FSO and g_ether as module [Was: Re: usb mass media storage]

[shawnzier]

On Fri, Sep 05, 2008 at 01:11:30PM +0800, Andy Green wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
> 
> Somebody in the thread at some point said:
> 
> | Where did you get that kernel image? I haven't been able to find it
> | anywhere. Is there any other way to get those commands?
> 
> Any recent kernel package should have these modules.
I am using fso-unstable. The g_ether module must be compiled in because lsmod 
gives me nothing. I tried using a kernel from the daily builds
http://downloads.openmoko.org/daily/

but usb networking won't work. It tries to configure networking on boot and 
fails with "no such device". Is there any way I can get g_ether compiled as a 
module with FSO? 




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Re: usb mass media storage

[Marco Trevisan (Treviño)]

[EMAIL PROTECTED] wrote:
>> The host has direct access to the block device, so it is important
>> that /dev/mmcblk0p1 is not mounted on both the phone and the host at
>> the same time (unless it's mounted ro on both).
> 
> What if it was mounted ro on the phone side and rw on the host side? Would 
> that cause problems?

It shouldn't, but I'd like to get a confirmation too :P

Btw I think that the safer way is that of using a "memory-stick" file 
saved in SD as explained by Christian Adams...

-- 
Treviño's World - Life and Linux
http://www.3v1n0.net/


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Re: usb mass media storage

[Dale Maggee]

arne anka wrote:
> try to put your echo strings in quotes:
>
> echo -n "ifdown usb0..."
>   

did that, no luck. this time is froze after echoing "ifdown usb0..."


...?

-D

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Re: usb mass media storage

[shawnzier]

On Fri, Sep 05, 2008 at 01:04:52PM +0200, pHilipp Zabel wrote:
> On Fri, Sep 5, 2008 at 4:41 AM, Dale Maggee <[EMAIL PROTECTED]> wrote:
> > Petr Vanek wrote:
> >> I have spent a while googling this up and have no wiki skills but
> >> someone might find this useful:
> >>
> >> to make FR act as a memory stick, here is what my script does:
> >>
> >>
> >> #!/bin/sh
> >> /etc/init.d/networking stop
> >> rmmod g_ether
> >> modprobe g_file_storage file=/dev/mmcblk0p1
> >>
> >> --
> >> Petr Vaněk
> >> http://biodynamika.cz
> >>
> > very cool, but before I test it out (potentially breaking my usb
> > networking in the process), I have a couple of questions:
> >
> > 1. will this persist over a reboot, or will it revert back to being an
> > ethernet gadget when I reboot?
> 
> It's not persistent unless you add something like this to the init
> scripts. After rebooting the ethernet gadget will be back.
> 
> > 2. is the following sufficient to switch it back?
> >
> > #!/bin/sh
> > rmmod g_file_storage
> > modprobe g_ether
> > ifup usb0
> >
> > (assuming I replaced '/etc/init.d/networking stop' with 'ifdown usb0' as
> > recommended by Daniel)
> >
> > 3. can somebody point me to a resource for the g_file_storage module
> > where I can learn more about it? I did a couple of quick googles but
> > didn't see anything promising. specifically I'd like to know more about
> > the file parameter - I assume that in this scenario our "usb stick" is
> > using partition/device information from /dev/mmcblk0p1, and will be
> > partitioned in the same way as the SD card? what If I wanted to have my
> > home directory accessible in "usb stick" mode?
> 
> I suggest to read the comment in the source code, it's quite detailed:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=drivers/usb/gadget/file_storage.c;hb=HEAD
> 
> The file parameter determines the raw backing store for the storage
> device, so if you
> have file=/dev/mmcblk0p1, its contents will directly appear as
> /dev/sdx on the host. As mmcblk0p1 doesn't contain a partition table,
> so won't sdx. If you want to export the whole device, use
> file=/dev/mmcblk0, you'll get the partition table in /dev/sdx and the
> kernel will parse it and create /dev/sdx1 (containing the contents of
> /dev/mmcblk0p1) etc.
> 
> The host has direct access to the block device, so it is important
> that /dev/mmcblk0p1 is not mounted on both the phone and the host at
> the same time (unless it's mounted ro on both).

