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Date:      Mon, 18 Feb 2008 09:13:03 +0100 (CET)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        perryh@pluto.rain.com
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Mounting a read-only md FS as read-only
Message-ID:  <20080218091206.M1189@wojtek.tensor.gdynia.pl>
In-Reply-To: <47b92e38.PPjllqvtMAVuJE1V%perryh@pluto.rain.com>
References:  <47b92e38.PPjllqvtMAVuJE1V%perryh@pluto.rain.com>

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> want to change the image, just examine it, I specified -o readonly
> to mdconfig and the equivalent to mount.  Is there some reason why
> this should not work?  The backing file, and the mountpoint, do
> exist.

does mount_ext2fs support readonly at all?

try -o readonly before -f filename in mdconfig but i don't know if it does 
matter.



>
> # ls -ld [filename]
> -rw-r--r--  1 perryh  perryh  104857600 Mar 16  2007 [filename]
> # mdconfig -a -t vnode -f [filename] -o readonly
> md0
> # ls -ld /dev/md0 /[mountpoint]
> crw-r-----  1 root  operator    1,  15 Nov 24 21:17 /dev/md0
> drwxr-xr-x  2 perryh  perryh        512 Feb 17 21:57 /[mountpoint]
> # mount -r -o noexec -t ext2fs /dev/md0 /[mountpoint]
> mount_ext2fs: /dev/md0: Read-only file system
> # mount -o ro,noexec -t ext2fs /dev/md0 /[mountpoint]
> mount_ext2fs: /dev/md0: Read-only file system
> # /sbin/mount_ext2fs -o ro,noexec /dev/md0 /[mountpoint]
> mount_ext2fs: /dev/md0: Read-only file system
> # mdconfig -l -u 0
> md0     vnode     100M  /[mountpoint]
> # uname -a
> FreeBSD fbsd61 6.1-RELEASE FreeBSD 6.1-RELEASE #30: Mon Jan  1 23:01:34 PST 2007     perryh@fbsd61:/usr/src/sys/i386/compile/GENERIC  i386
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