include/sys/fs/ufs_bio.h

   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, bool force_wait,
  66                                         bool 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, false, true, \
  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, false, true, \
  78         /* clear_flags */ (B_READ | B_DONE | B_ERROR | B_DELWRI))
  79 #define UFS_BWRITE2(ufsvfsp, bp) \
  80         bwrite_common(ufsvfsp, bp, true, false, \
  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 */