Fabian Reinartz
10 years ago
parent
7700cff1ff
commit
7d441abd7b
@ -0,0 +1,29 @@ |
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package prometheus |
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// Inline and byte-free variant of hash/fnv's fnv64a.
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const ( |
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offset64 = 14695981039346656037 |
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prime64 = 1099511628211 |
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) |
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// hashNew initializies a new fnv64a hash value.
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func hashNew() uint64 { |
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return offset64 |
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} |
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// hashAdd adds a string to a fnv64a hash value, returning the updated hash.
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func hashAdd(h uint64, s string) uint64 { |
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for i := 0; i < len(s); i++ { |
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h ^= uint64(s[i]) |
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h *= prime64 |
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} |
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return h |
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} |
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// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash.
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func hashAddByte(h uint64, b byte) uint64 { |
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h ^= uint64(b) |
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h *= prime64 |
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return h |
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} |
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@ -0,0 +1,6 @@ |
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ci: |
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! gofmt -l *.go | read nothing
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go vet
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go test -v ./...
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go get github.com/golang/lint/golint
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golint *.go
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@ -0,0 +1,138 @@ |
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package procfs |
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import ( |
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"fmt" |
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"io/ioutil" |
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"regexp" |
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"strconv" |
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"strings" |
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) |
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var ( |
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statuslineRE = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[[U_]+\]`) |
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buildlineRE = regexp.MustCompile(`\((\d+)/\d+\)`) |
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) |
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// MDStat holds info parsed from /proc/mdstat.
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type MDStat struct { |
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// Name of the device.
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Name string |
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// activity-state of the device.
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ActivityState string |
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// Number of active disks.
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DisksActive int64 |
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// Total number of disks the device consists of.
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DisksTotal int64 |
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// Number of blocks the device holds.
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BlocksTotal int64 |
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// Number of blocks on the device that are in sync.
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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.Path("mdstat") |
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content, err := ioutil.ReadFile(mdStatusFilePath) |
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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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} |
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mdStates := []MDStat{} |
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lines := strings.Split(string(content), "\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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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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} |
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mdName := mainLine[0] |
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activityState := mainLine[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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} |
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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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} |
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// j is the line number of the syncing-line.
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j := 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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} |
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// If device is 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 err != nil { |
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return mdStates, fmt.Errorf("error parsing %s: %s", mdStatusFilePath, err) |
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} |
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} |
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mdStates = append(mdStates, MDStat{ |
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Name: mdName, |
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ActivityState: activityState, |
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DisksActive: active, |
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DisksTotal: total, |
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BlocksTotal: size, |
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BlocksSynced: syncedBlocks, |
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}) |
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} |
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return mdStates, nil |
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} |
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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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} |
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size, err = strconv.ParseInt(matches[1], 10, 64) |
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if err != nil { |
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return 0, 0, 0, fmt.Errorf("unexpected statusline %s: %s", statusline, err) |
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} |
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total, err = strconv.ParseInt(matches[2], 10, 64) |
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if err != nil { |
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return 0, 0, 0, fmt.Errorf("unexpected statusline %s: %s", statusline, err) |
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} |
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active, err = strconv.ParseInt(matches[3], 10, 64) |
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if err != nil { |
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return 0, 0, 0, fmt.Errorf("unexpected statusline %s: %s", statusline, err) |
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} |
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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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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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} |
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syncedBlocks, err = strconv.ParseInt(matches[1], 10, 64) |
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if err != nil { |
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return 0, fmt.Errorf("%s in buildline: %s", err, buildline) |
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} |
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return syncedBlocks, nil |
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} |
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