nfsd: introduce nfsd4_callback_ops
Add a higher level abstraction than the rpc_ops for callback operations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index d97e200..4fe4be1 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -824,18 +824,8 @@
dprintk("%s: freed slot, new seqid=%d\n", __func__,
clp->cl_cb_session->se_cb_seq_nr);
}
-}
-static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
-{
- struct nfsd4_callback *cb = calldata;
- struct nfs4_delegation *dp = to_delegation(cb);
- struct nfs4_client *clp = cb->cb_clp;
- struct rpc_clnt *current_rpc_client = clp->cl_cb_client;
-
- nfsd4_cb_done(task, calldata);
-
- if (current_rpc_client != task->tk_client) {
+ if (clp->cl_cb_client != task->tk_client) {
/* We're shutting down or changing cl_cb_client; leave
* it to nfsd4_process_cb_update to restart the call if
* necessary. */
@@ -844,45 +834,42 @@
if (cb->cb_done)
return;
- switch (task->tk_status) {
+
+ switch (cb->cb_ops->done(cb, task)) {
case 0:
+ task->tk_status = 0;
+ rpc_restart_call_prepare(task);
+ return;
+ case 1:
break;
- case -EBADHANDLE:
- case -NFS4ERR_BAD_STATEID:
- /* Race: client probably got cb_recall
- * before open reply granting delegation */
- if (dp->dl_retries--) {
- rpc_delay(task, 2*HZ);
- task->tk_status = 0;
- rpc_restart_call_prepare(task);
- return;
- }
- default:
+ case -1:
/* Network partition? */
nfsd4_mark_cb_down(clp, task->tk_status);
+ break;
+ default:
+ BUG();
}
cb->cb_done = true;
}
-static void nfsd4_cb_recall_release(void *calldata)
+static void nfsd4_cb_release(void *calldata)
{
struct nfsd4_callback *cb = calldata;
struct nfs4_client *clp = cb->cb_clp;
if (cb->cb_done) {
- struct nfs4_delegation *dp = to_delegation(cb);
-
spin_lock(&clp->cl_lock);
list_del(&cb->cb_per_client);
spin_unlock(&clp->cl_lock);
- nfs4_put_stid(&dp->dl_stid);
+
+ cb->cb_ops->release(cb);
}
}
-static const struct rpc_call_ops nfsd4_cb_recall_ops = {
+static const struct rpc_call_ops nfsd4_cb_ops = {
.rpc_call_prepare = nfsd4_cb_prepare,
- .rpc_call_done = nfsd4_cb_recall_done,
- .rpc_release = nfsd4_cb_recall_release,
+ .rpc_call_done = nfsd4_cb_done,
+ .rpc_release = nfsd4_cb_release,
};
int nfsd4_create_callback_queue(void)
@@ -911,12 +898,6 @@
flush_workqueue(callback_wq);
}
-static void nfsd4_release_cb(struct nfsd4_callback *cb)
-{
- if (cb->cb_ops->rpc_release)
- cb->cb_ops->rpc_release(cb);
-}
-
/* requires cl_lock: */
static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)
{
@@ -983,54 +964,40 @@
}
static void
-nfsd4_run_callback_rpc(struct nfsd4_callback *cb)
+nfsd4_run_cb_work(struct work_struct *work)
{
+ struct nfsd4_callback *cb =
+ container_of(work, struct nfsd4_callback, cb_work);
struct nfs4_client *clp = cb->cb_clp;
struct rpc_clnt *clnt;
+ if (cb->cb_ops && cb->cb_ops->prepare)
+ cb->cb_ops->prepare(cb);
+
if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
clnt = clp->cl_cb_client;
if (!clnt) {
/* Callback channel broken, or client killed; give up: */
- nfsd4_release_cb(cb);
+ if (cb->cb_ops && cb->cb_ops->release)
+ cb->cb_ops->release(cb);
return;
}
cb->cb_msg.rpc_cred = clp->cl_cb_cred;
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
- cb->cb_ops, cb);
-}
-
-void
-nfsd4_run_cb_null(struct work_struct *w)
-{
- struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback,
- cb_work);
- nfsd4_run_callback_rpc(cb);
-}
-
-void
-nfsd4_run_cb_recall(struct work_struct *w)
-{
- struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback,
- cb_work);
-
- nfsd4_prepare_cb_recall(to_delegation(cb));
- nfsd4_run_callback_rpc(cb);
+ cb->cb_ops ? &nfsd4_cb_ops : &nfsd4_cb_probe_ops, cb);
}
void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
- enum nfsd4_cb_op op)
+ struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op)
{
cb->cb_clp = clp;
cb->cb_msg.rpc_proc = &nfs4_cb_procedures[op];
cb->cb_msg.rpc_argp = cb;
cb->cb_msg.rpc_resp = cb;
- if (op == NFSPROC4_CLNT_CB_NULL)
- cb->cb_ops = &nfsd4_cb_probe_ops;
- else
- cb->cb_ops = &nfsd4_cb_recall_ops;
+ cb->cb_ops = ops;
+ INIT_WORK(&cb->cb_work, nfsd4_run_cb_work);
INIT_LIST_HEAD(&cb->cb_per_client);
cb->cb_done = true;
}
