From 0a5ebb8000c5362be368df9d197943deb06b6916 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 9 May 2011 13:22:43 -0700 Subject: [PATCH] ipv4: Pass explicit daddr arg to ip_send_reply(). This eliminates an access to rt->rt_src. Signed-off-by: David S. Miller --- include/net/ip.h | 4 ++-- net/ipv4/ip_output.c | 7 +++---- net/ipv4/tcp_ipv4.c | 4 ++-- 3 files changed, 7 insertions(+), 8 deletions(-) diff --git a/include/net/ip.h b/include/net/ip.h index 0b30d3ab4a30..66dd49149208 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -174,8 +174,8 @@ static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg) return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0; } -void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg, - unsigned int len); +void ip_send_reply(struct sock *sk, struct sk_buff *skb, __be32 daddr, + struct ip_reply_arg *arg, unsigned int len); struct ipv4_config { int log_martians; diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index cd89d22902a9..70778d48aa7b 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -1459,20 +1459,19 @@ static int ip_reply_glue_bits(void *dptr, char *to, int offset, * Should run single threaded per socket because it uses the sock * structure to pass arguments. */ -void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg, - unsigned int len) +void ip_send_reply(struct sock *sk, struct sk_buff *skb, __be32 daddr, + struct ip_reply_arg *arg, unsigned int len) { struct inet_sock *inet = inet_sk(sk); struct ip_options_data replyopts; struct ipcm_cookie ipc; struct flowi4 fl4; - __be32 daddr; struct rtable *rt = skb_rtable(skb); if (ip_options_echo(&replyopts.opt.opt, skb)) return; - daddr = ipc.addr = rt->rt_src; + ipc.addr = daddr; ipc.opt = NULL; ipc.tx_flags = 0; diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 2b655031b392..f67fb34e16e5 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -651,7 +651,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb) arg.flags = (sk && inet_sk(sk)->transparent) ? IP_REPLY_ARG_NOSRCCHECK : 0; net = dev_net(skb_dst(skb)->dev); - ip_send_reply(net->ipv4.tcp_sock, skb, + ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr, &arg, arg.iov[0].iov_len); TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); @@ -726,7 +726,7 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack, if (oif) arg.bound_dev_if = oif; - ip_send_reply(net->ipv4.tcp_sock, skb, + ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr, &arg, arg.iov[0].iov_len); TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);