linux-ext4 - Re: inode and blocks

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Message-ID: <2d08ef090809300656k5b430dd6t6c64fe1c1515af5a@mail.gmail.com>
Date:	Tue, 30 Sep 2008 19:26:23 +0530
From:	"Rohit Sharma" <imreckless@...il.com>
To:	Sunil <infinite.questions@...il.com>
Cc:	"Theodore Tso" <tytso@....edu>, ext4 <linux-ext4@...r.kernel.org>,
	Kernelnewbies <kernelnewbies@...linux.org>
Subject: Re: inode and blocks

On Mon, Sep 29, 2008 at 10:54 PM, Sunil <infinite.questions@...il.com> wrote:
>
>
> On Mon, Sep 29, 2008 at 8:03 PM, Rohit Sharma <imreckless@...il.com> wrote:
>>
>> Not an assignment actually, but a project.
>> We are working on open hierarchical storage management, in which we
>> store files on disks according to different file placement policies.
>> For eg. if i say that all the important files, like all the employee
>> database should be in disk 1 and all the songs on disk 2, then we
>> place them accordingly in different disks.
>>
>>
>> On Mon, Sep 29, 2008 at 2:31 AM, Theodore Tso <tytso@....edu> wrote:
>> > On Sun, Sep 28, 2008 at 03:49:04PM +0530, Rohit Sharma wrote:
>> >> Suppose i have a file named abc.txt and i want to specify that
>> >> all the *.txt files must be allocated between block groups no. 100 -
>> >> 200 in ext2 fs.
>> >>
>> >> Is there a way to do this?
>> >>
>> >> can we modify function ext2_new_inode and find_group_orlov for this?
>> >
>> > You would have to modify kernel code to do this; the main question
>> > which comes to mind is *why* would you want to do something like this?
>> > It seems like an ideal problem set that a professor might give to a
>> > student, since it would force them to try to get from an inode to the
>> > pathname used to open the file.  So it seems to be one of these really
>> > pointless things that isn't particularly useful in real life, except
>> > for pedagogical purposes.
>> >
>> >                                                        - Ted
>> >
>>
>> --
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>>
>
> Hi Rohit,
>
> Just out of curiosity, how are you going to identify the type of file inside
Thanks Sunil for looking into the matter.

> kernel ? from an extension or file format ?
>

Yes i will find using extension. :)

> Thanks.
>
> --
> Sunil.
>
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