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, 2 insertions, 3 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index c0ca9c3723c0..4e57fe68e4b9 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -157,7 +157,6 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
         key.objectid = inode->i_ino;
         key.offset = start;
         btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
-        inode_add_bytes(inode, size);
         datasize = btrfs_file_extent_calc_inline_size(cur_size);
 
         inode_add_bytes(inode, size);
@@ -920,8 +919,8 @@ static noinline int csum_exist_in_range(struct btrfs_root *root,
         struct btrfs_ordered_sum *sums;
         LIST_HEAD(list);
 
-        ret = btrfs_lookup_csums_range(root, bytenr, bytenr + num_bytes - 1,
-                                       &list);
+        ret = btrfs_lookup_csums_range(root->fs_info->csum_root, bytenr,
+                                       bytenr + num_bytes - 1, &list);
         if (ret == 0 && list_empty(&list))
                 return 0;