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 */