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50 lines
1.1 KiB
50 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* linux/include/linux/sunrpc/timer.h |
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* |
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* Declarations for the RPC transport timer. |
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* |
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* Copyright (C) 2002 Trond Myklebust <[email protected]> |
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*/ |
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#ifndef _LINUX_SUNRPC_TIMER_H |
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#define _LINUX_SUNRPC_TIMER_H |
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#include <linux/atomic.h> |
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struct rpc_rtt { |
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unsigned long timeo; /* default timeout value */ |
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unsigned long srtt[5]; /* smoothed round trip time << 3 */ |
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unsigned long sdrtt[5]; /* smoothed medium deviation of RTT */ |
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int ntimeouts[5]; /* Number of timeouts for the last request */ |
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}; |
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extern void rpc_init_rtt(struct rpc_rtt *rt, unsigned long timeo); |
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extern void rpc_update_rtt(struct rpc_rtt *rt, unsigned timer, long m); |
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extern unsigned long rpc_calc_rto(struct rpc_rtt *rt, unsigned timer); |
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static inline void rpc_set_timeo(struct rpc_rtt *rt, int timer, int ntimeo) |
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{ |
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int *t; |
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if (!timer) |
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return; |
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t = &rt->ntimeouts[timer-1]; |
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if (ntimeo < *t) { |
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if (*t > 0) |
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(*t)--; |
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} else { |
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if (ntimeo > 8) |
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ntimeo = 8; |
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*t = ntimeo; |
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} |
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} |
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static inline int rpc_ntimeo(struct rpc_rtt *rt, int timer) |
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{ |
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if (!timer) |
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return 0; |
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return rt->ntimeouts[timer-1]; |
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} |
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#endif /* _LINUX_SUNRPC_TIMER_H */
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