Ceph » CephFS

To add an additional layer of protection for files I would like to see
support for the chattr +i command added for files stored in cephfs

Multiple emails were posted to the ceph mail list on this subject including:

http://article.gmane.org/gmane.comp.file-systems.ceph.user/16836
http://article.gmane.org/gmane.comp.file-systems.ceph.user/16848
http://article.gmane.org/gmane.comp.file-systems.ceph.user/16856
http://article.gmane.org/gmane.comp.file-systems.ceph.user/16861

Of the suggestions made on the mail list, I like Sage's where he states:

It seems like we should be checking S_IMMUTABLE in the MDS and,
when set, refusing to issue write caps.

Which I think is better then just trusting the clients to do the
checking.