108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/*
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* University Copyright- Copyright (c) 1982, 1986, 1988
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* The Regents of the University of California
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* All Rights Reserved
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*
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* University Acknowledgment- Portions of this document are derived from
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* software developed by the University of California, Berkeley, and its
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* contributors.
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*/
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#ifndef _SYS_UIO_IMPL_H
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#define _SYS_UIO_IMPL_H
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#include <sys/uio.h>
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#include <sys/sysmacros.h>
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extern int zfs_uiomove(void *, size_t, zfs_uio_rw_t, zfs_uio_t *);
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extern int zfs_uiocopy(void *, size_t, zfs_uio_rw_t, zfs_uio_t *, size_t *);
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extern void zfs_uioskip(zfs_uio_t *, size_t);
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extern void zfs_uio_free_dio_pages(zfs_uio_t *, zfs_uio_rw_t);
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extern int zfs_uio_get_dio_pages_alloc(zfs_uio_t *, zfs_uio_rw_t);
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extern boolean_t zfs_uio_page_aligned(zfs_uio_t *);
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#ifdef _KERNEL
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static inline boolean_t
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zfs_dio_page_aligned(void *buf)
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{
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return ((((uintptr_t)(buf) & (PAGESIZE - 1)) == 0) ?
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B_TRUE : B_FALSE);
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}
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#endif
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static inline boolean_t
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zfs_dio_offset_aligned(uint64_t offset, uint64_t blksz)
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{
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return (IS_P2ALIGNED(offset, blksz));
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}
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static inline boolean_t
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zfs_dio_size_aligned(uint64_t size, uint64_t blksz)
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{
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return ((size % blksz) == 0);
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}
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static inline boolean_t
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zfs_dio_aligned(uint64_t offset, uint64_t size, uint64_t blksz)
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{
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return (zfs_dio_offset_aligned(offset, blksz) &&
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zfs_dio_size_aligned(size, blksz));
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}
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static inline boolean_t
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zfs_uio_aligned(zfs_uio_t *uio, uint64_t blksz)
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{
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return (zfs_dio_aligned(zfs_uio_offset(uio), zfs_uio_resid(uio),
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blksz));
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}
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static inline void
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zfs_uio_iov_at_index(zfs_uio_t *uio, uint_t idx, void **base, uint64_t *len)
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{
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*base = zfs_uio_iovbase(uio, idx);
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*len = zfs_uio_iovlen(uio, idx);
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}
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static inline offset_t
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zfs_uio_index_at_offset(zfs_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 < zfs_uio_iovcnt(uio) &&
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off >= zfs_uio_iovlen(uio, *vec_idx)) {
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off -= zfs_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 /* _SYS_UIO_IMPL_H */
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