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package util
import (
"errors"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/util/log"
"strconv"
"strings"
)
// MinFreeSpaceType is the type of MinFreeSpace.
type MinFreeSpaceType int
const (
// AsPercent set the MinFreeSpaceType to a percentage value from 0 to 100.
AsPercent MinFreeSpaceType = iota
// AsBytes set the MinFreeSpaceType to a absolute value bytes.
AsBytes
)
// MinFreeSpace is type that defines the limit for the minimum free space.
type MinFreeSpace struct {
Type MinFreeSpaceType
Bytes uint64
Percent float32
Raw string
}
// IsLow tells whether the free space is low or not.
func (s MinFreeSpace) IsLow(freeBytes uint64, freePercent float32) (yes bool, desc string) {
switch s.Type {
case AsPercent:
yes = freePercent < s.Percent
op := IfElse(yes, "<", ">=")
return yes, fmt.Sprintf("disk free %.2f%% %s required %.2f%%", freePercent, op, s.Percent)
case AsBytes:
yes = freeBytes < s.Bytes
op := IfElse(yes, "<", ">=")
return yes, fmt.Sprintf("disk free %s %s required %s",
BytesToHumanReadable(freeBytes), op, BytesToHumanReadable(s.Bytes))
}
return false, ""
}
// String returns a string representation of MinFreeSpace.
func (s MinFreeSpace) String() string {
switch s.Type {
case AsPercent:
return fmt.Sprintf("%.2f%%", s.Percent)
default:
return s.Raw
}
}
// MustParseMinFreeSpace parses comma-separated argument for min free space setting.
// minFreeSpace has the high priority than minFreeSpacePercent if it is set.
func MustParseMinFreeSpace(minFreeSpace string, minFreeSpacePercent string) (spaces []MinFreeSpace) {
ss := strings.Split(EmptyTo(minFreeSpace, minFreeSpacePercent), ",")
for _, freeString := range ss {
if vv, e := ParseMinFreeSpace(freeString); e == nil {
spaces = append(spaces, *vv)
} else {
log.Fatalf("The value specified in -minFreeSpace not a valid value %s", freeString)
}
}
return spaces
}
var ErrMinFreeSpaceBadValue = errors.New("minFreeSpace is invalid")
// ParseMinFreeSpace parses min free space expression s as percentage like 1,10 or human readable size like 10G
func ParseMinFreeSpace(s string) (*MinFreeSpace, error) {
if percent, e := strconv.ParseFloat(s, 32); e == nil {
if percent < 0 || percent > 100 {
return nil, ErrMinFreeSpaceBadValue
}
return &MinFreeSpace{Type: AsPercent, Percent: float32(percent), Raw: s}, nil
}
if directSize, e := ParseBytes(s); e == nil {
if directSize <= 100 {
return nil, ErrMinFreeSpaceBadValue
}
return &MinFreeSpace{Type: AsBytes, Bytes: directSize, Raw: s}, nil
}
return nil, ErrMinFreeSpaceBadValue
}
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