[PATCH RFC 1/9] sunrpc: transplant shutdown_client() to sunrpc module

[Jeff Layton <jlayton@xxxxxxxxxx>]

This is really a sunrpc-level function, and in later patches we'll need
to call this routine from lockd as well. Move it to the sunrpc module,
rename and export it.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/nfs/sysfs.c               | 19 ++++---------------
 include/linux/sunrpc/sched.h |  1 +
 net/sunrpc/clnt.c            | 12 ++++++++++++
 3 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/fs/nfs/sysfs.c b/fs/nfs/sysfs.c
index 7b59a40d40c061a41b0fbde91aa006314f02c1fb..c29c5fd639554461bdcd9ff612726194910d85b5 100644
--- a/fs/nfs/sysfs.c
+++ b/fs/nfs/sysfs.c
@@ -217,17 +217,6 @@ void nfs_netns_sysfs_destroy(struct nfs_net *netns)
 	}
 }
 
-static bool shutdown_match_client(const struct rpc_task *task, const void *data)
-{
-	return true;
-}
-
-static void shutdown_client(struct rpc_clnt *clnt)
-{
-	clnt->cl_shutdown = 1;
-	rpc_cancel_tasks(clnt, -EIO, shutdown_match_client, NULL);
-}
-
 static ssize_t
 shutdown_show(struct kobject *kobj, struct kobj_attribute *attr,
 				char *buf)
@@ -258,14 +247,14 @@ shutdown_store(struct kobject *kobj, struct kobj_attribute *attr,
 		goto out;
 
 	server->flags |= NFS_MOUNT_SHUTDOWN;
-	shutdown_client(server->client);
-	shutdown_client(server->nfs_client->cl_rpcclient);
+	rpc_clnt_shutdown(server->client);
+	rpc_clnt_shutdown(server->nfs_client->cl_rpcclient);
 
 	if (!IS_ERR(server->client_acl))
-		shutdown_client(server->client_acl);
+		rpc_clnt_shutdown(server->client_acl);
 
 	if (server->nlm_host)
-		shutdown_client(server->nlm_host->h_rpcclnt);
+		rpc_clnt_shutdown(server->nlm_host->h_rpcclnt);
 out:
 	return count;
 }
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index eac57914dcf3200c1a6ed39ab030e3fe8b4da3e1..fe7c39a17ce44ec68c0cf057133d0f8e7f0ae797 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -232,6 +232,7 @@ unsigned long	rpc_cancel_tasks(struct rpc_clnt *clnt, int error,
 				 bool (*fnmatch)(const struct rpc_task *,
 						 const void *),
 				 const void *data);
+void		rpc_clnt_shutdown(struct rpc_clnt *clnt);
 void		rpc_execute(struct rpc_task *);
 void		rpc_init_priority_wait_queue(struct rpc_wait_queue *, const char *);
 void		rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 2fe88ea79a70c134e58abfb03fca230883eddf1f..0028858b12d97e7b45f4c24cfbd761ba2a734b32 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -934,6 +934,18 @@ unsigned long rpc_cancel_tasks(struct rpc_clnt *clnt, int error,
 }
 EXPORT_SYMBOL_GPL(rpc_cancel_tasks);
 
+static bool shutdown_match_client(const struct rpc_task *task, const void *data)
+{
+	return true;
+}
+
+void rpc_clnt_shutdown(struct rpc_clnt *clnt)
+{
+	clnt->cl_shutdown = 1;
+	rpc_cancel_tasks(clnt, -EIO, shutdown_match_client, NULL);
+}
+EXPORT_SYMBOL_GPL(rpc_clnt_shutdown);
+
 static int rpc_clnt_disconnect_xprt(struct rpc_clnt *clnt,
 				    struct rpc_xprt *xprt, void *dummy)
 {

-- 
2.48.1