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

/*
 * Copyright (c) 2005-2006 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_AOPS_H__
#define __XFS_AOPS_H__

extern struct bio_set *xfs_ioend_bioset;

/*
 * Types of I/O for bmap clustering and I/O completion tracking.
 */
enum {
	XFS_IO_INVALID,		/* initial state */
	XFS_IO_DELALLOC,	/* covers delalloc region */
	XFS_IO_UNWRITTEN,	/* covers allocated but uninitialized data */
	XFS_IO_OVERWRITE,	/* covers already allocated extent */
};

#define XFS_IO_TYPES \
	{ XFS_IO_INVALID,		"invalid" }, \
	{ XFS_IO_DELALLOC,		"delalloc" }, \
	{ XFS_IO_UNWRITTEN,		"unwritten" }, \
	{ XFS_IO_OVERWRITE,		"overwrite" }

/*
 * Structure for buffered I/O completions.
 */
struct xfs_ioend {
	struct list_head	io_list;	/* next ioend in chain */
	unsigned int		io_type;	/* delalloc / unwritten */
	struct inode		*io_inode;	/* file being written to */
	size_t			io_size;	/* size of the extent */
	xfs_off_t		io_offset;	/* offset in the file */
	struct work_struct	io_work;	/* xfsdatad work queue */
	struct xfs_trans	*io_append_trans;/* xact. for size update */
	struct bio		*io_bio;	/* bio being built */
	struct bio		io_inline_bio;	/* MUST BE LAST! */
};

extern const struct address_space_operations xfs_address_space_operations;

int	xfs_get_blocks(struct inode *inode, sector_t offset,
		       struct buffer_head *map_bh, int create);
int	xfs_get_blocks_direct(struct inode *inode, sector_t offset,
			      struct buffer_head *map_bh, int create);
int	xfs_get_blocks_dax_fault(struct inode *inode, sector_t offset,
			         struct buffer_head *map_bh, int create);

int	xfs_end_io_direct_write(struct kiocb *iocb, loff_t offset,
		ssize_t size, void *private);
int	xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);

extern void xfs_count_page_state(struct page *, int *, int *);
extern struct block_device *xfs_find_bdev_for_inode(struct inode *);

#endif /* __XFS_AOPS_H__ */
Commit	Line	Data
65b3da37	1	/*
ad723875	2	* Copyright (c) 2005-2006 Silicon Graphics, Inc.
7b718769	3	* All Rights Reserved.
65b3da37	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
65b3da37 CH	7	* published by the Free Software Foundation.
65b3da37 CH	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.
65b3da37	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
65b3da37 CH	17	*/
	18	#ifndef __XFS_AOPS_H__
	19	#define __XFS_AOPS_H__
	20
0e51a8e1	21	extern struct bio_set *xfs_ioend_bioset;
65b3da37	22
a206c817 CH	23	/*
	24	* Types of I/O for bmap clustering and I/O completion tracking.
	25	*/
	26	enum {
fbcc0256	27	XFS_IO_INVALID, /* initial state */
0d882a36 AR	28	XFS_IO_DELALLOC, /* covers delalloc region */
	29	XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */
	30	XFS_IO_OVERWRITE, /* covers already allocated extent */
a206c817 CH	31	};
	32
	33	#define XFS_IO_TYPES \
fbcc0256	34	{ XFS_IO_INVALID, "invalid" }, \
0d882a36 AR	35	{ XFS_IO_DELALLOC, "delalloc" }, \
	36	{ XFS_IO_UNWRITTEN, "unwritten" }, \
	37	{ XFS_IO_OVERWRITE, "overwrite" }
a206c817	38
f6d6d4fc	39	/*
0e51a8e1	40	* Structure for buffered I/O completions.
f6d6d4fc	41	*/
0e51a8e1	42	struct xfs_ioend {
e10de372	43	struct list_head io_list; /* next ioend in chain */
f6d6d4fc	44	unsigned int io_type; /* delalloc / unwritten */
b677c210	45	struct inode io_inode; / file being written to */
65b3da37 CH	46	size_t io_size; /* size of the extent */
	47	xfs_off_t io_offset; /* offset in the file */
	48	struct work_struct io_work; /* xfsdatad work queue */
281627df	49	struct xfs_trans io_append_trans;/ xact. for size update */
bb18782a	50	struct bio io_bio; / bio being built */
0e51a8e1 CH	51	struct bio io_inline_bio; /* MUST BE LAST! */
0e51a8e1 CH	52	};
65b3da37	53
f5e54d6e	54	extern const struct address_space_operations xfs_address_space_operations;
6b698ede DC	55
	56	int xfs_get_blocks(struct inode *inode, sector_t offset,
	57	struct buffer_head *map_bh, int create);
	58	int xfs_get_blocks_direct(struct inode *inode, sector_t offset,
	59	struct buffer_head *map_bh, int create);
3e12dbbd DC	60	int xfs_get_blocks_dax_fault(struct inode *inode, sector_t offset,
3e12dbbd DC	61	struct buffer_head *map_bh, int create);
f6d6d4fc	62
fa8d972d CH	63	int xfs_end_io_direct_write(struct kiocb *iocb, loff_t offset,
fa8d972d CH	64	ssize_t size, void *private);
e372843a	65	int xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
fa8d972d	66
20cb52eb	67	extern void xfs_count_page_state(struct page , int , int *);
20a90f58	68	extern struct block_device xfs_find_bdev_for_inode(struct inode );
0b1b213f	69
ad723875	70	#endif /* __XFS_AOPS_H__ */