Merge pull request #196 from caoruidong/add-spec

cli: implement spec command

Gopkg.lock

@@ -114,6 +114,8 @@
   name = "github.com/opencontainers/runc"
   packages = [
     "libcontainer/configs",
+    "libcontainer/seccomp",
+    "libcontainer/specconv",
     "libcontainer/utils"
   ]
   revision = "0351df1c5a66838d0c392b4ac4cf9450de844e2d"
@@ -134,6 +136,12 @@
   packages = ["."]
   revision = "79559b488d8848b53a8e34c330140c3fc37ee246"
 
+[[projects]]
+  name = "github.com/seccomp/libseccomp-golang"
+  packages = ["."]
+  revision = "e3496e3a417d1dc9ecdceca5af2513271fed37a0"
+  version = "v0.9.0"
+
 [[projects]]
   name = "github.com/sirupsen/logrus"
   packages = [
@@ -249,6 +257,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "cd6f57ab58ff674de73039bb4337cd1f2b24d069199704c510f8950e1121f395"
+  inputs-digest = "dd9532d9bae03bb3dc43414908beecb8b498c14bea354e261341ff81dbf01b4d"
   solver-name = "gps-cdcl"
   solver-version = 1

cli/main.go

@@ -119,6 +119,7 @@ var runtimeCommands = []cli.Command{
 	psCLICommand,
 	resumeCLICommand,
 	runCLICommand,
+	specCLICommand,
 	startCLICommand,
 	stateCLICommand,
 	versionCLICommand,

cli/spec.go

@@ -0,0 +1,105 @@
+// Copyright (c) 2014,2015,2016,2017 Docker, Inc.
+// Copyright (c) 2018 Huawei Corporation.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/opencontainers/runc/libcontainer/specconv"
+	"github.com/urfave/cli"
+)
+
+var specCLICommand = cli.Command{
+	Name:      "spec",
+	Usage:     "create a new specification file",
+	ArgsUsage: "",
+	Description: `The spec command creates the new specification file named "` + specConfig + `" for
+the bundle.
+
+The spec generated is just a starter file. Editing of the spec is required to
+achieve desired results. For example, the newly generated spec includes an args
+parameter that is initially set to call the "sh" command when the container is
+started. Calling "sh" may work for an ubuntu container or busybox, but will not
+work for containers that do not include the "sh" program.
+
+EXAMPLE:
+  To run docker's hello-world container one needs to set the args parameter
+in the spec to call hello. This can be done using the sed command or a text
+editor. The following commands create a bundle for hello-world, change the
+default args parameter in the spec from "sh" to "/hello", then run the hello
+command in a new hello-world container named container1:
+
+    mkdir hello
+    cd hello
+    docker pull hello-world
+    docker export $(docker create hello-world) > hello-world.tar
+    mkdir rootfs
+    tar -C rootfs -xf hello-world.tar
+    kata-runtime spec
+    sed -i 's;"sh";"/hello";' ` + specConfig + `
+    kata-runtime run container1
+
+In the run command above, "container1" is the name for the instance of the
+container that you are starting. The name you provide for the container instance
+must be unique on your host.
+
+An alternative for generating a customized spec config is to use "oci-runtime-tool", the
+sub-command "oci-runtime-tool generate" has lots of options that can be used to do any
+customizations as you want, see runtime-tools (https://github.com/opencontainers/runtime-tools)
+to get more information.
+
+When starting a container through kata-runtime, kata-runtime needs root privilege. If not
+already running as root, you can use sudo to give kata-runtime root privilege. For
+example: "sudo kata-runtime start container1" will give kata-runtime root privilege to start the
+container on your host.
+
+Alternatively, you can start a rootless container, which has the ability to run
+without root privileges. For this to work, the specification file needs to be
+adjusted accordingly. You can pass the parameter --rootless to this command to
+generate a proper rootless spec file.`,
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name:  "bundle, b",
+			Value: "",
+			Usage: "path to the root of the bundle directory",
+		},
+	},
+	Action: func(context *cli.Context) error {
+		spec := specconv.Example()
+
+		checkNoFile := func(name string) error {
+			_, err := os.Stat(name)
+			if err == nil {
+				return fmt.Errorf("File %s exists. Remove it first", name)
+			}
+			if !os.IsNotExist(err) {
+				return err
+			}
+			return nil
+		}
+		bundle := context.String("bundle")
+		if bundle != "" {
+			if err := os.Chdir(bundle); err != nil {
+				return err
+			}
+		}
+		if err := checkNoFile(specConfig); err != nil {
+			return err
+		}
+		data, err := json.MarshalIndent(spec, "", "\t")
+		if err != nil {
+			return err
+		}
+		if err := ioutil.WriteFile(specConfig, data, 0640); err != nil {
+			return err
+		}
+		return nil
+	},
+}

cli/spec_test.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2018 Huawei Corporation.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package main
+
+import (
+	"flag"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/urfave/cli"
+)
+
+func TestSpecCliAction(t *testing.T) {
+	assert := assert.New(t)
+
+	actionFunc, ok := specCLICommand.Action.(func(context *cli.Context) error)
+	assert.True(ok)
+
+	flagSet := flag.NewFlagSet("flag", flag.ContinueOnError)
+	ctx := cli.NewContext(&cli.App{}, flagSet, nil)
+	defer os.Remove(specConfig)
+	err := actionFunc(ctx)
+	assert.NoError(err)
+
+	pattern := "gid=5"
+	patternRootless := "uidMappings"
+	err = grep(pattern, specConfig)
+	assert.NoError(err)
+	err = grep(patternRootless, specConfig)
+	assert.Error(err)
+}

vendor/github.com/opencontainers/runc/libcontainer/seccomp/config.go

@@ -0,0 +1,76 @@
+package seccomp
+
+import (
+	"fmt"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+var operators = map[string]configs.Operator{
+	"SCMP_CMP_NE":        configs.NotEqualTo,
+	"SCMP_CMP_LT":        configs.LessThan,
+	"SCMP_CMP_LE":        configs.LessThanOrEqualTo,
+	"SCMP_CMP_EQ":        configs.EqualTo,
+	"SCMP_CMP_GE":        configs.GreaterThanOrEqualTo,
+	"SCMP_CMP_GT":        configs.GreaterThan,
+	"SCMP_CMP_MASKED_EQ": configs.MaskEqualTo,
+}
+
+var actions = map[string]configs.Action{
+	"SCMP_ACT_KILL":  configs.Kill,
+	"SCMP_ACT_ERRNO": configs.Errno,
+	"SCMP_ACT_TRAP":  configs.Trap,
+	"SCMP_ACT_ALLOW": configs.Allow,
+	"SCMP_ACT_TRACE": configs.Trace,
+}
+
+var archs = map[string]string{
+	"SCMP_ARCH_X86":         "x86",
+	"SCMP_ARCH_X86_64":      "amd64",
+	"SCMP_ARCH_X32":         "x32",
+	"SCMP_ARCH_ARM":         "arm",
+	"SCMP_ARCH_AARCH64":     "arm64",
+	"SCMP_ARCH_MIPS":        "mips",
+	"SCMP_ARCH_MIPS64":      "mips64",
+	"SCMP_ARCH_MIPS64N32":   "mips64n32",
+	"SCMP_ARCH_MIPSEL":      "mipsel",
+	"SCMP_ARCH_MIPSEL64":    "mipsel64",
+	"SCMP_ARCH_MIPSEL64N32": "mipsel64n32",
+	"SCMP_ARCH_PPC":         "ppc",
+	"SCMP_ARCH_PPC64":       "ppc64",
+	"SCMP_ARCH_PPC64LE":     "ppc64le",
+	"SCMP_ARCH_S390":        "s390",
+	"SCMP_ARCH_S390X":       "s390x",
+}
+
+// ConvertStringToOperator converts a string into a Seccomp comparison operator.
+// Comparison operators use the names they are assigned by Libseccomp's header.
+// Attempting to convert a string that is not a valid operator results in an
+// error.
+func ConvertStringToOperator(in string) (configs.Operator, error) {
+	if op, ok := operators[in]; ok == true {
+		return op, nil
+	}
+	return 0, fmt.Errorf("string %s is not a valid operator for seccomp", in)
+}
+
+// ConvertStringToAction converts a string into a Seccomp rule match action.
+// Actions use the names they are assigned in Libseccomp's header, though some
+// (notable, SCMP_ACT_TRACE) are not available in this implementation and will
+// return errors.
+// Attempting to convert a string that is not a valid action results in an
+// error.
+func ConvertStringToAction(in string) (configs.Action, error) {
+	if act, ok := actions[in]; ok == true {
+		return act, nil
+	}
+	return 0, fmt.Errorf("string %s is not a valid action for seccomp", in)
+}
+
+// ConvertStringToArch converts a string into a Seccomp comparison arch.
+func ConvertStringToArch(in string) (string, error) {
+	if arch, ok := archs[in]; ok == true {
+		return arch, nil
+	}
+	return "", fmt.Errorf("string %s is not a valid arch for seccomp", in)
+}

