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Autogenerate /dev/ldNx nodes based on which units attached instead of

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hardcoding some arbitrary value for N.
This commit is contained in:
pooka 2015-05-16 15:03:12 +00:00
parent 9fbb6a243a
commit c67798ece2
1 changed files with 28 additions and 10 deletions
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38
sys/rump/dev/lib/libvirtio_ld/ld_at_virtio.c
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@ -1,4 +1,4 @@
/* $NetBSD: ld_at_virtio.c,v 1.1 2014/08/22 09:57:05 pooka Exp $ */
/* $NetBSD: ld_at_virtio.c,v 1.2 2015/05/16 15:03:12 pooka Exp $ */
/*
* Copyright (c) 2010 Antti Kantee. All Rights Reserved.
@ -26,13 +26,14 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ld_at_virtio.c,v 1.1 2014/08/22 09:57:05 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: ld_at_virtio.c,v 1.2 2015/05/16 15:03:12 pooka Exp $");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/bus.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include "rump_private.h"
#include "rump_vfs_private.h"
@ -46,21 +47,38 @@ RUMP_COMPONENT(RUMP_COMPONENT_DEV)
cfattach_ioconf_virtio_ld, cfdata_ioconf_virtio_ld);
}
RUMP_COMPONENT(RUMP_COMPONENT_VFS)
/*
* Pseudo-devfs. Since creating device nodes is non-free, don't
* speculatively create hundreds of them (= milliseconds slower
* bootstrap). Instead, after the probe is done, see which units
* were found and create nodes only for them.
*/
RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT)
{
extern const struct bdevsw ld_bdevsw;
extern const struct cdevsw ld_cdevsw;
devmajor_t bmaj = -1, cmaj = -1;
int error;
int error, i;
if ((error = devsw_attach("ld", &ld_bdevsw, &bmaj,
&ld_cdevsw, &cmaj)) != 0)
panic("cannot attach ld: %d", error);
if ((error = rump_vfs_makedevnodes(S_IFBLK, "/dev/ld0", 'a',
bmaj, 0, 7)) != 0)
panic("cannot create cooked ld dev nodes: %d", error);
if ((error = rump_vfs_makedevnodes(S_IFCHR, "/dev/rld0", 'a',
cmaj, 0, 7)) != 0)
panic("cannot create raw ld dev nodes: %d", error);
for (i = 0; i < 10; i++) {
char bbase[] = "/dev/ldX";
char rbase[] = "/dev/rldX";
if (device_lookup(&ld_cd, i) == NULL)
break;
bbase[sizeof(bbase)-2] = '0' + i;
rbase[sizeof(rbase)-2] = '0' + i;
if ((error = rump_vfs_makedevnodes(S_IFBLK, bbase, 'a',
bmaj, DISKMINOR(i, 0), 5)) != 0)
panic("cannot create cooked ld dev nodes: %d", error);
if ((error = rump_vfs_makedevnodes(S_IFCHR, rbase, 'a',
cmaj, DISKMINOR(i, 0), 5)) != 0)
panic("cannot create raw ld dev nodes: %d", error);
}
}