usbfs mount options doesn't work in 2.6, works fine with 2.4

usbfs mount options doesn't work in 2.6, works fine with 2.4

[Stian Jordet]

Hi,

I just noted that whatever mount options I use on usbfs, they are
ignored. Works just fine on 2.4. Is this something other people are
experiencing as well, or is this some kind of configuration problem? I'm
having this line in fstab:

usbfs   /proc/bus/usb   usbfs   defaults,devmode=0666   0       0

which does what I want with 2.4, but not 2.6..

Best regards,
Stian

Re: usbfs mount options doesn't work in 2.6, works fine with 2.4

[Stian Jordet]

man, 08.12.2003 kl. 05.52 skrev Stian Jordet:
> Is this something other people are
> experiencing as well, or is this some kind of configuration problem? I'm
And I just found:

http://bugzilla.kernel.org/show_bug.cgi?id=1418

and


http://www.ussg.iu.edu/hypermail/linux/kernel/0307.3/0666.html

Oh well. I can use my digital camera as root. No problem :P

Best regards,
Stian

Re: usbfs mount options doesn't work in 2.6, works fine with 2.4

[Greg KH]

On Mon, Dec 08, 2003 at 05:59:10AM +0100, Stian Jordet wrote:
> man, 08.12.2003 kl. 05.52 skrev Stian Jordet:
> > Is this something other people are
> > experiencing as well, or is this some kind of configuration problem? I'm
> And I just found:
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=1418
> 
> and
> 
> 
> http://www.ussg.iu.edu/hypermail/linux/kernel/0307.3/0666.html
> 
> Oh well. I can use my digital camera as root. No problem :P

Yeah, it's a bug.  I haven't had the time to track it down yet.  Any
help with this would be greatly appreciated.

thanks,

greg k-h

Re: usbfs mount options doesn't work in 2.6, works fine with 2.4

[Stian Jordet]

ons, 10.12.2003 kl. 22.31 skrev Greg KH:
> On Mon, Dec 08, 2003 at 05:59:10AM +0100, Stian Jordet wrote:
> > man, 08.12.2003 kl. 05.52 skrev Stian Jordet:
> > > Is this something other people are
> > > experiencing as well, or is this some kind of configuration problem? I'm
> Yeah, it's a bug.  I haven't had the time to track it down yet.  Any
> help with this would be greatly appreciated.

I'd be happy to help, if I weren't too stupid with C. Sorry :(

Best regards,
Stian

Re: usbfs mount options doesn't work in 2.6, works fine with 2.4

[Duncan Sands]

On Wednesday 10 December 2003 23:04, Stian Jordet wrote:
> ons, 10.12.2003 kl. 22.31 skrev Greg KH:
> > On Mon, Dec 08, 2003 at 05:59:10AM +0100, Stian Jordet wrote:
> > > man, 08.12.2003 kl. 05.52 skrev Stian Jordet:
> > > > Is this something other people are
> > > > experiencing as well, or is this some kind of configuration problem?
> > > > I'm
> >
> > Yeah, it's a bug.  I haven't had the time to track it down yet.  Any
> > help with this would be greatly appreciated.
>
> I'd be happy to help, if I weren't too stupid with C. Sorry :(

Well, do your best and keep mentioning this problem.  One day either
you will succeed or someone else (who knows, maybe me...) will have
some spare time when your mail comes in, and look into it.

Ciao,

Duncan.

Re: usbfs mount options doesn't work in 2.6, works fine with 2.4

[OGAWA Hirofumi]

Greg KH <greg@kroah.com> writes:

> On Mon, Dec 08, 2003 at 05:59:10AM +0100, Stian Jordet wrote:
> > http://bugzilla.kernel.org/show_bug.cgi?id=1418
> > and
> > http://www.ussg.iu.edu/hypermail/linux/kernel/0307.3/0666.html
> 
> Yeah, it's a bug.  I haven't had the time to track it down yet.  Any
> help with this would be greatly appreciated.

I looked driver/usb/inode.c. usbfs use get_sb_single(), but doesn't
implement ->remount_fs(). So options can pass the only first mount.

And I guess, in this case, simple_pin_fs() in create_special_files()
did the first mount, and simple_pin_fs() pass the usbfs_fill_super()
to NULL.

I think ->remount_fs() helps this. But I'm not sure, sorry.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

Re: usbfs mount options doesn't work in 2.6, works fine with 2.4

[OGAWA Hirofumi]

OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> writes:

> Greg KH <greg@kroah.com> writes:
> 
> > On Mon, Dec 08, 2003 at 05:59:10AM +0100, Stian Jordet wrote:
> > > http://bugzilla.kernel.org/show_bug.cgi?id=1418
> > > and
> > > http://www.ussg.iu.edu/hypermail/linux/kernel/0307.3/0666.html
> > 
> > Yeah, it's a bug.  I haven't had the time to track it down yet.  Any
> > help with this would be greatly appreciated.
> 
> I looked driver/usb/inode.c. usbfs use get_sb_single(), but doesn't
> implement ->remount_fs(). So options can pass the only first mount.
> 
> And I guess, in this case, simple_pin_fs() in create_special_files()
> did the first mount, and simple_pin_fs() pass the usbfs_fill_super()
> to NULL.
> 
> I think ->remount_fs() helps this. But I'm not sure, sorry.

Ah, ->remount_fs() is not enough for already created inode, even if I
was right.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>