linux.git/tools/testing/selftests/ftrace/test.d/functions, branch vsnprintf

tracing/selftests: Add tracefs mount options test

2024-11-01T12:57:55+00:00

Add a selftest to check that the tracefs gid mount option is applied
correctly.

   ./ftracetest test.d/00basic/mount_options.tc

Use the new readme string "[gid=] as a requirement and also update
test_ownership.tc requirements to use this.

Cc: Eric Sandeen 
Cc: Mathieu Desnoyers 
Cc: Shuah Khan 
Cc: Ali Zahraee 
Cc: Christian Brauner 
Cc: David Howells 
Cc: Masami Hiramatsu 
Link: https://lore.kernel.org/20241030171928.4168869-4-kaleshsingh@google.com
Signed-off-by: Kalesh Singh 
Signed-off-by: Steven Rostedt (Google)

selftests/ftrace: Add check for ping command for trigger tests

2022-10-28T08:01:11+00:00

All these tests depend on the ping command and will fail if it is not
found. Allow tests to specify dependencies on programs through the
'requires' field. Add dependency on 'ping' for some of the trigger
tests.

Link: https://lore.kernel.org/all/20221017104312.16af5467@gandalf.local.home/
Reported-by: Akanksha J N 
Acked-by: Masami Hiramatsu (Google) 
Suggested-by: Steven Rostedt (Google) 
Reviewed-by: Steven Rostedt (Google) 
Signed-off-by: Naveen N. Rao 
Signed-off-by: Shuah Khan

selftests/ftrace: Stop tracing while reading the trace file by default

2021-10-27T00:27:19+00:00

Stop tracing while reading the trace file by default, to prevent
the test results while checking it and to avoid taking a long time
to check the result.
If there is any testcase which wants to test the tracing while reading
the trace file, please override this setting inside the test case.

This also recovers the pause-on-trace when clean it up.

Link: https://lkml.kernel.org/r/163529053143.690749.15365238954175942026.stgit@devnote2

Signed-off-by: Masami Hiramatsu 
Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Fix requirement check of README file

2021-08-21T14:25:00+00:00

The selftest for ftrace checks some features by checking if the README has
text that states the feature is supported by that kernel. Unfortunately,
this check gives false positives because it many not be checked if there's
spaces in the string to check. This is due to the compare between the
required variable with the ":README" string stripped, because neither has
quotes around them.

Link: https://lkml.kernel.org/r/20210820204742.087177341@goodmis.org

Cc: "Tzvetomir Stoyanov" 
Cc: Tom Zanussi 
Cc: Shuah Khan 
Cc: Shuah Khan 
Cc: linux-kselftest@vger.kernel.org
Cc: stable@vger.kernel.org
Fixes: 1b8eec510ba64 ("selftests/ftrace: Support ":README" suffix for requires")
Acked-by: Masami Hiramatsu 
Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Add clear_dynamic_events() to test cases

2021-08-20T18:19:27+00:00

Add a function to remove all dynamic events from the tracing directory. It
requires a loop as some of the dynamic events may depend on others being
removed first. Also add a safety that prevents it from looping infinitely
due to a bug where an event never gets removed.

Link: https://lkml.kernel.org/r/20210819152825.348941368@goodmis.org

Cc: "Tzvetomir Stoyanov" 
Cc: Tom Zanussi 
Cc: Shuah Khan 
Cc: Shuah Khan 
Cc: linux-kselftest@vger.kernel.org
Acked-by: Masami Hiramatsu 
Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Use $FUNCTION_FORK to reference kernel fork function

2020-10-27T22:44:18+00:00

Commit cad6967ac108 ("fork: introduce kernel_clone()") replaced "_do_fork()"
with "kernel_clone()". The ftrace selftests reference the fork function in
several of the tests. The rename will make the tests break, but if those
names are changed in the tests, they would then break on older kernels. The
same set of tests should pass older kernels if they have previously passed.
Obviously, a new test may not work on older kernels if the test was added
due to a bug or a new feature.

The setup of ftracetest will now create a $FUNCTION_FORK bash variable
that will contain "_do_fork" for older kernels and "kernel_clone" for newer
ones. It figures out the proper name by examining /proc/kallsyms.

Note, available_filter_functions could also be used, but because some tests
should be able to pass without function tracing enabled, it could not be
used.

Fixes: eea11285dab3 ("tracing: switch to kernel_clone()")
Signed-off-by: Steven Rostedt (VMware) 
Acked-by: Masami Hiramatsu 
Signed-off-by: Shuah Khan

selftests/ftrace: Support ":README" suffix for requires

2020-06-16T16:42:47+00:00

Add ":README" suffix support for the requires list, so that
the testcase can list up the required string for README file
to the requires list.

Note that the required string is treated as a fixed string,
instead of regular expression. Also, the testcase can specify
a string containing spaces with quotes. E.g.

# requires: "place: [:]":README

Signed-off-by: Masami Hiramatsu 
Reviewed-by: Tom Zanussi 
Signed-off-by: Shuah Khan

selftests/ftrace: Support ":tracer" suffix for requires

2020-06-16T16:42:10+00:00

Add ":tracer" suffix support for the requires list, so that
the testcase can list up the required tracer (e.g. function)
to the requires list.

For example, if the testcase requires function_graph tracer,
it can write requires list as below instead of checking
available_tracers.

# requires: function_graph:tracer

Signed-off-by: Masami Hiramatsu 
Reviewed-by: Tom Zanussi 
Signed-off-by: Shuah Khan

selftests/ftrace: Convert check_filter_file() with requires list

2020-06-16T16:41:32+00:00

Since check_filter_file() is basically checking the filter
tracefs file, we can convert it into requires list.

Signed-off-by: Masami Hiramatsu 
Reviewed-by: Tom Zanussi 
Signed-off-by: Shuah Khan

selftests/ftrace: Add "requires:" list support

2020-06-16T15:19:08+00:00

Introduce "requires:" list to check required ftrace interface
for each test. This will simplify the interface checking code
and unify the error message. Another good point is, it can
skip the ftrace initializing.

Note that this requires list must be written as a shell
comment.

Signed-off-by: Masami Hiramatsu 
Reviewed-by: Tom Zanussi 
Signed-off-by: Shuah Khan