static void xprt_connect_status(struct rpc_task *task);
static int __xprt_get_cong(struct rpc_xprt *, struct rpc_task *);
+static spinlock_t xprt_list_lock = SPIN_LOCK_UNLOCKED;
+static LIST_HEAD(xprt_list);
+
/*
* The transport code maintains an estimate on the maximum number of out-
* standing RPC requests, using a smoothed version of the congestion
#define RPCXPRT_CONGESTED(xprt) ((xprt)->cong >= (xprt)->cwnd)
+/**
+ * xprt_register_transport - register a transport implementation
+ * @transport: transport to register
+ *
+ * If a transport implementation is loaded as a kernel module, it can
+ * call this interface to make itself known to the RPC client.
+ *
+ * Returns:
+ * 0: transport successfully registered
+ * -EEXIST: transport already registered
+ * -EINVAL: transport module being unloaded
+ */
+int xprt_register_transport(struct xprt_class *transport)
+{
+ struct xprt_class *t;
+ int result;
+
+ result = -EEXIST;
+ spin_lock(&xprt_list_lock);
+ list_for_each_entry(t, &xprt_list, list) {
+ /* don't register the same transport class twice */
+ if (t->ident == transport->ident)
+ goto out;
+ }
+
+ result = -EINVAL;
+ if (try_module_get(THIS_MODULE)) {
+ list_add_tail(&transport->list, &xprt_list);
+ printk(KERN_INFO "RPC: Registered %s transport module.\n",
+ transport->name);
+ result = 0;
+ }
+
+out:
+ spin_unlock(&xprt_list_lock);
+ return result;
+}
+EXPORT_SYMBOL_GPL(xprt_register_transport);
+
+/**
+ * xprt_unregister_transport - unregister a transport implementation
+ * transport: transport to unregister
+ *
+ * Returns:
+ * 0: transport successfully unregistered
+ * -ENOENT: transport never registered
+ */
+int xprt_unregister_transport(struct xprt_class *transport)
+{
+ struct xprt_class *t;
+ int result;
+
+ result = 0;
+ spin_lock(&xprt_list_lock);
+ list_for_each_entry(t, &xprt_list, list) {
+ if (t == transport) {
+ printk(KERN_INFO
+ "RPC: Unregistered %s transport module.\n",
+ transport->name);
+ list_del_init(&transport->list);
+ module_put(THIS_MODULE);
+ goto out;
+ }
+ }
+ result = -ENOENT;
+
+out:
+ spin_unlock(&xprt_list_lock);
+ return result;
+}
+EXPORT_SYMBOL_GPL(xprt_unregister_transport);
+
/**
* xprt_reserve_xprt - serialize write access to transports
* @task: task that is requesting access to the transport
rpc_sleep_on(&xprt->sending, task, NULL, NULL);
return 0;
}
+EXPORT_SYMBOL_GPL(xprt_reserve_xprt);
static void xprt_clear_locked(struct rpc_xprt *xprt)
{
clear_bit(XPRT_LOCKED, &xprt->state);
smp_mb__after_clear_bit();
} else
- schedule_work(&xprt->task_cleanup);
+ queue_work(rpciod_workqueue, &xprt->task_cleanup);
}
/*
rpc_sleep_on(&xprt->sending, task, NULL, NULL);
return 0;
}
+EXPORT_SYMBOL_GPL(xprt_reserve_xprt_cong);
static inline int xprt_lock_write(struct rpc_xprt *xprt, struct rpc_task *task)
{
__xprt_lock_write_next(xprt);
}
}
+EXPORT_SYMBOL_GPL(xprt_release_xprt);
/**
* xprt_release_xprt_cong - allow other requests to use a transport
__xprt_lock_write_next_cong(xprt);
}
}
+EXPORT_SYMBOL_GPL(xprt_release_xprt_cong);
static inline void xprt_release_write(struct rpc_xprt *xprt, struct rpc_task *task)
{
{
__xprt_put_cong(task->tk_xprt, task->tk_rqstp);
}
+EXPORT_SYMBOL_GPL(xprt_release_rqst_cong);
/**
* xprt_adjust_cwnd - adjust transport congestion window
xprt->cwnd = cwnd;
__xprt_put_cong(xprt, req);
}
+EXPORT_SYMBOL_GPL(xprt_adjust_cwnd);
/**
* xprt_wake_pending_tasks - wake all tasks on a transport's pending queue
else
rpc_wake_up(&xprt->pending);
}
+EXPORT_SYMBOL_GPL(xprt_wake_pending_tasks);
/**
* xprt_wait_for_buffer_space - wait for transport output buffer to clear
task->tk_timeout = req->rq_timeout;
rpc_sleep_on(&xprt->pending, task, NULL, NULL);
}
