1 /* $NetBSD: tmpfs.c,v 1.8 2009/04/12 06:36:12 lukem 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __RCSID("$NetBSD: tmpfs.c,v 1.8 2009/04/12 06:36:12 lukem Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/time.h> 35 #include <sys/proc.h> 36 #include <sys/stat.h> 37 #include <sys/vnode.h> 38 #include <sys/mount.h> 39 40 #include <fs/tmpfs/tmpfs.h> 41 42 #include <err.h> 43 #include <kvm.h> 44 #include "fstat.h" 45 46 int 47 tmpfs_filestat(struct vnode *vp, struct filestat *fsp) 48 { 49 struct tmpfs_node tn; 50 struct mount mt; 51 52 if (!KVM_READ(VP_TO_TMPFS_NODE(vp), &tn, sizeof(tn))) { 53 dprintf("can't read tmpfs_node at %p for pid %d", 54 VP_TO_TMPFS_NODE(vp), Pid); 55 return 0; 56 } 57 if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) { 58 dprintf("can't read mount at %p for pid %d", 59 vp->v_mount, Pid); 60 return 0; 61 } 62 63 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0]; 64 fsp->fileid = tn.tn_id; 65 fsp->mode = tn.tn_mode | getftype(vp->v_type); 66 fsp->size = tn.tn_size; 67 switch (tn.tn_type) { 68 case VBLK: 69 case VCHR: 70 fsp->rdev = tn.tn_spec.tn_dev.tn_rdev; 71 break; 72 default: 73 fsp->rdev = 0; 74 break; 75 } 76 77 return 1; 78 } 79