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authorEric Dumazet <edumazet@google.com>2015-09-25 07:39:19 -0700
committerDavid S. Miller <davem@davemloft.net>2015-09-25 13:00:38 -0700
commit5d062de7f8ea1ca7c635957ff1144fba815ba34c (patch)
tree913926fe8c4d4d3594a4a8558aa3ac6feb80ded6 /include
parent6ac705b1805863b1899e85f641bb265f9e6e9d99 (diff)
tcp: constify tcp_make_synack() socket argument
listener socket is not locked when tcp_make_synack() is called. We better make sure no field is written. There is one exception : Since SYNACK packets are attached to the listener at this moment (or SYN_RECV child in case of Fast Open), sock_wmalloc() needs to update sk->sk_wmem_alloc, but this is done using atomic operations so this is safe. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/tcp.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 45bc3c63c3fd..19f23590baa0 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -461,7 +461,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
int tcp_connect(struct sock *sk);
-struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
+struct sk_buff *tcp_make_synack(const struct sock *sk, struct dst_entry *dst,
struct request_sock *req,
struct tcp_fastopen_cookie *foc);
int tcp_disconnect(struct sock *sk, int flags);