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- #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)
- {
- unsigned int result = 0;
- unsigned char *p = ptr + 511;
-
- do {
- result = (result & 0xff) + (result >> 8);
- result = result + *--p;
- } while (p != ptr);
-
- return (result & 0xff) != ptr[511];
- }
-
- /* 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 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
-