CCv0: Merge main into CCv0 branch

Merge remote-tracking branch 'upstream/main' into CCv0

Fixes: #3807
Signed-off-by: stevenhorsman <steven@uk.ibm.com>

.github/workflows/darwin-tests.yaml

@@ -0,0 +1,25 @@
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - reopened
+      - synchronize
+
+name: Darwin tests
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.16.x, 1.17.x]
+        os: [macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Build utils
+      run: ./ci/darwin-test.sh

CONTRIBUTING.md

@@ -2,4 +2,4 @@
 
 ## This repo is part of [Kata Containers](https://katacontainers.io)
 
-For details on how to contribute to the Kata Containers project, please see the main [contributing document](https://github.com/kata-containers/community/blob/master/CONTRIBUTING.md).
+For details on how to contribute to the Kata Containers project, please see the main [contributing document](https://github.com/kata-containers/community/blob/main/CONTRIBUTING.md).

ci/darwin-test.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2022 Apple Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+set -e
+
+cidir=$(dirname "$0")
+runtimedir=$cidir/../src/runtime
+
+build_working_packages() {
+	# working packages:
+	device_api=$runtimedir/virtcontainers/device/api
+	device_config=$runtimedir/virtcontainers/device/config
+	device_drivers=$runtimedir/virtcontainers/device/drivers
+	device_manager=$runtimedir/virtcontainers/device/manager
+	rc_pkg_dir=$runtimedir/pkg/resourcecontrol/
+	utils_pkg_dir=$runtimedir/virtcontainers/utils
+
+	# broken packages :( :
+	#katautils=$runtimedir/pkg/katautils
+	#oci=$runtimedir/pkg/oci
+	#vc=$runtimedir/virtcontainers
+
+	pkgs=(
+		"$device_api"
+		"$device_config"
+		"$device_drivers"
+		"$device_manager"
+		"$utils_pkg_dir"
+		"$rc_pkg_dir")
+	for pkg in "${pkgs[@]}"; do
+		echo building "$pkg"
+		pushd "$pkg" &>/dev/null
+		go build
+		go test
+		popd &>/dev/null
+	done
+}
+
+build_working_packages

docs/Developer-Guide.md

@@ -212,11 +212,13 @@ $ sudo systemctl restart systemd-journald
 >
 > - You should only do this step if you are testing with the latest version of the agent.
 
-The rust-agent is built with a static linked `musl.` To configure this:
+The agent is built with a statically linked `musl.` The default `libc` used is `musl`, but on `ppc64le` and `s390x`, `gnu` should be used. To configure this:
 
 ```
-rustup target add x86_64-unknown-linux-musl
-sudo ln -s /usr/bin/g++ /bin/musl-g++
+$ export ARCH=$(uname -m)
+$ if [ "$ARCH" = "ppc64le" -o "$ARCH" = "s390x" ]; then export LIBC=gnu; else export LIBC=musl; fi
+$ [ ${ARCH} == "ppc64le" ] && export ARCH=powerpc64le
+$ rustup target add ${ARCH}-unknown-linux-${LIBC}
 ```
 
 To build the agent:

docs/README.md

@@ -21,9 +21,9 @@ See the [tracing documentation](tracing.md).
 * [Limitations](Limitations.md): differences and limitations compared with the default [Docker](https://www.docker.com/) runtime,
 [`runc`](https://github.com/opencontainers/runc).
 
-### Howto guides
+### How-to guides
 
-See the [howto documentation](how-to).
+See the [how-to documentation](how-to).
 
 ## Kata Use-Cases
 
@@ -48,7 +48,7 @@ Documents that help to understand and contribute to Kata Containers.
 ### How to Contribute
 
 * [Developer Guide](Developer-Guide.md): Setup the Kata Containers developing environments
-* [How to contribute to Kata Containers](https://github.com/kata-containers/community/blob/master/CONTRIBUTING.md)
+* [How to contribute to Kata Containers](https://github.com/kata-containers/community/blob/main/CONTRIBUTING.md)
 * [Code of Conduct](../CODE_OF_CONDUCT.md)
 
 ## Help Writing a Code PR
@@ -58,6 +58,7 @@ Documents that help to understand and contribute to Kata Containers.
 ## Help Writing Unit Tests
 
 * [Unit Test Advice](Unit-Test-Advice.md)
+* [Unit testing presentation](presentations/unit-testing/kata-containers-unit-testing.md)
 
 ## Help Improving the Documents
 
@@ -72,6 +73,10 @@ Documents that help to understand and contribute to Kata Containers.
 * [Release strategy](Stable-Branch-Strategy.md)
 * [Release Process](Release-Process.md)
 
+## Presentations
+
+* [Presentations](presentations)
+
 ## Website Changes
 
 If you have a suggestion for how we can improve the

docs/presentations/README.md

@@ -0,0 +1,3 @@
+# Kata Containers presentations
+
+* [Unit testing](unit-testing)

docs/presentations/unit-testing/README.md

@@ -0,0 +1,14 @@
+# Kata Containers unit testing presentation
+
+## Markdown version
+
+See [the Kata Containers unit testing presentation](kata-containers-unit-testing.md).
+
+### To view as an HTML presentation
+
+```bash
+$ infile="kata-containers-unit-testing.md"
+$ outfile="/tmp/kata-containers-unit-testing.html"
+$ pandoc -s --metadata title="Kata Containers unit testing" -f markdown -t revealjs --highlight-style="zenburn" -i -o "$outfile" "$infile"
+$ xdg-open "file://$outfile"
+```

docs/presentations/unit-testing/kata-containers-unit-testing.md

@@ -0,0 +1,335 @@
+## Why write unit tests?
+
+- Catch regressions
+
+- Improve the code being tested
+
+  Structure, quality, security, performance, "shakes out" implicit
+  assumptions, _etc_
+
+- Extremely instructive
+
+  Once you've fully tested a single function, you'll understand that
+  code very well indeed.
+
+## Why write unit tests? (continued)
+
+- Fun!
+
+  Yes, really! Don't believe me? Try it! ;)
+
+## Run all Kata Containers agent unit tests
+
+As an example, to run all agent unit tests:
+
+```bash
+$ cd $GOPATH/src/github.com/kata-containers/kata-containers
+$ cd src/agent
+$ make test
+```
+
+## List all unit tests
+
+- Identify the full name of all the tests _in the current package_:
+
+  ```bash
+  $ cargo test -- --list
+  ```
+
+- Identify the full name of all tests in the `foo` "local crate"
+  (sub-directory containing another `Cargo.toml` file):
+
+  ```bash
+  $ cargo test -p "foo" -- --list
+  ```
+
+## Run a single unit test
+
+- Run a test in the current package in verbose mode:
+
+  ```bash
+  # Example 
+  $ test="config::tests::test_get_log_level"
+
+  $ cargo test "$test" -vv -- --exact --nocapture
+  ```
+
+## Test coverage setup
+
+```bash
+$ cargo install cargo-tarpaulin
+```
+
+## Show test coverage
+
+```bash
+$ cd $GOPATH/src/github.com/kata-containers/kata-containers/src/agent
+$ cargo -v tarpaulin --all-features --run-types AllTargets --count --force-clean -o Html
+$ xdg-open "file://$PWD/tarpaulin-report.html"
+```
+
+## Testability (part 1)
+
+- To be testable, a function should:
+  - Not be "too long" (say >100 lines).
+  - Not be "too complex" (say >3 levels of indentation).
+  - Should return a `Result` or an `Option` so error paths
+    can be tested.
+
+- If functions don't conform, they need to be reworked (refactored)
+  before writing tests.
+
+## Testability (part 2)
+
+- Some functions can't be fully tested.
+- However, you _can_ test the initial code that checks
+  the parameter values (test error paths only).
+
+## Writing new tests: General advice (part 1)
+
+- KISS: Keep It Simple Stupid
+
+  You don't get extra points for cryptic code.
+
+- DRY: Don't Repeat Yourself
+
+  Make use of existing facilities (don't "re-invert the wheel").
+
+- Read the [unit test advice document](https://github.com/kata-containers/kata-containers/blob/main/docs/Unit-Test-Advice.md)
+
+## Writing new tests: General advice (part 2)
+
+- Attack the function in all possible ways
+
+- Use the _table driven_ approach:
+  - Simple
+  - Compact
+  - Easy to debug
+  - Makes boundary analysis easy
+  - Encourages functions to be testable
+
+## Writing new tests: Specific advice (part 1)
+
+- Create a new "`tests`" module if necessary.
+- Give each test function a "`test_`" prefix.
+- Add the "`#[test]`" annotation on each test function.
+
+## Writing new tests: Specific advice (part 2)
+
+- If you need to `use` (import) packages for the tests,
+  _only do it in the `tests` module_:
+  ```rust
+  use some_test_pkg::{foo, bar}; // <-- Not here
+
+  #[cfg(test)]
+  mod tests {
+    use super::*;
+    use some_test_pkg:{foo, bar}; // <-- Put it here
+  }
+  ```
+
+## Writing new tests: Specific advice (part 3)
+
+- You can add test-specific dependencies in `Cargo.toml`:
+  ```toml
+  [dev-dependencies]
+  serial_test = "0.5.1"
+  ```
+
+## Writing new tests: Specific advice (part 4)
+
+- Don't add in lots of error handling code: let the test panic!
+  ```rust
+  // This will panic if the unwrap fails.
+  // - NOT acceptable generally for production code.
+  // - PERFECTLY acceptable for test code since:
+  //   - Keeps the test code simple.
+  //   - Rust will detect the panic and fail the test.
+  let result = func().unwrap();
+  ```
+
+## Debugging tests (part 1)
+
+- Comment out all tests in your `TestData` array apart from the failing test.
+
+- Add temporary `println!("FIXME: ...")` statements in the code.
+
+- Set `RUST_BACKTRACE=full` before running `cargo test`.
+
+## Debugging tests (part 2)
+
+- Use a debugger (not normally necessary though):
+  ```bash
+  # Disable optimisation
+  $ RUSTFLAGS="-C opt-level=0" cargo test --no-run
+
+  # Find the test binary
+  $ test_binary=$(find target/debug/deps | grep "kata_agent-[a-z0-9][a-z0-9]*$" | tail -1)
+
+  $ rust-gdb "$test_binary"
+  ```
+
+## Useful tips
+
+- Always start a test with a "clean environment":
+
+  Create new set of objects / files / directories / _etc_
+  for each test.
+
+- Mounts
+  - Linux allows mounts on top of existing mounts.
+  - Bind mounts and read-only mounts can be useful.
+
+## Gotchas (part 1)
+
+If a test runs successfully _most of the time_:
+
+- Review the test logic.
+
+- Add a `#[serial]` annotation on the test function
+  Requires the `serial_test` package in the `[dev-dependencies]`
+  section of `Cargo.toml`.
+
+  If this makes it work the test is probably sharing resources with
+  another task (thread).
+
+## Gotchas (part 2)
+
+If a test works locally but fails in the CI, consider the following
+attributes of each environment (local and CI):
+
+- The version of rust being used.
+- The hardware architecture.
+- Number (and spec) of the CPUs.
+
+## Gotchas (part 3)
+
+If in doubt, look at the
+["test artifacts" attached to the failing CI test](http://jenkins.katacontainers.io).
+
+## Before raising a PR
+
+- Remember to check that the test runs locally:
+  - As a non-privileged user.
+  - As the `root` user (carefully!)
+
+- Run the [static checker](https://github.com/kata-containers/tests/blob/main/.ci/static-checks.sh)
+  on your changes.
+
+  Checks formatting and many other things.
+
+## If in doubt
+
+- Ask for help! ;)
+
+## Quiz 1
+
+What's wrong with this function?
+
+```rust
+fn foo(config: &Config, path_prefix: String, container_id: String, pid: String) -> Result<()> {
+    let mut full_path = format!("{}/{}", path_prefix, container_id);
+
+    let _ = remove_recursively(&mut full_path);
+
+    write_number_to_file(pid, full_path);
+
+    Ok(())
+}
+```
+
+## Quiz 1: Answers (part 1)
+
+- No check that `path_prefix`, `container_id` and `pid` are not `""`.
+- No check that `path_prefix` is absolute.
+- No check that `container_id` does not contain slashes / contains only valid characters.
+- Result of `remove_recursively()` discarded.
+- `remove_recursively()` _may_ modify `full_path` without `foo()` knowing!
+
+## Quiz 1: Answers (part 2)
+
+- Why is `pid` not a numeric?
+- No check to ensure the PID is positive.
+- No check to recreate any directories in the original `path_prefix`.
+- `write_number_to_file()` could fail so why doesn't it return a value?
+- The `config` parameter is unused.
+
+## Quiz 1: What if...
+
+Imagine if the caller managed to do this:
+
+```rust
+foo(config, "", "sbin/init", r#"#!/bin/sh\n/sbin/reboot"#);
+```
+
+## Quiz 2
+
+What makes this function difficult to test?
+
+```rust
+fn get_user_id(username: String) -> i32 {
+    let line = grep_file(username, "/etc/passwd").unwrap();
+    let fields = line.split(':');
+
+    let uid = fields.nth(2).ok_or("failed").unwrap();
+
+    uid.parse::<i32>()
+}
+```
+
+## Quiz 2: Answers (part 1)
+
+- Unhelpful error message ("failed").
+
+- Panics on error! Return a `Result` instead!
+
+- UID's cannot be negative so function should return an unsigned
+  value.
+
+## Quiz 2: Answers (part 2)
+
+- Hard-coded filename.
+
+  This would be better:
+
+  ```rust
+  const PASSWD_DB: &str = "/etc/passwd";
+
+  // Test code can now pass valid and invalid files!
+  fn get_user_id(filename: String, username: String) -> i32 {
+    // ...
+  }
+
+  let id = get_user_id(PASSWD_DB, username);
+  ```
+
+## Quiz 3
+
+What's wrong with this test code?
+
+```rust
+let mut obj = Object::new();
+
+// Sanity check
+assert_eq!(obj.num, 0);
+assert_eq!(obj.wibble, false);
+
+// Test 1
+obj->foo_method(7);
+assert_eq!(obj.num, 7);
+
+// Test 2
+obj->bar_method(true);
+assert_eq!(obj.wibble, true);
+```
+
+## Quiz 3: Answers
+
+- The test code is "fragile":
+  - The 2nd test re-uses the object created in the first test.
+
+## Finally
+
+- [We need a GH action to run the unit tests](https://github.com/kata-containers/kata-containers/issues/2934)
+
+  Needs to fail PRs that decrease test coverage<br/> by "x%".

snap/snapcraft.yaml

@@ -320,17 +320,20 @@ parts:
     plugin: nil
     after: [godeps]
     override-build: |
-      export GOPATH=${SNAPCRAFT_STAGE}/gopath
-      yq=${SNAPCRAFT_STAGE}/yq
-      kata_dir=${GOPATH}/src/github.com/${SNAPCRAFT_PROJECT_NAME}/${SNAPCRAFT_PROJECT_NAME}
-      versions_file="${kata_dir}/versions.yaml"
-      version="$(${yq} r ${versions_file} assets.hypervisor.cloud_hypervisor.version)"
-      url="https://github.com/cloud-hypervisor/cloud-hypervisor/releases/download/${version}"
-      curl -L ${url}/cloud-hypervisor-static -o cloud-hypervisor
-      curl -LO ${url}/clh-remote
+      sudo apt-get -y update
+      sudo apt-get -y install ca-certificates curl gnupg lsb-release
+      curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --batch --yes --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+      echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+      sudo apt-get -y update
+      sudo apt-get -y install docker-ce docker-ce-cli containerd.io
+      sudo systemctl start docker.socket
 
-      install -D cloud-hypervisor ${SNAPCRAFT_PART_INSTALL}/usr/bin/cloud-hypervisor
-      install -D clh-remote ${SNAPCRAFT_PART_INSTALL}/usr/bin/clh-remote
+      export GOPATH=${SNAPCRAFT_STAGE}/gopath
+      kata_dir=${GOPATH}/src/github.com/${SNAPCRAFT_PROJECT_NAME}/${SNAPCRAFT_PROJECT_NAME}
+      cd ${kata_dir}
+      sudo -E NO_TTY=true make cloud-hypervisor-tarball
+      tar xvJpf build/kata-static-cloud-hypervisor.tar.xz -C /tmp/
+      install -D /tmp/opt/kata/bin/cloud-hypervisor ${SNAPCRAFT_PART_INSTALL}/usr/bin/cloud-hypervisor
 
 apps:
   runtime:

src/agent/rustjail/src/cgroups/fs/mod.rs

@@ -905,13 +905,7 @@ pub fn get_paths() -> Result<HashMap<String, String>> {
 
         let keys: Vec<&str> = fl[1].split(',').collect();
         for key in &keys {
-            // this is a workaround, cgroup file are using `name=systemd`,
-            // but if file system the name is `systemd`
-            if *key == "name=systemd" {
-                m.insert("systemd".to_string(), fl[2].to_string());
-            } else {
-                m.insert(key.to_string(), fl[2].to_string());
-            }
+            m.insert(key.to_string(), fl[2].to_string());
         }
     }
     Ok(m)

src/runtime/Makefile

@@ -8,20 +8,19 @@ SKIP_GO_VERSION_CHECK=
 include golang.mk
 
 #Get ARCH.
-ifneq (,$(golang_version_raw))
-    GOARCH=$(shell go env GOARCH)
-    ifeq ($(ARCH),)
-        ARCH = $(GOARCH)
-    endif
-else
-    ARCH = $(shell uname -m)
-    ifeq ($(ARCH),x86_64)
-        ARCH = amd64
-    endif
-    ifeq ($(ARCH),aarch64)
-        ARCH = arm64
+ifeq ($(ARCH),)
+    ifneq (,$(golang_version_raw))
+        override ARCH = $(shell go env GOARCH)
+    else
+        override ARCH = $(shell uname -m)
     endif
 endif
+ifeq ($(ARCH),x86_64)
+    override ARCH = amd64
+endif
+ifeq ($(ARCH),aarch64)
+    override ARCH = arm64
+endif
 
 ARCH_DIR = arch
 ARCH_FILE_SUFFIX = -options.mk
@@ -29,8 +28,12 @@ ARCH_FILE = $(ARCH_DIR)/$(ARCH)$(ARCH_FILE_SUFFIX)
 ARCH_FILES = $(wildcard arch/*$(ARCH_FILE_SUFFIX))
 ALL_ARCHES = $(patsubst $(ARCH_DIR)/%$(ARCH_FILE_SUFFIX),%,$(ARCH_FILES))
 
-# Load architecture-dependent settings
-include $(ARCH_FILE)
+ifeq (,$(realpath $(ARCH_FILE)))
+    $(error "ERROR: invalid architecture: '$(ARCH)'")
+else
+    # Load architecture-dependent settings
+    include $(ARCH_FILE)
+endif
 
 PROJECT_TYPE = kata
 PROJECT_NAME = Kata Containers
@@ -158,6 +161,8 @@ DEFDISABLEGUESTSECCOMP := true
 #Default experimental features enabled
 DEFAULTEXPFEATURES := []
 
+DEFDISABLESELINUX := false
+
 #Default entropy source
 DEFENTROPYSOURCE := /dev/urandom
 DEFVALIDENTROPYSOURCES := [\"/dev/urandom\",\"/dev/random\",\"\"]
@@ -193,9 +198,6 @@ DEFSTATICRESOURCEMGMT ?= false
 
 DEFBINDMOUNTS := []
 
-# Features
-FEATURE_SELINUX ?= check
-
 SED = sed
 
 CLI_DIR = cmd
@@ -433,6 +435,7 @@ USER_VARS += DEFNETWORKMODEL_CLH
 USER_VARS += DEFNETWORKMODEL_FC
 USER_VARS += DEFNETWORKMODEL_QEMU
 USER_VARS += DEFDISABLEGUESTSECCOMP
+USER_VARS += DEFDISABLESELINUX
 USER_VARS += DEFAULTEXPFEATURES
 USER_VARS += DEFDISABLEBLOCK
 USER_VARS += DEFBLOCKSTORAGEDRIVER_ACRN
@@ -460,7 +463,6 @@ USER_VARS += DEFSTATICRESOURCEMGMT
 USER_VARS += DEFSTATICRESOURCEMGMT_FC
 USER_VARS += DEFBINDMOUNTS
 USER_VARS += DEFVFIOMODE
-USER_VARS += FEATURE_SELINUX
 USER_VARS += BUILDFLAGS
 
 
@@ -475,21 +477,6 @@ QUIET_TEST     = $(Q:@=@echo    '     TEST     '$@;)
 
 BUILDTAGS :=
 
-ifneq ($(FEATURE_SELINUX),no)
-    SELINUXTAG := $(shell ./hack/selinux_tag.sh)
-
-    ifneq ($(SELINUXTAG),)
-        override FEATURE_SELINUX = yes
-        BUILDTAGS += --tags "$(SELINUXTAG)"
-    else
-        ifeq ($(FEATURE_SELINUX),yes)
-            $(error "ERROR: SELinux support requested, but libselinux is not available")
-        endif
-
-        override FEATURE_SELINUX = no
-    endif
-endif
-
 # go build common flags
 BUILDFLAGS := -buildmode=pie -mod=vendor ${BUILDTAGS}
 
@@ -568,8 +555,8 @@ $(SHIMV2_OUTPUT): $(SOURCES) $(GENERATED_FILES) $(MAKEFILE_LIST)
 	$(QUIET_BUILD)(cd $(SHIMV2_DIR)/ && go build -ldflags "$(KATA_LDFLAGS)" $(BUILDFLAGS) -o $@ .)
 
 $(MONITOR_OUTPUT): $(SOURCES) $(GENERATED_FILES) $(MAKEFILE_LIST) .git-commit
-	$(QUIET_BUILD)(cd $(MONITOR_DIR)/ && CGO_ENABLED=0 go build \
-		--ldflags "-X main.GitCommit=$(shell cat .git-commit)" $(BUILDFLAGS) -buildmode=exe -o $@ .)
+	$(QUIET_BUILD)(cd $(MONITOR_DIR)/ && go build \
+		--ldflags "-X main.GitCommit=$(shell cat .git-commit)" $(BUILDFLAGS) -o $@ .)
 
 .PHONY: \
 	check \
@@ -749,9 +736,6 @@ endif
 	@printf "\tKnown: $(sort $(HYPERVISORS))\n"
 	@printf "\tAvailable for this architecture: $(sort $(KNOWN_HYPERVISORS))\n"
 	@printf "\n"
-	@printf "• Features:\n"
-	@printf "\tSELinux (FEATURE_SELINUX): $(FEATURE_SELINUX)\n"
-	@printf "\n"
 	@printf "• Summary:\n"
 	@printf "\n"
 	@printf "\tdestination install path (DESTDIR) : %s\n" $(abspath $(DESTDIR))

src/runtime/cmd/kata-monitor/main.go

@@ -18,7 +18,9 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-var monitorListenAddr = flag.String("listen-address", ":8090", "The address to listen on for HTTP requests.")
+const defaultListenAddress = "127.0.0.1:8090"
+
+var monitorListenAddr = flag.String("listen-address", defaultListenAddress, "The address to listen on for HTTP requests.")
 var runtimeEndpoint = flag.String("runtime-endpoint", "/run/containerd/containerd.sock", `Endpoint of CRI container runtime service. (default: "/run/containerd/containerd.sock")`)
 var logLevel = flag.String("log-level", "info", "Log level of logrus(trace/debug/info/warn/error/fatal/panic).")
 
