flow_dissector: Add control/reporting of encapsulation

Add an input flag to flow dissector on rather dissection should stop
when encapsulation is detected (IP/IP or GRE). Also, add a key_control
flag that indicates encapsulation was encountered during the
dissection.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
index 66dbc3498efb..bddd1089dbce 100644
--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -14,6 +14,7 @@ struct flow_dissector_key_control {
         u16     addr_type;
         u32     is_fragment:1;
         u32     first_frag:1;
+        u32     encapsulation:1;
 };
 
 /**
@@ -127,6 +128,7 @@ enum flow_dissector_key_id {
 #define FLOW_DISSECTOR_F_PARSE_1ST_FRAG         BIT(0)
 #define FLOW_DISSECTOR_F_STOP_AT_L3             BIT(1)
 #define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL     BIT(2)
+#define FLOW_DISSECTOR_F_STOP_AT_ENCAP          BIT(3)
 
 struct flow_dissector_key {
         enum flow_dissector_key_id key_id;