Re: lz4hc compression in UBIFS?

[Konstantin Tokarev <annulen@yandex.ru>]

23.10.2013, 22:26, "Yann Collet" <yann.collet.73@gmail.com>:
> UBIFS error (pid 4288): ubifs_decompress: cannot decompress 12 bytes,
> (...)
>         data size      12
>         data:
>         00000000: 1f 00 01 00 ff e8 50 00 00 00 00 00
>
> The compressed format is correct.
> It describes a flow of 00, of size ~500.
>
> So the problem seems more likely on the decompression side.
>
> Are you sure you are providing "12" as the "input size" parameter ? and that
> the "maximum output size" parameter is correctly provided ? (i.e. >= to
> original data size)
>

Decompression code in kernel[1] is heavily modified. In particular, lz4_uncompress
function (used in this case) does not have input size parameter at all,
while it's present in lz4_uncompress_unknownoutputsize.

[1] lib/lz4/lz4_decompress.c

-- 
Regards,
Konstantin