I did a bit research on how to find direct blocks on local storage so I
used the exact commands on the Xen guest vm (running Ubuntu 12.04) :
sudo debugfs /dev/storage_containing_filesystem
stat /path_to_file
And as output I got the same direct block numbers - " addresses " as istat
provides !! Here is a screenshot : http://prntscr.com/9a6m1k
So I guess they are the correct block addresses? :/ correct me if I am
wrong. .
Thanks for your time,
Efstratios
On Fri, Dec 4, 2015 at 2:02 AM, Kazi Fazal <ka...@gm...> wrote:
> I believe those are virtual offsets, not actual addresses. I'm pretty sure
> about that but I could be wrong as I've done this a while back. Please look
> it up. I once had similar problems with sleuthkit in the past.
> On Dec 3, 2015 4:38 PM, "Efstratios Skleparis" <esk...@gm...>
> wrote:
>
>> Dear all,
>>
>> I have a question about the tool istat from sleuth kit library API.
>> Using the tool we get some Direct block "addresses" like on the
>> following example :
>>
>> inode: 2670461
>> Allocated
>> Group: 326
>> Generation Id: 2797282208
>> uid / gid: 1000 / 1000
>> mode: rrw-------
>> size: 6613
>> num of links: 1
>>
>> Inode Times:
>> Accessed: 2015-12-03 11:03:34 (EET)
>> File Modified: 2015-03-27 14:05:13 (EET)
>> Inode Modified: 2015-11-30 18:16:04 (EET)
>>
>> Direct Blocks:
>> 21120876 21120877
>>
>> Those Direct Blocks (numbers) are the Physical Addresses of Blocks on
>> the virtual storage ? Virtual addresses of the blocks ? what exactly?
>>
>> If I use blkcat and one of those number I get correct output of the
>> file I am viewing.
>>
>> My intention is to write a file on a domU of Xen from a dom0
>> perspective. I tried to use write() function but got a bad file
>> descriptor error ..
>>
>> Thanks,
>> Efstratios
>>
>>
>>
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