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Christoph Hellwig65b3da32005-09-05 08:18:12 +10001/*
Nathan Scottad723872006-06-09 15:29:12 +10002 * Copyright (c) 2005-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11003 * All Rights Reserved.
Christoph Hellwig65b3da32005-09-05 08:18:12 +10004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Christoph Hellwig65b3da32005-09-05 08:18:12 +10007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Christoph Hellwig65b3da32005-09-05 08:18:12 +100013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Christoph Hellwig65b3da32005-09-05 08:18:12 +100017 */
18#ifndef __XFS_AOPS_H__
19#define __XFS_AOPS_H__
20
Christoph Hellwig65b3da32005-09-05 08:18:12 +100021extern mempool_t *xfs_ioend_pool;
22
Christoph Hellwigf6d6d4f2006-01-11 15:40:13 +110023/*
Christoph Hellwiga206c812010-12-10 08:42:20 +000024 * Types of I/O for bmap clustering and I/O completion tracking.
25 */
26enum {
Alain Renaud0d882a32012-05-22 15:56:21 -050027 XFS_IO_DIRECT = 0, /* special case for direct I/O ioends */
28 XFS_IO_DELALLOC, /* covers delalloc region */
29 XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */
30 XFS_IO_OVERWRITE, /* covers already allocated extent */
Christoph Hellwiga206c812010-12-10 08:42:20 +000031};
32
33#define XFS_IO_TYPES \
34 { 0, "" }, \
Alain Renaud0d882a32012-05-22 15:56:21 -050035 { XFS_IO_DELALLOC, "delalloc" }, \
36 { XFS_IO_UNWRITTEN, "unwritten" }, \
37 { XFS_IO_OVERWRITE, "overwrite" }
Christoph Hellwiga206c812010-12-10 08:42:20 +000038
39/*
Christoph Hellwigf6d6d4f2006-01-11 15:40:13 +110040 * xfs_ioend struct manages large extent writes for XFS.
41 * It can manage several multi-page bio's at once.
42 */
Christoph Hellwig65b3da32005-09-05 08:18:12 +100043typedef struct xfs_ioend {
Christoph Hellwigf6d6d4f2006-01-11 15:40:13 +110044 struct xfs_ioend *io_list; /* next ioend in chain */
45 unsigned int io_type; /* delalloc / unwritten */
Nathan Scott7d04a332006-06-09 14:58:38 +100046 int io_error; /* I/O error code */
Christoph Hellwig65b3da32005-09-05 08:18:12 +100047 atomic_t io_remaining; /* hold count */
Christoph Hellwig281627d2012-03-13 08:41:05 +000048 unsigned int io_isdirect : 1;/* direct I/O */
Christoph Hellwigb677c212007-08-29 11:46:28 +100049 struct inode *io_inode; /* file being written to */
Christoph Hellwigc1a073b2005-09-05 08:23:35 +100050 struct buffer_head *io_buffer_head;/* buffer linked list head */
Christoph Hellwigf6d6d4f2006-01-11 15:40:13 +110051 struct buffer_head *io_buffer_tail;/* buffer linked list tail */
Christoph Hellwig65b3da32005-09-05 08:18:12 +100052 size_t io_size; /* size of the extent */
53 xfs_off_t io_offset; /* offset in the file */
54 struct work_struct io_work; /* xfsdatad work queue */
Christoph Hellwig281627d2012-03-13 08:41:05 +000055 struct xfs_trans *io_append_trans;/* xact. for size update */
Christoph Hellwig65b3da32005-09-05 08:18:12 +100056} xfs_ioend_t;
57
Christoph Hellwigf5e54d62006-06-28 04:26:44 -070058extern const struct address_space_operations xfs_address_space_operations;
Nathan Scottc2536662006-03-29 10:44:40 +100059extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
Christoph Hellwigf6d6d4f2006-01-11 15:40:13 +110060
Christoph Hellwig20cb52e2010-06-24 09:46:01 +100061extern void xfs_count_page_state(struct page *, int *, int *);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000062
Nathan Scottad723872006-06-09 15:29:12 +100063#endif /* __XFS_AOPS_H__ */