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netns: filter out uevent not belonging to init_net

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This patch will filter out the uevent not related to the init_net.
Without this patch if a network device is created in a network
namespace with the same name as one network device belonging to the
initial network namespace (eg. eth0), when the network namespace
will die and the network device will be destroyed, an event will
be sent and catched by the udevd daemon. That will result to have
the real network device to be shutdown because the udevd/uevent are
not namespace aware.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lezcano 2008-11-25 16:46:37 -08:00 committed by David S. Miller
parent cb13fc209f
commit 09bb52175b
1 changed files with 3 additions and 0 deletions
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3
net/core/net-sysfs.c
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@ -427,6 +427,9 @@ static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
struct net_device *dev = to_net_dev(d);
int retval;
if (!net_eq(dev_net(dev), &init_net))
return 0;
/* pass interface to uevent. */
retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
if (retval)