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d9d16e16 | 1 | // SPDX-License-Identifier: GPL-2.0 |
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2 | /* Kernel object name space definitions |
3 | * | |
4 | * Copyright (c) 2002-2003 Patrick Mochel | |
5 | * Copyright (c) 2002-2003 Open Source Development Labs | |
6 | * Copyright (c) 2006-2008 Greg Kroah-Hartman <greg@kroah.com> | |
7 | * Copyright (c) 2006-2008 Novell Inc. | |
8 | * | |
9 | * Split from kobject.h by David Howells (dhowells@redhat.com) | |
10 | * | |
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11 | * Please read Documentation/kobject.txt before using the kobject |
12 | * interface, ESPECIALLY the parts about reference counts and object | |
13 | * destructors. | |
14 | */ | |
15 | ||
16 | #ifndef _LINUX_KOBJECT_NS_H | |
17 | #define _LINUX_KOBJECT_NS_H | |
18 | ||
19 | struct sock; | |
20 | struct kobject; | |
21 | ||
22 | /* | |
23 | * Namespace types which are used to tag kobjects and sysfs entries. | |
24 | * Network namespace will likely be the first. | |
25 | */ | |
26 | enum kobj_ns_type { | |
27 | KOBJ_NS_TYPE_NONE = 0, | |
28 | KOBJ_NS_TYPE_NET, | |
29 | KOBJ_NS_TYPES | |
30 | }; | |
31 | ||
32 | /* | |
33 | * Callbacks so sysfs can determine namespaces | |
a685e089 | 34 | * @grab_current_ns: return a new reference to calling task's namespace |
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35 | * @netlink_ns: return namespace to which a sock belongs (right?) |
36 | * @initial_ns: return the initial namespace (i.e. init_net_ns) | |
a685e089 | 37 | * @drop_ns: drops a reference to namespace |
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38 | */ |
39 | struct kobj_ns_type_operations { | |
40 | enum kobj_ns_type type; | |
7dc5dbc8 | 41 | bool (*current_may_mount)(void); |
a685e089 | 42 | void *(*grab_current_ns)(void); |
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43 | const void *(*netlink_ns)(struct sock *sk); |
44 | const void *(*initial_ns)(void); | |
a685e089 | 45 | void (*drop_ns)(void *); |
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46 | }; |
47 | ||
48 | int kobj_ns_type_register(const struct kobj_ns_type_operations *ops); | |
49 | int kobj_ns_type_registered(enum kobj_ns_type type); | |
50 | const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent); | |
51 | const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj); | |
52 | ||
7dc5dbc8 | 53 | bool kobj_ns_current_may_mount(enum kobj_ns_type type); |
a685e089 | 54 | void *kobj_ns_grab_current(enum kobj_ns_type type); |
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55 | const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk); |
56 | const void *kobj_ns_initial(enum kobj_ns_type type); | |
a685e089 | 57 | void kobj_ns_drop(enum kobj_ns_type type, void *ns); |
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58 | |
59 | #endif /* _LINUX_KOBJECT_NS_H */ |