[U-Boot] [PATCH V5 1/2] ext4fs ls load support

Rob Herring
2012-09-12T22:57:55Z

On 09/12/2012 05:49 PM, Tom Rini wrote:
> On Mon, Aug 13, 2012 at 01:28:19PM -0500, Rob Herring wrote:
>> On 08/13/2012 06:52 AM, Wolfgang Denk wrote:
>>> Dear Rob Herring,
>>>
>>> In message <50244D5A.3080304@gmail.com> you wrote:
>>>>
>>>> I reported already that the prior version that ext4 has issues with
>>>> sub-directories. I don't think that has been addressed in V5. Some
>>>> directories show up fine and some don't. So it's kind of random whether
>>>> u-boot can read a /boot directory. This was after full ubuntu installs.
>>>> I'd guess a simple test with a couple of files and directories will not
>>>> show the problem.
>>>
>>> We really need a test case here. In my (certainly not very extensive)
>>> tests I didn't see such a problem.
>>>
>>> Can you please describe what failed for you?
>>>
>>
>> I do an ubuntu install to a single ext4 fs and then ext2ls gives this:
> [snip]
>> The problem is in the directories with sizes of 0. It does seem to be
>> directories with higher blkno's. Perhaps the lack of support for hash
>> table directory entries is a problem. Just guessing here as I don't know
>> much about ext4 structure.
>>
>> I haven't been able to produce a simple example just creating a bunch of
>> files and directories, so only the disk after an ubuntu install has the
>> problem.
>
> I took an Ubuntu install I had (for x86) that was on a USB drive, had
> been pretty extensively used, and was is ext4. I couldn't find any size
> 0 directories. Are you able to reproduce this problem on other
> hardware? Is the image in question NOT remountable as ext3 (extents is
> set, generated) ? My biggest concern is breakage among ext2/3
> filesystems. Thanks!

What size partition? It is also fine for me with a small 1.2GB
partition. I only see the problem with larger partitions (most of a
250GB drive).

I was under the impression that ext4 is not mountable as ext3.

Rob