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/*
* Copyright (c) 2000-2003,2005 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_LRW_H__
#define __XFS_LRW_H__
struct vnode;
struct bhv_desc;
struct xfs_mount;
struct xfs_iocore;
struct xfs_inode;
struct xfs_bmbt_irec;
struct xfs_buf;
struct xfs_iomap;
#if defined(XFS_RW_TRACE)
/*
* Defines for the trace mechanisms in xfs_lrw.c.
*/
#define XFS_RW_KTRACE_SIZE 128
#define XFS_READ_ENTER 1
#define XFS_WRITE_ENTER 2
#define XFS_IOMAP_READ_ENTER 3
#define XFS_IOMAP_WRITE_ENTER 4
#define XFS_IOMAP_READ_MAP 5
#define XFS_IOMAP_WRITE_MAP 6
#define XFS_IOMAP_WRITE_NOSPACE 7
#define XFS_ITRUNC_START 8
#define XFS_ITRUNC_FINISH1 9
#define XFS_ITRUNC_FINISH2 10
#define XFS_CTRUNC1 11
#define XFS_CTRUNC2 12
#define XFS_CTRUNC3 13
#define XFS_CTRUNC4 14
#define XFS_CTRUNC5 15
#define XFS_CTRUNC6 16
#define XFS_BUNMAPI 17
#define XFS_INVAL_CACHED 18
#define XFS_DIORD_ENTER 19
#define XFS_DIOWR_ENTER 20
#define XFS_SENDFILE_ENTER 21
#define XFS_WRITEPAGE_ENTER 22
#define XFS_RELEASEPAGE_ENTER 23
#define XFS_INVALIDPAGE_ENTER 24
#define XFS_IOMAP_ALLOC_ENTER 25
#define XFS_IOMAP_ALLOC_MAP 26
#define XFS_IOMAP_UNWRITTEN 27
#define XFS_SPLICE_READ_ENTER 28
#define XFS_SPLICE_WRITE_ENTER 29
extern void xfs_rw_enter_trace(int, struct xfs_iocore *,
void *, size_t, loff_t, int);
extern void xfs_inval_cached_trace(struct xfs_iocore *,
xfs_off_t, xfs_off_t, xfs_off_t, xfs_off_t);
#else
#define xfs_rw_enter_trace(tag, io, data, size, offset, ioflags)
#define xfs_inval_cached_trace(io, offset, len, first, last)
#endif
/*
* Maximum count of bmaps used by read and write paths.
*/
#define XFS_MAX_RW_NBMAPS 4
extern int xfs_bmap(struct bhv_desc *, xfs_off_t, ssize_t, int,
struct xfs_iomap *, int *);
extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
extern int xfs_bdstrat_cb(struct xfs_buf *);
extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
extern int xfs_zero_eof(struct vnode *, struct xfs_iocore *, xfs_off_t,
xfs_fsize_t, xfs_fsize_t);
extern ssize_t xfs_read(struct bhv_desc *, struct kiocb *,
const struct iovec *, unsigned int,
loff_t *, int, struct cred *);
extern ssize_t xfs_write(struct bhv_desc *, struct kiocb *,
const struct iovec *, unsigned int,
loff_t *, int, struct cred *);
extern ssize_t xfs_sendfile(struct bhv_desc *, struct file *,
loff_t *, int, size_t, read_actor_t,
void *, struct cred *);
extern ssize_t xfs_splice_read(struct bhv_desc *, struct file *,
struct inode *, size_t, int, int,
struct cred *);
extern ssize_t xfs_splice_write(struct bhv_desc *, struct inode *,
struct file *, size_t, int, int,
struct cred *);
#endif /* __XFS_LRW_H__ */
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