Re: dd/skip-seek-past-file fail on ecryptfs

[Jim Meyering]

Pádraig Brady wrote:
> Bert Wesarg wrote:
>> 2009/9/14 Pádraig Brady <address@hidden>:
>>> Bert Wesarg wrote:
>>>> This short mail is only to inform you, that the dd/skip-seek-past-file
>>>> test fail on a ecryptfs mount. Because this commands takes a long time
>>>> and eat my hard disk space:
>>>>
>>>> truncate --size=$OFF_T_MAX in
>>>>
>>>> More infos at monday.
>>> So ecryptfs doesn't allow sparse files:
>>> http://ecryptfs.sourceforge.net/ecryptfs-faq.html#sparse
>>>
>>> Even still it seems like ecryptfs should have immediately
>>> returned, given the "seek" offset is larger than the file
>>> system size?
>>>
>>> The attached patch should work around this issue.
>> Thanks for the patch. But the require_sparse_support_() does not
>> trigger on a ecryptfs. du -sk still reports 0.
>
> :( So ecryptfs reports 0 disk usage even though it's
> writing out the files and using up space in the file system.

IMHO, that's a serious bug, and we should not change the
tests to work around it.

It is serious enough that I'm inclined not even to skip
the test when the file system type is ecryptfs.