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82 lines
1.9 KiB
82 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* include/linux/bfs_fs.h - BFS data structures on disk. |
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* Copyright (C) 1999-2018 Tigran Aivazian <[email protected]> |
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*/ |
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#ifndef _LINUX_BFS_FS_H |
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#define _LINUX_BFS_FS_H |
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#include <linux/types.h> |
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#define BFS_BSIZE_BITS 9 |
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#define BFS_BSIZE (1<<BFS_BSIZE_BITS) |
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#define BFS_MAGIC 0x1BADFACE |
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#define BFS_ROOT_INO 2 |
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#define BFS_INODES_PER_BLOCK 8 |
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/* SVR4 vnode type values (bfs_inode->i_vtype) */ |
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#define BFS_VDIR 2L |
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#define BFS_VREG 1L |
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/* BFS inode layout on disk */ |
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struct bfs_inode { |
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__le16 i_ino; |
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__u16 i_unused; |
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__le32 i_sblock; |
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__le32 i_eblock; |
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__le32 i_eoffset; |
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__le32 i_vtype; |
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__le32 i_mode; |
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__le32 i_uid; |
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__le32 i_gid; |
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__le32 i_nlink; |
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__le32 i_atime; |
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__le32 i_mtime; |
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__le32 i_ctime; |
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__u32 i_padding[4]; |
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}; |
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#define BFS_NAMELEN 14 |
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#define BFS_DIRENT_SIZE 16 |
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#define BFS_DIRS_PER_BLOCK 32 |
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struct bfs_dirent { |
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__le16 ino; |
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char name[BFS_NAMELEN]; |
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}; |
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/* BFS superblock layout on disk */ |
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struct bfs_super_block { |
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__le32 s_magic; |
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__le32 s_start; |
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__le32 s_end; |
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__le32 s_from; |
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__le32 s_to; |
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__s32 s_bfrom; |
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__s32 s_bto; |
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char s_fsname[6]; |
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char s_volume[6]; |
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__u32 s_padding[118]; |
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}; |
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#define BFS_OFF2INO(offset) \ |
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((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO) |
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#define BFS_INO2OFF(ino) \ |
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((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE) |
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#define BFS_NZFILESIZE(ip) \ |
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((le32_to_cpu((ip)->i_eoffset) + 1) - le32_to_cpu((ip)->i_sblock) * BFS_BSIZE) |
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#define BFS_FILESIZE(ip) \ |
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((ip)->i_sblock == 0 ? 0 : BFS_NZFILESIZE(ip)) |
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#define BFS_FILEBLOCKS(ip) \ |
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((ip)->i_sblock == 0 ? 0 : (le32_to_cpu((ip)->i_eblock) + 1) - le32_to_cpu((ip)->i_sblock)) |
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#define BFS_UNCLEAN(bfs_sb, sb) \ |
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((le32_to_cpu(bfs_sb->s_from) != -1) && (le32_to_cpu(bfs_sb->s_to) != -1) && !(sb->s_flags & SB_RDONLY)) |
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#endif /* _LINUX_BFS_FS_H */
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