linux-kernel - Re: [PATCH] timerfd: expose uapi header

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Date:	Mon, 05 Oct 2015 16:57:53 +0200
From:	Yann Droneaud <ydroneaud@...eya.com>
To:	Gabriel Laskar <gabriel@....epita.fr>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>,
	Hans Verkuil <hans.verkuil@...co.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	stephen hemminger <stephen@...workplumber.org>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Masahiro Yamada <yamada.m@...panasonic.com>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>
Subject: Re: [PATCH] timerfd: expose uapi header

Hi,

Le lundi 05 octobre 2015 à 16:53 +0200, Gabriel Laskar a écrit :
> this patch expose the timerfd apis to the userland. It is already in
> glibc header sys/timerfd.h but not synchronised, and missing the
> ioctl
> number definition.
> 
> Signed-off-by: Gabriel Laskar <gabriel@....epita.fr>
> ---
>  include/linux/timerfd.h      | 20 +-------------------
>  include/uapi/linux/Kbuild    |  1 +
>  include/uapi/linux/timerfd.h | 31 +++++++++++++++++++++++++++++++
>  3 files changed, 33 insertions(+), 19 deletions(-)
>  create mode 100644 include/uapi/linux/timerfd.h
> 
> diff --git a/include/linux/timerfd.h b/include/linux/timerfd.h
> index bd36ce4..bab0b1a 100644
> --- a/include/linux/timerfd.h
> +++ b/include/linux/timerfd.h
> @@ -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 */
> diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
> index f7b2db4..874ac3f 100644
> --- a/include/uapi/linux/Kbuild
> +++ b/include/uapi/linux/Kbuild
> @@ -395,6 +395,7 @@ header-y += tcp_metrics.h
>  header-y += telephony.h
>  header-y += termios.h
>  header-y += thermal.h
> +header-y += tiemrfd.h

Typo here ...

That should have been caught with make headers_install

>  header-y += time.h
>  header-y += times.h
>  header-y += timex.h
> diff --git a/include/uapi/linux/timerfd.h
> b/include/uapi/linux/timerfd.h
> new file mode 100644
> index 0000000..69a2f92
> --- /dev/null
> +++ b/include/uapi/linux/timerfd.h
> @@ -0,0 +1,31 @@
> +/*
> + *  include/uapi/linux/timerfd.h
> + *
> + *  Copyright (C) 2007  Davide Libenzi <davidel@...ilserver.org>
> + *
> + */
> +
> +#ifndef _UAPI_LINUX_TIMERFD_H
> +#define _UAPI_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
> +
> +#define TFD_IOC_SET_TICKS	_IOW('T', 0, u64)
> +
> +#endif /* _UAPI_LINUX_TIMERFD_H */


Regards.

-- 
Yann Droneaud
OPTEYA

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