mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
45254b4fb2
Merge include/linux/efs_fs{_i,_dir}.h into fs/efs/efs.h. efs_vh.h remains
there because this is the IRIX volume header and shouldn't really be
handled by efs but by the partitioning code. efs_sb.h remains there for
now because it's exported to userspace. Of course this wrong and aboot
should have a copy of it's own, but I'll leave that to a separate patch to
avoid any contention.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1999 Al Smith
|
|
*
|
|
* Portions derived from work (c) 1995,1996 Christian Vogelgsang.
|
|
* Portions derived from IRIX header files (c) 1988 Silicon Graphics
|
|
*/
|
|
#ifndef _EFS_EFS_H_
|
|
#define _EFS_EFS_H_
|
|
|
|
#include <linux/fs.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#define EFS_VERSION "1.0a"
|
|
|
|
static const char cprt[] = "EFS: "EFS_VERSION" - (c) 1999 Al Smith <Al.Smith@aeschi.ch.eu.org>";
|
|
|
|
|
|
/* 1 block is 512 bytes */
|
|
#define EFS_BLOCKSIZE_BITS 9
|
|
#define EFS_BLOCKSIZE (1 << EFS_BLOCKSIZE_BITS)
|
|
|
|
typedef int32_t efs_block_t;
|
|
typedef uint32_t efs_ino_t;
|
|
|
|
#define EFS_DIRECTEXTENTS 12
|
|
|
|
/*
|
|
* layout of an extent, in memory and on disk. 8 bytes exactly.
|
|
*/
|
|
typedef union extent_u {
|
|
unsigned char raw[8];
|
|
struct extent_s {
|
|
unsigned int ex_magic:8; /* magic # (zero) */
|
|
unsigned int ex_bn:24; /* basic block */
|
|
unsigned int ex_length:8; /* numblocks in this extent */
|
|
unsigned int ex_offset:24; /* logical offset into file */
|
|
} cooked;
|
|
} efs_extent;
|
|
|
|
typedef struct edevs {
|
|
__be16 odev;
|
|
__be32 ndev;
|
|
} efs_devs;
|
|
|
|
/*
|
|
* extent based filesystem inode as it appears on disk. The efs inode
|
|
* is exactly 128 bytes long.
|
|
*/
|
|
struct efs_dinode {
|
|
__be16 di_mode; /* mode and type of file */
|
|
__be16 di_nlink; /* number of links to file */
|
|
__be16 di_uid; /* owner's user id */
|
|
__be16 di_gid; /* owner's group id */
|
|
__be32 di_size; /* number of bytes in file */
|
|
__be32 di_atime; /* time last accessed */
|
|
__be32 di_mtime; /* time last modified */
|
|
__be32 di_ctime; /* time created */
|
|
__be32 di_gen; /* generation number */
|
|
__be16 di_numextents; /* # of extents */
|
|
u_char di_version; /* version of inode */
|
|
u_char di_spare; /* spare - used by AFS */
|
|
union di_addr {
|
|
efs_extent di_extents[EFS_DIRECTEXTENTS];
|
|
efs_devs di_dev; /* device for IFCHR/IFBLK */
|
|
} di_u;
|
|
};
|
|
|
|
/* efs inode storage in memory */
|
|
struct efs_inode_info {
|
|
int numextents;
|
|
int lastextent;
|
|
|
|
efs_extent extents[EFS_DIRECTEXTENTS];
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
#include <linux/efs_fs_sb.h>
|
|
|
|
#define EFS_DIRBSIZE_BITS EFS_BLOCKSIZE_BITS
|
|
#define EFS_DIRBSIZE (1 << EFS_DIRBSIZE_BITS)
|
|
|
|
struct efs_dentry {
|
|
__be32 inode;
|
|
unsigned char namelen;
|
|
char name[3];
|
|
};
|
|
|
|
#define EFS_DENTSIZE (sizeof(struct efs_dentry) - 3 + 1)
|
|
#define EFS_MAXNAMELEN ((1 << (sizeof(char) * 8)) - 1)
|
|
|
|
#define EFS_DIRBLK_HEADERSIZE 4
|
|
#define EFS_DIRBLK_MAGIC 0xbeef /* moo */
|
|
|
|
struct efs_dir {
|
|
__be16 magic;
|
|
unsigned char firstused;
|
|
unsigned char slots;
|
|
|
|
unsigned char space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
|
|
};
|
|
|
|
#define EFS_MAXENTS \
|
|
((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
|
|
(EFS_DENTSIZE + sizeof(char)))
|
|
|
|
#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
|
|
|
|
#define EFS_REALOFF(offset) ((offset << 1))
|
|
|
|
|
|
static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct efs_inode_info, vfs_inode);
|
|
}
|
|
|
|
static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
|
|
{
|
|
return sb->s_fs_info;
|
|
}
|
|
|
|
struct statfs;
|
|
struct fid;
|
|
|
|
extern const struct inode_operations efs_dir_inode_operations;
|
|
extern const struct file_operations efs_dir_operations;
|
|
extern const struct address_space_operations efs_symlink_aops;
|
|
|
|
extern struct inode *efs_iget(struct super_block *, unsigned long);
|
|
extern efs_block_t efs_map_block(struct inode *, efs_block_t);
|
|
extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
|
|
|
|
extern struct dentry *efs_lookup(struct inode *, struct dentry *, struct nameidata *);
|
|
extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
|
|
int fh_len, int fh_type);
|
|
extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
|
|
int fh_len, int fh_type);
|
|
extern struct dentry *efs_get_parent(struct dentry *);
|
|
extern int efs_bmap(struct inode *, int);
|
|
|
|
#endif /* _EFS_EFS_H_ */
|