2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
41 typedef struct buf xfs_buf_t;
42 typedef uint32_t xfs_buf_flags_t;
45 extern struct buf_ops xfs_bo_ops;
48 XBRW_READ = 1, /* transfer into target memory */
49 XBRW_WRITE = 2, /* transfer from target memory */
50 XBRW_ZERO = 3, /* Zero target memory */
53 /* Buffer Read and Write Routines */
54 extern void xfs_buf_ioend(xfs_buf_t *, int);
55 extern void xfs_buf_ioerror(xfs_buf_t *, int);
56 extern int xfs_buf_iostart(xfs_buf_t *, xfs_buf_flags_t);
57 extern int xfs_buf_iorequest(xfs_buf_t *);
58 extern int xfs_buf_iowait(xfs_buf_t *);
59 extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, xfs_caddr_t, xfs_buf_rw_t);
61 /* Pinning Buffer Storage in Memory */
62 extern void xfs_buf_pin(xfs_buf_t *);
63 extern void xfs_buf_unpin(xfs_buf_t *);
64 extern int xfs_buf_ispin(xfs_buf_t *);
67 typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); /* call-back function on I/O completion */
68 typedef void (*xfs_buf_relse_t)(struct xfs_buf *); /* call-back function on I/O completion */
69 typedef int (*xfs_buf_bdstrat_t)(struct xfs_buf *);
71 typedef struct xfs_buftarg {
72 /* this probaby redundant info, but stick with linux conventions for now */
73 unsigned int bt_bsize;
74 unsigned int bt_sshift;
81 /* Finding and Reading Buffers */
82 extern void xfs_buf_readahead(xfs_buftarg_t *, xfs_off_t, size_t, xfs_buf_flags_t);
83 /* Misc buffer rountines */
84 extern int xfs_readonly_buftarg(xfs_buftarg_t *);
86 /* These are just for xfs_syncsub... it sets an internal variable
87 * then passes it to VOP_FLUSH_PAGES or adds the flags to a newly gotten buf_t
89 #define XBF_DONT_BLOCK 0
91 #define XFS_B_ASYNC B_ASYNC
92 #define XFS_B_DELWRI B_DELWRI
93 #define XFS_B_READ BIO_READ
94 #define XFS_B_WRITE BIO_WRITE
96 #define XFS_B_STALE B_INVAL
97 #define XFS_BUF_LOCK 0
98 #define XFS_BUF_TRYLOCK 0
99 #define XFS_BUF_MAPPED 0
102 #define XBF_ORDERED 0
104 /* debugging routines might need this */
105 #define XFS_BUF_BFLAGS(x) ((x)->b_flags)
106 #define XFS_BUF_ZEROFLAGS(x) ((x)->b_flags = 0)
107 #define XFS_BUF_STALE(x) ((x)->b_flags |= (XFS_B_STALE|B_NOCACHE))
108 #define XFS_BUF_UNSTALE(x) ((x)->b_flags &= ~(XFS_B_STALE|B_NOCACHE))
109 #define XFS_BUF_ISSTALE(x) ((x)->b_flags & (XFS_B_STALE|B_NOCACHE))
110 #define XFS_BUF_SUPER_STALE(x) {(x)->b_flags |= (XFS_B_STALE|B_NOCACHE); \
111 (x)->b_flags &= ~(XFS_B_DELWRI|B_CACHE);}
113 #define XFS_BUF_MANAGE B_MANAGED
114 #define XFS_BUF_UNMANAGE(x) ((x)->b_flags &= ~B_MANAGED)
116 #define XFS_BUF_DELAYWRITE(x) ((x)->b_flags |= XFS_B_DELWRI)
