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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 */