What if it was mounted ro on the phone side and rw on the host side? Would that 
cause problems?


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Re: usb mass media storage

[arne anka]

try to put your echo strings in quotes:

echo -n "ifdown usb0..."

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Re: usb mass media storage

[Dale Maggee]

Christian Adams wrote:
> moinmoin
>
> there is no "must" for using /dev/mmc* .. you could also use a plain  
> file:
>
> preparations:
>
> create mem_stick.fs file
> dd if=/dev/zero of=mem_stick.fs bs=512 count=1048576 # for a 512mb  
> "memory-stick" with blocksize=512 bytes
>
> create filesystem on mem_stick.fs:
> mkfs.ext3 mem_stick.fs
>
> from FR you can mount this filesystem with:
> mount -o loop mem_stick.fs some_mount_point
>
> and for exporting via usb:
>
> rmmod g_ether
> # if mount -> umount!
> modprobe g_file_storage file=mem_stick.fs
>
> regards, morlac
>
>   
>> On Fri, Sep 5, 2008 at 4:41 AM, Dale Maggee  
>> <[EMAIL PROTECTED]> wrote:
>> 
>>> Petr Vanek wrote:
>>>   
 I have spent a while googling this up and have no wiki skills but
 someone might find this useful:

 to make FR act as a memory stick, here is what my script does:


 #!/bin/sh
 /etc/init.d/networking stop
 rmmod g_ether
 modprobe g_file_storage file=/dev/mmcblk0p1

 --
 Petr Vaněk
 http://biodynamika.cz

 
>>> very cool, but before I test it out (potentially breaking my usb
>>> networking in the process), I have a couple of questions:
>>>
>>> 1. will this persist over a reboot, or will it revert back to  
>>> being an
>>> ethernet gadget when I reboot?
>>>   
>> It's not persistent unless you add something like this to the init
>> scripts. After rebooting the ethernet gadget will be back.
>>
>> 
>>> 2. is the following sufficient to switch it back?
>>>
>>> #!/bin/sh
>>> rmmod g_file_storage
>>> modprobe g_ether
>>> ifup usb0
>>>
>>> (assuming I replaced '/etc/init.d/networking stop' with 'ifdown  
>>> usb0' as
>>> recommended by Daniel)
>>>
>>> 3. can somebody point me to a resource for the g_file_storage module
>>> where I can learn more about it? I did a couple of quick googles but
>>> didn't see anything promising. specifically I'd like to know more  
>>> about
>>> the file parameter - I assume that in this scenario our "usb  
>>> stick" is
>>> using partition/device information from /dev/mmcblk0p1, and will be
>>> partitioned in the same way as the SD card? what If I wanted to  
>>> have my
>>> home directory accessible in "usb stick" mode?
>>>   
>> I suggest to read the comment in the source code, it's quite detailed:
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/ 
>> linux-2.6.git;a=blob;f=drivers/usb/gadget/file_storage.c;hb=HEAD
>>
>> The file parameter determines the raw backing store for the storage
>> device, so if you
>> have file=/dev/mmcblk0p1, its contents will directly appear as
>> /dev/sdx on the host. As mmcblk0p1 doesn't contain a partition table,
>> so won't sdx. If you want to export the whole device, use
>> file=/dev/mmcblk0, you'll get the partition table in /dev/sdx and the
>> kernel will parse it and create /dev/sdx1 (containing the contents of
>> /dev/mmcblk0p1) etc.
>>
>> The host has direct access to the block device, so it is important
>> that /dev/mmcblk0p1 is not mounted on both the phone and the host at
>> the same time (unless it's mounted ro on both).
>>
>> regards
>> Philipp
>>
>> 
>
>   

Thanks for the info! very usefull indeed!

I made a script as follows (echo's are for debugging):

#!/bin/sh 
echo ifdown usb0...
ifdown usb0
echo rmmod g_ether...
rmmod g_ether
echo umount /media/card...
umount /media/card
echo modprobe g_file_storage file=/dev/mmcblk0p1...
modprobe g_file_storage file=/dev/mmcblk0p1

only problem is, when i run this in the 2007.2 terminal, it echoes 
'umount /media/card', and then totally freezes the freerunner! (to the 
point ofhaving to unplug the battery and reboot)

if i comment out the offending line in the script, then type 'umount 
/media/card', then run the script, it works fine...

thoughts?

