1 files changed, 128 insertions, 0 deletions
diff --git a/pkg/spec/parse.go b/pkg/spec/parse.go
new file mode 100644
index 000000000..920674b10
--- /dev/null
+++ b/pkg/spec/parse.go
@@ -0,0 +1,128 @@
+package createconfig
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/docker/go-units"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	spec "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// weightDevice is a structure that holds device:weight pair
+type weightDevice struct {
+	path   string
+	weight uint16
+}
+
+func (w *weightDevice) String() string {
+	return fmt.Sprintf("%s:%d", w.path, w.weight)
+}
+
+// validateweightDevice validates that the specified string has a valid device-weight format
+// for blkio-weight-device flag
+func validateweightDevice(val string) (*weightDevice, error) {
+	split := strings.SplitN(val, ":", 2)
+	if len(split) != 2 {
+		return nil, fmt.Errorf("bad format: %s", val)
+	}
+	if !strings.HasPrefix(split[0], "/dev/") {
+		return nil, fmt.Errorf("bad format for device path: %s", val)
+	}
+	weight, err := strconv.ParseUint(split[1], 10, 0)
+	if err != nil {
+		return nil, fmt.Errorf("invalid weight for device: %s", val)
+	}
+	if weight > 0 && (weight < 10 || weight > 1000) {
+		return nil, fmt.Errorf("invalid weight for device: %s", val)
+	}
+
+	return &weightDevice{
+		path:   split[0],
+		weight: uint16(weight),
+	}, nil
+}
+
+// throttleDevice is a structure that holds device:rate_per_second pair
+type throttleDevice struct {
+	path string
+	rate uint64
+}
+
+func (t *throttleDevice) String() string {
+	return fmt.Sprintf("%s:%d", t.path, t.rate)
+}
+
+// validateBpsDevice validates that the specified string has a valid device-rate format
+// for device-read-bps and device-write-bps flags
+func validateBpsDevice(val string) (*throttleDevice, error) {
+	split := strings.SplitN(val, ":", 2)
+	if len(split) != 2 {
+		return nil, fmt.Errorf("bad format: %s", val)
+	}
+	if !strings.HasPrefix(split[0], "/dev/") {
+		return nil, fmt.Errorf("bad format for device path: %s", val)
+	}
+	rate, err := units.RAMInBytes(split[1])
+	if err != nil {
+		return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
+	}
+	if rate < 0 {
+		return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
+	}
+
+	return &throttleDevice{
+		path: split[0],
+		rate: uint64(rate),
+	}, nil
+}
+
+// validateIOpsDevice validates that the specified string has a valid device-rate format
+// for device-write-iops and device-read-iops flags
+func validateIOpsDevice(val string) (*throttleDevice, error) { //nolint
+	split := strings.SplitN(val, ":", 2)
+	if len(split) != 2 {
+		return nil, fmt.Errorf("bad format: %s", val)
+	}
+	if !strings.HasPrefix(split[0], "/dev/") {
+		return nil, fmt.Errorf("bad format for device path: %s", val)
+	}
+	rate, err := strconv.ParseUint(split[1], 10, 64)
+	if err != nil {
+		return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
+	}
+	if rate < 0 {
+		return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
+	}
+
+	return &throttleDevice{
+		path: split[0],
+		rate: uint64(rate),
+	}, nil
+}
+
+func getLoggingPath(opts []string) string {
+	for _, opt := range opts {
+		arr := strings.SplitN(opt, "=", 2)
+		if len(arr) == 2 {
+			if strings.TrimSpace(arr[0]) == "path" {
+				return strings.TrimSpace(arr[1])
+			}
+		}
+	}
+	return ""
+}
+
+// Device transforms a libcontainer configs.Device to a specs.LinuxDevice object.
+func Device(d *configs.Device) spec.LinuxDevice {
+	return spec.LinuxDevice{
+		Type:     string(d.Type),
+		Path:     d.Path,
+		Major:    d.Major,
+		Minor:    d.Minor,
+		FileMode: fmPtr(int64(d.FileMode)),
+		UID:      u32Ptr(int64(d.Uid)),
+		GID:      u32Ptr(int64(d.Gid)),
+	}
+}