From: Yan, Zheng <yanzheng@21cn.com>
Date: Mon, 28 Dec 2009 05:01:58 +0000 (+0000)
Subject: Btrfs: align offsets for btrfs_ordered_update_i_size
X-Git-Tag: v2.6.32.19~53
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e00818493b94468d30f5be73221e60d19ce85dd2;p=karo-tx-linux.git

Btrfs: align offsets for btrfs_ordered_update_i_size

commit a038fab0cb873c75d6675e2bcffce8a3935bdce7 upstream.

Some callers of btrfs_ordered_update_i_size can now pass in
a NULL for the ordered extent to update against.  This makes
sure we properly align the offset they pass in when deciding
how much to bump the on disk i_size.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Acked-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index b10a49d4bc6a..5c2a9e78a949 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -626,6 +626,8 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
 
 	if (ordered)
 		offset = entry_end(ordered);
+	else
+		offset = ALIGN(offset, BTRFS_I(inode)->root->sectorsize);
 
 	mutex_lock(&tree->mutex);
 	disk_i_size = BTRFS_I(inode)->disk_i_size;