diff options
| author | Stanislav Fomichev <sdf@google.com> | 2019-04-22 08:55:44 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-04-23 18:36:33 +0200 |
| commit | 089b19a9204fc090793d389a265f54124eacb05d (patch) | |
| tree | 66e9a7497cc7c7444866bda214ea14bd6b66f1ae /include/linux/skbuff.h | |
| parent | 7e6e185c74dd8a8dc539300c079adc6bc27045d6 (diff) | |
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/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 6f42942a443b..2b7b8228c5c3 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1275,6 +1275,10 @@ static inline int skb_flow_dissector_bpf_prog_detach(const union bpf_attr *attr) } #endif +struct bpf_flow_dissector; +bool bpf_flow_dissect(struct bpf_prog *prog, struct bpf_flow_dissector *ctx, + __be16 proto, int nhoff, int hlen); + struct bpf_flow_keys; bool __skb_flow_bpf_dissect(struct bpf_prog *prog, const struct sk_buff *skb, |