1/*
 2 * Copyright (c) 2005-2006 Silicon Graphics, Inc.
 3 * All Rights Reserved.
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License as
 7 * published by the Free Software Foundation.
 8 *
 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.
13 *
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
17 */
18#ifndef __XFS_AOPS_H__
19#define __XFS_AOPS_H__
20
21extern struct workqueue_struct *xfsdatad_workqueue;
22extern struct workqueue_struct *xfsconvertd_workqueue;
23extern mempool_t *xfs_ioend_pool;
24
25/*
26 * Types of I/O for bmap clustering and I/O completion tracking.
27 */
28enum {
29	IO_DIRECT = 0,	/* special case for direct I/O ioends */
30	IO_DELALLOC,	/* mapping covers delalloc region */
31	IO_UNWRITTEN,	/* mapping covers allocated but uninitialized data */
32	IO_OVERWRITE,	/* mapping covers already allocated extent */
 
33};
34
35#define XFS_IO_TYPES \
36	{ 0,			"" }, \
37	{ IO_DELALLOC,		"delalloc" }, \
38	{ IO_UNWRITTEN,		"unwritten" }, \
39	{ IO_OVERWRITE,		"overwrite" }
 
40
41/*
42 * xfs_ioend struct manages large extent writes for XFS.
43 * It can manage several multi-page bio's at once.
44 */
45typedef struct xfs_ioend {
46	struct xfs_ioend	*io_list;	/* next ioend in chain */
47	unsigned int		io_type;	/* delalloc / unwritten */
48	int			io_error;	/* I/O error code */
49	atomic_t		io_remaining;	/* hold count */
50	struct inode		*io_inode;	/* file being written to */
51	struct buffer_head	*io_buffer_head;/* buffer linked list head */
52	struct buffer_head	*io_buffer_tail;/* buffer linked list tail */
53	size_t			io_size;	/* size of the extent */
54	xfs_off_t		io_offset;	/* offset in the file */
55	struct work_struct	io_work;	/* xfsdatad work queue */
56	struct kiocb		*io_iocb;
57	int			io_result;
58} xfs_ioend_t;
 
59
60extern const struct address_space_operations xfs_address_space_operations;
61extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
62
63extern void xfs_ioend_init(void);
64extern void xfs_ioend_wait(struct xfs_inode *);
65
66extern void xfs_count_page_state(struct page *, int *, int *);
 
 
67
68#endif /* __XFS_AOPS_H__ */

 1/*
 2 * Copyright (c) 2005-2006 Silicon Graphics, Inc.
 3 * All Rights Reserved.
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License as
 7 * published by the Free Software Foundation.
 8 *
 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.
13 *
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
17 */
18#ifndef __XFS_AOPS_H__
19#define __XFS_AOPS_H__
20
21extern struct bio_set *xfs_ioend_bioset;
 
 
22
23/*
24 * Types of I/O for bmap clustering and I/O completion tracking.
25 */
26enum {
27	XFS_IO_INVALID,		/* initial state */
28	XFS_IO_DELALLOC,	/* covers delalloc region */
29	XFS_IO_UNWRITTEN,	/* covers allocated but uninitialized data */
30	XFS_IO_OVERWRITE,	/* covers already allocated extent */
31	XFS_IO_COW,		/* covers copy-on-write extent */
32};
33
34#define XFS_IO_TYPES \
35	{ XFS_IO_INVALID,		"invalid" }, \
36	{ XFS_IO_DELALLOC,		"delalloc" }, \
37	{ XFS_IO_UNWRITTEN,		"unwritten" }, \
38	{ XFS_IO_OVERWRITE,		"overwrite" }, \
39	{ XFS_IO_COW,			"CoW" }
40
41/*
42 * Structure for buffered I/O completions.
 
43 */
44struct xfs_ioend {
45	struct list_head	io_list;	/* next ioend in chain */
46	unsigned int		io_type;	/* delalloc / unwritten */
 
 
47	struct inode		*io_inode;	/* file being written to */
 
 
48	size_t			io_size;	/* size of the extent */
49	xfs_off_t		io_offset;	/* offset in the file */
50	struct work_struct	io_work;	/* xfsdatad work queue */
51	struct xfs_trans	*io_append_trans;/* xact. for size update */
52	struct bio		*io_bio;	/* bio being built */
53	struct bio		io_inline_bio;	/* MUST BE LAST! */
54};
55
56extern const struct address_space_operations xfs_address_space_operations;
57extern const struct address_space_operations xfs_dax_aops;
58
59int	xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
 
60
61extern void xfs_count_page_state(struct page *, int *, int *);
62extern struct block_device *xfs_find_bdev_for_inode(struct inode *);
63extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *);
64
65#endif /* __XFS_AOPS_H__ */