Currently when fragmented packets are to be transmitted in to tunnel,
base_flow->nw_frag which was initially non-zero at reception is not
reset to zero when the base_flow and flow are rewritten
as part of the emulated tnl_push action in the ofproto-dpif-xlate
module.
Because of this when fragmented packets are transmitted out of tunnel,
we hit crash caused by the following assert.
lib/odp-util.c:5654: assertion flow->nw_proto == base_flow->nw_proto &&
flow->nw_frag == base_flow->nw_frag failed in commit_set_ipv4_action()
With the following change propagate_tunnel_data_to_flow__
is modified to reset *nw_frag* to zero. Also, that currently we don't
fragment tunnelled packets, we should reset *nw_frag* to zero in
propagate_tunnel_data_to_flow__.
Signed-off-by: Jan Scheurich <jan.scheur...@ericsson.com>
From: Rohith Basavaraja <rohith.basavar...@ericsson.com>
CC: Jan Scheurich <jan.scheur...@ericsson.com>
---
ofproto/ofproto-dpif-xlate.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
index 94e3ddb..e9ed037 100644
--- a/ofproto/ofproto-dpif-xlate.c
+++ b/ofproto/ofproto-dpif-xlate.c
@@ -3310,6 +3310,7 @@ propagate_tunnel_data_to_flow__(struct flow *dst_flow,
dst_flow->ipv6_dst = src_flow->tunnel.ipv6_dst;
dst_flow->ipv6_src = src_flow->tunnel.ipv6_src;
+ dst_flow->nw_frag = 0; /* Tunnel packets are unfragmented. */
dst_flow->nw_tos = src_flow->tunnel.ip_tos;
dst_flow->nw_ttl = src_flow->tunnel.ip_ttl;
dst_flow->tp_dst = src_flow->tunnel.tp_dst;
--
1.9.1
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