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netfilter: nf_conntrack: add support for "conntrack zones"

Browse Source 
Normally, each connection needs a unique identity. Conntrack zones allow
to specify a numerical zone using the CT target, connections in different
zones can use the same identity.

Example:

iptables -t raw -A PREROUTING -i veth0 -j CT --zone 1
iptables -t raw -A OUTPUT -o veth1 -j CT --zone 1

Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Patrick McHardy 2010-02-15 18:13:33 +01:00
parent 8fea97ec17
commit 5d0aa2ccd4
25 changed files with 235 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/netfilter/xt_CT.h
View File

@ -5,7 +5,7 @@
struct xt_ct_target_info {
u_int16_t flags;
u_int16_t __unused;
u_int16_t zone;
u_int32_t ct_events;
u_int32_t exp_events;
char helper[16];

3
include/net/ip.h
View File

@ -352,8 +352,11 @@ enum ip_defrag_users {
IP_DEFRAG_LOCAL_DELIVER,
IP_DEFRAG_CALL_RA_CHAIN,
IP_DEFRAG_CONNTRACK_IN,
__IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHORT_MAX,
IP_DEFRAG_CONNTRACK_OUT,
__IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHORT_MAX,
IP_DEFRAG_CONNTRACK_BRIDGE_IN,
__IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHORT_MAX,
IP_DEFRAG_VS_IN,
IP_DEFRAG_VS_OUT,
IP_DEFRAG_VS_FWD

3
include/net/ipv6.h
View File

@ -355,8 +355,11 @@ struct inet_frag_queue;
enum ip6_defrag_users {
IP6_DEFRAG_LOCAL_DELIVER,
IP6_DEFRAG_CONNTRACK_IN,
__IP6_DEFRAG_CONNTRACK_IN = IP6_DEFRAG_CONNTRACK_IN + USHORT_MAX,
IP6_DEFRAG_CONNTRACK_OUT,
__IP6_DEFRAG_CONNTRACK_OUT = IP6_DEFRAG_CONNTRACK_OUT + USHORT_MAX,
IP6_DEFRAG_CONNTRACK_BRIDGE_IN,
__IP6_DEFRAG_CONNTRACK_BRIDGE_IN = IP6_DEFRAG_CONNTRACK_BRIDGE_IN + USHORT_MAX,
};
struct ip6_create_arg {

5
include/net/netfilter/nf_conntrack.h
View File

@ -198,7 +198,8 @@ extern void *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced, int null
extern void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size);
extern struct nf_conntrack_tuple_hash *
__nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple);
__nf_conntrack_find(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
extern void nf_conntrack_hash_insert(struct nf_conn *ct);
extern void nf_ct_delete_from_lists(struct nf_conn *ct);
@ -267,7 +268,7 @@ extern void
nf_ct_iterate_cleanup(struct net *net, int (*iter)(struct nf_conn *i, void *data), void *data);
extern void nf_conntrack_free(struct nf_conn *ct);
extern struct nf_conn *
nf_conntrack_alloc(struct net *net,
nf_conntrack_alloc(struct net *net, u16 zone,
const struct nf_conntrack_tuple *orig,
const struct nf_conntrack_tuple *repl,
gfp_t gfp);

3
include/net/netfilter/nf_conntrack_core.h
View File

@ -49,7 +49,8 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
/* Find a connection corresponding to a tuple. */
extern struct nf_conntrack_tuple_hash *
nf_conntrack_find_get(struct net *net, const struct nf_conntrack_tuple *tuple);
nf_conntrack_find_get(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
extern int __nf_conntrack_confirm(struct sk_buff *skb);

9
include/net/netfilter/nf_conntrack_expect.h
View File

@ -74,13 +74,16 @@ int nf_conntrack_expect_init(struct net *net);
void nf_conntrack_expect_fini(struct net *net);
struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net, const struct nf_conntrack_tuple *tuple);
__nf_ct_expect_find(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
struct nf_conntrack_expect *
nf_ct_expect_find_get(struct net *net, const struct nf_conntrack_tuple *tuple);
nf_ct_expect_find_get(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
struct nf_conntrack_expect *
nf_ct_find_expectation(struct net *net, const struct nf_conntrack_tuple *tuple);
nf_ct_find_expectation(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
void nf_ct_remove_expectations(struct nf_conn *ct);

2
include/net/netfilter/nf_conntrack_extend.h
View File

@ -8,6 +8,7 @@ enum nf_ct_ext_id {
NF_CT_EXT_NAT,
NF_CT_EXT_ACCT,
NF_CT_EXT_ECACHE,
NF_CT_EXT_ZONE,
NF_CT_EXT_NUM,
};
@ -15,6 +16,7 @@ enum nf_ct_ext_id {
#define NF_CT_EXT_NAT_TYPE struct nf_conn_nat
#define NF_CT_EXT_ACCT_TYPE struct nf_conn_counter
#define NF_CT_EXT_ECACHE_TYPE struct nf_conntrack_ecache
#define NF_CT_EXT_ZONE_TYPE struct nf_conntrack_zone
/* Extensions: optional stuff which isn't permanently in struct. */
struct nf_ct_ext {

