[v2,0/2] io_uring zc rx fixed len recvzc

Message

David Wei Feb. 21, 2025, 8:51 p.m. UTC

Currently only multishot recvzc requests are supported in io_uring zc
rx, but sometimes there is a need to do a single recvzc e.g. peeking at
some data in the socket.

In this series, add single shot recvzc request and a selftest for the
feature.

Changes in v2:
--------------
* Consistently use u32/unsigned int for len
* Remove nowait semantics, request will not complete until requested len
  has been received
* Always set REQ_F_APOLL_MULTISHOT
* Fix return codes from io_recvzc request
* Fix changing len if set to UINT_MAX in io_zcrx_recv_skb()
* Use read_desc->count

David Wei (2):
  io_uring/zcrx: add single shot recvzc
  io_uring/zcrx: add selftest case for single shot recvzc

 io_uring/net.c                                | 19 +++++++-
 io_uring/zcrx.c                               | 17 +++++---
 io_uring/zcrx.h                               |  2 +-
 .../selftests/drivers/net/hw/iou-zcrx.c       | 43 ++++++++++++++++---
 .../selftests/drivers/net/hw/iou-zcrx.py      | 27 +++++++++++-
 5 files changed, 92 insertions(+), 16 deletions(-)