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test_firmware: Test partial read support

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Add additional hooks to test_firmware to pass in support
for partial file read using request_firmware_into_buf():

	buf_size: size of buffer to request firmware into
	partial: indicates that a partial file request is being made
	file_offset: to indicate offset into file to request

Also update firmware selftests to use the new partial read test API.

Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201002173828.2099543-17-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Scott Branden
2020-10-02 10:38:28 -07:00
committed by Greg Kroah-Hartman
parent 59cdb23ca2
commit 5d90e05c0e
2 changed files with 233 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
tools/testing/selftests/firmware/fw_filesystem.sh
View File

@@ -149,6 +149,26 @@ config_unset_into_buf()
echo 0 > $DIR/config_into_buf
}
config_set_buf_size()
{
echo $1 > $DIR/config_buf_size
}
config_set_file_offset()
{
echo $1 > $DIR/config_file_offset
}
config_set_partial()
{
echo 1 > $DIR/config_partial
}
config_unset_partial()
{
echo 0 > $DIR/config_partial
}
config_set_sync_direct()
{
echo 1 > $DIR/config_sync_direct
@@ -207,6 +227,35 @@ read_firmwares()
done
}
read_partial_firmwares()
{
if [ "$(cat $DIR/config_into_buf)" == "1" ]; then
fwfile="${FW_INTO_BUF}"
else
fwfile="${FW}"
fi
if [ "$1" = "xzonly" ]; then
fwfile="${fwfile}-orig"
fi
# Strip fwfile down to match partial offset and length
partial_data="$(cat $fwfile)"
partial_data="${partial_data:$2:$3}"
for i in $(seq 0 3); do
config_set_read_fw_idx $i
read_firmware="$(cat $DIR/read_firmware)"
# Verify the contents are what we expect.
if [ $read_firmware != $partial_data ]; then
echo "request #$i: partial firmware was not loaded" >&2
exit 1
fi
done
}
read_firmwares_expect_nofile()
{
for i in $(seq 0 3); do
@@ -242,6 +291,21 @@ test_batched_request_firmware_into_buf_nofile()
echo "OK"
}
test_request_partial_firmware_into_buf_nofile()
{
echo -n "Test request_partial_firmware_into_buf() off=$1 size=$2 nofile: "
config_reset
config_set_name nope-test-firmware.bin
config_set_into_buf
config_set_partial
config_set_buf_size $2
config_set_file_offset $1
config_trigger_sync
read_firmwares_expect_nofile
release_all_firmware
echo "OK"
}
test_batched_request_firmware_direct_nofile()
{
echo -n "Batched request_firmware_direct() nofile try #$1: "
@@ -356,6 +420,21 @@ test_request_firmware_nowait_custom()
echo "OK"
}
test_request_partial_firmware_into_buf()
{
echo -n "Test request_partial_firmware_into_buf() off=$1 size=$2: "
config_reset
config_set_name $TEST_FIRMWARE_INTO_BUF_FILENAME
config_set_into_buf
config_set_partial
config_set_buf_size $2
config_set_file_offset $1
config_trigger_sync
read_partial_firmwares normal $1 $2
release_all_firmware
echo "OK"
}
# Only continue if batched request triggers are present on the
# test-firmware driver
test_config_present
@@ -383,6 +462,12 @@ for i in $(seq 1 5); do
test_request_firmware_nowait_custom $i normal
done
# Partial loads cannot use fallback, so do not repeat tests.
test_request_partial_firmware_into_buf 0 10
test_request_partial_firmware_into_buf 0 5
test_request_partial_firmware_into_buf 1 6
test_request_partial_firmware_into_buf 2 10
# Test for file not found, errors are expected, the failure would be
# a hung task, which would require a hard reset.
echo
@@ -407,6 +492,12 @@ for i in $(seq 1 5); do
test_request_firmware_nowait_custom_nofile $i
done
# Partial loads cannot use fallback, so do not repeat tests.
test_request_partial_firmware_into_buf_nofile 0 10
test_request_partial_firmware_into_buf_nofile 0 5
test_request_partial_firmware_into_buf_nofile 1 6
test_request_partial_firmware_into_buf_nofile 2 10
test "$HAS_FW_LOADER_COMPRESS" != "yes" && exit 0
# test with both files present