vendor/github.com/opencontainers/runc/libcontainer/seccomp/seccomp_linux.go

@@ -0,0 +1,227 @@
+// +build linux,cgo,seccomp
+
+package seccomp
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+	libseccomp "github.com/seccomp/libseccomp-golang"
+
+	"golang.org/x/sys/unix"
+)
+
+var (
+	actAllow = libseccomp.ActAllow
+	actTrap  = libseccomp.ActTrap
+	actKill  = libseccomp.ActKill
+	actTrace = libseccomp.ActTrace.SetReturnCode(int16(unix.EPERM))
+	actErrno = libseccomp.ActErrno.SetReturnCode(int16(unix.EPERM))
+)
+
+// Filters given syscalls in a container, preventing them from being used
+// Started in the container init process, and carried over to all child processes
+// Setns calls, however, require a separate invocation, as they are not children
+// of the init until they join the namespace
+func InitSeccomp(config *configs.Seccomp) error {
+	if config == nil {
+		return fmt.Errorf("cannot initialize Seccomp - nil config passed")
+	}
+
+	defaultAction, err := getAction(config.DefaultAction)
+	if err != nil {
+		return fmt.Errorf("error initializing seccomp - invalid default action")
+	}
+
+	filter, err := libseccomp.NewFilter(defaultAction)
+	if err != nil {
+		return fmt.Errorf("error creating filter: %s", err)
+	}
+
+	// Add extra architectures
+	for _, arch := range config.Architectures {
+		scmpArch, err := libseccomp.GetArchFromString(arch)
+		if err != nil {
+			return err
+		}
+
+		if err := filter.AddArch(scmpArch); err != nil {
+			return err
+		}
+	}
+
+	// Unset no new privs bit
+	if err := filter.SetNoNewPrivsBit(false); err != nil {
+		return fmt.Errorf("error setting no new privileges: %s", err)
+	}
+
+	// Add a rule for each syscall
+	for _, call := range config.Syscalls {
+		if call == nil {
+			return fmt.Errorf("encountered nil syscall while initializing Seccomp")
+		}
+
+		if err = matchCall(filter, call); err != nil {
+			return err
+		}
+	}
+
+	if err = filter.Load(); err != nil {
+		return fmt.Errorf("error loading seccomp filter into kernel: %s", err)
+	}
+
+	return nil
+}
+
+// IsEnabled returns if the kernel has been configured to support seccomp.
+func IsEnabled() bool {
+	// Try to read from /proc/self/status for kernels > 3.8
+	s, err := parseStatusFile("/proc/self/status")
+	if err != nil {
+		// Check if Seccomp is supported, via CONFIG_SECCOMP.
+		if err := unix.Prctl(unix.PR_GET_SECCOMP, 0, 0, 0, 0); err != unix.EINVAL {
+			// Make sure the kernel has CONFIG_SECCOMP_FILTER.
+			if err := unix.Prctl(unix.PR_SET_SECCOMP, unix.SECCOMP_MODE_FILTER, 0, 0, 0); err != unix.EINVAL {
+				return true
+			}
+		}
+		return false
+	}
+	_, ok := s["Seccomp"]
+	return ok
+}
+
+// Convert Libcontainer Action to Libseccomp ScmpAction
+func getAction(act configs.Action) (libseccomp.ScmpAction, error) {
+	switch act {
+	case configs.Kill:
+		return actKill, nil
+	case configs.Errno:
+		return actErrno, nil
+	case configs.Trap:
+		return actTrap, nil
+	case configs.Allow:
+		return actAllow, nil
+	case configs.Trace:
+		return actTrace, nil
+	default:
+		return libseccomp.ActInvalid, fmt.Errorf("invalid action, cannot use in rule")
+	}
+}
+
+// Convert Libcontainer Operator to Libseccomp ScmpCompareOp
+func getOperator(op configs.Operator) (libseccomp.ScmpCompareOp, error) {
+	switch op {
+	case configs.EqualTo:
+		return libseccomp.CompareEqual, nil
+	case configs.NotEqualTo:
+		return libseccomp.CompareNotEqual, nil
+	case configs.GreaterThan:
+		return libseccomp.CompareGreater, nil
+	case configs.GreaterThanOrEqualTo:
+		return libseccomp.CompareGreaterEqual, nil
+	case configs.LessThan:
+		return libseccomp.CompareLess, nil
+	case configs.LessThanOrEqualTo:
+		return libseccomp.CompareLessOrEqual, nil
+	case configs.MaskEqualTo:
+		return libseccomp.CompareMaskedEqual, nil
+	default:
+		return libseccomp.CompareInvalid, fmt.Errorf("invalid operator, cannot use in rule")
+	}
+}
+
+// Convert Libcontainer Arg to Libseccomp ScmpCondition
+func getCondition(arg *configs.Arg) (libseccomp.ScmpCondition, error) {
+	cond := libseccomp.ScmpCondition{}
+
+	if arg == nil {
+		return cond, fmt.Errorf("cannot convert nil to syscall condition")
+	}
+
+	op, err := getOperator(arg.Op)
+	if err != nil {
+		return cond, err
+	}
+
+	return libseccomp.MakeCondition(arg.Index, op, arg.Value, arg.ValueTwo)
+}
+
+// Add a rule to match a single syscall
+func matchCall(filter *libseccomp.ScmpFilter, call *configs.Syscall) error {
+	if call == nil || filter == nil {
+		return fmt.Errorf("cannot use nil as syscall to block")
+	}
+
+	if len(call.Name) == 0 {
+		return fmt.Errorf("empty string is not a valid syscall")
+	}
+
+	// If we can't resolve the syscall, assume it's not supported on this kernel
+	// Ignore it, don't error out
+	callNum, err := libseccomp.GetSyscallFromName(call.Name)
+	if err != nil {
+		return nil
+	}
+
+	// Convert the call's action to the libseccomp equivalent
+	callAct, err := getAction(call.Action)
+	if err != nil {
+		return err
+	}
+
+	// Unconditional match - just add the rule
+	if len(call.Args) == 0 {
+		if err = filter.AddRule(callNum, callAct); err != nil {
+			return err
+		}
+	} else {
+		// Conditional match - convert the per-arg rules into library format
+		conditions := []libseccomp.ScmpCondition{}
+
+		for _, cond := range call.Args {
+			newCond, err := getCondition(cond)
+			if err != nil {
+				return err
+			}
+
+			conditions = append(conditions, newCond)
+		}
+
+		if err = filter.AddRuleConditional(callNum, callAct, conditions); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func parseStatusFile(path string) (map[string]string, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	s := bufio.NewScanner(f)
+	status := make(map[string]string)
+
+	for s.Scan() {
+		text := s.Text()
+		parts := strings.Split(text, ":")
+
+		if len(parts) <= 1 {
+			continue
+		}
+
+		status[parts[0]] = parts[1]
+	}
+	if err := s.Err(); err != nil {
+		return nil, err
+	}
+
+	return status, nil
+}

vendor/github.com/opencontainers/runc/libcontainer/seccomp/seccomp_unsupported.go

@@ -0,0 +1,24 @@
+// +build !linux !cgo !seccomp
+
+package seccomp
+
+import (
+	"errors"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+)
+
+var ErrSeccompNotEnabled = errors.New("seccomp: config provided but seccomp not supported")
+
+// InitSeccomp does nothing because seccomp is not supported.
+func InitSeccomp(config *configs.Seccomp) error {
+	if config != nil {
+		return ErrSeccompNotEnabled
+	}
+	return nil
+}
+
+// IsEnabled returns false, because it is not supported.
+func IsEnabled() bool {
+	return false
+}

vendor/github.com/opencontainers/runc/libcontainer/specconv/example.go

@@ -0,0 +1,220 @@
+package specconv
+
+import (
+	"os"
+	"strings"
+
+	"github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// Example returns an example spec file, with many options set so a user can
+// see what a standard spec file looks like.
+func Example() *specs.Spec {
+	return &specs.Spec{
+		Version: specs.Version,
+		Root: &specs.Root{
+			Path:     "rootfs",
+			Readonly: true,
+		},
+		Process: &specs.Process{
+			Terminal: true,
+			User:     specs.User{},
+			Args: []string{
+				"sh",
+			},
+			Env: []string{
+				"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+				"TERM=xterm",
+			},
+			Cwd:             "/",
+			NoNewPrivileges: true,
+			Capabilities: &specs.LinuxCapabilities{
+				Bounding: []string{
+					"CAP_AUDIT_WRITE",
+					"CAP_KILL",
+					"CAP_NET_BIND_SERVICE",
+				},
+				Permitted: []string{
+					"CAP_AUDIT_WRITE",
+					"CAP_KILL",
+					"CAP_NET_BIND_SERVICE",
+				},
+				Inheritable: []string{
+					"CAP_AUDIT_WRITE",
+					"CAP_KILL",
+					"CAP_NET_BIND_SERVICE",
+				},
+				Ambient: []string{
+					"CAP_AUDIT_WRITE",
+					"CAP_KILL",
+					"CAP_NET_BIND_SERVICE",
+				},
+				Effective: []string{
+					"CAP_AUDIT_WRITE",
+					"CAP_KILL",
+					"CAP_NET_BIND_SERVICE",
+				},
+			},
+			Rlimits: []specs.POSIXRlimit{
+				{
+					Type: "RLIMIT_NOFILE",
+					Hard: uint64(1024),
+					Soft: uint64(1024),
+				},
+			},
+		},
+		Hostname: "runc",
+		Mounts: []specs.Mount{
+			{
+				Destination: "/proc",
+				Type:        "proc",
+				Source:      "proc",
+				Options:     nil,
+			},
+			{
+				Destination: "/dev",
+				Type:        "tmpfs",
+				Source:      "tmpfs",
+				Options:     []string{"nosuid", "strictatime", "mode=755", "size=65536k"},
+			},
+			{
+				Destination: "/dev/pts",
+				Type:        "devpts",
+				Source:      "devpts",
+				Options:     []string{"nosuid", "noexec", "newinstance", "ptmxmode=0666", "mode=0620", "gid=5"},
+			},
+			{
+				Destination: "/dev/shm",
+				Type:        "tmpfs",
+				Source:      "shm",
+				Options:     []string{"nosuid", "noexec", "nodev", "mode=1777", "size=65536k"},
+			},
+			{
+				Destination: "/dev/mqueue",
+				Type:        "mqueue",
+				Source:      "mqueue",
+				Options:     []string{"nosuid", "noexec", "nodev"},
+			},
+			{
+				Destination: "/sys",
+				Type:        "sysfs",
+				Source:      "sysfs",
+				Options:     []string{"nosuid", "noexec", "nodev", "ro"},
+			},
+			{
+				Destination: "/sys/fs/cgroup",
+				Type:        "cgroup",
+				Source:      "cgroup",
+				Options:     []string{"nosuid", "noexec", "nodev", "relatime", "ro"},
+			},
+		},
+		Linux: &specs.Linux{
+			MaskedPaths: []string{
+				"/proc/kcore",
+				"/proc/latency_stats",
+				"/proc/timer_list",
+				"/proc/timer_stats",
+				"/proc/sched_debug",
+				"/sys/firmware",
+			},
+			ReadonlyPaths: []string{
+				"/proc/asound",
+				"/proc/bus",
+				"/proc/fs",
+				"/proc/irq",
+				"/proc/sys",
+				"/proc/sysrq-trigger",
+			},
+			Resources: &specs.LinuxResources{
+				Devices: []specs.LinuxDeviceCgroup{
+					{
+						Allow:  false,
+						Access: "rwm",
+					},
+				},
+			},
+			Namespaces: []specs.LinuxNamespace{
+				{
+					Type: "pid",
+				},
+				{
+					Type: "network",
+				},
+				{
+					Type: "ipc",
+				},
+				{
+					Type: "uts",
+				},
+				{
+					Type: "mount",
+				},
+			},
+		},
+	}
+}
+
+// ExampleRootless returns an example spec file that works with rootless
+// containers. It's essentially a modified version of the specfile from
+// Example().
+func ToRootless(spec *specs.Spec) {
+	var namespaces []specs.LinuxNamespace
+
+	// Remove networkns from the spec.
+	for _, ns := range spec.Linux.Namespaces {
+		switch ns.Type {
+		case specs.NetworkNamespace, specs.UserNamespace:
+			// Do nothing.
+		default:
+			namespaces = append(namespaces, ns)
+		}
+	}
+	// Add userns to the spec.
+	namespaces = append(namespaces, specs.LinuxNamespace{
+		Type: specs.UserNamespace,
+	})
+	spec.Linux.Namespaces = namespaces
+
+	// Add mappings for the current user.
+	spec.Linux.UIDMappings = []specs.LinuxIDMapping{{
+		HostID:      uint32(os.Geteuid()),
+		ContainerID: 0,
+		Size:        1,
+	}}
+	spec.Linux.GIDMappings = []specs.LinuxIDMapping{{
+		HostID:      uint32(os.Getegid()),
+		ContainerID: 0,
+		Size:        1,
+	}}
+
+	// Fix up mounts.
+	var mounts []specs.Mount
+	for _, mount := range spec.Mounts {
+		// Ignore all mounts that are under /sys.
+		if strings.HasPrefix(mount.Destination, "/sys") {
+			continue
+		}
+
+		// Remove all gid= and uid= mappings.
+		var options []string
+		for _, option := range mount.Options {
+			if !strings.HasPrefix(option, "gid=") && !strings.HasPrefix(option, "uid=") {
+				options = append(options, option)
+			}
+		}
+
+		mount.Options = options
+		mounts = append(mounts, mount)
+	}
+	// Add the sysfs mount as an rbind.
+	mounts = append(mounts, specs.Mount{
+		Source:      "/sys",
+		Destination: "/sys",
+		Type:        "none",
+		Options:     []string{"rbind", "nosuid", "noexec", "nodev", "ro"},
+	})
+	spec.Mounts = mounts
+
+	// Remove cgroup settings.
+	spec.Linux.Resources = nil
+}