@@ -26,7 +28,7 @@ var logLevel = flag.String("log-level", "info", "Log level of logrus(trace/debug
 var (
 	appName = "kata-monitor"
 	// version is the kata monitor version.
-	version = "0.2.0"
+	version = "0.3.0"
 
 	GitCommit = "unknown-commit"
 )

src/runtime/config/configuration-acrn.toml.in

@@ -185,6 +185,9 @@ internetworking_model="@DEFNETWORKMODEL_ACRN@"
 # (default: true)
 disable_guest_seccomp=@DEFDISABLEGUESTSECCOMP@
 
+# disable applying SELinux on the VMM process (default false)
+disable_selinux=@DEFDISABLESELINUX@
+
 # If enabled, the runtime will create opentracing.io traces and spans.
 # (See https://www.jaegertracing.io/docs/getting-started).
 # (default: disabled)

src/runtime/config/configuration-clh.toml.in

@@ -15,6 +15,37 @@ path = "@CLHPATH@"
 kernel = "@KERNELPATH_CLH@"
 image = "@IMAGEPATH@"
 
+# Enable confidential guest support.
+# Toggling that setting may trigger different hardware features, ranging
+# from memory encryption to both memory and CPU-state encryption and integrity.
+# The Kata Containers runtime dynamically detects the available feature set and
+# aims at enabling the largest possible one, returning an error if none is
+# available, or none is supported by the hypervisor.
+#
+# Known limitations:
+# * Does not work by design:
+#   - CPU Hotplug 
+#   - Device Hotplug
+#   - Memory Hotplug
+#   - NVDIMM devices
+#
+# Supported TEEs:
+# * Intel TDX
+#
+# Default false
+# confidential_guest = true
+
+# Path to the firmware.
+# If you want Cloud Hypervisor to use a specific firmware, set its path below.
+# This is option is only used when confidential_guest is enabled.
+#
+# For more information about firmwared that can be used with specific TEEs,
+# please, refer to:
+# * Intel TDX:
+#   - td-shim: https://github.com/confidential-containers/td-shim
+#
+# firmware = "@FIRMWAREPATH@"
+
 # List of valid annotation names for the hypervisor
 # Each member of the list is a regular expression, which is the base name
 # of the annotation, e.g. "path" for io.katacontainers.config.hypervisor.path"
@@ -205,6 +236,9 @@ internetworking_model="@DEFNETWORKMODEL_CLH@"
 # (default: true)
 disable_guest_seccomp=@DEFDISABLEGUESTSECCOMP@
 
+# disable applying SELinux on the VMM process (default false)
+disable_selinux=@DEFDISABLESELINUX@
+
 # If enabled, the runtime will create opentracing.io traces and spans.
 # (See https://www.jaegertracing.io/docs/getting-started).
 # (default: disabled)

src/runtime/config/configuration-fc.toml.in

@@ -309,6 +309,9 @@ internetworking_model="@DEFNETWORKMODEL_FC@"
 # (default: true)
 disable_guest_seccomp=@DEFDISABLEGUESTSECCOMP@
 
+# disable applying SELinux on the VMM process (default false)
+disable_selinux=@DEFDISABLESELINUX@
+
 # If enabled, the runtime will create opentracing.io traces and spans.
 # (See https://www.jaegertracing.io/docs/getting-started).
 # (default: disabled)

src/runtime/config/configuration-qemu.toml.in

@@ -20,7 +20,16 @@ machine_type = "@MACHINETYPE@"
 # Toggling that setting may trigger different hardware features, ranging
 # from memory encryption to both memory and CPU-state encryption and integrity.
 # The Kata Containers runtime dynamically detects the available feature set and
-# aims at enabling the largest possible one.
+# aims at enabling the largest possible one, returning an error if none is
+# available, or none is supported by the hypervisor.
+#
+# Known limitations:
+# * Does not work by design:
+#   - CPU Hotplug 
+#   - Device Hotplug
+#   - Memory Hotplug
+#   - NVDIMM devices
+#
 # Default false
 # confidential_guest = true
 
@@ -279,6 +288,9 @@ pflashes = []
 
 # If false and nvdimm is supported, use nvdimm device to plug guest image.
 # Otherwise virtio-block device is used.
+#
+# nvdimm is not supported when `confidential_guest = true`.
+#
 # Default is false
 #disable_image_nvdimm = true
 
@@ -492,6 +504,9 @@ internetworking_model="@DEFNETWORKMODEL_QEMU@"
 # (default: true)
 disable_guest_seccomp=@DEFDISABLEGUESTSECCOMP@
 
+# disable applying SELinux on the VMM process (default false)
+disable_selinux=@DEFDISABLESELINUX@
+
 # If enabled, the runtime will create opentracing.io traces and spans.
 # (See https://www.jaegertracing.io/docs/getting-started).
 # (default: disabled)

src/runtime/go.mod

@@ -3,6 +3,7 @@ module github.com/kata-containers/kata-containers/src/runtime
 go 1.14
 
 require (
+	code.cloudfoundry.org/bytefmt v0.0.0-20211005130812-5bb3c17173e5
 	github.com/BurntSushi/toml v0.3.1
 	github.com/blang/semver v3.5.1+incompatible
 	github.com/blang/semver/v4 v4.0.0

src/runtime/go.sum

@@ -38,6 +38,8 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+code.cloudfoundry.org/bytefmt v0.0.0-20211005130812-5bb3c17173e5 h1:tM5+dn2C9xZw1RzgI6WTQW1rGqdUimKB3RFbyu4h6Hc=
+code.cloudfoundry.org/bytefmt v0.0.0-20211005130812-5bb3c17173e5/go.mod h1:v4VVB6oBMz/c9fRY6vZrwr5xKRWOH5NPDjQZlPk0Gbs=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/AdaLogics/go-fuzz-headers v0.0.0-20210715213245-6c3934b029d8/go.mod h1:CzsSbkDixRphAF5hS6wbMKq0eI6ccJRb7/A0M6JBnwg=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
@@ -550,8 +552,9 @@ github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1Cpa
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
 github.com/onsi/gomega v1.9.0/go.mod h1:Ho0h+IUsWyvy1OpqCwxlQ/21gkhVunqlU8fDGcoTdcA=
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
-github.com/onsi/gomega v1.15.0 h1:WjP/FQ/sk43MRmnEcT+MlDw2TFvkrXlprrPST/IudjU=
 github.com/onsi/gomega v1.15.0/go.mod h1:cIuvLEne0aoVhAgh/O6ac0Op8WWw9H6eYCriF+tEHG0=
+github.com/onsi/gomega v1.16.0 h1:6gjqkI8iiRHMvdccRJM8rVKjCWk6ZIm6FTm3ddIe4/c=
+github.com/onsi/gomega v1.16.0/go.mod h1:HnhC7FXeEQY45zxNK3PPoIUhzk/80Xly9PcubAlGdZY=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.0.2 h1:9yCKha/T5XdGtO0q9Q9a6T5NUCsTn/DrBg0D7ufOcFM=

src/runtime/pkg/containerd-shim-v2/event_forwarder.go

@@ -0,0 +1,88 @@
+// Copyright (c) 2022 Ant Group
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package containerdshim
+
+import (
+	"context"
+	"os"
+	"time"
+
+	"github.com/containerd/containerd/events"
+)
+
+type forwarderType string
+
+const (
+	forwarderTypeLog        forwarderType = "log"
+	forwarderTypeContainerd forwarderType = "containerd"
+
+	// A time span used to wait for publish a containerd event,
+	// once it costs a longer time than timeOut, it will be canceld.
+	timeOut = 5 * time.Second
+
+	// ttrpc address passed from container runtime.
+	// For now containerd will pass the address, and CRI-O will not
+	ttrpcAddressEnv = "TTRPC_ADDRESS"
+)
+
+type eventsForwarder interface {
+	forward()
+	forwarderType() forwarderType
+}
+
+type logForwarder struct {
+	s *service
+}
+
+func (lf *logForwarder) forward() {
+	for e := range lf.s.events {
+		shimLog.WithField("topic", getTopic(e)).Infof("post event: %+v", e)
+	}
+}
+
+func (lf *logForwarder) forwarderType() forwarderType {
+	return forwarderTypeLog
+}
+
+type containerdForwarder struct {
+	s         *service
+	ctx       context.Context
+	publisher events.Publisher
+}
+
+func (cf *containerdForwarder) forward() {
+	for e := range cf.s.events {
+		ctx, cancel := context.WithTimeout(cf.ctx, timeOut)
+		err := cf.publisher.Publish(ctx, getTopic(e), e)
+		cancel()
+		if err != nil {
+			shimLog.WithError(err).Error("post event")
+		}
+	}
+}
+
+func (cf *containerdForwarder) forwarderType() forwarderType {
+	return forwarderTypeContainerd
+}
+
+func (s *service) newEventsForwarder(ctx context.Context, publisher events.Publisher) eventsForwarder {
+	var forwarder eventsForwarder
+	ttrpcAddress := os.Getenv(ttrpcAddressEnv)
+	if ttrpcAddress == "" {
+		// non containerd will use log forwarder to write events to log
+		forwarder = &logForwarder{
+			s: s,
+		}
+	} else {
+		forwarder = &containerdForwarder{
+			s:         s,
+			ctx:       ctx,
+			publisher: publisher,
+		}
+	}
+
+	return forwarder
+}

src/runtime/pkg/containerd-shim-v2/event_forwarder_test.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2022 Ant Group
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package containerdshim
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/containerd/containerd/events"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/vcmock"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewEventsForwarder(t *testing.T) {
+	assert := assert.New(t)
+
+	sandbox := &vcmock.Sandbox{
+		MockID: testSandboxID,
+	}
+
+	s := &service{
+		id:         testSandboxID,
+		sandbox:    sandbox,
+		containers: make(map[string]*container),
+	}
+
+	// newEventsForwarder will not call publisher to publish events
+	// so here we can use a nil pointer to test newEventsForwarder
+	var publisher events.Publisher
+
+	// check log forwarder
+	forwarder := s.newEventsForwarder(context.Background(), publisher)
+	assert.Equal(forwarderTypeLog, forwarder.forwarderType())
+
+	// check containerd forwarder
+	os.Setenv(ttrpcAddressEnv, "/foo/bar.sock")
+	defer os.Setenv(ttrpcAddressEnv, "")
+	forwarder = s.newEventsForwarder(context.Background(), publisher)
+	assert.Equal(forwarderTypeContainerd, forwarder.forwarderType())
+}

src/runtime/pkg/containerd-shim-v2/service.go

@@ -17,7 +17,6 @@ import (
 	eventstypes "github.com/containerd/containerd/api/events"
 	"github.com/containerd/containerd/api/types/task"
 	"github.com/containerd/containerd/errdefs"
-	"github.com/containerd/containerd/events"
 	"github.com/containerd/containerd/namespaces"
 	cdruntime "github.com/containerd/containerd/runtime"
 	cdshim "github.com/containerd/containerd/runtime/v2/shim"
@@ -51,10 +50,6 @@ const (
 
 	chSize      = 128
 	exitCode255 = 255
-
-	// A time span used to wait for publish a containerd event,
-	// once it costs a longer time than timeOut, it will be canceld.
-	timeOut = 5 * time.Second
 )
 
 var (
@@ -100,7 +95,8 @@ func New(ctx context.Context, id string, publisher cdshim.Publisher, shutdown fu
 
 	go s.processExits()
 
-	go s.forward(ctx, publisher)
+	forwarder := s.newEventsForwarder(ctx, publisher)
+	go forwarder.forward()
 
 	return s, nil
 }
@@ -256,17 +252,6 @@ func (s *service) StartShim(ctx context.Context, opts cdshim.StartOpts) (_ strin
 	return address, nil
 }
 
-func (s *service) forward(ctx context.Context, publisher events.Publisher) {
-	for e := range s.events {
-		ctx, cancel := context.WithTimeout(ctx, timeOut)
-		err := publisher.Publish(ctx, getTopic(e), e)
-		cancel()
-		if err != nil {
-			shimLog.WithError(err).Error("post event")
-		}
-	}
-}
-
 func (s *service) send(evt interface{}) {
 	// for unit test, it will not initialize s.events
 	if s.events != nil {

src/runtime/pkg/govmm/qemu/qemu_arch_base_test.go

@@ -1,3 +1,4 @@
+//go:build !s390x
 // +build !s390x
 
 // Copyright contributors to the Virtual Machine Manager for Go project

src/runtime/pkg/govmm/vmm_amd64.go

@@ -0,0 +1,12 @@
+//
+// Copyright (c) 2018 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	return uint32(240)
+}

src/runtime/pkg/govmm/vmm_arm64.go

@@ -0,0 +1,25 @@
+//
+// Copyright (c) 2018 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+//In qemu, maximum number of vCPUs depends on the GIC version, or on how
+//many redistributors we can fit into the memory map.
+//related codes are under github.com/qemu/qemu/hw/arm/virt.c(Line 135 and 1306 in stable-2.11)
+//for now, qemu only supports v2 and v3, we treat v4 as v3 based on
+//backward compatibility.
+var gicList = map[uint32]uint32{
+	uint32(2): uint32(8),
+	uint32(3): uint32(123),
+	uint32(4): uint32(123),
+}
+
+var defaultGICVersion = uint32(3)
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	return gicList[defaultGICVersion]
+}

src/runtime/pkg/govmm/vmm_ppc64le.go

@@ -0,0 +1,12 @@
+//
+// Copyright (c) 2018 IBM
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	return uint32(128)
+}

src/runtime/pkg/govmm/vmm_s390x.go

@@ -0,0 +1,15 @@
+//
+// Copyright (c) 2018 IBM
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	// Max number of virtual Cpu defined in qemu. See
+	// https://github.com/qemu/qemu/blob/80422b00196a7af4c6efb628fae0ad8b644e98af/target/s390x/cpu.h#L55
+	// #define S390_MAX_CPUS 248
+	return uint32(248)
+}

src/runtime/pkg/kata-monitor/cri.go

@@ -142,7 +142,7 @@ func (km *KataMonitor) syncSandboxes(sandboxList []string) ([]string, error) {
 	for _, pod := range r.Items {
 		for _, sandbox := range sandboxList {
 			if pod.Id == sandbox {
-				km.sandboxCache.setMetadata(sandbox, sandboxKubeData{
+				km.sandboxCache.setCRIMetadata(sandbox, sandboxCRIMetadata{
 					uid:       pod.Metadata.Uid,
 					name:      pod.Metadata.Name,
 					namespace: pod.Metadata.Namespace,
@@ -151,9 +151,9 @@ func (km *KataMonitor) syncSandboxes(sandboxList []string) ([]string, error) {
 				sandboxList = removeFromSandboxList(sandboxList, sandbox)
 
 				monitorLog.WithFields(logrus.Fields{
-					"Pod Name":      pod.Metadata.Name,
-					"Pod Namespace": pod.Metadata.Namespace,
-					"Pod UID":       pod.Metadata.Uid,
+					"cri-name":      pod.Metadata.Name,
+					"cri-namespace": pod.Metadata.Namespace,
+					"cri-uid":       pod.Metadata.Uid,
 				}).Debugf("Synced KATA POD %s", pod.Id)
 
 				break

src/runtime/pkg/kata-monitor/metrics.go

@@ -160,12 +160,12 @@ func (km *KataMonitor) aggregateSandboxMetrics(encoder expfmt.Encoder) error {
 
 	// get metrics from sandbox's shim
 	for _, sandboxID := range sandboxes {
-		sandboxMetadata, ok := km.sandboxCache.getMetadata(sandboxID)
+		sandboxMetadata, ok := km.sandboxCache.getCRIMetadata(sandboxID)
 		if !ok { // likely the sandbox has been just removed
 			continue
 		}
 		wg.Add(1)
-		go func(sandboxID string, sandboxMetadata sandboxKubeData, results chan<- []*dto.MetricFamily) {
+		go func(sandboxID string, sandboxMetadata sandboxCRIMetadata, results chan<- []*dto.MetricFamily) {
 			sandboxMetrics, err := getParsedMetrics(sandboxID, sandboxMetadata)
 			if err != nil {
 				monitorLog.WithError(err).WithField("sandbox_id", sandboxID).Errorf("failed to get metrics for sandbox")
@@ -223,7 +223,7 @@ func (km *KataMonitor) aggregateSandboxMetrics(encoder expfmt.Encoder) error {
 
 }
 
-func getParsedMetrics(sandboxID string, sandboxMetadata sandboxKubeData) ([]*dto.MetricFamily, error) {
+func getParsedMetrics(sandboxID string, sandboxMetadata sandboxCRIMetadata) ([]*dto.MetricFamily, error) {
 	body, err := doGet(sandboxID, defaultTimeout, "metrics")
 	if err != nil {
 		return nil, err
@@ -244,7 +244,7 @@ func GetSandboxMetrics(sandboxID string) (string, error) {
 
 // parsePrometheusMetrics will decode metrics from Prometheus text format
 // and return array of *dto.MetricFamily with an ASC order
-func parsePrometheusMetrics(sandboxID string, sandboxMetadata sandboxKubeData, body []byte) ([]*dto.MetricFamily, error) {
+func parsePrometheusMetrics(sandboxID string, sandboxMetadata sandboxCRIMetadata, body []byte) ([]*dto.MetricFamily, error) {
 	reader := bytes.NewReader(body)
 	decoder := expfmt.NewDecoder(reader, expfmt.FmtText)
 
@@ -268,15 +268,15 @@ func parsePrometheusMetrics(sandboxID string, sandboxMetadata sandboxKubeData, b
 					Value: mutils.String2Pointer(sandboxID),
 				},
 				&dto.LabelPair{
-					Name:  mutils.String2Pointer("kube_uid"),
+					Name:  mutils.String2Pointer("cri_uid"),
 					Value: mutils.String2Pointer(sandboxMetadata.uid),
 				},
 				&dto.LabelPair{
-					Name:  mutils.String2Pointer("kube_name"),
+					Name:  mutils.String2Pointer("cri_name"),
 					Value: mutils.String2Pointer(sandboxMetadata.name),
 				},
 				&dto.LabelPair{
-					Name:  mutils.String2Pointer("kube_namespace"),
+					Name:  mutils.String2Pointer("cri_namespace"),
 					Value: mutils.String2Pointer(sandboxMetadata.namespace),
 				},
 			)

src/runtime/pkg/kata-monitor/metrics_test.go

@@ -40,7 +40,7 @@ ttt 999
 func TestParsePrometheusMetrics(t *testing.T) {
 	assert := assert.New(t)
 	sandboxID := "sandboxID-abc"
-	sandboxMetadata := sandboxKubeData{"123", "pod-name", "pod-namespace"}
+	sandboxMetadata := sandboxCRIMetadata{"123", "pod-name", "pod-namespace"}
 
 	// parse metrics
 	list, err := parsePrometheusMetrics(sandboxID, sandboxMetadata, []byte(shimMetricBody))
@@ -60,12 +60,12 @@ func TestParsePrometheusMetrics(t *testing.T) {
 	assert.Equal(4, len(m.Label), "should have 4 labels")
 	assert.Equal("sandbox_id", *m.Label[0].Name, "label name should be sandbox_id")
 	assert.Equal(sandboxID, *m.Label[0].Value, "label value should be", sandboxID)
-	assert.Equal("kube_uid", *m.Label[1].Name, "label name should be kube_uid")
+	assert.Equal("cri_uid", *m.Label[1].Name, "label name should be cri_uid")
 	assert.Equal(sandboxMetadata.uid, *m.Label[1].Value, "label value should be", sandboxMetadata.uid)
 
-	assert.Equal("kube_name", *m.Label[2].Name, "label name should be kube_name")
+	assert.Equal("cri_name", *m.Label[2].Name, "label name should be cri_name")
 	assert.Equal(sandboxMetadata.name, *m.Label[2].Value, "label value should be", sandboxMetadata.name)
-	assert.Equal("kube_namespace", *m.Label[3].Name, "label name should be kube_namespace")
+	assert.Equal("cri_namespace", *m.Label[3].Name, "label name should be cri_namespace")
 	assert.Equal(sandboxMetadata.namespace, *m.Label[3].Value, "label value should be", sandboxMetadata.namespace)
 
 	summary := m.Summary

src/runtime/pkg/kata-monitor/monitor.go

@@ -53,7 +53,7 @@ func NewKataMonitor(runtimeEndpoint string) (*KataMonitor, error) {
 		runtimeEndpoint: runtimeEndpoint,
 		sandboxCache: &sandboxCache{
 			Mutex:     &sync.Mutex{},
-			sandboxes: make(map[string]sandboxKubeData),
+			sandboxes: make(map[string]sandboxCRIMetadata),
 		},
 	}
 
@@ -104,10 +104,14 @@ func (km *KataMonitor) startPodCacheUpdater() {
 		monitorLog.WithError(err).Fatal("cannot read sandboxes fs")
 		os.Exit(1)
 	}
+	for _, sandbox := range sandboxList {
+		km.sandboxCache.putIfNotExists(sandbox, sandboxCRIMetadata{})
+	}
+
 	monitorLog.Debug("initial sync of sbs directory completed")
 	monitorLog.Tracef("pod list from sbs: %v", sandboxList)
 
-	// We should get kubernetes metadata from the container manager for each new kata sandbox we detect.
+	// We try to get CRI (kubernetes) metadata from the container manager for each new kata sandbox we detect.
 	// It may take a while for data to be available, so we always wait podCacheRefreshDelaySeconds before checking.
 	cacheUpdateTimer := time.NewTimer(podCacheRefreshDelaySeconds * time.Second)
 	cacheUpdateTimerIsSet := true
@@ -123,7 +127,7 @@ func (km *KataMonitor) startPodCacheUpdater() {
 			case fsnotify.Create:
 				splitPath := strings.Split(event.Name, string(os.PathSeparator))
 				id := splitPath[len(splitPath)-1]
-				if !km.sandboxCache.putIfNotExists(id, sandboxKubeData{}) {
+				if !km.sandboxCache.putIfNotExists(id, sandboxCRIMetadata{}) {
 					monitorLog.WithField("pod", id).Warn(
 						"CREATE event but pod already present in the sandbox cache")
 				}

src/runtime/pkg/kata-monitor/sandbox_cache.go

@@ -9,15 +9,15 @@ import (
 	"sync"
 )
 
-type sandboxKubeData struct {
+type sandboxCRIMetadata struct {
 	uid       string
 	name      string
 	namespace string
 }
 type sandboxCache struct {
 	*sync.Mutex
-	// the sandboxKubeData links the sandbox id from the container manager to the pod metadata of kubernetes
-	sandboxes map[string]sandboxKubeData
+	// the sandboxCRIMetadata links the sandbox id from the container manager to the pod metadata of kubernetes
+	sandboxes map[string]sandboxCRIMetadata
 }
 
 func (sc *sandboxCache) getSandboxList() []string {
@@ -43,7 +43,7 @@ func (sc *sandboxCache) deleteIfExists(id string) bool {
 	return false
 }
 
-func (sc *sandboxCache) putIfNotExists(id string, value sandboxKubeData) bool {
+func (sc *sandboxCache) putIfNotExists(id string, value sandboxCRIMetadata) bool {
 	sc.Lock()
 	defer sc.Unlock()
 
@@ -56,14 +56,14 @@ func (sc *sandboxCache) putIfNotExists(id string, value sandboxKubeData) bool {
 	return false
 }
 
-func (sc *sandboxCache) setMetadata(id string, value sandboxKubeData) {
+func (sc *sandboxCache) setCRIMetadata(id string, value sandboxCRIMetadata) {
 	sc.Lock()
 	defer sc.Unlock()
 
 	sc.sandboxes[id] = value
 }
 
-func (sc *sandboxCache) getMetadata(id string) (sandboxKubeData, bool) {
+func (sc *sandboxCache) getCRIMetadata(id string) (sandboxCRIMetadata, bool) {
 	sc.Lock()
 	defer sc.Unlock()
 

src/runtime/pkg/kata-monitor/sandbox_cache_test.go

@@ -16,19 +16,19 @@ func TestSandboxCache(t *testing.T) {
 	assert := assert.New(t)
 	sc := &sandboxCache{
 		Mutex:     &sync.Mutex{},
-		sandboxes: map[string]sandboxKubeData{"111": {"1-2-3", "test-name", "test-namespace"}},
+		sandboxes: map[string]sandboxCRIMetadata{"111": {"1-2-3", "test-name", "test-namespace"}},
 	}
 
 	assert.Equal(1, len(sc.getSandboxList()))
 
 	// put new item
 	id := "new-id"
-	b := sc.putIfNotExists(id, sandboxKubeData{})
+	b := sc.putIfNotExists(id, sandboxCRIMetadata{})
 	assert.Equal(true, b)
 	assert.Equal(2, len(sc.getSandboxList()))
 
