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 <herberg@gondor.apana.org.au>,
        David Miller <davem@davemloft.org>,
        linux-crypto@vger.kernel.org, Hannes Reinecke <hare@suse.de>,
        Chaitanya Kulkarni <kch@nvidia.com>,
        Himanshu Madhani <himanshu.madhani@oracle.com>
Subject: [PATCH 01/12] crypto: add crypto_has_shash()
Date:   Mon, 22 Nov 2021 08:47:16 +0100
Message-Id: <20211122074727.25988-2-hare@suse.de>
In-Reply-To: <20211122074727.25988-1-hare@suse.de>
References: <20211122074727.25988-1-hare@suse.de>
MIME-Version: 1.0
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Add helper function to determine if a given synchronous hash is supported.

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

diff --git a/crypto/shash.c b/crypto/shash.c
index 0a0a50cb694f..4c88e63b3350 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -521,6 +521,12 @@ struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_shash);
 
+int crypto_has_shash(const char *alg_name, u32 type, u32 mask)
+{
+	return crypto_type_has_alg(alg_name, &crypto_shash_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_has_shash);
+
 static int shash_prepare_alg(struct shash_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;
diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index f140e4643949..f5841992dc9b 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -718,6 +718,8 @@ static inline void ahash_request_set_crypt(struct ahash_request *req,
 struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
 					u32 mask);
 
+int crypto_has_shash(const char *alg_name, u32 type, u32 mask);
+
 static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
 {
 	return &tfm->base;
-- 
2.29.2