linux-kernel - Re: [PATCH 04/13] bridge: netfilter: Convert compare_ether_addr to ether_addr

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Date:	Wed, 9 May 2012 08:07:52 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Joe Perches <joe@...ches.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Bart De Schuymer <bart.de.schuymer@...dora.be>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, bridge@...ts.linux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/13] bridge: netfilter: Convert compare_ether_addr to
 ether_addr_equal

On Tue,  8 May 2012 21:56:48 -0700
Joe Perches <joe@...ches.com> wrote:

> Use the new bool function ether_addr_equal to add
> some clarity and reduce the likelihood for misuse
> of compare_ether_addr for sorting.
> 
> Done via cocci script:
> 
> $ cat compare_ether_addr.cocci
> @@
> expression a,b;
> @@
> -	!compare_ether_addr(a, b)
> +	ether_addr_equal(a, b)
> 
> @@
> expression a,b;
> @@
> -	compare_ether_addr(a, b)
> +	!ether_addr_equal(a, b)
> 
> @@
> expression a,b;
> @@
> -	!ether_addr_equal(a, b) == 0
> +	ether_addr_equal(a, b)
> 
> @@
> expression a,b;
> @@
> -	!ether_addr_equal(a, b) != 0
> +	!ether_addr_equal(a, b)
> 
> @@
> expression a,b;
> @@
> -	ether_addr_equal(a, b) == 0
> +	!ether_addr_equal(a, b)
> 
> @@
> expression a,b;
> @@
> -	ether_addr_equal(a, b) != 0
> +	ether_addr_equal(a, b)
> 
> @@
> expression a,b;
> @@
> -	!!ether_addr_equal(a, b)
> +	ether_addr_equal(a, b)
> 
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
>  net/bridge/netfilter/ebt_stp.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/net/bridge/netfilter/ebt_stp.c b/net/bridge/netfilter/ebt_stp.c
> index 5b33a2e..071d872 100644
> --- a/net/bridge/netfilter/ebt_stp.c
> +++ b/net/bridge/netfilter/ebt_stp.c
> @@ -164,8 +164,8 @@ static int ebt_stp_mt_check(const struct xt_mtchk_param *par)
>  	    !(info->bitmask & EBT_STP_MASK))
>  		return -EINVAL;
>  	/* Make sure the match only receives stp frames */
> -	if (compare_ether_addr(e->destmac, bridge_ula) ||
> -	    compare_ether_addr(e->destmsk, msk) || !(e->bitmask & EBT_DESTMAC))
> +	if (!ether_addr_equal(e->destmac, bridge_ula) ||
> +	    !ether_addr_equal(e->destmsk, msk) || !(e->bitmask & EBT_DESTMAC))
>  		return -EINVAL;
>  
>  	return 0;

All look good.
Acked-by: Stephen Hemminger <shemminger@...tta.com>

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