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| author | Tom Talpey <tmtalpey@gmail.com> | 2009-03-11 14:37:56 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2009-03-11 14:37:56 -0400 |
| commit | 441e3e242903f9b190d5764bed73edb58f977413 (patch) | |
| tree | 3898c80feadee3cdeb3c99cb7d62861127f1b4ef | |
| parent | b38ab40ad58c1fc43ea590d6342f6a6763ac8fb6 (diff) | |
| download | linux-441e3e242903f9b190d5764bed73edb58f977413.tar.bz2 | |
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>
| -rw-r--r-- | include/linux/sunrpc/xprt.h | 1 | ||||
| -rw-r--r-- | net/sunrpc/xprt.c | 31 |
2 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 11fc71d50c1e..2b0d960603b9 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -235,6 +235,7 @@ static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 * */ int xprt_register_transport(struct xprt_class *type); int xprt_unregister_transport(struct xprt_class *type); +int xprt_load_transport(const char *); void xprt_set_retrans_timeout_def(struct rpc_task *task); void xprt_set_retrans_timeout_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 62098d101a1f..d1afec640394 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -152,6 +152,37 @@ 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 * |