diff options
author | Eric Dumazet <edumazet@google.com> | 2015-12-07 16:53:17 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2015-12-07 22:07:33 (GMT) |
commit | bd5eb35f16a9c55afcf5eb1c920cbbaf09747369 (patch) | |
tree | 04ee2f972b0b0a04efebdb79f14f391bec142170 /include/net/inet_sock.h | |
parent | 69ce6487dcd364245a3d26322fc8f4ffd1e8d947 (diff) | |
download | linux-bd5eb35f16a9c55afcf5eb1c920cbbaf09747369.tar.xz |
xfrm: take care of request sockets
TCP SYNACK messages might now be attached to request sockets.
XFRM needs to get back to a listener socket.
Adds new helpers that might be used elsewhere :
sk_to_full_sk() and sk_const_to_full_sk()
Note: We also need to add RCU protection for xfrm lookups,
now TCP/DCCP have lockless listener processing. This will
be addressed in separate patches.
Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_sock.h')
-rw-r--r-- | include/net/inet_sock.h | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index 2134e6d..625bdf9 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -210,18 +210,37 @@ struct inet_sock { #define IP_CMSG_ORIGDSTADDR BIT(6) #define IP_CMSG_CHECKSUM BIT(7) -/* SYNACK messages might be attached to request sockets. +/** + * sk_to_full_sk - Access to a full socket + * @sk: pointer to a socket + * + * SYNACK messages might be attached to request sockets. * Some places want to reach the listener in this case. */ -static inline struct sock *skb_to_full_sk(const struct sk_buff *skb) +static inline struct sock *sk_to_full_sk(struct sock *sk) { - struct sock *sk = skb->sk; - +#ifdef CONFIG_INET if (sk && sk->sk_state == TCP_NEW_SYN_RECV) sk = inet_reqsk(sk)->rsk_listener; +#endif + return sk; +} + +/* sk_to_full_sk() variant with a const argument */ +static inline const struct sock *sk_const_to_full_sk(const struct sock *sk) +{ +#ifdef CONFIG_INET + if (sk && sk->sk_state == TCP_NEW_SYN_RECV) + sk = ((const struct request_sock *)sk)->rsk_listener; +#endif return sk; } +static inline struct sock *skb_to_full_sk(const struct sk_buff *skb) +{ + return sk_to_full_sk(skb->sk); +} + static inline struct inet_sock *inet_sk(const struct sock *sk) { return (struct inet_sock *)sk; |