native: reboot exits instance with TAP interface #14636
Description
Description
When rebooting on a native instance using a tap device, the instance exits with an error message that the TAP device is already in use (EBUSY). This is the case since a274ea4 (#12428) according to my bisect.
Steps to reproduce the issue
Start a native instance of examples/gnrc_networking
sudo dist/tools/tapsetup/tapsetup -d
sudo dist/tools/tapsetup/tapsetup
BOARD=native make -C examples/gnrc_networking
BOARD=native make -C examples/gnrc_networking termand type reboot.
make: Entering directory '/home/mlenders/Repositories/RIOT-OS/RIOT/examples/gnrc_networking'
/home/mlenders/Repositories/RIOT-OS/RIOT/examples/gnrc_networking/bin/native/gnrc_networking.elf tap0
RIOT native interrupts/signals initialized.
LED_RED_OFF
LED_GREEN_ON
RIOT native board initialized.
RIOT native hardware initialization complete.
main(): This is RIOT! (Version: 2020.10-devel-277-ge8a8d-HEAD)
RIOT network stack example application
All up, running the shell now
> reboot
reboot
!! REBOOT !!
Expected results
The node should reboot, the shell input is available again:
RIOT native interrupts/signals initialized.
LED_RED_OFF
LED_GREEN_ON
RIOT native board initialized.
RIOT native hardware initialization complete.
main(): This is RIOT! (Version: 2020.10-devel-277-ge8a8d-HEAD)
RIOT network stack example application
All up, running the shell now
> help
help
Command Description
---------------------------------------
udp send data over UDP and listen on UDP ports
reboot Reboot the node
version Prints current RIOT_VERSION
pm interact with layered PM subsystem
ps Prints information about running threads.
ping6 Ping via ICMPv6
ping Ping via ICMPv6
random_init initializes the PRNG
random_get returns 32 bit of pseudo randomness
nib Configure neighbor information base
ifconfig Configure network interfaces
rpl rpl configuration tool ('rpl help' for more information)
>
Actual results
native instance exits due to EBUSY when trying to use the TAP device.
RIOT native interrupts/signals initialized.
LED_RED_OFF
LED_GREEN_ON
RIOT native board initialized.
RIOT native hardware initialization complete.
/home/mlenders/Repositories/RIOT-OS/RIOT/examples/gnrc_networking/bin/native/gnrc_networking.elf: ioctl TUNSETIFF: Device or resource busy
/home/mlenders/Repositories/RIOT-OS/RIOT/examples/gnrc_networking/bin/native/gnrc_networking.elf: probably the tap interface (tap0) does not exist or is already in use
make: *** [/home/mlenders/Repositories/RIOT-OS/RIOT/examples/gnrc_networking/../../Makefile.include:721: term] Error 1
make: Leaving directory '/home/mlenders/Repositories/RIOT-OS/RIOT/examples/gnrc_networking'
Versions
All RIOT versions after and including a274ea4 (#12428)
Operating System Environment
----------------------------
Operating System: "Arch Linux"
Kernel: Linux 5.7.10-arch1-1 x86_64 unknown
System shell: GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu)
make's shell: GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu)
Installed compiler toolchains
-----------------------------
native gcc: gcc (GCC) 10.1.0
arm-none-eabi-gcc: arm-none-eabi-gcc (Arch Repository) 10.1.0
avr-gcc: missing
mips-mti-elf-gcc: missing
msp430-gcc: missing
riscv-none-embed-gcc: missing
xtensa-esp32-elf-gcc: missing
xtensa-esp8266-elf-gcc: missing
clang: clang version 10.0.1
Installed compiler libs
-----------------------
arm-none-eabi-newlib: "3.3.0"
mips-mti-elf-newlib: missing
riscv-none-embed-newlib: missing
xtensa-esp32-elf-newlib: missing
xtensa-esp8266-elf-newlib: missing
avr-libc: missing (missing)
Installed development tools
---------------------------
ccache: ccache version 3.7.11
cmake: cmake version 3.18.0
cppcheck: missing
doxygen: 1.8.18
git: git version 2.27.0
make: GNU Make 4.3
openocd: Open On-Chip Debugger 0.10.0+dev-01089-g3bfe49266 (2020-02-26-14:18)
python: Python 3.8.4
python2: Python 2.7.18
python3: Python 3.8.4
flake8: 3.8.3 (mccabe: 0.6.1, pycodestyle: 2.6.0, pyflakes: 2.2.0) CPython 3.8.4 on
coccinelle: missing