Re: [PATCH v4 2/5] crypto: AF_ALG: add AEAD support

Am Freitag, 5. Dezember 2014, 23:46:06 schrieb Herbert Xu:

Hi Herbert,

quoted

+static struct proto_ops algif_aead_ops = {
+	.family		=	PF_ALG,
+
+	.connect	=	sock_no_connect,
+	.socketpair	=	sock_no_socketpair,
+	.getname	=	sock_no_getname,
+	.ioctl		=	sock_no_ioctl,
+	.listen		=	sock_no_listen,
+	.shutdown	=	sock_no_shutdown,
+	.getsockopt	=	sock_no_getsockopt,
+	.mmap		=	sock_no_mmap,
+	.bind		=	sock_no_bind,
+	.accept		=	sock_no_accept,
+
+	.release	=	af_alg_release,
+	.sendmsg	=	aead_sendmsg,
+	.sendpage	=	aead_sendpage,
+	.recvmsg	=	aead_recvmsg,
+	.poll		=	aead_poll,
+	.setsockopt	=	aead_setsockopt,

No it should go into the parent setsockopt.  Perhaps add a setsockopt
to af_alg_type in order to keep this out of the generic code.

What about adding a setauthsize to af_alg_type that is called from the parent 
setsockopt? I would like to keep all user space interfaces as close together 
as possible. With a new setsockopt callback, I fear that user space interface 
handling may be scattered around.

Currently I am simply thinking about the following:

partent setsockopt:

        case ALG_SET_AEAD_AUTHSIZE:
                if (sock->state == SS_CONNECTED)
                        goto unlock;
                if (!type->setauthsize)
                        goto unlock;
                err = type->setauthsize(ask->private, optlen);

af_alg_type:

int (*setauthsize)(void *private, unsigned int authsize);

-- 
Ciao
Stephan