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linux
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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 */
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