 	// put key that alreay exists
-	b = sc.putIfNotExists(id, sandboxKubeData{})
+	b = sc.putIfNotExists(id, sandboxCRIMetadata{})
 	assert.Equal(false, b)
 
 	b = sc.deleteIfExists(id)

src/runtime/pkg/katautils/config.go

@@ -15,6 +15,7 @@ import (
 	"strings"
 
 	"github.com/BurntSushi/toml"
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	govmmQemu "github.com/kata-containers/kata-containers/src/runtime/pkg/govmm/qemu"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils/katatrace"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/oci"
@@ -135,6 +136,7 @@ type hypervisor struct {
 	GuestSwap               bool     `toml:"enable_guest_swap"`
 	Rootless                bool     `toml:"rootless"`
 	DisableSeccomp          bool     `toml:"disable_seccomp"`
+	DisableSeLinux          bool     `toml:"disable_selinux"`
 }
 
 type runtime struct {
@@ -343,7 +345,7 @@ func (h hypervisor) defaultVCPUs() uint32 {
 
 func (h hypervisor) defaultMaxVCPUs() uint32 {
 	numcpus := uint32(goruntime.NumCPU())
-	maxvcpus := vc.MaxQemuVCPUs()
+	maxvcpus := govmm.MaxVCPUs()
 	reqVCPUs := h.DefaultMaxVCPUs
 
 	//don't exceed the number of physical CPUs. If a default is not provided, use the
@@ -876,6 +878,8 @@ func newClhHypervisorConfig(h hypervisor) (vc.HypervisorConfig, error) {
 		SGXEPCSize:              defaultSGXEPCSize,
 		EnableAnnotations:       h.EnableAnnotations,
 		DisableSeccomp:          h.DisableSeccomp,
+		ConfidentialGuest:       h.ConfidentialGuest,
+		DisableSeLinux:          h.DisableSeLinux,
 	}, nil
 }
 

src/runtime/pkg/katautils/config_test.go

@@ -17,6 +17,7 @@ import (
 	"syscall"
 	"testing"
 
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	ktu "github.com/kata-containers/kata-containers/src/runtime/pkg/katatestutils"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/oci"
 	vc "github.com/kata-containers/kata-containers/src/runtime/virtcontainers"
@@ -919,7 +920,7 @@ func TestHypervisorDefaults(t *testing.T) {
 	h.DefaultMaxVCPUs = numCPUs + 1
 	assert.Equal(h.defaultMaxVCPUs(), numCPUs, "default max vCPU number is wrong")
 
-	maxvcpus := vc.MaxQemuVCPUs()
+	maxvcpus := govmm.MaxVCPUs()
 	h.DefaultMaxVCPUs = maxvcpus + 1
 	assert.Equal(h.defaultMaxVCPUs(), numCPUs, "default max vCPU number is wrong")
 

src/runtime/pkg/katautils/create.go

@@ -155,11 +155,19 @@ func CreateSandbox(ctx context.Context, vci vc.VC, ociSpec specs.Spec, runtimeCo
 		}
 	}()
 
-	// Run pre-start OCI hooks.
-	err = EnterNetNS(sandboxConfig.NetworkConfig.NetworkID, func() error {
-		return PreStartHooks(ctx, ociSpec, containerID, bundlePath)
-	})
-	if err != nil {
+	if ociSpec.Annotations == nil {
+		ociSpec.Annotations = make(map[string]string)
+	}
+	ociSpec.Annotations["nerdctl/network-namespace"] = sandboxConfig.NetworkConfig.NetworkID
+	sandboxConfig.Annotations["nerdctl/network-namespace"] = ociSpec.Annotations["nerdctl/network-namespace"]
+
+	// Run pre-start OCI hooks, in the runtime namespace.
+	if err := PreStartHooks(ctx, ociSpec, containerID, bundlePath); err != nil {
+		return nil, vc.Process{}, err
+	}
+
+	// Run create runtime OCI hooks, in the runtime namespace.
+	if err := CreateRuntimeHooks(ctx, ociSpec, containerID, bundlePath); err != nil {
 		return nil, vc.Process{}, err
 	}
 

src/runtime/pkg/katautils/create_test.go

@@ -264,6 +264,46 @@ func TestCreateSandboxFail(t *testing.T) {
 	assert.True(vcmock.IsMockError(err))
 }
 
+func TestCreateSandboxAnnotations(t *testing.T) {
+	if tc.NotValid(ktu.NeedRoot()) {
+		t.Skip(ktu.TestDisabledNeedRoot)
+	}
+
+	assert := assert.New(t)
+
+	tmpdir, bundlePath, _ := ktu.SetupOCIConfigFile(t)
+	defer os.RemoveAll(tmpdir)
+
+	runtimeConfig, err := newTestRuntimeConfig(tmpdir, testConsole, true)
+	assert.NoError(err)
+
+	spec, err := compatoci.ParseConfigJSON(bundlePath)
+	assert.NoError(err)
+
+	rootFs := vc.RootFs{Mounted: true}
+
+	testingImpl.CreateSandboxFunc = func(ctx context.Context, sandboxConfig vc.SandboxConfig) (vc.VCSandbox, error) {
+		return &vcmock.Sandbox{
+			MockID: testSandboxID,
+			MockContainers: []*vcmock.Container{
+				{MockID: testContainerID},
+			},
+			MockAnnotations: sandboxConfig.Annotations,
+		}, nil
+	}
+
+	defer func() {
+		testingImpl.CreateSandboxFunc = nil
+	}()
+
+	sandbox, _, err := CreateSandbox(context.Background(), testingImpl, spec, runtimeConfig, rootFs, testContainerID, bundlePath, testConsole, true, true)
+	assert.NoError(err)
+
+	netNsPath, err := sandbox.Annotations("nerdctl/network-namespace")
+	assert.NoError(err)
+	assert.Equal(path.Dir(netNsPath), "/var/run/netns")
+}
+
 func TestCheckForFips(t *testing.T) {
 	assert := assert.New(t)
 

src/runtime/pkg/katautils/hook.go

@@ -16,6 +16,7 @@ import (
 	"time"
 
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils/katatrace"
+	syscallWrapper "github.com/kata-containers/kata-containers/src/runtime/pkg/syscall"
 	"github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/sirupsen/logrus"
 )
@@ -32,15 +33,16 @@ func hookLogger() *logrus.Entry {
 	return kataUtilsLogger.WithField("subsystem", "hook")
 }
 
-func runHook(ctx context.Context, hook specs.Hook, cid, bundlePath string) error {
+func runHook(ctx context.Context, spec specs.Spec, hook specs.Hook, cid, bundlePath string) error {
 	span, _ := katatrace.Trace(ctx, hookLogger(), "runHook", hookTracingTags)
 	defer span.End()
 	katatrace.AddTags(span, "path", hook.Path, "args", hook.Args)
 
 	state := specs.State{
-		Pid:    syscall.Gettid(),
-		Bundle: bundlePath,
-		ID:     cid,
+		Pid:         syscallWrapper.Gettid(),
+		Bundle:      bundlePath,
+		ID:          cid,
+		Annotations: spec.Annotations,
 	}
 
 	stateJSON, err := json.Marshal(state)
@@ -90,13 +92,13 @@ func runHook(ctx context.Context, hook specs.Hook, cid, bundlePath string) error
 	return nil
 }
 
-func runHooks(ctx context.Context, hooks []specs.Hook, cid, bundlePath, hookType string) error {
+func runHooks(ctx context.Context, spec specs.Spec, hooks []specs.Hook, cid, bundlePath, hookType string) error {
 	span, ctx := katatrace.Trace(ctx, hookLogger(), "runHooks", hookTracingTags)
 	katatrace.AddTags(span, "type", hookType)
 	defer span.End()
 
 	for _, hook := range hooks {
-		if err := runHook(ctx, hook, cid, bundlePath); err != nil {
+		if err := runHook(ctx, spec, hook, cid, bundlePath); err != nil {
 			hookLogger().WithFields(logrus.Fields{
 				"hook-type": hookType,
 				"error":     err,
@@ -109,6 +111,15 @@ func runHooks(ctx context.Context, hooks []specs.Hook, cid, bundlePath, hookType
 	return nil
 }
 
+func CreateRuntimeHooks(ctx context.Context, spec specs.Spec, cid, bundlePath string) error {
+	// If no hook available, nothing needs to be done.
+	if spec.Hooks == nil {
+		return nil
+	}
+
+	return runHooks(ctx, spec, spec.Hooks.CreateRuntime, cid, bundlePath, "createRuntime")
+}
+
 // PreStartHooks run the hooks before start container
 func PreStartHooks(ctx context.Context, spec specs.Spec, cid, bundlePath string) error {
 	// If no hook available, nothing needs to be done.
@@ -116,7 +127,7 @@ func PreStartHooks(ctx context.Context, spec specs.Spec, cid, bundlePath string)
 		return nil
 	}
 
-	return runHooks(ctx, spec.Hooks.Prestart, cid, bundlePath, "pre-start")
+	return runHooks(ctx, spec, spec.Hooks.Prestart, cid, bundlePath, "pre-start")
 }
 
 // PostStartHooks run the hooks just after start container
@@ -126,7 +137,7 @@ func PostStartHooks(ctx context.Context, spec specs.Spec, cid, bundlePath string
 		return nil
 	}
 
-	return runHooks(ctx, spec.Hooks.Poststart, cid, bundlePath, "post-start")
+	return runHooks(ctx, spec, spec.Hooks.Poststart, cid, bundlePath, "post-start")
 }
 
 // PostStopHooks run the hooks after stop container
@@ -136,5 +147,5 @@ func PostStopHooks(ctx context.Context, spec specs.Spec, cid, bundlePath string)
 		return nil
 	}
 
-	return runHooks(ctx, spec.Hooks.Poststop, cid, bundlePath, "post-stop")
+	return runHooks(ctx, spec, spec.Hooks.Poststop, cid, bundlePath, "post-stop")
 }

src/runtime/pkg/katautils/hook_test.go

@@ -57,26 +57,27 @@ func TestRunHook(t *testing.T) {
 	assert := assert.New(t)
 
 	ctx := context.Background()
+	spec := specs.Spec{}
 
 	// Run with timeout 0
 	hook := createHook(0)
-	err := runHook(ctx, hook, testSandboxID, testBundlePath)
+	err := runHook(ctx, spec, hook, testSandboxID, testBundlePath)
 	assert.NoError(err)
 
 	// Run with timeout 1
 	hook = createHook(1)
-	err = runHook(ctx, hook, testSandboxID, testBundlePath)
+	err = runHook(ctx, spec, hook, testSandboxID, testBundlePath)
 	assert.NoError(err)
 
 	// Run timeout failure
 	hook = createHook(1)
 	hook.Args = append(hook.Args, "2")
-	err = runHook(ctx, hook, testSandboxID, testBundlePath)
+	err = runHook(ctx, spec, hook, testSandboxID, testBundlePath)
 	assert.Error(err)
 
 	// Failure due to wrong hook
 	hook = createWrongHook()
-	err = runHook(ctx, hook, testSandboxID, testBundlePath)
+	err = runHook(ctx, spec, hook, testSandboxID, testBundlePath)
 	assert.Error(err)
 }
 

src/runtime/pkg/katautils/network_darwin.go

@@ -0,0 +1,22 @@
+// Copyright (c) 2022 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package katautils
+
+import (
+	vc "github.com/kata-containers/kata-containers/src/runtime/virtcontainers"
+)
+
+func EnterNetNS(networkID string, cb func() error) error {
+	return nil
+}
+
+func SetupNetworkNamespace(config *vc.NetworkConfig) error {
+	return nil
+}
+
+func cleanupNetNS(netNSPath string) error {
+	return nil
+}

src/runtime/pkg/oci/utils.go

@@ -23,6 +23,7 @@ import (
 	"github.com/sirupsen/logrus"
 	"k8s.io/apimachinery/pkg/api/resource"
 
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	vc "github.com/kata-containers/kata-containers/src/runtime/virtcontainers"
 
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
@@ -640,8 +641,8 @@ func addHypervisorCPUOverrides(ocispec specs.Spec, sbConfig *vc.SandboxConfig) e
 			return fmt.Errorf("Number of cpus %d in annotation default_maxvcpus is greater than the number of CPUs %d on the system", max, numCPUs)
 		}
 
-		if sbConfig.HypervisorType == vc.QemuHypervisor && max > vc.MaxQemuVCPUs() {
-			return fmt.Errorf("Number of cpus %d in annotation default_maxvcpus is greater than max no of CPUs %d supported for qemu", max, vc.MaxQemuVCPUs())
+		if sbConfig.HypervisorType == vc.QemuHypervisor && max > govmm.MaxVCPUs() {
+			return fmt.Errorf("Number of cpus %d in annotation default_maxvcpus is greater than max no of CPUs %d supported for qemu", max, govmm.MaxVCPUs())
 		}
 		sbConfig.HypervisorConfig.DefaultMaxVCPUs = max
 		return nil

src/runtime/pkg/resourcecontrol/cgroups.go

@@ -1,11 +1,15 @@
-// Copyright (c) 2021 Apple Inc.
+//go:build linux
+// +build linux
+
+// Copyright (c) 2021-2022 Apple Inc.
 //
 // SPDX-License-Identifier: Apache-2.0
 //
 
-package cgroups
+package resourcecontrol
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"sync"
@@ -16,7 +20,24 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-type Cgroup struct {
+// prepend a kata specific string to oci cgroup path to
+// form a different cgroup path, thus cAdvisor couldn't
+// find kata containers cgroup path on host to prevent it
+// from grabbing the stats data.
+const CgroupKataPrefix = "kata"
+
+func RenameCgroupPath(path string) (string, error) {
+	if path == "" {
+		path = DefaultResourceControllerID
+	}
+
+	cgroupPathDir := filepath.Dir(path)
+	cgroupPathName := fmt.Sprintf("%s_%s", CgroupKataPrefix, filepath.Base(path))
+	return filepath.Join(cgroupPathDir, cgroupPathName), nil
+
+}
+
+type LinuxCgroup struct {
 	cgroup  cgroups.Cgroup
 	path    string
 	cpusets *specs.LinuxCPU
@@ -25,17 +46,6 @@ type Cgroup struct {
 	sync.Mutex
 }
 
-var (
-	cgroupsLogger = logrus.WithField("source", "virtcontainers/pkg/cgroups")
-)
-
-// SetLogger sets up a logger for this pkg
-func SetLogger(logger *logrus.Entry) {
-	fields := cgroupsLogger.Data
-
-	cgroupsLogger = logger.WithFields(fields)
-}
-
 func sandboxDevices() []specs.LinuxDeviceCgroup {
 	devices := []specs.LinuxDeviceCgroup{}
 
@@ -65,7 +75,7 @@ func sandboxDevices() []specs.LinuxDeviceCgroup {
 	for _, device := range defaultDevices {
 		ldevice, err := DeviceToLinuxDevice(device)
 		if err != nil {
-			cgroupsLogger.WithField("source", "cgroups").Warnf("Could not add %s to the devices cgroup", device)
+			controllerLogger.WithField("source", "cgroups").Warnf("Could not add %s to the devices cgroup", device)
 			continue
 		}
 		devices = append(devices, ldevice)
@@ -116,7 +126,7 @@ func sandboxDevices() []specs.LinuxDeviceCgroup {
 	return devices
 }
 
-func NewCgroup(path string, resources *specs.LinuxResources) (*Cgroup, error) {
+func NewResourceController(path string, resources *specs.LinuxResources) (ResourceController, error) {
 	var err error
 
 	cgroupPath, err := ValidCgroupPath(path, IsSystemdCgroup(path))
@@ -129,7 +139,7 @@ func NewCgroup(path string, resources *specs.LinuxResources) (*Cgroup, error) {
 		return nil, err
 	}
 
-	return &Cgroup{
+	return &LinuxCgroup{
 		path:    cgroupPath,
 		devices: resources.Devices,
 		cpusets: resources.CPU,
@@ -137,7 +147,7 @@ func NewCgroup(path string, resources *specs.LinuxResources) (*Cgroup, error) {
 	}, nil
 }
 
-func NewSandboxCgroup(path string, resources *specs.LinuxResources, sandboxCgroupOnly bool) (*Cgroup, error) {
+func NewSandboxResourceController(path string, resources *specs.LinuxResources, sandboxCgroupOnly bool) (ResourceController, error) {
 	var cgroup cgroups.Cgroup
 	sandboxResources := *resources
 	sandboxResources.Devices = append(sandboxResources.Devices, sandboxDevices()...)
@@ -145,7 +155,7 @@ func NewSandboxCgroup(path string, resources *specs.LinuxResources, sandboxCgrou
 	// Currently we know to handle systemd cgroup path only when it's the only cgroup (no overhead group), hence,
 	// if sandboxCgroupOnly is not true we treat it as cgroupfs path as it used to be, although it may be incorrect
 	if !IsSystemdCgroup(path) || !sandboxCgroupOnly {
-		return NewCgroup(path, &sandboxResources)
+		return NewResourceController(path, &sandboxResources)
 	}
 
 	slice, unit, err := getSliceAndUnit(path)
@@ -174,7 +184,7 @@ func NewSandboxCgroup(path string, resources *specs.LinuxResources, sandboxCgrou
 		return nil, err
 	}
 
-	return &Cgroup{
+	return &LinuxCgroup{
 		path:    path,
 		devices: sandboxResources.Devices,
 		cpusets: sandboxResources.CPU,
@@ -182,7 +192,7 @@ func NewSandboxCgroup(path string, resources *specs.LinuxResources, sandboxCgrou
 	}, nil
 }
 
-func Load(path string) (*Cgroup, error) {
+func LoadResourceController(path string) (ResourceController, error) {
 	cgHierarchy, cgPath, err := cgroupHierarchy(path)
 	if err != nil {
 		return nil, err
@@ -193,37 +203,37 @@ func Load(path string) (*Cgroup, error) {
 		return nil, err
 	}
 
-	return &Cgroup{
+	return &LinuxCgroup{
 		path:   path,
 		cgroup: cgroup,
 	}, nil
 }
 
-func (c *Cgroup) Logger() *logrus.Entry {
-	return cgroupsLogger.WithField("source", "cgroups")
+func (c *LinuxCgroup) Logger() *logrus.Entry {
+	return controllerLogger.WithField("source", "cgroups")
 }
 
-func (c *Cgroup) Delete() error {
+func (c *LinuxCgroup) Delete() error {
 	return c.cgroup.Delete()
 }
 
-func (c *Cgroup) Stat() (*v1.Metrics, error) {
+func (c *LinuxCgroup) Stat() (*v1.Metrics, error) {
 	return c.cgroup.Stat(cgroups.ErrorHandler(cgroups.IgnoreNotExist))
 }
 
-func (c *Cgroup) AddProcess(pid int, subsystems ...string) error {
+func (c *LinuxCgroup) AddProcess(pid int, subsystems ...string) error {
 	return c.cgroup.Add(cgroups.Process{Pid: pid})
 }
 
-func (c *Cgroup) AddTask(pid int, subsystems ...string) error {
+func (c *LinuxCgroup) AddThread(pid int, subsystems ...string) error {
 	return c.cgroup.AddTask(cgroups.Process{Pid: pid})
 }
 
-func (c *Cgroup) Update(resources *specs.LinuxResources) error {
+func (c *LinuxCgroup) Update(resources *specs.LinuxResources) error {
 	return c.cgroup.Update(resources)
 }
 
-func (c *Cgroup) MoveTo(path string) error {
+func (c *LinuxCgroup) MoveTo(path string) error {
 	cgHierarchy, cgPath, err := cgroupHierarchy(path)
 	if err != nil {
 		return err
@@ -237,13 +247,7 @@ func (c *Cgroup) MoveTo(path string) error {
 	return c.cgroup.MoveTo(newCgroup)
 }
 
-func (c *Cgroup) MoveToParent() error {
-	parentPath := filepath.Dir(c.path)
-
-	return c.MoveTo(parentPath)
-}
-
-func (c *Cgroup) AddDevice(deviceHostPath string) error {
+func (c *LinuxCgroup) AddDevice(deviceHostPath string) error {
 	deviceResource, err := DeviceToLinuxDevice(deviceHostPath)
 	if err != nil {
 		return err
@@ -263,7 +267,7 @@ func (c *Cgroup) AddDevice(deviceHostPath string) error {
 	return nil
 }
 
-func (c *Cgroup) RemoveDevice(deviceHostPath string) error {
+func (c *LinuxCgroup) RemoveDevice(deviceHostPath string) error {
 	deviceResource, err := DeviceToLinuxDevice(deviceHostPath)
 	if err != nil {
 		return err
@@ -289,7 +293,7 @@ func (c *Cgroup) RemoveDevice(deviceHostPath string) error {
 	return nil
 }
 
-func (c *Cgroup) UpdateCpuSet(cpuset, memset string) error {
+func (c *LinuxCgroup) UpdateCpuSet(cpuset, memset string) error {
 	c.Lock()
 	defer c.Unlock()
 
@@ -316,6 +320,14 @@ func (c *Cgroup) UpdateCpuSet(cpuset, memset string) error {
 	})
 }
 
-func (c *Cgroup) Path() string {
+func (c *LinuxCgroup) Type() ResourceControllerType {
+	return LinuxCgroups
+}
+
+func (c *LinuxCgroup) ID() string {
 	return c.path
 }
+
+func (c *LinuxCgroup) Parent() string {
+	return filepath.Dir(c.path)
+}

src/runtime/pkg/resourcecontrol/controller.go

@@ -0,0 +1,82 @@
+// Copyright (c) 2021 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package resourcecontrol
+
+import (
+	v1 "github.com/containerd/cgroups/stats/v1"
+	"github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	controllerLogger = logrus.WithField("source", "virtcontainers/pkg/resourcecontrol")
+)
+
+// SetLogger sets up a logger for this pkg
+func SetLogger(logger *logrus.Entry) {
+	fields := controllerLogger.Data
+
+	controllerLogger = logger.WithFields(fields)
+}
+
+// HypervisorType describes an hypervisor type.
+type ResourceControllerType string
+
+const (
+	LinuxCgroups ResourceControllerType = "cgroups"
+)
+
+// String converts an hypervisor type to a string.
+func (rType *ResourceControllerType) String() string {
+	switch *rType {
+	case LinuxCgroups:
+		return string(LinuxCgroups)
+	default:
+		return "Unknown controller type"
+	}
+}
+
+// ResourceController represents a system resources controller.
+// On Linux this interface is implemented through the cgroups API.
+type ResourceController interface {
+	// Type returns the resource controller implementation type.
+	Type() ResourceControllerType
+
+	// The controller identifier, e.g. a Linux cgroups path.
+	ID() string
+
+	// Parent returns the parent controller, on hierarchically
+	// defined resource (e.g. Linux cgroups).
+	Parent() string
+
+	// Delete the controller.
+	Delete() error
+
+	// Stat returns the statistics for the controller.
+	Stat() (*v1.Metrics, error)
+
+	// AddProcess adds a process to a set of controllers.
+	AddProcess(int, ...string) error
+
+	// AddThread adds a process thread to a set of controllers.
+	AddThread(int, ...string) error
+
+	// Update updates the set of resources controlled, based on
+	// an OCI resources description.
+	Update(*specs.LinuxResources) error
+
+	// MoveTo moves a controller to another one.
+	MoveTo(string) error
+
+	// AddDevice adds a device resource to the controller.
+	AddDevice(string) error
+
+	// RemoveDevice removes a device resource to the controller.
+	RemoveDevice(string) error
+
+	// UpdateCpuSet updates the set of controlled CPUs and memory nodes.
+	UpdateCpuSet(string, string) error
+}

src/runtime/pkg/resourcecontrol/utils.go

@@ -0,0 +1,77 @@
+// Copyright (c) 2020 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package resourcecontrol
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/devices"
+	"github.com/opencontainers/runtime-spec/specs-go"
+	"golang.org/x/sys/unix"
+)
+
+func DeviceToCgroupDeviceRule(device string) (*devices.Rule, error) {
+	var st unix.Stat_t
+	deviceRule := devices.Rule{
+		Allow:       true,
+		Permissions: "rwm",
+	}
+
+	if err := unix.Stat(device, &st); err != nil {
+		return nil, err
+	}
+
+	devType := st.Mode & unix.S_IFMT
+
+	switch devType {
+	case unix.S_IFCHR:
+		deviceRule.Type = 'c'
+	case unix.S_IFBLK:
+		deviceRule.Type = 'b'
+	default:
+		return nil, fmt.Errorf("unsupported device type: %v", devType)
+	}
+
+	major := int64(unix.Major(uint64(st.Rdev)))
+	minor := int64(unix.Minor(uint64(st.Rdev)))
+	deviceRule.Major = major
+	deviceRule.Minor = minor
+
+	return &deviceRule, nil
+}
+
+func DeviceToLinuxDevice(device string) (specs.LinuxDeviceCgroup, error) {
+	dev, err := DeviceToCgroupDeviceRule(device)
+	if err != nil {
+		return specs.LinuxDeviceCgroup{}, err
+	}
+
+	return specs.LinuxDeviceCgroup{
+		Allow:  dev.Allow,
+		Type:   string(dev.Type),
+		Major:  &dev.Major,
+		Minor:  &dev.Minor,
+		Access: string(dev.Permissions),
+	}, nil
+}
+
+func IsSystemdCgroup(cgroupPath string) bool {
+
+	// If we are utilizing systemd to manage cgroups, we expect to receive a path
+	// in the format slice:scopeprefix:name. A typical example would be:
+	//
+	// system.slice:docker:6b4c4a4d0cc2a12c529dcb13a2b8e438dfb3b2a6af34d548d7d
+	//
+	// Based on this, let's split by the ':' delimiter and verify that the first
+	// section has .slice as a suffix.
+	parts := strings.Split(cgroupPath, ":")
+	if len(parts) == 3 && strings.HasSuffix(parts[0], ".slice") {
+		return true
+	}
+
+	return false
+}

src/runtime/pkg/resourcecontrol/utils_linux.go

@@ -3,7 +3,7 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-package cgroups
+package resourcecontrol
 
 import (
 	"context"
@@ -15,30 +15,10 @@ import (
 	systemdDbus "github.com/coreos/go-systemd/v22/dbus"
 	"github.com/godbus/dbus/v5"
 	"github.com/opencontainers/runc/libcontainer/cgroups/systemd"
-	"github.com/opencontainers/runc/libcontainer/devices"
-	"github.com/opencontainers/runtime-spec/specs-go"
-	"golang.org/x/sys/unix"
 )
 
