root/include/linux/sunrpc/timer.h

INCLUDED FROM

DEFINITIONS

1. rpc_set_timeo
2. rpc_ntimeo

/*
 *  linux/include/linux/sunrpc/timer.h
 *
 *  Declarations for the RPC transport timer.
 *
 *  Copyright (C) 2002 Trond Myklebust <trond.myklebust@fys.uio.no>
 */

#ifndef _LINUX_SUNRPC_TIMER_H
#define _LINUX_SUNRPC_TIMER_H

#include <asm/atomic.h>

struct rpc_rtt {
        unsigned long timeo;    /* default timeout value */
        unsigned long srtt[5];  /* smoothed round trip time << 3 */
        unsigned long sdrtt[5]; /* smoothed medium deviation of RTT */
        int ntimeouts[5];       /* Number of timeouts for the last request */
};


extern void rpc_init_rtt(struct rpc_rtt *rt, unsigned long timeo);
extern void rpc_update_rtt(struct rpc_rtt *rt, unsigned timer, long m);
extern unsigned long rpc_calc_rto(struct rpc_rtt *rt, unsigned timer);

static inline void rpc_set_timeo(struct rpc_rtt *rt, int timer, int ntimeo)
{
        int *t;
        if (!timer)
                return;
        t = &rt->ntimeouts[timer-1];
        if (ntimeo < *t) {
                if (*t > 0)
                        (*t)--;
        } else {
                if (ntimeo > 8)
                        ntimeo = 8;
                *t = ntimeo;
        }
}

static inline int rpc_ntimeo(struct rpc_rtt *rt, int timer)
{
        if (!timer)
                return 0;
        return rt->ntimeouts[timer-1];
}

#endif /* _LINUX_SUNRPC_TIMER_H */