+EXPORT_SYMBOL_GPL(xprt_wait_for_buffer_space);
/**
* xprt_write_space - wake the task waiting for transport output buffer space
}
spin_unlock_bh(&xprt->transport_lock);
}
+EXPORT_SYMBOL_GPL(xprt_write_space);
/**
* xprt_set_retrans_timeout_def - set a request's retransmit timeout
{
task->tk_timeout = task->tk_rqstp->rq_timeout;
}
+EXPORT_SYMBOL_GPL(xprt_set_retrans_timeout_def);
/*
* xprt_set_retrans_timeout_rtt - set a request's retransmit timeout
if (task->tk_timeout > max_timeout || task->tk_timeout == 0)
task->tk_timeout = max_timeout;
}
+EXPORT_SYMBOL_GPL(xprt_set_retrans_timeout_rtt);
static void xprt_reset_majortimeo(struct rpc_rqst *req)
{
xprt_wake_pending_tasks(xprt, -ENOTCONN);
spin_unlock_bh(&xprt->transport_lock);
}
+EXPORT_SYMBOL_GPL(xprt_disconnect);
static void
xprt_init_autodisconnect(unsigned long data)
if (xprt_connecting(xprt))
xprt_release_write(xprt, NULL);
else
- schedule_work(&xprt->task_cleanup);
+ queue_work(rpciod_workqueue, &xprt->task_cleanup);
return;
out_abort:
spin_unlock(&xprt->transport_lock);
xprt->stat.bad_xids++;
return NULL;
}
+EXPORT_SYMBOL_GPL(xprt_lookup_rqst);
/**
* xprt_update_rtt - update an RPC client's RTT state after receiving a reply
rpc_set_timeo(rtt, timer, req->rq_ntrans - 1);
}
}
+EXPORT_SYMBOL_GPL(xprt_update_rtt);
/**
* xprt_complete_rqst - called when reply processing is complete
req->rq_received = req->rq_private_buf.len = copied;
rpc_wake_up_task(task);
}
+EXPORT_SYMBOL_GPL(xprt_complete_rqst);
static void xprt_timer(struct rpc_task *task)
{
xprt_reset_majortimeo(req);
/* Turn off autodisconnect */
del_singleshot_timer_sync(&xprt->timer);
- } else {
- /* If all request bytes have been sent,
- * then we must be retransmitting this one */
- if (!req->rq_bytes_sent) {
- if (task->tk_client->cl_discrtry) {
- xprt_disconnect(xprt);
- task->tk_status = -ENOTCONN;
- return;
- }
- }
}
} else if (!req->rq_bytes_sent)
return;
req->rq_task = task;
req->rq_xprt = xprt;
req->rq_buffer = NULL;
- req->rq_bufsize = 0;
req->rq_xid = xprt_alloc_xid(xprt);
req->rq_release_snd_buf = NULL;
xprt_reset_majortimeo(req);
mod_timer(&xprt->timer,
xprt->last_used + xprt->idle_timeout);
spin_unlock_bh(&xprt->transport_lock);
- xprt->ops->buf_free(task);
+ xprt->ops->buf_free(req->rq_buffer);
task->tk_rqstp = NULL;
if (req->rq_release_snd_buf)
req->rq_release_snd_buf(req);
/**
* xprt_create_transport - create an RPC transport
- * @proto: requested transport protocol
- * @ap: remote peer address
- * @size: length of address
- * @to: timeout parameters
+ * @args: rpc transport creation arguments
*
*/
-struct rpc_xprt *xprt_create_transport(int proto, struct sockaddr *ap, size_t size, struct rpc_timeout *to)
+struct rpc_xprt *xprt_create_transport(struct xprt_create *args)
{
struct rpc_xprt *xprt;
struct rpc_rqst *req;
+ struct xprt_class *t;
- switch (proto) {
- case IPPROTO_UDP:
- xprt = xs_setup_udp(ap, size, to);
- break;
- case IPPROTO_TCP:
- xprt = xs_setup_tcp(ap, size, to);
- break;
- default:
- printk(KERN_ERR "RPC: unrecognized transport protocol: %d\n",
- proto);
- return ERR_PTR(-EIO);
+ spin_lock(&xprt_list_lock);
+ list_for_each_entry(t, &xprt_list, list) {
+ if (t->ident == args->ident) {
+ spin_unlock(&xprt_list_lock);
+ goto found;
+ }
}
+ spin_unlock(&xprt_list_lock);
+ printk(KERN_ERR "RPC: transport (%d) not supported\n", args->ident);
+ return ERR_PTR(-EIO);
+
+found:
+ xprt = t->setup(args);
if (IS_ERR(xprt)) {
dprintk("RPC: xprt_create_transport: failed, %ld\n",
-PTR_ERR(xprt));
xprt->timer.data = (unsigned long) xprt;
xprt->last_used = jiffies;
xprt->cwnd = RPC_INITCWND;
+ xprt->bind_index = 0;
rpc_init_wait_queue(&xprt->binding, "xprt_binding");
rpc_init_wait_queue(&xprt->pending, "xprt_pending");