Add filesystem read-only metric node_filesystem_readonly

This is a boolean metric which is set to 1 when the filesystem is flagged as
read-only.

1 files changed, 7 insertions, 0 deletions

diff --git a/collector/filesystem_bsd.go b/collector/filesystem_bsd.go
index 6aefb01..9daa899 100644
--- a/collector/filesystem_bsd.go
+++ b/collector/filesystem_bsd.go
@@ -33,6 +33,7 @@ import "C"
 
 const (
         defIgnoredMountPoints = "^/(dev)($|/)"
+        MNT_RDONLY            = 0x1
 )
 
 // Expose filesystem fullness.
@@ -55,6 +56,11 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
                 device := C.GoString(&mnt[i].f_mntfromname[0])
                 fstype := C.GoString(&mnt[i].f_fstypename[0])
 
+                var ro float64
+                if mnt[i].f_flags & MNT_RDONLY {
+                        ro = 1
+                }
+
                 labelValues := []string{device, mountpoint, fstype}
                 stats = append(stats, filesystemStats{
                         labelValues: labelValues,
@@ -63,6 +69,7 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
                         avail:       float64(mnt[i].f_bavail) * float64(mnt[i].f_bsize),
                         files:       float64(mnt[i].f_files),
                         filesFree:   float64(mnt[i].f_ffree),
+                        ro:          ro,
                 })
         }
         return stats, nil