minix/servers/mfs/inode.h
Ben Gras 6c8f7fc3ba netbsd dirent.h, import sys/sys *.h, mfs cleanup
. add all sys/sys headers not already present to help compiling
	. take netbsd dirent.h and struct dirent; main result is
	  introducing d_type and d_namlen that have to be set by getdents()
	  in all FS code implementing it
	. d_off is gone
	. alignment of the struct has become 8 bytes instead of 4
	. remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE
	. libminlib: cleanup unused yet duplicate code
	. mfs: throw out the long-broken v1, v2 support
	. new test for dirent contents filled by getdents()

Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
2014-03-01 09:04:59 +01:00

72 lines
2.8 KiB
C

#ifndef __MFS_INODE_H__
#define __MFS_INODE_H__
/* 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.
*
* Updates:
* 2007-01-06: jfdsmit@gmail.com added i_zsearch
*/
#include <sys/queue.h>
#include <minix/vfsif.h>
#include "super.h"
EXTERN struct inode {
u16_t i_mode; /* file type, protection, etc. */
u16_t i_nlinks; /* how many links to this file */
u16_t i_uid; /* user id of the file's owner */
u16_t i_gid; /* group number */
i32_t i_size; /* current file size in bytes */
u32_t i_atime; /* time of last access (V2 only) */
u32_t i_mtime; /* when was file data last changed */
u32_t i_ctime; /* when was inode itself changed (V2 only)*/
u32_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 */
pino_t i_num; /* inode number on its (minor) device */
int i_count; /* # times inode used; 0 means slot is free */
unsigned int i_ndzones; /* # direct zones (Vx_NR_DZONES) */
unsigned int i_nindirs; /* # indirect zones per indirect block */
struct super_block *i_sp; /* pointer to super block for inode's device */
char i_dirt; /* CLEAN or DIRTY */
zone_t i_zsearch; /* where to start search for new zones */
off_t i_last_dpos; /* where to start dentry search */
char i_mountpoint; /* true if mounted on */
char i_seek; /* set on LSEEK, cleared on READ/WRITE */
char i_update; /* the ATIME, CTIME, and MTIME bits are here */
LIST_ENTRY(inode) i_hash; /* hash list */
TAILQ_ENTRY(inode) i_unused; /* free and unused list */
} inode[NR_INODES];
/* list of unused/free inodes */
EXTERN TAILQ_HEAD(unused_inodes_t, inode) unused_inodes;
/* inode hashtable */
EXTERN LIST_HEAD(inodelist, inode) hash_inodes[INODE_HASH_SIZE];
EXTERN unsigned int inode_cache_hit;
EXTERN unsigned int inode_cache_miss;
/* Field values. Note that CLEAN and DIRTY are defined in "const.h" */
#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 */
#define IN_MARKCLEAN(i) i->i_dirt = IN_CLEAN
#define IN_MARKDIRTY(i) do { if(i->i_sp->s_rd_only) { printf("%s:%d: dirty inode on rofs ", __FILE__, __LINE__); util_stacktrace(); } else { i->i_dirt = IN_DIRTY; } } while(0)
#define IN_ISCLEAN(i) i->i_dirt == IN_CLEAN
#define IN_ISDIRTY(i) i->i_dirt == IN_DIRTY
#endif