netdev - batman-adv: Unable to add interface in LXC

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Date:	Sun, 30 Dec 2012 20:34:38 +0100
From:	Pau Koning <paukoning@...il.com>
To:	b.a.t.m.a.n@...ts.open-mesh.org
Cc:	netdev@...r.kernel.org
Subject: batman-adv: Unable to add interface in LXC

I am running LXC (SID) under Debian SID and the current git version of
batman-adv (v3.7-rc7-1325-gaf5d4f7) +batctl (v2012.4.0-30-ga395164).
But it fails to add any of my interfaces and non-batman-adv interfaces
can be created without problems

# ip link
13: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP mode DEFAULT qlen 1000
    link/ether 00:ff:aa:00:00:01 brd ff:ff:ff:ff:ff:ff
15: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
mode DEFAULT
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
# batctl if add eth0
Error - can't open file '/sys/class/net/eth0/batman_adv/mesh_iface':
Read-only file system
# ls -l /sys/class/net/eth0/batman_adv/mesh_iface
-rw-r--r-- 1 root root 4096 Dec 30 18:26
/sys/class/net/eth0/batman_adv/mesh_iface
# id
uid=0(root) gid=0(root) groups=0(root)
# ip link add dev br0 type bridge
# ip link set dev eth0 master br0
# ip link
18: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
master br0 state UP mode DEFAULT qlen 1000
    link/ether 00:ff:aa:00:00:01 brd ff:ff:ff:ff:ff:ff
20: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
mode DEFAULT
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
21: br0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT
    link/ether 00:ff:aa:00:00:01 brd ff:ff:ff:ff:ff:ff
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