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f6908420ad
bees explicitly supports storing $BEESHOME on another filesystem, and does not require that filesystem to be btrfs; however, if $BEESHOME is on a non-btrfs filesystem, there is an exception on every startup when trying to identify the subvol root of the hash table file in order to blacklist it, because non-btrfs filesystems don't have subvol roots. Fix by checking not only whether $BEESHOME is on btrfs, but whether it is on the _same_ btrfs, as the bees root, without throwing an exception. The hash table is blacklisted only when both filesystems are btrfs and have the same fsid. Signed-off-by: Zygo Blaxell <bees@furryterror.org>