netdev - Re: [PATCH] net: UDP repair mode for retrieving the send queue of corked UDP socket

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Date:   Thu, 9 Apr 2020 01:25:27 +0300
From:   Leşe Doru Călin <lesedorucalin01@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        netdev@...r.kernel.org
Subject: Re: [PATCH] net: UDP repair mode for retrieving the send queue of
 corked UDP socket

On Wed, Apr 08, 2020 at 02:27:49PM -0700, David Miller wrote:
> From: Lese Doru Calin <lesedorucalin01@...il.com>
> Date: Wed, 8 Apr 2020 23:59:54 +0300
> 
> > Hello everyone!
> > 
> > In this year's edition of GSoC, there is a project idea for CRIU to add support
> > for checkpoint/restore of cork-ed UDP sockets. But to add it, the kernel API needs
> > to be extended.
> > This is what this patch does. It adds UDP "repair mode" for UDP sockets in a similar
> > approach to the TCP "repair mode", but only the send queue is necessary to be retrieved.
> > So the patch extends the recv and setsockopt syscalls. Using UDP_REPAIR option in
> > setsockopt, caller can set the socket in repair mode. If it is setted, the
> > recv/recvfrom/recvmsg will receive the write queue and the destination of the data.
> > As in the TCP mode, to change the repair mode requires the CAP_NET_ADMIN capability
> > and to receive data the caller is obliged to use the MSG_PEEK flag.
> > 
> > Best regards,
> > Lese Doru
> > 
> > Signed-off-by: Lese Doru Calin <lesedorucalin01@...il.com>
> 
> Why do I feel like I've seen this patch several times before?

Maybe others contestants in GSoC already sended a patch for this.
This is the my first time when try.