Btrfs: tree logging checksum fixes

This patch contains following things.

1) Limit the max size of btrfs_ordered_sum structure to PAGE_SIZE.  This
struct is kmalloced so we want to keep it reasonable.

2) Replace copy_extent_csums by btrfs_lookup_csums_range.  This was
duplicated code in tree-log.c

3) Remove replay_one_csum. csum items are replayed at the same time as
   replaying file extents. This guarantees we only replay useful csums.

4) nbytes accounting fix.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 171ca30a3755..293da650873f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5579,7 +5579,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len)
         BUG_ON(ordered->file_offset != file_pos || ordered->len != len);
 
         disk_bytenr = file_pos + BTRFS_I(inode)->index_cnt;
-        ret = btrfs_lookup_csums_range(root, disk_bytenr,
+        ret = btrfs_lookup_csums_range(root->fs_info->csum_root, disk_bytenr,
                                        disk_bytenr + len - 1, &list);
 
         while (!list_empty(&list)) {