From 441e3e242903f9b190d5764bed73edb58f977413 Mon Sep 17 00:00:00 2001 From: Tom Talpey Date: Wed, 11 Mar 2009 14:37:56 -0400 Subject: SUNRPC: dynamically load RPC transport modules on-demand Provide an api to attempt to load any necessary kernel RPC client transport module automatically. By convention, the desired module name is "xprt"+"transport name". For example, when NFS mounting with "-o proto=rdma", attempt to load the "xprtrdma" module. Signed-off-by: Tom Talpey Cc: Chuck Lever Signed-off-by: Trond Myklebust --- net/sunrpc/xprt.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'net/sunrpc') diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 62098d101a1..d1afec64039 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -151,6 +151,37 @@ out: } EXPORT_SYMBOL_GPL(xprt_unregister_transport); +/** + * xprt_load_transport - load a transport implementation + * @transport_name: transport to load + * + * Returns: + * 0: transport successfully loaded + * -ENOENT: transport module not available + */ +int xprt_load_transport(const char *transport_name) +{ + struct xprt_class *t; + char module_name[sizeof t->name + 5]; + int result; + + result = 0; + spin_lock(&xprt_list_lock); + list_for_each_entry(t, &xprt_list, list) { + if (strcmp(t->name, transport_name) == 0) { + spin_unlock(&xprt_list_lock); + goto out; + } + } + spin_unlock(&xprt_list_lock); + strcpy(module_name, "xprt"); + strncat(module_name, transport_name, sizeof t->name); + result = request_module(module_name); +out: + return result; +} +EXPORT_SYMBOL_GPL(xprt_load_transport); + /** * xprt_reserve_xprt - serialize write access to transports * @task: task that is requesting access to the transport -- cgit v1.2.3