libs/sys-util: add kata-sys-util crate under src/libs

The kata-sys-util crate is a collection of modules that provides helpers
and utilities used by multiple Kata Containers components.

Fixes: kata-containers#3305

Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>

src/libs/Cargo.toml

@@ -2,5 +2,6 @@
 members = [
     "logging",
     "kata-types",
+    "kata-sys-util",
 ]
 resolver = "2"

src/libs/README.md

@@ -7,4 +7,5 @@ Currently it provides following library crates:
 | Library | Description |
 |-|-|-|
 | [logging](logging/) | Facilities to setup logging subsystem based slog. |
+| [system utilities](kata-sys-util/) | A collection of facilities and helpers to access system services. |
 | [types](kata-types/) | A collection of constants and data types shared by multiple Kata components. |

src/libs/kata-sys-util/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "kata-sys-util"
+version = "0.1.0"
+description = "System Utilities for Kata Containers"
+keywords = ["kata", "container", "runtime"]
+authors = ["The Kata Containers community <kata-dev@lists.katacontainers.io>"]
+repository = "https://github.com/kata-containers/kata-containers.git"
+homepage = "https://katacontainers.io/"
+readme = "README.md"
+license = "Apache-2.0"
+edition = "2018"
+
+[dependencies]

src/libs/kata-sys-util/README.md

@@ -0,0 +1,19 @@
+# kata-sys-util
+
+This crate is a collection of utilities and helpers for 
+[Kata Containers](https://github.com/kata-containers/kata-containers/) components to access system services.
+
+It provides safe wrappers over system services, such as:
+- cgroups
+- file systems
+- mount
+- NUMA
+
+## Support
+
+**Operating Systems**:
+- Linux
+
+## License
+
+This code is licensed under [Apache-2.0](../../../LICENSE).

src/libs/kata-sys-util/src/lib.rs

@@ -0,0 +1,4 @@
+// Copyright (c) 2021 Alibaba Cloud
+//
+// SPDX-License-Identifier: Apache-2.0
+//