Revert "nfsd4: return default lease period"

This reverts commit d6ebf5088f09472c1136cd506bdc27034a6763f8.

I forgot that the kernel's default lease period should never be
decreased!

After a kernel upgrade, the kernel has no way of knowing on its own what
the previous lease time was.  Unless userspace tells it otherwise, it
will assume the previous lease period was the same.

So if we decrease this value in a kernel upgrade, we end up enforcing a
grace period that's too short, and clients will fail to reclaim state in
time.  Symptoms may include EIO and log messages like "NFS:
nfs4_reclaim_open_state: Lock reclaim failed!"

There was no real justification for the lease period decrease anyway.

Reported-by: Donald Buczek <buczek@molgen.mpg.de>
Fixes: d6ebf5088f09 "nfsd4: return default lease period"
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index b33f9785b756edfa0ab597def3ce3827a5057513..72a7681f404699b89d502102a9c290078900647b 100644 (file)
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1239,8 +1239,8 @@ static __net_init int nfsd_init_net(struct net *net)
        retval = nfsd_idmap_init(net);
        if (retval)
                goto out_idmap_error;
-       nn->nfsd4_lease = 45;   /* default lease time */
-       nn->nfsd4_grace = 45;
+       nn->nfsd4_lease = 90;   /* default lease time */
+       nn->nfsd4_grace = 90;
        nn->somebody_reclaimed = false;
        nn->clverifier_counter = prandom_u32();
        nn->clientid_counter = prandom_u32();