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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note *//* * include/linux/bfs_fs.h - BFS data structures on disk. * Copyright (C) 1999-2018 Tigran Aivazian <aivazian.tigran@gmail.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 */