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authorTom Herbert <tom@herbertland.com>2015-09-01 09:24:31 -0700
committerDavid S. Miller <davem@davemloft.net>2015-09-01 15:06:23 -0700
commit872b1abb1ed47a691f465fb3d285f6cf6bcd8663 (patch)
tree42d039b2efbd26699c9e2033d54a47d8e831eede /include/net/flow_dissector.h
parent8306b688f1a6621b9efe3b0d827e26750528b12a (diff)
downloadlinux-872b1abb1ed47a691f465fb3d285f6cf6bcd8663.tar.bz2
flow_dissector: Add flag to stop parsing when an IPv6 flow label is seen
Add an input flag to flow dissector on rather dissection should be stopped when a flow label is encountered. Presumably, the flow label is derived from a sufficient hash of an inner transport packet so further dissection is not needed (that is ports are not included in the flow hash). Using the flow label instead of ports has the additional benefit that packet fragments should hash to same value as non-fragments for a flow (assuming that the same flow label is used). We set this flag by default in for skb_get_hash. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/flow_dissector.h')
-rw-r--r--include/net/flow_dissector.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
index bb81e3b576e7..66dbc3498efb 100644
--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -126,6 +126,7 @@ 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)
struct flow_dissector_key {
enum flow_dissector_key_id key_id;