Re: [PATCH 2/5] crypto: ccm - use template array registering API to simplify the code

[Eric Biggers]

On Wed, Jan 16, 2019 at 10:50:31AM +0800, Xiongfeng Wang wrote:
> Use crypto template array registering API to simplify the code.
> 
> Signed-off-by: Xiongfeng Wang <xiongfeng.wang@xxxxxxxxxx>
> ---
>  crypto/ccm.c | 81 +++++++++++++++++++-----------------------------------------
>  1 file changed, 26 insertions(+), 55 deletions(-)
> 
> diff --git a/crypto/ccm.c b/crypto/ccm.c
> index b242fd0..8949aa2 100644
> --- a/crypto/ccm.c
> +++ b/crypto/ccm.c
> @@ -589,12 +589,6 @@ static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb)
>  					mac_name);
>  }
>  
> -static struct crypto_template crypto_ccm_tmpl = {
> -	.name = "ccm",
> -	.create = crypto_ccm_create,
> -	.module = THIS_MODULE,
> -};
> -
>  static int crypto_ccm_base_create(struct crypto_template *tmpl,
>  				  struct rtattr **tb)
>  {
> @@ -618,12 +612,6 @@ static int crypto_ccm_base_create(struct crypto_template *tmpl,
>  					cipher_name);
>  }
>  
> -static struct crypto_template crypto_ccm_base_tmpl = {
> -	.name = "ccm_base",
> -	.create = crypto_ccm_base_create,
> -	.module = THIS_MODULE,
> -};
> -
>  static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key,
>  				 unsigned int keylen)
>  {
> @@ -854,12 +842,6 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl,
>  	goto out;
>  }
>  
> -static struct crypto_template crypto_rfc4309_tmpl = {
> -	.name = "rfc4309",
> -	.create = crypto_rfc4309_create,
> -	.module = THIS_MODULE,
> -};
> -
>  static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent,
>  				     const u8 *inkey, unsigned int keylen)
>  {
> @@ -999,51 +981,40 @@ static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb)
>  	return err;
>  }
>  
> -static struct crypto_template crypto_cbcmac_tmpl = {
> -	.name = "cbcmac",
> -	.create = cbcmac_create,
> -	.free = shash_free_instance,
> -	.module = THIS_MODULE,
> +static struct crypto_template crypto_ccm_tmpl[] = {

Add an 's':  'crypto_ccm_tmpls'.  Likewise everywhere else in this patch series
where you're defining an array of crypto_templates.

> +	{
> +		.name = "cbcmac",
> +		.create = cbcmac_create,
> +		.free = shash_free_instance,
> +		.module = THIS_MODULE,
> +	},
> +	{

In a list of struct definitions, the { should be on the same line as the
previous '},'.  Likewise everywhere else in this patch series where you're
defining an array of crypto_templates.

> +		.name = "ccm_base",
> +		.create = crypto_ccm_base_create,
> +		.module = THIS_MODULE,
> +	},
> +	{
> +		.name = "ccm",
> +		.create = crypto_ccm_create,
> +		.module = THIS_MODULE,
> +	},
> +	{
> +		.name = "rfc4309",
> +		.create = crypto_rfc4309_create,
> +		.module = THIS_MODULE,
> +	},
>  };
>  
>  static int __init crypto_ccm_module_init(void)
>  {
> -	int err;
> -
> -	err = crypto_register_template(&crypto_cbcmac_tmpl);
> -	if (err)
> -		goto out;
> -
> -	err = crypto_register_template(&crypto_ccm_base_tmpl);
> -	if (err)
> -		goto out_undo_cbcmac;
> -
> -	err = crypto_register_template(&crypto_ccm_tmpl);
> -	if (err)
> -		goto out_undo_base;
> -
> -	err = crypto_register_template(&crypto_rfc4309_tmpl);
> -	if (err)
> -		goto out_undo_ccm;
> -
> -out:
> -	return err;
> -
> -out_undo_ccm:
> -	crypto_unregister_template(&crypto_ccm_tmpl);
> -out_undo_base:
> -	crypto_unregister_template(&crypto_ccm_base_tmpl);
> -out_undo_cbcmac:
> -	crypto_register_template(&crypto_cbcmac_tmpl);
> -	goto out;
> +	return crypto_register_templates(crypto_ccm_tmpl,
> +			ARRAY_SIZE(crypto_ccm_tmpl));
>  }

Please fix the indentation here, so the continuation line is aligned.

	return crypto_register_templates(crypto_ccm_tmpl,
					 ARRAY_SIZE(crypto_ccm_tmpl));

Likewise everywhere else in the patch series where you're registering or
unregistering templates.

>  
>  static void __exit crypto_ccm_module_exit(void)
>  {
> -	crypto_unregister_template(&crypto_rfc4309_tmpl);
> -	crypto_unregister_template(&crypto_ccm_tmpl);
> -	crypto_unregister_template(&crypto_ccm_base_tmpl);
> -	crypto_unregister_template(&crypto_cbcmac_tmpl);
> +	crypto_unregister_templates(crypto_ccm_tmpl,
> +			ARRAY_SIZE(crypto_ccm_tmpl));
>  }

Same here.

	crypto_unregister_templates(crypto_ccm_tmpl,
				    ARRAY_SIZE(crypto_ccm_tmpl));

>  
>  module_init(crypto_ccm_module_init);
> -- 
> 1.7.12.4
> 

Thanks,

- Eric