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// SPDX-License-Identifier: GPL-3.0-or-later
package zfspool
import (
"bufio"
"bytes"
"fmt"
"strconv"
"strings"
)
var zpoolHealthStates = []string{
"online",
"degraded",
"faulted",
"offline",
"removed",
"unavail",
"suspended",
}
type zpoolStats struct {
name string
sizeBytes string
allocBytes string
freeBytes string
fragPerc string
capPerc string
dedupRatio string
health string
}
func (z *ZFSPool) collect() (map[string]int64, error) {
bs, err := z.exec.list()
if err != nil {
return nil, err
}
zpools, err := parseZpoolListOutput(bs)
if err != nil {
return nil, err
}
mx := make(map[string]int64)
z.collectZpoolListStats(mx, zpools)
return mx, nil
}
func (z *ZFSPool) collectZpoolListStats(mx map[string]int64, zpools []zpoolStats) {
seen := make(map[string]bool)
for _, zpool := range zpools {
seen[zpool.name] = true
if !z.zpools[zpool.name] {
z.addZpoolCharts(zpool.name)
z.zpools[zpool.name] = true
}
px := "zpool_" + zpool.name + "_"
if v, ok := parseInt(zpool.sizeBytes); ok {
mx[px+"size"] = v
}
if v, ok := parseInt(zpool.freeBytes); ok {
mx[px+"free"] = v
}
if v, ok := parseInt(zpool.allocBytes); ok {
mx[px+"alloc"] = v
}
if v, ok := parseFloat(zpool.capPerc); ok {
mx[px+"cap"] = int64(v)
}
if v, ok := parseFloat(zpool.fragPerc); ok {
mx[px+"frag"] = int64(v)
}
for _, s := range zpoolHealthStates {
mx[px+"health_state_"+s] = 0
}
mx[px+"health_state_"+zpool.health] = 1
}
for name := range z.zpools {
if !seen[name] {
z.removeZpoolCharts(name)
delete(z.zpools, name)
}
}
}
func parseZpoolListOutput(bs []byte) ([]zpoolStats, error) {
var lines []string
sc := bufio.NewScanner(bytes.NewReader(bs))
for sc.Scan() {
if text := strings.TrimSpace(sc.Text()); text != "" {
lines = append(lines, text)
}
}
if len(lines) < 2 {
return nil, fmt.Errorf("unexpected data: wanted >= 2 lines, got %d", len(lines))
}
headers := strings.Fields(lines[0])
if len(headers) == 0 {
return nil, fmt.Errorf("unexpected data: missing headers")
}
var zpools []zpoolStats
/*
# zpool list -p
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
rpool 21367462298 9051643576 12240656794 - 33 42 1.00 ONLINE -
zion - - - - - - - FAULTED -
*/
for _, line := range lines[1:] {
values := strings.Fields(line)
if len(values) != len(headers) {
return nil, fmt.Errorf("unequal columns: headers(%d) != values(%d)", len(headers), len(values))
}
var zpool zpoolStats
for i, v := range values {
v = strings.TrimSpace(v)
switch strings.ToLower(headers[i]) {
case "name":
zpool.name = v
case "size":
zpool.sizeBytes = v
case "alloc":
zpool.allocBytes = v
case "free":
zpool.freeBytes = v
case "frag":
zpool.fragPerc = v
case "cap":
zpool.capPerc = v
case "dedup":
zpool.dedupRatio = v
case "health":
zpool.health = strings.ToLower(v)
}
if last := i+1 == len(headers); last && zpool.name != "" && zpool.health != "" {
zpools = append(zpools, zpool)
}
}
}
if len(zpools) == 0 {
return nil, fmt.Errorf("unexpected data: missing pools")
}
return zpools, nil
}
func parseInt(s string) (int64, bool) {
if s == "-" {
return 0, false
}
v, err := strconv.ParseInt(s, 10, 64)
return v, err == nil
}
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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