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test_firmware: test three firmware kernel configs using a proc knob

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Since we now have knobs to twiddle what used to be set on kernel
configurations we can build one base kernel configuration and modify
behaviour to mimic such kernel configurations to test them.

Provided you build a kernel with:

CONFIG_TEST_FIRMWARE=y
CONFIG_FW_LOADER=y
CONFIG_FW_LOADER_USER_HELPER=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y

We should now be able test all possible kernel configurations
when FW_LOADER=y. Note that when FW_LOADER=m we just don't provide
the built-in functionality of the built-in firmware.

If you're on an old kernel and either don't have /proc/config.gz
(CONFIG_IKCONFIG_PROC) or haven't enabled CONFIG_FW_LOADER_USER_HELPER
we cannot run these dynamic tests, so just run both scripts just
as we used to before making blunt assumptions about your setup
and requirements exactly as we did before.

Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Luis R. Rodriguez
2018-03-10 06:14:54 -08:00
committed by Greg Kroah-Hartman
parent f5a614519e
commit b3cf21fae1
3 changed files with 122 additions and 1 deletions
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51
tools/testing/selftests/firmware/fw_lib.sh
View File

@@ -47,6 +47,34 @@ 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)"
@@ -76,6 +104,28 @@ setup_tmp_file()
fi
}
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
@@ -93,6 +143,7 @@ test_finish()
if [ -d $FWPATH ]; then
rm -rf "$FWPATH"
fi
proc_restore_defaults
}
kconfig_has()