Thanks,
-Dale

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Re: usb mass media storage

[Christian Adams]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

moinmoin

there is no "must" for using /dev/mmc* .. you could also use a plain  
file:

preparations:

create mem_stick.fs file
dd if=/dev/zero of=mem_stick.fs bs=512 count=1048576 # for a 512mb  
"memory-stick" with blocksize=512 bytes

create filesystem on mem_stick.fs:
mkfs.ext3 mem_stick.fs

from FR you can mount this filesystem with:
mount -o loop mem_stick.fs some_mount_point

and for exporting via usb:

rmmod g_ether
# if mount -> umount!
modprobe g_file_storage file=mem_stick.fs

regards, morlac


Am 05.09.2008 um 13:04 schrieb pHilipp Zabel:

> On Fri, Sep 5, 2008 at 4:41 AM, Dale Maggee  
> <[EMAIL PROTECTED]> wrote:
>> Petr Vanek wrote:
>>> I have spent a while googling this up and have no wiki skills but
>>> someone might find this useful:
>>>
>>> to make FR act as a memory stick, here is what my script does:
>>>
>>>
>>> #!/bin/sh
>>> /etc/init.d/networking stop
>>> rmmod g_ether
>>> modprobe g_file_storage file=/dev/mmcblk0p1
>>>
>>> --
>>> Petr Vaněk
>>> http://biodynamika.cz
>>>
>> very cool, but before I test it out (potentially breaking my usb
>> networking in the process), I have a couple of questions:
>>
>> 1. will this persist over a reboot, or will it revert back to  
>> being an
>> ethernet gadget when I reboot?
>
> It's not persistent unless you add something like this to the init
> scripts. After rebooting the ethernet gadget will be back.
>
>> 2. is the following sufficient to switch it back?
>>
>> #!/bin/sh
>> rmmod g_file_storage
>> modprobe g_ether
>> ifup usb0
>>
>> (assuming I replaced '/etc/init.d/networking stop' with 'ifdown  
>> usb0' as
>> recommended by Daniel)
>>
>> 3. can somebody point me to a resource for the g_file_storage module
>> where I can learn more about it? I did a couple of quick googles but
>> didn't see anything promising. specifically I'd like to know more  
>> about
>> the file parameter - I assume that in this scenario our "usb  
>> stick" is
>> using partition/device information from /dev/mmcblk0p1, and will be
>> partitioned in the same way as the SD card? what If I wanted to  
>> have my
>> home directory accessible in "usb stick" mode?
>
> I suggest to read the comment in the source code, it's quite detailed:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/ 
> linux-2.6.git;a=blob;f=drivers/usb/gadget/file_storage.c;hb=HEAD
>
> The file parameter determines the raw backing store for the storage
> device, so if you
> have file=/dev/mmcblk0p1, its contents will directly appear as
> /dev/sdx on the host. As mmcblk0p1 doesn't contain a partition table,
> so won't sdx. If you want to export the whole device, use
> file=/dev/mmcblk0, you'll get the partition table in /dev/sdx and the
> kernel will parse it and create /dev/sdx1 (containing the contents of
> /dev/mmcblk0p1) etc.
>
> The host has direct access to the block device, so it is important
> that /dev/mmcblk0p1 is not mounted on both the phone and the host at
> the same time (unless it's mounted ro on both).
>
> regards
> Philipp
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Re: usb mass media storage

[pHilipp Zabel]

On Fri, Sep 5, 2008 at 4:41 AM, Dale Maggee <[EMAIL PROTECTED]> wrote:
> Petr Vanek wrote:
>> I have spent a while googling this up and have no wiki skills but
>> someone might find this useful:
>>
>> to make FR act as a memory stick, here is what my script does:
>>
>>
>> #!/bin/sh
>> /etc/init.d/networking stop
>> rmmod g_ether
>> modprobe g_file_storage file=/dev/mmcblk0p1
>>
>> --
>> Petr Vaněk
>> http://biodynamika.cz
>>
> very cool, but before I test it out (potentially breaking my usb
> networking in the process), I have a couple of questions:
>
> 1. will this persist over a reboot, or will it revert back to being an
> ethernet gadget when I reboot?

