[Ocfs2-devel] [PATCH 06/10] ocfs2: Use struct ocfs2_extent_tree in ocfs2_num_free_extents().

[TaoMa <tao.ma@oracle.com>]

Joel Becker wrote:
> On Thu, Aug 21, 2008 at 12:10:21PM +0800, TaoMa wrote:
>   
>> Joel Becker wrote:
>>     
>>> ocfs2_num_free_extents() re-implements the logic of
>>> ocfs2_get_extent_tree().  Now that ocfs2_get_extent_tree() does not
>>> allocate, let's use it in ocfs2_num_free_extents() to simplify the code.
>>>
>>> The inode validation code in ocfs2_num_free_extents() is not needed.
>>> All callers are passing in pre-validated inodes.
>>>
>>> Signed-off-by: Joel Becker <joel.becker@oracle.com>
>>> ---
>>>  fs/ocfs2/alloc.c |   30 +++++-------------------------
>>>  1 files changed, 5 insertions(+), 25 deletions(-)
>>>
>>> diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
>>> index fb6ae67..0b900f6 100644
>>> --- a/fs/ocfs2/alloc.c
>>> +++ b/fs/ocfs2/alloc.c
>>> @@ -618,34 +618,13 @@ int ocfs2_num_free_extents(struct ocfs2_super *osb,
>>>  	struct ocfs2_extent_block *eb;
>>>  	struct buffer_head *eb_bh = NULL;
>>>  	u64 last_eb_blk = 0;
>>> +	struct ocfs2_extent_tree et;
>>>   	mlog_entry_void();
>>>  -	if (type == OCFS2_DINODE_EXTENT) {
>>> -		struct ocfs2_dinode *fe =
>>> -				(struct ocfs2_dinode *)root_bh->b_data;
>>> -		if (!OCFS2_IS_VALID_DINODE(fe)) {
>>> -			OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
>>> -			retval = -EIO;
>>> -			goto bail;
>>> -		}
>>> -
>>> -		if (fe->i_last_eb_blk)
>>> -			last_eb_blk = le64_to_cpu(fe->i_last_eb_blk);
>>> -		el = &fe->id2.i_list;
>>> -	} else if (type == OCFS2_XATTR_VALUE_EXTENT) {
>>> -		struct ocfs2_xattr_value_root *xv =
>>> -			(struct ocfs2_xattr_value_root *) obj;
>>> -
>>> -		last_eb_blk = le64_to_cpu(xv->xr_last_eb_blk);
>>> -		el = &xv->xr_list;
>>> -	} else if (type == OCFS2_XATTR_TREE_EXTENT) {
>>> -		struct ocfs2_xattr_block *xb =
>>> -			(struct ocfs2_xattr_block *)root_bh->b_data;
>>> -
>>> -		last_eb_blk = le64_to_cpu(xb->xb_attrs.xb_root.xt_last_eb_blk);
>>> -		el = &xb->xb_attrs.xb_root.xt_list;
>>> -	}
>>> +	ocfs2_get_extent_tree(&et, inode, root_bh, type, obj);
>>>   
>>>       
>> call eo_sanity_check first may be better since there is a check above in  
>> OCFS2_DINODE_EXTENT.
>>     
>
> 	Every dinode caller has already checked the inode.  I looked at
> them before I removed the IS_VALID_INODE().  That's what I meant in the
> commit message.
>   
OK.
Signed-off-by: Tao Ma <tao.ma@oracle.com>