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