Btrfs: create a logical->phsyical block number mapping scheme

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 2972aaa9eb7..4ff0cc1efb1 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1700,7 +1700,7 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
         leaf = btrfs_buffer_leaf(subvol);
         btrfs_set_header_nritems(&leaf->header, 0);
         btrfs_set_header_level(&leaf->header, 0);
-        btrfs_set_header_blocknr(&leaf->header, subvol->b_blocknr);
+        btrfs_set_header_blocknr(&leaf->header, bh_blocknr(subvol));
         btrfs_set_header_generation(&leaf->header, trans->transid);
         memcpy(leaf->header.fsid, root->fs_info->disk_super->fsid,
                sizeof(leaf->header.fsid));
@@ -1713,7 +1713,7 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen)
         btrfs_set_inode_nblocks(inode_item, 1);
         btrfs_set_inode_mode(inode_item, S_IFDIR | 0755);
 
-        btrfs_set_root_blocknr(&root_item, subvol->b_blocknr);
+        btrfs_set_root_blocknr(&root_item, bh_blocknr(subvol));
         btrfs_set_root_refs(&root_item, 1);
 
         mark_buffer_dirty(subvol);
@@ -1803,7 +1803,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
         key.offset = 1;
         key.flags = 0;
         btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
-        btrfs_set_root_blocknr(&new_root_item, root->node->b_blocknr);
+        btrfs_set_root_blocknr(&new_root_item, bh_blocknr(root->node));
 
         ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
                                 &new_root_item);