usr/src/uts/common/fs/zfs/sys/zio_impl.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * Copyright (c) 2012 by Delphix. All rights reserved.
  28  */
  29
  30 #ifndef _ZIO_IMPL_H
  31 #define _ZIO_IMPL_H
  32
  33 #include <sys/zfs_context.h>
  34 #include <sys/zio.h>
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 /*
  41  * zio pipeline stage definitions
  42  */
  43 enum zio_stage {
  44         ZIO_STAGE_OPEN                  = 1 << 0,       /* RWFCI */
  45
  46         ZIO_STAGE_READ_BP_INIT          = 1 << 1,       /* R---- */
  47         ZIO_STAGE_FREE_BP_INIT          = 1 << 2,       /* --F-- */
  48         ZIO_STAGE_ISSUE_ASYNC           = 1 << 3,       /* RWF-- */
  49         ZIO_STAGE_WRITE_BP_INIT         = 1 << 4,       /* -W--- */
  50
  51         ZIO_STAGE_CHECKSUM_GENERATE     = 1 << 5,       /* -W--- */
  52
  53         ZIO_STAGE_DDT_READ_START        = 1 << 6,       /* R---- */
  54         ZIO_STAGE_DDT_READ_DONE         = 1 << 7,       /* R---- */
  55         ZIO_STAGE_DDT_WRITE             = 1 << 8,       /* -W--- */
  56         ZIO_STAGE_DDT_FREE              = 1 << 9,       /* --F-- */
  57
  58         ZIO_STAGE_GANG_ASSEMBLE         = 1 << 10,      /* RWFC- */
  59         ZIO_STAGE_GANG_ISSUE            = 1 << 11,      /* RWFC- */
  60
  61         ZIO_STAGE_DVA_ALLOCATE          = 1 << 12,      /* -W--- */
  62         ZIO_STAGE_DVA_FREE              = 1 << 13,      /* --F-- */
  63         ZIO_STAGE_DVA_CLAIM             = 1 << 14,      /* ---C- */
  64
  65         ZIO_STAGE_READY                 = 1 << 15,      /* RWFCI */
  66
  67         ZIO_STAGE_VDEV_IO_START         = 1 << 16,      /* RW--I */
  68         ZIO_STAGE_VDEV_IO_DONE          = 1 << 17,      /* RW--I */
  69         ZIO_STAGE_VDEV_IO_ASSESS        = 1 << 18,      /* RW--I */
  70
  71         ZIO_STAGE_CHECKSUM_VERIFY       = 1 << 19,      /* R---- */
  72
  73         ZIO_STAGE_DONE                  = 1 << 20       /* RWFCI */
  74 };
  75
  76 #define ZIO_INTERLOCK_STAGES                    \
  77         (ZIO_STAGE_READY |                      \
  78         ZIO_STAGE_DONE)
  79
  80 #define ZIO_INTERLOCK_PIPELINE                  \
  81         ZIO_INTERLOCK_STAGES
  82
  83 #define ZIO_VDEV_IO_STAGES                      \
  84         (ZIO_STAGE_VDEV_IO_START |              \
  85         ZIO_STAGE_VDEV_IO_DONE |                \
  86         ZIO_STAGE_VDEV_IO_ASSESS)
  87
  88 #define ZIO_VDEV_CHILD_PIPELINE                 \
  89         (ZIO_VDEV_IO_STAGES |                   \
  90         ZIO_STAGE_DONE)
  91
  92 #define ZIO_READ_COMMON_STAGES                  \
  93         (ZIO_INTERLOCK_STAGES |                 \
  94         ZIO_VDEV_IO_STAGES |                    \
  95         ZIO_STAGE_CHECKSUM_VERIFY)
  96
  97 #define ZIO_READ_PHYS_PIPELINE                  \
  98         ZIO_READ_COMMON_STAGES
  99
 100 #define ZIO_READ_PIPELINE                       \
 101         (ZIO_READ_COMMON_STAGES |               \
 102         ZIO_STAGE_READ_BP_INIT)
