[CLEANUP] fwrr: ensure that we never overflow in placements
Now we can compute the max place depending on the number of servers,
maximum weight and weight scale. The formula has been stored as a
comment so that it's easy to choose between smooth weight ramp up
and high number of servers. The default scale has been set to 16,
which permits 4000 servers with a granularity of 6% in the worst
case (weight=1).
diff --git a/include/types/server.h b/include/types/server.h
index 36ae7cb..614775b 100644
--- a/include/types/server.h
+++ b/include/types/server.h
@@ -62,6 +62,12 @@
#define SRV_CHK_RUNNING 0x0002 /* server seen as running */
#define SRV_CHK_DISABLE 0x0004 /* server returned a "disable" code */
+/* various constants */
+#define SRV_UWGHT_RANGE 256
+#define SRV_UWGHT_MAX (SRV_UWGHT_RANGE - 1)
+#define SRV_EWGHT_RANGE (SRV_UWGHT_RANGE * BE_WEIGHT_SCALE)
+#define SRV_EWGHT_MAX (SRV_UWGHT_MAX * BE_WEIGHT_SCALE)
+
struct server {
struct server *next;
int state; /* server state (SRV_*) */