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OpenCloudOS-Kernel
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raw: avoid two atomics in xmit 

Avoid two atomic ops per raw_send_hdrinc() call

Avoid two atomic ops per raw6_send_hdrinc() call

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-06-03 22:23:57 +00:00 committed by David S. Miller
parent fe33147a58
commit 1789a640f5
2 changed files with 12 additions and 8 deletions
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8
net/ipv4/raw.c
View File

@ -314,7 +314,7 @@ int raw_rcv(struct sock *sk, struct sk_buff *skb)
}
static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
struct rtable *rt,
struct rtable **rtp,
unsigned int flags)
{
struct inet_sock *inet = inet_sk(sk);
@ -323,6 +323,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
struct sk_buff *skb;
unsigned int iphlen;
int err;
struct rtable *rt = *rtp;
if (length > rt->u.dst.dev->mtu) {
ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
@ -341,7 +342,8 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb_dst_set(skb, dst_clone(&rt->u.dst));
skb_dst_set(skb, &rt->u.dst);
*rtp = NULL;
skb_reset_network_header(skb);
iph = ip_hdr(skb);
@ -576,7 +578,7 @@ back_from_confirm:
if (inet->hdrincl)
err = raw_send_hdrinc(sk, msg->msg_iov, len,
rt, msg->msg_flags);
&rt, msg->msg_flags);
else {
if (!ipc.addr)

12
net/ipv6/raw.c
View File

@ -602,13 +602,14 @@ out:
}
static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
struct flowi *fl, struct rt6_info *rt,
struct flowi *fl, struct dst_entry **dstp,
unsigned int flags)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct ipv6hdr *iph;
struct sk_buff *skb;
int err;
struct rt6_info *rt = (struct rt6_info *)*dstp;
if (length > rt->u.dst.dev->mtu) {
ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu);
@ -626,7 +627,8 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb_dst_set(skb, dst_clone(&rt->u.dst));
skb_dst_set(skb, &rt->u.dst);
*dstp = NULL;
skb_put(skb, length);
skb_reset_network_header(skb);
@ -886,9 +888,9 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
goto do_confirm;
back_from_confirm:
if (inet->hdrincl) {
err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags);
} else {
if (inet->hdrincl)
err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, &dst, msg->msg_flags);
else {
lock_sock(sk);
err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst,