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;
+}
+
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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