Hi Ced, On Sun, Nov 19, 2023 at 11:58 AM Cedric Blancher <cedric.blancher@xxxxxxxxx> wrote: > > On Sat, 18 Nov 2023 at 13:01, Jeff Layton <jlayton@xxxxxxxxxx> wrote: > > > > On Sat, 2023-11-18 at 08:53 +0100, Cedric Blancher wrote: > > > Good morning! > > > > > > What are the differences between NFSv4.1 and NFSv4.2 for a NFSv4 > > > client, if we ignore server-side copy and READ_PLUS support? > > > Can a NFSv4.1 client then identify itself als NFSv4.2 client? > > > > > > > Yes. I believe that NFSv4.2 consists entirely of optional features over > > NFSv4.1, so it's legitimate for a client or server to advertise itself > > as a v4.2 capable, but support none of the features. > > Can anyone confirm this? So NFSv4.2 does not require protocol minor > version negotiation, or how does it work? I can confirm this. When mounting with NFS v4.2, the client will detect if the server doesn't support one of the new operations (by the server returning NFS4ERR_NOTSUPP) and will remember not to try it again. Anna > > Ced > -- > Cedric Blancher <cedric.blancher@xxxxxxxxx> > [https://plus.google.com/u/0/+CedricBlancher/] > Institute Pasteur
