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-rw-r--r--net/sunrpc/svc_xprt.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 2e5b92ae24e..512c10fc1a9 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -977,3 +977,38 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt)
spin_unlock(&xprt->xpt_lock);
return dr;
}
+
+/*
+ * Return the transport instance pointer for the endpoint accepting
+ * connections/peer traffic from the specified transport class,
+ * address family and port.
+ *
+ * Specifying 0 for the address family or port is effectively a
+ * wild-card, and will result in matching the first transport in the
+ * service's list that has a matching class name.
+ */
+struct svc_xprt *svc_find_xprt(struct svc_serv *serv, char *xcl_name,
+ int af, int port)
+{
+ struct svc_xprt *xprt;
+ struct svc_xprt *found = NULL;
+
+ /* Sanity check the args */
+ if (!serv || !xcl_name)
+ return found;
+
+ spin_lock_bh(&serv->sv_lock);
+ list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) {
+ if (strcmp(xprt->xpt_class->xcl_name, xcl_name))
+ continue;
+ if (af != AF_UNSPEC && af != xprt->xpt_local.ss_family)
+ continue;
+ if (port && port != svc_xprt_local_port(xprt))
+ continue;
+ found = xprt;
+ break;
+ }
+ spin_unlock_bh(&serv->sv_lock);
+ return found;
+}
+EXPORT_SYMBOL_GPL(svc_find_xprt);