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userspace: add erspan tunnel support.

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ERSPAN is a tunneling protocol based on GRE tunnel.  The patch
add erspan tunnel support for ovs-vswitchd with userspace datapath.
Configuring erspan tunnel is similar to gre tunnel, but with
additional erspan's parameters.  Matching a flow on erspan's
metadata is also supported, see ovs-fields for more details.

Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
This commit is contained in:
William Tu
2018-05-15 16:10:48 -04:00
committed by Ben Pfaff
parent 0ffff49753
commit 7dc18ae96d
30 changed files with 1183 additions and 27 deletions
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lib/flow.h
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@@ -959,7 +959,7 @@ static inline void
pkt_metadata_from_flow(struct pkt_metadata *md, const struct flow *flow)
{
/* Update this function whenever struct flow changes. */
BUILD_ASSERT_DECL(FLOW_WC_SEQ == 40);
BUILD_ASSERT_DECL(FLOW_WC_SEQ == 41);
md->recirc_id = flow->recirc_id;
md->dp_hash = flow->dp_hash;