119 lines
4.4 KiB
C
119 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1982, 1986, 1993, 1994
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* The Regents of the University of California. 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)uio.h 8.5 (Berkeley) 2/22/94
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* $FreeBSD: head/sys/sys/uio.h 331621 2018-03-27 15:20:03Z brooks $
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*/
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#ifndef _SYS_UIO_H_
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#define _SYS_UIO_H_
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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#include <sys/_iovec.h>
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#include <sys/_uio.h>
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#ifndef _SSIZE_T_DECLARED
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typedef __ssize_t ssize_t;
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#define _SSIZE_T_DECLARED
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#endif
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#ifndef _OFF_T_DECLARED
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typedef __off_t off_t;
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#define _OFF_T_DECLARED
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#endif
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#ifdef _KERNEL
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struct uio {
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struct iovec *uio_iov; /* scatter/gather list */
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int uio_iovcnt; /* length of scatter/gather list */
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off_t uio_offset; /* offset in target object */
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ssize_t uio_resid; /* remaining bytes to process */
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enum uio_seg uio_segflg; /* address space */
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enum uio_rw uio_rw; /* operation */
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struct thread *uio_td; /* owner */
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};
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/*
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* Limits
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*
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* N.B.: UIO_MAXIOV must be no less than IOV_MAX from <sys/syslimits.h>
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* which in turn must be no less than _XOPEN_IOV_MAX from <limits.h>. If
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* we ever make this tunable (probably pointless), then IOV_MAX should be
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* removed from <sys/syslimits.h> and applications would be expected to use
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* sysconf(3) to find out the correct value, or else assume the worst
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* (_XOPEN_IOV_MAX). Perhaps UIO_MAXIOV should be simply defined as
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* IOV_MAX.
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*/
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#define UIO_MAXIOV 1024 /* max 1K of iov's */
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struct vm_object;
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struct vm_page;
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struct bus_dma_segment;
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struct uio *cloneuio(struct uio *uiop);
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int copyinfrom(const void * __restrict src, void * __restrict dst,
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size_t len, int seg);
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int copyiniov(const struct iovec *iovp, u_int iovcnt, struct iovec **iov,
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int error);
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int copyinstrfrom(const void * __restrict src, void * __restrict dst,
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size_t len, size_t * __restrict copied, int seg);
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int copyinuio(const struct iovec *iovp, u_int iovcnt, struct uio **uiop);
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int copyout_map(struct thread *td, vm_offset_t *addr, size_t sz);
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int copyout_unmap(struct thread *td, vm_offset_t addr, size_t sz);
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int physcopyin(void *src, vm_paddr_t dst, size_t len);
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int physcopyout(vm_paddr_t src, void *dst, size_t len);
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int physcopyin_vlist(struct bus_dma_segment *src, off_t offset,
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vm_paddr_t dst, size_t len);
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int physcopyout_vlist(vm_paddr_t src, struct bus_dma_segment *dst,
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off_t offset, size_t len);
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int uiomove(void *cp, int n, struct uio *uio);
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int uiomove_frombuf(void *buf, int buflen, struct uio *uio);
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int uiomove_fromphys(struct vm_page *ma[], vm_offset_t offset, int n,
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struct uio *uio);
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int uiomove_nofault(void *cp, int n, struct uio *uio);
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int uiomove_object(struct vm_object *obj, off_t obj_size, struct uio *uio);
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#else /* !_KERNEL */
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__BEGIN_DECLS
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ssize_t readv(int, const struct iovec *, int);
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ssize_t writev(int, const struct iovec *, int);
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#if __BSD_VISIBLE
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ssize_t preadv(int, const struct iovec *, int, off_t);
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ssize_t pwritev(int, const struct iovec *, int, off_t);
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#endif
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__END_DECLS
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#endif /* _KERNEL */
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#endif /* !_SYS_UIO_H_ */
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