rfs: better sizing of dev_flow_table

Aim of this patch is to provide full range of rps_flow_cnt on 64bit arches.

Theorical limit on number of flows is 2^32

Fix some buggy RPS/RFS macros as well.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Tom Herbert <therbert@google.com>
CC: Xi Wang <xi.wang@gmail.com>
CC: Laurent Chavey <chavey@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 603730804da5..a776a675c0e5 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -597,7 +597,7 @@ struct rps_map {
 	struct rcu_head rcu;
 	u16 cpus[0];
 };
-#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
+#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
 
 /*
  * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
@@ -621,7 +621,7 @@ struct rps_dev_flow_table {
 	struct rps_dev_flow flows[0];
 };
 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
-    (_num * sizeof(struct rps_dev_flow)))
+    ((_num) * sizeof(struct rps_dev_flow)))
 
 /*
  * The rps_sock_flow_table contains mappings of flows to the last CPU
@@ -632,7 +632,7 @@ struct rps_sock_flow_table {
 	u16 ents[0];
 };
 #define	RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
-    (_num * sizeof(u16)))
+    ((_num) * sizeof(u16)))
 
 #define RPS_NO_CPU 0xffff
 
@@ -684,7 +684,7 @@ struct xps_map {
 	struct rcu_head rcu;
 	u16 queues[0];
 };
-#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
+#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map))	\
     / sizeof(u16))