btrfs: use xxhash64 for checksumming
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index 38651fa..6d5a01c 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -5,6 +5,7 @@
select CRYPTO
select CRYPTO_CRC32C
select LIBCRC32C
+ select CRYPTO_XXHASH
select ZLIB_INFLATE
select ZLIB_DEFLATE
select LZO_COMPRESS
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 139354d..c62729d 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -87,6 +87,7 @@ static const struct btrfs_csums {
const char *name;
} btrfs_csums[] = {
[BTRFS_CSUM_TYPE_CRC32] = { .size = 4, .name = "crc32c" },
+ [BTRFS_CSUM_TYPE_XXHASH] = { .size = 8, .name = "xxhash64" },
};
#define BTRFS_EMPTY_DIR_SIZE 0
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 99dfd88..ac039a4 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -352,6 +352,7 @@ static bool btrfs_supported_super_csum(u16 csum_type)
{
switch (csum_type) {
case BTRFS_CSUM_TYPE_CRC32:
+ case BTRFS_CSUM_TYPE_XXHASH:
return true;
default:
return false;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1b151af..60116d0 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2456,3 +2456,4 @@ module_exit(exit_btrfs_fs)
MODULE_LICENSE("GPL");
MODULE_SOFTDEP("pre: crc32c");
+MODULE_SOFTDEP("pre: xxhash64");
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index b65c7ee..ba2f125 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -302,6 +302,7 @@
/* csum types */
enum btrfs_csum_type {
BTRFS_CSUM_TYPE_CRC32 = 0,
+ BTRFS_CSUM_TYPE_XXHASH = 1,
};
/*
