qemu-ga: 4.0 and 5.0 can't shutdown OpenWRT virtual machine

[RussianNeuroMancer]

Maintainer: @yousong
Environment: OpenWRT 19.07.5 armvirt64

Description:

Due to issue on OpenWRT side, acpid is not an option on armvirt64 target, so I had to resort to qemu-ga for shutdown/reboot, but it doesn't work either. As you can see in log below qemu-ga receive guest-shutdown message from host, but for some reason can not execute shutdown command inside virtual machine. This cause delay on host shutdown.

This issue was also mentioned on OpenWRT forum in context of Proxmox (which means it's also reproducible on x86_64, not only on armvirt64). Here you can take a look at qemu-ga patch for Alpine Linux.

root@router:~# qemu-ga --verbose
1608137479.770384: debug: received EOF
1608137487.692824: debug: read data, count: 59, data: {"execute":"guest-sync", "arguments":{"id":1608137487691}}

1608137487.693193: debug: process_event: called
1608137487.693309: debug: processing command
1608137487.693584: debug: sending data, count: 26
1608137487.696358: debug: read data, count: 62, data: {"execute":"guest-shutdown","arguments":{"mode":"powerdown"}}

1608137487.696671: debug: process_event: called
1608137487.696754: debug: processing command
1608137487.700017: debug: sending data, count: 85

[RussianNeuroMancer]

@yousong what you think, maybe it's make sense to integrate similar patch into qemu-ga package in OpenWRT for both of 19.07 and master branches?

[yousong]

Hi, @RussianNeuroMancer , I just picked the patch from alpine and imported it to master and openwrt-19.07 branch. Only x86_64 was tested though, please see if it works for you on armvirt machines. Thank you!

[RussianNeuroMancer]

@yousong thanks! I will check new package as soon as it will be published in repository.

[RussianNeuroMancer]

@yousong

Hello!

I can not find qemu-ga package here https://downloads.openwrt.org/releases/packages-21.02/aarch64_generic/ for some reason. Is it gone or I been missing something?