uio_impl.h

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    1 /*
    2  * CDDL HEADER START
    3  *
    4  * The contents of this file are subject to the terms of the
    5  * Common Development and Distribution License (the "License").
    6  * You may not use this file except in compliance with the License.
    7  *
    8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
    9  * or https://opensource.org/licenses/CDDL-1.0.
   10  * See the License for the specific language governing permissions
   11  * and limitations under the License.
   12  *
   13  * When distributing Covered Code, include this CDDL HEADER in each
   14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
   15  * If applicable, add the following below this CDDL HEADER, with the
   16  * fields enclosed by brackets "[]" replaced with your own identifying
   17  * information: Portions Copyright [yyyy] [name of copyright owner]
   18  *
   19  * CDDL HEADER END
   20  */
   21 /*
   22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   23  * Use is subject to license terms.
   24  */
   25 
   26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
   27 /*        All Rights Reserved   */
   28 
   29 /*
   30  * University Copyright- Copyright (c) 1982, 1986, 1988
   31  * The Regents of the University of California
   32  * All Rights Reserved
   33  *
   34  * University Acknowledgment- Portions of this document are derived from
   35  * software developed by the University of California, Berkeley, and its
   36  * contributors.
   37  */
   38 
   39 #ifndef _SYS_UIO_IMPL_H
   40 #define _SYS_UIO_IMPL_H
   41 
   42 #include <sys/uio.h>
   43 
   44 extern int zfs_uiomove(void *, size_t, zfs_uio_rw_t, zfs_uio_t *);
   45 extern int zfs_uiocopy(void *, size_t, zfs_uio_rw_t, zfs_uio_t *, size_t *);
   46 extern void zfs_uioskip(zfs_uio_t *, size_t);
   47 
   48 static inline void
   49 zfs_uio_iov_at_index(zfs_uio_t *uio, uint_t idx, void **base, uint64_t *len)
   50 {
   51         *base = zfs_uio_iovbase(uio, idx);
   52         *len = zfs_uio_iovlen(uio, idx);
   53 }
   54 
   55 static inline offset_t
   56 zfs_uio_index_at_offset(zfs_uio_t *uio, offset_t off, uint_t *vec_idx)
   57 {
   58         *vec_idx = 0;
   59         while (*vec_idx < zfs_uio_iovcnt(uio) &&
   60             off >= zfs_uio_iovlen(uio, *vec_idx)) {
   61                 off -= zfs_uio_iovlen(uio, *vec_idx);
   62                 (*vec_idx)++;
   63         }
   64 
   65         return (off);
   66 }
   67 
   68 #endif  /* _SYS_UIO_IMPL_H */

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/sys/uio_impl.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/uio_impl.h