diff options
40 files changed, 514 insertions, 221 deletions
diff --git a/include/linux/netfilter_bridge/ebtables.h b/include/linux/netfilter_bridge/ebtables.h index d45e29c..e40ddb9 100644 --- a/include/linux/netfilter_bridge/ebtables.h +++ b/include/linux/netfilter_bridge/ebtables.h @@ -300,7 +300,8 @@ struct ebt_table #define EBT_ALIGN(s) (((s) + (__alignof__(struct ebt_replace)-1)) & \ ~(__alignof__(struct ebt_replace)-1)) -extern int ebt_register_table(struct ebt_table *table); +extern struct ebt_table *ebt_register_table(struct net *net, + struct ebt_table *table); extern void ebt_unregister_table(struct ebt_table *table); extern unsigned int ebt_do_table(unsigned int hook, struct sk_buff *skb, const struct net_device *in, const struct net_device *out, diff --git a/include/linux/netfilter_ipv4/ipt_policy.h b/include/linux/netfilter_ipv4/ipt_policy.h index b9478a2..1037fb2 100644 --- a/include/linux/netfilter_ipv4/ipt_policy.h +++ b/include/linux/netfilter_ipv4/ipt_policy.h @@ -1,6 +1,8 @@ #ifndef _IPT_POLICY_H #define _IPT_POLICY_H +#include <linux/netfilter/xt_policy.h> + #define IPT_POLICY_MAX_ELEM XT_POLICY_MAX_ELEM /* ipt_policy_flags */ diff --git a/include/linux/netfilter_ipv6/ip6t_policy.h b/include/linux/netfilter_ipv6/ip6t_policy.h index 6bab316..b1c449d 100644 --- a/include/linux/netfilter_ipv6/ip6t_policy.h +++ b/include/linux/netfilter_ipv6/ip6t_policy.h @@ -1,6 +1,8 @@ #ifndef _IP6T_POLICY_H #define _IP6T_POLICY_H +#include <linux/netfilter/xt_policy.h> + #define IP6T_POLICY_MAX_ELEM XT_POLICY_MAX_ELEM /* ip6t_policy_flags */ diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h index b76a868..2e0c536 100644 --- a/include/net/netfilter/nf_conntrack.h +++ b/include/net/netfilter/nf_conntrack.h @@ -199,7 +199,7 @@ __nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple); extern void nf_conntrack_hash_insert(struct nf_conn *ct); -extern void nf_conntrack_flush(struct net *net); +extern void nf_conntrack_flush(struct net *net, u32 pid, int report); extern bool nf_ct_get_tuplepr(const struct sk_buff *skb, unsigned int nhoff, u_int16_t l3num, @@ -298,5 +298,8 @@ do { \ local_bh_enable(); \ } while (0) +#define MODULE_ALIAS_NFCT_HELPER(helper) \ + MODULE_ALIAS("nfct-helper-" helper) + #endif /* __KERNEL__ */ #endif /* _NF_CONNTRACK_H */ diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h index 1285ff2..0ff0dc6 100644 --- a/include/net/netfilter/nf_conntrack_ecache.h +++ b/include/net/netfilter/nf_conntrack_ecache.h @@ -17,6 +17,13 @@ struct nf_conntrack_ecache { unsigned int events; }; +/* This structure is passed to event handler */ +struct nf_ct_event { + struct nf_conn *ct; + u32 pid; + int report; +}; + extern struct atomic_notifier_head nf_conntrack_chain; extern int nf_conntrack_register_notifier(struct notifier_block *nb); extern int nf_conntrack_unregister_notifier(struct notifier_block *nb); @@ -39,22 +46,56 @@ nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct) local_bh_enable(); } -static inline void nf_conntrack_event(enum ip_conntrack_events event, - struct nf_conn *ct) +static inline void +nf_conntrack_event_report(enum ip_conntrack_events event, + struct nf_conn *ct, + u32 pid, + int report) { + struct nf_ct_event item = { + .ct = ct, + .pid = pid, + .report = report + }; if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) - atomic_notifier_call_chain(&nf_conntrack_chain, event, ct); + atomic_notifier_call_chain(&nf_conntrack_chain, event, &item); } +static inline void +nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct) +{ + nf_conntrack_event_report(event, ct, 0, 0); +} + +struct nf_exp_event { + struct nf_conntrack_expect *exp; + u32 pid; + int report; +}; + extern struct atomic_notifier_head nf_ct_expect_chain; extern int nf_ct_expect_register_notifier(struct notifier_block *nb); extern int nf_ct_expect_unregister_notifier(struct notifier_block *nb); static inline void +nf_ct_expect_event_report(enum ip_conntrack_expect_events event, + struct nf_conntrack_expect *exp, + u32 pid, + int report) +{ + struct nf_exp_event item = { + .exp = exp, + .pid = pid, + .report = report + }; + atomic_notifier_call_chain(&nf_ct_expect_chain, event, &item); +} + +static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event, struct nf_conntrack_expect *exp) { - atomic_notifier_call_chain(&nf_ct_expect_chain, event, exp); + nf_ct_expect_event_report(event, exp, 0, 0); } extern int nf_conntrack_ecache_init(struct net *net); @@ -66,9 +107,17 @@ static inline void nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct) {} static inline void nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct) {} +static inline void nf_conntrack_event_report(enum ip_conntrack_events event, + struct nf_conn *ct, + u32 pid, + int report) {} static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {} static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event, struct nf_conntrack_expect *exp) {} +static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e, + struct nf_conntrack_expect *exp, + u32 pid, + int report) {} static inline void nf_ct_event_cache_flush(struct net *net) {} static inline int nf_conntrack_ecache_init(struct net *net) diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h index 37a7fc1..ab17a15 100644 --- a/include/net/netfilter/nf_conntrack_expect.h +++ b/include/net/netfilter/nf_conntrack_expect.h @@ -100,6 +100,8 @@ void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t, u_int8_t, const __be16 *, const __be16 *); void nf_ct_expect_put(struct nf_conntrack_expect *exp); int nf_ct_expect_related(struct nf_conntrack_expect *expect); +int nf_ct_expect_related_report(struct nf_conntrack_expect *expect, + u32 pid, int report); #endif /*_NF_CONNTRACK_EXPECT_H*/ diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index f8060ab..66d65a7 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -39,9 +39,6 @@ struct nf_conntrack_helper }; extern struct nf_conntrack_helper * -__nf_ct_helper_find(const struct nf_conntrack_tuple *tuple); - -extern struct nf_conntrack_helper * __nf_conntrack_helper_find_byname(const char *name); extern int nf_conntrack_helper_register(struct nf_conntrack_helper *); @@ -49,6 +46,8 @@ extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *); extern struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct, gfp_t gfp); +extern int __nf_ct_try_assign_helper(struct nf_conn *ct, gfp_t flags); + static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct) { return nf_ct_ext_find(ct, NF_CT_EXT_HELPER); diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h index 7f2f43c..debdaf7 100644 --- a/include/net/netfilter/nf_conntrack_l4proto.h +++ b/include/net/netfilter/nf_conntrack_l4proto.h @@ -129,7 +129,7 @@ extern const struct nla_policy nf_ct_port_nla_policy[]; && net_ratelimit()) #endif #else -#define LOG_INVALID(net, proto) 0 +static inline int LOG_INVALID(struct net *net, int proto) { return 