1 /* $NetBSD: zfs.c,v 1.1 2022/06/19 11:31:19 simonb Exp $ */
2
3 /*-
4 * Copyright (c) 2022 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Simon Burge.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: zfs.c,v 1.1 2022/06/19 11:31:19 simonb Exp $");
34
35 #include <sys/param.h>
36 #include <sys/time.h>
37 #include <sys/vnode.h>
38 #define __EXPOSE_MOUNT
39 #include <sys/mount.h>
40
41 #include "zfs_znode.h"
42
43 #include <kvm.h>
44 #include <err.h>
45 #include "fstat.h"
46
47 int
zfs_filestat(struct vnode * vp,struct filestat * fsp)48 zfs_filestat(struct vnode *vp, struct filestat *fsp)
49 {
50 znode_t inode;
51 struct mount mt;
52
53 if (!KVM_READ(VTOZ(vp), &inode, sizeof (inode))) {
54 dprintf("can't read inode at %p for pid %d", VTOZ(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 * XXX: fsid should be something like
64 * ((struct zfsvfs *)vp->v_mount->mnt_data)->
65 * z_os->os_ds_dataset->ds_fsid_guid
66 * but ZFS headers are pretty much impossible to include
67 * from userland.
68 */
69 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0];
70 fsp->fileid = inode.z_id;
71 fsp->mode = inode.z_mode;
72 fsp->size = inode.z_size;
73 fsp->rdev = 0;
74 return 1;
75 }
76