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