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/* 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 unused);
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 file_operations adfs_dir_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 struct file_operations adfs_file_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);
}
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