linux-kernel - Re: [PATCH 2/6] security/keys/encrypted: Clean up request_trusted

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Message-Id: <1553044252.4899.165.camel@linux.ibm.com>
Date:   Tue, 19 Mar 2019 21:10:52 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     keyrings@...r.kernel.org, James Bottomley <jejb@...ux.ibm.com>,
        David Howells <dhowells@...hat.com>,
        Vishal L Verma <vishal.l.verma@...el.com>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/6] security/keys/encrypted: Clean up
 request_trusted_key()

On Tue, 2019-03-19 at 17:20 -0700, Dan Williams wrote:
> On Tue, Mar 19, 2019 at 5:07 PM Mimi Zohar <zohar@...ux.ibm.com> wrote:
> > On Mon, 2019-03-18 at 23:06 -0700, Dan Williams wrote:
> 
> > > diff --git a/security/keys/key.c b/security/keys/key.c
> > > index 696f1c092c50..9045b62afb04 100644
> > > --- a/security/keys/key.c
> > > +++ b/security/keys/key.c
> > > @@ -706,6 +706,7 @@ struct key_type *key_type_lookup(const char *type)
> > >  found_kernel_type:
> > >       return ktype;
> > >  }
> > > +EXPORT_SYMBOL_GPL(key_type_lookup);
> 
> This needs to be moved to patch1.
> 
> > Only the kernel is calling key_type_lookup().  Why does
> > key_type_lookup() need to be exported?
> 
> This patch series adds several new callers outside of keys-subsystem
> core that need this export, the first one being encrypted-keys itself
> in patch1.

It's needed, because they could be compiled as kernel modules, not
builtin (eg. EVM).

Mimi

> 
> drivers/nvdimm/security.c:57:   type = key_type_lookup("encrypted");
> fs/ecryptfs/keystore.c:1627:    type = key_type_lookup("encrypted");
> security/integrity/evm/evm_crypto.c:361:        type =
> key_type_lookup("encrypted");
> security/keys/encrypted-keys/encrypted.c:440:   type =
> key_type_lookup("trusted");
>