-// prepend a kata specific string to oci cgroup path to
-// form a different cgroup path, thus cAdvisor couldn't
-// find kata containers cgroup path on host to prevent it
-// from grabbing the stats data.
-const CgroupKataPrefix = "kata"
-
-// DefaultCgroupPath runtime-determined location in the cgroups hierarchy.
-const DefaultCgroupPath = "/vc"
-
-func RenameCgroupPath(path string) (string, error) {
-	if path == "" {
-		path = DefaultCgroupPath
-	}
-
-	cgroupPathDir := filepath.Dir(path)
-	cgroupPathName := fmt.Sprintf("%s_%s", CgroupKataPrefix, filepath.Base(path))
-	return filepath.Join(cgroupPathDir, cgroupPathName), nil
-
-}
+// DefaultResourceControllerID runtime-determined location in the cgroups hierarchy.
+const DefaultResourceControllerID = "/vc"
 
 // validCgroupPath returns a valid cgroup path.
 // see https://github.com/opencontainers/runtime-spec/blob/master/config-linux.md#cgroups-path
@@ -59,25 +39,8 @@ func ValidCgroupPath(path string, systemdCgroup bool) (string, error) {
 
 	// In the case of a relative path (not starting with /), the runtime MAY
 	// interpret the path relative to a runtime-determined location in the cgroups hierarchy.
-	// clean up path and return a new path relative to DefaultCgroupPath
-	return filepath.Join(DefaultCgroupPath, filepath.Clean("/"+path)), nil
-}
-
-func IsSystemdCgroup(cgroupPath string) bool {
-
-	// If we are utilizing systemd to manage cgroups, we expect to receive a path
-	// in the format slice:scopeprefix:name. A typical example would be:
-	//
-	// system.slice:docker:6b4c4a4d0cc2a12c529dcb13a2b8e438dfb3b2a6af34d548d7d
-	//
-	// Based on this, let's split by the ':' delimiter and verify that the first
-	// section has .slice as a suffix.
-	parts := strings.Split(cgroupPath, ":")
-	if len(parts) == 3 && strings.HasSuffix(parts[0], ".slice") {
-		return true
-	}
-
-	return false
+	// clean up path and return a new path relative to DefaultResourceControllerID
+	return filepath.Join(DefaultResourceControllerID, filepath.Clean("/"+path)), nil
 }
 
 func newProperty(name string, units interface{}) systemdDbus.Property {
@@ -149,48 +112,3 @@ func getSliceAndUnit(cgroupPath string) (string, string, error) {
 
 	return "", "", fmt.Errorf("Path: %s is not valid systemd's cgroups path", cgroupPath)
 }
-
-func DeviceToCgroupDeviceRule(device string) (*devices.Rule, error) {
-	var st unix.Stat_t
-	deviceRule := devices.Rule{
-		Allow:       true,
-		Permissions: "rwm",
-	}
-
-	if err := unix.Stat(device, &st); err != nil {
-		return nil, err
-	}
-
-	devType := st.Mode & unix.S_IFMT
-
-	switch devType {
-	case unix.S_IFCHR:
-		deviceRule.Type = 'c'
-	case unix.S_IFBLK:
-		deviceRule.Type = 'b'
-	default:
-		return nil, fmt.Errorf("unsupported device type: %v", devType)
-	}
-
-	major := int64(unix.Major(st.Rdev))
-	minor := int64(unix.Minor(st.Rdev))
-	deviceRule.Major = major
-	deviceRule.Minor = minor
-
-	return &deviceRule, nil
-}
-
-func DeviceToLinuxDevice(device string) (specs.LinuxDeviceCgroup, error) {
-	dev, err := DeviceToCgroupDeviceRule(device)
-	if err != nil {
-		return specs.LinuxDeviceCgroup{}, err
-	}
-
-	return specs.LinuxDeviceCgroup{
-		Allow:  dev.Allow,
-		Type:   string(dev.Type),
-		Major:  &dev.Major,
-		Minor:  &dev.Minor,
-		Access: string(dev.Permissions),
-	}, nil
-}

src/runtime/pkg/resourcecontrol/utils_linux_test.go

@@ -3,7 +3,7 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-package cgroups
+package resourcecontrol
 
 import (
 	"os"
@@ -99,8 +99,8 @@ func TestValidCgroupPath(t *testing.T) {
 			assert.Equal(t.path, path)
 		} else {
 			assert.True(
-				strings.HasPrefix(path, DefaultCgroupPath),
-				"%v should have prefix /%v", path, DefaultCgroupPath)
+				strings.HasPrefix(path, DefaultResourceControllerID),
+				"%v should have prefix /%v", path, DefaultResourceControllerID)
 		}
 	}
 

src/runtime/pkg/syscall/syscall_darwin.go

@@ -0,0 +1,16 @@
+// Copyright (c) 2022 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package syscall
+
+import (
+	"syscall"
+)
+
+func Gettid() int {
+	// There is no equivalent to a thread ID on Darwin.
+	// We use the PID instead.
+	return syscall.Getpid()
+}

src/runtime/pkg/syscall/syscall_linux.go

@@ -0,0 +1,14 @@
+// Copyright (c) 2022 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package syscall
+
+import (
+	"syscall"
+)
+
+func Gettid() int {
+	return syscall.Gettid()
+}

src/runtime/vendor/code.cloudfoundry.org/bytefmt/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

src/runtime/vendor/code.cloudfoundry.org/bytefmt/NOTICE

@@ -0,0 +1,20 @@
+Copyright (c) 2015-Present CloudFoundry.org Foundation, Inc. All Rights Reserved.
+
+This project contains software that is Copyright (c) 2013-2015 Pivotal Software, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+This project may include a number of subcomponents with separate
+copyright notices and license terms. Your use of these subcomponents
+is subject to the terms and conditions of each subcomponent's license,
+as noted in the LICENSE file.

src/runtime/vendor/code.cloudfoundry.org/bytefmt/README.md

@@ -0,0 +1,19 @@
+bytefmt
+=======
+
+**Note**: This repository should be imported as `code.cloudfoundry.org/bytefmt`.
+
+Human-readable byte formatter.
+
+Example:
+
+```go
+bytefmt.ByteSize(100.5*bytefmt.MEGABYTE) // returns "100.5M"
+bytefmt.ByteSize(uint64(1024)) // returns "1K"
+```
+
+For documentation, please see http://godoc.org/code.cloudfoundry.org/bytefmt
+
+## Reporting issues and requesting features
+
+Please report all issues and feature requests in [cloudfoundry/diego-release](https://github.com/cloudfoundry/diego-release/issues).

src/runtime/vendor/code.cloudfoundry.org/bytefmt/bytes.go

@@ -0,0 +1,121 @@
+// Package bytefmt contains helper methods and constants for converting to and from a human-readable byte format.
+//
+//	bytefmt.ByteSize(100.5*bytefmt.MEGABYTE) // "100.5M"
+//	bytefmt.ByteSize(uint64(1024)) // "1K"
+//
+package bytefmt
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+const (
+	BYTE = 1 << (10 * iota)
+	KILOBYTE
+	MEGABYTE
+	GIGABYTE
+	TERABYTE
+	PETABYTE
+	EXABYTE
+)
+
+var invalidByteQuantityError = errors.New("byte quantity must be a positive integer with a unit of measurement like M, MB, MiB, G, GiB, or GB")
+
+// ByteSize returns a human-readable byte string of the form 10M, 12.5K, and so forth.  The following units are available:
+//	E: Exabyte
+//	P: Petabyte
+//	T: Terabyte
+//	G: Gigabyte
+//	M: Megabyte
+//	K: Kilobyte
+//	B: Byte
+// The unit that results in the smallest number greater than or equal to 1 is always chosen.
+func ByteSize(bytes uint64) string {
+	unit := ""
+	value := float64(bytes)
+
+	switch {
+	case bytes >= EXABYTE:
+		unit = "E"
+		value = value / EXABYTE
+	case bytes >= PETABYTE:
+		unit = "P"
+		value = value / PETABYTE
+	case bytes >= TERABYTE:
+		unit = "T"
+		value = value / TERABYTE
+	case bytes >= GIGABYTE:
+		unit = "G"
+		value = value / GIGABYTE
+	case bytes >= MEGABYTE:
+		unit = "M"
+		value = value / MEGABYTE
+	case bytes >= KILOBYTE:
+		unit = "K"
+		value = value / KILOBYTE
+	case bytes >= BYTE:
+		unit = "B"
+	case bytes == 0:
+		return "0B"
+	}
+
+	result := strconv.FormatFloat(value, 'f', 1, 64)
+	result = strings.TrimSuffix(result, ".0")
+	return result + unit
+}
+
+// ToMegabytes parses a string formatted by ByteSize as megabytes.
+func ToMegabytes(s string) (uint64, error) {
+	bytes, err := ToBytes(s)
+	if err != nil {
+		return 0, err
+	}
+
+	return bytes / MEGABYTE, nil
+}
+
+// ToBytes parses a string formatted by ByteSize as bytes. Note binary-prefixed and SI prefixed units both mean a base-2 units
+// KB = K = KiB	= 1024
+// MB = M = MiB = 1024 * K
+// GB = G = GiB = 1024 * M
+// TB = T = TiB = 1024 * G
+// PB = P = PiB = 1024 * T
+// EB = E = EiB = 1024 * P
+func ToBytes(s string) (uint64, error) {
+	s = strings.TrimSpace(s)
+	s = strings.ToUpper(s)
+
+	i := strings.IndexFunc(s, unicode.IsLetter)
+
+	if i == -1 {
+		return 0, invalidByteQuantityError
+	}
+
+	bytesString, multiple := s[:i], s[i:]
+	bytes, err := strconv.ParseFloat(bytesString, 64)
+	if err != nil || bytes < 0 {
+		return 0, invalidByteQuantityError
+	}
+
+	switch multiple {
+	case "E", "EB", "EIB":
+		return uint64(bytes * EXABYTE), nil
+	case "P", "PB", "PIB":
+		return uint64(bytes * PETABYTE), nil
+	case "T", "TB", "TIB":
+		return uint64(bytes * TERABYTE), nil
+	case "G", "GB", "GIB":
+		return uint64(bytes * GIGABYTE), nil
+	case "M", "MB", "MIB":
+		return uint64(bytes * MEGABYTE), nil
+	case "K", "KB", "KIB":
+		return uint64(bytes * KILOBYTE), nil
+	case "B":
+		return uint64(bytes), nil
+	default:
+		return 0, invalidByteQuantityError
+	}
+}

src/runtime/vendor/code.cloudfoundry.org/bytefmt/go.mod

@@ -0,0 +1,8 @@
+module code.cloudfoundry.org/bytefmt
+
+go 1.16
+
+require (
+	github.com/onsi/ginkgo v1.16.4
+	github.com/onsi/gomega v1.16.0
+)

src/runtime/vendor/code.cloudfoundry.org/bytefmt/go.sum

@@ -0,0 +1,93 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
+github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
+github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
+github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
+github.com/onsi/ginkgo v1.16.4 h1:29JGrr5oVBm5ulCWet69zQkzWipVXIol6ygQUe/EzNc=
+github.com/onsi/ginkgo v1.16.4/go.mod h1:dX+/inL/fNMqNlz0e9LfyB9TswhZpCVdJM/Z6Vvnwo0=
+github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
+github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
+github.com/onsi/gomega v1.16.0 h1:6gjqkI8iiRHMvdccRJM8rVKjCWk6ZIm6FTm3ddIe4/c=
+github.com/onsi/gomega v1.16.0/go.mod h1:HnhC7FXeEQY45zxNK3PPoIUhzk/80Xly9PcubAlGdZY=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20210428140749-89ef3d95e781 h1:DzZ89McO9/gWPsQXS/FVKAlG02ZjaQ6AlZRBimEYOd0=
+golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da h1:b3NXsE2LusjYGGjL5bxEVZZORm/YEFFrWFjR8eFrw/c=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

src/runtime/vendor/code.cloudfoundry.org/bytefmt/package.go

@@ -0,0 +1 @@
+package bytefmt // import "code.cloudfoundry.org/bytefmt"

src/runtime/vendor/modules.txt

@@ -1,3 +1,6 @@
+# code.cloudfoundry.org/bytefmt v0.0.0-20211005130812-5bb3c17173e5
+## explicit
+code.cloudfoundry.org/bytefmt
 # github.com/BurntSushi/toml v0.3.1
 ## explicit
 github.com/BurntSushi/toml

src/runtime/virtcontainers/acrn.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/acrn_arch_base.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/acrn_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/agent.go

@@ -177,7 +177,7 @@ type agent interface {
 	markDead(ctx context.Context)
 
 	// cleanup removes all on disk information generated by the agent
-	cleanup(ctx context.Context, s *Sandbox)
+	cleanup(ctx context.Context)
 
 	// return data for saving
 	save() persistapi.AgentState

src/runtime/virtcontainers/api.go

@@ -10,9 +10,9 @@ import (
 	"runtime"
 
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils/katatrace"
+	resCtrl "github.com/kata-containers/kata-containers/src/runtime/pkg/resourcecontrol"
 	deviceApi "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/api"
 	deviceConfig "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
-	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/cgroups"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/compatoci"
 	vcTypes "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
 	"github.com/sirupsen/logrus"
@@ -39,7 +39,7 @@ func SetLogger(ctx context.Context, logger *logrus.Entry) {
 	deviceApi.SetLogger(virtLog)
 	compatoci.SetLogger(virtLog)
 	deviceConfig.SetLogger(virtLog)
-	cgroups.SetLogger(virtLog)
+	resCtrl.SetLogger(virtLog)
 }
 
 // CreateSandbox is the virtcontainers sandbox creation entry point.
@@ -83,7 +83,7 @@ func createSandboxFromConfig(ctx context.Context, sandboxConfig SandboxConfig, f
 	}()
 
 	// Set the sandbox host cgroups.
-	if err := s.setupCgroups(); err != nil {
+	if err := s.setupResourceController(); err != nil {
 		return nil, err
 	}
 

src/runtime/virtcontainers/api_test.go

@@ -15,9 +15,9 @@ import (
 	"testing"
 
 	ktu "github.com/kata-containers/kata-containers/src/runtime/pkg/katatestutils"
+	resCtrl "github.com/kata-containers/kata-containers/src/runtime/pkg/resourcecontrol"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/persist/fs"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/annotations"
-	vccgroups "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/cgroups"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/mock"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/rootless"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
@@ -49,7 +49,7 @@ func newEmptySpec() *specs.Spec {
 	return &specs.Spec{
 		Linux: &specs.Linux{
 			Resources:   &specs.LinuxResources{},
-			CgroupsPath: vccgroups.DefaultCgroupPath,
+			CgroupsPath: resCtrl.DefaultResourceControllerID,
 		},
 		Process: &specs.Process{
 			Capabilities: &specs.LinuxCapabilities{},
@@ -170,10 +170,10 @@ func TestCreateSandboxKataAgentSuccessful(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
-	MockHybridVSockPath = url
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
-	err = hybridVSockTTRPCMock.Start(fmt.Sprintf("mock://%s", url))
+	err = hybridVSockTTRPCMock.Start(url)
 	assert.NoError(err)
 	defer hybridVSockTTRPCMock.Stop()
 

src/runtime/virtcontainers/clh.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2019 Ericsson Eurolab Deutschland GmbH
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -168,12 +171,9 @@ type cloudHypervisor struct {
 }
 
 var clhKernelParams = []Param{
-	{"root", "/dev/pmem0p1"},
 	{"panic", "1"},         // upon kernel panic wait 1 second before reboot
 	{"no_timer_check", ""}, // do not Check broken timer IRQ resources
 	{"noreplace-smp", ""},  // do not replace SMP instructions
-	{"rootflags", "dax,data=ordered,errors=remount-ro ro"}, // mount the root filesystem as readonly
-	{"rootfstype", "ext4"},
 }
 
 var clhDebugKernelParams = []Param{
@@ -202,6 +202,34 @@ func (clh *cloudHypervisor) nydusdAPISocketPath(id string) (string, error) {
 	return utils.BuildSocketPath(clh.config.VMStorePath, id, nydusdAPISock)
 }
 
+func (clh *cloudHypervisor) enableProtection() error {
+	protection, err := availableGuestProtection()
+	if err != nil {
+		return err
+	}
+
+	switch protection {
+	case tdxProtection:
+		firmwarePath, err := clh.config.FirmwareAssetPath()
+		if err != nil {
+			return err
+		}
+
+		if firmwarePath == "" {
+			return errors.New("Firmware path is not specified")
+		}
+
+		clh.vmconfig.Tdx = chclient.NewTdxConfig(firmwarePath)
+		return nil
+
+	case sevProtection:
+		return errors.New("SEV protection is not supported by Cloud Hypervisor")
+
+	default:
+		return errors.New("This system doesn't support Confidentian Computing (Guest Protection)")
+	}
+}
+
 // For cloudHypervisor this call only sets the internal structure up.
 // The VM will be created and started through StartVM().
 func (clh *cloudHypervisor) CreateVM(ctx context.Context, id string, network Network, hypervisorConfig *HypervisorConfig) error {
@@ -248,23 +276,35 @@ func (clh *cloudHypervisor) CreateVM(ctx context.Context, id string, network Net
 	// Create the VM config via the constructor to ensure default values are properly assigned
 	clh.vmconfig = *chclient.NewVmConfig(*chclient.NewKernelConfig(kernelPath))
 
+	if clh.config.ConfidentialGuest {
+		if err := clh.enableProtection(); err != nil {
+			return err
+		}
+	}
+
 	// Create the VM memory config via the constructor to ensure default values are properly assigned
 	clh.vmconfig.Memory = chclient.NewMemoryConfig(int64((utils.MemUnit(clh.config.MemorySize) * utils.MiB).ToBytes()))
 	// shared memory should be enabled if using vhost-user(kata uses virtiofsd)
 	clh.vmconfig.Memory.Shared = func(b bool) *bool { return &b }(true)
 	// Enable hugepages if needed
 	clh.vmconfig.Memory.Hugepages = func(b bool) *bool { return &b }(clh.config.HugePages)
-	hostMemKb, err := GetHostMemorySizeKb(procMemInfo)
-	if err != nil {
-		return nil
+	if !clh.config.ConfidentialGuest {
+		hostMemKb, err := GetHostMemorySizeKb(procMemInfo)
+		if err != nil {
+			return nil
+		}
+		// OpenAPI only supports int64 values
+		clh.vmconfig.Memory.HotplugSize = func(i int64) *int64 { return &i }(int64((utils.MemUnit(hostMemKb) * utils.KiB).ToBytes()))
 	}
-	// OpenAPI only supports int64 values
-	clh.vmconfig.Memory.HotplugSize = func(i int64) *int64 { return &i }(int64((utils.MemUnit(hostMemKb) * utils.KiB).ToBytes()))
 	// Set initial amount of cpu's for the virtual machine
 	clh.vmconfig.Cpus = chclient.NewCpusConfig(int32(clh.config.NumVCPUs), int32(clh.config.DefaultMaxVCPUs))
 
 	// First take the default parameters defined by this driver
-	params := clhKernelParams
+	params := commonNvdimmKernelRootParams
+	if clh.config.ConfidentialGuest {
+		params = commonVirtioblkKernelRootParams
+	}
+	params = append(params, clhKernelParams...)
 