vendor/github.com/opencontainers/runc/libcontainer/specconv/spec_linux.go

@@ -0,0 +1,828 @@
+// +build linux
+
+// Package specconv implements conversion of specifications to libcontainer
+// configurations
+package specconv
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runc/libcontainer/seccomp"
+	libcontainerUtils "github.com/opencontainers/runc/libcontainer/utils"
+	"github.com/opencontainers/runtime-spec/specs-go"
+
+	"golang.org/x/sys/unix"
+)
+
+const wildcard = -1
+
+var namespaceMapping = map[specs.LinuxNamespaceType]configs.NamespaceType{
+	specs.PIDNamespace:     configs.NEWPID,
+	specs.NetworkNamespace: configs.NEWNET,
+	specs.MountNamespace:   configs.NEWNS,
+	specs.UserNamespace:    configs.NEWUSER,
+	specs.IPCNamespace:     configs.NEWIPC,
+	specs.UTSNamespace:     configs.NEWUTS,
+}
+
+var mountPropagationMapping = map[string]int{
+	"rprivate": unix.MS_PRIVATE | unix.MS_REC,
+	"private":  unix.MS_PRIVATE,
+	"rslave":   unix.MS_SLAVE | unix.MS_REC,
+	"slave":    unix.MS_SLAVE,
+	"rshared":  unix.MS_SHARED | unix.MS_REC,
+	"shared":   unix.MS_SHARED,
+	"":         0,
+}
+
+var allowedDevices = []*configs.Device{
+	// allow mknod for any device
+	{
+		Type:        'c',
+		Major:       wildcard,
+		Minor:       wildcard,
+		Permissions: "m",
+		Allow:       true,
+	},
+	{
+		Type:        'b',
+		Major:       wildcard,
+		Minor:       wildcard,
+		Permissions: "m",
+		Allow:       true,
+	},
+	{
+		Type:        'c',
+		Path:        "/dev/null",
+		Major:       1,
+		Minor:       3,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Type:        'c',
+		Path:        "/dev/random",
+		Major:       1,
+		Minor:       8,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Type:        'c',
+		Path:        "/dev/full",
+		Major:       1,
+		Minor:       7,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Type:        'c',
+		Path:        "/dev/tty",
+		Major:       5,
+		Minor:       0,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Type:        'c',
+		Path:        "/dev/zero",
+		Major:       1,
+		Minor:       5,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Type:        'c',
+		Path:        "/dev/urandom",
+		Major:       1,
+		Minor:       9,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Path:        "/dev/console",
+		Type:        'c',
+		Major:       5,
+		Minor:       1,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	// /dev/pts/ - pts namespaces are "coming soon"
+	{
+		Path:        "",
+		Type:        'c',
+		Major:       136,
+		Minor:       wildcard,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	{
+		Path:        "",
+		Type:        'c',
+		Major:       5,
+		Minor:       2,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+	// tuntap
+	{
+		Path:        "",
+		Type:        'c',
+		Major:       10,
+		Minor:       200,
+		Permissions: "rwm",
+		Allow:       true,
+	},
+}
+
+type CreateOpts struct {
+	CgroupName       string
+	UseSystemdCgroup bool
+	NoPivotRoot      bool
+	NoNewKeyring     bool
+	Spec             *specs.Spec
+	Rootless         bool
+}
+
+// CreateLibcontainerConfig creates a new libcontainer configuration from a
+// given specification and a cgroup name
+func CreateLibcontainerConfig(opts *CreateOpts) (*configs.Config, error) {
+	// runc's cwd will always be the bundle path
+	rcwd, err := os.Getwd()
+	if err != nil {
+		return nil, err
+	}
+	cwd, err := filepath.Abs(rcwd)
+	if err != nil {
+		return nil, err
+	}
+	spec := opts.Spec
+	if spec.Root == nil {
+		return nil, fmt.Errorf("Root must be specified")
+	}
+	rootfsPath := spec.Root.Path
+	if !filepath.IsAbs(rootfsPath) {
+		rootfsPath = filepath.Join(cwd, rootfsPath)
+	}
+	labels := []string{}
+	for k, v := range spec.Annotations {
+		labels = append(labels, fmt.Sprintf("%s=%s", k, v))
+	}
+	config := &configs.Config{
+		Rootfs:       rootfsPath,
+		NoPivotRoot:  opts.NoPivotRoot,
+		Readonlyfs:   spec.Root.Readonly,
+		Hostname:     spec.Hostname,
+		Labels:       append(labels, fmt.Sprintf("bundle=%s", cwd)),
+		NoNewKeyring: opts.NoNewKeyring,
+		Rootless:     opts.Rootless,
+	}
+
+	exists := false
+	for _, m := range spec.Mounts {
+		config.Mounts = append(config.Mounts, createLibcontainerMount(cwd, m))
+	}
+	if err := createDevices(spec, config); err != nil {
+		return nil, err
+	}
+	if err := setupUserNamespace(spec, config); err != nil {
+		return nil, err
+	}
+	c, err := createCgroupConfig(opts)
+	if err != nil {
+		return nil, err
+	}
+	config.Cgroups = c
+	// set linux-specific config
+	if spec.Linux != nil {
+		if config.RootPropagation, exists = mountPropagationMapping[spec.Linux.RootfsPropagation]; !exists {
+			return nil, fmt.Errorf("rootfsPropagation=%v is not supported", spec.Linux.RootfsPropagation)
+		}
+
+		for _, ns := range spec.Linux.Namespaces {
+			t, exists := namespaceMapping[ns.Type]
+			if !exists {
+				return nil, fmt.Errorf("namespace %q does not exist", ns)
+			}
+			if config.Namespaces.Contains(t) {
+				return nil, fmt.Errorf("malformed spec file: duplicated ns %q", ns)
+			}
+			config.Namespaces.Add(t, ns.Path)
+		}
+		if config.Namespaces.Contains(configs.NEWNET) {
+			config.Networks = []*configs.Network{
+				{
+					Type: "loopback",
+				},
+			}
+		}
+		config.MaskPaths = spec.Linux.MaskedPaths
+		config.ReadonlyPaths = spec.Linux.ReadonlyPaths
+		config.MountLabel = spec.Linux.MountLabel
+		config.Sysctl = spec.Linux.Sysctl
+		if spec.Linux.Seccomp != nil {
+			seccomp, err := setupSeccomp(spec.Linux.Seccomp)
+			if err != nil {
+				return nil, err
+			}
+			config.Seccomp = seccomp
+		}
+	}
+	if spec.Process.SelinuxLabel != "" {
+		config.ProcessLabel = spec.Process.SelinuxLabel
+	}
+	if spec.Process != nil && spec.Process.OOMScoreAdj != nil {
+		config.OomScoreAdj = *spec.Process.OOMScoreAdj
+	}
+	if spec.Process.Capabilities != nil {
+		config.Capabilities = &configs.Capabilities{
+			Bounding:    spec.Process.Capabilities.Bounding,
+			Effective:   spec.Process.Capabilities.Effective,
+			Permitted:   spec.Process.Capabilities.Permitted,
+			Inheritable: spec.Process.Capabilities.Inheritable,
+			Ambient:     spec.Process.Capabilities.Ambient,
+		}
+	}
+	createHooks(spec, config)
+	config.Version = specs.Version
+	if spec.Linux.IntelRdt != nil {
+		config.IntelRdt = &configs.IntelRdt{}
+		if spec.Linux.IntelRdt.L3CacheSchema != "" {
+			config.IntelRdt.L3CacheSchema = spec.Linux.IntelRdt.L3CacheSchema
+		}
+	}
+	return config, nil
+}
+
+func createLibcontainerMount(cwd string, m specs.Mount) *configs.Mount {
+	flags, pgflags, data, ext := parseMountOptions(m.Options)
+	source := m.Source
+	if m.Type == "bind" {
+		if !filepath.IsAbs(source) {
+			source = filepath.Join(cwd, m.Source)
+		}
+	}
+	return &configs.Mount{
+		Device:           m.Type,
+		Source:           source,
+		Destination:      m.Destination,
+		Data:             data,
+		Flags:            flags,
+		PropagationFlags: pgflags,
+		Extensions:       ext,
+	}
+}
+
+func createCgroupConfig(opts *CreateOpts) (*configs.Cgroup, error) {
+	var (
+		myCgroupPath string
+
+		spec             = opts.Spec
+		useSystemdCgroup = opts.UseSystemdCgroup
+		name             = opts.CgroupName
+	)
+
+	c := &configs.Cgroup{
+		Resources: &configs.Resources{},
+	}
+
+	if spec.Linux != nil && spec.Linux.CgroupsPath != "" {
+		myCgroupPath = libcontainerUtils.CleanPath(spec.Linux.CgroupsPath)
+		if useSystemdCgroup {
+			myCgroupPath = spec.Linux.CgroupsPath
+		}
+	}
+
+	if useSystemdCgroup {
+		if myCgroupPath == "" {
+			c.Parent = "system.slice"
+			c.ScopePrefix = "runc"
+			c.Name = name
+		} else {
+			// Parse the path from expected "slice:prefix:name"
+			// for e.g. "system.slice:docker:1234"
+			parts := strings.Split(myCgroupPath, ":")
+			if len(parts) != 3 {
+				return nil, fmt.Errorf("expected cgroupsPath to be of format \"slice:prefix:name\" for systemd cgroups")
+			}
+			c.Parent = parts[0]
+			c.ScopePrefix = parts[1]
+			c.Name = parts[2]
+		}
+	} else {
+		if myCgroupPath == "" {
+			c.Name = name
+		}
+		c.Path = myCgroupPath
+	}
+
+	// In rootless containers, any attempt to make cgroup changes will fail.
+	// libcontainer will validate this and we shouldn't add any cgroup options
+	// the user didn't specify.
+	if !opts.Rootless {
+		c.Resources.AllowedDevices = allowedDevices
+	}
+	if spec.Linux != nil {
+		r := spec.Linux.Resources
+		if r == nil {
+			return c, nil
+		}
+		for i, d := range spec.Linux.Resources.Devices {
+			var (
+				t     = "a"
+				major = int64(-1)
+				minor = int64(-1)
+			)
+			if d.Type != "" {
+				t = d.Type
+			}
+			if d.Major != nil {
+				major = *d.Major
+			}
+			if d.Minor != nil {
+				minor = *d.Minor
+			}
+			if d.Access == "" {
+				return nil, fmt.Errorf("device access at %d field cannot be empty", i)
+			}
+			dt, err := stringToCgroupDeviceRune(t)
+			if err != nil {
+				return nil, err
+			}
+			dd := &configs.Device{
+				Type:        dt,
+				Major:       major,
+				Minor:       minor,
+				Permissions: d.Access,
+				Allow:       d.Allow,
+			}
+			c.Resources.Devices = append(c.Resources.Devices, dd)
+		}
+		if r.Memory != nil {
+			if r.Memory.Limit != nil {
+				c.Resources.Memory = *r.Memory.Limit
+			}
+			if r.Memory.Reservation != nil {
+				c.Resources.MemoryReservation = *r.Memory.Reservation
+			}
+			if r.Memory.Swap != nil {
+				c.Resources.MemorySwap = *r.Memory.Swap
+			}
+			if r.Memory.Kernel != nil {
+				c.Resources.KernelMemory = *r.Memory.Kernel
+			}
+			if r.Memory.KernelTCP != nil {
+				c.Resources.KernelMemoryTCP = *r.Memory.KernelTCP
+			}
+			if r.Memory.Swappiness != nil {
+				c.Resources.MemorySwappiness = r.Memory.Swappiness
+			}
+			if r.Memory.DisableOOMKiller != nil {
+				c.Resources.OomKillDisable = *r.Memory.DisableOOMKiller
+			}
+		}
+		if r.CPU != nil {
+			if r.CPU.Shares != nil {
+				c.Resources.CpuShares = *r.CPU.Shares
+			}
+			if r.CPU.Quota != nil {
+				c.Resources.CpuQuota = *r.CPU.Quota
+			}
+			if r.CPU.Period != nil {
+				c.Resources.CpuPeriod = *r.CPU.Period
+			}
+			if r.CPU.RealtimeRuntime != nil {
+				c.Resources.CpuRtRuntime = *r.CPU.RealtimeRuntime
+			}
+			if r.CPU.RealtimePeriod != nil {
+				c.Resources.CpuRtPeriod = *r.CPU.RealtimePeriod
+			}
+			if r.CPU.Cpus != "" {
+				c.Resources.CpusetCpus = r.CPU.Cpus
+			}
+			if r.CPU.Mems != "" {
+				c.Resources.CpusetMems = r.CPU.Mems
+			}
+		}
+		if r.Pids != nil {
+			c.Resources.PidsLimit = r.Pids.Limit
+		}
+		if r.BlockIO != nil {
+			if r.BlockIO.Weight != nil {
+				c.Resources.BlkioWeight = *r.BlockIO.Weight
+			}
+			if r.BlockIO.LeafWeight != nil {
+				c.Resources.BlkioLeafWeight = *r.BlockIO.LeafWeight
+			}
+			if r.BlockIO.WeightDevice != nil {
+				for _, wd := range r.BlockIO.WeightDevice {
+					var weight, leafWeight uint16
+					if wd.Weight != nil {
+						weight = *wd.Weight
+					}
+					if wd.LeafWeight != nil {
+						leafWeight = *wd.LeafWeight
+					}
+					weightDevice := configs.NewWeightDevice(wd.Major, wd.Minor, weight, leafWeight)
