Commit | Line | Data |
---|---|---|
80b14d5e TM |
1 | /* |
2 | * RPC client multipathing definitions | |
3 | * | |
4 | * Copyright (c) 2015, 2016, Primary Data, Inc. All rights reserved. | |
5 | * | |
6 | * Trond Myklebust <trond.myklebust@primarydata.com> | |
7 | */ | |
8 | #ifndef _NET_SUNRPC_XPRTMULTIPATH_H | |
9 | #define _NET_SUNRPC_XPRTMULTIPATH_H | |
10 | ||
11 | struct rpc_xprt_iter_ops; | |
12 | struct rpc_xprt_switch { | |
13 | spinlock_t xps_lock; | |
14 | struct kref xps_kref; | |
15 | ||
16 | unsigned int xps_nxprts; | |
17 | struct list_head xps_xprt_list; | |
18 | ||
19 | struct net * xps_net; | |
20 | ||
21 | const struct rpc_xprt_iter_ops *xps_iter_ops; | |
22 | ||
23 | struct rcu_head xps_rcu; | |
24 | }; | |
25 | ||
26 | struct rpc_xprt_iter { | |
27 | struct rpc_xprt_switch __rcu *xpi_xpswitch; | |
28 | struct rpc_xprt * xpi_cursor; | |
29 | ||
30 | const struct rpc_xprt_iter_ops *xpi_ops; | |
31 | }; | |
32 | ||
33 | ||
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 *); | |
38 | }; | |
39 | ||
40 | extern struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt, | |
41 | gfp_t gfp_flags); | |
42 | ||
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); | |
45 | ||
46 | extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps); | |
47 | ||
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); | |
52 | ||
53 | extern void xprt_iter_init(struct rpc_xprt_iter *xpi, | |
54 | struct rpc_xprt_switch *xps); | |
55 | ||
56 | extern void xprt_iter_init_listall(struct rpc_xprt_iter *xpi, | |
57 | struct rpc_xprt_switch *xps); | |
58 | ||
59 | extern void xprt_iter_destroy(struct rpc_xprt_iter *xpi); | |
60 | ||
61 | extern struct rpc_xprt_switch *xprt_iter_xchg_switch( | |
62 | struct rpc_xprt_iter *xpi, | |
63 | struct rpc_xprt_switch *newswitch); | |
64 | ||
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); | |
68 | ||
69 | #endif |