On (08/20/15 15:34), Joonsoo Kim wrote:
> lz4's decompression doesn't requires any scratch buffer so
> it doesn't need tfm context. Hence, it can support
> crypto compression noctx API and this patch implements it.
>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> ---
> crypto/lz4.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/crypto/lz4.c b/crypto/lz4.c
> index 1848435..aa23da3 100644
> --- a/crypto/lz4.c
> +++ b/crypto/lz4.c
> @@ -76,6 +76,21 @@ static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
> return err;
> }
>
> +static int lz4_decompress_noctx(const u8 *src, unsigned int slen,
> + u8 *dst, unsigned int *dlen)
> +{
> + int err;
> + size_t tmp_len = *dlen;
> + size_t __slen = slen;
> +
> + err = lz4_decompress_unknownoutputsize(src, __slen, dst, &tmp_len);
> + if (err < 0)
> + return -EINVAL;
> +
> + *dlen = tmp_len;
> + return err;
> +}
> +
same,
static int lz4_decompress_noctx(const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen)
{
return lz4_decompress_crypto(NULL, ....);
}
?
> static struct crypto_alg alg_lz4 = {
> .cra_name = "lz4",
> .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
> @@ -88,7 +103,7 @@ static struct crypto_alg alg_lz4 = {
> .coa_compress = lz4_compress_crypto,
> .coa_decompress = lz4_decompress_crypto,
> .coa_compress_noctx = NULL,
> - .coa_decompress_noctx = NULL } }
> + .coa_decompress_noctx = lz4_decompress_noctx } }
> };
>
> static int __init lz4_mod_init(void)
> --
> 1.9.1
>
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