From: Liu Hui <onlyflyer@gmail.com>
Date: Tue, 2 Dec 2008 01:31:40 +0000 (-0500)
Subject: Btrfs: Fix cow semantic in run_delalloc_nocow()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ce397c0616de9bfb678569f1dfa655838a711594;p=openwrt%2Fstaging%2Fblogic.git

Btrfs: Fix cow semantic in run_delalloc_nocow()

The file preallocation code reversed the logic to force nodatacow.
This fixes it.
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 7a8ad4292f75..b3d4078b69a6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1114,10 +1114,10 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
 	if (btrfs_test_opt(root, NODATACOW) ||
 	    btrfs_test_flag(inode, NODATACOW))
 		ret = run_delalloc_nocow(inode, locked_page, start, end,
-					 page_started, 0, nr_written);
+                                        page_started, 1, nr_written);
 	else if (btrfs_test_flag(inode, PREALLOC))
 		ret = run_delalloc_nocow(inode, locked_page, start, end,
-					 page_started, 1, nr_written);
+                                        page_started, 0, nr_written);
 	else
 		ret = cow_file_range_async(inode, locked_page, start, end,
 				     page_started, nr_written);