forked from mirrors/linux
21f0ffaff5
For now, just count the queue length. It is less accurate than counting number of bytes queued, but easier to implement. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/* 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
|