Re: [Qemu-devel] reporting 9pfs init errors

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

Michael Tokarev <mjt@tls.msk.ru> writes:

> Hello.
>
> I've a bugreport against debian qemu package which basically
> states that 9pfs does not work.  After some digging it turned
> out to be error reporting problem, plain and simple.  The
> error message is:
>
> qemu-system-x86_64: -device virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=pwk,bus=pci.0,addr=0x7: Virtio-9p Failed to initialize fs-driver with id:fsdev-fs0 and export path:/home/stevie/Documents/PWK
> qemu-system-x86_64: -device virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=pwk,bus=pci.0,addr=0x7: Device initialization failed.
> qemu-system-x86_64: -device virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=pwk,bus=pci.0,addr=0x7: Device 'virtio-9p-pci' could not be initialized
>
> and the actual problem is that the path is not accessible from
> libvirt-spawned qemu due to permission denied (EPERM) error
> returned from statfs() call.


I have run into that issue once and really wanted to improve the error
handling during startup. I guess we have better error handling during
runtime, ie, file system related errors are correctly mapped and
send to guest. We could definitely imporve our init error handling. 


-aneesh