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