[PATCH bpf-next] bpf/selftests: remove lirc test
From: Bastien Curutchet (eBPF Foundation)
Date: Fri Jun 05 2026 - 04:04:26 EST
test_lirc_mode.sh fails with the following when run from the vmtest VM:
root@(none):/root/bpf# ./test_lirc_mode2.sh
Failed to read decoded IR: Resource temporarily unavailable
FAIL: lirc_mode2
As part of the ongoing effort to get rid of any standalone test, this
script should either be fixed and converted to test_progs or removed.
Remove it.
Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@xxxxxxxxxxx>
---
Hi all,
I went back up to v6.13 without finding a working commit. Maybe
something's wrong with my setup but comments inside
test_lirc_mode2_user.c say that three kernel configurations are needed
to have the test working and I ensured they were indeed enabled (with
s/BPF_RAWIR_EVENT/BPF_LIRC_MODE2).
If someone disagrees with this removal please speak up and I'll
investigate this further.
Best regards,
Bastien
---
tools/testing/selftests/bpf/.gitignore | 1 -
tools/testing/selftests/bpf/Makefile | 3 -
.../selftests/bpf/progs/test_lirc_mode2_kern.c | 26 ---
tools/testing/selftests/bpf/test_lirc_mode2.sh | 41 -----
tools/testing/selftests/bpf/test_lirc_mode2_user.c | 177 ---------------------
5 files changed, 248 deletions(-)
diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index 986a6389186ba..b815bf0d88774 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -17,7 +17,6 @@ test_verifier_log
feature
urandom_read
test_sockmap
-test_lirc_mode2_user
flow_dissector_load
test_tcpnotify_user
test_libbpf
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index bc049620c7745..653c949fc854d 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -117,7 +117,6 @@ TEST_FILES = xsk_prereqs.sh $(wildcard progs/btf_dump_test_case_*.c)
# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
- test_lirc_mode2.sh \
test_bpftool_build.sh \
test_doc_build.sh \
test_xsk.sh \
@@ -135,7 +134,6 @@ TEST_GEN_PROGS_EXTENDED = \
bench \
flow_dissector_load \
test_cpp \
- test_lirc_mode2_user \
veristat \
xdp_features \
xdp_hw_metadata \
@@ -325,7 +323,6 @@ $(OUTPUT)/test_sockmap: $(CGROUP_HELPERS) $(TESTING_HELPERS)
$(OUTPUT)/test_tcpnotify_user: $(CGROUP_HELPERS) $(TESTING_HELPERS) $(TRACE_HELPERS)
$(OUTPUT)/test_sock_fields: $(CGROUP_HELPERS) $(TESTING_HELPERS)
$(OUTPUT)/test_tag: $(TESTING_HELPERS)
-$(OUTPUT)/test_lirc_mode2_user: $(TESTING_HELPERS)
$(OUTPUT)/flow_dissector_load: $(TESTING_HELPERS)
$(OUTPUT)/test_maps: $(TESTING_HELPERS)
$(OUTPUT)/test_verifier: $(TESTING_HELPERS) $(CAP_HELPERS) $(UNPRIV_HELPERS)
diff --git a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c b/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
deleted file mode 100644
index 7a6620671a833..0000000000000
--- a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// test ir decoder
-//
-// Copyright (C) 2018 Sean Young <sean@xxxxxxxx>
-
-#include <linux/bpf.h>
-#include <linux/lirc.h>
-#include <bpf/bpf_helpers.h>
-
-SEC("lirc_mode2")
-int bpf_decoder(unsigned int *sample)
-{
- if (LIRC_IS_PULSE(*sample)) {
- unsigned int duration = LIRC_VALUE(*sample);
-
- if (duration & 0x10000)
- bpf_rc_keydown(sample, 0x40, duration & 0xffff, 0);
- if (duration & 0x20000)
- bpf_rc_pointer_rel(sample, (duration >> 8) & 0xff,
- duration & 0xff);
- }
-
- return 0;
-}
-
-char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/test_lirc_mode2.sh b/tools/testing/selftests/bpf/test_lirc_mode2.sh
deleted file mode 100755
index 5252b91f48a18..0000000000000
--- a/tools/testing/selftests/bpf/test_lirc_mode2.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0
-
-# Kselftest framework requirement - SKIP code is 4.
-ksft_skip=4
-ret=$ksft_skip
-
-msg="skip all tests:"
-if [ $UID != 0 ]; then
- echo $msg please run this as root >&2
- exit $ksft_skip
-fi
-
-GREEN='\033[0;92m'
-RED='\033[0;31m'
-NC='\033[0m' # No Color
-
-modprobe rc-loopback
-
-for i in /sys/class/rc/rc*
-do
- if grep -q DRV_NAME=rc-loopback $i/uevent
- then
- LIRCDEV=$(grep DEVNAME= $i/lirc*/uevent | sed sQDEVNAME=Q/dev/Q)
- INPUTDEV=$(grep DEVNAME= $i/input*/event*/uevent | sed sQDEVNAME=Q/dev/Q)
- fi
-done
-
-if [ -n "$LIRCDEV" ];
-then
- TYPE=lirc_mode2
- ./test_lirc_mode2_user $LIRCDEV $INPUTDEV
- ret=$?
- if [ $ret -ne 0 ]; then
- echo -e ${RED}"FAIL: $TYPE"${NC}
- else
- echo -e ${GREEN}"PASS: $TYPE"${NC}
- fi
-fi
-
-exit $ret
diff --git a/tools/testing/selftests/bpf/test_lirc_mode2_user.c b/tools/testing/selftests/bpf/test_lirc_mode2_user.c
deleted file mode 100644
index 88e4aeab21b7b..0000000000000
--- a/tools/testing/selftests/bpf/test_lirc_mode2_user.c
+++ /dev/null
@@ -1,177 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// test ir decoder
-//
-// Copyright (C) 2018 Sean Young <sean@xxxxxxxx>
-
-// A lirc chardev is a device representing a consumer IR (cir) device which
-// can receive infrared signals from remote control and/or transmit IR.
