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From: Vladimir Oltean <olteanv@gmail.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "Ansuel Smith" <ansuelsmth@gmail.com>,
	netdev@vger.kernel.org, "Marek Behún" <marek.behun@nic.cz>,
	"David Ahern" <dsahern@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Vivien Didelot" <vivien.didelot@gmail.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Andrii Nakryiko" <andriin@fb.com>,
	"Eric Dumazet" <edumazet@google.com>,
	"Wei Wang" <weiwan@google.com>,
	"Cong Wang" <cong.wang@bytedance.com>,
	"Taehee Yoo" <ap420073@gmail.com>,
	"Björn Töpel" <bjorn@kernel.org>, "Di Zhu" <zhudi21@huawei.com>,
	"Weilong Chen" <chenweilong@huawei.com>,
	"Nikolay Aleksandrov" <nikolay@nvidia.com>,
	"Colin Ian King" <colin.king@canonical.com>,
	"Roopa Prabhu" <roopa@cumulusnetworks.com>,
	"Francis Laniel" <laniel_francis@privacyrequired.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC iproute2-next] iplink: allow to change iplink value
Date: Sun, 11 Apr 2021 20:09:39 +0300	[thread overview]
Message-ID: <20210411170939.cxmva5vdcpqu4bmi@skbuf> (raw)
In-Reply-To: <20210411100411.6d16e51d@hermes.local>

On Sun, Apr 11, 2021 at 10:04:11AM -0700, Stephen Hemminger wrote:
> On Sat, 10 Apr 2021 15:34:50 +0200
> Ansuel Smith <ansuelsmth@gmail.com> wrote:
> 
> > Allow to change the interface to which a given interface is linked to.
> > This is useful in the case of multi-CPU port DSA, for changing the CPU
> > port of a given user port.
> > 
> > Signed-off-by: Marek Behún <marek.behun@nic.cz>
> > Cc: David Ahern <dsahern@gmail.com>
> > Cc: Stephen Hemminger <stephen@networkplumber.org>
> 
> This may work for DSA but it won't work for all the device types vlan/macsec/... that
> now use the link attribute.  It looks like the change link handling for those
> device types just ignores the link attribute (maybe ok). But before supporting this
> as an API, it would be better if all the other drivers that use IFLA_LINK
> had error checks in their change link handling.
> 
> Please add error checks in kernel first.

Would it be better to expose this as a netlink attribute specific to
DSA, instead of iflink which as you point out has uses for other virtual
interfaces like veth, and the semantics there are not quite the same?

  reply	other threads:[~2021-04-11 17:09 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-10 13:34 [PATCH RFC net-next 0/3] Multi-CPU DSA support Ansuel Smith
2021-04-10 13:34 ` [PATCH RFC net-next 1/3] net: dsa: allow for multiple CPU ports Ansuel Smith
2021-04-12  3:35   ` DENG Qingfang
2021-04-12  4:41     ` Ansuel Smith
2021-04-12 15:30       ` DENG Qingfang
2021-04-12 16:17         ` Frank Wunderlich
2021-04-10 13:34 ` [PATCH RFC net-next 2/3] net: add ndo for setting the iflink property Ansuel Smith
2021-04-10 13:34 ` [PATCH RFC net-next 3/3] net: dsa: implement ndo_set_netlink for chaning port's CPU port Ansuel Smith
2021-04-10 13:34 ` [PATCH RFC iproute2-next] iplink: allow to change iplink value Ansuel Smith
2021-04-11 17:04   ` Stephen Hemminger
2021-04-11 17:09     ` Vladimir Oltean [this message]
2021-04-11 18:01 ` [PATCH RFC net-next 0/3] Multi-CPU DSA support Marek Behun
2021-04-11 18:08   ` Ansuel Smith
2021-04-11 18:39   ` Andrew Lunn
2021-04-12  2:07     ` Florian Fainelli
2021-04-12  4:53     ` Ansuel Smith
2021-04-11 18:50   ` Vladimir Oltean
2021-04-11 23:53     ` Vladimir Oltean
2021-04-12  2:10       ` Florian Fainelli
2021-04-12  5:04     ` Ansuel Smith
2021-04-12 12:46     ` Tobias Waldekranz
2021-04-12 14:35       ` Vladimir Oltean
2021-04-12 21:06         ` Tobias Waldekranz
2021-04-12 19:30       ` Marek Behun
2021-04-12 21:22         ` Tobias Waldekranz
2021-04-12 21:34           ` Vladimir Oltean
2021-04-12 21:49             ` Tobias Waldekranz
2021-04-12 21:56               ` Marek Behun
2021-04-12 22:06               ` Vladimir Oltean
2021-04-12 22:26                 ` Tobias Waldekranz
2021-04-12 22:48                   ` Vladimir Oltean
2021-04-12 23:04                     ` Marek Behun
2021-04-12 21:50           ` Marek Behun
2021-04-12 22:05             ` Tobias Waldekranz
2021-04-12 22:55               ` Marek Behun
2021-04-12 23:09                 ` Tobias Waldekranz
2021-04-12 23:13                   ` Tobias Waldekranz
2021-04-12 23:54                     ` Marek Behun
2021-04-13  0:27                       ` Marek Behun
2021-04-13  0:31                         ` Marek Behun
2021-04-13 14:46                         ` Tobias Waldekranz
2021-04-13 15:14                           ` Marek Behun
2021-04-13 18:16                             ` Tobias Waldekranz
2021-04-14 15:14                               ` Marek Behun
2021-04-14 18:39                                 ` Tobias Waldekranz
2021-04-14 23:39                                   ` Vladimir Oltean
2021-04-15  9:20                                     ` Tobias Waldekranz
2021-04-13 14:40                       ` Tobias Waldekranz
2021-04-12 15:00     ` DENG Qingfang
2021-04-12 16:32       ` Vladimir Oltean
2021-04-12 22:04         ` Marek Behun
2021-04-12 22:17           ` Vladimir Oltean
2021-04-12 22:47             ` Marek Behun
  -- strict thread matches above, loose matches on Subject: below --
2019-08-24  2:42 Marek Behún
2019-08-24  2:42 ` [PATCH RFC iproute2-next] iplink: allow to change iplink value Marek Behún

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