From: Greg KH <[EMAIL PROTECTED]>
Reply-To: linux-usb-devel@lists.sourceforge.net
To: [EMAIL PROTECTED]
CC: linux-usb-devel@lists.sourceforge.net, [EMAIL PROTECTED]
Subject: Re: [linux-usb-devel] Query over mouting mass-storage driver
Date: Thu, 27 Apr 2006 22:38:49 -0700
On Fri, Apr 28, 2006 at 05:01:32AM +0000, [EMAIL PROTECTED] wrote:
> Hi,
>
> I have question.
>
> I have written a Skelton driver for Mass-Storage device (init,exit,
probe,
> disconnect,release,and open). When I tried to test (by open
("/dev/sda5",
> read-only)) my Skelton driver by writing an application, i failed to
open.
> I noticed that I have to mount the memory stick after doing insmod
> my_driver.ko.
Yes, that's the way that block devices work.
> my questions are...
Our first one is, why write another mass-storage driver when the kernel
already has 2?
Greg I agree with you. There is no need to write a driver. But What I am
trying to do is, I am learning, I am trying to learn how to write a USB
driver in linux on my own, with the help of this group. So I just wrote a
skelton driver and want to test.
> 1) Do I have to mount the stick like "mount -t vfat /dev/sda5
/mnt/storage"
> before doing open in the application?
You don't ever call "open" on a block device when dealing with a file
system.
Without calling "open( "/dev/usb/<node>", R_ONLY )" how can I access node
for read/write in future when I will write them in my driver?
If you don't mind could be more clear?
> 2) If I mount with the above mentioned command, from my test application
> can I able to access the device with the open call?
No.
What should I do inorder to acess the device from my application by using by
skelton driver?
> 3) Otherwise do I have to write any piece of code in the driver itself
for
> mounting?
You just have to use the standard block driver or scsi interface. You
are doing that, right?
:(......do you mean to say that the scsi commands like Inquiry,
Test_unit_ready, Request_sense?
good luck,
help me....
Thank you,
Jeeva
greg k-h
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