[linux-2.6-block.git] / fs / xfs / xfs_buf_item.h

/*
 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef	__XFS_BUF_ITEM_H__
#define	__XFS_BUF_ITEM_H__

/* kernel only definitions */

/* buf log item flags */
#define	XFS_BLI_HOLD		0x01
#define	XFS_BLI_DIRTY		0x02
#define	XFS_BLI_STALE		0x04
#define	XFS_BLI_LOGGED		0x08
#define	XFS_BLI_INODE_ALLOC_BUF	0x10
#define XFS_BLI_STALE_INODE	0x20
#define	XFS_BLI_INODE_BUF	0x40
#define	XFS_BLI_ORDERED		0x80

#define XFS_BLI_FLAGS \
	{ XFS_BLI_HOLD,		"HOLD" }, \
	{ XFS_BLI_DIRTY,	"DIRTY" }, \
	{ XFS_BLI_STALE,	"STALE" }, \
	{ XFS_BLI_LOGGED,	"LOGGED" }, \
	{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
	{ XFS_BLI_STALE_INODE,	"STALE_INODE" }, \
	{ XFS_BLI_INODE_BUF,	"INODE_BUF" }, \
	{ XFS_BLI_ORDERED,	"ORDERED" }


struct xfs_buf;
struct xfs_mount;
struct xfs_buf_log_item;

/*
 * This is the in core log item structure used to track information
 * needed to log buffers.  It tracks how many times the lock has been
 * locked, and which 128 byte chunks of the buffer are dirty.
 */
typedef struct xfs_buf_log_item {
	xfs_log_item_t		bli_item;	/* common item structure */
	struct xfs_buf		*bli_buf;	/* real buffer pointer */
	unsigned int		bli_flags;	/* misc flags */
	unsigned int		bli_recur;	/* lock recursion count */
	atomic_t		bli_refcount;	/* cnt of tp refs */
	int			bli_format_count;	/* count of headers */
	struct xfs_buf_log_format *bli_formats;	/* array of in-log header ptrs */
	struct xfs_buf_log_format __bli_format;	/* embedded in-log header */
} xfs_buf_log_item_t;

int	xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
void	xfs_buf_item_relse(struct xfs_buf *);
void	xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
uint	xfs_buf_item_dirty(xfs_buf_log_item_t *);
void	xfs_buf_attach_iodone(struct xfs_buf *,
			      void(*)(struct xfs_buf *, xfs_log_item_t *),
			      xfs_log_item_t *);
void	xfs_buf_iodone_callbacks(struct xfs_buf *);
void	xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);

extern kmem_zone_t	*xfs_buf_item_zone;

#endif	/* __XFS_BUF_ITEM_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_BUF_ITEM_H__
	19	#define __XFS_BUF_ITEM_H__
	20
a8da0da2	21	/* kernel only definitions */
77c1a08f	22
a8da0da2	23	/* buf log item flags */
1da177e4 LT	24	#define XFS_BLI_HOLD 0x01
	25	#define XFS_BLI_DIRTY 0x02
	26	#define XFS_BLI_STALE 0x04
	27	#define XFS_BLI_LOGGED 0x08
	28	#define XFS_BLI_INODE_ALLOC_BUF 0x10
	29	#define XFS_BLI_STALE_INODE 0x20
ccf7c23f	30	#define XFS_BLI_INODE_BUF 0x40
5f6bed76	31	#define XFS_BLI_ORDERED 0x80
1da177e4	32
0b1b213f CH	33	#define XFS_BLI_FLAGS \
	34	{ XFS_BLI_HOLD, "HOLD" }, \
	35	{ XFS_BLI_DIRTY, "DIRTY" }, \
	36	{ XFS_BLI_STALE, "STALE" }, \
	37	{ XFS_BLI_LOGGED, "LOGGED" }, \
	38	{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
ccf7c23f	39	{ XFS_BLI_STALE_INODE, "STALE_INODE" }, \
5f6bed76 DC	40	{ XFS_BLI_INODE_BUF, "INODE_BUF" }, \
5f6bed76 DC	41	{ XFS_BLI_ORDERED, "ORDERED" }
0b1b213f	42
1da177e4	43
1da177e4	44	struct xfs_buf;
1da177e4 LT	45	struct xfs_mount;
	46	struct xfs_buf_log_item;
	47
1da177e4 LT	48	/*
	49	* This is the in core log item structure used to track information
	50	* needed to log buffers. It tracks how many times the lock has been
	51	* locked, and which 128 byte chunks of the buffer are dirty.
	52	*/
	53	typedef struct xfs_buf_log_item {
	54	xfs_log_item_t bli_item; /* common item structure */
	55	struct xfs_buf bli_buf; / real buffer pointer */
	56	unsigned int bli_flags; /* misc flags */
	57	unsigned int bli_recur; /* lock recursion count */
	58	atomic_t bli_refcount; /* cnt of tp refs */
372cc85e DC	59	int bli_format_count; /* count of headers */
372cc85e DC	60	struct xfs_buf_log_format bli_formats; / array of in-log header ptrs */
b9438173	61	struct xfs_buf_log_format __bli_format; /* embedded in-log header */
1da177e4 LT	62	} xfs_buf_log_item_t;
1da177e4 LT	63
f79af0b9	64	int xfs_buf_item_init(struct xfs_buf , struct xfs_mount );
1da177e4 LT	65	void xfs_buf_item_relse(struct xfs_buf *);
	66	void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
	67	uint xfs_buf_item_dirty(xfs_buf_log_item_t *);
	68	void xfs_buf_attach_iodone(struct xfs_buf *,
	69	void()(struct xfs_buf , xfs_log_item_t *),
	70	xfs_log_item_t *);
	71	void xfs_buf_iodone_callbacks(struct xfs_buf *);
ca30b2a7	72	void xfs_buf_iodone(struct xfs_buf , struct xfs_log_item );
1da177e4	73
a8da0da2	74	extern kmem_zone_t *xfs_buf_item_zone;
1da177e4 LT	75
1da177e4 LT	76	#endif /* __XFS_BUF_ITEM_H__ */