* How to verify block numbers of file ?
@ 2011-02-20 13:22 kashish bhatia
2011-02-20 14:02 ` Abhijit Hoskeri
` (2 more replies)
0 siblings, 3 replies; 13+ messages in thread
From: kashish bhatia @ 2011-02-20 13:22 UTC (permalink / raw)
To: kernelnewbies
Is there any method/command/utility to know what are the block numbers which
are allocated to a file in ext2 fs?
--
Regards,
Kashish
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* How to verify block numbers of file ?
2011-02-20 13:22 How to verify block numbers of file ? kashish bhatia
@ 2011-02-20 14:02 ` Abhijit Hoskeri
2011-02-20 15:17 ` kashish bhatia
2011-02-21 5:43 ` Greg Freemyer
2011-02-20 14:18 ` abhi
2011-02-20 17:03 ` Manish Katiyar
2 siblings, 2 replies; 13+ messages in thread
From: Abhijit Hoskeri @ 2011-02-20 14:02 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 6:52 PM, kashish bhatia <koolest77@gmail.com> wrote:
> Is there any method/command/utility to know what are the block numbers which
> are allocated to a file in ext2 fs?
>
The FIBMAP ioctl gives you the block number give an integer, which is
the nth block attached to the inode. It includes blocks allocated to
store indirect blocks too.
-Abhijit
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 13:22 How to verify block numbers of file ? kashish bhatia
2011-02-20 14:02 ` Abhijit Hoskeri
@ 2011-02-20 14:18 ` abhi
2011-02-20 17:03 ` Manish Katiyar
2 siblings, 0 replies; 13+ messages in thread
From: abhi @ 2011-02-20 14:18 UTC (permalink / raw)
To: kernelnewbies
Install sleuthkit. It has a bunch of utilities to examine metadata,
blocks, etc. Specifically, checkout istat.
On Sun, Feb 20, 2011 at 6:52 PM, kashish bhatia <koolest77@gmail.com> wrote:
> Is there any method/command/utility to know what are the block numbers which
> are allocated to a file in ext2 fs?
>
> --
> Regards,
> Kashish
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
--
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different things and in different ways and in different seasons.
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strike your own. - Angelo Patri
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 14:02 ` Abhijit Hoskeri
@ 2011-02-20 15:17 ` kashish bhatia
2011-02-20 15:42 ` Abhijit Hoskeri
2011-02-21 5:27 ` SandeepKsinha
2011-02-21 5:43 ` Greg Freemyer
1 sibling, 2 replies; 13+ messages in thread
From: kashish bhatia @ 2011-02-20 15:17 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 7:32 PM, Abhijit Hoskeri
<abhijithoskeri@gmail.com>wrote:
> On Sun, Feb 20, 2011 at 6:52 PM, kashish bhatia <koolest77@gmail.com>
> wrote:
> > Is there any method/command/utility to know what are the block numbers
> which
> > are allocated to a file in ext2 fs?
> >
>
> The FIBMAP ioctl gives you the block number give an integer, which is
> the nth block attached to the inode. It includes blocks allocated to
> store indirect blocks too.
>
> -Abhijit
>
What exactly FIBMAP is and how to use it ?
For instance , if I made my own module and I am using ioctl. Then how should
I use it?
Is it a function?
--
Regards,
Kashish
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* How to verify block numbers of file ?
2011-02-20 15:17 ` kashish bhatia
@ 2011-02-20 15:42 ` Abhijit Hoskeri
2011-02-21 5:27 ` SandeepKsinha
1 sibling, 0 replies; 13+ messages in thread
From: Abhijit Hoskeri @ 2011-02-20 15:42 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 8:47 PM, kashish bhatia <koolest77@gmail.com> wrote:
> What exactly FIBMAP is? and how to use it ?
>
> For instance , if I made my own module and I am using ioctl. Then how should
> I use it?
FIBMAP is an ioctl. It is supposed to be called from a userspace
program. You can use it from userspace like this:
http://smackerelofopinion.blogspot.com/2009//fibmap-ioctl-file-system-block-number.html
If that is what you want to do, you can do the same thing from the
kernel, you can look up ioctl_fibmap in fs/ioctl.c and see if you get
what you need.
