fib: fix load-balance and replicate dpos buckets overflow

[vpp.git] / src / vnet / dpo / load_balance.h

diff --git a/src/vnet/dpo/load_balance.h b/src/vnet/dpo/load_balance.h
index 5428e20..3605d82 100644 (file)
--- a/src/vnet/dpo/load_balance.h
+++ b/src/vnet/dpo/load_balance.h
@@ -49,6 +49,12 @@ typedef struct load_balance_main_t_
 
 extern load_balance_main_t load_balance_main;
 
+/**
+ * The maximum number of buckets that a load-balance object can have
+ * This must not overflow the lb_n_buckets field
+ */
+#define LB_MAX_BUCKETS 8192
+
 /**
  * The number of buckets that a load-balance object can have and still
  * fit in one cache-line
@@ -176,6 +182,10 @@ typedef struct load_balance_t_ {
 
 STATIC_ASSERT(sizeof(load_balance_t) <= CLIB_CACHE_LINE_BYTES,
              "A load_balance object size exceeds one cacheline");
+STATIC_ASSERT (LB_MAX_BUCKETS <= CLIB_U16_MAX,
+              "Too many buckets for load_balance object");
+STATIC_ASSERT (LB_MAX_BUCKETS && !(LB_MAX_BUCKETS & (LB_MAX_BUCKETS - 1)),
+              "LB_MAX_BUCKETS must be a power of 2");
 
 /**
  * Flags controlling load-balance formatting/display