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883a40fff4
The macOS uio struct is opaque and the API must be used, this makes the smallest changes to the code for all platforms. Reviewed-by: Matt Macy <mmacy@FreeBSD.org> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Jorgen Lundman <lundman@lundman.net> Closes #10412
111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*
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* Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _OPENSOLARIS_SYS_UIO_H_
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#define _OPENSOLARIS_SYS_UIO_H_
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#include_next <sys/uio.h>
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#include <sys/_uio.h>
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#include <sys/debug.h>
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#define uio_loffset uio_offset
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typedef struct uio uio_t;
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typedef struct iovec iovec_t;
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typedef enum uio_seg uio_seg_t;
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typedef enum xuio_type {
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UIOTYPE_ASYNCIO,
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UIOTYPE_ZEROCOPY
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} xuio_type_t;
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typedef struct xuio {
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uio_t xu_uio;
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/* Extended uio fields */
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enum xuio_type xu_type; /* What kind of uio structure? */
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union {
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struct {
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int xu_zc_rw;
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void *xu_zc_priv;
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} xu_zc;
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} xu_ext;
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} xuio_t;
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#define XUIO_XUZC_PRIV(xuio) xuio->xu_ext.xu_zc.xu_zc_priv
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#define XUIO_XUZC_RW(xuio) xuio->xu_ext.xu_zc.xu_zc_rw
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static __inline int
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zfs_uiomove(void *cp, size_t n, enum uio_rw dir, uio_t *uio)
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{
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ASSERT(uio->uio_rw == dir);
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return (uiomove(cp, (int)n, uio));
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}
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#define uiomove(cp, n, dir, uio) zfs_uiomove((cp), (n), (dir), (uio))
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int uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes);
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void uioskip(uio_t *uiop, size_t n);
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#define uio_segflg(uio) (uio)->uio_segflg
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#define uio_offset(uio) (uio)->uio_loffset
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#define uio_resid(uio) (uio)->uio_resid
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#define uio_iovcnt(uio) (uio)->uio_iovcnt
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#define uio_iovlen(uio, idx) (uio)->uio_iov[(idx)].iov_len
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#define uio_iovbase(uio, idx) (uio)->uio_iov[(idx)].iov_base
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static inline void
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uio_iov_at_index(uio_t *uio, uint_t idx, void **base, uint64_t *len)
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{
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*base = uio_iovbase(uio, idx);
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*len = uio_iovlen(uio, idx);
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}
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static inline void
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uio_advance(uio_t *uio, size_t size)
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{
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uio->uio_resid -= size;
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uio->uio_loffset += size;
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}
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static inline offset_t
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uio_index_at_offset(uio_t *uio, offset_t off, uint_t *vec_idx)
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{
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*vec_idx = 0;
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while (*vec_idx < uio_iovcnt(uio) && off >= uio_iovlen(uio, *vec_idx)) {
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off -= uio_iovlen(uio, *vec_idx);
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(*vec_idx)++;
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}
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return (off);
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}
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#endif /* !_OPENSOLARIS_SYS_UIO_H_ */
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