splice/tee/tests: test len=0 splice/tee
Check zero-length splice() and tee().
@@ -144,7 +144,7 @@ static int do_splice_op(struct io_uring *ring,
struct io_uring_sqe *sqe;
int ret = -1;
- while (len) {
+ do {
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
@@ -179,7 +179,7 @@ static int do_splice_op(struct io_uring *ring,
if (off_out != -1)
off_out += cqe->res;
io_uring_cqe_seen(ring, cqe);
- }
+ } while (len);
return 0;
}
@@ -215,6 +215,21 @@ static void check_tee_support(struct io_uring *ring, struct test_ctx *ctx)
has_tee = (ret == -EBADF);
}
+static int check_zero_splice(struct io_uring *ring, struct test_ctx *ctx)
+{
+ int ret;
+
+ ret = do_splice(ring, ctx->fd_in, -1, ctx->pipe1[1], -1, 0);
+ if (ret)
+ return ret;
+
+ ret = do_splice(ring, ctx->pipe2[0], -1, ctx->pipe1[1], -1, 0);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
static int splice_to_pipe(struct io_uring *ring, struct test_ctx *ctx)
{
int ret;
@@ -349,11 +364,23 @@ static int check_tee(struct io_uring *ring, struct test_ctx *ctx)
return 0;
}
+static int check_zero_tee(struct io_uring *ring, struct test_ctx *ctx)
+{
+ return do_tee(ring, ctx->pipe2[0], ctx->pipe1[1], 0);
+}
+
static int test_splice(struct io_uring *ring, struct test_ctx *ctx)
{
int ret;
if (has_splice) {
+ ret = check_zero_splice(ring, ctx);
+ if (ret) {
+ fprintf(stderr, "check_zero_splice failed %i %i\n",
+ ret, errno);
+ return ret;
+ }
+
ret = splice_to_pipe(ring, ctx);
if (ret) {
fprintf(stderr, "splice_to_pipe failed %i %i\n",
@@ -384,6 +411,13 @@ static int test_splice(struct io_uring *ring, struct test_ctx *ctx)
}
if (has_tee) {
+ ret = check_zero_tee(ring, ctx);
+ if (ret) {
+ fprintf(stderr, "check_zero_tee() failed %i %i\n",
+ ret, errno);
+ return ret;
+ }
+
ret = fail_tee_nonpipe(ring, ctx);
if (ret) {
fprintf(stderr, "fail_tee_nonpipe() failed %i %i\n",
