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 <[email protected]> --- 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
