From: Xin Long <lucien.xin@gmail.com>
To: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: kernel test robot <lkp@intel.com>,
network dev <netdev@vger.kernel.org>,
linux-sctp@vger.kernel.org, kbuild-all@lists.01.org,
Neil Horman <nhorman@tuxdriver.com>,
Michael Tuexen <tuexen@fh-muenster.de>,
Tom Herbert <therbert@google.com>, davem <davem@davemloft.net>
Subject: Re: [PATCH net-next 11/15] sctp: add udphdr to overhead when udp_port is set
Date: Sat, 3 Oct 2020 16:12:58 +0800 [thread overview]
Message-ID: <CADvbK_cPX1f5jrGsKuvya7ssOFPTsG7daBCkOP-NGN9hpzf5Vw@mail.gmail.com> (raw)
Message-ID: <20201003081258.O391SBj3GbqsN6jFqpcwjbqTpSuIUvIvJGLwtFSlgUw@z> (raw)
In-Reply-To: <20201003040824.GG70998@localhost.localdomain>
On Sat, Oct 3, 2020 at 12:08 PM Marcelo Ricardo Leitner
<marcelo.leitner@gmail.com> wrote:
>
> On Wed, Sep 30, 2020 at 03:00:42AM +0800, kernel test robot wrote:
> > Hi Xin,
> >
> > Thank you for the patch! Yet something to improve:
>
> I wonder how are you planning to fix this. It is quite entangled.
> This is not performance critical. Maybe the cleanest way out is to
> move it to a .c file.
>
> Adding a
> #if defined(CONFIG_IP_SCTP) || defined(CONFIG_IP_SCTP_MODULE)
> in there doesn't seem good.
>
> > In file included from include/net/sctp/checksum.h:27,
> > from net/netfilter/nf_nat_proto.c:16:
> > include/net/sctp/sctp.h: In function 'sctp_mtu_payload':
> > >> include/net/sctp/sctp.h:583:31: error: 'struct net' has no member named 'sctp'; did you mean 'ct'?
> > 583 | if (sock_net(&sp->inet.sk)->sctp.udp_port)
> > | ^~~~
> > | ct
> >
Here is actually another problem, I'm still thinking how to fix it.
Now sctp_mtu_payload() returns different value depending on
net->sctp.udp_port. but net->sctp.udp_port can be changed by
"sysctl -w" anytime. so:
In sctp_packet_config() it gets overhead/headroom by calling
sctp_mtu_payload(). When 'udp_port' is 0, it's IP+MAC header
size. Then if 'udp_port' is changed to 9899 by 'sysctl -w',
udphdr will also be added to the packet in sctp_v4_xmit(),
and later the headroom may not be enough for IP+MAC headers.
I'm thinking to add sctp_sock->udp_port, and it'll be set when
the sock is created with net->udp_port. but not sure if we should
update sctp_sock->udp_port with net->udp_port when sending packets?
next prev parent reply other threads:[~2020-10-03 7:57 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 13:48 [PATCH net-next 00/15] sctp: Implement RFC6951: UDP Encapsulation of SCTP Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 01/15] udp: check udp sock encap_type in __udp_lib_err Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 02/15] udp6: move the mss check after udp gso tunnel processing Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 03/15] udp: do checksum properly in skb_udp_tunnel_segment Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 04/15] udp: support sctp over udp " Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 05/15] sctp: create udp4 sock and add its encap_rcv Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 06/15] sctp: create udp6 sock and set " Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:48 ` [PATCH net-next 07/15] sctp: add encap_err_lookup for udp encap socks Xin Long
2020-09-29 13:48 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 08/15] sctp: add encap_port for netns sock asoc and transport Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 09/15] sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 10/15] sctp: allow changing transport encap_port by peer packets Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 11/15] sctp: add udphdr to overhead when udp_port is set Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 12/15] sctp: call sk_setup_caps in sctp_packet_transmit instead Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 13/15] sctp: support for sending packet over udp4 sock Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 14/15] sctp: support for sending packet over udp6 sock Xin Long
2020-09-29 13:49 ` Xin Long
2020-09-29 13:49 ` [PATCH net-next 15/15] sctp: enable udp tunneling socks Xin Long
2020-09-29 13:49 ` Xin Long
2020-10-03 4:12 ` Marcelo Ricardo Leitner
2020-10-03 4:12 ` Marcelo Ricardo Leitner
2020-10-03 8:20 ` Xin Long
2020-10-03 8:20 ` Xin Long
2020-09-29 16:25 ` [PATCH net-next 13/15] sctp: support for sending packet over udp4 sock kernel test robot
2020-09-29 16:25 ` kernel test robot
2020-09-30 6:26 ` Xin Long
2020-09-30 6:26 ` Xin Long
2020-09-29 19:19 ` kernel test robot
2020-09-29 19:19 ` kernel test robot
2020-10-03 4:09 ` [PATCH net-next 12/15] sctp: call sk_setup_caps in sctp_packet_transmit instead Marcelo Ricardo Leitner
2020-10-03 4:09 ` Marcelo Ricardo Leitner
2020-10-03 7:45 ` Xin Long
2020-10-03 7:45 ` Xin Long
2020-09-29 19:00 ` [PATCH net-next 11/15] sctp: add udphdr to overhead when udp_port is set kernel test robot
2020-09-29 19:00 ` kernel test robot
2020-10-03 4:08 ` Marcelo Ricardo Leitner
2020-10-03 4:08 ` Marcelo Ricardo Leitner
2020-10-03 7:57 ` Xin Long [this message]
2020-10-03 8:12 ` Xin Long
2020-10-03 11:23 ` Xin Long
2020-10-03 11:23 ` Xin Long
2020-10-03 12:24 ` Xin Long
2020-10-03 12:24 ` Xin Long
2020-10-05 19:01 ` Marcelo Ricardo Leitner
2020-10-05 19:01 ` Marcelo Ricardo Leitner
2020-10-05 20:08 ` Michael Tuexen
2020-10-05 20:08 ` Michael Tuexen
2020-10-08 9:37 ` Xin Long
2020-10-08 9:37 ` Xin Long
2020-10-03 4:07 ` Marcelo Ricardo Leitner
2020-10-03 4:07 ` Marcelo Ricardo Leitner
2020-10-03 7:54 ` Xin Long
2020-10-03 7:54 ` Xin Long
2020-10-03 4:06 ` [PATCH net-next 10/15] sctp: allow changing transport encap_port by peer packets Marcelo Ricardo Leitner
2020-10-03 4:06 ` Marcelo Ricardo Leitner
2020-10-03 4:05 ` [PATCH net-next 09/15] sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt Marcelo Ricardo Leitner
2020-10-03 4:05 ` Marcelo Ricardo Leitner
2020-10-03 7:41 ` Xin Long
2020-10-03 7:41 ` Xin Long
2020-10-03 4:04 ` [PATCH net-next 03/15] udp: do checksum properly in skb_udp_tunnel_segment Marcelo Ricardo Leitner
2020-10-03 4:04 ` Marcelo Ricardo Leitner
2020-10-03 7:40 ` Xin Long
2020-10-03 7:40 ` Xin Long
2020-09-29 16:39 ` [PATCH net-next 00/15] sctp: Implement RFC6951: UDP Encapsulation of SCTP Michael Tuexen
2020-09-29 16:39 ` Michael Tuexen
2020-09-29 17:49 ` Xin Long
2020-09-29 18:04 ` Xin Long
2020-10-01 12:41 ` Marcelo Ricardo Leitner
2020-10-01 12:41 ` Marcelo Ricardo Leitner
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