sys/fs/tmpfs/tmpfs_fifoops.c

   1 /*      $NetBSD: tmpfs_fifoops.c,v 1.7 2008/04/28 20:24:02 martin Exp $ */
   2
   3 /*
   4  * Copyright (c) 2005 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
   9  * 2005 program.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * tmpfs vnode interface for named pipes.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: tmpfs_fifoops.c,v 1.7 2008/04/28 20:24:02 martin Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/vnode.h>
  42
  43 #include <fs/tmpfs/tmpfs.h>
  44 #include <fs/tmpfs/tmpfs_fifoops.h>
  45
  46 /* --------------------------------------------------------------------- */
  47
  48 /*
  49  * vnode operations vector used for fifos stored in a tmpfs file system.
  50  */
  51 int (**tmpfs_fifoop_p)(void *);
  52 const struct vnodeopv_entry_desc tmpfs_fifoop_entries[] = {
  53         { &vop_default_desc,            vn_default_error },
  54         { &vop_lookup_desc,             tmpfs_fifo_lookup },
  55         { &vop_create_desc,             tmpfs_fifo_create },
  56         { &vop_mknod_desc,              tmpfs_fifo_mknod },
  57         { &vop_open_desc,               tmpfs_fifo_open },
  58         { &vop_close_desc,              tmpfs_fifo_close },
  59         { &vop_access_desc,             tmpfs_fifo_access },
  60         { &vop_getattr_desc,            tmpfs_fifo_getattr },
  61         { &vop_setattr_desc,            tmpfs_fifo_setattr },
  62         { &vop_read_desc,               tmpfs_fifo_read },
  63         { &vop_write_desc,              tmpfs_fifo_write },
  64         { &vop_ioctl_desc,              tmpfs_fifo_ioctl },
  65         { &vop_fcntl_desc,              tmpfs_fifo_fcntl },
  66         { &vop_poll_desc,               tmpfs_fifo_poll },
  67         { &vop_kqfilter_desc,           tmpfs_fifo_kqfilter },
  68         { &vop_revoke_desc,             tmpfs_fifo_revoke },
  69         { &vop_mmap_desc,               tmpfs_fifo_mmap },
  70         { &vop_fsync_desc,              tmpfs_fifo_fsync },
  71         { &vop_seek_desc,               tmpfs_fifo_seek },
  72         { &vop_remove_desc,             tmpfs_fifo_remove },
  73         { &vop_link_desc,               tmpfs_fifo_link },
  74         { &vop_rename_desc,             tmpfs_fifo_rename },
  75         { &vop_mkdir_desc,              tmpfs_fifo_mkdir },
  76         { &vop_rmdir_desc,              tmpfs_fifo_rmdir },
  77         { &vop_symlink_desc,            tmpfs_fifo_symlink },
  78         { &vop_readdir_desc,            tmpfs_fifo_readdir },
  79         { &vop_readlink_desc,           tmpfs_fifo_readlink },
  80         { &vop_abortop_desc,            tmpfs_fifo_abortop },
  81         { &vop_inactive_desc,           tmpfs_fifo_inactive },
  82         { &vop_reclaim_desc,            tmpfs_fifo_reclaim },
  83         { &vop_lock_desc,               tmpfs_fifo_lock },
  84         { &vop_unlock_desc,             tmpfs_fifo_unlock },
  85         { &vop_bmap_desc,               tmpfs_fifo_bmap },
  86         { &vop_strategy_desc,           tmpfs_fifo_strategy },
  87         { &vop_print_desc,              tmpfs_fifo_print },
  88         { &vop_pathconf_desc,           tmpfs_fifo_pathconf },
  89         { &vop_islocked_desc,           tmpfs_fifo_islocked },
  90         { &vop_advlock_desc,            tmpfs_fifo_advlock },
  91         { &vop_bwrite_desc,             tmpfs_fifo_bwrite },
  92         { &vop_getpages_desc,           tmpfs_fifo_getpages },
  93         { &vop_putpages_desc,           tmpfs_fifo_putpages },
  94         { NULL, NULL }
  95 };
  96 const struct vnodeopv_desc tmpfs_fifoop_opv_desc =
  97         { &tmpfs_fifoop_p, tmpfs_fifoop_entries };
  98
  99 /* --------------------------------------------------------------------- */
 100
 101 int
 102 tmpfs_fifo_close(void *v)
 103 {
 104         struct vnode *vp = ((struct vop_close_args *)v)->a_vp;
 105
 106         int error;
 107
 108         tmpfs_update(vp, NULL, NULL, NULL, UPDATE_CLOSE);
 109         error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), v);
 110
 111         return error;
 112 }
 113
 114 /* --------------------------------------------------------------------- */
 115
 116 int
 117 tmpfs_fifo_read(void *v)
 118 {
 119         struct vnode *vp = ((struct vop_read_args *)v)->a_vp;
 120
 121         VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_ACCESSED;
 122         return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v);
 123 }
 124
 125 /* --------------------------------------------------------------------- */
 126
 127 int
 128 tmpfs_fifo_write(void *v)
 129 {
 130         struct vnode *vp = ((struct vop_write_args *)v)->a_vp;
 131
 132         VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_MODIFIED;
 133         return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v);
 134 }