iotests: always use a unique sub-directory per test

The current test runner is only safe against parallel execution within
a single instance of the 'check' process, and only if -j is given a
value greater than 2. This prevents running multiple copies of the
'check' process for different test scenarios.

This change switches the output / socket directories to always include
the test name, image format and image protocol. This should allow full
parallelism of all distinct test scenarios. eg running both qcow2 and
raw tests at the same time, or both file and nbd tests at the same
time.

It would be possible to allow for parallelism of the same test scenario
by including the pid, but that would potentially let many directories
accumulate over time on failures, so is not done.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Hanna Czenczek <hreitz@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230303160727.3977246-7-berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230315174331.2959-24-alex.bennee@linaro.org>

diff --git a/tests/qemu-iotests/testrunner.py b/tests/qemu-iotests/testrunner.py
index 81519ed6e2ed83de0cffce5169479e3463f14d17..7b322272e9208e17b4d96d98bff4f2bddbe67997 100644 (file)
--- a/tests/qemu-iotests/testrunner.py
+++ b/tests/qemu-iotests/testrunner.py
@@ -228,13 +228,11 @@ class TestRunner(ContextManager['TestRunner']):
 
         return f'{test}.out'
 
-    def do_run_test(self, test: str, mp: bool) -> TestResult:
+    def do_run_test(self, test: str) -> TestResult:
         """
         Run one test
 
         :param test: test file path
-        :param mp: if true, we are in a multiprocessing environment, use
-                   personal subdirectories for test run
 
         Note: this method may be called from subprocess, so it does not
         change ``self`` object in any way!
@@ -257,12 +255,14 @@ class TestRunner(ContextManager['TestRunner']):
 
         args = [str(f_test.resolve())]
         env = self.env.prepare_subprocess(args)
-        if mp:
-            # Split test directories, so that tests running in parallel don't
-            # break each other.
-            for d in ['TEST_DIR', 'SOCK_DIR']:
-                env[d] = os.path.join(env[d], f_test.name)
-                Path(env[d]).mkdir(parents=True, exist_ok=True)
+
+        # Split test directories, so that tests running in parallel don't
+        # break each other.
+        for d in ['TEST_DIR', 'SOCK_DIR']:
+            env[d] = os.path.join(
+                env[d],
+                f"{self.env.imgfmt}-{self.env.imgproto}-{f_test.name}")
+            Path(env[d]).mkdir(parents=True, exist_ok=True)
 
         test_dir = env['TEST_DIR']
         f_bad = Path(test_dir, f_test.name + '.out.bad')
@@ -347,7 +347,7 @@ class TestRunner(ContextManager['TestRunner']):
             testname = os.path.basename(test)
             print(f'# running {self.env.imgfmt} {testname}')
 
-        res = self.do_run_test(test, mp)
+        res = self.do_run_test(test)
 
         end = datetime.datetime.now().strftime('%H:%M:%S')
         self.test_print_one_line(test=test,