netdev - Re: [PATCHv3 net-next] net: use jiffies_to_msecs to replace EXPIRES_IN_MS in inet/sctp

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Date:	Tue, 19 Apr 2016 08:59:31 -0300
From:	Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:	Xin Long <lucien.xin@...il.com>
Cc:	network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org,
	Vlad Yasevich <vyasevich@...il.com>, daniel@...earbox.net,
	davem@...emloft.net, eric.dumazet@...il.com, jsitnick@...hat.com
Subject: Re: [PATCHv3 net-next] net: use jiffies_to_msecs to replace
 EXPIRES_IN_MS in inet/sctp_diag

Re $tags, this is actually the 1st version of the patch, not the 3rd.

On Tue, Apr 19, 2016 at 03:10:01PM +0800, Xin Long wrote:
> EXPIRES_IN_MS macro comes from net/ipv4/inet_diag.c and dates
> back to before jiffies_to_msecs() has been introduced.
> 
> Now we can remove it and use jiffies_to_msecs().
> 
> Signed-off-by: Xin Long <lucien.xin@...il.com>
> ---
>  net/ipv4/inet_diag.c | 12 ++++++------
>  net/sctp/sctp_diag.c |  6 ++----
>  2 files changed, 8 insertions(+), 10 deletions(-)
> 
> diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
> index 70212bd..ad7956f 100644
> --- a/net/ipv4/inet_diag.c
> +++ b/net/ipv4/inet_diag.c
> @@ -197,27 +197,27 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
>  		goto out;
>  	}
>  
> -#define EXPIRES_IN_MS(tmo)  DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
> -
>  	if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
>  	    icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
>  	    icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
>  		r->idiag_timer = 1;
>  		r->idiag_retrans = icsk->icsk_retransmits;
> -		r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
> +		r->idiag_expires =
> +			jiffies_to_msecs(icsk->icsk_timeout - jiffies);
>  	} else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
>  		r->idiag_timer = 4;
>  		r->idiag_retrans = icsk->icsk_probes_out;
> -		r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
> +		r->idiag_expires =
> +			jiffies_to_msecs(icsk->icsk_timeout - jiffies);
>  	} else if (timer_pending(&sk->sk_timer)) {
>  		r->idiag_timer = 2;
>  		r->idiag_retrans = icsk->icsk_probes_out;
> -		r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
> +		r->idiag_expires =
> +			jiffies_to_msecs(sk->sk_timer.expires - jiffies);
>  	} else {
>  		r->idiag_timer = 0;
>  		r->idiag_expires = 0;
>  	}
> -#undef EXPIRES_IN_MS
>  
>  	if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
>  		attr = nla_reserve(skb, INET_DIAG_INFO,
> diff --git a/net/sctp/sctp_diag.c b/net/sctp/sctp_diag.c
> index 98ecd16..bb2d8d9 100644
> --- a/net/sctp/sctp_diag.c
> +++ b/net/sctp/sctp_diag.c
> @@ -48,10 +48,8 @@ static void inet_diag_msg_sctpasoc_fill(struct inet_diag_msg *r,
>  	r->idiag_state = asoc->state;
>  	r->idiag_timer = SCTP_EVENT_TIMEOUT_T3_RTX;
>  	r->idiag_retrans = asoc->rtx_data_chunks;
> -#define EXPIRES_IN_MS(tmo)  DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
> -	r->idiag_expires =
> -		EXPIRES_IN_MS(asoc->timeouts[SCTP_EVENT_TIMEOUT_T3_RTX]);
> -#undef EXPIRES_IN_MS
> +	r->idiag_expires = jiffies_to_msecs(
> +		asoc->timeouts[SCTP_EVENT_TIMEOUT_T3_RTX] - jiffies);

Indentation here is tricky but I don't see any better way.

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

>  }
>  
>  static int inet_diag_msg_sctpladdrs_fill(struct sk_buff *skb,
> -- 
> 2.1.0
> 
> --
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