Please welcome ZFS - The last word in file systems.

ZFS file system was ported from OpenSolaris operating system. The code in under
CDDL license.

I'd like to thank all SUN developers that created this great piece of software.

Supported by:	Wheel LTD (http://www.wheel.pl/)
Supported by:	The FreeBSD Foundation (http://www.freebsdfoundation.org/)
Supported by:	Sentex (http://www.sentex.net/)

1 files changed, 205 insertions, 0 deletions

diff --git a/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zio_impl.h b/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zio_impl.h
new file mode 100644
index 000000000000..d2ddbc34e922
--- /dev/null
+++ b/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zio_impl.h
@@ -0,0 +1,205 @@
+/*
+ * 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 */