From: Tharindu Rukshan Bamunuarachchi <btharindu@gmail.com>
Subject: Re: starting 90-second grace period : leasetime less than 10
Date: Mon, 14 Dec 2009 17:40:20 +0530
Message-ID: <f5b5ebae0912140410t2814d7bck688549103b3104ea@mail.gmail.com>
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To: linux-nfs@vger.kernel.org
Sender: linux-nfs-owner@vger.kernel.org

I can not set nfs4leasetime value less than 10 seconds.

there is a verification in __write_leasetime(). (lease < 10 || lease > 3600)

I am going to change this to ~2 second (to make NFS HA failover happen
in less than 10 seconds with HeartBeat).

Any reason why is this checked for 10 (i.e. lease < 10) ... ?


static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
{
        /* if size > 10 seconds, call
         * nfs4_reset_lease() then write out the new lease (seconds) as reply
         */
        char *mesg = buf;
        int rv, lease;

        if (size > 0) {
                if (nfsd_serv)
                        return -EBUSY;
                rv = get_int(&mesg, &lease);
                if (rv)
                        return rv;
                if (lease < 10 || lease > 3600)
                        return -EINVAL;
                nfs4_reset_lease(lease);
        }

        return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
                                                        nfs4_lease_time());
}

-- 
Tharindu Rukshan Bamunuarachchi