Re: qemu-bridge-helper failed

[asif siddiqui]

Hii Berto,

Thanks for the inputs. As suggested by you i tried "qemu-system-aarch64 --help | grep helper" which showed the path as /usr/local/libexec/qemu-bridge-helper, but similar output. 

Also i compiled the qemu 5.2.0 and used the following command - 

qemu-system-aarch64 -machine vexpress-a15 -cpu cortex-a57 -m 1G -kernel ifs/aarch64/$IFSNAME -drive file=fs/aarch64/fs.qcow2,if=none,id=drv0 -device virtio-blk-device,drive=drv0 -netdev bridge,br=virbr0,id=net0,helper=/home/asif/qemu_test/qemu-5.2.0/qemu-5.2.0/build/qemu-bridge-helper -device virtio-net-device,netdev=net0,mac=$MACADDR -nographic -serial mon:stdio

giving error as - 

failed to parse default acl file `/home/asif/qemu_test/qemu-5.2.0/qemu-5.2.0/build/../etc/qemu/bridge.conf'
qemu-system-aarch64: bridge helper failed

Any inputs on this ? How can i resolve failed to parse default acl file ?

Regards 
Asif

On Wed, May 26, 2021 at 2:06 AM Berto Furth <bertofurth@sent.com> wrote:

Hi Asif,

This probably isn't it, but can you triple check that the "qemu-bridge-helper" file in the expected location? I normally see that error when a helper isn't where I expect it to be.

Run something like "qemu-system-aarch64 --help | grep helper" to see the location that your version of QEMU is expecting to see the default helper at. Your version might have been compiled so that the helper file needs to be somewhere different than you expect.

Can you try to explicitly specifying the location of the helper with something like

-netdev bridge,br=$INTF,id=net0,helper=/my/directory/qemu-bridge-helper

Good luck!

Berto.

On Wed, 26 May 2021, at 00:09, asif siddiqui wrote:

Hello All, 

I am trying to enable networking in qemu(5.2.0) for QNX as a guest. As mentioned here https://wiki.qemu.org/Features/HelperNetworking i have followed the steps -

1)  enable the setuid attribute for qemu-bridge-helper file. 

2)  echo "allow virbr0" > /etc/qemu/bridge.conf

3)  chmod 0640 /etc/qemu/bridge.conf

When checked on my linux host with brctl show i got the following  - 

bridge name       bridge id                STP  enabled          interfaces

virbr0                 8000.000000000000        yes

When i run the qemu with following command line - 

qemu-system-aarch64 -machine vexpress-a15 -cpu cortex-a57 -m 1G -kernel ifs/aarch64/$IFSNAME -drive file=fs/aarch64/fs.qcow2,if=none,id=drv0 -device virtio-blk-device,drive=drv0 -netdev bridge,br=$INTF,id=net0 -device virtio-net-device,netdev=net0,mac=$MACADDR -nographic -serial mon:stdio

Please find attached the check-net.sh for enabling the network.

I get "qemu-system-aarch64: bridge helper failed". Am i missing something?  Can you please help me out here ?

Regards 

Asif

 

Attachments:

• check-net.sh