23
include/net/netfilter/nf_conntrack_zones.h Normal file
View File

@ -0,0 +1,23 @@
#ifndef _NF_CONNTRACK_ZONES_H
#define _NF_CONNTRACK_ZONES_H
#include <net/netfilter/nf_conntrack_extend.h>
#define NF_CT_DEFAULT_ZONE 0
struct nf_conntrack_zone {
u16 id;
};
static inline u16 nf_ct_zone(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
struct nf_conntrack_zone *nf_ct_zone;
nf_ct_zone = nf_ct_ext_find(ct, NF_CT_EXT_ZONE);
if (nf_ct_zone)
return nf_ct_zone->id;
#endif
return NF_CT_DEFAULT_ZONE;
}
#endif /* _NF_CONNTRACK_ZONES_H */

3
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View File

@ -22,6 +22,7 @@
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/nf_nat_helper.h>
@ -266,7 +267,7 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len)
return -EINVAL;
}
h = nf_conntrack_find_get(sock_net(sk), &tuple);
h = nf_conntrack_find_get(sock_net(sk), NF_CT_DEFAULT_ZONE, &tuple);
if (h) {
struct sockaddr_in sin;
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);

8
net/ipv4/netfilter/nf_conntrack_proto_icmp.c
View File

@ -18,6 +18,7 @@
#include <net/netfilter/nf_conntrack_tuple.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_log.h>
static unsigned int nf_ct_icmp_timeout __read_mostly = 30*HZ;
@ -114,13 +115,14 @@ static bool icmp_new(struct nf_conn *ct, const struct sk_buff *skb,
/* Returns conntrack if it dealt with ICMP, and filled in skb fields */
static int
icmp_error_message(struct net *net, struct sk_buff *skb,
icmp_error_message(struct net *net, struct nf_conn *tmpl, struct sk_buff *skb,
enum ip_conntrack_info *ctinfo,
unsigned int hooknum)
{
struct nf_conntrack_tuple innertuple, origtuple;
const struct nf_conntrack_l4proto *innerproto;
const struct nf_conntrack_tuple_hash *h;
u16 zone = tmpl ? nf_ct_zone(tmpl) : NF_CT_DEFAULT_ZONE;
NF_CT_ASSERT(skb->nfct == NULL);
@ -146,7 +148,7 @@ icmp_error_message(struct net *net, struct sk_buff *skb,
*ctinfo = IP_CT_RELATED;
h = nf_conntrack_find_get(net, &innertuple);
h = nf_conntrack_find_get(net, zone, &innertuple);
if (!h) {
pr_debug("icmp_error_message: no match\n");
return -NF_ACCEPT;
@ -209,7 +211,7 @@ icmp_error(struct net *net, struct nf_conn *tmpl,
icmph->type != ICMP_REDIRECT)
return NF_ACCEPT;
return icmp_error_message(net, skb, ctinfo, hooknum);
return icmp_error_message(net, tmpl, skb, ctinfo, hooknum);
}
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)

12
net/ipv4/netfilter/nf_defrag_ipv4.c
View File

@ -16,6 +16,7 @@
#include <linux/netfilter_bridge.h>
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
#include <net/netfilter/nf_conntrack.h>
@ -39,15 +40,20 @@ static int nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user)
static enum ip_defrag_users nf_ct_defrag_user(unsigned int hooknum,
struct sk_buff *skb)
{
u16 zone = NF_CT_DEFAULT_ZONE;
if (skb->nfct)
zone = nf_ct_zone((struct nf_conn *)skb->nfct);
#ifdef CONFIG_BRIDGE_NETFILTER
if (skb->nf_bridge &&
skb->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)
return IP_DEFRAG_CONNTRACK_BRIDGE_IN;
return IP_DEFRAG_CONNTRACK_BRIDGE_IN + zone;
#endif
if (hooknum == NF_INET_PRE_ROUTING)
return IP_DEFRAG_CONNTRACK_IN;
return IP_DEFRAG_CONNTRACK_IN + zone;
else
return IP_DEFRAG_CONNTRACK_OUT;
return IP_DEFRAG_CONNTRACK_OUT + zone;
}
static unsigned int ipv4_conntrack_defrag(unsigned int hooknum,

