Re: [PATCH 7/9] semanage: Update semanage to allow runtime labeling of Infiniband Pkeys

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On Thu, 2017-05-11 at 22:51 +0000, Daniel Jurgens wrote:
> On 5/10/2017 2:22 PM, Stephen Smalley wrote:
> > On Tue, 2017-05-09 at 23:50 +0300, Dan Jurgens wrote:
> > > From: Daniel Jurgens <danielj@xxxxxxxxxxxx>
> > > 
> > > 
> > >  libsepol/src/ibpkeys.c                        |  264
> > > ++++++++++++++
> > >  python/semanage/semanage                      |   60 +++-
> > >  python/semanage/seobject.py                   |  253
> > > +++++++++++++
> > >  28 files changed, 2159 insertions(+), 17 deletions(-)
> > 
> > That's a lot of code.  Did you look at whether you could generalize
> > the
> > port record stuff at all to see if we could factor out common
> > helpers
> > or anything?  I guess this is consistent with the current code, but
> > it
> > seems like a lot of very similar code being duplicated and then
> > slightly tweaked.
> 
> I don't see a good way to generalize.  The high/low pkey/port part
> overlaps, but all that code is compact anyway.  To make it work for
> both would complicate it to figure out the correct key/ocontext to
> use.  The protocol and subnet_prefix handling is most of the code,
> and it's very different.

Yes, looking at it more closely, I agree.  Thanks for looking at it
anyway.

> > 
> > >  
> > >  	create_dir(newroot_path(), 0o755)
> > > diff --git a/libsepol/VERSION b/libsepol/VERSION
> > > index 5154b3f..e70b452 100644
> > > --- a/libsepol/VERSION
> > > +++ b/libsepol/VERSION
> > > @@ -1 +1 @@
> > > -2.6
> > > +2.6.0
> > 
> > Extraneous change?
> 
> Yes.
> > > +struct sepol_ibpkey {
> > > +	/* Subnet prefix */
> > > +	char *subnet_prefix;
> > > +	size_t subnet_prefix_sz;
> > 
> > Do we need support for variable-length subnet prefix?  Can it
> > change?
> 
> It doesn't need to be variable.  I'll remove.
> > > +#ifdef DARWIN
> > > +	memcpy(subnet_prefix_bytes, in_addr.s6_addr, 16);
> > > +#else
> > > +	memcpy(subnet_prefix_bytes, in_addr.s6_addr32, 16);
> > > +#endif
> > 
> > Just reduce to always using s6_addr
> 
> Done
> > > +static int ibpkey_alloc_subnet_prefix(sepol_handle_t *handle,
> > > +				      char **subnet_prefix,
> > > +				      size_t *subnet_prefix_sz)
> > > +{
> > > +	char *tmp_subnet_prefix = malloc(16);
> > > +	size_t tmp_subnet_prefix_sz = 16;
> > 
> > No magic constants, and definitely not repeatedly used.
> 
> Done



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