Date: Wed, 28 Nov 2007 03:40:02 GMT From: Yuri <yuri@rawbw.com> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/118160: unable to mount / rw while booting 7.0-BETA3 Message-ID: <200711280340.lAS3e20P053261@freefall.freebsd.org>
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The following reply was made to PR bin/118160; it has been noted by GNATS.
From: Yuri <yuri@rawbw.com>
To: Bruce Evans <brde@optusnet.com.au>
Cc: Yuri <yuri@tsoft.com>, freebsd-gnats-submit@freebsd.org,
freebsd-bugs@freebsd.org
Subject: Re: misc/118160: unable to mount / rw while booting 7.0-BETA3
Date: Tue, 27 Nov 2007 19:11:52 -0800
> > While booting log says:
> > Starting file system checks:
> > <here goes the list of file systems that it reports, this is ok>
> > mount: : Operation not permitted.
>
> This is probably a secondary problem. You apparently have the root device
> mounted on "" or something like that.
> What does mount shouw for the root device?
>
No, when I get to shell after this failure during the normal boot process
mount shows:
/dev/ad12s1c / (ufs,local,read-only)
swapinfo shows that swap volume is /dev/ad12s1b
> > The major bug seems to be in the 'mount' system call. 'man mount' says that
> EPERM is returned if "The caller is neither the super-user nor the owner of
> dir." I am root.
>
> You are apparently attempting to mount the same device twice (even though
> -u specifies an already-mounted device, the kernel is apparently confused
> about where it is mounted).
>
I thought that mount command is supposed to pick up the locations correctly,
so that when I say 'mount -uw /' device should be picked up from the already
mounted list.
Also I found that swapon and mount are related in my case. Once swapon is done
I can't remount root as r/w. And vice versa, when mount -uw is done swapon
returns EPERM.
This happens when I boot as single user. When I do swapon consecutive
'mount -uw ' fails. When I do 'mount -uw' consecutive swapon fails.
So I don't have swap at all since this command failed during boot.
I guess 'nmount' and 'swapon' system calls are similar and somehow interfere
with each other.
So I still can't boot normally, only through single user mode and I don't
have swap at all after this.
Yuri
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