ld_at_virtio.c revision 1.4 
1/*	$NetBSD: ld_at_virtio.c,v 1.4 2017/05/10 06:22:15 sevan 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#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: ld_at_virtio.c,v 1.4 2017/05/10 06:22:15 sevan Exp $");
30
31#include <sys/param.h>
32#include <sys/conf.h>
33#include <sys/device.h>
34#include <sys/bus.h>
35#include <sys/stat.h>
36#include <sys/disklabel.h>
37
38#include <rump-sys/kern.h>
39#include <rump-sys/vfs.h>
40
41#include "ioconf.c"
42
43RUMP_COMPONENT(RUMP_COMPONENT_DEV)
44{
45
46	config_init_component(cfdriver_ioconf_ld_virtio,
47	    cfattach_ioconf_ld_virtio, cfdata_ioconf_ld_virtio);
48}
49
50/*
51 * Pseudo-devfs.  Since creating device nodes is non-free, don't
52 * speculatively create hundreds of them (= milliseconds slower
53 * bootstrap).  Instead, after the probe is done, see which units
54 * were found and create nodes only for them.
55 */
56RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT)
57{
58	extern const struct bdevsw ld_bdevsw;
59	extern const struct cdevsw ld_cdevsw;
60	devmajor_t bmaj = -1, cmaj = -1;
61	int error, i;
62
63	if ((error = devsw_attach("ld", &ld_bdevsw, &bmaj,
64	    &ld_cdevsw, &cmaj)) != 0)
65		panic("cannot attach ld: %d", error);
66
67	for (i = 0; i < 10; i++) {
68		char bbase[] = "/dev/ldX";
69		char rbase[] = "/dev/rldX";
70
71		if (device_lookup(&ld_cd, i) == NULL)
72			break;
73
74		bbase[sizeof(bbase)-2] = '0' + i;
75		rbase[sizeof(rbase)-2] = '0' + i;
76
77		if ((error = rump_vfs_makedevnodes(S_IFBLK, bbase, 'a',
78		    bmaj, DISKMINOR(i, 0), 5)) != 0)
79			panic("cannot create cooked ld dev nodes: %d", error);
80		if ((error = rump_vfs_makedevnodes(S_IFCHR, rbase, 'a',
81		    cmaj, DISKMINOR(i, 0), 5)) != 0)
82			panic("cannot create raw ld dev nodes: %d", error);
83	}
84}
85