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Commit | Line | Data |
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0a8adf58 KC |
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 | ||
0a8adf58 | 8 | DIR=/sys/devices/virtual/misc/test_firmware |
f5786313 LR |
9 | TEST_DIR=$(dirname $0) |
10 | ||
11 | test_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 | ||
21 | trap "test_modprobe" EXIT | |
22 | ||
23 | if [ ! -d $DIR ]; then | |
24 | modprobe test_firmware | |
25 | fi | |
0a8adf58 | 26 | |
1d0fbb34 LR |
27 | # CONFIG_FW_LOADER_USER_HELPER has a sysfs class under /sys/class/firmware/ |
28 | # These days no one enables CONFIG_FW_LOADER_USER_HELPER so check for that | |
29 | # as an indicator for CONFIG_FW_LOADER_USER_HELPER. | |
30 | HAS_FW_LOADER_USER_HELPER=$(if [ -d /sys/class/firmware/ ]; then echo yes; else echo no; fi) | |
31 | ||
32 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then | |
33 | OLD_TIMEOUT=$(cat /sys/class/firmware/timeout) | |
34 | fi | |
35 | ||
0a8adf58 KC |
36 | OLD_FWPATH=$(cat /sys/module/firmware_class/parameters/path) |
37 | ||
38 | FWPATH=$(mktemp -d) | |
39 | FW="$FWPATH/test-firmware.bin" | |
40 | ||
41 | test_finish() | |
42 | { | |
1d0fbb34 LR |
43 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then |
44 | echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout | |
45 | fi | |
0a8adf58 KC |
46 | echo -n "$OLD_PATH" >/sys/module/firmware_class/parameters/path |
47 | rm -f "$FW" | |
48 | rmdir "$FWPATH" | |
49 | } | |
50 | ||
51 | trap "test_finish" EXIT | |
52 | ||
1d0fbb34 LR |
53 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then |
54 | # Turn down the timeout so failures don't take so long. | |
55 | echo 1 >/sys/class/firmware/timeout | |
56 | fi | |
57 | ||
0a8adf58 KC |
58 | # Set the kernel search path. |
59 | echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path | |
60 | ||
61 | # This is an unlikely real-world firmware content. :) | |
62 | echo "ABCD0123" >"$FW" | |
63 | ||
64 | NAME=$(basename "$FW") | |
65 | ||
1b1fe542 BN |
66 | if printf '\000' >"$DIR"/trigger_request; then |
67 | echo "$0: empty filename should not succeed" >&2 | |
68 | exit 1 | |
69 | fi | |
70 | ||
71 | if printf '\000' >"$DIR"/trigger_async_request; then | |
72 | echo "$0: empty filename should not succeed (async)" >&2 | |
73 | exit 1 | |
74 | fi | |
75 | ||
0a8adf58 | 76 | # Request a firmware that doesn't exist, it should fail. |
1b1fe542 BN |
77 | if echo -n "nope-$NAME" >"$DIR"/trigger_request; then |
78 | echo "$0: firmware shouldn't have loaded" >&2 | |
79 | exit 1 | |
80 | fi | |
0a8adf58 KC |
81 | if diff -q "$FW" /dev/test_firmware >/dev/null ; then |
82 | echo "$0: firmware was not expected to match" >&2 | |
83 | exit 1 | |
84 | else | |
1d0fbb34 LR |
85 | if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then |
86 | echo "$0: timeout works" | |
87 | fi | |
0a8adf58 KC |
88 | fi |
89 | ||
90 | # This should succeed via kernel load or will fail after 1 second after | |
91 | # being handed over to the user helper, which won't find the fw either. | |
92 | if ! echo -n "$NAME" >"$DIR"/trigger_request ; then | |
93 | echo "$0: could not trigger request" >&2 | |
94 | exit 1 | |
95 | fi | |
96 | ||
97 | # Verify the contents are what we expect. | |
98 | if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then | |
99 | echo "$0: firmware was not loaded" >&2 | |
100 | exit 1 | |
101 | else | |
102 | echo "$0: filesystem loading works" | |
103 | fi | |
104 | ||
1b1fe542 BN |
105 | # Try the asynchronous version too |
106 | if ! echo -n "$NAME" >"$DIR"/trigger_async_request ; then | |
107 | echo "$0: could not trigger async request" >&2 | |
108 | exit 1 | |
109 | fi | |
110 | ||
111 | # Verify the contents are what we expect. | |
112 | if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then | |
113 | echo "$0: firmware was not loaded (async)" >&2 | |
114 | exit 1 | |
115 | else | |
116 | echo "$0: async filesystem loading works" | |
117 | fi | |
118 | ||
0a8adf58 | 119 | exit 0 |