Re: Unmount and mount a mass storage from shell

["Carsey, Jaben" <jaben.carsey@intel.com>]

Keshava,

After you remove and replug it, I think you need to do "connect -r" to recursively reconnect drivers, then do the "map -r" to generate a new mapping.  

Reconnecting drivers is standard user behavior after plug in a USB device.  It is not expected to happen automatically.

-Jaben

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> GN Keshava
> Sent: Tuesday, May 30, 2017 8:35 PM
> To: Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> Subject: Re: [edk2] Unmount and mount a mass storage from shell
> Importance: High
> 
> Hi Jaben,
> 
> Thanks a lot for your input.
> 
> As I have mentioned in previous mail, I'm facing an issue now, that, If I
> reconnect my client device, the mass storage is not able to mount again
> automatically.
> Here is few more details. Expecting some help on this :
> 
> I connect the the client device to UEFI host. I get the mass storage
> successfully. (device is listed as Mass storage in devices command)
> The client device also has serial CDC functionality (It is Linux CDC
> gadget, which will enumerate as both Mass storage (FAT32) and CDC serial
> com port).
> To use serial port, I have developed a custom serial driver. I use VID PID
> of the device in this custom driver to bind the driver to the device. I
> load this driver, and I get serial port (It is listed in sermode command)
> Now I refresh the mapping using map -r. Still I get the mass storage of
> device, and I'm able to access it correctly.
> Now I disconnect the client from host (UEFI) by unplugging the device.
> When I connect the device again, I'm not able to get Mass storage if i run
> map -r. But serial port will start to work fine again.
> 
> If I run devices command, it is not shown as mass storage. but as linux
> gadget.
> Now if I use disconnect command, and followed by connect command to this
> device with mass storage driver, I'm able to mount the mass storage and use
> it.
> The issue is present if I load my serial driver, which uses device's VID
> PID. If I unload this driver and do the unplug-plug, I'm able to get mass
> storage automatically..
> 
> What could be the issue? Is there any way to solve this?
> 
> (sorry for long post, it's difficult to explain otherwise)
> 
> Thanks again.
> Regards,
> Keshava
> 
> On Tue, 30 May 2017 at 20:56 Carsey, Jaben <jaben.carsey@intel.com>
> wrote:
> 
> > I think that you will always need to inform the UEFI Shell of the change.
> > It is not designed to automatically do detection of
> added/removed/changed
> > devices.
> >
> >
> >
> > I think that your solution to use the code from mount makes the most
> sense.
> >
> >
> >
> > -Jaben
> >
> >
> >
> > *From:* GN Keshava [mailto:keshava.gn@gmail.com]
> > *Sent:* Thursday, May 25, 2017 11:02 PM
> > *To:* Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> > *Subject:* Re: [edk2] Unmount and mount a mass storage from shell
> > *Importance:* High
> >
> >
> >
> > Hi Jaben, Thanks a lot for input. My necessity for unmount-mount is that,
> > the USB client is a Linux storage gadget, which needs to be remounted to
> > get the updated/new files created by Linux. Anyhow, now I'm doing this
> > programmatically by copying mount command code from older shell. :)
> >
> >
> >
> > One more issue is that, after Linux updates some file (on client side,
> > Linux will mount the same partition, save some file, and then umount the
> > partition. Then if i remount the partition on Host side, when host is
> > windows, i will get updated files) I will manually remove and connect the
> > cable (MS device), UEFI is not able to detect the MS itself. (This issue
> > observed, regardless of remount. This issue is not there on windows 10
> > host).
> >
> > Can you give some pointers on this?
> >
> >
> >
> > Thanks a lot, Jaben.
> >
> >
> >
> > Regards,
> >
> > Keshava
> >
> >
> >
> > On Thu, 25 May 2017 at 21:26 Carsey, Jaben <jaben.carsey@intel.com>
> wrote:
> >
> > You can "disconnect" the driver
> > You can do "map -d" to delete a mapping
> >
> > I am unsure what your goals are for mount/unmount
> >
> > -Jaben
> >
> > > -----Original Message-----
> > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > > GN Keshava
> > > Sent: Wednesday, May 24, 2017 10:59 PM
> > > To: edk2-devel@lists.01.org
> > > Subject: [edk2] Unmount and mount a mass storage from shell
> > > Importance: High
> > >
> > > How can I unmount and mount a mass storage fs from UEFI shell?
> > >
> > > In older EFI shells, I can do with "mount" command. But it just does
> > > "mapping" in newer shell. It doesn't actually remounting the device.
> > >
> > > Please help.
> > >
> > > thanks
> > > _______________________________________________
> > > edk2-devel mailing list
> > > edk2-devel@lists.01.org
> > > https://lists.01.org/mailman/listinfo/edk2-devel
> >
> >
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