patch-2.3.25 linux/include/linux/bfs_fs.h

• Lines: 92
• Date: Thu Oct 28 14:45:16 1999
• Orig file: v2.3.24/linux/include/linux/bfs_fs.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.24/linux/include/linux/bfs_fs.h linux/include/linux/bfs_fs.h
@@ -0,0 +1,91 @@
+/*
+ *	include/linux/bfs_fs.h - BFS data structures on disk.
+ *	Copyright (C) 1999 Tigran Aivazian <tigran@ocston.org>
+ */
+
+#ifndef _LINUX_BFS_FS_H
+#define _LINUX_BFS_FS_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		2
+#define BFS_VREG		1
+
+/* BFS inode layout on disk */
+struct bfs_inode {
+	__u16 i_ino;
+	__u16 i_unused;
+	__u32 i_sblock;
+	__u32 i_eblock;
+	__u32 i_eoffset;
+	__u32 i_vtype;
+	__u32 i_mode;
+	__s32 i_uid;
+	__s32 i_gid;
+	__u32 i_nlink;
+	__u32 i_atime;
+	__u32 i_mtime;
+	__u32 i_ctime;
+	__u8  i_padding[16];
+};
+
+#define BFS_NAMELEN		14	
+#define BFS_DIRENT_SIZE		16
+#define BFS_DIRS_PER_BLOCK	32
+
+struct bfs_dirent {
+	__u16 ino;
+	char name[BFS_NAMELEN];
+};
+
+/* BFS superblock layout on disk */
+struct bfs_super_block {
+	__u32 s_magic;
+	__u32 s_start;
+	__u32 s_end;
+	__s32 s_from;
+	__s32 s_to;
+	__s32 s_bfrom;
+	__s32 s_bto;
+	char  s_fsname[6];
+	char  s_volume[6];
+	__u8  s_padding[472];
+};
+
+#define BFS_NZFILESIZE(ip) \
+        (((ip)->i_eoffset + 1) - (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 : ((ip)->i_eblock + 1) - (ip)->i_sblock)
+
+#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_UNCLEAN(bfs_sb, sb)	\
+	((bfs_sb->s_from != -1) && (bfs_sb->s_to != -1) && !(sb->s_flags & MS_RDONLY))
+
+#ifdef __KERNEL__
+
+/* inode.c */
+extern int init_bfs_fs(void);
+
+/* file.c */
+extern struct inode_operations bfs_file_inops;
+
+/* dir.c */
+extern struct inode_operations bfs_dir_inops;
+
+#endif /* __KERNEL__ */
+#endif	/* _LINUX_BFS_FS_H */