diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/sunrpc/timer.h |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/sunrpc/timer.h')
-rw-r--r-- | include/linux/sunrpc/timer.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/linux/sunrpc/timer.h b/include/linux/sunrpc/timer.h new file mode 100644 index 000000000000..a67fd734c73b --- /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 <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 */ |