From 93cd3fad9f871c0e8f553d024546d82afcdd9f5b Mon Sep 17 00:00:00 2001
From: Steven Agbo <agbosteven@gmail.com>
Date: Fri, 16 Apr 2021 15:53:27 +0200
Subject: [PATCH] Add --inode-mode option

Signed-off-by: Steven Agbo <agbosteven@gmail.com>
---
 CHANGELOG.md |  5 +++++
 README.md    |  2 ++
 main.go      | 52 +++++++++++++++++++++++++++++++++++++++++-----------
 3 files changed, 48 insertions(+), 11 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2fb77e..aaee87a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
 
+## [0.6.0] - 2021-04-16
+
+### Added
+- Added --inode-mode option to monitore inode information instead of block usage (df -i)
+
 ## [0.4.2] - 2021-03-31
 
 ### Changed
diff --git a/README.md b/README.md
index ca0d275..70a407c 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ Flags:
   -p, --include-pseudo-fs         Include pseudo-filesystems (e.g. tmpfs) (default false)
   -r, --include-read-only         Include read-only filesystems (default false)
   -f, --fail-on-error             Fail and exit on errors getting file system usage (e.g. permission denied) (default false)
+  -j, --inode-mode                Inode mode, check usage of inode (default false)
   -h, --help                      help for check-disk-usage
 
 Use "check-disk-usage [command] --help" for more information about a command.
@@ -75,6 +76,7 @@ error, such as `permission denied` for a file system.  If true, the check will
 exit with as a critical failure and provide the error message.  If false (the
 defaut), it will specify unknown for that file system, provide the error and
 continue to check the remaining file systems as expected.
+* The `--inode-mode` option check inode information instead of block usage
 
 ## Configuration
 
diff --git a/main.go b/main.go
index d357412..0f82550 100644
--- a/main.go
+++ b/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"strings"
+    "strconv"
 
 	human "github.com/dustin/go-humanize"
 	"github.com/sensu-community/sensu-plugin-sdk/sensu"
@@ -22,6 +23,7 @@ type Config struct {
 	IncludePseudo   bool
 	IncludeReadOnly bool
 	FailOnError     bool
+    InodeMode       bool
 }
 
 var (
@@ -115,6 +117,16 @@ var (
 			Usage:     "Include read-only filesystems (default false)",
 			Value:     &plugin.IncludeReadOnly,
 		},
+		{
+			Path:      "inode-mode",
+			Env:       "",
+			Argument:  "inode-mode",
+			Shorthand: "j",
+			Default:   false,
+			Usage:     "Inode mode, check usage of inode (default false)",
+			Value:     &plugin.InodeMode,
+		},
+
 	}
 )
 
@@ -178,19 +190,37 @@ func executeCheck(event *types.Event) (int, error) {
 			continue
 		}
 
-		// implement magic factor for larger file systems?
-		fmt.Printf("%s ", plugin.PluginConfig.Name)
-		if s.UsedPercent >= plugin.Critical {
-			criticals++
-			fmt.Printf("CRITICAL: ")
-		} else if s.UsedPercent >= plugin.Warning {
-			warnings++
-			fmt.Printf(" WARNING: ")
+        if plugin.InodeMode {
+
+			// implement magic factor for larger file systems?
+			fmt.Printf("%s ", plugin.PluginConfig.Name)
+			if s.InodesUsedPercent >= plugin.Critical {
+				criticals++
+				fmt.Printf("CRITICAL: ")
+			} else if s.InodesUsedPercent >= plugin.Warning {
+				warnings++
+				fmt.Printf(" WARNING: ")
+			} else {
+				fmt.Printf("      OK: ")
+			}
+			fmt.Printf("%s %.2f%% - Total: %s, Used: %s, Free: %s\n", p.Mountpoint, s.InodesUsedPercent, strconv.FormatUint(s.InodesTotal, 10), strconv.FormatUint(s.InodesUsed, 10), strconv.FormatUint(s.InodesFree, 10))
 		} else {
-			fmt.Printf("      OK: ")
+
+			// implement magic factor for larger file systems?
+			fmt.Printf("%s ", plugin.PluginConfig.Name)
+			if s.UsedPercent >= plugin.Critical {
+				criticals++
+				fmt.Printf("CRITICAL: ")
+			} else if s.UsedPercent >= plugin.Warning {
+				warnings++
+				fmt.Printf(" WARNING: ")
+			} else {
+				fmt.Printf("      OK: ")
+			}
+			fmt.Printf("%s %.2f%% - Total: %s, Used: %s, Free: %s\n", p.Mountpoint, s.UsedPercent, human.Bytes(s.Total), human.Bytes(s.Used), human.Bytes(s.Free))
 		}
-		fmt.Printf("%s %.2f%% - Total: %s, Used: %s, Free: %s\n", p.Mountpoint, s.UsedPercent, human.Bytes(s.Total), human.Bytes(s.Used), human.Bytes(s.Free))
-	}
+
+    }
 
 	if criticals > 0 {
 		return sensu.CheckStateCritical, nil