0; } #endif /* CONFIG_SYSCTL */ #endif /*_NF_CONNTRACK_PROTOCOL_H*/ diff --git a/include/net/netfilter/nfnetlink_log.h b/include/net/netfilter/nfnetlink_log.h new file mode 100644 index 0000000..b0569ff --- /dev/null +++ b/include/net/netfilter/nfnetlink_log.h @@ -0,0 +1,14 @@ +#ifndef _KER_NFNETLINK_LOG_H +#define _KER_NFNETLINK_LOG_H + +void +nfulnl_log_packet(u_int8_t pf, + unsigned int hooknum, + const struct sk_buff *skb, + const struct net_device *in, + const struct net_device *out, + const struct nf_loginfo *li_user, + const char *prefix); + +#endif /* _KER_NFNETLINK_LOG_H */ + diff --git a/include/net/netns/x_tables.h b/include/net/netns/x_tables.h index b809397..9554a64 100644 --- a/include/net/netns/x_tables.h +++ b/include/net/netns/x_tables.h @@ -4,7 +4,12 @@ #include <linux/list.h> #include <linux/netfilter.h> +struct ebt_table; + struct netns_xt { struct list_head tables[NFPROTO_NUMPROTO]; + struct ebt_table *broute_table; + struct ebt_table *frame_filter; + struct ebt_table *frame_nat; }; #endif diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 274194b..a65e43a 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -369,7 +369,7 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb) if (err != -EHOSTUNREACH || !in_dev || IN_DEV_FORWARD(in_dev)) goto free_skb; - if (!ip_route_output_key(&init_net, &rt, &fl)) { + if (!ip_route_output_key(dev_net(dev), &rt, &fl)) { /* - Bridged-and-DNAT'ed traffic doesn't * require ip_forwarding. */ if (((struct dst_entry *)rt)->dev == dev) { diff --git a/net/bridge/netfilter/ebtable_broute.c b/net/bridge/netfilter/ebtable_broute.c index 246626b..8604dfc 100644 --- a/net/bridge/netfilter/ebtable_broute.c +++ b/net/bridge/netfilter/ebtable_broute.c @@ -56,29 +56,47 @@ static int ebt_broute(struct sk_buff *skb) int ret; ret = ebt_do_table(NF_BR_BROUTING, skb, skb->dev, NULL, - &broute_table); + dev_net(skb->dev)->xt.broute_table); if (ret == NF_DROP) return 1; /* route it */ return 0; /* bridge it */ } +static int __net_init broute_net_init(struct net *net) +{ + net->xt.broute_table = ebt_register_table(net, &broute_table); + if (IS_ERR(net->xt.broute_table)) + return PTR_ERR(net->xt.broute_table); + return 0; +} + +static void __net_exit broute_net_exit(struct net *net) +{ + ebt_unregister_table(net->xt.broute_table); +} + +static struct pernet_operations broute_net_ops = { + .init = broute_net_init, + .exit = broute_net_exit, +}; + static int __init ebtable_broute_init(void) { int ret; - ret = ebt_register_table(&broute_table); + ret = register_pernet_subsys(&broute_net_ops); if (ret < 0) return ret; /* see br_input.c */ rcu_assign_pointer(br_should_route_hook, ebt_broute); - return ret; + return 0; } static void __exit ebtable_broute_fini(void) { rcu_assign_pointer(br_should_route_hook, NULL); synchronize_net(); - ebt_unregister_table(&broute_table); + unregister_pernet_subsys(&broute_net_ops); } module_init(ebtable_broute_init); diff --git a/net/bridge/netfilter/ebtable_filter.c b/net/bridge/netfilter/ebtable_filter.c index 1a58af5..2b2e804 100644 --- a/net/bridge/netfilter/ebtable_filter.c +++ b/net/bridge/netfilter/ebtable_filter.c @@ -61,29 +61,36 @@ static struct ebt_table frame_filter = }; static unsigned int -ebt_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, +ebt_in_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ebt_do_table(hook, skb, in, out, &frame_filter); + return ebt_do_table(hook, skb, in, out, dev_net(in)->xt.frame_filter); +} + +static unsigned int +ebt_out_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, + const struct net_device *out, int (*okfn)(struct sk_buff *)) +{ + return ebt_do_table(hook, skb, in, out, dev_net(out)->xt.frame_filter); } static struct nf_hook_ops ebt_ops_filter[] __read_mostly = { { - .hook = ebt_hook, + .hook = ebt_in_hook, .owner = THIS_MODULE, .pf = PF_BRIDGE, .hooknum = NF_BR_LOCAL_IN, .priority = NF_BR_PRI_FILTER_BRIDGED, }, { - .hook = ebt_hook, + .hook = ebt_in_hook, .owner = THIS_MODULE, .pf = PF_BRIDGE, .hooknum = NF_BR_FORWARD, .priority = NF_BR_PRI_FILTER_BRIDGED, }, { - .hook = ebt_hook, + .hook = ebt_out_hook, .owner = THIS_MODULE, .pf = PF_BRIDGE, .hooknum = NF_BR_LOCAL_OUT, @@ -91,23 +98,41 @@ static struct nf_hook_ops ebt_ops_filter[] __read_mostly = { }, }; +static int __net_init frame_filter_net_init(struct net *net) +{ + net->xt.frame_filter = ebt_register_table(net, &frame_filter); + if (IS_ERR(net->xt.frame_filter)) + return PTR_ERR(net->xt.frame_filter); + return 0; +} + +static void __net_exit frame_filter_net_exit(struct net *net) +{ + ebt_unregister_table(net->xt.frame_filter); +} + +static struct pernet_operations frame_filter_net_ops = { + .init = frame_filter_net_init, + .exit = frame_filter_net_exit, +}; + static int __init ebtable_filter_init(void) { int ret; - ret = ebt_register_table(&frame_filter); + ret = register_pernet_subsys(&frame_filter_net_ops); if (ret < 0) return ret; ret = nf_register_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter)); if (ret < 0) - ebt_unregister_table(&frame_filter); + unregister_pernet_subsys(&frame_filter_net_ops); return ret; } static void __exit ebtable_filter_fini(void) { nf_unregister_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter)); - ebt_unregister_table(&frame_filter); + unregister_pernet_subsys(&frame_filter_net_ops); } module_init(ebtable_filter_init); diff --git a/net/bridge/netfilter/ebtable_nat.c b/net/bridge/netfilter/ebtable_nat.c index f60c1e7..3fe1ae8 100644 --- a/net/bridge/netfilter/ebtable_nat.c +++ b/net/bridge/netfilter/ebtable_nat.c @@ -61,36 +61,36 @@ static struct ebt_table frame_nat = }; static unsigned int -ebt_nat_dst(unsigned int hook, struct sk_buff *skb, const struct net_device *in +ebt_nat_in(unsigned int hook, struct sk_buff *skb, const struct net_device *in , const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ebt_do_table(hook, skb, in, out, &frame_nat); + return ebt_do_table(hook, skb, in, out, dev_net(in)->xt.frame_nat); } static unsigned int -ebt_nat_src(unsigned int hook, struct sk_buff *skb, const struct net_device *in +ebt_nat_out(unsigned int hook, struct sk_buff *skb, const struct net_device *in , const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ebt_do_table(hook, skb, in, out, &frame_nat); + return ebt_do_table(hook, skb, in, out, dev_net(out)->xt.frame_nat); } static struct nf_hook_ops ebt_ops_nat[] __read_mostly = { { - .hook = ebt_nat_dst, + .hook = ebt_nat_out, .owner = THIS_MODULE, .pf = PF_BRIDGE, .hooknum = NF_BR_LOCAL_OUT, .priority = NF_BR_PRI_NAT_DST_OTHER, }, { - .hook = ebt_nat_src, + .hook = ebt_nat_out, .owner = THIS_MODULE, .pf = PF_BRIDGE, .hooknum = NF_BR_POST_ROUTING, .priority = NF_BR_PRI_NAT_SRC, }, { - .hook = ebt_nat_dst, + .hook = ebt_nat_in, .owner = THIS_MODULE, .pf = PF_BRIDGE, .hooknum = NF_BR_PRE_ROUTING, @@ -98,23 +98,41 @@ static struct nf_hook_ops ebt_ops_nat[] __read_mostly = { }, }; +static