1*53ee8cc1Swenshuai.xi /* 2*53ee8cc1Swenshuai.xi * include/linux/bfs_fs.h - BFS data structures on disk. 3*53ee8cc1Swenshuai.xi * Copyright (C) 1999 Tigran Aivazian <tigran@veritas.com> 4*53ee8cc1Swenshuai.xi */ 5*53ee8cc1Swenshuai.xi 6*53ee8cc1Swenshuai.xi #ifndef _LINUX_BFS_FS_H 7*53ee8cc1Swenshuai.xi #define _LINUX_BFS_FS_H 8*53ee8cc1Swenshuai.xi 9*53ee8cc1Swenshuai.xi #define BFS_BSIZE_BITS 9 10*53ee8cc1Swenshuai.xi #define BFS_BSIZE (1<<BFS_BSIZE_BITS) 11*53ee8cc1Swenshuai.xi 12*53ee8cc1Swenshuai.xi #define BFS_MAGIC 0x1BADFACE 13*53ee8cc1Swenshuai.xi #define BFS_ROOT_INO 2 14*53ee8cc1Swenshuai.xi #define BFS_INODES_PER_BLOCK 8 15*53ee8cc1Swenshuai.xi 16*53ee8cc1Swenshuai.xi /* SVR4 vnode type values (bfs_inode->i_vtype) */ 17*53ee8cc1Swenshuai.xi #define BFS_VDIR 2L 18*53ee8cc1Swenshuai.xi #define BFS_VREG 1L 19*53ee8cc1Swenshuai.xi 20*53ee8cc1Swenshuai.xi 21*53ee8cc1Swenshuai.xi /* BFS inode layout on disk */ 22*53ee8cc1Swenshuai.xi struct bfs_inode { 23*53ee8cc1Swenshuai.xi __le16 i_ino; 24*53ee8cc1Swenshuai.xi __u16 i_unused; 25*53ee8cc1Swenshuai.xi __le32 i_sblock; 26*53ee8cc1Swenshuai.xi __le32 i_eblock; 27*53ee8cc1Swenshuai.xi __le32 i_eoffset; 28*53ee8cc1Swenshuai.xi __le32 i_vtype; 29*53ee8cc1Swenshuai.xi __le32 i_mode; 30*53ee8cc1Swenshuai.xi __le32 i_uid; 31*53ee8cc1Swenshuai.xi __le32 i_gid; 32*53ee8cc1Swenshuai.xi __le32 i_nlink; 33*53ee8cc1Swenshuai.xi __le32 i_atime; 34*53ee8cc1Swenshuai.xi __le32 i_mtime; 35*53ee8cc1Swenshuai.xi __le32 i_ctime; 36*53ee8cc1Swenshuai.xi __u32 i_padding[4]; 37*53ee8cc1Swenshuai.xi }; 38*53ee8cc1Swenshuai.xi 39*53ee8cc1Swenshuai.xi #define BFS_NAMELEN 14 40*53ee8cc1Swenshuai.xi #define BFS_DIRENT_SIZE 16 41*53ee8cc1Swenshuai.xi #define BFS_DIRS_PER_BLOCK 32 42*53ee8cc1Swenshuai.xi 43*53ee8cc1Swenshuai.xi struct bfs_dirent { 44*53ee8cc1Swenshuai.xi __le16 ino; 45*53ee8cc1Swenshuai.xi char name[BFS_NAMELEN]; 46*53ee8cc1Swenshuai.xi }; 47*53ee8cc1Swenshuai.xi 48*53ee8cc1Swenshuai.xi /* BFS superblock layout on disk */ 49*53ee8cc1Swenshuai.xi struct bfs_super_block { 50*53ee8cc1Swenshuai.xi __le32 s_magic; 51*53ee8cc1Swenshuai.xi __le32 s_start; 52*53ee8cc1Swenshuai.xi __le32 s_end; 53*53ee8cc1Swenshuai.xi __le32 s_from; 54*53ee8cc1Swenshuai.xi __le32 s_to; 55*53ee8cc1Swenshuai.xi __s32 s_bfrom; 56*53ee8cc1Swenshuai.xi __s32 s_bto; 57*53ee8cc1Swenshuai.xi char s_fsname[6]; 58*53ee8cc1Swenshuai.xi char s_volume[6]; 59*53ee8cc1Swenshuai.xi __u32 s_padding[118]; 60*53ee8cc1Swenshuai.xi }; 61*53ee8cc1Swenshuai.xi 62*53ee8cc1Swenshuai.xi 63*53ee8cc1Swenshuai.xi #define BFS_OFF2INO(offset) \ 64*53ee8cc1Swenshuai.xi ((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO) 65*53ee8cc1Swenshuai.xi 66*53ee8cc1Swenshuai.xi #define BFS_INO2OFF(ino) \ 67*53ee8cc1Swenshuai.xi ((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE) 68*53ee8cc1Swenshuai.xi #define BFS_NZFILESIZE(ip) \ 69*53ee8cc1Swenshuai.xi ((le32_to_cpu((ip)->i_eoffset) + 1) - le32_to_cpu((ip)->i_sblock) * BFS_BSIZE) 70*53ee8cc1Swenshuai.xi 71*53ee8cc1Swenshuai.xi #define BFS_FILESIZE(ip) \ 72*53ee8cc1Swenshuai.xi ((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip)) 73*53ee8cc1Swenshuai.xi 74*53ee8cc1Swenshuai.xi #define BFS_FILEBLOCKS(ip) \ 75*53ee8cc1Swenshuai.xi ((ip)->i_sblock == 0 ? 0 : (le32_to_cpu((ip)->i_eblock) + 1) - le32_to_cpu((ip)->i_sblock)) 76*53ee8cc1Swenshuai.xi #define BFS_UNCLEAN(bfs_sb, sb) \ 77*53ee8cc1Swenshuai.xi ((le32_to_cpu(bfs_sb->s_from) != -1) && (le32_to_cpu(bfs_sb->s_to) != -1) && !(sb->s_flags & MS_RDONLY)) 78*53ee8cc1Swenshuai.xi 79*53ee8cc1Swenshuai.xi 80*53ee8cc1Swenshuai.xi #endif /* _LINUX_BFS_FS_H */ 81