+					c.Resources.BlkioWeightDevice = append(c.Resources.BlkioWeightDevice, weightDevice)
+				}
+			}
+			if r.BlockIO.ThrottleReadBpsDevice != nil {
+				for _, td := range r.BlockIO.ThrottleReadBpsDevice {
+					rate := td.Rate
+					throttleDevice := configs.NewThrottleDevice(td.Major, td.Minor, rate)
+					c.Resources.BlkioThrottleReadBpsDevice = append(c.Resources.BlkioThrottleReadBpsDevice, throttleDevice)
+				}
+			}
+			if r.BlockIO.ThrottleWriteBpsDevice != nil {
+				for _, td := range r.BlockIO.ThrottleWriteBpsDevice {
+					rate := td.Rate
+					throttleDevice := configs.NewThrottleDevice(td.Major, td.Minor, rate)
+					c.Resources.BlkioThrottleWriteBpsDevice = append(c.Resources.BlkioThrottleWriteBpsDevice, throttleDevice)
+				}
+			}
+			if r.BlockIO.ThrottleReadIOPSDevice != nil {
+				for _, td := range r.BlockIO.ThrottleReadIOPSDevice {
+					rate := td.Rate
+					throttleDevice := configs.NewThrottleDevice(td.Major, td.Minor, rate)
+					c.Resources.BlkioThrottleReadIOPSDevice = append(c.Resources.BlkioThrottleReadIOPSDevice, throttleDevice)
+				}
+			}
+			if r.BlockIO.ThrottleWriteIOPSDevice != nil {
+				for _, td := range r.BlockIO.ThrottleWriteIOPSDevice {
+					rate := td.Rate
+					throttleDevice := configs.NewThrottleDevice(td.Major, td.Minor, rate)
+					c.Resources.BlkioThrottleWriteIOPSDevice = append(c.Resources.BlkioThrottleWriteIOPSDevice, throttleDevice)
+				}
+			}
+		}
+		for _, l := range r.HugepageLimits {
+			c.Resources.HugetlbLimit = append(c.Resources.HugetlbLimit, &configs.HugepageLimit{
+				Pagesize: l.Pagesize,
+				Limit:    l.Limit,
+			})
+		}
+		if r.Network != nil {
+			if r.Network.ClassID != nil {
+				c.Resources.NetClsClassid = *r.Network.ClassID
+			}
+			for _, m := range r.Network.Priorities {
+				c.Resources.NetPrioIfpriomap = append(c.Resources.NetPrioIfpriomap, &configs.IfPrioMap{
+					Interface: m.Name,
+					Priority:  int64(m.Priority),
+				})
+			}
+		}
+	}
+	if !opts.Rootless {
+		// append the default allowed devices to the end of the list
+		c.Resources.Devices = append(c.Resources.Devices, allowedDevices...)
+	}
+	return c, nil
+}
+
+func stringToCgroupDeviceRune(s string) (rune, error) {
+	switch s {
+	case "a":
+		return 'a', nil
+	case "b":
+		return 'b', nil
+	case "c":
+		return 'c', nil
+	default:
+		return 0, fmt.Errorf("invalid cgroup device type %q", s)
+	}
+}
+
+func stringToDeviceRune(s string) (rune, error) {
+	switch s {
+	case "p":
+		return 'p', nil
+	case "u":
+		return 'u', nil
+	case "b":
+		return 'b', nil
+	case "c":
+		return 'c', nil
+	default:
+		return 0, fmt.Errorf("invalid device type %q", s)
+	}
+}
+
+func createDevices(spec *specs.Spec, config *configs.Config) error {
+	// add whitelisted devices
+	config.Devices = []*configs.Device{
+		{
+			Type:     'c',
+			Path:     "/dev/null",
+			Major:    1,
+			Minor:    3,
+			FileMode: 0666,
+			Uid:      0,
+			Gid:      0,
+		},
+		{
+			Type:     'c',
+			Path:     "/dev/random",
+			Major:    1,
+			Minor:    8,
+			FileMode: 0666,
+			Uid:      0,
+			Gid:      0,
+		},
+		{
+			Type:     'c',
+			Path:     "/dev/full",
+			Major:    1,
+			Minor:    7,
+			FileMode: 0666,
+			Uid:      0,
+			Gid:      0,
+		},
+		{
+			Type:     'c',
+			Path:     "/dev/tty",
+			Major:    5,
+			Minor:    0,
+			FileMode: 0666,
+			Uid:      0,
+			Gid:      0,
+		},
+		{
+			Type:     'c',
+			Path:     "/dev/zero",
+			Major:    1,
+			Minor:    5,
+			FileMode: 0666,
+			Uid:      0,
+			Gid:      0,
+		},
+		{
+			Type:     'c',
+			Path:     "/dev/urandom",
+			Major:    1,
+			Minor:    9,
+			FileMode: 0666,
+			Uid:      0,
+			Gid:      0,
+		},
+	}
+	// merge in additional devices from the spec
+	if spec.Linux != nil {
+		for _, d := range spec.Linux.Devices {
+			var uid, gid uint32
+			var filemode os.FileMode = 0666
+
+			if d.UID != nil {
+				uid = *d.UID
+			}
+			if d.GID != nil {
+				gid = *d.GID
+			}
+			dt, err := stringToDeviceRune(d.Type)
+			if err != nil {
+				return err
+			}
+			if d.FileMode != nil {
+				filemode = *d.FileMode
+			}
+			device := &configs.Device{
+				Type:     dt,
+				Path:     d.Path,
+				Major:    d.Major,
+				Minor:    d.Minor,
+				FileMode: filemode,
+				Uid:      uid,
+				Gid:      gid,
+			}
+			config.Devices = append(config.Devices, device)
+		}
+	}
+	return nil
+}
+
+func setupUserNamespace(spec *specs.Spec, config *configs.Config) error {
+	create := func(m specs.LinuxIDMapping) configs.IDMap {
+		return configs.IDMap{
+			HostID:      int(m.HostID),
+			ContainerID: int(m.ContainerID),
+			Size:        int(m.Size),
+		}
+	}
+	if spec.Linux != nil {
+		if len(spec.Linux.UIDMappings) == 0 {
+			return nil
+		}
+		for _, m := range spec.Linux.UIDMappings {
+			config.UidMappings = append(config.UidMappings, create(m))
+		}
+		for _, m := range spec.Linux.GIDMappings {
+			config.GidMappings = append(config.GidMappings, create(m))
+		}
+	}
+	rootUID, err := config.HostRootUID()
+	if err != nil {
+		return err
+	}
+	rootGID, err := config.HostRootGID()
+	if err != nil {
+		return err
+	}
+	for _, node := range config.Devices {
+		node.Uid = uint32(rootUID)
+		node.Gid = uint32(rootGID)
+	}
+	return nil
+}
+
+// parseMountOptions parses the string and returns the flags, propagation
+// flags and any mount data that it contains.
+func parseMountOptions(options []string) (int, []int, string, int) {
+	var (
+		flag     int
+		pgflag   []int
+		data     []string
+		extFlags int
+	)
+	flags := map[string]struct {
+		clear bool
+		flag  int
+	}{
+		"acl":           {false, unix.MS_POSIXACL},
+		"async":         {true, unix.MS_SYNCHRONOUS},
+		"atime":         {true, unix.MS_NOATIME},
+		"bind":          {false, unix.MS_BIND},
+		"defaults":      {false, 0},
+		"dev":           {true, unix.MS_NODEV},
+		"diratime":      {true, unix.MS_NODIRATIME},
+		"dirsync":       {false, unix.MS_DIRSYNC},
+		"exec":          {true, unix.MS_NOEXEC},
+		"iversion":      {false, unix.MS_I_VERSION},
+		"lazytime":      {false, unix.MS_LAZYTIME},
+		"loud":          {true, unix.MS_SILENT},
+		"mand":          {false, unix.MS_MANDLOCK},
+		"noacl":         {true, unix.MS_POSIXACL},
+		"noatime":       {false, unix.MS_NOATIME},
+		"nodev":         {false, unix.MS_NODEV},
+		"nodiratime":    {false, unix.MS_NODIRATIME},
+		"noexec":        {false, unix.MS_NOEXEC},
+		"noiversion":    {true, unix.MS_I_VERSION},
+		"nolazytime":    {true, unix.MS_LAZYTIME},
+		"nomand":        {true, unix.MS_MANDLOCK},
+		"norelatime":    {true, unix.MS_RELATIME},
+		"nostrictatime": {true, unix.MS_STRICTATIME},
+		"nosuid":        {false, unix.MS_NOSUID},
+		"rbind":         {false, unix.MS_BIND | unix.MS_REC},
+		"relatime":      {false, unix.MS_RELATIME},
+		"remount":       {false, unix.MS_REMOUNT},
+		"ro":            {false, unix.MS_RDONLY},
+		"rw":            {true, unix.MS_RDONLY},
+		"silent":        {false, unix.MS_SILENT},
+		"strictatime":   {false, unix.MS_STRICTATIME},
+		"suid":          {true, unix.MS_NOSUID},
+		"sync":          {false, unix.MS_SYNCHRONOUS},
+	}
+	propagationFlags := map[string]int{
+		"private":     unix.MS_PRIVATE,
+		"shared":      unix.MS_SHARED,
+		"slave":       unix.MS_SLAVE,
+		"unbindable":  unix.MS_UNBINDABLE,
+		"rprivate":    unix.MS_PRIVATE | unix.MS_REC,
+		"rshared":     unix.MS_SHARED | unix.MS_REC,
+		"rslave":      unix.MS_SLAVE | unix.MS_REC,
+		"runbindable": unix.MS_UNBINDABLE | unix.MS_REC,
+	}
+	extensionFlags := map[string]struct {
+		clear bool
+		flag  int
+	}{
+		"tmpcopyup": {false, configs.EXT_COPYUP},
+	}
+	for _, o := range options {
+		// If the option does not exist in the flags table or the flag
+		// is not supported on the platform,
+		// then it is a data value for a specific fs type
+		if f, exists := flags[o]; exists && f.flag != 0 {
+			if f.clear {
+				flag &= ^f.flag
+			} else {
+				flag |= f.flag
+			}
+		} else if f, exists := propagationFlags[o]; exists && f != 0 {
+			pgflag = append(pgflag, f)
+		} else if f, exists := extensionFlags[o]; exists && f.flag != 0 {
+			if f.clear {
+				extFlags &= ^f.flag
+			} else {
+				extFlags |= f.flag
+			}
+		} else {
+			data = append(data, o)
+		}
+	}
+	return flag, pgflag, strings.Join(data, ","), extFlags
+}
+
+func setupSeccomp(config *specs.LinuxSeccomp) (*configs.Seccomp, error) {
+	if config == nil {
+		return nil, nil
+	}
+
+	// No default action specified, no syscalls listed, assume seccomp disabled
+	if config.DefaultAction == "" && len(config.Syscalls) == 0 {
+		return nil, nil
+	}
+
+	newConfig := new(configs.Seccomp)
+	newConfig.Syscalls = []*configs.Syscall{}
+
+	if len(config.Architectures) > 0 {
+		newConfig.Architectures = []string{}
+		for _, arch := range config.Architectures {
+			newArch, err := seccomp.ConvertStringToArch(string(arch))
+			if err != nil {
+				return nil, err
+			}
+			newConfig.Architectures = append(newConfig.Architectures, newArch)
+		}
+	}
+
+	// Convert default action from string representation
+	newDefaultAction, err := seccomp.ConvertStringToAction(string(config.DefaultAction))
+	if err != nil {
+		return nil, err
+	}
+	newConfig.DefaultAction = newDefaultAction
+
+	// Loop through all syscall blocks and convert them to libcontainer format
+	for _, call := range config.Syscalls {
+		newAction, err := seccomp.ConvertStringToAction(string(call.Action))
+		if err != nil {
+			return nil, err
+		}
+
+		for _, name := range call.Names {
+			newCall := configs.Syscall{
+				Name:   name,
+				Action: newAction,
+				Args:   []*configs.Arg{},
+			}
+			// Loop through all the arguments of the syscall and convert them
+			for _, arg := range call.Args {
+				newOp, err := seccomp.ConvertStringToOperator(string(arg.Op))
+				if err != nil {
+					return nil, err
+				}
+
+				newArg := configs.Arg{
+					Index:    arg.Index,
+					Value:    arg.Value,
+					ValueTwo: arg.ValueTwo,
+					Op:       newOp,
+				}
+
+				newCall.Args = append(newCall.Args, &newArg)
+			}
+			newConfig.Syscalls = append(newConfig.Syscalls, &newCall)
+		}
+	}
+
+	return newConfig, nil
+}
+
+func createHooks(rspec *specs.Spec, config *configs.Config) {
+	config.Hooks = &configs.Hooks{}
+	if rspec.Hooks != nil {
+
+		for _, h := range rspec.Hooks.Prestart {
+			cmd := createCommandHook(h)
+			config.Hooks.Prestart = append(config.Hooks.Prestart, configs.NewCommandHook(cmd))
+		}
+		for _, h := range rspec.Hooks.Poststart {
+			cmd := createCommandHook(h)
+			config.Hooks.Poststart = append(config.Hooks.Poststart, configs.NewCommandHook(cmd))
+		}
+		for _, h := range rspec.Hooks.Poststop {
+			cmd := createCommandHook(h)
+			config.Hooks.Poststop = append(config.Hooks.Poststop, configs.NewCommandHook(cmd))
+		}
+	}
+}
+
+func createCommandHook(h specs.Hook) configs.Command {
+	cmd := configs.Command{
+		Path: h.Path,
+		Args: h.Args,
+		Env:  h.Env,
+	}
+	if h.Timeout != nil {
+		d := time.Duration(*h.Timeout) * time.Second
+		cmd.Timeout = &d
+	}
+	return cmd
+}

