Introduce BLAKE3 checksums as an OpenZFS feature

This commit adds BLAKE3 checksums to OpenZFS, it has similar
performance to Edon-R, but without the caveats around the latter.

Homepage of BLAKE3: https://github.com/BLAKE3-team/BLAKE3
Wikipedia: https://en.wikipedia.org/wiki/BLAKE_(hash_function)#BLAKE3

Short description of Wikipedia:

  BLAKE3 is a cryptographic hash function based on Bao and BLAKE2,
  created by Jack O'Connor, Jean-Philippe Aumasson, Samuel Neves, and
  Zooko Wilcox-O'Hearn. It was announced on January 9, 2020, at Real
  World Crypto. BLAKE3 is a single algorithm with many desirable
  features (parallelism, XOF, KDF, PRF and MAC), in contrast to BLAKE
  and BLAKE2, which are algorithm families with multiple variants.
  BLAKE3 has a binary tree structure, so it supports a practically
  unlimited degree of parallelism (both SIMD and multithreading) given
  enough input. The official Rust and C implementations are
  dual-licensed as public domain (CC0) and the Apache License.

Along with adding the BLAKE3 hash into the OpenZFS infrastructure a
new benchmarking file called chksum_bench was introduced.  When read
it reports the speed of the available checksum functions.

On Linux: cat /proc/spl/kstat/zfs/chksum_bench
On FreeBSD: sysctl kstat.zfs.misc.chksum_bench

This is an example output of an i3-1005G1 test system with Debian 11:

implementation      1k      4k     16k     64k    256k      1m      4m
edonr-generic     1196    1602    1761    1749    1762    1759    1751
skein-generic      546     591     608     615     619     612     616
sha256-generic     240     300     316     314     304     285     276
sha512-generic     353     441     467     476     472     467     426
blake3-generic     308     313     313     313     312     313     312
blake3-sse2        402    1289    1423    1446    1432    1458    1413
blake3-sse41       427    1470    1625    1704    1679    1607    1629
blake3-avx2        428    1920    3095    3343    3356    3318    3204
blake3-avx512      473    2687    4905    5836    5844    5643    5374

Output on Debian 5.10.0-10-amd64 system: (Ryzen 7 5800X)

implementation      1k      4k     16k     64k    256k      1m      4m
edonr-generic     1840    2458    2665    2719    2711    2723    2693
skein-generic      870     966     996     992    1003    1005    1009
sha256-generic     415     442     453     455     457     457     457
sha512-generic     608     690     711     718     719     720     721
blake3-generic     301     313     311     309     309     310     310
blake3-sse2        343    1865    2124    2188    2180    2181    2186
blake3-sse41       364    2091    2396    2509    2463    2482    2488
blake3-avx2        365    2590    4399    4971    4915    4802    4764

Output on Debian 5.10.0-9-powerpc64le system: (POWER 9)

implementation      1k      4k     16k     64k    256k      1m      4m
edonr-generic     1213    1703    1889    1918    1957    1902    1907
skein-generic      434     492     520     522     511     525     525
sha256-generic     167     183     187     188     188     187     188
sha512-generic     186     216     222     221     225     224     224
blake3-generic     153     152     154     153     151     153     153
blake3-sse2        391    1170    1366    1406    1428    1426    1414
blake3-sse41       352    1049    1212    1174    1262    1258    1259

Output on Debian 5.10.0-11-arm64 system: (Pi400)

implementation      1k      4k     16k     64k    256k      1m      4m
edonr-generic      487     603     629     639     643     641     641
skein-generic      271     299     303     308     309     309     307
sha256-generic     117     127     128     130     130     129     130
sha512-generic     145     165     170     172     173     174     175
blake3-generic      81      29      71      89      89      89      89
blake3-sse2        112     323     368     379     380     371     374
blake3-sse41       101     315     357     368     369     364     360

Structurally, the new code is mainly split into these parts:
- 1x cross platform generic c variant: blake3_generic.c
- 4x assembly for X86-64 (SSE2, SSE4.1, AVX2, AVX512)
- 2x assembly for ARMv8 (NEON converted from SSE2)
- 2x assembly for PPC64-LE (POWER8 converted from SSE2)
- one file for switching between the implementations

Note the PPC64 assembly requires the VSX instruction set and the
kfpu_begin() / kfpu_end() calls on PowerPC were updated accordingly.

