On 07/09/2009 10:51 AM, Nick Piggin wrote:
> On Wed, Jul 08, 2009 at 07:07:17PM +0300, Boaz Harrosh wrote:
>> On 07/08/2009 03:34 PM, Nick Piggin wrote:
>>> On Wed, Jul 08, 2009 at 06:47:01AM -0400, Christoph Hellwig wrote:
>>> Index: linux-2.6/fs/attr.c
>>> ===================================================================
>>> --- linux-2.6.orig/fs/attr.c
>>> +++ linux-2.6/fs/attr.c
>>> @@ -112,7 +112,12 @@ int inode_setattr(struct inode * inode,
>>>
>>> if (ia_valid & ATTR_SIZE &&
>>> attr->ia_size != i_size_read(inode)) {
>>> - int error = vmtruncate(inode, attr->ia_size);
>>> + int error;
>>> +
>>> + if (inode->i_op->new_truncate)
>>> + error = simple_setsize(inode, attr->ia_size);
>> I don't understand this branch.
>> If a filesystem has been converted to set "i_op->new_truncate=true"
>> then it must have been converted to intersect ->setattr and has set
>> the i_size (And needs to clear ATTR_SIZE, why?)
>>
>> All other cases of systems not converted, or systems that do not have
>> ->truncate will fall to the "else" part.
>>
>> before the removal of i_op->new_truncate you will need to do something
>> with the systems that do not have ->truncate which will be a
>> .setattr = simple_setattr or something
>>
>> So I don't understand this conditional
>
> inode_setattr *is* our "simple_setattr".
>
I wish you would split it.
one - helper to be called by converted file systems
(Which just ignores the ATTR_SIZE)
second - to be set into .setattr which does the simple_setsize + above.
More clear for FS users like me (and that ugly unmask of ATTR_SIZE)
or it's just me?
Thanks
Boaz
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