linux-kernel - Re: [PATCHv4 net-next] dropwatch: Support monitoring of dropped frames

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Message-ID: <20201023112027.74ae41d1@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Fri, 23 Oct 2020 11:20:27 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     izabela.bakollari@...il.com
Cc:     nhorman@...driver.com, davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCHv4 net-next] dropwatch: Support monitoring of dropped
 frames

On Fri, 23 Oct 2020 06:29:43 +0200 izabela.bakollari@...il.com wrote:
> From: Izabela Bakollari <izabela.bakollari@...il.com>
> 
> Dropwatch is a utility that monitors dropped frames by having userspace
> record them over the dropwatch protocol over a file. This augument
> allows live monitoring of dropped frames using tools like tcpdump.
> 
> With this feature, dropwatch allows two additional commands (start and
> stop interface) which allows the assignment of a net_device to the
> dropwatch protocol. When assinged, dropwatch will clone dropped frames,
> and receive them on the assigned interface, allowing tools like tcpdump
> to monitor for them.
> 
> With this feature, create a dummy ethernet interface (ip link add dev
> dummy0 type dummy), assign it to the dropwatch kernel subsystem, by using
> these new commands, and then monitor dropped frames in real time by
> running tcpdump -i dummy0.
> 
> Signed-off-by: Izabela Bakollari <izabela.bakollari@...il.com>

Doesn't seem to apply to net-next, also the tree is closed during the
merge window so please rebase and repost after the weekend.