Re: [PATCH v2 3/5] btrfs-progs: Add HMAC(SHA256) support

[Anand Jain <anand.jain@oracle.com>]

> diff --git a/crypto/hash.c b/crypto/hash.c
> index fc658475..b1cdfe67 100644
> --- a/crypto/hash.c
> +++ b/crypto/hash.c
> @@ -1,3 +1,7 @@
> +#include <gcrypt.h>

We don't need the libgcrypt library when configured with 
--with-crypto=builtin

So this should come under the define CRYPTOPROVIDER_LIB...


> diff --git a/crypto/hash.h b/crypto/hash.h
> index fefccbd5..252ce9f9 100644
> --- a/crypto/hash.h
> +++ b/crypto/hash.h
> @@ -9,5 +9,7 @@ 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_blake2b(const u8 *buf, size_t length, u8 *out);
> +int hash_hmac_sha256(struct btrfs_fs_info *fs_info, const u8 *buf,
> +		     size_t length, u8 *out);
>   
>   #endif



> diff --git a/disk-io.c b/disk-io.c
> index 6221c3ce..5fa1f0c3 100644
> --- a/disk-io.c
> +++ b/disk-io.c
> @@ -153,6 +153,10 @@ int btrfs_csum_data(struct btrfs_fs_info *fs_info, u16 csum_type,
>   		return hash_sha256(data, len, out);
>   	case BTRFS_CSUM_TYPE_BLAKE2:
>   		return hash_blake2b(data, len, out);
> +	case BTRFS_CSUM_TYPE_HMAC_SHA256:
> +		if (!fs_info || !fs_info->auth_key)
> +			return 0;
> +		return hash_hmac_sha256(fs_info, data, len, out);


hash_hmac_sha256() is defined under CRYPTOPROVIDER_LIB...
So with default builtin option.

/Volumes/ws/btrfs-progs/disk-io.c:159: undefined reference to 
`hash_hmac_sha256'

Thanks, Anand