/* 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 */