Add support for adding devices to container

Also add --quiet option to kpod create/run since
this will help with writing tests.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #140
Approved by: TomSweeneyRedHat

cmd/podman/common.go

@@ -362,6 +362,10 @@ var createFlags = []cli.Flag{
 		Name:  "publish-all, P",
 		Usage: "Publish all exposed ports to random ports on the host interface",
 	},
+	cli.BoolFlag{
+		Name:  "quiet, q",
+		Usage: "Suppress output information when pulling images",
+	},
 	cli.BoolFlag{
 		Name:  "read-only",
 		Usage: "Make containers root filesystem read-only",

cmd/podman/create.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"os"
 	"strconv"
 	"strings"
@@ -14,7 +15,6 @@ import (
 	"github.com/projectatomic/libpod/libpod"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
-	pb "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
 )
 
 type mountType string
@@ -72,7 +72,7 @@ type createConfig struct {
 	CgroupParent       string // cgroup-parent
 	Command            []string
 	Detach             bool              // detach
-	Devices            []*pb.Device      // device
+	Devices            []string          // device
 	DNSOpt             []string          //dns-opt
 	DNSSearch          []string          //dns-search
 	DNSServers         []string          //dns
@@ -101,6 +101,7 @@ type createConfig struct {
 	Privileged         bool     //privileged
 	Publish            []string //publish
 	PublishAll         bool     //publish-all
+	Quiet              bool     //quiet
 	ReadOnlyRootfs     bool     //read-only
 	Resources          createResourceConfig
 	Rm                 bool //rm
@@ -167,8 +168,11 @@ func createCmd(c *cli.Context) error {
 	if createImage.LocalName == "" {
 		// The image wasnt found by the user input'd name or its fqname
 		// Pull the image
-		fmt.Printf("Trying to pull %s...", createImage.PullName)
-		createImage.Pull()
+		var writer io.Writer
+		if !createConfig.Quiet {
+			writer = os.Stdout
+		}
+		createImage.Pull(writer)
 	}
 
 	runtimeSpec, err := createConfigToOCISpec(createConfig)
@@ -419,6 +423,7 @@ func parseCreateOpts(c *cli.Context, runtime *libpod.Runtime) (*createConfig, er
 		CgroupParent:   c.String("cgroup-parent"),
 		Command:        command,
 		Detach:         c.Bool("detach"),
+		Devices:        c.StringSlice("device"),
 		DNSOpt:         c.StringSlice("dns-opt"),
 		DNSSearch:      c.StringSlice("dns-search"),
 		DNSServers:     c.StringSlice("dns"),
@@ -447,6 +452,7 @@ func parseCreateOpts(c *cli.Context, runtime *libpod.Runtime) (*createConfig, er
 		Privileged:     c.Bool("privileged"),
 		Publish:        c.StringSlice("publish"),
 		PublishAll:     c.Bool("publish-all"),
+		Quiet:          c.Bool("quiet"),
 		ReadOnlyRootfs: c.Bool("read-only"),
 		Resources: createResourceConfig{
 			BlkioWeight:       blkioWeight,

cmd/podman/run.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"fmt"
+	"io"
+	"os"
 	"sync"
 
 	"github.com/pkg/errors"
@@ -44,7 +46,11 @@ func runCmd(c *cli.Context) error {
 	if createImage.LocalName == "" {
 		// The image wasnt found by the user input'd name or its fqname
 		// Pull the image
-		createImage.Pull()
+		var writer io.Writer
+		if !createConfig.Quiet {
+			writer = os.Stdout
+		}
+		createImage.Pull(writer)
 	}
 
 	runtimeSpec, err := createConfigToOCISpec(createConfig)

cmd/podman/spec.go

@@ -10,6 +10,7 @@ import (
 	"github.com/docker/docker/daemon/caps"
 	"github.com/docker/docker/pkg/mount"
 	"github.com/docker/go-units"
+	"github.com/opencontainers/runc/libcontainer/devices"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/opencontainers/runtime-tools/generate"
 	"github.com/opencontainers/selinux/go-selinux/label"
@@ -163,6 +164,25 @@ func setupCapabilities(config *createConfig, configSpec *spec.Spec) error {
 	return nil
 }
 
+func addDevice(g *generate.Generator, device string) error {
+	dev, err := devices.DeviceFromPath(device, "rwm")
+	if err != nil {
+		return errors.Wrapf(err, "%s is not a valid device", device)
+	}
+	linuxdev := spec.LinuxDevice{
+		Path:     dev.Path,
+		Type:     string(dev.Type),
+		Major:    dev.Major,
+		Minor:    dev.Minor,
+		FileMode: &dev.FileMode,
+		UID:      &dev.Uid,
+		GID:      &dev.Gid,
+	}
+	g.AddDevice(linuxdev)
+	g.AddLinuxResourcesDevice(true, string(dev.Type), &dev.Major, &dev.Minor, dev.Permissions)
+	return nil
+}
+
 // Parses information needed to create a container into an OCI runtime spec
 func createConfigToOCISpec(config *createConfig) (*spec.Spec, error) {
 	g := generate.New()
@@ -233,6 +253,13 @@ func createConfigToOCISpec(config *createConfig) (*spec.Spec, error) {
 		g.SetLinuxResourcesCPUMems(config.Resources.CPUsetMems)
 	}
 