-Abhijit
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 13:22 How to verify block numbers of file ? kashish bhatia
2011-02-20 14:02 ` Abhijit Hoskeri
2011-02-20 14:18 ` abhi
@ 2011-02-20 17:03 ` Manish Katiyar
2011-02-20 18:05 ` kashish bhatia
2 siblings, 1 reply; 13+ messages in thread
From: Manish Katiyar @ 2011-02-20 17:03 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 5:22 AM, kashish bhatia <koolest77@gmail.com> wrote:
> Is there any method/command/utility to know what are the block numbers which
> are allocated to a file in ext2 fs?
Use debugfs which comes with e2fsprogs.
>
> --
> Regards,
> Kashish
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
--
Thanks -
Manish
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 17:03 ` Manish Katiyar
@ 2011-02-20 18:05 ` kashish bhatia
2011-02-20 20:39 ` Manish Katiyar
0 siblings, 1 reply; 13+ messages in thread
From: kashish bhatia @ 2011-02-20 18:05 UTC (permalink / raw)
To: kernelnewbies
Hi, Manish
How to use debugfs?
--
Regards,
Kashish
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* How to verify block numbers of file ?
2011-02-20 18:05 ` kashish bhatia
@ 2011-02-20 20:39 ` Manish Katiyar
2011-03-08 10:25 ` kashish bhatia
0 siblings, 1 reply; 13+ messages in thread
From: Manish Katiyar @ 2011-02-20 20:39 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 10:05 AM, kashish bhatia <koolest77@gmail.com> wrote:
> Hi, Manish
>
> How to use debugfs?
debugfs: ncheck 12
Inode Pathname
12 //abc
debugfs: stat <12>
Inode: 12 Type: regular Mode: 0644 Flags: 0x0
Generation: 143681507 Version: 0x00000000
User: 1000 Group: 1000 Size: 104466
File ACL: 0 Directory ACL: 0
Links: 1 Blockcount: 208
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x4d617b78 -- Sun Feb 20 12:37:12 2011
atime: 0x4d617b78 -- Sun Feb 20 12:37:12 2011
mtime: 0x4d617b78 -- Sun Feb 20 12:37:12 2011
BLOCKS:
(0-11):35-46, (IND):47, (12-102):48-138
TOTAL: 104
>
>
>
>
>
> --
> Regards,
> Kashish
>
>
--
Thanks -
Manish
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 15:17 ` kashish bhatia
2011-02-20 15:42 ` Abhijit Hoskeri
@ 2011-02-21 5:27 ` SandeepKsinha
1 sibling, 0 replies; 13+ messages in thread
From: SandeepKsinha @ 2011-02-21 5:27 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 8:47 PM, kashish bhatia <koolest77@gmail.com> wrote:
>
>
> On Sun, Feb 20, 2011 at 7:32 PM, Abhijit Hoskeri <abhijithoskeri@gmail.com>
> wrote:
>>
>> On Sun, Feb 20, 2011 at 6:52 PM, kashish bhatia <koolest77@gmail.com>
>> wrote:
>> > Is there any method/command/utility to know what are the block numbers
>> > which
>> > are allocated to a file in ext2 fs?
>> >
>>
You can use debugfs utility. Otherwise if you want to use the API, you
can use FIBMAP.
Google for usage of FIBMAP, you will get it for sure !
>> The FIBMAP ioctl gives you the block number give an integer, which is
>> the nth block attached to the inode. It includes blocks allocated to
>> store indirect blocks too.
>>
>> -Abhijit
>
>
> What exactly FIBMAP is? and how to use it ?
>
> For instance , if I made my own module and I am using ioctl. Then how should
> I use it?
>
> Is it a function?
>
>
> --
> Regards,
> Kashish
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
--
Regards,
Sandeep.
?To learn is to change. Education is a process that changes the learner.?
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 14:02 ` Abhijit Hoskeri
2011-02-20 15:17 ` kashish bhatia
@ 2011-02-21 5:43 ` Greg Freemyer
1 sibling, 0 replies; 13+ messages in thread
From: Greg Freemyer @ 2011-02-21 5:43 UTC (permalink / raw)
To: kernelnewbies
On Sun, Feb 20, 2011 at 9:02 AM, Abhijit Hoskeri
<abhijithoskeri@gmail.com> wrote:
> On Sun, Feb 20, 2011 at 6:52 PM, kashish bhatia <koolest77@gmail.com> wrote:
>> Is there any method/command/utility to know what are the block numbers which
>> are allocated to a file in ext2 fs?
