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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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _ZIO_IMPL_H
#define _ZIO_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/zfs_context.h>
#include <sys/zio.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* I/O Groups: pipeline stage definitions.
*/
typedef enum zio_stage {
ZIO_STAGE_OPEN = 0, /* RWFCI */
ZIO_STAGE_WAIT_CHILDREN_READY, /* RWFCI */
ZIO_STAGE_WRITE_COMPRESS, /* -W--- */
ZIO_STAGE_CHECKSUM_GENERATE, /* -W--- */
ZIO_STAGE_GANG_PIPELINE, /* -WFC- */
ZIO_STAGE_GET_GANG_HEADER, /* -WFC- */
ZIO_STAGE_REWRITE_GANG_MEMBERS, /* -W--- */
ZIO_STAGE_FREE_GANG_MEMBERS, /* --F-- */
ZIO_STAGE_CLAIM_GANG_MEMBERS, /* ---C- */
ZIO_STAGE_DVA_ALLOCATE, /* -W--- */
ZIO_STAGE_DVA_FREE, /* --F-- */
ZIO_STAGE_DVA_CLAIM, /* ---C- */
ZIO_STAGE_GANG_CHECKSUM_GENERATE, /* -W--- */
ZIO_STAGE_READY, /* RWFCI */
ZIO_STAGE_VDEV_IO_START, /* RW--I */
ZIO_STAGE_VDEV_IO_DONE, /* RW--I */
ZIO_STAGE_VDEV_IO_ASSESS, /* RW--I */
ZIO_STAGE_WAIT_CHILDREN_DONE, /* RWFCI */
ZIO_STAGE_CHECKSUM_VERIFY, /* R---- */
ZIO_STAGE_READ_GANG_MEMBERS, /* R---- */
ZIO_STAGE_READ_DECOMPRESS, /* R---- */
ZIO_STAGE_DONE /* RWFCI */
} zio_stage_t;
/*
* The stages for which there's some performance value in going async.
* When compression is enabled, ZIO_STAGE_WRITE_COMPRESS is ORed in as well.
*/
#define ZIO_ASYNC_PIPELINE_STAGES \
((1U << ZIO_STAGE_CHECKSUM_GENERATE) | \
(1U << ZIO_STAGE_VDEV_IO_DONE) | \
(1U << ZIO_STAGE_CHECKSUM_VERIFY) | \
(1U << ZIO_STAGE_READ_DECOMPRESS))
#define ZIO_VDEV_IO_PIPELINE \
((1U << ZIO_STAGE_VDEV_IO_START) | \
(1U << ZIO_STAGE_VDEV_IO_DONE) | \
(1U << ZIO_STAGE_VDEV_IO_ASSESS))
#define ZIO_READ_PHYS_PIPELINE \
((1U << ZIO_STAGE_OPEN) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \
(1U << ZIO_STAGE_READY) | \
ZIO_VDEV_IO_PIPELINE | \
(1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_CHECKSUM_VERIFY) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_READ_PIPELINE \
ZIO_READ_PHYS_PIPELINE
#define ZIO_WRITE_PHYS_PIPELINE \
((1U << ZIO_STAGE_OPEN) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \
(1U << ZIO_STAGE_CHECKSUM_GENERATE) | \
(1U << ZIO_STAGE_READY) | \
ZIO_VDEV_IO_PIPELINE | \
(1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_WRITE_COMMON_PIPELINE \
ZIO_WRITE_PHYS_PIPELINE
#define ZIO_WRITE_PIPELINE \
((1U << ZIO_STAGE_WRITE_COMPRESS) | \
ZIO_WRITE_COMMON_PIPELINE)
#define ZIO_GANG_STAGES \
((1U << ZIO_STAGE_GET_GANG_HEADER) | \
(1U << ZIO_STAGE_REWRITE_GANG_MEMBERS) | \
(1U << ZIO_STAGE_FREE_GANG_MEMBERS) | \
(1U << ZIO_STAGE_CLAIM_GANG_MEMBERS) | \
(1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE) | \
(1U << ZIO_STAGE_READ_GANG_MEMBERS))
#define ZIO_REWRITE_PIPELINE \
((1U << ZIO_STAGE_GANG_PIPELINE) | \
(1U << ZIO_STAGE_GET_GANG_HEADER) | \
(1U << ZIO_STAGE_REWRITE_GANG_MEMBERS) | \
(1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE) | \
ZIO_WRITE_COMMON_PIPELINE)
#define ZIO_WRITE_ALLOCATE_PIPELINE \
((1U << ZIO_STAGE_DVA_ALLOCATE) | \
ZIO_WRITE_COMMON_PIPELINE)
#define ZIO_GANG_FREE_STAGES \
((1U << ZIO_STAGE_GET_GANG_HEADER) | \
(1U << ZIO_STAGE_FREE_GANG_MEMBERS))
#define ZIO_FREE_PIPELINE \
((1U << ZIO_STAGE_OPEN) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \
(1U << ZIO_STAGE_GANG_PIPELINE) | \
(1U << ZIO_STAGE_GET_GANG_HEADER) | \
(1U << ZIO_STAGE_FREE_GANG_MEMBERS) | \
(1U << ZIO_STAGE_DVA_FREE) | \
(1U << ZIO_STAGE_READY) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_CLAIM_PIPELINE \
((1U << ZIO_STAGE_OPEN) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \
(1U << ZIO_STAGE_GANG_PIPELINE) | \
(1U << ZIO_STAGE_GET_GANG_HEADER) | \
(1U << ZIO_STAGE_CLAIM_GANG_MEMBERS) | \
(1U << ZIO_STAGE_DVA_CLAIM) | \
(1U << ZIO_STAGE_READY) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_IOCTL_PIPELINE \
((1U << ZIO_STAGE_OPEN) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \
(1U << ZIO_STAGE_READY) | \
ZIO_VDEV_IO_PIPELINE | \
(1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_WAIT_FOR_CHILDREN_PIPELINE \
((1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \
(1U << ZIO_STAGE_READY) | \
(1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_WAIT_FOR_CHILDREN_DONE_PIPELINE \
((1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \
(1U << ZIO_STAGE_DONE))
#define ZIO_VDEV_CHILD_PIPELINE \
(ZIO_WAIT_FOR_CHILDREN_DONE_PIPELINE | \
ZIO_VDEV_IO_PIPELINE)
#define ZIO_ERROR_PIPELINE_MASK \
ZIO_WAIT_FOR_CHILDREN_PIPELINE
typedef struct zio_transform zio_transform_t;
struct zio_transform {
void *zt_data;
uint64_t zt_size;
uint64_t zt_bufsize;
zio_transform_t *zt_next;
};
extern void zio_inject_init(void);
extern void zio_inject_fini(void);
#ifdef __cplusplus
}
#endif
#endif /* _ZIO_IMPL_H */
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