diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-11-16 14:16:08 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-11-16 14:16:08 -0300 |
commit | 3326a1803802aa4730d32304b003f50720996b31 (patch) | |
tree | 1caa6541b94c3a6acb86cbc142d399598152b170 /include/linux | |
parent | 29f5b648fa0b31ad614c78468b9279e5fa96397a (diff) |
Linux-libre 4.8.8-gnupck-4.8.8-gnu
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/netdevice.h | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index e8d79d4eb..e942c67ea 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2154,7 +2154,10 @@ struct napi_gro_cb { /* 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; @@ -2165,6 +2168,40 @@ struct napi_gro_cb { #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 */ @@ -3862,7 +3899,7 @@ struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev, 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))) |