nfsd4: make recall callback an asynchronous rpc
As with the probe, this removes the need for another kthread.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index b88b207..f4fab69 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -494,6 +494,49 @@
do_probe_callback(clp);
}
+static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_delegation *dp = calldata;
+ struct nfs4_client *clp = dp->dl_client;
+
+ switch (task->tk_status) {
+ case -EIO:
+ /* Network partition? */
+ atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ warn_no_callback_path(clp, task->tk_status);
+ case -EBADHANDLE:
+ case -NFS4ERR_BAD_STATEID:
+ /* Race: client probably got cb_recall
+ * before open reply granting delegation */
+ break;
+ default:
+ /* success, or error we can't handle */
+ return;
+ }
+ if (dp->dl_retries--) {
+ rpc_delay(task, 2*HZ);
+ task->tk_status = 0;
+ rpc_restart_call(task);
+ } else {
+ atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ warn_no_callback_path(clp, task->tk_status);
+ }
+}
+
+static void nfsd4_cb_recall_release(void *calldata)
+{
+ struct nfs4_delegation *dp = calldata;
+ struct nfs4_client *clp = dp->dl_client;
+
+ nfs4_put_delegation(dp);
+ put_nfs4_client(clp);
+}
+
+static const struct rpc_call_ops nfsd4_cb_recall_ops = {
+ .rpc_call_done = nfsd4_cb_recall_done,
+ .rpc_release = nfsd4_cb_recall_release,
+};
+
/*
* called with dp->dl_count inc'ed.
*/
@@ -507,32 +550,13 @@
.rpc_argp = dp,
.rpc_cred = clp->cl_cb_conn.cb_cred
};
- int status = 0;
+ int status;
dp->dl_retries = 1;
- status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
- while (dp->dl_retries--) {
- switch (status) {
- case -EIO:
- /* Network partition? */
- atomic_set(&clp->cl_cb_conn.cb_set, 0);
- case -EBADHANDLE:
- case -NFS4ERR_BAD_STATEID:
- /* Race: client probably got cb_recall
- * before open reply granting delegation */
- break;
- default:
- goto out_put_cred;
- }
- ssleep(2);
- status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
+ status = rpc_call_async(clnt, &msg, RPC_TASK_SOFT,
+ &nfsd4_cb_recall_ops, dp);
+ if (status) {
+ put_nfs4_client(clp);
+ nfs4_put_delegation(dp);
}
-out_put_cred:
- /*
- * Success or failure, now we're either waiting for lease expiration
- * or deleg_return.
- */
- put_nfs4_client(clp);
- nfs4_put_delegation(dp);
- return;
}