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117 lines
3.8 KiB
117 lines
3.8 KiB
20 years ago
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/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_LRW_H__
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#define __XFS_LRW_H__
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struct vnode;
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struct bhv_desc;
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struct xfs_mount;
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struct xfs_iocore;
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struct xfs_inode;
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struct xfs_bmbt_irec;
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struct xfs_buf;
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struct xfs_iomap;
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#if defined(XFS_RW_TRACE)
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/*
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* Defines for the trace mechanisms in xfs_lrw.c.
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*/
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#define XFS_RW_KTRACE_SIZE 128
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#define XFS_READ_ENTER 1
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#define XFS_WRITE_ENTER 2
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#define XFS_IOMAP_READ_ENTER 3
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#define XFS_IOMAP_WRITE_ENTER 4
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#define XFS_IOMAP_READ_MAP 5
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#define XFS_IOMAP_WRITE_MAP 6
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#define XFS_IOMAP_WRITE_NOSPACE 7
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#define XFS_ITRUNC_START 8
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#define XFS_ITRUNC_FINISH1 9
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#define XFS_ITRUNC_FINISH2 10
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#define XFS_CTRUNC1 11
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#define XFS_CTRUNC2 12
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#define XFS_CTRUNC3 13
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#define XFS_CTRUNC4 14
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#define XFS_CTRUNC5 15
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#define XFS_CTRUNC6 16
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#define XFS_BUNMAPI 17
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#define XFS_INVAL_CACHED 18
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#define XFS_DIORD_ENTER 19
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#define XFS_DIOWR_ENTER 20
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#define XFS_SENDFILE_ENTER 21
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#define XFS_WRITEPAGE_ENTER 22
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#define XFS_RELEASEPAGE_ENTER 23
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#define XFS_IOMAP_ALLOC_ENTER 24
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#define XFS_IOMAP_ALLOC_MAP 25
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#define XFS_IOMAP_UNWRITTEN 26
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extern void xfs_rw_enter_trace(int, struct xfs_iocore *,
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void *, size_t, loff_t, int);
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extern void xfs_inval_cached_trace(struct xfs_iocore *,
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xfs_off_t, xfs_off_t, xfs_off_t, xfs_off_t);
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#else
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#define xfs_rw_enter_trace(tag, io, data, size, offset, ioflags)
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#define xfs_inval_cached_trace(io, offset, len, first, last)
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#endif
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/*
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* Maximum count of bmaps used by read and write paths.
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*/
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#define XFS_MAX_RW_NBMAPS 4
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extern int xfs_bmap(struct bhv_desc *, xfs_off_t, ssize_t, int,
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struct xfs_iomap *, int *);
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extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
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extern int xfs_bdstrat_cb(struct xfs_buf *);
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extern int xfs_zero_eof(struct vnode *, struct xfs_iocore *, xfs_off_t,
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xfs_fsize_t, xfs_fsize_t);
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extern void xfs_inval_cached_pages(struct vnode *, struct xfs_iocore *,
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xfs_off_t, int, int);
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extern ssize_t xfs_read(struct bhv_desc *, struct kiocb *,
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const struct iovec *, unsigned int,
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loff_t *, int, struct cred *);
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extern ssize_t xfs_write(struct bhv_desc *, struct kiocb *,
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const struct iovec *, unsigned int,
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loff_t *, int, struct cred *);
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extern ssize_t xfs_sendfile(struct bhv_desc *, struct file *,
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loff_t *, int, size_t, read_actor_t,
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void *, struct cred *);
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extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
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#define XFS_FSB_TO_DB_IO(io,fsb) \
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(((io)->io_flags & XFS_IOCORE_RT) ? \
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XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
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XFS_FSB_TO_DADDR((io)->io_mount, (fsb)))
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#endif /* __XFS_LRW_H__ */
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