cephfs-mirror: disallow adding a active peered file system back to its source
3 - minor
Pull request ID:
Crash signature (v1):
Crash signature (v2):
cephfs-mirror is unidirectional atm. So, If (cluster2, fs) is an active peer for (cluster1, fs), disallow adding (cluster1, fs) as a peer for (cluster2, fs).
Note that, once the peer relationship is removed, this is fine.