-//
-// IR is sent as a series of pulses and space somewhat like morse code. The
-// BPF program can decode this into scancodes so that rc-core can translate
-// this into input key codes using the rc keymap.
-//
-// This test works by sending IR over rc-loopback, so the IR is processed by
-// BPF and then decoded into scancodes. The lirc chardev must be the one
-// associated with rc-loopback, see the output of ir-keytable(1).
-//
-// The following CONFIG options must be enabled for the test to succeed:
-// CONFIG_RC_CORE=y
-// CONFIG_BPF_RAWIR_EVENT=y
-// CONFIG_RC_LOOPBACK=y
-
-// Steps:
-// 1. Open the /dev/lircN device for rc-loopback (given on command line)
-// 2. Attach bpf_lirc_mode2 program which decodes some IR.
-// 3. Send some IR to the same IR device; since it is loopback, this will
-// end up in the bpf program
-// 4. bpf program should decode IR and report keycode
-// 5. We can read keycode from same /dev/lirc device
-
-#include <linux/bpf.h>
-#include <linux/input.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <poll.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#include "bpf_util.h"
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include "testing_helpers.h"
-
-int main(int argc, char **argv)
-{
- struct bpf_object *obj;
- int ret, lircfd, progfd, inputfd;
- int testir1 = 0x1dead;
- int testir2 = 0x20101;
- u32 prog_ids[10], prog_flags[10], prog_cnt;
-
- if (argc != 3) {
- printf("Usage: %s /dev/lircN /dev/input/eventM\n", argv[0]);
- return 2;
- }
-
- ret = bpf_prog_test_load("test_lirc_mode2_kern.bpf.o",
- BPF_PROG_TYPE_LIRC_MODE2, &obj, &progfd);
- if (ret) {
- printf("Failed to load bpf program\n");
- return 1;
- }
-
- lircfd = open(argv[1], O_RDWR | O_NONBLOCK);
- if (lircfd == -1) {
- printf("failed to open lirc device %s: %m\n", argv[1]);
- return 1;
- }
-
- /* Let's try detach it before it was ever attached */
- ret = bpf_prog_detach2(progfd, lircfd, BPF_LIRC_MODE2);
- if (ret != -ENOENT) {
- printf("bpf_prog_detach2 not attached should fail: %m\n");
- return 1;
- }
-
- inputfd = open(argv[2], O_RDONLY | O_NONBLOCK);
- if (inputfd == -1) {
- printf("failed to open input device %s: %m\n", argv[1]);
- return 1;
- }
-
- prog_cnt = 10;
- ret = bpf_prog_query(lircfd, BPF_LIRC_MODE2, 0, prog_flags, prog_ids,
- &prog_cnt);
- if (ret) {
- printf("Failed to query bpf programs on lirc device: %m\n");
- return 1;
- }
-
- if (prog_cnt != 0) {
- printf("Expected nothing to be attached\n");
- return 1;
- }
-
- ret = bpf_prog_attach(progfd, lircfd, BPF_LIRC_MODE2, 0);
- if (ret) {
- printf("Failed to attach bpf to lirc device: %m\n");
- return 1;
- }
-
- /* Write raw IR */
- ret = write(lircfd, &testir1, sizeof(testir1));
- if (ret != sizeof(testir1)) {
- printf("Failed to send test IR message: %m\n");
- return 1;
- }
-
- struct pollfd pfd = { .fd = inputfd, .events = POLLIN };
- struct input_event event;
-
- for (;;) {
- poll(&pfd, 1, 100);
-
- /* Read decoded IR */
- ret = read(inputfd, &event, sizeof(event));
- if (ret != sizeof(event)) {
- printf("Failed to read decoded IR: %m\n");
- return 1;
- }
-
- if (event.type == EV_MSC && event.code == MSC_SCAN &&
- event.value == 0xdead) {
- break;
- }
- }
-
- /* Write raw IR */
- ret = write(lircfd, &testir2, sizeof(testir2));
- if (ret != sizeof(testir2)) {
- printf("Failed to send test IR message: %m\n");
- return 1;
- }
-
- for (;;) {
- poll(&pfd, 1, 100);
-
- /* Read decoded IR */
- ret = read(inputfd, &event, sizeof(event));
- if (ret != sizeof(event)) {
- printf("Failed to read decoded IR: %m\n");
- return 1;
- }
-
- if (event.type == EV_REL && event.code == REL_Y &&
- event.value == 1 ) {
- break;
- }
- }
-
- prog_cnt = 10;
- ret = bpf_prog_query(lircfd, BPF_LIRC_MODE2, 0, prog_flags, prog_ids,
- &prog_cnt);
- if (ret) {
- printf("Failed to query bpf programs on lirc device: %m\n");
- return 1;
- }
-
- if (prog_cnt != 1) {
- printf("Expected one program to be attached\n");
- return 1;
- }
-
- /* Let's try detaching it now it is actually attached */
- ret = bpf_prog_detach2(progfd, lircfd, BPF_LIRC_MODE2);
- if (ret) {
- printf("bpf_prog_detach2: returned %m\n");
- return 1;
- }
-
- return 0;
-}
---
base-commit: 73f574b0cd0ef87a25afdffe1d907b55f7fcc940
change-id: 20260604-remove-lirc-test-fc8afa634f3a
Best regards,
--
Bastien Curutchet (eBPF Foundation) <bastien.curutchet@xxxxxxxxxxx>