1 /* $NetBSD: tmpfs.c,v 1.2 2006/02/16 14:58:35 jmmv 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 1.2 2006/02/16 14:58:35 jmmv Exp $"); 38 39 #define __POOL_EXPOSE 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/proc.h> 44 #include <sys/user.h> 45 #include <sys/stat.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 49 #include <fs/tmpfs/tmpfs.h> 50 51 #include <err.h> 52 #include <kvm.h> 53 #include "fstat.h" 54 55 int 56 tmpfs_filestat(struct vnode *vp, struct filestat *fsp) 57 { 58 struct tmpfs_node tn; 59 struct mount mt; 60 61 if (!KVM_READ(VP_TO_TMPFS_NODE(vp), &tn, sizeof(tn))) { 62 dprintf("can't read tmpfs_node at %p for pid %d", 63 VP_TO_TMPFS_NODE(vp), Pid); 64 return 0; 65 } 66 if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) { 67 dprintf("can't read mount at %p for pid %d", 68 vp->v_mount, Pid); 69 return 0; 70 } 71 72 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0]; 73 fsp->fileid = (long)tn.tn_id; 74 fsp->mode = tn.tn_mode | getftype(vp->v_type); 75 fsp->size = tn.tn_size; 76 switch (tn.tn_type) { 77 case VBLK: 78 case VCHR: 79 fsp->rdev = tn.tn_spec.tn_dev.tn_rdev; 80 break; 81 default: 82 fsp->rdev = 0; 83 break; 84 } 85 86 return 1; 87 } 88