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Filename/usr/src/linux-headers-3.13.0-24/include/linux/sunrpc/timer.h
Size1.11 kb
Permissionrw-r--r--
Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 03:03
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/*
* linux/include/linux/sunrpc/timer.h
*
* Declarations for the RPC transport timer.
*
* Copyright (C) 2002 Trond Myklebust <[email protected]>
*/

#ifndef _LINUX_SUNRPC_TIMER_H
#define _LINUX_SUNRPC_TIMER_H

#include <linux/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 */