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Message-ID: <20070919082924.14ca2c1b@freepuppy.rosehill.hemminger.net>
Date: Wed, 19 Sep 2007 08:29:24 -0700
From: Stephen Hemminger <shemminger@...ux-foundation.org>
To: Varun Chandramohan <varunc@...ux.vnet.ibm.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, kaber@...sh.net,
socketcan@...tkopp.net, krkumar2@...ibm.com, tgraf@...g.ch,
varuncha@...ibm.com
Subject: Re: [RESEND][PATCH 2/4 Rev-3] Add new timeval_to_sec function
On Wed, 19 Sep 2007 09:24:07 +0530
Varun Chandramohan <varunc@...ux.vnet.ibm.com> wrote:
> A new function for converting timeval to time_t is added in netlink.h. Its a common function used in differentplaces. The reason for adding this function in netlink.h is that its used by netlink for stats purpose.
>
> Signed-off-by: Varun Chandramohan <varunc@...ux.vnet.ibm.com>
> ---
> include/net/netlink.h | 13 +++++++++++++
> 1 files changed, 13 insertions(+), 0 deletions(-)
>
> diff --git a/include/net/netlink.h b/include/net/netlink.h
> index d7b824b..f86cc59 100644
> --- a/include/net/netlink.h
> +++ b/include/net/netlink.h
> @@ -1100,4 +1100,17 @@ static inline int nla_validate_nested(st
> #define nla_for_each_nested(pos, nla, rem) \
> nla_for_each_attr(pos, nla_data(nla), nla_len(nla), rem)
>
> +/**
> + * timeval_to_sec - Convert timeval to seconds
> + * @tv: pointer to the timeval variable to be converted
> + *
> + * Returns the seconds representation of timeval parameter.
> + * Note : Here we round up the value. We dont need accuracy.
> + * This is mainly used in netlink for stats purpose.
> + */
> +static inline time_t timeval_to_sec(const struct timeval *tv)
> +{
> + return (tv->tv_sec + (tv->tv_usec ? 1 : 0));
> +}
> +
> #endif
1. If needed it belongs in include/linux/time.h
2. You never adequately explained why the function rounds up? No other
statistical or time interface does rounding, why should this API round
and others do not?
--
Stephen Hemminger <shemminger@...ux-foundation.org>
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