Add test case for poll hang

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

2 files changed, 93 insertions, 2 deletions

diff --git a/test/500f9fbadef8-test.c b/test/500f9fbadef8-test.c
new file mode 100644
index 0000000..88602ad
--- /dev/null
+++ b/test/500f9fbadef8-test.c
@@ -0,0 +1,88 @@
+/*
+ * Description: Single depth submit+wait poll hang test
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "liburing.h"
+
+#define BLOCKS	4096
+
+int main(int argc, char *argv[])
+{
+	struct io_uring ring;
+	struct io_uring_sqe *sqe;
+	struct io_uring_cqe *cqe;
+	struct iovec iov;
+	char buf[32];
+	off_t offset;
+	unsigned blocks;
+	int ret, fd;
+
+	if (posix_memalign(&iov.iov_base, 4096, 4096)) {
+		fprintf(stderr, "memalign failed\n");
+		return 1;
+	}
+	iov.iov_len = 4096;
+
+	ret = io_uring_queue_init(1, &ring, IORING_SETUP_IOPOLL);
+	if (ret) {
+		fprintf(stderr, "ring setup failed\n");
+		return 1;
+
+	}
+
+	sprintf(buf, "./XXXXXX");
+	mktemp(buf);
+	fd = open(buf, O_WRONLY | O_DIRECT | O_CREAT, 0644);
+	if (fd < 0) {
+		perror("mkstemp");
+		return 1;
+	}
+
+	offset = 0;
+	blocks = BLOCKS;
+	do {
+		sqe = io_uring_get_sqe(&ring);
+		if (!sqe) {
+			fprintf(stderr, "get sqe failed\n");
+			goto err;
+		}
+		io_uring_prep_writev(sqe, fd, &iov, 1, offset);
+		ret = io_uring_submit_and_wait(&ring, 1);
+		if (ret < 0) {
+			fprintf(stderr, "submit_and_wait: %d\n", ret);
+			goto err;
+		}
+		ret = io_uring_wait_cqe(&ring, &cqe);
+		if (ret < 0) {
+			fprintf(stderr, "wait completion: %d\n", ret);
+			goto err;
+		}
+		if (cqe->res != 4096) {
+			if (cqe->res == -EOPNOTSUPP)
+				goto skipped;
+			goto err;
+		}
+		io_uring_cqe_seen(&ring, cqe);
+		offset += 4096;
+	} while (--blocks);
+		
+	close(fd);
+	unlink(buf);
+	return 0;
+err:
+	close(fd);
+	unlink(buf);
+	return 1;
+skipped:
+	fprintf(stderr, "Polling not supported in current dir, test skipped\n");
+	close(fd);
+	unlink(buf);
+	return 0;
+}
diff --git a/test/Makefile b/test/Makefile
index 4d056f8..2770219 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -4,14 +4,15 @@ override CFLAGS += -Wall -D_GNU_SOURCE -L../src/ -I../src/include/
 all_targets += poll poll-cancel ring-leak fsync io_uring_setup io_uring_register \
 	       io_uring_enter nop sq-full cq-full 35fa71a030ca-test \
 		917257daa0fe-test b19062a56726-test eeed8b54e0df-test link \
-		send_recvmsg a4c0b3decb33-test
+		send_recvmsg a4c0b3decb33-test 500f9fbadef8-test
 
 all: $(all_targets)
 
 test_srcs := poll.c poll-cancel.c ring-leak.c fsync.c io_uring_setup.c \
 	io_uring_register.c io_uring_enter.c nop.c sq-full.c cq-full.c \
 	35fa71a030ca-test.c 917257daa0fe-test.c b19062a56726-test.c \
-	eeed8b54e0df-test.c link.c send_recvmsg.c a4c0b3decb33-test.c
+	eeed8b54e0df-test.c link.c send_recvmsg.c a4c0b3decb33-test.c \
+	500f9fbadef8-test.c
 
 test_objs := $(patsubst %.c,%.ol,$(test_srcs))
 
@@ -49,6 +50,8 @@ send_recvmsg: send_recvmsg.c
 	$(CC) $(CFLAGS) -o $@ send_recvmsg.c -luring
 a4c0b3decb33-test: a4c0b3decb33-test.c
 	$(CC) $(CFLAGS) -o $@ a4c0b3decb33-test.c -luring
+500f9fbadef8-test: 500f9fbadef8-test.c
+	$(CC) $(CFLAGS) -o $@ 500f9fbadef8-test.c -luring
 
 clean:
 	rm -f $(all_targets) $(test_objs)