tst_test: Add test variants

The test variants are intended for running the test more than once for a
different settings. The indended purpose is to run tests for both libc
wrapper and raw syscall as well as for different syscall variants.

The commit itself adds a test_variant integer that, if set, denotes
number of test variants. The test is then forked and executed
test_variant times each time with different value in global tst_variant
variable.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
Reviewed-by: Steve Muckle <smuckle@google.com>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Acked-by: Jan Stancek <jstancek@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/tst_test.h b/include/tst_test.h
index da41f776d..cf2447fe3 100644
--- a/include/tst_test.h
+++ b/include/tst_test.h
@@ -114,6 +114,8 @@ int tst_parse_int(const char *str, int *val, int min, int max);
 int tst_parse_long(const char *str, long *val, long min, long max);
 int tst_parse_float(const char *str, float *val, float min, float max);
 
+extern unsigned int tst_variant;
+
 struct tst_test {
 	/* number of tests available in test() function */
 	unsigned int tcnt;
@@ -146,6 +148,16 @@ struct tst_test {
 	 */
 	int all_filesystems:1;
 
+	/*
+	 * If set non-zero denotes number of test variant, the test is executed
+	 * variants times each time with tst_variant set to different number.
+	 *
+	 * This allows us to run the same test for different settings. The
+	 * intended use is to test different syscall wrappers/variants but the
+	 * API is generic and does not limit the usage in any way.
+	 */
+	unsigned int test_variants;
+
 	/* Minimal device size in megabytes */
 	unsigned int dev_min_size;