From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Tue, 10 Nov 2020 14:41:21 +0000 (-0500)
Subject: SUNRPC: Add a helper to return the transport identifier given a netid
X-Git-Tag: baikal/mips/sdk5.9~11941^2~48
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=0f418085d2b50a66e83e9e3895f1f881baab24ac;p=kernel.git

SUNRPC: Add a helper to return the transport identifier given a netid

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 3ac5037d1c3da..f7b75c72f80e5 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -386,6 +386,7 @@ xprt_disable_swap(struct rpc_xprt *xprt)
 int			xprt_register_transport(struct xprt_class *type);
 int			xprt_unregister_transport(struct xprt_class *type);
 int			xprt_load_transport(const char *);
+int			xprt_find_transport_ident(const char *);
 void			xprt_wait_for_reply_request_def(struct rpc_task *task);
 void			xprt_wait_for_reply_request_rtt(struct rpc_task *task);
 void			xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index bf490d0c98c6a..23452f57d3692 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -219,22 +219,39 @@ xprt_class_find_by_netid(const char *netid)
 }
 
 /**
- * xprt_load_transport - load a transport implementation
+ * xprt_find_transport_ident - convert a netid into a transport identifier
  * @netid: transport to load
  *
  * Returns:
- * 0:		transport successfully loaded
+ * > 0:		transport identifier
  * -ENOENT:	transport module not available
  */
-int xprt_load_transport(const char *netid)
+int xprt_find_transport_ident(const char *netid)
 {
 	const struct xprt_class *t;
+	int ret;
 
 	t = xprt_class_find_by_netid(netid);
 	if (!t)
 		return -ENOENT;
+	ret = t->ident;
 	xprt_class_release(t);
-	return 0;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(xprt_find_transport_ident);
+
+/**
+ * xprt_load_transport - load a transport implementation
+ * @netid: transport to load
+ *
+ * Returns:
+ * 0:		transport successfully loaded
+ * -ENOENT:	transport module not available
+ */
+int xprt_load_transport(const char *netid)
+{
+	int ret = xprt_find_transport_ident(netid);
+	return ret < 0 ? ret : 0;
 }
 EXPORT_SYMBOL_GPL(xprt_load_transport);