From: Stephen Hemminger <stephen@networkplumber.org>
To: netdev@vger.kernel.org
Subject: Fw: [Bug 66691] New: iproute2: macvlan: Wrong root device shown if in different netns
Date: Fri, 6 Dec 2013 12:05:43 -0800 [thread overview]
Message-ID: <20131206120543.0afaafb5@nehalam.linuxnetplumber.net> (raw)
This isn't a iproute2 bug, it is only reporting what the kernel tells it
Begin forwarded message:
Date: Fri, 6 Dec 2013 00:07:15 -0800
From: "bugzilla-daemon@bugzilla.kernel.org" <bugzilla-daemon@bugzilla.kernel.org>
To: "stephen@networkplumber.org" <stephen@networkplumber.org>
Subject: [Bug 66691] New: iproute2: macvlan: Wrong root device shown if in different netns
https://bugzilla.kernel.org/show_bug.cgi?id=66691
Bug ID: 66691
Summary: iproute2: macvlan: Wrong root device shown if in
different netns
Product: Networking
Version: 2.5
Kernel Version: 3.10
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
Assignee: shemminger@linux-foundation.org
Reporter: helmut.schaa@googlemail.com
Regression: No
In the root net namespace if have the following devices:
> ip link
[...]
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
mode DEFAULT group default qlen 1000
link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
3: gre0: <NOARP> mtu 1476 qdisc noop state DOWN mode DEFAULT group default
link/gre 0.0.0.0 brd 0.0.0.0
[...]
Let's add a macvlan on top of eth0:
> ip link
[...]
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP
mode DEFAULT group default qlen 1000
link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
3: gre0: <NOARP> mtu 1476 qdisc noop state DOWN mode DEFAULT group default
link/gre 0.0.0.0 brd 0.0.0.0
[...]
17: mac0@eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode
DEFAULT group default
link/ether 46:aa:b4:fb:44:a6 brd ff:ff:ff:ff:ff:ff
And now lets move it into its own net namespace and list the devices in the new
namespace.
> ip link set mac0 netns myns
> ip netns exec myns ip link
[...]
2: gre0: <NOARP> mtu 1476 qdisc noop state DOWN mode DEFAULT group default
link/gre 0.0.0.0 brd 0.0.0.0
[...]
17: mac0@gre0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode
DEFAULT group default
link/ether 46:aa:b4:fb:44:a6 brd ff:ff:ff:ff:ff:ff
mac0 shows gre0 as its base device which is not correct. However gre0 has the
same ifindex in the new namespace as eth0 in the root namespace and the ifindex
is used for finding the base device.
commit aa79e66eee5d525e2fcbd2a5fcb87ae3dd4aa9e9 "net: Make ifindex generation
per-net namespace" changed the ifindex generation to only be unique within a
namespace.
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next reply other threads:[~2013-12-06 20:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-06 20:05 Stephen Hemminger [this message]
[not found] ` <CAGXs5wXC+eTZD3sXD4zFtkpY8tcU14Kr6AiA9=kugHups_KCHA@mail.gmail.com>
2013-12-07 9:18 ` Fw: [Bug 66691] New: iproute2: macvlan: Wrong root device shown if in different netns Kevin Wilson
2013-12-09 8:02 ` Michal Kubecek
2013-12-16 10:38 ` Helmut Schaa
2013-12-16 10:41 ` Pavel Emelyanov
2013-12-16 10:47 ` Helmut Schaa
2013-12-16 11:01 ` Pavel Emelyanov
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