1/* $NetBSD: tmpfs_fifoops.c,v 1.15 2021/07/19 01:30:25 dholland 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 1.15 2021/07/19 01:30:25 dholland 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 * vnode operations vector used for fifos stored in a tmpfs file system. 48 */ 49int (**tmpfs_fifoop_p)(void *); 50const struct vnodeopv_entry_desc tmpfs_fifoop_entries[] = { 51 { &vop_default_desc, vn_default_error }, 52 GENFS_FIFOOP_ENTRIES, 53 { &vop_close_desc, tmpfs_fifo_close }, 54 { &vop_access_desc, tmpfs_access }, 55 { &vop_accessx_desc, genfs_accessx }, 56 { &vop_getattr_desc, tmpfs_getattr }, 57 { &vop_setattr_desc, tmpfs_setattr }, 58 { &vop_read_desc, tmpfs_fifo_read }, 59 { &vop_write_desc, tmpfs_fifo_write }, 60 { &vop_fcntl_desc, genfs_fcntl }, 61 { &vop_fsync_desc, vn_fifo_bypass }, 62 { &vop_inactive_desc, tmpfs_inactive }, 63 { &vop_reclaim_desc, tmpfs_reclaim }, 64 { &vop_lock_desc, genfs_lock }, 65 { &vop_unlock_desc, genfs_unlock }, 66 { &vop_strategy_desc, vn_fifo_bypass }, 67 { &vop_print_desc, tmpfs_print }, 68 { &vop_islocked_desc, genfs_islocked }, 69 { &vop_bwrite_desc, genfs_nullop }, 70 { NULL, NULL } 71}; 72 73const struct vnodeopv_desc tmpfs_fifoop_opv_desc = { 74 &tmpfs_fifoop_p, tmpfs_fifoop_entries 75}; 76 77int 78tmpfs_fifo_close(void *v) 79{ 80 struct vop_close_args /* { 81 struct vnode *a_vp; 82 int a_fflag; 83 kauth_cred_t a_cred; 84 } */ *ap __unused = v; 85 86 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), v); 87} 88 89int 90tmpfs_fifo_read(void *v) 91{ 92 struct vop_read_args /* { 93 struct vnode *a_vp; 94 struct uio *a_uio; 95 int a_ioflag; 96 kauth_cred_t a_cred; 97 } */ *ap = v; 98 vnode_t *vp = ap->a_vp; 99 100 tmpfs_update(vp, TMPFS_UPDATE_ATIME); 101 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 102} 103 104int 105tmpfs_fifo_write(void *v) 106{ 107 struct vop_write_args /* { 108 struct vnode *a_vp; 109 struct uio *a_uio; 110 int a_ioflag; 111 kauth_cred_t a_cred; 112 } */ *ap = v; 113 vnode_t *vp = ap->a_vp; 114 115 tmpfs_update(vp, TMPFS_UPDATE_MTIME); 116 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 117} 118