From: greg@kroah.com (Greg KH)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Filtering USB storage data in kernel module
Date: Thu, 17 Nov 2011 06:49:05 -0800 [thread overview]
Message-ID: <20111117144905.GA30193@kroah.com> (raw)
In-Reply-To: <4EC4C9AF.8090008@gmail.com>
On Thu, Nov 17, 2011 at 02:15:35PM +0530, Abhijit Pawar wrote:
> Hi All,
> I need to filter the data written/read to and from the USB storage
> disk.
Why?
What are you wanting to do at "filter" time?
Why just USB disks? What makes them special?
How are you going to determine if a disk is a USB device or not?
> Now the way USB is made known to OS is through SCSI and then
> respective filesystem ( mostly usbfs).
Not really, usbfs is only one way, and it has nothing to do with usb
disks.
> So is there any way I can intercept this stack and have my kernel module
> invoked so that I will get the data.
Not easily.
> I have been thinking on two approaches:
>
> 1. Use VFS and write a proxy filesystem for USB device which will filter
> the data.
> 2. checking SCSI and any intercepting point.
Again, what are you trying to "filter"? That will determine where you
make changes.
thanks,
greg k-h
next prev parent reply other threads:[~2011-11-17 14:49 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-17 8:45 Filtering USB storage data in kernel module Abhijit Pawar
2011-11-17 14:49 ` Greg KH [this message]
2011-11-18 13:06 ` Abhijit Pawar
2011-11-18 14:46 ` Greg KH
2011-11-18 15:35 ` Abhijit Pawar
2011-11-21 13:55 ` Abhijit Pawar
2012-01-12 7:03 ` Abhijit Pawar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20111117144905.GA30193@kroah.com \
--to=greg@kroah.com \
--cc=kernelnewbies@lists.kernelnewbies.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).