1#!/bin/sh 2# This validates that the kernel will load firmware out of its list of 3# firmware locations on disk. Since the user helper does similar work, 4# we reset the custom load directory to a location the user helper doesn't 5# know so we can be sure we're not accidentally testing the user helper. 6set -e 7 8DIR=/sys/devices/virtual/misc/test_firmware 9TEST_DIR=$(dirname $0) 10 11test_modprobe() 12{ 13 if [ ! -d $DIR ]; then 14 echo "$0: $DIR not present" 15 echo "You must have the following enabled in your kernel:" 16 cat $TEST_DIR/config 17 exit 1 18 fi 19} 20 21trap "test_modprobe" EXIT 22 23if [ ! -d $DIR ]; then 24 modprobe test_firmware 25fi 26 27# CONFIG_FW_LOADER_USER_HELPER has a sysfs class under /sys/class/firmware/ 28# These days no one enables CONFIG_FW_LOADER_USER_HELPER so check for that 29# as an indicator for CONFIG_FW_LOADER_USER_HELPER. 30HAS_FW_LOADER_USER_HELPER=$(if [ -d /sys/class/firmware/ ]; then echo yes; else echo no; fi) 31 32if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 33 OLD_TIMEOUT=$(cat /sys/class/firmware/timeout) 34fi 35 36OLD_FWPATH=$(cat /sys/module/firmware_class/parameters/path) 37 38FWPATH=$(mktemp -d) 39FW="$FWPATH/test-firmware.bin" 40 41test_finish() 42{ 43 if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 44 echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout 45 fi 46 echo -n "$OLD_PATH" >/sys/module/firmware_class/parameters/path 47 rm -f "$FW" 48 rmdir "$FWPATH" 49} 50 51trap "test_finish" EXIT 52 53if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 54 # Turn down the timeout so failures don't take so long. 55 echo 1 >/sys/class/firmware/timeout 56fi 57 58# Set the kernel search path. 59echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path 60 61# This is an unlikely real-world firmware content. :) 62echo "ABCD0123" >"$FW" 63 64NAME=$(basename "$FW") 65 66if printf '\000' >"$DIR"/trigger_request 2> /dev/null; then 67 echo "$0: empty filename should not succeed" >&2 68 exit 1 69fi 70 71if printf '\000' >"$DIR"/trigger_async_request 2> /dev/null; then 72 echo "$0: empty filename should not succeed (async)" >&2 73 exit 1 74fi 75 76# Request a firmware that doesn't exist, it should fail. 77if echo -n "nope-$NAME" >"$DIR"/trigger_request 2> /dev/null; then 78 echo "$0: firmware shouldn't have loaded" >&2 79 exit 1 80fi 81if diff -q "$FW" /dev/test_firmware >/dev/null ; then 82 echo "$0: firmware was not expected to match" >&2 83 exit 1 84else 85 if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then 86 echo "$0: timeout works" 87 fi 88fi 89 90# This should succeed via kernel load or will fail after 1 second after 91# being handed over to the user helper, which won't find the fw either. 92if ! echo -n "$NAME" >"$DIR"/trigger_request ; then 93 echo "$0: could not trigger request" >&2 94 exit 1 95fi 96 97# Verify the contents are what we expect. 98if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then 99 echo "$0: firmware was not loaded" >&2 100 exit 1 101else 102 echo "$0: filesystem loading works" 103fi 104 105# Try the asynchronous version too 106if ! echo -n "$NAME" >"$DIR"/trigger_async_request ; then 107 echo "$0: could not trigger async request" >&2 108 exit 1 109fi 110 111# Verify the contents are what we expect. 112if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then 113 echo "$0: firmware was not loaded (async)" >&2 114 exit 1 115else 116 echo "$0: async filesystem loading works" 117fi 118 119exit 0 120