24
net/ipv4/netfilter/nf_nat_core.c
View File

@ -30,6 +30,7 @@
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_zones.h>
static DEFINE_SPINLOCK(nf_nat_lock);
@ -69,13 +70,14 @@ EXPORT_SYMBOL_GPL(nf_nat_proto_put);
/* We keep an extra hash for each conntrack, for fast searching. */
static inline unsigned int
hash_by_src(const struct net *net, const struct nf_conntrack_tuple *tuple)
hash_by_src(const struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
unsigned int hash;
/* Original src, to ensure we map it consistently if poss. */
hash = jhash_3words((__force u32)tuple->src.u3.ip,
(__force u32)tuple->src.u.all,
(__force u32)tuple->src.u.all ^ zone,
tuple->dst.protonum, 0);
return ((u64)hash * net->ipv4.nat_htable_size) >> 32;
}
@ -139,12 +141,12 @@ same_src(const struct nf_conn *ct,
/* Only called for SRC manip */
static int
find_appropriate_src(struct net *net,
find_appropriate_src(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple,
struct nf_conntrack_tuple *result,
const struct nf_nat_range *range)
{
unsigned int h = hash_by_src(net, tuple);
unsigned int h = hash_by_src(net, zone, tuple);
const struct nf_conn_nat *nat;
const struct nf_conn *ct;
const struct hlist_node *n;
@ -152,7 +154,7 @@ find_appropriate_src(struct net *net,
rcu_read_lock();
hlist_for_each_entry_rcu(nat, n, &net->ipv4.nat_bysource[h], bysource) {
ct = nat->ct;
if (same_src(ct, tuple)) {
if (same_src(ct, tuple) && nf_ct_zone(ct) == zone) {
/* Copy source part from reply tuple. */
nf_ct_invert_tuplepr(result,
&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
@ -175,7 +177,7 @@ find_appropriate_src(struct net *net,
the ip with the lowest src-ip/dst-ip/proto usage.
*/
static void
find_best_ips_proto(struct nf_conntrack_tuple *tuple,
find_best_ips_proto(u16 zone, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
const struct nf_conn *ct,
enum nf_nat_manip_type maniptype)
@ -209,7 +211,7 @@ find_best_ips_proto(struct nf_conntrack_tuple *tuple,
maxip = ntohl(range->max_ip);
j = jhash_2words((__force u32)tuple->src.u3.ip,
range->flags & IP_NAT_RANGE_PERSISTENT ?
0 : (__force u32)tuple->dst.u3.ip, 0);
0 : (__force u32)tuple->dst.u3.ip ^ zone, 0);
j = ((u64)j * (maxip - minip + 1)) >> 32;
*var_ipp = htonl(minip + j);
}
@ -229,6 +231,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
{
struct net *net = nf_ct_net(ct);
const struct nf_nat_protocol *proto;
u16 zone = nf_ct_zone(ct);
/* 1) If this srcip/proto/src-proto-part is currently mapped,
and that same mapping gives a unique tuple within the given
@ -239,7 +242,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
manips not an issue. */
if (maniptype == IP_NAT_MANIP_SRC &&
!(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
if (find_appropriate_src(net, orig_tuple, tuple, range)) {
if (find_appropriate_src(net, zone, orig_tuple, tuple, range)) {
pr_debug("get_unique_tuple: Found current src map\n");
if (!nf_nat_used_tuple(tuple, ct))
return;
@ -249,7 +252,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
/* 2) Select the least-used IP/proto combination in the given
range. */
*tuple = *orig_tuple;
find_best_ips_proto(tuple, range, ct, maniptype);
find_best_ips_proto(zone, tuple, range, ct, maniptype);
/* 3) The per-protocol part of the manip is made to map into
the range to make a unique tuple. */
@ -327,7 +330,8 @@ nf_nat_setup_info(struct nf_conn *ct,
if (have_to_hash) {
unsigned int srchash;
srchash = hash_by_src(net, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
srchash = hash_by_src(net, nf_ct_zone(ct),
&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
spin_lock_bh(&nf_nat_lock);
/* nf_conntrack_alter_reply might re-allocate exntension aera */
nat = nfct_nat(ct);

3
net/ipv4/netfilter/nf_nat_pptp.c
View File

@ -25,6 +25,7 @@
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <linux/netfilter/nf_conntrack_proto_gre.h>
#include <linux/netfilter/nf_conntrack_pptp.h>
@ -74,7 +75,7 @@ static void pptp_nat_expected(struct nf_conn *ct,
pr_debug("trying to unexpect other dir: ");
nf_ct_dump_tuple_ip(&t);
other_exp = nf_ct_expect_find_get(net, &t);
other_exp = nf_ct_expect_find_get(net, nf_ct_zone(ct), &t);
if (other_exp) {
nf_ct_unexpect_related(other_exp);
nf_ct_expect_put(other_exp);

12
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
View File

@ -27,6 +27,7 @@
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
#include <net/netfilter/nf_log.h>
@ -191,15 +192,20 @@ out:
static enum ip6_defrag_users nf_ct6_defrag_user(unsigned int hooknum,
struct sk_buff *skb)
{
u16 zone = NF_CT_DEFAULT_ZONE;
if (skb->nfct)
zone = nf_ct_zone((struct nf_conn *)skb->nfct);
#ifdef CONFIG_BRIDGE_NETFILTER
if (skb->nf_bridge &&
skb->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)
return IP6_DEFRAG_CONNTRACK_BRIDGE_IN;
return IP6_DEFRAG_CONNTRACK_BRIDGE_IN + zone;
#endif
if (hooknum == NF_INET_PRE_ROUTING)
return IP6_DEFRAG_CONNTRACK_IN;
return IP6_DEFRAG_CONNTRACK_IN + zone;
else
return IP6_DEFRAG_CONNTRACK_OUT;
return IP6_DEFRAG_CONNTRACK_OUT + zone;
}

