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#pragma once
/***
This file is part of systemd.
Copyright 2015 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdbool.h>
#include "cgroup-util.h"
typedef enum MountSettingsMask {
MOUNT_FATAL = 1 << 0, /* if set, a mount error is considered fatal */
MOUNT_USE_USERNS = 1 << 1, /* if set, mounts are patched considering uid/gid shifts in a user namespace */
MOUNT_IN_USERNS = 1 << 2, /* if set, the mount is executed in the inner child, otherwise in the outer child */
MOUNT_APPLY_APIVFS_RO = 1 << 3, /* if set, /proc/sys, and /sysfs will be mounted read-only, otherwise read-write. */
MOUNT_APPLY_APIVFS_NETNS = 1 << 4, /* if set, /proc/sys/net will be mounted read-write.
Works only if MOUNT_APPLY_APIVFS_RO is also set. */
} MountSettingsMask;
typedef enum VolatileMode {
VOLATILE_NO,
VOLATILE_YES,
VOLATILE_STATE,
_VOLATILE_MODE_MAX,
_VOLATILE_MODE_INVALID = -1
} VolatileMode;
typedef enum CustomMountType {
CUSTOM_MOUNT_BIND,
CUSTOM_MOUNT_TMPFS,
CUSTOM_MOUNT_OVERLAY,
_CUSTOM_MOUNT_TYPE_MAX,
_CUSTOM_MOUNT_TYPE_INVALID = -1
} CustomMountType;
typedef struct CustomMount {
CustomMountType type;
bool read_only;
char *source; /* for overlayfs this is the upper directory */
char *destination;
char *options;
char *work_dir;
char **lower;
} CustomMount;
CustomMount* custom_mount_add(CustomMount **l, unsigned *n, CustomMountType t);
void custom_mount_free_all(CustomMount *l, unsigned n);
int bind_mount_parse(CustomMount **l, unsigned *n, const char *s, bool read_only);
int tmpfs_mount_parse(CustomMount **l, unsigned *n, const char *s);
int custom_mount_compare(const void *a, const void *b);
int mount_all(const char *dest, MountSettingsMask mount_settings, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context);
int mount_sysfs(const char *dest, MountSettingsMask mount_settings);
int mount_cgroups(const char *dest, CGroupUnified unified_requested, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context, bool use_cgns);
int mount_systemd_cgroup_writable(const char *dest, CGroupUnified unified_requested);
int mount_custom(const char *dest, CustomMount *mounts, unsigned n, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context);
int setup_volatile(const char *directory, VolatileMode mode, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context);
int setup_volatile_state(const char *directory, VolatileMode mode, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context);
VolatileMode volatile_mode_from_string(const char *s);
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