2 * RPC client multipathing definitions
4 * Copyright (c) 2015, 2016, Primary Data, Inc. All rights reserved.
6 * Trond Myklebust <trond.myklebust@primarydata.com>
8 #ifndef _NET_SUNRPC_XPRTMULTIPATH_H
9 #define _NET_SUNRPC_XPRTMULTIPATH_H
11 struct rpc_xprt_iter_ops;
12 struct rpc_xprt_switch {
16 unsigned int xps_nxprts;
17 struct list_head xps_xprt_list;
21 const struct rpc_xprt_iter_ops *xps_iter_ops;
23 struct rcu_head xps_rcu;
26 struct rpc_xprt_iter {
27 struct rpc_xprt_switch __rcu *xpi_xpswitch;
28 struct rpc_xprt * xpi_cursor;
30 const struct rpc_xprt_iter_ops *xpi_ops;
34 struct rpc_xprt_iter_ops {
35 void (*xpi_rewind)(struct rpc_xprt_iter *);
36 struct rpc_xprt *(*xpi_xprt)(struct rpc_xprt_iter *);
37 struct rpc_xprt *(*xpi_next)(struct rpc_xprt_iter *);
40 extern struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
43 extern struct rpc_xprt_switch *xprt_switch_get(struct rpc_xprt_switch *xps);
44 extern void xprt_switch_put(struct rpc_xprt_switch *xps);
46 extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps);
48 extern void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
49 struct rpc_xprt *xprt);
50 extern void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
51 struct rpc_xprt *xprt);
53 extern void xprt_iter_init(struct rpc_xprt_iter *xpi,
54 struct rpc_xprt_switch *xps);
56 extern void xprt_iter_init_listall(struct rpc_xprt_iter *xpi,
57 struct rpc_xprt_switch *xps);
59 extern void xprt_iter_destroy(struct rpc_xprt_iter *xpi);
61 extern struct rpc_xprt_switch *xprt_iter_xchg_switch(
62 struct rpc_xprt_iter *xpi,
63 struct rpc_xprt_switch *newswitch);
65 extern struct rpc_xprt *xprt_iter_xprt(struct rpc_xprt_iter *xpi);
66 extern struct rpc_xprt *xprt_iter_get_xprt(struct rpc_xprt_iter *xpi);
67 extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);