From d2e1446d81725c351dc73a03b397ce043fb18452 Mon Sep 17 00:00:00 2001 From: Meizu OpenSource Date: Mon, 15 Aug 2016 10:19:42 +0800 Subject: first commit --- include/linux/sunrpc/timer.h | 49 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 include/linux/sunrpc/timer.h (limited to 'include/linux/sunrpc/timer.h') diff --git a/include/linux/sunrpc/timer.h b/include/linux/sunrpc/timer.h new file mode 100644 index 000000000..697d6e69d --- /dev/null +++ b/include/linux/sunrpc/timer.h @@ -0,0 +1,49 @@ +/* + * linux/include/linux/sunrpc/timer.h + * + * Declarations for the RPC transport timer. + * + * Copyright (C) 2002 Trond Myklebust + */ + +#ifndef _LINUX_SUNRPC_TIMER_H +#define _LINUX_SUNRPC_TIMER_H + +#include + +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 */ -- cgit v1.2.3