| /* |
| * 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 */ |