Adding upstream version 252.22.upstream/252.22upstream

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

1 files changed, 184 insertions, 0 deletions

diff --git a/src/core/namespace.h b/src/core/namespace.h
new file mode 100644
index 0000000..2ba5970
--- /dev/null
+++ b/src/core/namespace.h
@@ -0,0 +1,184 @@
+/* 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 "namespace-util.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 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);