bsd/miscfs/fdesc/fdesc.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1992, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * This code is derived from software donated to Berkeley by
  28  * Jan-Simon Pendry.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)fdesc.h     8.6 (Berkeley) 8/20/94
  59  *
  60  * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
  61  */
  62
  63 #ifdef KERNEL
  64 struct fdescmount {
  65         struct vnode    *f_root;        /* Root node */
  66 };
  67
  68 #define FD_ROOT         2
  69 #define FD_DEVFD        3
  70 #define FD_STDIN        4
  71 #define FD_STDOUT       5
  72 #define FD_STDERR       6
  73 #define FD_CTTY         7
  74 #define FD_DESC         8
  75 #define FD_MAX          12
  76
  77 typedef enum {
  78         Froot,
  79         Fdevfd,
  80         Fdesc,
  81         Flink,
  82         Fctty
  83 } fdntype;
  84
  85 struct fdescnode {
  86         LIST_ENTRY(fdescnode) fd_hash;  /* Hash list */
  87         struct vnode    *fd_vnode;      /* Back ptr to vnode */
  88         fdntype         fd_type;        /* Type of this node */
  89         unsigned        fd_fd;          /* Fd to be dup'ed */
  90         char            *fd_link;       /* Link to fd/n */
  91         int             fd_ix;          /* filesystem index */
  92 };
  93
  94 #define VFSTOFDESC(mp)  ((struct fdescmount *)((mp)->mnt_data))
  95 #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
  96
  97 extern dev_t devctty;
  98 extern int fdesc_init __P((struct vfsconf *));
  99 extern int fdesc_root __P((struct mount *, struct vnode **));
 100 extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
 101 extern int (**fdesc_vnodeop_p)(void *);
 102 extern struct vfsops fdesc_vfsops;
 103 #endif /* KERNEL */