test/io_uring_passthrough: add test case for poll IO
For uring passthrough add test case for poll IO completion.
If poll IO is not supported return success.
Tested-by: Kanchan Joshi
Link:
#include "helpers.h"
#include "liburing.h"
+#include "../src/syscall.h"
#include "nvme.h"
#define FILE_SIZE (256 * 1024)
@@ -278,6 +279,75 @@ static int test_io(const char *file, int tc, int read, int sqthread,
return ret;
}
+extern int __io_uring_flush_sq(struct io_uring *ring);
+
+/*
+ * if we are polling io_uring_submit needs to always enter the
+ * kernel to fetch events
+ */
+static int test_io_uring_submit_enters(const char *file)
+{
+ struct io_uring ring;
+ int fd, i, ret, ring_flags, open_flags;
+ unsigned head;
+ struct io_uring_cqe *cqe;
+
+ ring_flags = IORING_SETUP_IOPOLL;
+ ring_flags |= IORING_SETUP_SQE128;
+ ring_flags |= IORING_SETUP_CQE32;
+
+ ret = io_uring_queue_init(64, &ring, ring_flags);
+ if (ret) {
+ fprintf(stderr, "ring create failed: %d\n", ret);
+ return 1;
+ }
+
+ open_flags = O_WRONLY;
+ fd = open(file, open_flags);
+ if (fd < 0) {
+ perror("file open");
+ goto err;
+ }
+
+ for (i = 0; i < BUFFERS; i++) {
+ struct io_uring_sqe *sqe;
+ off_t offset = BS * (rand() % BUFFERS);
+
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_writev(sqe, fd, &vecs[i], 1, offset);
+ sqe->user_data = 1;
+ }
+
+ /* submit manually to avoid adding IORING_ENTER_GETEVENTS */
+ ret = __sys_io_uring_enter(ring.ring_fd, __io_uring_flush_sq(&ring), 0,
+ 0, NULL);
+ if (ret < 0)
+ goto err;
+
+ for (i = 0; i < 500; i++) {
+ ret = io_uring_submit(&ring);
+ if (ret != 0) {
+ fprintf(stderr, "still had %d sqes to submit, this is unexpected", ret);
+ goto err;
+ }
+
+ io_uring_for_each_cqe(&ring, head, cqe) {
+ if (cqe->res == -EOPNOTSUPP)
+ fprintf(stdout, "Device doesn't support polled IO\n");
+ goto ok;
+ }
+ usleep(10000);
+ }
+err:
+ ret = 1;
+ if (fd != -1)
+ close(fd);
+
+ok:
+ io_uring_queue_exit(&ring);
+ return ret;
+}
+
int main(int argc, char *argv[])
{
int i, ret;
@@ -308,6 +378,12 @@ int main(int argc, char *argv[])
}
}
+ ret = test_io_uring_submit_enters(fname);
+ if (ret) {
+ fprintf(stderr, "test_io_uring_submit_enters failed\n");
+ goto err;
+ }
+
return T_EXIT_PASS;
err:
return T_EXIT_FAIL;
