diff options
Diffstat (limited to 'net/ipv4/ip_input.c')
| -rw-r--r-- | net/ipv4/ip_input.c | 54 |
1 files changed, 48 insertions, 6 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 914240830bdf..24b9b0210aeb 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -307,7 +307,8 @@ drop: return true; } -static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb) +static int ip_rcv_finish_core(struct net *net, struct sock *sk, + struct sk_buff *skb) { const struct iphdr *iph = ip_hdr(skb); int (*edemux)(struct sk_buff *skb); @@ -393,7 +394,7 @@ static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb) goto drop; } - return dst_input(skb); + return NET_RX_SUCCESS; drop: kfree_skb(skb); @@ -405,6 +406,15 @@ drop_error: goto drop; } +static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb) +{ + int ret = ip_rcv_finish_core(net, sk, skb); + + if (ret != NET_RX_DROP) + ret = dst_input(skb); + return ret; +} + /* * Main IP Receive routine. */ @@ -515,15 +525,47 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, ip_rcv_finish); } -static void ip_sublist_rcv(struct list_head *head, struct net_device *dev, - struct net *net) +static void ip_sublist_rcv_finish(struct list_head *head) { struct sk_buff *skb, *next; + list_for_each_entry_safe(skb, next, head, list) + dst_input(skb); +} + +static void ip_list_rcv_finish(struct net *net, struct sock *sk, + struct list_head *head) +{ + struct dst_entry *curr_dst = NULL; + struct sk_buff *skb, *next; + struct list_head sublist; + + list_for_each_entry_safe(skb, next, head, list) { + struct dst_entry *dst; + + if (ip_rcv_finish_core(net, sk, skb) == NET_RX_DROP) + continue; + + dst = skb_dst(skb); + if (curr_dst != dst) { + /* dispatch old sublist */ + list_cut_before(&sublist, head, &skb->list); + if (!list_empty(&sublist)) + ip_sublist_rcv_finish(&sublist); + /* start new sublist */ + curr_dst = dst; + } + } + /* dispatch final sublist */ + ip_sublist_rcv_finish(head); +} + +static void ip_sublist_rcv(struct list_head *head, struct net_device *dev, + struct net *net) +{ NF_HOOK_LIST(NFPROTO_IPV4, NF_INET_PRE_ROUTING, net, NULL, head, dev, NULL, ip_rcv_finish); - list_for_each_entry_safe(skb, next, head, list) - ip_rcv_finish(net, NULL, skb); + ip_list_rcv_finish(net, NULL, head); } /* Receive a list of IP packets */ |