vendor/github.com/seccomp/libseccomp-golang/LICENSE

@@ -0,0 +1,22 @@
+Copyright (c) 2015 Matthew Heon <mheon@redhat.com>
+Copyright (c) 2015 Paul Moore <pmoore@redhat.com>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/seccomp/libseccomp-golang/seccomp.go

@@ -0,0 +1,902 @@
+// +build linux
+
+// Public API specification for libseccomp Go bindings
+// Contains public API for the bindings
+
+// Package seccomp provides bindings for libseccomp, a library wrapping the Linux
+// seccomp syscall. Seccomp enables an application to restrict system call use
+// for itself and its children.
+package seccomp
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"strings"
+	"sync"
+	"syscall"
+	"unsafe"
+)
+
+// C wrapping code
+
+// #cgo pkg-config: libseccomp
+// #include <stdlib.h>
+// #include <seccomp.h>
+import "C"
+
+// Exported types
+
+// VersionError denotes that the system libseccomp version is incompatible
+// with this package.
+type VersionError struct {
+	message string
+	minimum string
+}
+
+func (e VersionError) Error() string {
+	format := "Libseccomp version too low: "
+	if e.message != "" {
+		format += e.message + ": "
+	}
+	format += "minimum supported is "
+	if e.minimum != "" {
+		format += e.minimum + ": "
+	} else {
+		format += "2.1.0: "
+	}
+	format += "detected %d.%d.%d"
+	return fmt.Sprintf(format, verMajor, verMinor, verMicro)
+}
+
+// ScmpArch represents a CPU architecture. Seccomp can restrict syscalls on a
+// per-architecture basis.
+type ScmpArch uint
+
+// ScmpAction represents an action to be taken on a filter rule match in
+// libseccomp
+type ScmpAction uint
+
+// ScmpCompareOp represents a comparison operator which can be used in a filter
+// rule
+type ScmpCompareOp uint
+
+// ScmpCondition represents a rule in a libseccomp filter context
+type ScmpCondition struct {
+	Argument uint          `json:"argument,omitempty"`
+	Op       ScmpCompareOp `json:"operator,omitempty"`
+	Operand1 uint64        `json:"operand_one,omitempty"`
+	Operand2 uint64        `json:"operand_two,omitempty"`
+}
+
+// ScmpSyscall represents a Linux System Call
+type ScmpSyscall int32
+
+// Exported Constants
+
+const (
+	// Valid architectures recognized by libseccomp
+	// ARM64 and all MIPS architectures are unsupported by versions of the
+	// library before v2.2 and will return errors if used
+
+	// ArchInvalid is a placeholder to ensure uninitialized ScmpArch
+	// variables are invalid
+	ArchInvalid ScmpArch = iota
+	// ArchNative is the native architecture of the kernel
+	ArchNative ScmpArch = iota
+	// ArchX86 represents 32-bit x86 syscalls
+	ArchX86 ScmpArch = iota
+	// ArchAMD64 represents 64-bit x86-64 syscalls
+	ArchAMD64 ScmpArch = iota
+	// ArchX32 represents 64-bit x86-64 syscalls (32-bit pointers)
+	ArchX32 ScmpArch = iota
+	// ArchARM represents 32-bit ARM syscalls
+	ArchARM ScmpArch = iota
+	// ArchARM64 represents 64-bit ARM syscalls
+	ArchARM64 ScmpArch = iota
+	// ArchMIPS represents 32-bit MIPS syscalls
+	ArchMIPS ScmpArch = iota
+	// ArchMIPS64 represents 64-bit MIPS syscalls
+	ArchMIPS64 ScmpArch = iota
+	// ArchMIPS64N32 represents 64-bit MIPS syscalls (32-bit pointers)
+	ArchMIPS64N32 ScmpArch = iota
+	// ArchMIPSEL represents 32-bit MIPS syscalls (little endian)
+	ArchMIPSEL ScmpArch = iota
+	// ArchMIPSEL64 represents 64-bit MIPS syscalls (little endian)
+	ArchMIPSEL64 ScmpArch = iota
+	// ArchMIPSEL64N32 represents 64-bit MIPS syscalls (little endian,
+	// 32-bit pointers)
+	ArchMIPSEL64N32 ScmpArch = iota
+	// ArchPPC represents 32-bit POWERPC syscalls
+	ArchPPC ScmpArch = iota
+	// ArchPPC64 represents 64-bit POWER syscalls (big endian)
+	ArchPPC64 ScmpArch = iota
+	// ArchPPC64LE represents 64-bit POWER syscalls (little endian)
+	ArchPPC64LE ScmpArch = iota
+	// ArchS390 represents 31-bit System z/390 syscalls
+	ArchS390 ScmpArch = iota
+	// ArchS390X represents 64-bit System z/390 syscalls
+	ArchS390X ScmpArch = iota
+)
+
+const (
+	// Supported actions on filter match
+
+	// ActInvalid is a placeholder to ensure uninitialized ScmpAction
+	// variables are invalid
+	ActInvalid ScmpAction = iota
+	// ActKill kills the process
+	ActKill ScmpAction = iota
+	// ActTrap throws SIGSYS
+	ActTrap ScmpAction = iota
+	// ActErrno causes the syscall to return a negative error code. This
+	// code can be set with the SetReturnCode method
+	ActErrno ScmpAction = iota
+	// ActTrace causes the syscall to notify tracing processes with the
+	// given error code. This code can be set with the SetReturnCode method
+	ActTrace ScmpAction = iota
+	// ActAllow permits the syscall to continue execution
+	ActAllow ScmpAction = iota
+)
+
+const (
+	// These are comparison operators used in conditional seccomp rules
+	// They are used to compare the value of a single argument of a syscall
+	// against a user-defined constant
+
+	// CompareInvalid is a placeholder to ensure uninitialized ScmpCompareOp
+	// variables are invalid
+	CompareInvalid ScmpCompareOp = iota
+	// CompareNotEqual returns true if the argument is not equal to the
+	// given value
+	CompareNotEqual ScmpCompareOp = iota
+	// CompareLess returns true if the argument is less than the given value
+	CompareLess ScmpCompareOp = iota
+	// CompareLessOrEqual returns true if the argument is less than or equal
+	// to the given value
+	CompareLessOrEqual ScmpCompareOp = iota
+	// CompareEqual returns true if the argument is equal to the given value
+	CompareEqual ScmpCompareOp = iota
+	// CompareGreaterEqual returns true if the argument is greater than or
+	// equal to the given value
+	CompareGreaterEqual ScmpCompareOp = iota
+	// CompareGreater returns true if the argument is greater than the given
+	// value
+	CompareGreater ScmpCompareOp = iota
+	// CompareMaskedEqual returns true if the argument is equal to the given
+	// value, when masked (bitwise &) against the second given value
+	CompareMaskedEqual ScmpCompareOp = iota
+)
+
+// Helpers for types
+
+// GetArchFromString returns an ScmpArch constant from a string representing an
+// architecture
+func GetArchFromString(arch string) (ScmpArch, error) {
+	if err := ensureSupportedVersion(); err != nil {
+		return ArchInvalid, err
+	}
+
+	switch strings.ToLower(arch) {
+	case "x86":
+		return ArchX86, nil
+	case "amd64", "x86-64", "x86_64", "x64":
+		return ArchAMD64, nil
+	case "x32":
+		return ArchX32, nil
+	case "arm":
+		return ArchARM, nil
+	case "arm64", "aarch64":
+		return ArchARM64, nil
+	case "mips":
+		return ArchMIPS, nil
+	case "mips64":
+		return ArchMIPS64, nil
+	case "mips64n32":
+		return ArchMIPS64N32, nil
+	case "mipsel":
+		return ArchMIPSEL, nil
+	case "mipsel64":
+		return ArchMIPSEL64, nil
+	case "mipsel64n32":
+		return ArchMIPSEL64N32, nil
+	case "ppc":
+		return ArchPPC, nil
+	case "ppc64":
+		return ArchPPC64, nil
+	case "ppc64le":
+		return ArchPPC64LE, nil
+	case "s390":
+		return ArchS390, nil
+	case "s390x":
+		return ArchS390X, nil
+	default:
+		return ArchInvalid, fmt.Errorf("cannot convert unrecognized string %s", arch)
+	}
+}
+
+// String returns a string representation of an architecture constant
+func (a ScmpArch) String() string {
+	switch a {
+	case ArchX86:
+		return "x86"
+	case ArchAMD64:
+		return "amd64"
+	case ArchX32:
+		return "x32"
+	case ArchARM:
+		return "arm"
+	case ArchARM64:
+		return "arm64"
+	case ArchMIPS:
+		return "mips"
+	case ArchMIPS64:
+		return "mips64"
+	case ArchMIPS64N32:
+		return "mips64n32"
+	case ArchMIPSEL:
+		return "mipsel"
+	case ArchMIPSEL64:
+		return "mipsel64"
+	case ArchMIPSEL64N32:
+		return "mipsel64n32"
+	case ArchPPC:
+		return "ppc"
+	case ArchPPC64:
+		return "ppc64"
+	case ArchPPC64LE:
+		return "ppc64le"
+	case ArchS390:
+		return "s390"
+	case ArchS390X:
+		return "s390x"
+	case ArchNative:
+		return "native"
+	case ArchInvalid:
+		return "Invalid architecture"
+	default:
+		return "Unknown architecture"
+	}
+}
+
+// String returns a string representation of a comparison operator constant
+func (a ScmpCompareOp) String() string {
+	switch a {
+	case CompareNotEqual:
+		return "Not equal"
+	case CompareLess:
+		return "Less than"
+	case CompareLessOrEqual:
+		return "Less than or equal to"
+	case CompareEqual:
+		return "Equal"
+	case CompareGreaterEqual:
+		return "Greater than or equal to"
+	case CompareGreater:
+		return "Greater than"
+	case CompareMaskedEqual:
+		return "Masked equality"
+	case CompareInvalid:
+		return "Invalid comparison operator"
+	default:
+		return "Unrecognized comparison operator"
+	}
+}
+
+// String returns a string representation of a seccomp match action
+func (a ScmpAction) String() string {
+	switch a & 0xFFFF {
+	case ActKill:
+		return "Action: Kill Process"
+	case ActTrap:
+		return "Action: Send SIGSYS"
+	case ActErrno:
+		return fmt.Sprintf("Action: Return error code %d", (a >> 16))
+	case ActTrace:
+		return fmt.Sprintf("Action: Notify tracing processes with code %d",
+			(a >> 16))
+	case ActAllow:
+		return "Action: Allow system call"
+	default:
+		return "Unrecognized Action"
+	}
+}
+
+// SetReturnCode adds a return code to a supporting ScmpAction, clearing any
+// existing code Only valid on ActErrno and ActTrace. Takes no action otherwise.
+// Accepts 16-bit return code as argument.
+// Returns a valid ScmpAction of the original type with the new error code set.
+func (a ScmpAction) SetReturnCode(code int16) ScmpAction {
+	aTmp := a & 0x0000FFFF
+	if aTmp == ActErrno || aTmp == ActTrace {
+		return (aTmp | (ScmpAction(code)&0xFFFF)<<16)
+	}
+	return a
+}
+
+// GetReturnCode returns the return code of an ScmpAction
+func (a ScmpAction) GetReturnCode() int16 {
+	return int16(a >> 16)
+}
+
+// General utility functions
+
+// GetLibraryVersion returns the version of the library the bindings are built