int __net_init frame_nat_net_init(struct net *net) +{ + net->xt.frame_nat = ebt_register_table(net, &frame_nat); + if (IS_ERR(net->xt.frame_nat)) + return PTR_ERR(net->xt.frame_nat); + return 0; +} + +static void __net_exit frame_nat_net_exit(struct net *net) +{ + ebt_unregister_table(net->xt.frame_nat); +} + +static struct pernet_operations frame_nat_net_ops = { + .init = frame_nat_net_init, + .exit = frame_nat_net_exit, +}; + static int __init ebtable_nat_init(void) { int ret; - ret = ebt_register_table(&frame_nat); + ret = register_pernet_subsys(&frame_nat_net_ops); if (ret < 0) return ret; ret = nf_register_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat)); if (ret < 0) - ebt_unregister_table(&frame_nat); + unregister_pernet_subsys(&frame_nat_net_ops); return ret; } static void __exit ebtable_nat_fini(void) { nf_unregister_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat)); - ebt_unregister_table(&frame_nat); + unregister_pernet_subsys(&frame_nat_net_ops); } module_init(ebtable_nat_init); diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 0fa208e..fa108c4 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -55,7 +55,6 @@ static DEFINE_MUTEX(ebt_mutex); -static LIST_HEAD(ebt_tables); static struct xt_target ebt_standard_target = { .name = "standard", @@ -315,9 +314,11 @@ find_inlist_lock(struct list_head *head, const char *name, const char *prefix, } static inline struct ebt_table * -find_table_lock(const char *name, int *error, struct mutex *mutex) +find_table_lock(struct net *net, const char *name, int *error, + struct mutex *mutex) { - return find_inlist_lock(&ebt_tables, name, "ebtable_", error, mutex); + return find_inlist_lock(&net->xt.tables[NFPROTO_BRIDGE], name, + "ebtable_", error, mutex); } static inline int @@ -944,7 +945,7 @@ static void get_counters(struct ebt_counter *oldcounters, } /* replace the table */ -static int do_replace(void __user *user, unsigned int len) +static int do_replace(struct net *net, void __user *user, unsigned int len) { int ret, i, countersize; struct ebt_table_info *newinfo; @@ -1016,7 +1017,7 @@ static int do_replace(void __user *user, unsigned int len) if (ret != 0) goto free_counterstmp; - t = find_table_lock(tmp.name, &ret, &ebt_mutex); + t = find_table_lock(net, tmp.name, &ret, &ebt_mutex); if (!t) { ret = -ENOENT; goto free_iterate; @@ -1097,7 +1098,7 @@ free_newinfo: return ret; } -int ebt_register_table(struct ebt_table *table) +struct ebt_table *ebt_register_table(struct net *net, struct ebt_table *table) { struct ebt_table_info *newinfo; struct ebt_table *t; @@ -1109,14 +1110,21 @@ int ebt_register_table(struct ebt_table *table) repl->entries_size == 0 || repl->counters || table->private) { BUGPRINT("Bad table data for ebt_register_table!!!\n"); - return -EINVAL; + return ERR_PTR(-EINVAL); + } + + /* Don't add one table to multiple lists. */ + table = kmemdup(table, sizeof(struct ebt_table), GFP_KERNEL); + if (!table) { + ret = -ENOMEM; + goto out; } countersize = COUNTER_OFFSET(repl->nentries) * nr_cpu_ids; newinfo = vmalloc(sizeof(*newinfo) + countersize); ret = -ENOMEM; if (!newinfo) - return -ENOMEM; + goto free_table; p = vmalloc(repl->entries_size); if (!p) @@ -1148,7 +1156,7 @@ int ebt_register_table(struct ebt_table *table) if (table->check && table->check(newinfo, table->valid_hooks)) { BUGPRINT("The table doesn't like its own initial data, lol\n"); - return -EINVAL; + return ERR_PTR(-EINVAL); } table->private = newinfo; @@ -1157,7 +1165,7 @@ int ebt_register_table(struct ebt_table *table) if (ret != 0) goto free_chainstack; - list_for_each_entry(t, &ebt_tables, list) { + list_for_each_entry(t, &net->xt.tables[NFPROTO_BRIDGE], list) { if (strcmp(t->name, table->name) == 0) { ret = -EEXIST; BUGPRINT("Table name already exists\n"); @@ -1170,9 +1178,9 @@ int ebt_register_table(struct ebt_table *table) ret = -ENOENT; goto free_unlock; } - list_add(&table->list, &ebt_tables); + list_add(&table->list, &net->xt.tables[NFPROTO_BRIDGE]); mutex_unlock(&ebt_mutex); - return 0; + return table; free_unlock: mutex_unlock(&ebt_mutex); free_chainstack: @@ -1184,7 +1192,10 @@ free_chainstack: vfree(newinfo->entries); free_newinfo: vfree(newinfo); - return ret; +free_table: + kfree(table); +out: + return ERR_PTR(ret); } void ebt_unregister_table(struct ebt_table *table) @@ -1198,6 +1209,10 @@ void ebt_unregister_table(struct ebt_table *table) mutex_lock(&ebt_mutex); list_del(&table->list); mutex_unlock(&ebt_mutex); + EBT_ENTRY_ITERATE(table->private->entries, table->private->entries_size, + ebt_cleanup_entry, NULL); + if (table->private->nentries) + module_put(table->me); vfree(table->private->entries); if (table->private->chainstack) { for_each_possible_cpu(i) @@ -1205,10 +1220,11 @@ void ebt_unregister_table(struct ebt_table *table) vfree(table->private->chainstack); } vfree(table->private); + kfree(table); } /* userspace just supplied us with counters */ -static int update_counters(void __user *user, unsigned int len) +static int update_counters(struct net *net, void __user *user, unsigned int len) { int i, ret; struct ebt_counter *tmp; @@ -1228,7 +1244,7 @@ static int update_counters(void __user *user, unsigned int len) return -ENOMEM; } - t = find_table_lock(hlp.name, &ret, &ebt_mutex); + t = find_table_lock(net, hlp.name, &ret, &ebt_mutex); if (!t) goto free_tmp; @@ -1386,10 +1402,10 @@ static int do_ebt_set_ctl(struct sock *sk, switch(cmd) { case EBT_SO_SET_ENTRIES: - ret = do_replace(user, len); + ret = do_replace(sock_net(sk), user, len); break; case EBT_SO_SET_COUNTERS: - ret = update_counters(user, len); + ret = update_counters(sock_net(sk), user, len); break; default: ret = -EINVAL; @@ -1406,7 +1422,7 @@ static int do_ebt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) if (copy_from_user(&tmp, user, sizeof(tmp))) return -EFAULT; - t = find_table_lock(tmp.name, &ret, &ebt_mutex); + t = find_table_lock(sock_net(sk), tmp.name, &ret, &ebt_mutex); if (!t) return ret; diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c index c99eecf..fdf6811 100644 --- a/net/ipv4/netfilter.c +++ b/net/ipv4/netfilter.c @@ -125,6 +125,7 @@ struct ip_rt_info { __be32 daddr; __be32 saddr; u_int8_t tos; + u_int32_t mark; }; static void nf_ip_saveroute(const struct sk_buff *skb, @@ -138,6 +139,7 @@ static void nf_ip_saveroute(const struct sk_buff *skb, rt_info->tos = iph->tos; rt_info->daddr = iph->daddr; rt_info->saddr = iph->saddr; + rt_info->mark = skb->mark; } } @@ -150,6 +152,7 @@ static int nf_ip_reroute(struct sk_buff *skb, const struct iphdr *iph = ip_hdr(skb); if (!