Current Path : /usr/src/sys/gnu/fs/xfs/FreeBSD/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //usr/src/sys/gnu/fs/xfs/FreeBSD/xfs_buf.h |
/* * 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__ #include <sys/bio.h> #include <sys/buf.h> struct xfs_buf; struct xfs_mount; struct vnode; typedef struct buf xfs_buf_t; typedef uint32_t xfs_buf_flags_t; #define xfs_buf buf extern struct buf_ops xfs_bo_ops; typedef enum { XBRW_READ = 1, /* transfer into target memory */ XBRW_WRITE = 2, /* transfer from target memory */ XBRW_ZERO = 3, /* Zero target memory */ } xfs_buf_rw_t; /* Buffer Read and Write Routines */ extern void xfs_buf_ioend(xfs_buf_t *, int); extern void xfs_buf_ioerror(xfs_buf_t *, int); extern int xfs_buf_iostart(xfs_buf_t *, xfs_buf_flags_t); extern int xfs_buf_iorequest(xfs_buf_t *); extern int xfs_buf_iowait(xfs_buf_t *); extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, xfs_caddr_t, xfs_buf_rw_t); /* Pinning Buffer Storage in Memory */ extern void xfs_buf_pin(xfs_buf_t *); extern void xfs_buf_unpin(xfs_buf_t *); extern int xfs_buf_ispin(xfs_buf_t *); typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); /* call-back function on I/O completion */ typedef void (*xfs_buf_relse_t)(struct xfs_buf *); /* call-back function on I/O completion */ typedef int (*xfs_buf_bdstrat_t)(struct xfs_buf *); typedef struct xfs_buftarg { /* this probaby redundant info, but stick with linux conventions for now */ unsigned int bt_bsize; unsigned int bt_sshift; size_t bt_smask; struct cdev *dev; struct vnode *specvp; } xfs_buftarg_t; /* Finding and Reading Buffers */ extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t, xfs_buf_flags_t); /* Misc buffer rountines */ extern int xfs_readonly_buftarg(xfs_buftarg_t *); /* 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 XBF_DONT_BLOCK 0 #define XFS_B_ASYNC B_ASYNC #define XFS_B_DELWRI B_DELWRI #define XFS_B_READ BIO_READ #define XFS_B_WRITE BIO_WRITE #define XFS_B_STALE B_INVAL #define XFS_BUF_LOCK 0 #define XFS_BUF_TRYLOCK 0 #define XFS_BUF_MAPPED 0 #define BUF_BUSY 0 #define XBF_ORDERED 0 /* debugging routines might need this */ #define XFS_BUF_BFLAGS(x) ((x)->b_flags) #define XFS_BUF_ZEROFLAGS(x) ((x)->b_flags = 0) #define XFS_BUF_STALE(x) ((x)->b_flags |= (XFS_B_STALE|B_NOCACHE)) #define XFS_BUF_UNSTALE(x) ((x)->b_flags &= ~(XFS_B_STALE|B_NOCACHE)) #define XFS_BUF_ISSTALE(x) ((x)->b_flags & (XFS_B_STALE|B_NOCACHE)) #define XFS_BUF_SUPER_STALE(x) {(x)->b_flags |= (XFS_B_STALE|B_NOCACHE); \ (x)->b_flags &= ~(XFS_B_DELWRI|B_CACHE);} #define XFS_BUF_MANAGE B_MANAGED #define XFS_BUF_UNMANAGE(x) ((x)->b_flags &= ~B_MANAGED) #define XFS_BUF_DELAYWRITE(x) ((x)->b_flags |= XFS_B_DELWRI) #define XFS_BUF_UNDELAYWRITE(x) ((x)->b_flags &= ~XFS_B_DELWRI) #define XFS_BUF_ISDELAYWRITE(x) ((x)->b_flags & XFS_B_DELWRI) #define XFS_BUF_ERROR(x,no) xfs_buf_set_error((x), (no)) #define XFS_BUF_GETERROR(x) xfs_buf_get_error(x) #define XFS_BUF_ISERROR(x) (((x)->b_ioflags & BIO_ERROR) != 0) void static __inline__ xfs_buf_set_error(struct buf *bp, int err) { bp->b_ioflags |= BIO_ERROR; bp->b_error = err; } int static __inline__ xfs_buf_get_error(struct buf *bp) { return XFS_BUF_ISERROR(bp) ? (bp->b_error ? bp->b_error : EIO) : 0; } #define XFS_BUF_DONE(x) ((x)->b_flags |= B_CACHE) #define