1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2017 Rick Macklem
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <err.h>
33#include <getopt.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <unistd.h>
37#include <netdb.h>
38#include <arpa/inet.h>
39#include <netinet/in.h>
40#include <nfs/nfssvc.h>
41
42#include <fs/nfs/nfsproto.h>
43#include <fs/nfs/nfskpiport.h>
44#include <fs/nfs/nfs.h>
45
46static void usage(void);
47
48static struct option longopts[] = {
49	{ "force",	no_argument,	NULL,	'f'	},
50	{ NULL,		0,		NULL,	0	}
51};
52
53/*
54 * This program disables use of a DS mirror.  The "dspath" command line
55 * argument must be an exact match for the mounted-on path of the DS.
56 * It should be done before any forced dismount is performed on the path
57 * and should work even when the mount point is hung.
58 */
59int
60main(int argc, char *argv[])
61{
62	struct nfsd_pnfsd_args pnfsdarg;
63	int ch, force;
64
65	if (geteuid() != 0)
66		errx(1, "Must be run as root/su");
67	force = 0;
68	while ((ch = getopt_long(argc, argv, "f", longopts, NULL)) != -1) {
69		switch (ch) {
70		case 'f':
71			force = 1;
72			break;
73		default:
74			usage();
75		}
76	}
77	argc -= optind;
78	argv += optind;
79	if (argc != 1)
80		usage();
81
82	if (force != 0)
83		pnfsdarg.op = PNFSDOP_FORCEDELDS;
84	else
85		pnfsdarg.op = PNFSDOP_DELDSSERVER;
86	pnfsdarg.dspath = *argv;
87	if (nfssvc(NFSSVC_PNFSDS, &pnfsdarg) < 0)
88		err(1, "Can't kill %s", *argv);
89}
90
91static void
92usage(void)
93{
94
95	fprintf(stderr, "pnfsdsfile [-f] mounted-on-DS-dir\n");
96	exit(1);
97}
98
99