[PATCH 04/10] netfilter: xt_LOG: add net namespace support for xt_LOG
From: Gao feng <hidden>
Date: 2013-02-07 07:49:44
Also in:
netfilter-devel
Subsystem:
netfilter, networking [general], the rest · Maintainers:
Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add pernet_operations for xt_LOG, in pernet_ops, we call nf_log_set/unset to set/unset nf_loggers of per net. Because the syslog ns has not been implemented, we don't want the container DOS the host's syslog. so only enable ebt_log in init_net and wait for syslog ns. Signed-off-by: Gao feng <redacted> --- net/netfilter/xt_LOG.c | 41 ++++++++++++++++++++++++++++++++++++++--- 1 file changed, 38 insertions(+), 3 deletions(-)
diff --git a/net/netfilter/xt_LOG.c b/net/netfilter/xt_LOG.c
index fa40096..f49cac4 100644
--- a/net/netfilter/xt_LOG.c
+++ b/net/netfilter/xt_LOG.c@@ -474,7 +474,13 @@ ipt_log_packet(u_int8_t pf, const struct nf_loginfo *loginfo, const char *prefix) { - struct sbuff *m = sb_open(); + struct sbuff *m; + struct net *net = dev_net((in != NULL) ? in : out); + + if (!net_eq(net, &init_net)) + return; + + m = sb_open(); if (!loginfo) loginfo = &default_loginfo;
@@ -798,7 +804,13 @@ ip6t_log_packet(u_int8_t pf, const struct nf_loginfo *loginfo, const char *prefix) { - struct sbuff *m = sb_open(); + struct sbuff *m; + struct net *net = dev_net((in != NULL) ? in : out); + + if (!net_eq(net, &init_net)) + return; + + m = sb_open(); if (!loginfo) loginfo = &default_loginfo;
@@ -893,6 +905,28 @@ static struct nf_logger ip6t_log_logger __read_mostly = { }; #endif +static int __net_init log_net_init(struct net *net) +{ + nf_log_set(net, NFPROTO_IPV4, &ipt_log_logger); +#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) + nf_log_set(net, NFPROTO_IPV6, &ip6t_log_logger); +#endif + return 0; +} + +static void __net_exit log_net_exit(struct net *net) +{ + nf_log_unset(net, &ipt_log_logger); +#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) + nf_log_unset(net, &ip6t_log_logger); +#endif +} + +static struct pernet_operations log_net_ops = { + .init = log_net_init, + .exit = log_net_exit, +}; + static int __init log_tg_init(void) { int ret;
@@ -905,11 +939,12 @@ static int __init log_tg_init(void) #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) nf_log_register(NFPROTO_IPV6, &ip6t_log_logger); #endif - return 0; + return register_pernet_subsys(&log_net_ops); } static void __exit log_tg_exit(void) { + unregister_pernet_subsys(&log_net_ops); nf_log_unregister(&ipt_log_logger); #if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) nf_log_unregister(&ip6t_log_logger);
--
1.7.11.7