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TOMOYO Linux Cross Reference
Linux/include/linux/kobject_ns.h

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  1 /* Kernel object name space definitions
  2  *
  3  * Copyright (c) 2002-2003 Patrick Mochel
  4  * Copyright (c) 2002-2003 Open Source Development Labs
  5  * Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com>
  6  * Copyright (c) 2006-2008 Novell Inc.
  7  *
  8  * Split from kobject.h by David Howells (dhowells@redhat.com)
  9  *
 10  * This file is released under the GPLv2.
 11  *
 12  * Please read Documentation/kobject.txt before using the kobject
 13  * interface, ESPECIALLY the parts about reference counts and object
 14  * destructors.
 15  */
 16 
 17 #ifndef _LINUX_KOBJECT_NS_H
 18 #define _LINUX_KOBJECT_NS_H
 19 
 20 struct sock;
 21 struct kobject;
 22 
 23 /*
 24  * Namespace types which are used to tag kobjects and sysfs entries.
 25  * Network namespace will likely be the first.
 26  */
 27 enum kobj_ns_type {
 28         KOBJ_NS_TYPE_NONE = 0,
 29         KOBJ_NS_TYPE_NET,
 30         KOBJ_NS_TYPES
 31 };
 32 
 33 /*
 34  * Callbacks so sysfs can determine namespaces
 35  *   @grab_current_ns: return a new reference to calling task's namespace
 36  *   @netlink_ns: return namespace to which a sock belongs (right?)
 37  *   @initial_ns: return the initial namespace (i.e. init_net_ns)
 38  *   @drop_ns: drops a reference to namespace
 39  */
 40 struct kobj_ns_type_operations {
 41         enum kobj_ns_type type;
 42         bool (*current_may_mount)(void);
 43         void *(*grab_current_ns)(void);
 44         const void *(*netlink_ns)(struct sock *sk);
 45         const void *(*initial_ns)(void);
 46         void (*drop_ns)(void *);
 47 };
 48 
 49 int kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
 50 int kobj_ns_type_registered(enum kobj_ns_type type);
 51 const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent);
 52 const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
 53 
 54 bool kobj_ns_current_may_mount(enum kobj_ns_type type);
 55 void *kobj_ns_grab_current(enum kobj_ns_type type);
 56 const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk);
 57 const void *kobj_ns_initial(enum kobj_ns_type type);
 58 void kobj_ns_drop(enum kobj_ns_type type, void *ns);
 59 
 60 #endif /* _LINUX_KOBJECT_NS_H */
 61 

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