#kirkstone qemu

["Monsees, Steven C (US)" <steven.monsees@baesystems.com>]

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Hello:

I built kirkstone core-image-sato from scratch no modifications, clean build was going test kirkstone out...
When I went to run using qemu I saw the following issue with "tun", even after a manual tun config I still got another qemu error (see below):


(1)    Is this a known issue and how would I build in proper "tun" support for the core-image-sato/qemu  ?

(2)    How would I run "runqemu-gen-tapdevs" to manually create one for testing ?

[yocto_user@9d7e1015e117 poky-kirkstone-4.0.2]$ ls
bitbake        kirkstone2            MAINTAINERS.md  meta-poky       oe-init-build-env   README.poky.md
contrib        LICENSE               Makefile        meta-selftest   README.hardware.md  README.qemu.md
documentation  LICENSE.GPL-2.0-only  MEMORIAM        meta-skeleton   README.md           scripts
kirkstone1     LICENSE.MIT           meta            meta-yocto-bsp  README.OE-Core.md
[yocto_user@9d7e1015e117 poky-kirkstone-4.0.2]$ source oe-init-build-env kirkstone2
You had no conf/bblayers.conf file. This configuration file has therefore been
created for you with some default values. To add additional metadata layers
into your configuration please add entries to conf/bblayers.conf.

The Yocto Project has extensive documentation about OE including a reference
manual which can be found at:
    https://docs.yoctoproject.org

For more information about OpenEmbedded see the website:
    https://www.openembedded.org/


### Shell environment set up for builds. ###

You can now run 'bitbake <target>'

Common targets are:
    core-image-minimal
    core-image-full-cmdline
    core-image-sato
    core-image-weston
    meta-toolchain
    meta-ide-support

You can also run generated qemu images with a command like 'runqemu qemux86'

Other commonly useful commands are:
- 'devtool' and 'recipetool' handle common recipe tasks
- 'bitbake-layers' handles common layer tasks
- 'oe-pkgdata-util' handles common target package tasks
[yocto_user@9d7e1015e117 kirkstone2]$ bitbake -k core-image-sato
Loading cache: 100% |                                                                                       | ETA:  --:--:--
Loaded 0 entries from dependency cache.
Parsing recipes: 100% |######################################################################################| Time: 0:00:49
Parsing of 882 .bb files complete (0 cached, 882 parsed). 1641 targets, 44 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION           = "2.0.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "centos-7"
TARGET_SYS           = "x86_64-poky-linux"
MACHINE              = "qemux86-64"
DISTRO               = "poky"
DISTRO_VERSION       = "4.0.2"
TUNE_FEATURES        = "m64 core2"
TARGET_FPU           = ""
meta
meta-poky
meta-yocto-bsp       = "<unknown>:<unknown>"

Initialising tasks: 100% |###################################################################################| Time: 0:00:05
Sstate summary: Wanted 2730 Local 2722 Mirrors 5 Missed 3 Current 0 (99% match, 0% complete)
NOTE: Executing Tasks
NOTE: Tasks Summary: Attempted 6556 tasks of which 6543 didn't need to be rerun and all succeeded.
[yocto_user@9d7e1015e117 kirkstone2]$ runqemu qemux86-64
runqemu - INFO - Running MACHINE=qemux86-64 bitbake -e ...
runqemu - ERROR - TUN control device /dev/net/tun is unavailable; you may need to enable TUN (e.g. sudo modprobe tun)
runqemu - INFO - Cleaning up
[yocto_user@9d7e1015e117 kirkstone2]$ lsmod |grep tun
tun                    36164  0
[yocto_user@9d7e1015e117 kirkstone2]$ sudo modprobe tun
[sudo] password :
[yocto_user@9d7e1015e117 kirkstone2]$ lsmod |grep tun
tun                    36164  0
[yocto_user@9d7e1015e117 kirkstone2]$ ls /dev
console  core  fd  full  mqueue  null  ptmx  pts  random  shm  stderr  stdin  stdout  tty  urandom  zero
[yocto_user@9d7e1015e117 kirkstone2]$ mkdir -p /dev/net
mkdir: cannot create directory '/dev/net': Permission denied
[yocto_user@9d7e1015e117 kirkstone2]$ sudo mkdir -p /dev/net
[yocto_user@9d7e1015e117 kirkstone2]$ ls /dev
console  core  fd  full  mqueue  net  null  ptmx  pts  random  shm  stderr  stdin  stdout  tty  urandom  zero
[yocto_user@9d7e1015e117 kirkstone2]$ sudo mknod /dev/net/tun c 10 200
[yocto_user@9d7e1015e117 kirkstone2]$ sudo chmod 0666 /dev/net/tun
[yocto_user@9d7e1015e117 kirkstone2]$ ls -l /dev/net/tun
crw-rw-rw-. 1 root root 10, 200 Aug 10 14:10 /dev/net/tun
[yocto_user@9d7e1015e117 kirkstone2]$ runqemu qemux86-64
runqemu - INFO - Running MACHINE=qemux86-64 bitbake -e ...
runqemu - INFO - Continuing with the following parameters:
KERNEL: [/disk0/scratch/yocto_user/yocto/workspace_zeus/poky-kirkstone-4.0.2/kirkstone2/tmp/deploy/images/qemux86-64/bzImage--5.15.44+git0+947149960e_eb3df10e3f-r0-qemux86-64-20220809161004.bin]
MACHINE: [qemux86-64]
FSTYPE: [ext4]
ROOTFS: [/disk0/scratch/yocto_user/yocto/workspace_zeus/poky-kirkstone-4.0.2/kirkstone2/tmp/deploy/images/qemux86-64/core-image-sato-qemux86-64-20220810140132.rootfs.ext4]
CONFFILE: [/disk0/scratch/yocto_user/yocto/workspace_zeus/poky-kirkstone-4.0.2/kirkstone2/tmp/deploy/images/qemux86-64/core-image-sato-qemux86-64-20220810140132.qemuboot.conf]

runqemu - INFO - Setting up tap interface under sudo
runqemu - ERROR - Setting up tap device failed:
Command '('sudo', '/disk0/scratch/yocto_user/yocto/workspace_zeus/poky-kirkstone-4.0.2/scripts/runqemu-ifup', '1000', '1000', '/disk0/scratch/yocto_user/yocto/workspace_zeus/poky-kirkstone-4.0.2/kirkstone2/tmp/work/x86_64-linux/qemu-helper-native/1.0-r1/recipe-sysroot-native/usr/bin')' returned non-zero exit status 1.
Run runqemu-gen-tapdevs to manually create one.
runqemu - INFO - Cleaning up
[yocto_user@9d7e1015e117 kirkstone2]$

Thanks,
Steve

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