btrfs userspace question - where's the utility to dump/restore?

[Valdis Kletnieks]

So I'm looking at playing with btrfs, and I start looking at the
userspace pieces I'll need.  What I can't find is an equivalent
of the ext[34] "dump/restore" package to dump data to an external
backup device. Is 'tar cf --acls --selinux --xattrs /external/fs.dump'
as good as it gets, or is something else recommended?

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