1 /* $NetBSD: tmpfs_fifoops.c,v 1.5 2005/12/11 12:24:29 christos 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 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/filedesc.h> 41 #include <sys/proc.h> 42 #include <sys/vnode.h> 43 44 #include <vm/vm.h> 45 #include <vm/vm_object.h> 46 47 #include <fs/tmpfs/tmpfs.h> 48 #include <fs/tmpfs/tmpfs_fifoops.h> 49 #include <fs/tmpfs/tmpfs_vnops.h> 50 51 /* --------------------------------------------------------------------- */ 52 53 static int 54 tmpfs_fifo_kqfilter(struct vop_kqfilter_args *ap) 55 { 56 struct vnode *vp; 57 struct tmpfs_node *node; 58 59 vp = ap->a_vp; 60 node = VP_TO_TMPFS_NODE(vp); 61 62 switch (ap->a_kn->kn_filter){ 63 case EVFILT_READ: 64 node->tn_status |= TMPFS_NODE_ACCESSED; 65 break; 66 case EVFILT_WRITE: 67 node->tn_status |= TMPFS_NODE_MODIFIED; 68 break; 69 } 70 71 return fifo_specops.vop_kqfilter(ap); 72 } 73 74 /* --------------------------------------------------------------------- */ 75 76 static int 77 tmpfs_fifo_close(struct vop_close_args *v) 78 { 79 struct tmpfs_node *node; 80 node = VP_TO_TMPFS_NODE(v->a_vp); 81 node->tn_status |= TMPFS_NODE_ACCESSED; 82 83 tmpfs_update(v->a_vp); 84 return fifo_specops.vop_close(v); 85 } 86 87 /* 88 * vnode operations vector used for fifos stored in a tmpfs file system. 89 */ 90 struct vop_vector tmpfs_fifoop_entries = { 91 .vop_default = &fifo_specops, 92 .vop_close = tmpfs_fifo_close, 93 .vop_reclaim = tmpfs_reclaim, 94 .vop_access = tmpfs_access, 95 .vop_getattr = tmpfs_getattr, 96 .vop_setattr = tmpfs_setattr, 97 .vop_kqfilter = tmpfs_fifo_kqfilter, 98 }; 99 100