[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1440052504-15442-3-git-send-email-iamjoonsoo.kim@lge.com>
Date: Thu, 20 Aug 2015 15:34:58 +0900
From: Joonsoo Kim <js1304@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Minchan Kim <minchan@...nel.org>, Nitin Gupta <ngupta@...are.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Stephan Mueller <smueller@...onox.de>,
Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v2 2/8] crypto/lzo: support decompress_noctx
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@....com>
---
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists