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fs/btrfs: add dependency on BLAKE2 hash

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Now btrfs can utilize the newly intorudced BLAKE2 hash.

Signed-off-by: Qu Wenruo <wqu@suse.com>
This commit is contained in:
Qu Wenruo 2021-12-27 14:12:08 +08:00 committed by Tom Rini
parent 7c3fd5c25d
commit 1617165a17
4 changed files with 18 additions and 0 deletions
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1
fs/btrfs/Kconfig
View File

@ -6,6 +6,7 @@ config FS_BTRFS
select ZSTD
select RBTREE
select SHA256
select BLAKE2
help
This provides a single-device read-only BTRFS support. BTRFS is a
next-generation Linux file system based on the copy-on-write

14
fs/btrfs/crypto/hash.c
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@ -4,6 +4,7 @@
#include <linux/unaligned/access_ok.h>
#include <linux/types.h>
#include <u-boot/sha256.h>
#include <u-boot/blake2.h>
#include <u-boot/crc.h>
static u32 btrfs_crc32c_table[256];
@ -39,6 +40,19 @@ int hash_xxhash(const u8 *buf, size_t length, u8 *out)
return 0;
}
/* We use the full CSUM_SIZE(32) for BLAKE2B */
#define BTRFS_BLAKE2_HASH_SIZE 32
int hash_blake2(const u8 *buf, size_t length, u8 *out)
{
blake2b_state S;
blake2b_init(&S, BTRFS_BLAKE2_HASH_SIZE);
blake2b_update(&S, buf, length);
blake2b_final(&S, out, BTRFS_BLAKE2_HASH_SIZE);
return 0;
}
int hash_crc32c(const u8 *buf, size_t length, u8 *out)
{
u32 crc;

1
fs/btrfs/crypto/hash.h
View File

@ -9,6 +9,7 @@ void btrfs_hash_init(void);
int hash_crc32c(const u8 *buf, size_t length, u8 *out);
int hash_xxhash(const u8 *buf, size_t length, u8 *out);
int hash_sha256(const u8 *buf, size_t length, u8 *out);
int hash_blake2(const u8 *buf, size_t length, u8 *out);
u32 crc32c(u32 seed, const void * data, size_t len);

2
fs/btrfs/disk-io.c
View File

@ -126,6 +126,8 @@ int btrfs_csum_data(u16 csum_type, const u8 *data, u8 *out, size_t len)
return hash_xxhash(data, len, out);
case BTRFS_CSUM_TYPE_SHA256:
return hash_sha256(data, len, out);
case BTRFS_CSUM_TYPE_BLAKE2:
return hash_blake2(data, len, out);
default:
printf("Unknown csum type %d\n", csum_type);
return -EINVAL;