 	// Followed by extra debug parameters if debug enabled in configuration file
 	if clh.config.Debug {
@@ -288,26 +328,35 @@ func (clh *cloudHypervisor) CreateVM(ctx context.Context, id string, network Net
 		return err
 	}
 
-	initrdPath, err := clh.config.InitrdAssetPath()
-	if err != nil {
-		return err
-	}
-
 	if imagePath != "" {
-		pmem := chclient.NewPmemConfig(imagePath)
-		*pmem.DiscardWrites = true
+		if clh.config.ConfidentialGuest {
+			disk := chclient.NewDiskConfig(imagePath)
+			disk.SetReadonly(true)
 
-		if clh.vmconfig.Pmem != nil {
-			*clh.vmconfig.Pmem = append(*clh.vmconfig.Pmem, *pmem)
+			if clh.vmconfig.Disks != nil {
+				*clh.vmconfig.Disks = append(*clh.vmconfig.Disks, *disk)
+			} else {
+				clh.vmconfig.Disks = &[]chclient.DiskConfig{*disk}
+			}
 		} else {
-			clh.vmconfig.Pmem = &[]chclient.PmemConfig{*pmem}
+			pmem := chclient.NewPmemConfig(imagePath)
+			*pmem.DiscardWrites = true
+
+			if clh.vmconfig.Pmem != nil {
+				*clh.vmconfig.Pmem = append(*clh.vmconfig.Pmem, *pmem)
+			} else {
+				clh.vmconfig.Pmem = &[]chclient.PmemConfig{*pmem}
+			}
 		}
-	} else if initrdPath != "" {
+	} else {
+		initrdPath, err := clh.config.InitrdAssetPath()
+		if err != nil {
+			return err
+		}
+
 		initrd := chclient.NewInitramfsConfig(initrdPath)
 
 		clh.vmconfig.SetInitramfs(*initrd)
-	} else {
-		return errors.New("no image or initrd specified")
 	}
 
 	// Use serial port as the guest console only in debug mode,
@@ -420,10 +469,13 @@ func (clh *cloudHypervisor) StartVM(ctx context.Context, timeout int) error {
 	// virtiofsd are executed by kata-runtime after this call, run with
 	// the SELinux label. If these processes require privileged, we do
 	// notwant to run them under confinement.
-	if err := label.SetProcessLabel(clh.config.SELinuxProcessLabel); err != nil {
-		return err
+	if !clh.config.DisableSeLinux {
+
+		if err := label.SetProcessLabel(clh.config.SELinuxProcessLabel); err != nil {
+			return err
+		}
+		defer label.SetProcessLabel("")
 	}
-	defer label.SetProcessLabel("")
 
 	if clh.config.SharedFS == config.VirtioFS || clh.config.SharedFS == config.VirtioFSNydus {
 		clh.Logger().WithField("function", "StartVM").Info("Starting virtiofsDaemon")
@@ -586,6 +638,10 @@ func (clh *cloudHypervisor) HotplugAddDevice(ctx context.Context, devInfo interf
 	span, _ := katatrace.Trace(ctx, clh.Logger(), "HotplugAddDevice", clhTracingTags, map[string]string{"sandbox_id": clh.id})
 	defer span.End()
 
+	if clh.config.ConfidentialGuest {
+		return nil, errors.New("Device hotplug addition is not supported in confidential mode")
+	}
+
 	switch devType {
 	case BlockDev:
 		drive := devInfo.(*config.BlockDrive)
@@ -603,6 +659,10 @@ func (clh *cloudHypervisor) HotplugRemoveDevice(ctx context.Context, devInfo int
 	span, _ := katatrace.Trace(ctx, clh.Logger(), "HotplugRemoveDevice", clhTracingTags, map[string]string{"sandbox_id": clh.id})
 	defer span.End()
 
+	if clh.config.ConfidentialGuest {
+		return nil, errors.New("Device hotplug removal is not supported in confidential mode")
+	}
+
 	var deviceID string
 
 	switch devType {
@@ -857,7 +917,9 @@ func (clh *cloudHypervisor) Capabilities(ctx context.Context) types.Capabilities
 	clh.Logger().WithField("function", "Capabilities").Info("get Capabilities")
 	var caps types.Capabilities
 	caps.SetFsSharingSupport()
-	caps.SetBlockDeviceHotplugSupport()
+	if !clh.config.ConfidentialGuest {
+		caps.SetBlockDeviceHotplugSupport()
+	}
 	return caps
 }
 

src/runtime/virtcontainers/clh_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2019 Ericsson Eurolab Deutschland G.m.b.H.
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/container.go

@@ -1,6 +1,3 @@
-//go:build linux
-// +build linux
-
 // Copyright (c) 2016 Intel Corporation
 // Copyright (c) 2014,2015,2016,2017 Docker, Inc.
 // SPDX-License-Identifier: Apache-2.0
@@ -10,7 +7,6 @@ package virtcontainers
 
 import (
 	"context"
-	"encoding/hex"
 	"fmt"
 	"io"
 	"os"
@@ -29,7 +25,6 @@ import (
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/utils"
 
 	specs "github.com/opencontainers/runtime-spec/specs-go"
-	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"golang.org/x/sys/unix"
 )
@@ -356,6 +351,7 @@ func (c *Container) Logger() *logrus.Entry {
 	return virtLog.WithFields(logrus.Fields{
 		"subsystem": "container",
 		"sandbox":   c.sandboxID,
+		"container": c.id,
 	})
 }
 
@@ -422,72 +418,6 @@ func (c *Container) setContainerState(state types.StateString) error {
 	return nil
 }
 
-func (c *Container) shareFiles(ctx context.Context, m Mount, idx int) (string, bool, error) {
-	randBytes, err := utils.GenerateRandomBytes(8)
-	if err != nil {
-		return "", false, err
-	}
-
-	filename := fmt.Sprintf("%s-%s-%s", c.id, hex.EncodeToString(randBytes), filepath.Base(m.Destination))
-	guestDest := filepath.Join(kataGuestSharedDir(), filename)
-
-	// copy file to contaier's rootfs if filesystem sharing is not supported, otherwise
-	// bind mount it in the shared directory.
-	caps := c.sandbox.hypervisor.Capabilities(ctx)
-	if !caps.IsFsSharingSupported() {
-		c.Logger().Debug("filesystem sharing is not supported, files will be copied")
-
-		fileInfo, err := os.Stat(m.Source)
-		if err != nil {
-			return "", false, err
-		}
-
-		// Ignore the mount if this is not a regular file (excludes
-		// directory, socket, device, ...) as it cannot be handled by
-		// a simple copy. But this should not be treated as an error,
-		// only as a limitation.
-		if !fileInfo.Mode().IsRegular() {
-			c.Logger().WithField("ignored-file", m.Source).Debug("Ignoring non-regular file as FS sharing not supported")
-			return "", true, nil
-		}
-
-		if err := c.sandbox.agent.copyFile(ctx, m.Source, guestDest); err != nil {
-			return "", false, err
-		}
-	} else {
-		// These mounts are created in the shared dir
-		mountDest := filepath.Join(getMountPath(c.sandboxID), filename)
-		if !m.ReadOnly {
-			if err := bindMount(c.ctx, m.Source, mountDest, false, "private"); err != nil {
-				return "", false, err
-			}
-		} else {
-			// For RO mounts, bindmount remount event is not propagated to mount subtrees,
-			// and it doesn't present in the virtiofsd standalone mount namespace either.
-			// So we end up a bit tricky:
-			// 1. make a private ro bind mount to the mount source
-			// 2. duplicate the ro mount we create in step 1 to mountDest, by making a bind mount. No need to remount with MS_RDONLY here.
-			// 3. umount the private bind mount created in step 1
-			privateDest := filepath.Join(getPrivatePath(c.sandboxID), filename)
-
-			if err := bindMount(c.ctx, m.Source, privateDest, true, "private"); err != nil {
-				return "", false, err
-			}
-			defer func() {
-				syscall.Unmount(privateDest, syscall.MNT_DETACH|UmountNoFollow)
-			}()
-
-			if err := bindMount(c.ctx, privateDest, mountDest, false, "private"); err != nil {
-				return "", false, err
-			}
-		}
-		// Save HostPath mount value into the mount list of the container.
-		c.mounts[idx].HostPath = mountDest
-	}
-
-	return guestDest, false, nil
-}
-
 // mountSharedDirMounts handles bind-mounts by bindmounting to the host shared
 // directory which is mounted through virtiofs/9pfs in the VM.
 // It also updates the container mount list with the HostPath info, and store
@@ -502,6 +432,7 @@ func (c *Container) mountSharedDirMounts(ctx context.Context, sharedDirMounts, i
 			}
 		}
 	}()
+
 	for idx, m := range c.mounts {
 		// Skip mounting certain system paths from the source on the host side
 		// into the container as it does not make sense to do so.
@@ -540,20 +471,18 @@ func (c *Container) mountSharedDirMounts(ctx context.Context, sharedDirMounts, i
 			continue
 		}
 
-		var ignore bool
-		var guestDest string
-		guestDest, ignore, err = c.shareFiles(ctx, m, idx)
+		sharedFile, err := c.sandbox.fsShare.ShareFile(ctx, c, &c.mounts[idx])
 		if err != nil {
 			return storages, err
 		}
 
 		// Expand the list of mounts to ignore.
-		if ignore {
+		if sharedFile == nil {
 			ignoredMounts[m.Source] = Mount{Source: m.Source}
 			continue
 		}
 		sharedDirMount := Mount{
-			Source:      guestDest,
+			Source:      sharedFile.guestPath,
 			Destination: m.Destination,
 			Type:        m.Type,
 			Options:     m.Options,
@@ -580,11 +509,11 @@ func (c *Container) mountSharedDirMounts(ctx context.Context, sharedDirMounts, i
 				return storages, fmt.Errorf("unable to create watchable path: %s: %v", watchableHostPath, err)
 			}
 
-			watchableGuestMount := filepath.Join(kataGuestSharedDir(), "watchable", filepath.Base(guestDest))
+			watchableGuestMount := filepath.Join(kataGuestSharedDir(), "watchable", filepath.Base(sharedFile.guestPath))
 
 			storage := &grpc.Storage{
 				Driver:     kataWatchableBindDevType,
-				Source:     guestDest,
+				Source:     sharedFile.guestPath,
 				Fstype:     "bind",
 				MountPoint: watchableGuestMount,
 				Options:    m.Options,
@@ -615,7 +544,7 @@ func (c *Container) unmountHostMounts(ctx context.Context) error {
 			span.End()
 		}()
 
-		if err = syscall.Unmount(m.HostPath, syscall.MNT_DETACH|UmountNoFollow); err != nil {
+		if err = c.sandbox.fsShare.UnshareFile(ctx, c, &m); err != nil {
 			c.Logger().WithFields(logrus.Fields{
 				"host-path": m.HostPath,
 				"error":     err,
@@ -623,19 +552,6 @@ func (c *Container) unmountHostMounts(ctx context.Context) error {
 			return err
 		}
 
-		if m.Type == "bind" {
-			s, err := os.Stat(m.HostPath)
-			if err != nil {
-				return errors.Wrapf(err, "Could not stat host-path %v", m.HostPath)
-			}
-			// Remove the empty file or directory
-			if s.Mode().IsRegular() && s.Size() == 0 {
-				os.Remove(m.HostPath)
-			}
-			if s.Mode().IsDir() {
-				syscall.Rmdir(m.HostPath)
-			}
-		}
 		return nil
 	}
 
@@ -710,8 +626,8 @@ func (c *Container) createBlockDevices(ctx context.Context) error {
 				HostPath:      m.Source,
 				ContainerPath: m.Destination,
 				DevType:       "b",
-				Major:         int64(unix.Major(stat.Rdev)),
-				Minor:         int64(unix.Minor(stat.Rdev)),
+				Major:         int64(unix.Major(uint64(stat.Rdev))),
+				Minor:         int64(unix.Minor(uint64(stat.Rdev))),
 				ReadOnly:      m.ReadOnly,
 			}
 			// Check whether source can be used as a pmem device
@@ -866,8 +782,8 @@ func (c *Container) rollbackFailingContainerCreation(ctx context.Context) {
 			c.Logger().WithError(err).Error("rollback failed nydusContainerCleanup()")
 		}
 	} else {
-		if err := bindUnmountContainerRootfs(ctx, getMountPath(c.sandbox.id), c.id); err != nil {
-			c.Logger().WithError(err).Error("rollback failed bindUnmountContainerRootfs()")
+		if err := c.sandbox.fsShare.UnshareRootFilesystem(ctx, c); err != nil {
+			c.Logger().WithError(err).Error("rollback failed UnshareRootFilesystem()")
 		}
 	}
 }
@@ -1050,7 +966,7 @@ func (c *Container) stop(ctx context.Context, force bool) error {
 			return err
 		}
 	} else {
-		if err := bindUnmountContainerRootfs(ctx, getMountPath(c.sandbox.id), c.id); err != nil && !force {
+		if err := c.sandbox.fsShare.UnshareRootFilesystem(ctx, c); err != nil && !force {
 			return err
 		}
 	}
@@ -1063,11 +979,6 @@ func (c *Container) stop(ctx context.Context, force bool) error {
 		return err
 	}
 
-	shareDir := filepath.Join(getMountPath(c.sandbox.id), c.id)
-	if err := syscall.Rmdir(shareDir); err != nil {
-		c.Logger().WithError(err).WithField("share-dir", shareDir).Warn("Could not remove container share dir")
-	}
-
 	// container was killed by force, container MUST change its state
 	// as soon as possible just in case one of below operations fail leaving
 	// the containers in a bad state.
@@ -1317,8 +1228,8 @@ func (c *Container) plugDevice(ctx context.Context, devicePath string) error {
 			HostPath:      devicePath,
 			ContainerPath: filepath.Join(kataGuestSharedDir(), c.id),
 			DevType:       "b",
-			Major:         int64(unix.Major(stat.Rdev)),
-			Minor:         int64(unix.Minor(stat.Rdev)),
+			Major:         int64(unix.Major(uint64(stat.Rdev))),
+			Minor:         int64(unix.Minor(uint64(stat.Rdev))),
 		})
 		if err != nil {
 			return fmt.Errorf("device manager failed to create rootfs device for %q: %v", devicePath, err)

src/runtime/virtcontainers/container_test.go

@@ -146,7 +146,7 @@ func TestUnmountHostMountsRemoveBindHostPath(t *testing.T) {
 		return f.Name()
 	}
 
-	doUnmountCheck := func(src, dest, hostPath, nonEmptyHostpath, devPath string) {
+	doUnmountCheck := func(s *Sandbox, src, dest, hostPath, nonEmptyHostpath, devPath string) {
 		mounts := []Mount{
 			{
 				Source:      src,
@@ -169,8 +169,10 @@ func TestUnmountHostMountsRemoveBindHostPath(t *testing.T) {
 		}
 
 		c := Container{
-			mounts: mounts,
-			ctx:    context.Background(),
+			mounts:  mounts,
+			ctx:     context.Background(),
+			id:      "fooabr",
+			sandbox: s,
 		}
 
 		if err := bindMount(c.ctx, src, hostPath, false, "private"); err != nil {
@@ -221,8 +223,21 @@ func TestUnmountHostMountsRemoveBindHostPath(t *testing.T) {
 	hostPath := createFakeMountDir(t, testDir, "host-path")
 	nonEmptyHostpath := createFakeMountDir(t, testDir, "non-empty-host-path")
 	devPath := createFakeMountDir(t, testDir, "dev-hostpath")
+	// create sandbox for mounting into
+	sandbox := &Sandbox{
+		ctx:    context.Background(),
+		id:     "foobar",
+		config: &SandboxConfig{},
+	}
+
+	fsShare, err := NewFilesystemShare(sandbox)
+	if err != nil {
+		t.Fatal(err)
+	}
+	sandbox.fsShare = fsShare
+
 	createFakeMountDir(t, nonEmptyHostpath, "nop")
-	doUnmountCheck(src, dest, hostPath, nonEmptyHostpath, devPath)
+	doUnmountCheck(sandbox, src, dest, hostPath, nonEmptyHostpath, devPath)
 
 	src = createFakeMountFile(t, testDir, "src")
 	dest = createFakeMountFile(t, testDir, "dest")
@@ -235,7 +250,7 @@ func TestUnmountHostMountsRemoveBindHostPath(t *testing.T) {
 	}
 	f.WriteString("nop\n")
 	f.Close()
-	doUnmountCheck(src, dest, hostPath, nonEmptyHostpath, devPath)
+	doUnmountCheck(sandbox, src, dest, hostPath, nonEmptyHostpath, devPath)
 }
 
 func testSetupFakeRootfs(t *testing.T) (testRawFile, loopDev, mntDir string, err error) {
@@ -584,8 +599,14 @@ func TestMountSharedDirMounts(t *testing.T) {
 			},
 		},
 	}
+
+	fsShare, err := NewFilesystemShare(sandbox)
+	assert.Nil(err)
+	sandbox.fsShare = fsShare
+
 	// setup the shared mounts:
-	k.setupSharedPath(k.ctx, sandbox)
+	err = sandbox.fsShare.Prepare(sandbox.ctx)
+	assert.NoError(err)
 
 	//
 	// Create the mounts that we'll test with

src/runtime/virtcontainers/device/config/config.go

@@ -425,8 +425,8 @@ func getVhostUserDevName(dirname string, majorNum, minorNum uint32) (string, err
 			return "", err
 		}
 
-		devMajor := unix.Major(devStat.Rdev)
-		devMinor := unix.Minor(devStat.Rdev)
+		devMajor := unix.Major(uint64(devStat.Rdev))
+		devMinor := unix.Minor(uint64(devStat.Rdev))
 		if devMajor == majorNum && devMinor == minorNum {
 			return file.Name(), nil
 		}

src/runtime/virtcontainers/device/config/pmem.go

@@ -51,8 +51,8 @@ func PmemDeviceInfo(source, destination string) (*DeviceInfo, error) {
 	device := &DeviceInfo{
 		ContainerPath: destination,
 		DevType:       "b",
-		Major:         int64(unix.Major(stat.Dev)),
-		Minor:         int64(unix.Minor(stat.Dev)),
+		Major:         int64(unix.Major(uint64(stat.Dev))),
+		Minor:         int64(unix.Minor(uint64(stat.Dev))),
 		Pmem:          true,
 		DriverOptions: make(map[string]string),
 	}

src/runtime/virtcontainers/device/manager/manager_linux_test.go

@@ -0,0 +1,100 @@
+// Copyright (c) 2017 Intel Corporation
+// Copyright (c) 2018 Huawei Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package manager
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+
+	ktu "github.com/kata-containers/kata-containers/src/runtime/pkg/katatestutils"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/api"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/drivers"
+	"github.com/stretchr/testify/assert"
+
+	"golang.org/x/sys/unix"
+)
+
+func TestAttachVhostUserBlkDevice(t *testing.T) {
+	rootEnabled := true
+	tc := ktu.NewTestConstraint(false)
+	if tc.NotValid(ktu.NeedRoot()) {
+		rootEnabled = false
+	}
+
+	tmpDir, err := os.MkdirTemp("", "")
+	dm := &deviceManager{
+		blockDriver:           VirtioBlock,
+		devices:               make(map[string]api.Device),
+		vhostUserStoreEnabled: true,
+		vhostUserStorePath:    tmpDir,
+	}
+	assert.Nil(t, err)
+	defer os.RemoveAll(tmpDir)
+
+	vhostUserDevNodePath := filepath.Join(tmpDir, "/block/devices/")
+	vhostUserSockPath := filepath.Join(tmpDir, "/block/sockets/")
+	deviceNodePath := filepath.Join(vhostUserDevNodePath, "vhostblk0")
+	deviceSockPath := filepath.Join(vhostUserSockPath, "vhostblk0")
+
+	err = os.MkdirAll(vhostUserDevNodePath, dirMode)
+	assert.Nil(t, err)
+	err = os.MkdirAll(vhostUserSockPath, dirMode)
+	assert.Nil(t, err)
+	_, err = os.Create(deviceSockPath)
+	assert.Nil(t, err)
+
+	// mknod requires root privilege, call mock function for non-root to
+	// get VhostUserBlk device type.
+	if rootEnabled == true {
+		err = unix.Mknod(deviceNodePath, unix.S_IFBLK, int(unix.Mkdev(config.VhostUserBlkMajor, 0)))
+		assert.Nil(t, err)
+	} else {
+		savedFunc := config.GetVhostUserNodeStatFunc
+
+		_, err = os.Create(deviceNodePath)
+		assert.Nil(t, err)
+
+		config.GetVhostUserNodeStatFunc = func(devNodePath string,
+			devNodeStat *unix.Stat_t) error {
+			if deviceNodePath != devNodePath {
+				return fmt.Errorf("mock GetVhostUserNodeStatFunc error")
+			}
+
+			devNodeStat.Rdev = unix.Mkdev(config.VhostUserBlkMajor, 0)
+			return nil
+		}
+
+		defer func() {
+			config.GetVhostUserNodeStatFunc = savedFunc
+		}()
+	}
+
+	path := "/dev/vda"
+	deviceInfo := config.DeviceInfo{
+		HostPath:      deviceNodePath,
+		ContainerPath: path,
+		DevType:       "b",
+		Major:         config.VhostUserBlkMajor,
+		Minor:         0,
+	}
+
+	devReceiver := &api.MockDeviceReceiver{}
+	device, err := dm.NewDevice(deviceInfo)
+	assert.Nil(t, err)
+	_, ok := device.(*drivers.VhostUserBlkDevice)
+	assert.True(t, ok)
+
+	err = device.Attach(context.Background(), devReceiver)
+	assert.Nil(t, err)
+
+	err = device.Detach(context.Background(), devReceiver)
+	assert.Nil(t, err)
+}

src/runtime/virtcontainers/device/manager/manager_test.go

@@ -8,19 +8,15 @@ package manager
 
 import (
 	"context"
-	"fmt"
 	"os"
 	"path/filepath"
 	"strconv"
 	"testing"
 
-	ktu "github.com/kata-containers/kata-containers/src/runtime/pkg/katatestutils"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/drivers"
 	"github.com/stretchr/testify/assert"
-
-	"golang.org/x/sys/unix"
 )
 
 const fileMode0640 = os.FileMode(0640)
@@ -217,83 +213,6 @@ func TestAttachBlockDevice(t *testing.T) {
 	assert.Nil(t, err)
 }
 
-func TestAttachVhostUserBlkDevice(t *testing.T) {
-	rootEnabled := true
-	tc := ktu.NewTestConstraint(false)
-	if tc.NotValid(ktu.NeedRoot()) {
-		rootEnabled = false
-	}
-
-	tmpDir, err := os.MkdirTemp("", "")
-	dm := &deviceManager{
-		blockDriver:           VirtioBlock,
-		devices:               make(map[string]api.Device),
-		vhostUserStoreEnabled: true,
-		vhostUserStorePath:    tmpDir,
-	}
-	assert.Nil(t, err)
-	defer os.RemoveAll(tmpDir)
-
-	vhostUserDevNodePath := filepath.Join(tmpDir, "/block/devices/")
-	vhostUserSockPath := filepath.Join(tmpDir, "/block/sockets/")
-	deviceNodePath := filepath.Join(vhostUserDevNodePath, "vhostblk0")
-	deviceSockPath := filepath.Join(vhostUserSockPath, "vhostblk0")
-
-	err = os.MkdirAll(vhostUserDevNodePath, dirMode)
-	assert.Nil(t, err)
-	err = os.MkdirAll(vhostUserSockPath, dirMode)
-	assert.Nil(t, err)
-	_, err = os.Create(deviceSockPath)
-	assert.Nil(t, err)
-
-	// mknod requires root privilege, call mock function for non-root to
-	// get VhostUserBlk device type.
-	if rootEnabled == true {
-		err = unix.Mknod(deviceNodePath, unix.S_IFBLK, int(unix.Mkdev(config.VhostUserBlkMajor, 0)))
-		assert.Nil(t, err)
-	} else {
-		savedFunc := config.GetVhostUserNodeStatFunc
-
-		_, err = os.Create(deviceNodePath)
-		assert.Nil(t, err)
-
-		config.GetVhostUserNodeStatFunc = func(devNodePath string,
-			devNodeStat *unix.Stat_t) error {
-			if deviceNodePath != devNodePath {
-				return fmt.Errorf("mock GetVhostUserNodeStatFunc error")
-			}
-
-			devNodeStat.Rdev = unix.Mkdev(config.VhostUserBlkMajor, 0)
-			return nil
-		}
-
-		defer func() {
-			config.GetVhostUserNodeStatFunc = savedFunc
-		}()
-	}
-
-	path := "/dev/vda"
-	deviceInfo := config.DeviceInfo{
-		HostPath:      deviceNodePath,
-		ContainerPath: path,
-		DevType:       "b",
-		Major:         config.VhostUserBlkMajor,
-		Minor:         0,
-	}
-
-	devReceiver := &api.MockDeviceReceiver{}
-	device, err := dm.NewDevice(deviceInfo)
-	assert.Nil(t, err)
-	_, ok := device.(*drivers.VhostUserBlkDevice)
-	assert.True(t, ok)
-
-	err = device.Attach(context.Background(), devReceiver)
-	assert.Nil(t, err)
-
-	err = device.Detach(context.Background(), devReceiver)
-	assert.Nil(t, err)
-}
-
 func TestAttachDetachDevice(t *testing.T) {
 	dm := NewDeviceManager(VirtioSCSI, false, "", nil)
 

src/runtime/virtcontainers/factory/factory_test.go

@@ -7,7 +7,6 @@ package factory
 
 import (
 	"context"
-	"fmt"
 	"os"
 	"testing"
 
@@ -61,10 +60,11 @@ func TestNewFactory(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 	vc.MockHybridVSockPath = url
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
-	err = hybridVSockTTRPCMock.Start(fmt.Sprintf("mock://%s", url))
+	err = hybridVSockTTRPCMock.Start(url)
 	assert.NoError(err)
 	defer hybridVSockTTRPCMock.Stop()
 
@@ -179,10 +179,11 @@ func TestFactoryGetVM(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 	vc.MockHybridVSockPath = url
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
-	err = hybridVSockTTRPCMock.Start(fmt.Sprintf("mock://%s", url))
+	err = hybridVSockTTRPCMock.Start(url)
 	assert.NoError(err)
 	defer hybridVSockTTRPCMock.Stop()
 

src/runtime/virtcontainers/factory/template/template_test.go

@@ -51,10 +51,11 @@ func TestTemplateFactory(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 	vc.MockHybridVSockPath = url
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
-	err = hybridVSockTTRPCMock.Start(fmt.Sprintf("mock://%s", url))
+	err = hybridVSockTTRPCMock.Start(url)
 	assert.NoError(err)
 	defer hybridVSockTTRPCMock.Stop()
 

src/runtime/virtcontainers/fc.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -792,10 +795,13 @@ func (fc *firecracker) StartVM(ctx context.Context, timeout int) error {
 	// are executed by kata-runtime after this call, run with the SELinux
 	// label. If these processes require privileged, we do not want to run
 	// them under confinement.
-	if err := label.SetProcessLabel(fc.config.SELinuxProcessLabel); err != nil {
-		return err
+	if !fc.config.DisableSeLinux {
+
+		if err := label.SetProcessLabel(fc.config.SELinuxProcessLabel); err != nil {
+			return err
+		}
+		defer label.SetProcessLabel("")
 	}
-	defer label.SetProcessLabel("")
 
 	err = fc.fcInit(ctx, fcTimeout)
 	if err != nil {

src/runtime/virtcontainers/fc_metrics.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/fc_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/fs_share.go

