It's not currently possible but in the future we may get
IORING_CQE_F_MORE and so a notification even for a failed request, i.e.
when cqe->res <= 0. That's precisely what the documentation says, so
adjust the test and do IORING_CQE_F_MORE checks regardless of the main
completion cqe->res.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
.../selftests/net/io_uring_zerocopy_tx.c | 22 +++++++++++--------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/net/io_uring_zerocopy_tx.c b/tools/testing/selftests/net/io_uring_zerocopy_tx.c
index 8ce48aca8321..154287740172 100644
--- a/tools/testing/selftests/net/io_uring_zerocopy_tx.c
+++ b/tools/testing/selftests/net/io_uring_zerocopy_tx.c
@@ -400,7 +400,6 @@ static void do_tx(int domain, int type, int protocol)
cfg_payload_len, msg_flags);
sqe->user_data = NONZC_TAG;
} else {
- compl_cqes++;
io_uring_prep_sendzc(sqe, fd, payload,
cfg_payload_len,
msg_flags, zc_flags);
@@ -430,18 +429,23 @@ static void do_tx(int domain, int type, int protocol)
if (cqe->flags & IORING_CQE_F_NOTIF) {
if (cqe->flags & IORING_CQE_F_MORE)
error(1, -EINVAL, "invalid notif flags");
+ if (compl_cqes <= 0)
+ error(1, -EINVAL, "notification mismatch");
compl_cqes--;
i--;
- } else if (cqe->res <= 0) {
- if (cqe->flags & IORING_CQE_F_MORE)
- error(1, cqe->res, "more with a failed send");
- error(1, cqe->res, "send failed");
- } else {
- if (cqe->user_data == ZC_TAG &&
- !(cqe->flags & IORING_CQE_F_MORE))
- error(1, cqe->res, "missing more flag");
+ io_uring_cqe_seen(&ring);
+ continue;
+ }
+ if (cqe->flags & IORING_CQE_F_MORE) {
+ if (cqe->user_data != ZC_TAG)
+ error(1, cqe->res, "unexpected F_MORE");
+ compl_cqes++;
+ }
+ if (cqe->res >= 0) {
packets++;
bytes += cqe->res;
+ } else if (cqe->res != -EAGAIN) {
+ error(1, cqe->res, "send failed");
}
io_uring_cqe_seen(&ring);
}
--
2.37.2
