diff options
| -rw-r--r-- | include/net/protocol.h | 3 | ||||
| -rw-r--r-- | net/ipv6/af_inet6.c | 107 |
2 files changed, 105 insertions, 5 deletions
diff --git a/include/net/protocol.h b/include/net/protocol.h index cb2965aa1b6..ffa5b8b1f1d 100644 --- a/include/net/protocol.h +++ b/include/net/protocol.h @@ -59,6 +59,9 @@ struct inet6_protocol int (*gso_send_check)(struct sk_buff *skb); struct sk_buff *(*gso_segment)(struct sk_buff *skb, int features); + struct sk_buff **(*gro_receive)(struct sk_buff **head, + struct sk_buff *skb); + int (*gro_complete)(struct sk_buff *skb); unsigned int flags; /* INET6_PROTO_xxx */ }; diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 437b750b98f..94f74f5b0cb 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -672,8 +672,7 @@ int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) EXPORT_SYMBOL_GPL(ipv6_opt_accepted); -static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb, - int proto) +static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) { struct inet6_protocol *ops = NULL; @@ -704,7 +703,7 @@ static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb, __skb_pull(skb, len); } - return ops; + return proto; } static int ipv6_gso_send_check(struct sk_buff *skb) @@ -721,7 +720,9 @@ static int ipv6_gso_send_check(struct sk_buff *skb) err = -EPROTONOSUPPORT; rcu_read_lock(); - ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); + ops = rcu_dereference(inet6_protos[ + ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); + if (likely(ops && ops->gso_send_check)) { skb_reset_transport_header(skb); err = ops->gso_send_check(skb); @@ -757,7 +758,9 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) segs = ERR_PTR(-EPROTONOSUPPORT); rcu_read_lock(); - ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); + ops = rcu_dereference(inet6_protos[ + ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); + if (likely(ops && ops->gso_segment)) { skb_reset_transport_header(skb); segs = ops->gso_segment(skb, features); @@ -777,11 +780,105 @@ out: return segs; } +struct ipv6_gro_cb { + struct napi_gro_cb napi; + int proto; +}; + +#define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) + +static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, + struct sk_buff *skb) +{ + struct inet6_protocol *ops; + struct sk_buff **pp = NULL; + struct sk_buff *p; + struct ipv6hdr *iph; + unsigned int nlen; + int flush = 1; + int proto; + + if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) + goto out; + + iph = ipv6_hdr(skb); + __skb_pull(skb, sizeof(*iph)); + + flush += ntohs(iph->payload_len) != skb->len; + + rcu_read_lock(); + proto = ipv6_gso_pull_exthdrs(skb, iph->nexthdr); + IPV6_GRO_CB(skb)->proto = proto; + ops = rcu_dereference(inet6_protos[proto]); + if (!ops || !ops->gro_receive) + goto out_unlock; + + flush--; + skb_reset_transport_header(skb); + nlen = skb_network_header_len(skb); + + for (p = *head; p; p = p->next) { + struct ipv6hdr *iph2; + + if (!NAPI_GRO_CB(p)->same_flow) + continue; + + iph2 = ipv6_hdr(p); + + /* All fields must match except length. */ + if (nlen != skb_network_header_len(p) || + memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || + memcmp(&iph->nexthdr, &iph2->nexthdr, + nlen - offsetof(struct ipv6hdr, nexthdr))) { + NAPI_GRO_CB(p)->same_flow = 0; + continue; + } + + NAPI_GRO_CB(p)->flush |= flush; + } + + NAPI_GRO_CB(skb)->flush |= flush; + + pp = ops->gro_receive(head, skb); + +out_unlock: + rcu_read_unlock(); + +out: + NAPI_GRO_CB(skb)->flush |= flush; + + return pp; +} + +static int ipv6_gro_complete(struct sk_buff *skb) +{ + struct inet6_protocol *ops; + struct ipv6hdr *iph = ipv6_hdr(skb); + int err = -ENOSYS; + + iph->payload_len = htons(skb->len - skb_network_offset(skb) - + sizeof(*iph)); + + rcu_read_lock(); + ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); + if (WARN_ON(!ops || !ops->gro_complete)) + goto out_unlock; + + err = ops->gro_complete(skb); + +out_unlock: + rcu_read_unlock(); + + return err; +} + static struct packet_type ipv6_packet_type = { .type = __constant_htons(ETH_P_IPV6), .func = ipv6_rcv, .gso_send_check = ipv6_gso_send_check, .gso_segment = ipv6_gso_segment, + .gro_receive = ipv6_gro_receive, + .gro_complete = ipv6_gro_complete, }; static int __init ipv6_packet_init(void) |