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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NSTREE_H
#define _LINUX_NSTREE_H
#include <linux/ns_common.h>
#include <linux/nsproxy.h>
#include <linux/rbtree.h>
#include <linux/seqlock.h>
#include <linux/rculist.h>
#include <linux/cookie.h>
extern struct ns_tree cgroup_ns_tree;
extern struct ns_tree ipc_ns_tree;
extern struct ns_tree mnt_ns_tree;
extern struct ns_tree net_ns_tree;
extern struct ns_tree pid_ns_tree;
extern struct ns_tree time_ns_tree;
extern struct ns_tree user_ns_tree;
extern struct ns_tree uts_ns_tree;
#define to_ns_tree(__ns) \
_Generic((__ns), \
struct cgroup_namespace *: &(cgroup_ns_tree), \
struct ipc_namespace *: &(ipc_ns_tree), \
struct net *: &(net_ns_tree), \
struct pid_namespace *: &(pid_ns_tree), \
struct mnt_namespace *: &(mnt_ns_tree), \
struct time_namespace *: &(time_ns_tree), \
struct user_namespace *: &(user_ns_tree), \
struct uts_namespace *: &(uts_ns_tree))
u64 ns_tree_gen_id(struct ns_common *ns);
void __ns_tree_add_raw(struct ns_common *ns, struct ns_tree *ns_tree);
void __ns_tree_remove(struct ns_common *ns, struct ns_tree *ns_tree);
struct ns_common *ns_tree_lookup_rcu(u64 ns_id, int ns_type);
struct ns_common *__ns_tree_adjoined_rcu(struct ns_common *ns,
struct ns_tree *ns_tree,
bool previous);
static inline void __ns_tree_add(struct ns_common *ns, struct ns_tree *ns_tree)
{
ns_tree_gen_id(ns);
__ns_tree_add_raw(ns, ns_tree);
}
/**
* ns_tree_add_raw - Add a namespace to a namespace
* @ns: Namespace to add
*
* This function adds a namespace to the appropriate namespace tree
* without assigning a id.
*/
#define ns_tree_add_raw(__ns) __ns_tree_add_raw(to_ns_common(__ns), to_ns_tree(__ns))
/**
* ns_tree_add - Add a namespace to a namespace tree
* @ns: Namespace to add
*
* This function assigns a new id to the namespace and adds it to the
* appropriate namespace tree and list.
*/
#define ns_tree_add(__ns) __ns_tree_add(to_ns_common(__ns), to_ns_tree(__ns))
/**
* ns_tree_remove - Remove a namespace from a namespace tree
* @ns: Namespace to remove
*
* This function removes a namespace from the appropriate namespace
* tree and list.
*/
#define ns_tree_remove(__ns) __ns_tree_remove(to_ns_common(__ns), to_ns_tree(__ns))
#define ns_tree_adjoined_rcu(__ns, __previous) \
__ns_tree_adjoined_rcu(to_ns_common(__ns), to_ns_tree(__ns), __previous)
#define ns_tree_active(__ns) (!RB_EMPTY_NODE(&to_ns_common(__ns)->ns_tree_node))
#endif /* _LINUX_NSTREE_H */
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