69 строки
1.6 KiB
C
69 строки
1.6 KiB
C
/*
|
|
* efs_fs_i.h
|
|
*
|
|
* Copyright (c) 1999 Al Smith
|
|
*
|
|
* Portions derived from IRIX header files (c) 1988 Silicon Graphics
|
|
*/
|
|
|
|
#ifndef __EFS_FS_I_H__
|
|
#define __EFS_FS_I_H__
|
|
|
|
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;
|
|
};
|
|
|
|
#endif /* __EFS_FS_I_H__ */
|
|
|