Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/include/linux/sunrpc/timer.h | |
3 | * | |
4 | * Declarations for the RPC transport timer. | |
5 | * | |
6 | * Copyright (C) 2002 Trond Myklebust <trond.myklebust@fys.uio.no> | |
7 | */ | |
8 | ||
9 | #ifndef _LINUX_SUNRPC_TIMER_H | |
10 | #define _LINUX_SUNRPC_TIMER_H | |
11 | ||
60063497 | 12 | #include <linux/atomic.h> |
1da177e4 LT |
13 | |
14 | struct rpc_rtt { | |
15 | unsigned long timeo; /* default timeout value */ | |
16 | unsigned long srtt[5]; /* smoothed round trip time << 3 */ | |
17 | unsigned long sdrtt[5]; /* smoothed medium deviation of RTT */ | |
18 | int ntimeouts[5]; /* Number of timeouts for the last request */ | |
19 | }; | |
20 | ||
21 | ||
22 | extern void rpc_init_rtt(struct rpc_rtt *rt, unsigned long timeo); | |
23 | extern void rpc_update_rtt(struct rpc_rtt *rt, unsigned timer, long m); | |
24 | extern unsigned long rpc_calc_rto(struct rpc_rtt *rt, unsigned timer); | |
25 | ||
26 | static inline void rpc_set_timeo(struct rpc_rtt *rt, int timer, int ntimeo) | |
27 | { | |
28 | int *t; | |
29 | if (!timer) | |
30 | return; | |
31 | t = &rt->ntimeouts[timer-1]; | |
32 | if (ntimeo < *t) { | |
33 | if (*t > 0) | |
34 | (*t)--; | |
35 | } else { | |
36 | if (ntimeo > 8) | |
37 | ntimeo = 8; | |
38 | *t = ntimeo; | |
39 | } | |
40 | } | |
41 | ||
42 | static inline int rpc_ntimeo(struct rpc_rtt *rt, int timer) | |
43 | { | |
44 | if (!timer) | |
45 | return 0; | |
46 | return rt->ntimeouts[timer-1]; | |
47 | } | |
48 | ||
49 | #endif /* _LINUX_SUNRPC_TIMER_H */ |