datapath: Add support for namespace.

[sliver-openvswitch.git] / datapath / dp_sysfs_dp.c

diff --git a/datapath/dp_sysfs_dp.c b/datapath/dp_sysfs_dp.c
index 1574a93..2582321 100644 (file)
--- a/datapath/dp_sysfs_dp.c
+++ b/datapath/dp_sysfs_dp.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007-2011 Nicira Networks.
+ * Copyright (c) 2007-2012 Nicira Networks.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of version 2 of the GNU General Public
@@ -366,6 +366,12 @@ int ovs_dp_sysfs_add_dp(struct datapath *dp)
        struct kobject *kobj = vport->ops->get_kobj(vport);
        int err;
 
+#ifdef CONFIG_NET_NS
+       /* Due to bug in 2.6.32 kernel, sysfs_create_group() could panic
+        * in other namespace than init_net. Following check is to avoid it. */
+       if (!kobj->sd)
+               return -ENOENT;
+#endif
        /* Create /sys/class/net/<devname>/bridge directory. */
        err = sysfs_create_group(kobj, &bridge_group);
        if (err) {
@@ -395,6 +401,11 @@ int ovs_dp_sysfs_del_dp(struct datapath *dp)
        struct vport *vport = rtnl_dereference(dp->ports[OVSP_LOCAL]);
        struct kobject *kobj = vport->ops->get_kobj(vport);
 
+#ifdef CONFIG_NET_NS
+       if (!kobj->sd)
+               return 0;
+#endif
+
        kobject_del(&dp->ifobj);
        sysfs_remove_group(kobj, &bridge_group);