On Fri, Oct 19, 2018 at 11:28:52AM -0400, Olga Kornievskaia wrote: > This patch series adds support for NFSv4.2 copy offload feature > allowing copy between two different NFS servers. Apologies, it may take me another week or so to get to this.... This is the part that sounds trickiest!: > On the destination server, upon receiving a COPY request, the server > establishes the necessary clientid/session with the source server. > It calls into the NFS client code to establish the necessary > open stateid, filehandle, file description (without doing an NFS open). > Then the server calls into the copy_file_range() to preform the copy > where the source file will issue NFS READs and then do local file > system writes (this depends on the VFS ability to do cross device > copy_file_range(). --b.
