netns: add net parameter to IP6_INC_STATS

[linux-2.6-omap-h63xx.git] / include / net / 9p / transport.h

diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h
index 462d42279fb01c7b0a66da0a4ee9024ad3fe96a0..3ca737120a90cff4f845d8ccc66fc9173e0fcd6f 100644 (file)
--- a/include/net/9p/transport.h
+++ b/include/net/9p/transport.h
@@ -4,7 +4,7 @@
  * Transport Definition
  *
  *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ *  Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2
@@ -26,24 +26,79 @@
 #ifndef NET_9P_TRANSPORT_H
 #define NET_9P_TRANSPORT_H
 
-enum p9_transport_status {
+#include <linux/module.h>
+
+/**
+ * enum p9_trans_status - different states of underlying transports
+ * @Connected: transport is connected and healthy
+ * @Disconnected: transport has been disconnected
+ * @Hung: transport is connected by wedged
+ *
+ * This enumeration details the various states a transport
+ * instatiation can be in.
+ */
+
+enum p9_trans_status {
        Connected,
        Disconnected,
        Hung,
 };
 
-struct p9_transport {
-       enum p9_transport_status status;
-       void *priv;
+/**
+ * struct p9_trans - per-transport state and API
+ * @status: transport &p9_trans_status
+ * @msize: negotiated maximum packet size (duplicate from client)
+ * @extended: negotiated protocol extensions (duplicate from client)
+ * @priv: transport private data
+ * @close: member function to disconnect and close the transport
+ * @rpc: member function to issue a request to the transport
+ *
+ * This is the basic API for a transport instance.  It is used as
+ * a handle by the client to issue requests.  This interface is currently
+ * in flux during reorganization.
+ *
+ * Bugs: there is lots of duplicated data here and its not clear that
+ * the member functions need to be per-instance versus per transport
+ * module.
+ */
 
-       int (*write) (struct p9_transport *, void *, int);
-       int (*read) (struct p9_transport *, void *, int);
-       void (*close) (struct p9_transport *);
-       unsigned int (*poll)(struct p9_transport *, struct poll_table_struct *);
+struct p9_trans {
+       enum p9_trans_status status;
+       int msize;
+       unsigned char extended;
+       void *priv;
+       void (*close) (struct p9_trans *);
+       int (*rpc) (struct p9_trans *t, struct p9_fcall *tc,
+                                                       struct p9_fcall **rc);
 };
 
-struct p9_transport *p9_trans_create_tcp(const char *addr, int port);
-struct p9_transport *p9_trans_create_unix(const char *addr);
-struct p9_transport *p9_trans_create_fd(int rfd, int wfd);
+/**
+ * struct p9_trans_module - transport module interface
+ * @list: used to maintain a list of currently available transports
+ * @name: the human-readable name of the transport
+ * @maxsize: transport provided maximum packet size
+ * @def: set if this transport should be considered the default
+ * @create: member function to create a new connection on this transport
+ *
+ * This is the basic API for a transport module which is registered by the
+ * transport module with the 9P core network module and used by the client
+ * to instantiate a new connection on a transport.
+ *
+ * Bugs: the transport module list isn't protected.
+ */
+
+struct p9_trans_module {
+       struct list_head list;
+       char *name;             /* name of transport */
+       int maxsize;            /* max message size of transport */
+       int def;                /* this transport should be default */
+       struct p9_trans * (*create)(const char *, char *, int, unsigned char);
+       struct module *owner;
+};
 
+void v9fs_register_trans(struct p9_trans_module *m);
+void v9fs_unregister_trans(struct p9_trans_module *m);
+struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name);
+struct p9_trans_module *v9fs_get_default_trans(void);
+void v9fs_put_trans(struct p9_trans_module *m);
 #endif /* NET_9P_TRANSPORT_H */