It's not persistent unless you add something like this to the init
scripts. After rebooting the ethernet gadget will be back.

> 2. is the following sufficient to switch it back?
>
> #!/bin/sh
> rmmod g_file_storage
> modprobe g_ether
> ifup usb0
>
> (assuming I replaced '/etc/init.d/networking stop' with 'ifdown usb0' as
> recommended by Daniel)
>
> 3. can somebody point me to a resource for the g_file_storage module
> where I can learn more about it? I did a couple of quick googles but
> didn't see anything promising. specifically I'd like to know more about
> the file parameter - I assume that in this scenario our "usb stick" is
> using partition/device information from /dev/mmcblk0p1, and will be
> partitioned in the same way as the SD card? what If I wanted to have my
> home directory accessible in "usb stick" mode?

I suggest to read the comment in the source code, it's quite detailed:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=drivers/usb/gadget/file_storage.c;hb=HEAD

The file parameter determines the raw backing store for the storage
device, so if you
have file=/dev/mmcblk0p1, its contents will directly appear as
/dev/sdx on the host. As mmcblk0p1 doesn't contain a partition table,
so won't sdx. If you want to export the whole device, use
file=/dev/mmcblk0, you'll get the partition table in /dev/sdx and the
kernel will parse it and create /dev/sdx1 (containing the contents of
/dev/mmcblk0p1) etc.

The host has direct access to the block device, so it is important
that /dev/mmcblk0p1 is not mounted on both the phone and the host at
the same time (unless it's mounted ro on both).

regards
Philipp
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Re: usb mass media storage

[Dale Maggee]

Petr Vanek wrote:
> I have spent a while googling this up and have no wiki skills but
> someone might find this useful:
>
> to make FR act as a memory stick, here is what my script does:
>
>
> #!/bin/sh 
>   
> 
> /etc/init.d/networking stop
> rmmod g_ether
> modprobe g_file_storage file=/dev/mmcblk0p1
>
> --
> Petr Vaněk
> http://biodynamika.cz
>   
very cool, but before I test it out (potentially breaking my usb 
networking in the process), I have a couple of questions:

1. will this persist over a reboot, or will it revert back to being an 
ethernet gadget when I reboot?

2. is the following sufficient to switch it back?

#!/bin/sh
rmmod g_file_storage
modprobe g_ether
ifup usb0

(assuming I replaced '/etc/init.d/networking stop' with 'ifdown usb0' as 
recommended by Daniel)

3. can somebody point me to a resource for the g_file_storage module 
where I can learn more about it? I did a couple of quick googles but 
didn't see anything promising. specifically I'd like to know more about 
the file parameter - I assume that in this scenario our "usb stick" is 
using partition/device information from /dev/mmcblk0p1, and will be 
partitioned in the same way as the SD card? what If I wanted to have my 
home directory accessible in "usb stick" mode?

Thanks,
-Dale

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Re: usb mass media storage

[Fox Mulder]

1. This only works until reboot or manually reverting it.

2. Don't know, maybe. :)

3. /dev/mmcblk0p1 is the first partition on the sd card. So the "usb
stick" will only show this one partition and nothing more.

Ciao,
 Rainer

Dale Maggee wrote:
> Petr Vanek wrote:
>> I have spent a while googling this up and have no wiki skills but
>> someone might find this useful:
>>
>> to make FR act as a memory stick, here is what my script does:
>>
>>
>> #!/bin/sh
>>  
>>   
>> /etc/init.d/networking stop
>> rmmod g_ether
>> modprobe g_file_storage file=/dev/mmcblk0p1
>>
>> --
>> Petr Vaněk
>> http://biodynamika.cz
>>   
> 
> very cool, but before I test it out (potentially breaking my usb 
> networking in the process), I have a couple of questions:
> 
> 1. will this persist over a reboot, or will it revert back to being an 
> ethernet gadget when I reboot?
> 
> 2. is the following sufficient to switch it back?
> 
> #!/bin/sh
> rmmod g_file_storage
> modprobe g_ether
> ifup usb0
> 
> (assuming I replaced '/etc/init.d/networking stop' with 'ifdown usb0' as 
> recommended by Daniel)
> 
> 3. can somebody point me to a resource for the g_file_storage module 
> where I can learn more about it? I did a couple of quick googles but 
> didn't see anything promising. specifically I'd like to know more about 
> the file parameter - I assume that in this scenario our "usb stick" is 
> using partition/device information from /dev/mmcblk0p1, and will be 
> partitioned in the same way as the SD card? what If I wanted to have my 
> home directory accessible in "usb stick" mode?
> 
> Thanks,
> -Dale
> 
> 
> 
> ___
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Re: usb mass media storage

