From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-yh0-f41.google.com ([209.85.213.41]:34560 "EHLO mail-yh0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754765Ab3KNQf4 (ORCPT ); Thu, 14 Nov 2013 11:35:56 -0500 Received: by mail-yh0-f41.google.com with SMTP id f11so1143064yha.0 for ; Thu, 14 Nov 2013 08:35:55 -0800 (PST) Subject: [PATCH] nfs(5): Document the "migration" mount option To: steved@redhat.com From: Chuck Lever Cc: linux-nfs@vger.kernel.org Date: Thu, 14 Nov 2013 11:35:53 -0500 Message-ID: <20131114163552.19821.30799.stgit@manray.1015granger.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: Support for NFSv4 migration was merged in 3.13. Signed-off-by: Chuck Lever --- utils/mount/nfs.man | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man index 2a42b93..8535aec 100644 --- a/utils/mount/nfs.man +++ b/utils/mount/nfs.man @@ -855,6 +855,26 @@ In the presence of multiple client network interfaces, special routing policies, or atypical network topologies, the exact address to use for callbacks may be nontrivial to determine. +.TP 1.5i +.BR migration " / " nomigration +Selects whether the client uses an identification string that is compatible +with NFSv4 Transparent State Migration (TSM). +If the mounted server supports NFSv4 migration with TSM, specify the +.B migration +option. +.IP +Some server features misbehave in the face of a migration-compatible +identification string. +The +.B nomigration +option retains the use of a traditional client indentification string +which is compatible with legacy NFS servers. +This is also the behavior if neither option is specified. +A client's open and lock state cannot be migrated transparently +when it identifies itself via a traditional identification string. +.IP +This mount option has no effect with NFSv4 minor versions newer than zero, +which always use TSM-compatible client identification strings. .SH nfs4 FILE SYSTEM TYPE The .BR nfs4