Btrfs: set EXTENT_BOUNDARY bit before marking extent delalloc.

There is a race in relocate_inode_pages, it happens when
find_delalloc_range finds the delalloc extent before the
boundary bit is set. Thank you,

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 274bb91efa22..fe0e59ab33cc 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3994,10 +3994,10 @@ again:
                 }
                 set_page_extent_mapped(page);
 
-                btrfs_set_extent_delalloc(inode, page_start, page_end);
                 if (i == first_index)
                         set_extent_bits(io_tree, page_start, page_end,
                                         EXTENT_BOUNDARY, GFP_NOFS);
+                btrfs_set_extent_delalloc(inode, page_start, page_end);
 
                 set_page_dirty(page);
                 total_dirty++;
@@ -4405,7 +4405,7 @@ static int noinline get_new_locations(struct inode *reloc_inode,
                 path->slots[0]++;
         }
 
-        WARN_ON(cur_pos + offset > last_byte);
+        BUG_ON(cur_pos + offset > last_byte);
         if (cur_pos + offset < last_byte) {
                 ret = -ENOENT;
                 goto out;
@@ -5712,7 +5712,6 @@ next:
         if (pass == 0) {
                 btrfs_wait_ordered_range(reloc_inode, 0, (u64)-1);
                 invalidate_mapping_pages(reloc_inode->i_mapping, 0, -1);
-                WARN_ON(reloc_inode->i_mapping->nrpages);
         }
 
         if (total_found > 0) {