From: Stanislav Fomichev <sdf@google.com>
To: netdev@vger.kernel.org, bpf@vger.kernel.org
Cc: davem@davemloft.net, ast@kernel.org, daniel@iogearbox.net,
simon.horman@netronome.com, willemb@google.com,
peterpenkov96@gmail.com, Stanislav Fomichev <sdf@google.com>
Subject: [PATCH bpf 0/5] flow_dissector: lay groundwork for calling BPF hook from eth_get_headlen
Date: Mon, 1 Apr 2019 13:57:29 -0700 [thread overview]
Message-ID: <20190401205734.4400-1-sdf@google.com> (raw)
This patch series fixes the existing BPF flow dissector API to
support calling BPF progs from the eth_get_headlen context (the support
itself will be added in bpf-next tree).
The summary of the changes:
* fix VLAN handling in bpf_flow.c, we don't need to peek back and look
at skb->vlan_present; add selftests
* pass and use flow_keys->n_proto instead of skb->protocol
* fix clamping of flow_keys->nhoff for packets with nhoff > 0
* prohibit access to most of the __sk_buff fields from BPF flow
dissector progs; only data/data_end/flow_keys are allowed (all input
is now passed via flow_keys)
* finally, document BPF flow dissector program environment
Stanislav Fomichev (5):
selftests/bpf: fix vlan handling in flow dissector program
net/flow_dissector: pass flow_keys->n_proto to BPF programs
flow_dissector: fix clamping of BPF flow_keys for non-zero nhoff
flow_dissector: allow access only to a subset of __sk_buff fields
flow_dissector: document BPF flow dissector environment
.../networking/bpf_flow_dissector.txt | 115 ++++++++++++++++++
net/core/filter.c | 16 +--
net/core/flow_dissector.c | 4 +-
.../selftests/bpf/prog_tests/flow_dissector.c | 68 +++++++++++
tools/testing/selftests/bpf/progs/bpf_flow.c | 19 ++-
5 files changed, 196 insertions(+), 26 deletions(-)
create mode 100644 Documentation/networking/bpf_flow_dissector.txt
--
2.21.0.392.gf8f6787159e-goog
next reply other threads:[~2019-04-01 20:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-01 20:57 Stanislav Fomichev [this message]
2019-04-01 20:57 ` [PATCH bpf 1/5] selftests/bpf: fix vlan handling in flow dissector program Stanislav Fomichev
2019-04-01 20:57 ` [PATCH bpf 2/5] net/flow_dissector: pass flow_keys->n_proto to BPF programs Stanislav Fomichev
2019-04-01 20:57 ` [PATCH bpf 3/5] flow_dissector: fix clamping of BPF flow_keys for non-zero nhoff Stanislav Fomichev
2019-04-01 20:57 ` [PATCH bpf 4/5] flow_dissector: allow access only to a subset of __sk_buff fields Stanislav Fomichev
2019-04-01 20:57 ` [PATCH bpf 5/5] flow_dissector: document BPF flow dissector environment Stanislav Fomichev
2019-04-02 20:54 ` Petar Penkov
2019-04-02 21:00 ` Stanislav Fomichev
2019-04-03 18:34 ` Jesper Dangaard Brouer
2019-04-03 18:50 ` Stanislav Fomichev
2019-04-02 20:17 ` [PATCH bpf 0/5] flow_dissector: lay groundwork for calling BPF hook from eth_get_headlen Willem de Bruijn
2019-04-02 20:52 ` Petar Penkov
2019-04-03 14:54 ` Daniel Borkmann
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