Re: [Qemu-devel] Question about open() in qemu

[Alexey Kardashevskiy]

On 30/11/16 21:11, morgenlette madeBy wrote:
> Hello
> 
> I am studnet studying QEMU.
> 
> I have a question open in QEMU.
> 
> In  function handle_aiocb_rw_linear() in block/raw-posix.c,
> 
> i tried to open my device driver(mydev).
> 
> this driver was confirmed safe operation by test program.
> 
> But in qemu, this driver was not opened returning -1.
> 
> errno is 1. 1 means 'Operation not permitted'
> 
> QEMU is not supporting open()???


Your test program either:
- tries opening file with different flags than the code you added to QEMU   or
- you did run your test program as a root and you are running QEMU as user   or
- the driver behaves different when opened second time.


-- 
Alexey