bsd/miscfs/fdesc/fdesc.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1992, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * This code is derived from software donated to Berkeley by
  31  * Jan-Simon Pendry.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)fdesc.h     8.6 (Berkeley) 8/20/94
  62  *
  63  * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
  64  */
  65 #ifndef __FDESC_FDESC_H__
  66 #define __FDESC_FDESC_H__
  67
  68 #include  <sys/appleapiopts.h>
  69
  70 #ifdef __APPLE_API_PRIVATE
  71 #ifdef KERNEL
  72 struct fdescmount {
  73         struct vnode    *f_root;        /* Root node */
  74 };
  75
  76 #define FD_ROOT         2
  77 #define FD_DEVFD        3
  78 #define FD_STDIN        4
  79 #define FD_STDOUT       5
  80 #define FD_STDERR       6
  81 #define FD_DESC         8
  82 #define FD_MAX          12
  83
  84 typedef enum {
  85         Froot,
  86         Fdevfd,
  87         Fdesc,
  88         Flink,
  89 } fdntype;
  90
  91 struct fdescnode {
  92         LIST_ENTRY(fdescnode) fd_hash;  /* Hash list */
  93         struct vnode    *fd_vnode;      /* Back ptr to vnode */
  94         fdntype         fd_type;        /* Type of this node */
  95         unsigned        fd_fd;          /* Fd to be dup'ed */
  96         char            *fd_link;       /* Link to fd/n */
  97         int             fd_ix;          /* filesystem index */
  98 };
  99
 100 #define VFSTOFDESC(mp)  ((struct fdescmount *)((mp)->mnt_data))
 101 #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
 102
 103 extern int fdesc_init __P((struct vfsconf *));
 104 extern int fdesc_root __P((struct mount *, struct vnode **));
 105 extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
 106 extern int (**fdesc_vnodeop_p)(void *);
 107 extern struct vfsops fdesc_vfsops;
 108 #endif /* KERNEL */
 109 #endif /* __APPLE_API_PRIVATE */
 110 #endif /* __FDESC_FDESC_H__ */