crypto: geniv - convert to new way of freeing instances

Convert the "seqiv" template to the new way of freeing instances where a ->free() method is installed to the instance struct itself. Also remove the unused implementation of the old way of freeing instances from the "echainiv" template, since it's already using the new way too. In doing this, also simplify the code by making the helper function aead_geniv_alloc() install the ->free() method, instead of making seqiv and echainiv do this themselves. This is analogous to how skcipher_alloc_instance_simple() works. This will allow removing support for the old way of freeing instances. Signed-off-by: Eric Biggers <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
josf · Jan 9, 2020 · 0f8f6d8 · 0f8f6d8
1 parent 48fb3e5
commit 0f8f6d8
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Showing 4 changed files with 16 additions and 40 deletions.
diff --git a/crypto/echainiv.c b/crypto/echainiv.c
@@ -133,29 +133,17 @@ static int echainiv_aead_create(struct crypto_template *tmpl,
 	inst->alg.base.cra_ctxsize = sizeof(struct aead_geniv_ctx);
 	inst->alg.base.cra_ctxsize += inst->alg.ivsize;
 
-	inst->free = aead_geniv_free;
-
 	err = aead_register_instance(tmpl, inst);
-	if (err)
-		goto free_inst;
-
-out:
-	return err;
-
+	if (err) {
 free_inst:
-	aead_geniv_free(inst);
-	goto out;
-}
-
-static void echainiv_free(struct crypto_instance *inst)
-{
-	aead_geniv_free(aead_instance(inst));
+		inst->free(inst);
+	}
+	return err;
 }
 
 static struct crypto_template echainiv_tmpl = {
 	.name = "echainiv",
 	.create = echainiv_aead_create,
-	.free = echainiv_free,
 	.module = THIS_MODULE,
 };
 

diff --git a/crypto/geniv.c b/crypto/geniv.c
@@ -32,6 +32,12 @@ static int aead_geniv_setauthsize(struct crypto_aead *tfm,
 	return crypto_aead_setauthsize(ctx->child, authsize);
 }
 
+static void aead_geniv_free(struct aead_instance *inst)
+{
+	crypto_drop_aead(aead_instance_ctx(inst));
+	kfree(inst);
+}
+
 struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 				       struct rtattr **tb, u32 type, u32 mask)
 {
@@ -100,6 +106,8 @@ struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 	inst->alg.ivsize = ivsize;
 	inst->alg.maxauthsize = maxauthsize;
 
+	inst->free = aead_geniv_free;
+
 out:
 	return inst;
 
@@ -112,13 +120,6 @@ struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 }
 EXPORT_SYMBOL_GPL(aead_geniv_alloc);
 
-void aead_geniv_free(struct aead_instance *inst)
-{
-	crypto_drop_aead(aead_instance_ctx(inst));
-	kfree(inst);
-}
-EXPORT_SYMBOL_GPL(aead_geniv_free);
-
 int aead_init_geniv(struct crypto_aead *aead)
 {
 	struct aead_geniv_ctx *ctx = crypto_aead_ctx(aead);

diff --git a/crypto/seqiv.c b/crypto/seqiv.c
@@ -18,8 +18,6 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 
-static void seqiv_free(struct crypto_instance *inst);
-
 static void seqiv_aead_encrypt_complete2(struct aead_request *req, int err)
 {
 	struct aead_request *subreq = aead_request_ctx(req);
@@ -159,15 +157,11 @@ static int seqiv_aead_create(struct crypto_template *tmpl, struct rtattr **tb)
 	inst->alg.base.cra_ctxsize += inst->alg.ivsize;
 
 	err = aead_register_instance(tmpl, inst);
-	if (err)
-		goto free_inst;
-
-out:
-	return err;
-
+	if (err) {
 free_inst:
-	aead_geniv_free(inst);
-	goto out;
+		inst->free(inst);
+	}
+	return err;
 }
 
 static int seqiv_create(struct crypto_template *tmpl, struct rtattr **tb)
@@ -184,15 +178,9 @@ static int seqiv_create(struct crypto_template *tmpl, struct rtattr **tb)
 	return seqiv_aead_create(tmpl, tb);
 }
 
-static void seqiv_free(struct crypto_instance *inst)
-{
-	aead_geniv_free(aead_instance(inst));
-}
-
 static struct crypto_template seqiv_tmpl = {
 	.name = "seqiv",
 	.create = seqiv_create,
-	.free = seqiv_free,
 	.module = THIS_MODULE,
 };
 

diff --git a/include/crypto/internal/geniv.h b/include/crypto/internal/geniv.h
@@ -21,7 +21,6 @@ struct aead_geniv_ctx {
 
 struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 				       struct rtattr **tb, u32 type, u32 mask);
-void aead_geniv_free(struct aead_instance *inst);
 int aead_init_geniv(struct crypto_aead *tfm);
 void aead_exit_geniv(struct crypto_aead *tfm);