linux-kernel - Re: [PATCH v3] libsepol: Support functionfs

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Message-ID: <CAEjxPJ5i4SPvtfz6wh4xnkr7Et0jBrtcCYe_rX-ZiexVwuCeow@mail.gmail.com>
Date: Wed, 10 Sep 2025 10:17:04 -0400
From: Stephen Smalley <stephen.smalley.work@...il.com>
To: Neill Kapron <nkapron@...gle.com>
Cc: Paul Moore <paul@...l-moore.com>, Ondrej Mosnacek <omosnace@...hat.com>, kernel-team@...roid.com, 
	linux-kernel@...r.kernel.org, selinux@...r.kernel.org
Subject: Re: [PATCH v3] libsepol: Support functionfs_seclabel policycap

On Wed, Sep 10, 2025 at 10:11 AM Stephen Smalley
<stephen.smalley.work@...il.com> wrote:
>
> On Thu, Aug 28, 2025 at 1:05 PM Neill Kapron <nkapron@...gle.com> wrote:
> >
> > This adds the necessary userspace pieces to support the
> > functionfs_seclabel policycap which enables per-file labels in
> > functionfs and the ability for userspace to apply the labels.
> >
> > With the policycap disabled, legacy behaviors are maintained and
> > per-file labeling is disallowed.
> >
> > Signed-off-by: Neill Kapron <nkapron@...gle.com>
>
> Acked-by: Stephen Smalley <stephen.smalley.work@...il.com>

Thanks, merged.
>
> >
> > Changes since v2:
> > - Sending as separate patches
> > ---
> >  libsepol/include/sepol/policydb/polcaps.h | 1 +
> >  libsepol/src/polcaps.c                    | 1 +
> >  2 files changed, 2 insertions(+)
> >
> > diff --git a/libsepol/include/sepol/policydb/polcaps.h b/libsepol/include/sepol/policydb/polcaps.h
> > index 0835ea21..bbaebf1a 100644
> > --- a/libsepol/include/sepol/policydb/polcaps.h
> > +++ b/libsepol/include/sepol/policydb/polcaps.h
> > @@ -19,6 +19,7 @@ enum {
> >         POLICYDB_CAP_NETLINK_XPERM,
> >         POLICYDB_CAP_NETIF_WILDCARD,
> >         POLICYDB_CAP_GENFS_SECLABEL_WILDCARD,
> > +       POLICYDB_CAP_FUNCTIONFS_SECLABEL,
> >         __POLICYDB_CAP_MAX
> >  };
> >  #define POLICYDB_CAP_MAX (__POLICYDB_CAP_MAX - 1)
> > diff --git a/libsepol/src/polcaps.c b/libsepol/src/polcaps.c
> > index 7ac0ae7c..83eb6143 100644
> > --- a/libsepol/src/polcaps.c
> > +++ b/libsepol/src/polcaps.c
> > @@ -18,6 +18,7 @@ static const char * const polcap_names[POLICYDB_CAP_MAX + 1] = {
> >         [POLICYDB_CAP_NETLINK_XPERM]                    = "netlink_xperm",
> >         [POLICYDB_CAP_NETIF_WILDCARD]                   = "netif_wildcard",
> >         [POLICYDB_CAP_GENFS_SECLABEL_WILDCARD]          = "genfs_seclabel_wildcard",
> > +       [POLICYDB_CAP_FUNCTIONFS_SECLABEL]              = "functionfs_seclabel",
> >  };
> >
> >  int sepol_polcap_getnum(const char *name)
> > --
> > 2.51.0.318.gd7df087d1a-goog
> >