60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Kernel object name space definitions
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*
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* Copyright (c) 2002-2003 Patrick Mochel
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* Copyright (c) 2002-2003 Open Source Development Labs
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* Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (c) 2006-2008 Novell Inc.
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*
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* Split from kobject.h by David Howells (dhowells@redhat.com)
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*
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* Please read Documentation/core-api/kobject.rst before using the kobject
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* interface, ESPECIALLY the parts about reference counts and object
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* destructors.
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*/
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#ifndef _LINUX_KOBJECT_NS_H
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#define _LINUX_KOBJECT_NS_H
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struct sock;
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struct kobject;
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/*
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* Namespace types which are used to tag kobjects and sysfs entries.
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* Network namespace will likely be the first.
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*/
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enum kobj_ns_type {
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KOBJ_NS_TYPE_NONE = 0,
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KOBJ_NS_TYPE_NET,
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KOBJ_NS_TYPES
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};
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/*
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* Callbacks so sysfs can determine namespaces
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* @grab_current_ns: return a new reference to calling task's namespace
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* @netlink_ns: return namespace to which a sock belongs (right?)
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* @initial_ns: return the initial namespace (i.e. init_net_ns)
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* @drop_ns: drops a reference to namespace
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*/
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struct kobj_ns_type_operations {
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enum kobj_ns_type type;
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bool (*current_may_mount)(void);
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void *(*grab_current_ns)(void);
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const void *(*netlink_ns)(struct sock *sk);
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const void *(*initial_ns)(void);
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void (*drop_ns)(void *);
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};
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int kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
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int kobj_ns_type_registered(enum kobj_ns_type type);
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const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent);
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const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
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bool kobj_ns_current_may_mount(enum kobj_ns_type type);
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void *kobj_ns_grab_current(enum kobj_ns_type type);
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const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk);
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const void *kobj_ns_initial(enum kobj_ns_type type);
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void kobj_ns_drop(enum kobj_ns_type type, void *ns);
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#endif /* _LINUX_KOBJECT_NS_H */
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