Ceph » CephFS

Adding a new entity with root_squash in its caps works as expected -

$ ./bin/ceph fs authorize a client.y / rw root_squash
[client.y]
        key = AQCnT8tl3+1BMhAAUeusXXLxRC9Q/KzHQToUag==
        caps mds = "allow rw fsname=a root_squash" 
        caps mon = "allow r fsname=a" 
        caps osd = "allow rw tag cephfs data=a" 

But adding root_squash to a MDS caps in a entity keyring that already exists doesn't work -

$ ./bin/ceph fs authorize a client.x / rw
[client.x]
        key = AQBaT8tlCWc8ARAAAt9Y/PCPaa/UJ3QhEcJtKQ==
        caps mds = "allow rw fsname=a" 
        caps mon = "allow r fsname=a" 
        caps osd = "allow rw tag cephfs data=a" 
$ ./bin/ceph fs authorize a client.x / rw root_squash
no update for caps of client.x
$ ./bin/ceph auth get client.x
[client.x]
        key = AQBaT8tlCWc8ARAAAt9Y/PCPaa/UJ3QhEcJtKQ==
        caps mds = "allow rw fsname=a" 
        caps mon = "allow r fsname=a" 
        caps osd = "allow rw tag cephfs data=a" 

This shouldn't be the case since it is possible to update the caps assigned to an entity using ceph fs authorize command. Like other parts of the MDS cap, it should be possible to update the value of this root_squash too.