patch-2.1.80 linux/include/linux/adfs_fs.h

• Lines: 184
• Date: Tue Jan 20 16:44:58 1998
• Orig file: v2.1.79/linux/include/linux/adfs_fs.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/include/linux/adfs_fs.h linux/include/linux/adfs_fs.h
@@ -0,0 +1,183 @@
+#ifndef _ADFS_FS_H
+#define _ADFS_FS_H
+
+#include <linux/types.h>
+/*
+ * Structures of data on the disk
+ */
+
+/*
+ * Disc Record at disc address 0xc00
+ */
+struct adfs_discrecord {
+    unsigned char  log2secsize;
+    unsigned char  secspertrack;
+    unsigned char  heads;
+    unsigned char  density;
+    unsigned char  idlen;
+    unsigned char  log2bpmb;
+    unsigned char  skew;
+    unsigned char  bootoption;
+    unsigned char  lowsector;
+    unsigned char  nzones;
+    unsigned short zone_spare;
+    unsigned long  root;
+    unsigned long  disc_size;
+    unsigned short disc_id;
+    unsigned char  disc_name[10];
+    unsigned long  disc_type;
+    unsigned long  disc_size_high;
+    unsigned char  log2sharesize:4;
+    unsigned char  unused:4;
+    unsigned char  big_flag:1;
+};
+
+#define ADFS_DISCRECORD		(0xc00)
+#define ADFS_DR_OFFSET		(0x1c0)
+#define ADFS_DR_SIZE		 60
+#define ADFS_SUPER_MAGIC	 0xadf5
+#define ADFS_FREE_FRAG		 0
+#define ADFS_BAD_FRAG		 1
+#define ADFS_ROOT_FRAG		 2
+
+/*
+ * Directory header
+ */
+struct adfs_dirheader {
+	unsigned char startmasseq;
+	unsigned char startname[4];
+};
+
+#define ADFS_NEWDIR_SIZE	2048
+#define ADFS_OLDDIR_SIZE	1024
+#define ADFS_NUM_DIR_ENTRIES	77
+
+/*
+ * Directory entries
+ */
+struct adfs_direntry {
+	char dirobname[10];
+#define ADFS_NAME_LEN 10
+	__u8 dirload[4];
+	__u8 direxec[4];
+	__u8 dirlen[4];
+	__u8 dirinddiscadd[3];
+	__u8 newdiratts;
+#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)
+};
+
+#define ADFS_MAX_NAME_LEN	255
+struct adfs_idir_entry {
+	__u32		inode_no;			/* Address		*/
+	__u32		file_id;			/* file id		*/
+	__u32		name_len;			/* name length		*/
+	__u32		size;				/* size			*/
+	__u32		mtime;				/* modification time	*/
+	__u32		filetype;			/* RiscOS file type	*/
+	__u8		mode;				/* internal mode	*/
+	char		name[ADFS_MAX_NAME_LEN];	/* file name		*/
+};
+
+/*
+ * Directory tail
+ */
+union adfs_dirtail {
+	struct {
+		unsigned char dirlastmask;
+		char dirname[10];
+		unsigned char dirparent[3];
+		char dirtitle[19];
+		unsigned char reserved[14];
+		unsigned char endmasseq;
+		unsigned char endname[4];
+		unsigned char dircheckbyte;
+	} old;
+	struct {
+		unsigned char dirlastmask;
+		unsigned char reserved[2];
+		unsigned char dirparent[3];
+		char dirtitle[19];
+		char dirname[10];
+		unsigned char endmasseq;
+		unsigned char endname[4];
+		unsigned char dircheckbyte;
+	} new;
+};
+
+#ifdef __KERNEL__
+
+
+/*
+ * Calculate the boot block checksum on an ADFS drive.  Note that this will
+ * appear to be correct if the sector contains all zeros, so also check that
+ * the disk size is non-zero!!!
+ */
+ 
+extern inline int adfs_checkbblk(unsigned char *ptr)
+{
+	int i = 511;
+
+	int result = 0;
+
+	do {
+		result = (result & 0xff) + (result >> 8);
+		result = result + ptr[i];
+		i--;
+	}
+	while (i != 0);
+	
+	result &= 0xff;
+	return result != ptr[511];
+	return 0;
+}
+
+/* dir.c */
+extern unsigned int adfs_val (unsigned char *p, int len);
+extern int adfs_dir_read_parent (struct inode *inode, struct buffer_head **bhp);
+extern int adfs_dir_read (struct inode *inode, struct buffer_head **bhp);
+extern int adfs_dir_check (struct inode *inode, struct buffer_head **bhp,
+			   int buffers, union adfs_dirtail *dtp);
+extern void adfs_dir_free (struct buffer_head **bhp, int buffers);
+extern int adfs_dir_get (struct super_block *sb, struct buffer_head **bhp,
+			 int buffers, int pos, unsigned long parent_object_id,
+			 struct adfs_idir_entry *ide);
+extern int adfs_dir_find_entry (struct super_block *sb, struct buffer_head **bhp,
+				int buffers, unsigned int index,
+				struct adfs_idir_entry *ide);
+
+/* inode.c */
+extern int adfs_inode_validate (struct inode *inode);
+extern unsigned long adfs_inode_generate (unsigned long parent_id, int diridx);
+extern unsigned long adfs_inode_objid (struct inode *inode);
+extern unsigned int adfs_parent_bmap (struct inode *inode, int block);
+extern unsigned int adfs_bmap (struct inode *inode, int block);
+extern void adfs_read_inode (struct inode *inode);
+
+/* map.c */
+extern int adfs_map_lookup (struct super_block *sb, int frag_id, int offset);
+
+/* namei.c */
+extern int adfs_lookup (struct inode *dir, struct dentry *dentry);
+
+/* super.c */
+extern int init_adfs_fs (void);
+extern void adfs_error (struct super_block *, const char *, const char *, ...);
+
+/*
+ * Inodes and file operations
+ */
+
+/* dir.c */
+extern struct inode_operations adfs_dir_inode_operations;
+
+/* file.c */
+extern struct inode_operations adfs_file_inode_operations;
+#endif
+
+#endif