rxrpc: Implement an in-kernel rxperf server for testing purposes

jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-284.30.1.el9_2
commit-author David Howells <[email protected]>
commit 75bfdbf

Implement an in-kernel rxperf server to allow kernel-based rxrpc services
to be tested directly, unlike with AFS where they're accessed by the
fileserver when the latter decides it wants to.

This is implemented as a module that, if loaded, opens UDP port 7009
(afs3-rmtsys) and listens on it for incoming calls.  Calls can be generated
using the rxperf command shipped with OpenAFS, for example.

Changes
=======
ver #2)
 - Use min_t() instead of min().

	Signed-off-by: David Howells <[email protected]>
cc: Marc Dionne <[email protected]>
cc: [email protected]
cc: Jakub Kicinski <[email protected]>
(cherry picked from commit 75bfdbf)
	Signed-off-by: Jonathan Maple <[email protected]>

Author: PlaidCat

include/net/af_rxrpc.h

@@ -71,5 +71,6 @@ void rxrpc_kernel_set_max_life(struct socket *, struct rxrpc_call *,
 			       unsigned long);
 
 int rxrpc_sock_set_min_security_level(struct sock *sk, unsigned int val);
+int rxrpc_sock_set_security_keyring(struct sock *, struct key *);
 
 #endif /* _NET_RXRPC_H */

net/rxrpc/Kconfig

@@ -58,4 +58,11 @@ config RXKAD
 
 	  See Documentation/networking/rxrpc.rst.
 
+config RXPERF
+	tristate "RxRPC test service"
+	help
+	  Provide an rxperf service tester.  This listens on UDP port 7009 for
+	  incoming calls from the rxperf program (an example of which can be
+	  found in OpenAFS).
+
 endif

net/rxrpc/Makefile

@@ -36,3 +36,6 @@ rxrpc-y := \
 rxrpc-$(CONFIG_PROC_FS) += proc.o
 rxrpc-$(CONFIG_RXKAD) += rxkad.o
 rxrpc-$(CONFIG_SYSCTL) += sysctl.o
+
+
+obj-$(CONFIG_RXPERF) += rxperf.o