vsock/test: add a final full barrier after run all tests

If the last test fails, the other side still completes correctly,
which could lead to false positives.

Let's add a final barrier that ensures that the last test has finished
correctly on both sides, but also that the two sides agree on the
number of tests to be performed.

Fixes: 2f65b44e199c ("VSOCK: add full barrier between test cases")
Reviewed-by: Luigi Leonardi <leonardi@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://patch.msgid.link/20260108114419.52747-1-sgarzare@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/vsock/util.c b/tools/testing/vsock/util.c
index d843643ced6b7fb06e75da5794dcf173f9d5ce66..9430ef5b8bc3ea1c0e15c4441ce336435282ec4a 100644 (file)
--- a/tools/testing/vsock/util.c
+++ b/tools/testing/vsock/util.c
@@ -511,6 +511,18 @@ void run_tests(const struct test_case *test_cases,
 
                printf("ok\n");
        }
+
+       printf("All tests have been executed. Waiting other peer...");
+       fflush(stdout);
+
+       /*
+        * Final full barrier, to ensure that all tests have been run and
+        * that even the last one has been successful on both sides.
+        */
+       control_writeln("COMPLETED");
+       control_expectln("COMPLETED");
+
+       printf("ok\n");
 }
 
 void list_tests(const struct test_case *test_cases)