XFS_BUF_UNDONE(x) ((x)->b_flags &= ~B_CACHE) #define XFS_BUF_ISDONE(x) ((x)->b_flags & B_CACHE) #define XFS_BUF_BUSY(x) ((x)->b_flags |= BUF_BUSY) #define XFS_BUF_UNBUSY(x) ((x)->b_flags &= ~BUF_BUSY) #define XFS_BUF_ISBUSY(x) (1) #define XFS_BUF_ASYNC(x) ((x)->b_flags |= B_ASYNC) #define XFS_BUF_UNASYNC(x) ((x)->b_flags &= ~B_ASYNC) #define XFS_BUF_ISASYNC(x) ((x)->b_flags & B_ASYNC) #define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED) #define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED) #define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED) #define XFS_BUF_FLUSH(x) ((x)->b_flags |= B_00800000) #define XFS_BUF_UNFLUSH(x) ((x)->b_flags &= ~B_00800000) #define XFS_BUF_ISFLUSH(x) ((x)->b_flags & B_00800000) #define XFS_BUF_SHUT(x) printf("XFS_BUF_SHUT not implemented yet\n") #define XFS_BUF_UNSHUT(x) printf("XFS_BUF_UNSHUT not implemented yet\n") #define XFS_BUF_ISSHUT(x) (0) #define XFS_BUF_HOLD(x) ((void)0) #define XFS_BUF_UNHOLD(x) ((void)0) #define XFS_BUF_READ(x) ((x)->b_iocmd = BIO_READ) #define XFS_BUF_UNREAD(x) ((x)->b_iocmd = 0) #define XFS_BUF_ISREAD(x) ((x)->b_iocmd == BIO_READ) #define XFS_BUF_WRITE(x) ((x)->b_iocmd = BIO_WRITE) #define XFS_BUF_UNWRITE(x) ((x)->b_iocmd = 0) #define XFS_BUF_ISWRITE(x) ((x)->b_iocmd == BIO_WRITE) #define XFS_BUF_ISUNINITIAL(x) (0) #define XFS_BUF_UNUNINITIAL(x) (0) #define XFS_BUF_IODONE_FUNC(x) (x)->b_iodone #define XFS_BUF_SET_IODONE_FUNC(x, f) (x)->b_iodone = (f) #define XFS_BUF_CLR_IODONE_FUNC(x) (x)->b_iodone = NULL #define XFS_BUF_SET_BDSTRAT_FUNC(x, f) do { if(f != NULL) {} } while(0) #define XFS_BUF_CLR_BDSTRAT_FUNC(x) ((void)0) #define XFS_BUF_BP_ISMAPPED(bp) (1) #define XFS_BUF_FSPRIVATE(buf, type) \ ((type)(buf)->b_fsprivate1) #define XFS_BUF_SET_FSPRIVATE(buf, value) \ (buf)->b_fsprivate1 = (void *)(value) #define XFS_BUF_FSPRIVATE2(buf, type) \ ((type)(buf)->b_fsprivate2) #define XFS_BUF_SET_FSPRIVATE2(buf, value) \ (buf)->b_fsprivate2 = (void *)(value) #define XFS_BUF_FSPRIVATE3(buf, type) \ ((type)(buf)->b_fsprivate3) #define XFS_BUF_SET_FSPRIVATE3(buf, value) \ (buf)->b_fsprivate3 = (void *)(value) #define XFS_BUF_SET_START(buf) \ printf("XFS_BUF_SET_START: %s:%d\n", __FILE__, __LINE__) #define XFS_BUF_SET_BRELSE_FUNC(buf, value) \ do { \ printf("XFS_BUF_SET_BRELSE_FUNC: %s:%d\n", \ __FILE__, __LINE__); \ if (value != NULL ) {} \ } while(0) #define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_data) static __inline xfs_caddr_t xfs_buf_offset(xfs_buf_t *bp, size_t offset) { return XFS_BUF_PTR(bp) + offset; } #define XFS_BUF_SET_PTR(bp, val, count) \ do { \ (bp)->b_data = (val); \ (bp)->b_bcount = (count); \ } while(0) #define XFS_BUF_ADDR(bp) ((bp)->b_blkno) #define XFS_BUF_SET_ADDR(bp, blk) \ ((bp)->b_blkno = blk) #define XFS_BUF_OFFSET(bp) ((bp)->b_offset) #define XFS_BUF_SET_OFFSET(bp, off) \ ((bp)->b_offset = off) #define XFS_BUF_COUNT(bp) ((bp)->b_bcount) #define XFS_BUF_SET_COUNT(bp, cnt) \ ((bp)->b_bcount = cnt) #define XFS_BUF_SIZE(bp) ((bp)->b_bufsize) #define XFS_BUF_SET_SIZE(bp, cnt) \ ((bp)->b_bufsize = 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_VALUSEMA(bp) (BUF_ISLOCKED(bp) ? 