Add basic uio support

This code originates in OpenSolaris and was modified by KQ Infotech
to be compatible with Linux.  While supporting uios in the short
term is useful to get something working this is not an abstraction
we want to keep.  This code is expected to be short lived and
removed as soon as all the remaining uio based APIs and updated.

4 files changed, 54 insertions, 2 deletions

diff --git a/include/sys/Makefile.am b/include/sys/Makefile.am
index 1aeb5da2d..a2e8dd01b 100644
--- a/include/sys/Makefile.am
+++ b/include/sys/Makefile.am
@@ -42,6 +42,7 @@ COMMON_H = \
 	$(top_srcdir)/include/sys/u8_textprep.h \
 	$(top_srcdir)/include/sys/uberblock.h \
 	$(top_srcdir)/include/sys/uberblock_impl.h \
+	$(top_srcdir)/include/sys/uio_impl.h \
 	$(top_srcdir)/include/sys/unique.h \
 	$(top_srcdir)/include/sys/uuid.h \
 	$(top_srcdir)/include/sys/vdev_disk.h \
diff --git a/include/sys/Makefile.in b/include/sys/Makefile.in
index 59066479a..4ab3927b0 100644
--- a/include/sys/Makefile.in
+++ b/include/sys/Makefile.in
@@ -132,6 +132,7 @@ am__kernel_HEADERS_DIST = $(top_srcdir)/include/sys/arc.h \
 	$(top_srcdir)/include/sys/u8_textprep.h \
 	$(top_srcdir)/include/sys/uberblock.h \
 	$(top_srcdir)/include/sys/uberblock_impl.h \
+	$(top_srcdir)/include/sys/uio_impl.h \
 	$(top_srcdir)/include/sys/unique.h \
 	$(top_srcdir)/include/sys/uuid.h \
 	$(top_srcdir)/include/sys/vdev_disk.h \
@@ -227,6 +228,7 @@ am__libzfs_HEADERS_DIST = $(top_srcdir)/include/sys/arc.h \
 	$(top_srcdir)/include/sys/u8_textprep.h \
 	$(top_srcdir)/include/sys/uberblock.h \
 	$(top_srcdir)/include/sys/uberblock_impl.h \
+	$(top_srcdir)/include/sys/uio_impl.h \
 	$(top_srcdir)/include/sys/unique.h \
 	$(top_srcdir)/include/sys/uuid.h \
 	$(top_srcdir)/include/sys/vdev_disk.h \
@@ -498,6 +500,7 @@ COMMON_H = \
 	$(top_srcdir)/include/sys/u8_textprep.h \
 	$(top_srcdir)/include/sys/uberblock.h \
 	$(top_srcdir)/include/sys/uberblock_impl.h \
+	$(top_srcdir)/include/sys/uio_impl.h \
 	$(top_srcdir)/include/sys/unique.h \
 	$(top_srcdir)/include/sys/uuid.h \
 	$(top_srcdir)/include/sys/vdev_disk.h \
diff --git a/include/sys/uio_impl.h b/include/sys/uio_impl.h
new file mode 100644
index 000000000..37e283da0
--- /dev/null
+++ b/include/sys/uio_impl.h
@@ -0,0 +1,49 @@
+/*
+ * 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 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved	*/
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#ifndef _SYS_UIO_IMPL_H
+#define	_SYS_UIO_IMPL_H
+
+#include <sys/uio.h>
+
+extern int uiomove(void *, size_t, enum uio_rw, uio_t *);
+extern void uio_prefaultpages(ssize_t, uio_t *);
+extern int uiocopy(void *, size_t, enum uio_rw, uio_t *, size_t *);
+extern void uioskip(uio_t *, size_t);
+
+#endif	/* _SYS_UIO_IMPL_H */
diff --git a/include/sys/zfs_context.h b/include/sys/zfs_context.h
index 44e3dd1d3..0ebacbc64 100644
--- a/include/sys/zfs_context.h
+++ b/include/sys/zfs_context.h
@@ -49,12 +49,11 @@
 #include <sys/byteorder.h>
 #include <sys/systm.h>
 #include <sys/list.h>
-#include <sys/uio.h>
+#include <sys/uio_impl.h>
 #include <sys/dirent.h>
 #include <sys/time.h>
 #include <vm/seg_kmem.h>
 #include <sys/zone.h>
-#include <sys/uio.h>
 #include <sys/zfs_debug.h>
 #include <sys/fm/fs/zfs.h>
 #include <sys/sunddi.h>