From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wendy Cheng Date: Thu, 14 Sep 2006 00:40:18 -0400 Subject: [Cluster-devel] [PATCH 0/4 Revised] NLM lock failover Message-ID: <4508DD32.401@redhat.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit The revised patches address the issues discussed in previous review: https://www.redhat.com/archives/cluster-devel/2006-August/msg00194.html. The changes made are mostly for grace period fsid list that was previously implemented as a single linked list. It is now a double linked list with max entries count set to 128. Quick How-to: 1) Failover server exports filesystem with "fsid" option as: /etc/exports entry> /mnt/ext3/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> rpc.statd -n floating_ip_address -N -P recovery_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: (for reference purpose) user mode rpc.statd patch -- Wendy