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linux/net/ipv4
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Yotam Gigi a5bc9294d7 ipv4: ipmr: Don't forward packets already forwarded by hardware 
Change the ipmr module to not forward packets if:
 - The packet is marked with the offload_mr_fwd_mark, and
 - Both input interface and output interface share the same parent ID.

This way, a packet can go through partial multicast forwarding in the
hardware, where it will be forwarded only to the devices that share the
same parent ID (AKA, reside inside the same hardware). The kernel will
forward the packet to all other interfaces.

To do this, add the ipmr_offload_forward helper, which per skb, ingress VIF
and egress VIF, returns whether the forwarding was offloaded to hardware.
The ipmr_queue_xmit frees the skb and does not forward it if the result is
a true value.

All the forwarding path code compiles out when the CONFIG_NET_SWITCHDEV is
not set.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-03 10:06:30 -07:00
..
netfilter netfilter: xtables: add scheduling opportunity in get_counters 2017-09-08 18:55:27 +02:00
af_inet.c ipv4: Namespaceify tcp_fastopen_key knob 2017-10-01 17:55:54 -07:00
ah4.c
arp.c neigh: increase queue_len_bytes to match wmem_default 2017-08-29 16:10:50 -07:00
cipso_ipv4.c
datagram.c
devinet.c net: avoid a full fib lookup when rp_filter is disabled. 2017-09-21 15:15:22 -07:00
esp4_offload.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
esp4.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
fib_frontend.c net: avoid a full fib lookup when rp_filter is disabled. 2017-09-21 15:15:22 -07:00
fib_lookup.h ipv4: do metrics match when looking up and deleting a route 2017-08-23 20:37:10 -07:00
fib_notifier.c net: Add module reference to FIB notifiers 2017-09-01 20:33:42 -07:00
fib_rules.c
fib_semantics.c net: ipv4: remove fib_info arg to fib_check_nh 2017-09-29 06:19:32 +01:00
fib_trie.c ipv4: do metrics match when looking up and deleting a route 2017-08-23 20:37:10 -07:00
fou.c
gre_demux.c
gre_offload.c
icmp.c
igmp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-21 17:06:42 -07:00
inet_connection_sock.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-23 10:16:53 -07:00
inet_diag.c inet_diag: allow protocols to provide additional data 2017-09-01 18:38:09 -07:00
inet_fragment.c Revert "net: use lib/percpu_counter API for fragmentation mem accounting" 2017-09-03 11:01:05 -07:00
inet_hashtables.c
inet_timewait_sock.c
inetpeer.c inetpeer: speed up inetpeer_invalidate_tree() 2017-09-28 09:40:59 -07:00
ip_forward.c
ip_fragment.c Revert "net: fix percpu memory leaks" 2017-09-03 11:01:05 -07:00
ip_gre.c ipv4: speedup ipv6 tunnels dismantle 2017-09-19 16:32:24 -07:00
ip_input.c
ip_options.c
ip_output.c udp: remove unreachable ufo branches 2017-08-22 14:27:18 -07:00
ip_sockglue.c net: ipv4: fix l3slave check for index returned in IP_PKTINFO 2017-09-15 14:27:51 -07:00
ip_tunnel_core.c
ip_tunnel.c ipv4: speedup ipv6 tunnels dismantle 2017-09-19 16:32:24 -07:00
ip_vti.c ipv4: speedup ipv6 tunnels dismantle 2017-09-19 16:32:24 -07:00
ipcomp.c
ipconfig.c
ipip.c ipv4: speedup ipv6 tunnels dismantle 2017-09-19 16:32:24 -07:00
ipmr.c ipv4: ipmr: Don't forward packets already forwarded by hardware 2017-10-03 10:06:30 -07:00
Kconfig
Makefile
netfilter.c
ping.c
proc.c tcp: Revert "tcp: remove header prediction" 2017-08-30 11:20:09 -07:00
protocol.c
raw_diag.c
raw.c
route.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-21 17:06:42 -07:00
syncookies.c
sysctl_net_ipv4.c ipv4: Namespaceify tcp_fastopen_blackhole_timeout knob 2017-10-01 17:55:54 -07:00
tcp_bbr.c
tcp_bic.c
tcp_cdg.c
tcp_cong.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
tcp_cubic.c
tcp_dctcp.c
tcp_diag.c tcp_diag: report TCP MD5 signing keys and addresses 2017-09-01 18:38:09 -07:00
tcp_fastopen.c ipv4: Namespaceify tcp_fastopen_blackhole_timeout knob 2017-10-01 17:55:54 -07:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c net: sk_buff rbnode reorg 2017-09-19 15:20:22 -07:00
tcp_ipv4.c ipv4: Namespaceify tcp_fastopen_blackhole_timeout knob 2017-10-01 17:55:54 -07:00
tcp_lp.c
tcp_metrics.c tcp: batch tcp_net_metrics_exit 2017-09-19 16:32:23 -07:00
tcp_minisocks.c tcp: Revert "tcp: remove header prediction" 2017-08-30 11:20:09 -07:00
tcp_nv.c
tcp_offload.c
tcp_output.c tcp: fastopen: fix on syn-data transmit failure 2017-09-19 16:16:51 -07:00
tcp_probe.c
tcp_rate.c
tcp_recovery.c
tcp_scalable.c
tcp_timer.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-09 16:28:45 -07:00
tcp_ulp.c tcp: ulp: avoid module refcnt leak in tcp_set_ulp 2017-08-14 22:17:05 -07:00
tcp_vegas.c tcp: fix under-evaluated ssthresh in TCP Vegas 2017-09-29 06:07:00 +01:00
tcp_vegas.h
tcp_veno.c
tcp_westwood.c tcp: Revert "tcp: remove CA_ACK_SLOWPATH" 2017-08-30 11:20:08 -07:00
tcp_yeah.c
tcp.c ipv4: Namespaceify tcp_fastopen_key knob 2017-10-01 17:55:54 -07:00
tunnel4.c
udp_diag.c
udp_impl.h
udp_offload.c net: avoid skb_warn_bad_offload false positives on UFO 2017-08-08 21:39:01 -07:00
udp_tunnel.c
udp.c udp: do rmem bulk free even if the rx sk queue is empty 2017-09-20 14:28:52 -07:00
udplite.c
xfrm4_input.c
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c net: xfrm: support setting an output mark. 2017-08-11 07:03:00 +02:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c