8
net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
View File

@ -23,6 +23,7 @@
#include <net/netfilter/nf_conntrack_tuple.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
#include <net/netfilter/nf_log.h>
@ -128,7 +129,7 @@ static bool icmpv6_new(struct nf_conn *ct, const struct sk_buff *skb,
}
static int
icmpv6_error_message(struct net *net,
icmpv6_error_message(struct net *net, struct nf_conn *tmpl,
struct sk_buff *skb,
unsigned int icmp6off,
enum ip_conntrack_info *ctinfo,
@ -137,6 +138,7 @@ icmpv6_error_message(struct net *net,
struct nf_conntrack_tuple intuple, origtuple;
const struct nf_conntrack_tuple_hash *h;
const struct nf_conntrack_l4proto *inproto;
u16 zone = tmpl ? nf_ct_zone(tmpl) : NF_CT_DEFAULT_ZONE;
NF_CT_ASSERT(skb->nfct == NULL);
@ -163,7 +165,7 @@ icmpv6_error_message(struct net *net,
*ctinfo = IP_CT_RELATED;
h = nf_conntrack_find_get(net, &intuple);
h = nf_conntrack_find_get(net, zone, &intuple);
if (!h) {
pr_debug("icmpv6_error: no match\n");
return -NF_ACCEPT;
@ -216,7 +218,7 @@ icmpv6_error(struct net *net, struct nf_conn *tmpl,
if (icmp6h->icmp6_type >= 128)
return NF_ACCEPT;
return icmpv6_error_message(net, skb, dataoff, ctinfo, hooknum);
return icmpv6_error_message(net, tmpl, skb, dataoff, ctinfo, hooknum);
}
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)

13
net/netfilter/Kconfig
View File

@ -83,6 +83,19 @@ config NF_CONNTRACK_SECMARK
If unsure, say 'N'.
config NF_CONNTRACK_ZONES
bool 'Connection tracking zones'
depends on NETFILTER_ADVANCED
depends on NETFILTER_XT_TARGET_CT
help
This option enables support for connection tracking zones.
Normally, each connection needs to have a unique system wide
identity. Connection tracking zones allow to have multiple
connections using the same identity, as long as they are
contained in different zones.
If unsure, say `N'.
config NF_CONNTRACK_EVENTS
bool "Connection tracking events"
depends on NETFILTER_ADVANCED

