Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_NSTREE_H
3#define _LINUX_NSTREE_H
4
5#include <linux/ns_common.h>
6#include <linux/nsproxy.h>
7#include <linux/rbtree.h>
8#include <linux/seqlock.h>
9#include <linux/rculist.h>
10#include <linux/cookie.h>
11
12extern struct ns_tree cgroup_ns_tree;
13extern struct ns_tree ipc_ns_tree;
14extern struct ns_tree mnt_ns_tree;
15extern struct ns_tree net_ns_tree;
16extern struct ns_tree pid_ns_tree;
17extern struct ns_tree time_ns_tree;
18extern struct ns_tree user_ns_tree;
19extern struct ns_tree uts_ns_tree;
20
21#define to_ns_tree(__ns) \
22 _Generic((__ns), \
23 struct cgroup_namespace *: &(cgroup_ns_tree), \
24 struct ipc_namespace *: &(ipc_ns_tree), \
25 struct net *: &(net_ns_tree), \
26 struct pid_namespace *: &(pid_ns_tree), \
27 struct mnt_namespace *: &(mnt_ns_tree), \
28 struct time_namespace *: &(time_ns_tree), \
29 struct user_namespace *: &(user_ns_tree), \
30 struct uts_namespace *: &(uts_ns_tree))
31
32u64 ns_tree_gen_id(struct ns_common *ns);
33void __ns_tree_add_raw(struct ns_common *ns, struct ns_tree *ns_tree);
34void __ns_tree_remove(struct ns_common *ns, struct ns_tree *ns_tree);
35struct ns_common *ns_tree_lookup_rcu(u64 ns_id, int ns_type);
36struct ns_common *__ns_tree_adjoined_rcu(struct ns_common *ns,
37 struct ns_tree *ns_tree,
38 bool previous);
39
40static inline void __ns_tree_add(struct ns_common *ns, struct ns_tree *ns_tree)
41{
42 ns_tree_gen_id(ns);
43 __ns_tree_add_raw(ns, ns_tree);
44}
45
46/**
47 * ns_tree_add_raw - Add a namespace to a namespace
48 * @ns: Namespace to add
49 *
50 * This function adds a namespace to the appropriate namespace tree
51 * without assigning a id.
52 */
53#define ns_tree_add_raw(__ns) __ns_tree_add_raw(to_ns_common(__ns), to_ns_tree(__ns))
54
55/**
56 * ns_tree_add - Add a namespace to a namespace tree
57 * @ns: Namespace to add
58 *
59 * This function assigns a new id to the namespace and adds it to the
60 * appropriate namespace tree and list.
61 */
62#define ns_tree_add(__ns) __ns_tree_add(to_ns_common(__ns), to_ns_tree(__ns))
63
64/**
65 * ns_tree_remove - Remove a namespace from a namespace tree
66 * @ns: Namespace to remove
67 *
68 * This function removes a namespace from the appropriate namespace
69 * tree and list.
70 */
71#define ns_tree_remove(__ns) __ns_tree_remove(to_ns_common(__ns), to_ns_tree(__ns))
72
73#define ns_tree_adjoined_rcu(__ns, __previous) \
74 __ns_tree_adjoined_rcu(to_ns_common(__ns), to_ns_tree(__ns), __previous)
75
76#define ns_tree_active(__ns) (!RB_EMPTY_NODE(&to_ns_common(__ns)->ns_tree_node))
77
78#endif /* _LINUX_NSTREE_H */