117 #define XFS_BUF_UNDELAYWRITE(x) ((x)->b_flags &= ~XFS_B_DELWRI)
118 #define XFS_BUF_ISDELAYWRITE(x) ((x)->b_flags & XFS_B_DELWRI)
120 #define XFS_BUF_ERROR(x,no) xfs_buf_set_error((x), (no))
121 #define XFS_BUF_GETERROR(x) xfs_buf_get_error(x)
122 #define XFS_BUF_ISERROR(x) (((x)->b_ioflags & BIO_ERROR) != 0)
124 void static __inline__
125 xfs_buf_set_error(struct buf *bp, int err)
127 bp->b_ioflags |= BIO_ERROR;
131 int static __inline__
132 xfs_buf_get_error(struct buf *bp)
134 return XFS_BUF_ISERROR(bp) ? (bp->b_error ? bp->b_error : EIO) : 0;
137 #define XFS_BUF_DONE(x) ((x)->b_flags |= B_CACHE)
138 #define XFS_BUF_UNDONE(x) ((x)->b_flags &= ~B_CACHE)
139 #define XFS_BUF_ISDONE(x) ((x)->b_flags & B_CACHE)
141 #define XFS_BUF_BUSY(x) ((x)->b_flags |= BUF_BUSY)
142 #define XFS_BUF_UNBUSY(x) ((x)->b_flags &= ~BUF_BUSY)
143 #define XFS_BUF_ISBUSY(x) (1)
145 #define XFS_BUF_ASYNC(x) ((x)->b_flags |= B_ASYNC)
146 #define XFS_BUF_UNASYNC(x) ((x)->b_flags &= ~B_ASYNC)
147 #define XFS_BUF_ISASYNC(x) ((x)->b_flags & B_ASYNC)
149 #define XFS_BUF_ORDERED(bp) ((bp)->b_flags |= XBF_ORDERED)
150 #define XFS_BUF_UNORDERED(bp) ((bp)->b_flags &= ~XBF_ORDERED)
151 #define XFS_BUF_ISORDERED(bp) ((bp)->b_flags & XBF_ORDERED)
153 #define XFS_BUF_FLUSH(x) ((x)->b_flags |= B_00800000)
154 #define XFS_BUF_UNFLUSH(x) ((x)->b_flags &= ~B_00800000)
155 #define XFS_BUF_ISFLUSH(x) ((x)->b_flags & B_00800000)
157 #define XFS_BUF_SHUT(x) printf("XFS_BUF_SHUT not implemented yet\n")
158 #define XFS_BUF_UNSHUT(x) printf("XFS_BUF_UNSHUT not implemented yet\n")
159 #define XFS_BUF_ISSHUT(x) (0)
161 #define XFS_BUF_HOLD(x) ((void)0)
162 #define XFS_BUF_UNHOLD(x) ((void)0)
163 #define XFS_BUF_ISHOLD(x) BUF_REFCNT(x)
165 #define XFS_BUF_READ(x) ((x)->b_iocmd = BIO_READ)
166 #define XFS_BUF_UNREAD(x) ((x)->b_iocmd = 0)
167 #define XFS_BUF_ISREAD(x) ((x)->b_iocmd == BIO_READ)
169 #define XFS_BUF_WRITE(x) ((x)->b_iocmd = BIO_WRITE)
170 #define XFS_BUF_UNWRITE(x) ((x)->b_iocmd = 0)
171 #define XFS_BUF_ISWRITE(x) ((x)->b_iocmd == BIO_WRITE)
173 #define XFS_BUF_ISUNINITIAL(x) (0)
174 #define XFS_BUF_UNUNINITIAL(x) (0)
176 #define XFS_BUF_IODONE_FUNC(x) (x)->b_iodone
177 #define XFS_BUF_SET_IODONE_FUNC(x, f) (x)->b_iodone = (f)
178 #define XFS_BUF_CLR_IODONE_FUNC(x) (x)->b_iodone = NULL
180 #define XFS_BUF_SET_BDSTRAT_FUNC(x, f) do { if(f != NULL) {} } while(0)
181 #define XFS_BUF_CLR_BDSTRAT_FUNC(x) ((void)0)
183 #define XFS_BUF_BP_ISMAPPED(bp) (1)
185 #define XFS_BUF_FSPRIVATE(buf, type) \
186 ((type)(buf)->b_fsprivate1)
187 #define XFS_BUF_SET_FSPRIVATE(buf, value) \
