patch-2.3.43 linux/fs/adfs/adfs.h

• Lines: 135
• Date: Sun Feb 6 17:45:25 2000
• Orig file: v2.3.42/linux/fs/adfs/adfs.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/fs/adfs/adfs.h linux/fs/adfs/adfs.h
@@ -0,0 +1,134 @@
+/* Internal data structures for ADFS */
+
+#define ADFS_FREE_FRAG		 0
+#define ADFS_BAD_FRAG		 1
+#define ADFS_ROOT_FRAG		 2
+
+#define ADFS_NDA_OWNER_READ	(1 << 0)
+#define ADFS_NDA_OWNER_WRITE	(1 << 1)
+#define ADFS_NDA_LOCKED		(1 << 2)
+#define ADFS_NDA_DIRECTORY	(1 << 3)
+#define ADFS_NDA_EXECUTE	(1 << 4)
+#define ADFS_NDA_PUBLIC_READ	(1 << 5)
+#define ADFS_NDA_PUBLIC_WRITE	(1 << 6)
+
+#include "dir_f.h"
+
+/*
+ * Directory handling
+ */
+struct adfs_dir {
+	struct super_block	*sb;
+
+	int			nr_buffers;
+	struct buffer_head	*bh[4];
+	unsigned int		pos;
+	unsigned int		parent_id;
+
+	struct adfs_dirheader	dirhead;
+	union  adfs_dirtail	dirtail;
+};
+
+/*
+ * This is the overall maximum name length
+ */
+#define ADFS_MAX_NAME_LEN	256
+struct object_info {
+	__u32		parent_id;		/* parent object id	*/
+	__u32		file_id;		/* object id		*/
+	__u32		loadaddr;		/* load address		*/
+	__u32		execaddr;		/* execution address	*/
+	__u32		size;			/* size			*/
+	__u8		attr;			/* RISC OS attributes	*/
+	unsigned char	name_len;		/* name length		*/
+	char		name[ADFS_MAX_NAME_LEN];/* file name		*/
+};
+
+struct adfs_dir_ops {
+	int	(*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
+	int	(*setpos)(struct adfs_dir *dir, unsigned int fpos);
+	int	(*getnext)(struct adfs_dir *dir, struct object_info *obj);
+	int	(*update)(struct adfs_dir *dir, struct object_info *obj);
+	int	(*create)(struct adfs_dir *dir, struct object_info *obj);
+	int	(*remove)(struct adfs_dir *dir, struct object_info *obj);
+	void	(*free)(struct adfs_dir *dir);
+};
+
+struct adfs_discmap {
+	struct buffer_head	*dm_bh;
+	__u32			dm_startblk;
+	unsigned int		dm_startbit;
+	unsigned int		dm_endbit;
+};
+
+/* dir stuff */
+
+
+/* Inode stuff */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+int adfs_get_block(struct inode *inode, long block,
+		   struct buffer_head *bh, int create);
+#else
+int adfs_bmap(struct inode *inode, int block);
+#endif
+struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
+void adfs_read_inode(struct inode *inode);
+void adfs_write_inode(struct inode *inode);
+int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
+
+/* map.c */
+extern int adfs_map_lookup(struct super_block *sb, int frag_id, int offset);
+extern unsigned int adfs_map_free(struct super_block *sb);
+
+/* Misc */
+void __adfs_error(struct super_block *sb, const char *function,
+		  const char *fmt, ...);
+#define adfs_error(sb, fmt...) __adfs_error(sb, __FUNCTION__, fmt)
+
+/* namei.c */
+extern struct dentry *adfs_lookup(struct inode *dir, struct dentry *dentry);
+
+/* super.c */
+
+/*
+ * Inodes and file operations
+ */
+
+/* dir_*.c */
+extern struct inode_operations adfs_dir_inode_operations;
+extern struct adfs_dir_ops adfs_f_dir_ops;
+extern struct adfs_dir_ops adfs_fplus_dir_ops;
+
+extern int adfs_dir_update(struct super_block *sb, struct object_info *obj);
+
+/* file.c */
+extern struct inode_operations adfs_file_inode_operations;
+
+extern inline __u32 signed_asl(__u32 val, signed int shift)
+{
+	if (shift >= 0)
+		val <<= shift;
+	else
+		val >>= -shift;
+	return val;
+}
+
+/*
+ * Calculate the address of a block in an object given the block offset
+ * and the object identity.
+ *
+ * The root directory ID should always be looked up in the map [3.4]
+ */
+extern inline int
+__adfs_block_map(struct super_block *sb, unsigned int object_id,
+		 unsigned int block)
+{
+	if (object_id & 255) {
+		unsigned int off;
+
+		off = (object_id & 255) - 1;
+		block += off << sb->u.adfs_sb.s_log2sharesize;
+	}
+
+	return adfs_map_lookup(sb, object_id >> 8, block);
+}