108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/*
|
|
* 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 <behlendorf1@llnl.gov>.
|
|
* 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;
|
|
boolean_t uio_fault_disable;
|
|
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 */
|