Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/inputs/slab/slab.go

@@ -0,0 +1,113 @@
+//go:generate ../../../tools/readme_config_includer/generator
+//go:build linux
+
+package slab
+
+import (
+	"bufio"
+	"bytes"
+	_ "embed"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/plugins/inputs"
+)
+
+//go:embed sample.conf
+var sampleConfig string
+
+type Slab struct {
+	Log telegraf.Logger `toml:"-"`
+
+	statFile string
+	useSudo  bool
+}
+
+func (*Slab) SampleConfig() string {
+	return sampleConfig
+}
+
+func (ss *Slab) Gather(acc telegraf.Accumulator) error {
+	fields, err := ss.getSlabStats()
+	if err != nil {
+		return err
+	}
+
+	acc.AddGauge("slab", fields, nil)
+	return nil
+}
+
+func (ss *Slab) getSlabStats() (map[string]interface{}, error) {
+	out, err := ss.runCmd("/bin/cat", []string{ss.statFile})
+	if err != nil {
+		return nil, err
+	}
+
+	bytesReader := bytes.NewReader(out)
+	scanner := bufio.NewScanner(bytesReader)
+
+	// Read header rows
+	scanner.Scan() // for "slabinfo - version: 2.1"
+	scanner.Scan() // for "# name <active_objs> <num_objs> <objsize> ..."
+
+	fields := make(map[string]interface{})
+	// Read data rows
+	for scanner.Scan() {
+		line := scanner.Text()
+		cols := strings.Fields(line)
+
+		if len(cols) < 4 {
+			return nil, errors.New("the content of /proc/slabinfo is invalid")
+		}
+
+		var numObj, sizObj int
+
+		numObj, err = strconv.Atoi(cols[2])
+		if err != nil {
+			return nil, err
+		}
+
+		sizObj, err = strconv.Atoi(cols[3])
+		if err != nil {
+			return nil, err
+		}
+
+		fields[normalizeName(cols[0])] = numObj * sizObj
+	}
+	return fields, nil
+}
+
+func (ss *Slab) runCmd(cmd string, args []string) ([]byte, error) {
+	execCmd := exec.Command(cmd, args...)
+	if os.Geteuid() != 0 && ss.useSudo {
+		execCmd = exec.Command("sudo", append([]string{"-n", cmd}, args...)...)
+	}
+
+	out, err := internal.StdOutputTimeout(execCmd, 5*time.Second)
+	if err != nil {
+		return nil, fmt.Errorf("failed to run command %q: %w - %v", execCmd.Args, err, out)
+	}
+
+	return out, nil
+}
+
+func normalizeName(name string) string {
+	return strings.ReplaceAll(strings.ToLower(name), "-", "_") + "_size"
+}
+
+func init() {
+	inputs.Add("slab", func() telegraf.Input {
+		return &Slab{
+			statFile: path.Join(internal.GetProcPath(), "slabinfo"),
+			useSudo:  true,
+		}
+	})
+}