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Re: ext3 message if FS is not ext3



On Wed, May 23, 2001 at 01:06:16PM +0100, Stephen C. Tweedie wrote:
> On Wed, May 23, 2001 at 02:00:13PM +0200, Florian Lohoff wrote:

> > i think this message should be removed ;)
[..]
> > VFS: Can't find an ext3 filesystem on dev fd(2,0).

> mount(8) tried to get the kernel to mount /dev/fd0 as an ext3
> filesystem.  The kernel is entitled to emit an error in that case.
> ext2 will complain too.

Shouldn't it be doing the mount 'silently' when mount(8) is guessing the
filesystem type? I'm seeing this too (2.2.19 + ext3 0.0.6b):

lilith:tmp$ cat /etc/filesystems
ext3
vfat
lilith:tmp$ grep floppy /etc/fstab
/dev/fd0 /floppy auto noauto,nodev,nosuid,user 0 0
lilith:tmp$ # with a VFAT filesystem on /dev/fd0:
lilith:tmp$ mount /floppy
VFS: Can't find an ext3 filesystem on dev fd(2,0).

Looking at the kernel source, read_super (and hence ext3_read_super) are only
called with silent=1 when mounting the root filesystem. I believe mount(8)
checks for magic numbers at the start of the filesystem, and so avoids
attempting a mount for ext2 or various others.

As the kernel (2.2 or 2.4) doesn't seem to provide a way for userspace to
request a silent mount, I don't know whose (if anyone's) bug this is.

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