AcoSail/kernel_optimize_test
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ipv4: udp: Eliminate remaining uses of rt->rt_src

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We already track and pass around the correct flow key,
so simply use it in udp_send_skb().

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2011-05-09 13:31:04 -07:00
parent 9f6abb5f17
commit 79ab053145
1 changed files with 6 additions and 7 deletions
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13
net/ipv4/udp.c
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@ -706,12 +706,11 @@ static void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst)
}
}
static int udp_send_skb(struct sk_buff *skb, __be32 daddr, __be32 dport)
static int udp_send_skb(struct sk_buff *skb, struct flowi4 *fl4)
{
struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct udphdr *uh;
struct rtable *rt = (struct rtable *)skb_dst(skb);
int err = 0;
int is_udplite = IS_UDPLITE(sk);
int offset = skb_transport_offset(skb);
@ -723,7 +722,7 @@ static int udp_send_skb(struct sk_buff *skb, __be32 daddr, __be32 dport)
*/
uh = udp_hdr(skb);
uh->source = inet->inet_sport;
uh->dest = dport;
uh->dest = fl4->fl4_dport;
uh->len = htons(len);
uh->check = 0;
@ -737,14 +736,14 @@ static int udp_send_skb(struct sk_buff *skb, __be32 daddr, __be32 dport)
} else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */
udp4_hwcsum(skb, rt->rt_src, daddr);
udp4_hwcsum(skb, fl4->saddr, fl4->daddr);
goto send;
} else
csum = udp_csum(skb);
/* add protocol-dependent pseudo-header */
uh->check = csum_tcpudp_magic(rt->rt_src, daddr, len,
uh->check = csum_tcpudp_magic(fl4->saddr, fl4->daddr, len,
sk->sk_protocol, csum);
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
@ -778,7 +777,7 @@ static int udp_push_pending_frames(struct sock *sk)
if (!skb)
goto out;
err = udp_send_skb(skb, fl4->daddr, fl4->fl4_dport);
err = udp_send_skb(skb, fl4);
out:
up->len = 0;
@ -963,7 +962,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
msg->msg_flags);
err = PTR_ERR(skb);
if (skb && !IS_ERR(skb))
err = udp_send_skb(skb, daddr, dport);
err = udp_send_skb(skb, fl4);
goto out;
}