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| author |   Stanislav Fomichev <sdf@google.com> | 2019-07-25 15:52:30 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-07-25 18:00:41 -0700 |
| commit | 71c99e32b926159ea628352751f66383d7d04d17 (patch) | |
| tree | 6a2b488c1d184b9ce514deb7187ab9b0130a270c /net/core/flow_dissector.c | |
| parent | selftests/bpf: support BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG (diff) | |
| download | linux-dev-71c99e32b926159ea628352751f66383d7d04d17.tar.xz linux-dev-71c99e32b926159ea628352751f66383d7d04d17.zip | |
bpf/flow_dissector: support ipv6 flow_label and BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL
Add support for exporting ipv6 flow label via bpf_flow_keys.
Export flow label from bpf_flow.c and also return early when
BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL is passed.
Acked-by: Petar Penkov <ppenkov@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Petar Penkov <ppenkov@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/core/flow_dissector.c')
| -rw-r--r-- | net/core/flow_dissector.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 50ed1a688709..9741b593ea53 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -737,6 +737,7 @@ static void __skb_flow_bpf_to_target(const struct bpf_flow_keys *flow_keys, struct flow_dissector_key_basic *key_basic; struct flow_dissector_key_addrs *key_addrs; struct flow_dissector_key_ports *key_ports; + struct flow_dissector_key_tags *key_tags; key_control = skb_flow_dissector_target(flow_dissector, FLOW_DISSECTOR_KEY_CONTROL, @@ -781,6 +782,14 @@ static void __skb_flow_bpf_to_target(const struct bpf_flow_keys *flow_keys, key_ports->src = flow_keys->sport; key_ports->dst = flow_keys->dport; } + + if (dissector_uses_key(flow_dissector, + FLOW_DISSECTOR_KEY_FLOW_LABEL)) { + key_tags = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_FLOW_LABEL, + target_container); + key_tags->flow_label = ntohl(flow_keys->flow_label); + } } bool bpf_flow_dissect(struct bpf_prog *prog, struct bpf_flow_dissector *ctx, |