Hi- I asked a couple of filesystem/kernel higher-ups. Client: A kernel message at module load time sounds like a good idea, along with a target date when we would consider a "go/no-go" decision for removing NFSv2. I also agree we should solicit opinion from other Linux distributors. For the server, similar arrangements for a kernel message might be made. And a conversation with other NFS storage vendors (for example, at testing events) seems reasonable. Begin forwarded message: > From: Chris Mason <chris.mason@xxxxxxxxxxxx> > Subject: Re: file system deprecation question > Date: July 8, 2013 11:43:40 AM EDT > To: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>, Chuck Lever <chuck.lever@xxxxxxxxxx> > > Quoting Greg KH (2013-07-08 11:39:31) >> On Mon, Jul 08, 2013 at 10:30:43AM -0400, Chuck Lever wrote: >>> Thanks, I've copied Greg. >>> >>> The idea is Linux would prevent the use of the oldest version of NFS. >>> Only NFSv3 and later would be supported in the client. The Linux NFS >>> community doesn't want to bother with NFSv2 any more because they feel >>> there are very few people using it due to its inherent limitations. >>> >>> Recently Bryan Schumaker did some work to modularize the NFS client so >>> code specific to each NFS protocol version has been moved to its own >>> .ko. I assume we would just move that code to the staging tree, but >>> it may be more complicated than that. >> >> Yes, you can remove drivers from the kernel tree through staging, but >> really, it's just as easy for you to delete them entirely if you want to >> from your directory. >> >> Like Chris said, have them print a big nasty warning every time the >> driver is loaded for a year or so, then remove it if no one complains. >> But if someone is still using it, you really can't remove it. Heck, we >> still have filesystems that are way older than NFSv2 in the kernel >> because they have users, I doubt you will be able to drop this code >> anytime soon, sorry. > > I go even farther than the warning, and after a few releases of the scary > warning make them mount with -o iknownfsv2isgoingway > > You'll also want rhel/suse on board. It doesn't help if its gone from > mainline and they just port it into the enterprise distro. > > -chris > -- Chuck Lever chuck[dot]lever[at]oracle[dot]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
