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config.go
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/
config.go
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//
// (C) Copyright 2019-2020 Intel Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// GOVERNMENT LICENSE RIGHTS-OPEN SOURCE SOFTWARE
// The Government's rights to use, modify, reproduce, release, perform, display,
// or disclose this software are subject to the terms of the Apache License as
// provided in Contract No. 8F-30005.
// Any reproduction of computer software, computer software documentation, or
// portions thereof marked with this legend must also reproduce the markings.
//
package storage
import "github.com/pkg/errors"
const (
maxScmDeviceLen = 1
)
const (
ScmClassNone ScmClass = ""
ScmClassDCPM ScmClass = "dcpm"
ScmClassRAM ScmClass = "ram"
)
// ScmClass specifies device type for Storage Class Memory
type ScmClass string
// UnmarshalYAML implements yaml.Unmarshaler on ScmClass type
func (s *ScmClass) UnmarshalYAML(unmarshal func(interface{}) error) error {
var class string
if err := unmarshal(&class); err != nil {
return err
}
scmClass := ScmClass(class)
switch scmClass {
case ScmClassDCPM, ScmClassRAM:
*s = scmClass
default:
return errors.Errorf("scm_class value %q not supported in config (dcpm/ram)", scmClass)
}
return nil
}
func (s ScmClass) String() string {
return string(s)
}
// ScmConfig represents a SCM (Storage Class Memory) configuration entry.
type ScmConfig struct {
MountPoint string `yaml:"scm_mount,omitempty" cmdLongFlag:"--storage" cmdShortFlag:"-s"`
Class ScmClass `yaml:"scm_class,omitempty"`
RamdiskSize int `yaml:"scm_size,omitempty"`
DeviceList []string `yaml:"scm_list,omitempty"`
}
func (sc *ScmConfig) Validate() error {
if sc.MountPoint == "" {
return errors.New("no scm_mount set")
}
switch sc.Class {
case ScmClassDCPM:
if sc.RamdiskSize > 0 {
return errors.New("scm_size may not be set when scm_class is dcpm")
}
if len(sc.DeviceList) == 0 {
return errors.New("scm_list must be set when scm_class is dcpm")
}
case ScmClassRAM:
if sc.RamdiskSize == 0 {
return errors.New("scm_size may not be unset or 0 when scm_class is ram")
}
if len(sc.DeviceList) > 0 {
return errors.New("scm_list may not be set when scm_class is ram")
}
case ScmClassNone:
return errors.New("scm_class not set")
}
if len(sc.DeviceList) > maxScmDeviceLen {
return errors.Errorf("scm_list may have at most %d devices", maxScmDeviceLen)
}
return nil
}
const (
BdevClassNone BdevClass = ""
BdevClassNvme BdevClass = "nvme"
BdevClassMalloc BdevClass = "malloc"
BdevClassKdev BdevClass = "kdev"
BdevClassFile BdevClass = "file"
)
// BdevClass specifies block device type for block device storage
type BdevClass string
// UnmarshalYAML implements yaml.Unmarshaler on BdevClass type
func (b *BdevClass) UnmarshalYAML(unmarshal func(interface{}) error) error {
var class string
if err := unmarshal(&class); err != nil {
return err
}
bdevClass := BdevClass(class)
switch bdevClass {
// NB: It seems as if this is a valid default; configs generated by the test
// harness have no bdev entries and are expected to work.
case BdevClassNone:
*b = BdevClassNvme
case BdevClassNvme, BdevClassMalloc, BdevClassKdev, BdevClassFile:
*b = bdevClass
default:
return errors.Errorf("bdev_class value %q not supported in config (nvme/malloc/kdev/file)", bdevClass)
}
return nil
}
func (b BdevClass) String() string {
return string(b)
}
// BdevConfig represents a Block Device (NVMe, etc.) configuration entry.
type BdevConfig struct {
ConfigPath string `yaml:"-" cmdLongFlag:"--nvme" cmdShortFlag:"-n"`
Class BdevClass `yaml:"bdev_class,omitempty"`
DeviceList []string `yaml:"bdev_list,omitempty"`
DeviceCount int `yaml:"bdev_number,omitempty"`
FileSize int `yaml:"bdev_size,omitempty"`
ShmID int `yaml:"-" cmdLongFlag:"--shm_id,nonzero" cmdShortFlag:"-i,nonzero"`
MemSize int `yaml:"-" cmdLongFlag:"--mem_size,nonzero" cmdShortFlag:"-r,nonzero"`
VosEnv string `yaml:"-" cmdEnv:"VOS_BDEV_CLASS"`
Hostname string `yaml:"-"` // used when generating templates
}
func (bc *BdevConfig) Validate() error {
return nil
}
func (bc *BdevConfig) GetNvmeDevs() []string {
if bc.Class == BdevClassNvme {
return bc.DeviceList
}
return []string{}
}