On (08/20/15 15:34), Joonsoo Kim wrote:
> lzo'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/lzo.c | 18 +++++++++++++++++-
> 1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/crypto/lzo.c b/crypto/lzo.c
> index 9ca516b..f1844dd 100644
> --- a/crypto/lzo.c
> +++ b/crypto/lzo.c
> @@ -80,6 +80,22 @@ static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
>
> }
>
> +static int lzo_decompress_noctx(const u8 *src, unsigned int slen,
> + u8 *dst, unsigned int *dlen)
> +{
> + int err;
> + size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
> +
> + err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
> +
> + if (err != LZO_E_OK)
> + return -EINVAL;
> +
> + *dlen = tmp_len;
> + return 0;
> +
just do
static int lzo_decompress_noctx(const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen)
{
return lzo_decompress(NULL, src, len, dst, dlen);
}
?
-ss
> +}
> +
> static struct crypto_alg alg = {
> .cra_name = "lzo",
> .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
> @@ -91,7 +107,7 @@ static struct crypto_alg alg = {
> .coa_compress = lzo_compress,
> .coa_decompress = lzo_decompress,
> .coa_compress_noctx = NULL,
> - .coa_decompress_noctx = NULL } }
> + .coa_decompress_noctx = lzo_decompress_noctx } }
> };
>
> static int __init lzo_mod_init(void)
> --
> 1.9.1
>
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