107
net/netfilter/nf_conntrack_core.c
View File

@ -42,6 +42,7 @@
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
@ -68,7 +69,7 @@ static int nf_conntrack_hash_rnd_initted;
static unsigned int nf_conntrack_hash_rnd;
static u_int32_t __hash_conntrack(const struct nf_conntrack_tuple *tuple,
unsigned int size, unsigned int rnd)
u16 zone, unsigned int size, unsigned int rnd)
{
unsigned int n;
u_int32_t h;
@ -79,16 +80,16 @@ static u_int32_t __hash_conntrack(const struct nf_conntrack_tuple *tuple,
*/
n = (sizeof(tuple->src) + sizeof(tuple->dst.u3)) / sizeof(u32);
h = jhash2((u32 *)tuple, n,
rnd ^ (((__force __u16)tuple->dst.u.all << 16) |
tuple->dst.protonum));
zone ^ rnd ^ (((__force __u16)tuple->dst.u.all << 16) |
tuple->dst.protonum));
return ((u64)h * size) >> 32;
}
static inline u_int32_t hash_conntrack(const struct net *net,
static inline u_int32_t hash_conntrack(const struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
return __hash_conntrack(tuple, net->ct.htable_size,
return __hash_conntrack(tuple, zone, net->ct.htable_size,
nf_conntrack_hash_rnd);
}
@ -292,11 +293,12 @@ static void death_by_timeout(unsigned long ul_conntrack)
* - Caller must lock nf_conntrack_lock before calling this function
*/
struct nf_conntrack_tuple_hash *
__nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple)
__nf_conntrack_find(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_tuple_hash *h;
struct hlist_nulls_node *n;
unsigned int hash = hash_conntrack(net, tuple);
unsigned int hash = hash_conntrack(net, zone, tuple);
/* Disable BHs the entire time since we normally need to disable them
* at least once for the stats anyway.
@ -304,7 +306,8 @@ __nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple)
local_bh_disable();
begin:
hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnnode) {
if (nf_ct_tuple_equal(tuple, &h->tuple)) {
if (nf_ct_tuple_equal(tuple, &h->tuple) &&
nf_ct_zone(nf_ct_tuplehash_to_ctrack(h)) == zone) {
NF_CT_STAT_INC(net, found);
local_bh_enable();
return h;
@ -326,21 +329,23 @@ EXPORT_SYMBOL_GPL(__nf_conntrack_find);
/* Find a connection corresponding to a tuple. */
struct nf_conntrack_tuple_hash *
nf_conntrack_find_get(struct net *net, const struct nf_conntrack_tuple *tuple)
nf_conntrack_find_get(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
rcu_read_lock();
begin:
h = __nf_conntrack_find(net, tuple);
h = __nf_conntrack_find(net, zone, tuple);
if (h) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (unlikely(nf_ct_is_dying(ct) ||
!atomic_inc_not_zero(&ct->ct_general.use)))
h = NULL;
else {
if (unlikely(!nf_ct_tuple_equal(tuple, &h->tuple))) {
if (unlikely(!nf_ct_tuple_equal(tuple, &h->tuple) ||
nf_ct_zone(ct) != zone)) {
nf_ct_put(ct);
goto begin;
}
@ -368,9 +373,11 @@ void nf_conntrack_hash_insert(struct nf_conn *ct)
{
struct net *net = nf_ct_net(ct);
unsigned int hash, repl_hash;
u16 zone;
hash = hash_conntrack(net, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
repl_hash = hash_conntrack(net, &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
zone = nf_ct_zone(ct);
hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
repl_hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
__nf_conntrack_hash_insert(ct, hash, repl_hash);
}
@ -387,6 +394,7 @@ __nf_conntrack_confirm(struct sk_buff *skb)
struct hlist_nulls_node *n;
enum ip_conntrack_info ctinfo;
struct net *net;
u16 zone;
ct = nf_ct_get(skb, &ctinfo);
net = nf_ct_net(ct);
@ -398,8 +406,9 @@ __nf_conntrack_confirm(struct sk_buff *skb)
if (CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL)
return NF_ACCEPT;
hash = hash_conntrack(net, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
repl_hash = hash_conntrack(net, &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
zone = nf_ct_zone(ct);
hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
repl_hash = hash_conntrack(net, zone, &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
/* We're not in hash table, and we refuse to set up related
connections for unconfirmed conns. But packet copies and
@ -418,11 +427,13 @@ __nf_conntrack_confirm(struct sk_buff *skb)
not in the hash. If there is, we lost race. */
hlist_nulls_for_each_entry(h, n, &net->ct.hash[hash], hnnode)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
&h->tuple))
&h->tuple) &&
zone == nf_ct_zone(nf_ct_tuplehash_to_ctrack(h)))
goto out;
hlist_nulls_for_each_entry(h, n, &net->ct.hash[repl_hash], hnnode)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple,
&h->tuple))
&h->tuple) &&
zone == nf_ct_zone(nf_ct_tuplehash_to_ctrack(h)))
goto out;
/* Remove from unconfirmed list */
@ -469,15 +480,19 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
struct net *net = nf_ct_net(ignored_conntrack);
struct nf_conntrack_tuple_hash *h;
struct hlist_nulls_node *n;
unsigned int hash = hash_conntrack(net, tuple);
struct nf_conn *ct;
u16 zone = nf_ct_zone(ignored_conntrack);
unsigned int hash = hash_conntrack(net, zone, tuple);
/* Disable BHs the entire time since we need to disable them at
* least once for the stats anyway.
*/
rcu_read_lock_bh();
hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnnode) {
if (nf_ct_tuplehash_to_ctrack(h) != ignored_conntrack &&
nf_ct_tuple_equal(tuple, &h->tuple)) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (ct != ignored_conntrack &&
nf_ct_tuple_equal(tuple, &h->tuple) &&
nf_ct_zone(ct) == zone) {
NF_CT_STAT_INC(net, found);
rcu_read_unlock_bh();
return 1;
@ -540,7 +555,7 @@ static noinline int early_drop(struct net *net, unsigned int hash)
return dropped;
}
struct nf_conn *nf_conntrack_alloc(struct net *net,
struct nf_conn *nf_conntrack_alloc(struct net *net, u16 zone,
const struct nf_conntrack_tuple *orig,
const struct nf_conntrack_tuple *repl,
gfp_t gfp)
@ -558,7 +573,7 @@ struct nf_conn *nf_conntrack_alloc(struct net *net,
if (nf_conntrack_max &&
unlikely(atomic_read(&net->ct.count) > nf_conntrack_max)) {
unsigned int hash = hash_conntrack(net, orig);
unsigned int hash = hash_conntrack(net, zone, orig);
if (!early_drop(net, hash)) {
atomic_dec(&net->ct.count);
if (net_ratelimit())
@ -595,13 +610,28 @@ struct nf_conn *nf_conntrack_alloc(struct net *net,
#ifdef CONFIG_NET_NS
ct->ct_net = net;
#endif
#ifdef CONFIG_NF_CONNTRACK_ZONES
if (zone) {
struct nf_conntrack_zone *nf_ct_zone;
nf_ct_zone = nf_ct_ext_add(ct, NF_CT_EXT_ZONE, GFP_ATOMIC);
if (!nf_ct_zone)
goto out_free;
nf_ct_zone->id = zone;
}
#endif
/*
* changes to lookup keys must be done before setting refcnt to 1
*/
smp_wmb();
atomic_set(&ct->ct_general.use, 1);
return ct;
#ifdef CONFIG_NF_CONNTRACK_ZONES
out_free:
kmem_cache_free(net->ct.nf_conntrack_cachep, ct);
return ERR_PTR(-ENOMEM);
#endif
}
EXPORT_SYMBOL_GPL(nf_conntrack_alloc);
@ -631,13 +661,14 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
struct nf_conntrack_tuple repl_tuple;
struct nf_conntrack_ecache *ecache;
struct nf_conntrack_expect *exp;
u16 zone = tmpl ? nf_ct_zone(tmpl) : NF_CT_DEFAULT_ZONE;
if (!nf_ct_invert_tuple(&repl_tuple, tuple, l3proto, l4proto)) {
pr_debug("Can't invert tuple.\n");
return NULL;
}
ct = nf_conntrack_alloc(net, tuple, &repl_tuple, GFP_ATOMIC);
ct = nf_conntrack_alloc(net, zone, tuple, &repl_tuple, GFP_ATOMIC);
if (IS_ERR(ct)) {
pr_debug("Can't allocate conntrack.\n");
return (struct nf_conntrack_tuple_hash *)ct;
@ -657,7 +688,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
GFP_ATOMIC);
spin_lock_bh(&nf_conntrack_lock);
exp = nf_ct_find_expectation(net, tuple);
exp = nf_ct_find_expectation(net, zone, tuple);
if (exp) {
pr_debug("conntrack: expectation arrives ct=%p exp=%p\n",
ct, exp);
@ -713,6 +744,7 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
struct nf_conntrack_tuple tuple;
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
u16 zone = tmpl ? nf_ct_zone(tmpl) : NF_CT_DEFAULT_ZONE;
if (!nf_ct_get_tuple(skb, skb_network_offset(skb),
dataoff, l3num, protonum, &tuple, l3proto,
@ -722,7 +754,7 @@ resolve_normal_ct(struct net *net, struct nf_conn *tmpl,
}
/* look for tuple match */
h = nf_conntrack_find_get(net, &tuple);
h = nf_conntrack_find_get(net, zone, &tuple);
if (!h) {
h = init_conntrack(net, tmpl, &tuple, l3proto, l4proto,
skb, dataoff);
@ -958,6 +990,14 @@ bool __nf_ct_kill_acct(struct nf_conn *ct,
}
EXPORT_SYMBOL_GPL(__nf_ct_kill_acct);
#ifdef CONFIG_NF_CONNTRACK_ZONES
static struct nf_ct_ext_type nf_ct_zone_extend __read_mostly = {
.len = sizeof(struct nf_conntrack_zone),
.align = __alignof__(struct nf_conntrack_zone),
.id = NF_CT_EXT_ZONE,
};
#endif
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
#include <linux/netfilter/nfnetlink.h>
@ -1139,6 +1179,9 @@ static void nf_conntrack_cleanup_init_net(void)
nf_conntrack_helper_fini();
nf_conntrack_proto_fini();
#ifdef CONFIG_NF_CONNTRACK_ZONES
nf_ct_extend_unregister(&nf_ct_zone_extend);
#endif
}
static void nf_conntrack_cleanup_net(struct net *net)
@ -1214,6 +1257,7 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
unsigned int hashsize, old_size;
struct hlist_nulls_head *hash, *old_hash;
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
if (current->nsproxy->net_ns != &init_net)
return -EOPNOTSUPP;
@ -1240,8 +1284,10 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
while (!hlist_nulls_empty(&init_net.ct.hash[i])) {
h = hlist_nulls_entry(init_net.ct.hash[i].first,
struct nf_conntrack_tuple_hash, hnnode);
ct = nf_ct_tuplehash_to_ctrack(h);
hlist_nulls_del_rcu(&h->hnnode);
bucket = __hash_conntrack(&h->tuple, hashsize,
bucket = __hash_conntrack(&h->tuple, nf_ct_zone(ct),
hashsize,
nf_conntrack_hash_rnd);
hlist_nulls_add_head_rcu(&h->hnnode, &hash[bucket]);
}
@ -1299,6 +1345,11 @@ static int nf_conntrack_init_init_net(void)
if (ret < 0)
goto err_helper;
#ifdef CONFIG_NF_CONNTRACK_ZONES
ret = nf_ct_extend_register(&nf_ct_zone_extend);
if (ret < 0)
goto err_extend;
#endif
/* Set up fake conntrack: to never be deleted, not in any hashes */
#ifdef CONFIG_NET_NS
nf_conntrack_untracked.ct_net = &init_net;
@ -1309,6 +1360,10 @@ static int nf_conntrack_init_init_net(void)
return 0;
#ifdef CONFIG_NF_CONNTRACK_ZONES
err_extend:
nf_conntrack_helper_fini();
#endif
err_helper:
nf_conntrack_proto_fini();
err_proto:

