nfs4 locks: What happens when a lease can't get renewed?

nfs4 locks: What happens when a lease can't get renewed?

[Nils Goroll]

Hi,

I wonder what happens if a lock on nfs4 has been acquired by an application (for
instance, using fcntl(fd, F_SETLK, F_WRLCK)) and the lock can't be RENEWed, for
instance due to a network outage preventing communication between the client and
the server.

I would have thought that some notification mechanism was useful, for instance
my means of delivery of a signal as set using F_SETOWN / F_SETSIG for leases.

I would highly appreciate helpful pointers should this question have already
been discussed of if there exists any other helpful documentation on it.

Thank you,

Nils

Re: nfs4 locks: What happens when a lease can't get renewed?

[Nils Goroll]

Hi,

I am reposting my question because I feel it is quite substantial. IMHO, some
mechanism to ensure data integrity is needed for "lost locks".

On 06/11/10 11:15 PM, Nils Goroll wrote:
> Hi,
> 
> I wonder what happens if a lock on nfs4 has been acquired by an application (for
> instance, using fcntl(fd, F_SETLK, F_WRLCK)) and the lock can't be RENEWed, for
> instance due to a network outage preventing communication between the client and
> the server.
> 
> I would have thought that some notification mechanism was useful, for instance
> my means of delivery of a signal as set using F_SETOWN / F_SETSIG for leases.
> 
> I would highly appreciate helpful pointers should this question have already
> been discussed of if there exists any other helpful documentation on it.
> 
> Thank you,
> 
> Nils
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