(iph->tos == rt_info->tos + && skb->mark == rt_info->mark && iph->daddr == rt_info->daddr && iph->saddr == rt_info->saddr)) return ip_route_me_harder(skb, RTN_UNSPEC); diff --git a/net/ipv4/netfilter/arptable_filter.c b/net/ipv4/netfilter/arptable_filter.c index bee3d11..e091187 100644 --- a/net/ipv4/netfilter/arptable_filter.c +++ b/net/ipv4/netfilter/arptable_filter.c @@ -75,16 +75,6 @@ static unsigned int arpt_out_hook(unsigned int hook, dev_net(out)->ipv4.arptable_filter); } -static unsigned int arpt_forward_hook(unsigned int hook, - struct sk_buff *skb, - const struct net_device *in, - const struct net_device *out, - int (*okfn)(struct sk_buff *)) -{ - return arpt_do_table(skb, hook, in, out, - dev_net(in)->ipv4.arptable_filter); -} - static struct nf_hook_ops arpt_ops[] __read_mostly = { { .hook = arpt_in_hook, @@ -101,7 +91,7 @@ static struct nf_hook_ops arpt_ops[] __read_mostly = { .priority = NF_IP_PRI_FILTER, }, { - .hook = arpt_forward_hook, + .hook = arpt_in_hook, .owner = THIS_MODULE, .pf = NFPROTO_ARP, .hooknum = NF_ARP_FORWARD, diff --git a/net/ipv4/netfilter/ipt_addrtype.c b/net/ipv4/netfilter/ipt_addrtype.c index 88762f0..3b216be 100644 --- a/net/ipv4/netfilter/ipt_addrtype.c +++ b/net/ipv4/netfilter/ipt_addrtype.c @@ -23,24 +23,25 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_DESCRIPTION("Xtables: address type match for IPv4"); -static inline bool match_type(const struct net_device *dev, __be32 addr, - u_int16_t mask) +static inline bool match_type(struct net *net, const struct net_device *dev, + __be32 addr, u_int16_t mask) { - return !!(mask & (1 << inet_dev_addr_type(&init_net, dev, addr))); + return !!(mask & (1 << inet_dev_addr_type(net, dev, addr))); } static bool addrtype_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par) { + struct net *net = dev_net(par->in ? par->in : par->out); const struct ipt_addrtype_info *info = par->matchinfo; const struct iphdr *iph = ip_hdr(skb); bool ret = true; if (info->source) - ret &= match_type(NULL, iph->saddr, info->source) ^ + ret &= match_type(net, NULL, iph->saddr, info->source) ^ info->invert_source; if (info->dest) - ret &= match_type(NULL, iph->daddr, info->dest) ^ + ret &= match_type(net, NULL, iph->daddr, info->dest) ^ info->invert_dest; return ret; @@ -49,6 +50,7 @@ addrtype_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par) static bool addrtype_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par) { + struct net *net = dev_net(par->in ? par->in : par->out); const struct ipt_addrtype_info_v1 *info = par->matchinfo; const struct iphdr *iph = ip_hdr(skb); const struct net_device *dev = NULL; @@ -60,10 +62,10 @@ addrtype_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par) dev = par->out; if (info->source) - ret &= match_type(dev, iph->saddr, info->source) ^ + ret &= match_type(net, dev, iph->saddr, info->source) ^ (info->flags & IPT_ADDRTYPE_INVERT_SOURCE); if (ret && info->dest) - ret &= match_type(dev, iph->daddr, info->dest) ^ + ret &= match_type(net, dev, iph->daddr, info->dest) ^ !!(info->flags & IPT_ADDRTYPE_INVERT_DEST); return ret; } diff --git a/net/ipv4/netfilter/nf_nat_rule.c b/net/ipv4/netfilter/nf_nat_rule.c index a4f1c347..cf95469 100644 --- a/net/ipv4/netfilter/nf_nat_rule.c +++ b/net/ipv4/netfilter/nf_nat_rule.c @@ -86,24 +86,6 @@ ipt_snat_target(struct sk_buff *skb, const struct xt_target_param *par) return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_SRC); } -/* Before 2.6.11 we did implicit source NAT if required. Warn about change. */ -static void warn_if_extra_mangle(struct net *net, __be32 dstip, __be32 srcip) -{ - static int warned = 0; - struct flowi fl = { .nl_u = { .ip4_u = { .daddr = dstip } } }; - struct rtable *rt; - - if (ip_route_output_key(net, &rt, &fl) != 0) - return; - - if (rt->rt_src != srcip && !warned) { - printk("NAT: no longer support implicit source local NAT\n"); - printk("NAT: packet src %pI4 -> dst %pI4\n", &srcip, &dstip); - warned = 1; - } - ip_rt_put(rt); -} - static unsigned int ipt_dnat_target(struct sk_buff *skb, const struct xt_target_param *par) { @@ -119,11 +101,6 @@ ipt_dnat_target(struct sk_buff *skb, const struct xt_target_param *par) /* Connection must be valid and new. */ NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED)); - if (par->hooknum == NF_INET_LOCAL_OUT && - mr->range[0].flags & IP_NAT_RANGE_MAP_IPS) - warn_if_extra_mangle(dev_net(par->out), ip_hdr(skb)->daddr, - mr->range[0].min_ip); - return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_DST); } diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index 627e21d..834cea6 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -56,6 +56,7 @@ EXPORT_SYMBOL(ip6_route_me_harder); struct ip6_rt_info { struct in6_addr daddr; struct in6_addr saddr; + u_int32_t mark; }; static void nf_ip6_saveroute(const struct sk_buff *skb, @@ -68,6 +69,7 @@ static void nf_ip6_saveroute(const struct sk_buff *skb, rt_info->daddr = iph->daddr; rt_info->saddr = iph->saddr; + rt_info->mark = skb->mark; } } @@ -79,7 +81,8 @@ static int nf_ip6_reroute(struct sk_buff *skb, if (entry->hook == NF_INET_LOCAL_OUT) { struct ipv6hdr *iph = ipv6_hdr(skb); if (!ipv6_addr_equal(&iph->daddr, &rt_info->daddr) || - !ipv6_addr_equal(&iph->saddr, &rt_info->saddr)) + !ipv6_addr_equal(&iph->saddr, &rt_info->saddr) || + skb->mark != rt_info->mark) return ip6_route_me_harder(skb); } return 0; diff --git a/net/ipv6/netfilter/ip6table_filter.c b/net/ipv6/netfilter/ip6table_filter.c index b110a8a8..40d2e36 100644 --- a/net/ipv6/netfilter/ip6table_filter.c +++ b/net/ipv6/netfilter/ip6table_filter.c @@ -61,7 +61,7 @@ static struct xt_table packet_filter = { /* The work comes in here from netfilter.c. */ static unsigned int -ip6t_local_in_hook(unsigned int hook, +ip6t_in_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, const struct net_device *out, @@ -72,17 +72,6 @@ ip6t_local_in_hook(unsigned int hook, } static unsigned int -ip6t_forward_hook(unsigned int hook, - struct sk_buff *skb, - const struct net_device *in, - const struct net_device *out, - int (*okfn)(struct sk_buff *)) -{ - return ip6t_do_table(skb, hook, in, out, - dev_net(in)->ipv6.ip6table_filter); -} - -static unsigned int ip6t_local_out_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in, @@ -105,14 +94,14 @@ ip6t_local_out_hook(unsigned int hook, static struct nf_hook_ops ip6t_ops[] __read_mostly = { { - .hook = ip6t_local_in_hook, + .hook = ip6t_in_hook, .owner = THIS_MODULE, .pf = PF_INET6, .hooknum = NF_INET_LOCAL_IN, .priority = NF_IP6_PRI_FILTER, }, { - .hook = ip6t_forward_hook, + .hook = ip6t_in_hook, .owner = THIS_MODULE, .pf = PF_INET6, .hooknum = NF_INET_FORWARD, diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c index 38aedee..4f8fcf4 100644 --- a/net/netfilter/nf_conntrack_amanda.c +++ b/net/netfilter/nf_conntrack_amanda.c @@ -30,6 +30,7 @@ MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>"); MODULE_DESCRIPTION("Amanda connection tracking module"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_amanda"); +MODULE_ALIAS_NFCT_HELPER("amanda"); module_param(master_timeout, uint, 0600); MODULE_PARM_DESC(master_timeout, "timeout for the master connection"); diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 233fdd2..7e83f74 