On Wed, 2013-05-15 at 16:19 -0400, J. Bruce Fields wrote: > On Tue, May 14, 2013 at 02:15:26PM -0700, Zach Brown wrote: > > This crude patch illustrates the simplest plumbing involved in > > supporting sys_call_range with the NFS COPY operation that's pending in > > the 4.2 draft spec. > > > > The patch is based on a previous prototype that used the COPY op to > > implement sys_copyfileat which created a new file (based on the ocfs2 > > reflink ioctl). By contrast, this copies file contents between existing > > files. > > > > There's still a lot of implementation and testing to do, but this can > > get discussion going. > > I'm using: > > git://github.com/loghyr/NFSv4.2 > > as my reference for the draft protocol. > > On a quick skim, one thing this is missing before it complies is a > client implementation of CB_OFFLOAD: "If a client desires an > intra-server file copy, then it MUST support the COPY and CB_OFFLOAD > operations." Note that Bryan is currently working on updating the NFS implementation to match the draft protocol. -- Trond Myklebust Linux NFS client maintainer NetApp Trond.Myklebust@xxxxxxxxxx www.netapp.com -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