[Dale Maggee]

Petr Vanek wrote:
> I have spent a while googling this up and have no wiki skills but
> someone might find this useful:
>
> to make FR act as a memory stick, here is what my script does:
>
>
> #!/bin/sh 
>   
> 
> /etc/init.d/networking stop
> rmmod g_ether
> modprobe g_file_storage file=/dev/mmcblk0p1
>
> --
> Petr Vaněk
> http://biodynamika.cz
>   

very cool, but before I test it out (potentially breaking my usb 
networking in the process), I have a couple of questions:

1. will this persist over a reboot, or will it revert back to being an 
ethernet gadget when I reboot?

2. is the following sufficient to switch it back?

#!/bin/sh
rmmod g_file_storage
modprobe g_ether
ifup usb0

(assuming I replaced '/etc/init.d/networking stop' with 'ifdown usb0' as 
recommended by Daniel)

3. can somebody point me to a resource for the g_file_storage module 
where I can learn more about it? I did a couple of quick googles but 
didn't see anything promising. specifically I'd like to know more about 
the file parameter - I assume that in this scenario our "usb stick" is 
using partition/device information from /dev/mmcblk0p1, and will be 
partitioned in the same way as the SD card? what If I wanted to have my 
home directory accessible in "usb stick" mode?

Thanks,
-Dale



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Re: usb mass media storage

[Andy Green]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Somebody in the thread at some point said:

| Where did you get that kernel image? I haven't been able to find it
| anywhere. Is there any other way to get those commands?

Any recent kernel package should have these modules.

Word of warning though, USB Mass Storage is block based protocol, it
means that if you have the filesystem you are exposing there mounted on
Freerunner side as well, filesystem actions like update directories,
which blocks are free etc will conflict between the two mounts and "less
than good experience will result" :-O

So to play this game you need to ensure you umount the filesystem on the
shared storage from Freerunner first and I guess mount it back afterwards.

- -Andy
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Re: usb mass media storage

[Søren Kristiansen]

Petr Vanek wrote:
> 
> On Wed, 3 Sep 2008 00:22:38 +0200
> "Adrien de Sentenac" <[EMAIL PROTECTED]>
> (ADS) wrote:
> 
>>2008/9/2 Petr Vanek <[EMAIL PROTECTED]>
>>
>>> rmmod g_ether
>>> modprobe g_file_storage file=/dev/mmcblk0p1
>>
>>
>>which kernel/distribution do you use ?
>>it seems I have neither of these modules with om2008.8 (with updates).
>>
> 
> oh, sorry, i could have thought of this.. :) ASU
> 
> [EMAIL PROTECTED]:~# uname -a
> Linux om-gta02 2.6.24 #1 PREEMPT Tue Aug 26 08:33:29 CST 2008 armv4tl
> unknown
> 
> [EMAIL PROTECTED]:~# opkg list_installed | grep kernel | grep image
> kernel-image-2.6.24 -
> 2:2.6.24+git75965+cb3cc53a76c7f1f7c827d048db7a849e77071515-r1.01 -
> 
> 
> --
> Petr Vaněk
> http://biodynamika.cz
> 
> 
> 
> 
> ___
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> 
> 

Where did you get that kernel image? I haven't been able to find it
anywhere. Is there any other way to get those commands?
-- 
View this message in context: 
http://n2.nabble.com/usb-mass-media-storage-tp834747p839359.html
Sent from the Openmoko Community mailing list archive at Nabble.com.


