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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/adfs/adfs.h | |
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Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/adfs/adfs.h')
-rw-r--r-- | fs/adfs/adfs.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h new file mode 100644 index 0000000..63f5df9 --- /dev/null +++ b/fs/adfs/adfs.h @@ -0,0 +1,127 @@ +/* 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 <linux/version.h> +#include "dir_f.h" + +struct buffer_head; + +/* + * 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; +}; + +/* Inode stuff */ +struct inode *adfs_iget(struct super_block *sb, struct object_info *obj); +int 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, unsigned int frag_id, unsigned 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) + +/* 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 << ADFS_SB(sb)->s_log2sharesize; + } + + return adfs_map_lookup(sb, object_id >> 8, block); +} |