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| author | Stanislav Fomichev <sdf@google.com> | 2019-04-22 18:55:44 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-04-23 19:36:33 +0300 |
| commit | 089b19a9204fc090793d389a265f54124eacb05d (patch) | |
| tree | 66e9a7497cc7c7444866bda214ea14bd6b66f1ae /include/net/flow_dissector.h | |
| parent | 7e6e185c74dd8a8dc539300c079adc6bc27045d6 (diff) | |
| download | linux-089b19a9204fc090793d389a265f54124eacb05d.tar.xz | |
flow_dissector: switch kernel context to struct bpf_flow_dissector
struct bpf_flow_dissector has a small subset of sk_buff fields that
flow dissector BPF program is allowed to access and an optional
pointer to real skb. Real skb is used only in bpf_skb_load_bytes
helper to read non-linear data.
The real motivation for this is to be able to call flow dissector
from eth_get_headlen context where we don't have an skb and need
to dissect raw bytes.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include/net/flow_dissector.h')
| -rw-r--r-- | include/net/flow_dissector.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index 2b26979efb48..7c5a8d9a8d2a 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -305,4 +305,11 @@ static inline void *skb_flow_dissector_target(struct flow_dissector *flow_dissec return ((char *)target_container) + flow_dissector->offset[key_id]; } +struct bpf_flow_dissector { + struct bpf_flow_keys *flow_keys; + const struct sk_buff *skb; + void *data; + void *data_end; +}; + #endif |