diff options
| -rw-r--r-- | include/linux/netdevice.h | 26 | ||||
| -rw-r--r-- | net/core/dev.c | 24 | ||||
| -rw-r--r-- | net/ipv4/gre_offload.c | 7 | ||||
| -rw-r--r-- | net/ipv4/udp_offload.c | 5 |
4 files changed, 33 insertions, 29 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index dfc1d8b8bd0f..456eb1fe51e8 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1883,8 +1883,8 @@ struct napi_gro_cb { /* GRO checksum is valid */ u8 csum_valid:1; - /* Number encapsulation layers crossed */ - u8 encapsulation; + /* Number of checksums via CHECKSUM_UNNECESSARY */ + u8 csum_cnt:3; /* used to support CHECKSUM_COMPLETE for tunneling protocols */ __wsum csum; @@ -2179,8 +2179,7 @@ static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, __sum16 check) { return (skb->ip_summed != CHECKSUM_PARTIAL && - (skb->ip_summed != CHECKSUM_UNNECESSARY || - (NAPI_GRO_CB(skb)->encapsulation > skb->encapsulation)) && + NAPI_GRO_CB(skb)->csum_cnt == 0 && (!zero_okay || check)); } @@ -2196,18 +2195,17 @@ static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, return __skb_gro_checksum_complete(skb); } -/* Update skb for CHECKSUM_UNNECESSARY when we verified a top level - * checksum or an encapsulated one during GRO. This saves work - * if we fallback to normal path with the packet. - */ static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) { - if (skb->ip_summed == CHECKSUM_UNNECESSARY) { - if (NAPI_GRO_CB(skb)->encapsulation) - skb->encapsulation = 1; - } else if (skb->ip_summed != CHECKSUM_PARTIAL) { - skb->ip_summed = CHECKSUM_UNNECESSARY; - skb->encapsulation = 0; + if (NAPI_GRO_CB(skb)->csum_cnt > 0) { + /* Consume a checksum from CHECKSUM_UNNECESSARY */ + NAPI_GRO_CB(skb)->csum_cnt--; + } else { + /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we + * verified a new top level checksum or an encapsulated one + * during GRO. This saves work if we fallback to normal path. + */ + __skb_incr_checksum_unnecessary(skb); } } diff --git a/net/core/dev.c b/net/core/dev.c index 26d296c2447c..a6077ef56345 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3962,13 +3962,6 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff gro_list_prepare(napi, skb); - if (skb->ip_summed == CHECKSUM_COMPLETE) { - NAPI_GRO_CB(skb)->csum = skb->csum; - NAPI_GRO_CB(skb)->csum_valid = 1; - } else { - NAPI_GRO_CB(skb)->csum_valid = 0; - } - rcu_read_lock(); list_for_each_entry_rcu(ptype, head, list) { if (ptype->type != type || !ptype->callbacks.gro_receive) @@ -3980,7 +3973,22 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff NAPI_GRO_CB(skb)->flush = 0; NAPI_GRO_CB(skb)->free = 0; NAPI_GRO_CB(skb)->udp_mark = 0; - NAPI_GRO_CB(skb)->encapsulation = 0; + + /* Setup for GRO checksum validation */ + switch (skb->ip_summed) { + case CHECKSUM_COMPLETE: + NAPI_GRO_CB(skb)->csum = skb->csum; + NAPI_GRO_CB(skb)->csum_valid = 1; + NAPI_GRO_CB(skb)->csum_cnt = 0; + break; + case CHECKSUM_UNNECESSARY: + NAPI_GRO_CB(skb)->csum_cnt = skb->csum_level + 1; + NAPI_GRO_CB(skb)->csum_valid = 0; + break; + default: + NAPI_GRO_CB(skb)->csum_cnt = 0; + NAPI_GRO_CB(skb)->csum_valid = 0; + } pp = ptype->callbacks.gro_receive(&napi->gro_list, skb); break; diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index d1bd16937d93..a4d7965fb880 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -172,12 +172,9 @@ static struct sk_buff **gre_gro_receive(struct sk_buff **head, } /* Don't bother verifying checksum if we're going to flush anyway. */ - if (greh->flags & GRE_CSUM) { - if (!NAPI_GRO_CB(skb)->flush && - skb_gro_checksum_simple_validate(skb)) + if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush && + skb_gro_checksum_simple_validate(skb)) goto out_unlock; - NAPI_GRO_CB(skb)->encapsulation++; - } flush = 0; diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 8ed460e3753c..a6adff98382a 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -238,12 +238,13 @@ struct sk_buff **udp_gro_receive(struct sk_buff **head, struct sk_buff *skb, int flush = 1; if (NAPI_GRO_CB(skb)->udp_mark || - (!skb->encapsulation && !NAPI_GRO_CB(skb)->csum_valid)) + (skb->ip_summed != CHECKSUM_PARTIAL && + NAPI_GRO_CB(skb)->csum_cnt == 0 && + !NAPI_GRO_CB(skb)->csum_valid)) goto out; /* mark that this skb passed once through the udp gro layer */ NAPI_GRO_CB(skb)->udp_mark = 1; - NAPI_GRO_CB(skb)->encapsulation++; rcu_read_lock(); uo_priv = rcu_dereference(udp_offload_base); |