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Date: Thu, 9 Jun 2022 23:37:38 +0200
From: Daniel Borkmann <daniel@...earbox.net>
To: Eyal Birger <eyal.birger@...il.com>, shuah@...nel.org,
ast@...nel.org, andrii@...nel.org, kafai@...com,
songliubraving@...com, yhs@...com, john.fastabend@...il.com,
kpsingh@...nel.org, posk@...gle.com
Cc: linux-kselftest@...r.kernel.org, netdev@...r.kernel.org,
bpf@...r.kernel.org
Subject: Re: [PATCH bpf-next] selftests/bpf: add lwt ip encap tests to
test_progs
Hi Eyal,
On 6/7/22 3:31 PM, Eyal Birger wrote:
> Port test_lwt_ip_encap.sh tests onto test_progs.
>
> In addition, this commit adds "egress_md" tests which test a similar
> flow as egress tests only they use gre devices in collect_md mode
> for encapsulation and set the tunnel key using bpf_set_tunnel_key().
>
> This introduces minor changes to test_lwt_ip_encap.{sh,c} for consistency
> with the new tests:
>
> - GRE key must exist as bpf_set_tunnel_key() explicitly sets the
> TUNNEL_KEY flag
>
> - Source address for GRE traffic is set to IP*_5 instead of IP*_1 since
> GRE traffic is sent via veth5 so its address is selected when using
> bpf_set_tunnel_key()
>
> Note: currently these programs use the legacy section name convention
> as iproute2 lwt configuration does not support providing function names.
>
> Signed-off-by: Eyal Birger <eyal.birger@...il.com>
> ---
> .../selftests/bpf/prog_tests/lwt_ip_encap.c | 582 ++++++++++++++++++
> .../selftests/bpf/progs/test_lwt_ip_encap.c | 51 +-
> .../selftests/bpf/test_lwt_ip_encap.sh | 6 +-
> 3 files changed, 633 insertions(+), 6 deletions(-)
> create mode 100644 tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c b/tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c
> new file mode 100644
> index 000000000000..e1b6f3ce6045
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c
> @@ -0,0 +1,582 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +
> +/* Setup/topology:
> + *
> + * NS1 NS2 NS3
> + * veth1 <---> veth2 veth3 <---> veth4 (the top route)
> + * veth5 <---> veth6 veth7 <---> veth8 (the bottom route)
> + *
> + * each vethN gets IP[4|6]_N address
> + *
> + * IP*_SRC = IP*_1
> + * IP*_DST = IP*_4
> + *
> + * all tests test pings from IP*_SRC to IP*_DST
> + *
> + * by default, routes are configured to allow packets to go
> + * IP*_1 <=> IP*_2 <=> IP*_3 <=> IP*_4 (the top route)
> + *
> + * a GRE device is installed in NS3 with IP*_GRE, and
> + * NS1/NS2 are configured to route packets to IP*_GRE via IP*_8
> + * (the bottom route)
> + *
> + * Tests:
> + *
> + * 1. routes NS2->IP*_DST are brought down, so the only way a ping
> + * from IP*_SRC to IP*_DST can work is via IP*_GRE
> + *
> + * 2a. in an egress test, a bpf LWT_XMIT program is installed on veth1
> + * that encaps the packets with an IP/GRE header to route to IP*_GRE
> + *
> + * ping: SRC->[encap at veth1:egress]->GRE:decap->DST
> + * ping replies go DST->SRC directly
> + *
> + * 2b. in an ingress test, a bpf LWT_IN program is installed on veth2
> + * that encaps the packets with an IP/GRE header to route to IP*_GRE
> + *
> + * ping: SRC->[encap at veth2:ingress]->GRE:decap->DST
> + * ping replies go DST->SRC directly
> + *
> + * 2c. in an egress_md test, a bpf LWT_XMIT program is installed on a
> + * route towards collect_md gre{,6} devices in NS1 and sets the tunnel
> + * key such that packets are encapsulated with an IP/GRE header to route
> + * to IP*_GRE
> + *
> + * ping: SRC->[encap at gre{,6}_md:xmit]->GRE:decap->DST
> + * ping replies go DST->SRC directly
> + */
> +
[...]
Thanks a lot for porting the test into test_progs! Looks like the BPF CI currently
bails out here:
https://github.com/kernel-patches/bpf/runs/6812283921?check_suite_focus=true
Andrii, looks like we might be missing CONFIG_NET_VRF in vmtest config-latest.*?
[...]
