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/*

 *  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 */