Re: Creating a >32bit blocks filesystem.

["Jose R. Santos" <jrs@us.ibm.com>]

On Fri, 04 May 2007 16:58:35 +0200
Valerie Clement <valerie.clement@bull.net> wrote:
> Hi Jose,
> I began to port our modifications done for the 64-bit support against 
> the new version of e2fsprogs Ted posted at the beginning of the week.
> Note that it is *just* for test use as it breaks the backwards 
> compatibility.
> I did a few tests with a kernel 2.6.17-rc7 and it seems to work, at 
> least mkfs, debugfs and fsck tools.

Hi Valerie,

I tried the patches and while the tools such as mkfs and debugfs seem
to work fine, I am still unable to mount a filesystem with block
numbers exceeding 32 bits.  I am testing on a 2.6.21.1 kernel with the
ext4 patches from:

ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ext4-patches/2.6.21-ext4-1

The following error shows up on the kernel log:

[12145.598822] EXT4-fs error (device dm-2): ext4_check_descriptors: Block bitmap for group 0 not in group (block 18446744069414584320)!
[12145.670781] EXT4-fs: group descriptors corrupted!

So its failing very early in ext4_check_descriptors().  The hi 32 bits of block_bitmap for the first group seem to be set all to 1s.

Thanks

-JRS