1 files changed, 92 insertions, 0 deletions
diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_uio.c b/sys/cddl/compat/opensolaris/kern/opensolaris_uio.c
new file mode 100644
index 000000000000..e6b760e69812
--- /dev/null
+++ b/sys/cddl/compat/opensolaris/kern/opensolaris_uio.c
@@ -0,0 +1,92 @@
+/*
+ * 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.
+ */
+
+/*      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.
+ */
+
+/*
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/vnode.h>
+
+/*
+ * same as uiomove() but doesn't modify uio structure.
+ * return in cbytes how many bytes were copied.
+ */
+int
+uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes)
+{
+	struct iovec small_iovec[1];
+	struct uio small_uio_clone;
+	struct uio *uio_clone;
+	int error;
+
+	ASSERT3U(uio->uio_rw, ==, rw);
+	if (uio->uio_iovcnt == 1) {
+		small_uio_clone = *uio;
+		small_iovec[0] = *uio->uio_iov;
+		small_uio_clone.uio_iov = small_iovec;
+		uio_clone = &small_uio_clone;
+	} else {
+		uio_clone = cloneuio(uio);
+	}
+
+	error = vn_io_fault_uiomove(p, n, uio_clone);
+	*cbytes = uio->uio_resid - uio_clone->uio_resid;
+	if (uio_clone != &small_uio_clone)
+		free(uio_clone, M_IOV);
+	return (error);
+}
+
+/*
+ * Drop the next n chars out of *uiop.
+ */
+void
+uioskip(uio_t *uio, size_t n)
+{
+	enum uio_seg segflg;
+
+	/* For the full compatibility with illumos. */
+	if (n > uio->uio_resid)
+		return;
+
+	segflg = uio->uio_segflg;
+	uio->uio_segflg = UIO_NOCOPY;
+	uiomove(NULL, n, uio->uio_rw, uio);
+	uio->uio_segflg = segflg;
+}