The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/uio.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*
    2  * Copyright (c) 1982, 1986, 1993, 1994
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)uio.h       8.5 (Berkeley) 2/22/94
   34  * $FreeBSD: src/sys/sys/uio.h,v 1.11.2.1 2001/09/28 16:58:35 dillon Exp $
   35  */
   36 
   37 #ifndef _SYS_UIO_H_
   38 #define _SYS_UIO_H_
   39 
   40 #include <sys/_iovec.h>
   41 
   42 #ifndef _SYS_TYPES_H_
   43 #include <sys/types.h>
   44 #endif
   45 #ifndef _SYS_PARAM_H_
   46 #include <sys/param.h>
   47 #endif
   48 #ifndef _SYS_MALLOC_H_
   49 #include <sys/malloc.h>         /* Needed to inline iovec_free(). */
   50 #endif
   51 
   52 enum    uio_rw { UIO_READ, UIO_WRITE };
   53 
   54 /* Segment flag values. */
   55 enum uio_seg {
   56         UIO_USERSPACE,          /* from user data space */
   57         UIO_SYSSPACE,           /* from system space */
   58         UIO_NOCOPY              /* don't copy, already in object */
   59 };
   60 
   61 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
   62 
   63 /*
   64  * uio_td is primarily used for USERSPACE transfers, but some devices
   65  * like ttys may also use it to get at the process.
   66  *
   67  * NOTE: uio_resid: Previously used int and FreeBSD decided to use ssize_t,
   68  *       but after reviewing use cases and in particular the fact that the
   69  *       iov uses an unsigned quantity, DragonFly will use the (unsigned)
   70  *       size_t.
   71  */
   72 struct buf;
   73 
   74 struct uio {
   75         struct  iovec *uio_iov;
   76         int     uio_iovcnt;
   77         off_t   uio_offset;
   78         size_t  uio_resid;
   79         enum    uio_seg uio_segflg;
   80         enum    uio_rw uio_rw;
   81         struct  thread *uio_td;
   82 };
   83 
   84 /*
   85  * Limits
   86  */
   87 #define UIO_MAXIOV      1024            /* max 1K of iov's */
   88 #define UIO_SMALLIOV    8               /* 8 on stack, else malloc */
   89 
   90 #endif
   91 
   92 #if defined(_KERNEL)
   93 
   94 struct vm_object;
   95 struct vm_page;
   96 
   97 int     uiomove (caddr_t, size_t, struct uio *);
   98 int     uiomove_nofault (caddr_t, size_t, struct uio *);
   99 int     uiomovebp (struct buf *, caddr_t, size_t, struct uio *);
  100 int     uiomovez (size_t, struct uio *);
  101 int     uiomove_frombuf (void *buf, size_t buflen, struct uio *uio);
  102 int     uiomove_fromphys(struct vm_page *ma[], vm_offset_t offset,
  103                             size_t n, struct uio *uio);
  104 int     uioread (int, struct uio *, struct vm_object *, int *);
  105 int     iovec_copyin(struct iovec *, struct iovec **, struct iovec *,
  106                             size_t, size_t *);
  107 
  108 /*
  109  * MPSAFE
  110  */
  111 static __inline void
  112 iovec_free(struct iovec **kiov, struct iovec *siov)
  113 {
  114         if (*kiov != siov) {
  115                 kfree(*kiov, M_IOV);
  116                 *kiov = NULL;
  117         }
  118 }
  119 
  120 #else /* !_KERNEL */
  121 
  122 #include <sys/cdefs.h>
  123 
  124 __BEGIN_DECLS
  125 ssize_t readv(int, const struct iovec *, int);
  126 ssize_t writev(int, const struct iovec *, int);
  127 ssize_t preadv(int, const struct iovec *, int, off_t);
  128 ssize_t pwritev(int, const struct iovec *, int, off_t);
  129 __END_DECLS
  130 
  131 #endif /* _KERNEL */
  132 
  133 #endif /* !_SYS_UIO_H_ */

Cache object: 62ec282d89d147ee1cc7c8147b052b8e


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.