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authorGeert Uytterhoeven <geert@linux-m68k.org>2020-01-30 10:45:26 +0100
committerDavid S. Miller <davem@davemloft.net>2020-01-30 10:55:54 +0100
commit31484d56ca9511e62c08626db338d2aaafb3aa3f (patch)
treef5c4ca9e06fff955b7b60209172bd02d2df8c562
parentnet: drop_monitor: Use kstrdup (diff)
downloadlinux-dev-31484d56ca9511e62c08626db338d2aaafb3aa3f.tar.xz
linux-dev-31484d56ca9511e62c08626db338d2aaafb3aa3f.zip
mptcp: Fix undefined mptcp_handle_ipv6_mapped for modular IPV6
If CONFIG_MPTCP=y, CONFIG_MPTCP_IPV6=n, and CONFIG_IPV6=m: ERROR: "mptcp_handle_ipv6_mapped" [net/ipv6/ipv6.ko] undefined! This does not happen if CONFIG_MPTCP_IPV6=y, as CONFIG_MPTCP_IPV6 selects CONFIG_IPV6, and thus forces CONFIG_IPV6 builtin. As exporting a symbol for an empty function would be a bit wasteful, fix this by providing a dummy version of mptcp_handle_ipv6_mapped() for the CONFIG_MPTCP_IPV6=n case. Rename mptcp_handle_ipv6_mapped() to mptcpv6_handle_mapped(), to make it clear this is a pure-IPV6 function, just like mptcpv6_init(). Fixes: cec37a6e41aae7bf ("mptcp: Handle MP_CAPABLE options for outgoing connections") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/mptcp.h9
-rw-r--r--net/ipv6/tcp_ipv6.c6
-rw-r--r--net/mptcp/subflow.c6
3 files changed, 9 insertions, 12 deletions
diff --git a/include/net/mptcp.h b/include/net/mptcp.h
index 27627e2d1bc2..c971d25431ea 100644
--- a/include/net/mptcp.h
+++ b/include/net/mptcp.h
@@ -174,15 +174,12 @@ static inline bool mptcp_skb_can_collapse(const struct sk_buff *to,
#endif /* CONFIG_MPTCP */
-void mptcp_handle_ipv6_mapped(struct sock *sk, bool mapped);
-
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
int mptcpv6_init(void);
+void mptcpv6_handle_mapped(struct sock *sk, bool mapped);
#elif IS_ENABLED(CONFIG_IPV6)
-static inline int mptcpv6_init(void)
-{
- return 0;
-}
+static inline int mptcpv6_init(void) { return 0; }
+static inline void mptcpv6_handle_mapped(struct sock *sk, bool mapped) { }
#endif
#endif /* __NET_MPTCP_H */
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 33a578a3eb3a..eaf09e6b7844 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -239,7 +239,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
icsk->icsk_af_ops = &ipv6_mapped;
if (sk_is_mptcp(sk))
- mptcp_handle_ipv6_mapped(sk, true);
+ mptcpv6_handle_mapped(sk, true);
sk->sk_backlog_rcv = tcp_v4_do_rcv;
#ifdef CONFIG_TCP_MD5SIG
tp->af_specific = &tcp_sock_ipv6_mapped_specific;
@@ -251,7 +251,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
icsk->icsk_ext_hdr_len = exthdrlen;
icsk->icsk_af_ops = &ipv6_specific;
if (sk_is_mptcp(sk))
- mptcp_handle_ipv6_mapped(sk, false);
+ mptcpv6_handle_mapped(sk, false);
sk->sk_backlog_rcv = tcp_v6_do_rcv;
#ifdef CONFIG_TCP_MD5SIG
tp->af_specific = &tcp_sock_ipv6_specific;
@@ -1208,7 +1208,7 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
inet_csk(newsk)->icsk_af_ops = &ipv6_mapped;
if (sk_is_mptcp(newsk))
- mptcp_handle_ipv6_mapped(newsk, true);
+ mptcpv6_handle_mapped(newsk, true);
newsk->sk_backlog_rcv = tcp_v4_do_rcv;
#ifdef CONFIG_TCP_MD5SIG
newtp->af_specific = &tcp_sock_ipv6_mapped_specific;
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index c90c0e6ffb82..65122edf60aa 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -585,9 +585,9 @@ subflow_default_af_ops(struct sock *sk)
return &subflow_specific;
}
-void mptcp_handle_ipv6_mapped(struct sock *sk, bool mapped)
-{
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+void mptcpv6_handle_mapped(struct sock *sk, bool mapped)
+{
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_connection_sock_af_ops *target;
@@ -602,8 +602,8 @@ void mptcp_handle_ipv6_mapped(struct sock *sk, bool mapped)
subflow->icsk_af_ops = icsk->icsk_af_ops;
icsk->icsk_af_ops = target;
-#endif
}
+#endif
int mptcp_subflow_create_socket(struct sock *sk, struct socket **new_sock)
{