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authorTrond Myklebust <Trond.Myklebust@netapp.com>2011-08-24 15:07:37 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-08-24 15:07:37 -0400
commit2f60ea6b8ceda61ae08bef71a652eac36ec193b3 (patch)
treef950b29615be254fb7f90a607caf3f307518a34b /fs/nfs/nfs4renewd.c
parent8534d4ec055d854be6c94e8e5654fa87678ea5f7 (diff)
downloadop-kernel-dev-2f60ea6b8ceda61ae08bef71a652eac36ec193b3.zip
op-kernel-dev-2f60ea6b8ceda61ae08bef71a652eac36ec193b3.tar.gz
NFSv4: The NFSv4.0 client must send RENEW calls if it holds a delegation
RFC3530 states that if the client holds a delegation, then it is obliged to continue to send RENEW calls once every lease period in order to allow the server to return NFS4ERR_CB_PATH_DOWN if the callback path is unreachable. This is not required for NFSv4.1, since the server can at any time set the SEQ4_STATUS_CB_PATH_DOWN_SESSION in any SEQUENCE operation. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4renewd.c')
-rw-r--r--fs/nfs/nfs4renewd.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index df8e7f3..dc484c0 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -60,6 +60,7 @@ nfs4_renew_state(struct work_struct *work)
struct rpc_cred *cred;
long lease;
unsigned long last, now;
+ unsigned renew_flags = 0;
ops = clp->cl_mvops->state_renewal_ops;
dprintk("%s: start\n", __func__);
@@ -72,18 +73,23 @@ nfs4_renew_state(struct work_struct *work)
last = clp->cl_last_renewal;
now = jiffies;
/* Are we close to a lease timeout? */
- if (time_after(now, last + lease/3)) {
+ if (time_after(now, last + lease/3))
+ renew_flags |= NFS4_RENEW_TIMEOUT;
+ if (nfs_delegations_present(clp))
+ renew_flags |= NFS4_RENEW_DELEGATION_CB;
+
+ if (renew_flags != 0) {
cred = ops->get_state_renewal_cred_locked(clp);
spin_unlock(&clp->cl_lock);
if (cred == NULL) {
- if (!nfs_delegations_present(clp)) {
+ if (!(renew_flags & NFS4_RENEW_DELEGATION_CB)) {
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
goto out;
}
nfs_expire_all_delegations(clp);
} else {
/* Queue an asynchronous RENEW. */
- ops->sched_state_renewal(clp, cred);
+ ops->sched_state_renewal(clp, cred, renew_flags);
put_rpccred(cred);
goto out_exp;
}
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