linux.git/tools/testing/selftests/bpf/config, branch v6.7

selftests/bpf: Add selftests for netkit

2023-10-24T23:07:43+00:00

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: Daniel Borkmann 
Acked-by: Martin KaFai Lau 
Link: https://lore.kernel.org/r/20231024214904.29825-8-daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau

selftests/bpf: Enable CONFIG_VSOCKETS in config

2023-10-06T04:41:07+00:00

CONFIG_VSOCKETS is required by BPF selftests, otherwise we get errors
like this:

    ./test_progs:socket_loopback_reuseport:386: socket:
		Address family not supported by protocol
    socket_loopback_reuseport:FAIL:386
    ./test_progs:vsock_unix_redir_connectible:1496:
		vsock_socketpair_connectible() failed
    vsock_unix_redir_connectible:FAIL:1496

So this patch enables it in tools/testing/selftests/bpf/config.

Signed-off-by: Geliang Tang 
Link: https://lore.kernel.org/r/472e73d285db2ea59aca9bbb95eb5d4048327588.1696490003.git.geliang.tang@suse.com
Signed-off-by: Martin KaFai Lau

selftests/bpf: ensure all CI arches set CONFIG_BPF_KPROBE_OVERRIDE=y

2023-09-12T14:59:22+00:00

Turns out CONFIG_BPF_KPROBE_OVERRIDE=y is only enabled in x86-64 CI, but
is not set on aarch64, causing CI failures ([0]).

Move CONFIG_BPF_KPROBE_OVERRIDE=y to arch-agnostic CI config.

  [0] https://github.com/kernel-patches/bpf/actions/runs/6122324047/job/16618390535

Fixes: 7182e56411b9 ("selftests/bpf: Add kprobe_multi override test")
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/r/20230912055928.1704269-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov

selftests/bpf: Add lwt_xmit tests for BPF_REROUTE

2023-08-18T14:05:27+00:00

There is no lwt test case for BPF_REROUTE yet. Add test cases for both
normal and abnormal situations. The abnormal situation is set up with an
fq qdisc on the reroute target device. Without proper fixes, overflow
this qdisc queue limit (to trigger a drop) would panic the kernel.

Signed-off-by: Yan Zhai 
Signed-off-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/62c8ddc1e924269dcf80d2e8af1a1e632cee0b3a.1692326837.git.yan@cloudflare.com

selftests/bpf: Add lwt_xmit tests for BPF_REDIRECT

2023-08-18T14:05:26+00:00

There is no lwt_xmit test case for BPF_REDIRECT yet. Add test cases for
both normal and abnormal situations. For abnormal test cases, devices
are set down or have its carrier set down. Without proper fixes,
BPF_REDIRECT to either ingress or egress of such device would panic the
kernel.

Signed-off-by: Yan Zhai 
Signed-off-by: Daniel Borkmann 
Link: https://lore.kernel.org/bpf/96bf435243641939d9c9da329fab29cb45f7df22.1692326837.git.yan@cloudflare.com

selftests/bpf: Add missing selftests kconfig options

2023-06-05T23:30:07+00:00

Our selftests of course rely on the kernel being built with
CONFIG_DEBUG_INFO_BTF=y, though this (nor its dependencies of
CONFIG_DEBUG_INFO=y and CONFIG_DEBUG_INFO_DWARF4=y) are not specified.
This causes the wrong kernel to be built, and selftests to similarly
fail to build.

Additionally, in the BPF selftests kconfig file,
CONFIG_NF_CONNTRACK_MARK=y is specified, so that the 'u_int32_t mark'
field will be present in the definition of struct nf_conn.  While a
dependency of CONFIG_NF_CONNTRACK_MARK=y, CONFIG_NETFILTER_ADVANCED=y,
should be enabled by default, I've run into instances of
CONFIG_NF_CONNTRACK_MARK not being set because CONFIG_NETFILTER_ADVANCED
isn't set, and have to manually enable them with make menuconfig.

Let's add these missing kconfig options to the file so that the
necessary dependencies are in place to build vmlinux. Otherwise, we'll
get errors like this when we try to compile selftests and generate
vmlinux.h:

$ cd /path/to/bpf-next
$ make mrproper; make defconfig
$ cat tools/testing/selftests/config >> .config
$ make -j
...
$ cd tools/testing/selftests/bpf
$ make clean
$ make -j
...
  LD [M]
  tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko
  tools/testing/selftests/bpf/tools/build/bpftool/bootstrap/bpftool
  btf dump file vmlinux format c >
  tools/testing/selftests/bpf/tools/build/bpftool/vmlinux.h
  libbpf: failed to find '.BTF' ELF section in
  vmlinux
  Error: failed to load BTF from bpf-next/vmlinux:
  No data available
  make[1]: *** [Makefile:208:
  tools/testing/selftests/bpf/tools/build/bpftool/vmlinux.h]
  Error 195
  make[1]: *** Deleting file
  'tools/testing/selftests/bpf/tools/build/bpftool/vmlinux.h'
  make: *** [Makefile:261:
  tools/testing/selftests/bpf/tools/sbin/bpftool]
  Error 2

Signed-off-by: David Vernet 
Signed-off-by: Andrii Nakryiko 
Acked-by: Stanislav Fomichev 
Link: https://lore.kernel.org/bpf/20230602140108.1177900-1-void@manifault.com

selftests/bpf: Select CONFIG_FUNCTION_ERROR_INJECTION

2022-12-14T17:35:41+00:00

BPF selftests require CONFIG_FUNCTION_ERROR_INJECTION to work. However,
CONFIG_FUNCTION_ERROR_INJECTION is no longer 'y' by default after recent
changes. As a result, we are seeing errors like the following from BPF CI:

   bpf_testmod_test_read() is not modifiable
   __x64_sys_setdomainname is not sleepable
   __x64_sys_getpgid is not sleepable

Fix this by explicitly selecting CONFIG_FUNCTION_ERROR_INJECTION in the
selftest config.

Fixes: a4412fdd49dc ("error-injection: Add prompt for function error injection")
Reported-by: Daniel Müller 
Signed-off-by: Song Liu 
Signed-off-by: Andrii Nakryiko 
Signed-off-by: Daniel Borkmann 
Acked-by: Daniel Müller 
Link: https://lore.kernel.org/bpf/20221213220500.3427947-1-song@kernel.org

selftests/bpf: Use CONFIG_TEST_BPF=m instead of CONFIG_TEST_BPF=y

2022-12-07T00:33:16+00:00

CONFIG_TEST_BPF can only be a module, so let's indicate it as such in
the selftests config.

Signed-off-by: Daan De Meyer 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20221205131618.1524337-4-daan.j.demeyer@gmail.com

selftests/bpf: Use "is not set" instead of "=n"

2022-12-07T00:33:16+00:00

"=n" is not valid kconfig syntax. Use "is not set" instead to indicate
the option should be disabled.

Signed-off-by: Daan De Meyer 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20221205131618.1524337-3-daan.j.demeyer@gmail.com

selftests/bpf: add xfrm_info tests

2022-12-06T06:54:23+00:00

Test the xfrm_info kfunc helpers.

The test setup creates three name spaces - NS0, NS1, NS2.

XFRM tunnels are setup between NS0 and the two other NSs.

The kfunc helpers are used to steer traffic from NS0 to the other
NSs based on a userspace populated bpf global variable and validate
that the return traffic had arrived from the desired NS.

Signed-off-by: Eyal Birger 
Link: https://lore.kernel.org/r/20221203084659.1837829-5-eyal.birger@gmail.com
Signed-off-by: Martin KaFai Lau