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Edit File : bfs_fs.h \| Size : 1.85 KB
/* 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 */ Back

Edit File : bfs_fs.h | Size : 1.85 KB

/* 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 */

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