linux-kernel - [PATCH liburing v2 0/5] liburing: add helpers to enable/disable eventfd notifications

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Message-Id: <20200520170714.68156-1-sgarzare@redhat.com>
Date:   Wed, 20 May 2020 19:07:09 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-kernel@...r.kernel.org, io-uring@...r.kernel.org
Subject: [PATCH liburing v2 0/5] liburing: add helpers to enable/disable
 eventfd notifications

This series is based on top of a new IORING_CQ_EVENTFD_DISABLED
flag available in the CQ ring flags.

I added io_uring_cq_eventfd_enabled() to get the status of eventfd
notifications, and io_uring_cq_eventfd_toggle() to disable/enabled
eventfd notifications.

I updated man pages and I added a eventfd-disable.c test case.

v1 -> v2:
  - renamed io_uring_cq_eventfd_toggle()
  - return EOPNOTSUPP only if we need to change the flag

Stefano Garzarella (5):
  Add CQ ring 'flags' field
  man/io_uring_setup.2: add 'flags' field in the struct
    io_cqring_offsets
  Add helpers to set and get eventfd notification status
  man/io_uring_register.2: add IORING_CQ_EVENTFD_DISABLED description
  Add test/eventfd-disable.c test case

 .gitignore                      |   1 +
 man/io_uring_register.2         |   8 ++
 man/io_uring_setup.2            |   3 +-
 src/include/liburing.h          |  34 ++++++++
 src/include/liburing/io_uring.h |  11 ++-
 src/setup.c                     |   2 +
 test/Makefile                   |   6 +-
 test/eventfd-disable.c          | 148 ++++++++++++++++++++++++++++++++
 8 files changed, 209 insertions(+), 4 deletions(-)
 create mode 100644 test/eventfd-disable.c

-- 
2.25.4