netdev - Re: [PATCH] packet_mmap: expose hw packet timestamps to network packet capture utilities

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Date:	Wed, 02 Jun 2010 05:54:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	scott.a.mcmillan@...el.com
Cc:	netdev@...r.kernel.org, tcpdump-workers@...ts.tcpdump.org
Subject: Re: [PATCH] packet_mmap: expose hw packet timestamps to network
 packet capture utilities

From: "Mcmillan, Scott A" <scott.a.mcmillan@...el.com>
Date: Thu, 27 May 2010 09:58:19 -0700

> Subject: [RFC PATCH] packet_mmap: expose hw packet timestamps to network packet capture utilities
> 
> This patch adds a setting, PACKET_TIMESTAMP, to specify the packet
> timestamp source that is exported to capture utilities like tcpdump
> by packet_mmap.
> 
> PACKET_TIMESTAMP accepts the same integer bit field as
> SO_TIMESTAMPING.  However, only the SOF_TIMESTAMPING_SYS_HARDWARE
> and SOF_TIMESTAMPING_RAW_HARDWARE values are currently recognized by
> PACKET_TIMESTAMP.  SOF_TIMESTAMPING_SYS_HARDWARE takes precedence
> over SOF_TIMESTAMPING_RAW_HARDWARE if both bits are set.
> 
> If PACKET_TIMESTAMP is not set, a software timestamp generated
> inside the networking stack is used (the behavior before this
> setting was added).
> 
> Signed-off-by: Scott McMillan <scott.a.mcmillan@...el.com>

Ok, this looks fine, applied.

Thanks.
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