Currently btrfs_csum_data() relied on the crc32c() wrapper around the crypto
framework for calculating the CRCs.
As we have our own crypto_shash structure in the fs_info now, we can
directly call into the crypto framework without going trough the wrapper.
Signed-off-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
---
fs/btrfs/disk-io.c | 28 ++++++++++++++++++++++++++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index fb0b06b7b9f6..0c9ac7b45ce8 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -253,12 +253,36 @@ struct extent_map *btree_get_extent(struct btrfs_inode *inode,
u32 btrfs_csum_data(struct btrfs_fs_info *fs_info, const char *data,
u32 seed, size_t len)
{
- return crc32c(seed, data, len);
+ SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
+ u32 *ctx = (u32 *)shash_desc_ctx(shash);
+ u32 retval;
+ int err;
+
+ shash->tfm = fs_info->csum_shash;
+ shash->flags = 0;
+ *ctx = seed;
+
+ err = crypto_shash_update(shash, data, len);
+ ASSERT(err);
+
+ retval = *ctx;
+ barrier_data(ctx);
+
+ return retval;
}
void btrfs_csum_final(struct btrfs_fs_info *fs_info, u32 crc, u8 *result)
{
- put_unaligned_le32(~crc, result);
+ SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
+ u32 *ctx = (u32 *)shash_desc_ctx(shash);
+ int err;
+
+ shash->tfm = fs_info->csum_shash;
+ shash->flags = 0;
+ *ctx = crc;
+
+ err = crypto_shash_final(shash, result);
+ ASSERT(err);
}
/*
--
2.16.4
