sys/zio_impl.h

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/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _ZIO_IMPL_H
#define _ZIO_IMPL_H

#include <sys/zfs_context.h>
#include <sys/zio.h>

#ifdef  __cplusplus
extern "C" {
#endif

enum zio_stage {
        ZIO_STAGE_OPEN                  = 1 << 0,       
        ZIO_STAGE_READ_BP_INIT          = 1 << 1,       
        ZIO_STAGE_FREE_BP_INIT          = 1 << 2,       
        ZIO_STAGE_ISSUE_ASYNC           = 1 << 3,       
        ZIO_STAGE_WRITE_BP_INIT         = 1 << 4,       
        ZIO_STAGE_CHECKSUM_GENERATE     = 1 << 5,       
        ZIO_STAGE_DDT_READ_START        = 1 << 6,       
        ZIO_STAGE_DDT_READ_DONE         = 1 << 7,       
        ZIO_STAGE_DDT_WRITE             = 1 << 8,       
        ZIO_STAGE_DDT_FREE              = 1 << 9,       
        ZIO_STAGE_GANG_ASSEMBLE         = 1 << 10,      
        ZIO_STAGE_GANG_ISSUE            = 1 << 11,      
        ZIO_STAGE_DVA_ALLOCATE          = 1 << 12,      
        ZIO_STAGE_DVA_FREE              = 1 << 13,      
        ZIO_STAGE_DVA_CLAIM             = 1 << 14,      
        ZIO_STAGE_READY                 = 1 << 15,      
        ZIO_STAGE_VDEV_IO_START         = 1 << 16,      
        ZIO_STAGE_VDEV_IO_DONE          = 1 << 17,      
        ZIO_STAGE_VDEV_IO_ASSESS        = 1 << 18,      
        ZIO_STAGE_CHECKSUM_VERIFY       = 1 << 19,      
        ZIO_STAGE_DONE                  = 1 << 20       
};

#define ZIO_INTERLOCK_STAGES                    \
        (ZIO_STAGE_READY |                      \
        ZIO_STAGE_DONE)

#define ZIO_INTERLOCK_PIPELINE                  \
        ZIO_INTERLOCK_STAGES

#define ZIO_VDEV_IO_STAGES                      \
        (ZIO_STAGE_VDEV_IO_START |              \
        ZIO_STAGE_VDEV_IO_DONE |                \
        ZIO_STAGE_VDEV_IO_ASSESS)

#define ZIO_VDEV_CHILD_PIPELINE                 \
        (ZIO_VDEV_IO_STAGES |                   \
        ZIO_STAGE_DONE)

#define ZIO_READ_COMMON_STAGES                  \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_VDEV_IO_STAGES |                    \
        ZIO_STAGE_CHECKSUM_VERIFY)

#define ZIO_READ_PHYS_PIPELINE                  \
        ZIO_READ_COMMON_STAGES

#define ZIO_READ_PIPELINE                       \
        (ZIO_READ_COMMON_STAGES |               \
        ZIO_STAGE_READ_BP_INIT)

#define ZIO_DDT_CHILD_READ_PIPELINE             \
        ZIO_READ_COMMON_STAGES

#define ZIO_DDT_READ_PIPELINE                   \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_STAGE_READ_BP_INIT |                \
        ZIO_STAGE_DDT_READ_START |              \
        ZIO_STAGE_DDT_READ_DONE)

#define ZIO_WRITE_COMMON_STAGES                 \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_VDEV_IO_STAGES |                    \
        ZIO_STAGE_ISSUE_ASYNC |                 \
        ZIO_STAGE_CHECKSUM_GENERATE)

#define ZIO_WRITE_PHYS_PIPELINE                 \
        ZIO_WRITE_COMMON_STAGES

#define ZIO_REWRITE_PIPELINE                    \
        (ZIO_WRITE_COMMON_STAGES |              \
        ZIO_STAGE_WRITE_BP_INIT)

#define ZIO_WRITE_PIPELINE                      \
        (ZIO_WRITE_COMMON_STAGES |              \
        ZIO_STAGE_WRITE_BP_INIT |               \
        ZIO_STAGE_DVA_ALLOCATE)

#define ZIO_DDT_CHILD_WRITE_PIPELINE            \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_VDEV_IO_STAGES |                    \
        ZIO_STAGE_DVA_ALLOCATE)

#define ZIO_DDT_WRITE_PIPELINE                  \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_STAGE_ISSUE_ASYNC |                 \
        ZIO_STAGE_WRITE_BP_INIT |               \
        ZIO_STAGE_CHECKSUM_GENERATE |           \
        ZIO_STAGE_DDT_WRITE)

#define ZIO_GANG_STAGES                         \
        (ZIO_STAGE_GANG_ASSEMBLE |              \
        ZIO_STAGE_GANG_ISSUE)

#define ZIO_FREE_PIPELINE                       \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_STAGE_FREE_BP_INIT |                \
        ZIO_STAGE_DVA_FREE |                    \
        ZIO_STAGE_VDEV_IO_START |               \
        ZIO_STAGE_VDEV_IO_ASSESS)

#define ZIO_DDT_FREE_PIPELINE                   \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_STAGE_FREE_BP_INIT |                \
        ZIO_STAGE_ISSUE_ASYNC |                 \
        ZIO_STAGE_DDT_FREE)

#define ZIO_CLAIM_PIPELINE                      \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_STAGE_DVA_CLAIM)

#define ZIO_IOCTL_PIPELINE                      \
        (ZIO_INTERLOCK_STAGES |                 \
        ZIO_STAGE_VDEV_IO_START |               \
        ZIO_STAGE_VDEV_IO_ASSESS)

#define ZIO_BLOCKING_STAGES                     \
        (ZIO_STAGE_DVA_ALLOCATE |               \
        ZIO_STAGE_DVA_CLAIM |                   \
        ZIO_STAGE_VDEV_IO_START)

extern void zio_inject_init(void);
extern void zio_inject_fini(void);

#ifdef  __cplusplus
}
#endif

#endif  /* _ZIO_IMPL_H */