Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/src/nspawn/nspawn-mount.h b/src/nspawn/nspawn-mount.h
new file mode 100644
index 0000000..bf5e47d
--- /dev/null
+++ b/src/nspawn/nspawn-mount.h
@@ -0,0 +1,71 @@
+/* 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);
+int pin_fully_visible_fs(void);
+int wipe_fully_visible_fs(int mntns_fd);