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -39,13 +39,13 @@ #include <net/netfilter/nf_conntrack_extend.h> #include <net/netfilter/nf_conntrack_acct.h> #include <net/netfilter/nf_nat.h> +#include <net/netfilter/nf_nat_core.h> #define NF_CONNTRACK_VERSION "0.5.0" -unsigned int -(*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct, - enum nf_nat_manip_type manip, - struct nlattr *attr) __read_mostly; +int (*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct, + enum nf_nat_manip_type manip, + struct nlattr *attr) __read_mostly; EXPORT_SYMBOL_GPL(nfnetlink_parse_nat_setup_hook); DEFINE_SPINLOCK(nf_conntrack_lock); @@ -181,7 +181,8 @@ destroy_conntrack(struct nf_conntrack *nfct) NF_CT_ASSERT(atomic_read(&nfct->use) == 0); NF_CT_ASSERT(!timer_pending(&ct->timeout)); - nf_conntrack_event(IPCT_DESTROY, ct); + if (!test_bit(IPS_DYING_BIT, &ct->status)) + nf_conntrack_event(IPCT_DESTROY, ct); set_bit(IPS_DYING_BIT, &ct->status); /* To make sure we don't get any weird locking issues here: @@ -586,14 +587,7 @@ init_conntrack(struct net *net, nf_conntrack_get(&ct->master->ct_general); NF_CT_STAT_INC(net, expect_new); } else { - struct nf_conntrack_helper *helper; - - helper = __nf_ct_helper_find(&repl_tuple); - if (helper) { - help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); - if (help) - rcu_assign_pointer(help->helper, helper); - } + __nf_ct_try_assign_helper(ct, GFP_ATOMIC); NF_CT_STAT_INC(net, new); } @@ -770,7 +764,6 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, const struct nf_conntrack_tuple *newreply) { struct nf_conn_help *help = nfct_help(ct); - struct nf_conntrack_helper *helper; /* Should be unconfirmed, so not in hash table yet */ NF_CT_ASSERT(!nf_ct_is_confirmed(ct)); @@ -783,23 +776,7 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, return; rcu_read_lock(); - helper = __nf_ct_helper_find(newreply); - if (helper == NULL) { - if (help) - rcu_assign_pointer(help->helper, NULL); - goto out; - } - - if (help == NULL) { - help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); - if (help == NULL) - goto out; - } else { - memset(&help->help, 0, sizeof(help->help)); - } - - rcu_assign_pointer(help->helper, helper); -out: + __nf_ct_try_assign_helper(ct, GFP_ATOMIC); rcu_read_unlock(); } EXPORT_SYMBOL_GPL(nf_conntrack_alter_reply); @@ -994,8 +971,20 @@ void nf_ct_iterate_cleanup(struct net *net, } EXPORT_SYMBOL_GPL(nf_ct_iterate_cleanup); +struct __nf_ct_flush_report { + u32 pid; + int report; +}; + static int kill_all(struct nf_conn *i, void *data) { + struct __nf_ct_flush_report *fr = (struct __nf_ct_flush_report *)data; + + /* get_next_corpse sets the dying bit for us */ + nf_conntrack_event_report(IPCT_DESTROY, + i, + fr->pid, + fr->report); return 1; } @@ -1009,9 +998,13 @@ void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced, unsigned int s } EXPORT_SYMBOL_GPL(nf_ct_free_hashtable); -void nf_conntrack_flush(struct net *net) +void nf_conntrack_flush(struct net *net, u32 pid, int report) { - nf_ct_iterate_cleanup(net, kill_all, NULL); + struct __nf_ct_flush_report fr = { + .pid = pid, + .report = report, + }; + nf_ct_iterate_cleanup(net, kill_all, &fr); } EXPORT_SYMBOL_GPL(nf_conntrack_flush); @@ -1027,7 +1020,7 @@ static void nf_conntrack_cleanup_net(struct net *net) nf_ct_event_cache_flush(net); nf_conntrack_ecache_fini(net); i_see_dead_people: - nf_conntrack_flush(net); + nf_conntrack_flush(net, 0, 0); if (atomic_read(&net->ct.count) != 0) { schedule(); goto i_see_dead_people; diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c index a5f5e2e..dee4190 100644 --- a/net/netfilter/nf_conntrack_ecache.c +++ b/net/netfilter/nf_conntrack_ecache.c @@ -35,9 +35,17 @@ static inline void __nf_ct_deliver_cached_events(struct nf_conntrack_ecache *ecache) { if (nf_ct_is_confirmed(ecache->ct) && !nf_ct_is_dying(ecache->ct) - && ecache->events) - atomic_notifier_call_chain(&nf_conntrack_chain, ecache->events, - ecache->ct); + && ecache->events) { + struct nf_ct_event item = { + .ct = ecache->ct, + .pid = 0, + .report = 0 + }; + + atomic_notifier_call_chain(&nf_conntrack_chain, + ecache->events, + &item); + } ecache->events = 0; nf_ct_put(ecache->ct); diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c index 37a703b..3a8a34a 100644 --- a/net/netfilter/nf_conntrack_expect.c +++ b/net/netfilter/nf_conntrack_expect.c @@ -362,7 +362,7 @@ static inline int refresh_timer(struct nf_conntrack_expect *i) return 1; } -int nf_ct_expect_related(struct nf_conntrack_expect *expect) +static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect) { const struct nf_conntrack_expect_policy *p; struct nf_conntrack_expect *i; @@ -371,11 +371,8 @@ int nf_ct_expect_related(struct nf_conntrack_expect *expect) struct net *net = nf_ct_exp_net(expect); struct hlist_node *n; unsigned int h; - int ret; - - NF_CT_ASSERT(master_help); + int ret = 0; - spin_lock_bh(&nf_conntrack_lock); if (!master_help->helper) { ret = -ESHUTDOWN; goto out; @@ -409,18 +406,50 @@ int nf_ct_expect_related(struct nf_conntrack_expect *expect) printk(KERN_WARNING "nf_conntrack: expectation table full\n"); ret = -EMFILE; - goto out; } +out: + return ret; +} + +int nf_ct_expect_related(struct nf_conntrack_expect *expect) +{ + int ret; + + spin_lock_bh(&nf_conntrack_lock); + ret = __nf_ct_expect_check(expect); + if (ret < 0) + goto out; nf_ct_expect_insert(expect); + atomic_inc(&expect->use); + spin_unlock_bh(&nf_conntrack_lock); nf_ct_expect_event(IPEXP_NEW, expect); - ret = 0; + nf_ct_expect_put(expect); + return ret; out: spin_unlock_bh(&nf_conntrack_lock); return ret; } EXPORT_SYMBOL_GPL(nf_ct_expect_related); +int nf_ct_expect_related_report(struct nf_conntrack_expect *expect, + u32 pid, int report) +{ + int ret; + + spin_lock_bh(&nf_conntrack_lock); + ret = __nf_ct_expect_check(expect); + if (ret < 0) + goto out; + nf_ct_expect_insert(expect); +out: + spin_unlock_bh(&nf_conntrack_lock); + if (ret == 0) + nf_ct_expect_event_report(IPEXP_NEW, expect, pid, report); + return ret; +} +EXPORT_SYMBOL_GPL(nf_ct_expect_related_report); + #ifdef CONFIG_PROC_FS struct ct_expect_iter_state { struct seq_net_private p; diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c index 6295009..00fecc3 100644 --- a/net/netfilter/nf_conntrack_ftp.c +++ b/net/netfilter/nf_conntrack_ftp.c @@ -29,6 +29,7 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Rusty Russell <rusty@rustcorp.com.au>"); MODULE_DESCRIPTION("ftp connection tracking helper"); MODULE_ALIAS("ip_conntrack_ftp"); +MODULE_ALIAS_NFCT_HELPER("ftp"); /* This is slow, but it's simple. --RR */ static char *ftp_buffer; @@ -357,7 +358,7 @@ static int help(struct sk_buff *skb, int ret; u32 seq; int dir = CTINFO2DIR(ctinfo); - unsigned int matchlen, matchoff; + unsigned int uninitialized_var(matchlen), uninitialized_var(matchoff); struct nf_ct_ftp_master *ct_ftp_info = &nfct_help(ct)->help.ct_ftp_info; struct nf_conntrack_expect *exp; union