1 /* $NetBSD: ld_at_virtio.c,v 1.5 2022/03/31 19:30:18 pgoyette 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 1.5 2022/03/31 19:30:18 pgoyette 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
RUMP_COMPONENT(RUMP_COMPONENT_DEV)43 RUMP_COMPONENT(RUMP_COMPONENT_DEV)
44 {
45 extern const struct bdevsw ld_bdevsw;
46 extern const struct cdevsw ld_cdevsw;
47 devmajor_t bmaj = -1, cmaj = -1;
48 int error;
49
50 if ((error = devsw_attach("ld", &ld_bdevsw, &bmaj,
51 &ld_cdevsw, &cmaj)) != 0)
52 panic("cannot attach ld: %d", error);
53
54 config_init_component(cfdriver_ioconf_ld_virtio,
55 cfattach_ioconf_ld_virtio, cfdata_ioconf_ld_virtio);
56 }
57
58 /*
59 * Pseudo-devfs. Since creating device nodes is non-free, don't
60 * speculatively create hundreds of them (= milliseconds slower
61 * bootstrap). Instead, after the probe is done, see which units
62 * were found and create nodes only for them.
63 */
RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT)64 RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT)
65 {
66 int error, i;
67
68 for (i = 0; i < 10; i++) {
69 char bbase[] = "/dev/ldX";
70 char rbase[] = "/dev/rldX";
71
72 if (device_lookup(&ld_cd, i) == NULL)
73 break;
74
75 bbase[sizeof(bbase)-2] = '0' + i;
76 rbase[sizeof(rbase)-2] = '0' + i;
77
78 if ((error = rump_vfs_makedevnodes(S_IFBLK, bbase, 'a',
79 bmaj, DISKMINOR(i, 0), 5)) != 0)
80 panic("cannot create cooked ld dev nodes: %d", error);
81 if ((error = rump_vfs_makedevnodes(S_IFCHR, rbase, 'a',
82 cmaj, DISKMINOR(i, 0), 5)) != 0)
83 panic("cannot create raw ld dev nodes: %d", error);
84 }
85 }
86