openvswitch: Rename key_len to key_end

Key_end is a better name describing the ending boundary than key_len.
Rename those variables to make it less confusing.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>

2 files changed, 17 insertions, 16 deletions

diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 2b4785590b56..80bcb96467a5 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -997,10 +997,11 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
         return 0;
 }
 
-static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len)
+static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start,
+                         int key_end)
 {
         return jhash2((u32 *)((u8 *)key + key_start),
-                      DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0);
+                      DIV_ROUND_UP(key_end - key_start, sizeof(u32)), 0);
 }
 
 static int flow_key_start(const struct sw_flow_key *key)
@@ -1012,31 +1013,31 @@ static int flow_key_start(const struct sw_flow_key *key)
 }
 
 static bool __cmp_key(const struct sw_flow_key *key1,
-                const struct sw_flow_key *key2,  int key_start, int key_len)
+                const struct sw_flow_key *key2,  int key_start, int key_end)
 {
         return !memcmp((u8 *)key1 + key_start,
-                        (u8 *)key2 + key_start, (key_len - key_start));
+                        (u8 *)key2 + key_start, (key_end - key_start));
 }
 
 static bool __flow_cmp_key(const struct sw_flow *flow,
-                const struct sw_flow_key *key, int key_start, int key_len)
+                const struct sw_flow_key *key, int key_start, int key_end)
 {
-        return __cmp_key(&flow->key, key, key_start, key_len);
+        return __cmp_key(&flow->key, key, key_start, key_end);
 }
 
 static bool __flow_cmp_unmasked_key(const struct sw_flow *flow,
-                  const struct sw_flow_key *key, int key_start, int key_len)
+                  const struct sw_flow_key *key, int key_start, int key_end)
 {
-        return __cmp_key(&flow->unmasked_key, key, key_start, key_len);
+        return __cmp_key(&flow->unmasked_key, key, key_start, key_end);
 }
 
 bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
-                const struct sw_flow_key *key, int key_len)
+                const struct sw_flow_key *key, int key_end)
 {
         int key_start;
         key_start = flow_key_start(key);
 
-        return __flow_cmp_unmasked_key(flow, key, key_start, key_len);
+        return __flow_cmp_unmasked_key(flow, key, key_start, key_end);
 
 }
 
@@ -1044,11 +1045,11 @@ struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table,
                                        struct sw_flow_match *match)
 {
         struct sw_flow_key *unmasked = match->key;
-        int key_len = match->range.end;
+        int key_end = match->range.end;
         struct sw_flow *flow;
 
         flow = ovs_flow_lookup(table, unmasked);
-        if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_len)))
+        if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end)))
                 flow = NULL;
 
         return flow;
@@ -1061,16 +1062,16 @@ static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table,
         struct sw_flow *flow;
         struct hlist_head *head;
         int key_start = mask->range.start;
-        int key_len = mask->range.end;
+        int key_end = mask->range.end;
         u32 hash;
         struct sw_flow_key masked_key;
 
         ovs_flow_key_mask(&masked_key, flow_key, mask);
-        hash = ovs_flow_hash(&masked_key, key_start, key_len);
+        hash = ovs_flow_hash(&masked_key, key_start, key_end);
         head = find_bucket(table, hash);
         hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) {
                 if (flow->mask == mask &&
-                    __flow_cmp_key(flow, &masked_key, key_start, key_len))
+                    __flow_cmp_key(flow, &masked_key, key_start, key_end))
                         return flow;
         }
         return NULL;
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index d08dcf78dbf3..e79305184b79 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -243,7 +243,7 @@ int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb,
                            const struct ovs_key_ipv4_tunnel *output);
 
 bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
-                const struct sw_flow_key *key, int key_len);
+                const struct sw_flow_key *key, int key_end);
 
 struct sw_flow_mask {
         int ref_count;