+// against.
+// The version is formatted as follows: Major.Minor.Micro
+func GetLibraryVersion() (major, minor, micro int) {
+	return verMajor, verMinor, verMicro
+}
+
+// Syscall functions
+
+// GetName retrieves the name of a syscall from its number.
+// Acts on any syscall number.
+// Returns either a string containing the name of the syscall, or an error.
+func (s ScmpSyscall) GetName() (string, error) {
+	return s.GetNameByArch(ArchNative)
+}
+
+// GetNameByArch retrieves the name of a syscall from its number for a given
+// architecture.
+// Acts on any syscall number.
+// Accepts a valid architecture constant.
+// Returns either a string containing the name of the syscall, or an error.
+// if the syscall is unrecognized or an issue occurred.
+func (s ScmpSyscall) GetNameByArch(arch ScmpArch) (string, error) {
+	if err := sanitizeArch(arch); err != nil {
+		return "", err
+	}
+
+	cString := C.seccomp_syscall_resolve_num_arch(arch.toNative(), C.int(s))
+	if cString == nil {
+		return "", fmt.Errorf("could not resolve syscall name")
+	}
+	defer C.free(unsafe.Pointer(cString))
+
+	finalStr := C.GoString(cString)
+	return finalStr, nil
+}
+
+// GetSyscallFromName returns the number of a syscall by name on the kernel's
+// native architecture.
+// Accepts a string containing the name of a syscall.
+// Returns the number of the syscall, or an error if no syscall with that name
+// was found.
+func GetSyscallFromName(name string) (ScmpSyscall, error) {
+	if err := ensureSupportedVersion(); err != nil {
+		return 0, err
+	}
+
+	cString := C.CString(name)
+	defer C.free(unsafe.Pointer(cString))
+
+	result := C.seccomp_syscall_resolve_name(cString)
+	if result == scmpError {
+		return 0, fmt.Errorf("could not resolve name to syscall")
+	}
+
+	return ScmpSyscall(result), nil
+}
+
+// GetSyscallFromNameByArch returns the number of a syscall by name for a given
+// architecture's ABI.
+// Accepts the name of a syscall and an architecture constant.
+// Returns the number of the syscall, or an error if an invalid architecture is
+// passed or a syscall with that name was not found.
+func GetSyscallFromNameByArch(name string, arch ScmpArch) (ScmpSyscall, error) {
+	if err := ensureSupportedVersion(); err != nil {
+		return 0, err
+	}
+	if err := sanitizeArch(arch); err != nil {
+		return 0, err
+	}
+
+	cString := C.CString(name)
+	defer C.free(unsafe.Pointer(cString))
+
+	result := C.seccomp_syscall_resolve_name_arch(arch.toNative(), cString)
+	if result == scmpError {
+		return 0, fmt.Errorf("could not resolve name to syscall")
+	}
+
+	return ScmpSyscall(result), nil
+}
+
+// MakeCondition creates and returns a new condition to attach to a filter rule.
+// Associated rules will only match if this condition is true.
+// Accepts the number the argument we are checking, and a comparison operator
+// and value to compare to.
+// The rule will match if argument $arg (zero-indexed) of the syscall is
+// $COMPARE_OP the provided comparison value.
+// Some comparison operators accept two values. Masked equals, for example,
+// will mask $arg of the syscall with the second value provided (via bitwise
+// AND) and then compare against the first value provided.
+// For example, in the less than or equal case, if the syscall argument was
+// 0 and the value provided was 1, the condition would match, as 0 is less
+// than or equal to 1.
+// Return either an error on bad argument or a valid ScmpCondition struct.
+func MakeCondition(arg uint, comparison ScmpCompareOp, values ...uint64) (ScmpCondition, error) {
+	var condStruct ScmpCondition
+
+	if err := ensureSupportedVersion(); err != nil {
+		return condStruct, err
+	}
+
+	if comparison == CompareInvalid {
+		return condStruct, fmt.Errorf("invalid comparison operator")
+	} else if arg > 5 {
+		return condStruct, fmt.Errorf("syscalls only have up to 6 arguments")
+	} else if len(values) > 2 {
+		return condStruct, fmt.Errorf("conditions can have at most 2 arguments")
+	} else if len(values) == 0 {
+		return condStruct, fmt.Errorf("must provide at least one value to compare against")
+	}
+
+	condStruct.Argument = arg
+	condStruct.Op = comparison
+	condStruct.Operand1 = values[0]
+	if len(values) == 2 {
+		condStruct.Operand2 = values[1]
+	} else {
+		condStruct.Operand2 = 0 // Unused
+	}
+
+	return condStruct, nil
+}
+
+// Utility Functions
+
+// GetNativeArch returns architecture token representing the native kernel
+// architecture
+func GetNativeArch() (ScmpArch, error) {
+	if err := ensureSupportedVersion(); err != nil {
+		return ArchInvalid, err
+	}
+
+	arch := C.seccomp_arch_native()
+
+	return archFromNative(arch)
+}
+
+// Public Filter API
+
+// ScmpFilter represents a filter context in libseccomp.
+// A filter context is initially empty. Rules can be added to it, and it can
+// then be loaded into the kernel.
+type ScmpFilter struct {
+	filterCtx C.scmp_filter_ctx
+	valid     bool
+	lock      sync.Mutex
+}
+
+// NewFilter creates and returns a new filter context.
+// Accepts a default action to be taken for syscalls which match no rules in
+// the filter.
+// Returns a reference to a valid filter context, or nil and an error if the
+// filter context could not be created or an invalid default action was given.
+func NewFilter(defaultAction ScmpAction) (*ScmpFilter, error) {
+	if err := ensureSupportedVersion(); err != nil {
+		return nil, err
+	}
+
+	if err := sanitizeAction(defaultAction); err != nil {
+		return nil, err
+	}
+
+	fPtr := C.seccomp_init(defaultAction.toNative())
+	if fPtr == nil {
+		return nil, fmt.Errorf("could not create filter")
+	}
+
+	filter := new(ScmpFilter)
+	filter.filterCtx = fPtr
+	filter.valid = true
+	runtime.SetFinalizer(filter, filterFinalizer)
+
+	return filter, nil
+}
+
+// IsValid determines whether a filter context is valid to use.
+// Some operations (Release and Merge) render filter contexts invalid and
+// consequently prevent further use.
+func (f *ScmpFilter) IsValid() bool {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	return f.valid
+}
+
+// Reset resets a filter context, removing all its existing state.
+// Accepts a new default action to be taken for syscalls which do not match.
+// Returns an error if the filter or action provided are invalid.
+func (f *ScmpFilter) Reset(defaultAction ScmpAction) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if err := sanitizeAction(defaultAction); err != nil {
+		return err
+	} else if !f.valid {
+		return errBadFilter
+	}
+
+	retCode := C.seccomp_reset(f.filterCtx, defaultAction.toNative())
+	if retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// Release releases a filter context, freeing its memory. Should be called after
+// loading into the kernel, when the filter is no longer needed.
+// After calling this function, the given filter is no longer valid and cannot
+// be used.
+// Release() will be invoked automatically when a filter context is garbage
+// collected, but can also be called manually to free memory.
+func (f *ScmpFilter) Release() {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if !f.valid {
+		return
+	}
+
+	f.valid = false
+	C.seccomp_release(f.filterCtx)
+}
+
+// Merge merges two filter contexts.
+// The source filter src will be released as part of the process, and will no
+// longer be usable or valid after this call.
+// To be merged, filters must NOT share any architectures, and all their
+// attributes (Default Action, Bad Arch Action, No New Privs and TSync bools)
+// must match.
+// The filter src will be merged into the filter this is called on.
+// The architectures of the src filter not present in the destination, and all
+// associated rules, will be added to the destination.
+// Returns an error if merging the filters failed.
+func (f *ScmpFilter) Merge(src *ScmpFilter) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	src.lock.Lock()
+	defer src.lock.Unlock()
+
+	if !src.valid || !f.valid {
+		return fmt.Errorf("one or more of the filter contexts is invalid or uninitialized")
+	}
+
+	// Merge the filters
+	retCode := C.seccomp_merge(f.filterCtx, src.filterCtx)
+	if syscall.Errno(-1*retCode) == syscall.EINVAL {
+		return fmt.Errorf("filters could not be merged due to a mismatch in attributes or invalid filter")
+	} else if retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	src.valid = false
+
+	return nil
+}
+
+// IsArchPresent checks if an architecture is present in a filter.
+// If a filter contains an architecture, it uses its default action for
+// syscalls which do not match rules in it, and its rules can match syscalls
+// for that ABI.
+// If a filter does not contain an architecture, all syscalls made to that
+// kernel ABI will fail with the filter's default Bad Architecture Action
+// (by default, killing the process).
+// Accepts an architecture constant.
+// Returns true if the architecture is present in the filter, false otherwise,
+// and an error on an invalid filter context, architecture constant, or an
+// issue with the call to libseccomp.
+func (f *ScmpFilter) IsArchPresent(arch ScmpArch) (bool, error) {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if err := sanitizeArch(arch); err != nil {
+		return false, err
+	} else if !f.valid {
+		return false, errBadFilter
+	}
+
+	retCode := C.seccomp_arch_exist(f.filterCtx, arch.toNative())
+	if syscall.Errno(-1*retCode) == syscall.EEXIST {
+		// -EEXIST is "arch not present"
+		return false, nil
+	} else if retCode != 0 {
+		return false, syscall.Errno(-1 * retCode)
+	}
+
+	return true, nil
+}
+
+// AddArch adds an architecture to the filter.
+// Accepts an architecture constant.
+// Returns an error on invalid filter context or architecture token, or an
+// issue with the call to libseccomp.
