[PATCH 10/18] ipvs: fix ip_vs_try_bind_dest to rebind app and transmitter
From: Simon Horman <horms@verge.net.au>
Date: 2012-05-02 06:22:49
Also in:
lvs-devel, netfilter-devel
Subsystem:
ipvs, netfilter, networking [general], the rest · Maintainers:
Simon Horman, Julian Anastasov, Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Julian Anastasov <ja@ssi.bg> Initially, when the synced connection is created we use the forwarding method provided by master but once we bind to destination it can be changed. As result, we must update the application and the transmitter. As ip_vs_try_bind_dest is called always for connections that require dest binding, there is no need to validate the cp and dest pointers. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au> --- net/netfilter/ipvs/ip_vs_conn.c | 33 ++++++++++++++++++++++++++------- 1 file changed, 26 insertions(+), 7 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 7647f3b..9d237d7 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c@@ -612,14 +612,33 @@ struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp) { struct ip_vs_dest *dest; - if ((cp) && (!cp->dest)) { - dest = ip_vs_find_dest(ip_vs_conn_net(cp), cp->af, &cp->daddr, - cp->dport, &cp->vaddr, cp->vport, - cp->protocol, cp->fwmark, cp->flags); + dest = ip_vs_find_dest(ip_vs_conn_net(cp), cp->af, &cp->daddr, + cp->dport, &cp->vaddr, cp->vport, + cp->protocol, cp->fwmark, cp->flags); + if (dest) { + struct ip_vs_proto_data *pd; + + /* Applications work depending on the forwarding method + * but better to reassign them always when binding dest */ + if (cp->app) + ip_vs_unbind_app(cp); + ip_vs_bind_dest(cp, dest); - return dest; - } else - return NULL; + + /* Update its packet transmitter */ + cp->packet_xmit = NULL; +#ifdef CONFIG_IP_VS_IPV6 + if (cp->af == AF_INET6) + ip_vs_bind_xmit_v6(cp); + else +#endif + ip_vs_bind_xmit(cp); + + pd = ip_vs_proto_data_get(ip_vs_conn_net(cp), cp->protocol); + if (pd && atomic_read(&pd->appcnt)) + ip_vs_bind_app(cp, pd->pp); + } + return dest; }
--
1.7.10