From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Fri, 18 Nov 2022 17:42:01 +0000 (+0100)
Subject: libblkid: bcachefs: add xxhash checksum support
X-Git-Tag: v2.39-rc1~153
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f5c84384b50fddc7d363241e93e455179138c696;p=thirdparty%2Futil-linux.git

libblkid: bcachefs: add xxhash checksum support
---

diff --git a/libblkid/src/superblocks/bcache.c b/libblkid/src/superblocks/bcache.c
index 3bb909a4d9..2c3b185b94 100644
--- a/libblkid/src/superblocks/bcache.c
+++ b/libblkid/src/superblocks/bcache.c
@@ -14,6 +14,7 @@
 #include "superblocks.h"
 #include "crc32c.h"
 #include "crc64.h"
+#include "xxhash.h"
 
 #define SB_LABEL_SIZE      32
 
@@ -53,11 +54,13 @@ enum bcachefs_sb_csum_type {
 	BCACHEFS_SB_CSUM_TYPE_NONE = 0,
 	BCACHEFS_SB_CSUM_TYPE_CRC32C = 1,
 	BCACHEFS_SB_CSUM_TYPE_CRC64 = 2,
+	BCACHEFS_SB_CSUM_TYPE_XXHASH = 7,
 };
 
 union bcachefs_sb_csum {
 	uint32_t crc32c;
 	uint64_t crc64;
+	XXH64_hash_t xxh64;
 	uint8_t raw[16];
 } __attribute__((packed));
 
@@ -211,6 +214,10 @@ static int bcachefs_validate_checksum(blkid_probe pr, const struct bcachefs_supe
 			uint64_t crc = ul_crc64_we(checksummed_data_start, checksummed_data_size);
 			return blkid_probe_verify_csum(pr, crc, le64_to_cpu(bcs->csum.crc64));
 		}
+		case BCACHEFS_SB_CSUM_TYPE_XXHASH: {
+			XXH64_hash_t xxh64 = XXH64(checksummed_data_start, checksummed_data_size, 0);
+			return blkid_probe_verify_csum(pr, xxh64, le64_to_cpu(bcs->csum.xxh64));
+		}
 		default:
 			DBG(LOWPROBE, ul_debug("bcachefs: unknown checksum type %d, ignoring.", checksum_type));
 			return 1;