From:   Hannes Reinecke <hare@suse.de>
To:     Sagi Grimberg <sagi@grimberg.me>
Cc:     Christoph Hellwig <hch@lst.de>, Keith Busch <keith.busch@wdc.com>,
        linux-nvme@lists.infradead.org,
        Herbert Xu <herbert@gondor.apana.org.au>,
        David Miller <davem@davemloft.net>,
        linux-crypto@vger.kernel.org, Hannes Reinecke <hare@suse.de>,
        Chaitanya Kulkarni <kch@nvidia.com>
Subject: [PATCH 02/12] crypto: add crypto_has_kpp()
Date:   Fri, 12 Nov 2021 13:59:18 +0100
Message-Id: <20211112125928.97318-3-hare@suse.de>
In-Reply-To: <20211112125928.97318-1-hare@suse.de>
References: <20211112125928.97318-1-hare@suse.de>
MIME-Version: 1.0
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Precedence: bulk

Add helper function to determine if a given key-agreement protocol
primitive is supported.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
---
 crypto/kpp.c         | 6 ++++++
 include/crypto/kpp.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/crypto/kpp.c b/crypto/kpp.c
index 313b2c699963..416e8a1a03ee 100644
--- a/crypto/kpp.c
+++ b/crypto/kpp.c
@@ -87,6 +87,12 @@ struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
 
+int crypto_has_kpp(const char *alg_name, u32 type, u32 mask)
+{
+	return crypto_type_has_alg(alg_name, &crypto_kpp_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_has_kpp);
+
 static void kpp_prepare_alg(struct kpp_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;
diff --git a/include/crypto/kpp.h b/include/crypto/kpp.h
index cccceadc164b..24d01e9877c1 100644
--- a/include/crypto/kpp.h
+++ b/include/crypto/kpp.h
@@ -104,6 +104,8 @@ struct kpp_alg {
  */
 struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask);
 
+int crypto_has_kpp(const char *alg_name, u32 type, u32 mask);
+
 static inline struct crypto_tfm *crypto_kpp_tfm(struct crypto_kpp *tfm)
 {
 	return &tfm->base;
-- 
2.29.2