MODE parameter specified with UDEV rule does not work.

Issue

• Specifying the parameter "MODE=0600" for non-root user does not work.

• For example : When group is set to root, then the permissions are getting set correctly. Else the permissions are taken as 660

  • Udev rule is configured as

    ENV{DM_VG_NAME}=="testvg", OWNER:="myuser", GROUP:="mygroup", MODE:="600"
    

  Result after reloading the udev rules with udevadm control --reload-rules ; start_udev

      ll /dev/dm-7 
      brw-rw---- 1 myuser mygroup 253, 7 Sep 19 10:31 /dev/dm-7
  

  • Same rule with the user as root

    ENV{DM_VG_NAME}=="testvg", OWNER:="myuser", GROUP:="root", MODE:="600"
    

    Reload the rule and check

    ll /dev/dm-7 
    brw------- 1 myuser root 253, 7 Sep 19 10:32 /dev/dm-7
    

  • Device details

    # dmsetup info -c
    testvg-lv1   253   7 L--w    1    1   0 LVM-HF1Ad7tXFUP2WSdGPulhH9EhCagNa8dibGs5BKbO8j8RgoGOajCv2cf3qForvbO9
    
    # pvs ; vgs ; lvs
      PV                   VG             Fmt  Attr PSize   PFree
      /dev/mapper/mpathnp1 testvg         lvm2 a--    1.01g 8.00m
    
      VG             #PV #LV #SN Attr   VSize   VFree
      testvg           1   1   0 wz--n-   1.01g 8.00m
    
      LV       VG             Attr       LSize   Pool Origin Data%  Move Log Cpy%Sync Convert
      lv1      testvg         -wi-a----   1.00g