From: Lorenzo Bianconi <lorenzo@kernel.org>
To: bpf@vger.kernel.org
Cc: pablo@netfilter.org, kadlec@netfilter.org, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
netfilter-devel@vger.kernel.org, netdev@vger.kernel.org,
ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
lorenzo.bianconi@redhat.com, toke@redhat.com, fw@strlen.de,
hawk@kernel.org, horms@kernel.org, donhunte@redhat.com
Subject: [RFC bpf-next v1 0/4] netfilter: Add the capability to offload flowtable in XDP layer
Date: Fri, 10 May 2024 16:01:23 +0200 [thread overview]
Message-ID: <cover.1715348200.git.lorenzo@kernel.org> (raw)
Introduce bpf_xdp_flow_offload_lookup kfunc in order to perform the
lookup of a given flowtable entry based on the fib tuple of incoming
traffic.
bpf_xdp_flow_offload_lookup can be used as building block to offload
in XDP the sw flowtable processing when the hw support is not available.
This series has been tested running the xdp_flowtable_offload eBPF program
on an ixgbe 10Gbps NIC (eno2) in order to XDP_REDIRECT the TCP traffic to
a veth pair (veth0-veth1) based on the content of the nf_flowtable as soon
as the TCP connection is in the established state:
[tcp client] (eno1) == LAN == (eno2) xdp_flowtable_offload [XDP_REDIRECT] --> veth0 == veth1 [tcp server]
table inet filter {
flowtable ft {
hook ingress priority filter
devices = { eno2, veth0 }
}
chain forward {
type filter hook forward priority filter
meta l4proto { tcp, udp } flow add @ft
}
}
- sw flowtable [1 TCP stream, T = 300s]: ~ 6.2 Gbps
- xdp flowtable [1 TCP stream, T = 300s]: ~ 7.6 Gbps
Florian Westphal (1):
netfilter: nf_tables: add flowtable map for xdp offload
Lorenzo Bianconi (3):
netfilter: add bpf_xdp_flow_offload_lookup kfunc
samples/bpf: Add bpf sample to offload flowtable traffic to xdp
selftests/bpf: Add selftest for bpf_xdp_flow_offload_lookup kfunc
include/net/netfilter/nf_flow_table.h | 11 +
net/netfilter/Makefile | 5 +
net/netfilter/nf_flow_table_bpf.c | 95 +++
net/netfilter/nf_flow_table_inet.c | 2 +
net/netfilter/nf_flow_table_offload.c | 161 ++++-
samples/bpf/Makefile | 7 +-
samples/bpf/xdp_flowtable_offload.bpf.c | 592 ++++++++++++++++++
samples/bpf/xdp_flowtable_offload_user.c | 128 ++++
tools/testing/selftests/bpf/Makefile | 10 +-
tools/testing/selftests/bpf/config | 4 +
.../selftests/bpf/progs/xdp_flowtable.c | 142 +++++
.../selftests/bpf/test_xdp_flowtable.sh | 112 ++++
tools/testing/selftests/bpf/xdp_flowtable.c | 142 +++++
13 files changed, 1406 insertions(+), 5 deletions(-)
create mode 100644 net/netfilter/nf_flow_table_bpf.c
create mode 100644 samples/bpf/xdp_flowtable_offload.bpf.c
create mode 100644 samples/bpf/xdp_flowtable_offload_user.c
create mode 100644 tools/testing/selftests/bpf/progs/xdp_flowtable.c
create mode 100755 tools/testing/selftests/bpf/test_xdp_flowtable.sh
create mode 100644 tools/testing/selftests/bpf/xdp_flowtable.c
--
2.45.0
next reply other threads:[~2024-05-10 14:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 14:01 Lorenzo Bianconi [this message]
2024-05-10 14:01 ` [RFC bpf-next v1 1/4] netfilter: nf_tables: add flowtable map for xdp offload Lorenzo Bianconi
2024-05-10 14:01 ` [RFC bpf-next v1 2/4] netfilter: add bpf_xdp_flow_offload_lookup kfunc Lorenzo Bianconi
2024-05-10 14:01 ` [RFC bpf-next v1 3/4] samples/bpf: Add bpf sample to offload flowtable traffic to xdp Lorenzo Bianconi
2024-05-10 14:01 ` [RFC bpf-next v1 4/4] selftests/bpf: Add selftest for bpf_xdp_flow_offload_lookup kfunc Lorenzo Bianconi
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