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
tmpfs_filestat(struct vnode * vp,struct filestat * fsp)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