test: add macros to run fs tests with io_uring (#4963 1/2)

Added `TEST_FS_DECLARE`, `TEST_FS_ENTRY` and `TEST_FS_IMPL` so we can
run test-fs.c tests both using the threadpool and io_uring
implementations.

test/runner.h

@@ -68,6 +68,23 @@ typedef struct {
 #define TEST_ENTRY_CUSTOM(name, is_helper, show_output, timeout) \
     { #name, #name, &run_test_##name, is_helper, show_output, timeout },
 
+/*
+ * Macros for fs tests that, on linux, generate both normal and io_uring
+ * versions.
+ */
+#ifdef __linux__
+#define TEST_FS_DECLARE(name)                       \
+  TEST_DECLARE(name)                                \
+  TEST_DECLARE(name##_iouring)
+
+#define TEST_FS_ENTRY(name)                         \
+  TEST_ENTRY(name)                                  \
+  TEST_ENTRY(name##_iouring)
+#else
+#define TEST_FS_DECLARE(name) TEST_DECLARE(name)
+#define TEST_FS_ENTRY(name) TEST_ENTRY(name)
+#endif
+
 #define BENCHMARK_DECLARE(name)                     \
   int run_benchmark_##name(void);
 

test/task.h

@@ -284,6 +284,19 @@ typedef enum {
   int run_benchmark_##name(void);                                             \
   int run_benchmark_##name(void)
 
+#ifdef __linux__
+#define TEST_FS_IMPL(name)                                                    \
+  int run_test_##name(void);                                                  \
+  int run_test_##name##_iouring(void) {                                       \
+    uv_os_setenv("UV_USE_IO_URING", "1");                                     \
+    uv_loop_configure(uv_default_loop(), UV_LOOP_USE_IO_URING_SQPOLL);        \
+    return run_test_##name();                                                 \
+  }                                                                           \
+  int run_test_##name(void)
+#else
+#define TEST_FS_IMPL(name) TEST_IMPL(name)
+#endif
+
 #define HELPER_IMPL(name)                                                     \
   int run_helper_##name(void);                                                \
   int run_helper_##name(void)