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/* SPDX-License-Identifier: GPL-2.0 */
/*
* RPC client multipathing definitions
*
* Copyright (c) 2015, 2016, Primary Data, Inc. All rights reserved.
*
* Trond Myklebust <trond.myklebust@primarydata.com>
*/
#ifndef _NET_SUNRPC_XPRTMULTIPATH_H
#define _NET_SUNRPC_XPRTMULTIPATH_H
struct rpc_xprt_iter_ops;
struct rpc_xprt_switch {
spinlock_t xps_lock;
struct kref xps_kref;
unsigned int xps_nxprts;
unsigned int xps_nactive;
atomic_long_t xps_queuelen;
struct list_head xps_xprt_list;
struct net * xps_net;
const struct rpc_xprt_iter_ops *xps_iter_ops;
struct rcu_head xps_rcu;
};
struct rpc_xprt_iter {
struct rpc_xprt_switch __rcu *xpi_xpswitch;
struct rpc_xprt * xpi_cursor;
const struct rpc_xprt_iter_ops *xpi_ops;
};
struct rpc_xprt_iter_ops {
void (*xpi_rewind)(struct rpc_xprt_iter *);
struct rpc_xprt *(*xpi_xprt)(struct rpc_xprt_iter *);
struct rpc_xprt *(*xpi_next)(struct rpc_xprt_iter *);
};
extern struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
gfp_t gfp_flags);
extern struct rpc_xprt_switch *xprt_switch_get(struct rpc_xprt_switch *xps);
extern void xprt_switch_put(struct rpc_xprt_switch *xps);
extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps);
extern void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
struct rpc_xprt *xprt);
extern void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
struct rpc_xprt *xprt);
extern void xprt_iter_init(struct rpc_xprt_iter *xpi,
struct rpc_xprt_switch *xps);
extern void xprt_iter_init_listall(struct rpc_xprt_iter *xpi,
struct rpc_xprt_switch *xps);
extern void xprt_iter_destroy(struct rpc_xprt_iter *xpi);
extern struct rpc_xprt_switch *xprt_iter_xchg_switch(
struct rpc_xprt_iter *xpi,
struct rpc_xprt_switch *newswitch);
extern struct rpc_xprt *xprt_iter_xprt(struct rpc_xprt_iter *xpi);
extern struct rpc_xprt *xprt_iter_get_xprt(struct rpc_xprt_iter *xpi);
extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);
extern bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
const struct sockaddr *sap);
#endif