0 : 1) #define XFS_BUF_CPSEMA(bp) \ (BUF_LOCK(bp, LK_EXCLUSIVE|LK_CANRECURSE | LK_SLEEPFAIL, NULL) == 0) #define XFS_BUF_PSEMA(bp,x) BUF_LOCK(bp, LK_EXCLUSIVE|LK_CANRECURSE, NULL) #define XFS_BUF_VSEMA(bp) BUF_UNLOCK(bp) #define XFS_BUF_V_IODONESEMA(bp) bdone(bp) /* setup the buffer target from a buftarg structure */ #define XFS_BUF_SET_TARGET(bp, target) \ xfs_buf_set_target(bp, target) void xfs_buf_set_target(xfs_buf_t *, xfs_buftarg_t *); xfs_buftarg_t *xfs_buf_get_target(xfs_buf_t *); /* return the dev_t being used */ #define XFS_BUF_TARGET(bp) xfs_buf_get_target(bp) #define XFS_BUFTARG_NAME(targp) devtoname((targp)->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_ISPINNED(bp) xfs_buf_ispin(bp) xfs_buf_t * xfs_buf_read_flags(xfs_buftarg_t *, xfs_daddr_t, size_t, int); #define xfs_buf_read(target, blkno, len, flags) \ xfs_buf_read_flags(target, blkno, len, \ XFS_BUF_LOCK | XFS_BUF_MAPPED) xfs_buf_t * xfs_buf_get_flags(xfs_buftarg_t *, xfs_daddr_t, size_t, int); #define xfs_buf_get(target, blkno, len, flags) \ xfs_buf_get_flags(target, blkno, len, \ XFS_BUF_LOCK | XFS_BUF_MAPPED) /* the return value is never used ... why does linux define this functions this way? */ static inline int xfs_bawrite(void *mp, xfs_buf_t *bp) { /* Ditto for xfs_bawrite bp->b_fspriv3 = mp; bp->b_strat = xfs_bdstrat_cb; xfs_buf_delwri_dequeue(bp); return xfs_buf_iostart(bp, XBF_WRITE | XBF_ASYNC | _XBF_RUN_QUEUES); */ bawrite(bp); return 0; } static inline int xfs_bdwrite(void *mp, xfs_buf_t *bp) { /* this is for io shutdown checking need to do this at some point RMC */ /* probably should just change xfs to call a buf write function */ #if 0 /* RMC */ bp->b_strat = xfs_bdstrat_cb; bp->b_fspriv3 = mp; return xfs_buf_iostart(bp, XBF_DELWRI | XBF_ASYNC); #endif bdwrite(bp); return 0; } #define xfs_bpin(bp) xfs_buf_pin(bp) #define xfs_bunpin(bp) xfs_buf_unpin(bp) #define xfs_buf_relse(bp) brelse(bp) #define xfs_bp_mapin(bp) bp_mapin(bp) #define xfs_xfsd_list_evict(x) _xfs_xfsd_list_evict(x) #define xfs_buftrace(x,y) CTR2(KTR_BUF, "%s bp %p flags %X", bp, bp->b_flags) #define xfs_biodone(bp) bufdone_finish(bp) #define xfs_incore(xfs_buftarg,blkno,len,lockit) \ incore(&xfs_buftarg->specvp->v_bufobj, blkno); #define xfs_biomove(bp, off, len, data, rw) \ xfs_buf_iomove((bp), (off), (len), (data), \ ((rw) == XFS_B_WRITE) ? XBRW_WRITE : XBRW_READ) #define xfs_biozero(bp, off, len) \ xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) /* already a function xfs_bwrite... fix this */ #define XFS_bdwrite(bp) bdwrite(bp) #define xfs_iowait(bp) bufwait(bp) #define XFS_bdstrat(bp) xfs_buf_iorequest(bp) #define xfs_baread(target, rablkno, ralen) \ xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK) struct xfs_mount; int XFS_bwrite(xfs_buf_t *bp); xfs_buf_t* xfs_buf_get_empty(size_t, xfs_buftarg_t *targ); xfs_buf_t* xfs_buf_get_noaddr(size_t, xfs_buftarg_t *targ); void xfs_buf_free(xfs_buf_t *); extern void xfs_bwait_unpin(xfs_buf_t *bp); extern xfs_buftarg_t *xfs_alloc_buftarg(struct vnode *, int); extern void xfs_free_buftarg(xfs_buftarg_t *, int); extern void xfs_wait_buftarg(xfs_buftarg_t *); extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int); extern unsigned int xfs_getsize_buftarg(struct xfs_buftarg *); extern int xfs_flush_buftarg(xfs_buftarg_t *, int); #define xfs_binval(buftarg) xfs_flush_buftarg(buftarg, 1) #define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg, 1) #endif