21
net/netfilter/nf_conntrack_expect.c
View File

@ -27,6 +27,7 @@
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_tuple.h>
#include <net/netfilter/nf_conntrack_zones.h>
unsigned int nf_ct_expect_hsize __read_mostly;
EXPORT_SYMBOL_GPL(nf_ct_expect_hsize);
@ -84,7 +85,8 @@ static unsigned int nf_ct_expect_dst_hash(const struct nf_conntrack_tuple *tuple
}
struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net, const struct nf_conntrack_tuple *tuple)
__nf_ct_expect_find(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_expect *i;
struct hlist_node *n;
@ -95,7 +97,8 @@ __nf_ct_expect_find(struct net *net, const struct nf_conntrack_tuple *tuple)
h = nf_ct_expect_dst_hash(tuple);
hlist_for_each_entry_rcu(i, n, &net->ct.expect_hash[h], hnode) {
if (nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask))
if (nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
nf_ct_zone(i->master) == zone)
return i;
}
return NULL;
@ -104,12 +107,13 @@ EXPORT_SYMBOL_GPL(__nf_ct_expect_find);
/* Just find a expectation corresponding to a tuple. */
struct nf_conntrack_expect *
nf_ct_expect_find_get(struct net *net, const struct nf_conntrack_tuple *tuple)
nf_ct_expect_find_get(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_expect *i;
rcu_read_lock();
i = __nf_ct_expect_find(net, tuple);
i = __nf_ct_expect_find(net, zone, tuple);
if (i && !atomic_inc_not_zero(&i->use))
i = NULL;
rcu_read_unlock();
@ -121,7 +125,8 @@ EXPORT_SYMBOL_GPL(nf_ct_expect_find_get);
/* If an expectation for this connection is found, it gets delete from
* global list then returned. */
struct nf_conntrack_expect *
nf_ct_find_expectation(struct net *net, const struct nf_conntrack_tuple *tuple)
nf_ct_find_expectation(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_expect *i, *exp = NULL;
struct hlist_node *n;
@ -133,7 +138,8 @@ nf_ct_find_expectation(struct net *net, const struct nf_conntrack_tuple *tuple)
h = nf_ct_expect_dst_hash(tuple);
hlist_for_each_entry(i, n, &net->ct.expect_hash[h], hnode) {
if (!(i->flags & NF_CT_EXPECT_INACTIVE) &&
nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask)) {
nf_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask) &&
nf_ct_zone(i->master) == zone) {
exp = i;
break;
}
@ -204,7 +210,8 @@ static inline int expect_matches(const struct nf_conntrack_expect *a,
{
return a->master == b->master && a->class == b->class &&
nf_ct_tuple_equal(&a->tuple, &b->tuple) &&
nf_ct_tuple_mask_equal(&a->mask, &b->mask);
nf_ct_tuple_mask_equal(&a->mask, &b->mask) &&
nf_ct_zone(a->master) == nf_ct_zone(b->master);
}
/* Generally a bad idea to call this: could have matched already. */

3
net/netfilter/nf_conntrack_h323_main.c
View File

@ -29,6 +29,7 @@
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <linux/netfilter/nf_conntrack_h323.h>
/* Parameters */
@ -1216,7 +1217,7 @@ static struct nf_conntrack_expect *find_expect(struct nf_conn *ct,
tuple.dst.u.tcp.port = port;
tuple.dst.protonum = IPPROTO_TCP;
exp = __nf_ct_expect_find(net, &tuple);
exp = __nf_ct_expect_find(net, nf_ct_zone(ct), &tuple);
if (exp && exp->master == ct)
return exp;
return NULL;

20
net/netfilter/nf_conntrack_netlink.c
View File

@ -811,7 +811,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
if (err < 0)
return err;
h = nf_conntrack_find_get(net, &tuple);
h = nf_conntrack_find_get(net, 0, &tuple);
if (!h)
return -ENOENT;
@ -872,7 +872,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
if (err < 0)
return err;
h = nf_conntrack_find_get(net, &tuple);
h = nf_conntrack_find_get(net, 0, &tuple);
if (!h)
return -ENOENT;
@ -1221,7 +1221,7 @@ ctnetlink_create_conntrack(struct net *net,
int err = -EINVAL;
struct nf_conntrack_helper *helper;
ct = nf_conntrack_alloc(net, otuple, rtuple, GFP_ATOMIC);
ct = nf_conntrack_alloc(net, 0, otuple, rtuple, GFP_ATOMIC);
if (IS_ERR(ct))
return ERR_PTR(-ENOMEM);
@ -1325,7 +1325,7 @@ ctnetlink_create_conntrack(struct net *net,
if (err < 0)
goto err2;
master_h = nf_conntrack_find_get(net, &master);
master_h = nf_conntrack_find_get(net, 0, &master);
if (master_h == NULL) {
err = -ENOENT;
goto err2;
@ -1374,9 +1374,9 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
spin_lock_bh(&nf_conntrack_lock);
if (cda[CTA_TUPLE_ORIG])
h = __nf_conntrack_find(net, &otuple);
h = __nf_conntrack_find(net, 0, &otuple);
else if (cda[CTA_TUPLE_REPLY])
h = __nf_conntrack_find(net, &rtuple);
h = __nf_conntrack_find(net, 0, &rtuple);
if (h == NULL) {
err = -ENOENT;
@ -1714,7 +1714,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
if (err < 0)
return err;
exp = nf_ct_expect_find_get(net, &tuple);
exp = nf_ct_expect_find_get(net, 0, &tuple);
if (!exp)
return -ENOENT;
@ -1770,7 +1770,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
return err;
/* bump usage count to 2 */
exp = nf_ct_expect_find_get(net, &tuple);
exp = nf_ct_expect_find_get(net, 0, &tuple);
if (!exp)
return -ENOENT;
@ -1855,7 +1855,7 @@ ctnetlink_create_expect(struct net *net, const struct nlattr * const cda[],
return err;
/* Look for master conntrack of this expectation */
h = nf_conntrack_find_get(net, &master_tuple);
h = nf_conntrack_find_get(net, 0, &master_tuple);
if (!h)
return -ENOENT;
ct = nf_ct_tuplehash_to_ctrack(h);
@ -1912,7 +1912,7 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
return err;
spin_lock_bh(&nf_conntrack_lock);
exp = __nf_ct_expect_find(net, &tuple);
exp = __nf_ct_expect_find(net, 0, &tuple);
if (!exp) {
spin_unlock_bh(&nf_conntrack_lock);

