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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Library of helpers for test scripts.
set -e
DIR=/sys/devices/virtual/misc/test_firmware
PROC_CONFIG="/proc/config.gz"
TEST_DIR=$(dirname $0)
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
print_reqs_exit()
{
echo "You must have the following enabled in your kernel:" >&2
cat $TEST_DIR/config >&2
exit $ksft_skip
}
test_modprobe()
{
if [ ! -d $DIR ]; then
print_reqs_exit
fi
}
check_mods()
{
local uid=$(id -u)
if [ $uid -ne 0 ]; then
echo "skip all tests: must be run as root" >&2
exit $ksft_skip
fi
trap "test_modprobe" EXIT
if [ ! -d $DIR ]; then
modprobe test_firmware
fi
if [ ! -f $PROC_CONFIG ]; then
if modprobe configs 2>/dev/null; then
echo "Loaded configs module"
if [ ! -f $PROC_CONFIG ]; then
echo "You must have the following enabled in your kernel:" >&2
cat $TEST_DIR/config >&2
echo "Resorting to old heuristics" >&2
fi
else
echo "Failed to load configs module, using old heuristics" >&2
fi
fi
}
check_setup()
{
HAS_FW_LOADER_USER_HELPER="$(kconfig_has CONFIG_FW_LOADER_USER_HELPER=y)"
HAS_FW_LOADER_USER_HELPER_FALLBACK="$(kconfig_has CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y)"
PROC_FW_IGNORE_SYSFS_FALLBACK="0"
PROC_FW_FORCE_SYSFS_FALLBACK="0"
if [ -z $PROC_SYS_DIR ]; then
PROC_SYS_DIR="/proc/sys/kernel"
fi
FW_PROC="${PROC_SYS_DIR}/firmware_config"
FW_FORCE_SYSFS_FALLBACK="$FW_PROC/force_sysfs_fallback"
FW_IGNORE_SYSFS_FALLBACK="$FW_PROC/ignore_sysfs_fallback"
if [ -f $FW_FORCE_SYSFS_FALLBACK ]; then
PROC_FW_FORCE_SYSFS_FALLBACK="$(cat $FW_FORCE_SYSFS_FALLBACK)"
fi
if [ -f $FW_IGNORE_SYSFS_FALLBACK ]; then
PROC_FW_IGNORE_SYSFS_FALLBACK="$(cat $FW_IGNORE_SYSFS_FALLBACK)"
fi
if [ "$PROC_FW_FORCE_SYSFS_FALLBACK" = "1" ]; then
HAS_FW_LOADER_USER_HELPER="yes"
HAS_FW_LOADER_USER_HELPER_FALLBACK="yes"
fi
if [ "$PROC_FW_IGNORE_SYSFS_FALLBACK" = "1" ]; then
HAS_FW_LOADER_USER_HELPER_FALLBACK="no"
HAS_FW_LOADER_USER_HELPER="no"
fi
if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then
OLD_TIMEOUT="$(cat /sys/class/firmware/timeout)"
fi
OLD_FWPATH="$(cat /sys/module/firmware_class/parameters/path)"
}
verify_reqs()
{
if [ "$TEST_REQS_FW_SYSFS_FALLBACK" = "yes" ]; then
if [ ! "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then
echo "usermode helper disabled so ignoring test"
exit 0
fi
fi
}
setup_tmp_file()
{
FWPATH=$(mktemp -d)
FW="$FWPATH/test-firmware.bin"
echo "ABCD0123" >"$FW"
NAME=$(basename "$FW")
if [ "$TEST_REQS_FW_SET_CUSTOM_PATH" = "yes" ]; then
echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path
fi
}
__setup_random_file()
{
RANDOM_FILE_PATH="$(mktemp -p $FWPATH)"
# mktemp says dry-run -n is unsafe, so...
if [[ "$1" = "fake" ]]; then
rm -rf $RANDOM_FILE_PATH
sync
else
echo "ABCD0123" >"$RANDOM_FILE_PATH"
fi
echo $RANDOM_FILE_PATH
}
setup_random_file()
{
echo $(__setup_random_file)
}
setup_random_file_fake()
{
echo $(__setup_random_file fake)
}
proc_set_force_sysfs_fallback()
{
if [ -f $FW_FORCE_SYSFS_FALLBACK ]; then
echo -n $1 > $FW_FORCE_SYSFS_FALLBACK
check_setup
fi
}
proc_set_ignore_sysfs_fallback()
{
if [ -f $FW_IGNORE_SYSFS_FALLBACK ]; then
echo -n $1 > $FW_IGNORE_SYSFS_FALLBACK
check_setup
fi
}
proc_restore_defaults()
{
proc_set_force_sysfs_fallback 0
proc_set_ignore_sysfs_fallback 0
}
test_finish()
{
if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then
echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout
fi
if [ "$TEST_REQS_FW_SET_CUSTOM_PATH" = "yes" ]; then
if [ "$OLD_FWPATH" = "" ]; then
# A zero-length write won't work; write a null byte
printf '\000' >/sys/module/firmware_class/parameters/path
else
echo -n "$OLD_FWPATH" >/sys/module/firmware_class/parameters/path
fi
fi
if [ -f $FW ]; then
rm -f "$FW"
fi
if [ -d $FWPATH ]; then
rm -rf "$FWPATH"
fi
proc_restore_defaults
}
kconfig_has()
{
if [ -f $PROC_CONFIG ]; then
if zgrep -q $1 $PROC_CONFIG 2>/dev/null; then
echo "yes"
else
echo "no"
fi
else
# We currently don't have easy heuristics to infer this
# so best we can do is just try to use the kernel assuming
# you had enabled it. This matches the old behaviour.
if [ "$1" = "CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y" ]; then
echo "yes"
elif [ "$1" = "CONFIG_FW_LOADER_USER_HELPER=y" ]; then
if [ -d /sys/class/firmware/ ]; then
echo yes
else
echo no
fi
fi
fi
}
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