Commit ace15f91 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by Martin KaFai Lau
Browse files

selftests/bpf: Add selftests for netkit 



Add a bigger batch of test coverage to assert correct operation of
netkit devices and their BPF program management:

  # ./test_progs -t tc_netkit
  [...]
  [    1.166267] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.166831] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  [    1.270957] tsc: Refined TSC clocksource calibration: 3407.988 MHz
  [    1.272579] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fc932722, max_idle_ns: 440795381586 ns
  [    1.275336] clocksource: Switched to clocksource tsc
  #257     tc_netkit_basic:OK
  #258     tc_netkit_device:OK
  #259     tc_netkit_multi_links:OK
  #260     tc_netkit_multi_opts:OK
  #261     tc_netkit_neigh_links:OK
  Summary: 5/0 PASSED, 0 SKIPPED, 0 FAILED
  [...]

Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20231024214904.29825-8-daniel@iogearbox.net


Signed-off-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
parent 51f1892b

tools/testing/selftests/bpf/config

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ CONFIG_NETFILTER_SYNPROXY=y 
CONFIG_NETFILTER_XT_CONNMARK=y

CONFIG_NETFILTER_XT_MATCH_STATE=y

CONFIG_NETFILTER_XT_TARGET_CT=y

CONFIG_NETKIT=y

CONFIG_NF_CONNTRACK=y

CONFIG_NF_CONNTRACK_MARK=y

CONFIG_NF_DEFRAG_IPV4=y

tools/testing/selftests/bpf/prog_tests/tc_helpers.h

+4 −0
Original line number Diff line number Diff line
@@ -4,6 +4,10 @@ 
#define TC_HELPERS

#include <test_progs.h>



#ifndef loopback

# define loopback 1

#endif



static inline __u32 id_from_prog_fd(int fd)

{

	struct bpf_prog_info prog_info = {};

tools/testing/selftests/bpf/prog_tests/tc_netkit.c

0 → 100644
+687 −0

File added.

Preview size limit exceeded, changes collapsed.

tools/testing/selftests/bpf/progs/test_tc_link.c

+13 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2023 Isovalent */

#include <stdbool.h>



#include <linux/bpf.h>

#include <linux/if_ether.h>



#include <bpf/bpf_endian.h>

#include <bpf/bpf_helpers.h>



char LICENSE[] SEC("license") = "GPL";
@@ -12,10 +16,19 @@ bool seen_tc3; 
bool seen_tc4;

bool seen_tc5;

bool seen_tc6;

bool seen_eth;



SEC("tc/ingress")

int tc1(struct __sk_buff *skb)

{

	struct ethhdr eth = {};



	if (skb->protocol != __bpf_constant_htons(ETH_P_IP))

		goto out;

	if (bpf_skb_load_bytes(skb, 0, &eth, sizeof(eth)))

		goto out;

	seen_eth = eth.h_proto == bpf_htons(ETH_P_IP);

out:

	seen_tc1 = true;

	return TCX_NEXT;

}