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/*
* Copyright (c) 2000 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_BUF_H__
#define __XFS_BUF_H__
/* These are just for xfs_syncsub... it sets an internal variable
* then passes it to VOP_FLUSH_PAGES or adds the flags to a newly gotten buf_t
*/
#define XFS_B_ASYNC PBF_ASYNC
#define XFS_B_DELWRI PBF_DELWRI
#define XFS_B_READ PBF_READ
#define XFS_B_WRITE PBF_WRITE
#define XFS_B_STALE PBF_STALE
#define XFS_BUF_TRYLOCK PBF_TRYLOCK
#define XFS_INCORE_TRYLOCK PBF_TRYLOCK
#define XFS_BUF_LOCK PBF_LOCK
#define XFS_BUF_MAPPED PBF_MAPPED
#define BUF_BUSY PBF_DONT_BLOCK
#define XFS_BUF_BFLAGS(x) ((x)->pb_flags) /* debugging routines might need this */
#define XFS_BUF_ZEROFLAGS(x) \
((x)->pb_flags &= ~(PBF_READ|PBF_WRITE|PBF_ASYNC|PBF_SYNC|PBF_DELWRI))
#define XFS_BUF_STALE(x) ((x)->pb_flags |= XFS_B_STALE)
#define XFS_BUF_UNSTALE(x) ((x)->pb_flags &= ~XFS_B_STALE)
#define XFS_BUF_ISSTALE(x) ((x)->pb_flags & XFS_B_STALE)
#define XFS_BUF_SUPER_STALE(x) (x)->pb_flags |= XFS_B_STALE;\
xfs_buf_undelay(x);\
(x)->pb_flags &= ~(PBF_PARTIAL|PBF_NONE)
static inline void xfs_buf_undelay(page_buf_t *pb)
{
if (pb->pb_list.next != &pb->pb_list) {
pagebuf_delwri_dequeue(pb);
pagebuf_rele(pb);
} else {
pb->pb_flags &= ~PBF_DELWRI;
}
}
#define XFS_BUF_DELAYWRITE(x) ((x)->pb_flags |= PBF_DELWRI)
#define XFS_BUF_UNDELAYWRITE(x) xfs_buf_undelay(x)
#define XFS_BUF_ISDELAYWRITE(x) ((x)->pb_flags & PBF_DELWRI)
#define XFS_BUF_ERROR(x,no) pagebuf_ioerror(x,no)
#define XFS_BUF_GETERROR(x) pagebuf_geterror(x)
#define XFS_BUF_ISERROR(x) (pagebuf_geterror(x)?1:0)
#define XFS_BUF_DONE(x) ((x)->pb_flags &= ~(PBF_PARTIAL|PBF_NONE))
#define XFS_BUF_UNDONE(x) ((x)->pb_flags |= PBF_PARTIAL|PBF_NONE)
#define XFS_BUF_ISDONE(x) (!(PBF_NOT_DONE(x)))
#define XFS_BUF_BUSY(x) ((x)->pb_flags |= PBF_FORCEIO)
#define XFS_BUF_UNBUSY(x) ((x)->pb_flags &= ~PBF_FORCEIO)
#define XFS_BUF_ISBUSY(x) (1)
#define XFS_BUF_ASYNC(x) ((x)->pb_flags |= PBF_ASYNC)
#define XFS_BUF_UNASYNC(x) ((x)->pb_flags &= ~PBF_ASYNC)
#define XFS_BUF_ISASYNC(x) ((x)->pb_flags & PBF_ASYNC)
#define XFS_BUF_SHUT(x) printk("XFS_BUF_SHUT not implemented yet\n")
#define XFS_BUF_UNSHUT(x) printk("XFS_BUF_UNSHUT not implemented yet\n")
#define XFS_BUF_ISSHUT(x) (0)
#define XFS_BUF_HOLD(x) pagebuf_hold(x)
#define XFS_BUF_READ(x) ((x)->pb_flags |= PBF_READ)
#define XFS_BUF_UNREAD(x) ((x)->pb_flags &= ~PBF_READ)
#define XFS_BUF_ISREAD(x) ((x)->pb_flags & PBF_READ)
#define XFS_BUF_WRITE(x) ((x)->pb_flags |= PBF_WRITE)
#define XFS_BUF_UNWRITE(x) ((x)->pb_flags &= ~PBF_WRITE)
#define XFS_BUF_ISWRITE(x) ((x)->pb_flags & PBF_WRITE)
#define XFS_BUF_ISUNINITIAL(x) ((x)->pb_flags & PBF_UNINITIAL)
#define XFS_BUF_UNUNINITIAL(x) ((x)->pb_flags &= ~PBF_UNINITIAL)
#define XFS_BUF_BP_ISMAPPED(bp) 1