nf_inet_addr *daddr; @@ -427,10 +428,8 @@ static int help(struct sk_buff *skb, connection tracking, not packet filtering. However, it is necessary for accurate tracking in this case. */ - if (net_ratelimit()) - printk("conntrack_ftp: partial %s %u+%u\n", - search[dir][i].pattern, - ntohl(th->seq), datalen); + pr_debug("conntrack_ftp: partial %s %u+%u\n", + search[dir][i].pattern, ntohl(th->seq), datalen); ret = NF_DROP; goto out; } else if (found == 0) { /* No match */ diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c index 99bc803..687bd63 100644 --- a/net/netfilter/nf_conntrack_h323_main.c +++ b/net/netfilter/nf_conntrack_h323_main.c @@ -1827,3 +1827,4 @@ MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>"); MODULE_DESCRIPTION("H.323 connection tracking helper"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_h323"); +MODULE_ALIAS_NFCT_HELPER("h323"); diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c index c39b6a9..a51bdac 100644 --- a/net/netfilter/nf_conntrack_helper.c +++ b/net/netfilter/nf_conntrack_helper.c @@ -45,7 +45,7 @@ static unsigned int helper_hash(const struct nf_conntrack_tuple *tuple) (__force __u16)tuple->src.u.all) % nf_ct_helper_hsize; } -struct nf_conntrack_helper * +static struct nf_conntrack_helper * __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple) { struct nf_conntrack_helper *helper; @@ -63,7 +63,6 @@ __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple) } return NULL; } -EXPORT_SYMBOL_GPL(__nf_ct_helper_find); struct nf_conntrack_helper * __nf_conntrack_helper_find_byname(const char *name) @@ -95,6 +94,35 @@ struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct, gfp_t gfp) } EXPORT_SYMBOL_GPL(nf_ct_helper_ext_add); +int __nf_ct_try_assign_helper(struct nf_conn *ct, gfp_t flags) +{ + int ret = 0; + struct nf_conntrack_helper *helper; + struct nf_conn_help *help = nfct_help(ct); + + helper = __nf_ct_helper_find(&ct->tuplehash[IP_CT_DIR_REPLY].tuple); + if (helper == NULL) { + if (help) + rcu_assign_pointer(help->helper, NULL); + goto out; + } + + if (help == NULL) { + help = nf_ct_helper_ext_add(ct, flags); + if (help == NULL) { + ret = -ENOMEM; + goto out; + } + } else { + memset(&help->help, 0, sizeof(help->help)); + } + + rcu_assign_pointer(help->helper, helper); +out: + return ret; +} +EXPORT_SYMBOL_GPL(__nf_ct_try_assign_helper); + static inline int unhelp(struct nf_conntrack_tuple_hash *i, const struct nf_conntrack_helper *me) { diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c index 4d681a0..409c8be 100644 --- a/net/netfilter/nf_conntrack_irc.c +++ b/net/netfilter/nf_conntrack_irc.c @@ -41,6 +41,7 @@ MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); MODULE_DESCRIPTION("IRC (DCC) connection tracking helper"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_irc"); +MODULE_ALIAS_NFCT_HELPER("irc"); module_param_array(ports, ushort, &ports_c, 0400); MODULE_PARM_DESC(ports, "port numbers of IRC servers"); diff --git a/net/netfilter/nf_conntrack_netbios_ns.c b/net/netfilter/nf_conntrack_netbios_ns.c index 08404e6..5af4273 100644 --- a/net/netfilter/nf_conntrack_netbios_ns.c +++ b/net/netfilter/nf_conntrack_netbios_ns.c @@ -37,6 +37,7 @@ MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_DESCRIPTION("NetBIOS name service broadcast connection tracking helper"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_netbios_ns"); +MODULE_ALIAS_NFCT_HELPER("netbios_ns"); static unsigned int timeout __read_mostly = 3; module_param(timeout, uint, 0400); diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 5f4a651..00e8c27 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -105,16 +105,14 @@ ctnetlink_dump_tuples(struct sk_buff *skb, struct nf_conntrack_l3proto *l3proto; struct nf_conntrack_l4proto *l4proto; - l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); + l3proto = __nf_ct_l3proto_find(tuple->src.l3num); ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); - nf_ct_l3proto_put(l3proto); if (unlikely(ret < 0)) return ret; - l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); + l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); - nf_ct_l4proto_put(l4proto); return ret; } @@ -151,11 +149,9 @@ ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) struct nlattr *nest_proto; int ret; - l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); - if (!l4proto->to_nlattr) { - nf_ct_l4proto_put(l4proto); + l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); + if (!l4proto->to_nlattr) return 0; - } nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); if (!nest_proto) @@ -163,14 +159,11 @@ ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) ret = l4proto->to_nlattr(skb, nest_proto, ct); - nf_ct_l4proto_put(l4proto); - nla_nest_end(skb, nest_proto); return ret; nla_put_failure: - nf_ct_l4proto_put(l4proto); return -1; } @@ -184,7 +177,6 @@ ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) if (!help) return 0; - rcu_read_lock(); helper = rcu_dereference(help->helper); if (!helper) goto out; @@ -199,11 +191,9 @@ ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) nla_nest_end(skb, nest_helper); out: - rcu_read_unlock(); return 0; nla_put_failure: - rcu_read_unlock(); return -1; } @@ -420,7 +410,8 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, struct nlmsghdr *nlh; struct nfgenmsg *nfmsg; struct nlattr *nest_parms; - struct nf_conn *ct = (struct nf_conn *)ptr; + struct nf_ct_event *item = (struct nf_ct_event *)ptr; + struct nf_conn *ct = item->ct; struct sk_buff *skb; unsigned int type; sk_buff_data_t b; @@ -453,7 +444,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, b = skb->tail; type |= NFNL_SUBSYS_CTNETLINK << 8; - nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); + nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); nfmsg = NLMSG_DATA(nlh); nlh->nlmsg_flags = flags; @@ -461,6 +452,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, nfmsg->version = NFNETLINK_V0; nfmsg->res_id = 0; + rcu_read_lock(); nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); if (!nest_parms) goto nla_put_failure; @@ -517,13 +509,15 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, && ctnetlink_dump_mark(skb, ct) < 0) goto nla_put_failure; #endif + rcu_read_unlock(); nlh->nlmsg_len = skb->tail - b; - nfnetlink_send(skb, 0, group, 0); + nfnetlink_send(skb, item->pid, group, item->report); return NOTIFY_DONE; -nlmsg_failure: nla_put_failure: + rcu_read_unlock(); +nlmsg_failure: kfree_skb(skb); return NOTIFY_DONE; } @@ -729,7 +723,9 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); else { /* Flush the whole table */ - nf_conntrack_flush(&init_net); + nf_conntrack_flush(&init_net, + NETLINK_CB(skb).pid, + nlmsg_report(nlh)); return 0; } @@ -750,6 +746,14 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, } } + nf_conntrack_event_report(IPCT_DESTROY, + ct, + NETLINK_CB(skb).pid, + nlmsg_report(nlh)); + + /* death_by_timeout would report the