Date: Tue, 10 Feb 2004 22:14:05 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/62658: loader/kernel answer to `boot -a' ignored when comconsole is configured Message-ID: <200402101914.i1AJE594001545@woozle.rinet.ru> Resent-Message-ID: <200402101920.i1AJKFkU021341@freefall.freebsd.org>
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>Number: 62658
>Category: kern
>Synopsis: loader/kernel answer to `boot -a' ignored when comconsole is configured
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Feb 10 11:20:14 PST 2004
>Closed-Date:
>Last-Modified:
>Originator: Dmitry Morozovsky
>Release: FreeBSD 4-STABLE i386
>Organization:
Cronyx Plus LLC (RiNet ISP)
>Environment:
System: FreeBSD 4-STABLE
>Description:
FreeBSD loader/kernel refuses to set up the emergency root device when asked to, if
the console is configured as comconsole:
[loader prompt] boot -a -s
...
...
ad0: 7339MB <QUANTUM FIREBALL EL7.6A> [15907/15/63] at ata0-master UDMA33
Manual root filesystem specification:
<fstype>:<device> Mount <device> using filesystem <fstype>
eg. ufs:/dev/da0s1a
? List valid disk boot devices
<empty line> Abort manual input
mountroot> ufs:/dev/ad0s1e
Mounting root from ufs:/dev/ad0s1a
Look at the two last lines. Input asked at vfs_mountroot_ask() has not been
used, possibly because kern/vfs_conf.c:gets() dit not actually read the input
from comconsole. However, I'm not kernel hacker and looking at kern/tty_cons.c
scares me a bit :)
yar@ confirmed this bug also exists in -current
>How-To-Repeat:
configure comconsole, such as `echo -h >/boot.config'
reboot
enter any path to root partition but configured, or simple `?'
watch for kernel mounting default root partition
>Fix:
None for the moment, sorry.
Possible workaround (at least for 4-stable):
set vfs.root.mountfrom="/dev/DEVICE-TO-MAKE-ROOT"
at loader prompt before `boot'
>Release-Note:
>Audit-Trail:
>Unformatted:
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