unify {de,}mangle_poll(), get rid of kernel-side POLL...
[cris-mirror.git] / include / linux / sunrpc / xprtmultipath.h
blobaf1257c030d2767913dc93d21650ca6b6345ebbb
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * RPC client multipathing definitions
5 * Copyright (c) 2015, 2016, Primary Data, Inc. All rights reserved.
7 * Trond Myklebust <trond.myklebust@primarydata.com>
8 */
9 #ifndef _NET_SUNRPC_XPRTMULTIPATH_H
10 #define _NET_SUNRPC_XPRTMULTIPATH_H
12 struct rpc_xprt_iter_ops;
13 struct rpc_xprt_switch {
14 spinlock_t xps_lock;
15 struct kref xps_kref;
17 unsigned int xps_nxprts;
18 struct list_head xps_xprt_list;
20 struct net * xps_net;
22 const struct rpc_xprt_iter_ops *xps_iter_ops;
24 struct rcu_head xps_rcu;
27 struct rpc_xprt_iter {
28 struct rpc_xprt_switch __rcu *xpi_xpswitch;
29 struct rpc_xprt * xpi_cursor;
31 const struct rpc_xprt_iter_ops *xpi_ops;
35 struct rpc_xprt_iter_ops {
36 void (*xpi_rewind)(struct rpc_xprt_iter *);
37 struct rpc_xprt *(*xpi_xprt)(struct rpc_xprt_iter *);
38 struct rpc_xprt *(*xpi_next)(struct rpc_xprt_iter *);
41 extern struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
42 gfp_t gfp_flags);
44 extern struct rpc_xprt_switch *xprt_switch_get(struct rpc_xprt_switch *xps);
45 extern void xprt_switch_put(struct rpc_xprt_switch *xps);
47 extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps);
49 extern void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
50 struct rpc_xprt *xprt);
51 extern void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
52 struct rpc_xprt *xprt);
54 extern void xprt_iter_init(struct rpc_xprt_iter *xpi,
55 struct rpc_xprt_switch *xps);
57 extern void xprt_iter_init_listall(struct rpc_xprt_iter *xpi,
58 struct rpc_xprt_switch *xps);
60 extern void xprt_iter_destroy(struct rpc_xprt_iter *xpi);
62 extern struct rpc_xprt_switch *xprt_iter_xchg_switch(
63 struct rpc_xprt_iter *xpi,
64 struct rpc_xprt_switch *newswitch);
66 extern struct rpc_xprt *xprt_iter_xprt(struct rpc_xprt_iter *xpi);
67 extern struct rpc_xprt *xprt_iter_get_xprt(struct rpc_xprt_iter *xpi);
68 extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);
70 extern bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
71 const struct sockaddr *sap);
72 #endif