path: root/net/ipv4/af_inet.c
diff options
authorPaolo Abeni <pabeni@redhat.com>2018-12-14 11:51:59 +0100
committerDavid S. Miller <davem@davemloft.net>2018-12-15 13:23:02 -0800
commit028e0a4766844e7eeb31b93479ea6dd40cfc2895 (patch)
tree4a2e159b4ddfe4548de2b003bae3ca7d15f6a11b /net/ipv4/af_inet.c
parentnet: use indirect call wrappers at GRO network layer (diff)
net: use indirect call wrappers at GRO transport layer
This avoids an indirect call in the receive path for TCP and UDP packets. TCP takes precedence on UDP, so that we have a single additional conditional in the common case. When IPV6 is build as module, all gro symbols except UDPv6 are builtin, while the latter belong to the ipv6 module, so we need some special care. v1 -> v2: - adapted to INDIRECT_CALL_ changes v2 -> v3: - fix build issue with CONFIG_IPV6=m Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
1 files changed, 11 insertions, 2 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 326c422c22f8..0dfb72c46671 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1385,6 +1385,10 @@ out:
+INDIRECT_CALLABLE_DECLARE(struct sk_buff *tcp4_gro_receive(struct list_head *,
+ struct sk_buff *));
+INDIRECT_CALLABLE_DECLARE(struct sk_buff *udp4_gro_receive(struct list_head *,
+ struct sk_buff *));
struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
const struct net_offload *ops;
@@ -1494,7 +1498,8 @@ struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
skb_gro_pull(skb, sizeof(*iph));
skb_set_transport_header(skb, skb_gro_offset(skb));
- pp = call_gro_receive(ops->callbacks.gro_receive, head, skb);
+ pp = indirect_call_gro_receive(tcp4_gro_receive, udp4_gro_receive,
+ ops->callbacks.gro_receive, head, skb);
@@ -1556,6 +1561,8 @@ int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
return -EINVAL;
+INDIRECT_CALLABLE_DECLARE(int tcp4_gro_complete(struct sk_buff *, int));
+INDIRECT_CALLABLE_DECLARE(int udp4_gro_complete(struct sk_buff *, int));
int inet_gro_complete(struct sk_buff *skb, int nhoff)
__be16 newlen = htons(skb->len - nhoff);
@@ -1581,7 +1588,9 @@ int inet_gro_complete(struct sk_buff *skb, int nhoff)
* because any hdr with option will have been flushed in
* inet_gro_receive().
- err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph));
+ err = INDIRECT_CALL_2(ops->callbacks.gro_complete,
+ tcp4_gro_complete, udp4_gro_complete,
+ skb, nhoff + sizeof(*iph));