NetBSD/sys/fs/tmpfs/tmpfs_fifoops.c

135 lines
4.8 KiB
C

/* $NetBSD: tmpfs_fifoops.c,v 1.8 2008/06/19 23:57:22 skd Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Julio M. Merino Vidal, developed as part of Google's Summer of Code
* 2005 program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* tmpfs vnode interface for named pipes.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tmpfs_fifoops.c,v 1.8 2008/06/19 23:57:22 skd Exp $");
#include <sys/param.h>
#include <sys/vnode.h>
#include <fs/tmpfs/tmpfs.h>
#include <fs/tmpfs/tmpfs_fifoops.h>
/* --------------------------------------------------------------------- */
/*
* vnode operations vector used for fifos stored in a tmpfs file system.
*/
int (**tmpfs_fifoop_p)(void *);
const struct vnodeopv_entry_desc tmpfs_fifoop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, tmpfs_fifo_lookup },
{ &vop_create_desc, tmpfs_fifo_create },
{ &vop_mknod_desc, tmpfs_fifo_mknod },
{ &vop_open_desc, tmpfs_fifo_open },
{ &vop_close_desc, tmpfs_fifo_close },
{ &vop_access_desc, tmpfs_fifo_access },
{ &vop_getattr_desc, tmpfs_fifo_getattr },
{ &vop_setattr_desc, tmpfs_fifo_setattr },
{ &vop_read_desc, tmpfs_fifo_read },
{ &vop_write_desc, tmpfs_fifo_write },
{ &vop_ioctl_desc, tmpfs_fifo_ioctl },
{ &vop_fcntl_desc, tmpfs_fifo_fcntl },
{ &vop_poll_desc, tmpfs_fifo_poll },
{ &vop_kqfilter_desc, tmpfs_fifo_kqfilter },
{ &vop_revoke_desc, tmpfs_fifo_revoke },
{ &vop_mmap_desc, tmpfs_fifo_mmap },
{ &vop_fsync_desc, tmpfs_fifo_fsync },
{ &vop_seek_desc, tmpfs_fifo_seek },
{ &vop_remove_desc, tmpfs_fifo_remove },
{ &vop_link_desc, tmpfs_fifo_link },
{ &vop_rename_desc, tmpfs_fifo_rename },
{ &vop_mkdir_desc, tmpfs_fifo_mkdir },
{ &vop_rmdir_desc, tmpfs_fifo_rmdir },
{ &vop_symlink_desc, tmpfs_fifo_symlink },
{ &vop_readdir_desc, tmpfs_fifo_readdir },
{ &vop_readlink_desc, tmpfs_fifo_readlink },
{ &vop_abortop_desc, tmpfs_fifo_abortop },
{ &vop_inactive_desc, tmpfs_fifo_inactive },
{ &vop_reclaim_desc, tmpfs_fifo_reclaim },
{ &vop_lock_desc, tmpfs_fifo_lock },
{ &vop_unlock_desc, tmpfs_fifo_unlock },
{ &vop_bmap_desc, tmpfs_fifo_bmap },
{ &vop_strategy_desc, tmpfs_fifo_strategy },
{ &vop_print_desc, tmpfs_fifo_print },
{ &vop_pathconf_desc, tmpfs_fifo_pathconf },
{ &vop_islocked_desc, tmpfs_fifo_islocked },
{ &vop_advlock_desc, tmpfs_fifo_advlock },
{ &vop_bwrite_desc, tmpfs_fifo_bwrite },
{ &vop_getpages_desc, tmpfs_fifo_getpages },
{ &vop_putpages_desc, tmpfs_fifo_putpages },
{ NULL, NULL }
};
const struct vnodeopv_desc tmpfs_fifoop_opv_desc =
{ &tmpfs_fifoop_p, tmpfs_fifoop_entries };
/* --------------------------------------------------------------------- */
int
tmpfs_fifo_close(void *v)
{
struct vnode *vp = ((struct vop_close_args *)v)->a_vp;
int error;
tmpfs_update(vp, NULL, NULL, NULL, UPDATE_CLOSE);
error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), v);
return error;
}
/* --------------------------------------------------------------------- */
int
tmpfs_fifo_read(void *v)
{
struct vnode *vp = ((struct vop_read_args *)v)->a_vp;
VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_ACCESSED;
return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v);
}
/* --------------------------------------------------------------------- */
int
tmpfs_fifo_write(void *v)
{
struct vnode *vp = ((struct vop_write_args *)v)->a_vp;
VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_MODIFIED;
return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v);
}