Re: [PATCH v2 4/8] crypto/lz4hc: support decompress_noctx

[Sergey Senozhatsky]

On (08/20/15 15:35), Joonsoo Kim wrote:
 
 lz4hc'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@lge.com
 ---
  crypto/lz4hc.c | 17 -
  1 file changed, 16 insertions(+), 1 deletion(-)
 
 diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
 index bcf0baa..a529620 100644
 --- a/crypto/lz4hc.c
 +++ b/crypto/lz4hc.c
 @@ -76,6 +76,21 @@ static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, 
 const u8 *src,
   return err;
  }
  
 +static int lz4hc_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 lz4hc_decompress_noctx(const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen)
{
return lz4hc_decompress_crypto(NULL, );
}

?

-ss

  static struct crypto_alg alg_lz4hc = {
   .cra_name   = lz4hc,
   .cra_flags  = CRYPTO_ALG_TYPE_COMPRESS,
 @@ -88,7 +103,7 @@ static struct crypto_alg alg_lz4hc = {
   .coa_compress   = lz4hc_compress_crypto,
   .coa_decompress = lz4hc_decompress_crypto,
   .coa_compress_noctx = NULL,
 - .coa_decompress_noctx   = NULL } }
 + .coa_decompress_noctx   = lz4hc_decompress_noctx } }
  };
  
  static int __init lz4hc_mod_init(void)
 -- 
 1.9.1
 
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[PATCH v2 4/8] crypto/lz4hc: support decompress_noctx

[Joonsoo Kim]

lz4hc'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@lge.com
---
 crypto/lz4hc.c | 17 -
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
index bcf0baa..a529620 100644
--- a/crypto/lz4hc.c
+++ b/crypto/lz4hc.c
@@ -76,6 +76,21 @@ static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, 
const u8 *src,
return err;
 }
 
+static int lz4hc_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_lz4hc = {
.cra_name   = lz4hc,
.cra_flags  = CRYPTO_ALG_TYPE_COMPRESS,
@@ -88,7 +103,7 @@ static struct crypto_alg alg_lz4hc = {
.coa_compress   = lz4hc_compress_crypto,
.coa_decompress = lz4hc_decompress_crypto,
.coa_compress_noctx = NULL,
-   .coa_decompress_noctx   = NULL } }
+   .coa_decompress_noctx   = lz4hc_decompress_noctx } }
 };
 
 static int __init lz4hc_mod_init(void)
-- 
1.9.1

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