From: Stephen Hemminger <stephen@networkplumber.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: netdev@vger.kernel.org
Subject: Problem with iflink in netns
Date: Tue, 13 May 2014 08:39:45 -0700 [thread overview]
Message-ID: <20140513083945.062de6c3@nehalam.linuxnetplumber.net> (raw)
There have been a couple of bugzilla reports already about cases where a macvlan
or vlan is moved into another namespace. In these cases the parent device ifindex (iflink)
is no longer valid.
Normally it is not a big issue, until another device is created using the ifindex
of the parent
Does anyone have a suggested fix? Marking iflink as 0 won't work then the devices no
longer appear as slaves. Another possibility would be to make block creation of device
where ifindex matches existing iflink of other devices; but this would slow down device
creation.
The bugs come in as ip command bugs, but obviously the issue is in the kernel.
https://bugzilla.kernel.org/show_bug.cgi?id=66691
https://bugzilla.kernel.org/show_bug.cgi?id=75911
next reply other threads:[~2014-05-13 15:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-13 15:39 Stephen Hemminger [this message]
2014-05-13 18:20 ` Problem with iflink in netns Cong Wang
2014-05-13 20:05 ` Stephen Hemminger
2014-05-13 20:44 ` Cong Wang
2014-05-14 0:51 ` Stephen Hemminger
2014-05-14 21:11 ` Cong Wang
2014-05-14 8:23 ` Nicolas Dichtel
2014-07-02 11:59 ` [RFC PATCH net-next 0/5] netns: allow to identify peer netns Nicolas Dichtel
2014-07-02 11:59 ` [RFC PATCH net-next 1/5] netns: allocate netns ids Nicolas Dichtel
2014-07-02 13:33 ` Sergei Shtylyov
2014-07-02 13:57 ` Nicolas Dichtel
2014-07-02 11:59 ` [RFC PATCH net-next 2/5] netns: add genl cmd to get the id of a netns Nicolas Dichtel
2014-07-02 11:59 ` [RFC PATCH net-next 3/5] rtnl: add link netns id to interface messages Nicolas Dichtel
2014-07-02 11:59 ` [RFC PATCH net-next 4/5] iptunnels: advertise link netns via netlink Nicolas Dichtel
2014-07-02 11:59 ` [RFC PATCH net-next 5/5] rtnl: allow to create device with IFLA_LINK_NETNSID set Nicolas Dichtel
2014-07-02 20:09 ` [RFC PATCH net-next 0/5] netns: allow to identify peer netns Eric W. Biederman
2014-07-02 21:47 ` Nicolas Dichtel
2014-07-15 14:32 ` Nicolas Dichtel
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