From: Tim Froidcoeur tim.froidcoeur@tessares.net
commit 62ffc589abb176821662efc4525ee4ac0b9c3894 upstream.
Refactor the fastreuse update code in inet_csk_get_port into a small helper function that can be called from other places.
Acked-by: Matthieu Baerts matthieu.baerts@tessares.net Signed-off-by: Tim Froidcoeur tim.froidcoeur@tessares.net Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Tim Froidcoeur tim.froidcoeur@tessares.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/net/inet_connection_sock.h | 4 ++++ net/ipv4/inet_connection_sock.c | 37 +++++++++++++++++++++++++------------ 2 files changed, 29 insertions(+), 12 deletions(-)
--- a/include/net/inet_connection_sock.h +++ b/include/net/inet_connection_sock.h @@ -319,5 +319,9 @@ int inet_csk_compat_getsockopt(struct so int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen);
+/* update the fast reuse flag when adding a socket */ +void inet_csk_update_fastreuse(struct inet_bind_bucket *tb, + struct sock *sk); + struct dst_entry *inet_csk_update_pmtu(struct sock *sk, u32 mtu); #endif /* _INET_CONNECTION_SOCK_H */ --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -89,6 +89,28 @@ int inet_csk_bind_conflict(const struct } EXPORT_SYMBOL_GPL(inet_csk_bind_conflict);
+void inet_csk_update_fastreuse(struct inet_bind_bucket *tb, + struct sock *sk) +{ + kuid_t uid = sock_i_uid(sk); + bool reuse = sk->sk_reuse && sk->sk_state != TCP_LISTEN; + + if (!hlist_empty(&tb->owners)) { + if (!reuse) + tb->fastreuse = 0; + if (!sk->sk_reuseport || !uid_eq(tb->fastuid, uid)) + tb->fastreuseport = 0; + } else { + tb->fastreuse = reuse; + if (sk->sk_reuseport) { + tb->fastreuseport = 1; + tb->fastuid = uid; + } else { + tb->fastreuseport = 0; + } + } +} + /* Obtain a reference to a local port for the given sock, * if snum is zero it means select any available local port. * We try to allocate an odd port (and leave even ports for connect()) @@ -218,19 +240,10 @@ tb_found: } goto fail_unlock; } - if (!reuse) - tb->fastreuse = 0; - if (!sk->sk_reuseport || !uid_eq(tb->fastuid, uid)) - tb->fastreuseport = 0; - } else { - tb->fastreuse = reuse; - if (sk->sk_reuseport) { - tb->fastreuseport = 1; - tb->fastuid = uid; - } else { - tb->fastreuseport = 0; - } } + + inet_csk_update_fastreuse(tb, sk); + success: if (!inet_csk(sk)->icsk_bind_hash) inet_bind_hash(sk, tb, port);