#98/1 lwt_ip_encap/lwt_ipv4_encap_egress:OK
#98/2 lwt_ip_encap/lwt_ipv6_encap_egress:OK
setup_namespaces:PASS:ip netns add ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_3 0 nsec
lwt_ip_encap_test:PASS:setup namespaces 0 nsec
setup_links_and_routes:PASS:ip link add veth1 netns ns_lwt_1 type veth peer name veth2 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth3 netns ns_lwt_2 type veth peer name veth4 netns ns_lwt_3 0 nsec
setup_links_and_routes:PASS:ip link add veth5 netns ns_lwt_1 type veth peer name veth6 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth7 netns ns_lwt_2 type veth peer name veth8 netns ns_lwt_3 0 nsec
open_netns:PASS:malloc token 0 nsec
open_netns:PASS:open /proc/self/ns/net 0 nsec
open_netns:PASS:open netns fd 0 nsec
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
open_netns:PASS:setns_by_fd 0 nsec
setup_ns:PASS:setns 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
setup_vrf:FAIL:ip link add red type vrf table 1001 unexpected error: 512 (errno 0)
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
close_netns:PASS:setns_by_fd 0 nsec
lwt_ip_encap_test:FAIL:setup links and routes unexpected error: -1 (errno 0)
setup_namespaces:PASS:ip netns delete ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_3 0 nsec
#98/3 lwt_ip_encap/lwt_ipv4_encap_egress_vrf:FAIL
setup_namespaces:PASS:ip netns add ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_3 0 nsec
lwt_ip_encap_test:PASS:setup namespaces 0 nsec
setup_links_and_routes:PASS:ip link add veth1 netns ns_lwt_1 type veth peer name veth2 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth3 netns ns_lwt_2 type veth peer name veth4 netns ns_lwt_3 0 nsec
setup_links_and_routes:PASS:ip link add veth5 netns ns_lwt_1 type veth peer name veth6 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth7 netns ns_lwt_2 type veth peer name veth8 netns ns_lwt_3 0 nsec
open_netns:PASS:malloc token 0 nsec
open_netns:PASS:open /proc/self/ns/net 0 nsec
open_netns:PASS:open netns fd 0 nsec
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
open_netns:PASS:setns_by_fd 0 nsec
setup_ns:PASS:setns 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
setup_vrf:FAIL:ip link add red type vrf table 1001 unexpected error: 512 (errno 0)
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
close_netns:PASS:setns_by_fd 0 nsec
lwt_ip_encap_test:FAIL:setup links and routes unexpected error: -1 (errno 0)
setup_namespaces:PASS:ip netns delete ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_3 0 nsec
#98/4 lwt_ip_encap/lwt_ipv6_encap_egress_vrf:FAIL
#98/5 lwt_ip_encap/lwt_ipv4_encap_ingress:OK
#98/6 lwt_ip_encap/lwt_ipv6_encap_ingress:OK
setup_namespaces:PASS:ip netns add ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_3 0 nsec
lwt_ip_encap_test:PASS:setup namespaces 0 nsec
setup_links_and_routes:PASS:ip link add veth1 netns ns_lwt_1 type veth peer name veth2 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth3 netns ns_lwt_2 type veth peer name veth4 netns ns_lwt_3 0 nsec
setup_links_and_routes:PASS:ip link add veth5 netns ns_lwt_1 type veth peer name veth6 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth7 netns ns_lwt_2 type veth peer name veth8 netns ns_lwt_3 0 nsec
open_netns:PASS:malloc token 0 nsec
open_netns:PASS:open /proc/self/ns/net 0 nsec
open_netns:PASS:open netns fd 0 nsec
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
open_netns:PASS:setns_by_fd 0 nsec
setup_ns:PASS:setns 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
setup_vrf:FAIL:ip link add red type vrf table 1001 unexpected error: 512 (errno 0)
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
close_netns:PASS:setns_by_fd 0 nsec
lwt_ip_encap_test:FAIL:setup links and routes unexpected error: -1 (errno 0)
setup_namespaces:PASS:ip netns delete ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_3 0 nsec
#98/7 lwt_ip_encap/lwt_ipv4_encap_ingress_vrf:FAIL
setup_namespaces:PASS:ip netns add ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns add ns_lwt_3 0 nsec
lwt_ip_encap_test:PASS:setup namespaces 0 nsec
setup_links_and_routes:PASS:ip link add veth1 netns ns_lwt_1 type veth peer name veth2 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth3 netns ns_lwt_2 type veth peer name veth4 netns ns_lwt_3 0 nsec
setup_links_and_routes:PASS:ip link add veth5 netns ns_lwt_1 type veth peer name veth6 netns ns_lwt_2 0 nsec
setup_links_and_routes:PASS:ip link add veth7 netns ns_lwt_2 type veth peer name veth8 netns ns_lwt_3 0 nsec
open_netns:PASS:malloc token 0 nsec
open_netns:PASS:open /proc/self/ns/net 0 nsec
open_netns:PASS:open netns fd 0 nsec
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
open_netns:PASS:setns_by_fd 0 nsec
setup_ns:PASS:setns 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
write_sysctl:PASS:open sysctl 0 nsec
write_sysctl:PASS:write sysctl 0 nsec
setup_vrf:FAIL:ip link add red type vrf table 1001 unexpected error: 512 (errno 0)
setns_by_fd:PASS:setns 0 nsec
setns_by_fd:PASS:unshare 0 nsec
setns_by_fd:PASS:remount private /sys 0 nsec
setns_by_fd:PASS:umount2 /sys 0 nsec
setns_by_fd:PASS:mount /sys 0 nsec
setns_by_fd:PASS:mount /sys/fs/bpf 0 nsec
close_netns:PASS:setns_by_fd 0 nsec
lwt_ip_encap_test:FAIL:setup links and routes unexpected error: -1 (errno 0)
setup_namespaces:PASS:ip netns delete ns_lwt_1 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_2 0 nsec
setup_namespaces:PASS:ip netns delete ns_lwt_3 0 nsec
#98/8 lwt_ip_encap/lwt_ipv6_encap_ingress_vrf:FAIL
#98/9 lwt_ip_encap/lwt_ipv4_encap_egress_md:OK
#98/10 lwt_ip_encap/lwt_ipv6_encap_egress_md:OK
#98 lwt_ip_encap:FAIL
#99/1 map_init/pcpu_map_init:OK
#99/2 map_init/pcpu_lru_map_init:OK
#99 map_init:OK
[...]
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