nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

net: use indirect call wrappers at GRO network layer

Browse source 
This avoids an indirect calls for L3 GRO receive path, both
for ipv4 and ipv6, if the latter is not compiled as a module.

Note that when IPv6 is compiled as builtin, it will be checked first,
so we have a single additional compare for the more common path.

v1 -> v2:
 - adapted to INDIRECT_CALL_ changes

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2018-12-14 11:51:58 +01:00 committed by David S. Miller
parent 283c16a2df
commit aaa5d90b39
3 changed files with 18 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
include/net/inet_common.h
View file

@ -2,6 +2,8 @@
#ifndef _INET_COMMON_H
#define _INET_COMMON_H
#include <linux/indirect_call_wrapper.h>
extern const struct proto_ops inet_stream_ops;
extern const struct proto_ops inet_dgram_ops;

15
net/core/dev.c
View file

@ -145,6 +145,7 @@
#include <linux/sctp.h>
#include <net/udp_tunnel.h>
#include <linux/net_namespace.h>
#include <linux/indirect_call_wrapper.h>
#include "net-sysfs.h"
@ -5338,6 +5339,8 @@ static void flush_all_backlogs(void)
put_online_cpus();
}
INDIRECT_CALLABLE_DECLARE(int inet_gro_complete(struct sk_buff *, int));
INDIRECT_CALLABLE_DECLARE(int ipv6_gro_complete(struct sk_buff *, int));
static int napi_gro_complete(struct sk_buff *skb)
{
struct packet_offload *ptype;
@ -5357,7 +5360,9 @@ static int napi_gro_complete(struct sk_buff *skb)
if (ptype->type != type || !ptype->callbacks.gro_complete)
continue;
err = ptype->callbacks.gro_complete(skb, 0);
err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
ipv6_gro_complete, inet_gro_complete,
skb, 0);
break;
}
rcu_read_unlock();
@ -5504,6 +5509,10 @@ static void gro_flush_oldest(struct list_head *head)
napi_gro_complete(oldest);
}
INDIRECT_CALLABLE_DECLARE(struct sk_buff *inet_gro_receive(struct list_head *,
struct sk_buff *));
INDIRECT_CALLABLE_DECLARE(struct sk_buff *ipv6_gro_receive(struct list_head *,
struct sk_buff *));
static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
u32 hash = skb_get_hash_raw(skb) & (GRO_HASH_BUCKETS - 1);
@ -5553,7 +5562,9 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
NAPI_GRO_CB(skb)->csum_valid = 0;
}
pp = ptype->callbacks.gro_receive(gro_head, skb);
pp = INDIRECT_CALL_INET(ptype->callbacks.gro_receive,
ipv6_gro_receive, inet_gro_receive,
gro_head, skb);
break;
}
rcu_read_unlock();

4
net/ipv6/ip6_offload.c
View file

@ -164,7 +164,7 @@ static int ipv6_exthdrs_len(struct ipv6hdr *iph,
return len;
}
static struct sk_buff *ipv6_gro_receive(struct list_head *head,
INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
struct sk_buff *skb)
{
const struct net_offload *ops;
@ -301,7 +301,7 @@ static struct sk_buff *ip4ip6_gro_receive(struct list_head *head,
return inet_gro_receive(head, skb);
}
static int ipv6_gro_complete(struct sk_buff *skb, int nhoff)
INDIRECT_CALLABLE_SCOPE int ipv6_gro_complete(struct sk_buff *skb, int nhoff)
{
const struct net_offload *ops;
struct ipv6hdr *iph = (struct ipv6hdr *)(skb->data + nhoff);