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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [adfs/] [adfs.h] - Rev 1275
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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 dentry_operations adfs_dentry_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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