From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: netdev@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, sdf@google.com,
posk@google.com, Willem de Bruijn <willemb@google.com>
Subject: [PATCH bpf-next 12/13] selftests/bpf: convert bpf tunnel test to BPF_F_ADJ_ROOM_FIXED_GSO
Date: Wed, 20 Mar 2019 10:49:43 -0400 [thread overview]
Message-ID: <20190320144944.147862-13-willemdebruijn.kernel@gmail.com> (raw)
In-Reply-To: <20190320144944.147862-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Lower route MTU to ensure packets fit in device MTU after encap, then
skip the gso_size changes.
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
tools/testing/selftests/bpf/progs/test_tc_tunnel.c | 11 ++++++++---
tools/testing/selftests/bpf/test_tc_tunnel.sh | 6 ++++++
2 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/progs/test_tc_tunnel.c b/tools/testing/selftests/bpf/progs/test_tc_tunnel.c
index f6a16fd23dbd5..3b79dffb81037 100644
--- a/tools/testing/selftests/bpf/progs/test_tc_tunnel.c
+++ b/tools/testing/selftests/bpf/progs/test_tc_tunnel.c
@@ -52,6 +52,7 @@ static __always_inline int encap_ipv4(struct __sk_buff *skb, bool with_gre)
struct grev4hdr h_outer;
struct iphdr iph_inner;
struct tcphdr tcph;
+ __u64 flags;
int olen;
if (bpf_skb_load_bytes(skb, ETH_HLEN, &iph_inner,
@@ -69,10 +70,11 @@ static __always_inline int encap_ipv4(struct __sk_buff *skb, bool with_gre)
if (tcph.dest != __bpf_constant_htons(cfg_port))
return TC_ACT_OK;
+ flags = BPF_F_ADJ_ROOM_FIXED_GSO;
olen = with_gre ? sizeof(h_outer) : sizeof(h_outer.ip);
/* add room between mac and network header */
- if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, 0))
+ if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, flags))
return TC_ACT_SHOT;
/* prepare new outer network header */
@@ -102,6 +104,7 @@ static __always_inline int encap_ipv6(struct __sk_buff *skb, bool with_gre)
struct ipv6hdr iph_inner;
struct grev6hdr h_outer;
struct tcphdr tcph;
+ __u64 flags;
int olen;
if (bpf_skb_load_bytes(skb, ETH_HLEN, &iph_inner,
@@ -116,10 +119,11 @@ static __always_inline int encap_ipv6(struct __sk_buff *skb, bool with_gre)
if (tcph.dest != __bpf_constant_htons(cfg_port))
return TC_ACT_OK;
+ flags = BPF_F_ADJ_ROOM_FIXED_GSO;
olen = with_gre ? sizeof(h_outer) : sizeof(h_outer.ip);
/* add room between mac and network header */
- if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, 0))
+ if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, flags))
return TC_ACT_SHOT;
/* prepare new outer network header */
@@ -195,7 +199,8 @@ static int decap_internal(struct __sk_buff *skb, int off, int len, char proto)
return TC_ACT_OK;
}
- if (bpf_skb_adjust_room(skb, -olen, BPF_ADJ_ROOM_MAC, 0))
+ if (bpf_skb_adjust_room(skb, -olen, BPF_ADJ_ROOM_MAC,
+ BPF_F_ADJ_ROOM_FIXED_GSO))
return TC_ACT_SHOT;
return TC_ACT_OK;
diff --git a/tools/testing/selftests/bpf/test_tc_tunnel.sh b/tools/testing/selftests/bpf/test_tc_tunnel.sh
index 5d9d56520c694..3d2111d89315c 100755
--- a/tools/testing/selftests/bpf/test_tc_tunnel.sh
+++ b/tools/testing/selftests/bpf/test_tc_tunnel.sh
@@ -35,6 +35,12 @@ setup() {
ip -netns "${ns1}" -6 addr add "${ns1_v6}/64" dev veth1 nodad
ip -netns "${ns2}" -6 addr add "${ns2_v6}/64" dev veth2 nodad
+ # clamp route to reserve room for tunnel headers
+ ip -netns "${ns1}" -4 route flush table main
+ ip -netns "${ns1}" -6 route flush table main
+ ip -netns "${ns1}" -4 route add "${ns2_v4}" mtu 1476 dev veth1
+ ip -netns "${ns1}" -6 route add "${ns2_v6}" mtu 1456 dev veth1
+
sleep 1
dd if=/dev/urandom of="${infile}" bs="${datalen}" count=1 status=none
--
2.21.0.225.g810b269d1ac-goog
next prev parent reply other threads:[~2019-03-20 14:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-20 14:49 [PATCH bpf-next 00/13] bpf tc tunneling Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 01/13] bpf: in bpf_skb_adjust_room avoid copy in tx fast path Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 02/13] selftests/bpf: bpf tunnel encap test Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 03/13] selftests/bpf: expand bpf tunnel test with decap Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 04/13] selftests/bpf: expand bpf tunnel test to ipv6 Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 05/13] selftests/bpf: extend bpf tunnel test with gre Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 06/13] selftests/bpf: extend bpf tunnel test with tso Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 07/13] bpf: add bpf_skb_adjust_room mode BPF_ADJ_ROOM_MAC Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 08/13] bpf: add bpf_skb_adjust_room flag BPF_F_ADJ_ROOM_FIXED_GSO Willem de Bruijn
2019-03-21 13:42 ` Alan Maguire
2019-03-21 14:00 ` Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 09/13] bpf: add bpf_skb_adjust_room encap flags Willem de Bruijn
2019-03-20 15:51 ` Alan Maguire
2019-03-20 18:10 ` Willem de Bruijn
2019-03-21 3:13 ` Alexei Starovoitov
2019-03-21 13:25 ` Willem de Bruijn
2019-03-20 14:49 ` [PATCH bpf-next 10/13] bpf: Sync bpf.h to tools Willem de Bruijn
2019-03-20 14:56 ` Soheil Hassas Yeganeh
2019-03-20 14:49 ` [PATCH bpf-next 11/13] selftests/bpf: convert bpf tunnel test to BPF_ADJ_ROOM_MAC Willem de Bruijn
2019-03-20 14:49 ` Willem de Bruijn [this message]
2019-03-20 14:49 ` [PATCH bpf-next 13/13] selftests/bpf: convert bpf tunnel test to encap modes Willem de Bruijn
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