Re: Bug in ext3

[Ben Collins <bcollins@debian.org>]

On Thu, Nov 15, 2001 at 12:48:26PM -0800, Andrew Morton wrote:
> Ben Collins wrote:
> > 
> > > Please send the output of dumpe2fs, and of `fsck -fy'.
> > 
> > No, it has always been an ext2 filesystem, and never was ext3. Fsck
> > shows no errors. The point being that I do _not_ want my root filesystem
> > to be ext3, but I do want ext3 built into the kernel. That case should
> > not cause a problem like I have seen.
> > 
> 
> ext3 thinks that the filesystem's superblock has the
> EXT3_FEATURE_COMPAT_HAS_JOURNAL bit set in the s_feature_compat
> field of the on-disk superblock.
> 
> It's probable that that bit _is_ set.  ext2 will never notice it.
> 
> Please: the dumpe2fs output?

Seems it does have the field set. I guess the bug is then that if there
is no journal, then it shoudl fail to mount it, so ext2 will take over.
Is there any reason to mount a partition as ext3 if there is no journal
to be found?

Filesystem volume name:   <none>
Last mounted on:          <not available>
Filesystem UUID:          <none>
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal filetype sparse_super
Filesystem state:         not clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              1015808
Block count:              2028288
Reserved block count:     101414
Free blocks:              372624
Free inodes:              690438
First block:              0
Block size:               4096
Fragment size:            4096
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         16384
Inode blocks per group:   512
Last mount time:          Thu Nov 15 10:07:12 2001
Last write time:          Thu Nov 15 15:55:23 2001
Mount count:              2
Maximum mount count:      20
Last checked:             Thu Nov 15 08:48:40 2001
Check interval:           15552000 (6 months)
Next check after:         Tue May 14 09:48:40 2002
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128


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