[PATCH v2 1/5] sunrpc: Create a sunrpc directory under /sys/kernel/

[schumaker.anna@xxxxxxxxx]

From: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>

This is where we'll put per-rpc_client related files

Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
---
v2: Move directory from /sys/net/sunrpc/ to /sys/kernel/sunrpc/
---
 net/sunrpc/Makefile      |  2 +-
 net/sunrpc/sunrpc_syms.c |  8 ++++++++
 net/sunrpc/sysfs.c       | 20 ++++++++++++++++++++
 net/sunrpc/sysfs.h       | 13 +++++++++++++
 4 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 net/sunrpc/sysfs.c
 create mode 100644 net/sunrpc/sysfs.h

diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile
index 9488600451e8..1c8de397d6ad 100644
--- a/net/sunrpc/Makefile
+++ b/net/sunrpc/Makefile
@@ -12,7 +12,7 @@ sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \
 	    auth.o auth_null.o auth_unix.o \
 	    svc.o svcsock.o svcauth.o svcauth_unix.o \
 	    addr.o rpcb_clnt.o timer.o xdr.o \
-	    sunrpc_syms.o cache.o rpc_pipe.o \
+	    sunrpc_syms.o cache.o rpc_pipe.o sysfs.o \
 	    svc_xprt.o \
 	    xprtmultipath.o
 sunrpc-$(CONFIG_SUNRPC_DEBUG) += debugfs.o
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 236fadc4a439..3b57efc692ec 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -24,6 +24,7 @@
 #include <linux/sunrpc/xprtsock.h>
 
 #include "sunrpc.h"
+#include "sysfs.h"
 #include "netns.h"
 
 unsigned int sunrpc_net_id;
@@ -103,6 +104,10 @@ init_sunrpc(void)
 	if (err)
 		goto out4;
 
+	err = rpc_sysfs_init();
+	if (err)
+		goto out5;
+
 	sunrpc_debugfs_init();
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
 	rpc_register_sysctl();
@@ -111,6 +116,8 @@ init_sunrpc(void)
 	init_socket_xprt();	/* clnt sock transport */
 	return 0;
 
+out5:
+	unregister_rpc_pipefs();
 out4:
 	unregister_pernet_subsys(&sunrpc_net_ops);
 out3:
@@ -124,6 +131,7 @@ init_sunrpc(void)
 static void __exit
 cleanup_sunrpc(void)
 {
+	rpc_sysfs_exit();
 	rpc_cleanup_clids();
 	rpcauth_remove_module();
 	cleanup_socket_xprt();
diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c
new file mode 100644
index 000000000000..fbb8db50eb29
--- /dev/null
+++ b/net/sunrpc/sysfs.c
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
+ */
+#include <linux/kobject.h>
+
+static struct kset *rpc_client_kset;
+
+int rpc_sysfs_init(void)
+{
+	rpc_client_kset = kset_create_and_add("sunrpc", NULL, kernel_kobj);
+	if (!rpc_client_kset)
+		return -ENOMEM;
+	return 0;
+}
+
+void rpc_sysfs_exit(void)
+{
+	kset_unregister(rpc_client_kset);
+}
diff --git a/net/sunrpc/sysfs.h b/net/sunrpc/sysfs.h
new file mode 100644
index 000000000000..93c3cd220506
--- /dev/null
+++ b/net/sunrpc/sysfs.h
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
+ */
+#ifndef __SUNRPC_SYSFS_H
+#define __SUNRPC_SYSFS_H
+
+extern struct kobject *rpc_client_kobj;
+
+extern int rpc_sysfs_init(void);
+extern void rpc_sysfs_exit(void);
+
+#endif
-- 
2.29.2