iucv: introduce loadable iucv interface

This patch adds a symbol to dynamically load iucv functions.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 35 insertions, 1 deletions

diff --git a/include/net/iucv/iucv.h b/include/net/iucv/iucv.h
index 1121baa9f695..0894ced31957 100644
--- a/include/net/iucv/iucv.h
+++ b/include/net/iucv/iucv.h
@@ -120,7 +120,7 @@ struct iucv_message {
 	u32 reply_size;
 	u8  rmmsg[8];
 	u8  flags;
-};
+} __packed;
 
 /*
  * struct iucv_handler
@@ -459,3 +459,37 @@ int __iucv_message_send(struct iucv_path *path, struct iucv_message *msg,
 int iucv_message_send2way(struct iucv_path *path, struct iucv_message *msg,
 			  u8 flags, u32 srccls, void *buffer, size_t size,
 			  void *answer, size_t asize, size_t *residual);
+
+struct iucv_interface {
+	int (*message_receive)(struct iucv_path *path, struct iucv_message *msg,
+		u8 flags, void *buffer, size_t size, size_t *residual);
+	int (*__message_receive)(struct iucv_path *path,
+		struct iucv_message *msg, u8 flags, void *buffer, size_t size,
+		size_t *residual);
+	int (*message_reply)(struct iucv_path *path, struct iucv_message *msg,
+		u8 flags, void *reply, size_t size);
+	int (*message_reject)(struct iucv_path *path, struct iucv_message *msg);
+	int (*message_send)(struct iucv_path *path, struct iucv_message *msg,
+		u8 flags, u32 srccls, void *buffer, size_t size);
+	int (*__message_send)(struct iucv_path *path, struct iucv_message *msg,
+		u8 flags, u32 srccls, void *buffer, size_t size);
+	int (*message_send2way)(struct iucv_path *path,
+		struct iucv_message *msg, u8 flags, u32 srccls, void *buffer,
+		size_t size, void *answer, size_t asize, size_t *residual);
+	int (*message_purge)(struct iucv_path *path, struct iucv_message *msg,
+		u32 srccls);
+	int (*path_accept)(struct iucv_path *path, struct iucv_handler *handler,
+		u8 userdata[16], void *private);
+	int (*path_connect)(struct iucv_path *path,
+		struct iucv_handler *handler,
+		u8 userid[8], u8 system[8], u8 userdata[16], void *private);
+	int (*path_quiesce)(struct iucv_path *path, u8 userdata[16]);
+	int (*path_resume)(struct iucv_path *path, u8 userdata[16]);
+	int (*path_sever)(struct iucv_path *path, u8 userdata[16]);
+	int (*iucv_register)(struct iucv_handler *handler, int smp);
+	void (*iucv_unregister)(struct iucv_handler *handler, int smp);
+	struct bus_type *bus;
+	struct device *root;
+};
+
+extern struct iucv_interface iucv_if;