1 /* $NetBSD: tmpfs.c,v 1.4 2006/05/27 09:14:03 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __RCSID("$NetBSD: tmpfs.c,v 1.4 2006/05/27 09:14:03 yamt Exp $"); 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/time.h> 42 #include <sys/proc.h> 43 #include <sys/stat.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 47 #include <fs/tmpfs/tmpfs.h> 48 49 #include <err.h> 50 #include <kvm.h> 51 #include "fstat.h" 52 53 int 54 tmpfs_filestat(struct vnode *vp, struct filestat *fsp) 55 { 56 struct tmpfs_node tn; 57 struct mount mt; 58 59 if (!KVM_READ(VP_TO_TMPFS_NODE(vp), &tn, sizeof(tn))) { 60 dprintf("can't read tmpfs_node at %p for pid %d", 61 VP_TO_TMPFS_NODE(vp), Pid); 62 return 0; 63 } 64 if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) { 65 dprintf("can't read mount at %p for pid %d", 66 vp->v_mount, Pid); 67 return 0; 68 } 69 70 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0]; 71 fsp->fileid = (long)tn.tn_id; 72 fsp->mode = tn.tn_mode | getftype(vp->v_type); 73 fsp->size = tn.tn_size; 74 switch (tn.tn_type) { 75 case VBLK: 76 case VCHR: 77 fsp->rdev = tn.tn_spec.tn_dev.tn_rdev; 78 break; 79 default: 80 fsp->rdev = 0; 81 break; 82 } 83 84 return 1; 85 } 86