blob: a9883eb4bba2ce345149f9e1c22e1d548b7a36ef [file] [log] [blame]
// +build linux
package fs
import (
"github.com/opencontainers/runc/libcontainer/cgroups"
"github.com/opencontainers/runc/libcontainer/configs"
)
type DevicesGroup struct {
}
func (s *DevicesGroup) Name() string {
return "devices"
}
func (s *DevicesGroup) Apply(d *cgroupData) error {
dir, err := d.join("devices")
if err != nil {
// We will return error even it's `not found` error, devices
// cgroup is hard requirement for container's security.
return err
}
if err := s.Set(dir, d.config); err != nil {
return err
}
return nil
}
func (s *DevicesGroup) Set(path string, cgroup *configs.Cgroup) error {
if !cgroup.Resources.AllowAllDevices {
if err := writeFile(path, "devices.deny", "a"); err != nil {
return err
}
for _, dev := range cgroup.Resources.AllowedDevices {
if err := writeFile(path, "devices.allow", dev.CgroupString()); err != nil {
return err
}
}
return nil
}
if err := writeFile(path, "devices.allow", "a"); err != nil {
return err
}
for _, dev := range cgroup.Resources.DeniedDevices {
if err := writeFile(path, "devices.deny", dev.CgroupString()); err != nil {
return err
}
}
return nil
}
func (s *DevicesGroup) Remove(d *cgroupData) error {
return removePath(d.path("devices"))
}
func (s *DevicesGroup) GetStats(path string, stats *cgroups.Stats) error {
return nil
}