diff options
| -rw-r--r-- | include/net/netns/conntrack.h | 12 | ||||
| -rw-r--r-- | net/netfilter/nf_conntrack_proto.c | 2 | ||||
| -rw-r--r-- | net/netfilter/nf_conntrack_proto_udp.c | 100 |
3 files changed, 103 insertions, 11 deletions
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h index 680d799ece8b..7bd14ab8ce1c 100644 --- a/include/net/netns/conntrack.h +++ b/include/net/netns/conntrack.h @@ -34,9 +34,21 @@ struct nf_tcp_net { unsigned int tcp_max_retrans; }; +enum udp_conntrack { + UDP_CT_UNREPLIED, + UDP_CT_REPLIED, + UDP_CT_MAX +}; + +struct nf_udp_net { + struct nf_proto_net pn; + unsigned int timeouts[UDP_CT_MAX]; +}; + struct nf_ip_net { struct nf_generic_net generic; struct nf_tcp_net tcp; + struct nf_udp_net udp; #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) struct ctl_table_header *ctl_table_header; struct ctl_table *ctl_table; diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 8a71e8bb0d6c..9c6aee51dea2 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -305,6 +305,8 @@ static struct nf_proto_net *nf_ct_l4proto_net(struct net *net, switch (l4proto->l4proto) { case IPPROTO_TCP: return (struct nf_proto_net *)&net->ct.nf_ct_proto.tcp; + case IPPROTO_UDP: + return (struct nf_proto_net *)&net->ct.nf_ct_proto.udp; case 255: /* l4proto_generic */ return (struct nf_proto_net *)&net->ct.nf_ct_proto.generic; default: diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c index 7259a6bdeb49..f56c8905ddfb 100644 --- a/net/netfilter/nf_conntrack_proto_udp.c +++ b/net/netfilter/nf_conntrack_proto_udp.c @@ -25,17 +25,16 @@ #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> #include <net/netfilter/ipv6/nf_conntrack_ipv6.h> -enum udp_conntrack { - UDP_CT_UNREPLIED, - UDP_CT_REPLIED, - UDP_CT_MAX -}; - static unsigned int udp_timeouts[UDP_CT_MAX] = { [UDP_CT_UNREPLIED] = 30*HZ, [UDP_CT_REPLIED] = 180*HZ, }; +static inline struct nf_udp_net *udp_pernet(struct net *net) +{ + return &net->ct.nf_ct_proto.udp; +} + static bool udp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, struct nf_conntrack_tuple *tuple) @@ -73,7 +72,7 @@ static int udp_print_tuple(struct seq_file *s, static unsigned int *udp_get_timeouts(struct net *net) { - return udp_timeouts; + return udp_pernet(net)->timeouts; } /* Returns verdict for packet, and may modify conntracktype */ @@ -205,14 +204,12 @@ static struct ctl_table_header *udp_sysctl_header; static struct ctl_table udp_sysctl_table[] = { { .procname = "nf_conntrack_udp_timeout", - .data = &udp_timeouts[UDP_CT_UNREPLIED], .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "nf_conntrack_udp_timeout_stream", - .data = &udp_timeouts[UDP_CT_REPLIED], .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, @@ -223,14 +220,12 @@ static struct ctl_table udp_sysctl_table[] = { static struct ctl_table udp_compat_sysctl_table[] = { { .procname = "ip_conntrack_udp_timeout", - .data = &udp_timeouts[UDP_CT_UNREPLIED], .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "ip_conntrack_udp_timeout_stream", - .data = &udp_timeouts[UDP_CT_REPLIED], .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, @@ -240,6 +235,87 @@ static struct ctl_table udp_compat_sysctl_table[] = { #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ #endif /* CONFIG_SYSCTL */ +static int udp_kmemdup_sysctl_table(struct nf_proto_net *pn) +{ +#ifdef CONFIG_SYSCTL + struct nf_udp_net *un = (struct nf_udp_net *)pn; + if (pn->ctl_table) + return 0; + pn->ctl_table = kmemdup(udp_sysctl_table, + sizeof(udp_sysctl_table), + GFP_KERNEL); + if (!pn->ctl_table) + return -ENOMEM; + pn->ctl_table[0].data = &un->timeouts[UDP_CT_UNREPLIED]; + pn->ctl_table[1].data = &un->timeouts[UDP_CT_REPLIED]; +#endif + return 0; +} + +static int udp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn) +{ +#ifdef CONFIG_SYSCTL +#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT + struct nf_udp_net *un = (struct nf_udp_net *)pn; + pn->ctl_compat_table = kmemdup(udp_compat_sysctl_table, + sizeof(udp_compat_sysctl_table), + GFP_KERNEL); + if (!pn->ctl_compat_table) + return -ENOMEM; + + pn->ctl_compat_table[0].data = &un->timeouts[UDP_CT_UNREPLIED]; + pn->ctl_compat_table[1].data = &un->timeouts[UDP_CT_REPLIED]; +#endif +#endif + return 0; +} + +static void udp_init_net_data(struct nf_udp_net *un) +{ + int i; +#ifdef CONFIG_SYSCTL + if (!un->pn.ctl_table) { +#else + if (!un->pn.user++) { +#endif + for (i = 0; i < UDP_CT_MAX; i++) + un->timeouts[i] = udp_timeouts[i]; + } +} + +static int udpv4_init_net(struct net *net) +{ + int ret; + struct nf_udp_net *un = udp_pernet(net); + struct nf_proto_net *pn = (struct nf_proto_net *)un; + + udp_init_net_data(un); + + ret = udp_kmemdup_compat_sysctl_table(pn); + if (ret < 0) + return ret; + + ret = udp_kmemdup_sysctl_table(pn); +#ifdef CONFIG_SYSCTL +#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT + if (ret < 0) { + kfree(pn->ctl_compat_table); + pn->ctl_compat_table = NULL; + } +#endif +#endif + return ret; +} + +static int udpv6_init_net(struct net *net) +{ + struct nf_udp_net *un = udp_pernet(net); + struct nf_proto_net *pn = (struct nf_proto_net *)un; + + udp_init_net_data(un); + return udp_kmemdup_sysctl_table(pn); +} + struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly = { .l3proto = PF_INET, @@ -275,6 +351,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly = .ctl_compat_table = udp_compat_sysctl_table, #endif #endif + .init_net = udpv4_init_net, }; EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4); @@ -310,5 +387,6 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly = .ctl_table_header = &udp_sysctl_header, .ctl_table = udp_sysctl_table, #endif + .init_net = udpv6_init_net, }; EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6); |