btrfs-progs: add function to stringify filesystem features

[platform/upstream/btrfs-progs.git] / extent_io.h

diff --git a/extent_io.h b/extent_io.h
index acc316e..27c4b69 100644 (file)
--- a/extent_io.h
+++ b/extent_io.h
@@ -16,8 +16,8 @@
  * Boston, MA 021110-1307, USA.
  */
 
-#ifndef __EXTENTMAP__
-#define __EXTENTMAP__
+#ifndef __BTRFS_EXTENT_IO_H__
+#define __BTRFS_EXTENT_IO_H__
 
 #if BTRFS_FLAT_INCLUDES
 #include "kerncompat.h"
@@ -100,10 +100,28 @@ int set_extent_dirty(struct extent_io_tree *tree, u64 start,
                     u64 end, gfp_t mask);
 int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
                       u64 end, gfp_t mask);
-int extent_buffer_uptodate(struct extent_buffer *eb);
-int set_extent_buffer_uptodate(struct extent_buffer *eb);
-int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
-                               struct extent_buffer *eb);
+static inline int set_extent_buffer_uptodate(struct extent_buffer *eb)
+{
+       eb->flags |= EXTENT_UPTODATE;
+       return 0;
+}
+
+static inline int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
+                               struct extent_buffer *eb)
+{
+       eb->flags &= ~EXTENT_UPTODATE;
+       return 0;
+}
+
+static inline int extent_buffer_uptodate(struct extent_buffer *eb)
+{
+       if (!eb || IS_ERR(eb))
+               return 0;
+       if (eb->flags & EXTENT_UPTODATE)
+               return 1;
+       return 0;
+}
+
 int set_state_private(struct extent_io_tree *tree, u64 start, u64 xprivate);
 int get_state_private(struct extent_io_tree *tree, u64 start, u64 *xprivate);
 struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,