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;
+
+}
+
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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