[Qemu-devel] About the code to detect a CD-ROM disk is unmounted

[Qemu-devel] About the code to detect a CD-ROM disk is unmounted

[Yu, Xiaoyang]

[-- Attachment #1: Type: text/plain, Size: 553 bytes --]

Hi guys,

 

I am using QEMU with Xen and Intel VT, and I have a question about
detecting the CD-ROM disk unmount event: When user ejects CD-ROM in the
guest domain, how can QEMU detect this event?

 

I know if we use "info block" command before and after a CD-ROM disk is
ejected, we can see the difference. But I want to add code to handle the
CD-ROM unmount event, so I need to know which source file I should take
a look. It seems to be not "monitor.c". Any comment will be appreciated.
Thanks in advance!

 

Thanks
Xiaoyang


[-- Attachment #2: Type: text/html, Size: 3366 bytes --]

Re: [Qemu-devel] About the code to detect a CD-ROM disk is unmounted

[Lonnie Mendez]

On Thu, 2006-11-30 at 15:03 +0800, Yu, Xiaoyang wrote:
> Hi guys,
> 
>  
> 
> I am using QEMU with Xen and Intel VT, and I have a question about
> detecting the CD-ROM disk unmount event: When user ejects CD-ROM in
> the guest domain, how can QEMU detect this event?
> 
>  
> 
> I know if we use “info block” command before and after a CD-ROM disk
> is ejected, we can see the difference. But I want to add code to
> handle the CD-ROM unmount event, so I need to know which source file I
> should take a look. It seems to be not “monitor.c”. Any comment will
> be appreciated. Thanks in advance!

hw/ide.c, block.c:bdrv_eject()

RE: [Qemu-devel] About the code to detect a CD-ROM disk is unmounted

[Yu, Xiaoyang]

Great! Thanks a lot for the information! I found the function definition in the files you pointed out, by looking into the latest CVS snapshot. 

It seems that code changed a lot since version 0.8.2 released. So if I still use version 0.8.2, is there some files or function I should look at instead? Thanks a lot!

Thanks
Xiaoyang

-----Original Message-----
From: qemu-devel-bounces+xiaoyang.yu=intel.com@nongnu.org [mailto:qemu-devel-bounces+xiaoyang.yu=intel.com@nongnu.org] On Behalf Of Lonnie Mendez
Sent: 2006年11月30日 15:08
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] About the code to detect a CD-ROM disk is unmounted

On Thu, 2006-11-30 at 15:03 +0800, Yu, Xiaoyang wrote:
> Hi guys,
> 
>  
> 
> I am using QEMU with Xen and Intel VT, and I have a question about
> detecting the CD-ROM disk unmount event: When user ejects CD-ROM in
> the guest domain, how can QEMU detect this event?
> 
>  
> 
> I know if we use “info block” command before and after a CD-ROM disk
> is ejected, we can see the difference. But I want to add code to
> handle the CD-ROM unmount event, so I need to know which source file I
> should take a look. It seems to be not “monitor.c”. Any comment will
> be appreciated. Thanks in advance!

hw/ide.c, block.c:bdrv_eject()

RE: [Qemu-devel] About the code to detect a CD-ROM disk is unmounted

[Lonnie Mendez]

On Fri, 2006-12-01 at 16:21 +0800, Yu, Xiaoyang wrote:
> Great! Thanks a lot for the information! I found the function definition in the files you pointed out, by looking into the latest CVS snapshot. 
> 
> It seems that code changed a lot since version 0.8.2 released. So if I still use version 0.8.2, is there some files or function I should look at instead? Thanks a lot!

I found this just by searching for 'eject' in the source.  It does look
like qemu from cvs has nicely refactored the code for dealing with
removable media since the qemu 0.8.2 release.  Follow the path of the
bdrv_close handler (for cdrom raw_close() is called).  The call is made
from hw/ide.c (GPCMD_START_STOP_UNIT).

RE: [Qemu-devel] About the code to detect a CD-ROM disk is unmounted

[Yu, Xiaoyang]

Yes raw_close() will be triggered when issue "eject CD-ROM" command in guest OS.  Thanks a lot for your help. Much appreciated. 

-----Original Message-----
From: qemu-devel-bounces+xiaoyang.yu=intel.com@nongnu.org [mailto:qemu-devel-bounces+xiaoyang.yu=intel.com@nongnu.org] On Behalf Of Lonnie Mendez
Sent: 2006年12月1日 17:01
To: qemu-devel@nongnu.org
Subject: RE: [Qemu-devel] About the code to detect a CD-ROM disk is unmounted

On Fri, 2006-12-01 at 16:21 +0800, Yu, Xiaoyang wrote:
> Great! Thanks a lot for the information! I found the function definition in the files you pointed out, by looking into the latest CVS snapshot. 
> 
> It seems that code changed a lot since version 0.8.2 released. So if I still use version 0.8.2, is there some files or function I should look at instead? Thanks a lot!

I found this just by searching for 'eject' in the source.  It does look
like qemu from cvs has nicely refactored the code for dealing with
removable media since the qemu 0.8.2 release.  Follow the path of the
bdrv_close handler (for cdrom raw_close() is called).  The call is made
from hw/ide.c (GPCMD_START_STOP_UNIT).