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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; 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