Btrfs: Add data=ordered support

This forces file data extents down the disk along with the metadata that
references them.  The current implementation is fairly simple, and just
writes out all of the dirty pages in an inode before the commit.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index eef840bca91e..c157ddbe9d1e 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -16,9 +16,10 @@
  * Boston, MA 021110-1307, USA.
  */
 
-#ifndef __TRANSACTION__
-#define __TRANSACTION__
+#ifndef __BTRFS_TRANSACTION__
+#define __BTRFS_TRANSACTION__
 #include "btrfs_inode.h"
+#include "ordered-data.h"
 
 struct btrfs_transaction {
         u64 transid;
@@ -30,6 +31,7 @@ struct btrfs_transaction {
         struct list_head list;
         struct extent_map_tree dirty_pages;
         unsigned long start_time;
+        struct btrfs_ordered_inode_tree ordered_inode_tree;
         wait_queue_head_t writer_wait;
         wait_queue_head_t commit_wait;
 };
@@ -90,4 +92,6 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
 int btrfs_clean_old_snapshots(struct btrfs_root *root);
 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
                              struct btrfs_root *root);
+int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
+                                struct btrfs_root *root);
 #endif