Just call it and check that it doesn't hang and returns success.

Signed-off-by: Pavel Begunkov <asml.sile...@gmail.com>
---
 test/fsync.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/test/fsync.c b/test/fsync.c
index 839716a..ee60e0f 100644
--- a/test/fsync.c
+++ b/test/fsync.c
@@ -135,6 +135,79 @@ err:
        return 1;
 }
 
+#define FILE_SIZE 1024
+
+static int create_file(const char *file)
+{
+       ssize_t ret;
+       char *buf;
+       int fd;
+
+       buf = malloc(FILE_SIZE);
+       memset(buf, 0xaa, FILE_SIZE);
+
+       fd = open(file, O_WRONLY | O_CREAT, 0644);
+       if (fd < 0) {
+               perror("open file");
+               return 1;
+       }
+       ret = write(fd, buf, FILE_SIZE);
+       close(fd);
+       return ret != FILE_SIZE;
+}
+
+static int test_sync_file_range(struct io_uring *ring)
+{
+       int ret, fd, save_errno;
+       struct io_uring_sqe *sqe;
+       struct io_uring_cqe *cqe;
+
+       if (create_file(".sync_file_range")) {
+               fprintf(stderr, "file creation failed\n");
+               return 1;
+       }
+
+       fd = open(".sync_file_range", O_RDWR);
+       save_errno = errno;
+       unlink(".sync_file_range");
+       errno = save_errno;
+       if (fd < 0) {
+               perror("file open");
+               return 1;
+       }
+
+       sqe = io_uring_get_sqe(ring);
+       if (!sqe) {
+               fprintf(stderr, "sqe get failed\n");
+               return 1;
+       }
+       memset(sqe, 0, sizeof(*sqe));
+       sqe->opcode = IORING_OP_SYNC_FILE_RANGE;
+       sqe->off = 0;
+       sqe->len = 0;
+       sqe->sync_range_flags = 0;
+       sqe->user_data = 1;
+       sqe->fd = fd;
+
+       ret = io_uring_submit(ring);
+       if (ret != 1) {
+               fprintf(stderr, "submit failed: %d\n", ret);
+               return 1;
+       }
+       ret = io_uring_wait_cqe(ring, &cqe);
+       if (ret) {
+               fprintf(stderr, "wait_cqe failed: %d\n", ret);
+               return 1;
+       }
+       if (cqe->res) {
+               fprintf(stderr, "sfr failed: %d\n", cqe->res);
+               return 1;
+       }
+
+       io_uring_cqe_seen(ring, cqe);
+       return 0;
+}
+
 int main(int argc, char *argv[])
 {
        struct io_uring ring;
@@ -159,5 +232,11 @@ int main(int argc, char *argv[])
                return ret;
        }
 
+       ret = test_sync_file_range(&ring);
+       if (ret) {
+               fprintf(stderr, "test_sync_file_range failed\n");
+               return ret;
+       }
+
        return 0;
 }
-- 
2.24.0

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