[mirror_ubuntu-hirsute-kernel.git] / include / uapi / linux / bfs_fs.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 *	include/linux/bfs_fs.h - BFS data structures on disk.
 *	Copyright (C) 1999 Tigran Aivazian <tigran@veritas.com>
 */

#ifndef _LINUX_BFS_FS_H
#define _LINUX_BFS_FS_H

#include <linux/types.h>

#define BFS_BSIZE_BITS		9
#define BFS_BSIZE		(1<<BFS_BSIZE_BITS)

#define BFS_MAGIC		0x1BADFACE
#define BFS_ROOT_INO		2
#define BFS_INODES_PER_BLOCK	8

/* SVR4 vnode type values (bfs_inode->i_vtype) */
#define BFS_VDIR 2L
#define BFS_VREG 1L

/* BFS inode layout on disk */
struct bfs_inode {
	__le16 i_ino;
	__u16 i_unused;
	__le32 i_sblock;
	__le32 i_eblock;
	__le32 i_eoffset;
	__le32 i_vtype;
	__le32 i_mode;
	__le32 i_uid;
	__le32 i_gid;
	__le32 i_nlink;
	__le32 i_atime;
	__le32 i_mtime;
	__le32 i_ctime;
	__u32 i_padding[4];
};

#define BFS_NAMELEN		14	
#define BFS_DIRENT_SIZE		16
#define BFS_DIRS_PER_BLOCK	32

struct bfs_dirent {
	__le16 ino;
	char name[BFS_NAMELEN];
};

/* BFS superblock layout on disk */
struct bfs_super_block {
	__le32 s_magic;
	__le32 s_start;
	__le32 s_end;
	__le32 s_from;
	__le32 s_to;
	__s32 s_bfrom;
	__s32 s_bto;
	char  s_fsname[6];
	char  s_volume[6];
	__u32 s_padding[118];
};


#define BFS_OFF2INO(offset) \
        ((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO)

#define BFS_INO2OFF(ino) \
	((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE)
#define BFS_NZFILESIZE(ip) \
        ((le32_to_cpu((ip)->i_eoffset) + 1) -  le32_to_cpu((ip)->i_sblock) * BFS_BSIZE)

#define BFS_FILESIZE(ip) \
        ((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip))

#define BFS_FILEBLOCKS(ip) \
        ((ip)->i_sblock == 0 ? 0 : (le32_to_cpu((ip)->i_eblock) + 1) -  le32_to_cpu((ip)->i_sblock))
#define BFS_UNCLEAN(bfs_sb, sb)	\
	((le32_to_cpu(bfs_sb->s_from) != -1) && (le32_to_cpu(bfs_sb->s_to) != -1) && !(sb->s_flags & SB_RDONLY))


#endif	/* _LINUX_BFS_FS_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
1da177e4 LT	2	/*
	3	* include/linux/bfs_fs.h - BFS data structures on disk.
	4	* Copyright (C) 1999 Tigran Aivazian <tigran@veritas.com>
	5	*/
	6
	7	#ifndef _LINUX_BFS_FS_H
	8	#define _LINUX_BFS_FS_H
	9
1da9ebd5 JSR	10	#include <linux/types.h>
1da9ebd5 JSR	11
1da177e4 LT	12	#define BFS_BSIZE_BITS 9
	13	#define BFS_BSIZE (1<<BFS_BSIZE_BITS)
	14
	15	#define BFS_MAGIC 0x1BADFACE
	16	#define BFS_ROOT_INO 2
	17	#define BFS_INODES_PER_BLOCK 8
	18
	19	/* SVR4 vnode type values (bfs_inode->i_vtype) */
fac92bec AS	20	#define BFS_VDIR 2L
	21	#define BFS_VREG 1L
	22
1da177e4 LT	23	/* BFS inode layout on disk */
1da177e4 LT	24	struct bfs_inode {
ce0fe7e7	25	__le16 i_ino;
1da177e4	26	__u16 i_unused;
ce0fe7e7 AD	27	__le32 i_sblock;
	28	__le32 i_eblock;
	29	__le32 i_eoffset;
	30	__le32 i_vtype;
	31	__le32 i_mode;
	32	__le32 i_uid;
	33	__le32 i_gid;
	34	__le32 i_nlink;
	35	__le32 i_atime;
	36	__le32 i_mtime;
	37	__le32 i_ctime;
1da177e4 LT	38	__u32 i_padding[4];
	39	};
	40
	41	#define BFS_NAMELEN 14
	42	#define BFS_DIRENT_SIZE 16
	43	#define BFS_DIRS_PER_BLOCK 32
	44
	45	struct bfs_dirent {
ce0fe7e7	46	__le16 ino;
1da177e4 LT	47	char name[BFS_NAMELEN];
	48	};
	49
	50	/* BFS superblock layout on disk */
	51	struct bfs_super_block {
ce0fe7e7 AD	52	__le32 s_magic;
	53	__le32 s_start;
	54	__le32 s_end;
	55	__le32 s_from;
	56	__le32 s_to;
1da177e4 LT	57	__s32 s_bfrom;
	58	__s32 s_bto;
	59	char s_fsname[6];
	60	char s_volume[6];
	61	__u32 s_padding[118];
	62	};
	63
1da177e4 LT	64
	65	#define BFS_OFF2INO(offset) \
	66	((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO)
	67
	68	#define BFS_INO2OFF(ino) \
	69	((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE)
fac92bec	70	#define BFS_NZFILESIZE(ip) \
ce0fe7e7	71	((le32_to_cpu((ip)->i_eoffset) + 1) - le32_to_cpu((ip)->i_sblock) * BFS_BSIZE)
fac92bec AS	72
	73	#define BFS_FILESIZE(ip) \
	74	((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip))
1da177e4	75
fac92bec	76	#define BFS_FILEBLOCKS(ip) \
ce0fe7e7	77	((ip)->i_sblock == 0 ? 0 : (le32_to_cpu((ip)->i_eblock) + 1) - le32_to_cpu((ip)->i_sblock))
1da177e4	78	#define BFS_UNCLEAN(bfs_sb, sb) \
1751e8a6	79	((le32_to_cpu(bfs_sb->s_from) != -1) && (le32_to_cpu(bfs_sb->s_to) != -1) && !(sb->s_flags & SB_RDONLY))
fac92bec	80
1da177e4 LT	81
1da177e4 LT	82	#endif /* _LINUX_BFS_FS_H */