/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __IDMAP_UTILS_H#define __IDMAP_UTILS_H #ifndef _GNU_SOURCE#define _GNU_SOURCE#endif#include <errno.h>#include <linux/types.h>#include <sched.h>#include <signal.h>#include <stdbool.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <syscall.h>#include <sys/capability.h>#include <sys/fsuid.h>#include <sys/types.h>#include <unistd.h> extern int get_userns_fd(unsigned long nsid, unsigned long hostid,			 unsigned long range); extern int caps_down(void);extern int cap_down(cap_value_t down); extern bool switch_ids(uid_t uid, gid_t gid);extern int setup_userns(void);extern int enter_userns(void); static inline bool switch_userns(int fd, uid_t uid, gid_t gid, bool drop_caps){	if (setns(fd, CLONE_NEWUSER))		return false; 	if (!switch_ids(uid, gid))		return false; 	if (drop_caps && !caps_down())		return false; 	return true;} extern int wait_for_pid(pid_t pid);extern int write_file(const char *path, const char *val);extern uint64_t get_unique_mnt_id(const char *path); #endif /* __IDMAP_UTILS_H */