| // SPDX-License-Identifier: GPL-2.0 |
| /* 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) |
| * |
| * Please read Documentation/core-api/kobject.rst 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 */ |