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Re: usb mass media storage

[Petr Vanek]

On Wed, 3 Sep 2008 00:22:38 +0200
"Adrien de Sentenac" <[EMAIL PROTECTED]>
(ADS) wrote:

>2008/9/2 Petr Vanek <[EMAIL PROTECTED]>
>
>> rmmod g_ether
>> modprobe g_file_storage file=/dev/mmcblk0p1
>
>
>which kernel/distribution do you use ?
>it seems I have neither of these modules with om2008.8 (with updates).
>

oh, sorry, i could have thought of this.. :) ASU

[EMAIL PROTECTED]:~# uname -a
Linux om-gta02 2.6.24 #1 PREEMPT Tue Aug 26 08:33:29 CST 2008 armv4tl
unknown

[EMAIL PROTECTED]:~# opkg list_installed | grep kernel | grep image
kernel-image-2.6.24 -
2:2.6.24+git75965+cb3cc53a76c7f1f7c827d048db7a849e77071515-r1.01 -


--
Petr Vaněk
http://biodynamika.cz




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Re: usb mass media storage

[Marco Trevisan (Treviño)]

Adrien de Sentenac wrote:
> 2008/9/2 Petr Vanek <[EMAIL PROTECTED] 
> >
> 
> rmmod g_ether
> modprobe g_file_storage file=/dev/mmcblk0p1
> 
>  
> which kernel/distribution do you use ?
> it seems I have neither of these modules with om2008.8 (with updates).

I figure that you need a kernel compiled with
  CONFIG_USB_STORAGE=m
  CONFIG_USB_ETH=m
isn't it?

-- 
Treviño's World - Life and Linux
http://www.3v1n0.net/


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Re: usb mass media storage

[Adrien de Sentenac]

2008/9/2 Petr Vanek <[EMAIL PROTECTED]>

> rmmod g_ether
> modprobe g_file_storage file=/dev/mmcblk0p1


which kernel/distribution do you use ?
it seems I have neither of these modules with om2008.8 (with updates).
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Re: usb mass media storage

[Al Johnson]

On Tuesday 02 September 2008, Daniel Benoy wrote:
> You may want to use 'ifdown usb0' instead of '/etc/init.d/networking stop',
> in case you want to keep your wifi connection going.
>
> That's cool though :)  I wonder if it's possible to pretend to be a USB
> hub, providing both g_ether and g_file_storage

Not yet. At the moment it's one gadget driver at a time, but there is a 
project under way to allow use of multiple gadget drivers together. 

http://blog.felipebalbi.com/?p=44
http://www.linux-usb.org/gadget/

> On Tuesday 02 September 2008 15:47:18 Petr Vanek wrote:
> > I have spent a while googling this up and have no wiki skills but
> > someone might find this useful:
> >
> > to make FR act as a memory stick, here is what my script does:
> >
> >
> > #!/bin/sh
> > /etc/init.d/networking stop
> > rmmod g_ether
> > modprobe g_file_storage file=/dev/mmcblk0p1
> >
> > --
> > Petr Vaněk
> > http://biodynamika.cz

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Re: usb mass media storage

[Daniel Benoy]

You may want to use 'ifdown usb0' instead of '/etc/init.d/networking stop', in 
case you want to keep your wifi connection going.

That's cool though :)  I wonder if it's possible to pretend to be a USB hub, 
providing both g_ether and g_file_storage

On Tuesday 02 September 2008 15:47:18 Petr Vanek wrote:
> I have spent a while googling this up and have no wiki skills but
> someone might find this useful:
> 
> to make FR act as a memory stick, here is what my script does:
> 
> 
> #!/bin/sh 
>   
> 
> /etc/init.d/networking stop
> rmmod g_ether
> modprobe g_file_storage file=/dev/mmcblk0p1
> 
> --
> Petr Vaněk
> http://biodynamika.cz
> 
> 
> 
> 
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> 



-- 
Daniel Benoy
http://daniel.benoy.name

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usb mass media storage

[Petr Vanek]

I have spent a while googling this up and have no wiki skills but
someone might find this useful:

to make FR act as a memory stick, here is what my script does:


#!/bin/sh   


/etc/init.d/networking stop
rmmod g_ether
modprobe g_file_storage file=/dev/mmcblk0p1

--
Petr Vaněk
http://biodynamika.cz




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