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@ -42,64 +42,64 @@ type MDStat struct {
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BlocksSynced int64
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}
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// ParseMDStat parses an mdstat-file and returns a struct with the relevant infos.
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func (fs FS) ParseMDStat() (mdstates []MDStat, err error) {
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mdStatusFilePath := fs.proc.Path("mdstat")
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content, err := ioutil.ReadFile(mdStatusFilePath)
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// MDStat parses an mdstat-file (/proc/mdstat) and returns a slice of
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// structs containing the relevant info. More information available here:
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// https://raid.wiki.kernel.org/index.php/Mdstat
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func (fs FS) MDStat() ([]MDStat, error) {
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data, err := ioutil.ReadFile(fs.proc.Path("mdstat"))
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if err != nil {
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return []MDStat{}, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err)
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return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err)
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}
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mdstat, err := parseMDStat(data)
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if err != nil {
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return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err)
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}
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return mdstat, nil
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}
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mdStates := []MDStat{}
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lines := strings.Split(string(content), "\n")
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// parseMDStat parses data from mdstat file (/proc/mdstat) and returns a slice of
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// structs containing the relevant info.
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func parseMDStat(mdstatData []byte) ([]MDStat, error) {
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mdStats := []MDStat{}
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lines := strings.Split(string(mdstatData), "\n")
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for i, l := range lines {
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if l == "" {
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continue
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}
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if l[0] == ' ' {
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continue
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}
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if strings.HasPrefix(l, "Personalities") || strings.HasPrefix(l, "unused") {
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if strings.TrimSpace(l) == "" || l[0] == ' ' ||
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strings.HasPrefix(l, "Personalities") || strings.HasPrefix(l, "unused") {
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continue
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}
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mainLine := strings.Split(l, " ")
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if len(mainLine) < 3 {
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return mdStates, fmt.Errorf("error parsing mdline: %s", l)
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deviceFields := strings.Fields(l)
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if len(deviceFields) < 3 {
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return nil, fmt.Errorf("not enough fields in mdline (expected at least 3): %s", l)
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}
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mdName := mainLine[0]
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activityState := mainLine[2]
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mdName := deviceFields[0]
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activityState := deviceFields[2]
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if len(lines) <= i+3 {
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return mdStates, fmt.Errorf(
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"error parsing %s: too few lines for md device %s",
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mdStatusFilePath,
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mdName,
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)
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return mdStats, fmt.Errorf("missing lines for md device %s", mdName)
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}
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active, total, size, err := evalStatusline(lines[i+1])
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active, total, size, err := evalStatusLine(lines[i+1])
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if err != nil {
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return mdStates, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err)
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return nil, err
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}
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// j is the line number of the syncing-line.
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j := i + 2
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syncLineIdx := i + 2
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if strings.Contains(lines[i+2], "bitmap") { // skip bitmap line
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j = i + 3
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syncLineIdx++
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}
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// If device is syncing at the moment, get the number of currently
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// If device is recovering/syncing at the moment, get the number of currently
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// synced bytes, otherwise that number equals the size of the device.
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syncedBlocks := size
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if strings.Contains(lines[j], "recovery") || strings.Contains(lines[j], "resync") {
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syncedBlocks, err = evalBuildline(lines[j])
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if strings.Contains(lines[syncLineIdx], "recovery") || strings.Contains(lines[syncLineIdx], "resync") {
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syncedBlocks, err = evalRecoveryLine(lines[syncLineIdx])
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if err != nil {
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return mdStates, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err)
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return nil, err
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}
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}
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mdStates = append(mdStates, MDStat{
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mdStats = append(mdStats, MDStat{
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Name: mdName,
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ActivityState: activityState,
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DisksActive: active,
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@ -109,10 +109,10 @@ func (fs FS) ParseMDStat() (mdstates []MDStat, err error) {
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})
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}
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return mdStates, nil
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return mdStats, nil
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}
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func evalStatusline(statusline string) (active, total, size int64, err error) {
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func evalStatusLine(statusline string) (active, total, size int64, err error) {
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matches := statuslineRE.FindStringSubmatch(statusline)
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if len(matches) != 4 {
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return 0, 0, 0, fmt.Errorf("unexpected statusline: %s", statusline)
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@ -136,7 +136,7 @@ func evalStatusline(statusline string) (active, total, size int64, err error) {
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return active, total, size, nil
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}
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func evalBuildline(buildline string) (syncedBlocks int64, err error) {
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func evalRecoveryLine(buildline string) (syncedBlocks int64, err error) {
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matches := buildlineRE.FindStringSubmatch(buildline)
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if len(matches) != 2 {
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return 0, fmt.Errorf("unexpected buildline: %s", buildline)
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Paul Gier
6 years ago
committed by