100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/* $NetBSD: tmpfs_fifoops.c,v 1.5 2005/12/11 12:24:29 christos Exp $ */
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/*-
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Julio M. Merino Vidal, developed as part of Google's Summer of Code
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* 2005 program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* tmpfs vnode interface for named pipes.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/filedesc.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <fs/tmpfs/tmpfs.h>
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#include <fs/tmpfs/tmpfs_fifoops.h>
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#include <fs/tmpfs/tmpfs_vnops.h>
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/* --------------------------------------------------------------------- */
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static int
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tmpfs_fifo_kqfilter(struct vop_kqfilter_args *ap)
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{
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struct vnode *vp;
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struct tmpfs_node *node;
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vp = ap->a_vp;
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node = VP_TO_TMPFS_NODE(vp);
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switch (ap->a_kn->kn_filter){
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case EVFILT_READ:
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node->tn_status |= TMPFS_NODE_ACCESSED;
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break;
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case EVFILT_WRITE:
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node->tn_status |= TMPFS_NODE_MODIFIED;
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break;
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}
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return fifo_specops.vop_kqfilter(ap);
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}
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/* --------------------------------------------------------------------- */
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static int
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tmpfs_fifo_close(struct vop_close_args *v)
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{
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struct tmpfs_node *node;
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node = VP_TO_TMPFS_NODE(v->a_vp);
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node->tn_status |= TMPFS_NODE_ACCESSED;
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tmpfs_update(v->a_vp);
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return fifo_specops.vop_close(v);
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}
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/*
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* vnode operations vector used for fifos stored in a tmpfs file system.
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*/
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struct vop_vector tmpfs_fifoop_entries = {
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.vop_default = &fifo_specops,
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.vop_close = tmpfs_fifo_close,
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.vop_reclaim = tmpfs_reclaim,
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.vop_access = tmpfs_access,
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.vop_getattr = tmpfs_getattr,
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.vop_setattr = tmpfs_setattr,
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.vop_kqfilter = tmpfs_fifo_kqfilter,
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};
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