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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1997,2001 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #ifndef _SYS_FS_UFS_BIO_H
     28 #define	_SYS_FS_UFS_BIO_H
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #include <sys/t_lock.h>
     33 #include <sys/kstat.h>
     34 
     35 #ifdef	__cplusplus
     36 extern "C" {
     37 #endif
     38 
     39 /*
     40  * Statistics on ufs buffer cache
     41  * Not protected by locks
     42  */
     43 struct ufsbiostats {
     44 	kstat_named_t ub_breads;	/* ufs_bread */
     45 	kstat_named_t ub_bwrites;	/* ufs_bwrite and ufs_bwrite2 */
     46 	kstat_named_t ub_fbiwrites;	/* ufs_fbiwrite */
     47 	kstat_named_t ub_getpages;	/* ufs_getpage_miss */
     48 	kstat_named_t ub_getras;	/* ufs_getpage_ra */
     49 	kstat_named_t ub_putsyncs;	/* ufs_putapage (B_SYNC) */
     50 	kstat_named_t ub_putasyncs;	/* ufs_putapage (B_ASYNC) */
     51 	kstat_named_t ub_pageios;	/* ufs_pageios (swap) */
     52 };
     53 
     54 extern struct ufsbiostats ub;
     55 
     56 #if defined(_KERNEL)
     57 
     58 /*
     59  * let's define macros for the ufs_bio calls (as they were originally
     60  * defined name-wise).  using these macros to access the appropriate
     61  * *_common routines to minimize subroutine calls.
     62  */
     63 extern struct buf *bread_common(void *arg, dev_t dev,
     64 					daddr_t blkno, long bsize);
     65 extern void bwrite_common(void *arg, struct buf *bp, int force_wait,
     66 					int do_relse, int clear_flags);
     67 extern struct buf *getblk_common(void * arg, dev_t dev,
     68 					daddr_t blkno, long bsize, int flag);
     69 
     70 #define	UFS_BREAD(ufsvfsp, dev, blkno, bsize)	\
     71 	bread_common(ufsvfsp, dev, blkno, bsize)
     72 #define	UFS_BWRITE(ufsvfsp, bp)	\
     73 	bwrite_common(ufsvfsp, bp, /* force_wait */ 0, /* do_relse */ 1, \
     74 	/* clear_flags */ (B_READ | B_DONE | B_ERROR | B_DELWRI))
     75 #define	UFS_BRWRITE(ufsvfsp, bp)	\
     76 	(bp)->b_flags |= B_RETRYWRI; \
     77 	bwrite_common(ufsvfsp, bp, /* force_wait */ 0, /* do_relse */ 1, \
     78 	/* clear_flags */ (B_READ | B_DONE | B_ERROR | B_DELWRI))
     79 #define	UFS_BWRITE2(ufsvfsp, bp) \
     80 	bwrite_common(ufsvfsp, bp, /* force_wait */ 1, /* do_relse */ 0, \
     81 	/* clear_flags */ (B_READ | B_DONE | B_ERROR | B_DELWRI))
     82 #define	UFS_GETBLK(ufsvfsp, dev, blkno, bsize)	\
     83 	getblk_common(ufsvfsp, dev, blkno, bsize, /* errflg */ 0)
     84 
     85 #endif	/* defined(_KERNEL) */
     86 
     87 #ifdef	__cplusplus
     88 }
     89 #endif
     90 
     91 #endif	/* _SYS_FS_UFS_BIO_H */
     92