14
net/netfilter/nf_conntrack_pptp.c
View File

@ -28,6 +28,7 @@
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <linux/netfilter/nf_conntrack_proto_gre.h>
#include <linux/netfilter/nf_conntrack_pptp.h>
@ -123,7 +124,7 @@ static void pptp_expectfn(struct nf_conn *ct,
pr_debug("trying to unexpect other dir: ");
nf_ct_dump_tuple(&inv_t);
exp_other = nf_ct_expect_find_get(net, &inv_t);
exp_other = nf_ct_expect_find_get(net, nf_ct_zone(ct), &inv_t);
if (exp_other) {
/* delete other expectation. */
pr_debug("found\n");
@ -136,17 +137,18 @@ static void pptp_expectfn(struct nf_conn *ct,
rcu_read_unlock();
}
static int destroy_sibling_or_exp(struct net *net,
static int destroy_sibling_or_exp(struct net *net, struct nf_conn *ct,
const struct nf_conntrack_tuple *t)
{
const struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_expect *exp;
struct nf_conn *sibling;
u16 zone = nf_ct_zone(ct);
pr_debug("trying to timeout ct or exp for tuple ");
nf_ct_dump_tuple(t);
h = nf_conntrack_find_get(net, t);
h = nf_conntrack_find_get(net, zone, t);
if (h) {
sibling = nf_ct_tuplehash_to_ctrack(h);
pr_debug("setting timeout of conntrack %p to 0\n", sibling);
@ -157,7 +159,7 @@ static int destroy_sibling_or_exp(struct net *net,
nf_ct_put(sibling);
return 1;
} else {
exp = nf_ct_expect_find_get(net, t);
exp = nf_ct_expect_find_get(net, zone, t);
if (exp) {
pr_debug("unexpect_related of expect %p\n", exp);
nf_ct_unexpect_related(exp);
@ -182,7 +184,7 @@ static void pptp_destroy_siblings(struct nf_conn *ct)
t.dst.protonum = IPPROTO_GRE;
t.src.u.gre.key = help->help.ct_pptp_info.pns_call_id;
t.dst.u.gre.key = help->help.ct_pptp_info.pac_call_id;
if (!destroy_sibling_or_exp(net, &t))
if (!destroy_sibling_or_exp(net, ct, &t))
pr_debug("failed to timeout original pns->pac ct/exp\n");
/* try reply (pac->pns) tuple */
@ -190,7 +192,7 @@ static void pptp_destroy_siblings(struct nf_conn *ct)
t.dst.protonum = IPPROTO_GRE;
t.src.u.gre.key = help->help.ct_pptp_info.pac_call_id;
t.dst.u.gre.key = help->help.ct_pptp_info.pns_call_id;
if (!destroy_sibling_or_exp(net, &t))
if (!destroy_sibling_or_exp(net, ct, &t))
pr_debug("failed to timeout reply pac->pns ct/exp\n");
}

3
net/netfilter/nf_conntrack_sip.c
View File

@ -23,6 +23,7 @@
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <linux/netfilter/nf_conntrack_sip.h>
MODULE_LICENSE("GPL");
@ -836,7 +837,7 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int dataoff,
rcu_read_lock();
do {
exp = __nf_ct_expect_find(net, &tuple);
exp = __nf_ct_expect_find(net, nf_ct_zone(ct), &tuple);
if (!exp || exp->master == ct ||
nfct_help(exp->master)->helper != nfct_help(ct)->helper ||

6
net/netfilter/nf_conntrack_standalone.c
View File

@ -26,6 +26,7 @@
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/nf_conntrack_zones.h>
MODULE_LICENSE("GPL");
@ -171,6 +172,11 @@ static int ct_seq_show(struct seq_file *s, void *v)
goto release;
#endif
#ifdef CONFIG_NF_CONNTRACK_ZONES
if (seq_printf(s, "zone=%u ", nf_ct_zone(ct)))
goto release;
#endif
if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
goto release;

8
net/netfilter/xt_CT.c
View File

@ -16,6 +16,7 @@
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_zones.h>
static unsigned int xt_ct_target(struct sk_buff *skb,
const struct xt_target_param *par)
@ -69,11 +70,16 @@ static bool xt_ct_tg_check(const struct xt_tgchk_param *par)
goto out;
}
#ifndef CONFIG_NF_CONNTRACK_ZONES
if (info->zone)
goto err1;
#endif
if (nf_ct_l3proto_try_module_get(par->family) < 0)
goto err1;
memset(&t, 0, sizeof(t));
ct = nf_conntrack_alloc(par->net, &t, &t, GFP_KERNEL);
ct = nf_conntrack_alloc(par->net, info->zone, &t, &t, GFP_KERNEL);
if (IS_ERR(ct))
goto err2;

4
net/netfilter/xt_connlimit.c
View File

@ -28,6 +28,7 @@
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_tuple.h>
#include <net/netfilter/nf_conntrack_zones.h>
/* we will save the tuples of all connections we care about */
struct xt_connlimit_conn {
@ -114,7 +115,8 @@ static int count_them(struct net *net,
/* check the saved connections */
list_for_each_entry_safe(conn, tmp, hash, list) {
found = nf_conntrack_find_get(net, &conn->tuple);
found = nf_conntrack_find_get(net, NF_CT_DEFAULT_ZONE,
&conn->tuple);
found_ct = NULL;
if (found != NULL)