/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#define USER_NAMESPACE_CGROUPS_DELEGATE_MAX 16

typedef struct UserNamespaceInfo {
        uid_t owner;
        char *name;
        uint64_t userns_inode;
        uid_t start;
        uint32_t size;
        uid_t target;
        uint64_t *cgroups;
        size_t n_cgroups;
} UserNamespaceInfo;

UserNamespaceInfo* userns_info_new(void);
UserNamespaceInfo* userns_info_free(UserNamespaceInfo *userns);

DEFINE_TRIVIAL_CLEANUP_FUNC(UserNamespaceInfo*, userns_info_free);

bool userns_info_has_cgroup(UserNamespaceInfo *userns, uint64_t cgroup_id);
int userns_info_add_cgroup(UserNamespaceInfo *userns, uint64_t cgroup_id);
int userns_info_remove_cgroups(UserNamespaceInfo *userns);

bool userns_name_is_valid(const char *name);

int userns_registry_open_fd(void);
int userns_registry_lock(int dir_fd);

int userns_registry_load_by_start_uid(int dir_fd, uid_t start, UserNamespaceInfo **ret);
int userns_registry_load_by_userns_inode(int dir_fd, uint64_t userns, UserNamespaceInfo **ret);
int userns_registry_load_by_name(int dir_fd, const char *name, UserNamespaceInfo **ret);

int userns_registry_store(int dir_fd, UserNamespaceInfo *info);
int userns_registry_remove(int dir_fd, UserNamespaceInfo *info);

int userns_registry_inode_exists(int dir_fd, uint64_t inode);
int userns_registry_name_exists(int dir_fd, const char *name);
int userns_registry_uid_exists(int dir_fd, uid_t start);

int userns_registry_per_uid(int dir_fd, uid_t owner);