@@ -0,0 +1,77 @@
+// Copyright (c) 2022 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package virtcontainers
+
+import (
+	"context"
+
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/agent/protocols/grpc"
+)
+
+// fsShareTracingTags defines tags for the trace span
+var fsShareTracingTags = map[string]string{
+	"source":    "runtime",
+	"package":   "virtcontainers",
+	"subsystem": "fs_share",
+}
+
+// SharedFile represents the outcome of a host filesystem sharing
+// operation.
+type SharedFile struct {
+	storage   *grpc.Storage
+	guestPath string
+}
+
+type FilesystemSharer interface {
+	// Prepare will set the host filesystem up, making it ready
+	// to share container files and directories with the guest.
+	// It will be called before any container is running.
+	//
+	// For example, the Linux implementation would create and
+	// prepare the host shared folders, and also make all
+	// sandbox mounts ready to be shared.
+	//
+	// Implementation of this method must be idempotent and be
+	// ready to potentially be called several times in a row,
+	// without symmetric calls to Cleanup in between.
+	Prepare(context.Context) error
+
+	// Cleanup cleans the host filesystem up from the initial
+	// setup created by Prepare.
+	// It will be called after all containers are terminated.
+	//
+	// Implementation of this method must be idempotent and be
+	// ready to potentially be called several times in a row,
+	// without symmetric calls to Prepare in between.
+	Cleanup(context.Context) error
+
+	// ShareFile shares a file (a regular file or a directory)
+	// from the host filesystem with a container running in the
+	// guest. The host file to be shared is described by the
+	// Mount argument.
+	// This method should be called for each container file to
+	// be shared with the guest.
+	//
+	// The returned SharedFile pointer describes how the file
+	// should be shared between the host and the guest. If it
+	// is nil, then the shared filed described by the Mount
+	// argument will be ignored by the guest, i.e. it will NOT
+	// be shared with the guest.
+	ShareFile(context.Context, *Container, *Mount) (*SharedFile, error)
+
+	// UnshareFile stops sharing a container file, described by
+	// the Mount argument.
+	UnshareFile(context.Context, *Container, *Mount) error
+
+	// ShareRootFilesystem shares a container bundle rootfs with
+	// the Kata guest, allowing the kata agent to eventually start
+	// the container from that shared rootfs.
+	ShareRootFilesystem(context.Context, *Container) (*SharedFile, error)
+
+	// UnshareRootFilesystem stops sharing a container bundle
+	// rootfs.
+	UnshareRootFilesystem(context.Context, *Container) error
+}

src/runtime/virtcontainers/fs_share_linux.go

@@ -0,0 +1,479 @@
+// Copyright (c) 2016 Intel Corporation
+// Copyright (c) 2014,2015,2016,2017 Docker, Inc.
+// Copyright (c) 2022 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package virtcontainers
+
+import (
+	"context"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+	"syscall"
+
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils/katatrace"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/agent/protocols/grpc"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/utils"
+)
+
+func unmountNoFollow(path string) error {
+	return syscall.Unmount(path, syscall.MNT_DETACH|UmountNoFollow)
+}
+
+type FilesystemShare struct {
+	sandbox *Sandbox
+	sync.Mutex
+	prepared bool
+}
+
+func NewFilesystemShare(s *Sandbox) (FilesystemSharer, error) {
+	return &FilesystemShare{
+		prepared: false,
+		sandbox:  s,
+	}, nil
+}
+
+// Logger returns a logrus logger appropriate for logging Filesystem sharing messages
+func (f *FilesystemShare) Logger() *logrus.Entry {
+	return virtLog.WithFields(logrus.Fields{
+		"subsystem": "filesystem share",
+		"sandbox":   f.sandbox.ID(),
+	})
+}
+
+func (f *FilesystemShare) prepareBindMounts(ctx context.Context) error {
+	span, ctx := katatrace.Trace(ctx, f.Logger(), "setupBindMounts", fsShareTracingTags)
+	defer span.End()
+
+	var err error
+
+	if len(f.sandbox.config.SandboxBindMounts) == 0 {
+		return nil
+	}
+
+	// Create subdirectory in host shared path for sandbox mounts
+	sandboxMountDir := filepath.Join(getMountPath(f.sandbox.ID()), sandboxMountsDir)
+	sandboxShareDir := filepath.Join(GetSharePath(f.sandbox.ID()), sandboxMountsDir)
+	if err := os.MkdirAll(sandboxMountDir, DirMode); err != nil {
+		return fmt.Errorf("Creating sandbox shared mount directory: %v: %w", sandboxMountDir, err)
+	}
+	var mountedList []string
+	defer func() {
+		if err != nil {
+			for _, mnt := range mountedList {
+				if derr := unmountNoFollow(mnt); derr != nil {
+					f.Logger().WithError(derr).Errorf("Cleanup: couldn't unmount %s", mnt)
+				}
+			}
+			if derr := os.RemoveAll(sandboxMountDir); derr != nil {
+				f.Logger().WithError(derr).Errorf("Cleanup: failed to remove %s", sandboxMountDir)
+			}
+
+		}
+	}()
+
+	for _, m := range f.sandbox.config.SandboxBindMounts {
+		mountDest := filepath.Join(sandboxMountDir, filepath.Base(m))
+		// bind-mount each sandbox mount that's defined into the sandbox mounts dir
+		if err := bindMount(ctx, m, mountDest, true, "private"); err != nil {
+			return fmt.Errorf("Mounting sandbox directory: %v to %v: %w", m, mountDest, err)
+		}
+		mountedList = append(mountedList, mountDest)
+
+		mountDest = filepath.Join(sandboxShareDir, filepath.Base(m))
+		if err := remountRo(ctx, mountDest); err != nil {
+			return fmt.Errorf("remount sandbox directory: %v to %v: %w", m, mountDest, err)
+		}
+	}
+
+	return nil
+}
+
+func (f *FilesystemShare) cleanupBindMounts(ctx context.Context) error {
+	if f.sandbox.config == nil || len(f.sandbox.config.SandboxBindMounts) == 0 {
+		return nil
+	}
+
+	var retErr error
+	bindmountShareDir := filepath.Join(getMountPath(f.sandbox.ID()), sandboxMountsDir)
+	for _, m := range f.sandbox.config.SandboxBindMounts {
+		mountPath := filepath.Join(bindmountShareDir, filepath.Base(m))
+		if err := unmountNoFollow(mountPath); err != nil {
+			if retErr == nil {
+				retErr = err
+			}
+			f.Logger().WithError(err).Errorf("Failed to unmount sandbox bindmount: %v", mountPath)
+		}
+	}
+	if err := os.RemoveAll(bindmountShareDir); err != nil {
+		if retErr == nil {
+			retErr = err
+		}
+		f.Logger().WithError(err).Errorf("Failed to remove sandbox bindmount directory: %s", bindmountShareDir)
+	}
+
+	return retErr
+}
+
+func (f *FilesystemShare) Prepare(ctx context.Context) error {
+	var err error
+
+	span, ctx := katatrace.Trace(ctx, f.Logger(), "prepare", fsShareTracingTags)
+	defer span.End()
+
+	f.Lock()
+	defer f.Unlock()
+
+	// Prepare is idempotent, i.e. can be called multiple times in a row, without failing
+	// and without modifying the filesystem state after the first call.
+	if f.prepared {
+		f.Logger().Warn("Calling Prepare() on an already prepared filesystem")
+		return nil
+	}
+
+	// Toggle prepared to true if everything went fine.
+	defer func() {
+		if err == nil {
+			f.prepared = true
+		}
+	}()
+
+	// create shared path structure
+	sharePath := GetSharePath(f.sandbox.ID())
+	mountPath := getMountPath(f.sandbox.ID())
+	if err = os.MkdirAll(sharePath, sharedDirMode); err != nil {
+		return err
+	}
+	if err = os.MkdirAll(mountPath, DirMode); err != nil {
+		return err
+	}
+
+	// slave mount so that future mountpoints under mountPath are shown in sharePath as well
+	if err = bindMount(ctx, mountPath, sharePath, true, "slave"); err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			if umountErr := unmountNoFollow(sharePath); umountErr != nil {
+				f.Logger().WithError(umountErr).Errorf("failed to unmount vm share path %s", sharePath)
+			}
+		}
+	}()
+
+	// Setup sandbox bindmounts, if specified.
+	if err = f.prepareBindMounts(ctx); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (f *FilesystemShare) Cleanup(ctx context.Context) error {
+	var err error
+
+	f.Lock()
+	defer f.Unlock()
+
+	// Cleanup is idempotent, i.e. can be called multiple times in a row, without failing
+	// and without modifying the filesystem state after the first call.
+	if !f.prepared {
+		f.Logger().Warn("Calling Cleanup() on an already cleaned up filesystem")
+		return nil
+	}
+
+	// Toggle prepared to false if everything went fine.
+	defer func() {
+		if err == nil {
+			f.prepared = false
+		}
+	}()
+
+	// Unmount all the sandbox bind mounts.
+	if err = f.cleanupBindMounts(ctx); err != nil {
+		return err
+	}
+
+	// Unmount shared path
+	path := GetSharePath(f.sandbox.ID())
+	f.Logger().WithField("path", path).Infof("Cleanup agent")
+	if err = unmountNoFollow(path); err != nil {
+		f.Logger().WithError(err).Errorf("failed to unmount vm share path %s", path)
+		return err
+	}
+
+	// Unmount mount path
+	path = getMountPath(f.sandbox.ID())
+	if err = bindUnmountAllRootfs(ctx, path, f.sandbox); err != nil {
+		f.Logger().WithError(err).Errorf("failed to unmount vm mount path %s", path)
+		return err
+	}
+	if err = os.RemoveAll(getSandboxPath(f.sandbox.ID())); err != nil {
+		f.Logger().WithError(err).Errorf("failed to Cleanup vm path %s", getSandboxPath(f.sandbox.ID()))
+		return err
+	}
+
+	return nil
+}
+
+func (f *FilesystemShare) ShareFile(ctx context.Context, c *Container, m *Mount) (*SharedFile, error) {
+	randBytes, err := utils.GenerateRandomBytes(8)
+	if err != nil {
+		return nil, err
+	}
+
+	filename := fmt.Sprintf("%s-%s-%s", c.id, hex.EncodeToString(randBytes), filepath.Base(m.Destination))
+	guestPath := filepath.Join(kataGuestSharedDir(), filename)
+
+	// copy file to container's rootfs if filesystem sharing is not supported, otherwise
+	// bind mount it in the shared directory.
+	caps := f.sandbox.hypervisor.Capabilities(ctx)
+	if !caps.IsFsSharingSupported() {
+		f.Logger().Debug("filesystem sharing is not supported, files will be copied")
+
+		fileInfo, err := os.Stat(m.Source)
+		if err != nil {
+			return nil, err
+		}
+
+		// Ignore the mount if this is not a regular file (excludes
+		// directory, socket, device, ...) as it cannot be handled by
+		// a simple copy. But this should not be treated as an error,
+		// only as a limitation.
+		if !fileInfo.Mode().IsRegular() {
+			f.Logger().WithField("ignored-file", m.Source).Debug("Ignoring non-regular file as FS sharing not supported")
+			return nil, nil
+		}
+
+		if err := f.sandbox.agent.copyFile(ctx, m.Source, guestPath); err != nil {
+			return nil, err
+		}
+	} else {
+		// These mounts are created in the shared dir
+		mountDest := filepath.Join(getMountPath(f.sandbox.ID()), filename)
+		if !m.ReadOnly {
+			if err := bindMount(ctx, m.Source, mountDest, false, "private"); err != nil {
+				return nil, err
+			}
+		} else {
+			// For RO mounts, bindmount remount event is not propagated to mount subtrees,
+			// and it doesn't present in the virtiofsd standalone mount namespace either.
+			// So we end up a bit tricky:
+			// 1. make a private ro bind mount to the mount source
+			// 2. duplicate the ro mount we create in step 1 to mountDest, by making a bind mount. No need to remount with MS_RDONLY here.
+			// 3. umount the private bind mount created in step 1
+			privateDest := filepath.Join(getPrivatePath(f.sandbox.ID()), filename)
+
+			if err := bindMount(ctx, m.Source, privateDest, true, "private"); err != nil {
+				return nil, err
+			}
+			defer func() {
+				unmountNoFollow(privateDest)
+			}()
+
+			if err := bindMount(ctx, privateDest, mountDest, false, "private"); err != nil {
+				return nil, err
+			}
+		}
+
+		// Save HostPath mount value into the passed mount
+		m.HostPath = mountDest
+	}
+
+	return &SharedFile{
+		guestPath: guestPath,
+	}, nil
+}
+
+func (f *FilesystemShare) UnshareFile(ctx context.Context, c *Container, m *Mount) error {
+	if err := unmountNoFollow(m.HostPath); err != nil {
+		return err
+	}
+
+	if m.Type == "bind" {
+		s, err := os.Stat(m.HostPath)
+		if err != nil {
+			return errors.Wrapf(err, "Could not stat host-path %v", m.HostPath)
+		}
+		// Remove the empty file or directory
+		if s.Mode().IsRegular() && s.Size() == 0 {
+			os.Remove(m.HostPath)
+		}
+		if s.Mode().IsDir() {
+			syscall.Rmdir(m.HostPath)
+		}
+	}
+
+	return nil
+}
+
+func (f *FilesystemShare) shareRootFilesystemWithNydus(ctx context.Context, c *Container) (*SharedFile, error) {
+	rootfsGuestPath := filepath.Join(kataGuestSharedDir(), c.id, c.rootfsSuffix)
+	virtiofsDaemon, err := getVirtiofsDaemonForNydus(f.sandbox)
+	if err != nil {
+		return nil, err
+	}
+	extraOption, err := parseExtraOption(c.rootFs.Options)
+	if err != nil {
+		return nil, err
+	}
+	f.Logger().Infof("Nydus option: %v", extraOption)
+	mountOpt := &MountOption{
+		mountpoint: rafsMountPath(c.id),
+		source:     extraOption.Source,
+		config:     extraOption.Config,
+	}
+
+	// mount lowerdir to guest /run/kata-containers/shared/images/<cid>/lowerdir
+	if err := virtiofsDaemon.Mount(*mountOpt); err != nil {
+		return nil, err
+	}
+	rootfs := &grpc.Storage{}
+	containerShareDir := filepath.Join(getMountPath(f.sandbox.ID()), c.id)
+
+	// mkdir rootfs, guest at /run/kata-containers/shared/containers/<cid>/rootfs
+	rootfsDir := filepath.Join(containerShareDir, c.rootfsSuffix)
+	if err := os.MkdirAll(rootfsDir, DirMode); err != nil {
+		return nil, err
+	}
+
+	// bindmount snapshot dir which snapshotter allocated
+	// to guest /run/kata-containers/shared/containers/<cid>/snapshotdir
+	snapshotShareDir := filepath.Join(containerShareDir, snapshotDir)
+	if err := bindMount(ctx, extraOption.Snapshotdir, snapshotShareDir, true, "slave"); err != nil {
+		return nil, err
+	}
+
+	// so rootfs = overlay(upperdir, workerdir, lowerdir)
+	rootfs.MountPoint = rootfsGuestPath
+	rootfs.Source = typeOverlayFS
+	rootfs.Fstype = typeOverlayFS
+	rootfs.Driver = kataOverlayDevType
+	rootfs.Options = append(rootfs.Options, fmt.Sprintf("%s=%s", upperDir, filepath.Join(kataGuestSharedDir(), c.id, snapshotDir, "fs")))
+	rootfs.Options = append(rootfs.Options, fmt.Sprintf("%s=%s", workDir, filepath.Join(kataGuestSharedDir(), c.id, snapshotDir, "work")))
+	rootfs.Options = append(rootfs.Options, fmt.Sprintf("%s=%s", lowerDir, filepath.Join(kataGuestNydusImageDir(), c.id, lowerDir)))
+	rootfs.Options = append(rootfs.Options, "index=off")
+	f.Logger().Infof("Nydus rootfs info: %#v\n", rootfs)
+
+	return &SharedFile{
+		storage:   rootfs,
+		guestPath: rootfsGuestPath,
+	}, nil
+}
+
+//func (c *Container) shareRootfs(ctx context.Context) (*grpc.Storage, string, error) {
+func (f *FilesystemShare) ShareRootFilesystem(ctx context.Context, c *Container) (*SharedFile, error) {
+	// In the confidential computing, there is no Image information on the host,
+	// so there is no Rootfs.Target.
+	if f.sandbox.config.ServiceOffload && c.rootFs.Target == "" {
+		return nil, nil
+	}
+	if c.rootFs.Type == NydusRootFSType {
+		return f.shareRootFilesystemWithNydus(ctx, c)
+	}
+	rootfsGuestPath := filepath.Join(kataGuestSharedDir(), c.id, c.rootfsSuffix)
+
+	if c.state.Fstype != "" && c.state.BlockDeviceID != "" {
+		// The rootfs storage volume represents the container rootfs
+		// mount point inside the guest.
+		// It can be a block based device (when using block based container
+		// overlay on the host) mount or a 9pfs one (for all other overlay
+		// implementations).
+		rootfsStorage := &grpc.Storage{}
+
+		// This is a block based device rootfs.
+		device := f.sandbox.devManager.GetDeviceByID(c.state.BlockDeviceID)
+		if device == nil {
+			f.Logger().WithField("device", c.state.BlockDeviceID).Error("failed to find device by id")
+			return nil, fmt.Errorf("failed to find device by id %q", c.state.BlockDeviceID)
+		}
+
+		blockDrive, ok := device.GetDeviceInfo().(*config.BlockDrive)
+		if !ok || blockDrive == nil {
+			f.Logger().Error("malformed block drive")
+			return nil, fmt.Errorf("malformed block drive")
+		}
+		switch {
+		case f.sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioMmio:
+			rootfsStorage.Driver = kataMmioBlkDevType
+			rootfsStorage.Source = blockDrive.VirtPath
+		case f.sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioBlockCCW:
+			rootfsStorage.Driver = kataBlkCCWDevType
+			rootfsStorage.Source = blockDrive.DevNo
+		case f.sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioBlock:
+			rootfsStorage.Driver = kataBlkDevType
+			rootfsStorage.Source = blockDrive.PCIPath.String()
+		case f.sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioSCSI:
+			rootfsStorage.Driver = kataSCSIDevType
+			rootfsStorage.Source = blockDrive.SCSIAddr
+		default:
+			return nil, fmt.Errorf("Unknown block device driver: %s", f.sandbox.config.HypervisorConfig.BlockDeviceDriver)
+		}
+
+		// We can't use filepath.Dir(rootfsGuestPath) (The rootfs parent) because
+		// with block devices the rootfsSuffix may not be set.
+		// So we have to build the bundle path explicitly.
+		rootfsStorage.MountPoint = filepath.Join(kataGuestSharedDir(), c.id)
+		rootfsStorage.Fstype = c.state.Fstype
+
+		if c.state.Fstype == "xfs" {
+			rootfsStorage.Options = []string{"nouuid"}
+		}
+
+		// Ensure container mount destination exists
+		// TODO: remove dependency on shared fs path. shared fs is just one kind of storage source.
+		// we should not always use shared fs path for all kinds of storage. Instead, all storage
+		// should be bind mounted to a tmpfs path for containers to use.
+		if err := os.MkdirAll(filepath.Join(getMountPath(f.sandbox.ID()), c.id, c.rootfsSuffix), DirMode); err != nil {
+			return nil, err
+		}
+
+		return &SharedFile{
+			storage:   rootfsStorage,
+			guestPath: rootfsGuestPath,
+		}, nil
+	}
+
+	// This is not a block based device rootfs. We are going to bind mount it into the shared drive
+	// between the host and the guest.
+	// With virtiofs/9pfs we don't need to ask the agent to mount the rootfs as the shared directory
+	// (kataGuestSharedDir) is already mounted in the guest. We only need to mount the rootfs from
+	// the host and it will show up in the guest.
+	if err := bindMountContainerRootfs(ctx, getMountPath(f.sandbox.ID()), c.id, c.rootFs.Target, false); err != nil {
+		return nil, err
+	}
+
+	return &SharedFile{
+		storage:   nil,
+		guestPath: rootfsGuestPath,
+	}, nil
+}
+
+func (f *FilesystemShare) UnshareRootFilesystem(ctx context.Context, c *Container) error {
+	if c.rootFs.Type == NydusRootFSType {
+		if err2 := nydusContainerCleanup(ctx, getMountPath(c.sandbox.id), c); err2 != nil {
+			f.Logger().WithError(err2).Error("rollback failed nydusContainerCleanup")
+		}
+	} else {
+		if err := bindUnmountContainerRootfs(ctx, getMountPath(f.sandbox.ID()), c.id); err != nil {
+			return err
+		}
+	}
+
+	// Remove the shared directory for this container.
+	shareDir := filepath.Join(getMountPath(f.sandbox.ID()), c.id)
+	if err := syscall.Rmdir(shareDir); err != nil {
+		f.Logger().WithError(err).WithField("share-dir", shareDir).Warn("Could not remove container share dir")
+	}
+
+	return nil
+
+}

src/runtime/virtcontainers/fs_share_linux_test.go

@@ -0,0 +1,102 @@
+// Copyright (c) 2018 Intel Corporation
+// Copyright (c) 2022 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package virtcontainers
+
+import (
+	"context"
+	"os"
+	"path"
+	"path/filepath"
+	"syscall"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSandboxSharedFilesystem(t *testing.T) {
+	if os.Getuid() != 0 {
+		t.Skip("Test disabled as requires root user")
+	}
+
+	assert := assert.New(t)
+	// create temporary files to mount:
+	testMountPath, err := os.MkdirTemp("", "sandbox-test")
+	assert.NoError(err)
+	defer os.RemoveAll(testMountPath)
+
+	// create a new shared directory for our test:
+	kataHostSharedDirSaved := kataHostSharedDir
+	testHostDir, err := os.MkdirTemp("", "kata-Cleanup")
+	assert.NoError(err)
+	kataHostSharedDir = func() string {
+		return testHostDir
+	}
+	defer func() {
+		kataHostSharedDir = kataHostSharedDirSaved
+	}()
+
+	m1Path := filepath.Join(testMountPath, "foo.txt")
+	f1, err := os.Create(m1Path)
+	assert.NoError(err)
+	defer f1.Close()
+
+	m2Path := filepath.Join(testMountPath, "bar.txt")
+	f2, err := os.Create(m2Path)
+	assert.NoError(err)
+	defer f2.Close()
+
+	// create sandbox for mounting into
+	sandbox := &Sandbox{
+		ctx: context.Background(),
+		id:  "foobar",
+		config: &SandboxConfig{
+			SandboxBindMounts: []string{m1Path, m2Path},
+		},
+	}
+
+	fsShare, err := NewFilesystemShare(sandbox)
+	assert.Nil(err)
+	sandbox.fsShare = fsShare
+
+	// make the shared directory for our test:
+	dir := kataHostSharedDir()
+	err = os.MkdirAll(path.Join(dir, sandbox.id), 0777)
+	assert.Nil(err)
+	defer os.RemoveAll(dir)
+
+	// Test the prepare function. We expect it to succeed
+	err = sandbox.fsShare.Prepare(sandbox.ctx)
+	assert.NoError(err)
+
+	// Test the Cleanup function. We expect it to succeed for the mount to be removed.
+	err = sandbox.fsShare.Cleanup(sandbox.ctx)
+	assert.NoError(err)
+
+	// After successful Cleanup, verify there are not any mounts left behind.
+	stat := syscall.Stat_t{}
+	mount1CheckPath := filepath.Join(getMountPath(sandbox.id), sandboxMountsDir, filepath.Base(m1Path))
+	err = syscall.Stat(mount1CheckPath, &stat)
+	assert.Error(err)
+	assert.True(os.IsNotExist(err))
+
+	mount2CheckPath := filepath.Join(getMountPath(sandbox.id), sandboxMountsDir, filepath.Base(m2Path))
+	err = syscall.Stat(mount2CheckPath, &stat)
+	assert.Error(err)
+	assert.True(os.IsNotExist(err))
+
+	// Verify that Prepare is idempotent.
+	err = sandbox.fsShare.Prepare(sandbox.ctx)
+	assert.NoError(err)
+	err = sandbox.fsShare.Prepare(sandbox.ctx)
+	assert.NoError(err)
+
+	// Verify that Cleanup is idempotent.
+	err = sandbox.fsShare.Cleanup(sandbox.ctx)
+	assert.NoError(err)
+	err = sandbox.fsShare.Cleanup(sandbox.ctx)
+	assert.NoError(err)
+}

src/runtime/virtcontainers/hypervisor.go

@@ -14,10 +14,12 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pkg/errors"
+
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	hv "github.com/kata-containers/kata-containers/src/runtime/pkg/hypervisors"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
-	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/utils"
 
