/* * 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_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) #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) do { \ XFS_BUF_STALE(x); \ xfs_buf_undelay(x); \ XFS_BUF_DONE(x); \ } while (0) #define XFS_BUF_MANAGE PBF_FS_MANAGED #define XFS_BUF_UNMANAGE(x) ((x)->pb_flags &= ~PBF_FS_MANAGED) static inline void xfs_buf_undelay(page_buf_t *pb) { if (pb->pb_flags & PBF_DELWRI) { 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_FLUSH(x) ((x)->pb_flags |= PBF_FLUSH) #define XFS_BUF_UNFLUSH(x) ((x)->pb_flags &= ~PBF_FLUSH) #define XFS_BUF_ISFLUSH(x) ((x)->pb_flags & PBF_FLUSH) #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) (0) #define XFS_BUF_UNUNINITIAL(x) (0) #define XFS_BUF_BP_ISMAPPED(bp) 1 typedef struct page_buf_s xfs_buf_t; #define xfs_buf page_buf_s typedef struct pb_target xfs_buftarg_t; #define xfs_buftarg pb_target #define XFS_BUF_DATAIO(x) ((x)->pb_flags |= PBF_FS_DATAIOD) #define XFS_BUF_UNDATAIO(x) ((x)->pb_flags &= ~PBF_FS_DATAIOD) #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, size_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_SET_ADDR(bp, blk) \ ((bp)->pb_bn = (page_buf_daddr_t)(blk)) #define XFS_BUF_OFFSET(bp) ((bp)->pb_file_offset) #define XFS_BUF_SET_OFFSET(bp, off) \ ((bp)->pb_file_offset = (off)) #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(&bp->pb_iodonesema); /* setup the buffer target from a buftarg structure */ #define XFS_BUF_SET_TARGET(bp, target) \ (bp)->pb_target = (target) #define XFS_BUF_TARGET(bp) ((bp)->pb_target) #define XFS_BUFTARG_NAME(target) \ ({ char __b[BDEVNAME_SIZE]; bdevname((target->pbr_bdev), __b); __b; }) #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), (blkno), (len), \ PBF_LOCK | PBF_READ | PBF_MAPPED | PBF_MAPPABLE) #define xfs_buf_get(target, blkno, len, flags) \ pagebuf_get((target), (blkno), (len), \ PBF_LOCK | PBF_MAPPED | PBF_MAPPABLE) #define xfs_buf_read_flags(target, blkno, len, flags) \ pagebuf_get((target), (blkno), (len), \ PBF_READ | PBF_MAPPABLE | flags) #define xfs_buf_get_flags(target, blkno, len, flags) \ pagebuf_get((target), (blkno), (len), \ PBF_MAPPABLE | flags) static inline int xfs_bawrite(void *mp, page_buf_t *bp) { bp->pb_fspriv3 = mp; bp->pb_strat = xfs_bdstrat_cb; xfs_buf_undelay(bp); return pagebuf_iostart(bp, PBF_WRITE | PBF_ASYNC | PBF_RUN_QUEUES); } 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, PB_TRACE_REC(external), (void *)id) #else # define xfs_buftrace(id, bp) do { } while (0) #endif #define xfs_biodone(pb) \ pagebuf_iodone(pb, (pb->pb_flags & PBF_FS_DATAIOD), 0) #define xfs_incore(buftarg,blkno,len,lockit) \ pagebuf_find(buftarg, 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 iowait = (pb->pb_flags & PBF_ASYNC) == 0; int error = 0; pb->pb_flags |= PBF_SYNC; if (!iowait) pb->pb_flags |= PBF_RUN_QUEUES; xfs_buf_undelay(pb); pagebuf_iostrategy(pb); if (iowait) { error = pagebuf_iowait(pb); xfs_buf_relse(pb); } return error; } #define XFS_bdwrite(pb) \ pagebuf_iostart(pb, PBF_DELWRI | PBF_ASYNC) static inline int xfs_bdwrite(void *mp, page_buf_t *bp) { 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. */ #define xfs_binval(buftarg) xfs_flush_buftarg(buftarg) #define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg) #define xfs_incore_relse(buftarg,delwri_only,wait) \ xfs_relse_buftarg(buftarg) #define xfs_baread(target, rablkno, ralen) \ pagebuf_readahead((target), (rablkno), (ralen), PBF_DONT_BLOCK) #define xfs_buf_get_empty(len, target) pagebuf_get_empty((len), (target)) #define xfs_buf_get_noaddr(len, target) pagebuf_get_no_daddr((len), (target)) #define xfs_buf_free(bp) pagebuf_free(bp) #endif /* __XFS_BUF_H__ */