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authorEric Dumazet <eric.dumazet@gmail.com>2010-06-03 22:23:57 +0000
committerDavid S. Miller <davem@davemloft.net>2010-06-07 01:08:10 -0700
commit1789a640f55658d9a54c1868cc3405e4d85dbd8e (patch)
tree4ff0efbe06c9f8ab2ff715bfcda91dc31d7c7f65 /net/ipv6/raw.c
parentfe33147a58e7d1d3086bf823aabfd491d843be82 (diff)
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>
Diffstat (limited to 'net/ipv6/raw.c')
-rw-r--r--net/ipv6/raw.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 864eb8e03b1b..968b96490729 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -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,