bsd/miscfs/fifofs/fifo.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  24 /*
  25  * Copyright (c) 1991, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)fifo.h      8.3 (Berkeley) 8/10/94
  57  */
  58 #ifndef __FIFOFS_FOFO_H__
  59 #define __FIFOFS_FOFO_H__
  60
  61 #ifdef BSD_KERNEL_PRIVATE
  62
  63
  64 /*
  65  * This structure is associated with the FIFO vnode and stores
  66  * the state associated with the FIFO.
  67  */
  68 struct fifoinfo {
  69         unsigned int    fi_flags;
  70     struct socket   *fi_readsock;
  71     struct socket   *fi_writesock;
  72     long        fi_readers;
  73     long        fi_writers;
  74         unsigned int    fi_count;
  75 };
  76
  77 #define FIFO_INCREATE   1
  78 #define FIFO_CREATEWAIT 2
  79 #define FIFO_CREATED    4
  80
  81
  82 /*
  83  * Prototypes for fifo operations on vnodes.
  84  */
  85 int     fifo_ebadf(void *);
  86
  87 int     fifo_lookup (struct vnop_lookup_args *);
  88 #define fifo_create (int (*) (struct  vnop_create_args *))err_create
  89 #define fifo_mknod (int (*) (struct  vnop_mknod_args *))err_mknod
  90 int     fifo_open (struct vnop_open_args *);
  91 int     fifo_close (struct vnop_close_args *);
  92 int     fifo_close_internal (vnode_t, int, vfs_context_t, int);
  93 #define fifo_access (int (*) (struct  vnop_access_args *))fifo_ebadf
  94 #define fifo_getattr (int (*) (struct  vnop_getattr_args *))fifo_ebadf
  95 #define fifo_setattr (int (*) (struct  vnop_setattr_args *))fifo_ebadf
  96 int     fifo_read (struct vnop_read_args *);
  97 int     fifo_write (struct vnop_write_args *);
  98 int     fifo_ioctl (struct vnop_ioctl_args *);
  99 int     fifo_select (struct vnop_select_args *);
 100 #define fifo_revoke nop_revoke
 101 #define fifo_mmap (int (*) (struct  vnop_mmap_args *))err_mmap
 102 #define fifo_fsync (int (*) (struct  vnop_fsync_args *))nullop
 103 #define fifo_remove (int (*) (struct  vnop_remove_args *))err_remove
 104 #define fifo_link (int (*) (struct  vnop_link_args *))err_link
 105 #define fifo_rename (int (*) (struct  vnop_rename_args *))err_rename
 106 #define fifo_mkdir (int (*) (struct  vnop_mkdir_args *))err_mkdir
 107 #define fifo_rmdir (int (*) (struct  vnop_rmdir_args *))err_rmdir
 108 #define fifo_symlink (int (*) (struct  vnop_symlink_args *))err_symlink
 109 #define fifo_readdir (int (*) (struct  vnop_readdir_args *))err_readdir
 110 #define fifo_readlink (int (*) (struct  vnop_readlink_args *))err_readlink
 111 int     fifo_inactive (struct  vnop_inactive_args *);
 112 #define fifo_reclaim (int (*) (struct  vnop_reclaim_args *))nullop
 113 #define fifo_strategy (int (*) (struct  vnop_strategy_args *))err_strategy
 114 int     fifo_pathconf (struct vnop_pathconf_args *);
 115 int     fifo_advlock (struct vnop_advlock_args *);
 116 #define fifo_valloc (int (*) (struct  vnop_valloc_args *))err_valloc
 117 #define fifo_vfree (int (*) (struct  vnop_vfree_args *))err_vfree
 118 #define fifo_bwrite (int (*) (struct  vnop_bwrite_args *))nullop
 119 #define fifo_blktooff (int (*) (struct vnop_blktooff_args *))err_blktooff
 120
 121 #endif /* BSD_KERNEL_PRIVATE */
 122
 123 #endif /* __FIFOFS_FOFO_H__ */