From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Fri, 18 Nov 2022 19:07:37 +0000 (+0100)
Subject: libblkid: btrfs: add support for xxhash checksums
X-Git-Tag: v2.39-rc1~410^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fe26258e3ae00f2c638ebeef5d2160c2c7774552;p=thirdparty%2Futil-linux.git

libblkid: btrfs: add support for xxhash checksums
---

diff --git a/libblkid/src/superblocks/btrfs.c b/libblkid/src/superblocks/btrfs.c
index de39b70fb8..b9cf4bd370 100644
--- a/libblkid/src/superblocks/btrfs.c
+++ b/libblkid/src/superblocks/btrfs.c
@@ -20,15 +20,18 @@
 #include "superblocks.h"
 #include "crc32c.h"
 #include "sha256.h"
+#include "xxhash.h"
 
 enum btrfs_super_block_csum_type {
 	BTRFS_SUPER_BLOCK_CSUM_TYPE_CRC32C = 0,
+	BTRFS_SUPER_BLOCK_CSUM_TYPE_XXHASH = 1,
 	BTRFS_SUPER_BLOCK_CSUM_TYPE_SHA256 = 2,
 };
 
 union btrfs_super_block_csum {
 	uint8_t bytes[32];
 	uint32_t crc32c;
+	XXH64_hash_t xxh64;
 	uint8_t sha256[UL_SHA256LENGTH];
 };
 
@@ -227,6 +230,11 @@ static int btrfs_verify_csum(blkid_probe pr, const struct btrfs_super_block *bfs
 			return blkid_probe_verify_csum(pr, crc,
 					le32_to_cpu(bfs->csum.crc32c));
 		}
+		case BTRFS_SUPER_BLOCK_CSUM_TYPE_XXHASH: {
+			XXH64_hash_t xxh64 = XXH64(csum_data, csum_data_size, 0);
+			return blkid_probe_verify_csum(pr, xxh64,
+					le64_to_cpu(bfs->csum.xxh64));
+		}
 		case BTRFS_SUPER_BLOCK_CSUM_TYPE_SHA256: {
 			uint8_t sha256[UL_SHA256LENGTH];
 			ul_SHA256(sha256, csum_data, csum_data_size);