#define XFS_BUF_IS_GRIO(bp) ((bp)->pb_flags & PBF_GRIO)
typedef struct page_buf_s xfs_buf_t;
#define xfs_buf page_buf_s
typedef struct buftarg {
struct pb_target *pb_targ;
struct block_device *bd_targ;
dev_t dev;
} buftarg_t;
#define XFS_BUF_IODONE_FUNC(buf) (buf)->pb_iodone
#define XFS_BUF_SET_IODONE_FUNC(buf, func) \
(buf)->pb_iodone = (func)
#define XFS_BUF_CLR_IODONE_FUNC(buf) \
(buf)->pb_iodone = NULL
#define XFS_BUF_SET_BDSTRAT_FUNC(buf, func) \
(buf)->pb_strat = (func)
#define XFS_BUF_CLR_BDSTRAT_FUNC(buf) \
(buf)->pb_strat = NULL
#define XFS_BUF_FSPRIVATE(buf, type) \
((type)(buf)->pb_fspriv)
#define XFS_BUF_SET_FSPRIVATE(buf, value) \
(buf)->pb_fspriv = (void *)(value)
#define XFS_BUF_FSPRIVATE2(buf, type) \
((type)(buf)->pb_fspriv2)
#define XFS_BUF_SET_FSPRIVATE2(buf, value) \
(buf)->pb_fspriv2 = (void *)(value)
#define XFS_BUF_FSPRIVATE3(buf, type) \
((type)(buf)->pb_fspriv3)
#define XFS_BUF_SET_FSPRIVATE3(buf, value) \
(buf)->pb_fspriv3 = (void *)(value)
#define XFS_BUF_SET_START(buf)
#define XFS_BUF_SET_BRELSE_FUNC(buf, value) \
(buf)->pb_relse = (value)
#define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->pb_addr)
extern inline xfs_caddr_t xfs_buf_offset(page_buf_t *bp, off_t offset)
{
if (bp->pb_flags & PBF_MAPPED)
return XFS_BUF_PTR(bp) + offset;
return (xfs_caddr_t) pagebuf_offset(bp, offset);
}
#define XFS_BUF_SET_PTR(bp, val, count) \
pagebuf_associate_memory(bp, val, count)
#define XFS_BUF_ADDR(bp) ((bp)->pb_bn)
#define XFS_BUF_OFFSET(bp) ((bp)->pb_file_offset >> 9)
#define XFS_BUF_SET_ADDR(bp, blk) \
((bp)->pb_bn = (page_buf_daddr_t)(blk))
#define XFS_BUF_COUNT(bp) ((bp)->pb_count_desired)
#define XFS_BUF_SET_COUNT(bp, cnt) \
((bp)->pb_count_desired = cnt)
#define XFS_BUF_SIZE(bp) ((bp)->pb_buffer_length)
#define XFS_BUF_SET_SIZE(bp, cnt) \
((bp)->pb_buffer_length = cnt)
#define XFS_BUF_SET_VTYPE_REF(bp, type, ref)
#define XFS_BUF_SET_VTYPE(bp, type)
#define XFS_BUF_SET_REF(bp, ref)
#define XFS_BUF_ISPINNED(bp) pagebuf_ispin(bp)
#define XFS_BUF_VALUSEMA(bp) pagebuf_lock_value(bp)
#define XFS_BUF_CPSEMA(bp) (pagebuf_cond_lock(bp) == 0)
#define XFS_BUF_VSEMA(bp) pagebuf_unlock(bp)
#define XFS_BUF_PSEMA(bp,x) pagebuf_lock(bp)
#define XFS_BUF_V_IODONESEMA(bp) up(&PBP(bp)->pb_iodonesema);
/* setup the buffer target from a buftarg structure */
#define XFS_BUF_SET_TARGET(bp, target) \
(bp)->pb_dev = (target)->dev
#define XFS_BUF_TARGET(bp) ((bp)->pb_dev)
#define XFS_BUF_SET_VTYPE_REF(bp, type, ref)
#define XFS_BUF_SET_VTYPE(bp, type)
#define XFS_BUF_SET_REF(bp, ref)
#define xfs_buf_read(target, blkno, len, flags) \
pagebuf_get((target)->pb_targ, (blkno), (len), \
PBF_LOCK | PBF_READ | PBF_MAPPED | PBF_MAPPABLE)
#define xfs_buf_get(target, blkno, len, flags) \
pagebuf_get((target)->pb_targ, (blkno), (len), \
