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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Bui Quang Minh <minhquangbui99@gmail.com>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org, yoshfuji@linux-ipv6.org,
	dsahern@kernel.org, willemb@google.com, pabeni@redhat.com,
	avagin@gmail.com, alexander@mihalicyn.com,
	lesedorucalin01@gmail.com
Subject: Re: [PATCH v2 1/2] udp: UDP socket send queue repair
Date: Wed, 11 Aug 2021 18:14:30 +0200	[thread overview]
Message-ID: <721a2e32-c930-ad6b-5055-631b502ed11b@gmail.com> (raw)
In-Reply-To: <20210811154557.6935-1-minhquangbui99@gmail.com>



On 8/11/21 5:45 PM, Bui Quang Minh wrote:
> In this patch, I implement UDP_REPAIR sockoption and a new path in
> udp_recvmsg for dumping the corked packet in UDP socket's send queue.
> 
> A userspace program can use recvmsg syscall to get the packet's data and
> the msg_name information of the packet. Currently, other related
> information in inet_cork that are set in cmsg are not dumped.
> 
> While working on this, I was aware of Lese Doru Calin's patch and got some
> ideas from it.


What is the use case for this feature, adding a test in UDP fast path ?

CORKed UDP is hardly used nowadays.

IMO, TCP_REPAIR hijacking standard system calls was a design error,
we should have added new system calls.


  reply	other threads:[~2021-08-11 16:14 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-11 15:45 Bui Quang Minh
2021-08-11 16:14 ` Eric Dumazet [this message]
2021-08-12 13:46   ` Bui Quang Minh
2021-08-12 15:51     ` Eric Dumazet
2021-08-13 11:08       ` Bui Quang Minh
2021-08-13 13:00         ` David Laight
2021-08-17 16:22           ` avagin
2021-08-16 14:35         ` Willem de Bruijn
2021-08-16 14:38 ` Willem de Bruijn

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