>>
>
> The FIBMAP ioctl gives you the block number give an integer, which is
> the nth block attached to the inode. It includes blocks allocated to
> store indirect blocks too.
>
> -Abhijit
hdparm has a FIBMAP argument iirc. I've never used it.
Greg
^ permalink raw reply [flat|nested] 13+ messages in thread
* How to verify block numbers of file ?
2011-02-20 20:39 ` Manish Katiyar
@ 2011-03-08 10:25 ` kashish bhatia
2011-03-08 13:54 ` Vineet Agarwal
0 siblings, 1 reply; 13+ messages in thread
From: kashish bhatia @ 2011-03-08 10:25 UTC (permalink / raw)
To: kernelnewbies
Hi, Manish
I used debugfs . But it is not showing the required output.
[root at KASHISH mnt]# debugfs
debugfs 1.41.9 (22-Aug-2009)
debugfs: ncheck 14
ncheck: Filesystem not open
debugfs: stat <14>
stat: Filesystem not open
I mounted my ext2 fs which I created on /dev/sda5 in /mnt directory and I
want to check block numbers of file with inode 14. How to open the file
system?
--
Regards,
Kashish
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* How to verify block numbers of file ?
2011-03-08 10:25 ` kashish bhatia
@ 2011-03-08 13:54 ` Vineet Agarwal
2011-03-08 15:01 ` kashish bhatia
0 siblings, 1 reply; 13+ messages in thread
From: Vineet Agarwal @ 2011-03-08 13:54 UTC (permalink / raw)
To: kernelnewbies
Hey Kashish,
On Tue, Mar 8, 2011 at 3:55 PM, kashish bhatia <koolest77@gmail.com> wrote:
> Hi, Manish
>
>
> I used debugfs . But it is not showing the required output.
>
>
> [root at KASHISH mnt]# debugfs
> debugfs 1.41.9 (22-Aug-2009)
> debugfs: ncheck 14
> ncheck: Filesystem not open
> debugfs: stat <14>
> stat: Filesystem not open
>
>
>
You need to specify the device name along with debugfs. Look in the man page
for debugfs.
>
> I mounted my ext2 fs which I created on /dev/sda5 in /mnt directory and I
> want to check block numbers of file with inode 14. How to open the file
> system?
>
> --
> Regards,
> Kashish
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
--
Regards:
Vineet Agarwal
http://code.google.com/p/radc/
http://in.linkedin.com/in/vineetvagrwl
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* How to verify block numbers of file ?
2011-03-08 13:54 ` Vineet Agarwal
@ 2011-03-08 15:01 ` kashish bhatia
0 siblings, 0 replies; 13+ messages in thread
From: kashish bhatia @ 2011-03-08 15:01 UTC (permalink / raw)
To: kernelnewbies
yaah, I read the man page
It can be done in following way
[root at KASHISH KASHISH]# debugfs
debugfs 1.41.9 (22-Aug-2009)
debugfs: open -c /dev/sda5
/dev/sda5: catastrophic mode - not reading inode or group bitmaps
debugfs: stat <14>
Inode: 14 Type: regular Mode: 0644 Flags: 0x0
Generation: 1688944868 Version: 0x00000000
User: 0 Group: 0 Size: 48911
File ACL: 1507838 Directory ACL: 0
Links: 1 Blockcount: 8
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x4d75ffd3 -- Tue Mar 8 15:37:15 2011
atime: 0x4d75ffd3 -- Tue Mar 8 15:37:15 2011
mtime: 0x4d75ffd3 -- Tue Mar 8 15:37:15 2011
Size of extra inode fields: 0
BLOCKS:
(0-11):30720-30731
TOTAL: 12
--
Regards,
Kashish
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-- links below jump to the message on this page --
2011-02-20 13:22 How to verify block numbers of file ? kashish bhatia
2011-02-20 14:02 ` Abhijit Hoskeri
2011-02-20 15:17 ` kashish bhatia
2011-02-20 15:42 ` Abhijit Hoskeri
2011-02-21 5:27 ` SandeepKsinha
2011-02-21 5:43 ` Greg Freemyer
2011-02-20 14:18 ` abhi
2011-02-20 17:03 ` Manish Katiyar
2011-02-20 18:05 ` kashish bhatia
2011-02-20 20:39 ` Manish Katiyar
2011-03-08 10:25 ` kashish bhatia
2011-03-08 13:54 ` Vineet Agarwal
2011-03-08 15:01 ` kashish bhatia
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