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authorDavid Howells <dhowells@redhat.com>2010-08-11 10:01:02 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-23 21:12:46 -0400
commit8488a38f4d2f43bd55a3e0db4cd57a5bef3af6d6 (patch)
tree104acb0de25090fa4982c24799c2d3d414b9b192 /include/linux
parent9ee47476d6734c9deb9ae9ab05d963302f6b6150 (diff)
kobject: Break the kobject namespace defs into their own header
Break the kobject namespace defs into their own header to avoid a header file inclusion ordering problem between linux/sysfs.h and linux/kobject.h. This fixes the build breakage on older versions of gcc. Signed-off-by: David Howells <dhowells@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/kobject.h35
-rw-r--r--include/linux/kobject_ns.h56
-rw-r--r--include/linux/sysfs.h1
3 files changed, 58 insertions, 34 deletions
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index cf343a852534..7950a37a7146 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -22,6 +22,7 @@
22#include <linux/compiler.h> 22#include <linux/compiler.h>
23#include <linux/spinlock.h> 23#include <linux/spinlock.h>
24#include <linux/kref.h> 24#include <linux/kref.h>
25#include <linux/kobject_ns.h>
25#include <linux/kernel.h> 26#include <linux/kernel.h>
26#include <linux/wait.h> 27#include <linux/wait.h>
27#include <asm/atomic.h> 28#include <asm/atomic.h>
@@ -136,42 +137,8 @@ struct kobj_attribute {
136 137
137extern const struct sysfs_ops kobj_sysfs_ops; 138extern const struct sysfs_ops kobj_sysfs_ops;
138 139
139/*
140 * Namespace types which are used to tag kobjects and sysfs entries.
141 * Network namespace will likely be the first.
142 */
143enum kobj_ns_type {
144 KOBJ_NS_TYPE_NONE = 0,
145 KOBJ_NS_TYPE_NET,
146 KOBJ_NS_TYPES
147};
148
149struct sock; 140struct sock;
150 141
151/*
152 * Callbacks so sysfs can determine namespaces
153 * @current_ns: return calling task's namespace
154 * @netlink_ns: return namespace to which a sock belongs (right?)
155 * @initial_ns: return the initial namespace (i.e. init_net_ns)
156 */
157struct kobj_ns_type_operations {
158 enum kobj_ns_type type;
159 const void *(*current_ns)(void);
160 const void *(*netlink_ns)(struct sock *sk);
161 const void *(*initial_ns)(void);
162};
163
164int kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
165int kobj_ns_type_registered(enum kobj_ns_type type);
166const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent);
167const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
168
169const void *kobj_ns_current(enum kobj_ns_type type);
170const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk);
171const void *kobj_ns_initial(enum kobj_ns_type type);
172void kobj_ns_exit(enum kobj_ns_type type, const void *ns);
173
174
175/** 142/**
176 * struct kset - a set of kobjects of a specific type, belonging to a specific subsystem. 143 * struct kset - a set of kobjects of a specific type, belonging to a specific subsystem.
177 * 144 *
diff --git a/include/linux/kobject_ns.h b/include/linux/kobject_ns.h
new file mode 100644
index 000000000000..82cb5bf461fb
--- /dev/null
+++ b/include/linux/kobject_ns.h
@@ -0,0 +1,56 @@
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
20struct sock;
21struct kobject;
22
23/*
24 * Namespace types which are used to tag kobjects and sysfs entries.
25 * Network namespace will likely be the first.
26 */
27enum 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 * @current_ns: return 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 */
39struct kobj_ns_type_operations {
40 enum kobj_ns_type type;
41 const void *(*current_ns)(void);
42 const void *(*netlink_ns)(struct sock *sk);
43 const void *(*initial_ns)(void);
44};
45
46int kobj_ns_type_register(const struct kobj_ns_type_operations *ops);
47int kobj_ns_type_registered(enum kobj_ns_type type);
48const struct kobj_ns_type_operations *kobj_child_ns_ops(struct kobject *parent);
49const struct kobj_ns_type_operations *kobj_ns_ops(struct kobject *kobj);
50
51const void *kobj_ns_current(enum kobj_ns_type type);
52const void *kobj_ns_netlink(enum kobj_ns_type type, struct sock *sk);
53const void *kobj_ns_initial(enum kobj_ns_type type);
54void kobj_ns_exit(enum kobj_ns_type type, const void *ns);
55
56#endif /* _LINUX_KOBJECT_NS_H */
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 3c92121ba9af..96eb576d82fd 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -16,6 +16,7 @@
16#include <linux/errno.h> 16#include <linux/errno.h>
17#include <linux/list.h> 17#include <linux/list.h>
18#include <linux/lockdep.h> 18#include <linux/lockdep.h>
19#include <linux/kobject_ns.h>
19#include <asm/atomic.h> 20#include <asm/atomic.h>
20 21
21struct kobject; 22struct kobject;