btrfs-progs: convert: Strictly avoid meta or system chunk allocation

Before this patch, btrfs-convert only rely on large enough initial
system/metadata chunk size to ensure no newer system/meta chunk will be
created.

But that's not safe enough. So add two new members in fs_info,
avoid_sys/meta_chunk_alloc flags to prevent any newer system or meta
chunks to be created before init_btrfs_v2().

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/ctree.h b/ctree.h
index cccbd5ba..c1534fa3 100644
--- a/ctree.h
+++ b/ctree.h
@@ -1032,6 +1032,8 @@ struct btrfs_fs_info {
 	unsigned int suppress_check_block_errors:1;
 	unsigned int ignore_fsid_mismatch:1;
 	unsigned int ignore_chunk_tree_error:1;
+	unsigned int avoid_meta_chunk_alloc:1;
+	unsigned int avoid_sys_chunk_alloc:1;
 
 	int (*free_extent_hook)(struct btrfs_trans_handle *trans,
 				struct btrfs_root *root,