From: Josef Bacik <jbacik@fusionio.com>
Date: Thu, 21 Feb 2013 20:28:28 +0000 (-0500)
Subject: Btrfs: make sure NODATACOW also gets NODATASUM set
X-Git-Tag: v3.9-rc1~4^2~22
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f2bdf9a8f79052e9577936cbe5696c0e232aa0e3;p=profile%2Fcommon%2Fkernel-common.git

Btrfs: make sure NODATACOW also gets NODATASUM set

A user reported hitting the BUG_ON() in btrfs_finished_ordered_io() where we had
csums on a NOCOW extent.  This can happen if we have NODATACOW set but not
NODATASUM set, which can happen in two cases, either we mount with -o nodatacow
and then write into preallocated space, or chattr +C a directory and move a file
into that directory.  Liu has fixed the move case in a different place, but this
fixes the mount -o nodatacow case.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 40d49da..14c82cd 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5574,7 +5574,8 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
 		if (btrfs_test_opt(root, NODATASUM))
 			BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
 		if (btrfs_test_opt(root, NODATACOW))
-			BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW;
+			BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW |
+				BTRFS_INODE_NODATASUM;
 	}
 
 	insert_inode_hash(inode);