root@node-10-157-128-19:/etc/init# udevadm trigger --action=add --verbose | fgrep tun
/sys/devices/virtual/misc/tun
root@node-10-157-128-19:/etc/init# udevadm test --action=add /sys/devices/virtual/misc/tun
calling: test
version 204
This program is for debugging only, it does not run any program
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.

=== trie on-disk ===
tool version:          204
file size:         5660180 bytes
header size             80 bytes
strings            1265196 bytes
nodes              4394904 bytes
load module index
read rules file: /lib/udev/rules.d/40-bridge-network-interface.rules
read rules file: /lib/udev/rules.d/40-crda.rules
read rules file: /lib/udev/rules.d/40-gnupg.rules
read rules file: /lib/udev/rules.d/40-hyperv-hotadd.rules
read rules file: /lib/udev/rules.d/40-qemu-system-common.rules
read rules file: /lib/udev/rules.d/40-vlan-network-interface.rules
read rules file: /lib/udev/rules.d/42-usb-hid-pm.rules
read rules file: /lib/udev/rules.d/50-firmware.rules
read rules file: /lib/udev/rules.d/50-rbd.rules
read rules file: /lib/udev/rules.d/50-udev-default.rules
read rules file: /lib/udev/rules.d/51-ocfs2.rules
read rules file: /lib/udev/rules.d/51-use-deadline-not-cfq.rules
read rules file: /lib/udev/rules.d/55-dm.rules
read rules file: /lib/udev/rules.d/56-lvm.rules
read rules file: /lib/udev/rules.d/60-cdrom_id.rules
read rules file: /lib/udev/rules.d/60-ceph-partuuid-workaround.rules
read rules file: /lib/udev/rules.d/60-keyboard.rules
read rules file: /lib/udev/rules.d/60-persistent-alsa.rules
read rules file: /lib/udev/rules.d/60-persistent-input.rules
read rules file: /lib/udev/rules.d/60-persistent-serial.rules
read rules file: /lib/udev/rules.d/60-persistent-storage-dm.rules
read rules file: /lib/udev/rules.d/60-persistent-storage-tape.rules
read rules file: /lib/udev/rules.d/60-persistent-storage.rules
read rules file: /lib/udev/rules.d/60-persistent-v4l.rules
read rules file: /lib/udev/rules.d/61-accelerometer.rules
read rules file: /lib/udev/rules.d/64-btrfs.rules
read rules file: /lib/udev/rules.d/64-md-raid.rules
read rules file: /etc/udev/rules.d/70-persistent-net.rules
read rules file: /lib/udev/rules.d/70-power-switch.rules
read rules file: /lib/udev/rules.d/73-idrac.rules
read rules file: /lib/udev/rules.d/75-net-description.rules
read rules file: /lib/udev/rules.d/75-persistent-net-generator.rules
read rules file: /lib/udev/rules.d/75-probe_mtd.rules
read rules file: /lib/udev/rules.d/75-tty-description.rules
read rules file: /lib/udev/rules.d/78-graphics-card.rules
read rules file: /lib/udev/rules.d/78-sound-card.rules
read rules file: /lib/udev/rules.d/80-drivers.rules
read rules file: /lib/udev/rules.d/85-hdparm.rules
read rules file: /lib/udev/rules.d/85-keyboard-configuration.rules
read rules file: /lib/udev/rules.d/85-lvm2.rules
read rules file: /lib/udev/rules.d/85-regulatory.rules
read rules file: /lib/udev/rules.d/95-ceph-osd.rules
read rules file: /lib/udev/rules.d/95-kpartx.rules
read rules file: /lib/udev/rules.d/95-multipath.rules
read rules file: /lib/udev/rules.d/95-udev-late.rules
rules contain 24576 bytes tokens (2048 * 12 bytes), 12917 bytes strings
1884 strings (24695 bytes), 1220 de-duplicated (12443 bytes), 665 trie nodes used
MODE 0666 /lib/udev/rules.d/50-udev-default.rules:67
RUN 'socket:/org/kernel/dm/multipath_event' /lib/udev/rules.d/95-multipath.rules:7
handling device node '/dev/net/tun', devnum=c10:200, mode=0666, uid=0, gid=0
can not stat() node '/dev/net/tun' (No such file or directory)
ACTION=add
DEVNAME=/dev/net/tun
DEVPATH=/devices/virtual/misc/tun
MAJOR=10
MINOR=200
SUBSYSTEM=misc
USEC_INITIALIZED=8386977790
run: 'socket:/org/kernel/dm/multipath_event'
unload module index