Greg Kroah-Hartman | d9d16e1 | 2017-11-07 17:30:05 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 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 | * |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 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 |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 34 | * @grab_current_ns: return a new reference to calling task's namespace |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 35 | * @netlink_ns: return namespace to which a sock belongs (right?) |
| 36 | * @initial_ns: return the initial namespace (i.e. init_net_ns) |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 37 | * @drop_ns: drops a reference to namespace |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 38 | */ |
| 39 | struct kobj_ns_type_operations { |
| 40 | enum kobj_ns_type type; |
Eric W. Biederman | 7dc5dbc | 2013-03-25 20:07:01 -0700 | [diff] [blame] | 41 | bool (*current_may_mount)(void); |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 42 | void *(*grab_current_ns)(void); |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 43 | const void *(*netlink_ns)(struct sock *sk); |
| 44 | const void *(*initial_ns)(void); |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 45 | void (*drop_ns)(void *); |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 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 | |
Eric W. Biederman | 7dc5dbc | 2013-03-25 20:07:01 -0700 | [diff] [blame] | 53 | bool kobj_ns_current_may_mount(enum kobj_ns_type type); |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 54 | void *kobj_ns_grab_current(enum kobj_ns_type type); |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 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); |
Al Viro | a685e08 | 2011-06-08 21:13:01 -0400 | [diff] [blame] | 57 | void kobj_ns_drop(enum kobj_ns_type type, void *ns); |
David Howells | 8488a38 | 2010-08-11 15:01:02 +0100 | [diff] [blame] | 58 | |
| 59 | #endif /* _LINUX_KOBJECT_NS_H */ |