188 (buf)->b_fsprivate1 = (void *)(value)
189 #define XFS_BUF_FSPRIVATE2(buf, type) \
190 ((type)(buf)->b_fsprivate2)
191 #define XFS_BUF_SET_FSPRIVATE2(buf, value) \
192 (buf)->b_fsprivate2 = (void *)(value)
193 #define XFS_BUF_FSPRIVATE3(buf, type) \
194 ((type)(buf)->b_fsprivate3)
195 #define XFS_BUF_SET_FSPRIVATE3(buf, value) \
196 (buf)->b_fsprivate3 = (void *)(value)
197 #define XFS_BUF_SET_START(buf) \
198 printf("XFS_BUF_SET_START: %s:%d\n", __FILE__, __LINE__)
200 #define XFS_BUF_SET_BRELSE_FUNC(buf, value) \
202 printf("XFS_BUF_SET_BRELSE_FUNC: %s:%d\n", \
203 __FILE__, __LINE__); \
204 if (value != NULL ) {} \
207 #define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_data)
209 static __inline xfs_caddr_t
210 xfs_buf_offset(xfs_buf_t *bp, size_t offset)
212 return XFS_BUF_PTR(bp) + offset;
215 #define XFS_BUF_SET_PTR(bp, val, count) \
217 (bp)->b_data = (val); \
218 (bp)->b_bcount = (count); \
221 #define XFS_BUF_ADDR(bp) ((bp)->b_blkno)
222 #define XFS_BUF_SET_ADDR(bp, blk) \
223 ((bp)->b_blkno = blk)
224 #define XFS_BUF_OFFSET(bp) ((bp)->b_offset)
225 #define XFS_BUF_SET_OFFSET(bp, off) \
226 ((bp)->b_offset = off)
227 #define XFS_BUF_COUNT(bp) ((bp)->b_bcount)
228 #define XFS_BUF_SET_COUNT(bp, cnt) \
229 ((bp)->b_bcount = cnt)
230 #define XFS_BUF_SIZE(bp) ((bp)->b_bufsize)
231 #define XFS_BUF_SET_SIZE(bp, cnt) \
232 ((bp)->b_bufsize = cnt)
233 #define XFS_BUF_SET_VTYPE_REF(bp, type, ref)
234 #define XFS_BUF_SET_VTYPE(bp, type)
235 #define XFS_BUF_SET_REF(bp, ref)
237 #define XFS_BUF_VALUSEMA(bp) (BUF_REFCNT(bp)? 0 : 1)
238 #define XFS_BUF_CPSEMA(bp) \
239 (BUF_LOCK(bp, LK_EXCLUSIVE|LK_CANRECURSE | LK_SLEEPFAIL, NULL) == 0)
241 #define XFS_BUF_PSEMA(bp,x) BUF_LOCK(bp, LK_EXCLUSIVE|LK_CANRECURSE, NULL)
242 #define XFS_BUF_VSEMA(bp) BUF_UNLOCK(bp)
244 #define XFS_BUF_V_IODONESEMA(bp) bdone(bp)
246 /* setup the buffer target from a buftarg structure */
247 #define XFS_BUF_SET_TARGET(bp, target) \
248 xfs_buf_set_target(bp, target)
250 void xfs_buf_set_target(xfs_buf_t *, xfs_buftarg_t *);
251 xfs_buftarg_t *xfs_buf_get_target(xfs_buf_t *);
253 /* return the dev_t being used */
254 #define XFS_BUF_TARGET(bp) xfs_buf_get_target(bp)
255 #define XFS_BUFTARG_NAME(targp) devtoname((targp)->dev)
257 #define XFS_BUF_SET_VTYPE_REF(bp, type, ref)
258 #define XFS_BUF_SET_VTYPE(bp, type)
259 #define XFS_BUF_SET_REF(bp, ref)
261 #define XFS_BUF_ISPINNED(bp) xfs_buf_ispin(bp)
264 xfs_buf_read_flags(xfs_buftarg_t *, xfs_daddr_t, size_t, int);
266 #define xfs_buf_read(target, blkno, len, flags) \
267 xfs_buf_read_flags(target, blkno, len, \
