zfs/lib/libzpool/include/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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _ZIO_IMPL_H
  27 #define _ZIO_IMPL_H
  28
  29 #include <sys/zfs_context.h>
  30 #include <sys/zio.h>
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * I/O Groups: pipeline stage definitions.
  38  */
  39 typedef enum zio_stage {
  40         ZIO_STAGE_OPEN = 0,                     /* RWFCI */
  41
  42         ZIO_STAGE_ISSUE_ASYNC,                  /* -W--- */
  43
  44         ZIO_STAGE_READ_BP_INIT,                 /* R---- */
  45         ZIO_STAGE_WRITE_BP_INIT,                /* -W--- */
  46
  47         ZIO_STAGE_CHECKSUM_GENERATE,            /* -W--- */
  48
  49         ZIO_STAGE_GANG_ASSEMBLE,                /* RWFC- */
  50         ZIO_STAGE_GANG_ISSUE,                   /* RWFC- */
  51
  52         ZIO_STAGE_DVA_ALLOCATE,                 /* -W--- */
  53         ZIO_STAGE_DVA_FREE,                     /* --F-- */
  54         ZIO_STAGE_DVA_CLAIM,                    /* ---C- */
  55
  56         ZIO_STAGE_READY,                        /* RWFCI */
  57
  58         ZIO_STAGE_VDEV_IO_START,                /* RW--I */
  59         ZIO_STAGE_VDEV_IO_DONE,                 /* RW--I */
  60         ZIO_STAGE_VDEV_IO_ASSESS,               /* RW--I */
  61
  62         ZIO_STAGE_CHECKSUM_VERIFY,              /* R---- */
  63
  64         ZIO_STAGE_DONE,                         /* RWFCI */
  65         ZIO_STAGES
  66 } zio_stage_t;
  67
  68 #define ZIO_INTERLOCK_STAGES                                    \
  69         ((1U << ZIO_STAGE_READY) |                              \
  70         (1U << ZIO_STAGE_DONE))
  71
  72 #define ZIO_INTERLOCK_PIPELINE                                  \
  73         ZIO_INTERLOCK_STAGES
  74
  75 #define ZIO_VDEV_IO_STAGES                                      \
  76         ((1U << ZIO_STAGE_VDEV_IO_START) |                      \
  77         (1U << ZIO_STAGE_VDEV_IO_DONE) |                        \
  78         (1U << ZIO_STAGE_VDEV_IO_ASSESS))
  79
  80 #define ZIO_VDEV_CHILD_PIPELINE                                 \
  81         (ZIO_VDEV_IO_STAGES |                                   \
  82         (1U << ZIO_STAGE_DONE))
  83
  84 #define ZIO_READ_COMMON_STAGES                                  \
  85         (ZIO_INTERLOCK_STAGES |                                 \
  86         ZIO_VDEV_IO_STAGES |                                    \
  87         (1U << ZIO_STAGE_CHECKSUM_VERIFY))
  88
  89 #define ZIO_READ_PHYS_PIPELINE                                  \
  90         ZIO_READ_COMMON_STAGES
  91
  92 #define ZIO_READ_PIPELINE                                       \
  93         (ZIO_READ_COMMON_STAGES |                               \
  94         (1U << ZIO_STAGE_READ_BP_INIT))
  95
  96 #define ZIO_WRITE_COMMON_STAGES                                 \
  97         (ZIO_INTERLOCK_STAGES |                                 \
  98         ZIO_VDEV_IO_STAGES |                                    \
  99         (1U << ZIO_STAGE_ISSUE_ASYNC) |                         \
 100         (1U << ZIO_STAGE_CHECKSUM_GENERATE))
 101
 102 #define ZIO_WRITE_PHYS_PIPELINE                                 \
 103         ZIO_WRITE_COMMON_STAGES
 104
 105 #define ZIO_REWRITE_PIPELINE                                    \
 106         (ZIO_WRITE_COMMON_STAGES |                              \
 107         (1U << ZIO_STAGE_WRITE_BP_INIT))
 108
 109 #define ZIO_WRITE_PIPELINE                                      \
 110         (ZIO_WRITE_COMMON_STAGES |                              \
 111         (1U << ZIO_STAGE_WRITE_BP_INIT) |                       \
 112         (1U << ZIO_STAGE_DVA_ALLOCATE))
 113
 114 #define ZIO_GANG_STAGES                                         \
 115         ((1U << ZIO_STAGE_GANG_ASSEMBLE) |                      \
 116         (1U << ZIO_STAGE_GANG_ISSUE))
 117
 118 #define ZIO_FREE_PIPELINE                                       \
 119         (ZIO_INTERLOCK_STAGES |                                 \
 120         (1U << ZIO_STAGE_DVA_FREE))
 121
 122 #define ZIO_CLAIM_PIPELINE                                      \
 123         (ZIO_INTERLOCK_STAGES |                                 \
 124         (1U << ZIO_STAGE_DVA_CLAIM))
 125
 126 #define ZIO_IOCTL_PIPELINE                                      \
 127         (ZIO_INTERLOCK_STAGES |                                 \
 128         (1U << ZIO_STAGE_VDEV_IO_START) |                       \
 129         (1U << ZIO_STAGE_VDEV_IO_ASSESS))
 130
 131 #define ZIO_CONFIG_LOCK_BLOCKING_STAGES                         \
 132         ((1U << ZIO_STAGE_VDEV_IO_START) |                      \
 133         (1U << ZIO_STAGE_DVA_ALLOCATE) |                        \
 134         (1U << ZIO_STAGE_DVA_CLAIM))
 135
 136 extern void zio_inject_init(void);
 137 extern void zio_inject_fini(void);
 138
 139 #ifdef  __cplusplus
 140 }
 141 #endif
 142
 143 #endif  /* _ZIO_IMPL_H */