From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 20 Apr 2015 05:39:00 +0000 (+0800)
Subject: crypto: api - Add crypto_alg_extsize helper
X-Git-Tag: v4.1.12-92~24^2~111
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=fb673443483a933db86e25d63479c4b0674ca1ca;p=users%2Fjedix%2Flinux-maple.git

crypto: api - Add crypto_alg_extsize helper

This patch adds a crypto_alg_extsize helper that can be used
by algorithm types such as pcompress and shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 38d21433112c25acdb8e93f60be629e7a1c27a26)

Orabug: 24614549

Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com>
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>
---

diff --git a/crypto/algapi.c b/crypto/algapi.c
index d2627a3d4ed8b..a60f62625b5f4 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -964,6 +964,12 @@ void crypto_xor(u8 *dst, const u8 *src, unsigned int size)
 }
 EXPORT_SYMBOL_GPL(crypto_xor);
 
+unsigned int crypto_alg_extsize(struct crypto_alg *alg)
+{
+	return alg->cra_ctxsize;
+}
+EXPORT_SYMBOL_GPL(crypto_alg_extsize);
+
 static int __init crypto_algapi_init(void)
 {
 	crypto_init_proc();
diff --git a/crypto/internal.h b/crypto/internal.h
index bd39bfc92eabc..ed7a70c6dbc1f 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -103,6 +103,8 @@ int crypto_register_notifier(struct notifier_block *nb);
 int crypto_unregister_notifier(struct notifier_block *nb);
 int crypto_probing_notify(unsigned long val, void *v);
 
+unsigned int crypto_alg_extsize(struct crypto_alg *alg);
+
 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 {
 	atomic_inc(&alg->cra_refcnt);