[PATCH] erofs: Zstandard compression support

[Chao Yu]

On 2024/5/8 17:03, Gao Xiang wrote:
> Add Zstandard compression as the 4th supported algorithm since it
> becomes more popular now and some end users have asked this for
> quite a while [1][2].
> 
> Each EROFS physical cluster contains only one valid standard
> Zstandard frame as described in [3] so that decompression can be
> performed on a per-pcluster basis independently.
> 
> Currently, it just leverages multi-call stream decompression APIs with
> internal sliding window buffers.  One-shot or bufferless decompression
> could be implemented later for even better performance if needed.
> 
> [1] https://github.com/erofs/erofs-utils/issues/6
> [2] https://lore.kernel.org/r/Y08h+z6CZdnS1XBm@B-P7TQMD6M-0146.lan
> [3] https://www.rfc-editor.org/rfc/rfc8478.txt
> Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Acked-by: Chao Yu <chao at kernel.org>

Thanks,