Adding upstream version 1.34.4.

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

plugins/inputs/linux_sysctl_fs/README.md

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+# Linux Sysctl Filesystem Input Plugin
+
+This plugin gathers metrics by reading the [system filesystem][sysfs] files on
+[Linux][kernel] systems.
+
+⭐ Telegraf v1.24.0
+🏷️ system
+💻 linux
+
+[kernel]: https://kernel.org/
+[sysfs]: https://www.kernel.org/doc/Documentation/sysctl/fs.txt
+
+## Global configuration options <!-- @/docs/includes/plugin_config.md -->
+
+In addition to the plugin-specific configuration settings, plugins support
+additional global and plugin configuration settings. These settings are used to
+modify metrics, tags, and field or create aliases and configure ordering, etc.
+See the [CONFIGURATION.md][CONFIGURATION.md] for more details.
+
+[CONFIGURATION.md]: ../../../docs/CONFIGURATION.md#plugins
+
+## Configuration
+
+```toml @sample.conf
+# Provides Linux sysctl fs metrics
+[[inputs.linux_sysctl_fs]]
+  # no configuration
+```
+
+## Metrics
+
+`linux_sysctl_fs` metric:
+
+- tags: _none_
+- fields:
+  - `aio-max-nr` (unsigned integer)
+  - `aio-nr` (unsigned integer)
+  - `dentry-age-limit` (unsigned integer)
+  - `dentry-nr` (unsigned integer)
+  - `dentry-unused-nr` (unsigned integer)
+  - `dentry-want-pages` (unsigned integer)
+  - `dquot-max` (unsigned integer)
+  - `dquot-nr` (unsigned integer)
+  - `inode-free-nr` (unsigned integer)
+  - `inode-nr` (unsigned integer)
+  - `inode-preshrink-nr` (unsigned integer)
+  - `super-max` (unsigned integer)
+  - `super-nr` (unsigned integer)
+  - `file-max` (unsigned integer)
+  - `file-nr` (unsigned integer)
+
+## Example Output
+
+```text
+> linux_sysctl_fs,host=foo dentry-want-pages=0i,file-max=44222i,aio-max-nr=65536i,inode-preshrink-nr=0i,dentry-nr=64340i,dentry-unused-nr=55274i,file-nr=1568i,aio-nr=0i,inode-nr=35952i,inode-free-nr=12957i,dentry-age-limit=45i 1490982022000000000
+```

plugins/inputs/linux_sysctl_fs/linux_sysctl_fs.go

@@ -0,0 +1,109 @@
+//go:generate ../../../tools/readme_config_includer/generator
+package linux_sysctl_fs
+
+import (
+	"bytes"
+	_ "embed"
+	"errors"
+	"os"
+	"path"
+	"strconv"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/internal"
+	"github.com/influxdata/telegraf/plugins/inputs"
+)
+
+//go:embed sample.conf
+var sampleConfig string
+
+// https://www.kernel.org/doc/Documentation/sysctl/fs.txt
+type SysctlFS struct {
+	path string
+}
+
+func (*SysctlFS) SampleConfig() string {
+	return sampleConfig
+}
+
+func (sfs *SysctlFS) Gather(acc telegraf.Accumulator) error {
+	fields := make(map[string]interface{})
+
+	for _, n := range []string{"aio-nr", "aio-max-nr", "dquot-nr", "dquot-max", "super-nr", "super-max"} {
+		if err := sfs.gatherOne(n, fields); err != nil {
+			return err
+		}
+	}
+
+	err := sfs.gatherList("inode-state", fields, "inode-nr", "inode-free-nr", "inode-preshrink-nr")
+	if err != nil {
+		return err
+	}
+	err = sfs.gatherList("dentry-state", fields, "dentry-nr", "dentry-unused-nr", "dentry-age-limit", "dentry-want-pages")
+	if err != nil {
+		return err
+	}
+	err = sfs.gatherList("file-nr", fields, "file-nr", "", "file-max")
+	if err != nil {
+		return err
+	}
+
+	acc.AddFields("linux_sysctl_fs", fields, nil)
+	return nil
+}
+
+func (sfs *SysctlFS) gatherList(file string, fields map[string]interface{}, fieldNames ...string) error {
+	bs, err := os.ReadFile(sfs.path + "/" + file)
+	if err != nil {
+		// Ignore non-existing entries
+		if errors.Is(err, os.ErrNotExist) {
+			return nil
+		}
+		return err
+	}
+
+	bsplit := bytes.Split(bytes.TrimRight(bs, "\n"), []byte{'\t'})
+	for i, name := range fieldNames {
+		if i >= len(bsplit) {
+			break
+		}
+		if name == "" {
+			continue
+		}
+
+		v, err := strconv.ParseUint(string(bsplit[i]), 10, 64)
+		if err != nil {
+			return err
+		}
+		fields[name] = v
+	}
+
+	return nil
+}
+
+func (sfs *SysctlFS) gatherOne(name string, fields map[string]interface{}) error {
+	bs, err := os.ReadFile(sfs.path + "/" + name)
+	if err != nil {
+		// Ignore non-existing entries
+		if errors.Is(err, os.ErrNotExist) {
+			return nil
+		}
+		return err
+	}
+
+	v, err := strconv.ParseUint(string(bytes.TrimRight(bs, "\n")), 10, 64)
+	if err != nil {
+		return err
+	}
+
+	fields[name] = v
+	return nil
+}
+
+func init() {
+	inputs.Add("linux_sysctl_fs", func() telegraf.Input {
+		return &SysctlFS{
+			path: path.Join(internal.GetProcPath(), "/sys/fs"),
+		}
+	})
+}

plugins/inputs/linux_sysctl_fs/linux_sysctl_fs_test.go

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+package linux_sysctl_fs
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/influxdata/telegraf/testutil"
+)
+
+func TestSysctlFSGather(t *testing.T) {
+	td := t.TempDir()
+
+	require.NoError(t, os.WriteFile(td+"/aio-nr", []byte("100\n"), 0640))
+	require.NoError(t, os.WriteFile(td+"/aio-max-nr", []byte("101\n"), 0640))
+	require.NoError(t, os.WriteFile(td+"/super-nr", []byte("102\n"), 0640))
+	require.NoError(t, os.WriteFile(td+"/super-max", []byte("103\n"), 0640))
+	require.NoError(t, os.WriteFile(td+"/file-nr", []byte("104\t0\t106\n"), 0640))
+	require.NoError(t, os.WriteFile(td+"/inode-state", []byte("107\t108\t109\t0\t0\t0\t0\n"), 0640))
+
+	sfs := &SysctlFS{
+		path: td,
+	}
+	var acc testutil.Accumulator
+	require.NoError(t, sfs.Gather(&acc))
+
+	acc.AssertContainsFields(t, "linux_sysctl_fs", map[string]interface{}{
+		"aio-nr":             uint64(100),
+		"aio-max-nr":         uint64(101),
+		"super-nr":           uint64(102),
+		"super-max":          uint64(103),
+		"file-nr":            uint64(104),
+		"file-max":           uint64(106),
+		"inode-nr":           uint64(107),
+		"inode-free-nr":      uint64(108),
+		"inode-preshrink-nr": uint64(109),
+	})
+}

plugins/inputs/linux_sysctl_fs/sample.conf

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+# Provides Linux sysctl fs metrics
+[[inputs.linux_sysctl_fs]]
+  # no configuration