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authorTom Talpey <tmtalpey@gmail.com>2009-03-11 14:37:56 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-03-11 14:37:56 -0400
commit441e3e242903f9b190d5764bed73edb58f977413 (patch)
tree3898c80feadee3cdeb3c99cb7d62861127f1b4ef /net/sunrpc/xprt.c
parentb38ab40ad58c1fc43ea590d6342f6a6763ac8fb6 (diff)
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 <tmtalpey@gmail.com> Cc: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xprt.c')
-rw-r--r--net/sunrpc/xprt.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 62098d101a1f..d1afec640394 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -152,6 +152,37 @@ out:
152EXPORT_SYMBOL_GPL(xprt_unregister_transport); 152EXPORT_SYMBOL_GPL(xprt_unregister_transport);
153 153
154/** 154/**
155 * xprt_load_transport - load a transport implementation
156 * @transport_name: transport to load
157 *
158 * Returns:
159 * 0: transport successfully loaded
160 * -ENOENT: transport module not available
161 */
162int xprt_load_transport(const char *transport_name)
163{
164 struct xprt_class *t;
165 char module_name[sizeof t->name + 5];
166 int result;
167
168 result = 0;
169 spin_lock(&xprt_list_lock);
170 list_for_each_entry(t, &xprt_list, list) {
171 if (strcmp(t->name, transport_name) == 0) {
172 spin_unlock(&xprt_list_lock);
173 goto out;
174 }
175 }
176 spin_unlock(&xprt_list_lock);
177 strcpy(module_name, "xprt");
178 strncat(module_name, transport_name, sizeof t->name);
179 result = request_module(module_name);
180out:
181 return result;
182}
183EXPORT_SYMBOL_GPL(xprt_load_transport);
184
185/**
155 * xprt_reserve_xprt - serialize write access to transports 186 * xprt_reserve_xprt - serialize write access to transports
156 * @task: task that is requesting access to the transport 187 * @task: task that is requesting access to the transport
157 * 188 *