diff options
Diffstat (limited to 'fs/nfsd/nfs4callback.c')
-rw-r--r-- | fs/nfsd/nfs4callback.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 24534db87e86..c3b11a715082 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -823,7 +823,16 @@ static const struct rpc_program cb_program = { static int max_cb_time(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); - return max(nn->nfsd4_lease/10, (time_t)1) * HZ; + + /* + * nfsd4_lease is set to at most one hour in __nfsd4_write_time, + * so we can use 32-bit math on it. Warn if that assumption + * ever stops being true. + */ + if (WARN_ON_ONCE(nn->nfsd4_lease > 3600)) + return 360 * HZ; + + return max(((u32)nn->nfsd4_lease)/10, 1u) * HZ; } static struct workqueue_struct *callback_wq; |