| #!/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 |
| 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 |
| 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 2> /dev/null; then |
| echo "$0: empty filename should not succeed" >&2 |
| exit 1 |
| fi |
| |
| if printf '\000' >"$DIR"/trigger_async_request 2> /dev/null; 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 2> /dev/null; 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 |