Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / kobject_ns.h

diff --git a/kernel/include/linux/kobject_ns.h b/kernel/include/linux/kobject_ns.h
new file mode 100644 (file)
index 0000000..df32d25
--- /dev/null
+++ b/kernel/include/linux/kobject_ns.h
@@ -0,0 +1,60 @@
+/* Kernel object name space definitions
+ *
+ * Copyright (c) 2002-2003 Patrick Mochel
+ * Copyright (c) 2002-2003 Open Source Development Labs
+ * Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (c) 2006-2008 Novell Inc.
+ *
+ * Split from kobject.h by David Howells (dhowells@redhat.com)
+ *
+ * This file is released under the GPLv2.
+ *
+ * Please read Documentation/kobject.txt before using the kobject
+ * interface, ESPECIALLY the parts about reference counts and object
+ * destructors.
+ */
+
+#ifndef _LINUX_KOBJECT_NS_H
+#define _LINUX_KOBJECT_NS_H
+
+struct sock;
+struct kobject;
+
+/*
+ * Namespace types which are used to tag kobjects and sysfs entries.
+ * Network namespace will likely be the first.
+ */
+enum kobj_ns_type {
+       KOBJ_NS_TYPE_NONE = 0,
+       KOBJ_NS_TYPE_NET,
+       KOBJ_NS_TYPES
+};
+
+/*
+ * Callbacks so sysfs can determine namespaces
+ *   @grab_current_ns: return a new reference to calling task's namespace
+ *   @netlink_ns: return namespace to which a sock belongs (right?)
+ *   @initial_ns: return the initial namespace (i.e. init_net_ns)
+ *   @drop_ns: drops a reference to namespace
+ */
+struct kobj_ns_type_operations {
+       enum kobj_ns_type type;
+       bool (*current_may_mount)(void);
+       void *(*grab_current_ns)(void);
+       const void *(*netlink_ns)(struct sock *sk);
+       const void *(*initial_ns)(void);
+       void (*drop_ns)(void *);
+};
+
+int kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
+int kobj_ns_type_registered(enum kobj_ns_type type);
+const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent);
+const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
+
+bool kobj_ns_current_may_mount(enum kobj_ns_type type);
+void *kobj_ns_grab_current(enum kobj_ns_type type);
+const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk);
+const void *kobj_ns_initial(enum kobj_ns_type type);
+void kobj_ns_drop(enum kobj_ns_type type, void *ns);
+
+#endif /* _LINUX_KOBJECT_NS_H */