[Nix-dev] [PATCHES] vsftpd and filesystems

[Lluís Batlle i Rossell]

On Wed, Feb 29, 2012 at 10:46:49AM +0100, Lluís Batlle i Rossell wrote:
> On Wed, Feb 29, 2012 at 09:38:59AM +0100, Lluís Batlle i Rossell wrote:
> > How can it be that btrfs alone does not work then? (I've not investigated this
> > though)
> > 
> > # modprobe --show-depends btrfs
> > insmod /nix/store/xqzg0icd5qgmqs70w0xga2c9r1rxik8i-kernel-modules/lib/modules/3.2.7/kernel/lib/libcrc32c.ko 
> > insmod /nix/store/xqzg0icd5qgmqs70w0xga2c9r1rxik8i-kernel-modules/lib/modules/3.2.7/kernel/lib/zlib_deflate/zlib_deflate.ko 
> > insmod /nix/store/xqzg0icd5qgmqs70w0xga2c9r1rxik8i-kernel-modules/lib/modules/3.2.7/kernel/fs/btrfs/btrfs.ko 
> > 
> > 
> > I've seen crc32c loaded when I load btrfs, but I don't know if it was there
> > before loading btrfs.
> > 
> > # modprobe --show-depends crc32c
> > insmod
> > /nix/store/xqzg0icd5qgmqs70w0xga2c9r1rxik8i-kernel-modules/lib/modules/3.2.7/kernel/crypto/crc32c.ko 
> 
> 
> Ok, I checked, and the initrfs properly includes the dependencies of 'btrfs',
> but does not include crc32c. Including crc32c makes btrfs work (for what I
> remember).
> 
> Why isn't crc32c a depdency of btrfs? I'll ask at #btrfs.

At #btrfs, 'kdave' said that libcrc32c is the correct dependency, and the
implementation of the crc32 calculation algorithm is *dynamically* guessed
depending on the CPU, and thus cannot appear as a dependency of btrfs.

Hence "btrfs" is not enough in the boot.initrd.kernelModules.

Regards,
Lluís.