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timerfd: export defines to userspace 

Since userspace is expected to call timerfd syscalls directly with these
flags/ioctls, make sure we export them so they don't have to duplicate
the values themselves.

Link: http://lkml.kernel.org/r/20161219064052.7196-1-vapier@gentoo.org
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger 2017-01-10 16:58:30 -08:00 committed by Linus Torvalds
parent e5bbc8a6c9
commit 575b1967e1
3 changed files with 38 additions and 19 deletions
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20
include/linux/timerfd.h
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@ -8,23 +8,7 @@
#ifndef _LINUX_TIMERFD_H
#define _LINUX_TIMERFD_H
/* For O_CLOEXEC and O_NONBLOCK */
#include <linux/fcntl.h>
/* For _IO helpers */
#include <linux/ioctl.h>
/*
* CAREFUL: Check include/asm-generic/fcntl.h when defining
* new flags, since they might collide with O_* ones. We want
* to re-use O_* flags that couldn't possibly have a meaning
* from eventfd, in order to leave a free define-space for
* shared O_* flags.
*/
#define TFD_TIMER_ABSTIME (1 << 0)
#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
#define TFD_CLOEXEC O_CLOEXEC
#define TFD_NONBLOCK O_NONBLOCK
#include <uapi/linux/timerfd.h>
#define TFD_SHARED_FCNTL_FLAGS (TFD_CLOEXEC | TFD_NONBLOCK)
/* Flags for timerfd_create. */
@ -32,6 +16,4 @@
/* Flags for timerfd_settime. */
#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)
#define TFD_IOC_SET_TICKS _IOW('T', 0, u64)
#endif /* _LINUX_TIMERFD_H */

1
include/uapi/linux/Kbuild
View File

@ -414,6 +414,7 @@ header-y += telephony.h
header-y += termios.h
header-y += thermal.h
header-y += time.h
header-y += timerfd.h
header-y += times.h
header-y += timex.h
header-y += tiocl.h

36
include/uapi/linux/timerfd.h Normal file
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@ -0,0 +1,36 @@
/*
* include/linux/timerfd.h
*
* Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
*
*/
#ifndef _UAPI_LINUX_TIMERFD_H
#define _UAPI_LINUX_TIMERFD_H
#include <linux/types.h>
/* For O_CLOEXEC and O_NONBLOCK */
#include <linux/fcntl.h>
/* For _IO helpers */
#include <linux/ioctl.h>
/*
* CAREFUL: Check include/asm-generic/fcntl.h when defining
* new flags, since they might collide with O_* ones. We want
* to re-use O_* flags that couldn't possibly have a meaning
* from eventfd, in order to leave a free define-space for
* shared O_* flags.
*
* Also make sure to update the masks in include/linux/timerfd.h
* when adding new flags.
*/
#define TFD_TIMER_ABSTIME (1 << 0)
#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
#define TFD_CLOEXEC O_CLOEXEC
#define TFD_NONBLOCK O_NONBLOCK
#define TFD_IOC_SET_TICKS _IOW('T', 0, __u64)
#endif /* _UAPI_LINUX_TIMERFD_H */