+	// Devices
+	for _, device := range config.Devices {
+		if err := addDevice(&g, device); err != nil {
+			return nil, err
+		}
+	}
+
 	// SECURITY OPTS
 	g.SetProcessNoNewPrivileges(config.NoNewPrivileges)
 	g.SetProcessApparmorProfile(config.ApparmorProfile)
@@ -321,7 +348,6 @@ func createConfigToOCISpec(config *createConfig) (*spec.Spec, error) {
 			Hooks: &configSpec.Hooks{},
 			//Annotations
 				Resources: &configSpec.LinuxResources{
-					Devices: config.GetDefaultDevices(),
 					BlockIO: &blkio,
 					//HugepageLimits:
 					Network: &configSpec.LinuxNetwork{
@@ -331,7 +357,6 @@ func createConfigToOCISpec(config *createConfig) (*spec.Spec, error) {
 				},
 				//CgroupsPath:
 				//Namespaces: []LinuxNamespace
-				//Devices
 				// DefaultAction:
 				// Architectures
 				// Syscalls:

completions/bash/podman

@@ -1018,6 +1018,7 @@ _podman_container_run() {
 		--oom-kill-disable
 		--privileged
 		--publish-all -P
+		--quiet
 		--read-only
 		--tty -t
 	"

docs/podman-create.1.md

@@ -373,6 +373,10 @@ port to a random port on the host within an *ephemeral port range* defined by
 `/proc/sys/net/ipv4/ip_local_port_range`. To find the mapping between the host
 ports and the exposed ports, use `podman port`.
 
+**--quiet, -q**
+
+Suppress output information when pulling images
+
 **--read-only**=*true*|*false*
    Mount the container's root filesystem as read only.
 

docs/podman-run.1.md

@@ -379,6 +379,10 @@ port to a random port on the host within an *ephemeral port range* defined by
 `/proc/sys/net/ipv4/ip_local_port_range`. To find the mapping between the host
 ports and the exposed ports, use `podman port`.
 
+**--quiet, -q**
+
+Suppress output information when pulling images
+
 **--read-only**=*true*|*false*
    Mount the container's root filesystem as read only.
 

libpod/runtime_img.go

@@ -397,7 +397,7 @@ func (k *Image) HasLatest() (bool, error) {
 }
 
 // Pull is a wrapper function to pull and image
-func (k *Image) Pull() error {
+func (k *Image) Pull(writer io.Writer) error {
 	// If the image hasn't been decomposed yet
 	if !k.beenDecomposed {
 		err := k.Decompose()
@@ -405,7 +405,7 @@ func (k *Image) Pull() error {
 			return err
 		}
 	}
-	k.runtime.PullImage(k.PullName, CopyOptions{Writer: os.Stdout, SignaturePolicyPath: k.runtime.config.SignaturePolicyPath})
+	k.runtime.PullImage(k.PullName, CopyOptions{Writer: writer, SignaturePolicyPath: k.runtime.config.SignaturePolicyPath})
 	return nil
 }
 

test/podman_run_device.bats

@@ -0,0 +1,27 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function teardown() {
+    cleanup_test
+}
+
+function setup() {
+    prepare_network_conf
+    copy_images
+}
+
+@test "run baddevice test" {
+    run ${PODMAN_BINARY} ${PODMAN_OPTIONS} run -q --device /dev/baddevice ${ALPINE}  ls /dev/kmsg
+    echo $output
+    [ "$status" -ne 0 ]
+}
+
+@test "run device test" {
+    run ${PODMAN_BINARY} ${PODMAN_OPTIONS} run -q --device /dev/kmsg ${ALPINE}  ls --color=never /dev/kmsg
+    echo "$output"
+    [ "$status" -eq 0 ]
+    device=$(echo $output | tr -d '\r')
+    echo "<$device>"
+    [ "$device" = "/dev/kmsg" ]
+}

