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authorDaniel J Walsh <dwalsh@redhat.com>2017-12-19 09:07:49 -0500
committerAtomic Bot <atomic-devel@projectatomic.io>2017-12-19 18:51:52 +0000
commit94a810751539afeb1590ccc1a9745f1d5767fda2 (patch)
tree0e143bd90c976c60db4f0435d12c6266e0fe3e72 /vendor/github.com/opencontainers/runc/libcontainer
parentc0432eb0e8a2c777a5c6d8caa01475c06553594c (diff)
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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
Diffstat (limited to 'vendor/github.com/opencontainers/runc/libcontainer')
-rw-r--r--vendor/github.com/opencontainers/runc/libcontainer/devices/devices_linux.go100
-rw-r--r--vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unsupported.go3
-rw-r--r--vendor/github.com/opencontainers/runc/libcontainer/devices/number.go24
3 files changed, 127 insertions, 0 deletions
diff --git a/vendor/github.com/opencontainers/runc/libcontainer/devices/devices_linux.go b/vendor/github.com/opencontainers/runc/libcontainer/devices/devices_linux.go
new file mode 100644
index 000000000..461dc097c
--- /dev/null
+++ b/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
+}
diff --git a/vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unsupported.go b/vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unsupported.go
new file mode 100644
index 000000000..6649b9f2d
--- /dev/null
+++ b/vendor/github.com/opencontainers/runc/libcontainer/devices/devices_unsupported.go
@@ -0,0 +1,3 @@
+// +build !linux
+
+package devices
diff --git a/vendor/github.com/opencontainers/runc/libcontainer/devices/number.go b/vendor/github.com/opencontainers/runc/libcontainer/devices/number.go
new file mode 100644
index 000000000..885b6e5dd
--- /dev/null
+++ b/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))
+}