Add circular eventfd test case

Signed-off-by: Jens Axboe <axboe@kernel.dk>

2 files changed, 96 insertions, 2 deletions

diff --git a/test/Makefile b/test/Makefile
index 4ee68d2..8cabbb0 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -19,7 +19,8 @@ all_targets += poll poll-cancel ring-leak fsync io_uring_setup io_uring_register
 		poll-many b5837bd5311d-test accept-test d77a67ed5f27-test \
 		connect 7ad0e4b2f83c-test submit-reuse fallocate open-close \
 		file-update statx accept-reuse poll-v-poll fadvise madvise \
-		short-read openat2 probe shared-wq personality eventfd send_recv
+		short-read openat2 probe shared-wq personality eventfd \
+		send_recv eventfd-ring
 
 include ../Makefile.quiet
 
@@ -46,7 +47,7 @@ test_srcs := poll.c poll-cancel.c ring-leak.c fsync.c io_uring_setup.c \
 	7ad0e4b2f83c-test.c submit-reuse.c fallocate.c open-close.c \
 	file-update.c statx.c accept-reuse.c poll-v-poll.c fadvise.c \
 	madvise.c short-read.c openat2.c probe.c shared-wq.c \
-	personality.c eventfd.c
+	personality.c eventfd.c eventfd-ring.c
 
 test_objs := $(patsubst %.c,%.ol,$(test_srcs))
 
diff --git a/test/eventfd-ring.c b/test/eventfd-ring.c
new file mode 100644
index 0000000..274da49
--- /dev/null
+++ b/test/eventfd-ring.c
@@ -0,0 +1,93 @@
+/*
+ * Description: run various nop tests
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/poll.h>
+#include <sys/eventfd.h>
+
+#include "liburing.h"
+
+int main(int argc, char *argv[])
+{
+	struct io_uring_params p = {};
+	struct io_uring ring1, ring2;
+	struct io_uring_sqe *sqe;
+	int ret, evfd1, evfd2;
+
+	ret = io_uring_queue_init_params(8, &ring1, &p);
+	if (ret) {
+		fprintf(stderr, "ring setup failed: %d\n", ret);
+		return 1;
+	}
+	if (!(p.features & IORING_FEAT_CUR_PERSONALITY)) {
+		fprintf(stdout, "Skipping\n");
+		return 0;
+	}
+	ret = io_uring_queue_init(8, &ring2, 0);
+	if (ret) {
+		fprintf(stderr, "ring setup failed: %d\n", ret);
+		return 1;
+	}
+
+	evfd1 = eventfd(0, EFD_CLOEXEC);
+	if (evfd1 < 0) {
+		perror("eventfd");
+		return 1;
+	}
+
+	evfd2 = eventfd(0, EFD_CLOEXEC);
+	if (evfd2 < 0) {
+		perror("eventfd");
+		return 1;
+	}
+
+	ret = io_uring_register_eventfd(&ring1, evfd1);
+	if (ret) {
+		fprintf(stderr, "failed to register evfd: %d\n", ret);
+		return 1;
+	}
+
+	ret = io_uring_register_eventfd(&ring2, evfd2);
+	if (ret) {
+		fprintf(stderr, "failed to register evfd: %d\n", ret);
+		return 1;
+	}
+
+	sqe = io_uring_get_sqe(&ring1);
+	io_uring_prep_poll_add(sqe, evfd2, POLLIN);
+	sqe->user_data = 1;
+
+	sqe = io_uring_get_sqe(&ring2);
+	io_uring_prep_poll_add(sqe, evfd1, POLLIN);
+	sqe->user_data = 1;
+
+	ret = io_uring_submit(&ring1);
+	if (ret != 1) {
+		fprintf(stderr, "submit: %d\n", ret);
+		return 1;
+	}
+
+	ret = io_uring_submit(&ring2);
+	if (ret != 1) {
+		fprintf(stderr, "submit: %d\n", ret);
+		return 1;
+	}
+
+	sqe = io_uring_get_sqe(&ring1);
+	io_uring_prep_nop(sqe);
+	sqe->user_data = 3;
+
+	ret = io_uring_submit(&ring1);
+	if (ret != 1) {
+		fprintf(stderr, "submit: %d\n", ret);
+		return 1;
+	}
+
+	return 0;
+}