projects / mirror_spl.git / blame
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|---|---|---|
| 716154c5 BB |
1 | /*****************************************************************************\ |
| 2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
| 3 | * Copyright (C) 2007 The Regents of the University of California. | |
| 4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
| 5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
| 6 | * UCRL-CODE-235197 | |
| 7 | * | |
| 8 | * This file is part of the SPL, Solaris Porting Layer. | |
| 3d6af2dd | 9 | * For details, see <http://zfsonlinux.org/>. |
| 716154c5 BB |
10 | * |
| 11 | * The SPL is free software; you can redistribute it and/or modify it | |
| 12 | * under the terms of the GNU General Public License as published by the | |
| 13 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 14 | * option) any later version. | |
| 15 | * | |
| 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
| 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 19 | * for more details. | |
| 20 | * | |
| 21 | * You should have received a copy of the GNU General Public License along | |
| 22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. | |
| 23 | \*****************************************************************************/ | |
| 24 | ||
| 6adf99e7 | 25 | #ifndef _SPL_UIO_H |
| 26 | #define _SPL_UIO_H | |
| 27 | ||
| 73e540a0 | 28 | #include <linux/uio.h> |
| 29 | #include <asm/uaccess.h> | |
| 30 | #include <sys/types.h> | |
| 31 | ||
| bb1bb2c4 BB |
32 | typedef struct iovec iovec_t; |
| 33 | ||
| 4b171585 | 34 | typedef enum uio_rw { |
| 35 | UIO_READ = 0, | |
| 36 | UIO_WRITE = 1, | |
| 37 | } uio_rw_t; | |
| 6adf99e7 | 38 | |
| 73e540a0 | 39 | typedef enum uio_seg { |
| 40 | UIO_USERSPACE = 0, | |
| 41 | UIO_SYSSPACE = 1, | |
| bb1bb2c4 | 42 | UIO_USERISPACE= 2, |
| 73e540a0 | 43 | } uio_seg_t; |
| 44 | ||
| 45 | typedef struct uio { | |
| bb1bb2c4 BB |
46 | struct iovec *uio_iov; |
| 47 | int uio_iovcnt; | |
| 48 | offset_t uio_loffset; | |
| 49 | uio_seg_t uio_segflg; | |
| 50 | uint16_t uio_fmode; | |
| 51 | uint16_t uio_extflg; | |
| 52 | offset_t uio_limit; | |
| 53 | ssize_t uio_resid; | |
| 73e540a0 | 54 | } uio_t; |
| 55 | ||
| 56 | typedef struct aio_req { | |
| bb1bb2c4 | 57 | uio_t *aio_uio; |
| 73e540a0 | 58 | void *aio_private; |
| 59 | } aio_req_t; | |
| 60 | ||
| bb1bb2c4 BB |
61 | typedef enum xuio_type { |
| 62 | UIOTYPE_ASYNCIO, | |
| 63 | UIOTYPE_ZEROCOPY, | |
| 64 | } xuio_type_t; | |
| 65 | ||
| 66 | ||
| 67 | #define UIOA_IOV_MAX 16 | |
| 68 | ||
| 69 | typedef struct uioa_page_s { | |
| 70 | int uioa_pfncnt; | |
| 71 | void **uioa_ppp; | |
| 72 | caddr_t uioa_base; | |
| 73 | size_t uioa_len; | |
| 74 | } uioa_page_t; | |
| 75 | ||
| 76 | typedef struct xuio { | |
| 77 | uio_t xu_uio; | |
| 78 | enum xuio_type xu_type; | |
| 79 | union { | |
| 80 | struct { | |
| 81 | uint32_t xu_a_state; | |
| 82 | ssize_t xu_a_mbytes; | |
| 83 | uioa_page_t *xu_a_lcur; | |
| 84 | void **xu_a_lppp; | |
| 85 | void *xu_a_hwst[4]; | |
| 86 | uioa_page_t xu_a_locked[UIOA_IOV_MAX]; | |
| 87 | } xu_aio; | |
| 88 | ||
| 89 | struct { | |
| 90 | int xu_zc_rw; | |
| 91 | void *xu_zc_priv; | |
| 92 | } xu_zc; | |
| 93 | } xu_ext; | |
| 94 | } xuio_t; | |
| 95 | ||
| 96 | #define XUIO_XUZC_PRIV(xuio) xuio->xu_ext.xu_zc.xu_zc_priv | |
| 97 | #define XUIO_XUZC_RW(xuio) xuio->xu_ext.xu_zc.xu_zc_rw | |
| 98 | ||
| 6adf99e7 | 99 | #endif /* SPL_UIO_H */ |