Upstream commit 997fa5ba1e14b52c554fb03ce39e579e6f27b90c,
git repository: git://github.com/BLAKE2/BLAKE2
The reference implemetation added in this patch is unchanged and will be
modified only to compile in current code base and with minimal other
modifications in case of future sync with upstream code. IOW, the coding
style should stay as-is and does not conform to the other btrfs-progs
code. This is an exception for xxhash and sha256 code as well.
Signed-off-by: David Sterba <dsterba@suse.com>
Add the definition to the checksum types and let mkfs accept it.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>
A simple tool to microbenchmark performance of the hashes. Uses rdtsc
for timing, so works only on x86_64.
$ make hash-speedtest
$ ./hash-speedtest [iterations]
Block size: 4096
Iterations: 100000
NULL-NOP: cycles: 56061823, c/i 560
NULL-MEMCPY: cycles: 61296469, c/i 612
CRC32C: cycles: 179961796, c/i 1799
XXHASH: cycles: 138434590, c/i 1384
Signed-off-by: David Sterba <dsterba@suse.com>
The SHA256 is going to be used in the future, so this makes it a second
user and we also have the appropriate directory now.
Signed-off-by: David Sterba <dsterba@suse.com>
With the introduction of xxhash64 to btrfs-progs we created a crypto/
directory for all the hashes used in btrfs (although no
cryptographically secure hash is there yet).
Move the crc32c implementation from kernel-lib/ to crypto/ as well so we
have all hashes consolidated.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>
Copy of xxhash.[ch] from git://github.com/Cyan4973/xxHash, version
v0.7.1. The include xxh3.h has been commented out as we don't have it
here, otherwise the copy is unchnaged.
Signed-off-by: David Sterba <dsterba@suse.com>