Reviewed-by: Felix Dörre <[email protected]>
Reviewed-by: Ahelenia Ziemiańska <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tino Reichardt <[email protected]>
Co-authored-by: Rich Ercolani <[email protected]>
Closes #10058
Closes #12918 

2 files changed, 27 insertions, 12 deletions

diff --git a/module/zcommon/zfeature_common.c b/module/zcommon/zfeature_common.c
index f09389e6d..4df09884a 100644
--- a/module/zcommon/zfeature_common.c
+++ b/module/zcommon/zfeature_common.c
@@ -696,16 +696,15 @@ zpool_feature_init(void)
 	    ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 
 	{
-
-	static const spa_feature_t zilsaxattr_deps[] = {
-		SPA_FEATURE_EXTENSIBLE_DATASET,
-		SPA_FEATURE_NONE
-	};
-	zfeature_register(SPA_FEATURE_ZILSAXATTR,
-	    "org.openzfs:zilsaxattr", "zilsaxattr",
-	    "Support for xattr=sa extended attribute logging in ZIL.",
-	    ZFEATURE_FLAG_PER_DATASET | ZFEATURE_FLAG_READONLY_COMPAT,
-	    ZFEATURE_TYPE_BOOLEAN, zilsaxattr_deps, sfeatures);
+		static const spa_feature_t zilsaxattr_deps[] = {
+			SPA_FEATURE_EXTENSIBLE_DATASET,
+			SPA_FEATURE_NONE
+		};
+		zfeature_register(SPA_FEATURE_ZILSAXATTR,
+		    "org.openzfs:zilsaxattr", "zilsaxattr",
+		    "Support for xattr=sa extended attribute logging in ZIL.",
+		    ZFEATURE_FLAG_PER_DATASET | ZFEATURE_FLAG_READONLY_COMPAT,
+		    ZFEATURE_TYPE_BOOLEAN, zilsaxattr_deps, sfeatures);
 	}
 
 	zfeature_register(SPA_FEATURE_HEAD_ERRLOG,
@@ -714,6 +713,18 @@ zpool_feature_init(void)
 	    ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL,
 	    sfeatures);
 
+	{
+		static const spa_feature_t blake3_deps[] = {
+			SPA_FEATURE_EXTENSIBLE_DATASET,
+			SPA_FEATURE_NONE
+		};
+		zfeature_register(SPA_FEATURE_BLAKE3,
+		    "org.openzfs:blake3", "blake3",
+		    "BLAKE3 hash algorithm.",
+		    ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
+		    blake3_deps, sfeatures);
+	}
+
 	zfs_mod_list_supported_free(sfeatures);
 }
 
diff --git a/module/zcommon/zfs_prop.c b/module/zcommon/zfs_prop.c
index 500d80a33..32475611e 100644
--- a/module/zcommon/zfs_prop.c
+++ b/module/zcommon/zfs_prop.c
@@ -84,6 +84,7 @@ zfs_prop_init(void)
 		{ "sha512",	ZIO_CHECKSUM_SHA512 },
 		{ "skein",	ZIO_CHECKSUM_SKEIN },
 		{ "edonr",	ZIO_CHECKSUM_EDONR },
+		{ "blake3",	ZIO_CHECKSUM_BLAKE3 },
 		{ NULL }
 	};
 
@@ -102,6 +103,9 @@ zfs_prop_init(void)
 				ZIO_CHECKSUM_SKEIN | ZIO_CHECKSUM_VERIFY },
 		{ "edonr,verify",
 				ZIO_CHECKSUM_EDONR | ZIO_CHECKSUM_VERIFY },
+		{ "blake3",	ZIO_CHECKSUM_BLAKE3 },
+		{ "blake3,verify",
+				ZIO_CHECKSUM_BLAKE3 | ZIO_CHECKSUM_VERIFY },
 		{ NULL }
 	};
 
@@ -394,12 +398,12 @@ zfs_prop_init(void)
 	    ZIO_CHECKSUM_DEFAULT, PROP_INHERIT, ZFS_TYPE_FILESYSTEM |
 	    ZFS_TYPE_VOLUME,
 	    "on | off | fletcher2 | fletcher4 | sha256 | sha512 | skein"
-	    " | edonr",
+	    " | edonr | blake3",
 	    "CHECKSUM", checksum_table, sfeatures);
 	zprop_register_index(ZFS_PROP_DEDUP, "dedup", ZIO_CHECKSUM_OFF,
 	    PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 	    "on | off | verify | sha256[,verify] | sha512[,verify] | "
-	    "skein[,verify] | edonr,verify",
+	    "skein[,verify] | edonr,verify | blake3[,verify]",
 	    "DEDUP", dedup_table, sfeatures);
 	zprop_register_index(ZFS_PROP_COMPRESSION, "compression",
 	    ZIO_COMPRESS_DEFAULT, PROP_INHERIT,