/* Used to determine if flush_id can be ignored */
u8 is_atomic:1;
- /* 5 bit hole */
+ /* Number of gro_receive callbacks this packet already went through */
+ u8 recursion_counter:4;
+
+ /* 1 bit hole */
/* used to support CHECKSUM_COMPLETE for tunneling protocols */
__wsum csum;
#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
+#define GRO_RECURSION_LIMIT 15
+static inline int gro_recursion_inc_test(struct sk_buff *skb)
+{
+ return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
+}
+
+typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *);
+static inline struct sk_buff **call_gro_receive(gro_receive_t cb,
+ struct sk_buff **head,
+ struct sk_buff *skb)
+{
+ if (unlikely(gro_recursion_inc_test(skb))) {
+ NAPI_GRO_CB(skb)->flush |= 1;
+ return NULL;
+ }
+
+ return cb(head, skb);
+}
+
+typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **,
+ struct sk_buff *);
+static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb,
+ struct sock *sk,
+ struct sk_buff **head,
+ struct sk_buff *skb)
+{
+ if (unlikely(gro_recursion_inc_test(skb))) {
+ NAPI_GRO_CB(skb)->flush |= 1;
+ return NULL;
+ }
+
+ return cb(sk, head, skb);
+}
+
struct packet_type {
__be16 type; /* This is really htons(ether_type). */
struct net_device *dev; /* NULL is wildcarded here */
ldev = netdev_all_lower_get_next(dev, &(iter)))
#define netdev_for_each_all_lower_dev_rcu(dev, ldev, iter) \
- for (iter = (dev)->all_adj_list.lower.next, \
+ for (iter = &(dev)->all_adj_list.lower, \
ldev = netdev_all_lower_get_next_rcu(dev, &(iter)); \
ldev; \
ldev = netdev_all_lower_get_next_rcu(dev, &(iter)))