From: Stephen Hemminger <stephen@networkplumber.org>
To: Vincent Bernat <vincent@bernat.im>
Cc: netdev@vger.kernel.org, bridge@lists.linux-foundation.org,
David Miller <davem@davemloft.net>,
David Ahern <dsahern@gmail.com>
Subject: Re: [net-next v3] bridge: trigger RTM_NEWLINK when interface is modified by bridge ioctl
Date: Thu, 21 Sep 2017 08:15:42 -0700 [thread overview]
Message-ID: <20170921081542.4c266c83@xeon-e3> (raw)
In-Reply-To: <20170921100525.20395-1-vincent@bernat.im>
On Thu, 21 Sep 2017 12:05:25 +0200
Vincent Bernat <vincent@bernat.im> wrote:
> Currently, there is a difference in netlink events received when an
> interface is modified through bridge ioctl() or through netlink. This
> patch generates additional events when an interface is added to or
> removed from a bridge via ioctl().
>
> When adding then removing an interface from a bridge with netlink, we
> get:
>
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
>
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> Deleted 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
>
> When using ioctl():
>
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
>
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> Deleted 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN
> link/ether 9e:da:60:ee:cf:c8
> 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
> link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff
>
> Without this patch, the last netlink notification is not sent.
>
> Signed-off-by: Vincent Bernat <vincent@bernat.im>
This makes sense, you should probably add a Fixes: tag to help maintainers
of long term stable kernels.
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
next prev parent reply other threads:[~2017-09-21 15:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-15 19:38 [PATCH net-next v1] bridge: also trigger RTM_NEWLINK when interface is released from bridge Vincent Bernat
2017-09-15 21:08 ` Vincent Bernat
2017-09-16 14:18 ` [PATCH net-next v2] " Vincent Bernat
2017-09-20 21:09 ` David Miller
2017-09-20 21:57 ` David Ahern
2017-09-20 22:12 ` Vincent Bernat
2017-09-20 22:41 ` David Miller
2017-09-20 23:21 ` Stephen Hemminger
2017-09-21 10:04 ` Vincent Bernat
2017-09-21 15:09 ` Roopa Prabhu
2017-09-21 15:31 ` Vincent Bernat
2017-09-21 10:05 ` [net-next v3] bridge: trigger RTM_NEWLINK when interface is modified by bridge ioctl Vincent Bernat
2017-09-21 15:15 ` Stephen Hemminger [this message]
2017-09-21 15:45 ` Vincent Bernat
2017-09-21 16:43 ` David Ahern
2017-09-21 17:20 ` Roopa Prabhu
2017-09-21 17:29 ` David Ahern
2017-09-21 22:45 ` David Miller
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