jfs_dmap.c File Reference

#include <linux/fs.h>
#include <linux/slab.h>
#include "jfs_incore.h"
#include "jfs_superblock.h"
#include "jfs_dmap.h"
#include "jfs_imap.h"
#include "jfs_lock.h"
#include "jfs_metapage.h"
#include "jfs_debug.h"
#include "jfs_discard.h"

Go to the source code of this file.

Macros
#define	BMAP_LOCK_INIT(bmp)   mutex_init(&bmp->db_bmaplock)
#define	BMAP_LOCK(bmp)   mutex_lock(&bmp->db_bmaplock)
#define	BMAP_UNLOCK(bmp)   mutex_unlock(&bmp->db_bmaplock)
#define	MAXL0PAGES   (1 + LPERCTL)
#define	MAXL1PAGES   (1 + LPERCTL * MAXL0PAGES)
#define	MAXL2PAGES   (1 + LPERCTL * MAXL1PAGES)
#define	BMAPPGTOLEV(npages)

Functions
int	dbMount (struct inode *ipbmap)
int	dbUnmount (struct inode *ipbmap, int mounterror)
int	dbSync (struct inode *ipbmap)
int	dbFree (struct inode *ip, s64 blkno, s64 nblocks)
int	dbUpdatePMap (struct inode *ipbmap, int free, s64 blkno, s64 nblocks, struct tblock *tblk)
int	dbNextAG (struct inode *ipbmap)
int	dbAlloc (struct inode *ip, s64 hint, s64 nblocks, s64 *results)
int	dbReAlloc (struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks, s64 *results)
s64	dbDiscardAG (struct inode *ip, int agno, s64 minlen)
int	dbAllocBottomUp (struct inode *ip, s64 blkno, s64 nblocks)
int	dbExtendFS (struct inode *ipbmap, s64 blkno, s64 nblocks)
void	dbFinalizeBmap (struct inode *ipbmap)
s64	dbMapFileSizeToMapSize (struct inode *ipbmap)

Macro Definition Documentation

#define BMAP_LOCK

(

bmp

)

mutex_lock(&bmp->db_bmaplock)

Definition at line 71 of file jfs_dmap.c.

#define BMAP_LOCK_INIT

(

bmp

)

mutex_init(&bmp->db_bmaplock)

Definition at line 70 of file jfs_dmap.c.

#define BMAP_UNLOCK

(

bmp

)

mutex_unlock(&bmp->db_bmaplock)

Definition at line 72 of file jfs_dmap.c.

#define BMAPPGTOLEV

(

npages

)

Value:

(((npages) <= 3 + MAXL0PAGES) ? 0 : \
     ((npages) <= 2 + MAXL1PAGES) ? 1 : 2)

Definition at line 4063 of file jfs_dmap.c.

#define MAXL0PAGES   (1 + LPERCTL)

Definition at line 4056 of file jfs_dmap.c.

#define MAXL1PAGES   (1 + LPERCTL * MAXL0PAGES)

Definition at line 4057 of file jfs_dmap.c.

#define MAXL2PAGES   (1 + LPERCTL * MAXL1PAGES)

Definition at line 4058 of file jfs_dmap.c.

Function Documentation

int dbAlloc	(	struct inode *	ip,
		s64	hint,
		s64	nblocks,
		s64 *	results
	)

Definition at line 702 of file jfs_dmap.c.

int dbAllocBottomUp	(	struct inode *	ip,
		s64	blkno,
		s64	nblocks
	)

Definition at line 3222 of file jfs_dmap.c.

s64 dbDiscardAG	(	struct inode *	ip,
		int	agno,
		s64	minlen
	)

Definition at line 1628 of file jfs_dmap.c.

int dbExtendFS	(	struct inode *	ipbmap,
		s64	blkno,
		s64	nblocks
	)

Definition at line 3398 of file jfs_dmap.c.

void dbFinalizeBmap

(

struct inode *

ipbmap

)

Definition at line 3671 of file jfs_dmap.c.

int dbFree	(	struct inode *	ip,
		s64	blkno,
		s64	nblocks
	)

TRIM the blocks, when mounted with discard option

Definition at line 331 of file jfs_dmap.c.

s64 dbMapFileSizeToMapSize

(

struct inode *

ipbmap

)

Definition at line 4067 of file jfs_dmap.c.

int dbMount

(

struct inode *

ipbmap

)

Definition at line 165 of file jfs_dmap.c.

int dbNextAG

(

struct inode *

ipbmap

)

Definition at line 605 of file jfs_dmap.c.

int dbReAlloc	(	struct inode *	ip,
		s64	blkno,
		s64	nblocks,
		s64	addnblocks,
		s64 *	results
	)

Definition at line 980 of file jfs_dmap.c.

int dbSync

(

struct inode *

ipbmap

)

Definition at line 263 of file jfs_dmap.c.

int dbUnmount	(	struct inode *	ipbmap,
		int	mounterror
	)

Definition at line 242 of file jfs_dmap.c.

int dbUpdatePMap	(	struct inode *	ipbmap,
		int	free,
		s64	blkno,
		s64	nblocks,
		struct tblock *	tblk
	)

Definition at line 425 of file jfs_dmap.c.