 	"github.com/sirupsen/logrus"
 )
@@ -69,14 +71,17 @@ const (
 
 	// MinHypervisorMemory is the minimum memory required for a VM.
 	MinHypervisorMemory = 256
+
+	defaultMsize9p = 8192
 )
 
 var (
-	hvLogger = logrus.WithField("source", "virtcontainers/hypervisor")
+	hvLogger                   = logrus.WithField("source", "virtcontainers/hypervisor")
+	noGuestMemHotplugErr error = errors.New("guest memory hotplug not supported")
 )
 
 // In some architectures the maximum number of vCPUs depends on the number of physical cores.
-var defaultMaxQemuVCPUs = MaxQemuVCPUs()
+var defaultMaxVCPUs = govmm.MaxVCPUs()
 
 // agnostic list of kernel root parameters for NVDIMM
 var commonNvdimmKernelRootParams = []Param{ //nolint: unused, deadcode, varcheck
@@ -192,25 +197,6 @@ func (hType *HypervisorType) String() string {
 	}
 }
 
-// NewHypervisor returns an hypervisor from a hypervisor type.
-func NewHypervisor(hType HypervisorType) (Hypervisor, error) {
-
-	switch hType {
-	case QemuHypervisor:
-		return &qemu{}, nil
-	case FirecrackerHypervisor:
-		return &firecracker{}, nil
-	case AcrnHypervisor:
-		return &Acrn{}, nil
-	case ClhHypervisor:
-		return &cloudHypervisor{}, nil
-	case MockHypervisor:
-		return &mockHypervisor{}, nil
-	default:
-		return nil, fmt.Errorf("Unknown hypervisor type %s", hType)
-	}
-}
-
 // GetHypervisorSocketTemplate returns the full "template" path to the
 // hypervisor socket. If the specified hypervisor doesn't use a socket,
 // an empty string is returned.
@@ -512,6 +498,9 @@ type HypervisorConfig struct {
 
 	// Disable seccomp from the hypervisor process
 	DisableSeccomp bool
+
+	// Disable selinux from the hypervisor process
+	DisableSeLinux bool
 }
 
 // vcpu mapping from vcpu number to thread number
@@ -574,8 +563,13 @@ func (conf *HypervisorConfig) Valid() error {
 		conf.BlockDeviceDriver = config.VirtioBlockCCW
 	}
 
-	if conf.DefaultMaxVCPUs == 0 || conf.DefaultMaxVCPUs > defaultMaxQemuVCPUs {
-		conf.DefaultMaxVCPUs = defaultMaxQemuVCPUs
+	if conf.DefaultMaxVCPUs == 0 || conf.DefaultMaxVCPUs > defaultMaxVCPUs {
+		conf.DefaultMaxVCPUs = defaultMaxVCPUs
+	}
+
+	if conf.ConfidentialGuest && conf.NumVCPUs != conf.DefaultMaxVCPUs {
+		hvLogger.Warnf("Confidential guests do not support hotplugging of vCPUs. Setting DefaultMaxVCPUs to NumVCPUs (%d)", conf.NumVCPUs)
+		conf.DefaultMaxVCPUs = conf.NumVCPUs
 	}
 
 	if conf.Msize9p == 0 && conf.SharedFS != config.VirtioFS {
@@ -894,17 +888,55 @@ func GetHypervisorPid(h Hypervisor) int {
 	return pids[0]
 }
 
-func generateVMSocket(id string, vmStogarePath string) (interface{}, error) {
-	vhostFd, contextID, err := utils.FindContextID()
-	if err != nil {
-		return nil, err
-	}
+// Kind of guest protection
+type guestProtection uint8
 
-	return types.VSock{
-		VhostFd:   vhostFd,
-		ContextID: contextID,
-		Port:      uint32(vSockPort),
-	}, nil
+const (
+	noneProtection guestProtection = iota
+
+	//Intel Trust Domain Extensions
+	//https://software.intel.com/content/www/us/en/develop/articles/intel-trust-domain-extensions.html
+	// Exclude from lint checking for it won't be used on arm64 code
+	tdxProtection
+
+	// AMD Secure Encrypted Virtualization
+	// https://developer.amd.com/sev/
+	// Exclude from lint checking for it won't be used on arm64 code
+	sevProtection
+
+	// IBM POWER 9 Protected Execution Facility
+	// https://www.kernel.org/doc/html/latest/powerpc/ultravisor.html
+	// Exclude from lint checking for it won't be used on arm64 code
+	pefProtection
+
+	// IBM Secure Execution (IBM Z & LinuxONE)
+	// https://www.kernel.org/doc/html/latest/virt/kvm/s390-pv.html
+	// Exclude from lint checking for it won't be used on arm64 code
+	seProtection
+)
+
+var guestProtectionStr = [...]string{
+	noneProtection: "none",
+	pefProtection:  "pef",
+	seProtection:   "se",
+	sevProtection:  "sev",
+	tdxProtection:  "tdx",
+}
+
+func (gp guestProtection) String() string {
+	return guestProtectionStr[gp]
+}
+
+func genericAvailableGuestProtections() (protections []string) {
+	return
+}
+
+func AvailableGuestProtections() (protections []string) {
+	gp, err := availableGuestProtection()
+	if err != nil || gp == noneProtection {
+		return genericAvailableGuestProtections()
+	}
+	return []string{gp.String()}
 }
 
 // hypervisor is the virtcontainers hypervisor interface.

src/runtime/virtcontainers/hypervisor_linux.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2021 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package virtcontainers
+
+import (
+	"fmt"
+
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/utils"
+)
+
+func generateVMSocket(id string, vmStogarePath string) (interface{}, error) {
+	vhostFd, contextID, err := utils.FindContextID()
+	if err != nil {
+		return nil, err
+	}
+
+	return types.VSock{
+		VhostFd:   vhostFd,
+		ContextID: contextID,
+		Port:      uint32(vSockPort),
+	}, nil
+}
+
+// NewHypervisor returns an hypervisor from a hypervisor type.
+func NewHypervisor(hType HypervisorType) (Hypervisor, error) {
+
+	switch hType {
+	case QemuHypervisor:
+		return &qemu{}, nil
+	case FirecrackerHypervisor:
+		return &firecracker{}, nil
+	case AcrnHypervisor:
+		return &Acrn{}, nil
+	case ClhHypervisor:
+		return &cloudHypervisor{}, nil
+	case MockHypervisor:
+		return &mockHypervisor{}, nil
+	default:
+		return nil, fmt.Errorf("Unknown hypervisor type %s", hType)
+	}
+}

src/runtime/virtcontainers/hypervisor_linux_amd64.go

@@ -7,6 +7,14 @@ package virtcontainers
 
 import "os"
 
+const (
+	tdxSysFirmwareDir = "/sys/firmware/tdx_seam/"
+
+	tdxCPUFlag = "tdx"
+
+	sevKvmParameterPath = "/sys/module/kvm_amd/parameters/sev"
+)
+
 // Implementation of this function is architecture specific
 func availableGuestProtection() (guestProtection, error) {
 	flags, err := CPUFlags(procCPUInfo)

src/runtime/virtcontainers/hypervisor_linux_arm64.go

@@ -4,7 +4,7 @@
 
 package virtcontainers
 
-//Returns pefProtection if the firmware directory exists
+// Guest protection is not supported on ARM64.
 func availableGuestProtection() (guestProtection, error) {
 	return noneProtection, nil
 }

src/runtime/virtcontainers/hypervisor_test.go

@@ -185,7 +185,7 @@ func TestHypervisorConfigDefaults(t *testing.T) {
 		MemorySize:        defaultMemSzMiB,
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
-		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		DefaultMaxVCPUs:   defaultMaxVCPUs,
 		Msize9p:           defaultMsize9p,
 	}
 

src/runtime/virtcontainers/ipvlan_endpoint.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/ipvlan_endpoint_test.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/kata_agent.go

@@ -19,6 +19,7 @@ import (
 
 	"github.com/docker/go-units"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils/katatrace"
+	resCtrl "github.com/kata-containers/kata-containers/src/runtime/pkg/resourcecontrol"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/uuid"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
@@ -28,7 +29,6 @@ import (
 	kataclient "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/agent/protocols/client"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/agent/protocols/grpc"
 	vcAnnotations "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/annotations"
-	vccgroups "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/cgroups"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/rootless"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
 	vcTypes "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
@@ -64,16 +64,12 @@ const (
 	// path to vfio devices
 	vfioPath = "/dev/vfio/"
 
-	sandboxMountsDir = "sandbox-mounts"
-
 	NydusRootFSType = "fuse.nydus-overlayfs"
+
 	// enable debug console
 	kernelParamDebugConsole           = "agent.debug_console"
 	kernelParamDebugConsoleVPort      = "agent.debug_console_vport"
 	kernelParamDebugConsoleVPortValue = "1026"
-
-	// Restricted permission for shared directory managed by virtiofs
-	sharedDirMode = os.FileMode(0700) | os.ModeDir
 )
 
 var (
@@ -389,79 +385,6 @@ func (k *kataAgent) internalConfigure(ctx context.Context, h Hypervisor, id stri
 	return nil
 }
 
-func (k *kataAgent) setupSandboxBindMounts(ctx context.Context, sandbox *Sandbox) (err error) {
-	span, ctx := katatrace.Trace(ctx, k.Logger(), "setupSandboxBindMounts", kataAgentTracingTags)
-	defer span.End()
-
-	if len(sandbox.config.SandboxBindMounts) == 0 {
-		return nil
-	}
-
-	// Create subdirectory in host shared path for sandbox mounts
-	sandboxMountDir := filepath.Join(getMountPath(sandbox.id), sandboxMountsDir)
-	sandboxShareDir := filepath.Join(GetSharePath(sandbox.id), sandboxMountsDir)
-	if err := os.MkdirAll(sandboxMountDir, DirMode); err != nil {
-		return fmt.Errorf("Creating sandbox shared mount directory: %v: %w", sandboxMountDir, err)
-	}
-	var mountedList []string
-	defer func() {
-		if err != nil {
-			for _, mnt := range mountedList {
-				if derr := syscall.Unmount(mnt, syscall.MNT_DETACH|UmountNoFollow); derr != nil {
-					k.Logger().WithError(derr).Errorf("Cleanup: couldn't unmount %s", mnt)
-				}
-			}
-			if derr := os.RemoveAll(sandboxMountDir); derr != nil {
-				k.Logger().WithError(derr).Errorf("Cleanup: failed to remove %s", sandboxMountDir)
-			}
-
-		}
-	}()
-
-	for _, m := range sandbox.config.SandboxBindMounts {
-		mountDest := filepath.Join(sandboxMountDir, filepath.Base(m))
-		// bind-mount each sandbox mount that's defined into the sandbox mounts dir
-		if err := bindMount(ctx, m, mountDest, true, "private"); err != nil {
-			return fmt.Errorf("Mounting sandbox directory: %v to %v: %w", m, mountDest, err)
-		}
-		mountedList = append(mountedList, mountDest)
-
-		mountDest = filepath.Join(sandboxShareDir, filepath.Base(m))
-		if err := remountRo(ctx, mountDest); err != nil {
-			return fmt.Errorf("remount sandbox directory: %v to %v: %w", m, mountDest, err)
-		}
-
-	}
-
-	return nil
-}
-
-func (k *kataAgent) cleanupSandboxBindMounts(sandbox *Sandbox) error {
-	if sandbox.config == nil || len(sandbox.config.SandboxBindMounts) == 0 {
-		return nil
-	}
-
-	var retErr error
-	bindmountShareDir := filepath.Join(getMountPath(sandbox.id), sandboxMountsDir)
-	for _, m := range sandbox.config.SandboxBindMounts {
-		mountPath := filepath.Join(bindmountShareDir, filepath.Base(m))
-		if err := syscall.Unmount(mountPath, syscall.MNT_DETACH|UmountNoFollow); err != nil {
-			if retErr == nil {
-				retErr = err
-			}
-			k.Logger().WithError(err).Errorf("Failed to unmount sandbox bindmount: %v", mountPath)
-		}
-	}
-	if err := os.RemoveAll(bindmountShareDir); err != nil {
-		if retErr == nil {
-			retErr = err
-		}
-		k.Logger().WithError(err).Errorf("Failed to remove sandbox bindmount directory: %s", bindmountShareDir)
-	}
-
-	return retErr
-}
-
 func (k *kataAgent) configure(ctx context.Context, h Hypervisor, id, sharePath string, config KataAgentConfig) error {
 	span, ctx := katatrace.Trace(ctx, k.Logger(), "configure", kataAgentTracingTags)
 	defer span.End()
@@ -511,47 +434,10 @@ func (k *kataAgent) configureFromGrpc(ctx context.Context, h Hypervisor, id stri
 	return k.internalConfigure(ctx, h, id, config)
 }
 
-func (k *kataAgent) setupSharedPath(ctx context.Context, sandbox *Sandbox) (err error) {
-	span, ctx := katatrace.Trace(ctx, k.Logger(), "setupSharedPath", kataAgentTracingTags)
-	defer span.End()
-
-	// create shared path structure
-	sharePath := GetSharePath(sandbox.id)
-	mountPath := getMountPath(sandbox.id)
-	if err := os.MkdirAll(sharePath, sharedDirMode); err != nil {
-		return err
-	}
-	if err := os.MkdirAll(mountPath, DirMode); err != nil {
-		return err
-	}
-
-	// slave mount so that future mountpoints under mountPath are shown in sharePath as well
-	if err := bindMount(ctx, mountPath, sharePath, true, "slave"); err != nil {
-		return err
-	}
-	defer func() {
-		if err != nil {
-			if umountErr := syscall.Unmount(sharePath, syscall.MNT_DETACH|UmountNoFollow); umountErr != nil {
-				k.Logger().WithError(umountErr).Errorf("failed to unmount vm share path %s", sharePath)
-			}
-		}
-	}()
-
-	// Setup sandbox bindmounts, if specified:
-	if err = k.setupSandboxBindMounts(ctx, sandbox); err != nil {
-		return err
-	}
-
-	return nil
-}
-
 func (k *kataAgent) createSandbox(ctx context.Context, sandbox *Sandbox) error {
 	span, ctx := katatrace.Trace(ctx, k.Logger(), "createSandbox", kataAgentTracingTags)
 	defer span.End()
 
-	if err := k.setupSharedPath(ctx, sandbox); err != nil {
-		return err
-	}
 	return k.configure(ctx, sandbox.hypervisor, sandbox.id, GetSharePath(sandbox.id), sandbox.config.AgentConfig)
 }
 
@@ -1063,7 +949,7 @@ func (k *kataAgent) constrainGRPCSpec(grpcSpec *grpc.Spec, passSeccomp bool, str
 	// - Initrd image doesn't have systemd.
 	// - Nobody will be able to modify the resources of a specific container by using systemctl set-property.
 	// - docker is not running in the VM.
-	if vccgroups.IsSystemdCgroup(grpcSpec.Linux.CgroupsPath) {
+	if resCtrl.IsSystemdCgroup(grpcSpec.Linux.CgroupsPath) {
 		// Convert systemd cgroup to cgroupfs
 		slice := strings.Split(grpcSpec.Linux.CgroupsPath, ":")
 		// 0 - slice: system.slice
@@ -1274,163 +1160,18 @@ func (k *kataAgent) rollbackFailingContainerCreation(ctx context.Context, c *Con
 			k.Logger().WithError(err2).Error("rollback failed unmountHostMounts()")
 		}
 
-		if c.rootFs.Type == NydusRootFSType {
-			if err2 := nydusContainerCleanup(ctx, getMountPath(c.sandbox.id), c); err2 != nil {
-				k.Logger().WithError(err2).Error("rollback failed nydusContainerCleanup")
-			}
-		} else {
-			if err2 := bindUnmountContainerRootfs(ctx, getMountPath(c.sandbox.id), c.id); err2 != nil {
-				k.Logger().WithError(err2).Error("rollback failed bindUnmountContainerRootfs()")
-			}
+		if err2 := c.sandbox.fsShare.UnshareRootFilesystem(ctx, c); err2 != nil {
+			k.Logger().WithError(err2).Error("rollback failed UnshareRootfs()")
 		}
 	}
 }
 
-func getVirtiofsDaemonForNydus(sandbox *Sandbox) (VirtiofsDaemon, error) {
-	var virtiofsDaemon VirtiofsDaemon
-	switch sandbox.GetHypervisorType() {
-	case string(QemuHypervisor):
-		virtiofsDaemon = sandbox.hypervisor.(*qemu).virtiofsDaemon
-	case string(ClhHypervisor):
-		virtiofsDaemon = sandbox.hypervisor.(*cloudHypervisor).virtiofsDaemon
-	default:
-		return nil, errNydusdNotSupport
-	}
-	return virtiofsDaemon, nil
-}
-
-func (k *kataAgent) buildContainerRootfsWithNydus(sandbox *Sandbox, c *Container, rootPathParent string) (*grpc.Storage, error) {
-	virtiofsDaemon, err := getVirtiofsDaemonForNydus(sandbox)
-	if err != nil {
-		return nil, err
-	}
-	extraOption, err := parseExtraOption(c.rootFs.Options)
-	if err != nil {
-		return nil, err
-	}
-	mountOpt := &MountOption{
-		mountpoint: rafsMountPath(c.id),
-		source:     extraOption.Source,
-		config:     extraOption.Config,
-	}
-	k.Logger().Infof("nydus option: %v", extraOption)
-	// mount lowerdir to guest /run/kata-containers/shared/images/<cid>/lowerdir
-	if err := virtiofsDaemon.Mount(*mountOpt); err != nil {
-		return nil, err
-	}
-	rootfs := &grpc.Storage{}
-	containerShareDir := filepath.Join(getMountPath(c.sandbox.id), c.id)
-
-	// mkdir rootfs, guest at /run/kata-containers/shared/containers/<cid>/rootfs
-	rootfsDir := filepath.Join(containerShareDir, c.rootfsSuffix)
-	if err := os.MkdirAll(rootfsDir, DirMode); err != nil {
-		return nil, err
-	}
-	// bindmount snapshot dir which snapshotter allocated
-	// to guest /run/kata-containers/shared/containers/<cid>/snapshotdir
-	snapshotShareDir := filepath.Join(containerShareDir, snapshotDir)
-	if err := bindMount(k.ctx, extraOption.Snapshotdir, snapshotShareDir, true, "slave"); err != nil {
-		return nil, err
-	}
-
-	// so rootfs = overlay(upperdir, workerdir, lowerdir)
-	rootfs.MountPoint = filepath.Join(rootPathParent, c.rootfsSuffix)
-	rootfs.Source = typeOverlayFS
-	rootfs.Fstype = typeOverlayFS
-	rootfs.Driver = kataOverlayDevType
-	rootfs.Options = append(rootfs.Options, fmt.Sprintf("%s=%s", upperDir, filepath.Join(kataGuestSharedDir(), c.id, snapshotDir, "fs")))
-	rootfs.Options = append(rootfs.Options, fmt.Sprintf("%s=%s", workDir, filepath.Join(kataGuestSharedDir(), c.id, snapshotDir, "work")))
-	rootfs.Options = append(rootfs.Options, fmt.Sprintf("%s=%s", lowerDir, filepath.Join(kataGuestNydusImageDir(), c.id, lowerDir)))
-	rootfs.Options = append(rootfs.Options, "index=off")
-	k.Logger().Infof("rootfs info: %#v\n", rootfs)
-	return rootfs, nil
-}
-
-func (k *kataAgent) buildContainerRootfs(ctx context.Context, sandbox *Sandbox, c *Container, rootPathParent string) (*grpc.Storage, error) {
-	// In the confidential computing, there is no Image information on the host,
-	// so there is no Rootfs.Target.
-	if sandbox.config.ServiceOffload && c.rootFs.Target == "" {
-		return nil, nil
-	}
-	if c.rootFs.Type == NydusRootFSType {
-		return k.buildContainerRootfsWithNydus(sandbox, c, rootPathParent)
-	}
-	if c.state.Fstype != "" && c.state.BlockDeviceID != "" {
-		// The rootfs storage volume represents the container rootfs
-		// mount point inside the guest.
-		// It can be a block based device (when using block based container
-		// overlay on the host) mount or a 9pfs one (for all other overlay
-		// implementations).
-		rootfs := &grpc.Storage{}
-
-		// This is a block based device rootfs.
-		device := sandbox.devManager.GetDeviceByID(c.state.BlockDeviceID)
-		if device == nil {
-			k.Logger().WithField("device", c.state.BlockDeviceID).Error("failed to find device by id")
-			return nil, fmt.Errorf("failed to find device by id %q", c.state.BlockDeviceID)
-		}
-
-		blockDrive, ok := device.GetDeviceInfo().(*config.BlockDrive)
-		if !ok || blockDrive == nil {
-			k.Logger().Error("malformed block drive")
-			return nil, fmt.Errorf("malformed block drive")
-		}
-		switch {
-		case sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioMmio:
-			rootfs.Driver = kataMmioBlkDevType
-			rootfs.Source = blockDrive.VirtPath
-		case sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioBlockCCW:
-			rootfs.Driver = kataBlkCCWDevType
-			rootfs.Source = blockDrive.DevNo
-		case sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioBlock:
-			rootfs.Driver = kataBlkDevType
-			rootfs.Source = blockDrive.PCIPath.String()
-		case sandbox.config.HypervisorConfig.BlockDeviceDriver == config.VirtioSCSI:
-			rootfs.Driver = kataSCSIDevType
-			rootfs.Source = blockDrive.SCSIAddr
-		default:
-			return nil, fmt.Errorf("Unknown block device driver: %s", sandbox.config.HypervisorConfig.BlockDeviceDriver)
-		}
-
-		rootfs.MountPoint = rootPathParent
-		rootfs.Fstype = c.state.Fstype
-
-		if c.state.Fstype == "xfs" {
-			rootfs.Options = []string{"nouuid"}
-		}
-
-		// Ensure container mount destination exists
-		// TODO: remove dependency on shared fs path. shared fs is just one kind of storage source.
-		// we should not always use shared fs path for all kinds of storage. Instead, all storage
-		// should be bind mounted to a tmpfs path for containers to use.
-		if err := os.MkdirAll(filepath.Join(getMountPath(c.sandbox.id), c.id, c.rootfsSuffix), DirMode); err != nil {
-			return nil, err
-		}
-		return rootfs, nil
-	}
-
-	// This is not a block based device rootfs. We are going to bind mount it into the shared drive
-	// between the host and the guest.
-	// With virtiofs/9pfs we don't need to ask the agent to mount the rootfs as the shared directory
-	// (kataGuestSharedDir) is already mounted in the guest. We only need to mount the rootfs from
-	// the host and it will show up in the guest.
-	if err := bindMountContainerRootfs(ctx, getMountPath(sandbox.id), c.id, c.rootFs.Target, false); err != nil {
-		return nil, err
-	}
-
-	return nil, nil
-}
-
 func (k *kataAgent) createContainer(ctx context.Context, sandbox *Sandbox, c *Container) (p *Process, err error) {
 	span, ctx := katatrace.Trace(ctx, k.Logger(), "createContainer", kataAgentTracingTags)
 	defer span.End()
 	var ctrStorages []*grpc.Storage
 	var ctrDevices []*grpc.Device
-	var rootfs *grpc.Storage
-
-	// This is the guest absolute root path for that container.
-	rootPathParent := filepath.Join(kataGuestSharedDir(), c.id)
-	rootPath := filepath.Join(rootPathParent, c.rootfsSuffix)
+	var sharedRootfs *SharedFile
 