event again */ + set_bit(IPS_DYING_BIT, &ct->status); + nf_ct_kill(ct); nf_ct_put(ct); @@ -795,8 +799,10 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, return -ENOMEM; } + rcu_read_lock(); err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, IPCTNL_MSG_CT_NEW, 1, ct); + rcu_read_unlock(); nf_ct_put(ct); if (err <= 0) goto free; @@ -922,8 +928,22 @@ ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) } helper = __nf_conntrack_helper_find_byname(helpname); - if (helper == NULL) + if (helper == NULL) { +#ifdef CONFIG_MODULES + spin_unlock_bh(&nf_conntrack_lock); + + if (request_module("nfct-helper-%s", helpname) < 0) { + spin_lock_bh(&nf_conntrack_lock); + return -EOPNOTSUPP; + } + + spin_lock_bh(&nf_conntrack_lock); + helper = __nf_conntrack_helper_find_byname(helpname); + if (helper) + return -EAGAIN; +#endif return -EOPNOTSUPP; + } if (help) { if (help->helper == helper) @@ -1079,15 +1099,38 @@ ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) return 0; } +static inline void +ctnetlink_event_report(struct nf_conn *ct, u32 pid, int report) +{ + unsigned int events = 0; + + if (test_bit(IPS_EXPECTED_BIT, &ct->status)) + events |= IPCT_RELATED; + else + events |= IPCT_NEW; + + nf_conntrack_event_report(IPCT_STATUS | + IPCT_HELPER | + IPCT_REFRESH | + IPCT_PROTOINFO | + IPCT_NATSEQADJ | + IPCT_MARK | + events, + ct, + pid, + report); +} + static int ctnetlink_create_conntrack(struct nlattr *cda[], struct nf_conntrack_tuple *otuple, struct nf_conntrack_tuple *rtuple, - struct nf_conn *master_ct) + struct nf_conn *master_ct, + u32 pid, + int report) { struct nf_conn *ct; int err = -EINVAL; - struct nf_conn_help *help; struct nf_conntrack_helper *helper; ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC); @@ -1102,16 +1145,55 @@ ctnetlink_create_conntrack(struct nlattr *cda[], ct->status |= IPS_CONFIRMED; rcu_read_lock(); - helper = __nf_ct_helper_find(rtuple); - if (helper) { - help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); - if (help == NULL) { + if (cda[CTA_HELP]) { + char *helpname; + + err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); + if (err < 0) { + rcu_read_unlock(); + goto err; + } + + helper = __nf_conntrack_helper_find_byname(helpname); + if (helper == NULL) { + rcu_read_unlock(); +#ifdef CONFIG_MODULES + if (request_module("nfct-helper-%s", helpname) < 0) { + err = -EOPNOTSUPP; + goto err; + } + + rcu_read_lock(); + helper = __nf_conntrack_helper_find_byname(helpname); + if (helper) { + rcu_read_unlock(); + err = -EAGAIN; + goto err; + } + rcu_read_unlock(); +#endif + err = -EOPNOTSUPP; + goto err; + } else { + struct nf_conn_help *help; + + help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); + if (help == NULL) { + rcu_read_unlock(); + err = -ENOMEM; + goto err; + } + + /* not in hash table yet so not strictly necessary */ + rcu_assign_pointer(help->helper, helper); + } + } else { + /* try an implicit helper assignation */ + err = __nf_ct_try_assign_helper(ct, GFP_ATOMIC); + if (err < 0) { rcu_read_unlock(); - err = -ENOMEM; goto err; } - /* not in hash table yet so not strictly necessary */ - rcu_assign_pointer(help->helper, helper); } if (cda[CTA_STATUS]) { @@ -1151,9 +1233,12 @@ ctnetlink_create_conntrack(struct nlattr *cda[], ct->master = master_ct; } + nf_conntrack_get(&ct->ct_general); add_timer(&ct->timeout); nf_conntrack_hash_insert(ct); rcu_read_unlock(); + ctnetlink_event_report(ct, pid, report); + nf_ct_put(ct); return 0; @@ -1209,7 +1294,7 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, goto out_unlock; } master_ct = nf_ct_tuplehash_to_ctrack(master_h); - atomic_inc(&master_ct->ct_general.use); + nf_conntrack_get(&master_ct->ct_general); } err = -ENOENT; @@ -1217,9 +1302,10 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, err = ctnetlink_create_conntrack(cda, &otuple, &rtuple, - master_ct); + master_ct, + NETLINK_CB(skb).pid, + nlmsg_report(nlh)); spin_unlock_bh(&nf_conntrack_lock); - if (err < 0 && master_ct) nf_ct_put(master_ct); @@ -1231,6 +1317,8 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, * so there's no need to increase the refcount */ err = -EEXIST; if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { + struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); + /* we only allow nat config for new conntracks */ if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { err = -EOPNOTSUPP; @@ -1241,8 +1329,19 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, err = -EOPNOTSUPP; goto out_unlock; } - err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), - cda); + + err = ctnetlink_change_conntrack(ct, cda); + if (err == 0) { + nf_conntrack_get(&ct->ct_general); + spin_unlock_bh(&nf_conntrack_lock); + ctnetlink_event_report(ct, + NETLINK_CB(skb).pid, + nlmsg_report(nlh)); + nf_ct_put(ct); + } else + spin_unlock_bh(&nf_conntrack_lock); + + return err; } out_unlock: @@ -1293,16 +1392,14 @@ ctnetlink_exp_dump_mask(struct sk_buff *skb, if (!nest_parms) goto nla_put_failure; - l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); + l3proto = __nf_ct_l3proto_find(tuple->src.l3num); ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); - nf_ct_l3proto_put(l3proto); if (unlikely(ret < 0)) goto nla_put_failure; - l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); + l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); - nf_ct_l4proto_put(l4proto); if (unlikely(ret < 0)) goto nla_put_failure; @@ -1379,7 +1476,8 @@ static int ctnetlink_expect_event(struct notifier_block *this, { struct nlmsghdr *nlh; struct nfgenmsg *nfmsg; - struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; + struct nf_exp_event *item = (struct nf_exp_event *)ptr; + struct nf_conntrack_expect *exp = item->exp; struct sk_buff *skb; unsigned int type; sk_buff_data_t b; @@ -1401,7 +1499,7 @@ static int ctnetlink_expect_event(struct notifier_block *this, b = skb->tail; type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; - nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); + nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg)); nfmsg = NLMSG_DATA(nlh); nlh->nlmsg_flags = flags; @@ -1409,15 +1507,18 @@ static int ctnetlink_expect_event(struct notifier_block *this, nfmsg->version = NFNETLINK_V0; nfmsg->res_id = 0; + rcu_read_lock(); if (ctnetlink_exp_dump_expect(skb, exp) < 0) goto nla_put_failure; + rcu_read_unlock(); nlh->nlmsg_len = skb->tail - b; - nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); + nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report); return NOTIFY_DONE; -nlmsg_failure: nla_put_failure: + rcu_read_unlock(); +nlmsg_failure: kfree_skb(skb); return NOTIFY_DONE; } @@ -1521,9 +1622,11 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, if (!skb2) goto out; + rcu_read_lock(); err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, 1, exp); + rcu_read_unlock(); if (err <= 0) goto free; @@ -1624,7 +1727,7 @@ ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) } static int -ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) +ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report) { struct nf_conntrack_tuple tuple, mask, master_tuple; struct nf_conntrack_tuple_hash *h = NULL; @@ -1653,7 +1756,7 @@ ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) if (!help || !help->helper) { /* such conntrack hasn't got any helper, abort */ - err = -EINVAL; + err = -EOPNOTSUPP; goto out; } @@ -1671,7 +1774,7 @@ ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); exp->mask.src.u.all = mask.src.u.all; - err = nf_ct_expect_related(exp); + err = nf_ct_expect_related_report(exp, pid, report); nf_ct_expect_put(exp); out: @@ -1704,8 +1807,12 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, if (!exp) { spin_unlock_bh(&nf_conntrack_lock); err = -ENOENT; - if (nlh->nlmsg_flags & NLM_F_CREATE) - err = ctnetlink_create_expect(cda, u3); + if (nlh->nlmsg_flags & NLM_F_CREATE) { + err = ctnetlink_create_expect(cda, + u3, + NETLINK_CB(skb).pid, + nlmsg_report(nlh)); + } return err; } diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c index 1bc3001..9e169ef 100644 --- a/net/netfilter/nf_conntrack_pptp.c +++ b/net/netfilter/nf_conntrack_pptp.c @@ -37,6 +37,7 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>"); MODULE_DESCRIPTION("Netfilter connection tracking helper module for PPTP"); MODULE_ALIAS("ip_conntrack_pptp"); +MODULE_ALIAS_NFCT_HELPER("pptp"); static DEFINE_SPINLOCK(nf_pptp_lock); diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c index 4ab62ad..1b279f9d 100644 --- a/net/netfilter/nf_conntrack_proto_gre.c +++ b/net/netfilter/nf_conntrack_proto_gre.c @@ -341,7 +341,7 @@ static int __init nf_ct_proto_gre_init(void) return rv; } -static void nf_ct_proto_gre_fini(void) +static void __exit nf_ct_proto_gre_fini(void) { nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_gre4); unregister_pernet_gen_subsys(proto_gre_net_id, &proto_gre_net_ops); diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c index c2bd457..74e0379 100644 --- a/net/netfilter/nf_conntrack_proto_sctp.c +++ b/net/netfilter/nf_conntrack_proto_sctp.c @@ -317,7 +317,7 @@ static int sctp_packet(struct nf_conn *ct, goto out; } - old_state = new_state = SCTP_CONNTRACK_MAX; + old_state = new_state = SCTP_CONNTRACK_NONE; write_lock_bh(&sctp_lock); for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { /* Special cases of Verification tag check (Sec 8.5.1) */ diff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c index a94294b..dcfecbb 100644 --- a/net/netfilter/nf_conntrack_sane.c +++ b/net/netfilter/nf_conntrack_sane.c @@ -30,6 +30,7 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Michal Schmidt <mschmidt@redhat.com>"); MODULE_DESCRIPTION("SANE connection tracking helper"); +MODULE_ALIAS_NFCT_HELPER("sane"); static char *sane_buffer; diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index 6813f1c..4b57216 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -28,6 +28,7 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Christian Hentschel <chentschel@arnet.com.ar>"); MODULE_DESCRIPTION("SIP connection tracking helper"); MODULE_ALIAS("ip_conntrack_sip"); +MODULE_ALIAS_NFCT_HELPER("sip"); #define MAX_PORTS 8 static unsigned short ports[MAX_PORTS]; diff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c index f57f6e7..46e646b 100644 --- a/net/netfilter/nf_conntrack_tftp.c +++ b/net/netfilter/nf_conntrack_tftp.c @@ -22,6 +22,7 @@ MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>"); MODULE_DESCRIPTION("TFTP connection tracking helper"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_tftp"); +MODULE_ALIAS_NFCT_HELPER("tftp"); #define MAX_PORTS 8 static unsigned short ports[MAX_PORTS]; diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index 41e0105..2770b4e 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -30,6 +30,7 @@ #include <linux/random.h> #include <net/sock.h> #include <net/netfilter/nf_log.h> +#include <net/netfilter/nfnetlink_log.h> #include <asm/atomic.h> @@ -533,7 +534,7 @@ static struct nf_loginfo default_loginfo = { }; /* log handler for internal netfilter logging api */ -static void +void nfulnl_log_packet(u_int8_t pf, unsigned int hooknum, const struct sk_buff *skb, @@ -648,6 +649,7 @@ alloc_failure: /* FIXME: statistics */ goto unlock_and_release; } +EXPORT_SYMBOL_GPL(nfulnl_log_packet); static int nfulnl_rcv_nl_event(struct notifier_block *this, diff --git a/net/netfilter/xt_NFLOG.c b/net/netfilter/xt_NFLOG.c index 50e3a52..a57c5cf 100644 --- a/net/netfilter/xt_NFLOG.c +++ b/net/netfilter/xt_NFLOG.c @@ -13,6 +13,7 @@ #include <linux/netfilter/x_tables.h> #include <linux/netfilter/xt_NFLOG.h> #include <net/netfilter/nf_log.h> +#include <net/netfilter/nfnetlink_log.h> MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_DESCRIPTION("Xtables: packet logging to netlink using NFLOG"); @@ -31,8 +32,8 @@ nflog_tg(struct sk_buff *skb, const struct xt_target_param *par) li.u.ulog.group = info->group; li.u.ulog.qthreshold = info->threshold; - nf_log_packet(par->family, par->hooknum, skb, par->in, - par->out, &li, "%s", info->prefix); + nfulnl_log_packet(par->family, par->hooknum, skb, par->in, + par->out, &li, info->prefix); return XT_CONTINUE; } diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index 3c3dd22b..fe80b61 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -72,9 +72,6 @@ struct recent_entry { struct recent_table { struct list_head list; char name[XT_RECENT_NAME_LEN]; -#ifdef CONFIG_PROC_FS - struct proc_dir_entry *proc_old, *proc; -#endif unsigned int refcnt; unsigned int entries; struct list_head lru_list; @@ -284,6 +281,9 @@ static bool recent_mt_check(const struct xt_mtchk_param *par) { const struct xt_recent_mtinfo *info = par->matchinfo; struct recent_table *t; +#ifdef CONFIG_PROC_FS + struct proc_dir_entry *pde; +#endif unsigned i; bool ret = false; @@ -318,25 +318,25 @@ static bool recent_mt_check(const struct xt_mtchk_param *par) for (i = 0; i < ip_list_hash_size; i++) INIT_LIST_HEAD(&t->iphash[i]); #ifdef CONFIG_PROC_FS - t->proc = proc_create_data(t->name, ip_list_perms, recent_proc_dir, + pde = proc_create_data(t->name, ip_list_perms, recent_proc_dir, &recent_mt_fops, t); - if (t->proc == NULL) { + if (pde == NULL) { kfree(t); goto out; } + pde->uid = ip_list_uid; + pde->gid = ip_list_gid; #ifdef CONFIG_NETFILTER_XT_MATCH_RECENT_PROC_COMPAT - t->proc_old = proc_create_data(t->name, ip_list_perms, proc_old_dir, + pde = proc_create_data(t->name, ip_list_perms, proc_old_dir, &recent_old_fops, t); - if (t->proc_old == NULL) { + if (pde == NULL) { remove_proc_entry(t->name, proc_old_dir); kfree(t); goto out; } - t->proc_old->uid = ip_list_uid; - t->proc_old->gid = ip_list_gid; + pde->uid = ip_list_uid; + pde->gid = ip_list_gid; #endif - t->proc->uid = ip_list_uid; - t->proc->gid = ip_list_gid; #endif spin_lock_bh(&recent_lock); list_add_tail(&t->list, &tables); |
