Re: [LIP] problem with fcntl while locking file on NFS

Gaurav Varshney posted in linux-india-programmers:
> Binand,
> 
> I tried with "ssll" instead of "ssLL" but still 
> facing the same problem -
> 
>   "INFO    >> Could not lock file Invalid argument"
> 
> 
> I am not sure about nfs server, but i am not dealing
> with large files. BTW, i tried handling the EINVAL in
> the same way as i am handling EINTR, but this ended 
> up in an infinite loop and process got hung (strace
> showed it was in an infinite loop).

You didn't mention your NFS server/client versions.

Further, do you have the nfslock service running to the server and
client? Run rpcinfo -p and look for nlockmgr. The NFS protocol itself
has no support for file locking, you need this additional RPC service
to implement file locking over NFS.

http://www.hn.edu.cn/book/NetWork/NetworkingBookshelf_2ndEd/nfs/ch11_02.htm

(Looks like an illegal copy of the book, please buy an O'Reilly book today!)

Binand

-- 
Hanlon's Razor: Never attribute to malice that which can be adequately
explained by stupidity.
Bruce's Razor: Never attribute to stupidity that which can be adequately
explained by Microsoft funding.


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