1 /* 2 * Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _OPENSOLARIS_SYS_UIO_H_ 30 #define _OPENSOLARIS_SYS_UIO_H_ 31 32 #ifndef _STANDALONE 33 34 #include_next <sys/uio.h> 35 #include <sys/_uio.h> 36 #include <sys/debug.h> 37 #include <sys/sysmacros.h> 38 39 /* 40 * uio_extflg: extended flags 41 */ 42 #define UIO_DIRECT 0x0001 /* Direct I/O requset */ 43 44 typedef struct iovec iovec_t; 45 typedef enum uio_seg zfs_uio_seg_t; 46 typedef enum uio_rw zfs_uio_rw_t; 47 48 /* 49 * This structure is used when doing Direct I/O. 50 */ 51 typedef struct { 52 vm_page_t *pages; 53 int npages; 54 } zfs_uio_dio_t; 55 56 typedef struct zfs_uio { 57 struct uio *uio; 58 offset_t uio_soffset; 59 uint16_t uio_extflg; 60 zfs_uio_dio_t uio_dio; 61 } zfs_uio_t; 62 63 #define GET_UIO_STRUCT(u) (u)->uio 64 #define zfs_uio_segflg(u) GET_UIO_STRUCT(u)->uio_segflg 65 #define zfs_uio_offset(u) GET_UIO_STRUCT(u)->uio_offset 66 #define zfs_uio_resid(u) GET_UIO_STRUCT(u)->uio_resid 67 #define zfs_uio_iovcnt(u) GET_UIO_STRUCT(u)->uio_iovcnt 68 #define zfs_uio_iovlen(u, idx) GET_UIO_STRUCT(u)->uio_iov[(idx)].iov_len 69 #define zfs_uio_iovbase(u, idx) GET_UIO_STRUCT(u)->uio_iov[(idx)].iov_base 70 #define zfs_uio_td(u) GET_UIO_STRUCT(u)->uio_td 71 #define zfs_uio_rw(u) GET_UIO_STRUCT(u)->uio_rw 72 #define zfs_uio_soffset(u) (u)->uio_soffset 73 #define zfs_uio_fault_disable(u, set) 74 #define zfs_uio_prefaultpages(size, u) (0) 75 76 static inline void 77 zfs_uio_setoffset(zfs_uio_t *uio, offset_t off) 78 { 79 zfs_uio_offset(uio) = off; 80 } 81 82 static inline void 83 zfs_uio_setsoffset(zfs_uio_t *uio, offset_t off) 84 { 85 ASSERT3U(zfs_uio_offset(uio), ==, off); 86 zfs_uio_soffset(uio) = off; 87 } 88 89 static inline void 90 zfs_uio_advance(zfs_uio_t *uio, ssize_t size) 91 { 92 zfs_uio_resid(uio) -= size; 93 zfs_uio_offset(uio) += size; 94 } 95 96 static __inline void 97 zfs_uio_init(zfs_uio_t *uio, struct uio *uio_s) 98 { 99 memset(uio, 0, sizeof (zfs_uio_t)); 100 if (uio_s != NULL) { 101 GET_UIO_STRUCT(uio) = uio_s; 102 zfs_uio_soffset(uio) = uio_s->uio_offset; 103 } 104 } 105 106 int zfs_uio_fault_move(void *p, size_t n, zfs_uio_rw_t dir, zfs_uio_t *uio); 107 108 #endif /* !_STANDALONE */ 109 110 #endif /* !_OPENSOLARIS_SYS_UIO_H_ */ 111