[Ocfs2-devel] [PATCH] ocfs2: Remove the deprecated inode_setattr.

[Tao Ma <tao.ma@oracle.com>]

Joel Becker wrote:
> On Wed, Jun 09, 2010 at 04:48:20PM +0800, Tao Ma wrote:
>   
>> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
>> index 6a13ea6..06fd85c 100644
>> --- a/fs/ocfs2/file.c
>> +++ b/fs/ocfs2/file.c
>> @@ -1052,17 +1052,17 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
>>  	}
>>  
>>  	/*
>> -	 * This will intentionally not wind up calling simple_setsize(),
>> -	 * since all the work for a size change has been done above.
>> -	 * Otherwise, we could get into problems with truncate as
>> -	 * ip_alloc_sem is used there to protect against i_size
>> -	 * changes.
>> +	 * Since all the work for a size change has been done above,
>> +	 * we only need to call simple_setsize to update i_size.
>>  	 */
>> -	status = inode_setattr(inode, attr);
>> -	if (status < 0) {
>> -		mlog_errno(status);
>> -		goto bail_commit;
>> +	if (attr->ia_valid & ATTR_SIZE) {
>> +		status = simple_setsize(inode, attr->ia_size);
>> +		if (status < 0) {
>> +			mlog_errno(status);
>> +			goto bail_commit;
>> +		}
>>     
>
> 	Boy, this is a bit to think about.  The old code deliberately
> used vmtruncate() to update i_size and trim the pagecace, but because we
> didn't implement ->truncate() we knew that we wouldn't modify the
> (already adjusted) allocation.  Not buggy, Christoph, just a roundabout
> way to get the job done.
> 	The new simple_setsize() does nothing but update i_size and trim
> the pagecache, right Nick?  If that's so, that's all we need.
>   
yeah, the new simple_setsize did what you said.

Regards,
Tao