 103
 104 #define ZIO_DDT_CHILD_READ_PIPELINE             \
 105         ZIO_READ_COMMON_STAGES
 106
 107 #define ZIO_DDT_READ_PIPELINE                   \
 108         (ZIO_INTERLOCK_STAGES |                 \
 109         ZIO_STAGE_READ_BP_INIT |                \
 110         ZIO_STAGE_DDT_READ_START |              \
 111         ZIO_STAGE_DDT_READ_DONE)
 112
 113 #define ZIO_WRITE_COMMON_STAGES                 \
 114         (ZIO_INTERLOCK_STAGES |                 \
 115         ZIO_VDEV_IO_STAGES |                    \
 116         ZIO_STAGE_ISSUE_ASYNC |                 \
 117         ZIO_STAGE_CHECKSUM_GENERATE)
 118
 119 #define ZIO_WRITE_PHYS_PIPELINE                 \
 120         ZIO_WRITE_COMMON_STAGES
 121
 122 #define ZIO_REWRITE_PIPELINE                    \
 123         (ZIO_WRITE_COMMON_STAGES |              \
 124         ZIO_STAGE_WRITE_BP_INIT)
 125
 126 #define ZIO_WRITE_PIPELINE                      \
 127         (ZIO_WRITE_COMMON_STAGES |              \
 128         ZIO_STAGE_WRITE_BP_INIT |               \
 129         ZIO_STAGE_DVA_ALLOCATE)
 130
 131 #define ZIO_DDT_CHILD_WRITE_PIPELINE            \
 132         (ZIO_INTERLOCK_STAGES |                 \
 133         ZIO_VDEV_IO_STAGES |                    \
 134         ZIO_STAGE_DVA_ALLOCATE)
 135
 136 #define ZIO_DDT_WRITE_PIPELINE                  \
 137         (ZIO_INTERLOCK_STAGES |                 \
 138         ZIO_STAGE_ISSUE_ASYNC |                 \
 139         ZIO_STAGE_WRITE_BP_INIT |               \
 140         ZIO_STAGE_CHECKSUM_GENERATE |           \
 141         ZIO_STAGE_DDT_WRITE)
 142
 143 #define ZIO_GANG_STAGES                         \
 144         (ZIO_STAGE_GANG_ASSEMBLE |              \
 145         ZIO_STAGE_GANG_ISSUE)
 146
 147 #define ZIO_FREE_PIPELINE                       \
 148         (ZIO_INTERLOCK_STAGES |                 \
 149         ZIO_STAGE_FREE_BP_INIT |                \
 150         ZIO_STAGE_ISSUE_ASYNC |                 \
 151         ZIO_STAGE_DVA_FREE)
 152
 153 #define ZIO_DDT_FREE_PIPELINE                   \
 154         (ZIO_INTERLOCK_STAGES |                 \
 155         ZIO_STAGE_FREE_BP_INIT |                \
 156         ZIO_STAGE_ISSUE_ASYNC |                 \
 157         ZIO_STAGE_DDT_FREE)
 158
 159 #define ZIO_CLAIM_PIPELINE                      \
 160         (ZIO_INTERLOCK_STAGES |                 \
 161         ZIO_STAGE_DVA_CLAIM)
 162
 163 #define ZIO_IOCTL_PIPELINE                      \
 164         (ZIO_INTERLOCK_STAGES |                 \
 165         ZIO_STAGE_VDEV_IO_START |               \
 166         ZIO_STAGE_VDEV_IO_ASSESS)
 167
 168 #define ZIO_BLOCKING_STAGES                     \
 169         (ZIO_STAGE_DVA_ALLOCATE |               \
 170         ZIO_STAGE_DVA_CLAIM |                   \
 171         ZIO_STAGE_VDEV_IO_START)
 172
 173 extern void zio_inject_init(void);
 174 extern void zio_inject_fini(void);
 175
 176 #ifdef  __cplusplus
 177 }
 178 #endif
 179
 180 #endif  /* _ZIO_IMPL_H */