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(-)
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@bootlin.com>
---
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) $(UNPRIV_HELPERS)
diff --git a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c b/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
deleted file mode 100644
index 7a6620671a833..0000000000000
--- a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// test ir decoder
-//
-// Copyright (C) 2018 Sean Young <sean@mess.org>
-
-#include <linux/bpf.h>
-#include <linux/lirc.h>
-#include <bpf/bpf_helpers.h>
-
-SEC("lirc_mode2")
-int bpf_decoder(unsigned int *sample)
-{
- if (LIRC_IS_PULSE(*sample)) {
- unsigned int duration = LIRC_VALUE(*sample);
-
- if (duration & 0x10000)
- bpf_rc_keydown(sample, 0x40, duration & 0xffff, 0);
- if (duration & 0x20000)
- bpf_rc_pointer_rel(sample, (duration >> 8) & 0xff,
- duration & 0xff);
- }
-
- return 0;
-}
-
-char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/test_lirc_mode2.sh b/tools/testing/selftests/bpf/test_lirc_mode2.sh
deleted file mode 100755
index 5252b91f48a18..0000000000000
--- a/tools/testing/selftests/bpf/test_lirc_mode2.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0
-
-# Kselftest framework requirement - SKIP code is 4.
-ksft_skip=4
-ret=$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@mess.org>
-
-// 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@bootlin.com>On Fri, Jun 5, 2026 at 12:58 AM Bastien Curutchet (eBPF Foundation)
<bastien.curutchet@bootlin.com> wrote:
>
> 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.
cc Sean
> Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
> ---
> 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) $(UNPRIV_HELPERS)
> diff --git a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c b/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
> deleted file mode 100644
> index 7a6620671a833..0000000000000
> --- a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
> +++ /dev/null
> @@ -1,26 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -// test ir decoder
> -//
> -// Copyright (C) 2018 Sean Young <sean@mess.org>
> -
> -#include <linux/bpf.h>
> -#include <linux/lirc.h>
> -#include <bpf/bpf_helpers.h>
> -
> -SEC("lirc_mode2")
> -int bpf_decoder(unsigned int *sample)
> -{
> - if (LIRC_IS_PULSE(*sample)) {
> - unsigned int duration = LIRC_VALUE(*sample);
> -
> - if (duration & 0x10000)
> - bpf_rc_keydown(sample, 0x40, duration & 0xffff, 0);
> - if (duration & 0x20000)
> - bpf_rc_pointer_rel(sample, (duration >> 8) & 0xff,
> - duration & 0xff);
> - }
> -
> - return 0;
> -}
> -
> -char _license[] SEC("license") = "GPL";
> diff --git a/tools/testing/selftests/bpf/test_lirc_mode2.sh b/tools/testing/selftests/bpf/test_lirc_mode2.sh
> deleted file mode 100755
> index 5252b91f48a18..0000000000000
> --- a/tools/testing/selftests/bpf/test_lirc_mode2.sh
> +++ /dev/null
> @@ -1,41 +0,0 @@
> -#!/bin/bash
> -# SPDX-License-Identifier: GPL-2.0
> -
> -# Kselftest framework requirement - SKIP code is 4.
> -ksft_skip=4
> -ret=$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@mess.org>
> -
> -// 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@bootlin.com>
>
On Fri, Jun 05, 2026 at 06:39:51AM -0700, Alexei Starovoitov wrote:
> On Fri, Jun 5, 2026 at 12:58 AM Bastien Curutchet (eBPF Foundation)
> <bastien.curutchet@bootlin.com> wrote:
> >
> > 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.
>
> cc Sean
I've sent a fix to for the test in a separate email.
This regressed a long time ago; is anyone running these tests? There is
not much point to selftests if they're not run by anyone. I should add
them to linux-media CI, but is anyone in bpf running them?
I am not familiar with test_progs, what's that?
Sean
> > Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
> > ---
> > 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) $(UNPRIV_HELPERS)
> > diff --git a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c b/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
> > deleted file mode 100644
> > index 7a6620671a833..0000000000000
> > --- a/tools/testing/selftests/bpf/progs/test_lirc_mode2_kern.c
> > +++ /dev/null
> > @@ -1,26 +0,0 @@
> > -// SPDX-License-Identifier: GPL-2.0
> > -// test ir decoder
> > -//
> > -// Copyright (C) 2018 Sean Young <sean@mess.org>
> > -
> > -#include <linux/bpf.h>
> > -#include <linux/lirc.h>
> > -#include <bpf/bpf_helpers.h>
> > -
> > -SEC("lirc_mode2")
> > -int bpf_decoder(unsigned int *sample)
> > -{
> > - if (LIRC_IS_PULSE(*sample)) {
> > - unsigned int duration = LIRC_VALUE(*sample);
> > -
> > - if (duration & 0x10000)
> > - bpf_rc_keydown(sample, 0x40, duration & 0xffff, 0);
> > - if (duration & 0x20000)
> > - bpf_rc_pointer_rel(sample, (duration >> 8) & 0xff,
> > - duration & 0xff);
> > - }
> > -
> > - return 0;
> > -}
> > -
> > -char _license[] SEC("license") = "GPL";
> > diff --git a/tools/testing/selftests/bpf/test_lirc_mode2.sh b/tools/testing/selftests/bpf/test_lirc_mode2.sh
> > deleted file mode 100755
> > index 5252b91f48a18..0000000000000
> > --- a/tools/testing/selftests/bpf/test_lirc_mode2.sh
> > +++ /dev/null
> > @@ -1,41 +0,0 @@
> > -#!/bin/bash
> > -# SPDX-License-Identifier: GPL-2.0
> > -
> > -# Kselftest framework requirement - SKIP code is 4.
> > -ksft_skip=4
> > -ret=$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@mess.org>
> > -
> > -// 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@bootlin.com>
> >
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