268 XFS_BUF_LOCK | XFS_BUF_MAPPED)
271 xfs_buf_get_flags(xfs_buftarg_t *, xfs_daddr_t, size_t, int);
273 #define xfs_buf_get(target, blkno, len, flags) \
274 xfs_buf_get_flags(target, blkno, len, \
275 XFS_BUF_LOCK | XFS_BUF_MAPPED)
277 /* the return value is never used ... why does linux define this functions this way? */
278 static inline int xfs_bawrite(void *mp, xfs_buf_t *bp)
280 /* Ditto for xfs_bawrite
282 bp->b_strat = xfs_bdstrat_cb;
283 xfs_buf_delwri_dequeue(bp);
284 return xfs_buf_iostart(bp, XBF_WRITE | XBF_ASYNC | _XBF_RUN_QUEUES);
290 static inline int xfs_bdwrite(void *mp, xfs_buf_t *bp)
292 /* this is for io shutdown checking need to do this at some point RMC */
293 /* probably should just change xfs to call a buf write function */
295 bp->b_strat = xfs_bdstrat_cb;
297 return xfs_buf_iostart(bp, XBF_DELWRI | XBF_ASYNC);
303 #define xfs_bpin(bp) xfs_buf_pin(bp)
304 #define xfs_bunpin(bp) xfs_buf_unpin(bp)
306 #define xfs_buf_relse(bp) brelse(bp)
307 #define xfs_bp_mapin(bp) bp_mapin(bp)
308 #define xfs_xfsd_list_evict(x) _xfs_xfsd_list_evict(x)
309 #define xfs_buftrace(x,y) CTR2(KTR_BUF, "%s bp %p flags %X", bp, bp->b_flags)
310 #define xfs_biodone(bp) bufdone_finish(bp)
312 #define xfs_incore(xfs_buftarg,blkno,len,lockit) \
313 incore(&xfs_buftarg->specvp->v_bufobj, blkno);
315 #define xfs_biomove(bp, off, len, data, rw) \
316 xfs_buf_iomove((bp), (off), (len), (data), \
317 ((rw) == XFS_B_WRITE) ? XBRW_WRITE : XBRW_READ)
319 #define xfs_biozero(bp, off, len) \
320 xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)
322 /* already a function xfs_bwrite... fix this */
323 #define XFS_bdwrite(bp) bdwrite(bp)
324 #define xfs_iowait(bp) bufwait(bp)
326 #define XFS_bdstrat(bp) xfs_buf_iorequest(bp)
328 #define xfs_baread(target, rablkno, ralen) \
329 xfs_buf_readahead((target), (rablkno), (ralen), XBF_DONT_BLOCK)
333 int XFS_bwrite(xfs_buf_t *bp);
334 xfs_buf_t* xfs_buf_get_empty(size_t, xfs_buftarg_t *targ);
335 xfs_buf_t* xfs_buf_get_noaddr(size_t, xfs_buftarg_t *targ);
336 void xfs_buf_free(xfs_buf_t *);
338 extern void xfs_bwait_unpin(xfs_buf_t *bp);
339 extern xfs_buftarg_t *xfs_alloc_buftarg(struct vnode *, int);
340 extern void xfs_free_buftarg(xfs_buftarg_t *, int);
341 extern void xfs_wait_buftarg(xfs_buftarg_t *);
342 extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int);
343 extern unsigned int xfs_getsize_buftarg(struct xfs_buftarg *);
344 extern int xfs_flush_buftarg(xfs_buftarg_t *, int);
346 #define xfs_binval(buftarg) xfs_flush_buftarg(buftarg, 1)
347 #define XFS_bflush(buftarg) xfs_flush_buftarg(buftarg, 1)