projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 80b14d5e TM |
2 | /* |
| 3 | * RPC client multipathing definitions | |
| 4 | * | |
| 5 | * Copyright (c) 2015, 2016, Primary Data, Inc. All rights reserved. | |
| 6 | * | |
| 7 | * Trond Myklebust <trond.myklebust@primarydata.com> | |
| 8 | */ | |
| 9 | #ifndef _NET_SUNRPC_XPRTMULTIPATH_H | |
| 10 | #define _NET_SUNRPC_XPRTMULTIPATH_H | |
| 11 | ||
| 12 | struct rpc_xprt_iter_ops; | |
| 13 | struct rpc_xprt_switch { | |
| 14 | spinlock_t xps_lock; | |
| 15 | struct kref xps_kref; | |
| 16 | ||
| 17 | unsigned int xps_nxprts; | |
| 21f0ffaf TM |
18 | unsigned int xps_nactive; |
| 19 | atomic_long_t xps_queuelen; | |
| 80b14d5e TM |
20 | struct list_head xps_xprt_list; |
| 21 | ||
| 22 | struct net * xps_net; | |
| 23 | ||
| 24 | const struct rpc_xprt_iter_ops *xps_iter_ops; | |
| 25 | ||
| 26 | struct rcu_head xps_rcu; | |
| 27 | }; | |
| 28 | ||
| 29 | struct rpc_xprt_iter { | |
| 30 | struct rpc_xprt_switch __rcu *xpi_xpswitch; | |
| 31 | struct rpc_xprt * xpi_cursor; | |
| 32 | ||
| 33 | const struct rpc_xprt_iter_ops *xpi_ops; | |
| 34 | }; | |
| 35 | ||
| 36 | ||
| 37 | struct rpc_xprt_iter_ops { | |
| 38 | void (*xpi_rewind)(struct rpc_xprt_iter *); | |
| 39 | struct rpc_xprt *(*xpi_xprt)(struct rpc_xprt_iter *); | |
| 40 | struct rpc_xprt *(*xpi_next)(struct rpc_xprt_iter *); | |
| 41 | }; | |
| 42 | ||
| 43 | extern struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt, | |
| 44 | gfp_t gfp_flags); | |
| 45 | ||
| 46 | extern struct rpc_xprt_switch *xprt_switch_get(struct rpc_xprt_switch *xps); | |
| 47 | extern void xprt_switch_put(struct rpc_xprt_switch *xps); | |
| 48 | ||
| 49 | extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps); | |
| 50 | ||
| 51 | extern void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps, | |
| 52 | struct rpc_xprt *xprt); | |
| 53 | extern void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps, | |
| 54 | struct rpc_xprt *xprt); | |
| 55 | ||
| 56 | extern void xprt_iter_init(struct rpc_xprt_iter *xpi, | |
| 57 | struct rpc_xprt_switch *xps); | |
| 58 | ||
| 59 | extern void xprt_iter_init_listall(struct rpc_xprt_iter *xpi, | |
| 60 | struct rpc_xprt_switch *xps); | |
| 61 | ||
| 62 | extern void xprt_iter_destroy(struct rpc_xprt_iter *xpi); | |
| 63 | ||
| 64 | extern struct rpc_xprt_switch *xprt_iter_xchg_switch( | |
| 65 | struct rpc_xprt_iter *xpi, | |
| 66 | struct rpc_xprt_switch *newswitch); | |
| 67 | ||
| 68 | extern struct rpc_xprt *xprt_iter_xprt(struct rpc_xprt_iter *xpi); | |
| 69 | extern struct rpc_xprt *xprt_iter_get_xprt(struct rpc_xprt_iter *xpi); | |
| 70 | extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi); | |
| 71 | ||
| 39e5d2df AA |
72 | extern bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps, |
| 73 | const struct sockaddr *sap); | |
| 80b14d5e | 74 | #endif |