112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2 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.
|
|
*
|
|
* Further, this software is distributed without any warranty that it is
|
|
* free of the rightful claim of any third person regarding infringement
|
|
* or the like. Any license provided herein, whether implied or
|
|
* otherwise, applies only to this software file. Patent licenses, if
|
|
* any, provided herein do not apply to combinations of this program with
|
|
* other software, or any other product whatsoever.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write the Free Software Foundation, Inc., 59
|
|
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
|
*
|
|
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
|
|
* Mountain View, CA 94043, or:
|
|
*
|
|
* http://www.sgi.com
|
|
*
|
|
* For further information regarding this notice, see:
|
|
*
|
|
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
|
|
*/
|
|
#ifndef __XFS_RW_H__
|
|
#define __XFS_RW_H__
|
|
|
|
struct xfs_buf;
|
|
struct xfs_inode;
|
|
struct xfs_mount;
|
|
|
|
/*
|
|
* Maximum count of bmaps used by read and write paths.
|
|
*/
|
|
#define XFS_MAX_RW_NBMAPS 4
|
|
|
|
/*
|
|
* Counts of readahead buffers to use based on physical memory size.
|
|
* None of these should be more than XFS_MAX_RW_NBMAPS.
|
|
*/
|
|
#define XFS_RW_NREADAHEAD_16MB 2
|
|
#define XFS_RW_NREADAHEAD_32MB 3
|
|
#define XFS_RW_NREADAHEAD_K32 4
|
|
#define XFS_RW_NREADAHEAD_K64 4
|
|
|
|
/*
|
|
* Maximum size of a buffer that we\'ll map. Making this
|
|
* too big will degrade performance due to the number of
|
|
* pages which need to be gathered. Making it too small
|
|
* will prevent us from doing large I/O\'s to hardware that
|
|
* needs it.
|
|
*
|
|
* This is currently set to 512 KB.
|
|
*/
|
|
#define XFS_MAX_BMAP_LEN_BB 1024
|
|
#define XFS_MAX_BMAP_LEN_BYTES 524288
|
|
|
|
/*
|
|
* Convert the given file system block to a disk block.
|
|
* We have to treat it differently based on whether the
|
|
* file is a real time file or not, because the bmap code
|
|
* does.
|
|
*/
|
|
#define XFS_FSB_TO_DB(ip,fsb) xfs_fsb_to_db(ip,fsb)
|
|
static inline xfs_daddr_t
|
|
xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
|
|
{
|
|
return (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \
|
|
(xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
|
|
XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
|
|
}
|
|
#define XFS_FSB_TO_DB_IO(io,fsb) xfs_fsb_to_db_io(io,fsb)
|
|
static inline xfs_daddr_t
|
|
xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb)
|
|
{
|
|
return (((io)->io_flags & XFS_IOCORE_RT) ? \
|
|
XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
|
|
XFS_FSB_TO_DADDR((io)->io_mount, (fsb)));
|
|
}
|
|
|
|
/*
|
|
* Prototypes for functions in xfs_rw.c.
|
|
*/
|
|
extern int xfs_write_clear_setuid(struct xfs_inode *ip);
|
|
extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
|
|
extern int xfs_bioerror(struct xfs_buf *bp);
|
|
extern int xfs_bioerror_relse(struct xfs_buf *bp);
|
|
extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
|
|
xfs_daddr_t blkno, int len, uint flags,
|
|
struct xfs_buf **bpp);
|
|
extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
|
|
xfs_buf_t *bp, xfs_daddr_t blkno);
|
|
|
|
/*
|
|
* Prototypes for functions in xfs_vnodeops.c.
|
|
*/
|
|
extern int xfs_rwlock(bhv_desc_t *bdp, vrwlock_t write_lock);
|
|
extern void xfs_rwunlock(bhv_desc_t *bdp, vrwlock_t write_lock);
|
|
extern int xfs_change_file_space(bhv_desc_t *bdp, int cmd, xfs_flock64_t *bf,
|
|
xfs_off_t offset, cred_t *credp, int flags);
|
|
extern int xfs_set_dmattrs(bhv_desc_t *bdp, u_int evmask, u_int16_t state,
|
|
cred_t *credp);
|
|
|
|
#endif /* __XFS_RW_H__ */
|