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selftests/ftrace: Fix eventfs ownership testcase to find mount point

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Fix eventfs ownership testcase to find mount point if stat -c "%m" failed.
This can happen on the system based on busybox. In this case, this will
try to use the current working directory, which should be a tracefs top
directory (and eventfs is mounted as a part of tracefs.)
If it does not work, the test is skipped as UNRESOLVED because of
the environmental problem.

Fixes: ee9793be08 ("tracing/selftests: Add ownership modification tests for eventfs")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Masami Hiramatsu (Google) 2024-09-05 00:30:21 +09:00 committed by Shuah Khan
parent b4bcdff7e8
commit f0a6ecebd8
1 changed files with 12 additions and 0 deletions
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12
tools/testing/selftests/ftrace/test.d/00basic/test_ownership.tc
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@ -6,6 +6,18 @@ original_group=`stat -c "%g" .`
original_owner=`stat -c "%u" .`
mount_point=`stat -c '%m' .`
# If stat -c '%m' does not work (e.g. busybox) or failed, try to use the
# current working directory (which should be a tracefs) as the mount point.
if [ ! -d "$mount_point" ]; then
if mount | grep -qw $PWD ; then
mount_point=$PWD
else
# If PWD doesn't work, that is an environmental problem.
exit_unresolved
fi
fi
mount_options=`mount | grep "$mount_point" | sed -e 's/.*(\(.*\)).*/\1/'`
# find another owner and group that is not the original