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linux/net/openvswitch
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Aaron Conole e069ba07e6 net: openvswitch: add support for l4 symmetric hashing 
Since its introduction, the ovs module execute_hash action allowed
hash algorithms other than the skb->l4_hash to be used.  However,
additional hash algorithms were not implemented.  This means flows
requiring different hash distributions weren't able to use the
kernel datapath.

Now, introduce support for symmetric hashing algorithm as an
alternative hash supported by the ovs module using the flow
dissector.

Output of flow using l4_sym hash:

    recirc_id(0),in_port(3),eth(),eth_type(0x0800),
    ipv4(dst=64.0.0.0/192.0.0.0,proto=6,frag=no), packets:30473425,
    bytes:45902883702, used:0.000s, flags:SP.,
    actions:hash(sym_l4(0)),recirc(0xd)

Some performance testing with no GRO/GSO, two veths, single flow:

    hash(l4(0)):      4.35 GBits/s
    hash(l4_sym(0)):  4.24 GBits/s

Signed-off-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-06-12 09:46:30 +01:00
..
actions.c net: openvswitch: add support for l4 symmetric hashing 2023-06-12 09:46:30 +01:00
conntrack.c net: extract nf_ct_handle_fragments to nf_conntrack_ovs 2023-02-10 16:23:03 -08:00
conntrack.h net/sched: act_api: fix miss set post_ct for ovs after do conntrack in act_ct 2021-03-16 15:22:18 -07:00
datapath.c net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
datapath.h net/sched: Enable tc skb ext allocation on chain miss only when needed 2022-02-05 10:12:53 +00:00
dp_notify.c net: openvswitch: use netif_ovs_is_port() instead of opencode 2019-07-08 15:53:25 -07:00
flow_netlink.c net: openvswitch: add support for l4 symmetric hashing 2023-06-12 09:46:30 +01:00
flow_netlink.h
flow_table.c There is no particular theme here - mainly quick hits all over the tree. 2023-02-23 17:55:40 -08:00
flow_table.h net: openvswitch: fix to make sure flow_lookup() is not preempted 2020-10-18 12:29:36 -07:00
flow.c net/sched: cls_api: Support hardware miss to tc action 2023-02-20 16:46:10 -08:00
flow.h net: openvswitch: reduce cpu_used_mask memory 2023-02-06 22:36:29 -08:00
Kconfig net: create nf_conntrack_ovs for ovs and tc use 2023-02-10 16:23:03 -08:00
Makefile openvswitch: add trace points 2021-06-22 10:47:32 -07:00
meter.c net: openvswitch: Use struct_size() 2023-05-17 21:25:46 -07:00
meter.h net: openvswitch: use u64 for meter bucket 2020-04-23 18:26:11 -07:00
openvswitch_trace.c openvswitch: add trace points 2021-06-22 10:47:32 -07:00
openvswitch_trace.h openvswitch: add trace points 2021-06-22 10:47:32 -07:00
vport-geneve.c rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link 2022-10-31 18:10:21 -07:00
vport-gre.c rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link 2022-10-31 18:10:21 -07:00
vport-internal_dev.c openvswitch: Change the return type for vport_ops.send function hook to int 2022-09-19 18:28:50 -07:00
vport-internal_dev.h
vport-netdev.c rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link 2022-10-31 18:10:21 -07:00
vport-netdev.h
vport-vxlan.c rtnetlink: Honour NLM_F_ECHO flag in rtnl_delete_link 2022-10-31 18:10:21 -07:00
vport.c net: openvswitch: fix upcall counter access before allocation 2023-06-07 12:25:05 +01:00
vport.h net: openvswitch: Add support to count upcall packets 2022-12-09 10:43:46 +00:00