linux-kernel - Re: [PATCH 10/39] ocfs2: Add helper function in uptodate.c for removing xattr clusters

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Message-ID: <20081007201820.GC26373@wotan.suse.de>
Date:	Tue, 7 Oct 2008 13:18:20 -0700
From:	Mark Fasheh <mfasheh@...e.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, joel.becker@...cle.com,
	ocfs2-devel@....oracle.com, linux-fsdevel@...r.kernel.org,
	tao.ma@...cle.com
Subject: Re: [PATCH 10/39] ocfs2: Add helper function in uptodate.c for removing xattr clusters

On Wed, Oct 01, 2008 at 11:11:56PM -0700, Andrew Morton wrote:
> > On Wed, 24 Sep 2008 15:00:51 -0700 Mark Fasheh <mfasheh@...e.com> wrote:
> > +/* Called when we remove xattr clusters from an inode. */
> > +void ocfs2_remove_xattr_clusters_from_cache(struct inode *inode,
> > +					    sector_t block,
> > +					    u32 c_len)
> > +{
> > +	u64 i, b_len = ocfs2_clusters_to_blocks(inode->i_sb, 1) * c_len;
> > +
> > +	for (i = 0; i < b_len; i++, block++)
> > +		ocfs2_remove_block_from_cache(inode, block);
> > +}
> 
> I really really hope that `i' and `b_len' didn't really need to be
> 64-bit here.

Yeah, there's no way currently that any of those variables should get even
close to that large. I made them unsigned ints with the patch below.
	--Mark

--
Mark Fasheh

From: Mark Fasheh <mfasheh@...e.com>

ocfs2: use smaller counters in ocfs2_remove_xattr_clusters_from_cache

i and b_len don't really need to be u64's. Xattr extent lengths should be
limited by the VFS, and then the size of our on-disk length field.

Signed-off-by: Mark Fasheh <mfasheh@...e.com>
---
 fs/ocfs2/uptodate.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index 5235140..187b99f 100644
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -562,7 +562,7 @@ void ocfs2_remove_xattr_clusters_from_cache(struct inode *inode,
 					    sector_t block,
 					    u32 c_len)
 {
-	u64 i, b_len = ocfs2_clusters_to_blocks(inode->i_sb, 1) * c_len;
+	unsigned int i, b_len = ocfs2_clusters_to_blocks(inode->i_sb, 1) * c_len;
 
 	for (i = 0; i < b_len; i++, block++)
 		ocfs2_remove_block_from_cache(inode, block);
-- 
1.5.4.1

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