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| author | Cong Wang <cwang@twopensource.com> | 2014-10-15 14:33:22 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-17 12:02:57 -0400 |
| commit | 461b74c391c4ec9c766794e158508c357d8952e6 (patch) | |
| tree | 19cfb1a79b6dc5c9141022985c3917fc2d90b7a1 | |
| parent | e25f866fbc8a4bf387b5dbe8e25aa5b07e55c74f (diff) | |
| download | linux-exynos-461b74c391c4ec9c766794e158508c357d8952e6.tar.gz linux-exynos-461b74c391c4ec9c766794e158508c357d8952e6.tar.bz2 linux-exynos-461b74c391c4ec9c766794e158508c357d8952e6.zip | |
ipv4: clean up cookie_v4_check()
We can retrieve opt from skb, no need to pass it as a parameter.
And opt should always be non-NULL, no need to check.
Cc: Krzysztof Kolasa <kkolasa@winsoft.pl>
Cc: Eric Dumazet <edumazet@google.com>
Tested-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/tcp.h | 5 | ||||
| -rw-r--r-- | net/ipv4/syncookies.c | 6 | ||||
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 2 |
3 files changed, 6 insertions, 7 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 869637a7caf7..3a4bbbfdcf8d 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -468,8 +468,7 @@ void inet_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb); /* From syncookies.c */ int __cookie_v4_check(const struct iphdr *iph, const struct tcphdr *th, u32 cookie); -struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb, - struct ip_options *opt); +struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb); #ifdef CONFIG_SYN_COOKIES /* Syncookies use a monotonic timer which increments every 60 seconds. @@ -1674,7 +1673,7 @@ static inline struct ip_options_rcu *tcp_v4_save_options(struct sk_buff *skb) const struct ip_options *opt = &TCP_SKB_CB(skb)->header.h4.opt; struct ip_options_rcu *dopt = NULL; - if (opt && opt->optlen) { + if (opt->optlen) { int opt_size = sizeof(*dopt) + opt->optlen; dopt = kmalloc(opt_size, GFP_ATOMIC); diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index c68d0a1a468e..d346303fac77 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -255,9 +255,9 @@ bool cookie_check_timestamp(struct tcp_options_received *tcp_opt, } EXPORT_SYMBOL(cookie_check_timestamp); -struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb, - struct ip_options *opt) +struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb) { + struct ip_options *opt = &TCP_SKB_CB(skb)->header.h4.opt; struct tcp_options_received tcp_opt; struct inet_request_sock *ireq; struct tcp_request_sock *treq; @@ -336,7 +336,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb, flowi4_init_output(&fl4, sk->sk_bound_dev_if, ireq->ir_mark, RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE, IPPROTO_TCP, inet_sk_flowi_flags(sk), - (opt && opt->srr) ? opt->faddr : ireq->ir_rmt_addr, + opt->srr ? opt->faddr : ireq->ir_rmt_addr, ireq->ir_loc_addr, th->source, th->dest); security_req_classify_flow(req, flowi4_to_flowi(&fl4)); rt = ip_route_output_key(sock_net(sk), &fl4); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 6a2a7d659a7a..94d1a7757ff7 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1408,7 +1408,7 @@ static struct sock *tcp_v4_hnd_req(struct sock *sk, struct sk_buff *skb) #ifdef CONFIG_SYN_COOKIES if (!th->syn) - sk = cookie_v4_check(sk, skb, &TCP_SKB_CB(skb)->header.h4.opt); + sk = cookie_v4_check(sk, skb); #endif return sk; } |