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108 lines
3.3 KiB
Go
108 lines
3.3 KiB
Go
package opts
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/docker/engine-api/types/blkiodev"
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"github.com/docker/go-units"
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)
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// ValidatorThrottleFctType defines a validator function that returns a validated struct and/or an error.
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type ValidatorThrottleFctType func(val string) (*blkiodev.ThrottleDevice, error)
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// ValidateThrottleBpsDevice validates that the specified string has a valid device-rate format.
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func ValidateThrottleBpsDevice(val string) (*blkiodev.ThrottleDevice, error) {
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split := strings.SplitN(val, ":", 2)
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if len(split) != 2 {
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return nil, fmt.Errorf("bad format: %s", val)
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}
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if !strings.HasPrefix(split[0], "/dev/") {
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return nil, fmt.Errorf("bad format for device path: %s", val)
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}
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rate, err := units.RAMInBytes(split[1])
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if err != nil {
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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)
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}
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if rate < 0 {
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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)
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}
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return &blkiodev.ThrottleDevice{
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Path: split[0],
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Rate: uint64(rate),
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}, nil
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}
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// ValidateThrottleIOpsDevice validates that the specified string has a valid device-rate format.
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func ValidateThrottleIOpsDevice(val string) (*blkiodev.ThrottleDevice, error) {
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split := strings.SplitN(val, ":", 2)
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if len(split) != 2 {
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return nil, fmt.Errorf("bad format: %s", val)
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}
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if !strings.HasPrefix(split[0], "/dev/") {
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return nil, fmt.Errorf("bad format for device path: %s", val)
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}
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rate, err := strconv.ParseUint(split[1], 10, 64)
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if err != nil {
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return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
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}
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if rate < 0 {
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return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
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}
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return &blkiodev.ThrottleDevice{
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Path: split[0],
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Rate: uint64(rate),
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}, nil
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}
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// ThrottledeviceOpt defines a map of ThrottleDevices
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type ThrottledeviceOpt struct {
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values []*blkiodev.ThrottleDevice
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validator ValidatorThrottleFctType
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}
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// NewThrottledeviceOpt creates a new ThrottledeviceOpt
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func NewThrottledeviceOpt(validator ValidatorThrottleFctType) ThrottledeviceOpt {
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values := []*blkiodev.ThrottleDevice{}
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return ThrottledeviceOpt{
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values: values,
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validator: validator,
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}
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}
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// Set validates a ThrottleDevice and sets its name as a key in ThrottledeviceOpt
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func (opt *ThrottledeviceOpt) Set(val string) error {
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var value *blkiodev.ThrottleDevice
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if opt.validator != nil {
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v, err := opt.validator(val)
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if err != nil {
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return err
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}
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value = v
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}
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(opt.values) = append((opt.values), value)
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return nil
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}
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// String returns ThrottledeviceOpt values as a string.
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func (opt *ThrottledeviceOpt) String() string {
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var out []string
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for _, v := range opt.values {
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out = append(out, v.String())
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}
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return fmt.Sprintf("%v", out)
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}
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// GetList returns a slice of pointers to ThrottleDevices.
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func (opt *ThrottledeviceOpt) GetList() []*blkiodev.ThrottleDevice {
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var throttledevice []*blkiodev.ThrottleDevice
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for _, v := range opt.values {
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throttledevice = append(throttledevice, v)
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}
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return throttledevice
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}
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