COUNT 19
#define OMFS_MAX_BLOCK_SIZE 8192

struct omfs_super_block {
	char s_fill1[256];
	__be64 s_root_block;		/* block number of omfs_root_block */
	__be64 s_num_blocks;		/* total number of FS blocks */
	__be32 s_magic;			/* OMFS_MAGIC */
	__be32 s_blocksize;		/* size of a block */
	__be32 s_mirrors;		/* # of mirrors of system blocks */
	__be32 s_sys_blocksize;		/* size of non-data blocks */
};

struct omfs_header {
	__be64 h_self;			/* FS block where this is located */
	__be32 h_body_size;		/* size of useful data after header */
	__be16 h_crc;			/* crc-ccitt of body_size bytes */
	char h_fill1[2];
	u8 h_version;			/* version, always 1 */
	char h_type;			/* OMFS_INODE_X */
	u8 h_magic;			/* OMFS_IMAGIC */
	u8 h_check_xor;			/* XOR of header bytes before this */
	__be32 h_fill2;
};

struct omfs_root_block {
	struct omfs_header r_head;	/* header */
	__be64 r_fill1;
	__be64 r_num_blocks;		/* total number of FS blocks */
	__be64 r_root_dir;		/* block # of root directory */
	__be64 r_bitmap;		/* block # of free space bitmap */
	__be32 r_blocksize;		/* size of a block */
	__be32 r_clustersize;		/* size allocated for data blocks */
	__be64 r_mirrors;		/* # of mirrors of system blocks */
	char r_name[OMFS_NAMELEN];	/* partition label */
};

struct omfs_inode {
	struct omfs_header i_head;	/* header */
	__be64 i_parent;		/* parent containing this inode */
	__be64 i_sibling;		/* next inode in hash bucket */
	__be64 i_ctime;			/* ctime, in milliseconds */
	char i_fill1[35];
	char i_type;			/* OMFS_[DIR,FILE] */
	__be32 i_fill2;
	char i_fill3[64];
	char i_name[OMFS_NAMELEN];	/* filename */
	__be64 i_size;			/* size of file, in bytes */
};

struct omfs_extent_entry {
	__be64 e_cluster;		/* start location of a set of blocks */
	__be64 e_blocks;		/* number of blocks after e_cluster */
};

struct omfs_extent {
	__be64 e_next;			/* next extent table location */
	__be32 e_extent_count;		/* total # extents in this table */
	__be32 e_fill;
	struct omfs_extent_entry e_entry;	/* start of extent entries */
};

#endif
Commit	Line	Data
1b002d7b BC	1	#ifndef _OMFS_FS_H
	2	#define _OMFS_FS_H
	3
	4	/* OMFS On-disk structures */
	5
	6	#define OMFS_MAGIC 0xC2993D87
	7	#define OMFS_IMAGIC 0xD2
	8
	9	#define OMFS_DIR 'D'
	10	#define OMFS_FILE 'F'
	11	#define OMFS_INODE_NORMAL 'e'
	12	#define OMFS_INODE_CONTINUATION 'c'
	13	#define OMFS_INODE_SYSTEM 's'
	14	#define OMFS_NAMELEN 256
	15	#define OMFS_DIR_START 0x1b8
	16	#define OMFS_EXTENT_START 0x1d0
	17	#define OMFS_EXTENT_CONT 0x40
	18	#define OMFS_XOR_COUNT 19
	19	#define OMFS_MAX_BLOCK_SIZE 8192
	20
	21	struct omfs_super_block {
	22	char s_fill1[256];
	23	__be64 s_root_block; /* block number of omfs_root_block */
	24	__be64 s_num_blocks; /* total number of FS blocks */
	25	__be32 s_magic; /* OMFS_MAGIC */
	26	__be32 s_blocksize; /* size of a block */
	27	__be32 s_mirrors; /* # of mirrors of system blocks */
	28	__be32 s_sys_blocksize; /* size of non-data blocks */
	29	};
	30
	31	struct omfs_header {
	32	__be64 h_self; /* FS block where this is located */
	33	__be32 h_body_size; /* size of useful data after header */
	34	__be16 h_crc; /* crc-ccitt of body_size bytes */
	35	char h_fill1[2];
	36	u8 h_version; /* version, always 1 */
	37	char h_type; /* OMFS_INODE_X */
	38	u8 h_magic; /* OMFS_IMAGIC */
	39	u8 h_check_xor; /* XOR of header bytes before this */
	40	__be32 h_fill2;
	41	};
	42
	43	struct omfs_root_block {
	44	struct omfs_header r_head; /* header */
	45	__be64 r_fill1;
	46	__be64 r_num_blocks; /* total number of FS blocks */
	47	__be64 r_root_dir; /* block # of root directory */
	48	__be64 r_bitmap; /* block # of free space bitmap */
	49	__be32 r_blocksize; /* size of a block */
	50	__be32 r_clustersize; /* size allocated for data blocks */
	51	__be64 r_mirrors; /* # of mirrors of system blocks */
	52	char r_name[OMFS_NAMELEN]; /* partition label */
	53	};
	54
	55	struct omfs_inode {
	56	struct omfs_header i_head; /* header */
	57	__be64 i_parent; /* parent containing this inode */
	58	__be64 i_sibling; /* next inode in hash bucket */
	59	__be64 i_ctime; /* ctime, in milliseconds */
	60	char i_fill1[35];
	61	char i_type; /* OMFS_[DIR,FILE] */
	62	__be32 i_fill2;
	63	char i_fill3[64];
	64	char i_name[OMFS_NAMELEN]; /* filename */
65	__be64 i_size; /* size of file, in bytes */
66	};
67
68	struct omfs_extent_entry {
69	__be64 e_cluster; /* start location of a set of blocks */
70	__be64 e_blocks; /* number of blocks after e_cluster */
71	};
72
73	struct omfs_extent {
74	__be64 e_next; /* next extent table location */
75	__be32 e_extent_count; /* total # extents in this table */
76	__be32 e_fill;
77	struct omfs_extent_entry e_entry; /* start of extent entries */
78	};
79
80	#endif