[LTP] [RFC PATCH] API: Allow testing of kernel features in development

[Richard Palethorpe]

Add an unstable kernel ABI flag and a runtest file for unstable
tests. This means we can add tests which are likely to be broken by
changes in the kernel ABI. Without disrupting LTP releases which are
required to be stable.

Users who require stability can filter the tests with this flag
or not schedule the unstable runtest file(s).

Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>
---

How about adding this to the fanotify22 patch?

 include/tst_test.h        | 12 ++++++++++++
 lib/tst_test.c            |  6 ++++++
 runtest/syscalls-unstable |  3 +++
 3 files changed, 21 insertions(+)
 create mode 100644 runtest/syscalls-unstable

diff --git a/include/tst_test.h b/include/tst_test.h
index 450ddf086..ff31e972e 100644
--- a/include/tst_test.h
+++ b/include/tst_test.h
@@ -174,6 +174,18 @@ struct tst_test {
 	int skip_in_lockdown:1;
 	int skip_in_compat:1;
 
+	/*
+	 * Test is for a feature that has not been added to the stable
+	 * kernel ABI. That is, it's for a feature only available in
+	 * linux-next, an RC or some other development branch.
+	 *
+	 * This string should be set to some text describing the
+	 * kernel branch and version the test was developed
+	 * against. e.g. "5.16 RC2", "linux-next-20211220",
+	 * "net-next".
+	 */
+	const char *const unstable_abi_version;
+
 	/*
 	 * The skip_filesystem is a NULL terminated list of filesystems the
 	 * test does not support. It can also be used to disable whole class of
diff --git a/lib/tst_test.c b/lib/tst_test.c
index 9b51bb5be..babb250d0 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -1013,6 +1013,12 @@ static void do_setup(int argc, char *argv[])
 	if (!tst_test)
 		tst_brk(TBROK, "No tests to run");
 
+	if (tst_test->unstable_abi_version) {
+		tst_res(TINFO,
+			"This test was developed against pre-release kernel: %s",
+			tst_test->unstable_abi_version);
+	}
+
 	if (tst_test->tconf_msg)
 		tst_brk(TCONF, "%s", tst_test->tconf_msg);
 
diff --git a/runtest/syscalls-unstable b/runtest/syscalls-unstable
new file mode 100644
index 000000000..a87284afe
--- /dev/null
+++ b/runtest/syscalls-unstable
@@ -0,0 +1,3 @@
+# Tests for kernel features which are not finalized
+
+fanotify22 fanotify22
-- 
2.34.0