path: root/tools/testing/selftests/media_tests
diff options
authorShuah Khan <shuahkh@osg.samsung.com>2016-06-17 18:12:04 -0600
committerShuah Khan <shuahkh@osg.samsung.com>2016-06-27 13:29:52 -0600
commitfe8777a8a0a144dee2eb59d00664184f1e49db4a (patch)
tree4d52746899386dba550b8a27dba04a2324247780 /tools/testing/selftests/media_tests
parentselftests: add media_device_open test (diff)
selftests: add media controller regression test scripts and document
Add regression test scripts open_loop_test.sh, and bind_unbind_sample.sh. Also add regression_test.txt that describes the regression test procedure. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'tools/testing/selftests/media_tests')
3 files changed, 65 insertions, 0 deletions
diff --git a/tools/testing/selftests/media_tests/bind_unbind_sample.sh b/tools/testing/selftests/media_tests/bind_unbind_sample.sh
new file mode 100755
index 000000000000..9f362f10631a
--- /dev/null
+++ b/tools/testing/selftests/media_tests/bind_unbind_sample.sh
@@ -0,0 +1,12 @@
+# Find device number in /sys/bus/usb/drivers/drivername
+# Edit this file to update the driver numer and name
+# Example test for uvcvideo driver
+# while :; do
+# i=$((i+1))
+# echo 1-5:1.0 > /sys/bus/usb/drivers/uvcvideo/unbind;
+# echo 1-5:1.0 > /sys/bus/usb/drivers/uvcvideo/bind;
+# clear
+# echo $i
diff --git a/tools/testing/selftests/media_tests/open_loop_test.sh b/tools/testing/selftests/media_tests/open_loop_test.sh
new file mode 100755
index 000000000000..dcd3c17efc17
--- /dev/null
+++ b/tools/testing/selftests/media_tests/open_loop_test.sh
@@ -0,0 +1,10 @@
+ i=0
+ while :; do
+ echo $file
+ i=$((i+1))
+ R=$(./media_device_open -d $file);
+ # clear
+ echo -e "Loop $i\n$R"
+ done
diff --git a/tools/testing/selftests/media_tests/regression_test.txt b/tools/testing/selftests/media_tests/regression_test.txt
new file mode 100644
index 000000000000..2627367681f7
--- /dev/null
+++ b/tools/testing/selftests/media_tests/regression_test.txt
@@ -0,0 +1,43 @@
+Testing for regressions in Media Controller API register, ioctl, syscall,
+and unregister paths. There have a few problems that result in user-after
+free on media_device, media_devnode, and cdev pointers when the driver is
+unbound while ioctl is in progress.
+Test Procedure:
+Run bin/unbind loop while ioctls are in progress.
+Run rmmod and modprobe.
+Disconnect the device.
+Build media_device_test
+cd tools/testing/selftests/media_tests
+Regressions test for cdev user-after free error on /dev/mediaX when driver
+is unbound:
+Start media_device_test to regression test media devnode dynamic alloc
+and cdev user-after-free fixes. This opens media dev files and sits in
+a loop running media ioctl MEDIA_IOC_DEVICE_INFO command once every 10
+seconds. The idea is when device file goes away, media devnode and cdev
+should stick around until this test exits.
+The test for a random number of iterations or until user kills it with a
+sleep 10 in between the ioctl calls.
+sudo ./media_device_test -d /dev/mediaX
+Regression test for media_devnode unregister race with ioctl_syscall:
+Start 6 open_loop_test.sh tests with different /dev/mediaX files. When
+device file goes away after unbind, device file name changes. Start the
+test with possible device names. If we start with /dev/media0 for example,
+after unbind, /dev/media1 or /dev/media2 could get created. The idea is
+keep ioctls going while bind/unbind runs.
+Copy bind_unbind_sample.txt and make changes to specify the driver name
+and number to run bind and unbind. Start the bind_unbind.sh
+Run dmesg looking for any user-after free errors or mutex lock errors.