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-rw-r--r--src/nspawn/nspawn-mount.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/src/nspawn/nspawn-mount.h b/src/nspawn/nspawn-mount.h
new file mode 100644
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--- /dev/null
+++ b/src/nspawn/nspawn-mount.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <stdbool.h>
+
+#include "cgroup-util.h"
+#include "volatile-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 /sys 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. */
+ MOUNT_APPLY_TMPFS_TMP = 1 << 5, /* if set, /tmp will be mounted as tmpfs */
+ MOUNT_ROOT_ONLY = 1 << 6, /* if set, only root mounts are mounted */
+ MOUNT_NON_ROOT_ONLY = 1 << 7, /* if set, only non-root mounts are mounted */
+ MOUNT_MKDIR = 1 << 8, /* if set, make directory to mount over first */
+ MOUNT_TOUCH = 1 << 9, /* if set, touch file to mount over first */
+ MOUNT_PREFIX_ROOT = 1 << 10,/* if set, prefix the source path with the container's root directory */
+ MOUNT_FOLLOW_SYMLINKS = 1 << 11,/* if set, we'll follow symlinks for the mount target */
+} MountSettingsMask;
+
+typedef enum CustomMountType {
+ CUSTOM_MOUNT_BIND,
+ CUSTOM_MOUNT_TMPFS,
+ CUSTOM_MOUNT_OVERLAY,
+ CUSTOM_MOUNT_INACCESSIBLE,
+ CUSTOM_MOUNT_ARBITRARY,
+ _CUSTOM_MOUNT_TYPE_MAX,
+ _CUSTOM_MOUNT_TYPE_INVALID = -EINVAL,
+} 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;
+ char *rm_rf_tmpdir;
+ char *type_argument; /* only for CUSTOM_MOUNT_ARBITRARY */
+ bool graceful;
+ bool in_userns;
+} CustomMount;
+
+CustomMount* custom_mount_add(CustomMount **l, size_t *n, CustomMountType t);
+void custom_mount_free_all(CustomMount *l, size_t n);
+int custom_mount_prepare_all(const char *dest, CustomMount *l, size_t n);
+
+int bind_mount_parse(CustomMount **l, size_t *n, const char *s, bool read_only);
+int tmpfs_mount_parse(CustomMount **l, size_t *n, const char *s);
+int overlay_mount_parse(CustomMount **l, size_t *n, const char *s, bool read_only);
+int inaccessible_mount_parse(CustomMount **l, size_t *n, const char *s);
+
+int mount_all(const char *dest, MountSettingsMask mount_settings, uid_t uid_shift, const char *selinux_apifs_context);
+int mount_sysfs(const char *dest, MountSettingsMask mount_settings);
+
+int mount_custom(const char *dest, CustomMount *mounts, size_t n, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context, MountSettingsMask mount_settings);
+bool has_custom_root_mount(const CustomMount *mounts, size_t n);
+
+int setup_volatile_mode(const char *directory, VolatileMode mode, uid_t uid_shift, const char *selinux_apifs_context);
+
+int pivot_root_parse(char **pivot_root_new, char **pivot_root_old, const char *s);
+int setup_pivot_root(const char *directory, const char *pivot_root_new, const char *pivot_root_old);
+
+int tmpfs_patch_options(const char *options,uid_t uid_shift, const char *selinux_apifs_context, char **ret);