2.6.39 Kernel Changes for FileSystem, get_sb removed

[rohan puri]

On Tue, Sep 20, 2011 at 6:46 PM, kashish bhatia <koolest77 at gmail.com> wrote:

> Hi Abhijit,
>
> On Tue, Sep 20, 2011 at 5:14 PM, Abhijit Pawar <apawar.linux at gmail.com>wrote:
>
>>  Hi list,
>> It seems that the support for get_sb function is removed from kernel
>> 2.6.39 onwards. My code which is working till 2.6.38 series is failing with
>> new kernels.
>>
>>
>  The function "get_sb()" is still present in security/inode.c in kernel
> 2.6.39. Only the function pointer of get_sb() has been removed from
>
The name they have kept is the same in security/inode.c but you can compare
the prototype to earlier kernel versions. They will be different. Also its
assigned to mount function pointer field of struct file_system_type.

> struct file_system_type in /include/linux/fs.h.
>
> I tried finding out but there isnt anything mentioned. So if this function
>> itself is removed then how kernel is going to find out the superblock and
>> use it?
>>
>> Are we supposed to use the mount function provided? This is what i got
>> from one of the kernel patch email.
>>
>>
> Yes , you are supposed to use mount function.
> visit the following link :
> http://lxr.linux.no/#linux+v2.6.39/security/inode.c#L144<http://lxr.linux.no/#linux+v2.6.39/security/inode.c%23L144>
>
>  +[mandatory]
>> +	->get_sb() is gone.  Switch to use of ->mount().  Typically it's just
>> +a matter of switching from calling get_sb_... to mount_... and changing the
>> +function type.  If you were doing it manually, just switch from setting ->mnt_root
>> +to some pointer to returning that pointer.  On errors return ERR_PTR(...).
>> diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
>>
>>
>> It looks like there are other changes related to Pages are also done.
>>
>>
>> Regards,
>> Abhijit Pawar
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>>
>
>
> --
> Regards,
> Kashish
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
Regards,
Rohan Puri
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110920/d7db0443/attachment.html