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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2025 Christian Brauner <brauner@kernel.org> */
#ifndef _LINUX_NSFS_H
#define _LINUX_NSFS_H
#include <linux/ns_common.h>
#include <linux/cred.h>
#include <linux/pid_namespace.h>
struct path;
struct task_struct;
struct proc_ns_operations;
int ns_get_path(struct path *path, struct task_struct *task,
const struct proc_ns_operations *ns_ops);
typedef struct ns_common *ns_get_path_helper_t(void *);
int ns_get_path_cb(struct path *path, ns_get_path_helper_t ns_get_cb,
void *private_data);
bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino);
int ns_get_name(char *buf, size_t size, struct task_struct *task,
const struct proc_ns_operations *ns_ops);
void nsfs_init(void);
#define __current_namespace_from_type(__ns) \
_Generic((__ns), \
struct cgroup_namespace *: current->nsproxy->cgroup_ns, \
struct ipc_namespace *: current->nsproxy->ipc_ns, \
struct net *: current->nsproxy->net_ns, \
struct pid_namespace *: task_active_pid_ns(current), \
struct mnt_namespace *: current->nsproxy->mnt_ns, \
struct time_namespace *: current->nsproxy->time_ns, \
struct user_namespace *: current_user_ns(), \
struct uts_namespace *: current->nsproxy->uts_ns)
#define current_in_namespace(__ns) (__current_namespace_from_type(__ns) == __ns)
#endif /* _LINUX_NSFS_H */
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