[Cluster-devel] [RFC PATCH 1/3] NLM lock failover - lock release

[Wendy Cheng]

The patch piggy-backs the logic into "rq_daddr" field of struct svc_rqst 
where NFS server ip address is stored. Upon writing IPv4 address in 
standard dot notation into /proc/fs/nfsd/nlm_unlock, the logic will 
examine NLM's global nlm_files list and subsequently unlock the 
associated file if server ip address matches.

Due to the size of rq_daddr (u32), we would not be able to support IPV6 
for this round of changes. Another to-do item is to enable client:server 
ip pairs to allow NFS V4 failover.




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