2.6.39 Kernel Changes for FileSystem, get_sb removed
rohan.puri15 at gmail.com
Tue Sep 20 09:24:29 EDT 2011
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 :
>> + ->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.
>> Abhijit Pawar
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
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