From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wendy Cheng Date: Thu, 05 Apr 2007 17:50:55 -0400 Subject: [Cluster-devel] [PATCH 0/4 Revised] NLM - lock failover Message-ID: <46156F3F.3070606@redhat.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Revised patches based on 2.6.21-rc4 kernel and nfs-utils-1.1.0-rc1 that address issues discussed in: https://www.redhat.com/archives/cluster-devel/2006-September/msg00034.html Quick How-to: 1) Failover server exports filesystem with "fsid" option as: /etc/exports entry> /mnt/shared/exports *(fsid=1234,sync,rw) 2) Failover server dispatch rpc.statd with "-H" option. 3) Failover server drops locks based on fsid by: shell> echo 1234 > /proc/fs/nfsd/nlm_unlock 4) Takeover server enters per fsid grace period by: shell> echo 1234 > /proc/fs/nfsd/nlm_set_igrace 5) Takeover server notifies clients for lock reclaim by: shell> /usr/sbin/sm-notify -f -v floating_ip_address -P an_sm_directory Patch Summary: 4-1: implement /proc/fs/nfsd/nlm_unlock 4-2: implement /proc/fs/nfsd/nlm_set_igrace 4-3: correctly record and pass incoming server ip interface into rpc.statd. 4-4: nfs-utils statd changes 4-1 includes an existing lockd bug fix as discussed in: http://sourceforge.net/mailarchive/forum.php?thread_name=4603506D.5040807%40redhat.com&forum_name=nfs (subject: [NFS] Question about f_count in struct nlm_file) 4-4 includes an existing nfs-utils statd bug fix as discussed in: http://sourceforge.net/mailarchive/message.php?msg_name=46142B4F.1030507%40redhat.com (subject: Re: [NFS] lockd and statd) Misc: o No IPV6 support due to testing efforts o NFS V3 only - will compare notes with CITI folks (NFS V4 issues) o Still need some error-inject tests. -- Wendy