1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 Copyright 2015 Lennart Poettering
10 #include "cgroup-util.h"
11 #include "volatile-util.h"
13 typedef enum MountSettingsMask
{
14 MOUNT_FATAL
= 1 << 0, /* if set, a mount error is considered fatal */
15 MOUNT_USE_USERNS
= 1 << 1, /* if set, mounts are patched considering uid/gid shifts in a user namespace */
16 MOUNT_IN_USERNS
= 1 << 2, /* if set, the mount is executed in the inner child, otherwise in the outer child */
17 MOUNT_APPLY_APIVFS_RO
= 1 << 3, /* if set, /proc/sys, and /sys will be mounted read-only, otherwise read-write. */
18 MOUNT_APPLY_APIVFS_NETNS
= 1 << 4, /* if set, /proc/sys/net will be mounted read-write.
19 Works only if MOUNT_APPLY_APIVFS_RO is also set. */
20 MOUNT_INACCESSIBLE_REG
= 1 << 5, /* if set, create an inaccessible regular file first and use as bind mount source */
23 typedef enum CustomMountType
{
27 _CUSTOM_MOUNT_TYPE_MAX
,
28 _CUSTOM_MOUNT_TYPE_INVALID
= -1
31 typedef struct CustomMount
{
34 char *source
; /* for overlayfs this is the upper directory */
42 CustomMount
* custom_mount_add(CustomMount
**l
, size_t *n
, CustomMountType t
);
43 void custom_mount_free_all(CustomMount
*l
, size_t n
);
44 int custom_mount_prepare_all(const char *dest
, CustomMount
*l
, size_t n
);
46 int bind_mount_parse(CustomMount
**l
, size_t *n
, const char *s
, bool read_only
);
47 int tmpfs_mount_parse(CustomMount
**l
, size_t *n
, const char *s
);
48 int overlay_mount_parse(CustomMount
**l
, size_t *n
, const char *s
, bool read_only
);
50 int mount_all(const char *dest
, MountSettingsMask mount_settings
, uid_t uid_shift
, uid_t uid_range
, const char *selinux_apifs_context
);
51 int mount_sysfs(const char *dest
, MountSettingsMask mount_settings
);
53 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
);
54 int mount_systemd_cgroup_writable(const char *dest
, CGroupUnified unified_requested
);
56 int mount_custom(const char *dest
, CustomMount
*mounts
, size_t n
, bool userns
, uid_t uid_shift
, uid_t uid_range
, const char *selinux_apifs_context
);
58 int setup_volatile(const char *directory
, VolatileMode mode
, bool userns
, uid_t uid_shift
, uid_t uid_range
, const char *selinux_apifs_context
);
59 int setup_volatile_state(const char *directory
, VolatileMode mode
, bool userns
, uid_t uid_shift
, uid_t uid_range
, const char *selinux_apifs_context
);
61 int pivot_root_parse(char **pivot_root_new
, char **pivot_root_old
, const char *s
);
62 int setup_pivot_root(const char *directory
, const char *pivot_root_new
, const char *pivot_root_old
);