Re: [PATCH v3 0/2] btrfs: Add zstd support to grub btrfs

[Paul Menzel <pmenzel@molgen.mpg.de>]

Dear Nick,


Thank you very much for your patches.


Am 10.10.2018 um 01:21 schrieb Nick Terrell:

> This patch set imports the upstream zstd library, adds zstd support to the
> btrfs module, and adds a test case. I've also tested the patch set by storing
> my boot partition in btrfs with and without zstd compression and rebooting.
> 
> The fist patch imports the files needed to support zstd decompression from
> zstd-1.3.6 as-is. It is a very large patch. In case it doesn't make it,
> I've included the commit hash and the script I used to download the files.
> 
> Upstream zstd commit hash: 4fa456d7f12f8b27bd3b2f5dfd4f46898cb31c24
> Upstream zstd commit name: Merge pull request #1354 from facebook/dev
> 
> ---
> #!/bin/sh -e
> 
> curl -L -O https://github.com/facebook/zstd/releases/download/v1.3.6/zstd-1.3.6.tar.gz
> curl -L -O https://github.com/facebook/zstd/releases/download/v1.3.6/zstd-1.3.6.tar.gz.sha256
> sha256sum --check zstd-1.3.6.tar.gz.sha256
> tar xzf zstd-1.3.6.tar.gz
> 
> SRC_LIB="zstd-1.3.6/lib"
> DST_LIB="grub-core/lib/zstd"
> rm -rf $DST_LIB
> mkdir -p $DST_LIB
> cp $SRC_LIB/zstd.h $DST_LIB/
> cp $SRC_LIB/common/*.[hc] $DST_LIB/
> cp $SRC_LIB/decompress/*.[hc] $DST_LIB/
> rm $DST_LIB/{pool.[hc],threading.[hc]}
> rm -rf zstd-1.3.6*
> echo SUCCESS!
> ---

Sorry for being ignorant, but you explain, why the library needs to be 
imported and it is not enough to use that library as an external dependency?

Importing the library means, it has to be maintained in the GRUB 
repository, which will result in some maintenance burden.


Kind regards,

Paul