/* Inode table. This table holds inodes that are currently in use. In some
* cases they have been opened by an open() or creat() system call, in other
* cases the file system itself needs the inode for one reason or another,
* such as to search a directory for a path name.
* The first part of the struct holds fields that are present on the
* disk; the second part holds fields not present on the disk.
*/
#ifndef _INODE_H
#define _INODE_H
#include "super.h"
#define NIL_INODE (inode_t *) 0 /* indicates absence of inode slot */
#define NO_SEEK 0 /* i_seek = NO_SEEK if last op was not SEEK */
#define ISEEK 1 /* i_seek = ISEEK if last op was SEEK */
typedef struct {
mode_t i_mode; /* file type, protection, etc. */
nlink_t i_nlinks; /* how many links to this file */
offset_t i_size; /* current file size in bytes */
zone_t i_zone[V2_NR_TZONES]; /* zone numbers for direct, ind, and dbl ind */
/* The following items are not present on the disk. */
dev_t i_dev; /* which device is the inode on */
ino_t i_num; /* inode number on its (minor) device */
int i_count; /* # times inode used; 0 means slot is free */
int i_ndzones; /* # direct zones (NR_DZONES) */
int i_nindirs; /* # indirect zones per indirect block */
super_block_t *i_sp; /* pointer to super block for inode's device */
char i_seek; /* set on LSEEK, cleared on READ */
} inode_t;
extern inode_t inode[NR_INODES];
#endif /* _INODE_H */