PBF_LOCK | PBF_MAPPED | PBF_MAPPABLE)
#define xfs_buf_read_flags(target, blkno, len, flags) \
pagebuf_get((target)->pb_targ, (blkno), (len), \
PBF_READ | PBF_MAPPABLE | flags)
#define xfs_buf_get_flags(target, blkno, len, flags) \
pagebuf_get((target)->pb_targ, (blkno), (len), \
PBF_MAPPABLE | flags)
static inline int xfs_bawrite(void *mp, page_buf_t *bp)
{
extern int xfs_bdstrat_cb(struct xfs_buf *);
int ret;
bp->pb_fspriv3 = mp;
bp->pb_strat = xfs_bdstrat_cb;
xfs_buf_undelay(bp);
if ((ret = pagebuf_iostart(bp, PBF_WRITE | PBF_ASYNC)) == 0)
run_task_queue(&tq_disk);
return ret;
}
static inline void xfs_buf_relse(page_buf_t *bp)
{
if ((bp->pb_flags & _PBF_LOCKABLE) && !bp->pb_relse)
pagebuf_unlock(bp);
pagebuf_rele(bp);
}
#define xfs_bpin(bp) pagebuf_pin(bp)
#define xfs_bunpin(bp) pagebuf_unpin(bp)
#ifdef PAGEBUF_TRACE
#define PB_DEFINE_TRACES
#include <pagebuf/page_buf_trace.h>
#define xfs_buftrace(id, bp) PB_TRACE(bp, (void *)id)
#else
#define xfs_buftrace(id, bp)
#endif
#define xfs_biodone(pb) \
pagebuf_iodone(pb)
#define xfs_incore(buftarg,blkno,len,lockit) \
pagebuf_find(buftarg.pb_targ, blkno ,len, lockit)
#define xfs_biomove(pb, off, len, data, rw) \
pagebuf_iomove((pb), (off), (len), (data), \
((rw) == XFS_B_WRITE) ? PBRW_WRITE : PBRW_READ)
#define xfs_biozero(pb, off, len) \
pagebuf_iomove((pb), (off), (len), NULL, PBRW_ZERO)
static inline int XFS_bwrite(page_buf_t *pb)
{
int sync = (pb->pb_flags & PBF_ASYNC) == 0;
int error;
pb->pb_flags |= PBF_SYNC;
xfs_buf_undelay(pb);
__pagebuf_iorequest(pb);
if (sync) {
error = pagebuf_iowait(pb);
xfs_buf_relse(pb);
} else {
run_task_queue(&tq_disk);
error = 0;
}
return error;
}
#define XFS_bdwrite(pb) \
pagebuf_iostart(pb, PBF_DELWRI | PBF_ASYNC)
static inline int xfs_bdwrite(void *mp, page_buf_t *bp)
{
extern int xfs_bdstrat_cb(struct xfs_buf *);
bp->pb_strat = xfs_bdstrat_cb;
bp->pb_fspriv3 = mp;
return pagebuf_iostart(bp, PBF_DELWRI | PBF_ASYNC);
}
#define XFS_bdstrat(bp) pagebuf_iorequest(bp)
#define xfs_iowait(pb) \
pagebuf_iowait(pb)
/*
* Go through all incore buffers, and release buffers
* if they belong to the given device. This is used in
* filesystem error handling to preserve the consistency
* of its metadata.
*/
extern void XFS_bflush(buftarg_t);
#define xfs_binval(buftarg) XFS_bflush(buftarg)
#define xfs_incore_relse(buftarg,delwri_only,wait) \
pagebuf_target_clear((buftarg)->pb_targ)
#define xfs_baread(target, rablkno, ralen) \
pagebuf_readahead((target)->pb_targ, (rablkno), \
(ralen), PBF_DONT_BLOCK)
#define XFS_getrbuf(sleep,mp) \
pagebuf_get_empty((mp)->m_ddev_targ.pb_targ)
#define XFS_ngetrbuf(len,mp) \
pagebuf_get_no_daddr(len,(mp)->m_ddev_targ.pb_targ)
#define XFS_freerbuf(bp) pagebuf_free(bp)
#define XFS_nfreerbuf(bp) pagebuf_free(bp)
#endif
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