linux-kernel - [RFC][PATCH 1/9] crypto: introduce CRYPTO_ALG_TFM_MAY

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Date:	Mon, 21 Sep 2015 22:13:41 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Joonsoo Kim <js1304@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Stephan Mueller <smueller@...onox.de>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC][PATCH 1/9] crypto: introduce CRYPTO_ALG_TFM_MAY_SHARE flag

Set CRYPTO_ALG_TFM_MAY_SHARE ->cra_flags when algorithm support
shared tfm.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
---
 include/linux/crypto.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index e71cb70..66f10f8 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -102,6 +102,11 @@
 #define CRYPTO_ALG_INTERNAL		0x00002000
 
 /*
+ * Mark that algorithm can use shared tfm
+ */
+#define CRYPTO_ALG_TFM_MAY_SHARE	0x00004000
+
+/*
  * Transform masks and values (for crt_flags).
  */
 #define CRYPTO_TFM_REQ_MASK		0x000fff00
@@ -648,6 +653,11 @@ static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
 	return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
 }
 
+static inline u32 crypto_tfm_may_share(struct crypto_tfm *tfm)
+{
+	return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TFM_MAY_SHARE;
+}
+
 static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
 {
 	return tfm->__crt_alg->cra_blocksize;
-- 
2.6.0.rc2.10.gf4d9753

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