[PATCH liburing v3 04/11] add a t_probe_defer_taskrun helper function for tests

[Dylan Yudaken <dylany@fb.com>]

Help tests to determine if they can use IORING_SETUP_DEFER_TASKRUN

Signed-off-by: Dylan Yudaken <dylany@fb.com>
---
 test/helpers.c | 17 +++++++++++++++--
 test/helpers.h |  2 ++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/test/helpers.c b/test/helpers.c
index 4d5c402f8fb2..8fb32b8fa982 100644
--- a/test/helpers.c
+++ b/test/helpers.c
@@ -75,7 +75,7 @@ static void __t_create_file(const char *file, size_t size, char pattern)
 {
 	ssize_t ret;
 	char *buf;
-	int fd; 
+	int fd;
 
 	buf = t_malloc(size);
 	memset(buf, pattern, size);
@@ -112,7 +112,7 @@ struct iovec *t_create_buffers(size_t buf_num, size_t buf_size)
 	vecs = t_malloc(buf_num * sizeof(struct iovec));
 	for (i = 0; i < buf_num; i++) {
 		t_posix_memalign(&vecs[i].iov_base, buf_size, buf_size);
-		vecs[i].iov_len = buf_size; 
+		vecs[i].iov_len = buf_size;
 	}
 	return vecs;
 }
@@ -253,3 +253,16 @@ errno_cleanup:
 	close(fd[1]);
 	return ret;
 }
+
+bool t_probe_defer_taskrun(void)
+{
+	struct io_uring ring;
+	int ret;
+
+	ret = io_uring_queue_init(1, &ring, IORING_SETUP_SINGLE_ISSUER |
+					    IORING_SETUP_DEFER_TASKRUN);
+	if (ret < 0)
+		return false;
+	io_uring_queue_exit(&ring);
+	return true;
+}
diff --git a/test/helpers.h b/test/helpers.h
index 9ad99472b288..5e9bb2613ab2 100644
--- a/test/helpers.h
+++ b/test/helpers.h
@@ -82,6 +82,8 @@ enum t_setup_ret t_register_buffers(struct io_uring *ring,
 				    const struct iovec *iovecs,
 				    unsigned nr_iovecs);
 
+bool t_probe_defer_taskrun(void);
+
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
 #ifdef __cplusplus
-- 
2.30.2