1/*	$NetBSD: rump_nqmfs.c,v 1.2 2010/03/31 14:49:02 pooka Exp $	*/
2
3/*
4 * Copyright (c) 2010 Antti Kantee.  All Rights Reserved.
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 ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * 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 OR
21 * 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 * Not Quite MFS.  Instead of allocating memory and creating a FFS file system
30 * there, mmap a file (which should contain ffs) and use that as the backend.
31 * You can also give a newly created image as the file ...
32 */
33
34#include <sys/types.h>
35#include <sys/mman.h>
36#include <sys/mount.h>
37#include <sys/stat.h>
38
39#include <ufs/ufs/ufsmount.h>
40
41#include <err.h>
42#include <mntopts.h>
43#include <puffs.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <unistd.h>
47
48#include <rump/p2k.h>
49#include <rump/ukfs.h>
50
51const struct mntopt mopts[] = {
52	MOPT_STDOPTS,
53	MOPT_NULL,
54};
55
56static void
57usage(void)
58{
59
60	fprintf(stderr, "%s: [-o args] fspec mountpoint\n", getprogname());
61	exit(1);
62}
63
64static struct mfs_args args;
65static char *mntpath, *mntfile;
66static int mntflags, altflags;
67
68int
69main(int argc, char *argv[])
70{
71	struct stat sb;
72	mntoptparse_t mp;
73	void *membase;
74	int ch, fd, rdonly, shared;
75
76	setprogname(argv[0]);
77	puffs_unmountonsignal(SIGINT, true);
78	puffs_unmountonsignal(SIGTERM, true);
79
80	shared = mntflags = altflags = 0;
81
82	memset(&args, 0, sizeof(args));
83	while ((ch = getopt(argc, argv, "o:s")) != -1) {
84		switch (ch) {
85		case 'o':
86			mp = getmntopts(optarg, mopts, &mntflags, &altflags);
87			if (mp == NULL)
88				err(1, "getmntopts");
89			freemntopts(mp);
90			break;
91		case 's':
92			shared = 1;
93			break;
94		default:
95			usage();
96			break;
97		}
98	}
99	argc -= optind;
100	argv += optind;
101
102	if (argc != 2)
103		usage();
104	mntfile = argv[0];
105	mntpath = argv[1];
106	rdonly = mntflags & MNT_RDONLY;
107
108	if (stat(mntfile, &sb) == -1)
109		err(1, "stat fspec");
110	if (!S_ISREG(sb.st_mode))
111		errx(1, "fspec must be a regular file");
112
113	fd = open(mntfile, rdonly ? O_RDONLY: O_RDWR);
114	if (fd == -1)
115		err(1, "open fspec");
116
117	membase = mmap(NULL, sb.st_size, PROT_READ | (rdonly ? 0 : PROT_WRITE),
118	    MAP_FILE | (shared ? MAP_SHARED : MAP_PRIVATE), fd, 0);
119	if (membase == MAP_FAILED)
120		err(1, "cannot mmap fspec");
121
122	args.fspec = mntfile;
123	args.base = membase;
124	args.size = sb.st_size;
125
126	if (p2k_run_fs(MOUNT_MFS, "/swabbie", mntpath,
127	    0, &args, sizeof(args), 0) == -1)
128		err(1, "p2k");
129
130	return 0;
131}
132