i_block field

i_block field

[Ganesh Patil]

Hello,

      I have printed the i_blocks[EXT4_N_BLOCKS] filed from ext4_inode
structure. of my file (a.txt);

code:
 ret= ext4_get_inode_loc(d_inode1, &iloc);
 e4_inode= ext4_raw_inode(&iloc);
 for(i=0;i<5;i++)
       {
            printk(KERN_INFO "%d",e4_inode->i_block[i]);
      }

  I got the following result.:

 127754
 4
 0
 0
 1
 8705

 what is the 127754 (Address of extent or data block)?
 what is 8705 &1 ?


-- 
Regards,
Ganesh Patil.
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i_block field

[Pritam Bankar]

May I know what is  e4_inode ?

Thanks,
Pritam

On Mon, Mar 12, 2012 at 6:51 PM, Ganesh Patil <patil.ganesh170@gmail.com>wrote:

> Hello,
>
>       I have printed the i_blocks[EXT4_N_BLOCKS] filed from ext4_inode
> structure. of my file (a.txt);
>
> code:
>  ret= ext4_get_inode_loc(d_inode1, &iloc);
>  e4_inode= ext4_raw_inode(&iloc);
>  for(i=0;i<5;i++)
>        {
>             printk(KERN_INFO "%d",e4_inode->i_block[i]);
>       }
>
>   I got the following result.:
>
>  127754
>  4
>  0
>  0
>  1
>  8705
>
>  what is the 127754 (Address of extent or data block)?
>  what is 8705 &1 ?
>
>
> --
> Regards,
> Ganesh Patil.
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>


-- 

Pritam Bankar
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i_block field

[Ganesh Patil]

On Mon, Apr 2, 2012 at 5:59 PM, Pritam Bankar <pritambankar1988@gmail.com>wrote:

> May I know what is  e4_inode ?
>
> Thanks,
> Pritam
>
> On Mon, Mar 12, 2012 at 6:51 PM, Ganesh Patil <patil.ganesh170@gmail.com>wrote:
>
>> Hello,
>>
>>       I have printed the i_blocks[EXT4_N_BLOCKS] filed from ext4_inode
>> structure. of my file (a.txt);
>>
>> code:
>>  ret= ext4_get_inode_loc(d_inode1, &iloc);
>>  e4_inode= ext4_raw_inode(&iloc);
>>  for(i=0;i<5;i++)
>>        {
>>             printk(KERN_INFO "%d",e4_inode->i_block[i]);
>>       }
>>
>>   I got the following result.:
>>
>>  127754
>>  4
>>  0
>>  0
>>  1
>>  8705
>>
>>  what is the 127754 (Address of extent or data block)?
>>  what is 8705 &1 ?
>>
>>
>> --
>> Regards,
>> Ganesh Patil.
>>
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>>
>
>
> --
>
> Pritam Bankar
>


Above e4_inode field is the pointer of type struct ext4_inode i.e on disk
structure of ext4 inode. i.e

 Struct ext4_inode *e4_inode=ext4_raw_inode(&iloc);

      Sir, but for above question I got answer. because i copied first 12
byte of i_block[..] to ext4_header structure and next 12 bytes in to
ext4_extent.so from that I got actual physical block numbers.

 struct ext4_extent_header *eeh = (struct
ext4_extent_header*)EXT4_I(d_inode1)->i_data;
struct ext4_extent *eex=eex = EXT_FIRST_EXTENT(eeh);
-- 
Regards,
Ganesh Patil.
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