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package opts
import (
"fmt"
"strconv"
"strings"
"github.com/docker/docker/api/types/blkiodev"
"github.com/docker/go-units"
)
// ValidatorThrottleFctType defines a validator function that returns a validated struct and/or an error.
type ValidatorThrottleFctType func(val string) (*blkiodev.ThrottleDevice, error)
// ValidateThrottleBpsDevice validates that the specified string has a valid device-rate format.
func ValidateThrottleBpsDevice(val string) (*blkiodev.ThrottleDevice, error) {
k, v, ok := strings.Cut(val, ":")
if !ok || k == "" {
return nil, fmt.Errorf("bad format: %s", val)
}
// TODO(thaJeztah): should we really validate this on the client?
if !strings.HasPrefix(k, "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
rate, err := units.RAMInBytes(v)
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 &blkiodev.ThrottleDevice{
Path: k,
Rate: uint64(rate),
}, nil
}
// ValidateThrottleIOpsDevice validates that the specified string has a valid device-rate format.
func ValidateThrottleIOpsDevice(val string) (*blkiodev.ThrottleDevice, error) {
k, v, ok := strings.Cut(val, ":")
if !ok || k == "" {
return nil, fmt.Errorf("bad format: %s", val)
}
// TODO(thaJeztah): should we really validate this on the client?
if !strings.HasPrefix(k, "/dev/") {
return nil, fmt.Errorf("bad format for device path: %s", val)
}
rate, err := strconv.ParseUint(v, 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)
}
return &blkiodev.ThrottleDevice{Path: k, Rate: rate}, nil
}
// ThrottledeviceOpt defines a map of ThrottleDevices
type ThrottledeviceOpt struct {
values []*blkiodev.ThrottleDevice
validator ValidatorThrottleFctType
}
// NewThrottledeviceOpt creates a new ThrottledeviceOpt
func NewThrottledeviceOpt(validator ValidatorThrottleFctType) ThrottledeviceOpt {
return ThrottledeviceOpt{
values: []*blkiodev.ThrottleDevice{},
validator: validator,
}
}
// Set validates a ThrottleDevice and sets its name as a key in ThrottledeviceOpt
func (opt *ThrottledeviceOpt) Set(val string) error {
var value *blkiodev.ThrottleDevice
if opt.validator != nil {
v, err := opt.validator(val)
if err != nil {
return err
}
value = v
}
opt.values = append(opt.values, value)
return nil
}
// String returns ThrottledeviceOpt values as a string.
func (opt *ThrottledeviceOpt) String() string {
out := make([]string, 0, len(opt.values))
for _, v := range opt.values {
out = append(out, v.String())
}
return fmt.Sprintf("%v", out)
}
// GetList returns a slice of pointers to ThrottleDevices.
func (opt *ThrottledeviceOpt) GetList() []*blkiodev.ThrottleDevice {
out := make([]*blkiodev.ThrottleDevice, 0, len(opt.values))
copy(out, opt.values)
return out
}
// Type returns the option type
func (opt *ThrottledeviceOpt) Type() string {
return "list"
}
|