+func (f *ScmpFilter) AddArch(arch ScmpArch) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if err := sanitizeArch(arch); err != nil {
+		return err
+	} else if !f.valid {
+		return errBadFilter
+	}
+
+	// Libseccomp returns -EEXIST if the specified architecture is already
+	// present. Succeed silently in this case, as it's not fatal, and the
+	// architecture is present already.
+	retCode := C.seccomp_arch_add(f.filterCtx, arch.toNative())
+	if retCode != 0 && syscall.Errno(-1*retCode) != syscall.EEXIST {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// RemoveArch removes an architecture from the filter.
+// Accepts an architecture constant.
+// Returns an error on invalid filter context or architecture token, or an
+// issue with the call to libseccomp.
+func (f *ScmpFilter) RemoveArch(arch ScmpArch) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if err := sanitizeArch(arch); err != nil {
+		return err
+	} else if !f.valid {
+		return errBadFilter
+	}
+
+	// Similar to AddArch, -EEXIST is returned if the arch is not present
+	// Succeed silently in that case, this is not fatal and the architecture
+	// is not present in the filter after RemoveArch
+	retCode := C.seccomp_arch_remove(f.filterCtx, arch.toNative())
+	if retCode != 0 && syscall.Errno(-1*retCode) != syscall.EEXIST {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// Load loads a filter context into the kernel.
+// Returns an error if the filter context is invalid or the syscall failed.
+func (f *ScmpFilter) Load() error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if !f.valid {
+		return errBadFilter
+	}
+
+	if retCode := C.seccomp_load(f.filterCtx); retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// GetDefaultAction returns the default action taken on a syscall which does not
+// match a rule in the filter, or an error if an issue was encountered
+// retrieving the value.
+func (f *ScmpFilter) GetDefaultAction() (ScmpAction, error) {
+	action, err := f.getFilterAttr(filterAttrActDefault)
+	if err != nil {
+		return 0x0, err
+	}
+
+	return actionFromNative(action)
+}
+
+// GetBadArchAction returns the default action taken on a syscall for an
+// architecture not in the filter, or an error if an issue was encountered
+// retrieving the value.
+func (f *ScmpFilter) GetBadArchAction() (ScmpAction, error) {
+	action, err := f.getFilterAttr(filterAttrActBadArch)
+	if err != nil {
+		return 0x0, err
+	}
+
+	return actionFromNative(action)
+}
+
+// GetNoNewPrivsBit returns the current state the No New Privileges bit will be set
+// to on the filter being loaded, or an error if an issue was encountered
+// retrieving the value.
+// The No New Privileges bit tells the kernel that new processes run with exec()
+// cannot gain more privileges than the process that ran exec().
+// For example, a process with No New Privileges set would be unable to exec
+// setuid/setgid executables.
+func (f *ScmpFilter) GetNoNewPrivsBit() (bool, error) {
+	noNewPrivs, err := f.getFilterAttr(filterAttrNNP)
+	if err != nil {
+		return false, err
+	}
+
+	if noNewPrivs == 0 {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+// GetTsyncBit returns whether Thread Synchronization will be enabled on the
+// filter being loaded, or an error if an issue was encountered retrieving the
+// value.
+// Thread Sync ensures that all members of the thread group of the calling
+// process will share the same Seccomp filter set.
+// Tsync is a fairly recent addition to the Linux kernel and older kernels
+// lack support. If the running kernel does not support Tsync and it is
+// requested in a filter, Libseccomp will not enable TSync support and will
+// proceed as normal.
+// This function is unavailable before v2.2 of libseccomp and will return an
+// error.
+func (f *ScmpFilter) GetTsyncBit() (bool, error) {
+	tSync, err := f.getFilterAttr(filterAttrTsync)
+	if err != nil {
+		return false, err
+	}
+
+	if tSync == 0 {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+// SetBadArchAction sets the default action taken on a syscall for an
+// architecture not in the filter, or an error if an issue was encountered
+// setting the value.
+func (f *ScmpFilter) SetBadArchAction(action ScmpAction) error {
+	if err := sanitizeAction(action); err != nil {
+		return err
+	}
+
+	return f.setFilterAttr(filterAttrActBadArch, action.toNative())
+}
+
+// SetNoNewPrivsBit sets the state of the No New Privileges bit, which will be
+// applied on filter load, or an error if an issue was encountered setting the
+// value.
+// Filters with No New Privileges set to 0 can only be loaded if the process
+// has the CAP_SYS_ADMIN capability.
+func (f *ScmpFilter) SetNoNewPrivsBit(state bool) error {
+	var toSet C.uint32_t = 0x0
+
+	if state {
+		toSet = 0x1
+	}
+
+	return f.setFilterAttr(filterAttrNNP, toSet)
+}
+
+// SetTsync sets whether Thread Synchronization will be enabled on the filter
+// being loaded. Returns an error if setting Tsync failed, or the filter is
+// invalid.
+// Thread Sync ensures that all members of the thread group of the calling
+// process will share the same Seccomp filter set.
+// Tsync is a fairly recent addition to the Linux kernel and older kernels
+// lack support. If the running kernel does not support Tsync and it is
+// requested in a filter, Libseccomp will not enable TSync support and will
+// proceed as normal.
+// This function is unavailable before v2.2 of libseccomp and will return an
+// error.
+func (f *ScmpFilter) SetTsync(enable bool) error {
+	var toSet C.uint32_t = 0x0
+
+	if enable {
+		toSet = 0x1
+	}
+
+	return f.setFilterAttr(filterAttrTsync, toSet)
+}
+
+// SetSyscallPriority sets a syscall's priority.
+// This provides a hint to the filter generator in libseccomp about the
+// importance of this syscall. High-priority syscalls are placed
+// first in the filter code, and incur less overhead (at the expense of
+// lower-priority syscalls).
+func (f *ScmpFilter) SetSyscallPriority(call ScmpSyscall, priority uint8) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if !f.valid {
+		return errBadFilter
+	}
+
+	if retCode := C.seccomp_syscall_priority(f.filterCtx, C.int(call),
+		C.uint8_t(priority)); retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// AddRule adds a single rule for an unconditional action on a syscall.
+// Accepts the number of the syscall and the action to be taken on the call
+// being made.
+// Returns an error if an issue was encountered adding the rule.
+func (f *ScmpFilter) AddRule(call ScmpSyscall, action ScmpAction) error {
+	return f.addRuleGeneric(call, action, false, nil)
+}
+
+// AddRuleExact adds a single rule for an unconditional action on a syscall.
+// Accepts the number of the syscall and the action to be taken on the call
+// being made.
+// No modifications will be made to the rule, and it will fail to add if it
+// cannot be applied to the current architecture without modification.
+// The rule will function exactly as described, but it may not function identically
+// (or be able to be applied to) all architectures.
+// Returns an error if an issue was encountered adding the rule.
+func (f *ScmpFilter) AddRuleExact(call ScmpSyscall, action ScmpAction) error {
+	return f.addRuleGeneric(call, action, true, nil)
+}
+
+// AddRuleConditional adds a single rule for a conditional action on a syscall.
+// Returns an error if an issue was encountered adding the rule.
+// All conditions must match for the rule to match.
+// There is a bug in library versions below v2.2.1 which can, in some cases,
+// cause conditions to be lost when more than one are used. Consequently,
+// AddRuleConditional is disabled on library versions lower than v2.2.1
+func (f *ScmpFilter) AddRuleConditional(call ScmpSyscall, action ScmpAction, conds []ScmpCondition) error {
+	return f.addRuleGeneric(call, action, false, conds)
+}
+
+// AddRuleConditionalExact adds a single rule for a conditional action on a
+// syscall.
+// No modifications will be made to the rule, and it will fail to add if it
+// cannot be applied to the current architecture without modification.
+// The rule will function exactly as described, but it may not function identically
+// (or be able to be applied to) all architectures.
+// Returns an error if an issue was encountered adding the rule.
+// There is a bug in library versions below v2.2.1 which can, in some cases,
+// cause conditions to be lost when more than one are used. Consequently,
+// AddRuleConditionalExact is disabled on library versions lower than v2.2.1
+func (f *ScmpFilter) AddRuleConditionalExact(call ScmpSyscall, action ScmpAction, conds []ScmpCondition) error {
+	return f.addRuleGeneric(call, action, true, conds)
+}
+
+// ExportPFC output PFC-formatted, human-readable dump of a filter context's
+// rules to a file.
+// Accepts file to write to (must be open for writing).
+// Returns an error if writing to the file fails.
+func (f *ScmpFilter) ExportPFC(file *os.File) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	fd := file.Fd()
+
+	if !f.valid {
+		return errBadFilter
+	}
+
+	if retCode := C.seccomp_export_pfc(f.filterCtx, C.int(fd)); retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// ExportBPF outputs Berkeley Packet Filter-formatted, kernel-readable dump of a
+// filter context's rules to a file.
+// Accepts file to write to (must be open for writing).
+// Returns an error if writing to the file fails.
+func (f *ScmpFilter) ExportBPF(file *os.File) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	fd := file.Fd()
+
+	if !f.valid {
+		return errBadFilter
+	}
+
+	if retCode := C.seccomp_export_bpf(f.filterCtx, C.int(fd)); retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}

vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go

@@ -0,0 +1,514 @@
+// +build linux
+
+// Internal functions for libseccomp Go bindings
+// No exported functions
+
+package seccomp
+
+import (
+	"fmt"
+	"syscall"
+)
+
+// Unexported C wrapping code - provides the C-Golang interface
+// Get the seccomp header in scope
+// Need stdlib.h for free() on cstrings
+
+// #cgo pkg-config: libseccomp
+/*
+#include <stdlib.h>
+#include <seccomp.h>
+
+#if SCMP_VER_MAJOR < 2
+#error Minimum supported version of Libseccomp is v2.1.0
+#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 1
+#error Minimum supported version of Libseccomp is v2.1.0
+#endif
+
+#define ARCH_BAD ~0
+
+const uint32_t C_ARCH_BAD = ARCH_BAD;
+
+#ifndef SCMP_ARCH_AARCH64
+#define SCMP_ARCH_AARCH64 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_MIPS
+#define SCMP_ARCH_MIPS ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_MIPS64
+#define SCMP_ARCH_MIPS64 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_MIPS64N32
+#define SCMP_ARCH_MIPS64N32 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_MIPSEL
+#define SCMP_ARCH_MIPSEL ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_MIPSEL64
+#define SCMP_ARCH_MIPSEL64 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_MIPSEL64N32
+#define SCMP_ARCH_MIPSEL64N32 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_PPC
+#define SCMP_ARCH_PPC ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_PPC64
+#define SCMP_ARCH_PPC64 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_PPC64LE
+#define SCMP_ARCH_PPC64LE ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_S390
+#define SCMP_ARCH_S390 ARCH_BAD
+#endif
+
+#ifndef SCMP_ARCH_S390X
+#define SCMP_ARCH_S390X ARCH_BAD
+#endif
+
+const uint32_t C_ARCH_NATIVE       = SCMP_ARCH_NATIVE;
+const uint32_t C_ARCH_X86          = SCMP_ARCH_X86;
+const uint32_t C_ARCH_X86_64       = SCMP_ARCH_X86_64;
+const uint32_t C_ARCH_X32          = SCMP_ARCH_X32;
+const uint32_t C_ARCH_ARM          = SCMP_ARCH_ARM;
+const uint32_t C_ARCH_AARCH64      = SCMP_ARCH_AARCH64;
+const uint32_t C_ARCH_MIPS         = SCMP_ARCH_MIPS;
+const uint32_t C_ARCH_MIPS64       = SCMP_ARCH_MIPS64;
+const uint32_t C_ARCH_MIPS64N32    = SCMP_ARCH_MIPS64N32;
+const uint32_t C_ARCH_MIPSEL       = SCMP_ARCH_MIPSEL;
+const uint32_t C_ARCH_MIPSEL64     = SCMP_ARCH_MIPSEL64;
+const uint32_t C_ARCH_MIPSEL64N32  = SCMP_ARCH_MIPSEL64N32;
+const uint32_t C_ARCH_PPC          = SCMP_ARCH_PPC;
+const uint32_t C_ARCH_PPC64        = SCMP_ARCH_PPC64;
+const uint32_t C_ARCH_PPC64LE      = SCMP_ARCH_PPC64LE;
+const uint32_t C_ARCH_S390         = SCMP_ARCH_S390;
+const uint32_t C_ARCH_S390X        = SCMP_ARCH_S390X;
+
+const uint32_t C_ACT_KILL          = SCMP_ACT_KILL;
+const uint32_t C_ACT_TRAP          = SCMP_ACT_TRAP;
+const uint32_t C_ACT_ERRNO         = SCMP_ACT_ERRNO(0);
+const uint32_t C_ACT_TRACE         = SCMP_ACT_TRACE(0);
+const uint32_t C_ACT_ALLOW         = SCMP_ACT_ALLOW;
+
+// If TSync is not supported, make sure it doesn't map to a supported filter attribute
+// Don't worry about major version < 2, the minimum version checks should catch that case
+#if SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 2
+#define SCMP_FLTATR_CTL_TSYNC _SCMP_CMP_MIN
+#endif
+
+const uint32_t C_ATTRIBUTE_DEFAULT = (uint32_t)SCMP_FLTATR_ACT_DEFAULT;
+const uint32_t C_ATTRIBUTE_BADARCH = (uint32_t)SCMP_FLTATR_ACT_BADARCH;
+const uint32_t C_ATTRIBUTE_NNP     = (uint32_t)SCMP_FLTATR_CTL_NNP;
+const uint32_t C_ATTRIBUTE_TSYNC   = (uint32_t)SCMP_FLTATR_CTL_TSYNC;
+
+const int      C_CMP_NE            = (int)SCMP_CMP_NE;
+const int      C_CMP_LT            = (int)SCMP_CMP_LT;
+const int      C_CMP_LE            = (int)SCMP_CMP_LE;
+const int      C_CMP_EQ            = (int)SCMP_CMP_EQ;
+const int      C_CMP_GE            = (int)SCMP_CMP_GE;
+const int      C_CMP_GT            = (int)SCMP_CMP_GT;
+const int      C_CMP_MASKED_EQ     = (int)SCMP_CMP_MASKED_EQ;
+
+const int      C_VERSION_MAJOR     = SCMP_VER_MAJOR;
+const int      C_VERSION_MINOR     = SCMP_VER_MINOR;
+const int      C_VERSION_MICRO     = SCMP_VER_MICRO;
+
+typedef struct scmp_arg_cmp* scmp_cast_t;
+
+// Wrapper to create an scmp_arg_cmp struct
+void*
+make_struct_arg_cmp(
+                    unsigned int arg,
+                    int compare,
+                    uint64_t a,
+                    uint64_t b
+                   )
+{
+	struct scmp_arg_cmp *s = malloc(sizeof(struct scmp_arg_cmp));
+
+	s->arg = arg;
+	s->op = compare;
+	s->datum_a = a;
+	s->datum_b = b;
+
+	return s;
+}
+*/
+import "C"
+
+// Nonexported types
+type scmpFilterAttr uint32
+
+// Nonexported constants
+
+const (
+	filterAttrActDefault scmpFilterAttr = iota
+	filterAttrActBadArch scmpFilterAttr = iota
+	filterAttrNNP        scmpFilterAttr = iota
+	filterAttrTsync      scmpFilterAttr = iota
+)
+
+const (
+	// An error return from certain libseccomp functions
+	scmpError C.int = -1
+	// Comparison boundaries to check for architecture validity
+	archStart ScmpArch = ArchNative
+	archEnd   ScmpArch = ArchS390X
+	// Comparison boundaries to check for action validity
+	actionStart ScmpAction = ActKill
+	actionEnd   ScmpAction = ActAllow
+	// Comparison boundaries to check for comparison operator validity
+	compareOpStart ScmpCompareOp = CompareNotEqual
+	compareOpEnd   ScmpCompareOp = CompareMaskedEqual
+)
+
+var (
+	// Error thrown on bad filter context
+	errBadFilter = fmt.Errorf("filter is invalid or uninitialized")
+	// Constants representing library major, minor, and micro versions
+	verMajor = int(C.C_VERSION_MAJOR)
+	verMinor = int(C.C_VERSION_MINOR)
+	verMicro = int(C.C_VERSION_MICRO)
+)
+
+// Nonexported functions
+
+// Check if library version is greater than or equal to the given one
+func checkVersionAbove(major, minor, micro int) bool {
+	return (verMajor > major) ||
+		(verMajor == major && verMinor > minor) ||
+		(verMajor == major && verMinor == minor && verMicro >= micro)
+}
+
+// Ensure that the library is supported, i.e. >= 2.1.0.
+func ensureSupportedVersion() error {
+	if !checkVersionAbove(2, 1, 0) {
+		return VersionError{}
+	}
+	return nil
+}
+
+// Filter helpers
+
+// Filter finalizer - ensure that kernel context for filters is freed
+func filterFinalizer(f *ScmpFilter) {
+	f.Release()
+}
+
+// Get a raw filter attribute
+func (f *ScmpFilter) getFilterAttr(attr scmpFilterAttr) (C.uint32_t, error) {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if !f.valid {
+		return 0x0, errBadFilter
+	}
+
+	if !checkVersionAbove(2, 2, 0) && attr == filterAttrTsync {
+		return 0x0, VersionError{
+			message: "thread synchronization attribute is not supported",
+			minimum: "2.2.0",
+		}
+	}
+
+	var attribute C.uint32_t
+
+	retCode := C.seccomp_attr_get(f.filterCtx, attr.toNative(), &attribute)
+	if retCode != 0 {
+		return 0x0, syscall.Errno(-1 * retCode)
+	}
+
+	return attribute, nil
+}
+
+// Set a raw filter attribute
+func (f *ScmpFilter) setFilterAttr(attr scmpFilterAttr, value C.uint32_t) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if !f.valid {
+		return errBadFilter
+	}
+
+	if !checkVersionAbove(2, 2, 0) && attr == filterAttrTsync {
+		return VersionError{
+			message: "thread synchronization attribute is not supported",
+			minimum: "2.2.0",
+		}
+	}
+
+	retCode := C.seccomp_attr_set(f.filterCtx, attr.toNative(), value)
+	if retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// DOES NOT LOCK OR CHECK VALIDITY
+// Assumes caller has already done this
+// Wrapper for seccomp_rule_add_... functions
+func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact bool, cond C.scmp_cast_t) error {
+	var length C.uint
+	if cond != nil {
+		length = 1
+	} else {
+		length = 0
+	}
+
+	var retCode C.int
+	if exact {
+		retCode = C.seccomp_rule_add_exact_array(f.filterCtx, action.toNative(), C.int(call), length, cond)
+	} else {
+		retCode = C.seccomp_rule_add_array(f.filterCtx, action.toNative(), C.int(call), length, cond)
+	}
+
+	if syscall.Errno(-1*retCode) == syscall.EFAULT {
+		return fmt.Errorf("unrecognized syscall")
+	} else if syscall.Errno(-1*retCode) == syscall.EPERM {
+		return fmt.Errorf("requested action matches default action of filter")
+	} else if retCode != 0 {
+		return syscall.Errno(-1 * retCode)
+	}
+
+	return nil
+}
+
+// Generic add function for filter rules
+func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact bool, conds []ScmpCondition) error {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if !f.valid {
+		return errBadFilter
+	}
+
+	if len(conds) == 0 {
+		if err := f.addRuleWrapper(call, action, exact, nil); err != nil {
+			return err
+		}
+	} else {
+		// We don't support conditional filtering in library version v2.1
+		if !checkVersionAbove(2, 2, 1) {
+			return VersionError{
+				message: "conditional filtering is not supported",
+				minimum: "2.2.1",
+			}
+		}
+
+		for _, cond := range conds {
+			cmpStruct := C.make_struct_arg_cmp(C.uint(cond.Argument), cond.Op.toNative(), C.uint64_t(cond.Operand1), C.uint64_t(cond.Operand2))
+			defer C.free(cmpStruct)
+
+			if err := f.addRuleWrapper(call, action, exact, C.scmp_cast_t(cmpStruct)); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// Generic Helpers
+
+// Helper - Sanitize Arch token input
+func sanitizeArch(in ScmpArch) error {
+	if in < archStart || in > archEnd {
+		return fmt.Errorf("unrecognized architecture")
+	}
+
+	if in.toNative() == C.C_ARCH_BAD {
+		return fmt.Errorf("architecture is not supported on this version of the library")
+	}
+
+	return nil
+}
+
+func sanitizeAction(in ScmpAction) error {
+	inTmp := in & 0x0000FFFF
+	if inTmp < actionStart || inTmp > actionEnd {
+		return fmt.Errorf("unrecognized action")
+	}
+
+	if inTmp != ActTrace && inTmp != ActErrno && (in&0xFFFF0000) != 0 {
+		return fmt.Errorf("highest 16 bits must be zeroed except for Trace and Errno")
+	}
+
+	return nil
+}
+
+func sanitizeCompareOp(in ScmpCompareOp) error {
+	if in < compareOpStart || in > compareOpEnd {
+		return fmt.Errorf("unrecognized comparison operator")
+	}
+
+	return nil
+}
+
+func archFromNative(a C.uint32_t) (ScmpArch, error) {
+	switch a {
+	case C.C_ARCH_X86:
+		return ArchX86, nil
+	case C.C_ARCH_X86_64:
+		return ArchAMD64, nil
+	case C.C_ARCH_X32:
+		return ArchX32, nil
+	case C.C_ARCH_ARM:
+		return ArchARM, nil
+	case C.C_ARCH_NATIVE:
+		return ArchNative, nil
+	case C.C_ARCH_AARCH64:
+		return ArchARM64, nil
+	case C.C_ARCH_MIPS:
+		return ArchMIPS, nil
+	case C.C_ARCH_MIPS64:
+		return ArchMIPS64, nil
+	case C.C_ARCH_MIPS64N32:
+		return ArchMIPS64N32, nil
+	case C.C_ARCH_MIPSEL:
+		return ArchMIPSEL, nil
+	case C.C_ARCH_MIPSEL64:
+		return ArchMIPSEL64, nil
+	case C.C_ARCH_MIPSEL64N32:
+		return ArchMIPSEL64N32, nil
+	case C.C_ARCH_PPC:
+		return ArchPPC, nil
+	case C.C_ARCH_PPC64:
+		return ArchPPC64, nil
+	case C.C_ARCH_PPC64LE:
+		return ArchPPC64LE, nil
+	case C.C_ARCH_S390:
+		return ArchS390, nil
+	case C.C_ARCH_S390X:
+		return ArchS390X, nil
+	default:
+		return 0x0, fmt.Errorf("unrecognized architecture")
+	}
+}
+
+// Only use with sanitized arches, no error handling
+func (a ScmpArch) toNative() C.uint32_t {
+	switch a {
+	case ArchX86:
+		return C.C_ARCH_X86
+	case ArchAMD64:
+		return C.C_ARCH_X86_64
+	case ArchX32:
+		return C.C_ARCH_X32
+	case ArchARM:
+		return C.C_ARCH_ARM
+	case ArchARM64:
+		return C.C_ARCH_AARCH64
+	case ArchMIPS:
+		return C.C_ARCH_MIPS
+	case ArchMIPS64:
+		return C.C_ARCH_MIPS64
+	case ArchMIPS64N32:
+		return C.C_ARCH_MIPS64N32
+	case ArchMIPSEL:
+		return C.C_ARCH_MIPSEL
+	case ArchMIPSEL64:
+		return C.C_ARCH_MIPSEL64
+	case ArchMIPSEL64N32:
+		return C.C_ARCH_MIPSEL64N32
+	case ArchPPC:
+		return C.C_ARCH_PPC
+	case ArchPPC64:
+		return C.C_ARCH_PPC64
+	case ArchPPC64LE:
+		return C.C_ARCH_PPC64LE
+	case ArchS390:
+		return C.C_ARCH_S390
+	case ArchS390X:
+		return C.C_ARCH_S390X
+	case ArchNative:
+		return C.C_ARCH_NATIVE
+	default:
+		return 0x0
+	}
+}
+
+// Only use with sanitized ops, no error handling
+func (a ScmpCompareOp) toNative() C.int {
+	switch a {
+	case CompareNotEqual:
+		return C.C_CMP_NE
+	case CompareLess:
+		return C.C_CMP_LT
+	case CompareLessOrEqual:
+		return C.C_CMP_LE
+	case CompareEqual:
+		return C.C_CMP_EQ
+	case CompareGreaterEqual:
+		return C.C_CMP_GE
+	case CompareGreater:
+		return C.C_CMP_GT
+	case CompareMaskedEqual:
+		return C.C_CMP_MASKED_EQ
+	default:
+		return 0x0
+	}
+}
+
+func actionFromNative(a C.uint32_t) (ScmpAction, error) {
+	aTmp := a & 0xFFFF
+	switch a & 0xFFFF0000 {
+	case C.C_ACT_KILL:
+		return ActKill, nil
+	case C.C_ACT_TRAP:
+		return ActTrap, nil
+	case C.C_ACT_ERRNO:
+		return ActErrno.SetReturnCode(int16(aTmp)), nil
+	case C.C_ACT_TRACE:
+		return ActTrace.SetReturnCode(int16(aTmp)), nil
+	case C.C_ACT_ALLOW:
+		return ActAllow, nil
+	default:
+		return 0x0, fmt.Errorf("unrecognized action")
+	}
+}
+
+// Only use with sanitized actions, no error handling
+func (a ScmpAction) toNative() C.uint32_t {
+	switch a & 0xFFFF {
+	case ActKill:
+		return C.C_ACT_KILL
+	case ActTrap:
+		return C.C_ACT_TRAP
+	case ActErrno:
+		return C.C_ACT_ERRNO | (C.uint32_t(a) >> 16)
+	case ActTrace:
+		return C.C_ACT_TRACE | (C.uint32_t(a) >> 16)
+	case ActAllow:
+		return C.C_ACT_ALLOW
+	default:
+		return 0x0
+	}
+}
+
+// Internal only, assumes safe attribute
+func (a scmpFilterAttr) toNative() uint32 {
+	switch a {
+	case filterAttrActDefault:
+		return uint32(C.C_ATTRIBUTE_DEFAULT)
+	case filterAttrActBadArch:
+		return uint32(C.C_ATTRIBUTE_BADARCH)
+	case filterAttrNNP:
+		return uint32(C.C_ATTRIBUTE_NNP)
+	case filterAttrTsync:
+		return uint32(C.C_ATTRIBUTE_TSYNC)
+	default:
+		return 0x0
+	}
+}