#!/bin/sh # This validates that the kernel will load firmware out of its list of # firmware locations on disk. Since the user helper does similar work, # we reset the custom load directory to a location the user helper doesn't # know so we can be sure we're not accidentally testing the user helper. set -e modprobe test_firmware DIR=/sys/devices/virtual/misc/test_firmware # CONFIG_FW_LOADER_USER_HELPER has a sysfs class under /sys/class/firmware/ # These days no one enables CONFIG_FW_LOADER_USER_HELPER so check for that # as an indicator for CONFIG_FW_LOADER_USER_HELPER. HAS_FW_LOADER_USER_HELPER=$(if [ -d /sys/class/firmware/ ]; then echo yes; else echo no; fi) if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then OLD_TIMEOUT=$(cat /sys/class/firmware/timeout) fi OLD_FWPATH=$(cat /sys/module/firmware_class/parameters/path) FWPATH=$(mktemp -d) FW="$FWPATH/test-firmware.bin" test_finish() { if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout fi echo -n "$OLD_PATH" >/sys/module/firmware_class/parameters/path rm -f "$FW" rmdir "$FWPATH" } trap "test_finish" EXIT if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then # Turn down the timeout so failures don't take so long. echo 1 >/sys/class/firmware/timeout fi # Set the kernel search path. echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path # This is an unlikely real-world firmware content. :) echo "ABCD0123" >"$FW" NAME=$(basename "$FW") if printf '\000' >"$DIR"/trigger_request; then echo "$0: empty filename should not succeed" >&2 exit 1 fi if printf '\000' >"$DIR"/trigger_async_request; then echo "$0: empty filename should not succeed (async)" >&2 exit 1 fi # Request a firmware that doesn't exist, it should fail. if echo -n "nope-$NAME" >"$DIR"/trigger_request; then echo "$0: firmware shouldn't have loaded" >&2 exit 1 fi if diff -q "$FW" /dev/test_firmware >/dev/null ; then echo "$0: firmware was not expected to match" >&2 exit 1 else if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then echo "$0: timeout works" fi fi # This should succeed via kernel load or will fail after 1 second after # being handed over to the user helper, which won't find the fw either. if ! echo -n "$NAME" >"$DIR"/trigger_request ; then echo "$0: could not trigger request" >&2 exit 1 fi # Verify the contents are what we expect. if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then echo "$0: firmware was not loaded" >&2 exit 1 else echo "$0: filesystem loading works" fi # Try the asynchronous version too if ! echo -n "$NAME" >"$DIR"/trigger_async_request ; then echo "$0: could not trigger async request" >&2 exit 1 fi # Verify the contents are what we expect. if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then echo "$0: firmware was not loaded (async)" >&2 exit 1 else echo "$0: async filesystem loading works" fi exit 0 4c056ad01682393be56d2be237e81610'>trace/events/9p.h
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