diff options
Diffstat (limited to 'vendor/github.com/opencontainers')
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)) +} |