Re: [PATCH v2 00/13] Introduce offline fsid/chunk tree uuid change for btrfstune.

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On Mon, May 11, 2015 at 04:08:41PM +0800, Qu Wenruo wrote:
> This patchset will introduce offline fsid/chunk tree uuid change
> function to 'btrfs property' command, with "fsid" and "chunk_tree_uuid"
> respectively.

One more thing: the goal is to change the filesystem uuid, the chunk
tree uuid should be changed as well. But I think both uuids have to be
changed at the same time and the chunk tree uuid should be generated
randomly as it's entirely internal value.

> To avoid such problem, we introduce new btrfs super flags:
> BTRFS_SUPER_FLAG_CHANGING_FSID and BTRFS_SUPER_FLAG_CHANGING_CHUNK_TREE_ID

Based on that, the separate BTRFS_SUPER_FLAG_CHANGING_CHUNK_TREE_ID flag
does not make sense and could be dropped.
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