1 /* $NetBSD: tmpfs.c,v 1.11 2017/06/09 00:13:29 chs 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 1.11 2017/06/09 00:13:29 chs 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 #define __EXPOSE_MOUNT 39 #include <sys/mount.h> 40 41 #include <fs/tmpfs/tmpfs.h> 42 43 #include <err.h> 44 #include <kvm.h> 45 #include "fstat.h" 46 47 int 48 tmpfs_filestat(struct vnode *vp, struct filestat *fsp) 49 { 50 struct tmpfs_node tn; 51 struct mount mt; 52 53 if (!KVM_READ(VP_TO_TMPFS_NODE(vp), &tn, sizeof(tn))) { 54 dprintf("can't read tmpfs_node at %p for pid %d", 55 VP_TO_TMPFS_NODE(vp), Pid); 56 return 0; 57 } 58 if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) { 59 dprintf("can't read mount at %p for pid %d", 60 vp->v_mount, Pid); 61 return 0; 62 } 63 64 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0]; 65 fsp->fileid = tn.tn_id; 66 fsp->mode = tn.tn_mode | getftype(vp->v_type); 67 fsp->size = tn.tn_size; 68 switch (tn.tn_type) { 69 case VBLK: 70 case VCHR: 71 fsp->rdev = tn.tn_spec.tn_dev.tn_rdev; 72 break; 73 default: 74 fsp->rdev = 0; 75 break; 76 } 77 78 return 1; 79 } 80