vendor.conf

@@ -1,14 +1,14 @@
 #
 github.com/sirupsen/logrus v1.0.0
-github.com/containers/image c8bcd6aa11c62637c5a7da1420f43dd6a15f0e8d
+github.com/containers/image 9b4510f6d1627c8e53c3303a8fe48ca7842c2ace
 github.com/docker/docker-credential-helpers d68f9aeca33f5fd3f08eeae5e9d175edf4e731d1
 github.com/ostreedev/ostree-go master
-github.com/containers/storage 9e0c323a4b425557f8310ee8d125634acd39d8f5
+github.com/containers/storage 1824cf917a6b42d8c41179e807bb20a5fd6c0f0a
 github.com/containernetworking/cni v0.4.0
 google.golang.org/grpc v1.0.4 https://github.com/grpc/grpc-go
 github.com/opencontainers/selinux b29023b86e4a69d1b46b7e7b4e2b6fda03f0b9cd
 github.com/opencontainers/go-digest v1.0.0-rc0
-github.com/opencontainers/runtime-tools d3f7e9e9e631c7e87552d67dc7c86de33c3fb68a
+github.com/opencontainers/runtime-tools v0.3.0
 github.com/opencontainers/runc 45bde006ca8c90e089894508708bcf0e2cdf9e13
 github.com/mrunalp/fileutils master
 github.com/vishvananda/netlink master
@@ -97,3 +97,6 @@ github.com/pquerna/ffjson d49c2bc1aa135aad0c6f4fc2056623ec78f5d5ac
 github.com/stretchr/testify 4d4bfba8f1d1027c4fdbe371823030df51419987
 github.com/pmezard/go-difflib 792786c7400a136282c1664665ae0a8db921c6c2
 github.com/containerd/continuity master
+github.com/xeipuuv/gojsonschema  master
+github.com/xeipuuv/gojsonreference master
+github.com/xeipuuv/gojsonpointer master

vendor/github.com/opencontainers/runc/libcontainer/devices/devices_linux.go

@@ -0,0 +1,100 @@
+package devices
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/opencontainers/runc/libcontainer/configs"
+
+	"golang.org/x/sys/unix"
+)
+
+var (
+	ErrNotADevice = errors.New("not a device node")
+)
+
+// Testing dependencies
+var (
+	unixLstat     = unix.Lstat
+	ioutilReadDir = ioutil.ReadDir
+)
+
+// Given the path to a device and its cgroup_permissions(which cannot be easily queried) look up the information about a linux device and return that information as a Device struct.
+func DeviceFromPath(path, permissions string) (*configs.Device, error) {
+	var stat unix.Stat_t
+	err := unixLstat(path, &stat)
+	if err != nil {
+		return nil, err
+	}
+	var (
+		devType rune
+		mode    = stat.Mode
+	)
+	switch {
+	case mode&unix.S_IFBLK == unix.S_IFBLK:
+		devType = 'b'
+	case mode&unix.S_IFCHR == unix.S_IFCHR:
+		devType = 'c'
+	default:
+		return nil, ErrNotADevice
+	}
+	devNumber := int(stat.Rdev)
+	uid := stat.Uid
+	gid := stat.Gid
+	return &configs.Device{
+		Type:        devType,
+		Path:        path,
+		Major:       Major(devNumber),
+		Minor:       Minor(devNumber),
+		Permissions: permissions,
+		FileMode:    os.FileMode(mode),
+		Uid:         uid,
+		Gid:         gid,
+	}, nil
+}
+
+func HostDevices() ([]*configs.Device, error) {
+	return getDevices("/dev")
+}
+
+func getDevices(path string) ([]*configs.Device, error) {
+	files, err := ioutilReadDir(path)
+	if err != nil {
+		return nil, err
+	}
+	out := []*configs.Device{}
+	for _, f := range files {
+		switch {
+		case f.IsDir():
+			switch f.Name() {
+			// ".lxc" & ".lxd-mounts" added to address https://github.com/lxc/lxd/issues/2825
+			case "pts", "shm", "fd", "mqueue", ".lxc", ".lxd-mounts":
+				continue
+			default:
+				sub, err := getDevices(filepath.Join(path, f.Name()))
+				if err != nil {
+					return nil, err
+				}
+
+				out = append(out, sub...)
+				continue
+			}
+		case f.Name() == "console":
+			continue
+		}
+		device, err := DeviceFromPath(filepath.Join(path, f.Name()), "rwm")
+		if err != nil {
+			if err == ErrNotADevice {
+				continue
+			}
+			if os.IsNotExist(err) {
+				continue
+			}
+			return nil, err
+		}
+		out = append(out, device)
+	}
+	return out, nil
+}

vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unsupported.go

@@ -0,0 +1,3 @@
+// +build !linux
+
+package devices

vendor/github.com/opencontainers/runc/libcontainer/devices/number.go

@@ -0,0 +1,24 @@
+// +build linux freebsd
+
+package devices
+
+/*
+
+This code provides support for manipulating linux device numbers.  It should be replaced by normal syscall functions once http://code.google.com/p/go/issues/detail?id=8106 is solved.
+
+You can read what they are here:
+
+ - http://www.makelinux.net/ldd3/chp-3-sect-2
+ - http://www.linux-tutorial.info/modules.php?name=MContent&pageid=94
+
+Note! These are NOT the same as the MAJOR(dev_t device);, MINOR(dev_t device); and MKDEV(int major, int minor); functions as defined in <linux/kdev_t.h> as the representation of device numbers used by go is different than the one used internally to the kernel! - https://github.com/torvalds/linux/blob/master/include/linux/kdev_t.h#L9
+
+*/
+
+func Major(devNumber int) int64 {
+	return int64((devNumber >> 8) & 0xfff)
+}
+
+func Minor(devNumber int) int64 {
+	return int64((devNumber & 0xff) | ((devNumber >> 12) & 0xfff00))
+}