netdev - Re: [PATCH v3 net-next] sockopt: Change getsockopt() of SO

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Date:	Wed, 28 Nov 2012 00:36:01 +0400
From:	Pavel Emelyanov <xemul@...allels.com>
To:	Brian Haley <brian.haley@...com>
CC:	David Miller <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 net-next] sockopt: Change getsockopt() of SO_BINDTODEVICE
 to return an interface name

On 11/26/2012 07:21 PM, Brian Haley wrote:
> Instead of having the getsockopt() of SO_BINDTODEVICE return an index, which
> will then require another call like if_indextoname() to get the actual interface
> name, have it return the name directly.
> 
> This also matches the existing man page description on socket(7) which mentions
> the argument being an interface name.
> 
> If the value has not been set, zero is returned and optlen will be set to zero
> to indicate there is no interface name present.
> 
> Added a seqlock to protect this code path, and dev_ifname(), from someone
> changing the device name via dev_change_name().
> 
> v2: Added seqlock protection while copying device name.
> 
> v3: Fixed word wrap in patch.
> 
> Signed-off-by: Brian Haley <brian.haley@...com>

Acked-by: Pavel Emelyanov <xemul@...allels.com>

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