netdev - [PATCH net-next 08/14] netfilter: flowtable: Add FLOW_OFFLOAD_XMIT

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Date:   Sun, 18 Apr 2021 23:04:09 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     netfilter-devel@...r.kernel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org
Subject: [PATCH net-next 08/14] netfilter: flowtable: Add FLOW_OFFLOAD_XMIT_UNSPEC xmit type

From: Roi Dayan <roid@...dia.com>

It could be xmit type was not set and would default to FLOW_OFFLOAD_XMIT_NEIGH
and in this type the gc expect to have a route info.
Fix that by adding FLOW_OFFLOAD_XMIT_UNSPEC which defaults to 0.

Fixes: 8b9229d15877 ("netfilter: flowtable: dst_check() from garbage collector path")
Signed-off-by: Roi Dayan <roid@...dia.com>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
 include/net/netfilter/nf_flow_table.h | 3 ++-
 net/netfilter/nf_flow_table_core.c    | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
index d46e422c9d10..51d8eb99764d 100644
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -92,7 +92,8 @@ enum flow_offload_tuple_dir {
 #define FLOW_OFFLOAD_DIR_MAX	IP_CT_DIR_MAX
 
 enum flow_offload_xmit_type {
-	FLOW_OFFLOAD_XMIT_NEIGH		= 0,
+	FLOW_OFFLOAD_XMIT_UNSPEC	= 0,
+	FLOW_OFFLOAD_XMIT_NEIGH,
 	FLOW_OFFLOAD_XMIT_XFRM,
 	FLOW_OFFLOAD_XMIT_DIRECT,
 };
diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 76573bae6664..39c02d1aeedf 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -130,6 +130,9 @@ static int flow_offload_fill_route(struct flow_offload *flow,
 		flow_tuple->dst_cache = dst;
 		flow_tuple->dst_cookie = flow_offload_dst_cookie(flow_tuple);
 		break;
+	default:
+		WARN_ON_ONCE(1);
+		break;
 	}
 	flow_tuple->xmit_type = route->tuple[dir].xmit_type;
 
-- 
2.30.2