linux-kernel - Re: [PATCH v17 05/12] KEYS: Move KEY_LOOKUP_ to include/linux/key.h and define KEY_LOOKUP

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Date:   Tue, 06 Sep 2022 14:28:55 +0200
From:   Roberto Sassu <roberto.sassu@...weicloud.com>
To:     kpsingh@...nel.org
Cc:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, deso@...teo.net, dhowells@...hat.com,
        haoluo@...gle.com, jmorris@...ei.org, john.fastabend@...il.com,
        jolsa@...nel.org, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-security-module@...r.kernel.org, martin.lau@...ux.dev,
        memxor@...il.com, mingo@...hat.com, mykolal@...com,
        paul@...l-moore.com, roberto.sassu@...wei.com, rostedt@...dmis.org,
        sdf@...gle.com, serge@...lyn.com, shuah@...nel.org,
        song@...nel.org, yhs@...com, Jarkko Sakkinen <jarkko@...nel.org>
Subject: Re: [PATCH v17 05/12] KEYS: Move KEY_LOOKUP_ to include/linux/key.h
 and define KEY_LOOKUP_ALL

On Tue, 2022-09-06 at 15:26 +0300, Jarkko Sakkinen wrote:
> On Tue, Sep 06, 2022 at 02:15:06PM +0200, Roberto Sassu wrote:
> > From: Roberto Sassu <roberto.sassu@...wei.com>
> > 
> > In preparation for the patch that introduces the
> > bpf_lookup_user_key() eBPF
> > kfunc, move KEY_LOOKUP_ definitions to include/linux/key.h, to be
> > able to
> > validate the kfunc parameters. Add them to enum key_lookup_flag, so
> > that
> > all the current ones and the ones defined in the future are
> > automatically
> > exported through BTF and available to eBPF programs.
> > 
> > Also, add KEY_LOOKUP_ALL to the enum, with the logical OR of
> > currently
> > defined flags as value, to facilitate checking whether a variable
> > contains
> > only those flags.
> > 
> > Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> > ---
> >  include/linux/key.h      | 6 ++++++
> >  security/keys/internal.h | 2 --
> >  2 files changed, 6 insertions(+), 2 deletions(-)
> > 
> > diff --git a/include/linux/key.h b/include/linux/key.h
> > index 7febc4881363..d27477faf00d 100644
> > --- a/include/linux/key.h
> > +++ b/include/linux/key.h
> > @@ -88,6 +88,12 @@ enum key_need_perm {
> >  	KEY_DEFER_PERM_CHECK,	/* Special: permission check is
> > deferred */
> >  };
> >  
> > +enum key_lookup_flag {
> > +	KEY_LOOKUP_CREATE = 0x01,
> > +	KEY_LOOKUP_PARTIAL = 0x02,
> > +	KEY_LOOKUP_ALL = (KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL),
> > +};
> > +
> >  struct seq_file;
> >  struct user_struct;
> >  struct signal_struct;
> > diff --git a/security/keys/internal.h b/security/keys/internal.h
> > index 9b9cf3b6fcbb..3c1e7122076b 100644
> > --- a/security/keys/internal.h
> > +++ b/security/keys/internal.h
> > @@ -165,8 +165,6 @@ extern struct key *request_key_and_link(struct
> > key_type *type,
> >  
> >  extern bool lookup_user_key_possessed(const struct key *key,
> >  				      const struct key_match_data
> > *match_data);
> > -#define KEY_LOOKUP_CREATE	0x01
> > -#define KEY_LOOKUP_PARTIAL	0x02
> >  
> >  extern long join_session_keyring(const char *name);
> >  extern void key_change_session_keyring(struct callback_head
> > *twork);
> > -- 
> > 2.25.1
> > 
> 
> Thanks,
> 
> Acked-by: Jarkko Sakkinen <jarkko@...nel.org>

Thanks Jarkko.

KP, ok also for you?

Thanks

Roberto