51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/include/linux/sunrpc/timer.h
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*
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* Declarations for the RPC transport timer.
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*
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* Copyright (C) 2002 Trond Myklebust <trond.myklebust@fys.uio.no>
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*/
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#ifndef _LINUX_SUNRPC_TIMER_H
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#define _LINUX_SUNRPC_TIMER_H
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#include <linux/atomic.h>
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struct rpc_rtt {
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unsigned long timeo; /* default timeout value */
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unsigned long srtt[5]; /* smoothed round trip time << 3 */
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unsigned long sdrtt[5]; /* smoothed medium deviation of RTT */
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int ntimeouts[5]; /* Number of timeouts for the last request */
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};
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extern void rpc_init_rtt(struct rpc_rtt *rt, unsigned long timeo);
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extern void rpc_update_rtt(struct rpc_rtt *rt, unsigned timer, long m);
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extern unsigned long rpc_calc_rto(struct rpc_rtt *rt, unsigned timer);
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static inline void rpc_set_timeo(struct rpc_rtt *rt, int timer, int ntimeo)
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{
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int *t;
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if (!timer)
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return;
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t = &rt->ntimeouts[timer-1];
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if (ntimeo < *t) {
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if (*t > 0)
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(*t)--;
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} else {
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if (ntimeo > 8)
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ntimeo = 8;
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*t = ntimeo;
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}
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}
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static inline int rpc_ntimeo(struct rpc_rtt *rt, int timer)
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{
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if (!timer)
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return 0;
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return rt->ntimeouts[timer-1];
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}
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#endif /* _LINUX_SUNRPC_TIMER_H */
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