On 03/06/2012 11:11 AM, Anshul Kundra wrote:
> To Developers ,
>
>
>
> Please provide me some description regarding the xfs_getbmap what it
> suppose to do , suppose I want to create a fiule and write on it I got
> the inode of file then what fields I will send to the xfs getbmap
> (called via xfs_ioc_getbmapx ) ,
Please see the "XFS_IOC_GETBMAP" section in the xfsctl(3) man page.
-Eric
> - What fields of getbmapx structure will be initialized before
> passing in the xfs_ioc_getbmapx ?
>
> - What it will do after passing the fields (Function overview
> if possible)
>
> - Why the arg+1 is being passed in the xfs_ioc_getbmapx
>
> I know the reason of formatter
>
>
>
> Xfs_ioc_getbmapx(arguments)
>
> {
>
>
>
> Xfs_getbmap();
>
> Copy_to_user() ; // why the copying done here as in the function
> itself for every entry it is copying the information into user buffer
> then why outside the function call here it needs the copy again
>
> }
>
>
>
> Thanks & Best Regards
>
> Anshul Kundra
>
>
> ------------------------------------------------------------------------
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