1 files changed, 106 insertions, 0 deletions
diff --git a/include/spl/sys/uio.h b/include/spl/sys/uio.h
new file mode 100644
index 000000000..64c452b8d
--- /dev/null
+++ b/include/spl/sys/uio.h
@@ -0,0 +1,106 @@
+/*
+ *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+ *  Copyright (C) 2007 The Regents of the University of California.
+ *  Copyright (c) 2015 by Chunwei Chen. All rights reserved.
+ *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ *  Written by Brian Behlendorf <[email protected]>.
+ *  UCRL-CODE-235197
+ *
+ *  This file is part of the SPL, Solaris Porting Layer.
+ *  For details, see <http://zfsonlinux.org/>.
+ *
+ *  The SPL is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  The SPL is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SPL_UIO_H
+#define	_SPL_UIO_H
+
+#include <linux/uio.h>
+#include <linux/blkdev.h>
+#include <asm/uaccess.h>
+#include <sys/types.h>
+
+typedef struct iovec iovec_t;
+
+typedef enum uio_rw {
+	UIO_READ =		0,
+	UIO_WRITE =		1,
+} uio_rw_t;
+
+typedef enum uio_seg {
+	UIO_USERSPACE =		0,
+	UIO_SYSSPACE =		1,
+	UIO_USERISPACE =	2,
+	UIO_BVEC =		3,
+} uio_seg_t;
+
+typedef struct uio {
+	union {
+		const struct iovec	*uio_iov;
+		const struct bio_vec	*uio_bvec;
+	};
+	int		uio_iovcnt;
+	offset_t	uio_loffset;
+	uio_seg_t	uio_segflg;
+	uint16_t	uio_fmode;
+	uint16_t	uio_extflg;
+	offset_t	uio_limit;
+	ssize_t		uio_resid;
+	size_t		uio_skip;
+} uio_t;
+
+typedef struct aio_req {
+	uio_t		*aio_uio;
+	void		*aio_private;
+} aio_req_t;
+
+typedef enum xuio_type {
+	UIOTYPE_ASYNCIO,
+	UIOTYPE_ZEROCOPY,
+} xuio_type_t;
+
+
+#define	UIOA_IOV_MAX    16
+
+typedef struct uioa_page_s {
+	int	uioa_pfncnt;
+	void	**uioa_ppp;
+	caddr_t	uioa_base;
+	size_t	uioa_len;
+} uioa_page_t;
+
+typedef struct xuio {
+	uio_t xu_uio;
+	enum xuio_type xu_type;
+	union {
+		struct {
+			uint32_t xu_a_state;
+			ssize_t xu_a_mbytes;
+			uioa_page_t *xu_a_lcur;
+			void **xu_a_lppp;
+			void *xu_a_hwst[4];
+			uioa_page_t xu_a_locked[UIOA_IOV_MAX];
+		} xu_aio;
+
+		struct {
+			int xu_zc_rw;
+			void *xu_zc_priv;
+		} xu_zc;
+	} xu_ext;
+} xuio_t;
+
+#define	XUIO_XUZC_PRIV(xuio)	xuio->xu_ext.xu_zc.xu_zc_priv
+#define	XUIO_XUZC_RW(xuio)	xuio->xu_ext.xu_zc.xu_zc_rw
+
+#endif /* SPL_UIO_H */