Hello,
The new space balancing code needs a subvol to store the
temporary inode for data extent relocation.
Regards
Yan Zheng
---
diff -r 35eb00b579c4 mkfs.c
--- a/mkfs.c Tue Sep 23 12:29:10 2008 -0400
+++ b/mkfs.c Thu Sep 25 21:50:51 2008 +0800
@@ -229,6 +229,32 @@
(allowed & data_profile));
BUG_ON(ret);
}
+ return 0;
+}
+
+static int create_data_reloc_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_key location;
+ struct btrfs_root_item root_item;
+ struct extent_buffer *tmp;
+ u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID;
+ int ret;
+
+ ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
+ BUG_ON(ret);
+
+ memcpy(&root_item, &root->root_item, sizeof(root_item));
+ btrfs_set_root_bytenr(&root_item, tmp->start);
+ btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
+ free_extent_buffer(tmp);
+
+ location.objectid = objectid;
+ location.type = BTRFS_ROOT_ITEM_KEY;
+ location.offset = trans->transid;
+ ret = btrfs_insert_root(trans, root->fs_info->tree_root,
+ &location, &root_item);
+ BUG_ON(ret);
return 0;
}
@@ -459,6 +485,9 @@
metadata_profile);
BUG_ON(ret);
+ ret = create_data_reloc_tree(trans, root);
+ BUG_ON(ret);
+
printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
"sectorsize %u size %s\n",
label, first_file, nodesize, leafsize, sectorsize,
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs"
in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html