 	// In case the container creation fails, the following defer statement
 	// takes care of rolling back actions previously performed.
@@ -1441,19 +1182,19 @@ func (k *kataAgent) createContainer(ctx context.Context, sandbox *Sandbox, c *Co
 		}
 	}()
 
-	// setup rootfs -- if its block based, we'll receive a non-nil storage object representing
+	// Share the container rootfs -- if its block based, we'll receive a non-nil storage object representing
 	// the block device for the rootfs, which us utilized for mounting in the guest. This'll be handled
 	// already for non-block based rootfs
-	if rootfs, err = k.buildContainerRootfs(ctx, sandbox, c, rootPathParent); err != nil {
+	if sharedRootfs, err = sandbox.fsShare.ShareRootFilesystem(ctx, c); err != nil {
 		return nil, err
 	}
 
-	if rootfs != nil {
+	if sharedRootfs.storage != nil {
 		// Add rootfs to the list of container storage.
 		// We only need to do this for block based rootfs, as we
 		// want the agent to mount it into the right location
 		// (kataGuestSharedDir/ctrID/
-		ctrStorages = append(ctrStorages, rootfs)
+		ctrStorages = append(ctrStorages, sharedRootfs.storage)
 	}
 
 	ociSpec := c.GetPatchedOCISpec()
@@ -1529,7 +1270,7 @@ func (k *kataAgent) createContainer(ctx context.Context, sandbox *Sandbox, c *Co
 	}
 
 	// We need to give the OCI spec our absolute rootfs path in the guest.
-	grpcSpec.Root.Path = rootPath
+	grpcSpec.Root.Path = sharedRootfs.guestPath
 
 	sharedPidNs := k.handlePidNamespace(grpcSpec, sandbox)
 
@@ -2348,7 +2089,7 @@ func (k *kataAgent) copyFile(ctx context.Context, src, dst string) error {
 	cpReq := &grpc.CopyFileRequest{
 		Path:     dst,
 		DirMode:  uint32(DirMode),
-		FileMode: st.Mode,
+		FileMode: uint32(st.Mode),
 		FileSize: fileSize,
 		Uid:      int32(st.Uid),
 		Gid:      int32(st.Gid),
@@ -2398,26 +2139,7 @@ func (k *kataAgent) markDead(ctx context.Context) {
 	k.disconnect(ctx)
 }
 
-func (k *kataAgent) cleanup(ctx context.Context, s *Sandbox) {
-	if err := k.cleanupSandboxBindMounts(s); err != nil {
-		k.Logger().WithError(err).Errorf("failed to Cleanup sandbox bindmounts")
-	}
-
-	// Unmount shared path
-	path := GetSharePath(s.id)
-	k.Logger().WithField("path", path).Infof("Cleanup agent")
-	if err := syscall.Unmount(path, syscall.MNT_DETACH|UmountNoFollow); err != nil {
-		k.Logger().WithError(err).Errorf("failed to unmount vm share path %s", path)
-	}
-
-	// Unmount mount path
-	path = getMountPath(s.id)
-	if err := bindUnmountAllRootfs(ctx, path, s); err != nil {
-		k.Logger().WithError(err).Errorf("failed to unmount vm mount path %s", path)
-	}
-	if err := os.RemoveAll(getSandboxPath(s.id)); err != nil {
-		k.Logger().WithError(err).Errorf("failed to Cleanup vm path %s", getSandboxPath(s.id))
-	}
+func (k *kataAgent) cleanup(ctx context.Context) {
 }
 
 func (k *kataAgent) save() persistapi.AgentState {

src/runtime/virtcontainers/kata_agent_test.go

@@ -14,6 +14,7 @@ import (
 	"path"
 	"path/filepath"
 	"reflect"
+	"runtime"
 	"strings"
 	"syscall"
 	"testing"
@@ -21,6 +22,7 @@ import (
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/stretchr/testify/assert"
 
+	"code.cloudfoundry.org/bytefmt"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/drivers"
@@ -35,6 +37,8 @@ import (
 	vcTypes "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
 )
 
+const sysHugepagesDir = "/sys/kernel/mm/hugepages"
+
 var (
 	testBlkDriveFormat     = "testBlkDriveFormat"
 	testBlockDeviceCtrPath = "testBlockDeviceCtrPath"
@@ -50,6 +54,7 @@ func TestKataAgentConnect(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
 	err = hybridVSockTTRPCMock.Start(url)
@@ -73,6 +78,7 @@ func TestKataAgentDisconnect(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
 	err = hybridVSockTTRPCMock.Start(url)
@@ -110,6 +116,7 @@ func TestKataAgentSendReq(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
 	err = hybridVSockTTRPCMock.Start(url)
@@ -822,6 +829,10 @@ func TestAgentCreateContainer(t *testing.T) {
 		hypervisor: &mockHypervisor{},
 	}
 
+	fsShare, err := NewFilesystemShare(sandbox)
+	assert.Nil(err)
+	sandbox.fsShare = fsShare
+
 	store, err := persist.GetDriver()
 	assert.NoError(err)
 	assert.NotNil(store)
@@ -843,6 +854,7 @@ func TestAgentCreateContainer(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
 	err = hybridVSockTTRPCMock.Start(url)
@@ -873,6 +885,7 @@ func TestAgentNetworkOperation(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
 	err = hybridVSockTTRPCMock.Start(url)
@@ -921,6 +934,7 @@ func TestKataCopyFile(t *testing.T) {
 
 	url, err := mock.GenerateKataMockHybridVSock()
 	assert.NoError(err)
+	defer mock.RemoveKataMockHybridVSock(url)
 
 	hybridVSockTTRPCMock := mock.HybridVSockTTRPCMock{}
 	err = hybridVSockTTRPCMock.Start(url)
@@ -983,7 +997,7 @@ func TestKataCleanupSandbox(t *testing.T) {
 	assert.Nil(err)
 
 	k := &kataAgent{ctx: context.Background()}
-	k.cleanup(context.Background(), &s)
+	k.cleanup(context.Background())
 
 	_, err = os.Stat(dir)
 	assert.False(os.IsExist(err))
@@ -1119,119 +1133,6 @@ func TestKataAgentDirs(t *testing.T) {
 	assert.Equal(rafsMountPath(cid), expected)
 }
 
-func TestSandboxBindMount(t *testing.T) {
-	if os.Getuid() != 0 {
-		t.Skip("Test disabled as requires root user")
-	}
-
-	assert := assert.New(t)
-	// create temporary files to mount:
-	testMountPath, err := os.MkdirTemp("", "sandbox-test")
-	assert.NoError(err)
-	defer os.RemoveAll(testMountPath)
-
-	// create a new shared directory for our test:
-	kataHostSharedDirSaved := kataHostSharedDir
-	testHostDir, err := os.MkdirTemp("", "kata-Cleanup")
-	assert.NoError(err)
-	kataHostSharedDir = func() string {
-		return testHostDir
-	}
-	defer func() {
-		kataHostSharedDir = kataHostSharedDirSaved
-	}()
-
-	m1Path := filepath.Join(testMountPath, "foo.txt")
-	f1, err := os.Create(m1Path)
-	assert.NoError(err)
-	defer f1.Close()
-
-	m2Path := filepath.Join(testMountPath, "bar.txt")
-	f2, err := os.Create(m2Path)
-	assert.NoError(err)
-	defer f2.Close()
-
-	// create sandbox for mounting into
-	sandbox := &Sandbox{
-		ctx: context.Background(),
-		id:  "foobar",
-		config: &SandboxConfig{
-			SandboxBindMounts: []string{m1Path, m2Path},
-		},
-	}
-	k := &kataAgent{ctx: context.Background()}
-
-	// make the shared directory for our test:
-	dir := kataHostSharedDir()
-	err = os.MkdirAll(path.Join(dir, sandbox.id), 0777)
-	assert.Nil(err)
-	defer os.RemoveAll(dir)
-
-	sharePath := GetSharePath(sandbox.id)
-	mountPath := getMountPath(sandbox.id)
-
-	err = os.MkdirAll(sharePath, DirMode)
-	assert.Nil(err)
-	err = os.MkdirAll(mountPath, DirMode)
-	assert.Nil(err)
-
-	// setup the expeted slave mount:
-	err = bindMount(sandbox.ctx, mountPath, sharePath, true, "slave")
-	assert.Nil(err)
-	defer syscall.Unmount(sharePath, syscall.MNT_DETACH|UmountNoFollow)
-
-	// Test the function. We expect it to succeed and for the mount to exist
-	err = k.setupSandboxBindMounts(context.Background(), sandbox)
-	assert.NoError(err)
-
-	// Test the Cleanup function. We expect it to succeed for the mount to be removed.
-	err = k.cleanupSandboxBindMounts(sandbox)
-	assert.NoError(err)
-
-	// After successful Cleanup, verify there are not any mounts left behind.
-	stat := syscall.Stat_t{}
-	mount1CheckPath := filepath.Join(getMountPath(sandbox.id), sandboxMountsDir, filepath.Base(m1Path))
-	err = syscall.Stat(mount1CheckPath, &stat)
-	assert.Error(err)
-	assert.True(os.IsNotExist(err))
-
-	mount2CheckPath := filepath.Join(getMountPath(sandbox.id), sandboxMountsDir, filepath.Base(m2Path))
-	err = syscall.Stat(mount2CheckPath, &stat)
-	assert.Error(err)
-	assert.True(os.IsNotExist(err))
-
-	// Now, let's setup the Cleanup to fail. Setup the sandbox bind mount twice, which will result in
-	// extra mounts being present that the sandbox description doesn't account for (ie, duplicate mounts).
-	// We expect Cleanup to fail on the first time, since it cannot remove the sandbox-bindmount directory because
-	// there are leftover mounts.   If we run it a second time, however, it should succeed since it'll remove the
-	// second set of mounts:
-	err = k.setupSandboxBindMounts(context.Background(), sandbox)
-	assert.NoError(err)
-	err = k.setupSandboxBindMounts(context.Background(), sandbox)
-	assert.NoError(err)
-	// Test the Cleanup function. We expect it to succeed for the mount to be removed.
-	err = k.cleanupSandboxBindMounts(sandbox)
-	assert.Error(err)
-	err = k.cleanupSandboxBindMounts(sandbox)
-	assert.NoError(err)
-
-	//
-	// Now, let's setup the sandbox bindmount to fail, and verify that no mounts are left behind
-	//
-	sandbox.config.SandboxBindMounts = append(sandbox.config.SandboxBindMounts, "oh-nos")
-	err = k.setupSandboxBindMounts(context.Background(), sandbox)
-	assert.Error(err)
-	// Verify there aren't any mounts left behind
-	stat = syscall.Stat_t{}
-	err = syscall.Stat(mount1CheckPath, &stat)
-	assert.Error(err)
-	assert.True(os.IsNotExist(err))
-	err = syscall.Stat(mount2CheckPath, &stat)
-	assert.Error(err)
-	assert.True(os.IsNotExist(err))
-
-}
-
 func TestHandleHugepages(t *testing.T) {
 	if os.Getuid() != 0 {
 		t.Skip("Test disabled as requires root user")
@@ -1244,18 +1145,36 @@ func TestHandleHugepages(t *testing.T) {
 	defer os.RemoveAll(dir)
 
 	k := kataAgent{}
+	var formattedSizes []string
 	var mounts []specs.Mount
 	var hugepageLimits []specs.LinuxHugepageLimit
 
-	hugepageDirs := [2]string{"hugepages-1Gi", "hugepages-2Mi"}
-	options := [2]string{"pagesize=1024M", "pagesize=2M"}
+	// On s390x, hugepage sizes must be set at boot and cannot be created ad hoc. Use any that
+	// are present (default is 1M, can only be changed on LPAR). See
+	// https://www.ibm.com/docs/en/linuxonibm/pdf/lku5dd05.pdf, p. 345 for more information.
+	if runtime.GOARCH == "s390x" {
+		dirs, err := ioutil.ReadDir(sysHugepagesDir)
+		assert.Nil(err)
+		for _, dir := range dirs {
+			formattedSizes = append(formattedSizes, strings.TrimPrefix(dir.Name(), "hugepages-"))
+		}
+	} else {
+		formattedSizes = []string{"1G", "2M"}
+	}
 
-	for i := 0; i < 2; i++ {
-		target := path.Join(dir, hugepageDirs[i])
-		err := os.MkdirAll(target, 0777)
+	for _, formattedSize := range formattedSizes {
+		bytes, err := bytefmt.ToBytes(formattedSize)
+		assert.Nil(err)
+		hugepageLimits = append(hugepageLimits, specs.LinuxHugepageLimit{
+			Pagesize: formattedSize,
+			Limit:    1_000_000 * bytes,
+		})
+
+		target := path.Join(dir, fmt.Sprintf("hugepages-%s", formattedSize))
+		err = os.MkdirAll(target, 0777)
 		assert.NoError(err, "Unable to create dir %s", target)
 
-		err = syscall.Mount("nodev", target, "hugetlbfs", uintptr(0), options[i])
+		err = syscall.Mount("nodev", target, "hugetlbfs", uintptr(0), fmt.Sprintf("pagesize=%s", formattedSize))
 		assert.NoError(err, "Unable to mount %s", target)
 
 		defer syscall.Unmount(target, 0)
@@ -1267,21 +1186,10 @@ func TestHandleHugepages(t *testing.T) {
 		mounts = append(mounts, mount)
 	}
 
-	hugepageLimits = []specs.LinuxHugepageLimit{
-		{
-			Pagesize: "1GB",
-			Limit:    1073741824,
-		},
-		{
-			Pagesize: "2MB",
-			Limit:    134217728,
-		},
-	}
-
 	hugepages, err := k.handleHugepages(mounts, hugepageLimits)
 
 	assert.NoError(err, "Unable to handle hugepages %v", hugepageLimits)
 	assert.NotNil(hugepages)
-	assert.Equal(len(hugepages), 2)
+	assert.Equal(len(hugepages), len(formattedSizes))
 
 }

src/runtime/virtcontainers/macvlan_endpoint.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/macvlan_endpoint_test.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/macvtap_endpoint.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/macvtap_endpoint_test.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/mock_agent.go

@@ -225,7 +225,7 @@ func (n *mockAgent) addSwap(ctx context.Context, PCIPath vcTypes.PciPath) error
 func (n *mockAgent) markDead(ctx context.Context) {
 }
 
-func (n *mockAgent) cleanup(ctx context.Context, s *Sandbox) {
+func (n *mockAgent) cleanup(ctx context.Context) {
 }
 
 // save is the Noop agent state saver. It does nothing.

src/runtime/virtcontainers/mount.go

@@ -144,8 +144,8 @@ func getDeviceForPath(path string) (device, error) {
 
 	if isHostDevice(path) {
 		// stat.Rdev describes the device that this file (inode) represents.
-		devMajor = major(stat.Rdev)
-		devMinor = minor(stat.Rdev)
+		devMajor = major(uint64(stat.Rdev))
+		devMinor = minor(uint64(stat.Rdev))
 
 		return device{
 			major:      devMajor,
@@ -154,8 +154,8 @@ func getDeviceForPath(path string) (device, error) {
 		}, nil
 	}
 	// stat.Dev points to the underlying device containing the file
-	devMajor = major(stat.Dev)
-	devMinor = minor(stat.Dev)
+	devMajor = major(uint64(stat.Dev))
+	devMinor = minor(uint64(stat.Dev))
 
 	path, err = filepath.Abs(path)
 	if err != nil {
@@ -388,6 +388,19 @@ func bindUnmountContainerSnapshotDir(ctx context.Context, sharedDir, cID string)
 	return bindUnmountContainerShareDir(ctx, sharedDir, cID, snapshotDir)
 }
 
+func getVirtiofsDaemonForNydus(sandbox *Sandbox) (VirtiofsDaemon, error) {
+	var virtiofsDaemon VirtiofsDaemon
+	switch sandbox.GetHypervisorType() {
+	case string(QemuHypervisor):
+		virtiofsDaemon = sandbox.hypervisor.(*qemu).virtiofsDaemon
+	case string(ClhHypervisor):
+		virtiofsDaemon = sandbox.hypervisor.(*cloudHypervisor).virtiofsDaemon
+	default:
+		return nil, errNydusdNotSupport
+	}
+	return virtiofsDaemon, nil
+}
+
 func nydusContainerCleanup(ctx context.Context, sharedDir string, c *Container) error {
 	sandbox := c.sandbox
 	virtiofsDaemon, err := getVirtiofsDaemonForNydus(sandbox)

src/runtime/virtcontainers/nydusd.go

@@ -104,12 +104,13 @@ func (nd *nydusd) Start(ctx context.Context, onQuit onQuitFunc) (int, error) {
 		return pid, err
 	}
 	cmd := exec.Command(nd.path, args...)
-	r, w, err := os.Pipe()
+	stdout, err := cmd.StdoutPipe()
 	if err != nil {
 		return pid, err
 	}
-	cmd.Stdout = w
-	cmd.Stderr = w
+
+	cmd.Stderr = cmd.Stdout
+
 	fields := logrus.Fields{
 		"path": nd.path,
 		"args": strings.Join(args, " "),
@@ -120,7 +121,7 @@ func (nd *nydusd) Start(ctx context.Context, onQuit onQuitFunc) (int, error) {
 	}
 	// Monitor nydusd's stdout/stderr and stop sandbox if nydusd quits
 	go func() {
-		scanner := bufio.NewScanner(r)
+		scanner := bufio.NewScanner(stdout)
 		for scanner.Scan() {
 			nd.Logger().Info(scanner.Text())
 		}

src/runtime/virtcontainers/physical_endpoint.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -14,10 +15,10 @@ import (
 	"path/filepath"
 	"strings"
 
+	resCtrl "github.com/kata-containers/kata-containers/src/runtime/pkg/resourcecontrol"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/drivers"
 	persistapi "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/persist/api"
-	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/pkg/cgroups"
 	vcTypes "github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
 	"github.com/safchain/ethtool"
 )
@@ -89,7 +90,7 @@ func (endpoint *PhysicalEndpoint) Attach(ctx context.Context, s *Sandbox) error
 		return err
 	}
 
-	c, err := cgroups.DeviceToCgroupDeviceRule(vfioPath)
+	c, err := resCtrl.DeviceToCgroupDeviceRule(vfioPath)
 	if err != nil {
 		return err
 	}

src/runtime/virtcontainers/physical_endpoint_test.go

@@ -1,5 +1,6 @@
+//go:build linux
 // +build linux
-//
+
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/pkg/cloud-hypervisor/client/api/openapi.yaml

@@ -181,6 +181,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/PciDeviceInfo'
           description: The new device was successfully added to the VM instance.
+        "204":
+          description: The new device was successfully (cold) added to the VM instance.
         "404":
           description: The new device could not be added to the VM instance.
       summary: Add a new device to the VM
@@ -215,6 +217,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/PciDeviceInfo'
           description: The new disk was successfully added to the VM instance.
+        "204":
+          description: The new disk was successfully (cold) added to the VM instance.
         "500":
           description: The new disk could not be added to the VM instance.
       summary: Add a new disk to the VM
@@ -234,6 +238,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/PciDeviceInfo'
           description: The new device was successfully added to the VM instance.
+        "204":
+          description: The new device was successfully (cold) added to the VM instance.
         "500":
           description: The new device could not be added to the VM instance.
       summary: Add a new virtio-fs device to the VM
@@ -253,6 +259,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/PciDeviceInfo'
           description: The new device was successfully added to the VM instance.
+        "204":
+          description: The new device was successfully (cold) added to the VM instance.
         "500":
           description: The new device could not be added to the VM instance.
       summary: Add a new pmem device to the VM
@@ -272,6 +280,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/PciDeviceInfo'
           description: The new device was successfully added to the VM instance.
+        "204":
+          description: The new device was successfully (cold) added to the VM instance.
         "500":
           description: The new device could not be added to the VM instance.
       summary: Add a new network device to the VM
@@ -291,6 +301,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/PciDeviceInfo'
           description: The new device was successfully added to the VM instance.
+        "204":
+          description: The new device was successfully (cold) added to the VM instance.
         "500":
           description: The new device could not be added to the VM instance.
       summary: Add a new vsock device to the VM
@@ -632,7 +644,7 @@ components:
             children:
             - children
             - children
-            pci_bdf: 3
+            pci_bdf: pci_bdf
             resources:
             - '{}'
             - '{}'
@@ -663,7 +675,7 @@ components:
         children:
         - children
         - children
-        pci_bdf: 3
+        pci_bdf: pci_bdf
         resources:
         - '{}'
         - '{}'
@@ -680,8 +692,7 @@ components:
             type: string
           type: array
         pci_bdf:
-          format: int32
-          type: integer
+          type: string
       type: object
     VmCounters:
       additionalProperties:
@@ -1757,6 +1768,8 @@ components:
       properties:
         receiver_url:
           type: string
+      required:
+      - receiver_url
       type: object
     SendMigrationData:
       example:
@@ -1767,4 +1780,6 @@ components:
           type: string
         local:
           type: boolean
+      required:
+      - destination_url
       type: object

src/runtime/virtcontainers/pkg/cloud-hypervisor/client/docs/DefaultApi.md

@@ -1071,7 +1071,7 @@ import (
 )
 
 func main() {
-    receiveMigrationData := *openapiclient.NewReceiveMigrationData() // ReceiveMigrationData | The URL for the reception of migration state
+    receiveMigrationData := *openapiclient.NewReceiveMigrationData("ReceiverUrl_example") // ReceiveMigrationData | The URL for the reception of migration state
 
     configuration := openapiclient.NewConfiguration()
     api_client := openapiclient.NewAPIClient(configuration)
@@ -1381,7 +1381,7 @@ import (
 )
 
 func main() {
-    sendMigrationData := *openapiclient.NewSendMigrationData() // SendMigrationData | The URL for sending the migration state
+    sendMigrationData := *openapiclient.NewSendMigrationData("DestinationUrl_example") // SendMigrationData | The URL for sending the migration state
 
     configuration := openapiclient.NewConfiguration()
     api_client := openapiclient.NewAPIClient(configuration)

src/runtime/virtcontainers/pkg/cloud-hypervisor/client/docs/DeviceNode.md

@@ -7,7 +7,7 @@ Name | Type | Description | Notes
 **Id** | Pointer to **string** |  | [optional] 
 **Resources** | Pointer to **[]map[string]interface{}** |  | [optional] 
 **Children** | Pointer to **[]string** |  | [optional] 
-**PciBdf** | Pointer to **int32** |  | [optional] 
+**PciBdf** | Pointer to **string** |  | [optional] 
 
 ## Methods
 
@@ -105,20 +105,20 @@ HasChildren returns a boolean if a field has been set.
 
 ### GetPciBdf
 
-`func (o *DeviceNode) GetPciBdf() int32`
+`func (o *DeviceNode) GetPciBdf() string`
 
 GetPciBdf returns the PciBdf field if non-nil, zero value otherwise.
 
 ### GetPciBdfOk
 
-`func (o *DeviceNode) GetPciBdfOk() (*int32, bool)`
+`func (o *DeviceNode) GetPciBdfOk() (*string, bool)`
 
 GetPciBdfOk returns a tuple with the PciBdf field if it's non-nil, zero value otherwise
 and a boolean to check if the value has been set.
 
 ### SetPciBdf
 
-`func (o *DeviceNode) SetPciBdf(v int32)`
+`func (o *DeviceNode) SetPciBdf(v string)`
 
 SetPciBdf sets PciBdf field to given value.