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authorChuck Lever <chuck.lever@ORACLE.COM>2011-05-09 15:22:44 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-05-27 17:42:47 -0400
commit176e21ee2ec89cae8d45cf1a850ea45a45428fb8 (patch)
tree4e1231617d193b3fe62ea5bd4df5e4d8fe8b9e80 /net/sunrpc/clnt.c
parent559649efb9b0d248541933197bdf7b75529da457 (diff)
SUNRPC: Support for RPC over AF_LOCAL transports
TI-RPC introduces the capability of performing RPC over AF_LOCAL sockets. It uses this mainly for registering and unregistering local RPC services securely with the local rpcbind, but we could also conceivably use it as a generic upcall mechanism. This patch provides a client-side only implementation for the moment. We might also consider a server-side implementation to provide AF_LOCAL access to NLM (for statd downcalls, and such like). Autobinding is not supported on kernel AF_LOCAL transports at this time. Kernel ULPs must specify the pathname of the remote endpoint when an AF_LOCAL transport is created. rpcbind supports registering services available via AF_LOCAL, so the kernel could handle it with some adjustment to ->rpcbind and ->set_port. But we don't need this feature for doing upcalls via well-known named sockets. This has not been tested with ULPs that move a substantial amount of data. Thus, I can't attest to how robust the write_space and congestion management logic is. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r--net/sunrpc/clnt.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 08ed49629b86..b84d7395535e 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -28,7 +28,9 @@
#include <linux/slab.h>
#include <linux/utsname.h>
#include <linux/workqueue.h>
+#include <linux/in.h>
#include <linux/in6.h>
+#include <linux/un.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
@@ -294,6 +296,8 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
* up a string representation of the passed-in address.
*/
if (args->servername == NULL) {
+ struct sockaddr_un *sun =
+ (struct sockaddr_un *)args->address;
struct sockaddr_in *sin =
(struct sockaddr_in *)args->address;
struct sockaddr_in6 *sin6 =
@@ -301,6 +305,10 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
servername[0] = '\0';
switch (args->address->sa_family) {
+ case AF_LOCAL:
+ snprintf(servername, sizeof(servername), "%s",
+ sun->sun_path);
+ break;
case AF_INET:
snprintf(servername, sizeof(servername), "%pI4",
&sin->sin_addr.s_addr);