kernel/linux.git/io_uring/net.h, branch v6.6.132

io_uring: Add KASAN support for alloc_caches

2023-04-03T13:16:14+00:00

Add support for KASAN in the alloc_caches (apoll and netmsg_cache). Thus, if something touches the unused caches, it will raise a KASAN warning/exception. It poisons the object when the object is put to the cache, and unpoisons it when the object is gotten or freed. Signed-off-by: Breno Leitao Reviewed-by: Gabriel Krisman Bertazi Link: https://lore.kernel.org/r/20230223164353.2839177-2-leitao@debian.org Signed-off-by: Jens Axboe

io_uring/net: zerocopy sendmsg

2022-09-21T19:15:02+00:00

Add a zerocopy version of sendmsg. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/6aabc4bdfc0ec78df6ec9328137e394af9d4e7ef.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: combine fail handlers

2022-09-21T19:15:02+00:00

Merge io_send_zc_fail() into io_sendrecv_fail(), saves a few lines of code and some headache for following patch. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/e0eba1d577413aef5602cd45f588b9230207082d.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: rename io_sendzc()

2022-09-21T19:15:02+00:00

Simple renaming of io_sendzc*() functions in preparatio to adding a zerocopy sendmsg variant. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/265af46829e6076dd220011b1858dc3151969226.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: support non-zerocopy sendto

2022-09-21T19:15:02+00:00

We have normal sends, but what is missing is sendto-like requests. Add sendto() capabilities to IORING_OP_SEND by passing in addr just as we do for IORING_OP_SEND_ZC. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/69fbd8b2cb830e57d1bf9ec351e9bf95c5b77e3f.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: don't lose partial send_zc on fail

2022-09-21T19:15:02+00:00

Partial zc send may end up in io_req_complete_failed(), which not only would return invalid result but also mask out the notification leading to lifetime issues. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/5673285b5e83e6ceca323727b4ddaa584b5cc91e.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: don't lose partial send/recv on fail

2022-09-21T19:15:02+00:00

Just as with rw, partial send/recv may end up in io_req_complete_failed() and loose the result, make sure we return the number of bytes processed. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/a4ff95897b5419356fca9ea55db91ac15b2975f9.1663668091.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: simplify zerocopy send user API

2022-09-01T15:13:33+00:00

Following user feedback, this patch simplifies zerocopy send API. One of the main complaints is that the current API is difficult with the userspace managing notification slots, and then send retries with error handling make it even worse. Instead of keeping notification slots change it to the per-request notifications model, which posts both completion and notification CQEs for each request when any data has been sent, and only one CQE if it fails. All notification CQEs will have IORING_CQE_F_NOTIF set and IORING_CQE_F_MORE in completion CQEs indicates whether to wait a notification or not. IOSQE_CQE_SKIP_SUCCESS is disallowed with zerocopy sends for now. This is less flexible, but greatly simplifies the user API and also the kernel implementation. We reuse notif helpers in this patch, but in the future there won't be need for keeping two requests. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/95287640ab98fc9417370afb16e310677c63e6ce.1662027856.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/net: save address for sendzc async execution

2022-08-25T13:52:30+00:00

We usually copy all bits that a request needs from the userspace for async execution, so the userspace can keep them on the stack. However, send zerocopy violates this pattern for addresses and may reloads it e.g. from io-wq. Save the address if any in ->async_data as usual. Reported-by: Stefan Metzmacher Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/d7512d7aa9abcd36e9afe1a4d292a24cb2d157e5.1661342812.git.asml.silence@gmail.com [axboe: fold in incremental fix] Signed-off-by: Jens Axboe

io_uring: wire send zc request type

2022-07-25T00:41:07+00:00

Add a new io_uring opcode IORING_OP_SENDZC. The main distinction from IORING_OP_SEND is that the user should specify a notification slot index in sqe::notification_idx and the buffers are safe to reuse only when the used notification is flushed and completes. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/a80387c6a68ce9cf99b3b6ef6f71068468761fb7.1657643355.git.asml.silence@gmail.com Signed-off-by: Jens Axboe