| From: |
| Damian Hobson-Garcia <dhobsong@igel.co.jp> |
| To: |
| viro@zeniv.linux.org.uk, sustrik@250bpm.com |
| Subject: |
| [PATCH v3 0/1] Generalize poll events from eventfd |
| Date: |
| Thu, 15 Oct 2015 10:42:07 +0900 |
| Message-ID: |
| <1444873328-8466-1-git-send-email-dhobsong@igel.co.jp> |
| Cc: |
| linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, netdev@vger.kernel.org, David.Laight@aculab.com, Damian Hobson-Garcia <dhobsong@igel.co.jp> |
| Archive‑link: | |
Article |
Using eventfd user space can generate POLLIN/POLLOUT events but some
applications may want to generate POLLPRI/POLLERR events as well.
This patch submission aims to generalize the events generated by an
eventfd. This is a resubmission of a patch from Feb 2013[1]. The original
discussion trailed off without any conclusion, but the original author
has recently confirmed[2] that this functionality is still useful, so I
volunteered to rebase and resubmit the patch for discussion.
[1] https://lkml.org/lkml/2013/2/18/147
[2] https://lkml.org/lkml/2015/7/9/153
Changes in v3
-------------
* replace efd_mask structure with scalar 'events' variable.
Changes in v2
-------------
* rebased on Linux v4.3-rc1
* Move file operation implementations for EFD_MASK to a seperate structure
* Remove 'data' element from efd_mask structure
* read() is no longer supported when EFD_MASK is set (fails with EINVAL)
* eventfd_ctx_fileget() now returns EINVAL when EFD_MASK is set, eliminating
the possibility of triggering the orginal BUG_ON() macros which have now
been removed.
Thank you,
Damian
Martin Sustrik (1):
eventfd: implementation of EFD_MASK flag
fs/eventfd.c | 91 ++++++++++++++++++++++++++++++++++++++------
include/linux/eventfd.h | 16 +-------
include/uapi/linux/eventfd.h | 40 +++++++++++++++++++
3 files changed, 121 insertions(+), 26 deletions(-)
create mode 100644 include/uapi/linux/eventfd.h
--
1.9.1
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