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// SPDX-License-Identifier: GPL-3.0-or-later
package lvm
import (
"encoding/json"
"fmt"
"strconv"
)
type lvsReport struct {
Report []struct {
Lv []struct {
VGName string `json:"vg_name"`
LVName string `json:"lv_name"`
LVSize string `json:"lv_size"`
DataPercent string `json:"data_percent"`
MetadataPercent string `json:"metadata_percent"`
LVAttr string `json:"lv_attr"`
} `json:"lv"`
} `json:"report"`
}
func (l *LVM) collect() (map[string]int64, error) {
bs, err := l.exec.lvsReportJson()
if err != nil {
return nil, err
}
var report lvsReport
if err = json.Unmarshal(bs, &report); err != nil {
return nil, err
}
mx := make(map[string]int64)
for _, r := range report.Report {
for _, lv := range r.Lv {
if lv.VGName == "" || lv.LVName == "" {
continue
}
if !isThinPool(lv.LVAttr) {
l.Debugf("skipping lv '%s' vg '%s': not a thin pool", lv.LVName, lv.VGName)
continue
}
key := fmt.Sprintf("lv_%s_vg_%s", lv.LVName, lv.VGName)
if !l.lvmThinPools[key] {
l.addLVMThinPoolCharts(lv.LVName, lv.VGName)
l.lvmThinPools[key] = true
}
if v, ok := parseFloat(lv.DataPercent); ok {
mx[key+"_data_percent"] = int64(v * 100)
}
if v, ok := parseFloat(lv.MetadataPercent); ok {
mx[key+"_metadata_percent"] = int64(v * 100)
}
}
}
return mx, nil
}
func isThinPool(lvAttr string) bool {
return getLVType(lvAttr) == "thin_pool"
}
func getLVType(lvAttr string) string {
if len(lvAttr) == 0 {
return ""
}
// https://man7.org/linux/man-pages/man8/lvs.8.html#NOTES
switch lvAttr[0] {
case 'C':
return "cache"
case 'm':
return "mirrored"
case 'M':
return "mirrored_without_initial_sync"
case 'o':
return "origin"
case 'O':
return "origin_with_merging_snapshot"
case 'g':
return "integrity"
case 'r':
return "raid"
case 'R':
return "raid_without_initial_sync"
case 's':
return "snapshot"
case 'S':
return "merging_snapshot"
case 'p':
return "pvmove"
case 'v':
return "virtual"
case 'i':
return "mirror_or_raid_image"
case 'I':
return "mirror_or_raid_mage_out_of_sync"
case 'l':
return "log_device"
case 'c':
return "under_conversion"
case 'V':
return "thin_volume"
case 't':
return "thin_pool"
case 'T':
return "thin_pool_data"
case 'd':
return "vdo_pool"
case 'D':
return "vdo_pool_data"
case 'e':
return "raid_or_pool_metadata"
default:
return ""
}
}
func parseFloat(s string) (float64, bool) {
if s == "-" {
return 0, false
}
v, err := strconv.ParseFloat(s, 64)
return v, err == nil
}
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