From 38d21433112c25acdb8e93f60be629e7a1c27a26 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 20 Apr 2015 13:39:00 +0800
Subject: [PATCH] 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>
---
crypto/algapi.c | 6 ++++++
crypto/internal.h | 2 ++
2 files changed, 8 insertions(+)
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);
--
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