Re: [net-next v4 PATCH 1/7] hsr: enhance netlink socket interface to support PRP

[Murali Karicheri]

Hi Randy

On 7/20/20 2:37 PM, Randy Dunlap wrote:
> On 7/20/20 9:57 AM, Murali Karicheri wrote:
> > diff --git a/net/hsr/Kconfig b/net/hsr/Kconfig
> > index 8095b034e76e..e2e396870230 100644
> > --- a/net/hsr/Kconfig
> > +++ b/net/hsr/Kconfig
> > @@ -4,24 +4,35 @@
> >   #
> >   
> >   config HSR
> > -	tristate "High-availability Seamless Redundancy (HSR)"
> > -	help
> > +	tristate "High-availability Seamless Redundancy (HSR & PRP)"
> > +	---help---
>
> Just use:
> 	help
>
> The use of "---help---" has been discontinued.
Ok. Will update.
> > +	  This enables IEC 62439 defined High-availability Seamless
> > +	  Redundancy (HSR) and Parallel Redundancy Protocol (PRP).
> > +
> >   	  If you say Y here, then your Linux box will be able to act as a
> > -	  DANH ("Doubly attached node implementing HSR"). For this to work,
> > -	  your Linux box needs (at least) two physical Ethernet interfaces,
> > -	  and it must be connected as a node in a ring network together with
> > -	  other HSR capable nodes.
> > +	  DANH ("Doubly attached node implementing HSR") or DANP ("Doubly
> > +	  attached node implementing PRP"). For this to work, your Linux box
> > +	  needs (at least) two physical Ethernet interfaces.
> > +
> > +	  For DANH, it must be connected as a node in a ring network together
> > +	  with other HSR capable nodes. All Ethernet frames sent over the hsr
>
> 	                                                                  HSR
>
> > +	  device will be sent in both directions on the ring (over both slave
> > +	  ports), giving a redundant, instant fail-over network. Each HSR node
> > +	  in the ring acts like a bridge for HSR frames, but filters frames
> > +	  that have been forwarded earlier.
> >   
> > -	  All Ethernet frames sent over the hsr device will be sent in both
> > -	  directions on the ring (over both slave ports), giving a redundant,
> > -	  instant fail-over network. Each HSR node in the ring acts like a
> > -	  bridge for HSR frames, but filters frames that have been forwarded
> > -	  earlier.
> > +	  For DANP, it must be connected as a node connecting to two
> > +	  separate networks over the two slave interfaces. Like HSR, Ethernet
> > +	  frames sent over the prp device will be sent to both networks giving
>
> 	                       PRP
>
> > +	  a redundant, instant fail-over network. Unlike HSR, PRP networks
> > +	  can have Singly Attached Nodes (SAN) such as PC, printer, bridges
> > +	  etc and will be able to communicate with DANP nodes.
> >   
> >   	  This code is a "best effort" to comply with the HSR standard as
> >   	  described in IEC 62439-3:2010 (HSRv0) and IEC 62439-3:2012 (HSRv1),
> > -	  but no compliancy tests have been made. Use iproute2 to select
> > -	  the version you desire.
> > +	  and PRP standard described in IEC 62439-4:2012 (PRP), but no
> > +	  compliancy tests have been made. Use iproute2 to select the protocol
> > +	  you would like to use.
> >   
> >   	  You need to perform any and all necessary tests yourself before
> >   	  relying on this code in a safety critical system!
>
> thanks.

--
Murali Karicheri
Texas Instruments