From: Jiri Pirko <j...@mellanox.com> Yotam says:
Previous patchset introduced support for offloading multicast MFC routes to the Spectrum hardware. As described in that patchset, no partial offloading is supported, i.e if a route has one output interface which is not a valid offloadable device (e.g. pimreg device, dummy device, management NIC), the route is trapped to the CPU and the forwarding is done in slow-path. Add support for partial offloading of multicast routes, by letting the hardware to forward the packet to all the in-hardware devices, while the kernel ipmr module will continue forwarding to all other interfaces. Similarly to the bridge, the kernel ipmr module will forward a marked packet to an interface only if the interface has a different parent ID than the packet's ingress interfaces. The first patch introduces the offload_mr_fwd_mark skb field, which can be used by offloading drivers to indicate that a packet had already gone through multicast forwarding in hardware, similarly to the offload_fwd_mark field that indicates that a packet had already gone through L2 forwarding in hardware. Patches 2 and 3 change the ipmr module to not forward packets that had already been forwarded by the hardware, i.e. packets that are marked with offload_mr_fwd_mark and the ingress VIF shares the same parent ID with the egress VIF. Patches 4, 5, 6 and 7 add the support in the mlxsw Spectrum driver for trap and forward routes, while marking the trapped packets with the offload_mr_fwd_mark. Yotam Gigi (7): skbuff: Add the offload_mr_fwd_mark field ipv4: ipmr: Add the parent ID field to VIF struct ipv4: ipmr: Don't forward packets already forwarded by hardware mlxsw: acl: Introduce ACL trap and forward action mlxsw: spectrum: Add trap for multicast trap-and-forward routes mlxsw: spectrum: mr_tcam: Add trap-and-forward multicast route mlxsw: spectrum: mr: Support trap-and-forward routes .../mellanox/mlxsw/core_acl_flex_actions.c | 17 ++++++++ .../mellanox/mlxsw/core_acl_flex_actions.h | 2 + drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 13 ++++++ drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c | 17 ++++---- drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h | 1 + .../net/ethernet/mellanox/mlxsw/spectrum_mr_tcam.c | 8 ++++ drivers/net/ethernet/mellanox/mlxsw/trap.h | 2 + include/linux/mroute.h | 2 + include/linux/skbuff.h | 1 + net/ipv4/ipmr.c | 46 +++++++++++++++++++--- 10 files changed, 95 insertions(+), 14 deletions(-) -- 2.9.5
