bpf/flow_dissector: pass input flags to BPF flow dissector program

C flow dissector supports input flags that tell it to customize parsing by either stopping early or trying to parse as deep as possible. Pass those flags to the BPF flow dissector so it can make the same decisions. In the next commits I'll add support for those flags to our reference bpf_flow.c v3: * Export copy of flow dissector flags instead of moving (Alexei Starovoitov)

Stanislav Fomichev committed 7 years ago

Commit 086f9561 parent 03cd1d14 files · +17 −4Browse files

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include/uapi/linux/bpf.h+5−0

@@ -3507,6 +3507,10 @@ enum bpf_task_fd_type { · 3506 unmodified lines
3507	3507	BPF_FD_TYPE_URETPROBE, /* filename + offset */
3508	3508	};
3509	3509
	3510	+#define BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG (1U << 0)
	3511	+#define BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL (1U << 1)
	3512	+#define BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP (1U << 2)
	3513	+
3510	3514	struct bpf_flow_keys {
3511	3515	__u16 nhoff;
3512	3516	__u16 thoff;
@@ -3528,6 +3532,7 @@ struct bpf_flow_keys { · 15 unmodified lines
3528	3532	__u32 ipv6_dst[4]; /* in6_addr; network order */
3529	3533	};
3530	3534	};
	3535	+ __u32 flags;
3531	3536	};
3532	3537
3533	3538	struct bpf_func_info {