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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
/***
Copyright © 2016 Djalal Harouni
***/
typedef struct NamespaceInfo NamespaceInfo;
typedef struct BindMount BindMount;
typedef struct TemporaryFileSystem TemporaryFileSystem;
typedef struct MountImage MountImage;
#include <stdbool.h>
#include "dissect-image.h"
#include "fs-util.h"
#include "macro.h"
#include "string-util.h"
typedef enum ProtectHome {
PROTECT_HOME_NO,
PROTECT_HOME_YES,
PROTECT_HOME_READ_ONLY,
PROTECT_HOME_TMPFS,
_PROTECT_HOME_MAX,
_PROTECT_HOME_INVALID = -EINVAL,
} ProtectHome;
typedef enum NamespaceType {
NAMESPACE_MOUNT,
NAMESPACE_CGROUP,
NAMESPACE_UTS,
NAMESPACE_IPC,
NAMESPACE_USER,
NAMESPACE_PID,
NAMESPACE_NET,
_NAMESPACE_TYPE_MAX,
_NAMESPACE_TYPE_INVALID = -EINVAL,
} NamespaceType;
typedef enum ProtectSystem {
PROTECT_SYSTEM_NO,
PROTECT_SYSTEM_YES,
PROTECT_SYSTEM_FULL,
PROTECT_SYSTEM_STRICT,
_PROTECT_SYSTEM_MAX,
_PROTECT_SYSTEM_INVALID = -EINVAL,
} ProtectSystem;
typedef enum ProtectProc {
PROTECT_PROC_DEFAULT,
PROTECT_PROC_NOACCESS, /* hidepid=noaccess */
PROTECT_PROC_INVISIBLE, /* hidepid=invisible */
PROTECT_PROC_PTRACEABLE, /* hidepid=ptraceable */
_PROTECT_PROC_MAX,
_PROTECT_PROC_INVALID = -EINVAL,
} ProtectProc;
typedef enum ProcSubset {
PROC_SUBSET_ALL,
PROC_SUBSET_PID, /* subset=pid */
_PROC_SUBSET_MAX,
_PROC_SUBSET_INVALID = -EINVAL,
} ProcSubset;
struct NamespaceInfo {
bool ignore_protect_paths;
bool private_dev;
bool private_mounts;
bool protect_control_groups;
bool protect_kernel_tunables;
bool protect_kernel_modules;
bool protect_kernel_logs;
bool mount_apivfs;
bool protect_hostname;
bool private_ipc;
bool mount_nosuid;
ProtectHome protect_home;
ProtectSystem protect_system;
ProtectProc protect_proc;
ProcSubset proc_subset;
};
struct BindMount {
char *source;
char *destination;
bool read_only;
bool nosuid;
bool recursive;
bool ignore_enoent;
};
struct TemporaryFileSystem {
char *path;
char *options;
};
typedef enum MountImageType {
MOUNT_IMAGE_DISCRETE,
MOUNT_IMAGE_EXTENSION,
_MOUNT_IMAGE_TYPE_MAX,
_MOUNT_IMAGE_TYPE_INVALID = -EINVAL,
} MountImageType;
struct MountImage {
char *source;
char *destination; /* Unused if MountImageType == MOUNT_IMAGE_EXTENSION */
LIST_HEAD(MountOptions, mount_options);
bool ignore_enoent;
MountImageType type;
};
int setup_namespace(
const char *root_directory,
const char *root_image,
const MountOptions *root_image_options,
const NamespaceInfo *ns_info,
char **read_write_paths,
char **read_only_paths,
char **inaccessible_paths,
char **exec_paths,
char **no_exec_paths,
char **empty_directories,
char **exec_dir_symlinks,
const BindMount *bind_mounts,
size_t n_bind_mounts,
const TemporaryFileSystem *temporary_filesystems,
size_t n_temporary_filesystems,
const MountImage *mount_images,
size_t n_mount_images,
const char *tmp_dir,
const char *var_tmp_dir,
const char *creds_path,
const char *log_namespace,
unsigned long mount_flags,
const void *root_hash,
size_t root_hash_size,
const char *root_hash_path,
const void *root_hash_sig,
size_t root_hash_sig_size,
const char *root_hash_sig_path,
const char *root_verity,
const MountImage *extension_images,
size_t n_extension_images,
char **extension_directories,
const char *propagate_dir,
const char *incoming_dir,
const char *extension_dir,
const char *notify_socket,
char **error_path);
#define RUN_SYSTEMD_EMPTY "/run/systemd/empty"
static inline char* namespace_cleanup_tmpdir(char *p) {
PROTECT_ERRNO;
if (!streq_ptr(p, RUN_SYSTEMD_EMPTY))
(void) rmdir(p);
return mfree(p);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(char*, namespace_cleanup_tmpdir);
int setup_tmp_dirs(
const char *id,
char **tmp_dir,
char **var_tmp_dir);
int setup_shareable_ns(const int ns_storage_socket[static 2], unsigned long nsflag);
int open_shareable_ns_path(const int netns_storage_socket[static 2], const char *path, unsigned long nsflag);
const char* protect_home_to_string(ProtectHome p) _const_;
ProtectHome protect_home_from_string(const char *s) _pure_;
const char* protect_system_to_string(ProtectSystem p) _const_;
ProtectSystem protect_system_from_string(const char *s) _pure_;
const char* protect_proc_to_string(ProtectProc i) _const_;
ProtectProc protect_proc_from_string(const char *s) _pure_;
const char* proc_subset_to_string(ProcSubset i) _const_;
ProcSubset proc_subset_from_string(const char *s) _pure_;
void bind_mount_free_many(BindMount *b, size_t n);
int bind_mount_add(BindMount **b, size_t *n, const BindMount *item);
void temporary_filesystem_free_many(TemporaryFileSystem *t, size_t n);
int temporary_filesystem_add(TemporaryFileSystem **t, size_t *n,
const char *path, const char *options);
MountImage* mount_image_free_many(MountImage *m, size_t *n);
int mount_image_add(MountImage **m, size_t *n, const MountImage *item);
const char* namespace_type_to_string(NamespaceType t) _const_;
NamespaceType namespace_type_from_string(const char *s) _pure_;
bool ns_type_supported(NamespaceType type);
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