[Linux-kernel-mentees] [PATCHv2 net-next] dropwatch: Support monitoring of dropped frames

Cong Wang xiyou.wangcong at gmail.com
Tue Aug 4 21:28:28 UTC 2020


On Tue, Aug 4, 2020 at 9:14 AM <izabela.bakollari at gmail.com> wrote:
>
> From: Izabela Bakollari <izabela.bakollari at gmail.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.

drop monitor is already able to send dropped packets to user-space,
and wireshark already catches up with this feature:

https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commitdiff;h=a94a860c0644ec3b8a129fd243674a2e376ce1c8

So what you propose here seems pretty much a duplicate?

Thanks.


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