Add check_disk option to add inode numbers into perfdata (#9494)

doc/10-icinga-template-library.md

@@ -377,6 +377,7 @@ disk\_timeout             | **Optional.** Seconds before connection times out (d
 disk\_units               | **Optional.** Choose bytes, kB, MB, GB, TB (default: MB).
 disk\_exclude\_type       | **Optional.** Ignore all filesystems of indicated type. Multiple regular expression strings must be defined as array. Defaults to "none", "tmpfs", "sysfs", "proc", "configfs", "devtmpfs", "devfs", "mtmfs", "tracefs", "cgroup", "fuse.gvfsd-fuse", "fuse.gvfs-fuse-daemon", "fdescfs", "overlay", "nsfs", "squashfs".
 disk\_include\_type       | **Optional.** Check only filesystems of indicated type. Multiple regular expression strings must be defined as array.
+disk\_inode\_perfdata     | **Optional.** Display inode usage in perfdata
 
 ### disk_smb <a id="plugin-check-command-disk-smb"></a>
 

itl/command-plugins.conf

@@ -1364,6 +1364,10 @@ object CheckCommand "disk" {
 			description = "Exit with CRITICAL status if less than PERCENT of inode space is free"
 			order = -3
 		}
+		"-P" = {
+			description = "Display inode usage in perfdata"
+			set_if = "$disk_inode_perfdata$"
+		}
 		"-p" = {
 			value = "$disk_partitions$"
 			description = "Path or partition (may be repeated)"