Hi, I'm working on adding Samba integration with CephFS snapshots, so that they can be accessed in Explorer via file/folder right-click -> restore previous versions. For this we need return a list of "@GMT-%Y.%m.%d-%H.%M.%S" labels back to SMB clients in response to snapshot enumeration requests, where each label corresponds to a snapshot. To avoid the requirement for special @GMT-* snapshot naming in the .snap directory, I'd hoped to determine the snapshot creation time from the stat.btime field and return a label based on that. However, snapshot btime fields appear to directly reference the btime of the snapshot source. Is there any way to determine the snapshot creation time? If not, would anyone object to me adding a new xattr which carries this information, e.g. "ceph.snap.btime", assuming the value is stored somewhere on the MDS? Cheers, David
