Btrfs: fix delalloc checks in clone ioctl

The lookup_first_ordered_extent() was done on the wrong inode, and the
->delalloc_bytes test was wrong, as the following
btrfs_wait_ordered_range() would only invoke a range write and wouldn't
write the entire file data range. Also, a bad parameter was passed to
btrfs_wait_ordered_range().

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 60f662c4778b..d94bef5179fc 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1520,13 +1520,15 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
         while (1) {
                 struct btrfs_ordered_extent *ordered;
                 lock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
-                ordered = btrfs_lookup_first_ordered_extent(inode, off+len);
-                if (BTRFS_I(src)->delalloc_bytes == 0 && !ordered)
+                ordered = btrfs_lookup_first_ordered_extent(src, off+len);
+                if (!ordered &&
+                    !test_range_bit(&BTRFS_I(src)->io_tree, off, off+len,
+                                   EXTENT_DELALLOC, 0, NULL))
                         break;
                 unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
                 if (ordered)
                         btrfs_put_ordered_extent(ordered);
-                btrfs_wait_ordered_range(src, off, off+len);
+                btrfs_wait_ordered_range(src, off, len);
         }
 
         /* clone data */