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: #3305

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

src/libs/Cargo.lock

@@ -89,7 +89,6 @@ dependencies = [
  "libc",
  "num-integer",
  "num-traits",
- "time",
  "winapi",
 ]
 
@@ -307,6 +306,10 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
 
+[[package]]
+name = "kata-sys-util"
+version = "0.1.0"
+
 [[package]]
 name = "kata-types"
 version = "0.1.0"
@@ -382,7 +385,7 @@ dependencies = [
  "log",
  "miow",
  "ntapi",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi",
  "winapi",
 ]
 
@@ -810,17 +813,6 @@ dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "time"
-version = "0.1.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
-dependencies = [
- "libc",
- "wasi 0.10.0+wasi-snapshot-preview1",
- "winapi",
-]
-
 [[package]]
 name = "tokio"
 version = "1.17.0"
@@ -938,12 +930,6 @@ dependencies = [
  "nix 0.23.1",
 ]
 
-[[package]]
-name = "wasi"
-version = "0.10.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
-
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"

src/libs/Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "logging",
     "kata-types",
+    "kata-sys-util",
     "safe-path",
     "protocols",
     "oci",

src/libs/README.md

@@ -7,5 +7,6 @@ Currently it provides following library crates:
 | Library | Description |
 |-|-|
 | [logging](logging/) | Facilities to setup logging subsystem based on slog. |
+| [system utilities](kata-sys-util/) | Collection of facilities and helpers to access system services. |
 | [types](kata-types/) | Collection of constants and data types shared by multiple Kata Containers components. |
 | [safe-path](safe-path/) | Utilities to safely resolve filesystem paths. |

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
+//